WO2006069456A1 - Vorrichtung zur dosierten verabreichung eines fluiden produkts mit drehfederantrieb - Google Patents
Vorrichtung zur dosierten verabreichung eines fluiden produkts mit drehfederantrieb Download PDFInfo
- Publication number
- WO2006069456A1 WO2006069456A1 PCT/CH2005/000712 CH2005000712W WO2006069456A1 WO 2006069456 A1 WO2006069456 A1 WO 2006069456A1 CH 2005000712 W CH2005000712 W CH 2005000712W WO 2006069456 A1 WO2006069456 A1 WO 2006069456A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coupling
- movement
- locking
- engagement
- coupling member
- Prior art date
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
- A61M5/3204—Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
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- A—HUMAN NECESSITIES
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- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31553—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe without axial movement of dose setting member
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- A—HUMAN NECESSITIES
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- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31555—Mechanically operated dose setting member by purely axial movement of dose setting member, e.g. during setting or filling of a syringe
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- A—HUMAN NECESSITIES
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- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
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- A—HUMAN NECESSITIES
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- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
- A61M5/31585—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod performed by axially moving actuator, e.g. an injection button
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
- F04B49/106—Responsive to pumped volume
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- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2006—Having specific accessories
- A61M2005/202—Having specific accessories cocking means, e.g. to bias the main drive spring of an injector
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- A61M2005/3125—Details specific display means, e.g. to indicate dose setting
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- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
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- A61M2005/3125—Details specific display means, e.g. to indicate dose setting
- A61M2005/3126—Specific display means related to dosing
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- A61M5/178—Syringes
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- A61M5/3129—Syringe barrels
- A61M2005/3142—Modular constructions, e.g. supplied in separate pieces to be assembled by end-user
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- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
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- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
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- A61M2005/3247—Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
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- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
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- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
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- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
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- A—HUMAN NECESSITIES
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- A61M5/178—Syringes
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- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
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- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
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- A—HUMAN NECESSITIES
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- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
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- A61M5/31543—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
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- A—HUMAN NECESSITIES
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- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
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- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31556—Accuracy improving means
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- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
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- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
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Definitions
- the invention relates to a device for the metered administration of a fluid product with torsion spring drive.
- the device may in particular be an injection device, preferably in the form of an injection pen.
- Inj ekomstechnik are known for example from diabetes therapy, the administration of growth hormones or osteoporosis preparations.
- such devices are intended to guarantee that the correct dose is administered; on the other hand, the devices should be easy and convenient to use. These requirements are of particular importance when the user self-administers the product in question.
- Inj edictions gerate such as one of WO 01/10484 Al known, have a conveyor, a metering device and a drive device.
- the user himself applies the driving force required for the administration of the product by applying the driving force to the driving means.
- the drive device is coupled to the conveyor so that the initiated drive force is converted into a conveying activity of the conveyor.
- the invention relates to a device for administering a fluid product comprising a housing with a reservoir.
- the reservoir may itself form a container for the product or, preferably, a container for the product, for example an ampoule.
- the device further comprises a conveying device, through the conveying activity of which product is conveyed out of the reservoir or a receptacle preferably received therein.
- the device comprises a rotatably about a rotational axis movable coupling member for driving the conveyor, a secured against rotation with the coupling member first locking member and a second locking member in a releasable locking engagement with the first locking member whose rotational movement and therefore also the rotational movement of the coupling member in a Prevents drive direction and allows in an opposite direction of dosing.
- the device comprises a torsion spring and a triggering element, which is coupled to at least one of the locking members so that a triggering movement of the triggering element moves the at least one of the locking members out of the locking engagement.
- the torsion spring is connected to the coupling member so that it is tensioned in the metering direction rotational movement of the coupling member when locking members located in the dosing, the stored spring energy released after a release of the locking engagement and the coupling member is rotationally driven in the drive direction.
- the triggering element is not only the release of the locking engagement and concomitantly the triggering of the torsion spring, but also forms in dual function a dosing for adjusting the dose.
- the triggering element is accordingly coupled to the torsion spring so that the torsion spring is tensioned by the blocking element in locking engagement by a metering movement of the triggering element.
- the trigger element is preferably movable in translation along the axis of rotation.
- the triggering element is preferably rotatable about the axis of rotation.
- the trigger element is arranged in a proximal end region of the injection device.
- it preferably forms a push-button which is actuated upon administration towards the site of administration.
- the triggering element can also be made in preferred embodiments, a dose correction.
- the triggering element is coupled to at least one of the locking members so that a disengagement movement of the triggering member moves the respective locking member out of the locking engagement.
- the torsion spring is decoupled from the conveyor for dose correction, so that product can not be accidentally spilled.
- the decoupling can be effected by the disengagement.
- the torsion spring is connected by means of a coupling for driving the conveyor with this. In a dormant state, in which the device itself.
- the clutch is advantageously dissolved, while the trigger element is still coupled to the coupling member during the disengagement and in the fully disengaged state so that ' prevent the user the coupling member by holding the trigger element to a rotational movement in the drive direction can.
- Operating errors in the dose correction could possibly lead to a reduction of the set dose beyond the desired level, but this can be corrected by releasing the trigger element and re-dosing without further consequences.
- the disengagement movement is preferably counter to the release movement.
- the coupling member and the conveyor are advantageously coupled together by the release movement of the triggering element.
- the triggering element thus triggers in its release movement not only the locking engagement of the locking members, but also provides in the course of the same movement a clutch engagement ago, via which the torsion spring drives the conveyor after releasing the locking engagement of the locking members.
- the release movement is this advantageously divided into functional phases, the run sequentially, but preferably are continuously executable.
- the coupling member is coupled to the conveyor and solved in existing coupling of the locking engagement in a subsequent phase.
- the clutch engagement is designed to be correspondingly long for the overlap in the direction of the clutch movement.
- the triggering element not only exerts the dual function according to the invention, but in a third function triggers the puncture of an injection needle if the device is equipped with an injection needle as preferred and is not formed as a pressure injector.
- a needle protector resiliently connected to the housing is coupled to the trigger member via the housing by means of a resistive element such that the needle shield is movable up against the resistive element in a first phase of the piercing action and the triggering element is in the position then occupied by the needle shield via a coupling mechanism acting on at least one of needle guard and resistance element, that a positive and / or frictional contact between the two, which prevents further movement of the needle guard in the proximal direction, is released.
- the coupling mechanism for the thus controlled piercing operation and the coupling of the triggering element with the at least one of the locking members for releasing the locking engagement are designed so that the triggering element during the release movement first causes the release of the needle guard, so that the injection needle can pierce, and only im- further course of the release movement of the locking engagement of the locking members dissolves.
- the clutch couples the coupling member to the conveyor to impart the driving force to the torsion spring for delivery of the product to the conveyor transfer.
- the disengaged state it decouples the conveyor from the coupling member, so that acting on the coupling member manipulations, such as the setting of a dose, in particular a dose correction, the conveyor can not influence, in such embodiments preferably causes the triggering element again by his Tripping movement, that the clutch engagement by a coupling movement of a coupling member, preferably of the above-mentioned coupling member, or more coupling members, preferably including the above-mentioned coupling member is prepared.
- the coupling member is in such embodiments, a coupling member in the strict sense, while it can always be coupled in simple embodiments with the conveyor, but of course for the purpose of distribution by execution of the release movement must first released.
- the coupling consists of at least two coupling members, of which said coupling member forms the coupling input member and the other is coupled as a coupling output member to the conveyor. At least one of the coupling members, preferably the clutch input member, is movable into the clutch engagement, and at least one of the clutch members, which is preferably the same but need not be, is movable out of the clutch engagement.
- the device further comprises a holding device which holds the coupling members in a mutually decoupled holding position. Accordingly, at least one of the coupling members is movable with a coupling movement from the holding position into the clutch engagement. In the holding position, the power flow between the coupling members is interrupted. In the clutch engagement, however, the driving force of the drive member via the coupling members is transferable to the conveyor and causes a delivery movement of the conveyor.
- the holding device is or comprises in preferred embodiments a return member which counteracts the coupling movement with an elastic restoring force.
- the holding device could also act positively by the at least one clutch movement exporting coupling member on the housing or a fixed at least with respect to the coupling movement structure is fixed by a releasable positive connection.
- the torsion spring can itself form the restoring member, or it is provided a return member specifically for the holding function.
- the clutch input member and the clutch output member may be directly in the clutch engagement with each other in the engaged state of the clutch.
- the coupling comprises a coupling intermediate member, via which the coupling input member is coupled with the coupling output member in the clutch engagement.
- the clutch engagement between the clutch input member and the intermediate coupling member is made.
- the intermediate coupling member is preferably also connected to the coupling output member in the holding position of the coupling members, i. in the disengaged state, in an intervention in which the driving force is transferable.
- it is movable in engagement relative to the clutch output member, preferably in and against the direction of clutch movement.
- the coupling output member is fixed to the housing in the holding position of the coupling members so that it can not perform any movement that would cause a delivery movement of the conveyor.
- the coupling output member must be released consciously, preferably immediately in connection with the distribution of the product.
- the attachment to the housing part is achieved by execution of the coupling movement.
- the coupling engagement is produced during a path section traveled during the coupling movement in a first phase, and in a subsequent second phase the attachment to the housing is released, advantageously against said elastic restoring force of the retaining device.
- the coupling output member is in the holding position of the coupling members over the Intermediate coupling member fixed to the housing.
- the locking engagement in which the intermediate coupling member is for this purpose with the housing or a structure connected thereto, is expediently achieved by the execution of the coupling movement. It is advantageous if the intermediate coupling member in the direction of the coupling movement from the locking engagement is movable, since such mobility allows that the intermediate coupling member simply taken in the coupling movement, for example, is pressed out of the locking engagement.
- the locking engagement can be positive and / or frictional.
- the return member acts on the coupling member via the intermediate coupling member and holds it in the holding position.
- the return member acts directly on the coupling member and is supported for the application of, for example, on the housing or with it with respect to the coupling movement firmly connected to the housing structure or on the coupling output member.
- the coupling output member is engaged with the conveyor in an engagement, preferably a threaded engagement, but in principle can also be coupled in an alternative embodiment only via intermediate links with the conveyor to effect the discharge.
- a rotational movement of the drive member is converted into preferably a translational movement of a conveyor member of the conveyor.
- the thread engagement is advantageously not self-locking, so that by a force exerted in the direction of the threaded axis on the threaded engagement translationally movable conveyor member, the conveying member is axially movable.
- the device has a dose indicator for displaying the adjusted product dose.
- the display can be an acoustic and / or tactile and / or in particular optical.
- the dose indicator is coupled to the dosing member such that movement that the dosing member makes upon adjustment of the product dose causes a change in the displayed product dose.
- the dosing member and / or the dose indicator is / are decoupled from the conveyor. By decoupling the dose can be disengaged Condition can be adjusted without any effect on the conveyor and corrected if necessary.
- the coupling of dose indicator and torsion spring remains in the clutch engagement, so that one of the dosing movement opposing drive movement of the torsion spring with progressive distribution in the same way is progressively reset.
- the dose display thus indicates the remaining portion of the set dose which has not yet been distributed. This can be advantageous, for example, if the set dose is greater than the one still available.
- the triggering element is advantageous decoupled in the clutch engagement of the torsion spring, so that during the drive movement of the torsion spring on the trigger element no back acting on the torsion manipulations can be made.
- the torsion spring may in particular be a spiral spring.
- the spiral spring is wound around a rotational axis of the rotational movement, wherein advantageously at least one outer spring coil surrounds an inner one.
- the spring with respect to the axis of rotation anywhere on the slope zero.
- the turns are arranged axially adjacent to each other.
- the spiral spring is connected to one of its two ends, preferably the radially inner end, secured against rotation with the coupling input member.
- the other end, preferably the radially outer end is secured against rotation with the . Housing connected.
- the clutch input member forms a drum on which the coil spring is wound.
- the coupling movement is preferably an axial stroke movement. If a piston and a piston rod form the conveyor, the coupling movement is preferably carried out in Vorretesrichrung the piston and the piston rod.
- Those coupling members which form the clutch engagement between them in particular be provided with engagement elements, the engagement in the hitch be cooperating as axially displaceable grooves and springs or formed as axially facing teeth or more preferably as bevel gears.
- a single tooth and a single tooth gap are generally sufficient for the clutch engagement
- it is preferred if, in at least one of the clutch engagement coupling members forming a toothing around the rotation axis is formed circumferentially. More preferably, the two coupling members for the clutch engagement each have a toothing circumferentially. In as grooves and springs or differently formed engaging elements applies accordingly.
- the clutch engagement is formed regardless of the question of the shape of the clutch surfaces so that slip does not occur in the clutch engagement.
- the injection device is equipped with a decoupling mechanism.
- the decoupling mechanism is coupled to at least one of the locking members so that when disengaging the housing parts by the relative movement to be executed between the housing parts of the locking engagement is released, so that the torsion spring moves the coupling member in a zero dose position, the coupling member should not already assume the zero dose position.
- the decoupling mechanism comprises a decoupling member, which is moved by the relative movement to be executed when releasing the housing parts in a decoupling position.
- the decoupling member is coupled to the at least one of the locking members so that this decoupling movement moves the respective locking member out of the locking engagement.
- the decoupling member acts on the coupling member and also moves this in a decoupling position, and the coupling member moves the respective locking member from the locking engagement, preferably by a driving engagement.
- the decoupling member advantageously decouples the coupling member from the conveyor.
- the first locking member which is secured against rotation with the coupling member, also fulfills another function beyond the locking function, namely the function of limiting the rotational movement of the coupling member in the drive direction, in this further function, it determines the zero dose position of the coupling member.
- the first locking member is provided for this purpose with a thread about the axis of rotation, and at one end of the thread at least one rotational stop for engagement of a stop member is formed.
- the housing or a non-movably connected structure guides the stop member against rotation parallel to the axis of rotation, so that the stop member is axially reciprocated in the setting of the dose and the discharge stops and stops the rotational movement of the coupling member against the rotational stop.
- the first locking member may be connected to the coupling member axially not movable.
- the coupling member and the first locking member are axially movable relative to each other, wherein the first locking member is pressed in the axial direction of a resilient return member in the locking engagement to a maximum against a stop against the coupling member.
- This return member may advantageously also be the return member or a return member of the holding device.
- FIG. 1 shows an injection device of a first exemplary embodiment in a perspective view
- FIG. 3 shows the injection device with a closed clutch
- FIG. 4 shows a detail of FIG. 2
- FIG. 5 shows a detail of FIG. 3
- FIG. 6 the injection device after setting a dose
- FIG. 7 the injection device after emptying a reservoir
- FIG. 8 shows a decoupling member and a housing part of the injection device
- Figure 10 shows the distal portion during the release of the housing parts Figure 11 an injection device of a second exemplary embodiment with open
- Figure 13 is a detail of Figure 11
- Figure 14 is a detail of Figure 12
- Figure 15 ' the injection device of the second embodiment after setting a
- FIG. 19 shows an injection device of a third embodiment
- FIG. 20 shows a proximal part of the injection device of the third embodiment with the clutch opened
- Figure 21 the injection device of the third exemplary embodiment with closed
- FIG. 23 shows the proximal part of the injection device of the third exemplary embodiment after emptying the reservoir
- FIG. 24 shows a locking member and a stop member of the third exemplary embodiment.
- FIG. 1 shows an injection device of a first exemplary embodiment.
- the injection device has a first housing part 1 and a second housing part 4, which are detachably connected to each other.
- the housing parts 1 and 4 are screwed together.
- the injection device is formed as a slim Injetationspen.
- the housing part 1 serves to receive a container 2 filled with fluid product and in this sense forms a reservoir, and the housing part 4 serves as a carrier for a metering and drive device, from which a dosing member 18 can be seen.
- the housing part 4 is pierced in the region of the dosing member 18, so that a user has direct access to the dosing member 18.
- the dosing member 18 is rotatably mounted about a central longitudinal axis of the device and formed as a sleeve which is grooved user-friendly at its outer periphery.
- a dose indicator 20 which is laterally mounted through an opening in the shell of the housing part 4.
- Figure 2 shows the injection device of the first embodiment in a longitudinal section.
- the container 2 is received.
- a piston 3 is movably received in a driving direction V.
- the piston 3 closes the container 2 liquid-tight at its proximal end.
- product is displaced by an outlet of the container 2 and distributed, preferably by a protruding into the outlet, by means of a needle holder at the distal end of the housing part 1 attached injection needle.
- the container 2 is formed in the manner of conventional ampoules.
- the housing part 1 directly forms a container holder, in the embodiment an ampoule holder.
- the housing part 1 protrudes with its proximal end into the housing part 4, and is screwed to the housing part 4.
- the housing part 4 accommodates a piston rod 15 and the metering and drive device, which is formed as a metering and drive mechanism.
- the metering and drive device comprises in a metering and drive train, a drive member 5 and a clutch 6-11, which couples the drive member 5 with the piston rod 15 in a coupled state, ie in a clutch engagement.
- the piston rod 15 forms with the piston 3 a conveyor.
- coupling members 6-10 transmit a driving force exerted on the drive member 5 to the piston rod 15.
- there is no clutch engagement so that the piston rod 15 is decoupled from the drive member 5.
- the user can adjust the product dose to be administered by a metering movement of the dosing member 18, in the exemplary embodiment a rotational movement.
- the drive member 5 is sleeve-shaped. It has on its outer shell surface a thread about a pointing in the direction of advance V thread axis R. With this thread, the drive member 5 is in threaded engagement with a coupling input member 6.
- the coupling input member 6 is also sleeve-shaped and provided for the threaded engagement with a corresponding internal thread. The thread pitch in the threaded engagement is so great that a self-locking can not occur.
- the dosing member 18 surrounds the clutch input member 6 and is secured against rotation with the clutch input member 6 and axially non-movably connected. The piston rod 15 protrudes into the drive member 5 and the clutch input member. 6
- the piston rod 15 is provided over its axial length with an external thread. With the external thread, it is in a threaded engagement with a coupling output member 9, which is provided with a corresponding internal thread. These two threads also have a pitch that prevents self-locking in threaded engagement.
- the thread pitch is preferably less than the thread pitch in threaded engagement between the drive member 5 and the clutch input member 6.
- a coupling sleeve 8 is secured against rotation with the coupling output member 9 and axially non-movably connected.
- the coupling sleeve 8 and the coupling output member 9 can take place with respect to the between the drive member 5 and the piston rod 15 Movements are considered as a one-piece component; However, they are designed to accommodate a balance spring 17 in two parts and firmly connected.
- the coupling output member 9 and the coupling sleeve 8 are rotatable about the threaded axis R of the coupling output member 9, but not axially movable mounted in the housing part 4.
- the piston rod 15 extends through the threaded engagement of the coupling output member 9 and projects into the coupling sleeve 8.
- the compensating spring 17 is clamped, which acts as a compression spring in the advancing direction V on the piston rod 15.
- the compensating spring 17 presses on the piston rod 15 via a plate 15a, which is rotatably supported on the piston rod 15 and forms a flange of a sleeve placed on the piston rod 15.
- the piston rod 15 is guided in a linear guide 4a relative to the housing part 1 is not rotatable in and against the driving direction V linear.
- the drive member 5 is also linearly movably guided relative to the housing part 4 in and against the advancing direction V, for which the housing part 4 directly forms a linear guide 4b.
- the threaded axis of the piston rod 15 forms the main axis of movement of the device.
- the threaded axis of the piston rod 15 forms a rotation axis R. It forms both threaded axes. Furthermore, it forms the translation axis for the piston rod 15 and the drive member. 5
- the clutch 6-11 further comprises a coupling intermediate member 7 and a return member 10, which is formed as a compression spring, and the intermediate coupling member 7 is acted upon by an acting against the advancing direction V elastic force.
- the return member 10 is clamped between the coupling output member 9 and the intermediate coupling member 7.
- FIG. 3 shows the injection device in a coupled state.
- engagement elements that produce in the clutch engagement a Verwar secured connection of the two members 6 and 8 about the pointing in the direction of advance V thread axis R.
- the engagement elements cooperate as grooves and tongues or gears which are formed parallel to the advancing direction V and evenly distributed about the thread axis R.
- Figures 4 and 5 show the range of the clutch engagement in detail.
- Figure 4 shows the device in the decoupled and Figure 5 in the coupled state.
- FIG. 4 thus corresponds to FIG. 2, and
- FIG. 5 corresponds to FIG. 3.
- the coupling input member 6 is moved away from the coupling sleeve 8 counter to the advancing direction V, so that the coupling input member 6 moves relative to the coupling sleeve 8 and the coupling output member 9 firmly connected thereto is freely rotatable.
- the coupling output member 9 via the coupling sleeve 8, the intermediate coupling member 7 and a decoupling member 11 against rotation with the housing part 4 is connected.
- the intermediate coupling member 7 are provided on one of the coupling sleeve 8 radially facing inner surface with engagement elements 7b and the coupling sleeve 8 with corresponding engagement elements 8b.
- the intermediate coupling member 7 are provided on an outer circumferential surface with engagement elements 7a and the decoupling member 11 on a shell inner surface with radially facing engagement elements I Ia, which in decoupled state as the engaging elements 7b and 8b in the manner of grooves and springs or teeth, which are parallel to the driving direction V, interlock.
- the intermediate coupling member 7 is axially movable in its rotationally secured engagement with the coupling sleeve 8 and its rotationally secured engagement with the decoupling member 11 in and against the advancing direction V, wherein the engagement with the decoupling member 11 dissolves in a movement in the advancing direction V.
- the drive member 5 If the drive member 5 is actuated by exerting a pressure force on a trigger element 16 in the advance direction V, the drive member 5 and the clutch input member 6 jointly perform an axial clutch stroke of length X. In this drive stroke or clutch movement, the clutch input member 6 abuts the intermediate clutch member 7 the restoring elasticity force of the return member 10 in the advancing direction V. In the course of the lifting movement, the engagement elements 6a and 8a engage with each other, while the intermediate coupling member 7 moves simultaneously relative to the decoupling member 11 until it passes from the non-rotatably engaged with the decoupling member 11. In this case, the intermediate coupling member 7 remains in the rotationally secured engagement with the coupling sleeve 8. The coupling movement is limited by a stop of the trigger element 16 on the coupling sleeve 8, in the embodiment at the proximal end face ( Figure 3).
- FIG. 5 shows the injection device in the coupled state.
- the engagement elements 6a and 8a are in axial overlap, so that the clutch engagement is produced as a rotationally secured engagement between the clutch input member 6 and the coupling sleeve 8.
- the engagement between the intermediate coupling member 7 and the decoupling member 11 dissolves only after the clutch engagement is made safe.
- the user twists the dosing member 18, which locks in easily releasable latching positions.
- the dosing member 18 is secured against rotation and also axially immovably connected to the coupling input member 6, so that this rotates.
- the drive member 5 guided linearly at 4b in and against the advancing direction V is moved in the proximal direction and then projects out of the housing part 4.
- the axial metering path of the drive member 5 results itself from the angle of rotation by which the dosing member 18 is rotated and the thread pitch in threaded engagement between the drive member 5 and the clutch input member 6, which is in the advancing direction V against the intermediate coupling member 7 and against the advancing direction V against the housing part 4 to stop.
- FIG. 6 shows the injection device with still completely filled container 2 after setting a first dose.
- the user pierces the skin with a hypodermic needle for a subcutaneous injection.
- the user actuates the drive member 5 by pressing it in the advancing direction V into the housing part 4.
- the clutch movement or the clutch stroke X the drive member 5 takes the clutch input member 6 against the elastic restoring force of the remindstelldements 10 until the clutch engagement with the coupling sleeve 8 made and the rotationally secured engagement between the intermediate coupling member 7 and the decoupling member 11th are solved.
- the clutch stroke X is completed, and it joins as a second portion of the drive movement to a delivery stroke.
- the drive member 5 is further pressed in the advancing direction V. Since the coupling input member 6 can perform no further movement in the advancing direction V via the axial stop against the intermediate coupling member 7, it rotates in the threaded engagement with the drive member 5 guided non-rotatably guided about the common threaded axis R.
- the clutch input member 6 takes in its rotational movement in the clutch engagement the Coupling sleeve 8 and this the coupling output member 9 with.
- the coupling sleeve 8 is held axially non-movably in the housing part 4 together with the coupling output member 9.
- the rotational movement of the coupling output member 9 causes via the threaded engagement with the piston rod 15 and its non-rotating linear guide at 4a the propulsion and thus the Aus featureiolo the piston rod 15 and thus the piston together 3.
- the injection button 16 in the course of Antriebsund Aus featureiolo in abutting contact against the coupling sleeve reaches ( Figure 3), the discharge is completed. If the user takes the pressure of the trigger element 16, the return member 10 moves via the intermediate coupling member 7, the clutch input member 6 again in the withdrawn from the clutch engagement holding position, as shown in Figures 2 and 4.
- FIG. 7 shows the injection device at the end of a last discharge with which the container 2 was emptied.
- the housing part 1 is released from the housing part 4, in the exemplary embodiment by a screwing movement.
- the decoupling member 11 is automatically relative to the housing part 4 against the direction of the coupling movement of the coupling input member 6, in the embodiment against the advancing direction V moves.
- the housing part 4 supports the decoupling member 11 accordingly.
- the distance traveled by the decoupling member 11 relative to the housing part 4 while axial distance is as long as the clutch stroke X, so that the decoupling member 11 after loosening the housing parts 1 and 4 the clutch input member 6 axially opposite this blocked and the clutch input member 6 is no longer in the Propulsion direction V can be moved, at least not in the clutch engagement with the coupling sleeve 8.
- FIG. 8 shows the decoupling member 11 and the first housing part 1 in a perspective view.
- the decoupling member 11 is a sleeve part and has in a distal portion three radially inwardly projecting engagement elements 12 and in a proximal portion on a radially outwardly projecting fixing element 13.
- Figure 9 shows the housing part 1 and a connecting portion of the housing part 4, wherein the hidden decoupling member 11 is shown by dashed lines.
- the decoupling member 11 is rotatably and axially movably received in the connecting portion of the housing part 4.
- the relative mobility is determined by an axial guide 4e and a Umfa ⁇ gs Adjust 4c, along which the engagement member 13 moves along successively, when the housing part 1 is released from the housing part 4.
- the circumferential guide 4c extends at right angles to the axial guide 4e in the circumferential direction about the screw axis. It is formed as a breakthrough or recess in the housing part 4.
- the decoupling member 11 With the housing part 1, the decoupling member 11 is in a guide engagement.
- a guide curve 1a is formed on a casing outer surface of the housing part 1 per gripping element 12, which guides the gripping element 12 and thus the decoupling element 11 when the housing parts 1 and 4 are released.
- a parallel spaced further guide curve Ia performs the decoupling member 11 when connecting the housing parts 1 and 4 accordingly (Fig. 10).
- the guide curve Ia extends obliquely in a distal section, ie with a pitch, to the screw axis of the screw connection of the housing parts 1 and 4, so that when the relative rotation between the housing parts 1 and 4 required for the release, the engagement element 12 slides along the guide curve Ia an axial movement of the decoupling member 11 relative to the housing part 4 performs against the advancing direction V until the fixing element 13 reaches the axial height of the circumferential guide 4c.
- the slope is about 45 ° and is constant.
- a movement of the decoupling against the coupling input member to be executed for engagement Coupling movement X causes.
- a distal portion of the guide curve Ia extends axially, so that in the further disassembly of the housing parts 1 and 4, the fixing element 13 is moved along the circumferential guide 4c. In the course of this relative circumferential movement between the decoupling member 11 and the housing part 4, the fixing element 13 slides over a fixing element 4d in the region of the circumferential guide 4c.
- the fixing element 4d is formed as a cam on a strip portion of the housing part 4.
- the strip section acts as a tightly clamped bending spring on both sides, which yields resiliently during the movement of the fixing element 13 via the fixing element 4d, in order subsequently to spring back into its starting position and form a releasable latching engagement for the decoupling element 11. Ln the locking position, the fixing member 13 is fixed in the one Ümfangscardi on the fixing element 4d and in the other Ümfangsplatz on a shoulder formed in the circumferential guide 4c on stop and thereby in both circumferential directions.
- FIG. 10 shows the two housing parts 1 and 4 and the decoupling member 11 after the fixing element 13 has been moved behind the fixing element 4d of the housing part 4.
- the decoupling member 11 is secured against rotation by means of the fixing elements 4d and 13 with the housing part 4 in the releasable latching engagement and in this way on the housing part 4 and axially fixed.
- the decoupling member 1 1 blocks the clutch input member 6 and thereby ensures the decoupling of drive member 5 and piston rod 15 safely.
- the decoupling element 11 has reached the latching position, its engagement element 12 moves out of the guiding engagement with the guide curve 1a in the further unscrewing of the housing parts 1 and 4.
- the guide curve Ia is shaped accordingly.
- the dose indicator 20 of the first embodiment is coupled to the drive member 5 via a display coupling member 21 and the clutch input member 6.
- the display coupling member 21 is connected to the clutch input member 6 secured against rotation, in the embodiment by forming a ring on the coupling member 6 and relative to this in and against the direction of the coupling movement X is movable.
- the display coupling member 21 is reversible to the housing part 4 rotatable about the rotation axis R, however, is held axially non-movable relative to the housing part 4.
- the display coupling member 21 has circumferentially a toothing, which is formed in Ausuxungsbeispiel as a conical toothing, with which it is in mesh with a gear of the dose indicator 20 to initiate the metering movement and the drive movement in the transmission.
- Figures 11 to 18 show an injection device of a second embodiment.
- the injection device of the second embodiment has compared to the device of the first embodiment, some modifications with respect to the coupling and decoupling of drive member 5 and piston rod 15.
- the drive member 5 and the piston rod 15 itself and also the basic interaction during coupling and decoupling have remained the same.
- the functionally identical components are provided with the same reference numerals as in the first embodiment. To refer to modifications, the components in question are provided with the same but apostrophic reference numerals.
- FIG. 11 shows the injection device in the idle state, in which the drive member 5 is decoupled from the piston rod 15.
- the first housing part 1 is covered with a protective cap 37 connected to the housing part 4, which is removed for product administration.
- the clutch engagement between the modified clutch input member 6 'and the modified intermediate coupling member T made and solved.
- Figure 12 shows the injection device of the second exemplary embodiment in the coupled state, which is produced by the action of the trigger element 16 and thus the drive member 5 and the clutch input member 6 'by acting in the drive direction V driving force.
- the protective cap 37 has been replaced by a housing part 38, which is placed on the housing part 4 and snapped with this.
- the housing part 38 supports a needle guard 39, preferably in the form of a needle protection sleeve, against the advancing direction V resiliently movable.
- the needle guard 39 springs against the advancing direction V in the housing part 38; In reversal of this movement, the needle protrudes through a distal opening of the needle guard 39.
- Figures 13 and 14 show the region of the clutch engagement in detail, with Figure 13 for the decoupled state and Figure 14 is the coupled state.
- the engagement elements 6a and 7c between which the clutch engagement is made, to the propulsion direction V on a slope.
- the engagement elements 6a and 7c are each formed in the manner of a bevel gear ring revolving around the threaded axis of the piston rod 15.
- the clutch input member & thereby forms its engagement elements 6a at its distal end as an inner cone
- the intermediate coupling member T forms the Emgriffsetti 7 c at its proximal end as an outer cone.
- the conical engagement surfaces are congruent to each other and are axially facing each other with the clear distance X directly opposite.
- the coupling surfaces could be congruent convex / concave instead of conical.
- the intermediate coupling member T is in contrast to the first exemplary embodiment axially movable and secured against rotation in each axial position with the coupling output member 9 in one engagement. It is again formed as a sleeve part and axially slidable on the Coupled output member 9 stored. For this purpose, it passes through the axially correspondingly slotted coupling sleeve 8 ', which is not visible in the figures.
- the non-rotating connection is created in a form-fitting manner via engagement elements which are formed as axially straight toothings.
- intermediate coupling member T and decoupling member 11 may alternatively be purely frictional.
- the engagement elements 7a and 11a have mutually facing, congruent friction surfaces; in the exemplary embodiment, these would be the mutually facing conical surfaces.
- the dosing member 18 ' is the dosing member 18 '.
- the dosing member 18 ' relative to the housing part 4 in the direction of the coupling movement X, in the embodiment, the axial direction, not movable.
- the clutch input member 6 ' although again secured against rotation, but axially movable with the dosing 18' connected.
- the rotationally secured engagement between the clutch input member 6 'and the dosing member 18' consists in the decoupled state of the drive member 5 and piston rod 15 and is released in the course of the clutch stroke X, namely immediately before the non-rotating connection between the coupling output member 9 and the housing part 4 is released.
- the clutch input member 6 'and the dosing member 18' are provided with engaging elements 6b and 18a, which are formed on radially mutually facing lateral surfaces of the two members 6 'and 18' in the manner of grooves and springs.
- engaging elements 6b and 18a are formed on radially mutually facing lateral surfaces of the two members 6 'and 18' in the manner of grooves and springs.
- the holding device of the second embodiment comprises a return member 14, a support structure 6c and the dosing member 18 '.
- the return member 14 acts on the clutch input member 6 'via the support structure 6c with an elastic restoring force, which counteracts the coupling movement X of the clutch input member 6'.
- the return member 14 is supported on the dosing member 18 ', which forms a support shoulder for this purpose.
- the support structure 6c is immovably connected to the clutch input member 6 'in and against the direction of the clutch movement X. It is formed as a short sleeve with an outer flange, on which the return member 14 is supported. against the direction of the coupling movement X is the support structure 6c with respect to the housing part 4 to stop. By the coupling movement X, the clutch input member 6 'against the elastic restoring force of the return member 14 in the clutch engagement with the intermediate coupling member 7' moves.
- the return member 14 is formed as in the first embodiment as a in the direction of the clutch movement X acted upon by a compressive force spring.
- the operation of the modified coupling 6'-I l ', 14' is the same as the coupling of the first exemplary embodiment.
- the coupling output member 9 in the decoupled state via the coupling sleeve 8 ', the intermediate coupling member T and the decoupling member 11' is secured against rotation with the housing part 4 is connected.
- the clutch stroke X FIG. 11
- Figure 14 shows the injector in the coupled state, i. in clutch engagement.
- Figures 15 and 16 correspond to Figures 6 and 7 of the first embodiment, so that it can be referred to.
- FIG. 17 shows the injection apparatus of the second embodiment of the invention during the replacement of the reservoir 2.
- the housing part 1 is released from the housing part 4, whereby the decoupling member 11 'is moved to the decoupling position.
- This function corresponds completely to that of the decoupling member 11 of the first embodiment, so that reference may be made to the explanations there and the figures 8-10.
- the housing part 1 In the state shown in FIG. 17, the housing part 1 already accommodates the new reservoir 2.
- the housing part 1 In order to connect the housing part 1 with the housing part 4, the housing part 1 can be moved toward the housing part 4 with the piston 3 closing the reservoir 2 proximally.
- the freely projecting from the housing part 4 piston rod 15 is moved back by the Antechnischden piston 3 in threaded engagement with the freely rotatable, but axially fixed coupling output member 9.
- the rotationally secured linear latch 4a which is formed in the second embodiment by a non-rotating inserted into the housing part 4 coupling space, performs the piston rod 15 when pushed back an axial linear movement, while the coupling output member 9 rotates freely together with the coupling sleeve 8 'about the common thread axis.
- FIG. 18 shows the coupling region with the decoupling member 11 'located in the decoupling position in detail.
- the function of the decoupling member 11 ' corresponds to that of the first exemplary embodiment, namely blocking of the clutch input member 6' in the withdrawn axial position.
- the metering movement and the drive movement are also introduced via the clutch input member 6 'and a display coupling member 22 in a transmission of the dose display 20'.
- the display coupling member 22 is secured against rotation with the coupling input member 6 'connected and not movable relative to the housing part 4 in and against the direction of the coupling movement X.
- Figures 19 to 24 show a third embodiment of an injection device in which the driving force for the product distribution is not applied manually, but by a drive member 25 which is formed as a drive spring during administration.
- the drive member 25 is tensioned by adjusting the dose to be administered.
- the spring energy absorbed during the dose setting is released when the device is triggered and converted into the propulsion of the piston rod 15.
- FIG. 19 shows the injection device of the third exemplary embodiment, complete with the mounted housing part 38 and the needle guard 39 slidably received against the advancing direction V against the force of a return spring.
- FIGS. 20 and 21 show the housing part 4 with the components of the injection device accommodated therein, FIG. 20 in a rest state comparable to the preceding exemplary embodiments, in which the dose can be set, and FIG. 21 in clutch engagement. Unless otherwise stated below, reference is made in particular to FIGS. 20 and 21.
- the drive member 25 is acting as a torsion spring coil spring with spring coils which rotate about the threaded axis R of the threaded engagement between the coupling output member 9 and the piston rod 15.
- the spring coils are arranged radially one above the other to the thread axis R; they have the slope of zero to the thread axis.
- the clutch input member 6 ' is fixed to the clutch input member 6 ', and an outer end is fixed to a support structure 26 which is connected to the housing part 4 in the direction of coupling movement X movable, but secured against rotation.
- the support structure 26 is non-movably connected to the clutch input member 6 'in and against the direction of the clutch movement X.
- the clutch input member 6 ' is rotatable relative to the support structure 26 about the threaded axis R.
- Another support structure 6d is connected to the coupling input member 6 'in and against the direction of the coupling movement X is not movable;
- the clutch input member 6 1 and the support structure 6 d are formed in one piece.
- the drive member 25 is axially surrounded by the support structures 6d and 26.
- the coupling corresponds in its operation to that of the second embodiment, so that the same reference numerals are used for the coupling members 6'-1O 1 and the decoupling member 11 '.
- the local coupling sleeve 8 ' is omitted.
- the intermediate coupling member 7 ' is directly with the coupling output member 9 in a rotational drive movement of the coupling input member 6' on the coupling output member 9 engaging engagement.
- Denoted at 20 " is a dose indicator coupled to the clutch input member 6 'via a display coupling member 23, and already connected to the clutch input member 6' in a rotationally secure manner with the indicator coupling members 21 and 22 of the other embodiments the indicator coupling member 23 is not movable relative to the housing member 4.
- the rotationally secured connection of the indicator coupling member 23 is in both the disengaged and engaged states of the device.
- the rotation lock consists in the illustrated holding position of the coupling members 6 ', 7' and 9 between a first locking member 24 and a second locking member 34.
- the locking member 24 is secured against rotation with. the clutch input member & connected.
- the locking member 34 is secured against rotation with the housing part 4, but movable relative to the housing part 4 and the coupling input member 6 'in and against the direction of the coupling movement X.
- the locking members 24 and 34 form with their ' locking engagement with each other contacting faces a ratchet, which allows the drive member 25 exciting rotational movement of the clutch input member 6 and prevents rotation in the opposite direction.
- FIG. 24 shows the coupling input element 6 'with the blocking element 24 mounted thereon secured against rotation, the indicating coupling element 23 connected nonrotatably to the coupling input element 6' and a connecting part 33 non-movably connected to the input element 6 '.
- the indicating coupling element 23 forms a single counting ring of the dose indicator 20 ".
- the locking member 24 is provided on a proximal end face facing the locking member 34 with ratchet teeth 24a uniformly disposed about the axis R, which cooperate with counter teeth of the locking member 34 in locking engagement with each other
- the locking member 24 is provided with a thread 24b for a secondary function in connection with metering and dispensing on a shell outer surface, the thread axis of which coincides with the thread axis R of the piston rod 15.
- a stop member 27 a engages a stop member 27 a.
- the stop member 27 is guided linearly movable parallel to the threaded axis R, in the exemplary embodiment in an axial groove on the inner circumferential surface of the housing part 4.
- the locking member 24 forms for the stop member 27 a rotational stop 24c, which the propulsion of the piston rod 15 causing drive movement of the clutch input member. 6 ' limited. It forms for the stop member 27 a further rotation stop 24d, which determines the distributable and adjustable maximum dose.
- the stop member 27 On the other side of the threaded axis R, the stop member 27, which can be seen in the view of FIG. 23, is arranged opposite another stop member 27, which in the same way with two further rotational stops 24c and 24d interacts.
- the thread 24d is double-acting.
- the stop members 27 simultaneously reach a stop against the respective associated rotational stops 24c and 24d, as can be seen in the cross-sectional view of FIG. 23 for the rotational stops 24c.
- the rotational stops 24c determine a zero dose position and the rotational stops 24d a maximum dose position.
- the holding device is formed in the third embodiment in a third variant. It comprises a return member 19, further the indicator coupling member 23 and the locking member 24.
- the return member 19 is supported in the direction of the coupling movement X on the display coupling member 23 on the housing part 4 and against the direction of the coupling movement X on the locking member 24.
- the return member 19 pushes the locking member 24 against abutment against the connecting part 33.
- the locking member 24 is a sleeve member having an outer jacket forming the thread 24b, an inner jacket serving to secure against rotation on the coupling input member 6 ', and a bottom connecting the two shells to which the locking teeth 24a are formed. In the thus topfförniige locking member 24 projects the return member 19 and is supported on the bottom of the locking member 24 from.
- the return member 19 presses the locking member 24 not only against abutment against the connecting part 33, but also to a stop against the housing part 4. This further stop prevents the locking member 24 moves beyond the occupied in Figure 20 holding position out against the direction of the coupling movement X. can be.
- the locking member 24 is thus movable relative to the coupling input member 6 'against the restoring elasticity force of the return member 19 in the direction of the coupling movement X.
- the tensioned between the piston rod 15 and the connecting part 33 compensating spring 17 supports the return member 19 in its function to keep the clutch input member 6 'in the holding position.
- the compensating spring 17 could replace the return member 19 for the disengagement of the coupling members 6 ', T and 9 basically. However, it is preferably so weak that, at least after a partial relaxation, it can no longer hold the coupling members 6'-9 with sufficient certainty in the holding position and thus the clutch in the disengaged state.
- a trigger element 28 is provided for the triggering of the drive member 25, a trigger element 28 is provided.
- the triggering element 28 is rotatable relative to the housing part 4 in the direction of the coupling movement X, in the exemplary embodiment, the advancing direction V and the distal direction, translational and about the axis of rotation R of the coupling input member 6 ', which coincides in the embodiment with the threaded axis R of the piston rod 15 movable and is guided in these two movements of the housing part 4.
- the clutch engagement between the clutch input member 6 'and the intermediate clutch member T are established and the rotation lock between the locking members 24 and 34 is released and the drive member 25, i. the distribution, thereby triggered.
- the translational movement in the direction of advance V is therefore also referred to below as a release movement.
- the trigger element 28 forms the dosing member of the third embodiment in a further function.
- the product dose which can be released with the next discharge operation is set via several intermediate links. This movement is also referred to below as dosing. From the zero-dose position, which is shown in FIG. 20 and determined by abutment of the stop members 27 on the rotational stops 29c of the blocking member 24 delimiting the drive movement of the clutch input member 6 ', the dose can be determined by turning the trigger member 28 in the direction of the drawn direction of rotation arrow, the dosing, are set.
- the rotary dosing movement of the trigger element 28 is transmitted via an inner part 29, which is rotationally and non-displaceably connected to the trigger element 28 or integrally formed therewith, and the connecting part 33 is transmitted to the clutch input member 6 '.
- the inner part 29 and the connecting part 33 with each other in a rotationally secured engagement, and the connecting part 33 is connected to the clutch input member 6 'secured against rotation.
- the inner part 29 and the connecting part 33 are provided with an internal toothing 29a and an external toothing 33a, which engage in one another in the resting state of the device and are axially displaceable against each other.
- the triggering element 28 is arranged in a user-friendly manner in the proximal end region of the housing part 4. Its outer sleeve part surrounds the housing part 4. A bottom of the trigger element 28 forms a proximal end of the injection device.
- the trigger element 28 can be operated like a rotary knob and has a corrugation on its outer lateral surface for this purpose.
- it can be operated like a push-button.
- the triggering element 28 locks the dose units correspondingly in discrete rotational angle positions with the housing part 4.
- a stop element 29b projects toward a proximal end face of the connecting part 33 facing radially inwards.
- a clearance which is just so large that during the triggering movement of the trigger element 28, the rotation between the inner part 29 and the connecting part 33 dissolves before the stop element 29 b, the relative movement of the Trigger element 28 terminates relative to the connecting part 33 by stop contact.
- the second locking member 34 is tensioned by means of a locking spring 31 in the locking engagement with the locking member 24.
- the locking spring 31 is supported for this purpose in the direction of the coupling movement X on the locking member 34 and the coupling movement X against a housing part 30 from which is firmly connected to the housing part 4.
- An arranged between the rear part 29 and the locking member 34 further spring 32 biases the Trigger member 28 relative to the locking member 34 in a proximal end position.
- the locking member 34 is guided axially secured by the housing part 4 against rotation.
- the housing part 4 forms for the mobility of the locking member 34 has a distal and a proximal stop.
- the user adjusts the dose by rotating the trigger element 28 in the metering direction.
- the trigger element 28 takes in this rotary dosing over the rotation 29a, 33a, the connecting part 33, which in turn carries the clutch input member 6 ', which thus performs the same rotational dosing movement as the trigger element 28.
- the drive member 25 is tensioned.
- the stop member 27, in engagement with the thread 24b of the locking member 24, moves from the zero dose limiting stop 24c of the thread 24b toward the maximum dose determining stop 24d ( Figure 24).
- the injection device also provides a convenient way of dose correction, as will be apparent from the comparison of FIGS. 20 and 22. If the user has inadvertently set too high a dose, he can correct the dose by turning back the clutch input member 6 '. For the dose correction, he pulls the trigger element 28 in the proximal direction. This release movement of the trigger element 28 is indicated in Figure 22 by an arrow, as well as the direction of rotation for the correction. The inner part 29 and the locking member 34 are in the resting state of the device with respect to a movement in the proximal direction in a driving engagement. The corresponding drivers are designated 29c and 34a.
- the driver 29c formed by the inner part 29 and the driver 34a formed by the locking member 34 engage behind each other and form an entanglement for the disengagement movement of the trigger element 28.
- the locking member 34 is also moved against the force of the locking spring 31 in the proximal direction and thereby releases from the locking engagement with the locking member 24 which is against the housing part 4 to stop.
- the rotation lock is released, the user can by means of a reverse rotation of the trigger element 28 and the still existing twist-locked engagement of the inner part 29 with the connecting part 33 the Correct the dose.
- the device After setting the desired dose, the device is placed on the skin at the desired site of administration and the injection needle is inserted.
- the trigger element 28 takes over for the insertion of the needle another function, for which it is coupled to the needle guard 39 ( Figure 19).
- a first phase of puncturing the user presses the injection device against the skin so that the needle guard 39 moves in the distal direction relative to the housing part 38.
- the injection needle is not yet exposed, its tip is still behind the needle guard 39 back.
- the needle guard 39 comes in this first phase of the piercing action to stop against a resistive element, so that it can not move relative to the housing part 38 in the distal direction.
- the trigger element 28 With pressure still applied to the injection device towards the skin, the user presses the trigger element 28 in the proximal direction.
- the trigger element 28 releases a stop contact between the needle guard 39 and the resistance element, so that the injection device and thus the injection needle are moved relative to the needle guard 39 in the direction of the skin and punctures the injection needle.
- the patent application filed by the Applicant on the same filing date refers to "Attachment Module for an Injection Device with an Intervention Control for a Needle Masking Element".
- the trigger element 28 and thus the L ⁇ nenteil 29 is pressed against the pressure of the spring 32 relative to the connecting member 33 further in the distal direction, so that the rotation 29a , 33a dissolves.
- the trigger element 28 can rotate empty.
- the stop element 29b comes into abutting contact with the connecting part 33.
- the tripping element 28 presses the connecting element 33 via the stop element 29b and thus the coupling input element 6 'in the direction of Coupling movement X, in the exemplary embodiment in the advancing direction V.
- FIG. 21 shows the injection device for the case of setting a zero dose or a low priming dose in the engaged state after the release of the rotation lock 24, 34, ie after the trigger element 28 has completed the release movement.
- the triggering sequence described above takes place automatically in an advantageously continuously applied to the triggering element 28 pressure, from plunging to the complete distribution of the set dose.
- Figure 23 shows the injection device after emptying of the container 2.
- the housing part 1 has already been removed from the housing part 4.
- the piston rod 15 assumes its most distal position.
- the decoupling member 11 ' blocks the coupling input member 6' in the position withdrawn from the intermediate coupling member 7 '.
- the operation of the decoupling member 11 ' corresponds to that in the other exemplary embodiments.
- the housing part 1 and the decoupling member 11 ' are not directly in a guiding engagement with each other, but via an adapter structure 36.
- the adapter structure 36 is a sleeve in the housing part 4 in which cut off from in and against the Direction of the coupling movement X is fixed, but can rotate about the central longitudinal axis R of the housing part 4.
- the adapter structure 35 forms a guide curve 36a either as a recess or aperture in its jacket surface facing the decoupling member 11 '.
- the guide curve 35a has the course of a threaded portion. The measured over the circumference length and the measured with respect to the central longitudinal axis of the housing part 4 slope of the guide curve 35a are dimensioned so that at a quarter to half turn of the adapter structure 35 relative to the decoupling member 11 'this in the decoupling position shown in Figure 21 is moved.
- the decoupling member I V engages with its engagement element 12 in the guide cam 35a.
- the adapter structure 35 forms in the connection of the housing parts 1 and 4, a linear guide for the housing part 1.
- the housing part 1 is inserted into the adapter structure 35, wherein preferably a slight frictional engagement and, accordingly, a sliding guide for the housing part 1.
- the housing part 1 is relative to the Adapter structure 35 about the central longitudinal axis of the housing part 4 is not rotatable. The correspondingly rotationally secured engagement is produced at the beginning of the insertion of the housing part 1 into the adapter structure 35.
- the housing part 1 After the housing part 1 has been pushed in abutment against the housing part 4, namely its coupling receptacle at 4a, the housing part 1 is rotated relative to the housing part 4 and takes in this rotational movement the adapter structure 36, until the engagement element 12 of the decoupling member 11 ' at the end of the guide cam 36a comes to a stop.
- the rotational movement of the housing part 1 is preferably possible only in its axial stop position, for which an effective against rotation into the stop position against rotation between the housing parts 1 and 4 may be formed.
- the movement in the guide engagement of the decoupling member 11 ' has an axial length which is greater than the length X of the complete coupling movement.
- the locking member 34 is also taken against the force of the locking spring 31 and moved out of the locking engagement.
- the locking member 24 can not follow the locking member 34, since it is against the housing part 4 to stop.
- the dose display 20 "of the distributed dose is reset accordingly. If the set dose has not been distributed once because, for example, the injection process was interrupted or the container 2 is not the set dose completely more contained, the user can read this on the only partially reset in this case dose display 20 ".
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007548657A JP4659837B2 (ja) | 2004-12-31 | 2005-11-30 | ねじりばね駆動体を備える流体製剤の投薬分を投与する装置 |
AU2005321733A AU2005321733B2 (en) | 2004-12-31 | 2005-11-30 | Device for the dosed administration of a fluid product comprising a torsion spring drive |
EP05804303.5A EP1833535B1 (de) | 2004-12-31 | 2005-11-30 | Vorrichtung zur dosierten verabreichung eines fluiden produkts mit drehfederantrieb |
CN2005800453852A CN101094699B (zh) | 2004-12-31 | 2005-11-30 | 包含扭簧驱动的用于流体制品的定量给药设备 |
US11/769,213 US7951113B2 (en) | 2004-12-31 | 2007-06-27 | Device for the dosed administration of a fluid product comprising a torsion spring drive |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004063647A DE102004063647A1 (de) | 2004-12-31 | 2004-12-31 | Vorrichtung zur dosierten Verabreichung eines fluiden Produkts mit Kupplung |
DE102004063644A DE102004063644A1 (de) | 2004-12-31 | 2004-12-31 | Vorrichtung zur dosierten Verabreichung eines fluiden Produkts mit Drehfederantrieb |
DE102004063648A DE102004063648A1 (de) | 2004-12-31 | 2004-12-31 | Injektions- oder Infusionsgerät mit Lebensdauer-Ermittlungseinrichtung |
DE102004063644.3 | 2004-12-31 | ||
DE102004063645A DE102004063645A1 (de) | 2004-12-31 | 2004-12-31 | Vorrichtung zur dosierten Verabreichung eines fluiden Produkts mit Entkopplung für einen Behältniswechsel |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/769,213 Continuation US7951113B2 (en) | 2004-12-31 | 2007-06-27 | Device for the dosed administration of a fluid product comprising a torsion spring drive |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006069456A1 true WO2006069456A1 (de) | 2006-07-06 |
Family
ID=40491053
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2005/000710 WO2006069454A1 (de) | 2004-12-31 | 2005-11-30 | Vorrichtung zur dosierten verabreichung eines fluiden produkts mit entkopplung für einen behältniswechsel |
PCT/CH2005/000712 WO2006069456A1 (de) | 2004-12-31 | 2005-11-30 | Vorrichtung zur dosierten verabreichung eines fluiden produkts mit drehfederantrieb |
PCT/CH2005/000713 WO2006069457A1 (de) | 2004-12-31 | 2005-11-30 | Vorrichtung zur dosierten verabreichung eines fluiden produkts mit kupplung |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CH2005/000710 WO2006069454A1 (de) | 2004-12-31 | 2005-11-30 | Vorrichtung zur dosierten verabreichung eines fluiden produkts mit entkopplung für einen behältniswechsel |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2005/000713 WO2006069457A1 (de) | 2004-12-31 | 2005-11-30 | Vorrichtung zur dosierten verabreichung eines fluiden produkts mit kupplung |
Country Status (8)
Country | Link |
---|---|
US (7) | US20060153693A1 (de) |
EP (5) | EP1833533A1 (de) |
JP (2) | JP4709853B2 (de) |
CN (3) | CN101094700B (de) |
AU (3) | AU2005321734B2 (de) |
DE (4) | DE102004063648A1 (de) |
PL (1) | PL1833536T3 (de) |
WO (3) | WO2006069454A1 (de) |
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2004
- 2004-12-31 DE DE102004063648A patent/DE102004063648A1/de not_active Withdrawn
- 2004-12-31 DE DE102004063645A patent/DE102004063645A1/de not_active Withdrawn
- 2004-12-31 DE DE102004063647A patent/DE102004063647A1/de not_active Withdrawn
- 2004-12-31 DE DE102004063644A patent/DE102004063644A1/de not_active Ceased
-
2005
- 2005-11-30 CN CN2005800455608A patent/CN101094700B/zh active Active
- 2005-11-30 EP EP05804205A patent/EP1833533A1/de not_active Withdrawn
- 2005-11-30 EP EP19187017.9A patent/EP3590569B1/de active Active
- 2005-11-30 AU AU2005321734A patent/AU2005321734B2/en active Active
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- 2005-11-30 CN CN2005800453852A patent/CN101094699B/zh active Active
- 2005-11-30 CN CN2005800456013A patent/CN101094701B/zh not_active Expired - Fee Related
- 2005-11-30 AU AU2005321731A patent/AU2005321731B2/en not_active Ceased
- 2005-11-30 PL PL05804308T patent/PL1833536T3/pl unknown
- 2005-11-30 WO PCT/CH2005/000710 patent/WO2006069454A1/de active Application Filing
- 2005-11-30 AU AU2005321733A patent/AU2005321733B2/en active Active
- 2005-11-30 WO PCT/CH2005/000712 patent/WO2006069456A1/de active Application Filing
- 2005-11-30 WO PCT/CH2005/000713 patent/WO2006069457A1/de active Application Filing
- 2005-12-22 US US11/316,208 patent/US20060153693A1/en not_active Abandoned
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2006
- 2006-01-04 JP JP2006000048A patent/JP2006187628A/ja active Pending
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- 2007-06-27 US US11/769,194 patent/US8409148B2/en active Active
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- 2007-06-27 US US11/769,496 patent/US7976494B2/en not_active Expired - Fee Related
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- 2011-07-08 US US13/178,893 patent/US9057369B2/en active Active
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WO2008000827A1 (en) * | 2006-06-30 | 2008-01-03 | Novo Nordisk A/S | A medical delivery system comprising a coding mechanism |
US8632506B2 (en) | 2006-06-30 | 2014-01-21 | Novo Nordisk A/S | Medical delivery system comprising a coding mechanism |
US8613731B2 (en) | 2006-07-15 | 2013-12-24 | Novo Nordisk A/S | Medical delivery system with asymmetrical coding means |
US8708972B2 (en) | 2006-07-15 | 2014-04-29 | Novo Nordisk A/S | Medical delivery system with a rotatable coding element |
US9050397B2 (en) | 2006-07-15 | 2015-06-09 | Novo Nordisk A/S | Medical delivery system with a rotatable coding element |
JP2010503434A (ja) * | 2006-09-15 | 2010-02-04 | テクファーマ・ライセンシング・アクチェンゲゼルシャフト | いくつかの連結機構を有する注射装置 |
US9289558B2 (en) | 2006-11-21 | 2016-03-22 | Novo Nordisk A/S | Medical delivery system comprising locking ring with L-shaped grooves |
US8740857B2 (en) | 2006-12-21 | 2014-06-03 | Novo Nordisk A/S | Syringe device |
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