WO2006070561A1

WO2006070561A1 - Instrument for inserting intraocular lens

Info

Publication number: WO2006070561A1
Application number: PCT/JP2005/022278
Authority: WO
Inventors: Takashi Ichinohe; Kazunori Kudoh
Original assignee: Hoya Corporation
Priority date: 2004-12-28
Filing date: 2005-12-05
Publication date: 2006-07-06
Also published as: JP4766442B2; JP2006181269A

Abstract

An instrument for inserting an intraocular lens in which the push-out operation of a lens can be carried out more simply and safely, and the lens can be held in safety without causing an erroneous operation when it is not used. A lens arranging section (3) has a lock mechanism (21) for securing a lens (2). The lock mechanism (21) consists of a holding member (22) provided on the periphery of the lens, and a member (23) for supporting the holding member (22). The supporting member (23) is provided at the lens arranging section (3) so as to be deformable elastically, and a lens push-out mechanism (6) deforms the lock mechanism (21) by the operation for pushing out the lens (2).

Description

Specification

Intraocular lens insertion device

Technical field

The present invention relates to an instrument for inserting an intraocular lens used for inserting an intraocular lens into aphakic eye after cataract surgery, or an intraocular lens for use in a refractive lens in refractive surgery. It relates to an intraocular lens insertion device used for insertion.

Background art

In cataract surgery, removal of the turbid lens by ultrasonic emulsifying suction (PEA) and implantation of an intraocular lens into the eye after removal of the lens are widely performed. There are two types of intraocular lenses: a hard intraocular lens whose optical part is made of a hard material such as PMMA, and a soft intraocular lens which also has a soft material such as silicone elastomer and soft acrylic. When using a hard intraocular lens, an incisional wound with almost the same width as the diameter of the optical part must be made in the cornea or sclera and the lens must be inserted, while a soft intraocular lens is used. In this case, the optical part can be inserted from an incision smaller than the diameter of the optical part by folding it. In order to reduce post-operative corneal astigmatism and infections, soft intraocular lenses now tend to be preferred, as lenses are preferred to be inserted through small incisions. Also, in order to put the lens into the eye, a dedicated injector having a structure for introducing the lens into the eye through the elongated tube may be used. By using such an intraocular lens-specific indicator, it is possible to insert the lens through an incision wound smaller than 3 mm.

[0003] More recently, in order to eliminate the possibility of bacterial contamination during lens handling and the possibility of erroneous operation during lens handling, a pre-set type injector with lens pre-set in the injector has been introduced. It is done. In the preset type injector, the fixed state force of the lens at the time of shipment is transferred to the operating state of the lens at the time of use. Some have a lens moving mechanism for moving to a position (for example, Patent Documents 1 and 2). In addition, as a method for stably installing the lens in the intraocular lens insertion device, An intraocular lens insertion device that holds the lens without force and which pushes the lens by means of a plunger coaxial with the lens is disclosed (eg, Patent Document 3).

Patent Document 1: Japanese Patent Application Laid-Open No. 2003-325570

Patent Document 2: Japanese Patent Application Laid-Open No. 2003-325572

Patent Document 3: Japanese Patent Application Publication No. 09-506285

Disclosure of the invention

Problem that invention tries to solve

However, even in the above Patent Documents 1 and 2, the special mechanism for moving the lens to the position where the holding position force can also be pushed out is required, and the mechanism of the whole system is complicated, and the lens moving mechanism is erroneous. There was a concern that the lens would not be pushed out properly by actuation. Furthermore, also in Patent Document 3 described above, the insertion device does not have a locking mechanism for fixing the lens, which may cause the plunger to be pushed in erroneously, which is suitable for a preset type injector. , There was a problem.

Therefore, it is necessary to provide a function of fixing the lens in order to maintain the unused state in a preset type of inverter in which the lens is set in advance in the injector. However, when such a lens fixing function is provided, it can not be easily pushed out during use, so some means for releasing the lens fixing state is required. However, having the function of moving the lens in a fixed position to a position that can be pushed out in use complicates the configuration of the entire system, and may cause malfunction when moving the lens to a position that can be pushed out.

In view of the above-described problems, the present invention is capable of pushing the lens more easily and safely, and for holding the lens safely without causing erroneous operation when not in use. The purpose is to provide the device.

Means to solve the problem

[0007] In order to achieve the above object, the invention according to claim 1 relates to a main body comprising a lens arrangement portion on which a lens is installed and a tube portion for introducing a lens, and a lens installed on the lens installation portion An intraocular lens inserting device having a lens pushing mechanism for pushing out the The installation portion has a lock mechanism for fixing the lens, and the lock mechanism is configured to be released by moving or deforming the lock mechanism or the lens, and the lock mechanism is coaxial with the lens pushing mechanism. It is characterized in that it is configured to fix the lens.

The invention according to claim 2 is characterized in that the hook mechanism is released by moving the lens pushing mechanism in the lens direction.

[0009] The invention according to claim 3 is characterized in that the locking mechanism is provided so as to be movable or deformable in a direction substantially perpendicular to the advancing axis of the lens pushed out by the lens pushing mechanism. Do.

[0010] The invention according to claim 4 is characterized in that the lock mechanism comprises a holding member provided around the lens and holding the lens, and a support member supporting the holding member.

[0011] The invention according to claim 5 is characterized in that the lock mechanism is detachably provided in the lens installation portion.

[0012] The invention according to claim 6 is characterized in that the locking mechanism includes a hooking means for hooking and fixing the lens pushing mechanism in a state where the lens pushing mechanism is in contact with the lens. To be a reward.

Further, in the invention according to claim 7, the cylindrical portion is detachably provided with a cap member for protecting the tip of the cylindrical portion, and the cap member is provided with a fixed shaft member for fixing a lens. It is characterized by

The invention according to claim 8 is characterized in that the support member is constituted by a tab which can be separated from the main body.

[0015] The invention according to claim 9 is characterized in that the lock mechanism is configured to hold a lens by forming a gap between the lens installation portion and the lens.

In the invention according to claim 10, the support member is elastically deformable on the lens installation portion, and the lens pushing mechanism is configured to deform the lock mechanism by an operation of pushing the lens. It is characterized by having done.

[0017] In the invention according to claim 11, the lens pushing mechanism comprises a plunger for pushing out the lens and a slider having a lens contact portion larger than the plunger, The rider is characterized in that the lock mechanism is deformed by an operation of pushing the lens.

The invention according to claim 12 is characterized in that the plunger and the slider interlock with each other to push the lens.

Effect of the invention

According to the intraocular lens inserting instrument according to claim 1 of the present invention, since the locking mechanism or the lens can be released by moving or deforming, the lens pressing operation can be performed easily and safely. it can. In addition, the lens can be held safely by the lock mechanism when not in use. Furthermore, since the locking mechanism is configured to fix the lens coaxially with the lens pushing mechanism, the configuration is simple and malfunction can be prevented.

[0020] According to the intraocular lens inserting instrument according to claim 2, the locking mechanism can be released by a series of operations for pushing out the lens, so that the device can be operated more easily.

[0021] According to the intraocular lens inserting instrument described in claim 3, the locking mechanism is reliably released by movably or deformablely provided in a direction substantially perpendicular to the advancing axis of the lens. The lens can be pushed out more easily and safely.

Further, according to the intraocular lens inserting instrument described in claim 4, the lens can be held with a simple configuration, and the lock mechanism can be reliably released, so that malfunction can be prevented.

Further, according to the instrument for inserting an intraocular lens according to the fifth aspect, since the lock mechanism can be released with a simple configuration, the lens can be easily pushed out.

Further, according to the intraocular lens inserting instrument according to the sixth aspect, the lens push-out mechanism also has a function of holding the lens, so the configuration can be simplified and the operation can be easily performed.

Further, according to the intraocular lens inserting instrument described in claim 7, the tip of the main body is protected by the cap member provided with the fixed shaft member, so that the lens can be reliably prevented from jumping out. In addition, the tip can be protected from the adhesion of foreign matter.

Further, according to the device for inserting an intraocular lens according to the eighth aspect, since the hook mechanism can be released simply by separating the tab, the operation can be performed more easily.

[0027] In addition, according to the intraocular lens inserting device of the ninth aspect, the lens can not be used for the first time. Since it abuts on the inner surface of the lens installation portion, the lens can be prevented from coming into close contact with the inner surface of the lens installation portion, and the lens can be easily pushed out.

Further, according to the intraocular lens inserting instrument described in claim 10, since the lock mechanism can be released by the operation of pushing the lens, the operation can be performed easily. In addition, since it is possible to prevent forgetting to be released reliably, usability can be further improved.

Further, according to the intraocular lens inserting instrument according to claim 11, since the lock mechanism is released by the slider and the initial operation of deforming the lens is performed, the lens is brought into contact with the lens by surface contact. In addition to being able to perform initial operation smoothly without applying local stress, it is possible to prevent lens deformation.

[0030] Further, according to the intraocular lens inserting device according to claim 12, since the slider can be operated by the operation of pushing out the plunger, from the initial operation by the slider until the lens is pushed out by the plunger. A series of actions can be performed more smoothly

Brief description of the drawings

FIG. 1 is an overall perspective view showing a configuration of an intraocular lens inserting instrument according to a first embodiment of the present invention.

[FIG. 2] Same as above, is a perspective view showing the configuration of the installation unit.

[FIG. 3] is a perspective view showing a state in which the cover member is mounted.

[FIG. 4] Same as above, is a cross-sectional view showing the installation portion, (a) a cross-sectional view showing a state before pushing out the lens, (b) a longitudinal cross-sectional view showing a state where the slider has reached an inclined surface, FIG. 7 is a longitudinal sectional view showing a state in which the lock mechanism is deformed and the lock is released.

[FIG. 5] Same as above, is a cross-sectional view showing a modification, (a) a state in which the plunger can move independently, (b) a state in which the plunger and the slider can move in an interlocking manner. is there.

[FIG. 6] A plan view showing another modification as in the above, showing (a) the lens held by the lock mechanism and (b) the lock mechanism released by the lens push-out mechanism. .

FIG. 7 is a perspective view showing the configuration of an intraocular lens inserting instrument according to a second embodiment of the present invention.

[FIG. 8] Same as above, is a cross-sectional view. FIG. 9 is a plan view showing the configuration of an intraocular lens inserting instrument according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing the configuration of the hooking member.

[FIG. 11] Same as above, is a cross-sectional view.

FIG. 12 is a perspective view showing a configuration of an intraocular lens inserting instrument according to a fourth embodiment of the present invention.

[FIG. 13] Same as above, is a cross-sectional view.

[FIG. 14] Same as above, but is a longitudinal sectional view showing a modification.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Example 1

First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. The intraocular lens insertion instrument 1 shown in FIG. 1 is used to safely and rapidly deliver a deformable intraocular lens 2 (hereinafter referred to as a lens 2) into the eye. Is a preset type intraocular lens insertion device preset in the intraocular lens insertion device. Specifically, a lens push-out mechanism 6 for pushing out the lens 2 installed in the lens installation unit 3 and a main body 5 comprising a lens installation unit 3 for installing the lens 2 and a cylinder unit 4 for inserting the lens 2 into the eye. With and. The lens 2 includes an optical unit 2a and a loop 2b.

The main body 5 is composed of a main body distal end portion 7 formed of a cylindrical member and a main body proximal end portion 8, and various materials can be used, and for example, a metal such as stainless steel or titanium is used. Can.

The main body distal end portion 7 is pushed out by the lens mounting portion 3, the cylindrical portion 4, a tapered portion 9 connecting the lens mounting portion 3 and the cylindrical portion 4, and the lens pushing mechanism 6. A notch groove 10 formed on the left and right in parallel with the lens advancing axis A, which is the advancing axis of the lens 2, and a stop 11 engaged with the main body end 8 of the main body.

The main body proximal end portion 8 is loosely fitted from the proximal end side of the main body distal end portion 7 to the main body distal end portion 7 to configure the main body 5, and a grip receiving portion 12 engaged with the stock bar 11; And 13 are provided.

As shown in FIG. 2, the lens installation portion 3 has an opening 20 opened upward, and the opening 20. 20 and a lock mechanism 21 for fixing the lens 2 inserted. The lock mechanism 21 holds the lens 2 in a state where no load is applied to the lens 2 and the lens 2 is not deformed, and further has a function of preventing the lens 2 from jumping out due to an operation error. The lock mechanism 21 comprises a holding member 22 provided around the lens 2 and a support member 23 for supporting the holding member 22. The lens 2 is fixed coaxially with the lens pushing mechanism 6, that is, on the lens advancing axis A.

The holding member 22 is constituted by a front holding portion 22a and a rear holding portion 22b which are erected at an interval substantially the same as the diameter of the lens 2 in the front-rear direction of the lens advancing axis A. . The holding member 22 is supported by the support member 23 and integrally connected.

The support member 23 is provided on the surface of the lens installation portion 3 facing the opening 20 and is provided so as to be elastically deformable at the fulcrum portion B. The rear holding portion 22b is physically provided with an inclined surface 24 which rises toward the front of the lens advancing axis A.

The lens pushing mechanism 6 comprises a plunger 25 for inserting the lens 2 into the eye, and a slider 26 for performing an initial operation for inserting the lens 2.

The slider 26 is provided on an abutment portion 27 which abuts the lens 2 with a larger area than the plunger 25, a guide groove 28 for supporting the plunger 25 along the lens advancing axis A, and a main body 5. It comprises a wing portion 29 engaged with the notched groove 10 and supporting the slider 26 along the lens advancing axis A, and a grip portion 30 for pushing and returning the slider 26.

The contact portion 27 is constituted by a part of a circular arc having a radius of curvature substantially the same as the outer diameter of the lens 2, and applies local stress to the lens 2 by surface contact with the lens 2. Instead, it is configured to be able to perform the initial operation smoothly.

The guide groove 28 is formed in substantially the same shape as the outer shape of the plunger 25 in parallel to the lens advancing axis A.

The plunger 25 is disposed so as to be slidable in the guide groove 28 and capable of projecting the tip of the plunger 25 from the contact portion 27. The guide groove 28 may be a through hole formed parallel to the lens advancing axis A.

The wing portion 29 holds the slider 26 substantially at the center of the main body 5 by engaging with the notch groove 10 and enables the slider 26 to move along the lens advancing axis A. . did Therefore, the plunger 25 is held at the center of the main body 5 and can be moved along the lens advancing axis A by the guide groove 28. The movement of the slider 26 is easily performed by the grip portion 30.

The cylindrical portion 4 is provided at the tip of the main body 5 continuously to the lens installation portion 3, and the outer diameter of the cylindrical portion 4 is formed to be substantially the same as the diameter of the incision. The cylindrical portion 4 and the lens mounting portion 3 are connected to the tip by a tapered portion 9 which is gradually reduced in diameter toward the tip. The lens 2 is pushed out by the lens pushing mechanism 6 and is folded when passing through the tapered portion 9.

As shown in FIG. 3, the main body 5 is detachably provided with a cover member 31 for closing the opening 20. The cover member 31 has a substantially U-shaped cross section, and is attached to the main body 5 from the side, and the opening side of the cover member 31 is fixed to the main body by fixing means 32.

[0048] Next, an assembly procedure of the intraocular lens insertion device 1 configured as described above will be described. The wing portion 29 of the slider 26 is engaged with the notch groove 10 of the main body distal end portion 7 and the slider 26 is inserted into the main body distal end portion 7 from the proximal end side. Next, loosely insert the base end 8 of the main body from the base end of the tip 7 of the main body. At the same time, while pushing the slider 26 at the body proximal end 8, the body proximal end 8 is pushed until the stopper 11 formed on the body distal end 7 engages with the stopper receiving portion 12 provided at the body proximal end 8. Thus, the slider 26 is attached to the main body 5. Further, the plunger 25 is inserted into the guide groove 28 formed in the slider 26 to assemble the intraocular lens insertion device 1.

Next, the operation of the above configuration will be described. First, the lens 2 is installed on the main body 5. That is, the lens 2 is inserted into the lens mounting portion 3 from the opening 20 and placed between the front holding portion 22a and the rear holding portion 22b (FIG. 4 (a)). In order to keep the lens 2 placed in a sterile condition, the opening 20 is closed by a cover member 31 and sealed as shown in FIG. Thus, the lens 2 can be installed on the main body 5. Then, the grip unit 30 is operated to move the slider 26 forward along the lens advancing axis A. When the slider 26 is moved forward, the abutment portion 27 reaches the inclined surface 24 (Fig. 4 (b)). When the contact portion 27 reaches the inclined surface 24, the resistance generated on the slider 26 is increased. When the slider 26 is moved further forward against the resistance, the slider 26 pushes down the inclined surface 24 (Fig. 4 (c)). When the slider 26 depresses the inclined surface 24, the support member 23 elastically deforms downward about the fulcrum B (see FIG. c) ₀ ) When the support member 23 is elastically deformed downward, the holding member 22 is released downward, which is a direction substantially perpendicular to the lens advancing axis A. When the holding member 22 is released downward, the abutment portion 27 abuts on the lens 2. When the contact portion 27 contacts the lens 2, the lens 2 is pushed out. The slider 26 pushes the lens 2 until the abutment 27 reaches the taper 9. When the lens 2 is pushed out, the lens 2 is folded by the taper portion 9 and the lens 2 reaches the tube portion 4. The lens 2 that has reached the barrel 4 can be inserted into the eye in a folded state by pushing it out with the plunger 25.

With the above-described configuration, when the lens 2 is not in use, the lens 2 can be held without being deformed and not deformed. Furthermore, when the slider 26 is moved, when the slider 26 reaches the inclined surface 24, the resistance of the slider 26 is increased, so that erroneous operation can be prevented. Since the lock mechanism 21 can be released simply by moving the slider 26 against the resisting force generated by the inclined surface 24 during use, the lens 2 can be inserted with a simple configuration and operation. In addition, after the lens 2 is installed, it can be switched to the use state while maintaining the sealed state, so that contamination by bacteria can be prevented and high hygiene can be maintained.

As described above, the intraocular lens insertion device 1 according to the present embodiment includes the main body 5 including the lens installation portion 3 on which the lens 2 is installed and the tube portion 4 for introducing the lens, and the lens installation In the intraocular lens insertion device 1 provided with the lens push-out mechanism 6 for pushing out the lens 2 installed in the part 3, the lens installation part 3 has a lock mechanism 21 for fixing the lens 2, and the lock Since the mechanism 21 is configured to be released by moving or deforming the lock mechanism 21 or the lens 2, the lens can be released by moving or deforming the lock mechanism 21 or the lens 2, and the lens can be released more easily and safely. The second extrusion operation can be performed. Also, when not in use, the locking mechanism 21 can hold the lens 2 safely without causing a malfunction.

In addition, since the lock mechanism 21 is released by moving the lens push-out mechanism 6 in the lens direction, the lock mechanism 21 can be released by a series of operations for pushing out the lens 2, so the operation is easier. it can.

In addition, since the lock mechanism 21 is provided so as to be movable or deformable in a substantially perpendicular direction with respect to the lens advancing axis A pushed out by the lens pushing mechanism 6, the lock machine 21 can be reliably locked. Since the lens can be released, the lens 2 can be pushed out more easily and safely.

Further, since the lock mechanism 21 includes the holding member 22 provided around the lens 2 for holding the lens 2 and the support member 23 for supporting the holding member 22, the lens 2 is configured with a simple configuration. Since the lock mechanism 21 can be reliably released as well as held, erroneous operation can be prevented.

Further, since the support member 23 is provided on the lens installation portion 3 so as to be elastically deformable, and the lens push-out mechanism 6 is configured to deform the lock mechanism 21 by an operation of pushing out the lens 2, the operation is performed Can be done easily. In addition, since it is possible to reliably prevent forgetting to release, usability can be further improved.

Further, the lens pushing mechanism 6 has a plunger 25 for pushing the lens 2 and a slider 26 which has a lens contact portion 27 larger than the plunger 25 and performs an initial operation for inserting the lens 2 and the like. The slider 26 deforms the lock mechanism 21 by pushing out the lens 2, and by making surface contact with the lens 2, it is possible to perform initial movement in a smooth manner that does not give local stress to the lens 2. The deformation of the lens 2 can be prevented.

Next, a modified example of the lens pushing mechanism 6 in the above configuration will be described. The lens push-out mechanism 6 according to the present modification includes a plunger 25 and a slider 26. The plunger 25 and the slider 26 are provided so as to be interlocked with each other. The plunger 25 is disposed movably in the longitudinal direction of the lens advancing axis A in the guide groove 28. Recesses 25 a are formed on the circumference of the plunger 25. The slider 26 is provided with a guide groove 28 provided along the advancing axis of the lens 2 and a convex portion 28 a in the guide groove 28 to be engaged with the concave portion 25 a.

The plunger 25 for explaining the operation of the lens pushing mechanism 6 configured as described above is movable independently until the recess 25a engages with the protrusion 28a (FIG. 5 (a)). When the plunger 25 is moved forward, the recess 25a engages with the protrusion 28a. When the recess 25a engages with the protrusion 28a, the slider 26 interlocks with the plunger 25 to move forward (FIG. 5 (b)). When the slider 26 moves forward with the plunger 25, the abutment portion 27 reaches the inclined surface 24. When the contact portion 27 reaches the inclined surface 24, the slider 26 pushes down the inclined surface 24. When the slider 26 depresses the inclined surface 24, the holding member 22 is released downward. Holding member 22 is When released downward, the contact portion 27 contacts the lens 2. When the contact portion 27 contacts the lens 2, the lens 2 is pushed out. When the lens 2 is pushed out, the lens 2 is folded by the tapered portion 9 and the lens 2 reaches the tube portion 4. At this time, the slider 26 abuts against the tapered portion 9 and is restrained. When the slider 26 abuts on the tapered portion 9, the recess 25a is disengaged from the convex portion 28a so that the slider 26 and the plunger 25 are disengaged, and the plunger 25 can move alone. When the plunger 25 is moved forward, the lens 2 is moved from the tapered portion 9 to the cylindrical portion 4 and pushed out of the main body 5.

With this configuration, the operator can perform the initial operation of deforming the lens 2 smoothly with the slider 26 simply by moving the plunger 25 forward, and the operation can be performed more easily. , Can prevent operation mistakes. The convex portion 28 a and the concave portion 25 a have the shape and strength necessary for the plunger 25 and the slider 26 to be interlocked and to push down the support member 23, and the slider 26 reaches the tapered portion 9. It is desirable to have the flexibility to ensure that the engagement can be released without causing breakage.

As described above, the intraocular lens inserting instrument 1 according to the present embodiment pushes the lens 2 in conjunction with the plunger 25 and the slider 26 in force, and therefore, from the initial operation by the slider 26 The series of operations until the lens 2 is pushed out by the plunger 25 can be performed more smoothly.

Next, another modified example of the lens pushing mechanism 6 having the above-mentioned configuration will be described. The same reference numerals are given to the same components as those in the above embodiment, and the description will be omitted for the sake of simplicity.

The intraocular lens inserting instrument 1 in the present embodiment is configured such that the lens 2 is fixed by the lock mechanism 21 and the lock mechanism 21 can be released by an operation of moving the lens push-out mechanism 6 forward. .

The lock mechanism 21 has a holding member 22 provided symmetrically with respect to the lens advancing axis A, and a proximal end side of the holding member 22 so as to force the distal end thereof to narrow the passage of the plunger 25. And an inclined surface 24 provided on the The lock mechanism 21 holds the lens 2 upward from the plunger 25 at right angles to the lens advancing axis A, and is fixed to the inner side surface of the main body 5 so as to be elastically deformable at a supporting point not shown. The lens push-out mechanism 6 comprises a widened portion 35 which contacts the inclined surface 24 and pushes the holding member 22 left and right, and a plunger 25 which pushes out the lens 2. The widening portion 35 and the plunger 25 are integrally formed. The plunger 25 is positioned such that the tip end of the plunger 25 is located between the optical portion 2a of the lens 2 and the loop 2b, and abuts the lens 2 when the locking mechanism 21 is released by the widening portion 35. It is formed projecting from the widening portion 35.

Next, the operation of the above configuration will be described. With the lens 2 mounted on the lock mechanism 21, the lens pushing mechanism 6 is moved forward. When the lens pushing mechanism 6 is moved forward, the widening portion 35 abuts on the inclined surface 24. When the widening portion 35 abuts on the inclined surface 24, resistance against the force for moving the lens pushing mechanism 6 forward is added. When the lens pushing mechanism 6 is moved forward against the resistance, the widening section 35 pushes the inclined surface 24 left and right. When the widening section 35 pushes the inclined surface 24 laterally, the holding member 22 spreads laterally around the fulcrum. When the holding member 22 spreads to the left and right, the lock mechanism 21 is released, and the lens 2 becomes free. When the lens pushing mechanism 6 is further moved forward, the plunger 25 abuts on the lens 2 and the lens 2 can be pushed out.

With such a configuration, the lock mechanism 21 can be released only by the operation of moving the lens pushing mechanism 6 forward, and the lens 2 can be pushed out, so that the operation can be smoothly performed. Further, since the plunger 25 is formed to be positioned between the optical part 2a of the lens 2 and the loop 2b, the operation of pushing the lens 2 can prevent the loop 2b from being damaged.

The plunger 25 may be configured to be movable relative to the widening portion 35 in the front-rear direction. In this case, the widening portion 35 is provided with a contact portion 27 constituted by a part of a circular arc having a radius of curvature substantially the same as the outer diameter of the lens 2, and the lens 2 is locally The initial operation may be performed without any stress. Of course, the widening portion 35 and the plunger 25 may be installed in an interlockable manner.

Example 2

Next, a second embodiment of the present invention will be described with reference to FIG. 7 and FIG. The lock mechanism 21 according to the present embodiment also has a function of holding the lens 2 and fixing the lens push-out mechanism 6 at the same time. The lock mechanism 21 includes a holding member 22 for holding the lens 2, a fixing member 41 for fixing the slider 26, a cap member 42 for protecting the tip of the main body 5, and a support member for supporting these. And a handle 43 for removal.

The holding member 22 is composed of a front holding portion 22a material 22 and a rear holding portion 22b material 22 which are columnar or wall-like members provided upright around the lens 2. In particular, a wall-like member having a V ヽ surface area larger than the cross-sectional area of the plunger 25 is preferably used as the rear holding portion 22b in order to prevent the plunger 25 from jumping out due to operation error.

The slider 26 has a contact portion 27, a guide groove 28, a wing portion 29, a grip portion 30, a fixing hole 44 inserted in the fixing member 41, and a loop for the loop 2 b of the lens 2. A guide 45 is formed. The loop guide 45 fixes the lens 2 by the loop 2b of the lens 2 being latched.

As shown in FIG. 8, the through-hole into which the holding member 22 and the fixing member 41 are inserted is formed in the front end portion 7 of the main body. Further, an opening 20 is formed on the surface of the front end portion 7 to which the lock mechanism 21 is attached, and the opening 20 is provided with a cover 46 which can be opened and closed. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6

The procedure for installing the lens 2 in the intraocular lens insertion device 1 will be described. First, the lens 2 is inserted from the opening 20. Pass the loop 2b of the inserted lens 2 through the loop guide 45 and install the lens 2 on the lens setting part 3 (Fig. 8). After installing the lens 2, close the cover 46 and close the opening 20. After closing the opening 20, the force lock mechanism 21 is attached. That is, the lock mechanism 21 inserts the cap member 42 into the tip of the main body 5, inserts the holding member 22 into the through hole, and further inserts the fixing member 41 into the fixing hole from the through hole. It is attached. Thus, the lens 2 is held by the holding member 22 and the loop 2b is hooked to the loop guide 45, the slider 26 is held by the fixing member 41, and the rear holder 22b is held by the plunger 25. Since it can be fixed, it is possible to prevent the lens pushing mechanism 6 from jumping out due to an operation error. Since the tip is also protected by the cap member 42, contamination due to damage or adhesion of foreign matter can be prevented.

In use, the support member 23 is moved by lifting the handle 43. 5 can be removed. At the same time as the support member 23 is removed from the main body 5, the holding member 22 can be moved in a direction substantially perpendicular to the through hole force lens advancing axis A to release the lock and shift to the use state.

As described above, in the intraocular lens inserting instrument 1 according to the present embodiment, since the lock mechanism 21 is provided on the lens installation portion 3 so as to be freely removable, the lock mechanism 21 can be formed with a simple configuration. The lens 2 can be easily pushed out.

Further, since the lock mechanism 21 is provided with the hooking means 41 for hooking and fixing the lens push-out mechanism 6 in a state where the lens push-out mechanism 6 is in contact with the lens 2, the lens push-out mechanism 6 is Since the lens also has the function of holding the lens 2, the configuration can be simplified and the operation can be performed easily.

Example 3

Next, a third embodiment of the present invention will be described with reference to FIG. 9 to FIG.

The lock mechanism 21 according to the intraocular lens insertion device 1 shown in FIG. 9 includes a hooking means 51 for fixing the lens push-out mechanism 6 and a fixing shaft member 52 for fixing the lens 2 from the front.

As shown in FIG. 10, the hooking means 51 is composed of a projection 53 and a tab 54 which is a supporting member for supporting the projection 53. As shown in FIG. 11, this hooking means 51 is a lens push-out mechanism by inserting the projection 53 into the lock hole 55 provided in the lens push-out mechanism 6 through the through-hole formed in the main body 5. Hold 6 down. The lock hole 55 is formed in such a position that the end of the lens pushing mechanism 6 abuts on the rear of the lens 2 installed in the lens mounting portion 3. The tab 54 is detachably fixed to the outer shell of the main body 5.

The fixed shaft member 52 is integrally provided on a cap member 42 for protecting the tip of the main body 5 as shown in FIG. 11. The fixed shaft member 52 is inserted from the tip opening 5 a of the main body 5 and installed in the lens installation portion 3. It has a length that abuts on the front of the lens 2.

The body 5 has a guide hole 56 for holding the lens pushing mechanism 6 coaxially with the cylindrical portion 4, the lens installation portion 3 provided with the opening 20, the cylindrical portion 4, and the tapered portion 9. And the gripping portion 13. The opening 20 is provided with a cover 46 which can be opened and closed. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6.

Next, the procedure for installing the lens 2 in the intraocular lens insertion device 1 according to the present embodiment explain. The tab 54 is attached to the main body 5 in a state in which the protrusion 53 is fitted in the lock hole 55, and the locking means 51 fixes the lens pushing mechanism 6 to the main body 5. Further, the fixed shaft member 52 is inserted from the main body 5 distal end opening 5 a, the cap member 42 is fixed to the front end of the main body 5, and the fixed shaft member 52 is mounted on the main body 5. In this state, the lens 2 is inserted from the opening 20. The lens 2 is installed at a position where the rear of the inserted lens 2 abuts on the lens pushing mechanism 6 and the front abuts on the fixed shaft member 52. The cover 46 is then closed and the opening 20 is closed. Thus, the lens 2 can be fixed by the lens push-out mechanism 6 and the fixed shaft member 52 and the lens push-out mechanism 6 can be fixed by the hooking member. It can prevent jumping out. Since the tip is also protected by the cap member 42, contamination due to damage or adhesion of foreign matter can be prevented. Furthermore, since the lens push-out mechanism 6 also has the function of holding the rear of the lens 2, the configuration can be simplified.

Also, when in use, the tab 54 is detached and the projection 53 is inserted into and removed from the lock hole 55. At the same time, the fixed shaft member 52 is inserted into and removed from the cylindrical portion 4 by removing the cap member 42 from the end of the main body 5. Thus, by moving the lens push-out mechanism 6 forward, the lock mechanism 21 can be released to shift to the use state.

[0084] With the above configuration, the lens can not be pushed out unless the tab is separated, so that erroneous operation can be reliably prevented, and it is possible to easily shift to the use state simply by separating the tab. it can.

As described above, in the intraocular lens insertion device 1 according to the present embodiment, the cylindrical portion 4 is detachably provided with a cap member 42 for protecting the tip of the cylindrical portion 4, and the cap member 42 is Since the fixed shaft member 52 for fixing the lens 2 is provided, the tip end of the main body 5 can be protected by the cap member 42 provided with the fixed shaft member 52, and the lens 2 can be reliably prevented from coming out. In addition, the tip can be protected from the adhesion of foreign matter.

Further, since the support member 23 is constituted by the tab 54 which can be separated from the main body 5, the hook means 51 can be released simply by separating the tab 54 from the main body 5, and the operation can be performed more easily. You can

Example 4 Next, a fourth embodiment of the present invention will be described with reference to FIG. 12 and FIG. The intraocular lens inserting instrument 1 shown in FIG. 12 comprises a main body 5, a plunger 25 which is a lens pushing mechanism 6, and a locking mechanism 21.

The locking mechanism 21 restricts the forward movement of the lens pushing mechanism 6 and holds a lens, a holding member 22 for protecting the lens, a cap member 42 for protecting the tip of the main body 5, and the holding member 22. And a support member 23 for supporting the cap member 42. The holding member 22 includes a front holding portion 22a for fixing the front of the lens 2 and a rear holding portion 22b for fixing the rear of the lens 2. Further, the support member 23 is provided with an extendable and contractible portion 61 which can extend and contract in the length direction between the holding member 22 and the cap member 42.

As shown in FIG. 13, the main body 5 has a guide hole 56 for holding the lens pushing mechanism 6 coaxially with the cylindrical portion 4, a lens installation portion 3 having an opening 20, and the opening 20. It comprises a through hole which is provided in the thickness direction of the opposite surface and into which the holding member 22 of the lock mechanism 21 is inserted, a cylindrical portion 4, a tapered portion 9 and a grip portion 13. The opening 20 is formed on the side of the main body 5 to which the lock mechanism 21 is not attached. The opening 20 is provided with a cover 46 which can be opened and closed. At this time, the lens 2 is held coaxial with the lens pushing mechanism 6.

Next, the procedure for installing the lens 2 in the intraocular lens insertion device 1 according to the present embodiment will be described. The lock mechanism 21 inserts the holding member 22 into the through hole, and further covers the end of the cap member 42 on the end of the main body 5 and is mounted on the intraocular lens insertion instrument 1. At this time, since the stretchable portion 61 is provided between the holding member 22 and the cap member 42, the cap member 42 can be easily attached even after the holding member 22 is inserted. Next, insert the lens 2 from the opening 20. The inserted lens 2 is installed between the rear holding portion 22b and the front holding portion 22a. The cover 46 is then closed and the opening 20 is closed. By this, the lens 2 can be fixed by the holding member 22 and the lens pushing mechanism 6 can be fixed by the hook member, so that the lens pushing mechanism 6 can be prevented from coming out due to an operation error. Also, since the tip of the main body 5 is protected by the cap member 42, contamination due to damage or adhesion of foreign matter can be prevented.

In addition, at the time of use, the support member 23 is separated and the holding member 22 is also removed from the through hole. By this, the lock mechanism 21 is released, and at the same time, the cap member 42 is removed by the main body 5 tip force. And can shift to the use state.

With this configuration, since the lens 2 can not be pushed out unless the lock mechanism 21 is removed, it is possible to prevent an operation error and, at the same time, prevent the tip of the main body 5 from being contaminated by bacteria or the like. .

Next, a modification of the present embodiment will be described with reference to FIG. The lock mechanism 21 shown in FIG. 14 includes a holding member 22 for holding the lens 2 in the front-rear direction, and a support member 23 for supporting the holding member 22. The holding member 22 is provided with a step portion 62 which holds the lens 2 by forming a gap between the inner surface of the main body 5 and the lens 2. The holding member 22 is provided on the main body 5 and is detachably provided in a direction perpendicular to the lens advancing axis A.

In order to install the lens 2 in the intraocular lens insertion device 1 according to the present modification, the holding member 22 is inserted into the through hole and the lock mechanism 21 is attached to the main body 5. Then, the lens 2 is inserted, and the lens 2 is placed on the step 62 between the holding members 22. By thus installing the lens 2, the lens 2 is held in a state where a gap is formed between the lens 2 and the inner surface of the lens installation portion 3. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6.

At the time of use, the support member 23 is removed from the main body 5 and the holding member 22 is moved in a direction substantially perpendicular to the lens advancing axis A. At this time, when the stepped portion 62 becomes lower than the inner surface of the lens mounting portion 3, the lens 2 abuts on the inner surface of the lens mounting portion 3. Further, when the holding member 22 is moved in the vertical direction and removed from the main body 5 to release the lock, the state can be shifted to the use state. By thus providing the step on the holding member 22, the lens 2 abuts the inner surface of the lens mounting portion 3 for the first time in use, thereby preventing the lens 2 from adhering to the inner surface of the lens mounting portion 3. 2 can be easily pushed out.

As described above, in the intraocular lens insertion device 1 according to the present embodiment, the lock mechanism 21 holds the lens 2 by forming a gap between the lens installation portion 3 and the lens 2. Since the lens 2 is in contact with the inner surface of the lens mounting portion 3 for the first time in use, the lens 2 is prevented from coming into close contact with the inner surface of the lens mounting portion 3 and the lens 2 can be easily pushed out. Can.

The present invention can be variously modified and implemented within the scope of the subject matter of the present invention which is not limited to the present embodiment. For example, the lens 2 is installed with a gap between itself and the main body 5 It may be configured to By so doing, the lubricant can be easily introduced between the lens 2 and the main body 5, so that the lens 2 can be pushed out smoothly.

Claims

The scope of the claims

[1] An intraocular lens inserting instrument comprising: a main body including a lens installation portion in which a lens is installed and a cylinder portion in which the lens is introduced; and a lens pushing mechanism for pushing out the lens installed in the lens installation portion. The lens installation portion has a lock mechanism for fixing the lens, and the lock mechanism is configured to be released by moving or deforming the lock mechanism or the lens, and the lock mechanism is coaxial with the lens pushing mechanism. An intraocular lens insertion device characterized in that the lens is fixed on the top.

[2] The intraocular lens inserting instrument according to claim 1, characterized in that the locking mechanism is released by moving the lens pushing mechanism in the lens direction.

[3] The intraocular lens insertion according to claim 1 or 2, wherein the locking mechanism is provided so as to be movable or deformable in a direction substantially perpendicular to the advancing axis of the lens extruded by the lens pushing mechanism. Equipment.

[4] The lock mechanism according to any one of claims 1 to 3, wherein the lock mechanism comprises a holding member provided around the lens and holding the lens, and a support member supporting the holding member. For intraocular lens insertion.

[5] The intraocular lens inserting instrument according to any one of claims 1 to 4, wherein the locking mechanism is provided detachably at the lens installation portion.

[6] The eye according to claim 4 or 5, wherein the locking mechanism includes a hooking means for hooking and fixing the lens pushing mechanism in a state where the lens pushing mechanism is in contact with the lens. Inner lens insertion device.

[7] The cylinder unit is detachably provided with a cap member for protecting the tip of the cylinder unit, and the cap member is provided with a fixed shaft member for fixing a lens. 6

V, displacement device for intraocular lens insertion according to any one of the above.

[8] The invention is characterized in that the supporting member is constituted by a tab which can be separated from the main body.

The intraocular lens insertion instrument according to any one of 4 to 7.

[9] The eye according to any one of claims 1 to 8, wherein the locking mechanism is configured to form a gap between the lens installation portion and the lens to hold the lens. Inner lens insertion device.

[10] The support member is provided so as to be elastically deformable at the lens installation portion, and the lens pushing mechanism is configured to deform the lock mechanism by an operation of pushing the lens. The device for intraocular lens insertion according to any one of the above.

[11] The lens pushing mechanism comprises a plunger for pushing the lens and a slider having a lens contact portion larger than the plunger, and the slider deforms the lock mechanism by an operation of pushing the lens. The intraocular lens acupuncture instrument according to claim 9 or 10.

12. The intraocular lens insertion device according to claim 11, wherein the plunger and the slider interlock with each other to push out the lens.