WO2006029556A1

WO2006029556A1 - A disposable safety collection needle and a safety blood collection pen for one-off ejecting

Info

Publication number: WO2006029556A1
Application number: PCT/CN2005/000351
Authority: WO
Inventors: Yinggan Shi; Guoping Shi
Original assignee: Yinggan Shi; Guoping Shi
Priority date: 2004-09-15
Filing date: 2005-03-21
Publication date: 2006-03-23
Also published as: CN1313053C; CN1586396A

Abstract

A disposable safety blood collection needle and a safety blood collection pen for one-off ejecting are provided. The blood collection needle comprises a housing in which a needle core with a needle body is slidably arranged. The housing is provided with a cone-shaped or inclined plane at the inner wall of the foreside and an aperture on the fore-end thereof. Elastic pieces which engage slidably with the cone-shaped or inclined plane are provided symmetrically on the needle core to form a needlepoint-retractable structure. The blood collection pen comprises a housing and a locked ejection structure with an ejecting rod. A slidable pushing member is provided on the housing, the pushing rod of the member extends into the inserting aperture to engage with the blood collection needle. A pushing hook extends to the ejection rod to engage with the end face of it. A protrusion is provided on the side of the elongate arm of the pushing hook to engage with the inclined plane of the housing. An ejection head inserted in the inserting aperture, which facing the hitting surface of the blood collection needle, is provided on the fore-end of the ejecting rod.

Description

05 000351 Needle-retracting disposable safety blood collection needle and one-shot safety blood collection pen Technical field

The invention relates to a medical disposable safety blood collection needle and a primary emission type safety blood collection pen used together. Specifically, it relates to a disposable safety lancet for automatically retracting the needle tip, and a safety pen that can not be repeatedly fired once.

Background technique

At present, in the medical blood collection needle device, the method of using the disposable blood collection needle and the blood collection pen is one of the typical types of the blood needle device. This type of blood collection device consists of a blood collection needle and a blood collection pen. The blood collection needle is a needle-pinning structure composed of a needle core and a needle cap. The blood collection needles are simple in structure and disposable. The blood collection pen is used as a launcher with a set of ejection mechanism that can be reused. When using, install the disposable blood collection needle on the head of the blood test pen. After the launch, remove the disposable blood collection needle, and then install the new blood collection needle for re-use, which is equivalent to the relationship between the bullet and the gun. Compared with the disposable automatic blood collection needle with the launching mechanism, since the blood collection pen can be reused, and the disposable blood collection needle has a low growth rate, the blood collection device is low in use cost and is easily accepted by the medical institution. At the same time, it avoids unnecessary waste. At present, this blood collection device occupies a considerable market.

However, from the perspective of safety, there is a common safety problem in all disposable needles in the current range of 4Η3⁄4Γ, that is, due to the exposure of the tip of the blood collection needle, it is easy to cause stab wounds and crossovers during the needle unloading. The risk of infection; the needle tip is also prone to harm the body after abandonment and causes cross-infection. Although most disposable lancets currently have a needle cap or a needle cap, the fact that the needle cap or the needle cap is not covered by the needle tip after the actual use often occurs, and thus there is also a great risk.

On the other hand, there is a common safety problem in the structural design of the conventional blood collection pen on the market, that is, after a blood collection needle is installed, the emission can be repeated, which is easy to cause cross infection due to the negligence of the medical staff. . Especially in the state of high blood collection patients, fast working pace or high tension, it is easy to use again. On the other hand, the end face of the needle of the existing blood collection pen directly contacts the skin of the blood collection site of the human body, and is not replaceable. If it is not effectively disinfected and sterilized during repeated use, it is easy to cause cross infection of the pathogen or residual blood virus. Although many manufacturers and researchers have been concerned about this issue for a long time, no satisfactory answer has been found so far.

Summary of the invention

The invention proposes

Safety blood collection pen, its purpose is to solve the safety problem of the present disposable safety blood collection needle tip exposed The safety issue of 2005/000351 and the blood collection pen can be repeated after a blood collection needle is installed.

In order to achieve the above object, the technical solution adopted by the blood collection needle of the invention is: a needle tip retracting disposable safety blood collection needle, comprising a needle core with a needle body, the innovation thereof is: placing the needle core in a casing, and The inner cavity of the outer casing is slidably matched; the rear end of the core is provided with an impact surface exposed in the open end of the outer end of the outer casing or outside the open; the inner wall of the front part of the outer casing is provided with a tapered surface or a symmetrical inclined surface, and the front end is provided with a pinhole. The elastic piece is symmetrically arranged on the needle core corresponding to the tapered surface or the inclined surface. The elastic piece extends obliquely forward and has an acute angle with the needle body. During the forward movement of the elastic piece with the needle core, the end of the elastic piece slides with the tapered surface or the inclined surface, and the cone is matched. The length of the face or bevel projected in the axial direction of the needle body is greater than the length exposed when the needle tip is emitted, thereby forming the tip retracting structure.

The relevant content and changes in the above technical solutions are explained as follows:

1. In the above solution, in order to enable the blood collection needle to be locked after being inserted into the blood collection pen, a protrusion or a barb for preventing the needle core from slipping out is provided on the inner wall of the open end of the outer casing, and the rear end of the needle core hits the upper and lower sides of the needle core. A cavity, a protrusion or a barb and a cavity are respectively arranged to cooperate with the pusher head hook body in the blood collection pen insertion hole to form an insertion locking structure.

2. In the above solution, a hole or a groove is recessed in the center of the impact surface at the rear end of the core, and the bottom surface of the hole or groove serves as a positioning reference surface of the needle body.

3. In the above scheme, in order to facilitate the assembly of the blood collection needle, the rear end of the needle core is designed to be open, and the open circumference is spaced apart from the slot to make the opening elastic, so as to facilitate the loading of the core.

4. In the above scheme, in order to ensure that the needle tip does not come into contact with the outside after disinfection, a protective measure of the needle cap or the needle cover is adopted. When the needle cap is used, the needle tip sealing structure can be formed directly or integrally connected to the needle tip, and the needle cap protrudes from the needle exit hole at the front end of the casing. When the needle cover is used, it can be directly placed on the front end of the housing to form a needle tip seal space.

In order to achieve the above object, the technical solution adopted by the blood collection pen of the present invention is: a one-shot type safety blood collection pen, having a casing, and a casing with a shooting structure with a firing rod, the innovation of which is: the front end of the casing corresponds to the blood collection needle There are insert holes;

The housing is provided with a sliding pressing member, and the pushing member has a pushing body extending directly to the insertion hole to cooperate with the blood collecting needle; a push hook extends to the firing rod, and cooperates with the pushing rod pressing end surface, and the pushing hook extends The side of the arm is provided with a protrusion, which cooperates with the inclined surface on the casing, thereby forming a push rod interlocking locking mechanism for loading the needle; and a push button is exposed outside the casing, thereby forming a needle removing mechanism;

The front end of the launching rod has a head that is opposite the position of the lancet impact surface in the front insertion hole. The relevant content and changes in the above technical solutions are explained as follows:

1. In the above solution, the locking shooting structure comprises a firing rod, a shooting spring, a locking component and a button, the firing rod is slidably mounted in the shooting cavity of the housing, and the rear end of the firing rod is connected to the shooting spring, the locking portion The member is a rod member, the rod member is rotatably supported on the casing, and the front end of the rod member is provided with a locking hook, and the locking hook is provided with a locking buckle on the side of the firing rod, and the locking hook and the locking buckle cooperate to form a locking structure, and the button is provided with a button The inclined rod extends to the active end of the rod and cooperates with the active end to form an emission structure; an adjustment head and a button spring are connected in series between the shooting spring and the button, and an adjustment arm is arranged on the side of the adjustment head The adjusting arm protrudes from the adjusting hole on the side of the housing, and the adjusting hole is a chute hole.

In order to make the depth of the butt of the needle into a stepwise adjustment, a convex rib may be arranged between the outer edge of the adjusting head and the inner edge of the corresponding matching section of the housing, and the other circumferential direction is provided with a groove, and the convex rib cooperates with the groove. It forms a stepped adjustment structure for the needling depth.

2. In the above scheme, in order to lock the blood collection needle after inserting the blood collection needle (corresponding to the above blood collection needle solution explanation 1), a hook body is provided at the head of the push rod, and when the needle is inserted into the hole, the push rod is The head extends into the cavity at the rear end of the lancet core, and the hook body cooperates with the protrusion or barb provided on the lancet housing to form an insertion locking structure.

3. In the above solution, in order to solve the problem of root fatigue when the push hook is under pressure for a long time, a reset pocket may be arranged on the inclined surface at the rear end position corresponding to the convex motion, and a free fall air passage may be arranged on the side of the launching rod corresponding to the push hook. .

4. In the above solution, in order to observe the working state of the blood collection pen after being loaded into the blood collection needle (either the emitted state or the to-be-launched state), the housing may be provided with a transparent window at a position after the corresponding shot is emitted. The transparent windows are respectively disposed on the radial front and rear walls of the casing.

5. In the above solution, the inner wall of the blood collection needle insertion hole is provided with two slots in parallel, and an elastic protrusion is arranged between the two slots, and the protrusion cooperates with the outer wall of the blood collection needle to form a pine-proof structure, so that blood collection is performed. After the needle is inserted into the insertion hole, it does not fall off by itself.

Due to the above technical solutions, the present invention has the following advantages over the prior art:

1. Since the rebounding mechanism of the elastic piece is arranged between the needle core and the outer casing of the blood collecting needle of the invention, after the disposable safety blood collecting needle is used, the needle tip is automatically retracted in a safe outer casing, so that the needle tip is improved step by step. The integrity of the needle. mouth '

2. Due to the design of the launching mechanism of the plunger of the blood collection pen of the present invention, the blood collection pen can only be fired once and can not be repeatedly fired, which completely solves the problem that the conventional blood collection pen can repeatedly emit a blood collection needle. Problem, effectively avoiding the risk of cross-infection, further improved

3. Since the end face of the needle for direct contact with the skin of the human blood collection site is disposed on the outer casing of the blood collection needle, when the blood stasis needle is replaced, the end face of the needle insertion hole is simultaneously replaced, so that not only the needle tip is used once at the time of blood collection, but The end face of the needle hole is also used for one-time use, effectively avoiding the risk of cross-infection. 2005/000351 further improved the safety of the blood collection pen.

4, due to the invention

In the process, the end face of the pinhole is used once, eliminating the need to clean and disinfect the end face of the pinhole after the previous use, which not only reduces the operation requirements, simplifies the operation steps, but further improves the safety of use.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front elevational view showing an embodiment of a blood collection needle and a pen according to the present invention.

Figure 2 is a plan view of Figure 1.

Figure 3 is a cross-sectional view taken along the line B-B of Figure 1, showing the state in which the needle is to be inserted.

Figure 4 is a cross-sectional view taken along line AA of Figure 2,

Figure 5 is a cross-sectional view showing the state in which the needle is inserted.

Figure 6 is a perspective view showing the internal structure of the embodiment of the blood collection needle and the jk pen of the present invention, and shows the state of the needle to be inserted.

Figure 7 is a perspective view showing the internal structure of the embodiment of the jk needle and the Jk pen of the present invention,

Post-insertion status.

Figure 8 is a front elevational view of an embodiment of a blood collection needle of the present invention.

Figure 9 is a plan view of Figure 8.

Figure 10 is a left side view of Figure 8.

Figure 11 is a cross-sectional view taken along line H-H of Figure 9;

Figure 12 is a cross-sectional view taken along line G-G of Figure 9;

Figure 13 is a perspective view of a half-shell of a blood collection pen.

Figure 14 is a schematic diagram of a five-stage adjustment structure of the depth of the butt.

In the figure: 1. Needle body; 2. Needle core; 3. Needle cap; 4. Shell; 5. Needle hole; 6. Impact surface; 7. Bevel; 8. Elastic piece; 9. Groove; 11, notch; 12, housing; 13, blood collection needle insertion hole; 14, push parts; 15, push rod; 16, push hook; 17, launching rod; 18, convex; 19, bevel; 21, push button; 22, shooting spring; 23, locking member; 24, button; 25, lock hook; 26, lock; 27, inclined rod; 28, adjustment head; 29, button spring; 31, adjustment arm; 32, groove; 33, elastic protrusion; 34, blood collection needle; 35, blood collection pen; 36, cavity; 37, hook body; 38, convex rib; 39, groove; , transparent window; 41, reset pocket; 42, empty channel.

detailed description

The present invention is further described below in conjunction with the accompanying drawings and embodiments:

Embodiment 1 Referring to FIG. 12 and FIG. 4 to FIG. 7, a needle tip retractable disposable safety lancet is composed of a needle core 2 with a needle body 1, a needle cap 3, a casing 4 and an elastic piece 8. The needle cap 3 is directly placed over the needle tip to form a needle tip sealing structure. The core 2 is placed in a housing 4 and is internal to the housing 4 Sliding fit. The rear end of the core 2 is provided with an impact surface 6 which is exposed in the open end of the rear end of the outer casing 4, and the inner wall of the open bottom is provided with a barb 10 for preventing the needle core 2 from slipping out, and the opening is circumferentially spaced apart from each other. 11, see Figure 8. The front inner wall of the outer casing 4 is provided with two symmetrical inclined faces 7, and the front end is provided with a pinhole 5 through which the needle cap 3 projects. Two elastic pieces 8 are symmetrically arranged on the corresponding curved surface 7 of the core 2, and the elastic piece 8 extends obliquely forward and at an acute angle with the needle body 1. The elastic piece 8 slides with the inclined surface 7 as the needle core 2 moves forward. In cooperation, the length of the inclined surface 7 projected in the axial direction of the needle body 1 is larger than the length exposed when the needle tip is emitted, thereby constituting the needle tip retracting structure.

In order to enable the blood collection needle to be locked after being inserted into the blood collection pen, the inner wall of the rear end of the outer casing 4 is provided with a barb 10 for preventing the needle core 2 from slipping out, and the rear end impact surface 6 of the core 2 is respectively provided with a concave surface. The cavity 36, the barb 10 and the cavity 36 cooperate with the head hook body 37 of the push rod 15 in the blood collection pen insertion hole 13 to form an insertion locking structure, see Fig. 5. This structure is to prevent the user from directly pulling the ^k needle from the blood collection pen by hand after the use of the blood collection needle, instead of unloading the needle by the push button 20 in accordance with normal operation.

In order to accurately position the needle body 1 in the axial direction of the needle core 2, the impact surface 6 at the rear end of the core 2 is recessed in the center, and the bottom surface of the groove 9 serves as a positioning reference plane for the axial direction of the needle body 1, as shown in Fig. 12.

The working principle of the blood collecting needle of the present invention is as follows: Referring to FIG. 12, when not in use, the needle tip is sleeved on the needle tip 3, and the elastic piece 8 is in an open state, and is opposed to the outer casing 4, and the needle core 2 is located in the outer casing 4; Put the blood collection needle on the blood collection pen and unscrew the needle cap 3. When launching, the impact force of the injection head acts on the impact surface 6 at the rear end of the core 2, and the needle core slides toward the front end due to inertia, and the elastic piece 8 is Squeeze forward, the end of the elastic piece 8 slides along the inclined surface of the casing, and the two elastic pieces 8 which are opened are compressed and deformed. At this time, the needle tip protrudes from the needle exit hole 5, and performs k k When the inertial force of the launch is canceled by the restoring force generated by the deformation of the elastic piece 8, the restoring force of the elastic piece 8 immediately pushes the core back into the casing 4, and the needle tip thereof is also retracted into the casing 4.

Embodiment 2: A one-shot type safety blood collection pen has two half-shells which are combined to form a casing 12, as shown in Figs. 2 and 13. Referring to Figures 4 to 7, a lock shooting structure with a firing rod 17 is provided in the housing 12. The front end of the casing 12 is provided with an insertion hole 13 corresponding to the blood collection needle. The housing 12 is provided with a sliding pressing member 14 having a push rod 15 extending directly to the insertion hole 13 for engaging with the blood collection needle; a push hook 16 extending to the firing rod 17, and the firing rod 17 Pressing the end face, the side of the extension arm of the push hook 16 is provided with a protrusion 18, which cooperates with the inclined surface 19 on the housing 12, thereby forming a push rod interlocking lock of the needle; and a push button 20 is exposed on the shell In the case of the body 12, the unloading needle W=hook is formed. The front end of the firing rod has a head 21 which faces the lancet impact surface 6 in the front insertion hole 13.

The lock shooting structure is composed of a firing rod 17, a shooting spring 22, a locking member 23, an adjustment head 28, a button spring 29, and a button 24. The launching rod 17 is slidably mounted in the shooting chamber of the housing 12, The rear end of the shooting rod 17 is connected to the shooting spring 22, and the shooting spring 22 is placed on the adjusting head 28. The adjusting head 28 is symmetrically provided with two adjusting arms 30, and the adjusting arm 30 protrudes from the adjusting hole 31 on the side of the housing 12. The adjustment hole 31 is a chute hole, as shown in FIGS. 1 and 2. A button spring 29 is disposed between the other side of the adjustment head 28 and the button 24, as shown in Figs. 4 to 7. The locking member 23 is a rod member, and the rod member is rotatably supported on the housing 12. The front end of the rod member is provided with a locking hook 25, and the locking hook 25 is provided with a locking hook 26 on the side of the firing rod 17, and the locking hook 25 and the locking hook 26 are provided. The fit constitutes a locking structure. The button 24 is provided with a beveled lever 27 which extends to the active end of the lever and cooperates with the active end to form an emissive structure.

In order to change the depth of the butt into a five-stage adjustment structure, as shown in FIG. 14, the ribs 38 are disposed on the outer edge of the adjusting head 28, and five grooves 39 are circumferentially spaced apart on the inner edge of the corresponding fitting section of the casing 12. When the adjustment head 28 is rotated, the rib 38 and the groove 39 cooperate to form a five-step adjustment structure of the needling depth.

In order to lock the needle after inserting the pen, a hook body 37 is provided at the head of the push rod 15, and when the blood collection needle is inserted into the insertion hole 13, the head of the push rod 15 extends into the cavity at the rear end of the blood collection needle core 2. 36. The hook body 37 cooperates with the barb 10 provided on the lancet housing 4 to form an insertion locking structure, as shown in Figs. 4-7. This structure is to prevent the user from directly pulling the blood collection needle from the blood collection pen by using the blood collection needle. If there is no locking structure, the push rod 15 will not be taken out, but in the upper position, when the next time the needle is loaded. The launching rod 15 cannot be properly driven to move backward, which is inconvenient for use. Due to this locking structure, the user does not affect the next use regardless of whether the user unloads the needle or pushes the needle by pressing the push button 20.

In order to solve the problem of root fatigue when the push hook 16 is under pressure for a long time, as shown in FIGS. 4 to 7, a reset pocket 41 is disposed on the inclined surface 19 at a rear end position corresponding to the movement of the projection 18, and a push hook 16 is provided on the side of the launching rod 17. Set free fall airway 42. The air passage 42 may be a slot or a space. When the push hook 16 moves rearwardly with the pressing member 14, the projection 18 enters the inclined surface 19 and finally falls into the recess 14, and at this time, the push hook 16 falls on the air passage 42. The middle is in a state of free fall, not a stressed state. This solves the problem that the user forgets to remove the lancet after use, and the push hook 16 is in a pressed state for a long time, which causes fatigue of the root of the push hook 16 and the function is lowered, and the normal operation is impossible.

In order to observe the working state of the blood collection pen (either the launched state or the to-be-launched state) after loading the blood collecting needle, as shown in FIG. 1, FIG. 5, FIG. 6, FIG. 13, the housing 12 is in the corresponding shooting head. A transparent window 40 is disposed at a position after the post-emission, and the transparent windows 40 are respectively disposed on the radial front and rear walls of the casing 12. When the transparent window 40 shows a blank (the head 21 is not visible), it indicates that the head 21 is in a state to be launched; when the head 21 can be directly observed through the transparent window 40, it indicates that the head 21 is in a fired state. The advantage of this design is: Through the transparent window 40, the working state of the shooting head 21 can be directly observed, No, J, because the working state of the shooting head 21 cannot be recognized, when the user is in use, for some reason After suspending use, it is impossible to distinguish whether the blood collection pen has been used by picking up the blood collection pen again. With the transparent window 40, the user can be reminded to use it properly after the interruption of use. The inner wall of the blood collection needle insertion hole 13 is provided with two slots 32 in parallel, and an elastic protrusion 33 is disposed between the two slots 32, and the protrusion 33 cooperates with the outer wall of the blood collection needle to form a loose structure, as shown in FIG. And Figure 13.

The working principle of the blood collection pen of the present invention is: when the blood collection needle is not installed, as shown in FIG. 4, the firing rod 17 is located at the front of the outer casing, and the buckle 26 is separated from the locking hook 25 of the locking member 23; In the insertion hole 13, the blood collection needle pushes the pressing member 14 backward by the push rod 15, and the push hook 16 on the pressing member 14 cooperates with the pressing end surface of the firing rod 17, and drives the firing rod 17 together. After the movement, the shooting spring 22 is compressed, and at the same time, the projection 18 on the push hook 16 also gradually slides toward the inclined surface 19 on the housing; when the firing rod 17 is moved into position, the latch 26 hooks the locking hook of the locking member 23. At 25 o'clock, the protrusion 18 on the push hook 16 slides along the inclined surface 19, so that the extension arm of the push hook 16 swings outward, and the push hook 16 is separated from the pressing end surface of the launching rod 17, as shown in FIG. , in the state to be fired; when launching, pressing the button 24, the inclined rod 27 moves forward, acting on the active end of the rod of the locking member 23, the active end of the rod swings in the direction of the axis, and the other end is outward Swing open to disengage the lock hook 25 from the buckle 26, and the launching rod 17 It will be ejected forward by the elastic force of the shooting spring 22, and the head 21 of the front end will hit the impact surface 6 of the blood collection needle, and the impact force will be transferred to the blood collection needle to emit the blood collection needle; Both the locking member 23 and the pressing member 14 are disengaged, and the push hook 16 on the pressing member 14 is located in the middle of the firing rod 17, and cannot act on the firing rod. At this time, pressing the button again has no effect and does not continuously emit. Now, the user can only perform the operation of replacing the blood collection needle, pushing the push button 20 of the pressing member 14 forward, and the push rod 15 ejects the emitted needle from the insertion hole 13 at this time. Returning to the state in which the lancet is not installed, the user can insert a new lancet into the insertion hole 13 for installation, as shown in Fig. 4, to reciprocate.

The working principle of the adjusting head portion of the invention is: when the needling depth is adjusted, the adjusting head 28 can be rotated by the adjusting arm 30, so that the axial position of the transmitting rod 17 in the blood collecting pen can be changed, so that the lifting rod 17 can be adjusted to be pushed. The needle 1 is used to achieve the purpose of adjusting the amount of ^kk. When the outer edge of the adjusting head 28 and the inner edge of the corresponding engaging section of the housing 12 are provided with the matching structure of the rib 38 and the groove 39, the adjustment will become a step-adjusting structure, and the rib 38 and the groove 39 are rotated when the adjusting head 28 is rotated. Produces a "beep" sound, giving people the feeling of adjusting recognition.

The above embodiments are only intended to illustrate the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and to implement the present invention, and the scope of the present invention is not limited thereto. Equivalent variations or modifications made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

Claims

1. A needle-tip retractable disposable safety blood collection needle, comprising a needle core [[[]] with a needle body [[], characterized in that: the needle core [21 is placed in a casing [41, and with the outer casing [4] The inner cavity is slidingly fitted; the rear end of the core [2] is provided with an impact surface [6], which is exposed in the open end of the outer casing [4] or outside the opening; the outer casing [4] is provided on the front inner wall Conical surface or symmetrical inclined surface [η, the front end is provided with a pinhole [5], and the elastic core piece [8] is symmetrically arranged on the needle core [2] corresponding to the tapered surface or the inclined surface [7], and the elastic piece [8] is obliquely oriented. The front extension and the needle body [1] are at an acute angle, and the elastic piece [8] moves forward with the needle core [2], and its end is tapered with a tapered surface or a beveled surface [η sliding fit, tapered surface or inclined surface [7] in the needle The length of the axial projection of the body [1] is greater than the length exposed when the tip is emitted, thereby forming the tip retraction structure.

2. The needle tip retractable disposable safety lancet according to claim 1, wherein: the inner wall of the rear end of the outer casing [4] is provided with a protrusion or barb that prevents the needle core from sliding out [21]. [10], the core [2j rear end impact surface [6] is provided with a concave cavity [36] on the upper and lower sides, a convex or barb [10] and a concave cavity [36] and a blood collection pen insertion hole [13] The pusher [15] head hook body [37] cooperates to form an insert locking structure.

3. The needle tip retractable disposable safety lancet according to claim 1, wherein: the impact surface of the rear end of the core [2] [6] has a central recess or groove [9], the hole or the groove [ The bottom surface of 9] is used as the positioning reference surface of the needle body [1] in the axial direction.

4. The needle tip retractable disposable safety lancet according to claim 1, wherein: the rear end of the outer casing [4] is open, and the open circumferential direction is spaced apart from the slot [11].

5. The needle tip retractable disposable safety lancet according to claim 1, wherein: the needle tip is provided with a needle cap 〖3], and the needle cap [3] is directly fitted or integrated. The needle tip seal structure is formed on the tip of the needle, and the needle cap [3] protrudes from the needle exit hole [5] at the front end of the shell [4].

6. The needle tip retractable disposable safety lancet according to claim 1, wherein: the front end of the outer casing [4] is provided with a needle cover, and the needle cover is directly sleeved on the front end of the outer casing [4] to form a needle tip sealing space.

7, a launch-type safety ^ k pen, has a shell [12], the shell [12] has a set of with a launching rod

[17] The locking shot structure is characterized by:

The front end of the housing [12] corresponding to the needle is provided with an insertion hole [13];

The sliding shell [12] is provided with a sliding pressing member [14], and the pressing member [14] has a push rod [151 directly extending to the insertion hole [13], which cooperates with the blood collecting needle; and has a push hook [16] Extending to the firing rod [17], mating with the pressing end of the firing rod [17], the side of the extension arm of the push hook [16] is provided with a protrusion [18], which cooperates with the inclined surface [19] on the casing [12] , thereby forming a push rod interlocking locking mechanism for loading the needle; and a pressing button [20] is exposed outside the casing [12] to constitute the needle removing mechanism;

The front end of the launching rod [17] has a head [21] which is facing the lancet in the front insertion hole [13] Impact surface [6] position.

8. The primary emission type safety blood collection pen according to claim 7, wherein: the locking shooting structure comprises a firing rod [17], a shooting spring [22], a locking member [ ²³ ], and a button [ ²⁴ ], a firing rod [ 1 slidingly installed in the shooting chamber of the housing [12], the rear end of the firing rod [17] is connected to the shooting spring [22], the locking member [23] is a rod member, and the rod member is rotatably supported on the housing [12]. The front end of the rod is provided with a locking hook [25], and correspondingly the locking hook [25] is provided with a locking buckle [26] on the side of the firing rod [17], and the locking hook [25] and the locking buckle [26] cooperate to form a locking structure, the button [24] is provided with a beveled rod [27], which extends to the active end of the element and cooperates with the active end to form an emission structure.

9. The primary emission type safety blood collection pen according to claim 8, wherein: an adjustment head [28] and a spring (29) are connected in series between the shooting spring [22] and the button [24]. ], the adjustment head [28] is provided with an adjustment arm [30] on the side, and the adjustment arm [30] protrudes from the adjustment hole [31] on the side of the housing [12], and the adjustment hole [311 is a chute hole.

The one-shot type safety blood collection pen according to claim 9, wherein: the outer edge of the adjusting head [28] is corresponding to the inner edge of the corresponding section of the housing [12], and one of the ribs is provided [38]. ], another circumferential direction is provided with a groove [39], and the convex rib [38] and the groove [39] cooperate to form a stepped adjustment structure of the needling depth.

The one-shot type safety blood collection pen according to claim 7, characterized in that: the head of the push rod [15] is provided with a hook body [37], and when the blood collection needle is loaded into the insertion hole [13], The pusher [I ⁵ ] head extends into the cavity [36] at the rear end of the blood collection needle core [2], the protrusion or barb provided on the hook body [37] and the blood collection needle [4] [10J The fit constitutes an insert locking structure.

12. The primary emission type safety blood collection pen according to claim 7, wherein: the inclined surface

[191] corresponding bulge [18] The rear end position of the movement is set to the reset pocket [41], and the side of the firing rod [17] corresponds to the push hook [16] to set the free-falling empty channel [42].

13. The primary emission type safety blood collection pen according to claim 7, wherein: said housing [12] is provided with a transparent window [40] at a position after the corresponding shot [21] is emitted, and the transparent window [40] They are respectively arranged on the radial front and rear walls of the casing [12].

The one-shot type safety blood collection pen according to claim 7, wherein: the inner wall of the blood collection needle insertion hole 〖13] is provided with two slots 〖32〗 in parallel, in two slots [32] An elastic protrusion 〖33j is arranged between the protrusions 33, and the protrusion [33] cooperates with the blood collection needle to form a lock structure.