Disposable Anti-needlestick injection pen needle

Abstract

Provided in the present invention is a disposable anti-needlestick injection pen needle. A needle holder comprises a first holder body and a second holder body, the second holder body and the first holder body being integrally formed. The first holder body is provided with elastic snap teeth near the second holder body, the upper end of the elastic snap teeth being a beveled surface. A needle tip protector is located on the outer side of the second holder body, the outer wall of the lower portion thereof being provided with a stop block. A spring is limited by the needle tip protector and the first holder body. The lower end of a snap seat is rotatably connected to the needle holder, the inner wall of the lower portion thereof being provided with sliding pieces; the sliding pieces are integrally formed with a snap seat boss. One side of the lower end of the sliding pieces is a beveled surface, and the beveled surface of the sliding pieces cooperates with the beveled surface of the elastic snap teeth for rotation; the other side of the lower end of the sliding pieces is a vertically-arranged stop surface. After the sliding pieces pass through the elastic snap teeth, the elastic snap teeth spring upward to limit the snap seat stop surface, preventing the snap seat from rotating backward. A needle holder protector is located on the outer side the first holder body, the needle tip protector and the snap seat, the lower end thereof being sealed by dialysis paper. In the present invention, the design of the elastic snap teeth and the stop surface can fully limit movement and rotation of the needle tip protector, thereby achieving the comprehensive anti-needlestick function.

Description

Disposable needle-proof injection pen needles Technical Field

[0001] This invention relates to the field of injection needle technology, and more particularly to a disposable needle for an anti-needle-puncture injection pen. Background Technology

[0002] Due to hygiene requirements, commonly used non-disposable syringes require the needle to be capped after use to protect the needle. Because the needle is very thin and the diameter of the cap is not large, it is easy to prick the finger and cause infection to medical staff.

[0003] To address this issue, spring-loaded needle-puncture-proof syringes have emerged on the market. After injection, pushing the piston further triggers a spring mechanism, causing the needle to spring back into the syringe. While this effectively prevents needle pricks, it requires pushing the piston to the zero mark to expel air from the syringe when drawing up the medication. This can easily lead to accidental triggering, wasting medical equipment, and delaying injection time. Summary of the Invention

[0004] The purpose of this invention is to provide a disposable needle for a needle-proof injection pen that is safer for caregivers and patients and reduces production costs.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A disposable needle for a needle-proof injection pen, characterized in that it includes:

[0007] The needle seat includes a first seat body located at its bottom end and a second seat body located at its center. The second seat body is integrally formed with the first seat body. The first seat body is provided with a plurality of spring clip teeth near the second seat body. The upper end of the spring clip teeth is an inclined surface that slopes upward from one end to the other end. The first seat body is provided with an annular groove near its outer edge.

[0008] The needle tip sheath is located on the outside of the second base body, and its lower outer wall is provided with several blocks;

[0009] The spring is located on the outside of the second seat, and its upper and lower ends are limited by the lower end of the needle tip sheath and the upper end of the first seat.

[0010] The card holder is located on the outside of the second seat and the needle tip sheath.

[0011] Its lower end is embedded in the annular groove so that it is rotatably connected to the needle seat.

[0012] Its inner wall is provided with a number of card slot grooves and card slot protrusions alternately along the circumference. The card slot grooves are used to avoid the stop block, and the card slot protrusions limit the lower end of the stop block.

[0013] The lower inner wall is provided with several sliding pieces. The sliding pieces are integrally formed with the lower end of the card seat boss. One side of the lower end of the sliding piece is an inclined surface that slopes upward from one end to the other end. The inclined surface of the sliding piece cooperates with the inclined surface of the spring clip tooth to rotate. The other side of the lower end of the sliding piece is a vertically arranged card seat stop surface. After the inclined surface of the sliding piece passes through the inclined surface of the spring clip tooth, the spring clip tooth springs up to limit the card seat stop surface and prevent the card seat from rotating.

[0014] The needle hub sheath is located outside the first seat body, the needle tip sheath, and the card holder. Its upper end is higher than the needle tip sheath, and its lower end is sealed with dialysis paper.

[0015] Furthermore, the first base is provided with a plurality of needle seat blocks, which are located in the gap between two adjacent spring clip teeth. The lower inner wall of the base is provided with a plurality of base protrusions, which are close to the inclined surface of the slide. The base protrusions cooperate with the needle seat blocks, so that the slide of the base rotates through the needle seat teeth and is stopped by the needle seat blocks. When the base continues to rotate, it will drive the needle seat to rotate together.

[0016] Furthermore, one side of the needle seat block is provided with a vertical stop surface, and one end of the card seat protrusion is provided with a vertical convex surface, the shapes of the convex surface and the stop surface are matched.

[0017] Furthermore, the inner side of the needle seat block is provided with a guide ramp, which cooperates with the outer edge of the spring, making it easy for the spring to be inserted into the first seat body.

[0018] Furthermore, the outer edge of the stop block is provided with a downwardly bent positioning block, which engages with the upper end of the card seat boss.

[0019] Furthermore, the upper end of the card holder boss is an inclined surface that slopes downward from the inside to the outside, making it easy for the positioning block to be inserted into the card holder boss.

[0020] Furthermore, the other end of the spring clip tooth is curved upwards in an arc shape, so that after the inclined surface of the slider passes through the inclined surface of the spring clip tooth, the other end of the spring clip tooth can easily block the card seat stop surface.

[0021] Furthermore, the upper part of the second seat extends outward to provide a needle seat boss, and the inner wall of the lower part of the needle tip sheath is provided with a sheath groove. The sheath groove cooperates with the needle seat boss to prevent the needle tip sheath from rotating around the needle seat.

[0022] Furthermore, the inner wall at the lower end of the needle tip sheath is provided with a hook along the circumference. The hook engages with the needle seat boss to prevent the needle tip sheath from coming off the needle seat.

[0023] Furthermore, a buckle is provided on the outer side of the annular groove, and a locking platform is provided at the lower part of the locking seat. The locking platform cooperates with the buckle so that the locking seat does not come out after being inserted into the pin seat.

[0024] Furthermore, the other end of the spring clip tooth is provided with a protrusion, which is interference-fitted with one side of the slider to prevent the clip from rotating in a free state.

[0025] Furthermore, the inner wall of the needle hub sheath is provided with several vertical ribs, and the outer wall of the needle hub is provided with several needle hub vertical grooves. The positions of the needle hub vertical grooves and the vertical ribs are matched so that when the needle hub sheath rotates, it drives the needle hub to be screwed into the injection pen together.

[0026] Furthermore, the outer wall of the card holder is provided with several card holder vertical grooves, and the positions of the card holder vertical grooves are matched with the vertical ribs to prevent the card holder from rotating before use.

[0027] Furthermore, the vertical rib includes an integrally formed upper vertical rib and a lower vertical rib, the radial width of the upper vertical rib is greater than the radial width of the lower vertical rib, and the upper vertical rib and the lower vertical rib respectively mate with the outer wall of the card seat and the needle seat.

[0028] Furthermore, the first seat body includes an integrally formed upper seat body and a lower seat body. The outer diameter of the upper seat body is smaller than the outer diameter of the lower seat body. The lower vertical rib includes an integrally formed first lower vertical rib and a second lower vertical rib. The radial width of the first lower vertical rib is greater than the radial width of the second lower vertical rib. The first lower vertical rib and the second lower vertical rib respectively mate with the outer walls of the upper seat body and the lower seat body.

[0029] The spring structure of this invention allows the needle tip sheath to quickly return to its original position after use. The product remains in a state of covering the needle tip throughout the entire use process, preventing leakage. There are no other structures in the needle tip sheath during the sliding process, and the spring force is designed to be a comfortable force value for use.

[0030] The needle holder of this invention is provided with multiple inclined structure spring clip teeth, and the holder is provided with corresponding inclined surfaces. In this way, when the holder is rotated, the needle holder can pass smoothly through the clip teeth. The holder is provided with a stop surface on the opposite side of the inclined surface. After the holder passes smoothly through the tip of the clip tooth, the clip tooth will spring up and be blocked by the stop surface to turn the holder back.

[0031] The needle holder of this invention has a convex stop surface, and the card holder has a corresponding protrusion. After the card holder rotates and passes through the carding teeth of the needle holder, it will continue to rotate and hit the convex stop of the needle holder. Then, the rotation will drive the needle holder to rotate together, and the product can be removed from the injection pen. It is safe and reliable to use.

[0032] This invention can completely restrict the movement and rotation of the needle tip sheath, achieving comprehensive protection against puncture wounds. Attached Figure Description

[0033] Figure 1 is an overall structural diagram of the present invention;

[0034] Figure 2 is a side sectional view of the present invention;

[0035] Figure 3 is a bottom view of the needle tip sheath of the present invention;

[0036] Figure 4 is a bottom view of the card holder structure of the present invention;

[0037] Figure 5 is a structural diagram of the needle holder of the present invention;

[0038] Figure 6 is a structural diagram of the card slot slider of the present invention;

[0039] Figure 7 is a structural diagram of the convex surface of the card holder of the present invention;

[0040] Figure 8 is a schematic diagram of the snap-fit ​​connection between the needle seat and the card seat of the present invention;

[0041] Figure 9 is a structural diagram of the lower end of the needle tip sheath of the present invention;

[0042] Figure 10 is a structural diagram of the needle hub sheath of the present invention;

[0043] Figure 11 is a structural diagram of the vertical rib of the needle seat sheath of the present invention;

[0044] Figure 12 is an external structural diagram of the pin holder and card holder of the present invention.

[0045] Reference numerals: 1. Needle seat; 2. Needle tip sheath; 3. Spring; 4. Locking seat; 5. Needle seat sheath; 6. Dialysis paper; 101. First seat body; 102. Second seat body; 1011. Upper seat body; 1012. Lower seat body; 103. Spring clip tooth; 1031. Protrusion; 104. Annular groove; 105. Guide ramp; 106. Buckle; 107. Needle seat stop block; 108. Stop surface; 109. Needle seat boss; 110. Needle seat vertical groove; 201. Stop block; 202. Positioning block; 203. Sheath groove; 204. Hook; 401. Locking platform; 402. Locking seat groove; 403. Locking seat boss; 404. Sliding piece; 405. Locking seat stop surface; 406. Locking seat protrusion; 407. Protruding surface; 408. Locking seat vertical groove; 501. Vertical rib; 502. Upper vertical rib; 503. Lower vertical rib. 5031 First lower vertical bar, 5032 Second lower vertical bar. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0048] This application provides a needle for a disposable needle-proof injection pen, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0049] As shown in Figures 1 and 2, the embodiment includes a needle hub 1, a needle tip sheath 2, a spring 3, a retainer 4, and a needle hub sheath 5. The needle hub sheath 5 is located outside the needle hub 1, the needle tip sheath 2, and the retainer 4. The upper end of the needle hub sheath 5 is higher than the needle tip sheath 2, and the lower end of the needle hub sheath 5 is sealed by dialysis paper 6.

[0050] The needle holder 1 includes a first seat 101 located at its bottom end and a second seat 102 located at its center. The second seat 102 is integrally formed with the first seat 101. The spring 3 is located on the outside of the second seat 102. The upper and lower ends of the spring 3 are limited by the lower end of the needle tip sheath 2 and the upper end of the first seat 101.

[0051] The card holder 4 is located outside the second seat 102 and the needle tip sheath 2, as shown in Figure 8. The first seat 101 has an annular groove 104 near its outer edge. The lower end of the card holder 4 is embedded in the annular groove 104 so that it is rotatably connected to the needle seat 1. The outer side of the annular groove 104 is provided with a buckle 106. The lower part of the card holder 4 is provided with a card platform 401. The card platform 401 cooperates with the buckle 106 so that the card holder 4 does not come out after being inserted into the needle seat 1.

[0052] As shown in Figures 3 and 4, the needle tip sheath 2 is located on the outside of the second base 102. The lower outer wall of the needle tip sheath 2 is provided with four blocks 201. The upper inner wall of the card holder 4 is provided with four card holder grooves 402 and four card holder protrusions 403 alternately along the circumference. The card holder grooves 402 are used to avoid interference with the blocks 201. The card holder protrusions 403 limit the lower end of the blocks 201. When in use, the card holder 4 is rotated to push the card holder protrusions 403 against the lower end of the blocks 201 to achieve the purpose of preventing needle puncture.

[0053] As shown in Figure 9, the outer edge of the stop block 201 is provided with a downwardly bent positioning block 202. The positioning block 202 cooperates with the upper end of the card seat boss 403. The upper end of the card seat boss 403 is an inclined surface that slopes downward from the inside to the outside, making it easy for the positioning block 202 to be inserted into the card seat boss 403.

[0054] As shown in Figures 5 and 6, the first seat 101 is provided with several spring clips 103 near the second seat 102. The upper end of the spring clip 103 is an inclined surface that slopes upward from one end to the other. The lower inner wall of the card seat 4 is provided with four sliding pieces 404. The sliding pieces 404 are integrally formed with the lower end of the card seat boss 403. One side of the lower end of the sliding piece 404 is an inclined surface that slopes upward from one end to the other. The inclined surface of the sliding piece 404 cooperates with the inclined surface of the spring clip 103 to rotate. The other side of the lower end of the sliding piece 404 is a vertically arranged card seat stop surface 405. Because the spring clip 103 is elastic, when the inclined surface of the sliding piece 404 passes through the inclined surface of the spring clip 103, the spring clip 103 will spring up to limit the card seat stop surface 405, so as to prevent the card seat 4 from rotating.

[0055] The other end of the spring clip tooth 103 is curved upwards in an arc shape, so that after the inclined surface of the slide 404 passes through the inclined surface of the spring clip tooth 103, the other end of the spring clip tooth 103 can easily block the card seat stop surface 405. The other end of the spring clip tooth 103 is also provided with a protrusion 1031, which is interference-fitted with one side of the slide 404 to prevent the card seat 4 from rotating in a free state.

[0056] By using the spring clip 103 of the needle holder 1 and the sliding plate 404 and stop block 201 of the holder 4, the movement and rotation of the needle tip sheath 2 can be completely restricted, thus achieving the function of preventing puncture wounds.

[0057] As shown in Figures 5, 6, and 7, the first base 101 is provided with four needle seat blocks 107, which are located in the gap between two adjacent spring clip teeth 103. The lower inner wall of the base 4 is provided with four base protrusions 406, which are close to the inclined surface of the slide 404. The base protrusions 406 cooperate with the needle seat blocks 107. One side of the needle seat block 107 is provided with a stop surface 108 along the vertical direction, and one end of the base protrusion 406 is provided with a convex surface 407 along the vertical direction. The shapes of the convex surface 407 and the stop surface 108 are matched so that the slide 404 of the base 4 is stopped by the needle seat block 107 after rotating through the spring clip teeth 103. Therefore, when the base 4 continues to rotate, it will drive the needle seat 1 to rotate together.

[0058] As shown in Figure 5, the inner side of the first seat 101 is provided with a guide ramp 105, which cooperates with the outer edge of the spring 3, making it easy to insert the spring 3 into the first seat 101.

[0059] As shown in Figures 3 and 5, the upper part of the second base 102 extends outward and is provided with four needle base protrusions 109. The inner wall of the lower part of the needle tip sheath 2 is provided with four sheath grooves 203. The sheath grooves 203 cooperate with the needle base protrusions 109 to prevent the needle tip sheath 2 from rotating around the needle base 1.

[0060] As shown in Figure 9, the inner wall at the lower end of the needle tip sheath 2 is provided with a hook 204 along the circumference. The hook 204 is interference-fitted with the needle seat boss 109, so that the needle tip sheath 2 does not come out of the needle seat 1.

[0061] As shown in Figure 10, the inner wall of the needle holder sleeve 5 is provided with four vertical ribs 501, and the outer wall of the needle holder 1 is provided with eight needle holder vertical grooves 110. The needle holder vertical grooves 110 and the vertical ribs 501 are matched so that when the needle holder sleeve 5 rotates, it drives the needle holder 1 to be screwed into the injection pen together. The outer wall of the retainer 4 is provided with eight retainer vertical grooves 408. The retainer vertical grooves 408 and the vertical ribs 501 are matched to prevent the retainer 4 from rotating before use.

[0062] As shown in Figure 11, the vertical rib 501 includes an integrally formed upper vertical rib 502 and a lower vertical rib 503. The radial width of the upper vertical rib 502 is greater than the radial width of the lower vertical rib 503. The upper vertical rib 502 and the lower vertical rib 503 respectively mate with the outer walls of the card seat 4 and the needle seat 1.

[0063] As shown in Figure 12, the first seat 101 includes an integrally formed upper seat 1011 and a lower seat 1012. The outer diameter of the upper seat 1011 is smaller than the outer diameter of the lower seat 1012. The lower vertical rib 503 includes an integrally formed first lower vertical rib 5031 and a second lower vertical rib 5032. The radial width of the first lower vertical rib 5031 is greater than the radial width of the second lower vertical rib 5032. The first lower vertical rib 5031 and the second lower vertical rib 5032 respectively cooperate with the outer walls of the upper seat 1011 and the lower seat 1012, so that the inner wall of the needle seat sheath 5 is fully fitted with the outer walls of the needle seat 1 and the card seat 4.

[0064] The other structures and functions of the needle for the anti-needle-puncture injection pen provided in this embodiment correspond to the structures and functions implemented in the embodiment. Therefore, for other functions of this embodiment, please refer to the contents of the embodiment, which will not be repeated here.

[0065] The above provides a detailed description of the needle for the disposable needle-proof injection pen provided by this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A disposable needle for a needle-punch-proof injection pen, characterized in that, include The needle seat (1) includes a first seat body (101) located at its bottom end and a second seat body (102) located at its center. The second seat body (102) is integrally formed with the first seat body (101). The first seat body (101) is provided with a plurality of spring clip teeth (103) near the second seat body (102). The upper end of the spring clip teeth (103) is an inclined surface that slopes upward from one end to the other end. The first seat body (101) is provided with an annular groove (104) near its outer edge. The needle tip sheath (2) is located on the outside of the second seat (102), and its lower outer wall is provided with several blocks (201); the spring (3) is located on the outside of the second seat (102), and its upper and lower ends are limited by the lower end of the needle tip sheath (2) and the upper end of the first seat (101); The card holder (4) is located on the outside of the second seat body (102) and the needle tip sheath (2). Its lower end is embedded in the annular groove (104) so ​​that it is rotatably connected to the needle seat (1). Its inner wall is provided with a plurality of card slot grooves (402) and card slot bosses (403) alternately along the circumference. The card slot grooves (402) are used to avoid the stop block (201), and the card slot bosses (403) limit the lower end of the stop block (201). The lower inner wall is provided with several sliding pieces (404). The sliding pieces (404) are integrally formed with the lower end of the card seat boss (403). One side of the lower end of the sliding piece (404) is an inclined surface that slopes upward from one end to the other end. The inclined surface of the sliding piece (404) cooperates with the inclined surface of the spring clip tooth (103) to rotate. The other side of the lower end of the sliding piece (404) is a vertically arranged card seat stop surface (405)(108). After the inclined surface of the sliding piece (404) passes through the inclined surface of the spring clip tooth (103), the spring clip tooth (103) springs up to limit the card seat stop surface (405)(108) to prevent the card seat (4) from rotating. The needle seat sheath (5) is located outside the first seat body (101), the needle tip sheath (2) and the card holder (4), with its upper end higher than the needle tip sheath (2) and its lower end sealed by dialysis paper (6).

2. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The first seat (101) is provided with a plurality of needle seat blocks (201) (107). The needle seat blocks (201) (107) are located in the gap between two adjacent spring clip teeth (103). The lower inner wall of the card seat (4) is provided with a plurality of card seat protrusions (406). The card seat protrusions (406) are close to the inclined surface of the slide (404). The card seat protrusions (406) cooperate with the needle seat blocks (201) (107) so that the slide (404) of the card seat (4) rotates through the teeth of the needle seat (1) and is stopped by the needle seat blocks (201) (107). When the card seat (4) continues to rotate, it will drive the needle seat (1) to rotate together.

3. The needle for the anti-needle-puncture injection pen according to claim 2, characterized in that, The needle seat stop (201) (107) has a vertical stop surface (108) on one side, and the card seat protrusion (406) has a vertical convex surface (407) at one end, and the convex surface (407) and the stop surface (108) are matched in shape.

4. The needle for the anti-needle-puncture injection pen according to claim 2, characterized in that, The inner side of the needle seat block (201) (107) is provided with a guide ramp (105), which cooperates with the outer edge of the spring (3) so that the spring (3) can be easily inserted into the first seat body (101).

5. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The outer edge of the stop block (201) is provided with a downwardly bent positioning block (202), which engages with the upper end of the card seat boss (403).

6. The needle for the anti-needle-puncture injection pen according to claim 5, characterized in that, The upper end of the card holder boss (403) is an inclined surface that slopes downward from the inside to the outside, making it easy for the positioning block (202) to be inserted into the card holder boss (403).

7. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The other end of the spring clip tooth (103) is curved upwards in an arc shape, so that after the inclined surface of the slide (404) passes through the inclined surface of the spring clip tooth (103), the other end of the spring clip tooth (103) can easily block the card seat stop surface (405)(108).

8. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The upper part of the second seat (102) extends outward and is provided with a needle seat boss (109). The inner wall of the lower part of the needle tip sheath (2) is provided with a sheath groove (203). The sheath groove (203) cooperates with the needle seat boss (109) to prevent the needle tip sheath (2) from rotating around the needle seat (1).

9. The needle for the anti-needle-puncture injection pen according to claim 8, characterized in that, The inner wall at the lower end of the needle tip sheath (2) is provided with a hook (204) along the circumferential direction. The hook (204) cooperates with the needle seat boss (109) so that the needle tip sheath (2) does not come out of the needle seat (1).

10. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The annular groove (104) has a buckle (106) on its outer side, and the lower part of the card seat (4) has a card platform (401). The card platform (401) cooperates with the buckle (106) so that the card seat (4) does not come out after being inserted into the needle seat (1).

11. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The other end of the spring clip tooth (103) is provided with a protrusion (1031), which is interference-fitted with one side of the slide (404) to prevent the card holder (4) from rotating in a free state.

12. The needle for the anti-needle-puncture injection pen according to claim 1, characterized in that, The inner wall of the needle seat sheath (5) is provided with several vertical ribs (501), and the outer wall of the needle seat (1) is provided with several needle seat vertical grooves (110). The positions of the needle seat vertical grooves (110) and the vertical ribs (501) are matched so that when the needle seat sheath (5) rotates, it drives the needle seat (1) to be screwed into the injection pen together.

13. The needle for the anti-needle-puncture injection pen according to claim 12, characterized in that, The outer wall of the card holder (4) is provided with several card holder vertical grooves (408), and the card holder vertical grooves (408) are matched with the vertical ribs (501) to prevent the card holder (4) from rotating before use.

14. The needle for an anti-needle-puncture injection pen according to claim 13, characterized in that, The vertical rib (501) includes an integrally formed upper vertical rib (502) and a lower vertical rib (503). The radial width of the upper vertical rib (502) is greater than the radial width of the lower vertical rib (503). The shapes of the upper vertical rib (502) and the lower vertical rib (503) respectively mate with the outer walls of the card seat (4) and the needle seat (1).

15. The needle for the anti-needle-puncture injection pen according to claim 14, characterized in that, The first seat (101) includes an integrally formed upper seat (1011) and a lower seat (1012). The outer diameter of the upper seat (1011) is smaller than the outer diameter of the lower seat (1012). The lower vertical rib (503) includes an integrally formed first lower vertical rib (5031) and a second lower vertical rib (5032). The radial width of the first lower vertical rib (5031) is greater than the radial width of the second lower vertical rib (5032). The shapes of the first lower vertical rib (5031) and the second lower vertical rib (5032) respectively match the outer walls of the upper seat (1011) and the lower seat (1012).

Images