Retractable split type self-destruction syringe
By designing a retractable split self-destructing syringe, the plug-in structure of the push rod and the socket is used to retract the injection needle into the syringe, and the push rod is destroyed by the breaking groove, the cross-infection problem caused by the reuse of the syringe is solved and safety is improved.
Patent Information
- Application Number
- CN202420948233.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-05-06
AI Technical Summary
Existing syringes may be reused after use, resulting in the risk of cross-infection. In the prior art, there is a problem in replacing the recycled syringes with push rods before performing secondary packaging and sales.
A retractable split self-destructive syringe is designed, through the elastic clamping joint of the push rod and the clamping structure of the joint, so that the injection needle is pulled and retracted into the syringe through the push rod after injection, and the push rod is destroyed by the breaking groove to prevent the needle from being recycled.
It effectively avoids cross-infection caused by secondary recycling of needles after use, ensures that the syringe cannot be easily removed after use, and improves safety.
Smart Images
Figure CN222854356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of self-destructive syringes, in particular to a retractable split-type self-destructive syringe. Background Art
[0002] Syringes are the most commonly used medical devices, mainly using needles to extract or inject gases or liquids. Syringes cannot be reused, but they may be reused due to misuse, resulting in cross infection and medical accidents. In order to avoid such incidents, used syringes need to be destroyed.
[0003] In the prior art, the recycled syringes are removed and replaced with new plungers before being repackaged and sold, which may cause serious cross infection to patients. Therefore, in order to solve the above problem, a retractable self-destructive syringe needs to be developed. Utility Model Content
[0004] In view of the shortcomings of the above-mentioned existing production technology, the present application provides a retractable split self-destructive syringe, which can pull the injection needle after injection back into the syringe and cannot be easily disassembled, thereby avoiding cross-infection problems caused by the secondary recycling of the used needle.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A retractable split self-destructive syringe comprises a syringe and a push rod, wherein the front portion of the push rod extends into the inner cavity of the syringe and can slide forward and backward along the syringe, a needle seat is arranged at the front end portion of the inner cavity of the syringe, an injection needle is fixed at the center position of the needle seat, the upper end of the injection needle extends out of the needle seat and the syringe, the rear end of the needle seat is clamped and connected to the upper end of a socket, the outer side surface of the socket is clamped and connected to the inner wall of the syringe, an elastic clamping joint is arranged at the upper end of the push rod, the elastic clamping joint of the push rod can be clamped with the lower end of the socket, the friction force between the socket and the needle seat is greater than the friction force between the needle seat and the syringe, and the push rod can pull the injection needle back into the syringe; an elastic sealing sleeve is sleeved on the push rod, and at least one radially protruding fourth elastic convex ring is arranged on the outer surface of the elastic sealing sleeve, and the fourth elastic convex ring is in pressing contact with the inner cavity wall of the syringe.
[0007] Furthermore, the front end of the syringe is sleeved with a sheath, and the sheath can cover the injection needle exposed outside the syringe.
[0008] Furthermore, a first positioning step is provided at the front end of the inner cavity of the syringe, and a second positioning step is provided on the needle seat. The first positioning step and the second positioning step are in vertical contact with each other to achieve positioning installation of the needle seat.
[0009] Furthermore, at least one radially protruding first elastic convex ring is provided on the outer surface of the lower end of the needle seat, and at least one radially protruding second elastic convex ring is provided on the inner cavity wall of the upper end of the connecting sleeve. The lower end of the needle seat extends into the inner cavity of the upper end of the connecting sleeve, the first elastic convex ring is in press-contact with the inner cavity wall of the connecting sleeve, the second elastic convex ring is in press-contact with the outer surface of the needle seat, and at least one radially protruding third elastic convex ring is provided on the outer surface of the connecting sleeve, and the third elastic convex ring is in press-contact with the inner cavity wall of the syringe, thereby realizing a clamping connection between the connecting sleeve and the needle seat.
[0010] Furthermore, a third positioning step is provided on the needle seat, and a fourth positioning step is provided on the connecting sleeve. The third positioning step and the fourth positioning step are in vertical contact with each other to achieve positioning installation of the connecting sleeve.
[0011] Furthermore, a clamping step is provided in the inner cavity of the socket, the lower end diameter of the elastic clamping joint is larger than the upper end diameter, and the rear end surface of the elastic clamping joint is in vertical contact with the clamping step to achieve clamping of the socket and the elastic clamping joint.
[0012] Furthermore, a deformation groove is arranged on the surface of the elastic card joint, and the deformation groove extends from the upper end surface of the elastic card joint to the lower part of the elastic card joint.
[0013] Furthermore, an upper limit plate and a lower limit plate are arranged on the upper and lower parts of the push rod, the diameters of the upper limit plate and the lower limit plate are larger than the diameter of the upper rod body of the push rod, a limit cavity is arranged in the middle part of the inner cavity of the elastic sealing sleeve, the diameter of the limit cavity is larger than the opening diameters of the upper and lower ends of the inner cavity of the elastic sealing sleeve, the upper limit plate and the lower limit plate are located in the limit cavity, the upper end of the upper limit plate contacts the upper end surface of the limit cavity, and the lower end of the lower limit plate contacts the lower end surface of the limit cavity.
[0014] Furthermore, a recessed breaking groove is provided on the middle surface of the push rod along the circumferential direction, and the cross-sectional area of the rod body at the position of the breaking groove is smaller than the cross-sectional area of the upper and lower rod bodies of the push rod.
[0015] The beneficial effects of the utility model are as follows:
[0016] The push rod of the utility model can be broken and destroyed through the breaking groove, and the needle can be retracted into the syringe after injection and cannot be easily disassembled, thereby avoiding the cross infection problem caused by the secondary recycling of the used needle; the utility model adopts a connecting sleeve to be respectively connected with the elastic connecting joint and the needle seat, and the structural forming of each component is more convenient, and the components are not easy to be deformed and damaged when retracting and pulling. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a front view half-section view of the utility model.
[0018] Figure 2 It is a half-section view of the syringe of the present utility model.
[0019] Figure 3 It is the front view of the push rod of the utility model.
[0020] Figure 4 It is a half-section view of the needle seat of the present utility model.
[0021] Figure 5 It is a half-section view of the connecting sleeve of the present utility model.
[0022] Figure 6 It is a half-section view of the elastic sealing sleeve of the utility model.
[0023] Wherein: 1. syringe; 2. push rod; 3. needle seat; 4. connecting sleeve; 5. elastic sealing sleeve; 6. injection needle; 7. sheath; 8. elastic clamping joint; 9. first positioning step; 10. second positioning step; 11. first elastic convex ring; 12. second elastic convex ring; 13. third elastic convex ring; 14. third positioning step; 15. fourth positioning step; 16. deformation groove; 17. clamping step; 18. fourth elastic convex ring; 19. upper limit plate; 20. lower limit plate; 21. limit cavity; 22. breaking groove. DETAILED DESCRIPTION
[0024] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.
[0025] like Figure 1 As shown, a retractable split self-destructive syringe comprises a syringe 1 and a push rod 2, the front part of the push rod 2 extends into the inner cavity of the syringe 1 and can slide forward and backward along the syringe 1. A needle seat 3 is arranged at the front end of the inner cavity of the syringe 1, and there is a clearance fit between the outer surface of the needle seat 3 and the inner cavity wall of the syringe 1. An injection needle 6 is fixed at the center position of the needle seat 3, and the upper end of the injection needle 6 extends out of the needle seat 3 and the syringe 1.
[0026] like Figure 1 As shown, the front end of the syringe 1 is sleeved with a sheath 7, and the sheath 7 can cover the injection needle 6 exposed outside the syringe 1 to prevent the injection needle 6 from accidentally injuring people.
[0027] like Figure 2 and Figure 4 As shown, a first positioning step 9 is provided at the front end of the inner cavity of the syringe 1, and a second positioning step 10 is provided on the needle seat 3. The first positioning step 9 and the second positioning step 10 are in contact with each other up and down to realize the positioning installation of the needle seat 3.
[0028] like Figure 1As shown, the rear end of the needle seat 3 is clamped and connected to the upper end of the sleeve 4, and the outer side of the sleeve 4 is clamped and connected to the inner side wall of the syringe 1, and the sleeve 4 can limit the needle seat 3 to the front end of the syringe 1. An elastic clamping joint 8 is provided at the upper end of the push rod 2. When the push rod 2 is pushed to the top in the syringe 1, the elastic clamping joint 8 of the push rod 2 can be clamped with the lower end of the sleeve 4. When the elastic clamping joint 8 and the sleeve 4 are in the clamped state, pulling back the push rod 2 can drive the sleeve 4 to move backward relative to the syringe 1. Since the friction between the sleeve 4 and the needle seat 3 is greater than the friction between the needle seat 3 and the syringe 1, the sleeve 4 drives the needle seat 3 to move backward relative to the syringe 1, and finally the injection needle 6 exposed outside the syringe 1 is pulled back into the syringe 1.
[0029] like Figure 4 and Figure 5 As shown, a radially protruding first elastic convex ring 11 is provided on the outer surface of the lower end of the needle seat 3, and a radially protruding second elastic convex ring 12 is provided on the inner cavity wall of the upper end of the connecting sleeve 4. The lower end of the needle seat 3 extends into the inner cavity of the upper end of the connecting sleeve 4, the first elastic convex ring 11 is pressed and contacted with the inner cavity wall of the connecting sleeve 4, and the second elastic convex ring 12 is pressed and contacted with the outer surface of the needle seat 3, so as to realize the clamping connection between the needle seat 3 and the connecting sleeve 4.
[0030] like Figure 5 As shown, two radially protruding third elastic convex rings 13 are provided on the outer surface of the connecting sleeve 4 , and the two third elastic convex rings 13 are in tight contact with the inner cavity wall of the syringe 1 , so as to realize the clamping connection between the connecting sleeve 4 and the needle seat 3 .
[0031] like Figure 4 and Figure 5 As shown, the needle seat 3 is provided with a third positioning step 14 , and the connecting sleeve 4 is provided with a fourth positioning step 15 . The third positioning step 14 and the fourth positioning step 15 are in vertical contact with each other to achieve positioning and installation of the connecting sleeve 4 .
[0032] like Figure 3 and Figure 5 As shown, a clamping step 17 is provided in the inner cavity of the socket 4, the lower end diameter of the elastic clamp joint 8 is larger than the upper end diameter, and the rear end surface of the elastic clamp joint 8 is in vertical contact with the clamping step 17 to achieve clamping of the socket 4 and the elastic clamp joint 8.
[0033] like Figure 3 and Figure 5 As shown, a deformation groove 16 is provided on the surface of the elastic clamp joint 8, and the deformation groove 16 extends from the upper end surface of the elastic clamp joint 8 to the lower part of the elastic clamp joint 8. The deformation groove 16 divides the elastic clamp joint 8 into two. The setting of the deformation groove 16 enables the elastic clamp joint 8 to undergo radial deformation.
[0034] like Figure 1As shown, the push rod 2 is sleeved with an elastic sealing sleeve 5, and two radially protruding fourth elastic convex rings 18 are arranged on the outer surface of the elastic sealing sleeve 5, and the fourth elastic convex rings 18 are in tight contact with the inner cavity wall of the syringe 1. The elastic sealing sleeve 5 can seal the liquid in the inner cavity of the syringe 1, and the liquid in the syringe 1 is pressed into the injection needle 6 by the push of the push rod 2.
[0035] like Figure 3 and Figure 6 As shown, an upper limit plate 19 and a lower limit plate 20 are arranged on the upper part of the push rod 2, and the diameters of the upper limit plate 19 and the lower limit plate 20 are larger than the diameter of the upper rod body of the push rod 2. A limit cavity 21 is arranged in the middle of the inner cavity of the elastic sealing sleeve 5, and the diameter of the limit cavity 21 is larger than the diameters of the upper and lower openings of the inner cavity of the elastic sealing sleeve 5. The upper limit plate 19 and the lower limit plate 20 are located in the limit cavity 21, and the upper end of the upper limit plate 19 contacts the upper end surface of the limit cavity 21, and the lower end of the lower limit plate 20 contacts the lower end surface of the limit cavity 21.
[0036] like Figure 3 As shown, a recessed breaking groove 22 is provided on the middle surface of the push rod 2 along the circumferential direction, and the cross-sectional area of the rod body at the position of the breaking groove 22 is smaller than the cross-sectional area of the upper and lower rod bodies of the push rod 2. The push rod 2 is more likely to break when subjected to external force at the position of the breaking groove 22.
[0037] The working principle of the utility model is as follows: when the syringe is used for injection, the elastic clamping joint 8 of the push rod 2 and the receiving sleeve 4 are in a separated state, and the injection of the injection liquid is completed by pushing the push rod 2. When the injection is completed, the push rod 2 is pushed upward to the top, and the elastic clamping joint 8 of the push rod 2 can be clamped with the lower end of the receiving sleeve 4. When the elastic clamping joint 8 and the receiving sleeve 4 are in the clamped state, the push rod 2 can be pulled back to drive the receiving sleeve 4 to move backward relative to the syringe 1. Since the friction between the receiving sleeve 4 and the needle seat 3 is greater than the friction between the needle seat 3 and the syringe 1, the receiving sleeve 4 drives the needle seat 3 to move backward relative to the syringe 1, and finally the injection needle 6 exposed outside the syringe 1 is retracted into the syringe 1. At this time, the breaking groove 22 of the push rod 2 is exposed outside the syringe 1, and then a breaking force is applied to the rod body at the position of the breaking groove 22. Under the action of external force, the rear section of the push rod 2 is broken and destroyed. At this time, the injection needle 6 is located in the syringe 1 and cannot be easily disassembled and taken out, thereby avoiding the cross infection problem caused by the secondary recycling of the used needle.
[0038] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.
Claims
1. A retractable split self-destructive syringe, comprising a syringe (1) and a push rod (2), wherein the front portion of the push rod (2) extends into the inner cavity of the syringe (1) and can slide forward and backward along the syringe (1), a needle seat (3) is arranged at the front end of the inner cavity of the syringe (1), an injection needle (6) is fixed at the center position of the needle seat (3), and the upper end of the injection needle (6) extends out of the needle seat (3) and the syringe (1), characterized in that: The rear end of the needle seat (3) is clamped and connected to the upper end of the sleeve (4), the outer side surface of the sleeve (4) is clamped and connected to the inner wall of the syringe (1), the upper end of the push rod (2) is provided with an elastic clamping joint (8), the elastic clamping joint (8) of the push rod (2) can be clamped with the lower end of the sleeve (4), the friction force between the sleeve (4) and the needle seat (3) is greater than the friction force between the needle seat (3) and the syringe (1), and the push rod (2) can pull the injection needle (6) back into the syringe (1); the push rod (2) is sleeved with an elastic sealing sleeve (5), and at least one radially protruding fourth elastic convex ring (18) is provided on the outer surface of the elastic sealing sleeve (5), and the fourth elastic convex ring (18) is in tight contact with the inner cavity wall of the syringe (1).
2. A retractable split self-destructing syringe as claimed in claim 1, characterized in that: The front end of the syringe (1) is sleeved with a sheath (7), and the sheath (7) is capable of covering the injection needle (6) exposed outside the syringe (1).
3. A retractable split self-destructing syringe as claimed in claim 1, characterized in that: A first positioning step (9) is provided at the front end of the inner cavity of the syringe (1), and a second positioning step (10) is provided on the needle seat (3); the first positioning step (9) and the second positioning step (10) are in contact with each other up and down, thereby achieving positioning and installation of the needle seat (3).
4. A retractable split self-destructing syringe as claimed in claim 1, characterized in that: The outer surface of the lower end of the needle seat (3) is provided with at least one radially protruding first elastic convex ring (11), and the inner cavity wall of the upper end of the connecting sleeve (4) is provided with at least one radially protruding second elastic convex ring (12). The lower end of the needle seat (3) extends into the inner cavity of the upper end of the connecting sleeve (4). The first elastic convex ring (11) and the inner cavity wall of the connecting sleeve (4) are in tight contact with each other, and the second elastic convex ring (12) and the outer surface of the needle seat (3) are in tight contact with each other. The outer surface of the connecting sleeve (4) is provided with at least one radially protruding third elastic convex ring (13). The third elastic convex ring (13) and the inner cavity wall of the syringe (1) are in tight contact with each other, thereby realizing a clamping connection between the connecting sleeve (4) and the needle seat (3).
5. A retractable split self-destructing syringe as claimed in claim 1, characterized in that: A third positioning step (14) is provided on the needle seat (3), and a fourth positioning step (15) is provided on the connecting sleeve (4); the third positioning step (14) and the fourth positioning step (15) are in contact with each other up and down, thereby achieving positioning installation of the connecting sleeve (4).
6. A retractable split self-destructing syringe as claimed in claim 1, characterized in that: The inner cavity of the connecting sleeve (4) is provided with a clamping step (17); the diameter of the lower end of the elastic clamping joint (8) is larger than the diameter of the upper end; the rear end surface of the elastic clamping joint (8) and the clamping step (17) are in vertical contact, thereby achieving clamping connection between the connecting sleeve (4) and the elastic clamping joint (8).
7. A retractable split self-destructing syringe as claimed in claim 6, characterized in that: A deformation groove (16) is provided on the surface of the elastic card joint (8), and the deformation groove (16) extends from the upper end surface of the elastic card joint (8) to the lower part of the elastic card joint (8).
8. A retractable split self-destructing syringe as claimed in claim 1, characterized in that: An upper limit plate (19) and a lower limit plate (20) are arranged on the upper and lower parts of the push rod (2); the diameters of the upper limit plate (19) and the lower limit plate (20) are larger than the diameter of the upper rod body of the push rod (2); a limit cavity (21) is arranged in the middle of the inner cavity of the elastic sealing sleeve (5); the diameter of the limit cavity (21) is larger than the diameters of the upper and lower openings of the inner cavity of the elastic sealing sleeve (5); the upper limit plate (19) and the lower limit plate (20) are located in the limit cavity (21); the upper end of the upper limit plate (19) contacts the upper end surface of the limit cavity (21); and the lower end of the lower limit plate (20) contacts the lower end surface of the limit cavity (21).
9. A retractable split self-destructing syringe according to any one of claims 1 to 8, characterized in that: A recessed breaking groove (22) is provided on the middle surface of the push rod (2) along the circumferential direction, and the cross-sectional area of the rod body at the position of the breaking groove (22) is smaller than the cross-sectional areas of the upper and lower rod bodies of the push rod (2).