Safety injection needle capable of avoiding secondary use
By introducing a guide rod and cutting knife into the injection needle, the piston is ensured to be cut after the liquid is fed, which solves the cross-infection problem caused by reuse of the syringe and achieves the purpose of safe injection.
Patent Information
- Application Number
- CN202421553232.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-07-03
AI Technical Summary
Existing syringes are prone to reuse, resulting in an increased risk of cross-infection.
A safe injection needle is designed, including a syringe, needle and propeller assembly, which uses the cooperation of the guide rod and the cutting knife to ensure that the piston is cut after the liquid is fed, preventing the equipment from being reused.
Effectively prevent the secondary use of injection needles, reduce the risk of cross-infection, and ensure safe use.
Smart Images
Figure CN223196390U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, and particularly relates to a safety injection needle that avoids secondary use. Background Art
[0002] An injection needle is a syringe, which is a common medical tool. As early as in the 15th century, the Italian Cartinel put forward the principle of the syringe. It is mainly used to draw or inject gas or liquid with a needle;
[0003] At present, most of the syringes on the market are for single use. In real life, there are always situations where syringes are reused. Reusing syringes will increase the risk of cross-infection and is prone to be infected by bacteria when placed in the air, thus causing secondary harm to patients. Content of the Utility Model
[0004] (1) Technical Problems to be Solved
[0005] In view of the deficiencies of the prior art, the utility model provides a safety injection needle that avoids secondary use.
[0006] (2) Technical Solutions
[0007] To achieve the above object, the utility model provides the following technical solution: A safety injection needle that avoids secondary use, including a syringe barrel, a needle head and a pusher assembly. One end of the syringe barrel is provided with a storage cavity with an opening. On both sides of the syringe barrel near the opening, there are pressing plates. The other end of the syringe barrel is provided with a needle head that is communicated with the storage cavity. The pusher assembly includes a push rod, a piston, a pusher head and a guide rod. Both ends of the push rod are respectively connected to the piston and the pusher head. The push rod is also provided with a U-shaped guide rod. The outer side of the syringe barrel is provided with an inverted T-shaped guide groove. The bottom wall of the guide groove is arc-shaped. One free end of the guide rod is connected to the side wall of the push rod near one end of the pusher head, and the other free end of the guide rod is slidably connected to the guide groove. The inner wall of the storage cavity is also provided with a cutting knife. One end of the piston near the needle head is also provided with a groove adapted to the cutting knife. The piston is also provided with an arc-shaped groove arranged on the periphery of the groove. One end of the arc-shaped groove near the pusher head is provided with a ventilation hole.
[0008] To ensure the stability of the piston support, the utility model is improved in that the push rod is also provided with a support plate for supporting the piston.
[0009] Preferably, the support plate is also provided with a ventilation pipe that penetrates through the ventilation hole.
[0010] To ensure the convenience of operation, the utility model is improved in that cutting edges are provided on both the left and right sides of the cutting knife.
[0011] (3) Beneficial effects
[0012] Compared with the prior art, the present invention provides a safety injection needle that avoids secondary use and has the following beneficial effects:
[0013] The safety injection needle that prevents secondary use has a piston fixedly assembled on the push rod, and the groove of the piston is aligned with the cutting knife in the syringe. The push rod can only rotate after completing the feeding of the liquid medicine under the guidance of the guide rod. Then, the cutting knife cuts the groove and the arc groove, and the piston is no longer sealed, preventing the equipment from being used twice. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the cooperation between the propulsion assembly and the cutting knife of the utility model structure;
[0016] Figure 3 For the utility model structure Figure 2 A partial enlarged schematic diagram;
[0017] Figure 4 It is a partial schematic diagram of the structure of the utility model.
[0018] In the figure: 1. syringe; 2. needle; 3. push rod; 4. piston; 5. push head; 6. guide rod; 7. cutting knife; 8. pressing plate; 9. support plate; 10. ventilation tube. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0020] See also Figure 1-4, A safety injection needle that prevents reuse, comprising a syringe barrel 1, a needle 2, and a pusher assembly. One end of the syringe barrel 1 is provided with a storage cavity with an opening. On both sides of the syringe barrel 1 near the opening, there are pressing plates 8. The other end of the syringe barrel 1 is provided with a needle 2 that penetrates through the storage cavity. The pusher assembly includes a push rod 3, a piston 4, a pusher head 5, and a guide rod 6. Both ends of the push rod 3 are respectively connected to the piston 4 and the pusher head 5. The push rod 3 is also provided with a U-shaped guide rod 6. On the outside of the syringe barrel 1, there is an inverted T-shaped guide groove. The bottom wall of the guide groove is arc-shaped. One free end of the guide rod 6 is connected to the side wall of the push rod 3 near one end of the pusher head 5, and the other free end of the guide rod 6 is slidably connected to the guide groove. The inner wall of the storage cavity is also provided with a cutting knife 7. Near one end of the piston 4 close to the needle 2, there is a groove adapted to the cutting knife 7. On the piston 4, there is also an arc-shaped groove provided on the periphery of the groove. One end of the arc-shaped groove close to the pusher head 5 is provided with a ventilation hole.
[0021] During the actual use process, the piston 4 is fixedly assembled on the push rod 3. Initially, the piston 4 does not contact the bottom wall of the syringe barrel 1. Before the device is used, an elastic C-shaped retaining ring is provided below the pusher head 5 to prevent the bottom wall of the guide rod 6 from extending into the bottom wall of the guide groove and then rotating during the transportation of the device, resulting in the situation where the cutting knife 7 cuts open the barrier between the groove and the arc-shaped groove. When in use, the retaining ring is removed, and the push rod 3 is driven to move the piston 4 in the storage cavity by the pusher head 5 in cooperation with the pressing plate 8, and the liquid medicine sprays out from the needle 2. When the piston 4 contacts the bottom wall of the storage cavity, at this time, the guide rod 6 can rotate in the arc-shaped part of the guide groove, twisting the push rod 3, and the piston 4 is cut open by the cutting knife 7, and the groove, the arc-shaped groove, and the ventilation hole are penetrated, and the device is self-destructed.
[0022] During the actual use process, in order to ensure the stability of the installation of the piston 4, the push rod is also provided with a support plate 9 that supports the piston 4. The support plate 9 is also provided with a ventilation pipe 10 that penetrates through the ventilation hole. The piston 4 is inserted into the ventilation pipe 10, which is convenient for positioning and prevents the piston 4 from rotating relative to the extrusion rod.
[0023] In this embodiment, cutting edges are provided on both the left and right sides of the cutting knife 7 to increase the convenience of operation.
[0024] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of this application, etc., the following will be described in detail with reference to the specific examples listed and in conjunction with the attached drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.
[0025] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.
[0026] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.
[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A safety injection needle for preventing secondary use, comprising a syringe (1), a needle (2) and a pusher assembly, characterized in that: One end of the syringe barrel (1) is provided with a storage cavity with an opening. On both sides of the syringe barrel (1) near the opening, there are pressing plates (8). The other end of the syringe barrel (1) is provided with a needle head (2) that penetrates through the storage cavity. The pusher assembly includes a pusher rod (3), a piston (4), a pusher head (5), and a guide rod (6). Both ends of the pusher rod (3) are respectively connected to the piston (4) and the pusher head (5). A U-shaped guide rod (6) is also provided on the pusher rod (3). An inverted T-shaped guide groove is provided on the outer side of the syringe barrel (1). The bottom wall of the guide groove is arc-shaped. One free end of the guide rod (6) is connected to the side wall of the pusher rod (3) near one end of the pusher head (5). The other free end of the guide rod (6) is slidably connected to the guide groove. A cutting knife (7) is also provided on the inner wall of the storage cavity. A groove adapted to the cutting knife (7) is also provided at one end of the piston (4) near the needle head (2). An arc-shaped groove is also provided on the piston (4) on the periphery of the groove. A ventilation hole is provided at one end of the arc-shaped groove near the pusher head (5).
2. The safety injection needle for preventing secondary use according to claim 1, characterized in that: A support plate (9) for supporting the piston (4) is also provided on the pusher rod.
3. The safety injection needle for preventing secondary use according to claim 2, characterized in that: A ventilation pipe (10) penetrating through the ventilation hole is also provided on the support plate (9).
4. The safety injection needle for preventing secondary use according to claim 3, characterized in that: Cutting edges are provided on both the left and right sides of the cutting knife (7).