CN211188576U

CN211188576U - Self-destruction syringe

Info

Publication number: CN211188576U
Application number: CN201921487104.4U
Authority: CN
Inventors: 马炜
Original assignee: Lanzhou Xinwang Medical Engineering Co ltd
Current assignee: Lanzhou Xinwang Medical Engineering Co ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-08-07
Anticipated expiration: 2029-09-09

Abstract

The utility model discloses a self-destruction syringe relates to medical instrument technical field, solved current self-destruction syringe and not have to the syringe needle carry out the self-destruction and the incomplete problem of self-destruction function that exists, the utility model discloses a cylinder, syringe needle and the push rod of taking the piston, the syringe needle includes that the needle body and the cover that run through the syringe bottom from inside to outside establish the fixed block that the needle body is located cylinder one end, fixed block one side is provided with the compact heap that compresses tightly the syringe needle, be connected with the plastic line between compact heap edge and the fixed block lateral wall, the diameter of compact heap is the same with the cylinder internal diameter and is greater than the diameter of fixed block, the injection hole that corresponds with the needle body is seted up at the compact heap center, compact heap one side is the piston, be provided with spherical fixture block on the piston terminal surface, the compact heap surface be provided with can be spherical draw-in groove with fixture block complex inside, the cylinder is close to the compact heap and all be provided with on Elastic clamping structure.

Description

Self-destruction syringe

Technical Field

The utility model relates to the technical field of medical equipment, more specifically relates to a self-destruction syringe.

Background

A syringe is an important medical device for injection treatment of drugs. Since the injection therapy is intravenous injection, the injector may contact the blood of the patient, especially the needle of the injector, and further the germs possibly contained in the blood of the patient may enter the injector. Therefore, in order to prevent the transmission of germs between different patients through the syringes, most of the existing syringes are disposable, and are recycled and destroyed after one-time use. However, the disposable is disposable and not functional, and there are still some lawless persons who can recycle the used syringe for secondary use.

Based on the reasons, the self-destruction type injector is produced, the injector cannot be used after being used once, and the disposable injector is functionally realized, so that the problem of secondary recycling is solved. However, the self-destruction structure of the syringe has certain defects, most of the self-destruction structures are provided with a limiting structure in the syringe, and the piston and the push rod are blocked after the syringe is used for one time through the limiting structure, so that the self-destruction of the injection function of the syringe is realized. However, the most important parts of the syringe are not the needle head but the needle barrel and the piston, and the current self-destruction syringes have no self-destruction structure aiming at the needle head. Lawless persons can easily obtain the injection needle, and other substitutes can be easily found by adding components such as a needle cylinder, a piston and the like, so that the self-destruction function of the existing self-destruction type injector is not perfect.

Meanwhile, in the normal recovery and destruction process of the injector, the needles of the existing conventional injector and the self-destruction injector are exposed, so that certain potential safety hazards exist, and recovery personnel are easily stabbed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that the self-destruction function of the existing self-destruction syringe is incomplete because the needle head is not self-destroyed, the utility model provides a self-destruction syringe.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides a self-destruction syringe, which comprises a needle tube, syringe needle and the push rod of taking the piston, the syringe needle includes that the needle body and the cover that run through the syringe bottom from inside to outside establish the fixed block that the needle body is located the syringe one end, fixed block one side is provided with the compact heap that compresses tightly the syringe needle, be connected with the plastic wire between compact heap edge and the fixed block lateral wall, the diameter of compact heap is the same with the cylinder internal diameter and is greater than the diameter of fixed block, the injection hole that corresponds with the needle body is seted up at the compact heap center, compact heap one side is the piston, be provided with spherical fixture block on the piston terminal surface, the compact heap surface be provided with can be spherical draw-in groove with fixture block complex inside, the cylinder is close to the compact heap and all is provided with the elasticity joint structure that is.

Furthermore, the bottom surface inside the syringe is provided with a conical boss protruding towards the opening direction of the syringe, the needle body penetrates through the center of the boss, the end face of the boss is in close contact with the end face of the fixed block, and the boss is made of elastic plastic.

Furthermore, an end plate is arranged on the end face of one side, close to the pressing block, of the piston, the diameter of the end plate is the same as the inner diameter of the needle cylinder, and the clamping block is arranged on the surface of the end plate.

Furthermore, the elastic clamping structure comprises an elastic bulge and a groove which is arranged on the inner wall of the needle cylinder and used for accommodating the elastic bulge, one end of the elastic bulge is fixedly connected with the inner wall of the groove close to one side of the opening of the needle cylinder, and the other end of the elastic bulge is in a free state tilting towards the center of the needle cylinder.

Further, the diameter of the fixing block is not more than half of the inner diameter of the needle cylinder.

The utility model has the advantages as follows:

the utility model arranges the needle head in a built-in type, is installed from the inside of the needle cylinder to the outside, can withdraw the needle head to the inside of the needle cylinder after the injector is used, and limits the push rod, the piston and the needle head in the needle cylinder by limiting the piston by the elastic clamping structure at the opening of the needle cylinder, thereby realizing the self-destruction of all injection parts of the injector and avoiding the easy acquisition of the needle head by lawless persons; meanwhile, the needle head is retracted into the syringe after the syringe is self-destructed, so that the damage to normal recovery personnel caused by the exposed needle head is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention in normal use;

FIG. 2 is a schematic structural view of the self-destruction device of the present invention;

reference numerals: 1-elastic clamping structure, 1.1-elastic bulge, 1.2-groove, 2-syringe, 3-push rod, 4-piston, 5-clamping block, 6-clamping groove, 7-plastic wire, 8-boss, 9-needle, 9.1-fixing block, 9.2-needle body, 10-injection hole, 11-pressing block and 12-end plate.

Detailed Description

For a better understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and the following embodiments.

Example 1

A self-destruction injector comprises a syringe 2, the needle head 9 and the push rod 3 with the piston 4, the needle head 9 includes a needle body 9.2 which penetrates through the bottom of the syringe 2 from inside to outside and a fixed block 9.1 which is sleeved at one end of the needle body 9.2 in the syringe 2, a pressing block 11 which presses the needle head 9 is arranged on one side of the fixed block 9.1, a plastic wire 7 is connected between the edge of the pressing block 11 and the side wall of the fixed block 9.1, the diameter of the pressing block 11 is the same as the inner diameter of the syringe 2 and is larger than that of the fixed block 9.1, an injection hole 10 corresponding to the needle body 9.2 is arranged in the center of the pressing block 11, the piston 4 is arranged on one side of the pressing block 11, a spherical clamping block 5 is arranged on the end face of the piston 4, a spherical clamping groove 6 which can be matched with the clamping block 5 is arranged on the surface of the pressing block 11, and two inner walls close to the opening of the syringe 2.

The working principle is as follows: the structure of the injector is shown in figure 1 when the injector is normally used, at this time, the pressing block 11 presses the fixing block 9.1 under the action of the elastic clamping structure 1, the fixing block 9.1 is tightly attached to the bottom of the syringe 2, the needle body 9.2 penetrates through the center of the bottom of the syringe 2 to the outside, and the whole needle head 9 is kept fixed relative to the syringe 2. The push-and-pull push rod 3 and the piston 4 can be integrally pushed and pulled to suck and inject the injection, and the injection passes through the injection hole 10 and the needle body 9.2 during suction and injection.

When the injection of the injector is finished, the clamping block 5 on the end face of the piston 4 is contacted with the bayonet of the clamping groove 6 on the pressing block 11, and the clamping block 5 and the clamping groove 6 are both spherical, so the diameter of the clamping block 5 is slightly larger than that of the bayonet of the clamping groove 6, and the clamping block 5 can be blocked by the bayonet. However, the pressing block 11 is made of plastic and has certain elasticity, so that the push rod 3 is further pushed forcibly, the bayonet of the clamping groove 6 is locally elastically deformed, and the clamping block 5 is smoothly clamped into the clamping groove 6. In the process of pushing the push rod 3 to enable the clamping block 5 to be clamped into the clamping groove 6, the edge of the piston 4 is in contact with and extruded by the elastic clamping structure 1, and the elastic clamping structure 1 retracts to release the limit of the pressing block 11. After the clamping block 5 is clamped into the clamping groove 6, the piston 4 and the pressing block 11 are connected into a whole, the limit of the elastic clamping structure 1 on the pressing block 11 is released, the push rod 3 is pulled outwards, the pressing block 11 integrally pulls the needle head 9 outwards through the plastic wire 7, and then the needle body 9.2 is gradually pulled from outside to inside to be retracted into the needle cylinder 2.

After the needle body 9.2 is completely retracted into the syringe 2, since the pressing block 11 is connected with the fixing block 9.1 through the flexible plastic wire 7, the plastic wire 7 does not have a rigid support function, and the plastic wire 7 is connected with the side surface of the fixing block 9.1, the needle body 9.2 can be inclined in the syringe 2 under the action of gravity, and then the needle point is staggered with the bottom center of the syringe 2, as shown in fig. 2 of the attached drawing. As the needle holes at the centers of the needle body 9.2 and the bottom of the syringe 2 are very small, once the needle holes are staggered with each other and have no external rigid support, the needle bodies can not be corresponded again basically, and further the needle bodies 9.2 can not penetrate out through the center of the bottom of the syringe 2 again. And, because the elastic clamping structure 1 at the opening of the syringe 2 limits the piston 4, the piston 4 and the push rod 3 can not be drawn out of the syringe 2 integrally, and then the piston 4, the push rod 3 and the needle 9 can only be positioned in the syringe 2, thereby realizing the self-destruction of the piston 4, the push rod 3 and the needle 9.

When the syringe is assembled, the needle head 9, the pressing block 11 and the piston 4 are sequentially placed into the syringe 2 from the opening of the syringe 2, and the elastic clamping structure 1 has a one-way clamping function and can only be inserted into the syringe.

Example 2

The embodiment is improved on the basis of embodiment 1:

the bottom surface department of the inside of syringe 2 is provided with the bellied toper boss 8 of direction of syringe 2 opening, and needle body 9.2 runs through the boss 8 center, and 8 terminal surfaces of boss and the 9.1 terminal surfaces in close contact with of fixed block, and boss 8 adopts and uses elastic plastics to make. The conical projection 8 raises the central position of the bottom of the syringe above the edge position thereof, which further prevents the needle body 9.2 from re-corresponding to the needle hole in the center of the bottom of the syringe 2. Meanwhile, the boss 8 is made of elastic plastic, so that a certain moving space is provided for the matching of each structure in the needle cylinder 2.

An end plate 12 is arranged at the end face of one side of the piston 4 close to the pressing block 11, the diameter of the end plate 12 is the same as the inner diameter of the needle cylinder 2, and the fixture block 5 is arranged on the surface of the end plate 12. The piston 4 is generally made of rubber materials, the texture of the piston is soft, and further the elastic clamping structure 1 at the position of the pressing block 11 may not be completely retracted, so an end plate 12 is arranged on the end surface of the piston 4, the end plate 12 is made of hard materials the same as the needle cylinder 2, and the elastic clamping structure 1 can be completely retracted through the end plate 12.

Elastic clamping structure 1 includes elastic bulge 1.1 and sets up recess 1.2 that is used for holding elastic bulge 1.1 on 2 inner walls of cylinder, and elastic bulge 1.1 one end is close to the inner wall fixed connection of 2 opening sides of cylinder, the other end for the free state to 2 central perk of cylinder with recess 1.2. When piston 4, compact heap 11 are inwards installed, can extrude in elastic bulge 1.1 to recess 1.2, and then piston 4 and compact heap 11 can normally pass through and install, and after piston 4 and compact heap 11 passed through, elastic bulge 1.1 popped out again and then play the limiting action of outside removal.

The diameter of the fixing block 9.1 is not more than half of the inner diameter of the needle cylinder 2, and the diameter of the fixing block 9.1 is set to avoid the fixing block 9.1 from blocking the inclination of the needle 9 in the needle cylinder 2.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-destruction injector, comprising a syringe (2), a needle (9) and a push rod (3) with a piston (4), characterized in that: the needle head (9) comprises a needle body (9.2) penetrating through the bottom of the needle cylinder (2) from inside to outside and a fixed block (9.1) sleeved at one end of the needle body (9.2) located in the needle cylinder (2), a pressing block (11) pressing the needle head (9) is arranged on one side of the fixed block (9.1), a plastic wire (7) is connected between the edge of the pressing block (11) and the side wall of the fixed block (9.1), the diameter of the pressing block (11) is the same as the inner diameter of the needle cylinder (2) and is larger than that of the fixed block (9.1), an injection hole (10) corresponding to the needle body (9.2) is formed in the center of the pressing block (11), a piston (4) is arranged on one side of the pressing block (11), a spherical clamping block (5) is arranged on the end face of the piston (4), a spherical clamping groove (6) capable of being matched with the clamping block (5) and being internally spherical is arranged on the surface of the pressing block (11), and clamping grooves (11) close to two inner walls of the opening and an elastic clamping structure (1) of the cylinder (2).

2. The self-destructing syringe according to claim 1, wherein: the bottom surface department of cylinder (2) inside is provided with the bellied toper boss (8) of direction of cylinder (2) opening, and needle body (9.2) run through boss (8) center, and boss (8) terminal surface and fixed block (9.1) terminal surface in close contact with, and boss (8) adopt to make with elastic plastics.

3. The auto-disable syringe of claim 1 or claim 2, wherein: an end plate (12) is arranged on the end face of one side, close to the pressing block (11), of the piston (4), the diameter of the end plate (12) is the same as the inner diameter of the needle cylinder (2), and the fixture block (5) is arranged on the surface of the end plate (12).

4. The self-destructing syringe according to claim 1, wherein: the elastic clamping structure (1) comprises an elastic bulge (1.1) and a groove (1.2) which is arranged on the inner wall of the needle cylinder (2) and used for accommodating the elastic bulge (1.1), one end of the elastic bulge (1.1) is fixedly connected with the inner wall of the groove (1.2) close to one side of the opening of the needle cylinder (2), and the other end of the elastic bulge is in a free state of tilting towards the center of the needle cylinder (2).

5. The self-destructing syringe according to claim 1, wherein: the diameter of the fixed block (9.1) is not more than half of the inner diameter of the needle cylinder (2).