CN219049855U

CN219049855U - Residue-free self-destruction injector

Info

Publication number: CN219049855U
Application number: CN202222526727.6U
Authority: CN
Inventors: 车俊男
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-05-23
Anticipated expiration: 2032-09-23

Abstract

A residue-free self-destruction injector belongs to the technical field of medical appliances. The injector comprises a needle cylinder (1), a needle seat (3) and a push rod (7), wherein the needle seat (3) is arranged at the front end of the needle cylinder (1), the push rod (7) is arranged in the needle cylinder (1) in a sliding manner, a clamping groove (5) is formed in the side wall of the needle seat (3), and a clamping protrusion (6) corresponding to the clamping groove (5) is arranged at the front end of the push rod (7), and the injector is characterized in that: the liquid blocking device further comprises a liquid blocking unit, the liquid blocking unit seals the inner opening of the clamping groove (5), and the clamping protrusion (6) can push the liquid blocking unit to move towards the inner side of the clamping groove (5). Utilize the inboard opening of blocking liquid unit seal joint groove (5), in the liquid medicine in cylinder (1) can't get into joint groove (5), can promote to block liquid unit to the inboard removal of joint groove (5) when joint arch (6) move to joint groove (5) department along with push rod (7) to can avoid the liquid medicine to remain in joint groove (5), reduce the liquid medicine extravagant.

Description

Residue-free self-destruction injector

Technical Field

A residue-free self-destruction injector belongs to the technical field of medical appliances.

Background

The existing injector is convenient for safely and conveniently handling the medical waste of the injector in the follow-up process, a clamping groove for fixing the push rod is formed in the fixing seat of the needle head, the clamping groove is used for fixing a barb body of the push rod, the barb body is clamped into the clamping groove after push rod pushing is completed, and the needle head can be pulled into the needle cylinder in the process of pulling back the push rod.

The inventor of the present application filed an utility model patent with the application number 201821854971.2 and the name of an injector, and the injector is provided with a conical sealing table at the front side of a fixing seat, so that the length of a clamping groove is reduced, and the residual quantity of liquid medicine is reduced. However, in the actual use process, the clamping groove still stores a certain amount of liquid medicine, and the part of liquid medicine cannot be pushed out of the needle tube, so that the liquid medicine is wasted.

Disclosure of Invention

The utility model aims to solve the technical problems that: overcomes the defects of the prior art, provides a residual-free self-destruction injector, avoids residual liquid medicine in a clamping groove, and reduces the waste of the liquid medicine.

The technical scheme adopted for solving the technical problems is as follows: this no residual self-destruction syringe, including cylinder, needle file and push rod, the needle file sets up in the cylinder front end, and the push rod slides and sets up in the cylinder, is equipped with the joint groove on the lateral wall of needle file, and the push rod front end is equipped with the joint arch corresponding with the joint groove, its characterized in that: the liquid blocking unit seals the opening of the inner side of the clamping groove, and the clamping protrusion can push the liquid blocking unit to move towards the inner side of the clamping groove.

Preferably, the liquid blocking unit is a tongue-shaped liquid blocking piece arranged at the opening of the inner side of the clamping groove, one end of the tongue-shaped liquid blocking piece is connected with one end of the clamping groove far away from the push rod, and the other end and two sides of the tongue-shaped liquid blocking piece are respectively arranged with the needle seat.

Preferably, the thickness of the tongue-shaped liquid blocking piece gradually decreases along the direction close to the push rod, and the front end of the tongue-shaped liquid blocking piece is thick and the rear end of the tongue-shaped liquid blocking piece is thin, so that the tongue-shaped liquid blocking piece can not deform due to the pressure of liquid medicine in the process of pushing and injecting the liquid medicine, has enough stability, and can be extruded to the inner side of the clamping groove smoothly when the clamping protrusion reaches the clamping groove, so that the clamping protrusion is clamped in the clamping groove smoothly.

Preferably, in order to ensure that the medicine liquid in the syringe is kept as little as possible, the inner side surface of the tongue-shaped liquid blocking piece is flush with the inner surface of the needle seat.

Preferably, the liquid blocking unit is a liquid blocking elastomer filled in the clamping groove, and the liquid blocking elastomer is made of a non-water-absorbing material.

The non-water absorbing material may be rubber.

Preferably, the liquid-blocking elastomer is provided with a plurality of through holes, and the through holes are arranged along the axial direction of the needle cylinder.

Preferably, a clamping block is arranged at one side of the opening at the inner side of the clamping groove, which is close to the push rod, and a clamping inclined surface corresponding to the clamping block is arranged on the clamping protrusion.

Compared with the prior art, the technical scheme of the residue-free self-destruction injector has the beneficial effects that:

the application utilizes the inboard opening in the sealed joint groove of liquid blocking unit, and the liquid medicine in the cylinder can't get into the joint inslot, can promote the liquid blocking unit and remove to the joint inslot side when the joint arch moves to joint groove department along with the push rod, and the liquid medicine has been released this moment to can avoid the liquid medicine to remain in the joint inslot, reduce the liquid medicine extravagant.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment 1 of the residue-free self-destroying injector.

Fig. 2 is a schematic view of the hub in an embodiment.

Fig. 3 is a cross-sectional view at B-B in fig. 2.

Fig. 4 is a partial enlarged view at a in fig. 1.

Fig. 5 is a schematic diagram of the embodiment 1 after the blocking protrusion pushes the liquid blocking unit to move toward the inner side of the blocking groove.

Fig. 6 is a partial enlarged view at C in fig. 5.

Fig. 7 is a schematic structural diagram of embodiment 2 of the residue-free self-destroying injector.

Fig. 8 is a partial enlarged view at D in fig. 7.

Fig. 9 is a cross-sectional view of the liquid-repellent elastomer in example 2.

Wherein: 1. needle cylinder 2, needle head 3, needle seat 4, tongue-shaped liquid-blocking piece 5, clamping groove 6, clamping protrusion 7, push rod 8, sealing ring 9, clamping block 10, clamping inclined surface 11, needle cap 12, liquid-blocking elastomer 13 and through hole.

Detailed Description

Fig. 1 to 6 are preferred embodiments of the residue-free self-destructing syringe, and the present utility model is further described with reference to fig. 1 to 9.

Example 1

Referring to fig. 1-3, the residue-free self-destruction injector comprises a needle cylinder 1, a needle seat 3 and a push rod 7, wherein the needle seat 3 is arranged at the front end of the needle cylinder 1, the push rod 7 is arranged in the needle cylinder 1 in a sliding manner, a clamping groove 5 is formed in the side wall of the needle seat 3, a clamping protrusion 6 corresponding to the clamping groove 5 is arranged at the front end of the push rod 7, a sealing ring 8 is arranged on the push rod 7, the sealing ring 8 is arranged at the rear side of the clamping protrusion 6, and a needle cap 11 which is covered outside the needle seat 3 and the needle head 2 is further arranged at the front end of the needle cylinder 1. The push rod 7 moves forwards to push and inject the liquid medicine, and finally the clamping protrusion 6 at the front end of the push rod 7 is clamped into the clamping groove 5, the needle head 2 and the needle seat 3 are pulled into the needle cylinder 1 in the process of pulling back the push rod 7, and then the push rod 7 is broken, so that the self-destruction of the injector is realized.

Referring to fig. 4-6, in this embodiment, a tongue-shaped liquid-blocking sheet 4 is connected to the inner side of the needle holder 3, the tongue-shaped liquid-blocking sheet 4 seals the inner opening of the clamping groove 5, one end of the tongue-shaped liquid-blocking sheet 4 is connected to one end of the clamping groove 5 away from the push rod 7, and the other end and two sides of the tongue-shaped liquid-blocking sheet 4 are separately arranged with the needle holder 3, so that when the clamping protrusion 6 reaches the clamping groove 5, the clamping protrusion 6 pushes the tongue-shaped liquid-blocking sheet 4 to move towards the inner side of the clamping groove 5.

The needle seat 3 in this embodiment is made of elastic rubber, so that the needle seat 3 is fixedly connected with the needle cylinder 1 by using the elasticity of the needle seat 3, the needle seat 3 can be fixed at the front end of the needle cylinder 1 when sucking the liquid medicine, and the needle seat 3 is driven to move towards the inner side of the needle cylinder 1 in the process of clamping and pulling back the clamping and connecting protrusions 6 and the clamping and connecting grooves 5. The tongue-shaped liquid blocking piece 4 is also made of rubber material and is integrally connected with the needle seat 3. In order to ensure that the medicine liquid in the syringe 1 is remained as little as possible, the inner side surface of the tongue-shaped liquid blocking piece 4 is flush with the inner surface of the needle seat 3.

The thickness of the tongue-shaped liquid blocking piece 4 gradually decreases along the direction close to the push rod 7, and the front end of the tongue-shaped liquid blocking piece 4 is thick and the rear end is thin, so that the tongue-shaped liquid blocking piece can not be deformed due to the pressure of liquid medicine in the process of pushing and injecting the liquid medicine, has enough stability, and can be extruded to the inner side of the clamping groove 5 smoothly when the clamping bulge 6 reaches the clamping groove 5, so that the clamping bulge 6 is clamped in the clamping groove 5 smoothly.

The clamping block 9 is arranged on one side, close to the push rod 7, of the inner side opening of the clamping groove 5, the clamping block 9 is inclined from the outer side to the inner side gradually away from the push rod 7 along the radial direction, and the clamping inclined surface 10 is correspondingly arranged on the clamping bulge 6, so that the clamping bulge 6 and the needle seat 3 can be ensured to be firmly clamped, and the situation that the clamping bulge 6 and the clamping groove 5 are separated due to overlarge sliding resistance of the needle seat 3 is prevented.

The use process of the residue-free self-destruction injector is as follows:

in the state shown in fig. 1, the needle cap 11 is removed, the needle head 2 is inserted into the liquid medicine bottle, the push rod 7 is pulled to enable the liquid medicine to enter the needle cylinder 1, the needle seat 3 is fixed at the moment, the needle head 2 faces upwards after the liquid medicine is sucked, and air in the needle cylinder 1 is extruded from the needle head 2 by the push rod 7. During injection, the needle head 2 is inserted into a blood vessel or muscle, the push rod 7 is pushed inwards to complete injection, and at the moment, due to the action of the tongue-shaped liquid blocking piece 4, liquid medicine in the needle cylinder 1 cannot enter the clamping groove 5, so that the liquid medicine is prevented from being wasted due to the fact that the liquid medicine enters the clamping groove 5. When the clamping bulge 6 moves to the clamping groove 5, the clamping bulge 6 extrudes the tongue-shaped liquid blocking piece 4 to move towards the inside of the clamping groove 5, and the clamping bulge 6 and the clamping groove 5 are clamped to complete injection. The push rod 7 is pulled and drives the needle head 2 and the needle seat 3 to enter the syringe 1, and finally the push rod 7 is broken.

Example 2

Referring to fig. 7-9, in the present embodiment, the liquid-blocking elastomer 12 is filled in the clamping groove 5, and the liquid-blocking elastomer 12 is made of a non-water-absorbing material, and since the liquid-blocking elastomer 12 has filled the clamping groove 5, the liquid medicine cannot enter the clamping groove 5 during the processes of sucking the liquid medicine and injecting the liquid medicine, so as to avoid the waste of the liquid medicine. When the clamping bulge 6 moves to the clamping groove 5, the clamping bulge 6 extrudes the liquid-blocking elastic body 12, and the clamping bulge 6 compresses the liquid-blocking elastic body 12 due to the elastic characteristic of the liquid-blocking elastic body 12, so that the clamping bulge 6 is smoothly clamped into the clamping groove 5.

The liquid-blocking elastomer 12 in this embodiment is made of rubber, but may be made of other non-water-absorbing elastic materials. In order to improve the elasticity of the liquid-blocking elastomer 12, a plurality of through holes 13 can be formed in the liquid-blocking elastomer 12, and the through holes 13 are arranged along the axial direction of the needle cylinder 1, so that liquid medicine cannot enter the through holes 13, and liquid medicine waste is avoided.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. The utility model provides a no remain self-destruction syringe, includes cylinder (1), needle file (3) and push rod (7), and needle file (3) set up in cylinder (1) front end, and push rod (7) slide and set up in cylinder (1), are equipped with joint groove (5) on the lateral wall of needle file (3), and push rod (7) front end is equipped with joint protruding (6) corresponding with joint groove (5), its characterized in that: the liquid blocking device further comprises a liquid blocking unit, the liquid blocking unit seals the inner opening of the clamping groove (5), and the clamping protrusion (6) can push the liquid blocking unit to move towards the inner side of the clamping groove (5).

2. The residue free self-destructing syringe of claim 1 and further characterized by: the liquid blocking unit is a tongue-shaped liquid blocking piece (4) arranged at the opening of the inner side of the clamping groove (5), one end of the tongue-shaped liquid blocking piece (4) is connected with one end, far away from the push rod (7), of the clamping groove (5), and the other end and two sides of the tongue-shaped liquid blocking piece (4) are respectively arranged with the needle seat (3).

3. The residue free self-destructing syringe of claim 2 and further characterized by: the thickness of the tongue-shaped liquid blocking piece (4) gradually decreases along the direction approaching the push rod (7).

4. A residue free self-destructing syringe according to claim 2 or claim 3 and in which: the inner side surface of the tongue-shaped liquid blocking piece (4) is flush with the inner surface of the needle seat (3).

5. The residue free self-destructing syringe of claim 1 and further characterized by: the liquid blocking unit is a liquid blocking elastomer (12) filled in the clamping groove (5), and the liquid blocking elastomer (12) is made of a non-water-absorbing material.

6. The residue free self-destructing syringe of claim 5 and further characterized by: the liquid-blocking elastomer (12) is provided with a plurality of through holes (13), and the through holes (13) are arranged along the axial direction of the needle cylinder (1).

7. The residue free self-destructing syringe of claim 1 and further characterized by: one side of the inner side opening of the clamping groove (5) close to the push rod (7) is provided with a clamping block (9), and the clamping bulge (6) is correspondingly provided with a clamping inclined surface (10).