CN218652658U

CN218652658U - High leakproofness syringe

Info

Publication number: CN218652658U
Application number: CN202221962130.XU
Authority: CN
Inventors: 孙永贤
Original assignee: Wepon Medical Technology Co ltd
Current assignee: Wepon Medical Technology Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-03-21
Anticipated expiration: 2032-07-25

Abstract

The utility model provides a high leakproofness syringe belongs to medical appliances technical field. It is poor that it has solved current syringe leakproofness, influences the problem that the intracavity medicine used. The high-sealing-performance injector comprises a needle cylinder, wherein a needle head is arranged at the top of the needle cylinder, a needle cap which is connected with the needle cylinder in a sealing and clamping manner is arranged outside the needle head, a sealing ring is arranged on the inner wall of the needle cap and is connected with the needle cylinder, the longitudinal section of the sealing ring is in a flat elliptic shape, a first sealing groove which is used for sealing and embedding the outer ring of the sealing ring is formed in the inner wall of the needle cap, an outer annular part which is used for connecting and clamping the needle cap in a sealing manner is formed in the outer wall of the needle cylinder in a radially outward convex manner, a second sealing groove which is used for sealing and bonding the inner ring of the sealing ring is formed in the outer wall of the outer annular part, a piston rod is arranged in the needle cylinder, the front end of the piston rod is provided with a piston head, the end of the piston head is of a conical head structure, and a plurality of anti-slip ribs are distributed on the needle cylinder along the circumferential direction of the outer wall. The utility model has the advantages of good sealing performance, preventing the medicine in the needle cylinder from being polluted and simultaneously reducing the waste of medicine resources.

Description

High leakproofness syringe

Technical Field

The utility model belongs to the technical field of medical appliances, a syringe is related to, in particular to high leakproofness syringe.

Background

A syringe is a common medical device that primarily uses a needle to draw or inject a gas or liquid. The existing syringe and a needle cap arranged outside the needle head of the syringe have poor sealing structures and are connected through threads; as can be seen from the patent document entitled "syringe plug sealing structure for prefilled syringe" in patent No. 202020723311.1, the needle cap is threaded, which results in a cumbersome use. And the poor seal structure can easily cause pollution to the medicine in the syringe cavity in the use and storage process, and influence the use of the medicine.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a high leakproofness syringe that prevents that syringe intracavity medicine from polluting.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a high leakproofness syringe, includes the cylinder, and the top of cylinder has the syringe needle, its characterized in that, the syringe needle be equipped with outward with the syringe needle cap of the sealed joint of cylinder, needle cap inner wall on and be equipped with the sealing washer with the junction of cylinder, the longitudinal section of this sealing washer is flat ellipse shape, needle cap inner wall department set up supply the sealed seal groove one that inlays mutually of sealing washer outer lane, the cylinder outer wall on radial evagination become to have the outer loop that supplies the sealed joint of syringe needle cap, outer loop outer wall department set up supply the sealed seal groove two of sealing washer inner circle sealed bonding, the surface of sealing washer inner circle bonds on the cell wall of seal groove, the cylinder in be equipped with reciprocating motion's piston rod, the piston rod front end piston head has, the tip of piston head adopts the conical head structure, piston head tip middle department have the axial evagination guide holder that the axial evagination was connected, guide holder middle part set up the conical head structure, the inner wall of this cylinder tip have the conical head groove that matches along the circumference guide rib that supplies the syringe needle head to connect.

In the high-sealing-performance injector, the longitudinal sections of the first sealing groove and the second sealing groove are both in an inverted trapezoid shape.

In the high-sealing injector, an annular fillet groove communicated with the liquid guide hole is formed between the guide seat and the needle cylinder, and a liquid pressing ring guided into the annular fillet groove is formed between the guide head and the piston.

In the above syringe with high sealing performance, the outer end of the anti-slip rib is provided with a curved surface.

Compared with the prior art, the high-tightness injector has the advantages that the needle cap is convenient to detach and connect, the tightness between the needle cap and the needle cylinder is good, and medicines in the needle cylinder are prevented from being polluted; simultaneously, the method also has the advantage of reducing the waste of medicine resources.

Drawings

Fig. 1 is a schematic perspective view of the high-sealability syringe.

Fig. 2 is a schematic sectional structure view of the high-sealability syringe.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

In the figure, 1, a syringe; 2. a needle head; 3. a needle cap; 4. a seal ring; 5. a first sealing groove; 6. an outer ring portion; 7. a second sealing groove; 8. a piston rod; 9. a piston head; 10. a guide head; 11. a cone groove; 12. a guide seat; 13. a drain hole; 14. anti-skid ribs; 15. an annular fillet groove; 16. a liquid pressing ring; 17. a curved surface.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the high-sealing injector comprises a syringe 1, a needle 2 is arranged at the top of the syringe 1, a needle cap 3 which is in sealing joint with the syringe 1 is arranged outside the needle 2, a sealing ring 4 is arranged on the inner wall of the needle cap 3 and at the joint with the syringe 1, the longitudinal section of the sealing ring 4 is in a flat elliptic shape, a first sealing groove 5 for sealing and embedding the outer ring of the sealing ring 4 is formed in the inner wall of the needle cap 3, an outer ring 6 for sealing and clamping the needle cap 3 is formed in the outer wall of the syringe 1 in a radially outward convex shape, a second sealing groove 7 for sealing and bonding the inner ring of the sealing ring 4 is formed in the outer wall of the outer ring 6, the outer surface of the inner ring of the sealing ring 4 is bonded to the groove wall of the sealing groove, a piston rod 8 which reciprocates is arranged in the syringe 1, a piston head 9 is arranged at the front end of the piston rod 8, a cone structure is adopted at the end of the piston head 9, a guide head 10 which protrudes axially in the middle of the end of the piston head 9, a cone structure is also adopted at the end of the syringe 1, a plurality of the inner wall of the syringe 1, a cone groove 11 which is matched with a cone groove 11 which the piston head 12 for connecting the needle cap 12 which the needle cap is arranged in the needle head and a high-sealing joint with a needle seat 12 for connecting the needle head 12 which is arranged in the needle head 3, and a high-sealing joint with a high-sealing joint of the needle seat which is arranged in the needle head 3, and a high-sealing joint with a high-sealing joint structure which is arranged in the needle seat in the middle of the syringe 1, and a high-sealing joint with a high-sealing joint structure which is arranged in the needle seat.

Preferably, the longitudinal sections of the first sealing groove 5 and the second sealing groove 7 are both in an inverted trapezoid shape.

The flat elliptic sealing ring 4 expands radially under the effect of the inverted trapezoid-shaped sealing groove, and the outer surface of the sealing ring 4 is tightly attached to the wall surface of the sealing groove, so that better sealing and clamping effects are achieved.

In detail, an annular fillet groove 15 communicated with the liquid guide hole 13 is formed in the guide seat 12 and between the guide seat and the needle cylinder 1, a hydraulic ring 16 guided into the annular fillet groove 15 is formed between the guide head 10 and the piston, when the piston rod 8 works, the piston rod 8 is extruded and presses liquid outwards, at the moment, in order to achieve the saturation of liquid pressing, through the cooperation between the hydraulic ring 16 and the annular fillet groove 15, after the guide head 10 is guided into the liquid guide hole 13, a gap between the guide hole and the needle cylinder 1 is reduced to the greatest extent, the high efficiency of liquid pressing is improved, and the waste of medicine resources is reduced.

In a detailed description, the outer end of the anti-slip rib 14 is provided with a curved surface 17, when the user uses the syringe 1, the anti-slip rib 14 brings an anti-friction effect to the user, and the outer end surface is the curved surface 17, so that the grip force is enhanced.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the syringe 1, the needle 2, the needle cap 3, the sealing ring 4, the first sealing groove 5, the outer annular part 6, the second sealing groove 7, the piston rod 8, the piston head 9, the guide head 10, the conical groove 11, the guide seat 12, the liquid guide hole 13, the anti-slip rib 14, the annular fillet groove 15, the liquid pressing ring 16, the curved surface 17 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a high leakproofness syringe, includes cylinder (1), and the top of cylinder (1) has syringe needle (2), its characterized in that, syringe needle (2) be equipped with outward with cylinder (1) sealed joint's hood (3), hood (3) inner wall on and be equipped with sealing washer (4) with the junction of cylinder (1), the longitudinal section of this sealing washer (4) is flat ellipse shape, hood (3) inner wall department set up supply sealing washer (4) outer lane sealed seal groove (5) of inlaying mutually, cylinder (1) outer wall on radial evagination become to have outer loop (6) that supply hood (3) sealed joint, outer loop (6) outer wall department set up supply sealing washer (4) inner circle sealed adhesive seal groove two (7), the surface of sealing washer (4) inner circle is on the cell wall of seal groove, cylinder (1) in be equipped with reciprocating motion's piston rod (8), piston rod (8) front end have piston head (9), the tip of piston head (9) adopts the cone structure, the cone head (9) of the tip of piston head (9) of the middle of guide has the cone head (10), this cylinder (1) end portion of cone head (11) and this head (11) end portion of cylinder (11) match, the needle cylinder is characterized in that a guide seat (12) protruding outwards in the axial direction and connected with the needle head (2) is arranged in the middle of the end portion of the needle cylinder (1), a liquid guide hole (13) for the guide head (10) to be connected into is formed in the middle of the guide seat (12), and a plurality of anti-skidding ribs (14) are distributed on the needle cylinder (1) along the circumferential direction of the outer wall of the needle cylinder.

2. The high-sealability syringe of claim 1, wherein the longitudinal sections of the first sealing groove (5) and the second sealing groove (7) are both inverted trapezoid-shaped.

3. The high-tightness injector according to claim 1, characterized in that an annular fillet groove (15) communicated with the liquid guide hole (13) is formed in the guide seat (12) and between the guide seat and the syringe (1), and a liquid pressing ring (16) guided into the annular fillet groove (15) is formed between the guide head (10) and the piston.

4. The syringe with high sealing performance according to claim 1, wherein the outer end of the anti-slip rib (14) is provided with a curved surface (17).