CN215134920U

CN215134920U - Low-residue vaccine syringe capable of shielding needle tip

Info

Publication number: CN215134920U
Application number: CN202120755195.6U
Authority: CN
Inventors: 缪李平; 桑卫东; 顾云飞; 戴晓玲
Original assignee: Wuxi Yushou Medical Appliances Co ltd
Current assignee: Wuxi Yushou Medical Appliances Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-12-14
Anticipated expiration: 2031-04-13

Abstract

The utility model discloses a low-residue vaccine injector for shielding needle points, which comprises a needle tube, a needle head and a core bar, wherein the needle tube is in a straight tube shape with a smooth inner cavity, a step hole is arranged on the inner wall of the head end, the needle head extends out from the head end of the needle tube, a needle seat of the needle head is embedded in the step hole, the tail end face of the needle seat is flush with the inner wall surface of the head end of the needle tube, a buckle groove is arranged on the tail end face, a convex snap ring is arranged on the notch of the buckle groove, the head end of the core bar is provided with a rubber plug and passes through the rubber plug to extend out a chuck, when the core bar is pushed in from the tail end of the needle tube until the rubber plug completely clings to the inner wall surface of the head end of the needle tube, the chuck is inserted into the buckle groove and limited by the convex snap ring, so that the core bar is locked with the needle head; when the core rod is withdrawn, the needle head is driven to retract into the needle tube. The injector simplifies the internal structure of the needle tube, reduces the clearance as much as possible, effectively reduces the injection residue, can complete the actions of injection and needle point shielding by driving the core rod, has simple operation, has self-destruction function and is safe to use.

Description

Low-residue vaccine syringe capable of shielding needle tip

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a low residual vaccine syringe of shielding needle point.

Background

In order to ensure the activity of the vaccine and facilitate the transportation and use, the current injection vaccine is directly quantitatively stored in an injector and is stored together with the injector. Due to the regulated dosage, the residual amount of vaccine in the syringe after injection needs to be reduced as much as possible, which has high requirements on the internal structure of the syringe. In addition, in order to reduce the cross infection of infectious diseases, a one-person needle-tube system is advocated, meanwhile, the accidental injury of the needle tip to patients and medical staff is avoided, and the functions of self-destruction and needle tip shielding after the disposable syringe is used are also needed to be realized, so that the disposable syringe still has the value of further research and development.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low residual vaccine syringe of shielding needle point to above-mentioned problem, optimizes syringe inner structure, reduces the injection volume of remaining, convenient operation, simple shielding needle point.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a low-residue vaccine injector for shielding a needle point comprises a needle tube, a needle head and a core bar, wherein the needle tube is in a straight tube shape with a smooth inner cavity, a step hole is formed in the inner wall of the head end of the needle tube, the needle head extends out of the head end of the needle tube, a needle seat of the needle head is embedded in the step hole, the tail end face of the needle seat is flush with the inner wall surface of the head end of the needle tube, a clamping groove is formed in the tail end face of the clamping groove, a convex clamping ring is arranged on the notch of the clamping groove, a rubber plug is arranged at the head end of the core bar and penetrates through the rubber plug to extend out of a clamping head, and when the core bar is pushed into the tail end of the needle tube until the rubber plug completely clings to the inner wall surface of the head end of the needle tube, the clamping head is inserted into the clamping groove and limited by the convex clamping ring, so that the core bar and the needle head are locked; when the core rod is withdrawn, the needle head is driven to retract into the needle tube.

Particularly, the core bar is provided with a baffle ring for axially limiting the rubber plug, a folding opening is formed in the core bar behind the baffle ring, the tail end of the needle tube is provided with a spigot, and when the core bar is withdrawn to the position where the baffle ring is limited by the spigot, the core bar is broken through the folding opening, so that self-destruction is realized.

Particularly, the clamping head is conical, and the clamping groove is correspondingly formed into a conical cavity.

In particular, a sealing ring is protruded on the outer ring surface of the needle seat so as to be in interference fit with the stepped hole.

In particular, the outer wall of the head end of the needle tube is provided with a concave-convex part for installing the sheath.

Particularly, the end face of the tail end of the core rod is provided with a friction bump.

To sum up, the beneficial effects of the utility model are that, compared with the prior art, the low residual vaccine syringe of shielding needle point has simplified the needle tubing inner structure, has saved unnecessary built-up member, reduces the clearance as far as possible, has effectively reduced the injection and has remained, and the action that the injection and shielding needle point can be accomplished to the drive core bar, easy operation more has self-destruction function, safe in utilization.

Drawings

Fig. 1 is a schematic structural diagram of a needle-tip shielded low-residue vaccine syringe according to an embodiment of the present invention;

fig. 2 is an enlarged view of the structure of the needle tip end of the needle tip shielding low residue vaccine syringe according to the embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present embodiment provides a low residue vaccine syringe with needle shielding, which comprises a needle tube 1, a needle 2 and a core rod 3. Needle tubing 1 is the level and smooth straight tube-shape of inner chamber and is provided with step hole 4 on the head end inner wall, needle 2 stretches out and the needle file dress of needle 2 inlays in step hole 4 from the head end of needle tubing 1, the tail end face of needle file flushes and is provided with buckle groove 5 on the tail end face with the head end internal face of needle tubing 1, the notch in buckle groove 5 is provided with protruding snap ring 6, the head end of core bar 3 is provided with plug 7 and passes plug 7 and extend dop 8, dop 8 is the preferred toper that is of here, buckle groove 5 corresponds and forms to the tapering die cavity.

The needle tube 1 has smooth inner cavity without redundant concave-convex structure, can be well matched with the rubber plug 7, reduces the clearance and effectively reduces the residual quantity of the injection.

When the core bar 3 is pushed in from the tail end of the needle tube 1 until the rubber plug 7 completely clings to the inner wall surface of the head end of the needle tube 1, the chuck 8 is inserted into the clamping groove 5 and limited by the raised clamping ring 6, so that the core bar 3 and the needle head 2 are locked; when the core bar 3 is withdrawn, the needle head 2 is driven to retract into the needle tube 1.

The core bar 3 is provided with a baffle ring 9 for axially limiting the rubber plug 7, a folding opening 10 is arranged on the core bar 3 behind the baffle ring 9, the tail end of the needle tube 1 is provided with a spigot 11, and when the core bar 3 is withdrawn to the position where the baffle ring 9 is limited by the spigot 11, the core bar 3 is broken through the folding opening 10 to realize self-destruction.

The sealing ring 12 is protruded on the outer ring surface of the needle base, so that the sealing ring is in interference fit with the step hole 4, the sealing performance of the injector is ensured, and the requirement of clinical puncture resistance is met.

The outer wall of the head end of the needle tube 1 is provided with a concave-convex part 13 for installing a sheath.

The end face of the tail end of the core rod 3 is provided with a friction salient point 14.

In conclusion, the low-residue vaccine syringe capable of shielding the needle tip simplifies the internal structure of the needle tube, saves redundant assembly parts, reduces gaps as much as possible, effectively reduces the residue of injection, can complete the actions of injection and needle tip shielding by driving the core rod, is simple to operate, has a self-destruction function and is safe to use.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A low-residue vaccine injector for shielding a needle point is characterized by comprising a needle tube, a needle head and a core bar, wherein the needle tube is in a straight tube shape with a smooth inner cavity, a step hole is formed in the inner wall of the head end of the needle tube, the needle head extends out of the head end of the needle tube, a needle seat of the needle head is embedded in the step hole, the tail end face of the needle seat is flush with the inner wall surface of the head end of the needle tube, a clamping groove is formed in the tail end face of the needle seat, a convex clamping ring is arranged at the notch of the clamping groove, a rubber plug is arranged at the head end of the core bar and penetrates through the rubber plug to extend out of a clamping head, and when the core bar is pushed in from the tail end of the needle tube until the rubber plug completely clings to the inner wall surface of the head end of the needle tube, the clamping head is inserted into the clamping groove and limited by the convex clamping ring, so that the core bar is locked with the needle head; when the core rod is withdrawn, the needle head is driven to retract into the needle tube.

2. The needle-tip shielded low-residue vaccine syringe of claim 1, wherein: the needle tube is characterized in that a blocking ring for axially limiting the rubber plug is arranged on the core bar, a folding opening is formed in the core bar behind the blocking ring, a spigot is formed in the tail end of the needle tube, and when the core bar is withdrawn to the position where the blocking ring is limited by the spigot, the core bar is broken through the folding opening, so that self-destruction is realized.

3. The needle-tip shielded low-residue vaccine syringe of claim 1, wherein: the clamping head is conical, and the clamping groove is correspondingly formed into a conical cavity.

4. The needle-tip shielded low-residue vaccine syringe of claim 1, wherein: and a sealing ring is raised on the outer ring surface of the needle base so as to be in interference fit with the stepped hole.

5. The needle-tip shielded low-residue vaccine syringe of claim 1, wherein: the outer wall of the head end of the needle tube is provided with a concave-convex part for installing a sheath.

6. The needle-tip shielded low-residue vaccine syringe of claim 1, wherein: and friction convex points are arranged on the end surface of the tail end of the core rod.