Needle retraction type safety injector

A safety syringe and needle technology, applied in the directions of syringes, hypodermic injection devices, infusion sets, etc., can solve the problems of inconvenient mass production, unreasonable concave-convex matching structure, and high precision, and achieve the effects of easy mass production, easy detachment, and easy assembly.

Active Publication Date: 2007-02-14
SHANGHAI SOL MILLENNIUM MEDICAL PRODUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Syringes are an indispensable tool in medical treatment. In order to avoid cross-infection of blood, the current syringes are all disposable syringes. However, after the syringe is injected, if the needle is still outside the syringe, it will be injured during its destruction. Staff, thus causing secondary cross-infection, in order to solve the above problems, people have developed a variety of syringes in which the needle can be retracted into the syringe after the injection is completed, and many of them have obtained patents. See various safety syringe patents, Mostly, a concave-convex fit is set between the front end of the syringe push rod and the needle seat. When the push rod is pushed to the front end of the syringe after inj

Method used

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  • Needle retraction type safety injector
  • Needle retraction type safety injector
  • Needle retraction type safety injector

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1: see figure 1 , Picture 9 Shown: the present invention includes a hollow syringe 1, push rod 2, rubber plug 3, needle holder 4, elastic connecting needle holder 5, support seat 6, sealing rubber plug 7, clamping core 8, needle holder 4 and elastic connecting needle The seat 5 is connected, and the elastic connection needle seat 5 is limited by the support seat 6 at the upper end of the needle cylinder 1,

[0036] See Picture 10 , The inner side of the upper end of the needle cylinder 1 is provided with a ring of groove 111, a ring of boss 112 is provided under the groove 111, the inner side of the lower end of the needle cylinder 1 is provided with an oblique convex step 113, and the inner side of the end of the needle cylinder 1 is provided with an oblique groove 114. The groove 114 and the inner wall of the barrel 1 are formed with a slope 115.

[0037] See Picture 11 , Picture 12 , The elastic coupling needle seat 5 is provided with an inner cavity 511 thr...

Example Embodiment

[0044] Example 2:

[0045] See Figure 20, Figure 21 22. In this embodiment, another structure of the elastic coupling needle holder 5 is given. The structure of the elastic coupling needle holder 5 is basically the same as that of the elastic coupling needle holder 5 shown in Embodiment 1, except that : A circle 5112 is provided on the upper end surface of the connection between the elastic supporting claw 512 and the supporting leg 513, and a sealing ring 5113 is provided between the outer side of the circle 5112 and the inner wall of the syringe 1 accordingly.

[0046] The other structures in this embodiment are the same as the first embodiment.

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PUM

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Abstract

A high-safety injector with withdrawn needle is disclosed. The elastic supporting jaws with external convex step and supporting legs with flange at lower end are formed at lower end of elastic needle holder. The injection tube with internal slot matched with said convex step of supporting jaw. A supporting seat has the external convex step is contact with said supporting jaws, the internal upper flange matched with the flange of said supporting leg, and the lower supporting arm with elastic ratchets and close to said supporting leg. The fastening core has a conic table matched with said elastic ratchets.

Description

technical field [0001] The invention relates to a medical syringe, in particular to a medical syringe in which the needle can be retracted without being pulled out by a doctor, and the needle is hidden after use so that it will not be exposed and hurt people. Background technique [0002] Syringes are an indispensable tool in medical treatment. In order to avoid cross-infection of blood, the current syringes are all disposable syringes. However, after the syringe is injected, if the needle is still outside the syringe, it will be injured during its destruction. Staff, thus causing secondary cross-infection, in order to solve the above problems, people have developed a variety of syringes in which the needle can be retracted into the syringe after the injection is completed, and many of them have obtained patents. See various safety syringe patents, Mostly, a concave-convex fit is set between the front end of the syringe push rod and the needle seat. When the push rod is push...

Claims

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Application Information

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IPC IPC(8): A61M5/31A61M5/50A61M5/178
CPCA61M5/322A61M2005/31516A61M2005/31508
Inventor 林作钱
Owner SHANGHAI SOL MILLENNIUM MEDICAL PRODUCTS CO LTD
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