CN201227459Y

CN201227459Y - Disposable syringe

Info

Publication number: CN201227459Y
Application number: CNU2008200255481U
Authority: CN
Inventors: 邱英娜; 隋国龙; 梁蒙; 杨晓
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-09
Filing date: 2008-07-09
Publication date: 2009-04-29
Anticipated expiration: 2018-07-09

Abstract

The utility model relates to a disposable syringe, belonging to the field of medical instruments. The needle cylinder is provided with a cylindrical needle seat at the front end, a fixing block for fixing the needle is clamped in the needle seat, a splayed annular table is processed on the inner cavity wall at the tail end of the needle, a piston is processed at the front end of a push rod and is in sliding fit with the inner cavity wall of the needle cylinder, an exhaust hole is processed on a rear cover at the tail end of the needle cylinder, an ejector rod is arranged in the middle of the end part of the piston, and a splayed rubber snap ring is clamped on the ejector rod. The utility model discloses accomplish the back at the injection, rubber snap ring card is on annular platform, and at this moment, the pulling push rod drives the syringe needle rearward movement, will receive the needle point withdrawal cylinder of pollution to can avoid making used needle point stabbing medical personnel.

Description

Disposable syringe

Technical field

This utility model relates to medical instruments field, says it is a kind of disposable syringe in detail.

Background technology

As everyone knows: syringe comprises needle point, push rod, urceolus and check device, one easily broken brace rod is arranged on the push rod, needle point embeds the urceolus lower end, one push rod check device is installed between syringe and the push rod, comprise a non-return reed, when push rod was pulled out, non-return reed original position in tube was motionless, when push rod pushes, push rod drives the non-return reed and moves at the bottom of urceolus, and when spurring push rod once more, the non-return reed supports and stings on outer tube wall, push rod is provided with an easily broken brace rod, the non-return reed supports when stinging on outer tube inner wall, and push rod can't spur, under forceful action, the brace rod fracture, syringe damages, and can't use by secondary, and its weak point is, needle point is exposed to outside the syringe, and the contaminated pinhead after the injection is stabbed medical personnel easily.

Summary of the invention

The purpose of this utility model just is to overcome the deficiency of existing technology, and a kind of safety injector is provided, and the syringe needle of syringe can be taken in the syringe, has avoided contaminated needle sting medical personnel, thereby improves the safety of syringe.

This utility model adopts following technical solution: be provided with syringe, the syringe front end is the cylindrical shape needle stand, engaging is useful on the fixed block of fixed needle in the needle stand, be processed with the annular table of splayed configuration on the internal chamber wall of syringe needle end, the front end of push rod is processed with piston, and the internal chamber wall of piston and syringe is slidingly matched, and is processed with steam vent on the bonnet of syringe end, the middle part of pistons end is provided with push rod, and card has the rubber snap ring of splayed configuration on the push rod.

The beneficial effects of the utility model are that after injection was finished, the rubber snap ring was stuck on the annular table, at this moment, spurred push rod, drove syringe needle and moved backward, in contaminated needle point withdrawal syringe, thereby can avoid used needle point to stab medical personnel.

Description of drawings

Below in conjunction with drawings and Examples this utility model is further specified.

Fig. 1 is a structural representation of the present utility model.

1. bonnets among the figure, 2. push rod, 3. push rod, 4. syringe, 5. needle stand, 6. syringe needle, 7. fixed block, 8. annular table, 9. piston, 10. steam vent, 11. rubber snap rings.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, to help understanding content of the present utility model.

As shown in Figure 1, be provided with syringe 4, syringe 4 front ends are cylindrical shape needle stand 5, engaging is useful on the fixed block 7 of fixed needle 6 in the needle stand 5, be processed with the annular table 8 of splayed configuration on the internal chamber wall of syringe needle 6 ends, the front end of push rod 2 is processed with piston 9, piston 9 is slidingly matched with the internal chamber wall of syringe 4, is processed with steam vent 10 on the bonnet 1 of syringe 4 ends, and the middle part of piston 9 ends is provided with push rod 3, card has the rubber snap ring 11 of splayed configuration on the push rod 3, when injection was finished, the rubber snap ring 11 of splayed configuration entered annular table 8 inner chambers of splayed configuration, and finally passes the inner chamber of annular table 8, the recovery of shape of rubber snap ring 11, thus rubber snap ring 11 is locked on the annular table 8.

Claims

1, a kind of disposable syringe, be provided with syringe, it is characterized in that: the syringe front end is the cylindrical shape needle stand, engaging is useful on the fixed block of fixed needle in the needle stand, is processed with the annular table of splayed configuration on the internal chamber wall of syringe needle end, and the front end of push rod is processed with piston, the internal chamber wall of piston and syringe is slidingly matched, be processed with steam vent on the bonnet of syringe end, the middle part of pistons end is provided with push rod, and card has the rubber snap ring of splayed configuration on the push rod.