CN201091722Y

CN201091722Y - Syringe

Info

Publication number: CN201091722Y
Application number: CNU2007200299822U
Authority: CN
Inventors: 郑丽娟; 解梅; 徐连英; 田志玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2008-07-30
Anticipated expiration: 2017-10-31

Abstract

The utility model discloses an injector, comprising a syringe, the front end of which is provided with a needle. A piston positioned at the front end of a push rod is sheathed in the syringe; a bushing is arranged at the outer side of the syringe; rear ends of the bushing and the syringe are connected via threads; the bushing is provided with a flat retainer; the front end of the bushing is provided with a protective sleeve that can protect the needle; the internal cavity wall at the rear end of the syringe is provided with a non-return groove; the rear end of the push rod is provided with a non-return spring plate corresponding to the non-return groove. The injector can solve problems of hidden dangers caused by disposable injector reuse and unsafe injector use in prior art, and in addition, the structure is simple and practical.

Description

A kind of syringe

Technical field

This utility model relates to a kind of medical instruments, specifically is a kind of disposable injector for medical purpose.

Background technology

As everyone knows, syringe is a kind of medical apparatus commonly used, generally comprises syringe needle, syringe and piston etc., and syringe needle is positioned on the syringe, and piston is in the push rod front end and slidably is sleeved in the syringe; For preventing cross infection and sanitary condition, the disposable use of syringe more and more is subject to people's attention; But the disposable operating position of present most syringe is in " managerial " notion, and disposable syringe itself commonly used does not now have self-destruction, but has reuse, has stayed hidden danger to cross infection like this, also the infection of disease together easily; In addition, present shot device is after use, and outside syringe needle was exposed to, in the process of handling, the scratch staff caused new cross infection easily; The patent No. is 200320131733.6 Chinese utility model patent; name is called disposable syringe safe in utilization; syringe needle is located on the needle holder of syringe front end; syringe needle is by the needle tubing seat; the needle tubing cover; needle tubing; sealing lock ring and spring are formed; needle tubing is contained in needle tubing and overlaps in the anterior through hole; the sealing lock ring is contained on the step of needle tubing cover rear end; and be installed on the terminal part of needle tubing seat cavity; the needle tubing cover plays the effect of protection syringe needle; injection uses push rod can draw the time; the needle tubing cover is rebounded in the syringe by the elastic force effect together with needle tubing; reach and prevent reusable purpose; but its structure relative complex has bigger waste at disposable product, is unfavorable for the large batch of society that pushes to.

The utility model content

The technical problems to be solved in the utility model provides a kind of syringe that can have protectiveness self-distruction structure and energy safety operation; it can solve the potential problem that existing in prior technology recycling disposable syringe and dangerous use syringe are caused, and it is simple in structure, practical.

For solving the problems of the technologies described above; this utility model comprises syringe; the front end of syringe is provided with syringe needle; the piston bush that is in the push rod front end is contained in the syringe, and its construction features is: a sleeve is set up in the syringe outside, and sleeve adopts with the rear end of syringe and is threaded; sleeve is provided with clamping part; telescopic front end is provided with protective sleeve, and the internal chamber wall of back end of syringe is provided with back only groove, and the rear end of push rod is provided with and returns only groove corresponding returning ending sheet.

Described retaining part is in sleeve middle front part position, and it is shaped as recess or plat part on the syringe.

After adopting said structure, the end of syringe is provided with syringe needle, the piston bush that is in the push rod front end is contained in the syringe, and a sleeve is set up in the syringe outside, is threaded with the sleeve employing in the outside away from an end syringe of syringe needle, sleeve ends is provided with the protective sleeve that can protect syringe needle, screw thread can be regulated the length that syringe needle exposes, and both can guarantee the insertion depth of syringe needle before injection, can also inject the protection syringe needle, in order to avoid scratch other people, cause cross infection; Sleeve is provided with clamping part, and retaining part is in telescopic middle front part, and it is shaped as the flat on the syringe, the clamping when being convenient to the injection personnel and having an acupuncture treatment and firmly; Be provided with back only groove in inboard away from an end syringe of syringe needle, the afterbody of push rod is provided with back only sheet, after push rod promotion piston has been injected, the non-return sheet is stuck in the stop-return slot of syringe inside just, stop retracting once more of push rod, play the purpose that self-destructed disposable uses, prevented the various hidden danger that the syringe repeated use causes.

Description of drawings

Accompanying drawing is a cutaway view of the present utility model.

The specific embodiment

Syringe as shown in drawings, comprise syringe 1, the end of syringe 1 is provided with syringe needle 2, the piston 3 that is in push rod 4 front ends is sleeved in the syringe 1, and a sleeve 6 is set up in syringe 1 outside, is threaded adopting with sleeve 6 away from the outside of an end syringe 1 of syringe needle 2, sleeve 6 ends are provided with the protective sleeve 8 that can protect syringe needle 2, by threaded adjusting, can transfer length that syringe needle 2 exposes so that injection, and protective sleeve 8 can keep the erectility of syringe needle; Sleeve 6 is provided with clamping part 7, clamping part 7 is positioned at 1/3 place near the sleeve 6 at syringe needle 2 positions, clamping part is recess or the plat part on sleeve 6 bodies, be provided with back only groove 5 in inboard away from an end syringe 1 of syringe needle 2, the afterbody of push rod 4 is provided with back only shell fragment 9, after having injected medicinal liquid, piston has certain elasticity, to push rod shell fragment 9 being stuck in back ends in the groove 5, can prevent retracting once more of throw-out lever, return to end shell fragment 9 and tiltedly play the limit for the otch shell fragment on the push rod or the projection that is built up on the push rod, the corresponding shape of ending groove 5 of returning must be blocked back and ends shell fragment 9.

Claims

1. syringe; comprise syringe (1); the front end of syringe (1) is provided with syringe needle (2); the piston (3) that is in push rod (4) front end is sleeved in the syringe (1); it is characterized in that: a sleeve (6) is set up in syringe (1) outside; sleeve (6) adopts with the rear end of syringe (1) and is threaded; sleeve (6) is provided with clamping part (7); the front end of sleeve (6) is provided with protective sleeve (8); the internal chamber wall of syringe (1) rear end is provided with back only groove (5), and the rear end of push rod (4) is provided with and returns only groove (5) corresponding returning ending shell fragment (9).

2. syringe according to claim 1 is characterized in that: described clamping part (7) is a flat, is positioned at the middle front part of sleeve (6).