CN204655699U

CN204655699U - Automatic contractile safety syringe

Info

Publication number: CN204655699U
Application number: CN201520314556.8U
Authority: CN
Inventors: 罗松能
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-16
Filing date: 2015-05-16
Publication date: 2015-09-23
Anticipated expiration: 2025-05-16

Abstract

This utility model relates to a kind of automatic contractile safety syringe, particularly relate to after needle tubing can be made to recoil to self-destruction syringe in core bar, mainly comprise: sheath, the injection tube that can enter for core bar, top is provided with the core bar of plug and the part of pulling back with needle tubing, part of pulling back is stuck in injection tube by the fixture block inside needle stand and injection tube, pulling back outside part is arranged with by the O type circle for liquid-leakage preventing, core bar inside is provided with extracting member, the back segment pocketed springs of extracting member, extracting member leading portion is provided with the card convex head be clasped with part internal cavities of pulling back, the card convex ring A of extracting member and card groove A be clasped, extracting member front end is positioned at outside core bar, fixture block can outwards extrude by extracting member front end, card convex head is urged in cavity, and take back draw piece and back move, its fixture block can prevent the phenomenon occurring the withdraw of the needle when first time puncture effectively, and by extracting member front end, fixture block is extruded, smoothly the needle tubing after use can be retracted, ensure carrying out smoothly of injection work.

Description

Automatic contractile safety syringe

Technical field

This utility model relates to a kind of automatic contractile safety syringe, and needle tubing can be made after particularly relating to a kind of use to recoil to self-destruction syringe in core bar.

Background technology

Growing along with medical industry, also more and more higher to the hygienic requirements of medical apparatus and instruments, syringe account for a very large part in medical apparatus and instruments, for there is cross infection when avoiding to the mankind or animal input or take out medium, disposable syringe widely uses in modern medicine industry as the medical apparatus and instruments of routine, namely as hospital refuse process after use.

Chinese patent was once disclosed multinomial needle tubing retraction destructing safety formula syringe, but the feature of its structure arranges rebound spring between needle stand and inside, injection tube upper end, after using described injector to inject, under the action of the spring, needle tubing is entered in the cavity of core bar together with needle stand by resilience, occur because needle tubing exposes the phenomenon of stabbing the relevant personnel after preventing syringe from using, reach the object of safety self-destruct.

Summary of the invention

The purpose of this utility model is for the existing state of the art, provides a kind of structure and the simple automatic contractile safety syringe of assembly technology.

For achieving the above object, this utility model adopts following technical scheme:

Automatic contractile safety syringe, mainly comprise: sheath, the injection tube that can enter for core bar, top are provided with the core bar of plug and the part of pulling back with needle tubing, described part of pulling back is stuck on injection tube by the fixture block inside needle stand and injection tube, to pull back the O type circle be arranged with outside part for liquid-leakage preventing, described core bar inside is provided with extracting member, the back segment pocketed springs of extracting member, extracting member front end is positioned at outside core bar, fixture block can outwards extrude by extracting member front end, card convex head is urged in cavity, and takes back draw piece and back move.

Further, extracting member leading portion is provided with the card convex head be clasped with part internal cavities of pulling back, the card convex ring A of extracting member and card groove A be clasped.

Further, be provided with card convex ring B outside described needle stand, be provided with card groove B inside injection tube, card convex ring B and card groove B is clasped, and described needle tubing is fixed on part leading portion of pulling back, and cavity is arranged on intrasegmental part after part of pulling back, and part leading portion of pulling back can pass needle stand.

Further, rear end and the injection tube top of described needle stand are threaded connection, and be threaded the external screw thread that comprises and be arranged on needle stand rear end and be provided with the female thread engaged with external screw thread at injection tube leading inside.

Further, the card convex head of described extracting member front end is connected with part internal cavities angle-inserting type of pulling back, and angle-inserting type connects the taper seat comprising and be arranged at card convex head front end and cavity rear end and cooperatively interact.

Further, the rear plug ejected for the part that prevents from pulling back is provided with bottom described core bar.

The beneficial effects of the utility model are:

1, this utility model is pulled back outside part and is arranged with O type circle, when extracting injection, its rubber o-ring prevents liquid from infiltrating from needle stand effectively, effectively can not only play the effect of sealing, avoid wasting injection, and ensure carrying out smoothly of injection work;

2, extracting member front end can by the fixture block inside injection tube respectively to outer extruding, card convex head to be urged in cavity and to take back draw piece and back moves, compared to conventional art, its fixture block can prevent the phenomenon occurring the withdraw of the needle when first time uses effectively, and by extracting member front end, fixture block is extruded, can smoothly the needle tubing after use be retracted.

accompanying drawing illustrates:

Accompanying drawing 1 is structural representation of the present utility model;

Accompanying drawing 2 is structural representation of the present utility model;

Accompanying drawing 3 is needle tubing of the present utility model retraction fundamental diagram;

Accompanying drawing 4 be after use of the present utility model steel needle retractable to the view of core bar inside;

Accompanying drawing 5 is core bar front view of the present utility model;

Accompanying drawing 6 is part sectional view of pulling back of the present utility model;

Accompanying drawing 7 is injection tube left view of the present utility model.

detailed description of the invention:

Can have the object of this utility model, feature and function to make juror and further understand, hereby lift preferred embodiment and coordinate graphic being described in detail as follows:

Embodiment 1 refers to shown in Fig. 1, it is the schematic diagram of the preferred embodiment of this utility model, automatic contractile safety syringe, mainly comprise: sheath 2, the injection tube 6 that can enter for core bar 9, top is provided with the core bar 9 of plug 4 and the part 1 of pulling back with needle tubing, , described part 1 one end of pulling back is stuck on injection tube 6 by needle stand 5, part 1 other end of pulling back is stuck on injection tube 6 by the fixture block 61 inside injection tube 6, pulling back outside part 1 encloses by the O type circle 3 for liquid-leakage preventing, its O type circle 3 plays the effect of sealing effectively, injection is avoided to ooze out, described core bar 9 is hollow tubular structure, its inside is provided with extracting member 7, the back segment pocketed springs 8 of extracting member 7, extracting member 7 leading portion is provided with the card convex that is clasped with part 1 internal cavities 11 of pulling back 71, the card convex ring A72 of the extracting member 7 and card groove A91 of core bar 9 is clasped.Extracting member 7 front end is positioned at outside core bar 9, extracting member 7 front end can by two fixture blocks 61 respectively to outer extruding, card convex 71 is urged in cavity 11, and take back draw piece 1 and back move, prevent the phenomenon occurring the withdraw of the needle when first time uses, ensure the smooth of injection work, and by extracting member front end, fixture block 61 is extruded, can smoothly the needle tubing after use be retracted.

In such scheme, card convex ring B51 is provided with outside needle stand 5, card groove B62 is provided with inside injection tube 6, card convex ring B51 and card groove B62 is clasped, described needle tubing is fixed on part 1 leading portion of pulling back, the pull back front end of part 1 arranges filler chamber 12, its filler chamber 12 as after applying glue for fixing and sealing needle tubing, cavity 11 is arranged on the rear intrasegmental part of part 1 of pulling back, part 1 leading portion of pulling back can pass needle stand 5, the card convex of described extracting member 7 front end 71 is connected with part 1 internal cavities 11 angle-inserting type of pulling back, angle-inserting type connects the taper seat comprising and be arranged at card convex 71 front end and cavity 11 rear end and cooperatively interact.The rear plug 10 ejected for the part 1 that prevents from pulling back is provided with bottom described core bar 9.

Its using method and operation principle as follows:

Refer to Fig. 2 ~ 7 when being shown in Clinical practice, first take off sheath 2, then conveniently the using method of syringe extracts injection, O type circle 3 plays avoids injection transudation, also conveniently the using method of syringe carries out drug injection, and when inserting at needle tubing, part 1 of pulling back can produce counteracting force definitely, now fixture block 61 can block part 1 of pulling back, and prevents withdraw of the needle phenomenon; When injectable drug terminates rear, core bar 9 front end is pushed to injection tube 6 inside top, the extracting member 7 front end card convex of extracting member 7 front end 71 injects cavity 11 by taper seat, and it is inner to be stuck in cavity 1, now, extracting member 7 front end can, by two fixture blocks 61 respectively to outer extruding, make its part 1 of pulling back can return in injection tube 6; If again apply an active force to needle tubing, its active force and when being sleeved on the snug friction power of making a concerted effort to be greater than card convex ring A72 and groove A91 of tension force of spring 8 in extracting member 7, it makes a concerted effort extracting member 7 to spring into core bar 9 inside together with pullback 1 and needle tubing.Thus, syringe cannot be reused, and it is inner that its pullback 1 and needle tubing are all stored in core bar 9, reaches self-destruction, safe effect.

Embodiment 2, rear end and injection tube 6 top of described needle stand 5 are threaded connection, and be threaded the external screw thread that comprises and be arranged on needle stand 5 rear end and be provided with the female thread engaged with external screw thread at injection tube 6 leading inside.

More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model, the technical staff of the industry should understand, this utility model is not restricted to the described embodiments, what describe in above-described embodiment and description just illustrates principle of the present utility model, under the prerequisite not departing from this utility model spirit and scope, this utility model also has various changes and modifications, these changes and improvements all fall within the scope of claimed this utility model, the claimed scope of this utility model is defined by appending claims and equivalent thereof.

Claims

1. automatic contractile safety syringe, mainly comprise: sheath (2), the injection tube (6) that core bar (9) enters can be supplied, top is provided with the core bar (9) of plug (4) and the part of pulling back (1) with needle tubing, it is characterized in that: described part of pulling back (1) is stuck on injection tube (6) by the fixture block (61) of needle stand (5) and injection tube (6) inner side, to pull back the O type circle (3) be arranged with outside part (1) for liquid-leakage preventing, described core bar (9) inside is provided with extracting member (7), the back segment pocketed springs (8) of extracting member (7), described extracting member (7) front end is positioned at outside core bar (9), extracting member (7) front end can by two fixture blocks (61) respectively to outer extruding, card convex head (71) is urged in cavity (11), and take back draw piece (1) and back move.

2. automatic contractile safety syringe according to claim 1, it is characterized in that: extracting member (7) leading portion is provided with the card convex head (71) be clasped with part of pulling back (1) internal cavities (11), the card convex ring A(72 of extracting member (7)) with the card groove A(91 of core bar (9)) be clasped.

3. automatic contractile safety syringe according to claim 2, it is characterized in that: described needle stand (5) outside is provided with card convex ring B(51), injection tube (6) inner side is provided with card groove B(62), card convex ring B(51) and card groove B(62) be clasped, described needle tubing is fixed on part of pulling back (1) leading portion, cavity (11) is arranged on part of pulling back (1) intrasegmental part afterwards, and part of pulling back (1) leading portion can pass needle stand (5).

4. automatic contractile safety syringe according to claim 2, it is characterized in that: rear end and injection tube (6) top of described needle stand (5) are threaded connection, be threaded the external screw thread that comprises and be arranged on needle stand (5) rear end and be provided with the female thread engaged with external screw thread at injection tube (6) leading inside.

5. the automatic contractile safety syringe according to claim 3 or 4, it is characterized in that: the card convex head (71) of described extracting member (7) front end is connected with part of pulling back (1) internal cavities (11) angle-inserting type, angle-inserting type connects the taper seat comprising and be arranged at card convex head (71) front end and cavity (11) rear end and cooperatively interact.

6. automatic contractile safety syringe according to claim 5, is characterized in that: described core bar (9) bottom is provided with the rear plug (10) ejected for the part (1) that prevents from pulling back.