CN1138576C

CN1138576C - Safety syringe

Info

Publication number: CN1138576C
Application number: CNB981163882A
Authority: CN
Inventors: 李仁方
Original assignee: DUNHUANG INTERNATIONAL INVESTMENT Co Ltd
Current assignee: DUNHUANG INTERNATIONAL INVESTMENT Co Ltd
Priority date: 1998-07-24
Filing date: 1998-07-24
Publication date: 2004-02-18
Anticipated expiration: 2018-07-24
Also published as: CN1243014A

Abstract

The present invention discloses a safety syringe composed of a syringe head, a liquid pushing plunger piston and an external tube, wherein a coupling part formed at the front end of the head of the liquid pushing plunger piston can be sheathed into the inner space at the rear end of a syringe seat connector, a plurality of bulges are formed on the side surface of the coupling part, and a plurality of stopping parts corresponding to the bulges of the head of the liquid pushing plunger piston are formed on the inner surface of the syringe seat connector at the syringe head. In this way, after the injection is finished, the coupling part of the head of the liquid pushing plunger piston can be sheathed into the inner space at the rear end of the syringe seat connector, and the head of the syringe tube combined with the head of the liquid pushing plunger piston is also shrunk into the external tube so as to prevent the syringe from puncturing fingers.

Description

Safety injector

The present invention is relevant for a kind of syringe, and especially a kind of have a safety, and can will use among the needle tubing retraction urceolus later and avoid stabbing the safety injector of finger.

For a long time, it is a serious problem that the needle tubing that medical personnel are used syringe is later stabbed always, and is infected some diseases such as hepatitis, AIDS etc. what is heard is arranged also the time because of stabbing.Therefore, hospital personnel need be paid special attention to stab with the needle tubing of avoiding being used syringe later by instruction always.But preferable settling mode should be to develop a kind of new syringe, with these problems of basic solution.

The inventor of this case developed the syringe construction of several novelties once, as, No. the 165304th, the novel patent announcement in Taiwan it " a kind of syringe novel structure safe in utilization " is announced No. 252346 " a kind of syringe novel structure safe in utilization " and is announced " a kind of syringe novel structure safe in utilization " No. 320056.

Though three above-mentioned patent cases all possess the function of safety, in the use or part not fully up to expectations arranged.For example, pushing away the fluid column plug is difficult for will including the injection tube head pull-up of needle tubing with among the retraction urceolus, residue in that can't to be injected into the interior dose of patient body (residual dose) in the syringe too high, the injection tube head be difficult to be pushed into location (be urceolus before end opening) and present can draw immediately medicinal liquid for the state of injection (because of pushing away the fluid column plug promotes the injection tube head among urceolus spy, if it is firmly too light, then the injection tube head can't be pushed the location, if firmly too heavy then push away fluid column plug and injection tube head be combined as a whole be the state that can be pulled up and then also the injection tube head can't be pushed the location with the retraction urceolus) or the like.

Therefore, how to develop a kind of goodly, be easier to use, and the syringe of tool safety just becomes an important problem.

The object of the present invention is to provide a kind of being easy to make, be easy to use simple structure, and the safety injector that can avoid user to be stabbed.

Another object of the present invention is to provide a kind of can be easily with the injection tube head pull-up that includes needle tubing with among the retraction urceolus, also can easily the injection tube head be pushed the safety injector of location.

Another purpose of the present invention is to provide a kind of safety injector that can reduce residual dose effectively.

The objective of the invention is to be achieved through the following technical solutions: a kind of safety injector, it includes:

One injection tube head, it is the needle tubing by an injection, one is fixedly arranged on the needle stand of this needle tubing bottom, and a needle stand connector that supplies this needle stand of installation to use is formed;

One pushes away the fluid column plug, and it is to push away the fluid column stopper rod by one, and a rubber grommet and pushes away the fluid column chock plug and forms; And

One urceolus, it is to hold this injection tube head to push away the fluid column plug with this, make this injection tube head can be exposed to a front opening of this urceolus, and make this push away the fluid column plug can be exposed to an open rearward end of this urceolus and to be displaced within this injection tube head, the inboard of this outer cylinder front end also is provided with an oblique cutting part to replace mutually with intimate engagement with one first flange of this needle stand connector, be somebody's turn to do the inboard of outer tube rear end and be provided with one second flange and push away the fluid column plug to stop this

It is characterized in that: end is formed with a coupling part before pushing away the fluid column chock plug, and it is held in the inner space after can being inserted in the needle stand connector, is formed with several juts on the side surface of coupling part; And

Be formed with several and the corresponding stopper section of jut that pushes away the fluid column chock plug on the inner surface of the needle stand connector of injection tube head, the rear end of this needle stand connector is formed with the L-shaped outer circular edge of section,

The front end inside of described urceolus then is formed with and the corresponding annular groove of described outer circular edge, and this outer circular edge can be embedded into this annular groove by described urceolus inside.

Nationality of the present invention, is pushed away the fluid column plug against the front opening inner edge of living urceolus, and makes the coupling part that pushes away the fluid column chock plug be inserted in the needle stand connector rear inside space when action of injection is finished by technique scheme; Push away the fluid column plug by rotation, several juts on the coupling part are engaged with several corresponding stopper sections of needle stand connector; To push away the fluid column plug again and pull back, and can make and push away the injection tube head retraction urceolus inside that the fluid column chock plug engages towards the back extreme direction of urceolus.To use like this in the needle tubing retraction urceolus later, and just can reach and avoid stabbing the safing purpose of finger.

The present invention is easy to operate, is easy to use, can be easily with the injection tube head pull-up that includes needle tubing with among the retraction urceolus, also can easily the injection tube head be pushed the location.

Simultaneously, simple structure of the present invention is easy to make, and also can reduce residual dose effectively.

Below in conjunction with drawings and Examples the present invention is described in further detail:

Fig. 1 is the three-dimensional exploded view of safety injector of the present invention;

Fig. 2 A is the side view of injection tube head among the present invention;

Fig. 2 B is the cutaway view of injection tube head among the present invention;

Fig. 2 C is the end-view of 2B;

Fig. 2 D is the axonometric chart of injection tube head among the present invention;

Fig. 3 A is for pushing away the side view of fluid column plug among the present invention;

Fig. 3 B is the end-view of 3A;

Fig. 4 A is for pushing away the travel condition sketch map of fluid column plug among the present invention, wherein urceolus and injection tube head system represents with section;

Fig. 4 B is the local amplification view that first flange of needle stand connector is replaced the oblique cutting part of outer cylinder front end inboard;

Fig. 5 is the sketch map when pushing away the fluid column plug and replacing the injection tube head of the present invention, and wherein urceolus and injection tube head system represents with section;

Fig. 6 is rotated sketch map after 90 ° for the fluid column plug that pushes away among Fig. 5; And

Fig. 7 drives in the injection tube head retraction urceolus for pushing away the fluid column plug among the present invention, and pushes away the sketch map that the fluid column stopper rod is fractureed, and wherein urceolus and injection tube head system represents with section.

See also Fig. 1 to Fig. 7:

Safety injector 10 of the present invention includes an injection tube head 30, and it is the needle stand 22 that is fixedly arranged on these needle tubing 21 bottoms by an injection needle tubing 21,, and a needle stand connector 28 that supplies these needle stand 22 usefulness are installed is formed (Fig. 1, Fig. 2 A and Fig. 2 B); One pushes away fluid column plug 20, and it is to push away fluid column stopper rod 18, one rubber grommets 12 and by one to push away fluid column chock plug 11 and formed (Fig. 1 and Fig. 3 A); An and urceolus 23, it is to hold injection tube head 30 and push away fluid column plug 20, make injection tube head 30 can be exposed to a front opening of urceolus 23, and make that pushing away fluid column plug 20 can be exposed to an open rearward end of urceolus 23 and be displaced into (Fig. 1, Fig. 4 and Fig. 5) within the injection tube head 30; The inboard of urceolus 23 front ends also is provided with an oblique cutting part 38 to replace mutually with intimate engagement (Fig. 1 with first flange 29 of needle stand connector 28, Fig. 2 A, Fig. 2 B, Fig. 2 D, Fig. 4 A, Fig. 4 B, Fig. 5 to Fig. 7), urceolus 23 rear ends inboard and be provided with one second flange 31 and push away fluid column plug 20 (Fig. 4 A and Fig. 7) to stop.

Characteristics of the present invention are, the front end that pushes away the fluid column chock plug is formed with a coupling part 13, and it can be inserted in the rear inside space of needle stand connector 28, is formed with several juts 36 (Fig. 1, Fig. 3 A, Fig. 3 B, Fig. 4 A and Fig. 5 to Fig. 7) on the side surface of coupling part 13; And be formed with a plurality of on the inner surface of the needle stand connector 28 of injection tube head 30 and jut 36 corresponding stopper sections 32 (Fig. 2 B to Fig. 2 D, Fig. 4 A and Fig. 5 to Fig. 7) that push away fluid column chock plug 11.By this, when action of injection is finished, push away fluid column plug 20, and make this coupling part 13 that pushes away fluid column chock plug 11 be inserted in the rear inside space of needle stand connector 28 (Fig. 5) against the front opening inner edge of living urceolus 23; Push away fluid column plug 18 by rotation, can make several juts 36 on the coupling part 13 engage (Fig. 6) with several corresponding stopper sections 32 of needle stand connector 28; To push away fluid column plug 20 again and pull back, and can make and push away the injection tube head 30 retraction urceolus inside (Fig. 7) that fluid column plug 11 engages towards the back extreme direction of urceolus 23.

In addition, push away fluid column chock plug 11 and push away the conical section 16 that also can form a frangibility between the fluid column stopper rod 18, its can utilization push away fluid column plug 20 with injection tube head 30 retraction urceolus 23 inside after, mat fractures conical section 16 and makes the fluid column stopper rods 18 that push away that are exposed to outside this urceolus 23 be removed (Fig. 1, Fig. 3 A and Fig. 7).Though the profile of a plurality of stopper sections 32 can have multiple variation, but the preferably is, be formed with a recess 34 (Fig. 2 D) that can be interlocked with jut 36 in several stopper sections 32 at least one, in order to prevention push away fluid column plug 20 several juts 36 be rotated (Fig. 2 D) again after several stopper sections 32 engage.The rear end of needle stand connector 28 is formed with the L-shaped outer circular edge of section 40, the front end inside of urceolus 23 then is formed with and outer circular edge 40 corresponding annular grooves 42, make outer circular edge 40 to be embedded into annular groove 42 by urceolus 23 inside, and connection injection tube head 30 and urceolus 23 (Fig. 2 B, Fig. 4 A and Fig. 5 to Fig. 7).For more preferably safety, syringe 10 also can include and protects pin medicated cap 48 to be sleeved on this injection tube head 30 (Fig. 1).

Can be provided with handguard place 24 near the open rearward end place of urceolus 23, and the rear end that pushes away the fluid column plug can be provided with by finger place 19, generally commonly use in the syringe though this class formation has seen, but push away for the purpose of the fluid column stopper rod 18 with rotation for ease of the application of force, by 19 preferablies of finger place is oval-shaped double-decker (Fig. 1, Fig. 3 A, Fig. 4 A and Fig. 5 to Fig. 7).

Claims

1 one kinds of safety injectors, it includes:

It is characterized in that:

This front end that pushes away the fluid column chock plug is formed with a coupling part, and it can be inserted in the rear inside space of this needle stand connector, is formed with several juts on the side surface of this coupling part; And

Be formed with on the inner surface of this needle stand connector of this injection tube head several and this push away the fluid column chock plug the corresponding stopper section of this jut, the rear end of this needle stand connector is formed with the L-shaped outer circular edge of section,

2. safety injector as claimed in claim 1 is characterized in that, is formed with a recess that can be interlocked with this jut at least one in these several stopper sections.

3. safety injector as claimed in claim 1 is characterized in that, this pushes away the fluid column chock plug and this pushes away the conical section that forms a frangibility between the fluid column stopper rod.

4. safety injector as claimed in claim 1, wherein, this syringe also includes and protects the pin medicated cap to be sleeved on this injection tube head.