CN102430175A

CN102430175A - Injector

Info

Publication number: CN102430175A
Application number: CN2011102562404A
Authority: CN
Inventors: 严慈
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-01
Filing date: 2011-09-01
Publication date: 2012-05-02

Abstract

The invention discloses an injector, which comprises a needle cylinder, a push rod and a needle head, wherein the push rod is positioned in the needle cylinder; the front end of the push rod is provided with a sealing rubber plug; the push rod is provided with an incision; the front end of the needle cylinder is provided with a Ruhr conical head; the needle head is fixed on the Ruhr conical head; the inner wall of the back end of the needle cylinder is provided with an annular groove; the outer peripheral surface of the Ruhr conical head is provided with a limiting groove; the inner peripheral surface of the front end of the needle cylinder is provided with a sealing rib and a limiting rib; the outer peripheral surface of the Ruhr conical head is provided with a limiting groove; the limiting rib is clamped in the limiting groove; the limiting rib is in hermetic fit with the outer peripheral surface of the Ruhr conical head; the front end of the push rod extends outwards to form an umbrella-shaped step; and the umbrella-shaped step can pass through the central hole of the Ruhr conical head, and is clamped by the top of the Ruhr conical head. By adopting the injector, the needle head can be effectively prevented from hurting the medical personnel, so that the injector is safer and more reliable for using; and meanwhile, by adopting the injector, residual liquid medicine in the injector can be reduced, and the liquid medicine can be prevented from being polluted, so that the injector has the advantages of environmental friendliness and saving in material consumption.

Description

Syringe

Technical field

The present invention relates to a kind of medical apparatus and instruments, particularly a kind of disposable syringe.

Background technology

Disposable syringe is widely used in medical institutions as the medical apparatus and instruments of routine; But cross infection happens occasionally for various reasons; In injection use and apparatus cleaning, because of the also corresponding increase of the example of accidental puncture bacteria infection, its height hazardness has constituted serious threat to medical personnel and sufferer personnel's life; Although appropriate authority has also been developed some new syringes, inaccessible ideal effect between type self-destroyed and safety;

China's utility patent (patent No.: 2L03253522.8) disposable safety self-ruined syringe discloses disposable safety self-ruined syringe, the push rod that it comprises needle stand, entry needle, syringe sleeve and is positioned at syringe sleeve, and push rod top is that step-like place is with the sealing plug; Fluid sealant just is provided with the elasticity bar of pulling back beyond the Great Wall; Have simple in structure easy to operately, safe and convenient to use, the patient is painless; Advantages such as self-destruction is conveniently errorless, there is following shortcoming in above-mentioned patented product through the experiment proof:

1) because the bar of pulling back is the metal material making, and fix with binding agent, be fixed on the front end of sealing plug, therefore, metal can contact with medicinal liquid with binding agent, has increased the contaminated probability of medicinal liquid;

2) bar of pulling back inserts in the needle stand, and needle stand and entry needle is drawn in later entry needle often is tilting state in the sleeve, easily because of misoperation once more here from barrel forward end, stab medical personnel;

3) front end by push rod is adhesively fixed with the bar of pulling back, and when push rod is advanced to the sleeve top, still have big space between sealing plug and the sleeve, thereby it is residual in syringe, to stay more medicinal liquid,

Summary of the invention

To the deficiency of above-mentioned prior art, the purpose of this invention is to provide a kind of safer disposable syringe.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

A kind of syringe comprises syringe, push rod, syringe needle, and said push rod is positioned at said syringe; The front end of said push rod is provided with the sealing plug; Said push rod is provided with otch, and the front end of said syringe is provided with Rule conehead, and said syringe needle is fixed on the conehead of said Rule; The inner peripheral surface of said syringe front end is provided with a sealed muscle and a spacing muscle; The outer peripheral face of said Rule conehead is provided with a stopper slot, and said spacing muscle is stuck in the said stopper slot, and the outer peripheral face of said sealed muscle and said Rule conehead is sealed and matched; The front end of said push rod stretches out and forms a umbrella shape step, and said umbrella shape step can block through the centre bore of said Rule conehead and by the top of said Rule conehead.

Preferably, the rear end of said Rule conehead forms one and unloads the power chamber, and the said power of unloading intracavity is provided with a brake hoop; The lower end of the said power of unloading cavity wall is provided with the expansion muscle; Said brake hoop card and the clamping of said expansion muscle, the outer wall of said Rule conehead is provided with the anticreep muscle, and said anticreep muscle is corresponding with said expansion muscle position; The inner peripheral surface of said syringe front end is provided with the anticreep draw-in groove, and said anticreep muscle is stuck in the said anticreep draw-in groove.

Preferably, the periphery wall of said brake hoop is provided with the corresponding expansion in said expansion muscle position protruding.

Preferably; The inwall of said back end of syringe is provided with annular groove; Said annular groove both sides form spacing preiection and form drop; In assembling process, spacing preiection and moment that push rod can strut on the syringe are under external force passed through annular groove, and said push rod is provided with and the corresponding limited step of said spacing preiection.

Preferably, the cross section of said push rod is cross.

Preferably, said syringe needle is provided with helmet.

Technique scheme has following beneficial effect: use this syringe when injection finishes; The umbrella shape step of push rod front end will pass the centre bore of Rule conehead; And when pulling back push rod, the umbrella shape step will be blocked by the top of Rule conehead, when pulling back push rod, just can Rule conehead be communicated with syringe needle like this and draw in the syringe together; So just can effectively avoid syringe needle to stab medical personnel, therefore use more safe and reliable; Adopt this syringe can reduce medicinal liquid residual in the syringe simultaneously, can avoid medicinal liquid contaminated, therefore also have environmental protection and the advantage of practicing thrift material consumption.

Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of description, below with preferred embodiment of the present invention and conjunction with figs. this patent is elaborated.

Description of drawings

Fig. 1 is the overall structure sketch map of the embodiment of the invention one.

Fig. 2 is the structural representation of the embodiment of the invention one push rod.

Fig. 3 is the structural representation of the embodiment of the invention one syringe.

Fig. 4 is the structural representation of the embodiment of the invention one Rule conehead.

Fig. 5 is the structural representation of the embodiment of the invention one syringe needle.

Fig. 6 is the overall structure sketch map of the embodiment of the invention two.

Fig. 7 is the structural representation of the embodiment of the invention two syringes.

Fig. 8 is the structural representation of the embodiment of the invention two Rule coneheads.

Fig. 9 is the structural representation of the embodiment of the invention two brake hoops.

The specific embodiment

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described in detail.

First embodiment of the invention shown in Fig. 1 to 5, this embodiment syringe comprises syringe 1, push rod 2 and syringe needle 4, push rod 2 is positioned at syringe 1; The front end of push rod 2 is provided with sealing plug 6; The cross section of push rod 2 is a cross, and push rod 2 is provided with otch 14, can make things convenient for fractureing of push rod 2 like this.

The front end of syringe 1 is provided with Rule conehead 3; Rule conehead 3 is connected in the syringe 1; In order to guarantee the fastness of sealing and clamping, the inner peripheral surface of syringe 1 front end is provided with a sealed muscle 9 and a spacing muscle 10, and the outer peripheral face of Rule conehead 3 is provided with a stopper slot 11; Spacing muscle 10 is stuck in the stopper slot 11, and sealed muscle 9 is sealed and matched with the outer peripheral face of Rule conehead 3.Syringe needle 4 is fixedly connected with Rule conehead 3, also is provided with helmet 5 on the syringe needle 4.

The front end of push rod 2 stretches out and forms a umbrella shape step 7; Umbrella shape step 7 can pass through the centre bore of Rule conehead under the impetus of external force; After umbrella shape step 7 passes through the centre bore of Rule conehead; When pulling back push rod 2, the lower surface of umbrella shape step 7 will be blocked by the top 8 of Rule conehead 3 again, will drive syringe needle 4 when push rod 2 is pulled back like this, Rule conehead 3 together gets in the syringe 1.

Extract syringe 1 when pulling back out for anti-throw-out lever 2; The inwall of syringe 1 rear end is provided with annular groove 15; The both sides of annular groove 15 form spacing preiection; Push rod 2 is provided with and the corresponding limited step 16 of spacing preiection, pulls back when push rod 2 like this and just can not pull back backward when spacing preiection 15 contacts with limited step 16 again.Adopt structure can be convenient to the assembling of push rod 2 and syringe 1 simultaneously; In assembling process; Spacing preiection and moment that push rod 2 can strut on the syringe 1 are under external force passed through annular groove 15; Make push rod 2 be inserted in the syringe 1 and realize being sealed and matched between the two, adopt this mode can realize automatization's assembling, enhance productivity.

Shown in Fig. 6-8, be another embodiment of the present invention for another example, the difference of this embodiment and embodiment one is that the rear end of Rule conehead 3 forms one and unloads power chamber 22; Unload and be provided with one in the power chamber 22 to rotating ring 18; The lower end of unloading the power cavity wall is provided with expansion muscle 20, be provided with muscle 20 corresponding expansion of expanding to the periphery wall of rotating ring 18 protruding 21,

brake hoop card

18 and 20 clampings of expansion muscle; The outer wall of Rule conehead is provided with anticreep muscle 19; Anticreep muscle 19 is corresponding with expansion muscle 20 positions, and the inner peripheral surface of syringe 1 front end is provided with anticreep draw-in groove 17, and anticreep muscle 19 is stuck in the anticreep draw-in groove 17.

Adopt above-mentioned this structure, can make the more firm front end that is connected to syringe 1 of Rule conehead 3.And after the injecting liquid drug in the syringe finishes; Only need to continue to promote forward push rod 2; Make push rod 2 promote rotating ring 18 and move forward, the convexity 21 that expands is broken away from expansion muscle 20, at this moment the anticreep muscle 19 on screw socket Rule conehead 3 can't make anticreep muscle 19 stress deformations because of the disappearance of the extraneous power of the muscle 20 that expanded; Like this and anticreep muscle 19 just can't continue to be stuck in the anticreep draw-in groove 17 on the syringe 1, the push rod 2 of at this moment pulling back just can be withdrawn into Rule conehead 3 in the syringe 1 smoothly.

Use this syringe when injection finishes; The umbrella shape step of push rod front end will pass the centre bore of Rule conehead; And when pulling back push rod, the umbrella shape step will be blocked by the top of Rule conehead, when pulling back push rod, just can Rule conehead be communicated with syringe needle like this and draw in the syringe together; So just can effectively avoid syringe needle to stab medical personnel, therefore use more safe and reliable; Adopt this syringe can reduce medicinal liquid residual in the syringe simultaneously, can avoid medicinal liquid contaminated, therefore also have environmental protection and the advantage of practicing thrift material consumption.

More than a kind of syringe that the embodiment of the invention provided has been carried out detailed introduction; For one of ordinary skill in the art; According to the thought of the embodiment of the invention, the part that on the specific embodiment and range of application, all can change, in sum; This description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.

Claims

1. a syringe comprises syringe, push rod, syringe needle, and said push rod is positioned at said syringe; The front end of said push rod is provided with the sealing plug; Said push rod is provided with otch, it is characterized in that: the front end of said syringe is provided with Rule conehead, and said syringe needle is fixed on the conehead of said Rule; The inner peripheral surface of said syringe front end is provided with a sealed muscle and a spacing muscle; The outer peripheral face of said Rule conehead is provided with a stopper slot, and said spacing muscle is stuck in the said stopper slot, and the outer peripheral face of said sealed muscle and said Rule conehead is sealed and matched; The front end of said push rod stretches out and forms a umbrella shape step, and said umbrella shape step can block through the centre bore of said Rule conehead and by the top of said Rule conehead.

2. syringe according to claim 1 is characterized in that: the rear end of said Rule conehead forms one and unloads the power chamber, and the said power of unloading intracavity is provided with one to rotating ring; The lower end of the said power of unloading cavity wall is provided with the expansion muscle; Said brake hoop card and the clamping of said expansion muscle, the outer wall of said Rule conehead is provided with the anticreep muscle, and said anticreep muscle is corresponding with said expansion muscle position; The inner peripheral surface of said syringe front end is provided with the anticreep draw-in groove, and said anticreep muscle is stuck in the said anticreep draw-in groove.

3. syringe according to claim 2 is characterized in that: said periphery wall to rotating ring is provided with the corresponding expansion in said expansion muscle position protruding.

4. syringe according to claim 1 is characterized in that: the inwall of said back end of syringe is provided with annular groove, and said annular groove both sides form spacing preiection and form drop, and said push rod is provided with and the corresponding limited step of said spacing preiection.

5. syringe according to claim 1 is characterized in that: the cross section of said push rod is cross.

6. syringe according to claim 1 is characterized in that: said syringe needle is provided with helmet.