CN2601682Y - Perforating type Self-breaking disposable syringe - Google Patents

Abstract

The utility model discloses a perforation self-destruction disposable safety syringe, which belongs to the manufacturing and application fields of medical treatment and laboratory equipments, and has improved the shortcomings and weak points of the self-destruction disposable safety syringe in a comprehensive and systematic way. The utility model is mainly characterized in that: a hollow agnail (10) and a thicken pointed sleeve (6) of the agnail is adopted; when the center drilled piston (comprises 15 and 16) is pushed to the front-end (11) of the syringe (19), the agnail can punch automatically and pierce the septum (17) fixed on a piston, which can lead to gas leakage and loss of liquid pumping and injection functions; an obvious inner protuberance (22) is added to destroy the possibility that the piston is reused once being took out of the syringe and added membrane; a screw-thread fixture (9) is added in the neck (8) to prevent the slip of neilsbed; the design free of blind corner can guarantee that no bubble is produced in the syringe; the obvious inner protuberance (22) can prevent the harmful content from polluting the outer environment after the piston is pulled out, and the reusing of the piston after being added membrane. The utility model is mainly used in clinical injection and the sampling and fluid transfer in the laboratory. The IDUs users can be prevented from sharing the needle.

Description

Perforation self-destruction type disposible safety syringe

This utility model relates to the manufacturing and the application of medical treatment and laboratory equlpment.

Carrying out the transition to disposable use plastic injector by glass syringe is that make progress greatly in one of this manufacturing field, has saved the time of operator's cleaning and autoclaving syringe, has brought operational convenience.Yet, in use found reusable phenomenon, destroyed sterile working's principle, caused hidden danger to safety injection.So the syringe push-pull bar formula disposable syringe that fractures occurred, required the operator to inject to finish the back damage that initiatively stenosis of push-pull bar fractureed.Action is difficult to reach for some reason yet this initiative fractures.The lawless person in use having occurred reclaims disposable syringe after the use in a large number and repacks and sell the phenomenon of reaping staggering profits; Shared syringe caused nosocomial infection to the child when the shared syringe of IDU person (IDUs) caused may propagating of the wide-scale distribution of the HIV (human immunodeficiency virus) that causes acquired immune deficiency syndrome (AIDS) (being called for short HIV) and hepatitis B, hepatitis C, hepatitis D virus and planned immunization in addition.More than three big phenomenons prove absolutely that in the market there is obvious defects in the disposable syringe of selling various brands, similar in " disposable use design ".Therefore be badly in need of self-destruction type disposable syringe product so that eliminate the out of date product of design.

Through the update search of self-destruction type disposable syringe patent documentation, detect relevant patent 505 remainders altogether, wherein the world patent that is protected in China (WO) totally 87 remainders.Relevant Chinese utility model patent detects 59 remainders altogether, comprising foreign corporation or individual Chinese patent in China's application.

With regard to the design principle of self-destruction type disposable syringe background technology, not outer five types: 1) locking-type; 2) disengaged; 3) puncture type; 4) syringe needle withdrawal formula blocking type and 5).Because most existing patented technologies do not reach perfect level in design as yet, qualified self-destruction type disposable syringe is sold on market at present minority only, and be external product, for example Spain BD company product and Britain STAR company product.

Most prior aries shortcoming in design can reduce: 1) reasonable in design, but complex structure causes production cost to improve, and loses price competitiveness on market; 2) reasonable in design, but the processes level is difficult to reach, for example product is made the back because of there being the dead angle can't the demoulding; The thrust of using during 3) except that injection, reach self-destruction also needs extra thrust or increases a positive action (for example syringe needle withdrawal formula), can not guarantee that each operator or automatic operator can both accomplish; 4) piston can be extracted out outside the injection tube before the injection, after destroying self-desttruction equipment, reach nonexpondable purpose, and directly in injection tube, pour heroin into for IDUs and use then from the hemodilution drugs and bring convenience, cause blood pollution in wide area injection tube inner surface, the chance of nosocomial infection, particularly HIV, hepatitis B, hepatitis C and hepatitis D virus have obviously been increased; 5) after the self-destruction syringe is slightly dealt with, reusable again, for example lock the position and be exposed to outside the injection tube cervical region, cut (cutting) and go can repeatedly use again behind the locking card (head); 6) taken into full account self-destroying function, ignored the design of safety injection, caused sterile working's principle to be damaged, or external environment is subjected to the pollution of harmful content in the syringe; 7) or above some shortcoming have both at the same time.

The purpose of this utility model is the shortcoming and defect at above prior art, improve comprehensively and systematically, provide a kind of brand-new, to this utility model applying date end still unexposed that delivered, simple in structure, manufacturing process is uncomplicated, self-destruction and safety take into account, the perforation self-destruction type disposible safety syringe of producing in batches with commercialization (Destruct Single Use Safefy Syringe by Puncturing is hereinafter to be referred as DSUSSP) that is fit to various capacity.

This utility model is realized by following assembly: a kind of DSUSSP, by newly designed: 1) with the extension of injection needle body and be close to the sharp hollow agnail and 2 that the band point sleeve pipe of extension is formed) center drilling piston and the fixing barrier film of going up the membranaceous thing of air-tightness form the self-desttruction equipment of boring a hole, and newly add 3) needle stand and injection tube neck thread fixture and 4) the injection tube rear end is with the safety operation device of the obvious inner process of hot-working manufacturing.

This utility model is by perforation-gas leakage-interior exocoel air pressure balance, lose drawing liquid and function of injection and reach the self-destruction purpose, and the assembly by this utility model particular design and device are realized in following mode: the syringe assembling finishes when selling, barrier film on the piston and hollow agnail keep certain distance, and are blocking an anti-skidding square active card between tube handle and the handle.When the operator began to operate, forward end promoted piston and is stopped by card, was unlikelyly bored a hole by agnail unintentionally.Pulling is after piston extracts liquid backward, and active card comes off voluntarily because of action of gravity, with syringe needle vertically upward, gets rid of the air in the injection tube, injects then or the transfer of liquid.When piston is about to reach the front end of injection tube, run into the part that the injection tube diameter enlarges slightly, under the situation that thrust equates, piston quickens to reach shallow tapered front end, thereby makes agnail pierce through the purpose that the barrier film on the piston reaches perforation and leaks gas.

In order to prevent to reuse, when producing, piston inserted the injection tube deep after, make the obvious inner process of any alternative shape manufacturing in the injection tube rear end with heat processing technique, prevent to reuse after piston and push-pull bar from taking out again blooming.And prevent to extract out before the IDUs injection piston and in injection tube, pour the heroin drugs into and use and after hemodilution, carry out bang, cause tangible pollution.

The safety operation of syringe realizes in the following manner by existing and newly-designed assembly and device: the syringe needle after the needle shield protection sterilization does not puncture outer packaging bag and causes germ contamination; Inject antipollution needle sting people of needle shield and contaminated environment on the back cover that finishes; Anti-skidding locking cap can prevent the needle body slippage; The screw fixing device of needle stand and injection tube cervical region guarantees that needle stand does not come off; The shallow taper configurations that the agnail device does not have dead angle and syringe front end can prevent that bubble from producing; It is outer and pollute that the obvious inner process of syringe rear end prevents that piston push-pull rod from pulling out tube.The screw fixing device of needle stand and cervical region wherein, the no dead angle design of agnail and the obvious inner process of injection tube rear end are the design that this utility model increases newly.

The beneficial effects of the utility model have been to overcome the shortcoming or the weak point of above-mentioned home and abroad patent family design.Advantage is: 1) self-destruction and safety have been carried out comprehensively and the improvement of system, the self-destruction dependable performance has improved the safety of operating simultaneously; 2) structure is uncomplicated, and manufacturing cost increases few; 3) thrust increases not obviously during self-destruction, does not also need the extra action damage syringe of a kind of initiative; 4) can self-destruction before injection because of mistake or no intention action; 5) debris after the telescopic design of agnail band point will be injected is reduced to bottom line, thereby has reduced the waste of injection; 6) stopping IDUs directly topples over drugs and carries out from hemodilution in syringe; 7) for once there is not reusable probability extremely service life.In sum, this utility model is compared with most self-destructive syringe prior aries, has substantive distinguishing features and significantly progressive.

Below in conjunction with the drawings and specific embodiments this utility model is described in further detail:

Fig. 1 is the section full figure of this utility model embodiment along axis.

Fig. 2 is that the preceding state of living in of use shown in Figure 1 is along axis section detail drawing.

Fig. 3 is that injection back self-destruction state shown in Figure 1 is along axis section detail drawing.

Fig. 1 illustrates, this utility model is by needle shield (1), hollow needle body (3) and needle stand (5), hollow agnail (10) and be with sharp sleeve (6), the piston that elastic seal ring of center drilling (15) and support tube (16) are formed, injection tube (19) and push-pull bar (20) constitute.Avoiding in repeated use and the security consideration, design the corresponding position of scrobicula ring and needle stand in the peristome inboard of needle shield and designed the snap ring (7) that shallow bulge loop is formed, block needle shield and fix it, prevent that needle shield from coming off automatically, do not make needle point (2) puncture aseptic package bag; Fixedly needle stand of negative and positive screw fixing device (9) has been designed in inboard and injection tube cervical region (8) outside at needle stand, and needle stand can not come off when guaranteeing to take off needle shield, and assurance sterile working and hollow agnail can slippage when guaranteeing self-destruction keeps the perforation function; Anti-skidding locking cap (4) prevents the slippage when operation of hollow needle body, guarantees the safety of injection and the function of hollow agnail; Hollow agnail is formed by the extension of hollow needle body, the band point sleeve composition that overcoat is close to hollow agnail increases thick hollow agnail, be characterized in not needing to establish in addition the fixture of hollow agnail, simplify the structure and increased slightly the diameter of hollow agnail, the thorn cut that prevents barrier film (17) is blocked by thick liquid, fill up the inner chamber of injection tube cervical region simultaneously with sharp sleeve, the debris after the injection has been dropped to floor level, reduced the waste of injection; The support tube push-pull bar place that is close to center drilling has designed air duct (21), and the air pressure balance in order to injection tube inner chamber (13) and injection tube exocoel (14) makes inner chamber lose negative pressure function, thereby loses drawing liquid and function of injection and self-destruction; Locate to have designed injection tube diameter expansion section (18, dotted line is confined the district) slightly at the front end (11) of injection tube, advance in order to piston forward, and the thrust during the broken barrier film of the hollow agnail of not obvious increasing; After piston inserts injection tube when producing, designed the obvious inner process made from heat processing technique (22) at the inner chamber place of injection tube rear end (12), guarantee that piston is not drawn out outside the injection tube, its function is that the harmful content (for example HIV, hepatitis B, hepatitis C and hepatitis D virus etc.) that prevents injection tube pollutes external environment and prevents to reuse behind the blooming; Block the anti-skidding active card (25) of going up rectangular structure during the assembling syringe between tube handle (23) and handle (24), prevent that no intention action from causing self-destruction to lose efficacy, card comes off automatically because of action of gravity during drawing liquid, and piston is pushed ahead smoothly when guaranteeing injection.

Fig. 2 is that the preceding state of living in of use shown in Figure 1 is along axis section detail drawing.The assembly numbering is identical with Fig. 1, assembly and the structure that can observe syringe more detailedly.

Fig. 3 is that the self-destruction state is along axis section detail drawing after the injection shown in Figure 1, and the assembly numbering is identical with Fig. 1, can examine the assembly and the self-destruction principle of syringe in more detail closely.

This utility model has a plurality of concrete implementation methods, in this description for example and accompanying drawing be optimal way of the present utility model.

Claims (7)

1, a kind of perforation self-destruction type disposible safety syringe has carried out comprehensively and the improvement of system the shortcoming and defect part of self-destructive syringe prior art.It is characterized in that providing hollow agnail to puncture on the center drilling piston fixed barrier film and cause perforation gas leakage, lose drawing liquid and function of injection and reach the purpose of self-destruction; Increase thick hollow agnail and fill up injection tube cervical region inner chamber and make the debris after the injection reduce to bottom line, reduced the waste of injection; The shallow conical design of injection tube front end and newly-increased hollow agnail do not have the dead angle design and prevent that bubble from producing, and guaranteed safety injection; Newly-increased screw fixing device prevents the needle stand slippage between injection tube cervical region and the needle stand, guarantees the perforation function of aseptic safety operation and agnail; The injection tube rear inside is abolished recessive inner protuberant ring, makes obvious inner process into, prevent piston extract out after again blooming reuse and be harmful to content and pollute external environment; Set up active card between tube handle and the handle, the no intention action before preventing to use causes self-destruction and lost efficacy.

2, according to right 1 described device, sharp, the increasing diameter that it is characterized in that the hollow agnail (10) that syringe is formed by the extension of hollow needle body (3) and be close to that the hollow band point sleeve (6) that falls forms is slightly gone up fixed barrier film (17) to the piston (15,16) of the hollow agnail of injection tube cervical region (8) inner chamber and center drilling and is constituted the self-desttruction equipment of boring a hole.The front end (11) that is pushed into injection tube (19) when piston is located, and increases thick hollow agnail and punctures barrier film perforation gas leakage on the piston, loses drawing liquid and function of injection and self-destruction.

3, device according to claim 1 is characterized in that increasing cervical region (8) inner chamber that thick hollow agnail (6,10) fills up injection tube (19), makes the debris after the injection reduce to bottom line, reduces the waste of medicinal liquid and vaccine.

4, device according to claim 1 is characterized in that the no dead angle design at the injection tube front end region of the hollow agnail that increases newly, prevent aerofluxus after bubble produce, guaranteed safety injection.

5, device according to claim 1 is characterized in that newly-increased screw fixing device (9) between injection tube cervical region (8) outer surface and needle stand (5) inner surface, prevents the needle stand slippage, guarantees the function of aseptic safety operation and hollow agnail.

6, device according to claim 1, the inner chamber place, rear end (12) that it is characterized in that injection tube (19) has abolished recessive inner protuberant ring, make obvious inner process (22) into, prevent that piston (15,16) and push-pull bar (20) from extracting behind the injection tube again blooming out and reusing and be harmful to content and pollute external environment.

7, device according to claim 1 is characterized in that setting up active card (25) between a handle (23) and the handle (24), causes self-destruction to lose efficacy because of faulty operation or no intention action before preventing to use.

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