CN2638751Y - Safety syringe with retractable need - Google Patents

Abstract

The utility model discloses a safety syringe with a retractable needle tip, which is composed of a needle tip, a sheath, an outer sleeve and a fixed-range plunger, wherein the sheath is sheathed at the external side of the needle tip, and a fixed-range plunger in arranged in the outer sleeve, and comprises a core bar and a rubber plug. A needle stand is fixed at the most significant end of the outer sleeve by a needle guard, and the end is an 'H-shaped' flange. The head part of the core bar is a long and thin cylinder, and the front end of the head part is a square opening. The square opening and a convex rib arranged at the opening of the square opening form a clamp groove that is matched with the flange arranged at the end of the needle stand. A ring-shaped groove is arranged at a quarter place of the header end of the core bar. The needle head of the utility model can be retractable in a cavity of the outer sleeve after injection use, the core bar can be broken off, the hurt of the human body can be prevented, and the repeated use can be avoided. The utility model has the characteristics of disposable use, safety, sanitation, and easy recovery and processing.

Description

A kind of needle point safety injector that can bounce back

Technical field:

This utility model relates to a kind of novel hypodermic syringe, particularly a kind of needle point safety injector that can bounce back.

Background technology:

Facts have proved of modern medicine, for avoiding to the input of the mankind or animal or cross infection takes place when taking out medium, hypodermic syringe must disposable use, is using later promptly as garbage disposal.Using at present maximum disposable syringes is one by the cavity syringe, syringe needle and the journey piston of deciding that is fitted in the syringe are formed, the existing greatest problem of this syringe is after injection finishes, its syringe needle still is trapped in the outside, sharp-pointed degree with respect to syringe needle, it not only is the carrying of syringe rubbish, destroying makes troubles, often take place because of the thing of stabbing the medical and nursing work personnel accidentally simultaneously, this the secondary cross infection of pathogenic bacteria just inevitably can occur, particularly be used to suffer from serious infectious disease (as acquired immune deficiency syndrome (AIDS) for those, hepatitis, SARS etc.) syringe of patient's use, the medical hidden danger that can not ignore especially, practice shows, the damage that the needle stick injuries that dangerous needle set causes obviously causes more than other accidents.

In addition, though traditional syringe is referred to as disposable syringe, it is actual to be a kind of call that falls short of the reality, because of the back before use structure no change of this syringe, can reuse fully, this point often is used to reap staggering profits by some, not treated or the disinfecting just to bring and reuse a little syringe used or that return, thereby the life security that has threatened people greatly.What be worth pointing out a bit is, syringe after being abandoned, may be brought by some junkie and reuse, while is because of the reusability of syringe, make the shared syringe of they several people become possibility, this just brings junkie great infected danger, and often also giving simultaneously, their people of contact has caused harm.

In recent years, along with it is found that disposable syringe do not had good people reclaim use repeatedly after, in having proposed self-destruction syringe at the end of last century.Can destroy voluntarily after self-destruction syringe uses or locked and can not reuse, as the relevant expert point out, the type self-destroyed safety type that is not equal to, though avoided the repeated use of syringe, but the problem of stabbing that needle point exposes is not resolved.

The utility model content:

The purpose of this utility model is to provide a kind of disposable safe type syringe, and after injection was used, retractable needle was in the overcoat cavity, core bar is broken, to prevent to injure human body, avoid reusing, have disposable, safety, health, the easy effect of recycling.

For achieving the above object, this utility model is achieved through the following technical solutions:

A kind of needle point safety injector that can bounce back is by needle point, sheath, overcoat with decide the journey piston and form; Sheath is socketed in the outside of needle point; Describedly decide the journey piston and be arranged in the overcoat, comprise core bar and plug two parts, it is characterized in that: needle stand is fixed on overcoat foremost by needle guard, and its afterbody is one " worker " font structure flange; The head of core bar is an elongate cylinder, and its front end is a square opening, and the prominent muscle that square opening and its opening part are provided with forms a draw-in groove, matches with the flange of needle stand afterbody; The optional position of core bar can be provided with ring groove, is preferably disposed on 1/4th places of head end.

The afterbody of above-mentioned needle stand is a square opening draw-in groove, and the core bar head is the flange of one " worker " font structure.

During use, promote to decide the journey piston, medicinal liquid is squeezed penetrates, after injection finishes from needle point, decide the journey piston and be pushed to the top of overcoat inner chamber, the draw-in groove of the flange of needle stand afterbody and core bar head fastens, this moment drop-down piston, needle point will be pulled together along with piston, till the retaining line that pulls down to the overcoat interior extremity, needle stand and needle point enter overcoat fully, subsequently, core bar are fractureed in the groove self-destruction.Adopt above design, on the one hand syringe syringe needle after use is recessed in the overcoat, solved, avoided the secondary cross infection of pathogenic bacteria because of syringe needle exposes the problem of stabbing the people; On the other hand,, syringe is scrapped using later at once, fundamentally stopped the reusable medical hidden danger of syringe because of the self-destruction of core bar fractures.

Description of drawings:

Fig. 1, stereochemical structure constitutional diagram of the present utility model;

Fig. 2, stereochemical structure exploded view of the present utility model;

Section of structure before Fig. 3, this utility model injection;

Section of structure after Fig. 4, this utility model injection;

Section of structure after receiving in Fig. 5, this utility model syringe needle;

The three-dimensional structure diagram of Fig. 6, this utility model needle seat and piston rod,

Fig. 7, partial enlarged drawing of the present utility model;

Section of structure after the injection of Fig. 8, another embodiment of this utility model.

The specific embodiment:

Shown in Fig. 1,2,3,4,5,6,7, this utility model provides a kind of needle point safety injector that can bounce back, by needle point 1, sheath 2, overcoat 3 with decide journey piston 4 and form.Needle point 1 adopts glue to be connected on the needle stand 5, and needle stand 5 relies on the quiet frictional force between needle stand 5 and needle guard 6 sides to be fixed on needle guard 6 the insides together, and needle stand 5 afterbodys are one " worker " font structure flange 51; The combination that needle point 1, needle stand 5 and needle guard 6 threes form utilizes the draw-in groove 61 of needle guard 6 opening parts and the cooperation of overcoat groove 31 and the close-fitting effect on both inclined-planes to be fixed on overcoat 3 foremost.Decide journey piston 4 and be arranged in the overcoat 3, can spur back and forth, be made up of core bar 41 and plug 42 two parts, plug 42 is installed in core bar 41 front ends, seals; The head of core bar 41 is an elongate cylinder, and there is the hole 411 of a square sectional cylinder the inside, and the opening in hole is provided with the prominent muscle 4111 of annular, and both form a square draw-in groove, match with the flange 51 of needle stand 5 afterbodys; Core bar 41 is provided with ring groove 412 at head end 1/4th places, and is promptly broken under the effect of certain shearing force.In addition, be socketed in the sheath 2 of needle point 1 outside, be used for protecting untapped needle point 1, bring convenience for the packing of syringe and carrying simultaneously.

During use, promote to decide journey piston 4, medicinal liquid is squeezed penetrates, after injection finishes from needle point 1, decide journey piston 4 and be pushed to the top of overcoat 3 inner chambers, the flange 51 of needle stand 5 afterbodys fastens with the draw-in groove 412 of core bar 41 heads, this moment drop-down piston 4, needle point 1 and needle stand 5 will be pulled together along with piston 4, pull down to up to core bar 41 till the retaining line 32 of overcoat interior extremity, needle stand 5 and needle point 1 enter overcoat 3 fully, subsequently, core bar 41 are fractureed in groove 413 places self-destruction.Adopt above design, on the one hand syringe needle point 1 after use is recessed in the overcoat 3, solved, avoided the secondary cross infection of pathogenic bacteria, the recycling of back also easy to use garbage because of needle point 1 exposes the problem of stabbing the people; On the other hand,, syringe is scrapped after use at once, fundamentally stopped the reusable medical hidden danger of syringe because of the self-destruction of core bar after pulling back for 41 times fractures.

As shown in Figure 8, provide another kind of embodiment of the present utility model, a kind of needle point safety injector that can bounce back is by needle point 1, sheath 2, overcoat 3 with decide journey piston 4 and form; Sheath 2 is socketed in the outside of syringe needle 1; Decide journey piston 4 and be arranged in the overcoat 3, comprise core bar 41 and plug 42 two parts.Described needle stand 5 is fixed on overcoat 3 foremost by needle guard 6, and its afterbody is an elongate cylinder, and the cylinder the inside is a square opening 51, and the prominent muscle 511 that square opening and its opening part are provided with forms a draw-in groove 52; The head of described core bar 41 be one " worker,, font structure flange 411, this flange 411 matches with the draw-in groove 52 of needle stand 5 afterbodys.Other structures are identical with embodiment one with compound mode.

During use, promote to decide journey piston 4, medicinal liquid is squeezed to be penetrated from needle point 1, after injection finishes, decide journey piston 4 and be pushed to the top of overcoat 3 inner chambers, the flange 411 of core bar 41 heads and needle stand 5 afterbody draw-in grooves 52 fasten, this moment drop-down piston 3, needle point 1 and needle stand 5 will be pulled together along with piston 3, pull down to up to core bar 41 till the retaining line 32 of overcoat 3 interior extremity, needle stand 5 and needle point 1 enter the overcoat inner chamber fully, subsequently, core bar 41 fractures at groove 413 places, to reach the purpose of self-destruction.

Claims (3)

1, a kind of needle point safety injector that can bounce back is by needle point, sheath, overcoat with decide the journey piston and form; Sheath is socketed in the outside of needle point; Describedly decide the journey piston and be arranged in the overcoat, comprise core bar and plug two parts, it is characterized in that: needle stand is fixed on overcoat foremost by needle guard, and its afterbody is one " worker " font structure flange; The core bar head is an elongate cylinder, and its front end is a square opening, and the prominent muscle that square opening and its opening part are provided with forms a draw-in groove, matches with the flange of needle stand afterbody.

2, the safety injector of retractable needle as claimed in claim 1 is characterized in that: core bar is provided with ring groove at head end 1/4th places.

3, the safety injector of retractable needle as claimed in claim 1 is characterized in that: the afterbody of described needle stand is a square opening draw-in groove, and the core bar head is one " worker " font structure flange.

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