CN2681759Y

CN2681759Y - Oval-shaped full self-damaging disposable injector

Info

Publication number: CN2681759Y
Application number: CN 200320114483
Authority: CN
Inventors: 刘光奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-07
Filing date: 2003-11-07
Publication date: 2005-03-02
Anticipated expiration: 2013-11-07

Abstract

An oval-shaped full self-damaging disposable injector which can work normally or self-damage according to the liquid pressure of the injector, comprises a theftproof needle cap (1), a needle (2), a piston (3), an outer sleeve (4), and a core rod (5). The self-damaging structure of the oval-shaped full self-damaging disposable injector is that the upper part of the core rod is fixedly connected with the middle part by a symmetrical V-shaped sheared post (8); two symmetrical pikes are positioned at the top of core rod. During the process of operation, the needle cap is twisted off firstly; when liquid medicine is sucked or air is exhausted, the core rod is not broken due to the low liquid pressure; the symmetrical V-shaped sheared rod is broken automatically due to the improved liquid pressure during the process of injection, and the piston is detached from the core rod, consequently realizing the first self-damage of the injector; the piston can only be moved forward, not backward by the broken core rod, and when the piston is pushed to the 'zero' graduation, the two pikes positioned inside the inner chamber of piston sequentially puncture the piston and the small blind hole matched with the outer sleeve, and thereby, realizing the second self-damage of the injector that all the plastic and rubber pieces are damaged.

Description

Oval full re-use preventing once-used syringe

Technical field:

This utility model relates to the self-destruction syringe of medical device industry, particularly oval full re-use preventing once-used syringe.

Background technology:

At present, known self-destruction syringe, the mode of its self-destruction has: needle retractable, puncture piston, lockup piston, locking core bar etc., they must be injected piston to " zero " graduation mark (be piston on earth), just can reach the purpose of self-destruction.If piston is not injected to " zero " graduation mark, just can not reach the purpose of self-destruction, this class self-destruction syringe all from structure stayed can reuse and cross infection may.

Summary of the invention:

Piston must be injected to the purpose of " zero " graduation mark ability self-destruction in order to overcome present self-destruction syringe, this utility model provides a kind of ellipse full re-use preventing once-used syringe, the full re-use preventing once-used syringe of this ellipse in use, can finish normal drawing liquid and get rid of residual air, and unconditionally self-destruction in injection process, the equal abolish of all plastics, rubber parts after injection finishes except that metal needle.

The technical scheme that its technical problem that solves this utility model adopts is:

Syringe utilizes syringe large and small different fluid pressure in drawing liquid, aerofluxus, injection process to make syringe operate as normal or " self-distruction structure " self-destruction.Its self-distruction structure is partly formed by two: the one, and core bar (5) partly is made up of upper, middle and lower three, between top and the middle part by one symmetric being " V " font shear fracture post (8) be fixed with one (Fig. 5,6,7), the 2nd, two acupunctures (7) that are hidden in piston cavity are arranged at core bar top.Syringe fluid pressure when drawing liquid, aerofluxus is little, shears post and can not rupture, and fluid pressure increases during injection, and core bar (5) is gone up, post fracture is automatically sheared at the middle part, and piston separates (self-destruction for the first time).Piston under the promotion of core bar after the fracture 5, can only before so that can not retreat, when piston was injected " zero " graduation mark, two acupunctures 7 that are hidden in piston cavity can puncture piston 3, urceolus 4 corresponding small blind holes (the self-destruction second time) successively.

The beneficial effects of the utility model are:

No matter whether the full re-use preventing once-used syringe piston bolus infusion processes of this ellipse is injected on earth from structure, need only one and inject, shear fracture post (8) just ruptures and self-destruction (self-destruction for the first time) automatically; When piston was injected " zero " graduation mark, two acupunctures (7) that are hidden in piston cavity can puncture the small blind hole of piston (3), urceolus (4) corresponding site (self-destruction for the second time) successively.Thoroughly stopped artificial repeated use, (Fig. 1,2,3,4) simple in structure.

The structure of oval full re-use preventing once-used syringe:

The structure of the oval full re-use preventing once-used syringe of this utility model is made up of pin medicated cap (1), syringe needle (2), piston (3), urceolus (4), core bar (5) etc., wherein the cross section of piston (3), urceolus (4), core bar (5) is ellipse, and syringe needle (2) is prior art (Fig. 1,2,3,4).It is concrete that details are as follows respectively:

Pin medicated cap 1 is the pilfer band structure, is circular cone cylindricality thin walled cavity (Figure 10,11) along the axis.Partly constitute by upper and lower and middle connecting column three.Top is the shank of pin medicated cap (1), and its small end is a blind hole, and the other end is an opening.The bottom is the matching ring of pin medicated cap and needle holder, is through-hole structure.Connected by three equidistant thin cylinders between upper and lower, the angle of the axis of thin cylinder and the axis of pin medicated cap is 90 degree.

Piston (3) is oval thin-walled cap-like structure (Figure 12,13), and its top is oval cone.Bottom opening place inner peripheral is " L " shape, and the diameter of " L " shape is less than the piston cavity diameter, and to a symmetric roundlet blind hole is arranged, the sealing ring of piston periphery is a prior art along oval major axis at the piston cavity top.

Core bar (5) is formed (Fig. 5,6,7) by upper, middle, and lower part and is structure as a whole, the piston pallet cross section on core bar top is oval, its periphery has an annular " recessed poor ", the piston pallet along oval major axis to two acupunctures that have a symmetry to make progress, be connected as a single entity by two symmetries and the shearing post (8) that is " V " type between pallet and the core bar middle part, shearing post is by two " triangular form " book sheet symmetry dislocation connections up and down, its cross section of the middle part of core bar is the cross that long and short axle intersects, and the bottom is that the ellipse that arc makes progress is pressed hands.

Urceolus (4) along the axis by before, during and after three partly form (Fig. 8,9) and be structure as a whole, the front portion is the conical cylinder needle holder, needle stand is outside to be cooperated with pin medicated cap (1), syringe needle (2) is installed in the endoporus of needle holder, the middle part is oval book wall cavity, its inner chamber front portion is a through-hole structure with needle holder, the inner chamber antetheca along oval major axis to a symmetrical roundlet blind hole is arranged, there is an annular convex " R " ring at urceolus lumen centers position, to a symmetric handguard is arranged, handguard is a prior art to afterbody along ellipse short shaft.

Cooperation of the present utility model is: pin medicated cap (1) is packed on the needle holder on urceolus (4) top, syringe needle (2) glue is solid in the syringe needle hole on urceolus (4) top, piston (3) is a tight fit in core bar (5) top " recessed poor ", the core bar of equipped good piston pack into urceolus (4) inner chamber and be the shape that is slidingly matched.

Description of drawings:

Below in conjunction with drawings and Examples this utility model is further specified.

Accompanying drawing 1 is the structure chart of this syringe, demonstration be the state that cooperatively interacts of hour hands medicated cap (1), syringe needle (2), piston (3), urceolus (4), core bar (5) of dispatching from the factory.

Fig. 2 is the left view of Fig. 1, shows that syringe urceolus cross section is oval, along ellipse short shaft to a symmetric handrail is arranged.

Fig. 3 is the state diagram after syringe exhausts medicinal liquid.What show is that medicinal liquid has been taken out full state, and " V " word that has also shown core bar top is simultaneously sheared post (8) and do not ruptured and separate (being piston and core bar or integrative-structure).

Fig. 4 is the state diagram that injector to inject finishes, demonstration be that core bar top " V " word is sheared post (8) and ruptured, the state of the blind hole of piston and syringe urceolus (4) corresponding site has been pierced through in two acupunctures (7) at core bar top.

Fig. 5 is the structure chart of core bar, the demonstration core bar is made up of upper, middle, and lower part, be structure as a whole, its middle and upper part oval piston platform periphery is that " recessed " shape is poor, cooperate with piston (3), platform upper edge major axis is to two acupunctures (7) that have symmetry to make progress, and middle cross section is the push rod that major and minor axis+word intersects, and the bottom is that the outside ellipse of lonely shape is pressed hands (6).Be to link to each other between the middle part upward, by symmetric two " V " font shear fracture posts (8) dislocation.Simultaneously shown that also piston is at the cooperation on top and each position of core bar.

Fig. 6 is the vertical view of Fig. 5, the plan structure of displayed map 5 corresponding sites, and wherein shear fracture post (8) is to overlap the structure that connects by two symmetrical triangular shape sheets.

Fig. 7 shows is state after core bar (5) self-destruction, and the post-rift state of symmetric two " V " font shear fracture posts (8) is gone up, the partial sectional view at middle part shows that its acupuncture (7), oval serving platter, core bar middle part three are structure as a whole.

Fig. 8 is the front view of syringe urceolus (4), demonstration be urceolus by left end be needle holder (for through-hole structure), the middle part is a thin-walled shape cavity, cavity inner wall has the R muscle of an annular protrusion along the middle part of axis, right-hand member is an opening, left, center, right are structure as a whole.

Fig. 9 is the left view of Fig. 8, the middle cross section that shows urceolus (4) is oval thin-walled shape cavity, at oval tail of cavity body along ellipse short shaft to a symmetric handguard (handguard is a prior art) is arranged, cavity inner wall front end edge transverse is the broken positions of two acupunctures to a symmetric small blind hole is arranged.

Figure 11 is the front view of pin medicated cap (1), shows the needle holder structure of the integral body of pin medicated cap by circular cone cylindricality thin-walled and right side, and the thin head of its pin medicated cap position is a blind hole, and needle holder position, right side is a hatch frame.

Figure 11 is the left view of Figure 10, and showing between circular cone cylindricality thin walled cavity and the split ring is connected it by equidistant three thin cylinders is integral body, and three thin cylinders for the fracture post, play the pilfer band effect when the pin medicated cap rotate, and axis and pin medicated cap axis angle are 90 to spend.

Figure 13 is piston (a 3) sectional front view, shows that it is the calotte of thin-walled, and the top is oval cone, and the inner chamber antetheca has and symmetric two small blind holes of acupuncture corresponding position, and lumen openings place periphery is " L " shape, and periphery has three " R " V-shaped rings.。

Figure 12 is the right view of Figure 13, shows that the piston cross section is oval.

Fig. 1,2,3,4 that the cooperation figure of the full re-use preventing once-used syringe of this utility model and operation principle are seen accompanying drawing, its design of part figure sees Fig. 5～13.

The specific embodiment:

Pin medicated cap (1), urceolus (4), core bar (5) all use the injection mo(u)lding in mould of medical grade high molecule plastic.Syringe needle (2) uses stainless steel material molding (current techique).Piston (3) is with the high temperature vulcanized or injection moulding in mould of medical grade rubber.

At fit on, at first be packed in syringe needle (2) in the needle holder of urceolus (4) with special-purpose adhesive, secondly piston (3) is sleeved on the piston platform on core bar (5) top, withstand core bar top piston platform below with the special tooling anchor clamps then, slowly it is pushed the top of the outer tube inner chamber of syringe of scale sign out of the press.At last needle guard (1) is contained on the needle holder, and is connected, assembly work constipation bundle with ultrasonic welding machine.The syringe that assembles is packed into after fractional pack, intermediate package, the big packing, carry out ray or oxirane disinfection at last, product just can enter the finished product storehouse.

During use:

Earlier syringe is taken out in fractional pack successively, rotation destroys needle guard, syringe needle (2) is inserted in the medicinal liquid, slowly core bar (5) is pulled outwardly, medicinal liquid is drawn in the syringe urceolus (4), the air in the Inside Syringe, just syringe needle can be thrust the injection site of human body, push core bar and press hands (6), posts (8) fracture sheared in symmetric two " V " words between core bar piston platform and the middle part at this moment, reaches the function of self-destruction for the first time.Continue the pushing core bar again, piston (3) finishes injecting liquid drug under the propelling of core bar.When piston is pushed into " zero " graduation mark, the core bar top is hidden in two acupunctures (7) of piston cavity under the effect of core bar power, pierce through the blind hole of piston (3), urceolus (4) corresponding site successively, reach the function of self-destruction for the second time, extract syringe needle, injection constipation bundle, this moment, all plastics, rubber parts all damaged fully.

Claims

1, the full re-use preventing once-used syringe of a kind of ellipse, it is cooperated and is formed by pin medicated cap (1), syringe needle (2), piston (3), urceolus (4), core bar (5), it is characterized in that: pilfer band formula pin medicated cap is enclosed on the needle holder of oval urceolus (4) admittedly, syringe needle (2) directly glue is solid in the syringe needle hole of urceolus (4), oval piston (3) and core bar top close-fitting are incorporated in to be in oval urceolus (4) inner chamber and are slidingly matched, and core bar (5) partly is made of upper, middle and lower three and has a dual self-desttruction equipment.

2, the full re-use preventing once-used syringe of ellipse according to claim 1, it is characterized in that: pilfer band formula pin medicated cap (1) is circular cone cylindricality thin walled cavity along the axis, the shank of pin medicated cap, its small end is a blind hole, and the other end is an opening, with the matching ring of needle holder, be through-hole structure, connected by three equidistant thin cylinders between the main body of pin medicated cap and the matching ring of needle holder, be structure as a whole, the angle of the axis of thin cylinder and the axis of pin medicated cap is 90 degree.

3, the full re-use preventing once-used syringe of ellipse according to claim 1, it is characterized in that: piston (3) is oval thin-walled cap-like structure, its top is oval cone, bottom opening place inner peripheral is " L " shape, the diameter of " L " shape is less than the piston cavity diameter, to a symmetric roundlet blind hole is arranged, the sealing ring of piston periphery is a prior art to the piston cavity antetheca along oval major axis.

4, the full re-use preventing once-used syringe of ellipse according to claim 1, it is characterized in that: urceolus (4) along the axis by before, during and after three partly form, be structure as a whole, the front portion is the conical cylinder needle holder, the middle part be oval book wall cavity, and the anterior and needle holder of its inner chamber is a through-hole structure, the inner chamber antetheca along oval major axis to a symmetrical roundlet blind hole is arranged, to a symmetric handguard is arranged, handguard is a prior art to afterbody along ellipse short shaft.

5, the full re-use preventing once-used syringe of ellipse according to claim 1, it is characterized in that: core bar (5) is by last, in, three parts are formed down, be structure as a whole, the piston pallet cross section on core bar top is oval, its periphery has an annular " recessed poor ", the piston pallet along oval major axis to two acupunctures that have a symmetry to make progress, be connected as a single entity by two symmetries and the shearing post (8) that is " V " type between pallet and the core bar middle part, shearing post is by two " triangular form " book sheet symmetry dislocation connections up and down, its cross section of the middle part of core bar is for long, " ten " font that minor axis intersects, the bottom is that the ellipse that arc makes progress is pressed hands.