CN2239267Y - Dual-cavity automatic syringe - Google Patents

Abstract

The utility model relates to a medical automatic injector with two cavities, and the medical automatic injector with the two cavities is composed of an emission part and an injection administration part. The emission part is provided with a top cap, an emission outer sleeve, a safety ring, a spring seat, a spiral spring and a push rod. The injection administration part is provided with an injection outer sleeve, a chain, a medicine pipe bolt, a needle head, a medicine pipe with two compartments, a toothed knife for the medicine pipe, a U-shaped steel wire and a silicon rubber piston. The utility model has the advantages that volume size is rational, a user can automatically reassemble the utility model without tools, and injection success ratio is high. The utility model is suited to be used when a person urgently needs to inject two kinds or more than two kinds of medicines into the self body for some reasons to self rescue and mutually rescue, and stability of the medicines is lowered after the medicines are mixed.

Description

Two chamber automatic injectors

This utility model relates to a kind of injector for medical purpose, particularly a kind of two chambeies (two Room) automatic injector.

Automatic injector, for certain reason is badly in need of injecting liquid drug is designed to self intravital people, when wartime poisoned because of never poison in the position, the confession soldier injected during self and mutual medical aid, field first aid when chemical accident takes place, saving oneself etc. when being used for shock, coronary heart attack during field construction generation wound.At present, external automatic injector, the U.S., Britain, Sweden have and appear in the newspapers, but all exist the injecting cavity volume too small, and the refitting technology is complicated, needs specialist tools or professional refitting.

Two chambeies (two Room) syringe is used for its stability reduction after medicament mixed, and two or more medicines that storage life descends or medicine and solvent separately two chambeies are placed, and use preceding the mixing, to reach the effect that does not influence incompatibility and stability.The sample of present Sweden, complex structural designs, technical conditions require high.

The new purpose of this practicality just is to overcome at present the shortcoming of automatic injector technology both at home and abroad, provide a kind of volume size rationally, technology and uncomplicated, user oneself do not need can reset by instrument the two chamber automatic injectors that injection success rate is high.

This utility model is to realize like this.

This utility model is made up of the two large divisions, radiating portion and drug administration by injection part.Radiating portion has top cover and emission overcoat outward, relieving ring, and there are spring base, helical spring, push rod in inside.Spring base slightly is longer than columnar emission overcoat, overcoat is stretched out at its head end and middle part, head end is for there being the screw of a few external screw threads, a circular protrusion behind the screw, it after the projection its middle part, the middle part slightly is narrower than footpath within the emission overcoat, can be in overcoat before, move the back, and the rear portion branches into and has at interval four or three, and in the middle part of slightly being coarser than, place in the emission overcoat,, and fixed by convex interval of overcoat inner spring seat rear portion branch compartment by protruding block within the head end in the overcoat is stopped, prevent its rotation, to slightly outwards raising, the cylinder that covers in the top cover is peripheral anterior in its branch's tail end, among every branch in the rear portion to annular convex is arranged.Push rod is contained in the spring base, slightly be longer than spring base, head end is oblate cylindricality, the middle part is petal cylindrical body for cylindrical or cross section, and postmedian slightly caves in and is cylinder, and is corresponding with rear annular convex among the spring base, the bulging of afterbody elder generation is for slightly being coarser than the cylinder of postmedian, and then interior receipts are conical, just in time can insert in the cylinder in the top cover, and thickness, the degree of depth are suitable.When loading onto spring, the cylinder of spring base postmedian annular convex and push rod postmedian caves in and fastens, and spring is in spring base, after the push rod front end, before the postmedian.Relieving ring is internal diameter and the suitable large semicircle ring-type of spring base middle part external diameter, and when section broad, relieving ring snapped in the spring base middle part, spring was fixed in the spring base, between push rod head end and the middle rear end; Transfer to relieving ring, pinch the spring base head end, press down top cover, then launch overcoat head end reach from the spring base middle part to contact with its head end circular protrusion, spring base tail end and the cylinder in the top cover be peripheral further contact and outside raise, its postmedian interior to annular convex with outside, cave in the push rod postmedian and to separate, spring then in rear end and the spring base postmedian to annular convex contact, and before push rod, the drive drug administration by injection is partly injected.User oneself card is insured and is encircled in the spring base middle part, presses down push rod, and push rod drives spring, gets final product fixing spring between push rod head end and postmedian, in the spring base.

The drug administration by injection part has injection overcoat, chain, pencil latch outward, in syringe needle, two compartments (or three compartments) pencil, pencil serrated knife arranged, protect needle guard, U shaped steel silk and silicone rubber piston.U shaped steel silk is worn the silicone rubber piston, and then passes the push rod head end, and along spring vertically extend in the spring and push rod middle part between.Two compartment pencils (A, B) internal diameter is suitable with piston diameter, interior powder charge thing.

Pencil A is on silicone rubber piston one side, and the two ends envelope has thin film, or silicone rubber piston one end thin film is sealed piston, nearly pencil B one end external diameter is smaller, the nearly pencil A end of pencil B internal diameter is suitable with it, and pencil A inserts pencil B, both intersection areas, the pencil serrated knife edge of a knife is arranged over against pencil A, and almost contact, pencil B syringe needle one end have the paraffin sealing, and syringe needle stretches out pencil B, for the needle guard that protects with vertical cyclic spring fold entangles, prevent to pollute.There is nut injection overcoat rear end, with the screw of the spring base head end at emission position mutually stricture of vagina close, and be threaded to fixing and do not screw, its front end central seal is a thin film or thin-layer silicon rubber, makes things convenient for syringe needle to penetrate.Injection overcoat extroversion has vertical burr, is convenient to user and discerns under the dark ground situation.Chain connects the relieving ring at emission position and the pencil latch of drug administration by injection part, and the pencil latch is the U type, and it is inside to inject overcoat certainly, and cross the injection overcoat, and contact with pencil B head end, stop moving of pencil B, syringe needle, protect needle guard in the case, within injection overcoat the place ahead of latch.

During use, user screws the injection overcoat earlier, and at this moment, the pencil latch forces pencil A and B more approaching, and the pencil serrated knife is severed the thin film between pencil A, B, and two pipes communicate, and jolting makes mixing.Hold emission overcoat and injection overcoat then, thumb is to living top cover, and the injection overcoat is aimed at injection site (as big leg outer side or upper arm triangular muscle), transfers to relieving ring and pencil latch, power a little, then spring drives push rod, and push rod presses down the silicone rubber piston, and elastic force is also pushed pin down and passed pinhead sleeve, injection overcoat front film is thrust human body, piston moves forward along pencil, and medicine comes downwards to syringe needle along pencil A, B, thereby moment enters human body.After stopping for 5 seconds, can transfer to.The each inside that only need change the drug administration by injection part is pencil, and pencil serrated knife, pinhead sleeve, syringe needle can use repeatedly.

This utility model behind the pencil latch, can also have a packing ring before pencil B head end, gall pencil B when preventing turn injection overcoat.

This utility model also can have three pencils, the similar above-mentioned pencil A in its contact site, B contact site.A pencil after promptly pegging graft between pencil successively has diaphragm seal, has pencil serrated knife and thin film close in the last pencil.

It is reasonable to the utlity model has volume size, and user does not need instrument to reset voluntarily, the advantage that injection success rate is high.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a sketch map of the present utility model.

Among the figure, (1) top cover, (2) emission overcoat, (3) relieving ring, (4) spring base, (5) spring, (6) push rod, (7) injection overcoat, (8) pencil A, (9) pencil B, (10) pencil serrated knife, (11) thin film, (12) syringe needle, (13) protect needle guard, (14) U shaped steel silk, (15) silicone rubber piston, (16) pencil latch, (17) chain.

Top cover (1) is a dome, and its introversion has columnar structured; Emission overcoat (2) is cylindrical shape or nearly cylindrical shape, to head end the convex block is arranged in it, and there is a convex longitudinally at its middle part at interval, and relieving ring (3) is large semicircle ring-type and section broad; Spring base (4) head end is a screw, a circular protrusion behind the screw, the middle part is for slightly being narrower than the tubular of (2) internal diameter after the projection, the rear portion branches into and has three or four branches at interval, its afterbody is outer slightly to be raised, among the branch in the rear portion to annular convex is arranged; The oblate cylinder of push rod (6) head end, middle part are that cylinder or cross section are petal cylindrical body, and postmedian caves in and is cylinder, and the bulging of afterbody elder generation is the cylinder that slightly is coarser than postmedian, and then interior receipts are cone; Injection overcoat (7) rear end is a nut, and the front end central seal is a thin film or thin-layer silicon rubber, and its extroversion has vertical burr; Pencil A (8) is the cylinder of diaphragm seal for two ends, and its anterior external diameter is smaller; Pencil B (9) rear portion internal diameter is bigger, and is suitable with the anterior external diameter of pencil A (8), and nearly needle end is the paraffin sealing; The pencil serrated knife is in (8), (9) intersection area, and the edge of a knife is over against pencil A; Thin film (10) is pencil A (a 8) head end thin film; Syringe needle (12) is at pencil B front end; Protect needle guard (13) and vertically have annular resilient fold; U shaped steel silk (14) and silicone rubber piston (15) be injection direction fixedly, prevents to rock; Pencil latch (16) is the U type, crosses the injection overcoat, before pencil B (8) head end; Chain (17) connects pencil latch (16) and relieving ring (3).

Claims (4)

1. a chamber automatic injector is made up of the two large divisions, and radiating portion and drug administration by injection part is characterized in that radiating portion, and top cover and emission overcoat are arranged outward, relieving ring, and there are spring base, helical spring, push rod in inside; Spring base slightly is longer than columnar emission overcoat, overcoat is stretched out at its head end and middle part, head end is for there being the screw of a few external screw threads, a circular protrusion behind the screw, it after the projection its middle part, the middle part slightly is narrower than footpath within the emission overcoat, the rear portion branches into and has at interval four or three, and slightly be coarser than the middle part, place in the emission overcoat, by protruding block within the head end in the overcoat is stopped, and a convex by overcoat inner spring seat rear portion branch compartment is fixed at interval, to slightly outwards raising, the cylinder that covers in the top cover is peripheral anterior in its branch's tail end, among every branch in the rear portion to annular convex is arranged; Push rod is contained in the spring base, slightly be longer than spring base, head end is oblate cylindricality, the middle part is petal cylindrical body for cylindrical or cross section, and postmedian slightly caves in and is cylinder, and is corresponding with rear annular convex among the spring base, the bulging of afterbody elder generation is for slightly being coarser than the cylinder of postmedian, and then interior receipts are conical, just in time can insert in the cylinder in the top cover, and thickness, the degree of depth are suitable; The cylinder of spring base postmedian annular convex and push rod postmedian caves in and fastens, and spring is in spring base, after the push rod front end, before the postmedian; Relieving ring is internal diameter and the suitable large semicircle ring-type of spring base middle part external diameter, and when section broad, relieving ring snapped in the spring base middle part, spring was fixed in the spring base, between push rod head end and the middle rear end.

2. two chamber automatic injectors according to claim 1 is characterized in that the drug administration by injection part, and injection overcoat, chain, pencil latch are arranged outward, in syringe needle, two compartment pencils, pencil serrated knife arranged, protect needle guard, U shaped steel silk and silicone rubber piston; U shaped steel silk is worn the silicone rubber piston, and then passes the push rod head end, and along spring vertically extend in the spring and push rod middle part between; Two compartments (A, B) pencil internal diameter is suitable with piston diameter, interior powder charge thing; Pencil A at the silicone rubber piston on one side, two ends envelopes has thin film, or silicone rubber piston one end thin film seals piston, and nearly pencil B one end external diameter is smaller, the nearly pencil A end of pencil B internal diameter is suitable with it, pencil A inserts pencil B, and there is the pencil serrated knife edge of a knife both intersection areas over against pencil A, and almost contact, pencil B syringe needle one end has the paraffin sealing, and syringe needle stretches out pencil B, for the needle guard that protects with vertical cyclic spring fold entangles; There is nut injection overcoat rear end, with the screw of the spring base head end at emission position mutually stricture of vagina close, its front end central seal is a thin film or thin-layer silicon rubber; Injection overcoat extroversion has vertical burr; Chain connects the relieving ring at emission position and the pencil latch of drug administration by injection part, and the pencil latch is the U type, and it is inside to inject overcoat certainly, and crosses the injection overcoat, contacts with pencil B head end.

3. two chamber automatic injectors according to claim 1 and 2 is characterized in that before pencil B head end, behind the pencil latch, a packing ring can be arranged also.

4. two chamber automatic injectors according to claim 1 and 2 is characterized in that having three pencils, peg graft successively in the contact site between pencil and pencil, and back one pencil has diaphragm seal between pencil, has pencil serrated knife and thin film close in the last pencil.