CN2853080Y

CN2853080Y - Disposable injector

Info

Publication number: CN2853080Y
Application number: CN 200520047205
Authority: CN
Inventors: 卢小兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-05
Filing date: 2005-12-05
Publication date: 2007-01-03
Anticipated expiration: 2015-12-05

Abstract

The utility model relates to a disposable syringe, which comprises an injection needle assembly and a medicine containing assembly, wherein the injection needle assembly comprises a needle cylinder (1) and a piston moving injection needle (2) as well as an operational handspike (3) pushing the piston moving the injection needle (2). From back to head, the medicine containing assembly comprises a base cylinder (4), a liquid medicine piston (5), a back sleeve (6) and an injection handle (7). Push the handlespike (3), release the compressed air, the compressed air quickly push the piston moving needle ahead and inject into the muscle of the patient. By the same way, the retreat of needle is also activated by releasing the compressed air. The present device has the advantages of simple construction, intensified workmanship, excellent performance in massive production, lower cost and easy popularity. No need of auxiliary power resources, small volume and convenient to be taken with. The compressed air stored is just for one time use and classified as self disposed style. The quick movement of injection and retreating can minimize the pains suffered by the patient during injection. The device is highly automatic and can reduce the requirement for the skill of the operator.

Description

Disposable syringe

(1) technical field under

This utility model relates to a kind of medical sanitary apparatus, particularly relates to a kind of disposable portable intramuscular injection device.

(2) background technology

Known, existing ordinary syringe, generally manually inject by the medical worker, operation receiveing person's contact that the operator is frequent and different, the vertical and level that pathogenic bacteria is taken place easily infects, and operating operation has higher requirements to operator's skill, thicker metal injection causes big painful at the injection object, depth of needle can not quantitatively be controlled, and is re-used by illegal flowing back to again again in order to prevent used syringe, must manually unmake to it.

At present, in order to overcome above-mentioned shortcoming, for the improvement of syringe, design has become the focus of concern again, but does not all have ideal solution.

The patent No. 00218319.6 " muscle automatic injector ", 00218320.X " muscle automatic injector syringe " this two patent has proposed the evolutionary approach of syringe, be matching used, having proposed syringe cylinder is assemblied on the power source, but have fast speed ground and finish the suction medicine automatically, penetrate pin, blood back, the technical scheme of the whole injection process advantage of the injection and the withdraw of the needle, but, also there is deficiency in this scheme, its action of injection is that the general injection device moves, structure is complicated, manufacturing process difficulty, cost height, and outside plus-pressure source in addition must be arranged, needing to rely on other plant equipment could use, and inconvenience is moved and carried, operation inconvenience.

(3) summary of the invention

The purpose of this utility model is at above-mentioned deficiency, and intending provides a kind of the needs to dispose pressure source in addition, is easy to carry, and structure is simpler, is easy to make and use, and syringe is motionless during injection, only the improvement syringe that moves back and forth fast of injection needle.

The purpose of this utility model is so to realize.

This disposable syringe is by penetrating needle part and injection parts two parts are formed.

It is penetrated needle part and is moved by compound syringe, piston again and penetrate pin and push control rod three parts constitute.

Compound syringe is made up of inside and outside cylinder-shaped sleeve, and an inside and outside telescopic end face is that syringe needle penetrates, returns face, and the center has the small sircle hole pin hole, for the syringe needle turnover.Trocar sheath is offered long chute mouth at the latter half of syringe needle access hole, carries out application piston for push control rod therein and moves the advance and retreat of penetrating pin.Inner sleeve inside is to move for piston to penetrate the place that pin moves back and forth therein, divide forward and backward two sections, leading portion is a needle-storing chamber, the space that syringe needle is placed, and back segment is the inflator chamber, there is an interventricular septum front and back between two Room, interventricular septum central authorities offer penetrates the pin slide opening, moves the front and back of penetrating after the pin glissile segment is inserted in of penetrating pin for piston and moves back and forth, and both cooperatively interact well, can slide, not have leakage, the gas blowby of Compressed Gas again.At the inflator locular wall of back segment, front and back position is offered withdraw of the needle pore and inserting needle pore.Have near the rear of withdraw of the needle pore one little outside bead, be the spacing bead of piston end plate.Chuck between the inner and outer pipe leans on the preceding cavity segment of syringe needle access hole to form pressure air chamber, the Compressed Gas of perfusion sealing in the pressure air chamber.Back cavity segment at the inner and outer pipes chuck is a sub-air chamber, is provided with valve between sub-air chamber and the pressure air chamber, and the inwall front and back position of chuck has two aforesaid withdraw of the needle pore and inserting needle pores.The outer wall of chuck is offered aforesaid long chute mouth.

Piston moves to be penetrated pin and is made up of for three sections front and back, and leading portion is a needle section, can enter the intramuscular of needle receiver; Back segment is enclosed within the inner chamber of compound syringe for penetrating the pin glissile segment, can move back and forth; Afterbody piston end plate, when the pressed gas of the pressure source of compound syringe enters the front side or the rear side of piston end plate respectively, the compressing piston moves penetrates that pin penetrates forward or the withdraw of the needle backward; Lead to and pass through three sections, central part has thin diameter medicine stream pipe, outpours for medicinal liquid.

Push control rod has an evagination handle, promotes to handle for the end user; It is rectangular tubular that push control rod is, an end is a gag, the valve of the pressure air chamber of obstruction and compound syringe, offer two pores before and after the rectangular tubular segments, air inlet and back venthole promptly, when push control rod is opened pressure air chamber's air bag of compound syringe, Compressed Gas is entered by preceding air inlet in the rectangular tubular segments of push control rod and manages, and, promote piston and move the forward-reverse of penetrating pin from back venthole discharge.

When sliding forward with hand propelled push control rod evagination handle, at the valve of opening in the pressure air chamber, simultaneously, before air inlet stretch into pressure air chamber, Compressed Gas is entered by preceding air inlet in the rectangular tubular segments of push control rod and manages, and discharges from the back venthole, Compressed Gas enters the inflator chamber by the inserting needle pore of compound syringe, promote the piston end plate, piston is moved penetrate pin and release forward, needle section is injected patient's intramuscular.

Injection finishes, and the operator continues to carry out forward with the handle of hands with push control rod, makes the withdraw of the needle pore of back venthole facing to compound syringe, Compressed Gas oppositely enters the front portion of inflator chamber piston end plate, piston moved penetrate pin and push back backward, syringe needle is finished injection to extract out from patient's intramuscular rapidly.

The injection parts by base plate tube, medicinal liquid piston, back shelves cover, penetrate part such as medicine handle and form.

The base plate tube is the cup shape of stockless, and at bottom protrusion one thin cylinder, central part is the priming pipe of blank pipe, stretches into aforesaid piston and moves in the medicine stream pipe of penetrating pin, carries medicinal liquid to use during for injection.The base plate of base plate tube props up the rear portion of compound syringe, sealing inflator chamber.The cup-shaped stack shell of base plate tube is fitted in the afterbody trocar sheath of compound syringe, and its inner chamber is as cartridge case, takes out storage at behind the medicine.

The medicinal liquid piston is the circular seal of being with handgrip, moves to take out medicine or medicine is penetrated in extruding in the cartridge case of base plate tube, and its handgrip is controlled it and whether promoted forward by the medicine handle of penetrating of tail end.

One back interstage sleeve is arranged between the cartridge case of the handgrip of medicinal liquid piston and base plate tube, and back interstage sleeve can move at the cartridge case inner chamber, and forms the pressure gas storage chamber mutually with medicinal liquid piston, cartridge case.Back interstage sleeve compresses the medicinal liquid piston, and the rear portion is penetrated the medicine handle and pinned, and both are integral, and the operator spurs with hands backward, can aspiration medicinal liquid.Penetrate the medicine handle when opening, the pressed gas in the pressure gas storage chamber forces space enlargement, the medicinal liquid piston is pushed open mutually with the back interstage sleeve separated, and back interstage sleeve is blocked by interior only button of the rear port of cartridge case backward, can not move, and the medicinal liquid piston can only be pushed medicinal liquid forward and penetrate.

This apparatus structure is simple relatively, and processing technology is strong, can adopt plastic injection-moulded processing and manufacturing, is easy to produce in enormous quantities.Cost is lower, and the patient is easy to accept economically, is convenient to promote the use of.It does not need attached power source in addition, and the similar present ordinary syringe of volume can be carried easily, in all case uses.The configuration of its pressed gas, only enough once coming and going used, and therefore, belongs to from unmaking, and can not reuse again, reaches the purpose of safety and sanitation.

This device is penetrated pin, withdraw of the needle speed is fast, and misery was lighter when the patient accepted to inject.

This device is penetrated pin, withdraw of the needle automaticity height, has reduced the injection technique requirement to the operator.

(4) description of drawings

Fig. 1 is according to the structure master's cutaway view that the utility model proposes disposable syringe.

Fig. 2 is penetrating the structure cutaway view of needle-like attitude according to the utility model proposes disposable syringe.

Fig. 3 is according to the utility model proposes the structure cutaway view of disposable syringe at withdraw of the needle state.

Among the figure: 1 compound syringe, 1-1 pin hole, 1-2 pressure air chamber, 1-3 valve, the long chute mouth of 1-4,1-5 inflator chamber, 1-6 inserting needle pore, 1-7 sub-air chamber, the spacing bead of 1-8,1-9 withdraw of the needle pore, 1-10 needle-storing chamber; 2 push control rod, air inlet before the 2-1 gag, 2-2, the rectangular pipeline section of 2-3,2-4 handle, venthole behind the 2-5; 3 pistons move penetrates pin, the 3-1 needle section, and 3-2 medicine stream pipe, 3-3 piston end plate, 3-4 penetrates the pin glissile segment; 4 base plate tubes, 4-1 base plate, 4-2 priming pipe, 4-3 cartridge case; 5 medicinal liquid pistons, 6 back interstage sleeves, 7 penetrate the medicine handle, and 8 transfer needle guard to emit.

(5) specific embodiment

Before the injection, the back interstage sleeve (6) of injection parts compresses medicinal liquid piston (5), and its rear portion penetrated medicine handle (7) and pin, and both become one, and the operator pulls back back interstage sleeve (6) with hands, medicinal liquid can be pumped in the cartridge case.

During injection, evagination handle (2-4) with hand propelled push control rod (2) slides forward, at the valve of opening in the pressure air chamber (1-3), at this moment, preceding air inlet (2-2) on the push control rod (2) stretches into pressure air chamber (1-2), Compressed Gas is entered the interior pipe of the rectangular pipeline section (2-3) of push control rod by preceding air inlet (2-2), discharge from back venthole (2-5), the inserting needle pore (1-6) of Compressed Gas by compound syringe (1) that is stored in the pressure air chamber (1-2) enters inflator chamber (1-5), promote piston end plate (3-3), piston moved penetrate pin (3) and release forward, needle section (3-1) is injected patient's intramuscular.

At this moment, the moving medicine handle (7) of penetrating of plate, be stored in that the pressed gas between interstage sleeve (6) and medicinal liquid piston (5) expands rapidly behind the injection parts, promoting medicinal liquid piston (5) separates with back interstage sleeve (6), back interstage sleeve (6) is blocked and can not move by interior only button of the rear port of cartridge case (4-3) backward, and medicinal liquid piston (5) is pushed medicinal liquid forward and penetrated.

Injection finishes, the operator continues to carry out forward with the handle (2-4) of hands with push control rod (2), make the withdraw of the needle pore (1-9) of back venthole (2-5) facing to compound syringe (1), Compressed Gas oppositely enters the front portion of inflator chamber (1-5) piston end plate (3-3), piston moved penetrate pin (3) and push back backward, needle section (3-1) is extracted out from patient's intramuscular rapidly, finishes injection.

Claims

1. disposable syringe is characterized in that, by penetrating needle part and injection parts two parts are formed,

Penetrate needle part by compound syringe (1) be inserted in wherein piston and move and penetrate pin (2), and carry out piston and move push control rod (3) three parts of penetrating pin (2) and constitute,

The injection parts from front to back, by base plate tube (4), medicinal liquid piston (5), back shelves covers (6), penetrate medicine handle (7) and form.

2. according to the described disposable syringe of claim 1, it is characterized in that, compound syringe (1) is by interior, the Outer cylindrical sleeve pipe is formed, in, an end face of trocar sheath is pin hole (1-1), the latter half of trocar sheath, offer long chute mouth (1-4), the inner leading portion of inner sleeve is needle-storing chamber (1-11), back segment is inflator chamber (1-5), interventricular septum central authorities offer and penetrate pin slide opening (1-10) between two Room, front and back, before the wall of the inflator chamber of back segment (1-5), after offer withdraw of the needle pore (1-9) and inserting needle pore (1-6), at rear spacing bead (1-8) is arranged near withdraw of the needle pore (1-9), in, the preceding cavity segment of the chuck between the outer tube is pressure air chamber (1-2), perfusion closed compression gas in the pressure air chamber (1-2), back cavity segment at the inner and outer pipes chuck is sub-air chamber (1-7), is provided with valve (1-3) between sub-air chamber (1-7) and the pressure air chamber (1-2).

3. according to the described disposable syringe of claim 1, it is characterized in that, piston moves to be penetrated pin (2) and is made up of for three sections front and back, leading portion is needle section (3-1), back segment is for penetrating the inner chamber that pin glissile segment (3-4) is enclosed within compound syringe (1), afterbody is piston end plate (3-3), leads to pass through three sections, and central part has thin diameter medicine stream pipe (3-2).

4. according to the described disposable syringe of claim 1, it is characterized in that push control rod (3) has evagination handle (2-4), it is rectangular tubular that push control rod is, an end is gag (2-1), forward and backward preceding air inlet (2-2) and the back venthole (2-5) offered of rectangular pipeline section (2-3).

5. according to the described disposable syringe of claim 1, it is characterized in that, base plate tube (4) is the cup shape of stockless, the priming pipe (4-2) of bottom protrusion one thin cylindrical center blank pipe, base plate (4-1) props up the rear portion of compound syringe (1), the cup-shaped stack shell of base plate tube (4) is cartridge case (4-3), medicinal liquid piston (5) is the circular seal of being with handle, tail end locks together with back interstage sleeve (6) by penetrating the handgrip of medicine handle (7) with medicinal liquid piston (5), back interstage sleeve (6) moves at cartridge case (4-3) inner chamber, with medicinal liquid piston (5), cartridge case (4-3) forms the pressure gas storage chamber mutually, storage pressure gas.