CN2079055U - Needleless injector - Google Patents

Abstract

The utility model relates to a needleless injector, which is composed of a hand lever compressing device, a medicine spraying device, a pressure regulator, a dose regulator and a medicine supply device, wherein, the dose regulator adopts a threaded rod and a slide nut which controls a plunger piston to agilely and exactly control dose, and meanwhile, the medicine supply device adopts a medicine supply pipe to be directly inserted the cavity wall of high-pressure medicine, which can effectively prevent the outleakage of the medicine liquid during the injection and increase the practicability of the needleless injector. Compared with the existing products of the same category, the utility model has the advantages of reasonable and simple structural design, good using effect and low cost.

Description

Needleless injector

This utility model is a kind of medical apparatus and instruments that is used to prevent epidemic and treats injection.Exactly be a kind of needleless injector that is used to inject, this needleless injector is the improvement of the described device of patented technology (CN85200273 number and CN85205608 number) that the design person is a few days ago provided.

Patent CN85200273 number described needleless injector adopts lever principle, and the power of handling the hand pressure lever generation directly compresses medicinal liquid and forms high pressure fluid column, makes medicinal liquid inject the subcutaneous purpose that reaches injection.This syringe has simple revolving type and regulates the pressure device, makes pressure in 50～300 kilograms per centimeter ²In adjustable, adapting to the needs of different accepting objects, thereby subject range is very wide.Simultaneously this needleless injector adopts harder rustless steel idol part grinding-in, has improved high pressure chest and has overcome the leakage medicine, thereby increased the service life.This in addition needleless injector can be portable, also can be fixed on the workbench, not only can avoid receiver's skin abrasion to increase safety.Can reduce operator's labor intensity again.Improved the dosage regulating device that above-mentioned patented technology provided patent CN85205608 number, the mode that the rack-and-pinion of dose adjusting in the former technology is regulated is improved to employing screw rod and control plunger sliding nut, and the turn screw rod slides nut thereon and controls the volume size that ram travel reaches the adjusting dose.Needleless injector after this improvement not only keeps advantages such as the injection of former needleless injector is rapid, safe and reliable, applied range, and the structure of its dosage regulating device more the control of advantages of simple, dose is more flexibly accurately.But go in the above-mentioned technology that provides medicine device chew, be used as medicine by being used as medicine joint, go into pencil and go into four critical pieces of pencil gland to be assembled into, mouth of pipe end face and the main body high-pressure medicine chamber oral-lateral face that is used as medicine that is used as medicine contacts and closely cooperates, and leans on will go into pencil into the pencil gland and compress and keep airtight performance.For reaching obturation effect.Require parts that higher precision is arranged.Even but improve the precision of parts, and in installation process, the be used as medicine mouth of pipe and the high-pressure medicine chamber oral-lateral face that is used as medicine, still being difficult to fully influences seal to good.Also can occur in the use leaking the medicine phenomenon and influence the accuracy that is injected into dose.

The purpose of this utility model is to improve at the shortcoming that above-mentioned needleless injector exists, for needleless injector design a kind of simple in structure, favorable sealing property go into medicine device.

This utility model is on the basis of the needleless injector technology that the design person provides a few days ago it to be gone into that medicine device carries out suitable improvement and a kind of new needleless injector that designs explains its structure below by accompanying drawing.Accompanying drawing 1 is this utility model overall construction drawing, and Fig. 2 is the structure drawing of device that is used as medicine of the present utility model for the structure drawing of device that is used as medicine, Fig. 3 of present technology.Among the figure 1, the needleless injector main body; 2, lever; 3, chemical spraying device; 4, pressure regulator; 5, medicine is put actuator; 6, go into medicine device; 7, the bend pipe that is used as medicine; 8, go into the pencil gland; 9, the high-pressure medicine chamber wall mouth that is used as medicine; 10, be used as medicine and chew; 11, the joint that is used as medicine; 12, go into pencil; 13, go into the pencil gland.

By accompanying drawing 1,3 this utility model needleless injectors, it is to make medicinal liquid produce highly compressed lever compressor by make power of lever, chemical spraying device, pressure regulator, the dose actuator, going into several parts of medicine device constitutes, its lever compressor, chemical spraying device, the structure of pressure regulator is described in CN85200273 number to some extent, and the improvement structure of dose actuator such as the structure that provided for CN85205608 number, of the present utility modelly be characterised in that it goes into medicine device is by being used as medicine bend pipe 7 and go into pencil gland 8 two parts and constitute, the bend pipe 7 that is used as medicine contacts one section and is band pin pipe with high-pressure medicine chamber wall, and this band pin pipe directly inserts high-pressure medicine chamber wall and is used as medicine and the mouth of pipe into pencil is communicated in mouthfuls 9 with the high-pressure medicine chamber, prevent when injecting that medicinal liquid from being one unidirectional time only valve from the check device of the mouth of pipe outflow of being used as medicine, its structure is installed all identical with the technology that former patent CN85200273 provided.Of the present utility modelly go in the medicine device, since be a band pin go into pencil insert high-pressure medicine chamber wall be used as medicine mouthful in (medicine chamber wall be used as medicine mouthful bore a corresponding band anti-market circular hole), be added to the contact area that pencil and high-pressure medicine chamber wall are used as medicine mouthful, very easy to reach the seal that is used as medicine between bend pipe and the high-pressure medicine chamber good with going into the pencil gland, and medicine liquid leakage occurs when promptly preventing liquid medicine injection.

Can be used as an example of the present utility model by the needleless injector structure shown in Fig. 1,3.Adopt the needleless injector of this design not only to keep the various advantages of original product, and can effectively prevent medicine liquid leakage, improve its practicality into the medicine device place.Owing to the structure of going into medicine device is simple more, the component processing required precision is low, can further reduce the cost of product in addition.

Claims (1)

1, a kind of needleless injector, it is by the hand lever compressor, chemical spraying device, pressure regulator, dose actuator and go into several parts of medicine device and constitute, it is characterized in that into medicine device be by being used as medicine bend pipe 7 and go into pencil gland 8 two parts and constitute, bend pipe one end that is used as medicine is band pin pipe, and this part inserts directly that high-pressure medicine chamber wall is used as medicine in mouthfuls 9 and is fastened on high-pressure medicine chamber wall and is used as medicine on the mouth with going into the pencil gland bend pipe that will be used as medicine.

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