CN201743690U - Automatic syringe - Google Patents

Abstract

Provided is an automatic syringe, which belongs to the technical field of medical appliances and comprises a needle, a needle tube and a piston. The utility model is characterized in that the piston is provided with a spring; a stay wire is disposed at the middle of the piston; a switch valve is disposed at the front end of the needle tube; a grabbing ring is disposed at the middle part of the needle tube. The utility model is advantageous in that the structure is simple; when a patient is getting an injection, the forward speed of the core rod can be controlled; the working difficulty for medical staffs is reduced.

Description

Automatic injector

Technical field: this utility model belongs to the medical instruments technical field, is a kind of automatic injector specifically.

Background technology: at present, employed clinically syringe mainly is made of syringe needle, needle tubing, piston and nook closing member, this syringe is when injecting to patient, need be by the driving velocity of medical worker's hand control core bar, the medicinal liquid flow velocity is very unstable like this, has increased great work difficulty to the medical worker.

Summary of the invention: the purpose of this utility model provides a kind of automatic injector that can control the core bar pace when injecting to patient.

The technical solution of the utility model is: comprise syringe needle, needle tubing and piston, it is characterized in that being provided with spring on piston, be provided with backguy in the middle of the piston, the needle tubing front end is provided with switch valve, and the needle tubing stage casing is provided with holds ring.

The beneficial effects of the utility model are: this utility model is simple in structure, can control the core bar pace when injecting to patient, has alleviated medical worker's work difficulty.

Description of drawings: accompanying drawing 1 is a structural representation of the present utility model.

Among the figure 1, syringe needle, 2, needle tubing, 3, piston, 4, spring, 5, backguy, 6, switch valve, 7, hold ring.

The specific embodiment: comprise syringe needle 1, needle tubing 2 and piston 3, it is characterized in that being provided with spring 4 on piston 3, be provided with backguy 5 in the middle of the piston 3, needle tubing 2 front ends are provided with switch valve 6, and needle tubing 2 stage casings are provided with holds ring 7.When injecting to patient, tractive backguy 5 aspiration medicinal liquids are closed switch valve 6 then, hold to hold ring 7 syringe needle 1 thrust the site of puncture, open switch valve 6, spring 4 promote pistons 3 automatically injection get final product.

Claims (1)

1. automatic injector comprises syringe needle (1), needle tubing (2) and piston (3), it is characterized in that: be provided with spring (4) on piston (3), be provided with backguy (5) in the middle of the piston (3), needle tubing (2) front end is provided with switch valve (6), and needle tubing (2) stage casing is provided with holds ring (7).

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