CN203001599U

CN203001599U - Through hole piston injector

Info

Publication number: CN203001599U
Application number: CN 201220714517
Authority: CN
Inventors: 肖海良; 谢晶; 郑金路; 李小兵
Original assignee: JIANGXI SANXIN MEDTEC CO Ltd
Current assignee: JIANGXI SANXIN MEDTEC CO Ltd
Priority date: 2012-12-22
Filing date: 2012-12-22
Publication date: 2013-06-19
Anticipated expiration: 2022-12-22

Abstract

The utility model relates to a through hole piston injector. The injector consists of a jacket 1, a core rod 2 and a through hole piston 3, wherein a conical convex rib 4 is arranged on the core rod matched with the through hole piston; the core rod and the through hole piston can be easily assembled; the conical convex rib of the core rod is embedded into a piston wall body; the piston wall body tightly wraps and is in linear fit with the conical convex rib of the core rod under the action of elasticity of the piston, so that the requirement on sealing performance of the core rod and the through hole piston 3 is met, and liquor is prevented from leaking from an inner hole of the through hole piston; and meanwhile, the injector has a simple structure and is convenient to produce.

Description

The through hole piston syringe

Technical field

This utility model product relates to the through hole piston syringe.Belong to technical field of medical instruments.

Technical background

At present, the disposable syringe of conventional use through hole piston mainly is comprised of overcoat 1, common core bar 2 and through hole piston 3.Be to satisfy sealing property by both interference fit between overcoat 1 and through hole piston 3, can spray a small amount of dimethicone at overcoat 1 inwall simultaneously, meet the demands so that more easily reach greasy property when both assembling.And be also that interference fit by the cylindrical of the endoporus of through hole piston 3 and common core bar 2 satisfies sealing property between through hole piston 3 and common core bar 2, because the endoporus of through hole piston 3 does not spray dimethicone, if the magnitude of interference is bigger than normal, can be difficult when both assembling, 3 distortion of through hole piston or common core bar 2 are fractureed; If the magnitude of interference is less than normal, because the cylindrical of common core bar 2 is cylindrical, are " face coordinates " with the endoporus of through hole piston 3, cause the sealing of through hole piston 3 and common core bar 2 can not satisfy performance requirement, namely medicinal liquid easily leaks from the endoporus of through hole piston 3.

Summary of the invention

The deficiency that during for the cooperation of the through hole piston 3 that overcomes current syringe and common core bar 2, medicinal liquid leaks from the endoporus of through hole piston 3, this utility model provides a kind of disposable syringe that coordinates with the through hole piston with the core bar of conical convex tendon, the sealing that guarantees through hole piston 3 and core bar 4 satisfies performance requirement, stops medicinal liquid from the endoporus leakage of through hole piston.

the technical scheme that its technical problem that solves this utility model adopts is: a kind of through hole piston syringe, by overcoat 1, core bar 2 and through hole piston 3 form, described core bar with through hole piston cooperation place, be provided with conical convex tendon type structure, core bar both can easily assemble with the through hole piston, both after the assembling, the conical convex tendon of core bar embeds the piston wall body, under the piston elastic reaction, the piston wall body can tightly encase the conical convex tendon of core bar, both form " line cooperation ", make core bar 4 and the sealing of through hole piston 3 satisfy performance requirement, stop medicinal liquid from the endoporus leakage of through hole piston.

Effect of the present utility model is, can satisfy the sealing property requirement of core bar and through hole piston, stops medicinal liquid and leaks from the endoporus of through hole piston, easily satisfies the clinical use function of syringe desired use and product; Simultaneously simple in structure, be convenient to produce.

Description of drawings

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

Fig. 1 adopts existing core bar to coordinate the syringe of through hole piston.

Fig. 2 adopts this utility model core bar to coordinate the syringe of through hole piston.

In figure 1, overcoat; 2, core bar; 3, through hole piston; 4, conical convex tendon type structure

The specific embodiment

A kind of through hole piston syringe, formed by overcoat 1, core bar 2 and through hole piston 3, described core bar with through hole piston cooperation place, be provided with conical convex tendon type structure 4, core bar both can easily assemble with the through hole piston, both after the assembling, the conical convex tendon of core bar embeds the piston wall body, under the piston elastic reaction, the piston wall body can tightly encase the conical convex tendon of core bar, both form " line cooperation ", make the sealing of core bar and through hole piston 3 satisfy performance requirement, stop medicinal liquid from the endoporus leakage of through hole piston.

Claims

1. A through-hole piston syringe, consisting of a jacket (1), a core rod (2) and a through-hole piston (3), characterized in that: the core rod is provided with a conical Convex structure (4), the core rod can be easily assembled with the through-hole piston, and after the two are assembled, the conical rib of the core rod is embedded in the piston wall.