CN202982804U

CN202982804U - Low-resistance injector

Info

Publication number: CN202982804U
Application number: CN 201220737725
Authority: CN
Inventors: 简玉梅; 陈来龙; 饶平华; 王继军
Original assignee: JIANGXI HONGDA MEDICAL EQUIPMENT GROUP CO Ltd
Current assignee: JIANGXI HONGDA MEDICAL EQUIPMENT GROUP CO Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-06-12
Anticipated expiration: 2022-12-28

Abstract

The utility model discloses a low-resistance injector. The low-resistance injector consists of an outer cover, a pushrod and an injection needle. The pushrod consists of a core rod, a rubber plug and a rubber plug bushing. The pushrod is arranged in the outer cover. The low-resistance injector is characterized in that only a sealing ring is adopted for the rubber plug; a V-shaped circular groove is formed on each of the upper and lower end faces of the rubber plug; embedded bumps and antiskid raised lines are arranged on the bottom surface of the rubber plug bushing; antiskid clamping positions are arranged on the inner walls of the antiskid raised lines; and a plurality of undercut clamping positions are uniformly arranged on the head part of the core rod. A using method for the conventional injector is not changed, and liquid medicine can be sucked into the injector or injected from the injector with weak withdrawing or injection force by medical staff, so that the working strength of the medical staff is weakened to a great extent, and working efficiency is improved.

Description

A kind of injection with low resistance

Technical field

This utility model relates to a kind of medical apparatus and instruments of injection, especially relates to a kind of injection with low resistance.

Background technology

At present, the syringe that medical field is commonly used is comprised of overcoat, plug and core bar substantially.The head that plug is enclosed within core bar forms push rod, the push rod overcoat inner chamber of packing into, the interference fit by plug and outer casing inner wall reaches sealing state, make syringe aspirate, during liquid medicine injection and the phenomenon of leakage do not occur.In order to ensure sealing, no leakage fully, the plug of the syringe that uses clinically coordinates tension with the overcoat inner chamber, cause medical personnel aspirate, during liquid medicine injection, not only labor intensity increase, and time-consuming.Publication number is that the Chinese invention patent of CN102631731A discloses a kind of injection with low resistance, but the meeting when aspiration medicinal liquid of this kind syringe, piston seal place's generation minimal shrink might cause air to enter in the overcoat annular seal space, cause and extract less than medicinal liquid, medicinal liquid is contaminated simultaneously.Notification number is that the utility model patent of CN201022890Y discloses a kind of low resistance inspirator rubber stopper, but this kind plug wall thickness is larger, easily shrinks, and causing occurring plug can not seal fully with outer casing inner wall.

Summary of the invention

The purpose of this utility model be to provide a kind of if with less power just can suction, liquid medicine injection, reduction medical personnel's working strength, time saving and energy saving, good airproof performance, the injection with low resistance of increasing work efficiency.

The purpose of this utility model is achieved in that

a kind of injection with low resistance, formed by overcoat, push rod and entry needle, push rod is comprised of core bar, plug and plug lining, push rod is packed in overcoat, feature is: the upper cannelure that is processed with opening upwards on the plug upper surface of the plug of tubular, be processed with the lower cannelure that Open Side Down on the plug lower surface, the longitudinal section of upper cannelure and lower cannelure is all V-shaped, and periphery is provided with sealing ring in the plug upper surface of plug, end, basifacial center is provided with the anti-skidding raised line that is positioned at inner ring at the bottom of the lining of plug lining, place, basifacial outer face is provided with the embedding projection that is positioned at the outer ring at the bottom of the lining of plug lining, and embed the height of projection lower than the height of anti-skidding raised line, the longitudinal section is that the embedding projection of V-type can be embedded in the upper cannelure of V-type fully, anti-skidding card article is nested into from the top down in the plug inner chamber of plug fully and closely cooperates with the plug inner chamber, the plug upper surface of plug and the center end face of plug lining are fitted, the plug lower surface of the raised line lower surface of anti-skidding raised line and plug is concordant, be provided with the anti-skidding screens of annular in the inwall lower end of anti-skidding raised line, several back-off screens have been evenly arranged around the head of core bar, in lining inner chamber in the anti-skidding card article of the head insertion plug lining of core bar, the back-off screens of head slips over the anti-skidding screens of plug lining inner chamber fully, the plug lower surface of plug and the supporting surface of core bar recline, form core bar, plug and a plug lining three and be integrated and not eely push rod, the sealing ring of plug and outer casing inner wall are close to and are sealed.

The upper cannelure of V-type and the angle [alpha] of lower cannelure are 30 degree～45 degree, the height of upper cannelure and lower cannelure be the height of 1.5mm～2.0mm or upper cannelure and lower cannelure be plug height 1/5.

The outer face of plug lining exceeds 0.5mm～1.0mm than the plug upper surface of plug.

The height of back-off screens is 0.6mm～1.0mm.

This utility model in use, is the same with traditional injector for medical purpose operating procedure, does not change operator's use habit, but can reduce the working strength of medical personnel when suction, liquid medicine injection.

This utility model in use, first the conehead with adaptive entry needle and syringe screws, and takes out the protective sleeve of entry needle.Entry needle is inserted in medical liquid container, by pull push rod mode, medicinal liquid is drawn in syringe.In the process of pull push rod, can form a subatmospheric negative pressure in the annular seal space of overcoat, this moment, plug and plug lining will be attracted forward, but the plug lining blocks because of the back-off screens of its anti-skidding screens quilt core bar and is unable to stir any more, therefore, plug will be stopped by the plug lining, cause the upper cannelure of plug further to be withstood by the embedding projection of plug lining, so micro-deformation that plug is extruded and occurs outwards to open, make the plug sealing more intact, air can not enter the inner chamber of overcoat, therefore can complete smoothly the suction of medicinal liquid.When with the injector to inject medicinal liquid, entry needle is inserted in the human body or container that needs injection, by promoting the push rod mode, medicinal liquid is injected in human body or container.In the process that promotes push rod, can form one in the annular seal space of overcoat higher than atmospheric malleation, this moment, plug and plug lining will be repelled outward, but be subject to the stopping of supporting surface of core bar, the micro-deformation that causes plug to be extruded and occur outwards to open, make the plug sealing more intact, medicinal liquid can not ooze out the inner chamber of overcoat, therefore can be by completing smoothly injecting of medicinal liquid.

This utility model is the syringe that adopts a circle to seal, and traditional injector for medical purpose is to adopt the sealing of two circles or three circles to guarantee the sealing of syringe, encloses the syringe of sealing but its sliding capability obviously is inferior to one.

The utlity model has if with less power just can suction, liquid medicine injection, reduction medical personnel's working strength, time saving and energy saving, good airproof performance, the advantage of increasing work efficiency.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of core bar in Fig. 1;

Fig. 3 is the cutaway view of plug in Fig. 1;

Fig. 4 is the enlarged drawing of A section in Fig. 3;

Fig. 5 is the cutaway view of plug lining in Fig. 1.

The specific embodiment

Below in conjunction with embodiment and contrast accompanying drawing this utility model is described in further detail.

A kind of injection with low resistance is comprised of overcoat 1, core bar 2, plug 3, plug lining 4 and entry needle 5.

Be processed with the upper cannelure 31 of opening upwards on the plug upper surface 35 of the plug 3 of tubular, be processed with the lower cannelure 34 that Open Side Down on plug lower surface 33, the longitudinal section of upper cannelure 31 and lower cannelure 34 is all V-shaped, the upper cannelure 31 of V-type and the angle [alpha] of lower cannelure 34 are 30 degree～45 degree, the height h of upper cannelure 31 and lower cannelure 34 be the height h of 1.5mm～2.0mm or upper cannelure 31 and lower cannelure 34 be plug 3 height H 1/5,35 peripheries are provided with a sealing ring 32 in the plug upper surface of plug 3;

center end face 47 places in 41 bottoms, lining bottom surface of plug lining 4 are provided with the anti-skidding raised line 43 that is positioned at inner ring, 46 places, outer face in 41 bottoms, lining bottom surface of plug lining 4 are provided with the embedding projection 42 that is positioned at the outer ring, and embed the height of projection 42 lower than the height of anti-skidding raised line 43, the longitudinal section is that the embedding projection 42 of V-type can be embedded in the upper cannelure 31 of V-type fully, anti-skidding raised line 43 is nested into from the top down in the plug inner chamber 36 of plug 3 fully and closely cooperates with plug inner chamber 36, fitted in the plug upper surface 35 of plug 3 and the outer face 46 of plug lining 4, the plug lower surface 33 of the lower surface 44 of anti-skidding raised line 43 and plug 3 is concordant, the outer face 46 of plug lining 4 exceeds 0.5mm～1.0mm than the plug upper surface 35 of plug 3, be provided with the anti-skidding screens 48 of annular in the inwall lower end of anti-skidding raised line 43,

Be evenly arranged the back-off screens 22 of 3～5 0.6mm～1.0mm height around the head 21 of core bar 2, in lining inner chamber 45 in the anti-skidding raised line 43 of the head 21 insertion plug linings 4 of core bar 2, the back-off screens 22 of head 21 slips over the anti-skidding screens 48 of plug lining inner chamber 45 fully, the plug lower surface 33 of plug 3 and the supporting surface 23 of core bar 2 recline, and form a core bar 2, plug 3 and plug lining 4 threes and are integrated and not eely push rod; Push rod is packed in overcoat 1, and sealing ring 32 and overcoat 1 inwall of plug 2 are close to and seal.

Claims

1. injection with low resistance, formed by overcoat, push rod and entry needle, push rod is comprised of core bar, plug and plug lining, push rod is packed in overcoat, feature is: the upper cannelure that is processed with opening upwards on the plug upper surface of the plug of tubular, be processed with the lower cannelure that Open Side Down on the plug lower surface, the longitudinal section of upper cannelure and lower cannelure is all V-shaped, and periphery is provided with sealing ring in the plug upper surface of plug, end, basifacial center is provided with the anti-skidding raised line that is positioned at inner ring at the bottom of the lining of plug lining, place, basifacial outer face is provided with the embedding projection that is positioned at the outer ring at the bottom of the lining of plug lining, and embed the height of projection lower than the height of anti-skidding raised line, the longitudinal section is that the embedding projection of V-type can be embedded in the upper cannelure of V-type fully, anti-skidding raised line is nested into from the top down in the plug inner chamber of plug fully and closely cooperates with the plug inner chamber, the plug upper surface of plug and the center end face of plug lining are fitted, the plug lower surface of the raised line lower surface of anti-skidding raised line and plug is concordant, be provided with the anti-skidding screens of annular in the inwall lower end of anti-skidding raised line, several back-off screens have been evenly arranged around the head of core bar, in lining inner chamber in the anti-skidding raised line of the head insertion plug lining of core bar, the back-off screens of head slips over the anti-skidding screens of plug lining inner chamber fully, the plug lower surface of plug and the supporting surface of core bar recline, form core bar, plug and a plug lining three and be integrated and not eely push rod, the sealing ring of plug and outer casing inner wall are close to and are sealed.

2. injection with low resistance according to claim 1, it is characterized in that: the upper cannelure of V-type and the angle [alpha] of lower cannelure are 30 degree～45 degree, the height of upper cannelure and lower cannelure be the height of 1.5mm～2.0mm or upper cannelure and lower cannelure be plug height 1/5.

3. injection with low resistance according to claim 1 and 2 is characterized in that: the outer face of plug lining exceeds 0.5mm～1.0mm than the plug upper surface of plug.

4. injection with low resistance according to claim 3, it is characterized in that: the height of back-off screens is 0.6mm～1.0mm.