CN205268756U

CN205268756U - Injector

Info

Publication number: CN205268756U
Application number: CN201620015059.2U
Authority: CN
Inventors: 毛文光; 宋晓峰; 陈守光; 高飞; 刘海江; 张展
Original assignee: WEIHAI ENTRY-EXIT INSPECTION AND QUARANTINE BUREAU
Current assignee: Shandong Weigao Group Medical Polymer Co Ltd
Priority date: 2016-01-08
Filing date: 2016-01-08
Publication date: 2016-06-01
Anticipated expiration: 2026-01-08

Abstract

The utility model discloses an injector, including cylinder and syringe needle, the syringe needle includes the steel needle, go up needle file and hypodermic needle seat, the front portion at last needle file is installed to the steel needle, be equipped with filtering component on the hypodermic needle seat, filtering component includes non return flap and fixed part, fixed part is connected with the hypodermic needle seat, its junction forms an annular groove, fixed part's middle part is hollow structure, the non return flap install on fixed part, opening and shutting of control inlet and liquid outlet, non return flap's periphery valve is opened during the extraction liquid medicine, the annular groove becomes the inlet, during the injection liquid medicine, non return flap's centre valve opens, fixed part's hollow structure becomes liquid channel, be equipped with filtration membrane on the liquid channel that the inlet or the hollow structure of annular groove formation formed. The extraction during liquid medicine get into from liquid inlet channel, flow from liquid channel during the injection liquid medicine, sets up filtration membrane at liquid outlet or inlet and can realize medicine filtration, convenient to use.

Description

Syringe

Technical field

The utility model relates to medical instruments field, is specifically related to a kind of syringe.

Background technology

Disposable syringe is widely used in the fields such as medical treatment, if syringe does not have filtering function, when extracting medicine, vaccine etc. from ampoule or cillin bottle, open glass chip that glass ampoule bottles produces, glue bits particulate that puncture XiLin bottle plug produces all can enter syringe with liquid, directly liquid is injected the process of human muscle or vein, also the particulate in liquid, chip, impurity are all injected into tissue to have suffered, these external foreign matters, by patient causes serious infringement, threaten the life of patient time serious. The syringe filtering syringe needle of Chinese patent CN202538080U mono-kind improvement, comprises needle tubing portion and connection section, and connection section is connected with needle tubing portion, and connection section is provided with filter house. This kind of filtering needle structure relatively simply, easily process, but liquid suction and release are same passages, if not changing injection needles during injection, major part can be injected and be entered human body by the impurity of filter house; Again change its inconvenient operation of syringe needle, Renewal process exists by the risk of bacterium or the pollution of virus simultaneously.

Practical novel content

The purpose of this utility model be to provide a kind of structure simple, can effectively filter when extracting impurity in liquid, injection without the syringe changing syringe needle.

Syringe of the present utility model, comprise syringe and entry needle, entry needle is arranged on the cone head of syringe, described entry needle comprises draw point, upper needle stand and lower needle stand, described draw point is arranged on the front portion of needle stand, lower needle stand is provided with filter assemblies, filter assemblies comprises non-return flap and fixing part, fixing part is connected with lower needle stand, its junction forms an annular recesses, the middle part of fixing part is hollow structure, non-return flap is arranged on fixing part, the folding of control fluid inlet and liquid outlet, the periphery valve extracting non-return flap during liquid is opened, annular recesses becomes fluid inlet, during liquid medicine injection, the center valve of non-return flap is opened, the hollow structure of fixing part becomes liquid outlet channel, the fluid inlet that formed at described annular recesses is or/and be provided with filtering membrane on the liquid outlet channel that formed of hollow structure.

Described filtering membrane is welded in annular recesses, has cavity structure between filtering membrane and non-return flap.

Described filtering membrane is welded on the liquid feeding end of hollow structure.

The utility model has the advantages that increasing filter assemblies in entry needle distinguishes feed pathway and liquid outlet channel, when extracting liquid, liquid enters from feed pathway, during liquid medicine injection, liquid flows out from liquid outlet channel, at liquid outlet or/and fluid inlet arranges filtering membrane can realize pharmaceutical filtration, it may also be useful to convenient.

Accompanying drawing explanation

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

Fig. 2 is the structural representation of the utility model needle stand.

Flow direction schematic diagram in needle stand when Fig. 3 extracts liquid.

Flow direction schematic diagram in needle stand when Fig. 4 is liquid medicine injection.

1 syringe, 11 cone heads, 2 entry needles, 21 times needle stands, needle stand on 22,23 draw points, 24 fixing parts, 241 hollow structures, 2411 liquid feeding ends, 2412 outlet ends, 25 non-return flaps, 251 periphery valves, 252 center valves, 26 annular recessess, 27,28 filtering membranes, 29 cavitys.

Embodiment

As depicted in figs. 1 and 2, syringe of the present utility model, comprises syringe 1 and entry needle 2, and entry needle 2 is arranged on the cone 11 of syringe, and described entry needle 2 comprises draw point 23, upper needle stand 22 and lower needle stand 21. Described draw point 23 is arranged on the front portion of needle stand 22, lower needle stand 21 is provided with filter assemblies, filter assemblies comprises non-return flap 25 and fixing part 24, fixing part 24 is connected with lower needle stand 21, its junction forms an annular recesses 26, the middle part of fixing part 24 is hollow structure 241, and non-return flap 25 is arranged on fixing part 24, the folding of control fluid inlet and liquid outlet.

As shown in Figure 3, when extracting liquid, the periphery valve 251 of non-return flap is opened, and center valve 252 is in closing condition, and annular recesses 26 becomes fluid inlet, arranges filtering membrane 27 and can filter the liquid entering syringe on annular recesses 26. As a kind of preferred structure, filtering membrane 27 is welded in annular recesses 26, has cavity 29 between filtering membrane 27 and non-return flap, and the filter residue of filtration can be stayed in cavity 29.

As shown in Figure 4, during liquid medicine injection, the center valve 252 of non-return flap is opened, and periphery valve 251 cuts out, the hollow structure 241 of fixing part becomes liquid outlet channel, and the liquid feeding end 2411 at hollow structure arranges filtering membrane 28, and outlet end 2412 controls liquid by the center valve 252 of non-return flap and flows out.

The utility model mainly utilizes the pressure change of the syringe cavity when taking out medicine and injection to realize, when taking out medicine, it is negative pressure in syringe, non-return flap is separated with upper needle stand, now periphery valve 251 is opened, and center valve 252 and fixing part 24 are in impaction state, injection canal is closed, and liquid can only flow in syringe through the passage that annular recesses 26 is formed. Upon injection, producing malleation in syringe, non-return flap 25 compresses with upper needle stand, and now periphery valve 251 cuts out, and center valve 252 is separated with fixing part 24, and injection canal is opened, and liquid can only discharge syringe from the liquid outlet channel that hollow structure 241 is formed.

Claims

1. a syringe, comprise syringe and entry needle, entry needle is arranged on the cone head of syringe, described entry needle comprises draw point, upper needle stand and lower needle stand, it is characterized in that: described draw point is arranged on the front portion of needle stand, lower needle stand is provided with filter assemblies, filter assemblies comprises non-return flap and fixing part, fixing part is connected with lower needle stand, its junction forms an annular recesses, the middle part of fixing part is hollow structure, non-return flap is arranged on fixing part, the folding of control fluid inlet and liquid outlet, the periphery valve extracting non-return flap during liquid is opened, annular recesses becomes fluid inlet, during liquid medicine injection, the center valve of non-return flap is opened, the hollow structure of fixing part becomes liquid outlet channel, the fluid inlet that formed at described annular recesses is or/and be provided with filtering membrane on the liquid outlet channel that formed of hollow structure.

2. syringe according to claim 1, it is characterised in that: described filtering membrane is welded in annular recesses, has cavity structure between filtering membrane and non-return flap.

3. syringe according to claim 1, it is characterised in that: described filtering membrane is welded on the liquid feeding end of hollow structure.