CN2652327Y

CN2652327Y - Push jet self locking type disposable safety automatic blood taking needle

Info

Publication number: CN2652327Y
Application number: CN 03278338
Authority: CN
Inventors: 施国平
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-05
Filing date: 2003-09-05
Publication date: 2004-11-03
Anticipated expiration: 2013-09-05

Abstract

A push injecting autolocking disposable safety auto blood taking needle comprises a casing, an end cover, a button, a spring and a needle core, wherein, an elastic clamp extends from the end cover in the casing. The needle core of a precompressed spring is clamped by the elastic claw. The needle core can be released by pressing the button on the end cover. The needle core can shoot downwards along the guide structure driven by the spring. The needle core cannot be recovered to the original shooting state during the retracting due to the blocking of an autolocking end face, so that possibility of reshooting is lost. Therefore, the utility model is a disposable shooting structure. The utility model, which has the advantages of simple and reasonable structure, small volume and safe and reliable operation, can meet the operating custom of manual shooting and is a new mini blood taking needle.

Description

Propel self-locking type disposable safe automatic blood-taking needle

Technical field

This utility model relates to a kind of medical blood-sampling needle device, particularly a kind of carry ejection structure propel self-locking type disposable safe automatic blood-taking needle.

Background technology

In the prior art, the form of blood taking needle is varied, but along with medical level improves, and some " mini " disposable blood taking needles that wherein possess characteristics such as good, simple in structure, the easy to operate and cost of safety is low will become a kind of trend of Future Development.This class blood taking needle generally all contains main members such as housing, nook closing member and spring, and at blood taking needle inner an ejection structure of formation and a self-locking structure each other.Therefore behind the blood taking needle primary emission, cease to be in force automatically, can not reuse, thoroughly eliminated in the past the reusable potential safety hazard of leaving on the disposable blood taking needle structure.But, real above-mentioned target, do not resemble the so simple of people's imagination yet, especially concerning " mini " blood taking needle of miniaturization, because of being subjected to the restriction of volume and cost two aspects, seek out preferably there is certain difficulty in effect on structural design.

This utility model purpose is according to primary emission, this design that ceases to be in force automatically has designed a kind of self-locking type disposable safe automatic blood-taking needle of propelling, and this blood taking needle is on the miniaturization basis, make every effort to safety and succinct, and embody the operability of product by the design that meets the staff operating habit.

Summary of the invention

For achieving the above object, the technical solution adopted in the utility model is: a kind of self-locking type disposable safe automatic blood-taking needle of propelling, comprise shell, end cap, button, spring and nook closing member, and its syndeton is:

End cap covers in the shell port, end cap is the elasticity of extension folder in the enclosure, the elasticity folder is made up of two elastic claws at least, elastic claw utilizes the grab of end to cooperate with clip position on the nook closing member nook closing member is clamped, spring action is on the direction of ejection between nook closing member afterbody and the end cap, button is located on the end cap, and its effect end passes end cap and acts on the nook closing member tail end;

Nook closing member is positioned at the ejection chamber of shell, and its sidepiece constitutes the shooting guide frame by the gathering sill on guiding rib and the outer casing inner wall;

The front end of shell is a blood sampling end face, and end face central authorities are provided with needle outlet, and the nook closing member front portion is provided with needle point, and needle point is over against needle outlet;

The rear at nook closing member clip position is provided with a self-locking end face, and this self-locking end face forms a structure that prevents horizontal reset on the nook closing member not holding to cooperate with elastic claw after the shooting, constitutes disposable shooting structure with this.

The related content and the change interpretation of technique scheme are as follows:

1, in the such scheme, described " nook closing member " is meant the member of band needle body, is made up of the part of needle body and parcel needle body at least.

2, in the such scheme, meet the operability that staff is propelled when blood taking needle is used, button can be located at end cap central authorities, the shell outer rim is provided with the flank of similar syringe, and this flank forms handgrip part with the horizontal expansion structure.Flank generally has two kinds of forms, a kind ofly a flank is set, two flank left-right symmetric respectively about being; Another kind is that annular shoulder is set.

3, in the such scheme, for health and the safety of protecting needle point, can be provided with needle handle at the nook closing member front end, this needle handle is exposed at outside the needle outlet for one section, and another section stretches into needle outlet and is enclosed within on the needle point.Needle handle is general to interconnect with nook closing member employing single injection-molded, and needle handle and nook closing member intersection are provided with the cervical region of deflation.

4, in the such scheme, can clamp nook closing member, can when blood sampling, be convenient to discharge again, can adopt following three kinds of structures in order to make the elasticity folder:

(1), inverted cone is arranged in the cross section at nook closing member clip position, corresponding elastic claw be two, three or four all can, all elastic claws are evenly arranged at circumferencial direction.

(2), be rectangle with the cross section at nook closing member clip position, its side is the inclined-plane, corresponding elastic claw is two or four, all elastic claws are in peripheral symmetric arrangement.

(3), be triangle with the cross section at nook closing member clip position, its side is the inclined-plane, corresponding elastic claw is three, all elastic claws in the periphery a corresponding side arrange.

This utility model operation principle is: before blood taking needle used, the elasticity folder blocked nook closing member by grab and chucking power, and spring is compressed, and nook closing member is in battery.Rotating needle handle during use pulls out after the cervical region fracture, clamp the handgrip part of flank with forefinger and crapulous syncope, refer to press the button with mother then, this moment, the nook closing member retaining part broke off relations, spring just promotes nook closing member and shoots downwards along guide frame, and needle point penetrates needle outlet and stabs blood sampling site.

Nook closing member guide pad in shooting course is obstructed when gathering sill slides into lower end position, and spring drives the nook closing member retraction again.Because the barrier effect of self-locking end face, nook closing member can not return to original battery, and therefore shooting back nook closing member loses the possibility of emission again, and spring is in free state, and needle point is ensconced the shooting intracavity and can not exposed from needle outlet.

Because the technique scheme utilization, this programme compared with prior art has following advantage and effect:

1, this utility model ejection structure and self-locking structure are simple and compact for structure, especially cleverly the principle formation self-locking that utilizes elastic claw unhook retraction back and the self-locking end face in the backhaul to conflict, make nook closing member can not return to original battery, thereby lose the possibility of emission again, therefore it is fairly good, safe and reliable very high to make that disposable safe guarantees.

2, this utility model design of meeting the staff operating habit makes the operability of product better.

3, therefore this utility model is shot reliable and stable owing to be provided with special shooting guide frame.

4, the forward needle handle of this utility model nook closing member is only adopted the short handle structure, and need not adopt the long handle structure.

5, this utility model volume is little, and is in light weight, and good manufacturability is produced the qualification rate height in batches, and cost is low, belongs to a kind of succinct " mini " disposable safe automatic blood-taking needle.

Description of drawings

Accompanying drawing 1 is this utility model example structure cutaway view, and this figure is the assembly structure of state before using;

Accompanying drawing 2 is this utility model example structure, and this figure is the assembly structure that uses the back state;

Accompanying drawing 3 is this utility model example structure exploded view.

In the above accompanying drawing: 1, button; 2, spring; 3, end cap; 4, elasticity folder; 5, shell; 6, nook closing member; 7, needle handle; 8, needle point; 9, the conical surface; 10, grab; 11, end face; 12, needle outlet; 13, gathering sill; 14, guiding rib.

The specific embodiment

Below in conjunction with drawings and Examples this utility model is further described:

Embodiment: shown in accompanying drawing 1～accompanying drawing 3, a kind of self-locking type disposable safe automatic blood-taking needle of propelling is made up of shell 5, end cap 3, elasticity folder 4, button 1, spring 2 and nook closing member 6.Shell 5 is a barrel-shaped member, is ejection chamber in the shell, and the shell outer rim is provided with two circle annular shoulders, and wherein the flank by the port forms handgrip part with the horizontal expansion structure.The lower end of shell 5 is provided with needle outlet 12, the upper end is an opening, end cap 3 is fixed on the upper port place by annular slot, end cap 3 is elasticity of extension folder 4 in shell 5, elasticity folder 4 also is to be fixed on the end cap 3 by annular slot, elasticity folder 4 is made up of four elastic claws, elastic claw utilizes the grab 10 of end to cooperate with clip position on the nook closing member 6 nook closing member 6 is clamped, spring 2 acts on the direction of ejection between nook closing member 6 afterbodys and the end cap 3, button 1 is located at end cap 3 central authorities, and its effect end passes the set hole of end cap 3 central authorities and acts directly on nook closing member 6 tail ends.Nook closing member 6 is positioned at the ejection chamber of shell 5, and its sidepiece is shot guide frames by guiding rib 14 and gathering sill 13 formations on shell 5 inwalls.The front end of shell 5 is a blood sampling end face 11, and needle outlet 12 is located at end face 11 central authorities, and nook closing member 6 front ends are provided with needle handle 7, and this needle handle is exposed at outside the needle outlet 12 for 7 one sections, and another section stretches into needle outlet 12 and is enclosed within on the needle point, forms a kind of safety protection structure with this.Needle handle 7 is to be interconnected by single injection-molded with nook closing member 6, and needle handle 7 and nook closing member 6 intersections are provided with the cervical region of deflation.The cross section at nook closing member 6 clip positions is an inverted cone, and four corresponding elastic claws are evenly arranged at peripheral circumferencial direction.The rear at nook closing member 6 clip positions is provided with a self-locking end face, and this self-locking end face forms a structure that prevents horizontal reset on the nook closing member 6 not holding to cooperate with elastic claw after the shooting, constitutes disposable shooting structure with this.

In the present embodiment, also can change the cross section at nook closing member 6 clip positions into rectangle, its side is the inclined-plane, and four corresponding elastic claws are in nook closing member 6 peripheral symmetric arrangement.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to this utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of self-locking type disposable safe automatic blood-taking needle of propelling, it is characterized in that: comprise shell [5], end cap [3], button [1], spring [2] and nook closing member [6], its syndeton is:

End cap [3] covers in shell [5] port, end cap [3] is elasticity of extension folder [4] in shell [5], elasticity folder [4] is made up of two elastic claws at least, elastic claw utilizes the grab [10] of end to cooperate with clip position on the nook closing member [6] nook closing member [6] is clamped, spring [2] acts on the direction of ejection between nook closing member [6] afterbody and the end cap [3], button [1] is located on the end cap [3], and its effect end passes end cap [3] and acts on nook closing member [6] tail end;

Nook closing member [6] is positioned at the ejection chamber of shell [5], and its sidepiece is shot guide frame by guiding rib [14] and gathering sill [13] formation on shell [5] inwall;

The front end of shell [5] is a blood sampling end face [11], and end face [11] central authorities are provided with needle outlet [12], and nook closing member [6] front portion is provided with needle point, and needle point is over against needle outlet [12];

The rear at nook closing member [6] clip position is provided with a self-locking end face, and this self-locking end face is not held to cooperate with elastic claw after shooting and formed one and prevent that nook closing member [6] from going up the structure of horizontal reset, constitutes disposable shooting structure with this.

2, blood taking needle according to claim 1 is characterized in that: described button [1] is located at end cap [3] central authorities, and shell [5] outer rim is provided with the flank of similar syringe, and this flank forms handgrip part with the horizontal expansion structure.

3, blood taking needle according to claim 1 is characterized in that: described nook closing member [6] front end is provided with needle handle [7], and this needle handle is exposed at outside the needle outlet [12] for [7] one sections, and another section stretches into needle outlet [12] and is enclosed within on the needle point, forms a kind of safety protection structure with this.

4, blood taking needle according to claim 3 is characterized in that: described needle handle [7] can be interconnected by single injection-molded with nook closing member [6], and needle handle [7] and nook closing member [6] intersection are provided with the cervical region of deflation.

5, blood taking needle according to claim 1 is characterized in that: the cross section at described nook closing member [6] clip position is an inverted cone, and corresponding elastic claw is two, three or four, and all elastic claws are evenly arranged at circumferencial direction.

6, blood taking needle according to claim 1 is characterized in that: the cross section at described nook closing member [6] clip position is a rectangle, and its side is the inclined-plane, and corresponding elastic claw is two or four, and all elastic claws are in peripheral symmetric arrangement.

7, blood taking needle according to claim 1 is characterized in that: the cross section at described nook closing member [6] clip position is a triangle, and its side is the inclined-plane, and corresponding elastic claw is three, and all elastic claws are corresponding side layout in the periphery.