CN204500731U

CN204500731U - A kind of safety type venipuncture needle

Info

Publication number: CN204500731U
Application number: CN201520193188.6U
Authority: CN
Inventors: 张亚平
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-01
Filing date: 2015-04-01
Publication date: 2015-07-29
Anticipated expiration: 2025-04-01

Abstract

A kind of safety type venipuncture needle, is made up of jointly sheath, housing, spring, needle tubing, needle stand, flexible pipe, female Luer; Have arcuate apophyses outside needle stand hypomere, its far-end forward downward-extension forms processus coracoideus, and processus coracoideus bottom surface is parallel with needle stand hypomere bottom surface, and processus coracoideus upper limb end face has a prominent sour jujube; The basic structure of housing is a hollow pipe, and its epimere internal diameter reduces, perforate is reduced; There is the stringer groove expanded outwardly the side of hollow pipe, and the width of this groove is slightly less than the width of needle stand arcuate apophyses; In the upper and lower side lateral wall of stringer groove, one is respectively had to window; The size of windowing, slightly larger than processus coracoideus, is also greater than triggering key; During assembling, needle stand and spring are pressed into housing epimere, and processus coracoideus is goed deep in uplifting window, processus coracoideus bottom surface windowed lower wall support; After using; pressing triggers key can remove the restriction of uplifting window lower wall to processus coracoideus bottom surface, and needle stand drives needle tubing to enter in hollow pipe under the effect of spring-return power, and is limited by the upper and lower wall of dropping window; keep needle tubing to be continued shielding, reach needle point by the expected design of safeguard protection.

Description

A kind of safety type venipuncture needle

Technical field

This utility model relates to a kind of medical apparatus and instruments, is a kind ofly specifically used for vein blood vessel (also can be the chamber for organizing) interior collection of specimens, automatic retracting type puncture needle to vein blood vessel infuse medical fluid, venous blood collection and venous transfusion process.

Background technology

People, when disease preventing and treating, usually through venipuncture, gather material in vein blood vessel, analytical control obtain Human Physiology or pathological state; Also usually through venipuncture, medicinal liquid be infused into vein blood vessel and arrive whole body, playing, compensate, substituting and therapeutical effect; In above diagnosis and treatment process, need a kind of venipuncture needle of hollow, realize getting involved the damage that has of human vein blood vessel, set up external to endovascular occasional passage.

At present, the various venipuncture needles (transfusion needle, blood transfusion needle, blood taking needle, live tissue puncturing check pin, remaining needle) of domestic and international use can both meet above-mentioned requirements, but also all there is wretched insufficiency and defect: current venipuncture needle both domestic and external, after using in above environment, venipuncture needle needle point is exposed outside; The needle point of contact patient blood, often can cause needle stick injury to medical personnel and waste treatment personnel, causes infection and the propagation of blood borne disease.

The venoclysis needle of China's Clinical practice, structure is simple, and substantially do not possess safety guard, it is made up of needle tip shield, needle stand, venipuncture needle, flexible pipe; That medical personnel are by the major appliances of needle stick injury.According to China's medical statistics, scholarly journal is reported, clinical care practitioner up to more than 80%, is endangered extremely serious by the incidence rate of needle stick injury.

Existing multiple technologies scheme arranges protective casing in the appearance of puncture needle, artificially covers needle point; But be very inconvenience, and there is the possibility of accidentally injuring.Separately there is technical scheme to be utilize the recoil of spring power after compressing, needle stand and needle point are sprung in protective casing.But because complex structure, parts are a lot, and can not automated production, cause cost very high, be difficult to popularization and application.

In sum, clinic diagnosis in the urgent need to one, can shield puncture needle, effectively avoid needle stick injury in above-mentioned infuse medical fluid, blood transfusion, blood sampling, collection of body fluids process; Again there is features simple structure simultaneously, can the production automation be realized, safety vein puncture needle with low cost; Just at present, both at home and abroad still without any can with simple economy, practical safety, the technical scheme that automatic assembling produces can be realized be disclosed.

Summary of the invention

This utility model be for above-mentioned at vein, organize chamber to puncture, realize transfusion, blood transfusion, deficiency existing for collect specimen process and the solution that proposes.There is feature that is safe, reliable, easy, practical, inexpensive, that can realize the production automation, simplify clinical manipulation program, needle stick injury of increasing work efficiency, eliminate; Specifically, it is a kind of automatic retracting type safety vein puncture needle had needle tip shielding, can be used for the process of the collection to venous blood, infuse medical fluid, blood transfusion, tissue specimen collection and treatment.

This utility model is realized by following scheme: a kind of safety type venipuncture needle is made up of sheath, housing, needle stand, spring, needle tubing, flexible pipe, female Luer; It is characterized in that: needle tubing and flexible pipe are bonded in the upper and lower stomidium of needle stand respectively; Needle stand is assemblied on housing, and spring is compressed in the space that needle stand and housing formed; Sheath covers the hollow pipe epimere appearance of housing; The basic structure of housing is a hollow pipe, expands outwardly from the sidewall side of hollow pipe, forms a stringer groove; The flap outwards extended is had in the side of the stringer groove of hollow pipe.

On the top of flap, have one difformly to crack, the part on flap and wing plate is partitioned into a cantilever in free shape, the front end of cantilever reduces, and becomes triggering key, and the end of triggering key is corresponding with uplifting window; The height and the width triggering key end are slightly less than upper and lower two height H of windowing and width N.

On the upper and lower end lateral wall of stringer groove, be respectively arranged with uplifting window and dropping window; Two width N windowed are all consistent with height H; Two window between distance L be greater than puncture needle tubing from tip to the distance K of the processus coracoideus bottom surface of the transverse process far-end of needle stand side; A downward anticreep is had to dash forward sour jujube at the upper wall of dropping window.

Needle stand is tubular structure, in needle stand hypomere side along the plane of axis upwards (or downwards) be provided with and one tilt upward the arc transverse process of (or downwards), the far-end of this transverse process has raised in outward lean, be called processus coracoideus, the bottom surface of this processus coracoideus is parallel with bottom surface, needle stand lower end; The upper limb of processus coracoideus has a prominent sour jujube, and prominent sour jujube that can be downward with dropping window upper wall mutually fastens and mutually restricts; The external diameter of needle stand epimere is less than the internal diameter of spring, the internal orifice dimension that the hollow pipe epimere being also less than housing reduces; The external diameter of needle stand hypomere is less than the internal diameter of hollow pipe hypomere.

The internal diameter of the hollow pipe on described housing is greater than the external diameter of needle stand hypomere; The internal diameter of hollow pipe epimere reduces, and its diameter is greater than the external diameter of spring; The internal diameter constriction of hollow pipe epimere opening part, its internal diameter is less than the external diameter of spring, but is greater than the external diameter of needle stand epimere.Be positioned at the width of stringer groove of the hollow pipe sidewall side of housing and the internal diameter sum X of hollow pipe and be less than needle stand hypomere external diameter and the arcuate apophyses far-end processus coracoideus distance sum W to needle stand hypomere periphery.Have a flap outwards extended in the stringer groove side of hollow pipe, the periphery of flap has wing plate to hold; Have several ribs in the arranged outside of wing plate, they form gripping handle jointly, above handle (concordant with the junction of upper and lower section of needle stand), are provided with identification plate, for automated production.

Pressing handle, power passes to triggering key by cantilever, and active force puts on the processus coracoideus of the transverse process far-end of needle stand hypomere, it is made to depart from the support of stringer trenched side-wall uplifting window bottom surface, needle stand is completely released, and under spring action, needle stand and puncture needle launch rapidly and enter hollow pipe inner chamber; When processus coracoideus in needle stand side is again by the dropping window of stringer groove, the outer bullet of arc transverse process, makes processus coracoideus extend in dropping window and is supported by lower wall; Upper wall due to dropping window is provided with downward prominent sour jujube, relatively with processus coracoideus upper limb prominent sour jujube upwards can fasten, forms spacing restriction, needle stand cannot be moved again downward or upward, pull out needle shield at hollow pipe inner chamber.

During assembling product, needle stand is inserted by hollow pipe lower end, transverse process enters in stringer groove, clamping device, by processus coracoideus adduction, after it is by the dropping window of stringer groove, discharges clamping device, to needle stand applying power upwards, needle stand and transverse process just can be made automatically to enter in uplifting window along hollow pipe and stringer groove, because arc transverse process has elasticity, make processus coracoideus be supported restriction by the lower wall of uplifting window; Keep the stable of puncture needle; On triggering, the interaction of the processus coracoideus of arc transverse process on needle stand and the dropping window of stringer groove can be relied on, needle stand be entered automatically and in dropping window, also keeps stable; The effect reaching elimination needle stick injury, reduce the propagation of blood borne disease, protect medical personnel and waste treatment personnel.

During use, operate: take off front end sheath with conventional venipuncture method, row vein punctures, and after success, implements venoclysis medicinal liquid, venous blood collection, blood transfusion, biological fluid extracting and treatment and operates.

In the technical solution of the utility model by the structural grouping of several functions in a housing parts, be beneficial to and reduce the manufacture of product and assembly cost.So succinct technical scheme has broken through existing technical scheme, has novelty and practicality.

Noun is had a guide look of

0: sheath 3: spring 4: needle tubing 5: flexible pipe 6: female Luer

1: housing 10: hollow pipe 101: aperture, hollow pipe upper end 11: stringer groove

12: identify plate 13: flap 131: handle 14: trigger key

15: handle prolapse 16: damping inclined-plane 17: uplifting window 18: dropping window

19: anticreep is dashed forward sour jujube

2: needle stand 21: needle stand epimere 22: needle stand epimere endoporus 23: arcuate apophyses

230: processus coracoideus 231: processus coracoideus bottom surface 232: processus coracoideus upper limb is dashed forward sour jujube

Accompanying drawing explanation

Fig. 1 is decomposition texture schematic diagram of the present utility model

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

Fig. 3 is the generalized section of housing of the present utility model along A-A

Fig. 4 is the semi-section schematic diagram of this utility model housing

Fig. 5 is the semi-section schematic diagram before this utility model uses

Fig. 6 is after this utility model uses, puncture needle tubing is retracted into semi-section schematic diagram in the hollow pipe of housing

Detailed description of the invention

Fig. 1 is decomposition texture schematic diagram of the present utility model, as seen from the figure: this utility model is made up of jointly sheath 0, housing 1, needle stand 2, spring 3, needle tubing 4, flexible pipe 5, female Luer 6; Needle tubing 4 and flexible pipe 5 are bonded in two stomidiums up and down of needle stand 2; Female Luer 6 is connected with the far-end of flexible pipe 5; Needle stand 2 is assemblied on housing 1, and spring 3 is sleeved on needle stand epimere and is compressed in space that needle stand 2 and housing 1 formed; Sheath 0 is the blind pipe of a hollow, is sleeved on housing.

See Fig. 2, needle stand 2 is tubular structure; The external diameter of needle stand epimere 21 is less than the internal diameter of spring 3; The appearance of needle stand 2 epimere 21 can pocketed springs 3; The external diameter of needle stand hypomere is slightly less than the internal diameter of housing hollow pipe; In the side of needle stand 2 hypomere of the planes overlapping with needle stand 2 axis, be provided with the arcuate apophyses 23 of upwards (or downwards) abduction, this projection 23 has certain compression deformation ability and restores elasticity, this projection 23 and needle stand 2 axis upwards (or downward) at an angle tilt, one is had in projection downward forward at its far-end, be called processus coracoideus 230, the bottom surface 231 of processus coracoideus is parallel with bottom surface, needle stand lower end; The upper limb end face of this processus coracoideus has a upwards prominent sour jujube, is called processus coracoideus upper limb and dashes forward sour jujube 232.

Fig. 3 is the partial sectional view along A-A line of housing of the present utility model, Fig. 4 be housing of the present utility model partly cut open schematic diagram, two figure are known thus: the basic structure of housing 1 is a hollow pipe 10, and the epimere internal diameter of hollow pipe reduces, and its internal diameter is greater than the external diameter of spring 3; The aperture 101 of hollow pipe upper end perforate is corresponding to be reduced, and aperture is less than the external diameter of spring 3; Composition graphs 3, Fig. 4, in hollow pipe side, tube wall expands outwardly, form a flat stringer groove 11, and the width of this groove 11 and the diameter of bore sum X of hollow pipe are less than the external diameter of needle stand hypomere and the processus coracoideus outer rim of the transverse process distance sum W to needle stand outer wall; The degree of depth of stringer groove 11 equals the length of hollow pipe hypomere; The height H of stringer groove 11 is slightly larger than the thickness of arcuate apophyses 23; In stringer groove 11 upper end near identifying that there is a uplifting window 17 lateral wall at plate 12 place; In the lateral wall of the bottom of stringer groove 11, be provided with a dropping window 18; Upper and lower two width N windowed are all consistent with height H; The upper and lower width N windowed is slightly larger than the height (distance of the sour jujube 232 that dashes forward to processus coracoideus upper limb end face from processus coracoideus bottom surface 231) of the arcuate apophyses far-end processus coracoideus 230 of needle stand hypomere; Inside the upper wall of dropping window 18, have the anticreep projection 19 that downward, this projection 19 can be formed to fasten with the prominent sour jujube 232 of the processus coracoideus upper edge surfaces of arcuate apophyses 23 far-end of needle stand 2 hypomere and mutually restrict;

In the lateral wall of stringer groove 11, have the flap 13 outwards extended, the periphery of flap has wing plate to hold, and the outer rim of wing plate is provided with multiple semicircle dendron, and they are composition puncture handle 131 jointly; There is an irregular shape to crack 21 along handle 131 and the intersection of identification plate 12, a part for flap is cut out a cantilever in free shape; The far-end of this cantilever reduces, and becomes and triggers key 14, and the end of triggering key 14 is corresponding with uplifting window 17; The width of triggering key and thickness are slightly less than width N and the height H of uplifting window 17, make triggering key 14 can enter in uplifting window 17;

The internal diameter of hollow pipe 10 is slightly larger than the external diameter of needle stand 2 hypomere; The internal diameter of hollow pipe epimere is slightly larger than the external diameter of spring 3; Hollow pipe epimere perforate 101 is reduced, and aperture is less than spring 3 external diameter, but is greater than the external diameter of needle stand epimere 21;

Fig. 5 is integrally-built generalized section of the present utility model, as seen from the figure, composition graphs 1, puncture needle tubing 4 adheres in needle stand 4 epimere endoporus 22, and flexible pipe 5 coheres in the endoporus of needle stand lower end; The far-end of flexible pipe 5 coheres female Luer 6, is that liquid input spins mouth; The epimere that the processus coracoideus 230 of arcuate apophyses 23 far-end of needle stand 2 stretches into stringer groove 11 is windowed in 17, and conflict with the lower wall of uplifting window 17 and support in processus coracoideus bottom surface 231, needle stand 2 is fixed on housing epimere; Spring 3 is sleeved on the appearance of needle stand 2, is compressed in the two space formed by the perforate 101 that needle stand 2 epimere 21 and housing 1 epimere reduce; The appearance of puncture needle tubing 4 is coated with sheath 0, is not damaged to protect needle point; During use, gripping handle 131, routine carries out venipuncture.

Fig. 6 is after a procedure of the present utility model, and puncture needle tubing is retracted into the semi-section schematic diagram in the hollow pipe of housing; As seen from the figure, at the end of use, force in handle, along cantilever can power transmission with trigger key 14, trigger the processus coracoideus surface of key compressing needle stand arcuate apophyses 23 far-end; The handle prolapse 15 formed due to inclined-plane, handle front end can contact with each other along with pressing down of handle with the damping inclined-plane 16 of identification plate far-end, make to there is certain resistance during pressing handle, malfunction in situation that this resistance can prevent in transit and the general carrying casing deposited in process collides triggers, and improves the reliability of product.When needs excite protector, need the strength part that definite, force handle, this power can make the damping inclined-plane of the outer prolongation of identification plate 12 outwards be out of shape reach, make handle 131 can continue to trigger key 14 to lower compression, the processus coracoideus 230 of needle stand 2 arcuate apophyses far-end is pressed in hollow pipe stringer groove 11, makes processus coracoideus bottom surface 231 depart from the support of stringer groove uplifting window 17 lower wall; Now, needle stand 2 loses support, under the restitutive force effect of spring 3, needle stand 2 drives puncture needle tubing 4 to launch rapidly to housing cavity, until the far-end processus coracoideus 230 of needle stand arcuate apophyses when the hypomere dropping window 18 of stringer groove 11, due to elastic reaction, processus coracoideus can extend in dropping window 18, processus coracoideus bottom surface 231 is supported by dropping window 18 lower wall and stops moving down, and is fixed on the lower end of the hollow pipe 10 of housing; There is the anticreep sour jujube 19 that dashes forward and can be formed and fasten spacing with the needle stand arcuate apophyses far-end processus coracoideus upper limb sour jujube 232 that dashes forward in the upper wall due to dropping window 18, and needle stand can not be moved up again, thus needle stand is fixed on the hollow pipe inner chamber of housing.Needle point is thoroughly shielded can not again be exposed in the hollow pipe of housing.

Puncture needle tubing is greater than from tip to the distance K of processus coracoideus 230 bottom surface 231 of needle stand arcuate apophyses far-end at two distance L windowed between 17 and 18 of stringer groove 11 upper and lower side;

Because this utility model have employed, arcuate apophyses 23 is set on needle stand 2, make it have certain elasticity, make the bottom surface 231 of the processus coracoideus 230 of this projection far-end can oppressed distortion in the stringer groove 11 of hollow pipe side, when run into window time, processus coracoideus 230 abduction under the elastic reaction of arcuate apophyses can be supported fixing at the upper and lower place of windowing in being deep into and windowing; So be convenient to the installation of Paracentesis needle holder; Be beneficial to after a procedure and needle stand is bounced back; The upper wall of dropping window 18 is provided with the anticreep corresponding with the processus coracoideus upper limb of needle stand to dash forward sour jujube 19, the two can fasten mutually, and restriction needle stand processus coracoideus enters in stringer groove again, can prevent needle point from again exposing.

Due to this utility model have employed housing 1 and hollow pipe 10 and cantilever button 14, the damping structure (handle leading edge 15, identifies that plate extends swash plate 16) of anti-error triggering, the needle stand latch-up structure (dropping window 18 upper wall projection 19 and needle stand processus coracoideus upper limb dash forward sour jujube 232 fasten) afterwards that bounce back gathers in structure integrally, simplify modular construction and quantity, needle stand 2 and spring can be made once to be pressed into housing hollow pipe inner chamber, to complete installation, location, keep; And realizing after security feature starts, needle stand automatic position bounce back and enters locking in dropping window, maintenance tip shield at the hollow pipe inner chamber of housing; Namely production and assembly operation is decreased; Be convenient to again automation equipment production and assembly produce, significantly reduce production cost.

Technical scheme described by this utility model, at those skilled in the art by being out of shape any similar distortion that can realize, all will fall into technology category of the present utility model.

Claims

1. a safety type venipuncture needle is made up of sheath (0), housing (1), needle stand (2), spring (3), needle tubing (4), a flexible pipe (5), female Luer (6); It is characterized in that: needle tubing (4) and flexible pipe (5) are bonded in the upper and lower stomidium of needle stand (2) respectively; Needle stand (2) is assemblied on housing (1), and spring (3) is compressed in the space that needle stand (2) and housing (1) formed; Sheath (0) covers hollow pipe (10) the epimere appearance of housing (1);

The basic structure of housing (1) is a hollow pipe (10), expands outwardly from the sidewall side of hollow pipe, forms a stringer groove (11); The flap (13) outwards extended is had in stringer groove (11) side of hollow pipe (10); On the top of flap (13), there are difform crack (21), a part on flap and wing plate is partitioned into a cantilever in free shape, the front end of cantilever reduces, become and trigger key (14), the end of triggering key (14) is corresponding with uplifting window (17); Trigger the height and the width of key (14) end to be slightly less than upper and lower two and to window the height H of (17,18) and width N;

On the upper and lower end lateral wall of stringer groove (11), be respectively arranged with uplifting window (17) and dropping window (18); Two width N windowed are all consistent with height H; Two window between distance L be greater than puncture needle tubing (4) distance K of processus coracoideus (230) bottom surface (231) of (2) side arc transverse process (23) far-end from tip to needle stand; A downward anticreep is had to dash forward sour jujube (19) at the upper wall of dropping window (18);

Needle stand (2) is tubular structure, in needle stand (2) hypomere side, the plane of axis is provided with the arc transverse process (23) that tilts upward (or downward), the far-end of this transverse process (23) has raised in outward lean, be called processus coracoideus (230), the bottom surface (231) of this processus coracoideus is parallel with needle stand (2) bottom surface, lower end; The upper limb end face of processus coracoideus has a prominent sour jujube (232), and the sour jujube (19) that dashes forward mutually fastens and also mutually restricts for anticreep that can be downward with dropping window (18) upper wall; The external diameter of needle stand epimere (21) is less than the internal diameter of spring (3), is also less than the internal diameter of hollow pipe (10) upper end perforate (101).

2. according to the said a kind of safety type venipuncture needle of claim 1, it is characterized in that: the internal orifice dimension of the hollow pipe (10) on housing (1) is greater than the external diameter of needle stand (2) hypomere; The internal orifice dimension of hollow pipe (10) epimere reduces, and its diameter is greater than the external diameter of spring (3); The internal diameter constriction (101) of hollow pipe (10) epimere opening part, aperture is less than the external diameter of spring (3), but is greater than the external diameter of needle stand (2) epimere (21).

3. according to the said a kind of safety type venipuncture needle of claim 1, it is characterized in that: be positioned at the width of stringer groove (11) of hollow pipe (10) the sidewall side of housing (1) and the internal diameter sum X of hollow pipe and be slightly less than needle stand (2) hypomere external diameter and arcuate apophyses (23) the far-end processus coracoideus distance sum W to needle stand hypomere periphery.

4. according to the said a kind of safety type venipuncture needle of claim 1, it is characterized in that: have a flap (13) outwards extended in stringer groove (11) side of hollow pipe (10), the periphery of flap has wing plate to hold; Have several ribs in the arranged outside of wing plate, they form gripping handle (131) jointly, above handle (concordant with the junction of upper and lower section of needle stand), are provided with and identify plate (12).