CN203609428U

CN203609428U - Disposable hemostix

Info

Publication number: CN203609428U
Application number: CN201320729068.4U
Authority: CN
Inventors: 柳新荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2014-05-28
Anticipated expiration: 2023-11-15

Abstract

The utility model discloses a disposable hemostix, which comprises a shell, wherein a clamping piece is fixedly arranged in the shell, a blood taking needle is clamped on the clamping piece, a pressure spring is clamped between the clamping piece and the blood taking needle, the front side of the clamping piece is provided with a pushing device which can act on the clamping piece to open a clamping opening in the clamping piece, one part of the pushing device is exposed outside the shell, an ejecting cavity which is used for the ejecting operation of the blood taking needle and a needle withdrawing hole which is communicated with the ejecting cavity are arranged in the pushing device, a needle-core sleeve which is sleeved outside the needle core of the blood taking needle is arranged on the needle core of the blood taking needle, and the needle-core sleeve and a needle seat are fixedly connected through a material easily broken by twisting. According to the disposable hemostix disclosed by the utility model, the occurrence of common situations that the blood taking needle is clamped and the ejection of the blood taking needle is blocked during key-slot matching are avoided, and meanwhile, the problems that taken blood is easily polluted and the needle core of the blood taking needle only can be used after cleaning, disinfection and sterile processing due to the ineffective protection of the blood taking needle in the prior art are also solved.

Description

Disposable blood taking device

Technical field

This utility model relates to medical blood taking instrument field, is specifically related to a kind of disposable blood taking device.

Background technology

When blood test, often need to carry out blood sample collection program; Carry out at present blood sampling and often adopt blood collection needle pin or disposable blood taking needle.The aspects such as disposable blood taking needle is preventing patient or crowd's mutual infection, easy to use have larger advantage, comparatively general in clinical use at present, especially to special population as the sampling of taking a blood sample such as child.When automatic blood-taking needle uses, only blood taking needle need be pressed close to the skin of user and take a blood sample, can carry out one-handed performance.Adopt the automatic blood-taking needle 1.5min that taken a blood sample than blood collection needle method blood sampling time shorten in average, improved work efficiency, alleviated patient's psychological burden.And automatic blood-taking needle is small and exquisite, convenient, be easy to carry about with one, the convenient blood sampling examination that carries out under various environment.

Due to these advantages of automatic blood-taking needle, in actual life, the employing of automatic blood-taking needle is more and more extensive.The form of disposable blood taking needle is varied at present, this class blood taking needle is generally formed by housing, blood taking needle, stage clip and guide frame, general stage clip is arranged on blood taking needle rear end, described blood taking needle generally adopts position limiting structure clamping to make blood taking needle rear end stage clip keep compressive state and accumulation of energy, so just form the ejection mechanism of blood taking needle, guiding mechanism generally arranges gathering sill by housing inner side and guide pad cooperation is set on needle core of blood taking needle and forms shooting guide frame.

In prior art, Chinese patent ZL03221437.5 discloses a kind of self-locking type disposable safe automatic blood-taking needle on June 9th, 2004, comprise shell, end cap, nook closing member, stage clip, push away hair device and block, on end cap, in shell, have a pair of elastic claw, this elastic claw utilize grab and chucking power by nook closing member both sides pick up the ears block; Push away hair device and adopt on the one hand inclined-plane to meet two elastic claws head-on to force it to break off relations, coordinates formation to shoot guide frame on the other hand by the gathering sill of long foot inner side with the feather key on nook closing member, this guide frame and elastic clip structure are decussation layout; Setly on nook closing member after shooting, form the structure that prevent nook closing member on horizontal reset with grab bottom from locking face.But, in use find, due to being equipped with of feather key and gathering sill, make blood taking needle in ejection travel, can be subject to the impact of frictional force, effect is launched in impact; In addition, when the direction of ejection of blood taking needle is not consistent with the direction of gathering sill and feather key in the time that rear end stage clip discharges, can cause that blood taking needle is stuck can not be used, even more serious consequence likely causes the injury to person of blood collecting; In addition, the block adopting in this patent and needle core of blood taking needle carry out nature fastening, and the joint portion of itself and nook closing member is not sealed and matched, and cause this blood taking needle before blood sampling operation to be easily contaminated by bacterial, and affect the result of blood sampling examination.

In addition, because the employing of automatic blood-taking needle in actual life is more and more, use while particularly diabetics being carried out to blood sugar monitoring, measure blood sugar level in blood samples of patients (BGL), the result that records BGL contributes to find its rule, to determine that insulin dose and the different phase for comings and goings and growth make adjusting.The detection of blood SA need to puncture the skin tips such as finger tip and get a little blood.Generally need a Finger sting apparatus with blood taking needle.In the time using, puncture blood capillary with blood taking needle, after blood flows out naturally, for subsequent use with the blood of micropipet absorption aequum.

In prior art, disclosed Chinese patent ZL01244520.7 discloses a kind of cap-covering type safety automatic blood-taking needle on March 26th, 2002; comprise housing, blood taking needle and stage clip; in housing, be provided with ejection chamber; blood taking needle and stage clip are placed in ejection chamber and on direction of ejection, connect into elastic sliding structure; housing is provided with the needle outlet consistent with direction of ejection; blood taking needle and case side between in stage clip compressed path, be provided with card and penetrate structure; the head of blood taking needle is provided with protection sleeve; one end of protection sleeve is socketed in blood taking needle head, and the other end stretches out from needle outlet.When this invention is taken a blood sample, blood vessel local compression blood sampling effect is undesirable, and in this invention, blood taking needle splits with protection sleeve and blood taking needle, when use, by pulling out protection sleeve, just can effectively take a blood sample.

In addition, protect because blood taking needle adopts protection sleeve, needle core of blood taking needle, in air ambient, can make needle core of blood taking needle be infected with more antibacterial, when blood sampling, brings infection to patient, even has influence on blood glucose, ketoboidies value.As before taking a blood sample, blood sampling nook closing member is cleaned or disinfection, can greatly increase medical personnel's workload, in actual life, also bring inconvenience.And a lot of automatic blood-taking needles is disposable, its nook closing member position is hidden in automatic blood sampling needle construction, is difficult to nook closing member to do sterilization comparatively thoroughly, guarantees the sterile working of nook closing member.

Meanwhile, due to the diversity of individual human, the reason such as skin thickness is different, even for a people, blood need to gather from the different parts of human body, therefore needs to regulate continually blood taking needle to thrust the degree of depth of skin.If the thrusting the degree of depth and cannot regulate all the time of blood taking needle, will cause thrusting the degree of depth not or thrust too deeply and causing damage to person of blood collecting of pin.Some blood collecting pens can regulate and thrust skin depth, but adjusting portion separation structure complexity, part is many, processing installation process complexity, and manufacturing cost is higher.

The present invention comes therefrom.

Summary of the invention

This utility model object is: for the problems referred to above; a kind of disposable blood taking device is provided; to solve hemostix guiding mechanism in prior art, unreasonable blood taking needle can not take a blood sample or the take a blood sample problem of poor effect that causes is set; also solve in prior art that the ineffective blood that causes taking a blood sample of blood taking needle protection subjects to pollute, needle core of blood taking needle need to carry out the problem that could use after cleaning-sterilizing aseptic process, also solved the technical problem that the degree of depth cannot regulate of thrusting of blood taking needle in prior art simultaneously.

The technical solution of the utility model is: described disposable blood taking device, comprise housing, the through hole connecting before and after having in this housing, the rear end of described housing is fixed with the holder stretching in described through hole, on described holder, there is clamp port, and in this clamp port, clamp the blood taking needle stretching out before oriented; Described blood taking needle comprises needle stand and is fixed on the nook closing member of this needle stand front end, is folded with to blood taking needle and applies the stage clip of elastic force forward between described blood taking needle and holder; In the through hole of described housing, be also provided with and described clamp port can be opened to allow the hair device that pushes away that blood taking needle discharges from clamp port, this front end that pushes away hair device stretches out hull outside;

It is characterized in that: described in push away hair device front end be connected with that one that stretch out forward and front and back position is adjustable goes out syringe, push away hair device and be shaped with the ejection chamber for blood taking needle ejection operation with the inside that goes out syringe, the front end that goes out syringe is provided with the needle outlet being connected with described ejection chamber, come in and go out for needle core of blood taking needle; Described nook closing member is provided with and is enclosed within its outer nook closing member sleeve, between this nook closing member sleeve and needle stand, is fixedly connected with by easily twisting off material, and the front end of nook closing member sleeve is connected with the drive block that twists off stretching out outside housing.

The described front end that pushes away hair device is shaped with external screw thread, described in go out syringe rear end be shaped with female thread, described in push away hair device and go out between syringe and be connected by described internal and external threads.

The described externally threaded pitch of hair device front end that pushes away is 1mm.

Describedly go out to be shaped with the friction rib of being convenient to it to be rotated on the outer wall of syringe.

Described holder comprises firm banking, and the front end of this firm banking is fixedly installed two elastic clips that stretch out forward, the described clamp port of the common formation of these two elastic clips; The needle stand of described blood taking needle is between described two elastic clips, and described stage clip is folded between needle stand and firm banking and to needle stand and applies elastic force forward; The front end of described two elastic clips is provided with to projecting inward spacing lug, and described needle stand is provided with limited block, and described spacing lug is against described limited block front side to stop needle stand to skid off forward outside clamp port under the elastic force effect of stage clip.

The rear end of described two elastic clips is all shaped with outwardly buckle, on the through hole hole wall of described housing, is shaped with the lock dog matching with described buckle, between described holder and described housing, is fixed by described buckle and lock dog.

Described needle stand is provided with the guide pad that is positioned at described limited block front side, and described guide pad and described ejection chamber match to locate the direction of ejection of described blood taking needle.

Through hole in described housing is circular hole.

The utility model has the advantages that:

1, this utility model this disposable blood taking device push away hair device front end by internal and external threads connected front and back position adjustable go out syringe, this goes out turn syringe and can change the catapulting distance of blood taking needle, and then changes the degree of depth of thrusting of blood taking needle.

2, feather key and gathering sill with matching are not set as blood taking needle of the prior art on the blood taking needle of this disposable blood taking device of this utility model, while having avoided keyway to coordinate, the stuck and blood taking needle of common blood taking needle launches the generation of situations such as being obstructed.In the design, the structure of blood taking needle adapts with the ejection chamber pushing away in hair device, makes ejection chamber and blood taking needle matched in clearance, in guaranteeing that blood taking needle launches blood sampling operation, makes it in ejection travel, reduce the impact of periphery factor.

3, this disposable blood taking device of this utility model arranges stage clip between the fixed base frame of holder and blood taking needle, and when use, blood taking needle is because the release of accumulation of energy stage clip is launched out needle outlet and punctured blood sampling site; In the time that stage clip is elongated to the longest position, due to the factor of stage clip elastic return, blood taking needle needle stand moves forward and departs from clamp port, stop after blood taking needle and move and again enter clamp port thereby the spacing fin on elastic clip front end inclined-plane is arranged in needle stand rear side, effectively prevented the secondary utilization of this hemostix.

4, on the blood taking needle needle stand of this disposable blood taking device of this utility model, guide pad is set, unlike the prior art this guide pad only with ejection chamber matched in clearance, chamfered is carried out in the junction that even guide pad coordinates with ejection chamber, reduce frictional force between guide pad and ejection chamber, make again it keep good guide effect.The locking hemostix that is clasped on housing upper locking piece and elastic clip, makes it be assembled into overall structure; Push away hair device and stretch out forward the outer and end of housing and set out pin hole, when user is used, can drive comparatively easily after pushing away hair device and move.

5, this disposable blood taking device of this utility model is by sheathed nook closing member sleeve on nook closing member, nook closing member sleeve is fixedly connected with blood taking needle needle stand by easily twisting off material, thereby guaranteed blood taking needle before use, use time nook closing member keep gnotobasis, prevent the germ contamination before blood sampling, reduced detection error.

6, the blood taking needle of this disposable blood taking device of this utility model and nook closing member sleeve are fixed as one, and easily twisting twist off drive block and nook closing member sleeve is Split type structure.Employing Split type structure conveniently carries out the industrial processes of blood taking needle, reduces the fussy degree of follow-up assembly working.And that one end that this nook closing member sleeve socket part is connected with connecting portion is airtight, the other end is fixedly connected with blood taking needle pedestal, reduces the probability of environmental pollution nook closing member.

Accompanying drawing explanation

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

Fig. 1 is the structural representation of this utility model embodiment disposable blood taking device;

Fig. 2 is the exploded view of this utility model embodiment disposable blood taking device;

Fig. 3 be this utility model embodiment disposable blood taking device middle shell axially make figure;

Fig. 4 is the structural representation that pushes away hair device in this utility model embodiment disposable blood taking device and go out syringe while being assembled together;

Fig. 5 is the front view that pushes away hair device in this utility model embodiment disposable blood taking device;

Fig. 6 is the upward view of Fig. 5;

Fig. 7 is the structural representation that goes out syringe in this utility model embodiment disposable blood taking device.

Wherein: 1-housing, 11-lock dog, 12-through hole;

2-holder, 21-firm banking, 22-elasticity jig arm, 23-clamp port, the spacing lug of 24-, 25-buckle, 26-inclined-plane, the spacing fin of 27-;

3-blood taking needle, 31-needle stand, 32-nook closing member, 33-limited block, 34-guide pad;

4-stage clip;

5-pushes away hair device, 51-external screw thread, 52-clapboard, 53-connecting plate;

6-nook closing member sleeve, 61-socket part, 62-connecting portion, 63-fixture block;

7-twists off drive block, and 71-connects pullover, and 72-manages portion, 73-hole clipping.

8-goes out syringe, 81-needle outlet,

9-ejection chamber.

The specific embodiment

As depicted in figs. 1 and 2, this disposable blood taking device that the present embodiment provides, comprises the housing 1 of a drum, the manhole 12 connecting before and after having in housing 1.The rear end of described housing 1 is fixed with holder 2, and the front portion of this holder 2 is stretched in the through hole of housing 1.On holder 2, be provided with and in clamp port 23 and this clamp port 23, clamp the blood taking needle 3 stretching out before oriented.It is outer that clamp port 23 is stretched out at the tip that described blood taking needle 3 comprises needle stand 31 and is fixed on nook closing member 32(nook closing member 32 front portions of this needle stand front end), and being folded with stage clip 4 between blood taking needle 3 and holder 2, this stage clip 4 applies elastic force forward (thereby holder 2 clamp blood taking needle 3 make stage clip between the two in pressurized energy accumulating state) to blood taking needle 3.In the through hole of described housing 1, be also equipped with and described clamp port 23 can be opened to allow that blood taking needle 3 discharges from clamp port pushes away hair device 5, this front end that pushes away hair device 5 stretches out housing 1 outside.

The key improvements of the present embodiment is: as Fig. 1 and Fig. 2, the described front end that pushes away hair device 5 be connected with one stretch out forward go out syringe 8, and this front and back position that goes out syringe 8 is adjustable, push away hair device 5 and be shaped with the ejection chamber 9 for blood taking needle 3 ejection operations with the inside that goes out syringe 8, the front end that goes out syringe 8 is provided with and is connected with described ejection chamber 9, the needle outlet 81(coming in and going out for needle core of blood taking needle 32 is as Fig. 5), the size of this needle outlet 81 is less than the size of needle stand 31, thereby needle stand 31 can be limited in to needle outlet 81 rear sides and stop whole blood taking needle to eject needle outlet completely and injure person of blood collecting outward.Adopt after this structure, user just can change the distance between blood taking needle 3 and needle outlet 81 by adjusting the front and back position of syringe 8, has also changed the catapulting distance of blood taking needle 3, thus the degree of depth that regulates nook closing member to thrust skin.

Above-mentioned go out syringe 8 and to push away concrete assembly relation between hair device 5 as follows: as shown in Figure 4 and Figure 6, the front end that pushes away hair device 5 is shaped with external screw thread 51, the inside, rear end that goes out syringe 8 is shaped with female thread (not shown in FIG.), pushes away hair device 5 and go out between syringe 8 being connected by described internal and external threads.So, only need rotate out syringe 8 just can change and the front and back position of syringe.

As shown in Figure 7, in order to allow medical worker's turn easily go out syringe 8, this example is also shaped with many friction ribs 82 on the outer wall that goes out syringe 8.

The described externally threaded pitch of hair device 5 front end that pushes away is generally 1mm the best, and this example is provided with four gear stuck points between described internal and external threads, each circle screw thread is carried out the quartering by these four gear stuck points, every will go out syringe 8 rotate 1/4th circle, the catapulting distance of blood taking needle 3 will increase/reduce 0.25mm.

Refer again to shown in Fig. 1 and Fig. 2, nook closing member 32 is provided with and is enclosed within its outer nook closing member sleeve 6, between this nook closing member sleeve 6 and needle stand 31, be fixedly connected with by easily twisting off material, thereby the tip that makes nook closing member 32 is in the confined space that nook closing member sleeve 6 and needle stand 31 form, and avoids the pollution of external environment.In order to facilitate this hemostix in use, user can be turned round nook closing member sleeve 6 easily from needle stand 31, and this example is special to be connected with to stretch out at the front end of nook closing member sleeve 6 and to twist off drive block 7 outside housing 1.

Said 'fornt', 'back' in the present embodiment, is take Fig. 1 as reference, is parallel to paper upwards for front, after being parallel to paper and being downwards.

The detailed construction of described holder 2 can be with reference to shown in Fig. 2, and it comprises a firm banking 21, and the front end of this firm banking is fixedly installed two elastic clips that stretch out forward 22, the described clamp port 23 of this two elastic clips, 22 common formation.The needle stand 31 of described blood taking needle 3 is between described two elastic clips 22, and described stage clip 4 is folded between needle stand 31 and firm banking 21 and to needle stand 31 and applies elastic force forward.The front end of two elastic clips 22 is provided with to projecting inward spacing lug 24, and described needle stand 31 is provided with limited block 33, and described spacing lug is against described limited block front side to stop needle stand 31 to skid off forward outside clamp port 23 under the elastic force effect of stage clip 4.

In the present embodiment, fixed form between described holder 2 and described housing 1 is for being fixed, specifically can be with reference to shown in Fig. 2 and Fig. 3: the rear end of described two elastic clips 22 is all shaped with outwardly buckle 25, on the through hole hole wall of described housing 1, be shaped with the lock dog 11 matching with described buckle 25, between described holder 2 and described housing 1, be fixed by described buckle 25 and lock dog.When assembling, the elastic clip 22 of holder 2 front portions is inserted in housing 1 aperture, rear end, push away before firmly, make buckle 25 on holder 2 snap in the lock dog front side of housing 1, holder 2 and housing 1 can be fixed together.

In addition, this example is also provided with the guide pad 34 that is positioned at described limited block 33 front sides on described needle stand 31, described guide pad 34 and described ejection chamber 9 match to locate direction of ejection (guide pad 34 and the little matched in clearance of ejection chamber 9 of described blood taking needle 3, can relative sliding between the two), thereby with the generation of the phenomenon of avoiding the direction of motion in the time launching of blood taking needle 3 to depart from causing taking a blood sample.And chamfered has also been carried out in the junction that this example coordinates with ejection chamber 9 at guide pad 34, has both reduced the frictional force between guide pad and ejection chamber, make again it keep good guide effect.

Shown in Fig. 2, the front end of described elastic clip 22 is shaped with inclined-plane 26.The described detailed construction that pushes away hair device 5 is as shown in Figure 2, Figure 5 and Figure 6: it comprise the two clapboard 52(clapboards 52 that match with described inclined-plane 26 have with housing in the curved wall that fits of manhole, as Fig. 5) and be connected in two connecting plates 53 between these two clapboards, described two clapboards 52 and the common part that forms described ejection chamber 9 of two connecting plates 53.Pushing away hair device 5 can be in the interior slip of housing 1, but owing to being subject to spacing preiection (not shown in FIG.) effect of housing 1 front end aperture place setting, push away hair device 5 and can not entirety skid off forward housing 1 outside (size of fore-end that pushes away hair device is less, only this part to stretch out housing outer) completely, as Fig. 1.And on the inclined-plane 26 of described elastic clip 22 front ends, be also shaped with the spacing fin 27 perpendicular to blood taking needle direction of ejection, as Fig. 3.

In the present embodiment, the detailed construction of described nook closing member sleeve 6 as shown in Figure 5, it comprise the socket part 61 that is enclosed within outside nook closing member 32 and with the connecting portion 62 that twists off drive block 7 and be fixedly connected with.Described socket part 61 is hollow circular tube structure, and its one end and described connecting portion 62 are connected as a single entity, and the other end and blood taking needle needle stand 31 easily twist off by described that material is airtight is fixedly connected with (and integral), and the described material that easily twists off is PE material.Blood taking needle 3 is made integral structure with nook closing member sleeve 6 in the time producing, thereby has guaranteed that this disposable blood taking device had just suffered in gnotobasis all the time before assembling.

In the present embodiment, nook closing member sleeve 6 and twist off concrete connected mode between drive block 7 can be with reference to shown in Fig. 4 and Fig. 5: connecting portion 6 is provided with fixture block 63; Twist off drive block 7 one end and arrange and connect pulloverly 71, portion 72 is managed in other end setting, connects pullover 71 and is provided with hole clipping 73.Described connecting portion 62 inserts in described connection pullover 71, and in hole clipping 73 on fixture block 63 Snap joints pullover 71 on connecting portion 62, thus by nook closing member sleeve 6 with twist off drive block 7 and be fixed together.

Now in conjunction with Fig. 1; the operation principle of this disposable blood taking device of the present embodiment is described below: when this disposable blood taking device is during in original state; nook closing member sleeve 6 is enclosed within outside needle core of blood taking needle 32 and is connected to one by easily twisting off material with blood taking needle needle stand 31; thereby protection nook closing member 32 is not by outside contamination; and the effect with elastic clip 22 upper limit lugs 24 by limited block 33, the stage clip 4 at blood taking needle 3 rears is compressed spacing.In the time that needs are taken a blood sample, twist off drive block 7 and rotate to twist off nook closing member sleeve 6 and with the coupling part of blood taking needle 3, nook closing member sleeve 6 and needle stand 31 are separated thereby grasp, now in the exposed air ambient in housing 1 of needle core of blood taking needle 32 and in serviceable condition.Then the front end of this hemostix is aimed at and needed the human body of blood sampling (as the blood vessel medically often adopting) gently to press forward, when light pressure human body, people's cognition produces counteracting force backward to this hemostix, and this counteracting force promotes out backward syringe 8 and pushes away the exposed front end in housing 1 outside of hair device 5.Go out syringe 8 and push away hair device 5 to be subject to the backward rear movement of human body counteracting force, the mobile hair device 5 that pushes away coordinates promotion elastic clip 22 to open to both sides by inclined-plane backward, thereby makes blood taking needle needle stand 31 no longer be subject to the spacing lug 24 of clamp port 23() restriction.Stage clip 4 in compress energy storage state will promote blood taking needle 3 and launch away forward along ejection chamber 9, make nook closing member 32 tips of blood taking needle 3 stretch out needle outlet 81 outward and puncture human vas, play the object of blood sampling, the size of needle stand 31 is larger than needle outlet 81 sizes, and therefore needle stand 31 is blocked in needle outlet 81 rear sides and in ejection chamber 9.Complete when taking a blood sample, stage clip 4 is due to elastic return, make blood taking needle be returned to stage clip and unclamp level, due to elastic clip 22 elastic return, blood taking needle needle stand 31 moves forward and departs from clamp port 23, stop after blood taking needle 3 and move and again enter clamp port 23 thereby the spacing fin 27 on inclined-plane 26 is arranged in needle stand 31 rear sides, also just prevented the secondary utilization of this hemostix.

Certainly, above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow people can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations doing according to the spirit of this utility model main technical schemes or modification, within all should being encompassed in protection domain of the present utility model.

Claims

1. a disposable blood taking device, comprises housing (1), the through hole connecting before and after having in this housing (1); The rear end of described housing (1) is fixed with the holder (2) stretching in described through hole, has clamp port (23) on described holder (2), and the blood taking needle (3) that in this clamp port (23), clamping is stretched out before oriented; Described blood taking needle (3) comprises needle stand (31) and is fixed on the nook closing member (32) of this needle stand front end, between described blood taking needle (3) and holder (2), is folded with to blood taking needle (3) and applies the stage clip of elastic force (4) forward; In the through hole of described housing (1), be also provided with and described clamp port (23) can be opened to allow that blood taking needle (3) discharges from clamp port pushes away hair device (5), this front end that pushes away hair device (5) stretches out housing (1) outside;

It is characterized in that: described in push away hair device (5) front end be connected with that one that stretch out forward and front and back position is adjustable goes out syringe (8), the inside that pushes away hair device (5) and go out syringe (8) is shaped with the ejection chamber (9) for blood taking needle (3) ejection operation, and the front end that goes out syringe (8) is provided with the needle outlet (81) being connected with described ejection chamber (9), come in and go out for needle core of blood taking needle (32); Described nook closing member (32) is provided with and is enclosed within its outer nook closing member sleeve (6), between this nook closing member sleeve (6) and needle stand (31), be fixedly connected with by easily twisting off material, the front end of nook closing member sleeve (6) be connected with stretch out housing (1) outward twist off drive block (7).

2. disposable blood taking device according to claim 1, it is characterized in that: described in push away hair device (5) front end be shaped with external screw thread, described go out the rear end of syringe (8) be shaped with female thread, described in push away hair device (5) and go out between syringe (8) and be connected by described internal and external threads.

3. disposable blood taking device according to claim 2, is characterized in that: described in to push away the externally threaded pitch of hair device (5) front end be 1mm.

4. disposable blood taking device according to claim 2, is characterized in that: described in go out on the outer wall of syringe (8) to be shaped with the friction rib (82) of being convenient to it to be rotated.

5. disposable blood taking device according to claim 1, it is characterized in that: described holder (2) comprises firm banking (21), the front end of this firm banking is fixedly installed two elastic clips that stretch out forward (22), and these two elastic clips (22) form described clamp port (23) jointly; The needle stand (31) of described blood taking needle (3) is positioned between described two elastic clips (22), and described stage clip (4) is folded between needle stand (31) and firm banking (21) and to needle stand (31) and applies elastic force forward; The front end of described two elastic clips (22) is provided with to projecting inward spacing lug (24), described needle stand (31) is provided with limited block (33), and described spacing lug is against described limited block front side to stop needle stand (31) to skid off forward outside clamp port (23) under the elastic force effect of stage clip (4).

6. disposable blood taking device according to claim 5, it is characterized in that: the rear end of described two elastic clips (22) is all shaped with outwardly buckle (25), on the through hole hole wall of described housing (1), be shaped with the lock dog (11) matching with described buckle (25), between described holder (2) and described housing (1), be fixed by described buckle (25) and lock dog (11).

7. disposable blood taking device according to claim 5, it is characterized in that: described needle stand (31) is provided with the guide pad (34) that is positioned at described limited block (33) front side, described guide pad (34) and described ejection chamber (51) match to locate the direction of ejection of described blood taking needle (3).

8. disposable blood taking device according to claim 1, is characterized in that: the through hole in described housing (1) is circular hole.