CN203354551U

CN203354551U - Disposal blood sampler

Info

Publication number: CN203354551U
Application number: CN 201320463502
Authority: CN
Inventors: 柳新荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2013-12-25
Anticipated expiration: 2023-07-31

Abstract

The utility model discloses a disposal blood sampler. The blood sampler comprises a shell, wherein a clamping part is fixed in the shell, a blood taking needle is clamped on the clamping part, and a compression spring is clamped between the clamping part and the blood taking needle; a clamping mouth opening part which acts on the clamping part to open a clamping mouth on the clamping part is arranged at the front side of the clamping part; part of the clamping mouth opening part is exposed outside the shell; the clamping mouth opening part is provided with an ejection cavity for ejecting the blood taking needle and an ejection hole communicated with the ejection cavity are formed in the clamping mouth opening part; a needle core sleeve sleeved outside the blood taking needle core, and is fixedly connected with a needle seat through an easily twisted material. According to the disposal blood sampler, common occurrence of blood taking needle blockage, blood taking needle ejection blockage and the like in key slot fit can be avoided, and the problems that sampled blood is easily polluted caused by insufficient protection on the blood taking needle, and the blood taking needle can be used after being cleaned and sterilized in the prior art can be 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

Often need to carry out the blood sample collection program during blood test; 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 special population are waited to the sampling of taking a blood sample as the child.The skin that only blood taking needle need be pressed close to user when automatic blood-taking needle is used is taken a blood sample and is got final product, and can carry out one-handed performance.Adopt the automatic blood-taking needle blood sampling than blood collection needle method blood sampling time shorten in average 1.5min, 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 the blood taking needle rear end, described blood taking needle generally adopts the 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 the housing inboard and the guide pad cooperation is set on needle core of blood taking needle and forms the 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, a pair of elastic claw is arranged on end cap in shell, this elastic claw utilize grab and chucking power by the 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, by the gathering sill of long foot inboard, with the feather key on nook closing member, coordinates formation to shoot guide frame on the other hand, this guide frame and elastic clip structure are the decussation layout; Setly on nook closing member from locking face, after shooting, with the grab bottom, form a structure that prevents horizontal reset on nook closing member.Yet, in use find, due to being equipped with of feather key and gathering sill, make blood taking needle can be subject to the impact of frictional force in ejection travel, effect is launched in impact; In addition, when the rear end stage clip discharges, the direction of ejection of blood taking needle is not direction with gathering sill and feather key when consistent, can cause that blood taking needle is stuck can not be used, and even more serious consequence likely causes the injury to the person of blood collecting; In addition, the block adopted in this patent and needle core of blood taking needle carry out the nature fastening, and the joint portion of itself and nook closing member is not sealed and matched, and cause this blood taking needle before the blood sampling operation easily to be 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, in order to determine insulin dose and make adjusting for the different phase of comings and goings and growth.Blood glucose and ketoboidies detect skin tips such as need to puncturing finger tip and get a little blood.Generally need a Finger sting apparatus with blood taking needle.When using, puncture blood capillary with blood taking needle, after blood flows out naturally, the blood of drawing aequum with micropipet is standby.

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; be provided with ejection chamber in housing; blood taking needle and stage clip are placed in ejection chamber and connect into elastic sliding structure on direction of ejections; housing is provided with the needle outlet consistent with direction of ejection; blood taking needle and case side between be provided with card penetrate structure on the stage clip compressed path; the head of blood taking needle is provided with the protection sleeve; one end of protection sleeve is socketed in the 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, during use, by pulling out the protection sleeve, just can effectively take a blood sample.

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

The present invention comes therefrom.

Summary of the invention

This utility model purpose is: for the problems referred to above; a kind of disposable blood-taking device is provided; to solve blood-taking device 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 solves that the ineffective blood that causes taking a blood sample of blood taking needle protection in prior art subjects to pollute, needle core of blood taking needle need to carry out the problem that could use after the cleaning-sterilizing aseptic process simultaneously.

The technical solution of the utility model is: a kind of disposable blood-taking device comprises housing, the through hole connected before and after having in this housing; The rear end of described housing is fixed with the holder stretched in described through hole, on described holder, has clamp port, and the blood taking needle that in this clamp port, clamping is stretched out before oriented; The nook closing member that described blood taking needle comprises needle stand and is fixed on this needle stand front end, be folded with stage clip between described blood taking needle and holder, and this stage clip applies elastic force forward to blood taking needle; Also be provided with in the through hole of described housing and described clamp port can be opened to allow the clamp port that blood taking needle discharges from clamp port open part, described clamp port opens part and is positioned at the front side of holder and the ejection chamber that its inside is shaped with confession blood taking needle ejection operation; The front end that described clamp port opens part stretches out outside housing, and be provided with described ejection chamber, be connected, for needle core of blood taking needle, come in and go out launch hole; 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, by easily twisting off material, be fixedly connected with, the front end of nook closing member sleeve be connected with stretch out housing outer twist off drive block.

As preferably, described holder comprises firm banking, and the front end of this firm banking is fixedly installed two elastic clips that stretch out forward, and these two elastic clips are common forms described clamp port; 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 outside clamp port forward under the elastic force effect of stage clip.

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

As preferably, 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.

As preferably, the front end of described elastic clip is shaped with inclined-plane, and described clamp port opens part and comprises two clapboards that match with described inclined-plane and be connected in two connecting plates between two clapboards, and described two clapboards and two connecting plates are common forms described ejection chamber.

As preferably, be shaped with the spacing fin perpendicular to the blood taking needle direction of ejection on described inclined-plane.

As preferably, described nook closing member sleeve comprise be enclosed within the outer socket part of nook closing member and with the connecting portion that twists off drive block and be fixedly connected with; Described socket part is the hollow circular tube structure, and one end and described connecting portion are connected as a single entity, and the other end and blood taking needle needle stand easily twist off by described that material is airtight to be fixedly connected with.

As preferably, described connecting portion is provided with fixture block; Described drive block one end that twists off arranges and connects pulloverly, and section is managed in other end setting, connects on pullover and offers hole clipping; Described connecting portion insert described connection pullover in, and in the hole clipping of the fixture block Snap joint on connecting portion on pullover.

As preferably, the described material that easily twists off is the PE material.

The utility model has the advantages that:

1, 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.The ejection chamber that in the design, the structure of blood taking needle and clamp port open in part adapts, and makes ejection chamber and blood taking needle matched in clearance, when guaranteeing that blood taking needle launches the blood sampling operation, makes it reduce the impact of peripheral factor in ejection travel.

2, this disposable blood-taking device of this utility model arranges stage clip between the fixed base frame of holder and blood taking needle, and during use, blood taking needle launches out and launches hole and punctured blood sampling site due to the release of accumulation of energy stage clip; When stage clip is elongated to the longest position, factor due to the stage clip elastic return, the blood taking needle needle stand moves forward and breaks away from clamp port, stopped after blood taking needle to move and again entered clamp port thereby the spacing fin on elastic clip front end inclined-plane is arranged in the needle stand rear side, effectively prevented the secondary utilization of this blood-taking device.

3, 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 the 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 blood-taking device that is clasped on housing upper locking piece and elastic clip, make it be assembled into overall structure; Clamp port opens part and stretches out forward the outer and end of housing and offer and launch hole, moves after can driving comparatively easily clamp port to open part while making user use.

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

5, 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 the nook closing member sleeve is Split type structure.Adopt Split type structure conveniently to carry out the industrial processes of blood taking needle, reduce the fussy degree of follow-up assembly working.And that end that this nook closing member sleeve socket part is connected with connecting portion is airtight, the other end is fixedly connected with the blood taking needle pedestal, the probability of environmental contamination reduction nook closing member.

The accompanying drawing explanation

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

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

The confined state structural representation that Fig. 2 is the disposable blood-taking device of this utility model embodiment;

Another confined state structural representation that Fig. 3 is the disposable blood-taking device of this utility model embodiment;

The partial structurtes schematic diagram that Fig. 4 is the disposable blood-taking device of this utility model embodiment;

Fig. 5 is nook closing member sleeve and the structural representation that twists off drive block in the disposable blood-taking device of this utility model embodiment.

Wherein: 1-housing, 11-lock dog, 12-spacing preiection;

The 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-;

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

The 4-stage clip;

The 5-clamp port opens part, the 51-ejection chamber, and the 52-clapboard, the 53-connecting plate, 54-launches hole;

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 section, the 73-hole clipping.

The specific embodiment

As shown in Figure 1, Figure 2 and Figure 3, this disposable blood-taking device that the present embodiment provides, comprise a housing 1, the through hole connected before and after having in this housing 1, and the cross section of this through hole is rectangular.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.Be provided with in clamp port 23 and this clamp port 23 blood taking needle 3 that clamping is stretched out before oriented on holder 2.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 be folded with stage clip 4 and this stage clip 4 between blood taking needle 3 and holder 2 and apply elastic force forward (thereby holder 2 clamp blood taking needle 3 make stage clip between the two in the pressurized energy accumulating state) to blood taking needle 3.The clamp port that described clamp port 23 can be opened to allow blood taking needle 3 discharge from clamp port also is housed in the through hole of described housing 1 and opens part 5, this clamp port opens part 5 and is positioned at the front side of holder 2 and the ejection chamber 51 that its inside is shaped with confession blood taking needle 3 ejection operations.The front end that clamp port opens part 5 stretches out outside housing 1, and that the front end that clamp port opens part 5 is provided with is that be connected with described ejection chamber 51, for needle core of blood taking needle 32, come in and go out launch hole 54, this size of launching hole 54 is less than the size of needle stand 31, thereby needle stand 31 can be limited in to launch hole 54 rear sides and stop whole blood taking needle to eject fully to launch outside hole, injures the person of blood collecting.And, in the present embodiment, 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, by easily twisting off material, is fixedly connected with, thereby make, in the confined space of tip in nook closing member sleeve 6 and needle stand 31 formation of nook closing member 32, to avoid the pollution of external environment.In order to facilitate this blood-taking device in use, user can be turned round nook closing member sleeve 6 easily from needle stand 31, and the special front end at nook closing member sleeve 6 of this example is connected with to stretch out and twists off drive block 7 outside housing 1.

Said 'fornt', 'back' in the present embodiment, be to 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 Fig. 3, 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, specific as follows: the rear end of described two elastic clips 22 all is shaped with outwardly buckle 25, be shaped with the lock dog 11 matched with described buckle 25 on the through hole hole wall of described housing 1, between described holder 2 and described housing 1, by described buckle 25 and lock dog 11, be fixed, as Fig. 1.During assembling, the elastic clip of holder 2 front portions 22 is inserted in housing 1 aperture, rear end, firmly, push away, make buckle 25 on holder 2 snap in lock dog 11 front sides of housing 1, holder 2 and housing 1 can be fixed together, after having assembled, the firm banking 21 of holder 2 is exposed to outside housing 1.

In addition, this example also is 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 51 match to locate direction of ejection (guide pad 34 and ejection chamber 51 matched in clearance of described blood taking needle 3, but relative sliding between the two), thereby depart from the generation of the phenomenon that causes taking a blood sample with the direction of motion when launching of avoiding blood taking needle 3, as Fig. 1.And chamfered has also been carried out in the junction that this example coordinates with ejection chamber 51 at guide pad 34, has reduced frictional force between guide pad and ejection chamber, make again it keep good guide effect.

In the present embodiment, the front end of described elastic clip 22 is shaped with inclined-plane 26.The detailed construction that described clamp port opens part 5 is as described in Fig. 1 and Fig. 3: it comprise with as described in two clapboards 52 that match of inclined-plane 26 and be connected in two connecting plates 53 between these two clapboards, described two clapboards 52 and two connecting plates 53 are common forms described ejection chamber 51.Clamp port opens part 5 can be in the interior slip of housing 1, but due to spacing preiection 12 effects that are subject to housing 1 place, front end aperture setting, clamp port opens part 5 and can not integral body skids off forward housing 1 outside fully (size of fore-end that clamp port opens part is less, only this part is stretched out outside housing), as Fig. 1.And also be shaped with the spacing fin 27 perpendicular to the blood taking needle direction of ejection on the inclined-plane 26 of described elastic clip 22 front ends, as Fig. 3.

In the present embodiment, the detailed construction of described nook closing member sleeve 6 as shown in Figure 5, it comprise be enclosed within the outer socket part 61 of 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 the hollow circular tube structure, and 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 being integral), and in the present embodiment, the described material that easily twists off is the PE material.In this example, blood taking needle 3 is made integral structure with nook closing member sleeve 6 when producing, thereby has guaranteed that this disposable blood-taking device had just suffered in gnotobasis all the time before assembling.And in this example the tip of nook closing member 32 front portions with very little bending axially hook (hook power is little) in socket part 61, make close-fitting between nook closing member 32 and socket part 61, avoided very easily from blood taking needle 3, splitting away off the generation of situation because unexpected factor causes nook closing member sleeve 6, as Fig. 2.

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 ends and arrange and connect pulloverly 71, section 72 is managed in other end setting, connects pullover 71 and is provided with hole clipping 73.Described connecting portion 62 inserts in described connections pullover 71, and in the hole clipping 73 on 63 Snap joints of the fixture block on connecting portion 62 pullover 71, thus by nook closing member sleeve 6 with twist off drive block 7 and be fixed together.

Now in conjunction with Fig. 1～Fig. 5; the operation principle of this disposable blood-taking device of the present embodiment is described below: when this disposable blood-taking device 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, by the stage clip 4 at blood taking needle 3 rears, compressed spacing.When 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 blood-taking device being aimed to the human body (as the blood vessel medically often adopted) that needs blood sampling gently presses forward, during light pressure human body, the people knows from experience this blood-taking device generation counteracting force backward, and this counteracting force promotes backward clamp port and opens the exposed front end in housing 1 outside of part 5.Clamp port opens part 5 and is subject to the backward rear movement of human body counteracting force, and mobile clamp port opens part 5 and coordinates and promote elastic clip 22 and 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 the compress energy storage state will promote blood taking needle 3 and launch away forward along ejection chamber 51, nook closing member 32 tips of blood taking needle 3 are stretched out launch the outer and puncture human vas in hole 54, play the purpose of blood sampling, it is large that the size ratio of needle stand 31 launches hole 54 sizes, so needle stand 31 is blocked in and launches hole 54 rear sides and in ejection chamber 51.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 breaks away from clamp port 23, stopped after blood taking needle 3 to move and again entered 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 blood-taking device.

Certainly, above-described embodiment is only explanation technical conceive of the present utility model and characteristics, and its purpose 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 of 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, is characterized in that: comprise housing (1), the through hole connected before and after having in this housing (1); The rear end of described housing (1) is fixed with the holder (2) stretched 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; The nook closing member (32) that described blood taking needle (3) comprises needle stand (31) and is fixed on this needle stand front end, be folded with stage clip (4) between described blood taking needle (3) and holder (2), and this stage clip (4) applies elastic force forward to blood taking needle (3); Also be provided with the clamp port that described clamp port (23) can be opened allow blood taking needle (3) discharge in the through hole of described housing (1) and open part (5) from clamp port, described clamp port opens part (5) and is positioned at the front side of holder (2) and the ejection chamber (51) that its inside is shaped with confession blood taking needle (3) ejection operation; The front end that described clamp port opens part (5) stretches out outside housing (1), and be provided with described ejection chamber (51), be connected, for needle core of blood taking needle (32), come in and go out launch hole (54); 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), by easily twisting off material, be fixedly connected with, 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 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).

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

4. disposable blood-taking device according to claim 2, 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, and described guide pad (34) and described ejection chamber (51) match to locate the direction of ejection of described blood taking needle (3).

5. disposable blood-taking device according to claim 2, it is characterized in that: the front end of described elastic clip (22) is shaped with inclined-plane (26), described clamp port opens part (5) and comprises two clapboards (52) that match with described inclined-plane (26) and be connected in two connecting plates (53) between two clapboards, and described two clapboards (52) and two connecting plates (53) form described ejection chamber (51) jointly.

6. disposable blood-taking device according to claim 5, is characterized in that: be shaped with the spacing fin (27) perpendicular to the blood taking needle direction of ejection on described inclined-plane (26).

7. disposable blood-taking device according to claim 1 is characterized in that: described nook closing member sleeve (6) comprise be enclosed within the outer socket part (61) of 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 the hollow circular tube structure, and 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 to be fixedly connected with.

8. disposable blood-taking device according to claim 7, it is characterized in that: described connecting portion (62) is provided with fixture block (63); Described drive block (7) one ends that twist off arrange connection pullover (71), and section (72) is managed in other end setting, connects on pullover (71) and offers hole clipping (73); Described connecting portion (62) inserts in described connection pullover (71), and in the hole clipping (73) on fixture block (63) Snap joint pullover (71) on connecting portion (62).

9. disposable blood-taking device according to claim 1, it is characterized in that: the described material that easily twists off is the PE material.