CN208808493U - A kind of vein blood taking needle - Google Patents

Abstract

A kind of vein blood taking needle, including blood-collecting needle tube, blood taking needle tube socket, send blood needle tubing；Blood syringe intracavity is sent to be connected with blood taking needle tube socket inner cavity；It is characterized in that, being arranged a casing flexible outside blood-collecting needle tube, cannula tip has coated blood-collecting needle tube tip, and casing shoe is connected with casing seat, and casing seat is set in outside blood-collecting needle tube；Casing seat is connected with casing seat handle, and casing seat handle is equipped with contact portion；Elasticity part is equipped between casing seat and blood taking needle tube socket；It drives it towards mobile close to the direction of blood taking needle tube socket when external force is applied to casing seat by casing seat handle, and forces elasticity part deformation occurs, blood-collecting needle tube tip is exposed from cannula tip；Casing seat handle contact part is fixed to blood-collecting needle tube seating face, prevent elasticity part from restoring, after blood-collecting needle tube tip enters vein, reducing finger can make casing seat be forced to the direction movement far from blood taking needle tube socket the pressing force of casing seat handle, and cannula tip is finally made to have coated blood-collecting needle tube tip.

Description

A kind of vein blood taking needle

Technical field

The utility model relates to a kind of vein blood taking needles, belong to the field of medical instrument technology.

Background technique

Venipuncture and related venous blood collection are a kind of the most commonly used general technologies in clinical departments room, most-often used Blood taking needle includes one for puncturing blood-collecting needle tube, the blood-collecting needle tube fixed blood-collecting needle tube in it of skin and wall of vein Seat, one send blood needle tubing；Blood syringe intracavity is sent to be connected directly or by delivery hose inner cavity with blood taking needle tube socket inner cavity；Send blood Conformal outside needle tubing to be arranged a gum cover, gum cover will send blood needle tubing to be isolated with external fluid；After blood-collecting needle tube enters vein, blood needle is sent Pipe need to pierce through the rubber plug of containing vacuum heparin tube tube body top end opening, and blood spurting flows into vacuum blood collection tube cavity, blood volume foot It is extracted when enough and send blood needle tubing, gum cover elastic recovery coats again send blood syringe tip end resistance Hemostatic Oral Liquid to flow out, and may thereafter continue to pierce through Another vacuum blood collection tube continues blood sampling process.

It is clear that success of the success of venous blood collection firstly the need of venipuncture, disinfection when venipuncture procedure starts Nearby skin, the finger of subsequent proficiency are mainly another hand-held needle of thumb taught skin and skin in a suitable angle to point of puncture Sharp blood-collecting needle tube tip is first pierced into skin, then breaks through wall of vein, the pin hole of blood-collecting needle tube tip ramp enters vein In lumen, blood is squeezed into blood-collecting needle tube via the pin hole on inclined-plane by vein pressure, in blood-collecting needle tube form or transparent blood-collecting needle tube See that red blood inflow is also referred to as blood back as the pin hole for judging inclined-plane and enters vein lumen on seat or transparent delivery hose Foundation；This blood back mode is the passive blood back of vein pressure dependence；However, many factors cause the pin hole even if inclined-plane into Visible blood back can not also be occurred by having entered vein lumen, such as when vein pressure is very low, the shock patients of common inadequate circulatory blood volume, Thus the passive blood back mode of vein pressure dependence is extremely insensitive；For another example close to the pin hole on the inclined-plane of venous valve, venous valve Unidirectional flow control effect makes blood difficultly flow into blood-collecting needle tube；For another example wall of vein is close on the inclined-plane of pin hole makes blood cannot be introduced into blood sampling Needle tubing；Also as the inclined-plane of pin hole is located at vein knee；When there is the case where these have no blood back, operator has been generally acknowledged that pin hole Not yet enter vein lumen, blood-collecting needle tube can be pushed further into, so that vein tube wall enters the blood sampling of vein lumen from side Easily from opposite side, vein tube wall is pierced by needle tubing tip, i.e., vein is run through by blood-collecting needle tube, and venipuncture is caused to fail, can not be by blood The extraction of liquid sample, the delay especially examined to the blood group of emergency, blood electrolyte can jeopardize rapidly patient vitals.

Even if also needing to continue blood-collecting needle tube to promote certain distance to intravenous however, having seen blood back in puncturing, it is ensured that The pin hole on inclined-plane cmpletely enter duct of Arantius it is intracavitary, when vein move towards visually can not judge when the step for blood-collecting needle tube Propulsion is entirely to implement in the state of blindness, and the tip direction of travel of blood-collecting needle tube is easily led when moving towards slightly different with vein Safe inserting needle is intimate when cause vein, which is run through, causes puncture failure, especially patient's vein to move towards not visible and vein lumen is smaller Extravagant hope.

Furthermore clinical manipulation mostly under, taking a blood sample in upper index finger by the connected handle of blood taking needle tube socket dominated by hand, thumb Index finger below needle tubing seat inevitably touches the skin of the neighbouring point of puncture after just sterilizing, micro- when having on index finger Biochron, which easily pollutes point of puncture, leads to pipeline related blood stream infections (CRBSI), has a large amount of clinical literatures to report；And when operating Index finger between skin and blood taking needle tube socket also will affect the selection of angle between needle angle i.e. blood-collecting needle tube and skin, Namely the selection of the best angle between the vertical projecting line of blood-collecting needle tube and blood-collecting needle tube on the skin will receive it is sandwiched therebetween Index finger interference, when especially selecting lesser best needle angle, finally reduce puncture success rate, patent 01115577.9 Stereo intravenous puncture needle proposed a solution, but the needle wing for being significantly higher than skin will increase and surprisingly be touched in blood collection procedure Touching causes blood-collecting needle tube from the risk intravenously deviate from.

It, may be because of inevitable limb activity, tiltedly when the blood-collecting needle tube of non-remaining needle is in the intracavitary blood sampling of duct of Arantius The pin hole in face, which is not only easy to be attached at wall of vein, causes blood flow unsmooth, and the tip of blood-collecting needle tube can also cause because of limb activity Blood-collecting needle tube and vein relative displacement and through vein cause blood sampling stop, seriously affect the diagnosis of disease.

Above-mentioned any mode of operation and process all inevitably face the challenge of individuation venipuncture procedure, described a Body refers to the skin thickness of patient, skin hardness, vein degree of exposure, vein thickness, the vein depth, wall of vein hardness, quiet Arteries and veins bending degree, venous valve distribution etc. differ widely.

It is that blood-collecting needle tube tip enters vein lumen first even if taking a blood sample successfully, blood is sharp from microscopic dimensions lower surface, The coarse each radial angle of blood-collecting needle tube pinhole edges is quickly inhaled into blood-collecting needle tube inner cavity, and the part cell in blood flow can be fast Speed impact or the sharp, rough edge by blood-collecting needle tube pin hole, the dissection that sharpened edge generates will lead to a large amount of blood The destruction of cell especially red blood cell；The other side, when blood surface rigid equally under microscopic dimensions is sharp, coarse send blood When the quick spurting of needle tubing pinhole edges flows into vacuum blood collection tube cavity, same dissection will lead to a large amount of haemocytes especially It is the destruction of red blood cell, more significant haemolysis (most literature reports that the hemolysis rate of existing venous blood collection is 5-10%) occurs, Strong influence the accuracy of blood test.

In short, following serious problems easily occur for the vein blood taking needle of existing clinical use:

1. see blood back, the sharp tip of blood-collecting needle tube leads to puncture failure through vein during continuation inserting needle.

2. the passive blood back mode of vein pressure dependence to force down when patient's vein or whens other correlation circumstances is difficult to see To blood back,

This blood-collecting needle tube tip for having entered vein lumen, which continues to promote, leads to puncture failure through wall of vein.

3. because operation in be located at blood taking needle tube socket below index finger inevitably touch it is neighbouring after just sterilizing The skin of point of puncture, when there being microorganism on index finger, easily pollution point of puncture leads to pipeline related blood stream infections (CRBSI).

4. because the index finger being located at below blood taking needle tube socket in operation will affect between needle angle i.e. blood-collecting needle tube and skin The selection of angle reduces puncture success rate.

5. the sharp blood-collecting needle tube tip of its in blood collection procedure is easy to because the factors such as limb activity are through vein.

6. the sharp coarse blood-collecting needle tube pinhole edges fast turbulent shape in blood surface rigid under microscopic dimensions is inhaled Entering blood-collecting needle tube inner cavity will lead to the destruction of a large amount of haemocytes especially red blood cell.

7. blood surface rigid under microscopic dimensions is sharp coarse to send blood needle tubing pinhole edges fast turbulent spurting Flowing into vacuum blood collection tube cavity will lead to the destruction of a large amount of haemocytes especially red blood cell.

Summary of the invention

The utility model to solve the above-mentioned problems, provides a kind of vein blood taking needle.

Purpose of the utility model is realized as follows:

A kind of vein blood taking needle a, comprising: blood-collecting needle tube for puncturing skin and wall of vein, one by blood-collecting needle tube The blood taking needle tube socket fixed in it, one send blood needle tubing；Send blood syringe intracavity directly or by delivery hose inner cavity and blood taking needle Tube socket inner cavity is connected；Send it is conformal outside blood needle tubing be arranged a gum cover, gum cover will send blood needle tubing to be isolated with external fluid；Its feature exists In blood-collecting needle tube is arranged a casing flexible outside, and cannula tip has coated sharp blood-collecting needle tube tip, close to blood taking needle tube socket The casing shoe of side is connected with the casing seat of inner hollow, and casing seat is set in outside blood-collecting needle tube, and inner hollow diameter is not less than Blood-collecting needle tube outer diameter；Casing seat, which is connected with a part, may extend to the casing seat handle in blood taking needle tube socket region, casing seat handle one It is casing seat handle contact part that part can touch blood taking needle tube socket because of compression；It is equipped between casing seat and blood taking needle tube socket At least one by the external force meeting elasticity part that deformation occurs；When blood taking needle tube socket is fixed, and external force is directly or indirectly through set Tube socket handle is applied to casing seat and it is driven to move towards close to the direction of blood taking needle tube socket, and forces elastic part connected to it Part deformation occurs storage elastic potential energy, blood-collecting needle tube tip from coat its cannula tip expose；Operator's finger is by casing seat The contact portion that handle is located at blood taking needle tube socket region is fixed to blood-collecting needle tube seating face, prevents elasticity part from restoring, After blood-collecting needle tube tip enters vein, reducing or release finger can make casing seat because of elasticity part the pressing force of casing seat handle The elastic recovering force that generates of elastic potential energy release and be forced to that the direction far from blood taking needle tube socket is mobile, and finally make soft Cannula tip has coated sharp blood-collecting needle tube tip；Elastic recovering force after elasticity part deformation is greater than internal surface of casing and adopts Frictional force between blood needle tubing outer surface；When sending blood needle tubing to be connected by delivery hose with blood taking needle tube socket, it is usually connected with one Blood needle tubing seat is sent, blood needle tubing seat one end is sent to connect delivery hose, blood needle tubing is sent in other end connection.

The top of casing flexible outside blood-collecting needle tube has coated sharp blood-collecting needle tube tip, not only ensures to see blood back The safety of inserting needle process afterwards and after puncturing successfully in blood collection procedure, blood is no longer radial to be flowed quickly through under microscopic dimensions The sharp coarse blood-collecting needle tube pinhole edges in surface of rigidity, but blood-collecting needle tube is axially flowed into from ferrule openings edge flexible It is outstanding to haemocyte to avoid the sharp coarse blood-collecting needle tube pinhole edges in surface rigid under microscopic dimensions to the full extent for inner cavity It is haemolysis caused by the destruction of red blood cell.

For the ease of holding, there are two casing seat handles, and the contact portion of two casing seat handles extends to blood-collecting needle tube It can be pressed to simultaneously blood-collecting needle tube seating face by the left and right sides of seat, two finger forces；Blood taking needle tube socket have above and below and Left and right side, here be using when contact skin side.

The utility model component selected materials be medical material commonly used in the art, as casing can be used polyurethane (PU), Polyvinyl chloride (PVC) or corresponding thermoplastic elastomer (TPE) (TPE) etc. can be used in delivery hose.

Preferably, elasticity part is the compressed spring being set between casing seat and blood taking needle tube socket；Can be used alloy or Nonmetallic materials production.

Further include limiting component to accurately manipulate, defines axially opposing displacement between casing seat and blood taking needle tube socket Range；The limiting component, which can be independent pin member and can also be on casing seat handle and blood taking needle tube socket, to be matched The part of effect.

Further, on casing at least one in ring week region be the socket with the sealing of blood-collecting needle tube outer surface without making blood Liquid stream goes out, and the socket of the sealing refers to that the casing inner diameter of socket place no more than blood-collecting needle tube outer diameter, does not have when in casing preferably The internal diameter of casing herein is less than blood-collecting needle tube outer diameter when having blood-collecting needle tube, so can generate when being placed on outside blood-collecting needle tube to blood taking needle The pressure in tube outer surface ring week, so that it is guaranteed that the socket of sealing.

Preferably, at least one blood back peep hole being connected to blood-collecting needle tube inner cavity is provided on blood-collecting needle tube；Casing is soft Property is transparent, at least one, region was in ring week on the casing between position corresponding with blood-collecting needle tube blood back peep hole and casing seat Socket with the sealing of blood-collecting needle tube outer surface is without flowing out blood；The area Huan Zhou of described sleeve pipe and the sealing of blood-collecting needle tube outer surface Domain refers to that in the state that blood-collecting needle tube tip is wrapped by, the ring week region of this sealing socket is observed still in blood-collecting needle tube blood back Between hole and blood taking needle tube socket, it is ensured that gap outflow of the blood not between casing and blood-collecting needle tube in vein V.

In order to generate active sensitive blood-return, blood taking needle tube socket is equipped with a windowed regions, exposes and be set in it Delivery hose between windowed regions top end face and bottom face；Casing seat handle is set on position corresponding with windowed regions There is pressing protrusion, pressing protrusion can be pressed downward forcing the delivery hose depressed deformation in windowed regions；When vein pressure is lower or it In the case of him, blood back is had no and operator gently loosens casing seat handle and makes when suspecting that blood-collecting needle tube tip has entered vein It is lifted in pressing protrusion, the delivery hose in windowed regions is restored from depressed deformation state because of natural resiliency, and the negative pressure of generation is taken out Blood back is easily seen in the intraluminal blood sucking blood-collecting needle tube inner cavity of vein by suction effect, can trust that starting operates in next step.

Oppressed to more easily oppress the delivery hose in windowed regions and release, casing seat handle and casing seat it Between connection be including using the connection being rotated up and down including rotary shaft, can be on the basis of casing seat be almost disturbed Casing seat handle does being rotated up and down away from or approaching blood taking needle tube socket upper surface by axis of junction.Upwards when rotation, casing Pressing protrusion on seat handle can get rid of windowed regions top end face limitation ot it；It is described to be rotated up and down, refer to casing seat handle Contact portion free-end far from the direction of blood taking needle tube socket upper surface be it is upper, the direction towards blood taking needle tube socket upper surface is Under；Described sleeve pipe seat is not disturbed almost, is referred to when the finger that external force is usually operator acts on the contact of casing seat handle When part is rotated up and down it, this external force will not related casing seat synchronous rotary.

Further a kind of simple preferred, the connection of casing seat handle contact part and casing seat is transverse area part The Weak link of wall thickness reduction, the effect of similar rotary shaft is generated by Weak link, and the transverse direction refers to and blood-collecting needle tube central axes Vertical direction.

A kind of selection scheme is that limiting component is the limited post extended by blood taking needle tube socket top end face, passes through casing seat phase The through hole of corresponding position, limit post head corresponding size are greater than through hole.

Further, limiting component is the limited post extended by blood taking needle tube socket top end face, passes through the corresponding position of casing seat The through hole set, limit post head corresponding size are greater than through hole；Compressed spring is sheathed on outside limited post.

In order to ensure in blood collection procedure because may be unexpected caused by the activity of limbs, casing seat or casing seat handle with adopt It is equipped between blood needle tubing seat and casing seat is prevented to return component to the mobile resistance in blood taking needle tube socket direction, avoid sharp blood taking needle tip Hold because limb activity it is related due to deviate from from soft cannula tip.

A kind of preferred embodiment is, casing seat handle bottom surface be equipped with top droop circle and the relatively sharp keen resistance in bottom return it is convex Rise, can be slided in the groove of blood-collecting needle tube seating face or blood taking needle tube socket corresponding site, when elasticity part actuating sleeve tube socket to Blood-collecting needle tube tip it is mobile in place when, hinder go back to raised bottom and offsets with blood taking needle tube socket top end face, prevention casing seat reply is displaced.

Another program is that the part that casing seat handle extends to blood taking needle tube socket is equipped with through hole, and being cased in through hole can Up and down resistance is sold back to a grain-producing area, blood taking needle tube socket corresponding position recess at pin hole, when casing seat handle under elasticity part driving to When far from the movement of blood taking needle tube socket direction in place, resistance is sold back to a grain-producing area and can be slid to pin hole, prevents the phase of casing seat and blood taking needle tube socket To axial movement.

Further include the needle tubing seat handle being connected with blood taking needle tube socket in order to which operator preferably holds, needle tubing seat handle with Casing seat handle can be touched simultaneously by two fingers of operator.

In order to avoid the interference that index finger or other fingers select best needle angle when puncturing, needle tubing seat handle is independent Component, independent needle tubing seat handle, integral blade shape, bottom section is in inverted T shaped；It is big that blood taking needle tube socket upper surface is equipped with mouth handle Section is in inverted T shaped embedded groove, and the size for being embedded in slot cross-section is greater than corresponding independent needle tubing seat handle base cross-sectional dimension； Finger or so clamps independent needle tubing seat handle when operation, and finger does not contact the skin sterilized near point of puncture.

A kind of scheme is that needle tubing seat handle is integrally in foliaceous, is linked as in blood taking needle tube socket upper surface and blood taking needle tube socket One, be vertical-type needle tubing seat handle, the connection between vertical-type needle tubing seat handle and blood taking needle tube socket upper surface be include according to Hold in the palm the Weak link of longitudinal rotating shaft or longitudinal region local wall thickness reduction；Make vertical-type needle tubing seat handle can opposite and blood-collecting needle tube Seat rotates left and right；The longitudinal direction refers to the same direction with blood-collecting needle tube central axes；The left rotation and right rotation, refers to blood-collecting needle tube Central axes are the left rotation and right rotation of rotary shaft；Vertical-type needle tubing seat rotatable handle to side adhesive tape can be consolidated after venipuncture success It is fixed, then carry out the puncture procedure of subsequent possible multiple vacuum blood collection tubes.

Another program is that needle tubing seat handle is foliaceous horizontal type needle tubing seat handle, is connected with blood taking needle tube socket side；Phase Corresponding casing seat handle is foliaceous horizontal type casing seat handle, horizontal type casing seat handle and blood-collecting needle tube seat contact portion There is a protrusion in end；Blood taking needle tube socket corresponding site be equipped with a windowed regions, expose be set in it be located at windowed regions Delivery hose between top end face and bottom face；Horizontal type casing seat handle is pressed to blood taking needle tube socket upper surface, end Protrusion can make the delivery hose depressed deformation in windowed regions.

Yet another aspect is, needle tubing seat handle is in foliaceous, left and right two panels, respectively with blood taking needle tube socket left and right sides phase Even；Casing seat handle is that the thin-walled that extends to blood taking needle tube socket upper surface is rod-shaped；Left and right two panels needle tubing is turned up in radial inflow when use Seat handle is sandwiched therebetween by casing seat handle, and firmly squeezing makes the end-boss of casing seat handle press to blood taking needle tube socket windowing area Delivery hose in domain, is allowed to deformed depression.

The haemolysis occurred during vacuum blood collection tube cavity is flowed into order to reduce blood spurting, especially further includes penetrating blood Hose penetrates blood hose a part positioned at blood syringe intracavity is sent, and a part is leant out out of pin hole that send blood needle tubing tip, penetrates blood hose The end for leaning out part is equipped with a vertical opening.

Further, in order to which the area for increasing blood outflow port reduces flow velocity, the haemolysis because of the too fast initiation of flow velocity is reduced, especially It, which is that surface rigid under microscopic dimensions is sharp, coarse send destruction of the blood needle tubing pinhole edges to haemocyte especially red blood cell Caused haemolysis further includes penetrating blood hose, penetrates blood hose a part and is located at and send blood syringe intracavity, and a part is from sending blood needle tubing tip Pin hole in lean out, penetrate blood hose lean out part end be equipped with a vertical opening and at least one side opening；Penetrate blood hose The production of the flexible materials such as polyurethane, silicon rubber can be selected.

In order to avoid the haemolysis of the longer initiation of blood flow route (has document to show that vertical opening is easier to extend blood flow route And increase hemolysis rate), above-mentioned blood hose of penetrating leans out the end of part as cecum, and the end for penetrating blood hose is equipped at least one laterally Opening, the lateral spurting of blood contact vacuum blood collection tube side wall and stop, and avoid the longer blood for being directed toward vacuum blood collection bottom of the tube Flow path line, usual vacuum blood collection tube axial length is larger and diameter is smaller.

Same one kind scheme is to send blood needle tubing tip for cecum, and the pin hole of blood outflow is lateral pin hole, and lateral pin hole is extremely It is less one.

Further by lateral pin hole scheme with penetrate in conjunction with blood hose scheme, send blood needle tubing tip be cecum, blood outflow Pin hole is lateral pin hole, and lateral pin hole is at least one；It penetrates blood hose and is located at and send in blood syringe intracavity, penetrate blood hose and be equipped with and side To the corresponding lateral openings of pin hole；It is described it is corresponding refer to, the two be positioned next to and center is overlapped, blood is from penetrating blood hose Lateral openings outflow directly from sending the side of blood needle tubing to enter in heparin tube to pin hole, without contacting lateral pinhole edges, avoid Damage of the lateral pin hole rough edge to blood cell.

Further, sending blood needle tubing tip is cecum, and the pin hole of blood outflow is lateral pin hole, and lateral pin hole is at least one It is a；Blood hose is penetrated positioned at sending in blood syringe intracavity, penetrates blood hose equipped with lateral openings corresponding with lateral pin hole；Penetrate blood hose Lateral openings area be less than lateral pin hole area.

The beneficial effects of the utility model are:

1. see blood back, it is not required to exchange the operation bidirectionals such as finger, keeps finger home position that casing cladding can be made to adopt The sharp tip of blood needle tubing, thoroughly eliminating the tip that blood-collecting needle tube is sharp during continuing inserting needle leads to puncture failure through vein Risk.

2. sensitive active aspiration-type blood back, can be accurate instead of the passive blood back mode of insensitive vein pressure dependence Timely judge whether the pin hole of blood-collecting needle tube tip ramp enters vein lumen, avoids puncturing caused by blindness inserting needle and lose It loses.

3. the contactless needle of holding of skin is avoided to the greatest extent because operator's finger surface microorganism pollution point of puncture is led The pipeline related blood stream infections (CRBSI) of cause.

4. the contactless needle of holding of skin completely avoids the shadow selected by the index finger below blood taking needle tube socket needle angle It rings, to further improve puncture success rate.

5. casing flexible has coated sharp blood-collecting needle tube tip in blood collection procedure, greatly reduce because limbs are living The risk of vein is run through at blood-collecting needle tube tip caused by the factors such as dynamic.

6. blood flows into blood-collecting needle tube inner cavity from ferrule openings edge Axial Laminar shape flexible, avoid to the full extent The sharp coarse blood-collecting needle tube pinhole edges in rigid surface lead to the destruction of haemocyte especially red blood cell under microscopic dimensions Haemolysis.

7. blood flows into vacuum blood collection tube cavity from blood hose opening spurting flexible of penetrating, avoid to the full extent Rigid surface is sharp under microscopic dimensions coarse send blood needle tubing pinhole edges to lead to the destruction of haemocyte especially red blood cell Haemolysis.

Detailed description of the invention

The attached drawing for not limiting to the utility model is as follows:

Figure 1A: the puncture procedure schematic diagram of existing clinical common vein blood taking needle；

Figure 1B: the schematic diagram of existing clinical another vein blood taking needle；

Fig. 1 C: existing clinical vein blood taking needle is pierced into the schematic diagram of vacuum blood collection tube；

Fig. 2A: the schematic diagram of wall of vein is broken through in the sharp tip of blood-collecting needle tube；

Fig. 2 B: the schematic diagram of wall of vein is run through at the sharp tip of blood-collecting needle tube；

Fig. 2 C: schematic diagram of the sharp tip of blood-collecting needle tube close to venous valve；

Fig. 2 D: the pin hole enlarged diagram on the inclined-plane at the sharp tip of blood-collecting needle tube；

Fig. 2 E: the pin hole on the inclined-plane at the sharp tip of blood-collecting needle tube is close to the schematic diagram of wall of vein inner membrance；

Fig. 2 F: the sharp tip of blood-collecting needle tube is located at the intraluminal schematic diagram of vein；

Fig. 2 G: blood flow enters the schematic diagram of blood-collecting needle tube lumen；

Fig. 3 A: the schematic perspective view of the utility model embodiment 1, blood-collecting needle tube tip are exposed；

Fig. 3 B: the sectional perspective structural schematic diagram of the utility model embodiment 1, blood-collecting needle tube tip sleeve cladding；

Fig. 4 A: the schematic perspective view of the utility model embodiment 2；

Fig. 4 B: the whole cutting structural schematic diagram of the utility model embodiment 2, spring are unfolded；

Fig. 4 C: the whole cutting structural schematic diagram of the utility model embodiment 2, spring-compressed；

Fig. 4 D: the use process status diagram of the utility model embodiment 2, two casing seat handles separate；

Fig. 5 A: the schematic perspective view of the utility model embodiment 3, the compression of arch elasticity part；

Fig. 5 B: the schematic perspective view of the utility model embodiment 3, arch elasticity part unfolds, hinders and is sold back to a grain-producing area slide-in and adopts Pin hole on blood needle tubing seat；

Fig. 6 A: the local cutting schematic perspective view of the utility model embodiment 4, spring-compressed, windowed regions conveying Hose, which is pressurized, to be recessed；

Fig. 6 B: the local cutting schematic perspective view of the utility model embodiment 4, windowed regions delivery hose restore；

Fig. 6 C: the local cutting schematic perspective view of the utility model embodiment 4, spring are unfolded；

Fig. 6 D: the local cutting schematic perspective view of the utility model embodiment 4, spring-compressed, the rotation of casing seat handle Shaft；

Fig. 7: the stereochemical structure and partial enlargement diagram of the utility model embodiment 5；

Fig. 8 A: the schematic perspective view of the utility model embodiment 6；

Fig. 8 B: the local cutting structural schematic diagram of the utility model embodiment 6；

Fig. 9 A: the schematic perspective view of the utility model embodiment 7；

Fig. 9 B: the amagnified partial perspective structure at the blood taking needle tube socket embeded slot radial opening of the utility model embodiment 7 Schematic diagram；

Fig. 9 C: the part the M partial enlargement diagram in Fig. 9 A of the utility model embodiment 7；

Fig. 9 D: the use process status diagram of the utility model embodiment 7, independent blood taking needle tube socket handle is from blood sampling It is removed on needle tubing seat；

Fig. 9 E: the use process status diagram of the utility model embodiment 7, blood taking needle tube socket are fixed by tape-stripping；

Figure 10 A: the stereoscopic-state schematic diagram of the utility model embodiment 8；

Figure 10 B: the use process status diagram of the utility model embodiment 8, blood taking needle tube socket are fixed by tape-stripping；

Figure 11 A: the schematic perspective view of the utility model embodiment 9, spring are unfolded；

Figure 11 B: the use process status diagram of the utility model embodiment 9, spring-compressed；

Figure 11 C: the direction the E-E entirety cutting structural schematic diagram along Figure 11 B of the utility model embodiment 9；

Figure 12 A: the schematic perspective view of the utility model embodiment 10, spring-compressed；

Figure 12 B: the schematic perspective view of the utility model embodiment 10, spring are unfolded；

Figure 13 A: the local cutting structural schematic diagram of the utility model embodiment 11, penetrate blood hose be located at send in blood needle tubing；

Figure 13 B: the local cutting structural schematic diagram of the utility model embodiment 11 is penetrated blood hose a part and is leant out and send blood needle Pipe；

Figure 14: the local cutting structural schematic diagram of the utility model embodiment 12；

Figure 15: the local cutting structural schematic diagram of the utility model embodiment 13；

Figure 16: the local cutting structural schematic diagram of the utility model embodiment 14；

Figure 17 A: the local cutting structural schematic diagram of the utility model embodiment 15；

Figure 17 B: the local cutting structural schematic diagram of the utility model embodiment 15；

In figure: S. skin surface；S1. subcutaneous tissue；S0. skin degerming region；T. thumb；F. index finger；V. vein；V0. Vein lumen；V1. side wall of vein；V2. opposite side wall of vein；Vv. venous valve；W1. blood taking needle tube socket blood back peep hole；W2. it adopts The windowed regions of blood needle tubing seat upper end；W3. the windowed regions of blood taking needle tube socket side；L1. the central axes of blood-collecting needle tube and casing； L2. the vertical projecting line of blood-collecting needle tube on the skin；L3. the sleeve ring week region being socketed with blood-collecting needle tube sealing；R1. complete Red blood cell；R2；Red cell debris；P. resistance is sold back to a grain-producing area；A. adhesive tape；1. vein blood taking needle；11. blood-collecting needle tube；In 110 blood-collecting needle tubes Chamber；111. blood-collecting needle tube tip；112. blood-collecting needle tube pin hole；1121. pin hole inward flange；1122. pin hole outer edge；113. casing Blood-collecting needle tube between seat and blood taking needle tube socket；114. blood-collecting needle tube bottom part；115 blood-collecting needle tube outer surfaces；116. blood sampling Needle tubing blood back peep hole；12. blood taking needle tube socket；120. blood taking needle tube socket inner cavity；121. blood taking needle tube socket top end face；1211. from The limited post that blood taking needle tube socket top end face extends；The head that 1212. limited posts expand；122. blood taking needle tube socket upper surface； 1221. blood taking needle tube socket embeded slots；1222. embeded slot top adjacent surfaces；1223. embeded slot bottom end adjacent surfaces；1224. embeded slot Axially open；1225. embeded slot radial opening；123. blood taking needle tube socket lower end surface；124. blood taking needle tube socket side；1241. adopting The sheet wing that blood needle tubing seat side is extended；125. the groove of blood taking needle tube socket side；126. blood taking needle tube socket lateral grooves Top end face；127. the pin hole of blood taking needle tube socket upper surface；128. the top end face of windowed regions W2；The bottom of 1281. windowed regions W2 End face；129. blood taking needle tube socket bottom face；13. delivery hose；130. delivery hose inner cavity；131. being pressed in windowed regions W2 Delivery hose part；132. from by the delivery hose part of indentation state restoration in windowed regions W2；14. casing；140. set Tube cavity；141. cannula tip；142. casing shoe；143. internal surface of casing；144. cannula tips opening；15. casing seat； 150. casing seat inner hollows；151. casing seat top end faces；152. casing seat bottom faces；153. casing seat upper ends；154. casing Seat side；The through hole on 155. perforation casing seat tops and bottom end；16. casing seat handle；Casing seat hand in 16a. embodiment 1 Handle main body；Casing seat handle main body in 16b. embodiment 2；Casing seat handle main body in 16c. embodiment 3；16d. embodiment 4, the casing seat handle main body in 6；Casing seat handle main body in 16e. embodiment 9；161. casing seat handle medial surfaces； 162. casing seat handle lateral surfaces；The Weak link part of 163. casing seat handle main bodies；The rotation of 164. casing seat handle main bodies Axis；17. casing seat handle contact part；17a, 17b, 17c, 17d, 17e. casing seat handle 16a, 16b, 16c, 16d, 16e's Contact portion；Retention bead on 171. contact portion 17b；The top end face of 172. retention beads；On 173. contact portion 17b Resistance return protrusion；174. hinder back the inclined adjacent surface of protrusion；175. hinder back the vertical bottom face outstanding of protrusion；176. set Through hole on the contact portion 17c of tube socket handle 16c；The inner surface of 177. contact portions；The outer surface of 178. contact portions； The sheet of the outer surface of 1781. contact portions is prominent；The 179. pressing protrusions extended from contact portion inner surface；1791. pressing The front end face that belling rises；18. elasticity part；18a. compressed spring；18b. arch elasticity part；19. blood taking needle tube socket handle； The removable blood taking needle tube socket handle of 19a.；The vertical-type needle tubing seat handle of 19b. and blood taking needle tube socket Weak link；19c. blade Shape horizontal type needle tubing seat handle；Blood taking needle tube socket handle on the right side of 19c1.；Blood taking needle tube socket handle on the left of 19c2.；191. blood taking needle The bottom upper surface of tube socket handle 19a；The bottom lower end surface of 192. blood taking needle tube socket handle 19a；193. blood taking needle tube socket handles Longitudinal Weak link part of 19b；21. sending blood needle tubing；210. send blood syringe intracavity；211. send blood needle tubing tip；212. send blood needle The pin hole at tip end；2121. pin hole inward flange；213. sides are to pin hole；2131. sides are to pin hole rough edge；22. sending blood needle Tube socket；The socket of 221a. square；The socket of 221b. high order smooth pattern；222. hold needle guard；23. gum cover；24. penetrating blood hose；241. penetrating Blood hose leans out part；242. lean out the end of part；2411. lean out the vertical opening of the end of part；2412. leaning out part End lateral openings；2413. penetrate blood hose lateral openings corresponding with lateral pin hole；3. vacuum blood collection tube；31. vacuum The tube body of heparin tube；310. vacuum blood collection tube cavities；32. rubber plug；33. pipe lid；312. tube body bottom ends；324. rubber plugs recess.

Specific embodiment

Limitation the embodiments of the present invention are not as follows:

Illustrate existing vein blood taking needle operating process first, it is as shown in Figure 1A, left after point of puncture skin S0 disinfection nearby Hand taught skin, hand thumb T is in upper index finger F in lower 19 (clinic shown in Figure 1B existing one of holding blood taking needle tube socket handle Kind of the vein blood taking needle without handle, what finger directly held hard holds needle guard 222), opaque blood-collecting needle tube 11 and skin table Face S α inserting needle at an angle, angle [alpha] be blood-collecting needle tube 11 central axes L1 and blood-collecting needle tube 11 skin surface S upright projection The correct selection of angle between line L2, needle angle α decides whether puncture succeeds to a certain extent, however is located at blood taking needle Index finger F between tube socket 12 and skin surface S is not only easy this selection of skin but also the severe jamming that pollution has sterilized, especially It is when need to select lesser needle angle, moreover, needing to turn down blood-collecting needle tube at any time during inserting needle namely reducing inserting needle angle α is spent to guarantee blood-collecting needle tube tip 111 in the center of vein official jargon V0, and this improper position being clipped in the middle of index finger F is serious The operation for interfering this needle angle α that may reduce at any time, reduces puncture success rate；Inserting needle process is as shown in Figure 2 A, adopts Blood needle tubing tip 111 punctures skin surface S and breaks through nearest side wall of vein V1 by subcutaneous tissue S1, at this time pin hole 112 Part is located in vein lumen V0, and intravenous pressure forces blood into blood-collecting needle tube and delivery hose 13, in blood-collecting needle tube Red can be observed on the transparent or semitransparent blood back peep hole W1 of seat 12 and on transparent or semitransparent delivery hose 13 Or the blood back of kermesinus；It observes after blood back to ensure that pin hole 112 is fully located in vein lumen V0, blood-collecting needle tube need to be turned down 11 namely reduction needle angle α continues a distance that inserting needle is usually several millimeters；If vein lumen V0 is compared with thin, vein is significant Bending, when needle angle α is bad, operator is unskilled easily in this procedure failure, there is blood sampling as shown in Figure 2 B Opposite side wall of vein V2 is run through at the sharp tip 111 of needle tubing 11, punctures utter failure；For another example when there is blood-collecting needle tube 11 shown in Fig. 2 C Sharp tip 111 is close to the situation of venous valve Vv, and when pin hole 112 is attached on venous valve Vv, blood back is difficult to occur, also Though a kind of situation is that the sharp tip 111 of blood-collecting needle tube has penetrated that venous valve Vv does not penetrate vein but blood back will not occur, for another example The pin hole 112 on the inclined-plane at the sharp tip 111 of blood-collecting needle tube shown in Fig. 2 E is close to the situation of wall of vein inner membrance, and Fig. 2 D is by inclined-plane The amplification signal of pin hole 112, these situations operator would generally judge that pin hole 112 not yet enters vein lumen V0, continue inserting needle Until running through the final puncture failure of vein V.

And when puncturing successfully, it is intracavitary that the sharp tip 111 of blood-collecting needle tube 11 as shown in Figure 2 F is located at duct of Arantius, immediately such as figure Blood needle tubing 21 will be sent to be pierced into vacuum blood collection tube cavity 310 shown in 1C, in vacuum suction blood from the pin hole of blood-collecting needle tube 11 Flow rapidly into 11 inner cavity 110 of blood-collecting needle tube, as shown in Figure 2 G, the blood blood-collecting needle tube sharp, coarse from microscopic dimensions lower surface The each radial angle fast turbulent shape of pinhole edges flow through pin hole outer edge 1122, inward flange 1121 and be inhaled into blood-collecting needle tube Chamber, part cell in blood flow can quick washings or by sharp, the coarse outer edge 1122 of blood-collecting needle tube pin hole, inward flange 1121, high-speed friction and dissection that sharpened edge generates will lead to the destruction of a large amount of haemocytes especially red blood cell, figure Complete red blood cell R1 shown in 2G becomes broken after flowing through the outer edge 1122 that blood-collecting needle tube pin hole is sharp, coarse, inward flange 1121 Piece R2, arrow show blood flow route in figure；The other side is as shown in Figure 1 C, when holding send blood needle tubing seat 22 that will send blood needle tubing 21 When being pierced into from the recess 324 of vacuum blood collection tube rubber plug 32, gum cover 23 is stacked by compression, and blood needle tubing tip 211 is sent to enter vacuum Blood sampling tube cavity 310, the pin hole 212 for sending blood needle tubing tip that blood surface rigid equally under microscopic dimensions is sharp, coarse Edge is mainly same high-speed friction and to cut 310 when 2121 fast turbulent spurting of inward flange flows into vacuum blood collection tube cavity The effect of cutting will lead to the destruction of a large amount of haemocytes especially red blood cell, and more significant haemolysis occurs；It is blood flow shown in dotted line, Flow to tube body bottom end 312.

It, can be because various without the sharp tip 111 of the blood-collecting needle tube 11 of the protection of casing 14 during Blood specimen collection Reason includes limb activity caused by muscle cramp, cough, restless etc. and is subjected to displacement, and easily Fig. 2 B institute occurs through vein V The situation shown.

Embodiment 1:

As shown in Fig. 3 A, Fig. 3 B, the embodiment of the present invention 1 includes: one for puncturing in the having of skin and wall of vein The blood-collecting needle tube 11 of empty inner cavity 110, usually selection metal material；One the medical resin that blood-collecting needle tube 11 is fixed in it is made Cylindrical hollow blood taking needle tube socket 12, the inner surface of blood taking needle tube socket inner cavity 120, which firmly seals, has been socketed blood-collecting needle tube The outer surface of bottom part 114；13 outer surface of delivery hose made of medical resin by with 12 inner cavity 120 of blood taking needle tube socket Surface firmly seals bonding and is connected to its inner cavity 130 with blood-collecting needle tube inner cavity 110；11 outer surface 115 of blood-collecting needle tube is arranged Casing 14 flexible made of one medical resin, 14 top 141 of casing as shown in Figure 3B have coated sharp blood-collecting needle tube tip 111, the casing shoe 142 close to 12 side of blood taking needle tube socket is connected with casing seat 15 made of the medical resin of inner hollow, set The partial outer face at tube bottom end 142 and the surface of 15 hollow space of casing seat are bonded as one, and can also first be put into casing and be used for Forming in the mold cavity of casing seat is linked together the two casing seat injection molding；Casing seat 15 is set in blood-collecting needle tube 11 Outside, the diameter of inner hollow is not less than blood-collecting needle tube outer diameter；Casing seat 15, which is connected with a part, may extend to 12nd area of blood taking needle tube socket The casing seat handle 16 in domain, casing seat handle 16 originally can also be independent component and set as a part of casing seat 15 Tube socket 15 is linked together, and the casing seat handle 16a of the present embodiment is originate from 15 upper surface of casing seat one to blood-collecting needle tube The extension in 12 directions of seat, main body are in thin rod shape, and the contact portion 17a in 12 region of blood taking needle tube socket is roomy compared with main body to be in The arc thin slice consistent with cylindrical 12 top end surface shape of blood taking needle tube socket is mainly that thumb T presses it convenient for finger Press operation；The contact portion 17a of casing seat handle can be configured as not having with 12 upper surface of blood taking needle tube socket there are small gap There is gap but can slide on；One is equipped between 15 bottom face 152 of casing seat and blood taking needle tube socket top end face face 121 by outer Power can occur compressive deformation metal or nonmetallic materials made of compressed spring 18a, compressed spring 18a is set in casing seat 15 On blood-collecting needle tube 113 between blood taking needle tube socket 12；It is fixed when blood taking needle tube socket 12 is held by the finger of proficiency, the other hand The top end face 151 of finger pressing casing seat makes it towards close to the movement of the direction of blood taking needle tube socket 12, and casing 14 is by related synchronization Movement exposes blood-collecting needle tube tip 111 from the cladding of cannula tip 141, is clipped between casing seat 15 and blood taking needle tube socket 12 Compressed spring 18a elastic potential energy is stored by compression, state is as shown in Figure 3A, and the index finger F of proficiency is located at blood taking needle when use Casing seat handle contact part 17a is pressed to and is in close contact blood taking needle tube socket upper surface 122 by tube socket lower end surface 123, thumb T, Generating enough frictional force makes casing seat 15 will not be due to the elastic recovering force of compressed spring to 111 1 sidesway of blood-collecting needle tube tip It is dynamic；State as shown in Figure 3A is exposed from cannula tip 141 in blood-collecting needle tube tip 111, immediately to venipuncture, fits after seeing blood back Degree loosens the clamping dynamics between index finger F and thumb T, makes casing seat handle contact part 17a and blood taking needle tube socket upper surface 122 Between frictional force be less than the elastic recovering force of compressed spring 18a, casing seat 15 is mobile to 111 side of blood-collecting needle tube tip, casing Top 141 has coated blood-collecting needle tube tip 111, and the clamping dynamics increased between index finger F and thumb T at this time adjusts needle angle α continues several millimeters of inserting needle, this process for continuing inserting needle is to be coated at blood-collecting needle tube tip 111 by cannula tip 141 flexible On the basis of carry out, will not pierce through opposite side wall of vein V2 as shown in Figure 2 B, ensure the success punctured to the full extent；Also simultaneously The risk of vein is run through at blood-collecting needle tube tip 111 caused by any limb activity during reducing blood sampling.

When the present embodiment is designed to casing seat handle contact part 17a and the close contact of blood taking needle tube socket upper surface 122 When, without finger intervene, compressed spring 18a by compressed elastic recovering force should be greater than casing seat handle contact part 17a with Frictional force between blood taking needle tube socket upper surface 122.

To reduce resistance when puncturing, it is designed to the axis towards blood-collecting needle tube or casing at cannula tip opening 144 The taper of line L1 tightening, this shape are convenient for that cannula tip 141 and blood-collecting needle tube tip 111 is made to be pierced into skin and vein together.

Because blood-collecting needle tube 11 is sheathed in 14 inner cavity 140 of casing, internal surface of casing 143 and blood-collecting needle tube outer surface 115 Between preferably there are gap, resistance is minimum when the two relatively moves, but both at least one ring week region L3 are the sockets of sealing Without flowing out blood from gap between the two；The outflow refers to a part of blood-collecting needle tube 11 and casing 14 during blood sampling It can expose in vitro, because vein lumen V0 has the positive pressure higher than atmospheric pressure, the gap of the two by ring week if not being sealed with Blood may be made to flow out in vitro from this gap because of the presence of pressure difference；The socket of the sealing refers to the set of ring week region L3 Tube portion inner surface 143, which is at least, looped is also possible to the close with the outer surface 115 of the position blood-collecting needle tube of ring-band shape Contact, i.e., the casing at this has certain pressure inwardly wrapped up to blood-collecting needle tube outer surface 115；It is described inwardly to refer to that direction is adopted The central axes L1 of blood needle tubing or casing.

In blood collection procedure, shown in the amplification of the B blood-collecting needle tube tip position Fig. 3, blood axial laminar flow shape stream in the direction of the arrow Enter cannula tip opening 144, and 144 edge of ferrule openings flexible significantly reduces the destruction of red blood cell etc., reduces Hemolysis rate.

Embodiment 2:

As shown in Figure 4 A, the present embodiment casing seat handle 16 is to extend from casing seat side 154 unlike the first embodiment The contact portion 17b of left and right two handle 16b, handle 16b out are located at the side 124 of blood taking needle tube socket；Shown in Fig. 4 B, blood sampling Two sides 124 of needle tubing seat are equipped with axially expanded groove 125, and the contact portion 17b of handle 16b is prominent into groove 125 A part is that retention bead 171 is used as limiting component, and the sliding that retention bead 171 can be axial in groove 125 is until limit convex The top end face 172 and the top end face 126 of groove 125 for playing 171 offset, to limit casing seat handle 16b to blood taking needle tip Hold the movement in 111 directions.

Because being provided with the two casing seat handle 16b in left and right, thumb T and index finger F is respectively pressed against itself and blood-collecting needle tube when use Two contact portion 17b of seat side 124 are allowed to carry out puncture procedure, blood taking needle tube socket with 12 synchronizing moving of blood taking needle tube socket Lower end surface 123 can not contacted with skin degerming region S0 substantially, utmostly reduce point of puncture by the risk of finger pollution；Simultaneously Interference of the index finger F to correct selection needle angle α in embodiment 1 between blood taking needle tube socket 12 and skin surface S is also eliminated, Improve puncture success rate.

Further, as shown in Figure 4 C, each contact portion 17b of two casing seat handle 16b is prominent to groove 125 It further include hindering back protrusion 173 in addition to retention bead 171, hindering back protrusion 173 has an inclined adjacent surface 174 and one vertical outstanding Bottom face 175, hindering back protrusion 173 can slide in groove 125, when compressed spring 18a state restoration makes tube socket handle 16b's When contact portion 17b is mobile to 111 direction of blood-collecting needle tube tip, the top end face 126 of groove 125 can not prevent to hinder back protrusion 173 Inclined adjacent surface 174, hinder back protrusion and 173 skidded off out of groove 125, finally hinder back 173 vertical bottom faces outstanding of protrusion 175 offset with blood taking needle tube socket top end face 121, make casing seat 15 outside by the axis far from 111 direction of blood-collecting needle tube tip It is immovable when power, namely prevent to have coated 14 reversion of casing at blood-collecting needle tube tip 111, it is ensured that blood-collecting needle tube tip 111 It persistently is reduced because limb activity runs through the risk of vein V by the cladding of cannula tip 141 during blood sampling.

It is blood back peep hole 116 that the tube body upper wall of blood-collecting needle tube 11, which opens up a through-hole, such as Fig. 4 A, at least in blood back peep hole The part of casing 14 near 116 is visually observed to be transparent or semitransparent with convenient, and usually entire casing selects transparent material Matter formula；Because blood back peep hole 116 be opened on blood-collecting needle tube 11 it is closer apart from vein lumen V0, under same vein pressure compared with Close position is easier blood back occur, facilitates operator and promptly and accurately judges whether pin hole 112 has entered vein lumen V0；With Casing 14 between the corresponding position of blood back peep hole 116 of blood-collecting needle tube 11 and casing seat top end face 151 is equipped with ring week Region L3, internal surface of casing 143 is the contact sealed, the sealing with blood-collecting needle tube outer surface 115 on this ring week region L3 Contact or the socket of sealing refer to that the blood in blood collection procedure medium sized vein lumen V0 cannot pass through from this region, including the two nothing The contact for having pressure in gap, the contact of gapless no pressure, having even allowed for small gap because of blood is several times even number The viscosity of water is decupled, biggish surface tension can prevent blood from passing through from lesser gap.

When beginning to use, two casing seat handles are first separated as shown in Figure 4 D, and pressing casing seat top end face 151 immediately makes bullet Spring 18a compression, blood-collecting needle tube tip 111 are exposed from cannula tip 141, and thumb T and index finger F are respectively pressed against casing seat handle 16b With two contact portion 17b of blood taking needle tube socket side 124, it is allowed to carry out puncture procedure with 12 synchronizing moving of blood taking needle tube socket.

Embodiment 3:

As shown in Figure 5A, dramatically different with previous embodiment, embodiment 3 is located at casing seat 15 and blood taking needle tube socket 12 Between elasticity part 18 be arch elasticity part 18b, each one of left and right, by from casing seat top end face 151 axial direction pressure Arcuate main body deformation and energy storage outward after power；The contact portion 17c of the handle 16c extended from casing seat upper end 153 is equipped with Through hole 176 is inside cased with resistance and is sold back to a grain-producing area P, and resistance is sold back to a grain-producing area P main body and is in the form of a column and can slide up and down in through hole 176；In blood-collecting needle tube Seat upper surface 122 is equipped with pin hole 127, and the contact portion 17c of casing seat handle 16c can be on blood taking needle tube socket upper surface 122 Axial movement；As shown in Figure 5 B, when the pin hole on P face blood taking needle tube socket upper surface 122 is sold back to a grain-producing area in the resistance for being set in through hole 176 When 127, resistance is sold back to a grain-producing area P and can crash into or enter in pin hole 127 through pressing to prevent casing seat handle 16c from backing towards movement.

Embodiment 4:

In order in puncture process, once the blood-collecting needle tube tip 111 with pin hole 112 enter vein lumen V0 can the One time saw blood back, and for the present embodiment as shown in Fig. 6 A, Fig. 6 B, blood taking needle tube socket upper surface is equipped with opening for local material missing Window region W2 is directly exposed between windowed regions W2 top end face 128 and bottom face 1281 positioned at blood taking needle tube socket inner cavity 120 a part of delivery hose 132；Between the casing seat handle 16d that casing seat upper end 153 is extended and contact portion 17d For the connection that can be rotated up and down, it is described be rotated up and down refer to and be close to blood taking needle tube socket upper surface 122 under, it is separate then be upper； The structure being rotated up and down as shown in Figure 6A is the Weak link of the lateral local wall thickness reduction in casing seat handle 16d main body Part 163；Fig. 6 D then shows another structure that can be rotated up and down, the casing seat handle 16d mediated with rotary shaft 164 with connect Contact portion divides the connection being rotated up and down between 17d.

The inner surface 177 of the contact portion 17d opposite direction blood taking needle tube socket windowed regions W2 of casing seat handle 16d extends one Pressing protrusion 179, when compressed spring 18a is compressed when use, blood-collecting needle tube tip 111 is exposed, and thumb T is from contact portion 17d When outer surface 178 presses, contact portion 17d, which is rotated down with lateral Weak link part 163 for axis, pushes pressing protrusion 179 By 132 indentation formation of delivery hose in windowed regions W2, by the gas in the delivery hose 131 of indentation formation from pin hole 112 Blood-collecting needle tube 11 is flowed out, when pin hole 112 partly or entirely enters vein lumen V0 with puncture process, usual operator has prominent It is broken to feel, thumb T is artificially reduced at this time to the pressing dynamics of contact portion 17d, makes delivery hose 132 because of natural resiliency recuperability It is all or part of to restore from etat lacunaire as shown in Figure 6B, from the delivery hose 131 pressed to 132 state of delivery hose It restores the negative pressure suction force generated and blood is actively attracted to blood-collecting needle tube inner cavity out of vein lumen V0 by the space released 110 even delivery hose inner cavities 130, are closely located to the blood back peep hole 116 at blood-collecting needle tube tip 111 in addition, can be the One time found blood back in time, this is the sensitive blood-return of active；Further loosen thumb T immediately after seeing blood back, completely eliminates Or partially remove the frictional force pressed between protrusion 179 and delivery hose 132, the elastic recovering force actuating sleeve of compressed spring 18a The axial movement of tube socket 15 makes cannula tip 141 coat blood-collecting needle tube tip 111, at this time the front end face 1791 of pressing protrusion 179 It offsets as shown in Figure 6 C with the top end face 128 of windowed regions W2, the position-limiting action of generation prevents casing 14 from continuing to adopt to separate The direction of blood needle tubing seat 12 continues to move axially, and position-limiting action is counteracted to be produced because of the elastic recovery power drive of compressed spring 18a Over-travel caused by the movement speed and maloperation of raw casing seat 15.

Further, thumb T continues to be pressed into contact with several millimeters of inserting needle of part 17d continuation, it is ensured that pin hole 112 is fully located at vein In lumen V0, this process very likely touches wall of vein V1 or V2, but due to soft cannula tip 141 coated it is sharp Blood-collecting needle tube tip 111 causes the risk of puncture failure to be completely eliminated or be preferably minimized through wall of vein V1 or V2.

Embodiment 5:

As shown in fig. 7, blood taking needle tube socket top end face 121 is axially extending out embodiment shows another position limiting structure One rod-shaped limited post 1211, preferred cross-sections are circle；15 main body of casing seat is equipped with through top end face 151 and bottom face 152 Through hole 155, limited post 1211 pass through through hole 155, and the part across the limited post 1211 of through hole 155 is the head expanded 1212, described expand refers to that its outer diameter is greater than 155 internal diameter of through hole, and when elasticity part 18a is in reset condition, limited post is swollen Big head 1212 offsets with casing seat top end face 151, limits it and further moves to the axial direction in 111 direction of blood-collecting needle tube tip It is dynamic.

Embodiment 6:

It as shown in Figure 8 A, is that the 18 compressed spring 18a of elasticity part of the present embodiment is sheathed on limit with the difference of embodiment 5 On column 1211, the compressed spring 18a for avoiding hard during taking a blood sample may be to the compression of skin surface；With in embodiment 4 The windowed regions W2 of identical casing seat handle 16d contact portion 17d and blood taking needle tube socket；It further include in the same manner as in Example 4 Resistance return component and hinder back raised 173；Shown in Fig. 8 B, for along the local cutting structural representation of the central axial cutting of limited post 1211 Figure.

Embodiment 7:

As shown in Figure 9 A, in order to thoroughly avoid in puncture procedure finger clamp between blood taking needle tube socket 12 and skin surface S Caused by a variety of above-mentioned drawbacks, the invention also includes convenient for finger hold blood taking needle tube socket handle 19, the present embodiment show A kind of removable main body is in foliated blood taking needle tube socket handle 19a, and blood taking needle tube socket handle 19a is connect with blood taking needle tube socket Bottom in the inverted T shaped strip in section, the bottom blood taking needle tube socket handle 19a integrally be embedded in positioned at blood taking needle tube socket upper surface 122 Embeded slot 1221 in, the hollow section of embeded slot 1221 in it is corresponding with the blood taking needle tube socket bottom section handle 19a fall T Type, embeded slot 1221 have the axially open 1224 and radial T positioned at blood taking needle tube socket upper surface 122 of an axial strip The radial opening 1225 positioned at blood taking needle tube socket bottom face 129 of type, the bottom of blood taking needle tube socket handle 19a is from embeded slot 1221 The radial opening 1225 of blood taking needle tube socket bottom face 129 is inserted in embeded slot 1221.

For the sensitive blood-return of active, windowed regions W3, clamping blood sampling are equipped on two sides 124 of blood taking needle tube socket The finger of needle tubing seat handle 19a can directly oppress the delivery hose 132 of exposure in windowed regions W3；In order to see simultaneously Blood was collected in time when blood back, and the cladding of needle tubing tip 111 avoids continuing through vein V in inserting needle, and the present embodiment uses and implementation It is negative to oppress the generation of delivery hose 132 using the pressing protrusion 179 on contact portion 17b by the identical casing seat handle 16b of example 2 Pressure.

Fig. 9 B show the amagnified partial perspective structural schematic diagram at the embeded slot radial opening of Fig. 9 A.

Thumb T index finger F clamps blood taking needle tube socket handle 19a and upper drawings power, as shown in Figure 9 C, blood taking needle tube socket when operation The bottom handle 19a lower end surface 192 is separated with embeded slot bottom end adjacent surface 1223 or active force reduces therebetween, blood-collecting needle tube The seat bottom handle 19a upper surface 191 and embeded slot top adjacent surface 1222 are in close contact, while finger is pressed to positioned at blood-collecting needle tube The casing seat contact portion 17b of seat side 124, oppressing delivery hose 132 by pressing protrusion 179 makes its recess, continues thereafter with Carry out process above-mentioned.

After puncturing successfully, blood taking needle tube socket handle 19a is extracted to removal from embeded slot 1221 as shown in fig. 9d.

In order to preferably fix blood taking needle tube socket 12 in blood collection procedure, the sheet wing is extended in blood taking needle tube socket side 124 1241, contact area is increased, conducive to being adhered fixed for adhesive tape A, such as Fig. 9 E.

Embodiment 8:

Solved the problems, such as with embodiment 7 it is similar, as shown in Figure 10 A, the vertical-type needle tubing seat with blood taking needle tube socket Weak link Handle 19b is located at blood taking needle tube socket upper surface 122, and when puncture can play the role of in embodiment 7 handle 19a similarly, but puncture After adhesive tape A fixation state that its need to be made as shown in Figure 10 B, needle tubing seat handle 19b and blood taking needle tube socket upper surface 122 It is connected as the connection that can be rotated left and right, the left rotation and right rotation refers to that using blood-collecting needle tube central axes L1 be rotary shaft to blood-collecting needle tube The rotation in seat 124 direction of side, the present embodiment show the weak company reduced with 122 part local wall thickness of blood taking needle tube socket upper surface The needle tubing seat handle 19b for connecing 193, can be swung to after puncture blood taking needle tube socket 12 side and skin surface S contact and by Adhesive tape A's is adhered fixed.

Embodiment 9:

As shown in Figure 11 A, the present embodiment is unlike embodiment 4 and 8, and blood taking needle tube socket side 124 sets that there are two leaves Flake handle 19c, right side blood taking needle tube socket handle 19c1, left side blood taking needle tube socket handle 19c2；The contact of casing seat handle 16e Part 17e is located on blood taking needle tube socket upper surface 122, has an axial sheet prominent on the outer surface contact portion 17e 178 1781, the biggish axial sheet prominent 1781 of area helps to be pressed from both sides by blood taking needle tube socket handle 19c1,19c2 of centripetal folding It holds, the centripetal folding refers to the folding towards blood taking needle tube socket upper surface 122 using blood-collecting needle tube central axes L1 as axis.

As shown in Figure 11 B when operation, thumb T index finger F clamps blood taking needle tube socket handle 19c1,19c2 relatively firmly, makes position The sheet of the contact portion 17e of casing seat handle 16e in the inner prominent 1781 is clamped, can be with blood taking needle tube socket handle 19c1,19c2 synchronizing moving；Thumb T index finger F, which clamps blood taking needle tube socket handle 19c1,19c2 and generates downward component, to be applied to The contact portion 17e of casing seat handle 16e keeps the pressing protrusion 179 on its inner surface 177 that the conveying in windowed regions W2 is soft Pipe 132 presses, and the opposing clamping forces for reducing thumb T and index finger F can make to lift in the pressing protrusion 179 in windowed regions W2, makes recessed Sunken delivery hose 131 triggers sensitive blood-return during elastic recovery, continue thereafter with gripping sleeve tube socket handle 19c1,19c2 and The contact portion 17e of casing seat handle 16e in it completes the aforementioned process for continuing inserting needle.Figure 11 C show Figure 11 B along E- The whole cutting structural schematic diagram in the direction E.

Implement 10:

As shown in Figure 12 A, Figure 12 B, right side blood taking needle tube socket handle 19c1, and the contact portion 17f of casing seat handle 16f In foliaceous radially projecting to the right, convenient for press contacts under thumb T when operation, and index finger F is located at blood taking needle tube socket handle Below 19c1；This design uses foliated two kinds of handle horizontal directions overlapping, and finger contact area meets greatly clinic one Fixed number amount nursing staff's operating habit；Reduce the clamping force between thumb T and index finger F in puncture process, windowed regions W2 can be made Interior pressing protrusion 179 is lifted up, and 132 recovery of shape of delivery hose of indentation triggers sensitive blood-return, is continued thereafter in clamping The handle of lower overlapping completes the aforementioned process for continuing inserting needle.

Implement 11:

Such as Figure 13 A, 13B, in order to reduce the hemolysis rate during sending blood needle tubing 21 to send blood to vacuum blood collection tube cavity 310, Further include penetrating blood hose 24, penetrate a part of blood hose 24 and be located at and send blood needle tubing 21 inner cavity 210, a part is from sending blood needle tubing 21 tip Leant out in 211 pin hole 212, penetrate blood hose 24 lean out part 241 end 242 be equipped with a vertical opening 2411, it is soft to penetrate blood Pipe 24 can be made by flexible material such as silicon rubber, thermoplastic elastomer (TPE) etc., with metal material production send blood needle tubing 21 compared with, when When blood is penetrated 2411 spurting of vertical opening flexible of blood hose 24 inflow vacuum blood collection tube cavity 310, keep away to the greatest extent Having exempted from the blood needle tubing pinhole edges that send that rigid surface under microscopic dimensions is sharp, coarse is mainly 2121 fast turbulent of inward flange 310 haemolysis occurred when spurting flows into vacuum blood collection tube cavity；Blood hose flexible of penetrating is when the material very low using shore hardness When material, when as even lower such as 10-30 degree or so, it is expansible that blood penetrates 2411 part of vertical opening flexible of blood hose 24 when spraying Further buffering is played in deformation, and the opening of blood hose 24 2411 is penetrated under expansion state can be such that blood flow velocity further decreases to drop The haemolysis that low high-speed friction generates；Arrow show blood flow direction in Figure 13 B.

Embodiment 12:

As shown in figure 14, in order to further increase the gross area for penetrating the opening of blood hose 24, blood flow velocity is reduced, to reduce Hemolysis rate penetrates blood hose 24 and leans out the end 242 of part 241 equipped with a vertical opening 2411 and at least one lateral openings 2412, arrow show blood flow direction in figure.

Embodiment 13:

As shown in figure 15, it is different that the embodiment of blood hose 24 is penetrated from aforementioned setting, in order to avoid the injection of vertical opening 2411 The longer possible haemolysis aggravated of blood range, penetrating blood hose 24 and leaning out the end 242 of part 241 is cecum, penetrates blood hose 24 End 242 be equipped at least one lateral openings 2412, arrow show blood flow direction in figure.

Embodiment 14:

As shown in figure 16, in order to avoid vertical send the molten of the longer possible exacerbation of the blood needle tubing blood range that opening projects Blood, sending 21 tip 211 of blood needle tubing is cecum, and the pin hole of blood outflow is lateral pin hole 213, and lateral pin hole 213 is at least one, Arrow show blood flow direction in figure.

Embodiment 15:

As shown in Figure 17 A, hemolysis rate during another reduction send blood needle tubing 21 to send blood to vacuum blood collection tube cavity 310 Integration scenario is to send 21 tip 211 of blood needle tubing for cecum, and the pin hole of blood outflow is lateral pin hole 213, penetrates blood hose 24 and is located at It send in 21 inner cavity 210 of blood needle tubing, penetrates blood hose 24 equipped with lateral openings 2413 corresponding with lateral pin hole 213；It is described opposite Should refer to, the two be positioned next to and center is overlapped, blood flows out directly from the lateral openings 2413 for penetrating blood hose 24 from sending blood The lateral pin hole 213 of needle tubing 21 enters in heparin tube 3, and without contacting lateral 213 edge of pin hole, it is thick to avoid lateral pin hole 213 Damage of the rough edge to blood cell；From another view the present embodiment, as seen in this fig. 17b, the side of blood hose 24 is penetrated It is less than the area of lateral pin hole 213 to the area of opening 2413, it is ensured that blood flow is not sent out with lateral 213 rough edge 2131 of pin hole Raw friction；In addition, to reduce blood in delivery hose 13 and the square socket place 221a direct collision of blood needle tubing seat 22 being sent to produce Raw turbulent flow, the present embodiment preferably soft gentle socket 221b, as seen in this fig. 17b；Similar gentle transition socket can also answer Socket for delivery hose 13 and blood taking needle tube socket 12.

Claims (25)

1. a kind of vein blood taking needle, comprising: a blood-collecting needle tube (11) for puncturing skin and wall of vein, one by blood taking needle Pipe (11) fix in it blood taking needle tube socket (12), one send blood needle tubing (21)；Send blood needle tubing (21) inner cavity (210) direct or logical Delivery hose (13) inner cavity (130) is crossed to be connected with blood taking needle tube socket (12) inner cavity (120)；Send conformal outside blood needle tubing (21) be arranged One gum cover (23), gum cover (23) will send blood needle tubing (21) to be isolated with external fluid；It is characterized in that, being arranged outside blood-collecting needle tube (11) One casing (14) flexible, cannula tip (141) has coated sharp blood-collecting needle tube (11) tip (111), close to blood-collecting needle tube The casing shoe (142) of seat (12) side is connected with the casing seat (15) of inner hollow (150), and casing seat (15) is set in blood taking needle Manage (11) outside, casing seat inner hollow (150) diameter is not less than blood-collecting needle tube (11) outer diameter；Casing seat (15) is connected with a part can The casing seat handle (16) in blood taking needle tube socket (12) region is extended to, casing seat handle (16) a part can be touched because of compression Blood taking needle tube socket (12) is casing seat handle contact part (17)；It is equipped at least between casing seat (15) and blood taking needle tube socket (12) One by the external force meeting elasticity part (18) that deformation occurs；When blood taking needle tube socket (12) is fixed, and external force is directly or indirectly led to It crosses casing seat handle (16) and is applied to casing seat (15) and drive it towards mobile close to the direction of blood taking needle tube socket (12), and force Elasticity part (18) connected to it deformation occurs storage elastic potential energy, blood-collecting needle tube (11) tip (111) is from coating its set Expose at tube top end (141)；Casing seat handle (16) is located at the casing seat handle in blood taking needle tube socket (12) region by operator's finger Contact portion (17) is fixed to blood taking needle tube socket (12) surface, restore elasticity part (18) cannot, blood-collecting needle tube (11) Tip (111) enter vein (V) after, reduce or release finger to the pressing force of casing seat handle (16) can make casing seat (15) because The elastic potential energy of elasticity part (18) discharges the elastic recovering force generated and is moved by the direction far from blood taking needle tube socket (12) is forced to It is dynamic, and soft cannula tip (141) is finally made to have coated sharp blood-collecting needle tube (11) tip (111)；Elasticity part (18) Elastic recovering force after deformation is greater than the frictional force between casing (14) inner surface and blood-collecting needle tube (11) outer surface；When sending blood needle When pipe (21) is connected by delivery hose (13) with blood taking needle tube socket (12), it is connected with one and send blood needle tubing seat (22), send blood needle tubing seat (22) blood needle tubing (21) are sent in one end connection delivery hose (13), other end connection.

2. a kind of vein blood taking needle according to claim 1, which is characterized in that there are two casing seat handles (16), and two Casing seat handle contact part (17) extends to the left and right sides of blood taking needle tube socket (12), and two finger forces can press simultaneously it To blood taking needle tube socket (12) surface.

3. a kind of vein blood taking needle according to claim 1, which is characterized in that elasticity part (18) is to be set to casing seat (15) compressed spring between blood taking needle tube socket (12).

4. a kind of vein blood taking needle according to claim 1, which is characterized in that further include limiting component, define casing The range of axially opposing displacement between seat (15) and blood taking needle tube socket (12).

5. a kind of vein blood taking needle according to claim 1, which is characterized in that at least one region on casing (14) in ring week It (L3) is the socket with the sealing of blood-collecting needle tube (11) outer surface without flowing out blood.

6. a kind of vein blood taking needle according to claim 1, which is characterized in that blood-collecting needle tube is provided at least one on (11) The blood back peep hole (116) being connected to blood-collecting needle tube (11) inner cavity (110)；Casing (14) be flexible and transparent, with blood-collecting needle tube (11) at least one is close with blood-collecting needle tube on the casing (14) between the corresponding position of blood back peep hole (116) and casing seat (15) The sleeve ring week region (L3) that big envelope connects is the socket with the sealing of blood-collecting needle tube (11) outer surface without flowing out blood.

7. a kind of vein blood taking needle according to claim 1, which is characterized in that blood taking needle tube socket (12) is equipped with a windowing area Domain (W2) exposes the delivery hose between windowed regions top end face (128) and bottom face (1281) being set in it (132)；Casing seat handle (16) position corresponding with windowed regions (W2), which is equipped with, to be pressed raised (179), pressing protrusion (179) it can be pressed downward forcing delivery hose (131) depressed deformation in windowed regions (W2).

8. a kind of vein blood taking needle according to claim 7, which is characterized in that casing seat handle (16) and casing seat (15) Between connection be including application rotary shaft (164) including the connection being rotated up and down, can casing seat (15) almost not by Casing seat handle (16) is done by axis of junction away from or approaching blood taking needle tube socket (12) upper surface (122) on the basis of interference It is rotated up and down；Upwards when rotation, the pressing raised (179) on casing seat handle (16) can get rid of windowed regions top end face (128) Limitation ot it.

9. a kind of vein blood taking needle according to claim 8, which is characterized in that casing seat handle (16) contact portion (17) Connection with casing seat (15) is the Weak link (163) of transverse area local wall thickness reduction.

10. a kind of vein blood taking needle according to claim 4, which is characterized in that limiting component is by blood taking needle tube socket (12) limited post (1211) that top end face (121) extends passes through the through hole (155) of casing seat (15) opposite position, limit Column (1211) head (1212) corresponding size is greater than through hole (155).

11. a kind of vein blood taking needle according to claim 4, which is characterized in that limiting component is by blood taking needle tube socket (12) limited post (1211) that top end face (121) extends passes through the through hole (155) of casing seat (15) opposite position, limit Column (1211) head (1212) corresponding size is greater than through hole (155)；Compressed spring (18a) is sheathed on limited post (1211) outside.

12. a kind of vein blood taking needle according to claim 1, which is characterized in that casing seat (15) or casing seat handle (16) it is equipped between blood taking needle tube socket (12) and casing seat (15) is prevented to return component to the mobile resistance in blood taking needle tube socket (12) direction, Sharp blood-collecting needle tube tip (111) is avoided to deviate from from soft cannula tip (141).

13. a kind of vein blood taking needle according to claim 12, which is characterized in that casing seat handle (16) bottom surface is equipped with top Portion tilts the resistance that circle pauses and bottom is relatively sharp keen and goes back to raised (173), can be in blood taking needle tube socket (12) surface or blood taking needle tube socket (12) sliding in the groove (125) of corresponding site, when elasticity part (18) actuating sleeve tube socket (15) is to blood-collecting needle tube (11) tip (111) when moving in place, raised (173) vertical bottom face (175) outstanding and blood taking needle tube socket top end face (121) phase are hindered back It supports, casing seat (15) is prevented to reply displacement.

14. a kind of vein blood taking needle according to claim 12, which is characterized in that casing seat handle (16) extends to blood sampling The part of needle tubing seat (12) is equipped with through hole (176), and resistance movable up and down is cased in through hole (176) and is sold back to a grain-producing area (P), blood taking needle Tube socket (12) corresponding position recess is at pin hole (127), when casing seat handle (16) is adopted under elasticity part (18) driving to separate Blood needle tubing seat (12) direction it is mobile in place when, resistance is sold back to a grain-producing area (P) and can be slid in pin hole (127), and casing seat (15) and blood sampling are prevented Needle tubing seat (12) move to axial.

15. a kind of vein blood taking needle according to claim 1, which is characterized in that further include and blood taking needle tube socket (12) phase Needle tubing seat handle (19) even, needle tubing seat handle (19) can be touched simultaneously with casing seat handle (16) by two fingers of operator.

16. a kind of vein blood taking needle according to claim 15, which is characterized in that needle tubing seat handle (19) is independent part Part, independent needle tubing seat handle (19a), integral blade shape, bottom section is in inverted T shaped；Blood taking needle tube socket (12) upper surface (122) is set The section for having mouthful handle big is in inverted T shaped embeded slot (1221), and the size in embeded slot (1221) section is greater than corresponding independence Accumulate size in the needle tubing seat handle bottom section (19a).

17. a kind of vein blood taking needle according to claim 15, which is characterized in that needle tubing seat handle (19) is integrally in blade Shape is linked together in blood taking needle tube socket (12) upper surface (122) and blood taking needle tube socket (12), is vertical-type needle tubing seat handle (19b), the connection between vertical-type needle tubing seat handle (19b) and blood taking needle tube socket (12) upper surface (122) be include rely on it is vertical To rotary shaft or the Weak link (193) of longitudinal region local wall thickness reduction；Make vertical-type needle tubing seat handle (19b) can it is opposite with adopt Blood needle tubing seat (12) rotates left and right.

18. a kind of vein blood taking needle according to claim 15, which is characterized in that needle tubing seat handle (19) is foliaceous water Flat pattern needle tubing seat handle (19c) is connected with blood taking needle tube socket (12) side (124)；Corresponding casing seat handle (16) is leaf Sheet horizontal type casing seat handle (16), horizontal type casing seat handle (16) and blood taking needle tube socket (12) contact portion (17) end There are one raised (179)；Blood taking needle tube socket (12) corresponding site is equipped with a windowed regions (W2), exposes and is set in being located in it Delivery hose (132) between windowed regions top end face (128) and bottom face (1281)；By horizontal type casing seat handle (16) to The pressing of blood taking needle tube socket (12) upper surface, end-boss (179) can make the delivery hose (131) in windowed regions (W2) be recessed Deformation.

19. a kind of vein blood taking needle according to claim 15, which is characterized in that needle tubing seat handle (19) is in foliaceous, Left (19c2) right (19c1) two panels, is connected with blood taking needle tube socket (12) left and right sides respectively；Casing seat handle (16) is to adopting The thin-walled that blood needle tubing seat (12) upper surface (122) extends is rod-shaped；Radial inflow is turned up left and right two panels needle tubing seat handle and will be covered when use Tube socket handle (16) is sandwiched therebetween, and firmly squeezing makes the end-boss of casing seat handle (16) press to blood taking needle tube socket (12) windowing Delivery hose (131) in region (W2), is allowed to deformed depression.

20. a kind of vein blood taking needle according to claim 1, which is characterized in that further include penetrating blood hose (24), it is soft to penetrate blood Pipe (24) a part, which is located at, send blood needle tubing (21) inner cavity (210), a part of from the pin hole for sending blood needle tubing (21) tip (211) (212) it is leant out in, penetrates blood hose (24) and lean out the end (242) of part (241) equipped with a vertical opening (2411).

21. a kind of vein blood taking needle according to claim 1, which is characterized in that further include penetrating blood hose (24), it is soft to penetrate blood Pipe (24) a part, which is located at, send blood needle tubing (21) inner cavity (210), a part of from the pin hole for sending blood needle tubing (21) tip (211) (212) it is leant out in, penetrates blood hose (24) and lean out the end (242) of part (241) and be equipped with a vertical opening (2411) and at least One lateral openings (2412).

22. according to a kind of vein blood taking needle described in claim 1, which is characterized in that further include penetrating blood hose (24), penetrate blood hose (24) a part, which is located at, send blood needle tubing (21) inner cavity (210), a part of from the pin hole (212) for sending blood needle tubing (21) tip (211) It inside leans out, penetrating blood hose (24) and leaning out the end (242) of part (241) is cecum, and the end (242) for penetrating blood hose (24) is equipped with At least one lateral openings (2412).

23. according to a kind of vein blood taking needle described in claim 1, which is characterized in that it is blind for sending blood needle tubing (21) tip (211) The pin hole at end, blood outflow is lateral pin hole (213), and lateral pin hole (213) is at least one.

24. according to a kind of vein blood taking needle described in claim 1, which is characterized in that it is blind for sending blood needle tubing (21) tip (211) The pin hole at end, blood outflow is lateral pin hole (213), and lateral pin hole (213) is at least one；Penetrate blood hose (24) be located at send blood In needle tubing (21) inner cavity (210), blood hose (24) are penetrated equipped with lateral openings (2413) corresponding with lateral pin hole (213).

25. according to a kind of vein blood taking needle described in claim 1, which is characterized in that it is blind for sending blood needle tubing (21) tip (211) The pin hole at end, blood outflow is lateral pin hole (213), and lateral pin hole (213) is at least one；Penetrate blood hose (24) be located at send blood In needle tubing (21) inner cavity (210), blood hose (24) are penetrated equipped with lateral openings (2413) corresponding with lateral pin hole (213)；It penetrates The area of the lateral openings (2413) of blood hose (24) is less than the area of lateral pin hole (213).