CN205698725U

CN205698725U - A kind of venipuncture needle

Info

Publication number: CN205698725U
Application number: CN201620342857.6U
Authority: CN
Inventors: 董东生; 周慷; 李娜
Original assignee: BEIJING WANSHENG RENHE TECHNOLOGY Co Ltd
Current assignee: BEIJING WANSHENG RENHE TECHNOLOGY Co Ltd
Priority date: 2015-04-24
Filing date: 2016-04-22
Publication date: 2016-11-23
Anticipated expiration: 2026-04-22
Also published as: CN106063957B; CN106063957A

Abstract

This utility model provides a kind of venipuncture needle, including conduit, syringe needle, needle stand, needle handle, and the withdraw of the needle assembly being positioned on needle handle, described withdraw of the needle assembly utilizes operating element command displacement parts to drive syringe needle substep displacement, facilitate secondary propulsion bulb to enter the correct position of patient's vein, add the puncture success rate of puncture needle.The withdraw of the needle modular construction that this venipuncture needle provides is simple, and function uses sequence arrangement proper, not only improves the puncture success rate of puncture needle, and the most effectively protection puncture needle will not accidental puncture medical personnel after using.

Description

A kind of venipuncture needle

Technical field

This utility model relates to a kind of venipuncture needle, is particularly used for human vein transfusion, the remaining needle of hemodialysis, Belong to medical apparatus and instruments manufacture technology field.

Background technology

Venous detaining needle is a kind of medical apparatus and instruments for the treatment such as venous transfusion, hemodialysis, existing venous indwelling Needle set has the conduit of flexibility, and the metal needle that catheter interior is arranged, and the tip portion of syringe needle is exposed to catheter retaining part Outside.During use, the tip portion of syringe needle inserts targeted vein through patient skin, makes catheter segment indwelling part and syringe needle Front end enters targeted vein, and secondary propulsion bulb and syringe needle go successively to vein, until after conduit arrives the correct position of vein, Syringe needle is taken out from conduit.In some cases, when the targeted vein of patient is punctured by medical personnel, need by seeing Examine blood back to judge that conduit and syringe needle have thrust Venous Blood pipe, but due to blood back path farther out or patient's vein Pressure deficiency, it is seen that blood back required time thrusts the time needed for Venous Blood pipe far more than medical personnel, often results in and stays Put pin syringe needle puncture not in place or penetrate blood vessel rear wall, need to re-start retained needle puncture, bring meaningless pain to patient Hardship, so in the case of patient's venous pressure deficiency, needing to form negative pressure, by the blood of human vein internal blood vessel at needle lumen Liquid sucks needle lumen, assists quick blood back to judge whether to have thrust Venous Blood pipe.In the case of another kind, patient's Targeted vein diameter is less, and therefore, when secondary propulsion bulb and syringe needle enter vein correct position, the tip portion of syringe needle leads to Often can pierce through targeted vein, make the foundation failure of venous access, so should cover after conduit and needle tip enter targeted vein The tip portion of lid syringe needle, covering method should make the conduit of entrance targeted vein keep resting position, make the tip of syringe needle simultaneously Part is retracted into conduit cavity, and after the tip portion of syringe needle is covered by conduit, propulsion bulb and syringe needle enter the conjunction of vein again Right position is put, and does not now have the danger piercing through vein.Certainly, the length that the tip portion of syringe needle is covered by conduit should be can Control, tip portion can be made to pierce through targeted vein because covering deficiency, not reaching coverage effect；Excessively covering can make again conduit Can not get the support of syringe needle, when secondary propulsion bulb and syringe needle enter vein correct position, conduit can occur twisting, bending etc. It is not easily accessed the situation of human vein correct position.

Chinese patent publication No. CN2614686 discloses a kind of venous detaining needle that can see rapidly blood back, and it is at conduit Internal syringe needle is provided with side opening, and side opening communicates with pin hole, and this side opening can make medical personnel puncture Venous Blood pipe Time see blood back as early as possible, in order to confirm to enter vein blood vessel, it is to avoid syringe needle punctures not in place or penetrate blood vessel rear wall, but this stays Put quick blood back when pin side opening cannot solve patient's venous pressure deficiency, it is impossible to fundamentally solve whether to enter vein blood vessel Decision problem.

Chinese patent publication No. CN202136638 discloses one and disposably exempts from washing pipe vesicle formula negative pressure venous indwelling needle, This remaining needle is provided with elastic vesicle on the flexible pipe of conveying liquid, and pressing vesicle can produce negative pressure, assist Venous Blood pipe Quickly blood back, this remaining needle solves the quick blood back problem that patient's venous pressure is not enough, but this vesicle is arranged on flexible pipe, pressing Time need single finger to operate, bring too much burden to the finger of medical personnel, use and have inconvenience more.

Chinese patent publication No. CN102791320 discloses a kind of pipe guide with Cover Characteristics, and this device has Catheter adapter, syringe needle, needle stand, biasing arm, when driving described biasing arm, catheter adapter is reorientated relative to needle stand, The tip portion of syringe needle is coated over catheter interior, makes the tip portion of syringe needle be retracted into after catheter interior propulsion bulb and syringe needle again Enter the correct position of vein, there is the technique effect that protection targeted vein is not punctured.But, the biasing arm of this device is arranged Position has limitation, and the first is at needle stand rear portion, needs to hold the another hand drive biasing arm outside needle handle, it is achieved syringe needle Tip portion is retracted into catheter interior；Another kind of on needle handle, needle handle is provided with detent, moves forward and backward and makes biasing arm drive pin The tip portion of head is retracted into catheter interior, and detent limits the distance that biasing arm moves forward and backward.In reality, medical personnel At one hands pressing patient's arm vein of many employings, another hands holds remaining needle needle handle and carries out the foundation of venous access, works as doctor The personnel of protecting unclamp that hand of pressing when removing to drive biasing arm, and patient's arm vein and superficial skin can occur bigger displacement, Making venipuncture failure, serious meeting causes remaining needle that targeted vein causes damage, and biasing arm is positioned on needle handle, utilizes hands Refer to relative to when displacement drives biasing arm before and after needle handle, the most easily occur that needle tip part is the most irregularly provoked, hold Easily targeted vein is caused damage and makes venous access set up unsuccessfully.Therefore, either with another hand drive biasing arm, or , all can there is the risk that targeted vein is caused damage in displacement drive biasing arm before and after on needle handle.

Stably it is retracted into catheter interior to solve the tip portion of above-mentioned remaining needle syringe needle, and assisted IV presses deficiency The quick blood back of patient also shows blood back as early as possible, reduces remaining needle syringe needle and punctures situation that is not in place or that penetrate vein blood vessel, improves The problem of medical personnel's work efficiency, medical apparatus and instruments research staff need badly exploitation a kind of can not only be stable by remaining needle syringe needle Tip portion is retracted into catheter interior, and utilizes negative pressure auxiliary quickly display vein blood back, it is simple to medical personnel's finger manipulation A kind of venipuncture needle.

Summary of the invention

The purpose of this utility model is to provide a kind of venipuncture needle, and first solves existing remaining needle cannot quickly show Blood back, it may be judged whether thrust the technical problem of Venous Blood pipe；Second solves existing remaining needle uses finger and needle handle The mode of surface relative parallel displacement controls the risk piercing through vein brought in needle tip part is retracted into conduit；3rd by auxiliary Helping quickly display vein blood back and the parts controlling the withdraw of the needle to be arranged on needle handle, the finger making human body gripping puncture needle is the most permissible Control quickly to show blood back, it may be judged whether punctured entrance Venous Blood pipe, needle tip part can have been controlled again and be retracted into Conduit, in order to secondary propulsion bulb and syringe needle enter the correct position of patient's vein.

This utility model provides a kind of venipuncture needle, including: conduit, syringe needle, needle stand, needle handle, and withdraw of the needle assembly, institute State the clear tubular that conduit is inner hollow, there is conduit cavity, catheter retaining part, conduit connecting portion, conduit cavity one End is conduit liquid outlet, and the other end is conduit inlet opening；Described syringe needle is the tubulose of inner hollow, has needle lumen, most advanced and sophisticated Part, needle main body part, described needle main body is partially accommodated in conduit cavity, and its tip portion stretches out the conduit of conduit cavity Liquid outlet；Described needle stand has a needle stand inner chamber of inner hollow, and needle stand front end and needle stand rear end, wherein needle stand inner cavity Being provided with batching pig, needle stand inner chamber is divided into the conduit cavity of liquid chambers and withdraw of the needle chamber, described liquid chambers and conduit by this batching pig Being connected, needle stand leading inside wall is tightly connected with catheter connector outer side wall；Described needle handle holds for convenience of human finger Lamellar, there is the needle handle first surface and needle handle second surface contacted with finger；Described withdraw of the needle assembly includes displacement component And operating element, described displacement component is positioned at needle stand rear end, is connected with needle main body portion distal end, and displacement component drives syringe needle to enter Row displacement at least one times, displacement component drives syringe needle, relative to conduit, displacement for the first time occurs, and syringe needle is displaced to from original state First state, the tip portion of syringe needle enters conduit cavity；Displacement component drives syringe needle, relative to conduit, second time displacement occurs, Syringe needle detaches from conduit cavity to the second state, syringe needle from the first state displacement；Described operating element is positioned on needle handle, at finger In the case of there is not relative displacement relative to needle handle first surface or needle handle second surface, outside finger is applied by operating element Power is transferred on displacement component.

Described conduit can be major part for pellucidity, local is opaque state, if conduit fractures quiet at human body Arteries and veins internal blood vessel, zone of opacity is convenient to be found by X-ray equipment.

Described displacement component is positioned at needle stand rear end, both can be in parts in needle stand rear end withdraw of the needle intracavity portion, also Multiple parts of needle stand rear end can be in, when displacement component is made from multiple components, have between the plurality of parts The relation cooperated or connect exists.The specific explanations that describes of above-mentioned finger is the thumb of staff, forefinger etc., described needle handle Surface is divided into needle handle first surface and needle handle second surface, according to the use habit of most medical personnel, needle handle first surface and Needle handle second surface is respectively relative to hand thumb and the right hand forefinger of medical personnel, and certain sinistral medical personnel are also Exist, it is also possible to lay the corresponding finger of left hand for needle handle first surface and needle handle second surface.

Described original state is the conduit liquid outlet that needle tip part stretches out conduit cavity, is now used for piercing through patient's skin Skin also enters Venous Blood pipe；Described first state is that needle tip part is retracted into inside conduit cavity, needle tip part Being covered by conduit, the part that now conduit cavity contains syringe needle, syringe needle and conduit is positioned at inside vein blood vessel, can push away with secondary Enter conduit and syringe needle enters patient's vein correct position；Described second state is that syringe needle separates with conduit, when conduit and syringe needle After entering into Venous Blood pipe correct position, detaching syringe needle, described catheter retaining part, inside vein blood vessel, completes quiet The foundation in beniol road.

Described operating element is positioned on needle handle, specifically may be located at needle handle surface or is positioned at inside needle handle.Use and puncture During pin, two fingers of the many employings of medical personnel pinch the needle handle of puncture needle, and specifically thumb is relative with forefinger, and middle clamping punctures The finger belly of the needle handle of pin, thumb or forefinger contacts with the operating element on needle handle, gives when needs operating element applies external force During displacement component, pressing needle handle on operating element, force direction for being perpendicular to needle handle surface or being approximately perpendicular to needle handle surface, Certainly, having certain angle on force direction and needle handle surface also possible, angle can be selected between 45 ° and 135 °, preferably At about 90 °, the deviation angle of left and right controls between positive and negative 10 °.It is above-mentioned that " finger is relative to needle handle first surface or needle handle There is not relative displacement in two surfaces " it is interpreted as that human finger finger belly does not occur parallel direction or close to parallel side with needle handle surface Position upwards is moved and is applied external force to displacement component, is wherein interpreted as that two plane included angles are less than close to parallel direction definition Equal to 15 °, it may be assumed that the plane of human finger finger belly and needle handle surface angle less than or equal to 15 ° it is considered that just close to parallel side To, the plane of finger finger belly and needle handle surface belong to rubbing state in a direction such.

Described operating element, if located on needle stand, has fabrication design advantage for arranging withdraw of the needle assembly, but is not easy to Medical personnel operate with.Specifically, the needle handle that medical personnel pinch puncture needle with two fingers carries out puncture needle use, When the needs withdraw of the needle, needing to unclamp pinch the finger of needle handle and be displaced on needle stand operate, this process has puncture needle meaning The risk of outer injured patient's vein blood vessel.In prior art, needle stand mostly is cylindrical, arranges operating element and is unfavorable for medical personnel Finger apply external force, easily slip.

In a kind of technical scheme, described operating element is in the shell fragment of arch on needle handle, and described shell fragment includes fixing end, Middle part and movable end, described fixing end is fixing with needle handle to be connected, and presses down in the middle part of shell fragment, drives shell fragment movable end to displacement portion Direction, part place is moved, when movable end drive displacement parts drive syringe needle be displaced to the first state from original state time, syringe needle to After needle stand, extreme direction is the most mobile, and needle tip is partially into conduit cavity.Described shell fragment is overall in the arch being bent upwards, Fixing end and movable end are positioned at the double bottom of arch, and middle part is positioned at the high point of arch, and fixing end is provided with groove or projection, described Needle handle is provided with depression, and concave interior is provided with the fixed connection structure matched with fixing end groove or projection, makes fixing end and pin Handle is fixing to be connected, and presses down on the middle part of arch shrapnel, and shell fragment movable end is to the displacement of displacement component direction, and displacement path can be by leading To chute, slide rail control, movable end in the displacement process of displacement component direction, shell fragment bending arch reduce, in the middle part of shell fragment to The direction of displacement component has short distance close, and described short distance is grade, and shell fragment force direction is perpendicular to needle handle surface or connects Closely it is perpendicular to needle handle surface, and in the middle part of shell fragment, short distance displacement does not haves that needle tip part is the most irregular provokes, It is safe to targeted vein.Certainly, for making the design of this structure more optimize, guide pillar can be set at shell fragment middle lower surface, press Time in the middle part of pressure shell fragment, shell fragment movable end is to the displacement of displacement component direction, and in the middle part of shell fragment, displacement vertically downward, does not haves in shell fragment Portion is short-range close to displacement component direction.After shell fragment movable end touches displacement component, displacement component is driven to move, position The needle tip part moving parts connection is retracted into inside conduit cavity, and needle tip part is covered by conduit, and syringe needle is from initial shape State is displaced to the first state.Because syringe needle is displaced to the close together of the first state institute displacement, shell fragment movable end from original state Displacement component can be promoted completely to move, but when the first state to the second state, syringe needle needs to detach from conduit cavity, position Move distant, so needing to arrange opening structure on needle handle, and spring is set in needle stand rear end pulls displacement component, when When shell fragment movable end touches opening structure, the spring of needle stand rear end pulls displacement component to move, so that syringe needle detaches conduit Inner chamber.The setting of above-mentioned shell fragment has structure design simply, and processing technique is convenient, uses the convenient many useful effects of process safety Really.

Being provided with gap between described shell fragment movable end and displacement component, shell fragment middle lower surface is provided with obstruct part, liquid The elastic pipeline that chamber is connected touches with intercepting part bottom connection, presses down in the middle part of shell fragment, intercepts portion extrusion elasticity pipeline Inner chamber, extrude the original partially liq of pipeline inner chamber, unclamp the pressing in the middle part of shell fragment, upspring in the middle part of shell fragment, with liquid chambers The pipeline that is connected recovers, and forms negative pressure in liquid chambers and needle lumen, the blood in human vein be inhaled into needle lumen and Conduit cavity.Described gap prevents at the middle part that pushes shrapnel, and when forming negative pressure display blood back, first shell fragment movable end is touched and put in place Move parts, make needle tip part accidentally enter inside conduit cavity, so when auxiliary display blood back, push shrapnel middle part one Needing after segment distance to unclamp in the middle part of shell fragment, the blood of negative pressure auxiliary human vein internal blood vessel enters in needle lumen and conduit Chamber.The above-mentioned pipeline that is connected with liquid chambers is the extension of infusion pipeline, described infusion pipeline refer specifically to puncture needle with extraneous even Logical liquid transmission pipeline, this section of infusion pipeline, through needle handle, is directly connected with liquid chambers, intercepts this section of partial action and has On elastic infusion pipeline.When infusion pipeline upstream is truncated, by extruding the tube wall of infusion pipeline, in extrusion infusion pipeline The original partially liq in chamber, unclamps the extruding to infusion pipeline, forms negative pressure, attractive vena systemica blood vessel at infusion pipeline inner chamber Internal blood enters needle lumen and conduit cavity.

Above-mentioned shell fragment uses the elasticity such as polypropylene, polyethylene or polypropylene and thermoplastic elastomer (TPE) TPE mixing material relatively Good plastic material is made, it is of course also possible to select elastic preferably metal material to make.When using puncture needle, human finger Thumb finger belly slight amount shell fragment, intercept the pipeline that is connected with liquid chambers of portion extrusion, in making pipeline inner chamber and liquid chambers The part medicinal liquid in portion is extruded, and the pipeline of conveying liquid is temporarily blocked, and uses puncture needle to thrust human vein blood vessel, finger thumb Referring to that finger belly unclamps shell fragment, be internally formed negative pressure in liquid chambers and needle lumen, the blood of auxiliary human vein internal blood vessel enters Needle lumen and conduit cavity, contribute to medical personnel and judge whether puncture needle comes into vein blood vessel.If continuing pressing Shell fragment, until end in contact before described shell fragment movable end and displacement component, forces displacement component to drive syringe needle extreme direction after needle stand Mobile, syringe needle is displaced to the first state from original state, and needle tip is partially into inside conduit cavity, now needle tip end Divide and will not stab or pierce through human vein blood vessel, the correct position of human vein can be entered into propulsion bulb and syringe needle；When leading After pipe and syringe needle have been introduced into human vein correct position, extract displacement component thus drive syringe needle to detach from conduit cavity, Syringe needle, from the first state displacement to the second state, completes the foundation of venous access.Said structure design is by quiet for auxiliary quickly display Arteries and veins blood back and the parts controlling the withdraw of the needle are arranged on needle handle, and the finger making human body grip puncture needle both can control quickly to show Blood back, it may be judged whether punctured entrance Venous Blood pipe, needle tip part can have been controlled again and be retracted into conduit, in order to secondary Propulsion bulb and syringe needle enter the correct position of patient's vein, considerably increase the puncture success rate of puncture needle, solve existing In technology, needle tip part pierces through the risk of human vein blood vessel.

Described operating element is in the utricule on needle handle, and this utricule has the utricule inner chamber of preset fluid, in its utricule Chamber is connected with withdraw of the needle chamber, and is filled with fluid for withdraw of the needle chamber, utilizes fluid pressure actuated displacement component to drive syringe needle from initial shape State is displaced to the first state.Described utricule is resilient hemispherical for tool, is attached on needle handle, and its utricule inner cavity can be pre- Put liquid or gas, the utricule on vertical pressing needle handle, utilize the displacement component of fluid pressure actuated needle stand rear end to move, thus Drive syringe needle to be displaced to the first state from original state, after conduit and syringe needle have been introduced into vein correct position, extract position Moving parts thus drive syringe needle to detach from conduit cavity, syringe needle to the second state, completes venous access from the first state displacement Set up.

Described displacement component includes the piston being positioned at withdraw of the needle intracavity portion, and this piston, at withdraw of the needle chamber internal displacement, drives syringe needle It is displaced to the first state from original state.Described piston moves in withdraw of the needle intracavity portion, and this piston is fixing with needle main body part even Connecing, when the fluid driven piston in utricule is at withdraw of the needle intracavity rearward displacement, piston driving syringe needle is displaced to from original state One state, needle stand rear end is provided with the displaceable body being connected with piston, and this displaceable body drives syringe needle from the first state displacement to the Two-state.

Described displacement component is provided with position limiting structure, and displacement component drives syringe needle to be displaced to the first state from original state, This position limiting structure is used for stoping displacement component to drive syringe needle to continue displacement.The displacement master of described position limiting structure specifically displacement component The T-shaped structure that the movable span arranged on body and needle main body portion distal end are arranged, for making displacement component drive syringe needle from initial shape State is displaced to obtain during the first state spacing, it is to avoid displacement is not enough or over-travel, when piston extreme direction displacement after needle stand Time, movable span is the space length needed for T-shaped structure offer activity, this space length can ensure that syringe needle relative to conduit from just Beginning state displacement is to the first state, but also will not produce too much displacement.When needs syringe needle detaches from conduit cavity, displaceable body Movable span hook the T-shaped structure of needle main body part, syringe needle is detached from conduit cavity, completes syringe needle from the first mode bit Move on to the second state.Another kind of situation, is provided with cooperate spacing between described displacement component outer wall and needle stand rear end inwall Structure, displacement component drives syringe needle to be displaced to the first state from original state, and position limiting structure is used for stoping displacement component to continue position Move.Described position limiting structure is the depression on the inwall of needle stand rear end and the flange collar on displacement component outer wall, described depression and flange collar phase The most chimeric.Certainly, described flange collar can also be arranged on the end of needle main body part, and depression is arranged on the inside of displacement component.

Described operating element is in the rack and pinion on needle handle, and described rack and pinion engages each other, and its tooth bar can It is subjected to displacement relative to the vertical direction of needle handle, presses down on tooth bar thus driven gear rotation；Described gear and displacement component Connecting, gear rotarily drives displacement component and is subjected to displacement or rotates, and displacement component drives syringe needle to be displaced to the from original state One state.Described tooth bar is perpendicular to needle handle surface configuration, and gear is positioned at inside needle handle, is additionally provided with and has guide function inside needle handle Tooth bar guide groove, gear that vertical pressing rack drives engages rotates, and drive displacement parts synchronize to rotate, this displacement Parts scrolling needle main body portion distal end, drives syringe needle extreme direction displacement after needle stand, makes syringe needle be displaced to the from original state One state.In order to make displacement component drive syringe needle from the first state displacement to the second state, it is provided with individually in withdraw of the needle intracavity portion Gear train, this gear train is detachable engagement, and one of them gear is connected with displacement component, inside another gear and needle handle Gear coaxially connected, when the gear within needle handle rotarily drive in-line gears rotate time, on displacement component meshed gears with Shi Xuanzhuan, to drive syringe needle to make state displacement to the first state from just, after needle stand, extreme direction extracts displacement component, this displacement portion The gear, the syringe needle that connect on part detach jointly, and syringe needle, from the first state displacement to the second state, completes the foundation of venous access.

Described operating element is in the seesaw on needle handle, and this seesaw controls described displacement component, presses down on seesaw and drives Dynamic displacement component drives syringe needle to be displaced to the first state and the second state from original state；Described displacement component is in withdraw of the needle chamber Buckle, described buckle is connected with needle main body portion distal end, which is provided with buckle protruding, and needle stand rear end is provided with buckle through hole, When buckle projection is positioned at buckle through hole, syringe needle is positioned at original state, and tip portion stretches out the conduit liquid outlet of conduit cavity；Card When button projection exits in buckle through hole, syringe needle is positioned at the first state, and tip portion enters inside conduit cavity.Described buckle is by having Resilient material is made, and when buckle projection exits in buckle through hole, buckle utilizes natural resiliency to drive syringe needle from initially State displacement is to the first state.

Based on such scheme, for optimizing withdraw of the needle effect further, puncture needle also includes that force application part, described force application part are Spring, this spring is connected with buckle, is used for driving buckle to drive syringe needle to be displaced to the first state and the second shape from original state State, when buckle projection is positioned at buckle through hole, spring is in compression or extended state；When buckle projection exits in buckle through hole, Spring restores to the original state, and buckle is applied external force.

Described card is buckled and is provided with the first buckle projection and the second buckle projection, and described first buckle is protruding and the second buckle is convex Rising when being positioned at buckle through hole, spring is in compression or extended state, and syringe needle is positioned at original state, and tip portion stretches out in conduit The conduit liquid outlet in chamber；When first buckle projection exits in buckle through hole, the part reinstatement of spring, syringe needle is positioned at first State, tip portion enters inside conduit cavity；When first buckle is protruding and the second buckle projection exits in buckle through hole, spring Restoring to the original state, syringe needle is positioned at the second state, and syringe needle detaches from conduit cavity.In the program, buckle is that buckle is executed by force application part Power, thus drive needle displacement.Described first buckle is protruding and the second buckle projection is manipulated by above-mentioned seesaw, and seesaw blocks first When button projection releases buckle through hole, spring force buckle also drives syringe needle to be displaced to the first state from original state；Seesaw is by When two buckle projections also release buckle through hole, spring again exert a force buckle drive syringe needle from the first state displacement to the second state. Certainly, in order to avoid by the first buckle is protruding and the second buckle projection releases buckle through hole, withdraw of the needle position and withdraw of the needle step simultaneously Being difficult to control to, it is possible to use cam structure, single releases the first buckle projection in buckle through hole or the second buckle is protruding.Above-mentioned Cam structure is driven by the gear rotated, and arranges rack and pinion and engage each other inside needle handle.

Described needle handle is provided with the negative pressure sac with elastic recovery capability, is provided with negative pressure cavity inside this negative pressure sac, this negative pressure Chamber is connected with liquid chambers and needle lumen, after human finger exerts a force to negative pressure sac and unclamps negative pressure sac, and the liquid of negative pressure cavity connection Body cavity and needle lumen form negative pressure.When the pipeline carrying liquid is truncated, press inside described negative pressure sac extrusion liquid chambers Part medicinal liquid, use after puncture needle thrusts vein blood vessel, unclamp negative pressure sac, be internally formed negative in liquid chambers and needle lumen Pressure, the blood of human vein internal blood vessel is inhaled into liquid chambers and needle lumen, contributes to judging whether puncture needle comes into Human vein blood vessel.

Described negative pressure sac and operating element are co-located on surface, needle handle the same side, a part of region of human finger to Negative pressure sac exerts a force, and another part region exerts a force to the operating element of withdraw of the needle assembly.Negative pressure sac and operating element are co-located on pin On handle first surface or needle handle second surface, the finger belly subregion of human finger controls negative pressure sac and operating element, a part of district Territory is used for pressing and unclamping negative pressure sac, and it is displacement component force that another part region is used for pressing operating element.Preferentially select people Body thumb in two fingers of grip needle handle, because thumb finger belly region is bigger, it is simple to pressing negative pressure sac and manipulation portion Part.In the case of another kind, at least some of described negative pressure sac overlaps at needle handle first surface or needle handle with operating element On second surface, human finger first contacts negative pressure sac and exerts a force to negative pressure sac, continues the operating element of force contact withdraw of the needle assembly. Described negative pressure sac is positioned at operating element top, i.e. negative pressure sac, operating element, three layers of needle handle surface and stacks setting, pin from top to bottom Handle surface is basal layer, and human finger finger belly first contacts and presses negative pressure sac, is internally formed negative pressure in liquid chambers and needle lumen, The auxiliary quick blood back of human vein blood vessel, it is judged that whether puncture needle comes into vein blood vessel；If puncture needle comes into quiet Arteries and veins blood vessel, it is displacement component force that human finger finger belly continues pressing operating element, controls needle tip part and is retracted in conduit Chamber, secondary propulsion bulb and syringe needle enter human vein correct position；After puncture needle enters into vein blood vessel correct position, from leading Tube cavity detaches syringe needle, completes the foundation of venous access.

Described negative pressure sac is positioned on needle handle first surface or needle handle second surface, and the operating element of withdraw of the needle assembly is positioned at needle handle Contrary side.Described negative pressure sac, operating element lay respectively on needle handle first surface and needle handle second surface, human finger Thumb and forefinger control respectively, are arranged such the function that can distinguish negative pressure sac and operating element, utilize different finger finger bellys Operate, it is to avoid maloperation occurs.

For the most quickly display vein blood vessel blood back, described syringe needle is contained in the part of conduit cavity and is provided with at least one Individual side opening, this side opening communicates with the needle lumen of syringe needle.Described side opening is arranged close to needle tip part, and described conduit is Bright state, specifically can select transparent material to make, during vein blood vessel blood back, and the shown in red point-like of side opening on syringe needle, institute Stating side opening can be in wire shaped or some shape is arranged on syringe needle, it is simple to medical personnel observe the blood back of vein blood vessel and blood back speed Degree.

Described puncture needle also includes that tip parts, described needle stand are provided with Transparence Display region, and tip parts is positioned at needle stand Side, Transparence Display region, syringe needle is when original state is displaced to the first state, and this tip parts is aobvious in Transparence Display region Show.Described tip parts is connected with displacement component, above-mentioned displacement component drive syringe needle when original state is displaced to the first state, Tip parts shows that in Transparence Display region special marking, preferably English or Chinese character represent.Specifically, described tip parts position On the left of Transparence Display region, or referred to as front, when displacement component drives syringe needle to be displaced to the first state from original state, Tip parts moves the most to the right with displacement component, or is referred to as rearward moving, and tip parts is on Transparence Display region Display, prompting user syringe needle, already at the first state, can enter the suitable of human vein with secondary propulsion bulb and syringe needle Position.Above-mentioned Transparence Display region is the region of the one section of pellucidity arranged in needle stand rear end, and preferably needle hub body is impermeable Bright state, only Transparence Display region are pellucidity.

Beneficial effect:

This utility model arranges operating element on the needle handle of human finger grip, and the pressing utilizing finger finger belly is displacement Parts apply external force, and manipulation displacement component drives syringe needle to make state displacement to the tip portion quilt of the first state, i.e. syringe needle from just Conduit covers, and now secondary propulsion bulb and syringe needle enter the correct position of human vein.The design of this structure does not the most use handle Hold the another hands outside needle handle and go operation, make this hands be constantly in the light state pressing human arm skin, human body hands will not be unclamped Skin of arm causes the vein blood vessel in puncture to move, and considerably increases the puncture success rate of puncture needle；It addition, the design of this structure makes There is not the most operable withdraw of the needle of displacement of opposing parallel state relative to needle handle surface in finger, it is to avoid finger is rubbed with the hands on needle handle surface Needle tip part caused by dynamic dislocation is provoked up and down, reduces the needle tip part accidental injury risk to vein blood vessel, Considerably increase the puncture success rate of puncture needle, solve needle tip part in prior art and pierce through the wind of human vein blood vessel Danger.

Operating element of the present utility model uses multiple Design of Mechanical Structure, and wherein elastic piece structure utilizes oneself of soft material Body is elastic, on the one hand can temporarily intercept the pipeline of conveying liquid, forms negative pressure in liquid chambers and needle lumen, quickly sees quiet The puncture blood back of arteries and veins blood vessel, it is judged that whether puncture needle comes into vein blood vessel；On the other hand displacement component can be promoted to occur Displacement, exits from needle stand, when secondary inserting needle enters human vein correct position, it is to avoid puncture needle penetrates vein blood vessel, greatly Add greatly the puncture success rate of puncture needle.It is simple that this shell fragment has overall construction design, and processing technique is convenient, uses process peace Complete convenient many beneficial effects.In another kind of structure, utricule structure utilizes preset fluid operated displacement component to be subjected to displacement, from And driving the syringe needle withdraw of the needle, the design of this structure not only makes device performance stable, and makes device convenient processing and manufacture, contributes to product Large-scale production.

This utility model is provided with negative pressure sac on the needle handle of human finger grip, at the syringe needle near needle tip part Outer wall is provided with the side opening run through, and utilizes finger finger belly to press negative pressure sac, extrusion part medicinal liquid within liquid chambers, uses and puncture After being needled into vein blood vessel, unclamping negative pressure sac, be internally formed negative pressure in liquid chambers and needle lumen, auxiliary human vein blood vessel returns Blood, and quickly at side opening position display blood back, on the one hand contribute to judging whether puncture needle comes into vein blood vessel, it is to avoid wear Vein blood vessel causes puncture failure thoroughly, considerably increases the puncture success rate of puncture needle；On the other hand avoid repeatedly puncturing to trouble The venous injury problem that person brings.

This utility model overlaps operating element and negative pressure sac on needle handle, two finger grip needle handles of human body, bag Including forefinger and thumb, the finger belly of its middle finger contacts with negative pressure sac, operating element, and when puncture needle uses, folder closes conveying liquid Pipeline, thumb finger belly with vertical angle or close to vertical angle pressing negative pressure sac, makes the part medicine of needle lumen to needle handle surface Liquid is discharged, and needle tip part, catheter retaining part pierce skin enter vein blood vessel, unclamp the negative pressure sac of pressing, in syringe needle Chamber forms negative pressure, and auxiliary Venous Blood pipe quickly shows blood back, it is judged that whether puncture needle comes into vein blood vessel；If worn Pricker comes into human vein blood vessel, the finger belly of thumb to needle handle surface with vertical angle or close to vertical angle reinforcement again Pressing, controlling operating element is that displacement component applies external force, displacement component drive syringe needle from just make state displacement to the first state, The i.e. tip portion of syringe needle is covered by conduit, and secondary propulsion bulb and syringe needle enter the correct position of vein.The design of this structure will Judge whether to enter vein and safe propulsion bulb is combined as a whole, make the operation of medical personnel all concentrate on grip needle handle On finger, and direction of operating is set to be vertical or near perpendicular to needle handle surface, and the force direction of two kinds of operations is consistent, not only Solve many deficiencies of the prior art, and make the use of medical personnel more convenient, and considerably increase puncture The puncture success rate of pin.

This utility model is provided with obstruct part at shell fragment middle lower surface, and this obstruct portion extrusion is connected with liquid chambers Pipeline inner chamber, makes the part medicinal liquid of needle lumen discharge, when needle tip part, catheter retaining part pierce skin enter vein Blood vessel, unclamps the pressing of obstruct part in the middle part of shell fragment, and needle lumen forms negative pressure, and auxiliary Venous Blood pipe quickly shows back Blood, it is judged that whether puncture needle comes into vein blood vessel；If puncture needle comes into vein blood vessel, the finger belly of thumb is to needle handle Surface presses with vertical angle or close to vertical angle reinforcement again, and controlling operating element shell fragment is that displacement component applies external force, Displacement component drives syringe needle to make state displacement be covered to the tip portion of the first state, i.e. syringe needle by conduit from just, and secondary advances Conduit and syringe needle enter the correct position of human vein.The design of this structure will determine that whether enter vein and safe pushing guidance equally Pipe is combined as a whole, and makes the operation of medical personnel all concentrate on the finger of grip needle handle, and direction of operating is set to hang down Straight or be approximately perpendicular to needle handle surface, the force directions of two kinds of operations are consistent, not only solve many deficiencies of the prior art, And make the use of medical personnel more convenient, and considerably increase the puncture success rate of puncture needle.

Accompanying drawing explanation

Fig. 1: for this utility model venipuncture needle the first embodiment entirety cutting structural representation；

Fig. 2: for this utility model venipuncture needle the first embodiment stereo decomposing structural representation；

Fig. 3: for this utility model venipuncture needle the first embodiment amagnified partial perspective structural representation；

Fig. 4: for this utility model venipuncture needle the first embodiment exploded structural representation；

Fig. 5: for this utility model venipuncture needle the first embodiment overall structure schematic diagram；

Fig. 6: for part A close-up schematic view in this utility model venipuncture needle the first embodiment Fig. 1；

Fig. 7: for part B close-up schematic view in this utility model venipuncture needle the first embodiment Fig. 1；

Fig. 8: for this utility model venipuncture needle the second embodiment biopsy cavity marker devices structural representation Fig. 1；

Fig. 9: for C portion close-up schematic view in this utility model venipuncture needle the second embodiment Fig. 8；

Figure 10: for this utility model venipuncture needle the second embodiment biopsy cavity marker devices structural representation Fig. 2；

Figure 11: for D part close-up schematic view in this utility model venipuncture needle the second embodiment Figure 10；

Figure 12: for this utility model venipuncture needle the second embodiment biopsy cavity marker devices structural representation Fig. 3；

Figure 13: for this utility model venipuncture needle the second embodiment biopsy cavity marker devices decomposition texture schematic diagram；

Figure 14: for this utility model venipuncture needle the 3rd embodiment perspective cut-away structural representation；

Figure 15: for this utility model venipuncture needle the 4th embodiment perspective cut-away structural representation；

Figure 16: for this utility model venipuncture needle the 4th embodiment entirety cutting structural representation；

Figure 17: for this utility model venipuncture needle the 5th embodiment perspective cut-away structural representation Fig. 1；

Figure 18: for this utility model venipuncture needle the 5th embodiment perspective cut-away structural representation Fig. 2；

Figure 19: for this utility model venipuncture needle the 5th embodiment entirety cutting structural representation；

Figure 20: for this utility model venipuncture needle operating element utricule biopsy cavity marker devices perspective view；

Figure 21: for this utility model venipuncture needle negative pressure sac biopsy cavity marker devices perspective view；

Figure 22: for this utility model venipuncture needle operating element, negative pressure sac relative position relation structural representation 1；

Figure 23: for this utility model venipuncture needle operating element, negative pressure sac relative position relation structural representation 2；

Figure 24: for this utility model venipuncture needle operating element, negative pressure sac relative position relation structural representation 3；

Figure 25: for this utility model venipuncture needle operating element, negative pressure sac relative position relation structural representation 4；

Figure 26: for this utility model venipuncture needle syringe needle side opening solid biopsy cavity marker devices structural representation；

Figure 27: use view 1 for puncture needle in prior art；

Figure 28: use view 2 for puncture needle in prior art；

Figure 29: use view 1 for this utility model venipuncture needle；

Figure 30: use view 2 for this utility model venipuncture needle；

Figure 31: use view 3 for this utility model venipuncture needle；

Figure 32: use view 4 for this utility model venipuncture needle；

Figure 33: use view 5 for this utility model venipuncture needle；

Figure 34: show view for this utility model venipuncture needle tip parts；

In figure: 1. needle body；11. conduits；111. conduit cavity；112. catheter retaining parts；113. conduits connect Part；1131. lateral wall；111a. conduit liquid outlet；111b. conduit inlet opening；12. syringe needles；121. tip portion；122. pin Head main body part；123. needle lumen；124. side opening；13. needle stands；131. needle stand inner chambers；132. needle stand front ends；1321. inner side Wall；133. needle stand rear ends；131a. liquid chambers；131b. withdraw of the needle chamber；134. buckle through holes；135. Transparence Display regions；14. isolation Plug；15. needle handles；151. needle handle first surfaces；152. needle handle second surfaces；16. position limiting structures；2. withdraw of the needle assembly；21. displacement portion Part；211. piston；212. buckle；212a. buckle is protruding；212b. the first buckle is protruding；212c. the second buckle is protruding；213. position Move main body；22. operating elements；221. utricule；221a. utricule inner chamber；222. tooth bar；223. gear；224. seesaw；225. it is convex Wheel；226. bevel gear；227. shell fragment；2271. fixing end；2272. middle part；2273. movable end；2274. obstruct part；At the beginning of 31. Beginning state；32. first states；33. second states；34. gaps；4. force application part；41. springs；5. tip parts；61. transfusions Pipeline；62. switch folders；63. positive pressure connectors；71. thumbs；72. vein blood vessels；73. forefingers；8. negative pressure sac；81. negative pressure cavities；9. Prior art operating element.

Detailed description of the invention

Embodiment 1:

As shown in figs. 1-7, a kind of venipuncture needle, including conduit 11, syringe needle 12, needle stand 13, batching pig 14, needle handle 15, Withdraw of the needle assembly 2, described conduit 11 uses polyurethane material or silica gel material to make, the overall clear tubular in inner hollow, its Inside is conduit cavity 111, and conduit cavity 111 one end open is conduit liquid outlet 111a, and other end opening is conduit inlet opening 111b, is catheter retaining part 112 near conduit liquid outlet 111a one end, is that conduit connects near conduit inlet opening 111b one end Part 113；Described syringe needle 12 uses stainless steel material to make, and this syringe needle 12 is similarly the tubulose of inner hollow, has in syringe needle Chamber 123, tip portion 121, needle main body part 122, described needle main body part 122 is contained in conduit cavity 111, and it is most advanced and sophisticated Part 121 stretches out the conduit liquid outlet 111a of conduit cavity 111；Described needle stand 13 uses propionic ester material or acrylonitrile-benzene second Alkene-butadiene copolymer material injection is made, and this needle stand 13 is internal is provided with needle stand inner chamber 131, the centre position of needle stand inner chamber 131 Being provided with rubber batching pig 14, described batching pig 14 uses interference fit, certainly, at batching pig 14 with the inwall of needle stand inner chamber 131 After installation puts in place, it is also possible to be adhesively fixed with medical glue, needle stand inner chamber 131 is divided into former and later two independent by above-mentioned batching pig 14 Cavity, for liquid chambers 131a near needle stand front end 132 with near the withdraw of the needle chamber 131b of needle stand rear end 133, above-mentioned conduit 11 Conduit cavity 111 be connected with liquid chambers 131a, the lateral wall of above-mentioned conduit connecting portion 113 1131 and needle stand front end 132 Medial wall 1321 fixing connect, use medical glue bonding or utilize that funnelform metallic pin is fixing to be connected；Described needle handle 15 Propionic ester material is used to make, overall in the lamellar facilitating human finger to hold, there is the needle handle the contacted with human finger One surface 151 and needle handle second surface 152, described needle handle 15 is connected with needle stand 13.As shown in Figure 2,3, 4, for realizing syringe needle 12 Relative to twice displacement of conduit 11, needle body 1 is provided with withdraw of the needle assembly 2, and this withdraw of the needle assembly 2 includes displacement component 21 He Operating element 22, described displacement component 21 is positioned at needle stand rear end 133, and a part is positioned at inside the 131b of withdraw of the needle chamber, and with syringe needle master The end of body portion 122 connects；Described operating element 22 is in the shell fragment 227 on needle handle first surface 151, this shell fragment 227 Using polypropylene to make with thermoplastic elastomer (TPE) TPE mixing material, described shell fragment 227 includes fixing end 2271, middle part 2272 and Movable end 2273, overall in the arch raised up, fixing end 2271 and movable end 2273 are positioned at arch two ends low spot, shell fragment The fixing end 2271 of 227 and needle handle 15 is fixing to be connected, and connected mode can be to snap connection or medical adhesive is bonding, shell fragment The movable end 2273 of 227 can be relative to needle handle 15 translation, and the middle part 2272 of vertical pressing shell fragment 227, because of 227, shell fragment Raw change of shape, fixing end 2271 maintains static, and shell fragment 227 movable end 2273 is parallel relative to needle handle 15 to rear side displacement, or Person's referred to as movable end 2273 moves to direction, needle stand rear end 133, and then contacts and promote displacement component 21 to needle stand rear end 133 side To movement, it is internal that described displacement component 21 drives syringe needle 12 tip portion 121 to be retracted into conduit cavity 111, syringe needle 12 tip portion 121 are covered by conduit 11, and syringe needle 12 is displaced to the first state 32 from original state 31, and syringe needle 12 tip portion 121 enters conduit Inner chamber 111 is internal, and now syringe needle 12 tip portion 121 will not stab or pierce through human vein blood vessel 72, can be with propulsion bulb 11 With the correct position that syringe needle 12 enters into human vein；When conduit 11 and syringe needle 12 have been introduced into human vein correct position After, to extract displacement component 21 thus drive syringe needle 12 to detach from conduit cavity 111, syringe needle 12 is displaced to second from the first state 32 State 33, completes the foundation of venous access.Above-mentioned syringe needle 12 is displaced to the first state 32 and the second state 33 from original state 31, Can be understood as conduit 11 not move, syringe needle 12 moves to direction, needle stand rear end 133 at conduit cavity 111, from initial shape State 31 is converted to the first state 32 and the second state 33.

As shown in Figure 29-33, judge whether syringe needle 12 comes into human vein blood vessel 72, the most just for convenience of medical personnel Prompt mode is for having seen whether vein blood back, but for the patient of venous pressure deficiency, it is extremely difficult for observing vein blood back. To this end, the lower surface of 2272 is provided with obstruct part 2274 in the middle part of above-mentioned shell fragment 227, described obstruct part 2274 is perpendicular to needle handle 15, push shrapnel in the middle part of 227 2272, this obstruct part 2274 is perpendicular to needle handle 15 direction and moves, and as shown in Fig. 2,3,5, punctures Pin is provided with infusion pipeline 61, switch folder 62, positive pressure connector 63, and described infusion pipeline 61 uses pvc material extrusion molding, This infusion pipeline 61 one end connects with liquid chambers 131a, and the other end is connected with positive pressure connector 63, the outer cover of infusion pipeline 61 It is provided with switch folder 62, can carry with the liquid within temporary interruption infusion pipeline 61.Liquid chambers 131a of above-mentioned needle stand front end 132 Directly connect with infusion pipeline 61, and a part of infusion pipeline 61 is internal through needle handle 15, sets on the upside of this infusion segment pipeline 61 There is obstruct part 2274.

The specifically used process of puncture needle is as follows: first allow medicinal liquid be full of inside puncture needle, and from syringe needle 12 tip portion 121 Drippage, closing switch folder 62, the liquid conveying within temporary interruption infusion pipeline 61.The first step: as shown in figure 29, medical personnel Thumb 71 and forefinger 73 pinch the needle handle 15 of needle body 1, its thumb 71 is positioned on needle handle first surface 151, forefinger 73 It is positioned on needle handle second surface 152, prepares to puncture；Second step, as shown in figure 30, uses the puncture needle vein blood vessel 72 to patient Thrust；3rd step, as shown in figure 31, utilizes in the middle part of the shell fragment on thumb 71 finger belly vertical pressing needle handle first surface 151 gently 2272, intercept part 2274 and be pressed down against infusion pipeline 61, make infusion pipeline 61 deform, by liquid chambers 131a and syringe needle Part medicinal liquid within chamber 123 is discharged, and shell fragment 227 mobile terminal 2273 moves horizontally inside needle handle 15 backward, because arranging gap 34, so displacement component 21 will not be promoted to move；4th step, as shown in figure 32, unclamps the thumb 71 pressing to shell fragment 227, bullet Sheet 227 is upspring, and has seen whether vein blood vessel 72 blood back by transparent conduit 11, if there is people at syringe needle 12 side opening 124 Vena systemica blood vessel 72 blood back, auxiliary judgment proves now needle body 1 syringe needle 12 tip portion 121 and catheter segment indwelling portion 112 are divided to be positioned at Venous Blood pipe 72 inside；5th step, as shown in figure 33, utilizes thumb 71 finger belly vertical pressing needle handle again In the middle part of shell fragment on first surface 151 2272, shell fragment 227 mobile terminal 2273 moves horizontally inside needle handle 15 backward, works as activity When end 2273 moves to contact with displacement component 21, drive displacement parts 21 drive syringe needle 12 to be displaced to first from original state 31 State 32, it is internal that the tip portion 121 of syringe needle 12 recedes into conduit cavity 111, and conduit 11 front end is smooth conduit liquid outlet 111a, medical personnel are with close to patient skin, but do not press the distance of patient skin, secondary propulsion bulb 11 and syringe needle 12 forward Entering the correct position of patient's vein, distance is in 15 to 25 millimeter；6th step, detaches syringe needle 12 from conduit cavity 111, takes out May is that medical personnel grip needle stand 13 grip displacement component 21 rear end on the other hand on the other hand from mode, rightabout force extracts pin 12 and displacement component 21, naturally it is also possible to continue to press down on operating element 22 and utilize frame for movement to make displacement component 21 related Syringe needle 12 is moved to the second state 33 from the first state 32.

Embodiment 2:

As shown in Figure 8, described operating element 22 is in the utricule 221 on needle handle first surface 151, and this utricule 221 is adopted Making with silica gel material, a kind of method is that utricule 221 flaky material is bonded on needle handle first surface 151, and the two is collectively forming Utricule inner chamber 221a, another kind of method is that bag-shaped utricule 221 is bonded on needle handle first surface 151, and bag-shaped utricule 221 has capsule Intracoelomic cavity 221a.Can be with preset fluid inside described utricule inner chamber 221a, described fluid is gas or liquid, utricule inner chamber 221a Being connected with withdraw of the needle chamber 131b, the fluid within utricule inner chamber 221a is filled with by the utricule 221 on pressing needle handle first surface 151 Withdraw of the needle chamber 131b, drive displacement parts 21 drive syringe needle 12 relative from just making state 31 be displaced to the first state 32, i.e. syringe needle 12 In conduit 11, displacement for the first time occurring, it is internal that syringe needle 12 tip portion 121 enters into conduit cavity 111, now propulsion bulb 11 The correct position entering vein is safe, it is to avoid syringe needle 12 tip portion 121 is unexpected pierces through vein blood vessel 72.As shown in Figure 4, When needing to detach syringe needle 12 conduit cavity 121 inside, finger grip displacement component 21 end, by needle stand front end 132 to needle stand There is second time displacement relative to conduit 11 in the pull-out of direction, rear end 133 syringe needle 12, i.e. syringe needle 12, is displaced to the from the first state 32 Two-state 33.

As shown in figure 12, for making displacement component 21 drive syringe needle 12 to obtain when original state 31 is displaced to the first state 32 Spacing, it is to avoid displacement is not enough or over-travel, is provided with mutually between described displacement component 21 outer wall and needle stand rear end 133 inwall The position limiting structure 16 coordinated, the specially groove on the inwall of needle stand rear end 133 and the flange collar on displacement component 21 outer wall, the two is The concaveconvex structure cooperated, when displacement component 21 drive syringe needle 12 after original state 31 is displaced to the first state 32, flange collar Enter inside grooves, continue displacement for displacement component 21 and apply certain resistance.Certainly, need to detach pin from conduit cavity 111 When 12, the power outwards detached that human finger applies can overcome the resistance that position limiting structure 16 groove and flange collar produce, smoothly Syringe needle 12 is made to be displaced to the second state 33 from the first state 32.

Embodiment 3:

Such as Fig. 8, shown in 10, for ensureing the mild property of displacement component 21 withdraw of the needle, displacement component 21 connects and has piston 211, described piston 211 is made up of silica gel material, is positioned at inside the 131b of withdraw of the needle chamber, is connected with syringe needle 12, its piston 211 outer wall With withdraw of the needle chamber 131b inwall packaged type smooth engagement, when human finger pressing needle handle first surface 151 on utricule 221 by capsule Fluid within intracoelomic cavity 221a be filled with withdraw of the needle chamber 131b internal time, can drive piston 211 to needle stand rear end 133 direction displacement, Syringe needle 12 is driven to be displaced to the first state 32 from original state 31.Gap between piston 211 outer wall and withdraw of the needle chamber 131b inwall Being easier to be controlled in the fabrication process, and piston 211 is integrally located at inside the 131b of withdraw of the needle chamber, external force cannot interfere with work Plug 211 is in the displacement within the 131b of withdraw of the needle chamber.

As shown in Fig. 8,9,10,11, for making displacement component 21 drive syringe needle 12 to be displaced to the first state from original state 31 Obtain spacing when 32, it is to avoid displacement is not enough or over-travel, and the end of above-mentioned needle main body part 122 is provided with T-shaped structure, position Move parts 21 being positioned at the part within the 131b of withdraw of the needle chamber is displaceable body 213, and this displaceable body 213 is provided with and this T-shaped structure The movable span matched, when piston 211 is to needle stand rear end 133 direction displacement, needed for movable span is for T-shaped structure offer activity Space length, this space length can ensure that syringe needle 12 is displaced to the first state 32 relative to conduit 11 from original state 31.When So, described piston 211 can need not arrange T-shaped structure and movable span with unitary design, when piston 211 with displacement component 21 Common with displacement component 21 to needle stand rear end 133 direction displacement, after original state 31 is displaced to first this segment distance of state 32, It is outside that piston 211 and displacement component 21 are exposed to needle stand 13 jointly, and withdraw of the needle chamber 131b is connected with ambient atmosphere, drives the most again Utricule 221 also will not be subjected to displacement parts 21 displacement, it is to avoid displacement is not enough or over-travel.

As shown in figure 13, when needs detach syringe needle 12 from conduit cavity 111, human finger grip displacement parts 21 naked Dew part, exerts a force to direction, needle stand rear end 133, and the movable span of above-mentioned displaceable body 213 hooks needle main body part 122 end T-shaped structure, drive syringe needle 12 detach from the conduit cavity 111 of conduit 11, make syringe needle 12 be displaced to from the first state 32 smoothly Second state 33.

Embodiment 4:

As shown in figure 14, described operating element 22 is in the tooth bar 222 within needle handle 15 and gear 223, described tooth bar 222 and gear 223 engage each other, use self-lubricating engineering plastics material injection makes.Above-mentioned tooth bar 222 is perpendicular to needle handle 15 table Face is arranged, and tooth bar 222 periphery is provided with tooth bar guide groove, and this tooth bar guide groove has guide function and limit function to tooth bar 222；Above-mentioned Gear 223 is provided with power transmission shaft, and the power transmission shaft other end is provided with dismountable gear train, and gear train is made up of two gears, one Fixing with power transmission shaft being connected, another is detachable with displacement component 21 is connected, and this detachable connection is interpreted as that gear is permissible At withdraw of the needle chamber 131b internal rotating and be fixed on displacement component 21, when displacement component 21 needs to drive syringe needle 12 from conduit 11 When conduit cavity 111 detaches, this gear moves together with displacement component 21.During use, pressing is perpendicular to the tooth bar of needle handle 15 222, described tooth bar 222, under the guide effect of tooth bar guide groove, moves downward and drives the gear 223 engaged to rotate, tooth Wheel 223 utilizes power transmission shaft drive gear set to rotate, and the external force of rotation drives syringe needle 12 to be displaced to the first state from original state 31 32.Specific implementation is that the end of needle main body part 122 connects the steel wire having softness, and steel wire winding can at displacement component 21 On the gear being detachably connected with, gear rotates the steel wire that scrolling is soft, makes syringe needle 12 be displaced to the first state from original state 31 32, when external force extracts displacement component 21, this displacement component 21 and the gear connected on it move to direction, needle stand rear end 133 jointly Dynamic, the soft steel wire of connection pulls needle main body part 122, makes syringe needle 12 entirety detach conduit cavity 111, from the first state 32 It is displaced to the second state 33.

Embodiment 5:

As shown in Figure 15,16, described operating element 22 is in the seesaw 224 within needle handle 15, uses plastic material note Moulding and make, needle handle 15 is internal is provided with the strong point supporting seesaw 224, and seesaw 224 can prize up and down around the strong point, at seesaw One end of 224 is provided with stage clip, keeps the one end arranging stage clip to tilt around the strong point, and one end of this tilting is human finger pressing One end.Described displacement component 21 is in the buckle 212 within the 131b of withdraw of the needle chamber, and this buckle 212 is by having resilient metal Material or plastic material are made, and are connected with the end of syringe needle 12, which is provided with buckle projection 212a, this buckle projection 212a position Buckle through hole 134 in needle stand rear end 133 is internal.During use, the seesaw 224 on vertical pressing needle handle 15, seesaw 224 is around propping up Support point rotates, and buckle projection 212a touched on buckle 212 is lifted in the one end hung low, and makes buckle projection 212a exit buckle through hole 134 is internal, and buckle 212 utilizes natural resiliency to be subjected to displacement inside the 131b of withdraw of the needle chamber, direction of displacement be from needle stand front end 132 to Needle stand rear end 133 is moved, and now buckle 212 drives syringe needle 12 to be displaced to the first state 32 from original state 31.

Embodiment 6:

As shown in Figure 17,18,19, described needle body 1 is provided with force application part 4, and described force application part 4 is specially bullet Spring 41, this spring 41 is connected with buckle 212, and buckle 212 can be driven to drive syringe needle 12 to be displaced to first from original state 31 State 32 and the second state 33.Concrete mode is to arrange the first buckle projection 212b and the second buckle projection on buckle 212 212c, it is internal that described first buckle projection 212b and the second buckle projection 212c are respectively positioned on buckle through hole 134, utilizes operating element First buckle projection 212b and the second buckle projection 212c are released buckle through hole 134 by 22, and spring 41 can be executed for buckle 212 displacement Add external force, assist it to drive syringe needle 12 to be displaced to the first state 32 and the second state 33 from original state 31.Certainly, as Figure 17, Shown in 18, described operating element 22 can be that tooth bar 222 and gear 223 and bevel gear 226, cam 225 form, described cam 225 is dish type push cam, and its middle rack 222 is perpendicular to needle handle 15 and arranges, and vertical pressing tooth bar 222 driven gear 223 rotates, Gear 223 utilizes power transmission shaft to drive bevel gear 226 to rotate, and final band moving cam 225 rotates, and it is convex that cam 225 contacts the first buckle It being released in buckle through hole 134 after playing 212b, spring 41 pulls buckle 212, thus drives syringe needle 12 from original state 31 Being displaced to the first state 32, it is internal that syringe needle 12 tip portion 121 enters conduit cavity 111.The bossing of above-mentioned cam 225 pushes away After going out the first buckle projection 212b, no longer touch the second buckle projection 212c, keep the second buckle projection 212c at buckle through hole 134 is internal, when human finger continues pressing operating element 22, makes the bossing of cam 225 rotate to contact the second buckle convex When playing 212c, the second buckle projection 212c being released in buckle through hole 134, spring 41 pulls buckle 212 again, so that card Button 212 drive syringe needle 12 is displaced to the second state 33 from the first state 32, and syringe needle 12 entirety detaches from conduit cavity 111.To this end, Above-mentioned second buckle projection 212c is more bigger than in the first buckle projection 212b size, so contributes to both and the most first retreats Go out buckle through hole 134 internal.

Embodiment 7:

As shown in figure 20, needle handle 15 surface configuration utricule 221, pressing utricule 221 is filled with fluid for withdraw of the needle chamber 131b, fluid Drive the displacement component 21 within the 131b of withdraw of the needle chamber, thus drive syringe needle 12 to be displaced to the first state 32 from original state 31.As Shown in Figure 21, described needle handle 15 being additionally provided with negative pressure sac 8, this negative pressure sac 8 uses revertible elastomeric material to make, preferably Silica gel material is made.Described negative pressure sac 8 is internal is provided with negative pressure cavity 81, this negative pressure cavity 81 and liquid chambers 131a and needle lumen 123 Being connected, human finger finger belly vertically presses to negative pressure sac 8, by the medicinal liquid part within liquid chambers 131a and needle lumen 123 Discharging, now unclamp negative pressure sac 8, liquid chambers 131a and needle lumen 123 in negative pressure cavity 81 connection are internally formed negative pressure, human body Blood within vein blood vessel 72 is inhaled into needle lumen 123, is used for assisting quick blood back.In order to quickly show blood back, such as figure Shown in 26, being provided with side opening 124 on syringe needle 12 outer wall of syringe needle 12 tip portion 121, this side opening 124 is contained in conduit Chamber 111 is internal, because conduit 11 is pellucidity, so through conduit 11 it can be seen that quickly show blood back at side opening 124.

Embodiment 8:

As shown in Fig. 8,9,10,11, a kind of venipuncture needle, including conduit 11, syringe needle 12, needle stand 13, batching pig 14, pin Handle 15, withdraw of the needle assembly 2, negative pressure sac 8, described conduit 11 uses polyurethane material or silica gel material to make, overall in inner hollow Clear tubular, it is internal is conduit cavity 111, and conduit cavity 111 one end open is conduit liquid outlet 111a, other end opening For conduit inlet opening 111b, it is catheter retaining part 112 near conduit liquid outlet 111a one end, near conduit inlet opening 111b mono- End is conduit connecting portion 113；Described syringe needle 12 uses stainless steel material to make, and this syringe needle 12 is similarly the pipe of inner hollow Shape, has needle lumen 123, tip portion 121, needle main body part 122, and described needle main body part 122 is contained in conduit Inner chamber 111 is internal, and its tip portion 121 stretches out the conduit liquid outlet 111a of conduit cavity 111；Described needle stand 13 uses propionic ester Material injection is made, and this needle stand 13 is internal is provided with needle stand inner chamber 131, and the centre position of needle stand inner chamber 131 is provided with rubber batching pig 14, described batching pig 14 and needle stand inner chamber 131 inwall interference fit, certainly, after batching pig 14 is installed and is put in place, it is also possible to doctor Being adhesively fixed with glue, needle stand inner chamber 131 is divided into former and later two independent cavitys by above-mentioned batching pig 14, near needle stand front end Liquid chambers 131a of 132 and the withdraw of the needle chamber 131b near needle stand rear end 133, liquid chambers 131a does not connect with withdraw of the needle chamber 131b, Described needle main body part 122 passes batching pig 14, but when syringe needle 12 detaches conduit cavity 111 inside, described batching pig Liquid chambers 131a and withdraw of the needle chamber 131b are separated by 14, and will not leave behind syringe needle 12 by time through hole, mainly due to batching pig 14 use the quality of rubber materials with elastic recovery capability to make.The conduit cavity 111 of above-mentioned conduit 11 is connected with liquid chambers 131a Logical, the lateral wall 1131 of above-mentioned conduit connecting portion 113 is fixing with the medial wall 1321 of needle stand front end 132 to be connected, and uses medical Glue bonds or utilizes the fixing connection of funnelform metallic pin；Described needle handle 15 uses silica gel material to make, overall in facilitating people The lamellar that body finger holds, has the needle handle first surface 151 and needle handle second surface 152 contacted with two fingers of human body, Described needle handle 15 is connected with needle stand 13.Such as Fig. 8, shown in 10, for realizing the syringe needle 12 twice displacement relative to conduit 11, puncture needle Main body 1 is provided with withdraw of the needle assembly 2, and this withdraw of the needle assembly 2 includes that displacement component 21 and operating element 22, described displacement component 21 are positioned at Needle stand rear end 133, a part is positioned at inside the 131b of withdraw of the needle chamber, and is connected with needle main body part 122 end of syringe needle 12；Described Operating element 22 is in the utricule 221 on needle handle first surface 151, and this utricule 221 uses silica gel material to make, a kind of method Being that utricule 221 flaky material is bonded on needle handle first surface 151, the two is collectively forming utricule inner chamber 221a, another kind of method Being that bag-shaped utricule 221 is bonded on needle handle first surface 151, bag-shaped utricule 221 has utricule inner chamber 221a, described utricule inner chamber Can be with preset fluid inside 221a, described fluid is gas or liquid, and utricule inner chamber 221a is connected with withdraw of the needle chamber 131b, pressing Fluid within utricule inner chamber 221a is filled with withdraw of the needle chamber 131b, drive displacement parts by the utricule 221 on needle handle first surface 151 21 drive syringe needles 12 relative to conduit 11, displacement for the first time to occur from just making state 31 be displaced to the first state 32, i.e. syringe needle 12, Syringe needle 12 tip portion 121 enters into conduit cavity 111, and now propulsion bulb 11 enters the correct position of vein is safe, Syringe needle 12 tip portion 121 is avoided surprisingly to pierce through vein blood vessel 72.As shown in Figure 4, syringe needle 12 is needed to detach from conduit cavity 111 Time, finger grip displacement component 21 end, by needle stand front end 132 to direction, needle stand rear end 133 force pull-out syringe needle 12, i.e. syringe needle 12 there is second time displacement relative to conduit 11, are displaced to the second state 33 from the first state 32.As it is shown in figure 5, on puncture needle Being additionally provided with infusion pipeline 61, switch folder 62, positive pressure connector 63, described infusion pipeline 61 uses pvc material extrusion molding, This infusion pipeline 61 one end connects with liquid chambers 131a, and the other end is connected with positive pressure connector 63, the outer cover of infusion pipeline 61 It is provided with switch folder 62, can carry with the liquid within temporary interruption infusion pipeline 61.

A technical scheme that operating element is positioned on needle handle 15 is had disclosed in prior art, but prior art operating element 9 need to occur translation to be returned to inside conduit cavity by syringe needle 12 tip portion 121 with needle handle 15 surface.Above-mentioned existing Having technology to there is the risk of damage vein in implementation process, concrete condition brief analysis is as follows, such as Figure 27, shown in 28, and medical care The needle handle 15 of the finger grip puncture needle of personnel, is ready for puncture for treating, and syringe needle 12 tip portion 121 enters the vein of patient In blood vessel 72, now need to be retracted into inside conduit cavity by syringe needle 12 tip portion 121, in order to secondary is pushed pin to Venous Blood The correct position of pipe 72；The finger of now medical personnel's grip needle handle 15 extreme direction after needle stand promotes prior art operating element 9, this promotion is finger finger belly and the relative displacement in the parallel direction of needle handle 15 surface, can be construed to rubbing prior art behaviour Control parts 9, the mode of this rubbing prior art operating element 9 returns to the same of conduit cavity making syringe needle 12 tip portion 121 Time, syringe needle 12 tip portion 121 can be allowed to provoke up or down, as easy as rolling off a log appearance is upwards needled vein blood vessel wall or stings downwards The risk of perforating veins blood vessel wall, thus the vein blood vessel 72 of patient is caused accidental injury.

As shown in figure 21, described needle handle first surface 151 is not only provided with operating element 22, is additionally provided with negative pressure sac 8.Such as figure Shown in 22, described negative pressure sac 8 is positioned at operating element 22 top, and the two layered laminate is arranged, wherein the negative pressure cavity 81 of negative pressure sac 8 with wear Liquid chambers 131a and the needle lumen 123 of lancet body 1 are connected, the utricule inner chamber 221a of operating element 22 utricule 221 with move back Pin chamber 131b is connected, and the two is non-interference.Concrete operation step is: the first step, and positive pressure connector 63 will need the medicinal liquid of conveying It is introduced to the tip portion 121 of syringe needle 12, then the infusion pipeline 61 of puncture needle switch folder 62 folder is closed；Second step, medical care Thumb 71 and the forefinger 73 of personnel pinch the needle handle 15 of puncture needle, and its thumb 71 is positioned on needle handle first surface 151,73, forefinger On needle handle second surface 152, thumb 71 finger belly is utilized to press lightly on the negative pressure sac 8 on needle handle first surface 151；3rd step, Use puncture needle to thrust to the vein blood vessel 72 of patient, unclamp the negative pressure sac 8 of thumb 71 pressing, at the side opening 124 of syringe needle 12 See and quickly show that blood back, auxiliary judgment prove now needle body 1 syringe needle 12 tip portion 121 and catheter segment indwelling portion 112 are divided to be positioned at Venous Blood pipe 72 inside；4th step, thumb 71 pressing of medical personnel is positioned at negative pressure sac 8 manipulation below Parts 22, i.e. utricule 221, be filled with fluid for withdraw of the needle chamber 131b, and drive displacement parts 21 drive syringe needle 12 from original state 31 Moving on to the first state 32, it is internal that the tip portion 121 of syringe needle 12 recedes into conduit cavity 111, and conduit 11 front end is smooth leading Pipe liquid outlet 111a；5th step, medical personnel are with close to patient skin, but do not press the distance of patient skin, and secondary pushes away forward Entering conduit 11 and syringe needle 12 enters the correct position of patient's vein, distance is in 15 to 25 millimeter；6th step, from conduit cavity 111 detach syringe needle 12, and the mode of detaching can be medical personnel's finger grip displacement component 21 rear end, extracts syringe needle 12 and displacement portion Part 21, it is also possible to continue to press down on operating element 22 and utilize frame for movement to make the related syringe needle of displacement component 21 12 detach.Above-mentioned Needed for pressing negative pressure sac 8, externally applied forces is less than externally applied forces needed for pressing operating element 22.

As shown in figure 23, described negative pressure sac 8 and operating element 22 partly overlap setting, and medical personnel's thumb 71 finger belly is divided into Two regions, a part of region is used for pressing negative pressure sac 8, auxiliary judgment syringe needle 12 tip portion 121 and catheter segment indwelling portion 112 are divided to be positioned at Venous Blood pipe 72 inside；Another part region is used for pressing operating element 22, it is achieved syringe needle 12 makes shape from just State 31 is displaced to the first state 32 and the second state 33.Said structure is designed with beneficially medical personnel's separate operations, also will not go out The fortuitous event that syringe needle 12 tip portion about 121 now caused because of the action of medical personnel's thumb 71 is provoked.

As shown in figure 24, described negative pressure sac 8 is positioned on needle handle second surface 152, and operating element 22 is positioned at needle handle the first table On face 151, the two is oppositely arranged, and the external force needed for above-mentioned pressing negative pressure sac 8 is less than the external force needed for pressing operating element 22, doctor Forefinger 73 finger belly protecting personnel contacts with negative pressure sac 8, and thumb 71 finger belly contacts with operating element 22.During use, first with food Refer to that 73 finger belly pressing negative pressure sacs 8 form negative pressure, assist quick blood back, then press operating element 22 by thumb 71 finger belly, it is achieved pin 12 make state 31 be displaced to the first state 32 and the second state 33 from just.This structure is designed with the separate operation of beneficially finger.

As shown in figure 25, described negative pressure sac 8 and operating element 22 are co-located on needle handle first surface 151, and the two it Between have certain distance, medical personnel's thumb 71 finger belly to be divided into two regions, a part of region be used for press negative pressure sac 8, another portion Subregion is used for pressing operating element 22, and this structure is designed with beneficially processing and manufacturing.

As shown in figure 34, described needle body 1 also includes tip parts 5, and this tip parts 5 can be arranged on displacement portion On part 21, need to mark English, Chinese character, symbol on the outer wall of displacement component 21 displaceable body 213.Described needle stand 13 is provided with Transparence Display region 135, tip parts 5 is positioned at side, needle stand 13 Transparence Display region 135, when displacement component 21 drives syringe needle 12 When original state 31 is displaced to the first state 32, this tip parts 5 is in company with displacement component 21 together displacement, and shows transparent Occur in showing region 135.Above-mentioned Transparence Display region 135 is the region of the one section of pellucidity arranged in needle stand rear end 133, excellent Needle selection seat 13 main body is opaque state, and only Transparence Display region 135 is pellucidity, is so provided with and prompting beneficially occurs It is more prone to during parts 5 be found.

Claims

1. a venipuncture needle, including:

Conduit (11), this conduit (11) is the clear tubular of inner hollow, has conduit cavity (111), catheter retaining part (112), conduit connecting portion (113), conduit cavity (111) one end is conduit liquid outlet (111a), and the other end is conduit feed liquor Hole (111b)；

Syringe needle (12), this syringe needle (12) is the tubulose of inner hollow, has needle lumen (123), tip portion (121), syringe needle Main part (122), described needle main body part (122) is contained in conduit cavity (111), and its tip portion (121) stretches out leads The conduit liquid outlet (111a) of tube cavity (111)；

Needle stand (13), this needle stand (13) has a needle stand inner chamber (131) of inner hollow, and after needle stand front end (132) and needle stand End (133), wherein needle stand inner chamber (131) is internal is provided with batching pig (14), and needle stand inner chamber (131) is divided into by this batching pig (14) Liquid chambers (131a) and withdraw of the needle chamber (131b), described liquid chambers (131a) is connected with the conduit cavity (111) of conduit (11), pin Seat front end (132) medial wall (1321) is tightly connected with conduit connecting portion (113) lateral wall (1131)；

Needle handle (15), the lamellar that this needle handle (15) holds for convenience of human finger, there is needle handle the first table contacted with finger Face (151) and needle handle second surface (152)；

It is characterized in that,

Also including withdraw of the needle assembly (2), this withdraw of the needle assembly (2) includes displacement component (21) and operating element (22), institute's displacing portion Part (21) is positioned at needle stand rear end (133), is connected with needle main body part (122) end, and displacement component (21) drives syringe needle (12) Carrying out displacement at least one times, displacement component (21) drives syringe needle (12), relative to conduit (11), displacement for the first time, syringe needle occur (12) being displaced to the first state (32) from original state (31), the tip portion (121) of syringe needle (12) enters conduit cavity (111)；Displacement component (21) drives syringe needle (12), relative to conduit (11), second time displacement occurs, and syringe needle (12) is from the first state (32) being displaced to the second state (33), syringe needle (12) detaches from conduit cavity (111)；Described operating element (22) is positioned at needle handle (15), on, there is not the situation of relative displacement at finger relative to needle handle first surface (151) or needle handle second surface (152) Under, finger externally applied forces is transferred on displacement component (21) by operating element (22).

Venipuncture needle the most according to claim 1, it is characterised in that described operating element (22) is in needle handle (15) The shell fragment (227) of upper arch, described shell fragment (227) includes fixing holds (2271), and middle part (2272) and movable end (2273) are described Fixing end (2271) is fixing with needle handle (15) to be connected, and presses down on shell fragment (227) middle part (2272), drives shell fragment (227) movable End (2273) moves to displacement component (21) direction, place, when movable end (2273) drive displacement parts (21) drive syringe needle (12) When original state (31) is displaced to the first state (32), syringe needle (12) is the most mobile to needle stand rear end (133) direction, syringe needle (12) tip portion (121) enters conduit cavity (111).

Venipuncture needle the most according to claim 2, it is characterised in that described shell fragment (227) movable end (2273) and position Moving and be provided with gap (34) between parts (21), shell fragment (227) middle part (2272) lower surface is provided with obstruct part (2274), liquid chambers (131a) the elastic pipeline being connected touches with obstruct part (2274) bottom connection, presses down on shell fragment (227) middle part (2272), Intercept the inner chamber of the elastic pipeline of part (2274) extruding, extrude the original partially liq of pipeline inner chamber, unclamp in shell fragment (227) The pressing in portion (2272), in the middle part of shell fragment (227), (2272) upspring, and the pipeline being connected with liquid chambers (131a) recovers, at liquid Chamber (131a) and needle lumen (123) form negative pressure, and the blood in human vein is inhaled into needle lumen (123) and conduit cavity (111).

Venipuncture needle the most according to claim 1, it is characterised in that described operating element (22) is in needle handle (15) On utricule (221), this utricule (221) has the utricule inner chamber (221a) of preset fluid, its utricule inner chamber (221a) and withdraw of the needle (131b) is connected in chamber, and is filled with fluid for withdraw of the needle chamber (131b), utilizes fluid pressure actuated displacement component (21) to drive syringe needle (12) it is displaced to the first state (32) from original state (31).

Venipuncture needle the most according to claim 4, it is characterised in that described displacement component (21) includes being positioned at withdraw of the needle chamber (131b) internal piston (211), this piston (211), at withdraw of the needle chamber (131b) internal displacement, drives syringe needle (12) from initial shape State (31) is displaced to the first state (32).

Venipuncture needle the most according to claim 5, it is characterised in that described displacement component (21) is provided with position limiting structure (16), displacement component (21) drives syringe needle (12) to be displaced to the first state (32), this position limiting structure (16) from original state (31) For stoping displacement component (21) to drive syringe needle (12) to continue displacement.

Venipuncture needle the most according to claim 1, it is characterised in that described operating element (22) is in needle handle (15) On tooth bar (222) and gear (223), described tooth bar (222) and gear (223) engage each other, tooth bar (222) is relative to needle handle (15) vertical direction is subjected to displacement, and presses down on tooth bar (222) thus driven gear (223) rotation；Described gear (223) with Displacement component (21) connects, and gear (223) rotarily drives displacement component (21) and is subjected to displacement or rotates, and displacement component (21) carries Dynamic syringe needle (12) is displaced to the first state (32) from original state (31).

Venipuncture needle the most according to claim 1, it is characterised in that described operating element (22) is in needle handle (15) On seesaw (224), this seesaw (224) controls described displacement component (21), presses down on seesaw (224) drive displacement parts (21) syringe needle (12) is driven to be displaced to the first state (32) and the second state (33) from original state (31)；Described displacement component (21) being in the buckle (212) of withdraw of the needle chamber (131b), described buckle (212) is connected with needle main body part (122) end, its Being provided with buckle protruding (212a), needle stand rear end (133) are provided with buckle through hole (134), and buckle protruding (212a) is positioned at buckle and leads to When hole (134) is interior, syringe needle (12) is in original state (31), and syringe needle (12) tip portion (121) stretches out conduit cavity (111) Conduit liquid outlet (111a)；Buckle protruding (212a) exit buckle through hole (134) interior time, syringe needle (12) is in the first state (32), syringe needle (12) tip portion (121) enters conduit cavity (111).

Venipuncture needle the most according to claim 8, it is characterised in that also include force application part (4), described force application part (4) being spring (41), this spring (41) is connected with buckle (212), is used for driving buckle (212) to drive syringe needle (12) from initially State (31) is displaced to the first state (32) and the second state (33), when buckle protruding (212a) is positioned at buckle through hole (134), Spring (41) is in compression or extended state；Buckle protruding (212a) exit buckle through hole (134) interior time, spring (41) recovers former Shape, applies external force to buckle (212).

Venipuncture needle the most according to claim 9, it is characterised in that it is convex that described buckle (212) is provided with the first buckle Playing (212b) and the second buckle is protruding (212c), described first buckle protruding (212b) and the second buckle protruding (212c) are positioned at card When button through hole (134) is interior, spring (41) is in compression or extended state, and syringe needle (12) is in original state (31), syringe needle (12) Tip portion (121) stretches out the conduit liquid outlet (111a) of conduit cavity (111)；First buckle protruding (212b) exits buckle and leads to When hole (134) is interior, the part reinstatement of spring (41), syringe needle (12) is in the first state (32), syringe needle (12) point (121) are divided to enter conduit cavity (111)；First buckle protruding (212b) and the second buckle protruding (212c) exit buckle through hole (134), time interior, spring (41) restores to the original state, and syringe needle (12) is in the second state (33), and syringe needle (12) is taken out from conduit cavity (111) From.

11. according to the arbitrary described venipuncture needle of claim 1-10, it is characterised in that described needle handle (15) is provided with to be had The negative pressure sac (8) of elastic recovery capability, this negative pressure sac (8) is internal is provided with negative pressure cavity (81), this negative pressure cavity (81) and liquid chambers (131a) and needle lumen (123) is connected, after human finger exerts a force to negative pressure sac (8) and unclamps negative pressure sac (8), negative pressure cavity (81) liquid chambers (131a) connected and needle lumen (123) form negative pressure.

12. venipuncture needles according to claim 11, it is characterised in that described negative pressure sac (8) and operating element (22) Being co-located on needle handle (15) surface, the same side, a part of region of human finger exerts a force to negative pressure sac (8), another part district Territory operating element (22) force to withdraw of the needle assembly (2).

13. venipuncture needles according to claim 11, it is characterised in that at least some of described negative pressure sac (8) with Operating element (22) overlaps on needle handle first surface (151) or needle handle second surface (152), and human finger first contacts negative Pressure capsule (8) also exerts a force to negative pressure sac (8), continues the operating element (22) of force contact withdraw of the needle assembly (2).

14. venipuncture needles according to claim 11, it is characterised in that described negative pressure sac (8) is positioned at needle handle the first table On face (151) or needle handle second surface (152), the operating element (22) of withdraw of the needle assembly (2) is positioned at the side that needle handle (15) is contrary.

15. according to the arbitrary described venipuncture needle of claim 12-14, it is characterised in that described syringe needle (12) is contained in leads The part of tube cavity (111) is provided with the needle lumen (123) of at least one side opening (124), this side opening (124) and syringe needle (12) Communicate.

16. venipuncture needles according to claim 15, it is characterised in that also include tip parts (5), described needle stand (13) being provided with Transparence Display region (135), tip parts (5) is positioned at needle stand (13) Transparence Display region (135) side, syringe needle (12) when original state (31) is displaced to the first state (32), this tip parts (5) is aobvious in Transparence Display region (135) Show.