CN108434550A - A kind of safe type venous retaining needle - Google Patents

Abstract

A kind of safe type venous retaining needle, including：Needle tubing, needle tubing seat, casing；Needle tubing seat is socketed each other with casing seat, and what the part of socket can be oriented to each other axially slides relative, and the axial axis refers to the central axis of needle tubing and casing；At least one elasticity part including compressed spring may be selected that can be deformed upon by external force is equipped between needle tubing seat and casing seat；Further include at least one needle tubing seat handle that can be linked together with needle tubing seat, is set on needle tubing seat handle there are one the lower contact component that can touch casing seat can be driven in external force；The contact component can be the region that can touch casing seat on needle tubing seat handle；Can also be the movable part that can be deformed upon by external force extended from needle tubing seat handle, a such as sheet on needle tubing seat handle extends, at least one position is contacted with a part of region of casing seat on contact component.

Description

A kind of safe type venous retaining needle

Technical field

The present invention relates to a kind of safe type venous retaining needles, belong to the field of medical instrument technology.

Background technology

Venipuncture and related venous transfusion are a kind of the most commonly used general technologies in clinical departments room, work as transfusion time The most-often used remaining needle with flexible sleeve when longer, casing flexible is eliminated because of syringe tip terminal spine perforating veins during indwelling Risk；No matter which kind of intravenous needle all inevitably faces the challenge of individuation venipuncture procedure, and the individuation refers to Skin thickness, skin hardness, vein degree of exposure, vein thickness, the vein depth, wall of vein hardness, the vein of patient is bent journey Degree, venous valve distribution etc. differ widely；What individuation venipuncture must also consider is the personalization of nurse operation.

In general, using the venipuncture procedure of remaining needle, the neighbouring skin of disinfection point of puncture, the finger of subsequent proficiency when beginning Sharp syringe tip terminal spine is first entered skin by mainly thumb taught skin, another hand-held needle with skin in a suitable angle, Wall of vein is then broken through, the pin hole of needle tubing tip ramp enters duct of Arantius intracavitary, and vein pressure squeezes blood via the pin hole on inclined-plane Enter needle tubing, sees that red blood flows on needle tubing form or transparent needle tubing seat or transparent hose, also referred to as blood back, as Judge that the pin hole on inclined-plane enters the foundation of vein tube chamber；This blood back mode is the passive blood back of vein pressure dependence.However, more Kind of factor visible blood back can not occur causing the pin hole even if inclined-plane to enter vein tube chamber, such as when vein pressure is very low, The shock patients of common inadequate circulatory blood volume, thus the passive blood back mode of vein pressure dependence is extremely insensitive；For another example close to The unidirectional flow control effect of the pin hole on the inclined-plane of venous valve, venous valve makes blood difficultly flow into needle tubing；For another example the inclined-plane of pin hole is close to Wall of vein makes blood cannot be introduced into needle tubing；Also as the inclined-plane of pin hole is located at vein knee；When there are these feelings for having no blood back Condition, operator have been generally acknowledged that pin hole not yet enter vein tube chamber, needle tubing can be pushed further into so that from side vein tube wall into The needle tubing tip of vessel lumen in meditation is easily pierced by from offside vein tube wall, i.e., vein is run through by needle tubing, and venipuncture is caused to fail, Vein tube chamber cannot be entered in first time and can cause by seriously affecting the infusion of drug and liquid, especially first aid medicine or blood The rapid dead or irreversible organ failure of patient.

Even if however, having seen blood back in puncturing, also need to continue needle tubing to promote certain distance to intravenous, it is ensured that inclined-plane Pin hole cmpletely enter duct of Arantius intracavitary, when vein move towards naked eyes can not judge when the step for needle tubing promote completely To implement in the state of blindness, the tip direction of travel of needle tubing easily cause when moving towards slightly different with vein vein by through Cause puncture failure, especially patient's vein to move towards not visible and when vein tube chamber is smaller safe inserting needle is almost extravagantly hoped；In order to keep away Exempt from continue inserting needle process pierce through vein risk, operating method see blood back after needle tubing rollback 1mm-4mm is differed Then casing is sent into vein tube chamber by distance, though having certain effect rollback that needle tubing tip is easily made to be detached from vein tube chamber causes Puncture failure, because of most of targeted vein internal diameters only 2mm or so.

Furthermore the foliaceous handle of the clinical manipulation horizontality that retention needle tube seat dominated by hand is connected mostly, thumb In upper index finger under, the index finger below needle tubing seat inevitably touches the skin of the neighbouring point of puncture after just sterilizing Skin, when there being microorganism on index finger, easily pollution point of puncture causes pipeline related blood stream infections (CRBSI) (to have and largely face Bed reported in literature)；And index finger between skin and needle tubing seat can also influence needle angle when operating, i.e., needle tubing and skin it Between angle selection namely needle tubing and needle tubing vertical projecting line on the skin between the selection of best angle can be clipped in The interference of index finger therebetween finally reduces puncture success rate when especially selecting smaller best needle angle.

In short, there are following serious security problems for the remaining needle of existing Clinical practice：

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

2. the passive blood back mode of vein pressure dependence to force down when patient's vein or whens other correlation circumstances is difficult to see To blood back, the needle tubing tip for originally having been enter into vein tube chamber continues to promote and leads to puncture failure through wall of vein.

3. the skin of the neighbouring point of puncture after just sterilizing inevitably is touched because of the index finger below needle tubing seat, when Easily pollution point of puncture leads to pipeline related blood stream infections (CRBSI) when having microorganism on index finger.

4. because the index finger below needle tubing seat can influence the selection of angle between needle angle i.e. needle tubing and skin, reduces and puncture Success rate.

5. the method stability of two fingerhold needle handles is poor, it is difficult to meet the individual demand of nurse operation.

Invention content

The present invention to solve the above-mentioned problems, provides a kind of safe type venous retaining needle.

The object of the present invention is achieved like this：

A kind of safe type venous retaining needle, including：The needle tubing of one rigidity for puncturing skin and wall of vein, one will Needle tubing bottom part fixes the needle tubing seat in it；One casing flexible, a casing seat being tightly connected with casing shoe, set Tube socket have one it is hollow it is collateral be connected with infusion tube, an elastomeric isolation plug being located in the casing seat extension of tubular will cover Tube socket inner cavity is divided into ante-chamber and back cavity；The front end face of batching pig forms the bottom of ante-chamber, and the rear end face of batching pig forms back cavity Top, ante-chamber are transfusing chamber, ante-chamber of the liquid through collateral sleeve pipe seat inner cavity of infusion tube inner cavity flowing when normal use Enter vein inner cavity from cannula tip opening through cannula cavity again；The fore-end of needle tubing is located at cannula cavity across batching pig； The fore-end of the needle tubing refers to the needle tubing in the ante-chamber of cannula cavity and casing seat inner cavity；Needle tubing seat and casing seat that This socket, it is described to be socketed each other, refer to the socket between the casing seat extension of tubular and the needle tubing seat main body of tubular, Ke Yishi Casing seat extension is inserted in needle tubing seat inner cavity, can also be that needle tubing cover for seat enters casing seat extension, the part of socket can be each other What is be oriented to axially slides relative, and the axial axis refers to the central axis of needle tubing and casing；It is set between needle tubing seat and casing seat There is at least one elasticity part including compressed spring may be selected that can be deformed upon by external force；Further include it is at least one can The needle tubing seat handle being linked together with needle tubing seat, sets that there are one can touch casing in the case where external force drives on needle tubing seat handle The contact component of seat；The contact component can be the region that can touch casing seat on needle tubing seat handle；Also may be used To be the movable part that can be deformed upon by external force extended from needle tubing seat handle, such as one comes from needle tubing Sheet on seat handle extends, at least one position is contacted with a part of region of casing seat on contact component.

When using the present invention, operator's proficiency fixed pin tube socket acts on casing seat and drives it towards close to needle tubing on the other hand The direction axial movement of seat, the axial axis refers to the central axis of needle tubing and casing, and forces elastic part between the two Part deforms upon storage elastic potential energy, and needle tubing tip is exposed from its cannula tip is coated；Operator's finger is by needle tubing seat handle Contact component positioned at casing seat region presses to casing seat, such as presses to its surface or be pressed into its internal groove component, makes two Person's relative position is fixed, and elasticity part cannot restore.It is attached that the finger of operator's face contact component presses needle tubing seat handle simultaneously Close infusion tube makes its indentation formation.Near described, it can be suspended from needle tubing seat handle side, can straddle needle tubing Seat handle upper end, can also be to be passed across or through from needle tubing seat handle surfaces.

Start venipuncture procedure immediately, though when having not seen that blood back operator judges needle tubing tip in venipuncture procedure Duct of Arantius intracavitary may be had been enter into, such as operator has experienced the breakthrough sense for piercing through side vein tube wall and venous blood pressure When inadequate, whether enter vein tube chamber for the pin hole at accurate judgement needle tubing tip, operator only needs gently to reduce finger to needle The pressing dynamics of tube socket handle, at this time because (infusion tube usually selects the elasticity such as TPE, TPU, PVC to the elasticity of infusion tube itself Material makes), the form of the infusion tube of pressurized zone is from indentation status sections or whole recoveries to the infusion of reset condition Blood is actively attracted to syringe intracavity by the negative pressure suction force that hose, either part recovery still restore its generation completely, and The blood back peep hole of segmental defect on needle tubing is flowed through, blood back is observed through transparent or semitransparent casing by human eye in time； This blood back mode is clearly active blood back, and extremely sensitive, as long as pin hole part enters vein tube chamber and can observe To blood back, so be " active sensitive blood-return ".

After needle tubing tip enters vein inner cavity, casing seat can be made to the pressing force of needle tubing seat handle by reducing or release finger It is forced to the direction far from needle tubing seat because of the elastic recovering force that the release of the elastic potential energy of elasticity part generates to move, and is finally made Soft cannula tip has coated sharp needle tubing tip, i.e., sharp needle tubing tip is not open interior expose from cannula tip；Bullet Elastic recovering force after power component deformation is more than the elastomeric isolation plug of casing seat inner cavity to passing through the resistance of the needle tubing part in it, This resistance refers to being formed in the process due to elastomeric isolation plug is to passing through oppressive force existing for the needle tubing part in it detaching Frictional resistance between batching pig and needle tubing outer surface.

In order to preferably manipulate, needle tubing seat main body is cylindrical in shape, by the smaller same tubular casing seat extension of outer diameter It is arranged in it, needle tubing seat handle is connected in needle tubing seat main body；Specially vertical-type needle tubing seat handle, including two from needle tubing seat master Body upper surface stretch out in it is foliated convenient for finger hold part be vertical component effect, it is described to refer to vertically, retention needle tube in Be placed in parallel on horizontal plane, the inclined-plane at needle tubing tip upward when, needle tubing seat handle convenient for finger hold part opened in puncture It is vertical component effect and horizontal plane or near normal with horizontal plane or near normal under the use state of beginning, such The retention needle tube seat handle of current Clinical practice is then parallel with horizontal plane under part；Wherein at least one vertical-type needle tubing seat handle It is that there are two mobilizable axial linears of radial gap to connect for band with needle tubing seat main body, the arc between two radial gaps The needle tubing portions of shape are divided into the curved portion of vertical-type needle tubing seat handle, and curved portion is in needle tubing seat main body upper surface and vertical component effect phase Even；There are one being set on the inside of vertical-type needle tubing seat handle curved portion the lower contact that can touch casing seat extension is driven in external force Component specifically may include the local crowning on the inside of a curved portion.Two finger two vertical-type needle tubings of opposite pressing when use Seat handle, curved portion is connected as axial rotary casing seat extension with linear and rotates close or direct compressive deformation, until arc Local crowning on the inside of shape portion contacts and oppresses casing seat extension surface, makes the two that cannot move to axial.

It is further to increase controllability, further include the foliaceous being connected with the vertical component effect front end of vertical-type needle tubing seat handle Lateral extension portion.Lateral extension portion is contacted with finger can enable finger prevent to discharge production when the elastic potential energy because of elasticity part Needle tubing seat rearward moves caused by raw elastic recovering force, and " rear " refer to moving opposite side with casing seat To.

Further, further include the foliated lateral extension portion being connected with the vertical component effect front end of vertical-type needle tubing seat handle And the backward bending part being connected with lateral extension portion.The setting of backward bending part is so that two finger tips of operator are pressed from both sides respectively Corresponding needle tubing seat handle vertical component effect and after between bending part, the handle arrangement of this finger-clipped not only makes manipulation stablize Property further promoted, and finger can by after promotion to bending part active releasing needle tubing seat handle contact component to set The restraining force of tube socket extension, to faster discharge the elastic potential energy of elasticity part；The restraining force refers to needle tubing seat hand The ability that the contact component of handle both prevents to move to axial by the modes such as oppressing, being embedded in.

It is preferred that further including the foliated lateral extension portion being connected with the vertical component effect front end of vertical-type needle tubing seat handle And the backward bending part being connected with lateral extension portion, also horizontal extension；Horizontal extension and vertical component effect, lateral extension portion, The upper limb connection of backward bending part.The setting of horizontal extension is so that two finger tips of operator are respectively fitted over or wrap up The vertical component effect of corresponding needle tubing seat handle, lateral extension portion, after be collectively formed to bending part, horizontal extension and curved portion In the space for covering cryptomere, the handle arrangement of this finger cot type finger can not only actively driven after to bending part lateral movement and Restraining force of the contact component to casing seat extension of needle tubing seat handle is released, and makes manipulation is more stable to reach finger-hand Handle fusion is the ideal effect of " referring to-needle unification ".

A kind of design that ergonomic is conformal is that needle tubing seat bottom part is equipped with suitable with finger especially middle finger lateral profile The finger support of shape, it can be that individual components are socketed in needle tubing seat bottom part to refer to support, can also be needle tubing seat bottom part and hand Refer to the conformal part of lateral profile, the conformal part refer to convenient for the section c-type that offsets on the outside of finger to upper right side Slightly inclined sheet extension.

A kind of design is that the rear end of the vertical component effect of two vertical-type needle tubing seat handles is linked together.

Another kind design is that the upper end of the vertical component effect of two vertical-type needle tubing seat handles is linked together, and at least side is equipped with The U-shaped gap of open on three sides, the free arm of vertical component effect to form a strip of sheet；Free arm can be with free arm and vertical component effect Linear coupling part rotated inward for axis, the inside of the arm free-end of dissociating is equipped with contact component, specially strip and block Inlay protrusion.

For the movement of preferably nonseptate confinement sleeve seat, the contact component of vertical-type needle tubing seat handle is specially arc The convex ribs of at least one linear are equipped on the inside of shape portion；It is set on the casing seat extension surface of the convex ribs opposite position of linear There is at least one arc shaped recess that can be fitted into therewith.

It is a kind of reliable and easily the design of the movement of confinement sleeve seat be the contact component tool of vertical-type needle tubing seat handle Body is the inlay protrusion of the strip and block on the inside of curved portion；In the casing seat extension table of the inlay protrusion opposite position of strip and block Face is equipped at least one limiting slot including through slot, and inlay protrusion can be embedded in limiting slot.When what is be connected with needle tubing seat When inlay protrusion is embedded in the limiting slot on casing seat, the axially opposite movement of needle tubing seat and casing seat, this hour hand are limited The tip of pipe is exposed from cannula tip opening, punctures the pressing force that finger is reduced or released after seeing blood back to needle tubing seat handle Curved portion is set to reset, inlay protrusion is removed out of limiting slot on casing seat, and the elastic potential energy release of elasticity part pushes casing Seat is moved to the direction far from needle tubing seat, and soft cannula tip is finally made to have coated sharp needle tubing tip.

A kind of design is that needle tubing seat main body is cylindrical in shape, and the smaller same tubular casing seat extension of outer diameter is arranged In it, needle tubing seat handle is connected in needle tubing seat main body；A specially vertical-type needle tubing seat handle, including one from needle tubing seat master The stretching of body upper surface is vertical component effect in the foliated part held convenient for finger, the connected strip of sheet in vertical component effect side Vertical component effect dissociates arm, and free arm can be rotated inward using the linear coupling part of dissociate arm and vertical component effect as axis, and the arm that dissociates is free The inside at end is equipped with contact component, specifically may include the inlay protrusion of a strip and block；Needle tubing seat main body and free arm free-end Corresponding needle tubing seat lateral parts are equipped with the windowed regions of a perforation, casing seat extension table corresponding with the windowed regions of perforation Face is equipped at least one limiting slot including through slot, and the inlay protrusion of strip and block can be embedded in limiting slot.

Further, vertical-type needle tubing seat handle has a lateral extension portion, lateral extension portion upper end be connected with it is foliated before To bending part, forward direction bending part is equipped with an opening for accommodating infusion tube.

Further walk, vertical-type needle tubing seat handle has a lateral extension portion, lateral extension portion upper end be connected with it is foliated before To bending part, forward direction bending part set there are one part accommodate infusion tube opening；Vertical component effect upper end has one to be convenient for infusion tube The recessed area longitudinally ridden.

A kind of design adapting to existing clinical nurse " level holds needle " operating habit is that needle tubing seat main body is cylindrical in shape, will be outer The smaller same tubular casing seat extension of diameter is arranged in it, and needle tubing seat handle is connected in needle tubing seat main body；Specially water Flat pattern needle tubing seat handle includes being stretched out from needle tubing seat body side in the foliated horizontal part held convenient for finger, described Level refers to that retention needle tube is placed in parallel on horizontal plane, the inclined-plane at needle tubing tip upward when, needle tubing seat handle be convenient for hand Refer to hold part is parallel with horizontal plane or less parallel, be that horizontal part is parallel with horizontal plane or less parallel, and face at present The remaining needle conformation that bed uses is similar；The free arm of horizontal part of the connected bowed strip of sheet in horizontal part upper surface, dissociate arm It can be rotated inward as axis using the linear coupling part of dissociate arm and horizontal part, the inside for the arm free-end that dissociates is equipped with contact site Part specifically may include the inlay protrusion of a strip and block；Needle tubing seat main body part corresponding with free arm free-end is equipped with consistent Logical windowed regions, casing seat extension surface corresponding with the windowed regions of perforation are equipped at least one including through slot Limiting slot, the inlay protrusion of strip and block can be embedded in limiting slot.Two fingers hold fixed horizontal type needle tubing on the other hand when use The part of seat handle not contact ionization arm, the other hand axially pull down casing seat main body, elasticity part compressive deformation, needle tubing tip Expose from the cannula tip of retrogressing, the connected free arm in the horizontal type needle tubing seat handle upper surface of finger pressing immediately, dissociate arm with Linear coupling part inwardly namely to the rotation of needle tubing central axial direction or directly compressive deformation makes free arm free-end for axis Inlay protrusion insertion casing seat extension limiting slot in, both needle tubing seat and casing seat cannot axial direction relative movement；It wears Thorn reduces or release finger after seeing blood back make free arm reset the pressing force of needle tubing seat handle, and inlay protrusion is from casing seat Limiting slot in remove, the release of the elastic potential energy of elasticity part pushes casing seat to be moved to the direction far from needle tubing seat, and final Soft cannula tip is set to have coated sharp needle tubing tip.

Further, what casing seat was connected with infusion tube is collateral positioned at horizontal type needle tubing seat handle homonymy, horizontal type needle Being connected in foliated horizontal part front end for tube socket handle foliated upwardly extends portion.

Another step, casing seat is connected collateral positioned at horizontal type needle tubing seat handle homonymy, horizontal type needle with infusion tube Tube socket handle in foliated horizontal part front end be connected with it is foliated upwardly extend portion, the portion upper end of upwardly extending is connected with level The backward bending part of expansion.

The scheme that another kind promotes manipulation stability is that needle tubing seat main body is cylindrical in shape, and is equally cylindrical in shape outer diameter is smaller Casing seat extension be arranged in it, needle tubing seat handle is connected in needle tubing seat main body；Specially ring-shape needle tubing seat handle, including The curled portion held convenient for finger in crimping blade shape face upward from needle tubing seat main body upper end, extended back, when use On the inside of forefinger contact curled portion, on the outside of thumb contact curled portion, curled portion has a free arm of curled portion extended forward, dissociates End is equipped with contact component, specifically may include the inlay protrusion of a strip and block；Needle tubing seat main body is corresponding with free arm free-end Upper surface part is equipped with the windowed regions of a perforation, and casing seat extension surface corresponding with the windowed regions of perforation, which is equipped with, includes The inlay protrusion of limiting slot including through slot, strip and block can be embedded in limiting slot.

Further, the dissociate free-end of arm of curled portion is equipped with contact component, specifically may include inlaying for strip and block Protrusion；There are one interception and the branch of accessible casing seat main body upper end, casing seat corresponding with branch upper ends for free arm Part is equipped with the windowed regions of a closed perforation of envelope sheet elastomers, and elastomer medial surface is infused towards casing seat ante-chamber Chamber, free arm branches end can contact and oppress elastic outside, elastomer is made slightly to be convex in casing seat ante-chamber, can be by casing A drop or few drops is discharged from pin hole in liquid in seat ante-chamber, has no apparent blood back when being punctured with breakthrough sense, can loosen finger Compressing of the arm branches end to elastomer that dissociate is released, elastomer shape restores the negative pressure suction force generated can be by duct of Arantius intracavitary Blood smoothly easily suck pin hole, keep the observation of blood back more sensitive.

As a kind of thinking of the present invention, needle tubing seat handle is the self needle tubing seat hand that individual components or component are constituted Handle is linked together use with needle tubing seat；The self needle tubing seat handle refers to that it is independent component or component, with needle tubing seat Socket including using buckle structure is bonded as one, and compares and needle tubing seat main body integral type molds machine-shaping, hold Easily using the different material of two kinds of performances, certain special clinical requirements are more easily satisfied, and certain specification batch productions are more easy, Certain set of specifications fill relatively easy.

For the degree of the relative movement of better indicator tube socket and casing seat, needle tubing seat main body is cylindrical in shape, by outer diameter Smaller same tubular casing seat extension is arranged in it, and it includes mark line, mark to be equipped on the surface of casing seat extension The label of instruction distance including note point.

In order to preferably realize active sensitive blood-return, it includes that may be selected to hang that the needle tubing seat handle of above-mentioned all schemes, which is equipped with, The constraint of infusion tube including hook, recessed, opening, shallow slot, guiding part.The constraint, guiding part can be independent Component or component can also be the structure division that needle tubing seat handle itself has constraint guiding infusion tube function.

The beneficial effects of the invention are as follows：

1. see blood back, it is not required to exchange the operation bidirectionals such as finger, keeps finger home position that can make casing active pack The sharp tip of needle tubing is covered, thoroughly eliminating needle tubing tip during continuing inserting needle leads to the risk of puncture failure through vein.

2. the sensitive blood-return mode of active aspiration-type, can instead of insensitive passive blood back mode of vein pressure dependence Whether the pin hole for judging needle tubing tip ramp accurately and timely enters vein tube chamber, avoids puncturing caused by blindness inserting needle and lose It loses.

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

4. the contactless needle of holding of skin completely avoids the influence selected needle angle by the index finger below needle tubing seat, from And further improve puncture success rate.

5. finger-clipped, finger cot type, finger ring type kinds of schemes improve manipulation stability, the personalization of nurse operation is met Demand.

Description of the drawings

The attached drawing for not limiting to the present invention is as follows：

Fig. 1：The puncture procedure schematic diagram of existing clinical vein remaining needle；

Fig. 2A：Break through the schematic diagram of wall of vein in the sharp tip of needle tubing；

Fig. 2 B：The schematic diagram of wall of vein is run through at the sharp tip of needle tubing；

Fig. 2 C：Schematic diagram of the sharp tip of needle tubing close to venous valve；

Fig. 2 D：The inclined-plane and pin hole enlarged diagram at the sharp tip of needle tubing；

Fig. 2 E：It is close to the schematic diagram of wall of vein inner membrance in the inclined-plane at the sharp tip of needle tubing；

Fig. 2 F：Casing is located at the intraluminal schematic diagram of vein；

Fig. 3 A：The dimensional structure diagram of the embodiment of the present invention 1, handle pairing, needle tubing tip are exposed；

Fig. 3 B：The dimensional structure diagram of the embodiment of the present invention 1, handle are opened, needle tubing tip sleeve cladding；

Fig. 3 C：The whole cutting structural schematic diagram of the embodiment of the present invention 1, spring-compressed, needle tubing tip are exposed；

Fig. 3 D：The whole cutting structural schematic diagram of the embodiment of the present invention 1, spring release, needle tubing tip sleeve cladding；

Fig. 3 E：The local cutting dimensional structure diagram of the embodiment of the present invention 1；

Fig. 3 F：The operating process status diagram of the embodiment of the present invention 1, handle pairing, needle tubing tip are exposed；

Fig. 3 G：The operating process status diagram of the embodiment of the present invention 1, handle are opened, needle tubing tip sleeve cladding；

Fig. 3 H：The operating process entirety cut-away illustration of the embodiment of the present invention 1, infusion tube compression deformation；

Fig. 3 I：The operating process entirety cut-away illustration of the embodiment of the present invention 1, infusion tube form are restored；

Fig. 3 J：The operating process status diagram of the embodiment of the present invention 1, casing seat, the separation of needle tubing seat；

Fig. 3 K：A kind of prioritization scheme dimensional structure diagram of the embodiment of the present invention 1；

Fig. 4 A：The dimensional structure diagram of the embodiment of the present invention 2；

Fig. 4 B：The operating process status diagram of the embodiment of the present invention 2；

Fig. 5 A：The dimensional structure diagram of the embodiment of the present invention 3；

Fig. 5 B：The local cutting dimensional decomposition structure diagram of the embodiment of the present invention 3；

Fig. 6 A：The dimensional structure diagram of the embodiment of the present invention 4；

Fig. 6 B：The local cutting dimensional structure diagram of the embodiment of the present invention 4；

Fig. 6 C：The separate handle scheme dimensional decomposition structure diagram of the embodiment of the present invention 4；

Fig. 7：The dimensional structure diagram of the embodiment of the present invention 5；

Fig. 8：The dimensional structure diagram of the embodiment of the present invention 6；

Fig. 9 A：The dimensional structure diagram of the embodiment of the present invention 7；

Fig. 9 B：The operating process status diagram of the embodiment of the present invention 7；

Figure 10 A：The dimensional structure diagram of the embodiment of the present invention 8；

Figure 10 B：The operating process status diagram of the embodiment of the present invention 8；

Figure 11 A：The dimensional structure diagram of the embodiment of the present invention 9；

Figure 11 B：The operating process status diagram of the embodiment of the present invention 9；

Figure 12 A：The dimensional structure diagram of the embodiment of the present invention 10；

Figure 12 B：The operating process status diagram of the embodiment of the present invention 10；

Figure 13 A：The dimensional structure diagram of the embodiment of the present invention 11；

Figure 13 B：The operating process status diagram of the embodiment of the present invention 11；

Figure 13 C：The local cutting structural schematic diagram of the embodiment of the present invention 11；

Figure 13 D：The local cutting structural schematic diagram of the embodiment of the present invention 11, spring-compressed, needle tubing tip are exposed, and infusion is soft Pipe compression deformation；

Figure 13 E：The local cutting structural schematic diagram of the embodiment of the present invention 11, spring-compressed, needle tubing tip are exposed, and infusion is soft Tubular state is restored；

Figure 13 F：The local cutting structural schematic diagram of the embodiment of the present invention 11, spring release, needle tubing tip sleeve cladding；

Figure 14 A：The dimensional structure diagram of the embodiment of the present invention 12；

Figure 14 B：The operating process status diagram of the embodiment of the present invention 12；

Figure 14 C：The local cutting structural schematic diagram of the embodiment of the present invention 12, spring-compressed, needle tubing tip are exposed；

Figure 14 D：The local cutting structural schematic diagram of the embodiment of the present invention 12, spring-compressed, needle tubing tip are exposed, membrane-like Elastomer compression deformation；

Figure 14 E：The local cutting structural schematic diagram of the embodiment of the present invention 12, spring release, needle tubing tip sleeve cladding.

In figure：S. skin surface；S1. subcutaneous tissue；S0. skin degerming region；T. thumb；F. index finger；M. middle finger；V. quiet Arteries and veins；V0. vein tube chamber；V1. side wall of vein；V2. offside wall of vein；Vv. venous valve；W1. the blood back peep hole on needle tubing； W2. the windowed regions of needle tubing seat side；W3. the windowed regions in the middle part of needle tubing seat；W4. the windowed regions of needle tubing seat upper surface；W5. The windowed regions of casing seat upper end；P. the inclined-plane at needle tubing tip；L1. the central axis (reference axis) of needle tubing and casing；L2. needle tubing The vertical projecting line of reference axis on the skin；J1. water stops；J2. indwelling adapter；G1. the radial gap on needle tubing seat；G2. needle " u "-shaped gap on tube socket；E. the elastomer of membrane-like；E1. elastomer medial surface；E2. elastic outside；1. venous indwelling Needle；11. needle tubing；110 syringe intracavities；111. needle tubing tip；112. pin hole；113. needle tubing fore-end；114. needle tubing bottom end Point；115. the needle tubing part in batching pig；12. needle tubing seat；120. needle tubing seat inner cavity；121. needle tubing seat tip portion；122. needle Tube socket upper surface；123. needle tubing seat end portion；124. needle tubing seat side；125. needle tubing seat bottom part；1251. needle tubing seat bottoms End face；1252. needle tubing seat bottom ends refer to support；126. section is the interconnecting piece of arc being longitudinally extended in the middle part of needle tubing seat；13. infusion is soft Pipe；130. infusion tube inner cavity；131. the infusion tube pressed；132. from by the infusion tube of indentation state restoration；14. Casing；140. cannula cavity；141. cannula tip；142. casing shoe；143. internal surface of casing；144. cannula tips are open； 15. casing seat；150. casing seat inner cavity .150a. ante-chambers；150b. back cavity；151. casing seat main bodys；152. casing seat tops； 153. casing seat upper ends；154. casing seat sides；155. casing seats are collateral；156. casing seat extensions；1561. limiting slot； 1562. arc shaped is recessed；1563. casing seat extension bottom faces；1564. label；16. needle tubing seat handle；16a. vertical-type needles Tube socket handle；16a1. left vertical type needle tubing seat handles；16a2. Right vertical type needle tubing seat handles；Mono- vertical-type needle of 16b. Tube socket handle；16c. horizontal type needle tubing seat handle；16d. ring-shape needle tubing seat handles；16e. self needle tubing seat handles；161. Needle tubing seat handle front end；162. needle tubing seat handle rear ends；163. needle tubing seat handles and the linear of main body connect；164. needle tubing seats Handle curved portion；1641. semicircular interconnecting piece；The vertical convex rib of 1642. curved portions；165. needle tubing seat handle vertical component effects； The inner space of 1650. two vertical component effects；1651. hook；1652. vertical component effects dissociate arm；1653. free arms 1652 with it is vertical The linear coupling part in portion；1654. vertical component effect upper end recessed areas；The finger support of 1655. vertical component effect handle rear ends；166. needle tubing seats Handle lateral extension portion；To bending part after 1661.；1662. horizontal extension；To bending part before 1663.；To bending before 1664. Opening in portion；The opening of 1665. lateral extension portion lower ends；The horizontal part of 167. needle tubing seat handles；1671. horizontal part bottom end Upward flanging；1672. are conducive to the shallow slot of fixed infusion tube；1673. horizontal parts dissociate arm；1674. free arms 1673 with The linear coupling part of horizontal part；168. upwardly extend portion；To bending part after 1681.；The curled portion of 169. needle tubing seat handles； 1691. on the inside of curled portion；1692. on the outside of curled portion；1693. curled portions are dissociated arm；The branch of 1694. free arms 1693； The end of 1695. branches；17. the contact component of needle tubing seat handle；Local crowning on the inside of 17a. curved portions；In 17b. curved portions The inlay protrusion of side；Convex ribs on the inside of 17c. curved portions；Inlay protrusion on the inside of 17d. 1652 free-ends of free arm；17e. is swum From the inlay protrusion on the inside of 1673 free-end of arm；The inlay protrusion of 17f. 1693 free-ends of free arm；18. elasticity part； 18a. compressed springs；19. elastomeric isolation plug；191. batching pig front end faces；192. batching pig rear end faces.

Specific implementation mode

Limitation the embodiment of the present invention is not as follows：

Illustrate existing venous detaining needle operating process first, as shown in Figure 1, the pipe of indwelling adapter J2 and medical liquid container Road is connected, and liquid flows into infusion tube 13, and excluding air makes liquid that can be oozed from the pin hole 112 of remaining needle, and closing is clipped in infusion Water on hose 13 stops J1, and after point of puncture skin S0 disinfections nearby, left hand taught skin, hand thumb T is in upper index finger F under Hold needle tubing seat handle 16, needle tubing tip ramp P upward, opaque needle tubing 11 and skin surface S α inserting needles at an angle, angle Degree α is the vertical projecting line L2 of central axis L1 (i.e. reference axis) and 11 central axis L1 of needle tubing in skin surface S of needle tubing 11 Between angle, needle angle α it is correct selection decide to a certain extent puncture whether succeed, however be located at needle tubing seat handle Index finger F between 16 and skin surface S is not only easy this selection of skin S0 but also the severe jamming that pollution has sterilized, especially It is when need to select smaller needle angle, also, needs to turn down needle tubing at any time during inserting needle namely reduce needle angle α to protect Needle tubing tip 111 is demonstrate,proved in the center of vein tube chamber V0, this improper position severe jamming being clipped in the middle of index finger F it is this into The operation that needle angle [alpha] may reduce at any time, reduces puncture success rate；Inserting needle process is as shown in Figure 2 A, and needle tubing tip 111 punctures Skin surface S breaks through nearest side wall of vein V1 by subcutaneous tissue S1, and the part of pin hole 112 is located at vein tube chamber V0 at this time Interior, intravenous pressure forces blood into needle tubing 11 and infusion tube 13, in the transparent or semitransparent main body of casing seat 15 Red or kermesinus blood back can be observed on upper and/or transparent or semitransparent infusion tube 13；It observes after blood back to ensure Pin hole 112 is fully located in vein tube chamber V0, and it is usually several millimeters that need to turn down needle tubing 11 namely reduce needle angle α to continue inserting needle A distance；If vein tube chamber V0 is compared with when thin, vein is bent substantially, needle angle α is bad, operator is unskilled Easily in this procedure failure, there is the sharp tip 111 of needle tubing 11 as shown in Figure 2 B and run through offside wall of vein V2, punctures thorough Failure；For another example when there is situation of the sharp tip 111 of needle tubing 11 shown in Fig. 2 C close to venous valve Vv, when pin hole 112 is attached to Blood back is difficult to occur when on venous valve Vv, has penetrated venous valve Vv though also a kind of situation is the sharp tip 111 of needle tubing and does not wear Saturating vein but blood back will not occur, then the pin hole 112 on the inclined-plane at the sharp tip 111 of needle tubing as shown in Figure 2 E is close in wall of vein Pin hole 112 in needle tubing tip ramp P and inclined-plane is amplified signal by the situation of film, Fig. 2 D, these situations operator would generally Judge that pin hole 112 not yet enters vein tube chamber V0, continues inserting needle until running through vein V, final puncture failure.

Embodiment 1：

As shown in 3 word such as Fig. 3 A, 3B beginning series of figures, the embodiment of the present invention 1 includes：One for puncture skin and The needle tubing 11 of the rigidity of wall of vein, one is fixed needle tubing bottom part 114 the needle tubing seat 12 in it；One casing flexible 14, a casing seat 15 being tightly connected with casing shoe 142, there are one main part 151, casing seat upper ends for casing seat 15 153, casing seat side 154, casing seat top 152 are tightly connected with casing shoe 142, and 151 left side of casing seat main body has in one Empty collateral 155 are connected with infusion tube 13, are the extension of a tubular after collateral 155 in casing seat main body 151 156, as shown in Fig. 3 C, 3D；12 tip portion 121 of needle tubing seat is located at after collateral 155 in casing seat main body 151, needle tubing seat 12 also have upper surface 122, end portion 123, side 124, bottom part 125 and bottom face 1251；One set for being located at tubular Elastomeric isolation plug 19 in tube socket extension 156 divides casing seat inner cavity 150 for ante-chamber 150a and back cavity 150b；Elastic material system At batching pig 19 can be again sealed off after needle tubing 11 detaches, the front end face 191 of batching pig 19 forms the bottom of ante-chamber 150a, The rear end face 192 of batching pig forms the top of back cavity 150b, and ante-chamber 150a is transfusing chamber, infusion tube inner cavity when normal use Ante-chamber 150a of the liquid through collateral 155 sleeve pipe seat inner cavity 150 of 130 flowings is opened through cannula cavity 140 from cannula tip again Mouth 144 enters vein inner cavity V0 (such as Fig. 2 F)；The fore-end 113 of needle tubing 11 is located at cannula cavity 140 across batching pig 19；Institute The fore-end 113 for stating needle tubing 11 refers to the needle tubing in the ante-chamber 150a of cannula cavity 140 and casing seat inner cavity 150；Set Tube top end 141 has coated sharp needle tubing tip 111；Do not reveal out of cannula tip opening 144 at i.e. sharp needle tubing tip 111 Go out.

Between the needle tubing seat 12 being socketed each other and casing seat 15 be equipped at least one by external force can deform upon include can The elasticity part 18 including compressed spring 18a is selected, it is described to be socketed each other, refer to the casing seat extension 156 and tubular of tubular 12 main body of needle tubing seat between socket, can be that casing seat extension 156 is inserted in needle tubing seat inner cavity 120, can also be needle tubing Seat 12 is inserted in casing seat extension 156, and what the part of socket can be oriented to each other axially slides relative, and the axial axis is The central axis L1 of pointer pipe 11 and casing 14.

Elasticity part 18 in the present embodiment is compressed spring 18a, the bottom ends compressed spring 18a and 12 inner cavity 120 of needle tubing seat Bottom end offset, the tops compressed spring 18a and the bottom face 1563 of casing seat extension 156 offset；Certainly as flexible, compression The tops spring 18a can also offset with 19 rear end face 192 of elastomeric isolation plug.

12 main body of needle tubing seat in the present embodiment is cylindrical in shape, by the smaller same tubular casing seat extension of outer diameter 156 are arranged in it, and needle tubing seat handle 16 is connected in 12 main body of needle tubing seat；Specially vertical-type needle tubing seat handle 16a, including two It is vertical component effect 165 in the foliated part held convenient for finger to be stretched out from 12 main body upper surface 122 of needle tubing seat, described vertical Refer to that retention needle tube 11 is placed in parallel on horizontal plane or is placed on it using point of puncture skin surface as horizontal plane, needle tubing The inclined-plane P at tip 111 upward when, needle tubing seat handle 16 convenient for finger hold part puncture start use state under with Horizontal plane or near normal are vertical component effect 165 and horizontal plane or near normal, and current clinic makes under the conditions of such Retention needle tube seat handle is then parallel with horizontal plane；Wherein Right vertical type needle tubing seat handle 16a2 is fixed with needle tubing seat 12 It is linked together, left vertical type needle tubing seat handle 16a1 is that there are two the mobilizable of radial gap G1 for band with 12 main body of needle tubing seat Axial linear connects 163, and 12 part of needle tubing seat of the arc between two radial gap G1 is vertical-type needle tubing seat handle The curved portion 164 of 16a, curved portion 164 are connected in 12 main body upper surface 122 of needle tubing seat with vertical component effect 165, the right side of the present embodiment Vertical-type needle tubing seat handle 16a2 does not set curved portion 164 then；There are one 164 inside of vertical-type needle tubing seat handle 16a1 curved portions is set The lower contact component 17 that can touch casing seat extension 156 is driven in external force, specifically may include 164 inside of curved portion Local crowning 17a, as indicated in figure 3e.

As shown in Fig. 3 A, 3F, in use, the person's of being operated first proficiency fixed pin tube socket 12, acts on the drive of casing seat 15 on the other hand It moves it to move axially towards close to the direction of needle tubing seat 12, the axial axis refers to the central axis of needle tubing 11 and casing 14 L1, and compressed spring 18a between the two is forced to occur compressive deformation storage elastic potential energy, needle tubing tip 111 is from coating its Cannula tip 141 is exposed；It is vertical that the infusion tube 13 that casing seat collateral 155 is postponed is caught in needle tubing seat handle 16a1 simultaneously In the hook 1651 of the opening upwards of 165 lateral surface bottom end of portion, it is made to be suspended on 165 outside of needle tubing seat handle 16a1 vertical component effects Face；Two vertical-type needle tubing seat handles 16a1,16a2 of two opposite pressings of finger make the two pairing immediately, and curved portion 164 is with line Strip connection 163 is approached for the rotation of axial rotary casing seat extension 156 or direct compressive deformation, until 164 inside of curved portion Local crowning 17a contact and oppress 156 surface of casing seat extension, both make relative movement that cannot be axial, operator's For thumb T by the infusion tube 13 for pressing against vertical-type needle tubing seat handle 16a1 and hanging thereon, infusion tube 13 at this time is to be pressurized The infusion tube 131 of 130 inside deformation of tube chamber, namely the infusion tube 131 that is pressed, as shown in figure 3h.

Though when having not seen that blood back but operator judge that needle tubing tip 111 may have been enter into vein tube chamber in venipuncture procedure In V0, for example, operator experienced the breakthrough sense for piercing through side vein tube wall V1 and when inadequate vein V blood pressure, for standard Really judge whether the pin hole 112 at needle tubing tip 111 enters vein tube chamber V0, operator only needs gently to reduce thumb T to vertical-type The pressing dynamics of needle tubing seat handle 16a1, at this time because the elasticity of infusion tube 13 itself (infusion tube usually select TPE, TPU, PVC elastomeric materials make), the form of the infusion tube 131 of pressurized zone is from indentation status sections or whole recoveries to again The infusion tube 132 of original state, as shown in fig. 31, either part recovery still restore the negative pressure suction force that it is generated and incite somebody to action completely Blood is actively attracted to syringe intracavity 110, and flows through the blood back peep hole W1 of segmental defect on needle tubing, and blood back is through transparent or half Transparent casing 14 and observed in time by human eye；This blood back mode is clearly active blood back, and extremely sensitive, only It wants 112 part of pin hole to enter vein tube chamber V0 and blood back just can be observed, so be " active sensitive blood-return ".

The clamping dynamics for further loosening two vertical-type needle tubing seat handles 16a1,16a2 of finger pair after blood back is seen, together When middle finger M resist needle tubing seat bottom face 1251, as shown in Figure 3 G；Because 164 linear of curved portion connects the recuperability of 163 parts And making needle tubing seat handle 16a1 state restorations, the local crowning 17a of 164 inside of curved portion is released to 156 table of casing seat extension The compressing in face, the elastic potential energy release of compressed spring 18a, pushes casing seat axial advancement that cannula tip part 141 is made to coat needle Tip end 111, such as Fig. 3 D.

After needle tubing tip 111 is coated by relatively flexible cannula tip 141, finger clamps two vertical-type needle tubing seat hands again Handle 16a1,16a2 continue inserting needle several millimeters to appropriate level, press 151 the other hand of casing seat main body on the other hand and detach needle tubing seat 12, Both final separation such as Fig. 3 J states, successfully complete puncture, casing 14 only flexible is retained in vein tube chamber V0, elastomeric isolation Plug 19 will accommodate the external fluid isolation of channel self-closed of needle tubing 11 because of natural resiliency recuperability after needle tubing 11 detaches.

In the present invention, the elastic recovering force after 18 deformation of elasticity part including compressed spring 18a is more than casing For the elastomeric isolation plug 19 of seat inner cavity 150 to passing through the resistance of the needle tubing part 115 in it, this resistance refers to because of elastomeric isolation plug Oppressive force existing for 19 pairs of needle tubing parts 115 passed through in it and detaching the batching pig 19 that is formed in the process and 11 appearance of needle tubing Frictional resistance between face.

As a kind of optimization structure of the present embodiment, Fig. 3 K shows go out a kind of finger support 1252, can be specifically needle tubing seat bottoms End part 125 is equipped with the finger support 1252 conformal with finger especially middle finger lateral profile, and it can be individual components set to refer to support 1252 It is connected on needle tubing seat bottom part 125, can also be the part conformal with finger lateral profile of needle tubing seat bottom part 125, institute State conformal part refer to convenient for the section c-type that offsets on the outside of finger to the slightly inclined sheet extension in upper right side；Refer to The purpose of setting of support 1252 is to preferably fight needle tubing seat 12 caused by elastic force when the elastic force of elasticity part 18 discharges Movement rearward, namely the movement of the direction far from needle tubing tip 111；It is that shape round blunt is resisted to middle finger M shown in Fig. 3 F The improvement of the method for needle tubing seat bottom face 1251 keeps operator more light comfortable.

Embodiment 2：

Further include vertical with vertical-type needle tubing seat handle 16a unlike the scheme of embodiment 2 as shown in Fig. 4 A, 4B The connected foliated lateral extension portion 166 in 165 front end 161 of straight portion；Lateral extension portion 166 is contacted with finger can enable finger Prevent the shifting rearward of the needle tubing seat 12 caused by the elastic recovering force generated by the release of the elastic potential energy of elasticity part 18 Dynamic, " rear " is also referred to moves opposite direction with casing seat 15；Specifically two vertical-type needle tubing seat handle 16a1, 16a2 is connected with lateral extension portion 166, and thumb T, index finger F and 166 medial surface of lateral extension portion offset, and lateral extension portion 166 can Effectively prevent the movement of needle tubing seat 12 rearward；Design herein is lower can to substitute the function of referring to support 1252.

Embodiment 3：

Further include vertical with vertical-type needle tubing seat handle 16a unlike the scheme of embodiment 2 as shown in Fig. 5 A, 5B 165 front end 161 of the straight portion foliated lateral extension portion 166 being connected and the backward bending part being connected with lateral extension portion 166 1661.The setting of backward bending part 1661 is so that two finger tips of operator are clipped in hanging down for corresponding needle tubing seat handle respectively Between straight portion 165 and backward bending part 1661, the handle arrangement of this finger-clipped not only make manipulation stability further promoted and And finger can be by prolonging casing seat to the contact component 17 of the releasing needle tubing seat handle 16 of 1661 active of bending part after promotion The restraining force of extending portion 156, to faster discharge the elastic potential energy of elasticity part 18.

Local cutting dimensional decomposition structure diagram in Fig. 5 B shows the opening 1665 of 166 lower end of lateral extension portion, Towards left side opening 1665 to accommodate infusion tube 13 and with the hook 1651 of free-end upward it is jointly that infusion segment is soft Pipe 13 is suspended on left vertical type needle tubing seat handle 16a1 lateral surfaces.

As shown in Figure 5 B, inlay protrusion 17b of 164 medial surface of curved portion equipped with strip and block, and corresponding casing seat Extension 156 is equipped with conformal limiting slot 1561, and limiting slot 1561 can be that 156 surface of extension is downward laterally or longitudinally Recess, can also be perforation to casing seat back cavity 150b through slot, the corresponding position refer to work as compressed spring 18a When being compressed and needle tubing tip 111 being made to expose preparation puncture from cannula tip 141, raised 17b can be pressed into limiting slot 1561.

As shown in Figure 5 B, it is equipped with the instruction distance including mark line, mark point on the surface of casing seat extension 156 Label 1564, label 1564 can be that the lines of printing can also be local lateral convex ribs or groove, can be one Can also be multiple；When be arranged one label when, in operation the appearance of label 1564 can prompt cannula tip 141 by syringe tip 111 cladding of end；When multiple labels are arranged, in operation the appearance of different location label 1564 can prompt cannula tip be open 144 With the specific distance at needle tubing tip 111, can instruct whether needle tubing 11 can be detached.

Embodiment 4：

As shown in Fig. 6 A, 6B, 6C, unlike the scheme of embodiment 3, include not only and vertical-type needle tubing seat handle The foliated lateral extension portion 166 and be connected with lateral extension portion 166 backward that 165 front end 161 of vertical component effect of 16a is connected Bending part 1661, also horizontal extension 1662；With vertical component effect 165, the upper limb of lateral extension portion 166, backward bending part 1661 Connection, the present embodiment left and right sides are equipped with horizontal extension 1662.

It is corresponding that the setting of horizontal extension 1662 so that two finger tips of operator are respectively fitted over or are wrapped in Vertical component effect 165, lateral extension portion 166, backward bending part 1661, horizontal extension 1662 and the curved portion 164 of needle tubing seat handle In the space for the set cryptomere being collectively formed, such as Fig. 6 A, after the handle arrangement of this finger cot type can not only be such that finger actively drives Restraining force of the contact component 17 to casing seat extension 156 of needle tubing seat handle 16 is displaced sideways and released to bending part 1661, And make the more stable ideal effect for reaching finger-handle fusion and " referring to-needle unification " of manipulation.

It is different from the raised 17b insertions structure of limiting slot 1561 in embodiment 3, casing seat extension as shown in Figure 6B 156 surfaces are equipped with the arc shaped recess 1562 of a plurality of radial development axial alignment, and 164 inside of curved portion, which is equipped with, can be pressed into camber line Convex ribs 17c in shape recess 1562 finally prevents compressed spring 18a by pressure of the convex ribs 17c to arc shaped recess 1562 Form is restored.

As a kind of accommodation, as shown in Figure 6 C, needle tubing seat handle 16 is the self needle tubing that individual components or component are constituted Seat handle 16e, use is linked together with needle tubing seat 12.The self needle tubing seat handle 16e refer to its be independent component or Component, with needle tubing seat 12 including using including buckle structure socket or be bonded as one, compare and needle tubing seat main body integral type Machine-shaping is molded, is easy using the different material of two kinds of performances, certain special clinical requirements are more easily satisfied, certain specifications batch Amount production is more easy, and certain set of specifications fill relatively easy.

Independent vertical-type needle tubing seat handle 16e shown in Fig. 6 C, by the semicircular interconnecting piece 1641 positioned at bottom The curved portion 164 of two handles is linked together, is caught in needle tubing seat 12 by the vertical convex rib 1642 of 164 medial surface of curved portion The section of portion windowed regions W3 is finally to be linked together with needle tubing seat 12 in the interconnecting piece 126 of camber being longitudinally extended.

Embodiment 5：

As shown in fig. 7, maximum with the scheme of above example be not both, two vertical-type needle tubing seat handle 16a1, The rear end 162 of the vertical component effect 165 of 16a2 is linked together, and utmostly reduces two vertical-type needle tubing seat handles 16a1,16a2 Interference of the relative movement to operation, keep manipulation more stable.

Embodiment 6：

As shown in figure 8, maximum with the scheme of above example be not both, two vertical-type needle tubing seat handle 16a1, The upper end of the vertical component effect 165 of 16a2 is linked together, 1650 containment sheath seat extension 156 of inner space, needle tubing seat 12 at least one Side is equipped with the U-shaped gap G2 of open on three sides, the arm 1652 so that vertical component effect for forming a strip of sheet dissociates；Free arm 1652 can be with It is rotated inward for axis with free arm 1652 and the linear coupling part 1653 of vertical component effect 165, the inside for 1652 free-end of arm that dissociates Equipped with contact component 17, the inlay protrusion 17d of specially one strip and block；On the casing seat extension 156 being socketed in it Opposite position is equipped with 1561 (not shown) of at least one limiting slot.

Embodiment 7：

As shown in Fig. 9 A, 9B, 12 main body of needle tubing seat is cylindrical in shape, by the smaller same tubular casing seat extension of outer diameter 156 are arranged in it, and needle tubing seat handle 16 is connected in 12 main body of needle tubing seat；This scheme is maximum not to be both, and needle tubing seat handle 16 has Body be a vertical-type needle tubing seat handle 16b, including one from 12 main body upper surface 122 of needle tubing seat stretch out in it is foliated just It is vertical component effect 165 in the part that finger is held, 165 side of vertical component effect (being as shown in the figure left side) is connected the vertical of strip of sheet Dissociate arm 1652 in portion, and the arm 1652 that dissociates can be that axis is inside with the linear coupling part 1653 of dissociate arm 1652 and vertical component effect 165 The inside of rotation, 1652 free-end of arm that dissociates is equipped with contact component 17, the inlay protrusion 17d of specially one strip and block；Needle tubing Corresponding with 1652 free-end of free arm 124 part of needle tubing seat side of 12 main bodys of seat is equipped with a windowed regions W2 penetrated through, and passes through Corresponding 156 surfaces of casing seat extension logical windowed regions W2 are equipped at least one limiting slot including through slot 1561, the inlay protrusion 17d of strip and block can be embedded in limiting slot 1561.

The vertical-type needle tubing seat handle 16b being individually arranged has one to both sides lateral extension portion 166 outstanding, lateral extension portion 166 upper ends are connected with foliated forward direction bending part 1663, and forward direction bending part 1663 is equipped with an opening for accommodating infusion tube 13 1664。

In use, such as Fig. 9 B, the left sides thumb T clamping needle tubing seat handle 16b, the right sides index finger F clamping needle tubing seat handle 16b Face makes the limiting slot on the inlay protrusion 17d insertion casing seats extension 156 of the strip and block of vertical component effect 1652 free-end of free arm In 1561, at the same press it is longitudinal straddle the upper ends needle tubing seat handle 16b infusion tube 13, at this time pinpoint inclined plane P upward, casing seat Collateral 155 also upward i.e. perpendicular to horizontal plane, in the same direction with the vertical component effect 165 of vertical-type needle tubing seat handle 16b.

In order to increase the stability of manipulation, 165 rear end 162 of vertical component effect of vertical-type needle tubing seat handle 16b is equipped with to refer to and hold in the palm 1655。

Embodiment 8：

As shown in Figure 10 A, 10B, it is not both to oppress vertical component effect simultaneously for the ease of finger to dissociate arm with embodiment 7 1652 and infusion tube 13, there is a recessed area 1654 longitudinally ridden convenient for infusion tube 13 in 165 upper end of vertical component effect；More just Longitudinal infusion tube 13 straddled on needle tubing seat handle 16b recessed areas 1654 is pressed simultaneously in finger；Needle tubing seat handle 16b 165 rear end 162 of vertical component effect be equipped with refer to support 1655, refer to 1655 upper end of support be equipped be conducive to accommodate infusion tube 13 opening.

Embodiment 9：

As shown in Figure 11 A, 11B, maximum with previous embodiment is not both that needle tubing seat handle is connected in 12 main body of needle tubing seat 16；Specially horizontal type needle tubing seat handle 16c, include stretched out from 12 body side 124 of needle tubing seat in it is foliated be convenient for hand Refer to the horizontal part 167 held, the level refers to that retention needle tube 11 is placed in parallel on horizontal plane, needle tubing tip 111 Inclined-plane P upward when, needle tubing seat handle 16 convenient for finger hold part is parallel with horizontal plane or less parallel, be horizontal part 167 or less parallels parallel with horizontal plane, it is similar to " level holds needle " the type remaining needle conformation that current clinical nurse is often used； The free arm 1673 of horizontal part of the connected bowed strip of sheet in 167 upper surface of horizontal part, the arm 1673 that dissociates can be with the arm that dissociates 1673 rotate inward with the linear coupling part 1674 of horizontal part 167 for axis, and the inside for 1673 free-end of arm that dissociates is equipped with contact Component 17 specifically may include the inlay protrusion 17e of a strip and block；12 main body of needle tubing seat is corresponding with 1673 free-end of free arm Part be equipped with one perforation windowed regions W2,156 surface of casing seat extension corresponding with the windowed regions W2 of perforation is equipped with The inlay protrusion 17e of limiting slot 1561 including through slot, strip and block can be embedded in limiting slot 1561.

As shown in Figure 11 B, two fingers hold fixed horizontal type needle tubing seat handle 16c not contact ionization arms on the other hand when use 1673 part, the other hand axially pull down casing seat 15 main body, 18 compressive deformation of elasticity part, and needle tubing tip 111 is from retrogressing Cannula tip opening 144 expose, the connected free arm 1673 in the horizontal type needle tubing seat handle 16c upper surfaces of finger pressing immediately, Free arm 1673 is that axis rotates or directly by buckling inwardly namely to the directions needle tubing central axis L1 with linear coupling part 1674 Shape and make in the limiting slot 1561 of inlay protrusion 17e insertion casing seats extension 156 of free 1673 free-end of arm, needle tubing seat 12 With both casing seats 15 cannot be axial relative movement.

Puncture reduces or release finger after seeing blood back make free arm 1673 reset the pressing force of needle tubing seat handle 16c, Inlay protrusion 17e is removed out of limiting slot 1561 on casing seat 15, and the elastic potential energy release of elasticity part 18 pushes casing seat 15 move to the direction far from needle tubing seat 12, and soft cannula tip 141 is finally made to have coated sharp needle tubing tip 111.

In order to fight movement rearward of the elastic force release hour hands tube socket 12 of elasticity part 18 caused by elastic force namely remote Direction movement from needle tubing tip 111, horizontal type needle tubing seat handle 16c's is connected with blade in 167 front end of foliated horizontal part Shape upwardly extends portion 168, and it can be mainly that thumb T-phase supports and prevents needle tubing seat 12 with finger to upwardly extend 168 medial surface of portion Movement rearward.

Casing seat 15 can rotate to collateral 155 to be connected with infusion tube 13 and be located at horizontal type needle tubing seat handle 16c homonymies, Infusion tube 13 is passed through from the lower surfaces needle tubing seat handle 16c, by above-mentioned steps using when infusion tube 13 could be sandwiched in index finger F (not Display) between the lower surfaces needle tubing seat handle 16c, infusion tube 13 restores after being pressed can be realized active sensitive blood-return.

Embodiment 10：

Maximum with embodiment 9 not to be both as shown in Figure 12 A, 12B, horizontal type needle tubing seat handle 16c's is in foliated 167 front end of horizontal part be connected with it is foliated upwardly extend portion 168, upwardly extend 168 upper end of portion and be connected with the backward of horizontal development Bending part 1681 refers to folder knot to make the horizontal part 167 of horizontal type needle tubing seat handle 16c constitute one with backward bending part 1681 Structure improves the stability of manipulation.

Infusion tube 13 passes through from 167 upper surface of horizontal type needle tubing seat handle 16c horizontal parts, and 167 bottom end of horizontal part is equipped with The upward flanging 1671 of upward opening, 167 upper surface of handle 16c horizontal parts, which is equipped with, is conducive to the shallow of finger fixation infusion tube 13 Slot 1672.

Embodiment 11：

If Figure 13 A, 13B etc. 13 start series of figures shown in, 12 main body of needle tubing seat is cylindrical in shape, by outer diameter it is smaller be equally in The casing seat extension 156 of tubular is arranged in it, and needle tubing seat handle 16 is connected in 12 main body of needle tubing seat；Specially ring-shape needle tubing Seat handle 16d, include from 12 main body upper surface 122 of needle tubing seat upwards, extend back be convenient for finger in crimping blade shape The curled portion 169 of holding；Such as Figure 13 B, 169 inside 1691 of index finger F contacts curled portion, thumb T contact curled portion 169 when use Outside 1692, curled portion 169 have a curled portion 169 extended forward to dissociate arm 1693, and free-end is equipped with contact component 17, The specific inlay protrusion 17f that may include a strip and block；12 main body of needle tubing seat upper surface corresponding with 1693 free-end of free arm 122 parts are equipped with the windowed regions W4 of a perforation, and 156 surface of casing seat extension corresponding with the windowed regions W4 of perforation is equipped with The inlay protrusion 17f of limiting slot 1561 including through slot, strip and block can be embedded in limiting slot 1561.

Such as Figure 13 C, when compressed spring 18a is by compressive deformation and inlay protrusion 17f insertion limiting slots 1561, needle tubing tip 111 expose, while longitudinal 169 outside 1692 of curled portion for straddling ring-shape needle tubing seat handle 16d of infusion tube 13, at this time Upward, casing seat collateral 155 is also upward by pinpoint inclined plane P.

If Figure 13 D, thumb T press infusion tube 131, inlay protrusion 17f is still embedded in limiting slot 1561, compressed spring 18a is by compressive deformation.

The pressure for pressing infusion tube 131 is allowed to restore or is partly restored to infusion tube as Figure 13 E, thumb T reduce 132 state generates the blood in vacuum suction vein tube chamber V0, and 17 f of inlay protrusion is still embedded in limiting slot at this time In 1561, compressed spring 18a is by compressive deformation.

After seeing blood back, as Figure 13 F, thumb T further decrease 169 outside 1692 of curled portion to needle tubing seat handle 16d Pressure, the arm 1693 that dissociates drives 17 f of inlay protrusion abjection, compressed spring out of limiting slot 1561 because natural resiliency restores 18a discharges, and casing seat 15 is pushed to move forward, 111 sleeve top 141 of needle tubing tip cladding.

Embodiment 12：

It is maximum with embodiment 11 not to be both if Figure 14 A, 14B etc. 14 starts shown in series of figures, from 12 main body of needle tubing seat The curled portion 169 held convenient for finger in crimping blade shape that upper surface 122 is upward, extends back, the volume to extend back Pars convoluta 169 continues to extend downwardly to be merged with needle tubing seat upper surface 122, forms the ring-shape needle tubing seat handle 16d of closed loop；Curled portion The free-end of 169 free arms 1693 is equipped with contact component 17, specifically may include the inlay protrusion 17f of a strip and block；Free arm The branch 1694 of interception and 15 main body upper end 153 of accessible casing seat there are one 1693, casing corresponding with branch 1694 Seat 153 part of upper end is equipped with the windowed regions W5 of the closed perforations of envelope sheet elastomers E, elastomer E medial surfaces E1 connections Casing seat ante-chamber 150a, that is, transfusing chamber, 1694 end 1695 of free 1693 branch of arm is accessible and oppresses elastomer E lateral surface E2, So that elastomer E is slightly convex in casing seat ante-chamber 150a, the liquid in casing seat ante-chamber 150a can be dripped from the discharge of pin hole 112 one Or few drops, it has no apparent blood back when being punctured with breakthrough sense, finger can be loosened and release 1693 branch of arm, 1694 end of dissociating The compressing of 1695 couples of elastomer E, elastomer E shape restores the negative pressure suction force generated can be smooth by the blood in vein tube chamber V0 Pin hole 112 is easily sucked, keeps blood back more sensitive.

It can be as follows using process：

The first step：Such as Figure 14 C, compressed spring 18a compressive deformations, shallower embedding of 17 f of inlay protrusion that dissociates on arm 1693 Enter in limiting slot 1561, needle tubing tip 111 is exposed, and the membrane-like elastomer E in 153 windowed regions W5 of casing seat upper end is not swum It is oppressed from 1693 branch of arm, 1694 end 1695.

Second step：Such as Figure 14 D, compressed spring 18a compressive deformations, 17 f of inlay protrusion to dissociate on arm 1693 is deeper embedding Enter in limiting slot 1561, needle tubing tip 111 is exposed, and the membrane-like elastomer E in 153 windowed regions W5 of casing seat upper end is by free The compressing of 1693 branch of arm 1694 end 1695 and towards deforming in casing seat ante-chamber 150a, by the liquid in casing seat ante-chamber 150a A drop or few drops is discharged from pin hole 112.

Third walks：Puncture procedure, such as Figure 14 C, compressed spring 18a compressive deformations, the inlay protrusion 17 dissociated on arm 1693 In insertion limiting slot 1561 shallower f, needle tubing tip 111 is exposed, and reduces thumb T to 169 1692 pressing forces of outside of curled portion Degree releases 1693 branch of arm, 1694 end 1695 of dissociating to the membrane-like elastomer E in 153 windowed regions W5 of casing seat upper end Compressing, membrane-like elastomer E restores, and negative pressure suction force generates active sensitive blood-return.

4th step：Such as Figure 14 E, thumb T is further decreased to 169 1692 pressing dynamics of outside of curled portion, dissociate arm 1693 On 17 f of inlay protrusion abjections out of limiting slot 1561, compressed spring 18a releases push casing seat 15 to move forward, needle tubing tip 111 sleeve tops 141 coat.

The ring-shape needle tubing seat handle 16d curled portions 169 of the present embodiment have left side, two, right side opening, can as accommodation A side opening is closed as the finger cot type handle of similar embodiment 4, further promotes the stability of operation.

Various types of infusion apparatuses can the venous detaining needle 1 of the present invention replace the related puncture needle of infusion apparatus.

Claims (21)

1. a kind of safe type venous retaining needle, including：The needle tubing (11) of one rigidity for puncturing skin and wall of vein, one Needle tubing bottom part (114) is fixed to the needle tubing seat (12) in it；One casing (14) flexible, one and casing shoe (142) casing seat (15) being tightly connected, casing seat (15) have one hollow collateral (155) to be connected with infusion tube (13), and one Casing seat inner cavity (150) are divided into ante-chamber by the elastomeric isolation plug (19) in a casing seat extension (156) positioned at tubular (150a) and back cavity (150b)；The fore-end (113) of needle tubing (11) is located at cannula cavity (140) across batching pig (19)；Its It is characterized in that, at least one packet that can be deformed upon by external force is equipped between the needle tubing seat (12) being socketed each other and casing seat (15) Include the elasticity part (18) including optional compressed spring (18a)；Further include that at least one can be linked together with needle tubing seat (12) Needle tubing seat handle (16), set that there are one can drive the lower casing seat (15) that can touch in external force on needle tubing seat handle (16) Contact component (17)；Elasticity part (18) deformation can make cannula tip (141) coat sharp needle tubing tip (111) after restoring； Elastic recovering force after elasticity part (18) deformation is more than the elastomeric isolation plug (19) positioned at casing seat inner cavity (150) to passing through it The resistance of interior needle tubing part (115).

2. a kind of safe type venous retaining needle according to claim 1, which is characterized in that needle tubing seat (12) main body is in cylinder The smaller same tubular casing seat extension (156) of outer diameter is arranged in it, needle tubing is connected in needle tubing seat (12) main body by shape Seat handle (16)；Specially vertical-type needle tubing seat handle (16a), including two stretched from needle tubing seat (12) main body upper surface (122) It is vertical component effect (165), wherein at least one vertical-type needle tubing seat handle in the foliated part held convenient for finger to go out (16a) is that there are two mobilizable axial linears of radial gap (G1) to connect (163) for band with needle tubing seat (12) main body, two The needle tubing seat (12) of arc between a radial gap (G1) is partly the curved portion (164) of vertical-type needle tubing seat handle (16a), Curved portion (164) is connected in needle tubing seat (12) main body upper surface (122) with vertical component effect (165)；Vertical-type needle tubing seat handle (16a) The lower contact component (17) that can touch casing seat extension (156) is driven in external force there are one being set on the inside of curved portion (164), The specific local crowning (17a) that may include on the inside of a curved portion (164).

3. a kind of safe type venous retaining needle according to claim 2, which is characterized in that further include and vertical-type needle tubing seat The connected foliated lateral extension portion (166) in vertical component effect (165) front end (161) of handle (16a).

4. a kind of safe type venous retaining needle according to claim 2, which is characterized in that further include and vertical-type needle tubing seat Vertical component effect (165) front end (161) of handle (16a) connected foliated lateral extension portion (166) and and lateral extension portion (166) connected backward bending part (1661).

5. a kind of safe type venous retaining needle according to claim 2, which is characterized in that further include and vertical-type needle tubing seat Vertical component effect (165) front end (161) of handle (16a) connected foliated lateral extension portion (166) and and lateral extension portion (166) connected backward bending part (1661), also horizontal extension (1662)；Horizontal extension (1662) and vertical component effect (165), the upper limb connection of lateral extension portion (166), backward bending part (1661).

6. a kind of safe type venous retaining needle according to claim 2, which is characterized in that needle tubing seat bottom part (125) Equipped with the finger support (1252) conformal with finger especially middle finger (M) lateral profile.

7. a kind of safe type venous retaining needle according to claim 2, which is characterized in that two vertical-type needle tubing seat handles The rear end (162) of the vertical component effect (165) of (16a1,16a2) is linked together.

8. a kind of safe type venous retaining needle according to claim 2, which is characterized in that two vertical-type needle tubing seat handles The upper end of the vertical component effect (165) of (16a1,16a2) is linked together, and at least side is equipped with the U-shaped gap (G2) of open on three sides, to Form the free arm (1652) of vertical component effect (165) of a strip of sheet；Free arm (1652) can with free arm (1652) with it is vertical The linear coupling part (1653) in portion (165) rotates inward for axis, and the inside of arm (1652) free-end that dissociates is equipped with contact component (17), it specifically may include the inlay protrusion (17d) of a strip and block.

9. a kind of safe type venous retaining needle according to claim 2, which is characterized in that vertical-type needle tubing seat handle The contact component (17) of (16a) is specially the convex ribs (17c) at least one linear being equipped on the inside of curved portion (164)；Online Casing seat extension (156) surface of convex ribs (17c) opposite position of strip is equipped at least one camber line that can be fitted into therewith Shape is recessed (1562).

10. a kind of safe type venous retaining needle according to claim 2, which is characterized in that vertical-type needle tubing seat handle The contact component (17) of (16a) is specially the inlay protrusion (17b) of the strip and block on the inside of curved portion (164)；In the edge of strip and block Casing seat extension (156) surface of embedding protrusion (17b) opposite position is equipped at least one limit including through slot Slot (1561), inlay protrusion (17b) can be embedded in limiting slot (1561).

11. a kind of safe type venous retaining needle according to claim 1, which is characterized in that needle tubing seat (12) main body is in cylinder The smaller same tubular casing seat extension (156) of outer diameter is arranged in it, needle tubing is connected in needle tubing seat (12) main body by shape Seat handle (16)；A specially vertical-type needle tubing seat handle (16b), including one from needle tubing seat (12) main body upper surface (122) it is vertical component effect (165) in the foliated part held convenient for finger to stretch out, and vertical component effect (165) side is connected one The free arm (1652) of the vertical component effect of strip of sheet, the arm (1652) that dissociates can be with the threadiness of dissociate arm (1652) and vertical component effect (165) Coupling part (1653) rotates inward for axis, and the inside of arm (1652) free-end that dissociates is equipped with contact component (17), can specifically wrap Include the inlay protrusion (17d) of a strip and block；Needle tubing seat (12) main body needle tubing seat side corresponding with free arm (1652) free-end Face (124) is partly equipped with the windowed regions (W2) of a perforation, casing seat extension corresponding with windowed regions (W2) of perforation (156) surface is equipped at least one limiting slot (1561) including through slot, and the inlay protrusion (17d) of strip and block can be embedded in In limiting slot (1561).

12. a kind of safe type venous retaining needle according to claim 11, which is characterized in that vertical-type needle tubing seat handle (16b) has a lateral extension portion (166), lateral extension portion (166) upper end to be connected with foliated forward direction bending part (1663), forward direction Bending part (1663) is equipped with an opening (1664) for accommodating infusion tube (13).

13. a kind of safe type venous retaining needle according to claim 11, which is characterized in that vertical-type needle tubing seat handle (16b) has a lateral extension portion (166), lateral extension portion (166) upper end to be connected with foliated forward direction bending part (1663), forward direction Bending part (1663) set there are one part accommodate infusion tube (13) opening (1664)；Vertical component effect (165) upper end has one to be convenient for The recessed area (1654) that infusion tube (13) longitudinally rides.

14. a kind of safe type venous retaining needle according to claim 1, which is characterized in that needle tubing seat (12) main body is in cylinder The smaller same tubular casing seat extension (156) of outer diameter is arranged in it, needle tubing is connected in needle tubing seat (12) main body by shape Seat handle (16)；Specially horizontal type needle tubing seat handle (16c) includes being in from what needle tubing seat (12) body side (124) stretched out The foliated horizontal part (167) held convenient for finger, the level of the connected bowed strip of sheet in horizontal part (167) upper surface Dissociate arm (1673) in portion, and the arm (1673) that dissociates can be with the linear coupling part of dissociate arm (1673) and horizontal part (167) (1674) it is rotated inward for axis, the inside of arm (1673) free-end that dissociates is equipped with contact component (17), specifically may include an item Block-like inlay protrusion (17e)；Needle tubing seat (12) main body part corresponding with free arm (1673) free-end is equipped with a perforation Windowed regions (W2), casing seat extension (156) surface corresponding with windowed regions (W2) of perforation include equipped at least one The inlay protrusion (17e) of limiting slot (1561) including through slot, strip and block can be embedded in limiting slot (1561).

15. a kind of safe type venous retaining needle according to claim 14, which is characterized in that casing seat (15) and infusion are soft Pipe (13) connected collateral (155) is located at horizontal type needle tubing seat handle (16c) homonymy, and horizontal type needle tubing seat handle (16c) is in Foliated horizontal part (167) front end, which is connected with, foliated upwardly extends portion (168).

16. a kind of safe type venous retaining needle according to claim 14, which is characterized in that casing seat (15) and infusion are soft Pipe (13) connected collateral (155) is located at horizontal type needle tubing seat handle (16c) homonymy, and horizontal type needle tubing seat handle (16b) is in Foliated horizontal part (167) front end be connected with it is foliated upwardly extend portion (168), upwardly extend portion (168) upper end and be connected with The backward bending part (1681) expanded horizontally.

17. a kind of safe type venous retaining needle according to claim 1, which is characterized in that needle tubing seat (12) main body is in cylinder The smaller same tubular casing seat extension (156) of outer diameter is arranged in it, needle tubing is connected in needle tubing seat (12) main body by shape Seat handle (16)；Specially ring-shape needle tubing seat handle (16d), including from needle tubing seat (12) main body upper surface (122) upwards, to The curled portion (169) held convenient for finger in crimping blade shape extended afterwards, curled portion (169) have a volume extended forward Pars convoluta (169) dissociates arm (1693), and free-end is equipped with contact component (17), specifically may include the inlay protrusion of a strip and block (17f)；Needle tubing seat (12) main body upper surface (122) corresponding with free arm (1693) free-end is partly equipped with the windowing of a perforation Region (W4), casing seat extension (156) surface corresponding with windowed regions (W4) of perforation are equipped with including through slot The inlay protrusion (17f) of limiting slot (1561), strip and block can be embedded in limiting slot (1561).

18. a kind of safe type venous retaining needle according to claim 17, which is characterized in that curled portion (169) is dissociated arm (1693) free-end is equipped with contact component (17), specifically may include the inlay protrusion (17f) of a strip and block；Free arm (1693) there are one interception and the branches (1694) of accessible casing seat (15) main body upper end (153), with branch (1694) phase Corresponding casing seat upper end (153) is partly equipped with the windowed regions (W5) of envelope sheet elastomers (E) closed perforation.

19. a kind of safe type venous retaining needle according to claim 1-18, which is characterized in that needle tubing seat handle (16) is The self needle tubing seat handle (16e) that individual components or component are constituted, use is linked together with needle tubing seat (12).

20. a kind of safe type venous retaining needle according to claim 1-19, which is characterized in that needle tubing seat (12) main body is in The smaller same tubular casing seat extension (156) of outer diameter is arranged in it, in casing seat extension (156) by tubular Surface is equipped with the label (1564) of the instruction distance including mark line, mark point.

21. a kind of safe type venous retaining needle according to claim 1-20, which is characterized in that needle tubing seat handle (16) is set There is the pact of the infusion tube (13) including hook (1651), recessed (1654), opening (1664), shallow slot (1672) may be selected Beam, guiding part.