CN209316694U - A kind of hose safety transfusion needle - Google Patents

Abstract

A kind of hose safety transfusion needle, is related to medical device technology, and under transfusion state, inner assembly retreats the rear end for being fixed on casing, so that needle core is detached from preceding hose and is accommodated in casing, without extracting needle core, effectively prevent accidentally stabbing infection.The leading portion of casing is flexible flexible tube section, therefore in use, although the exposed parts of transfusion needle are long, but it can be with curved spout section, exposed parts are capable of fixing to be punctured near transfusion part in human body, it is too long and can not fix to avoid exposed parts, relieve conventional rigid exposed parts it is too long pull caused by unintended risk.Casing includes hard tube section, and after inner assembly retrogressing is fixed, needle core front end is surrounded by hard tube section, and needle core front end can be effectively prevented and pierce through casing.It realizes infusion apparatus adaptation, hose infusion, catheter retaining and solves the multinomial performances such as clinical availability, it is simple for structure, it is easy to operate, it is low in cost, it is suitable for industrialized production and clinical expansion.

Description

A kind of hose safety transfusion needle

Technical field

The invention is related to the field of medical instrument technology, and in particular to a kind of hose safety transfusion needle.

Background technique

Since invention venous transfusion, infusion field and nursing industry there is many pain spots, wherein reflection concentration and one One of the problem of directly being denounced endlessly, injury of the steel needle to blood vessel when being exactly infused, nursing industry are all seeking cost performance always Suitable transfusion needle product is replaced traditional infusion steel needle.In recent years, it due to the hose characteristic of venous detaining needle, punctures into The part of blood vessel is soft conduit, and infusion when is few to injury of blood vessel, and patient can be with needle gentle activity, some developed regions Begin to use venous detaining needle to substitute traditional steel needle to be infused, especially infantile infusion, then it is more universal.Venous detaining needle is suitable For the puncture at the multiple positions of human body, one-time puncture can be continuous or be spaced use in multiple, more days, alleviates patient and punctures repeatedly Pain, alleviate the workload of nursing staff, clinically it is deep suffered from by shield welcome, while saving a large amount of medical treatment and nursing people Power material resources have great medical economics meaning.Certain this remaining needle can also be used as conventional disposable infusion needle and use.

The shortcomings that traditional remaining needle also very much, first, existing remaining needle price；The second, straight type remaining needle with it is defeated Liquid device is unable to pre-assembled, causes nurse to need to reconnect infusion apparatus after puncturing, operation is relatively complicated, and labor intensity substantially increases.Y Though type remaining needle can be with infusion apparatus pre-assembled, structure is complicated, uses and is inconvenient, even if having there is producer's handle to stay now Needle and infusion apparatus pre-assembled are set, since its influence inconvenient for use punctures, nurse still still dismantles exclusive use in practice, prepackage With performing practically no function；All there are one most prominent disadvantages for third, the no matter straight type of existing well-known remaining needle or Y type, just It is the needle core that hard must be pulled out after puncturing, this movement easily causes nursing staff accidentally to be stabbed infection, defeated for executing daily For the nursing staff of liquid, professional risk is big, although also having the safe type retention needle of many Anti-stabbings at present, or structural Cost is more expensive or has deflected away from ergonomics needs, extremely inconvenient for human clinical.Below for ease of description, Remaining needle puncture one end referred to as " front end " to blood vessel, opposite to that one end is known as " rear end ".

To solve the above-mentioned safety problem for accidentally stabbing infection, a kind of remaining needle of existing needle core built-in after puncture, knot Structure generally comprises inner assembly and outer component, and outer component includes outer needle stand, casing and preceding hose, before preceding hose is fixed on outer needle stand End, the front end of casing are connect with the rear end of outer needle stand, so that casing, outer needle stand and preceding hose are sequentially communicated.Interior group Part includes needle core, interior needle stand and inner flexible tube, and needle core is the steel needle of hard, the fixed company in the front end of the rear end of needle core and interior needle stand It connecing, the front end of inner flexible tube is connect with the rear end of interior needle stand, so that inner flexible tube, interior needle stand and needle core are sequentially communicated, it is interior soft Pipe is through in described sleeve pipe.Under original state, interior needle stand is in outer needle stand, needle core be applied in front of in hose and from preceding hose Front end is pierced by.When puncture, medical staff pushes needle core to be pierced into blood vessel together with preceding hose, and after puncturing successfully, medical staff is drawn Dynamic inner flexible tube, allows interior needle stand, inner flexible tube and needle core to retreat to casing, is not completely withdrawn from, inner assembly is locked in set The rear end of pipe connects infusion apparatus in the rear end of inner flexible tube, and soft preceding hose is left to remain in blood vessels, and liquid successively passes through interior soft Pipe-interior needle stand-preceding hose of the outer needle stand-of needle core-casing-is infused.

If Japanese temple ridge is lucky auxiliary in the technical solution of " injection needle assembly with the wing " of Publication No. CN1271609A, It discloses and telescopic storage sheath is set in injection needle rear end, pass through sliding position opposite between injection needle and protective sheath It moves, retreats injection needle axially to infusion position, so that solving steel needle accidentally stabs risk from initial position.Similarly, day Benson Side of body nation controls in " medical needle device of the shield with the wing " technical solution of Publication No. CN1767868A, disclose " central spindle, It is inserted into shield pipe orifice so as to move axially ", and " rear end of central spindle can be connect with perfusion tube and the tip of needle can store up There are in the inner hole of shield pipe " etc. design, and by by needle core from initial position axially recession be displaced to infusion position so that Casing stores needle core to achieve the purpose that prevent accidentally to stab, and essence disclosed by this two parts of technical solutions is close, can be effective It prevents from accidentally stabbing.

Accidentally puncture problem is prevented for remaining needle, there are also Japanese rattan well it is bright to equal Publication No. CN101146568A, CN104334225A, her rattan henry etc. disclose in " indwelling needle device " technical solution of Publication No. CN102933242A The needle core of hard is retreated from the initial position after puncture vessel to the technical solution for the infusion position being accommodated in casing, the type Scheme, which is beneficial in that, solves the problems, such as also solve using preceding hose retention transfusion and the injury that avoids needle core to blood vessel The needle core of hard extracts the safety problem accidentally stabbed.

The above-mentioned research for preventing from accidentally piercing through for remaining needle, primary emphasis are safely to store hard and sharp keen needle Core, since remaining needle is different from the disposable characteristic of common transfusion needle, remaining needle usually requires to be retained in 72 in human vas Hour or more.Above it is found that needle core is concealed in casing under transfusion state, to avoid human body position from changing or day Normal activity causes sharp keen hard needle core puncture casing to cause harm to the human body, and needs to select the casing of hard, but the set of hard Pipe has the following problems: as intravenous infusion needle, especially use infantile infusion when, optimal infusion position be usually scalp, Instep or the back of the hand, after the preceding hose of remaining needle carries out puncture indwelling to these positions, remaining needle exposed parts need fixed people Body is punctured near position.However the venous transfusion of which kind of either above-mentioned position, position are punctured for preceding hose Space and be all limited for the fixed space of the exposed part of remaining needle.And in order to ensure normal infusion, preceding hose and The fixation of its exposed part then require it is opposed flattened and not bent, because of the entire length of hose and the exposed part of remaining needle before this It must control and be fixed in the opposed flattened and not bent region of human body, such as the back of the hand, its exposed part after retained needle puncture Just exposed parts otherwise can not can not be just fixed, clinical availability is lost beyond the joint position between finger and palm, this Point shows especially prominent under infantile infusion scene.

In addition, being shown since remaining needle needs to carry out tube sealing processing to infusion pipeline during indwelling according to clinical experience, seal Closer to blood vessel, regurgitant volume is fewer for the position of pipe, such as straight type containing needle structure.However above scheme hard needle core or hard storage Sheath hinders the optimum position of tube sealing, influences tube sealing effect.

Utility model content

For the prior art there are above-mentioned technical problem, the present invention provide it is a kind of convenient for fixed indwelling, it is anti-error stab and Improve the hose safety transfusion needle of clinical availability.

To achieve the above object, the invention provides following technical scheme.

A kind of hose safety transfusion needle, including inner assembly and outer component are provided, outer component includes outer needle stand, casing, intermediate plate With preceding hose, preceding hose is fixed on the front end of outer needle stand, and the front end of casing is connect with the rear end of outer needle stand, so that set Pipe, outer needle stand and preceding hose are sequentially communicated；

Inner assembly includes the needle core of interior needle stand, inner flexible tube and hard, the fixed company in the front end of the rear end of needle core and interior needle stand It connects, the front end of inner flexible tube is connect with the rear end of interior needle stand, so that inner flexible tube, interior needle stand and needle core are sequentially communicated；

Under original state, inner flexible tube is threaded through in casing, and interior needle stand is in outer needle stand, needle core be applied in front of in hose and It is pierced by from the front end of preceding hose；

Under transfusion state, inner assembly retreats the rear end for being fixed on casing, so that needle core is detached from the preceding hose and appearance It sets in casing, is formed successively by infusion channel as " the interior needle stand of the inner flexible tube-- preceding hose of the outer needle stand-of needle core-casing-"；

It is characterized in that: the flexible tube section that the leading portion of described sleeve pipe keeps clear after being flexible and bending, being located at for casing is soft Position after pipeline section is equipped with hard tube section, and needle core is detached from the flexible tube section and inner assembly retreats after being fixed, and needle core is hard Pipeline section surrounds.

Wherein, the back segment of casing is hard tube section, and hard tube section is sequentially communicated with flexible tube section, and inner assembly retrogressing is fixed it Afterwards, whole needle core is surrounded by hard tube section.

Wherein, after inner assembly retrogressing is fixed, the hard tube section only surrounds the front end of needle core.

Wherein, the back segment of described sleeve pipe itself is hard, to form the hard tube section.

Wherein, the outer peripheral surface of described sleeve pipe is coated with hard sleeve, to form the hard tube section.

Wherein, oriented structure is provided between interior needle stand and outer needle stand, oriented structure can limit interior needle stand rotation.

Wherein, the two sides of the outer component are respectively arranged with fin, and the side of at least fin of side is provided with anti- Protrusion is moved back, after the fin of two sides is equivalent in opposite directions, in the anti-back protrusion diameter is pressed downward described sleeve pipe so that clamp sleeve residence states Needle stand or the rear end for withstanding the interior needle stand, to prevent the interior needle stand from retreating.

It wherein, further include packaging sheath, packaging sheath can be covered in the front of outer needle stand with pulling out, the preceding hose and described Needle core is inserted in the packaging sheath, and the packaging sheath is provided with extension, after the fin of two sides is equivalent in opposite directions, the extension Portion resists the fin, so that the fin is kept folded position, the setting of the extension is jagged, and the fin of two sides is rolled in opposite directions After conjunction, fin by the grip position notch.

Wherein, the outer peripheral surface of the inner assembly is fixed with piston ring, passes through between the inner sidewall and inner assembly of described sleeve pipe The piston ring seals to realize, the longitudinal section of piston ring is in gradually wide Y shape or V shape.

Wherein, the inner assembly is provided with the transition passage without being formed in interior needle stand side-wall hole, and the transition is logical Road is to be provided with the infusion hole being arranged in juxtaposition in interior needle stand and with needle core, and the two-port of infusion hole is respectively communicated with inner flexible tube and set It manages, under transfusion state, forms another infusion channel as " inner flexible tube-preceding hose of the outer needle stand-of infusion hole-casing-".

Wherein, the inner assembly is provided with without the transition passage that is formed in interior needle stand side-wall hole, inner flexible tube it is outer Circumferential surface is provided with the piston ring for sealing anti-leak, the transition passage be provided with inner flexible tube interior needle stand and piston ring it Between tube wall side opening, there are infusion gaps between the outside of interior needle stand and the inner sidewall of casing, are formed under transfusion state " interior soft Another infusion channel as the pipe-side opening-infusion gap-preceding hose of the outer needle stand-of casing-".

Wherein, the flexible tube section of described sleeve pipe is arranged in the intermediate plate, and is located in place of the close outer needle stand of flexible tube section.

The utility model has the beneficial effects that

A kind of hose safety transfusion needle of the utility model, under transfusion state, inner assembly retrogressing is fixed on casing Rear end forms infusion channel and is infused, without extracting needle so that needle core is detached from the preceding hose but still is accommodated in casing Core effectively prevent accidentally stabbing infection.Under the premise of guarantee effectively storage conceals needle core and meets the safety needs of Anti-stabbing, set The leading portion of pipe is flexible and the flexible tube section that keeps clear after being bent, therefore in use, although transfusion needle in outer needle Exposed parts after seat are long, but exposed parts can be made to be capable of fixing and be punctured in human body by curved spout section Near transfusion part, avoid that exposed parts are too long and can not fix, the exposed parts for relieving conventional rigid too long are drawn Unintended risk caused by pulling.Casing includes hard tube section, and after inner assembly retrogressing is fixed, needle core is detached from the flexible tube section, And needle core front end is surrounded by hard tube section, and needle core front end can be effectively prevented and pierce through casing.It also, can be with because being provided with flexible tube section Intermediate plate is set in flexible tube section, the tube sealing position of intermediate plate is arranged in whole infusion pipeline compared with front end, effectively reduces blood back.

Detailed description of the invention

Fig. 1 is one of the embodiment structural schematic diagram of hose safety transfusion needle in the initial state.

Fig. 2 is one of embodiment structural schematic diagram of the hose safety transfusion needle under transfusion state.

It is to characterize casing periphery to be cased with longer hard sleeve to form the schematic diagram of hard tube section that Fig. 3, which is in embodiment,.

It is to characterize casing periphery to be cased with shorter hard sleeve to form the schematic diagram of hard tube section that Fig. 4, which is in embodiment,.

Fig. 5 is a kind of schematic diagram of hose safety transfusion needle in transfusion state bottom hose section bending state of embodiment.

Fig. 6 is the schematic diagram of the first oriented structure in embodiment.

Fig. 7 is the schematic diagram of second of oriented structure in embodiment.

Fig. 8 is the schematic diagram of the third oriented structure in embodiment.

Fig. 9 is the structural schematic diagram after two side flaps of one of embodiment hose safety transfusion needle are equivalent in opposite directions.

Figure 10 is the structural schematic diagram when fin of one of embodiment hose safety transfusion needle is fixed on casing.

Figure 11 is one of embodiment hose safety transfusion needle with the perspective view under packaging sheath state.

Figure 12 is the perspective view of the packaging sheath of one of embodiment hose safety transfusion needle.

It is the schematic diagram for characterizing the second infusion channel that Figure 13, which is in embodiment,.

Figure 14 is that Figure 13 switches to the schematic diagram under transfusion state.

It is the schematic diagram for characterizing stop bit part that Figure 15, which is in embodiment,.

Figure 16 is the schematic diagram of another sealing structure in embodiment.

Figure 17 is the enlarged view in Figure 16 at A.

Appended drawing reference includes:

Outer needle stand 1, locator projections 11, the first facade 12；

Casing 2, flexible tube section 21, hard tube section 22, hard sleeve 23, buckle 24；

Preceding hose 3；

Interior needle stand 4, guide slot 41, the second facade 42, infusion hole 43, step 44；

Inner flexible tube 5, side opening 51；

Needle core 6；

Fin 7, anti-back protrusion 71；

Pack sheath 8, extension 81, notch 82；

Piston ring 9；

Intermediate plate 10；

Stop bit part 11.

Specific embodiment

It elaborates below in conjunction with specific embodiment to the invention.

A kind of hose safety transfusion needle of the present embodiment, as shown in Figure 1, including inner assembly and outer component, outer component includes Outer needle stand 1, casing 2, intermediate plate 10 and preceding hose 3, preceding hose 3 are fixed on the front end of outer needle stand 1, the front end of casing 2 and outer The rear end of needle stand 1 connects, so that casing 2, outer needle stand 1 and preceding hose 3 are sequentially communicated, outer needle stand 1 is provided with for medical care people Two hand-held side flaps 7 of member.Inner assembly includes the needle core 6 of interior needle stand 4, inner flexible tube 5 and hard, the rear end of needle core 6 and interior needle stand 4 Front end be fixedly connected, the front end of inner flexible tube 5 is connect with the rear end of interior needle stand 4, so that inner flexible tube 5,4 and of interior needle stand Needle core 6 is sequentially communicated.The outside integrated injection molding of interior needle stand 4 has a piston ring 9, the lateral wall of the inner sidewall of casing 2 and inner assembly it Between sealing is realized by the piston ring 9, the longitudinal section of piston ring 9 is in gradually wide Y shape or V shape, function class from back to front It is similar to the Y shape oil sealing of industry accessories, has the outer deployment characteristics of gradual change, roughly the same but there may be the cavity of tolerance difference In interior displacement stroke, it can be changed and dynamic expansion or contraction according to the internal diameter of cavity, and remain close with inner cavity peripheral wall Closure.Original state is as shown in Figure 1, inner flexible tube 5 is threaded through in casing 2, and interior needle stand 4 is in outer needle stand 1, and needle core 6 runs through It is pierced by preceding hose 3 and from the front end of preceding hose 3.When puncture, medical staff is equivalent in opposite directions two side flaps 7, handles fin 7 It pushes forward, so that needle core 6 is pierced into blood vessel together with the front end of preceding hose 3, after puncturing successfully, medical staff pulls interior soft Pipe 5 retreats interior needle stand 4, inner flexible tube 5 and needle core 6 together, so that needle core 6 is detached from the preceding hose 3, is formed such as Fig. 2 institute The transfusion state shown.In the present embodiment, the mode of hose 3 is that inner assembly is retreated to casing 2 before needle core 6 is detached from, interior needle stand 4 with It is sealed between casing 2, interior needle stand 4 is clamped or fastens the rear end for being fixed on casing 2, and needle core 6 is accommodated in casing 2, soft Preceding hose 3 be left to remain in blood vessels, connect infusion apparatus in the rear end of inner flexible tube 5, liquid successively passes through " needle stand 4- in inner flexible tube 5- The first infusion channel as hose 3 " is infused before the outer needle stand 1- of needle core 6- casing 2-.

Compared with the steel needle transfusion needle in non-indwelling field, preceding hose 3 of the invention is using just the same with classical remaining needle Hose be infused characteristic, be used for be infused preceding hose 3 be made of soft material, can protect blood vessel and overcome traditional steel needle pair Many hazards and risk caused by blood vessel, and its structure and its succinct, manufacturing cost is low, and cost performance is high, has replacement tradition The performance advantage and cost advantage of steel needle infusion, a possibility that providing performance upgrade for infusion field and replace.

It is when extracting needle core 6 after puncturing nothing but although the technical solution in relation to accidentally stabbing is numerous in the prior art Coat needle point, or be accommodated in some separable hard sheath, these schemes be no doubt achieve the purpose that it is anti-error stab, but The interior needle band blood extracted, easily causes secondary pollution, and other are not necessarily in the technical solution for extracting needle core 6, due to needing hard Sheath entangle needle core 6 or hard needle core 6 enter it is whole after sheath can not be bent, then obviously do not have clinical availability, The beneficial effects of the present invention are whole process to close, and can not extract needle core 6, does not have the anxiety for causing secondary pollution, and quasi- in infusion During standby stage, infusion progress stage, catheter retaining and terminal phase of intravenous injection throw aside stage etc. it is whole it is errorless stab risk, rather than Their Occupational Safety Protection is carried out only for the nursing staff of infusion, protection is whole.

Structure of the invention is lightly succinct, is integrally of a straight line type, and in the state of being straightened, and receives the liquid flow of infusion Logical direction is also axial, the resistance minimum of liquid communication, and more it is essential that making to reach safety due to configuration of the invention From beginning to end without the needle core 6 for pulling out hard while purpose, allow to easily connect in advance with the realization of the infusion apparatus of periphery Tipping is matched, this performance is even more important in the medical market of Chinese nursing personnel's scarcity, it is first pierced through before infusion without nurse, Needle core 6 is abandoned again, reconnects infusion apparatus after being then vented, and avoids there is pollution in this process and blood escapes accidentally, it is also big Amount ground reduces nursing labor intensity and cumbersome operating procedure.

For the present invention relative to more than the accessory of existing remaining needle and for structure is complicated, structure is extremely simple, is easy to work Automatic mass is realized in industry processing procedure, advantageously reduces cost, is suitble to large area universal；Relative to traditional steel needle transfusion needle Speech, also due to its pattern, usage are consistent with classical steel needle transfusion needle, simple in structure and low in cost calculates its average combined cost, With traditional steel needle transfusion needle close to even lower than its overall cost, doctor and nursing staff can break steel needle in clinical transfusion Or traditional boundary of remaining needle, not only applicability can be carried out also without prior with all standing using the advantage of top hose infusion Selection, can be disposablely disposable, and indwelling use also can be implemented.

In the present embodiment, as depicted in figs. 1 and 2, the flexible tube section that the leading portion of casing 2 keeps clear after being flexible and bending 21, the back segment itself of casing 2 is hard, to form hard tube section 22, hard tube section 22 is sequentially communicated with flexible tube section 21, inner assembly After retrogressing is fixed, needle core 6 is detached from flexible tube section 21, that is, is detached from the section between hard tube section 22 and outer needle stand 1 of casing 2 Section, the length of casing 2 are twice of 6 length of needle core, and whole needle core 6 is surrounded by hard tube section 22.Certainly in practice, hard tube section 22 Form can also as shown in 3 figures, casing 2 be in itself it is soft, be coated with longer hard sleeve 23 in 2 outer peripheral surface of casing, thus The longer hard tube section 22 formed.Or as shown in 4 figures, shorter hard sleeve 23 is coated on 2 periphery of casing and forms a small segment Hard tube section, only surrounds the front end of needle core 6, and casing 2 is hose in addition to other segments of hard tube section 22.In use process In, it, can be as shown in 5 figures, with the company of flexible tube section 21 although the exposed parts after outer needle stand 1 of transfusion needle are long It connects in place of outer needle stand 1 as fixed point, flexible tube section 21 makees reverse bending relative to direction is punctured, makes hard tube section 22 and outer needle stand 1 simultaneously Column, exposed parts can be pasted and fixed on human body and be punctured near transfusion part, and it is too long and can not fix to avoid exposed parts, Relieve conventional rigid exposed parts it is too long pull caused by unintended risk.Casing 2 include hard tube section 22, interior group After part retrogressing is fixed, needle core 6 is detached from the flexible tube section 21, and 6 front end of needle core is surrounded by hard tube section 22, can effectively be prevented Only casing 2 is pierced through in 6 front end of needle core.

The present invention is guaranteeing that effectively storing and conceal needle core 6 meets except safety needs, extends the flexible tube section of casing 2 21, can as classical steel needle transfusion needle can easily transfusion part do it is back-shaped be fastened, compared to existing The anti-error of remaining needle field stabs technology, and technical solution of the present invention avoids outer 1 rear end hard part of needle stand and stretches out too long and nothing Dangerous, the problem of losing clinical availability, is fixed or fixed to method.The present invention has both simultaneously anti-error to be stabbed function and exact faces Bed availability, while the usage of classical steel needle transfusion needle is also complied fully with, it is not necessarily to mating special sticking cloth or sealer.This hair Bright efficiently solve realizes useful clinically venous indwelling in the case where not pulling out sharp keen interior needle.

In the present embodiment, for the ease of puncturing, the tip portion of the needle core 6 for venipuncture is provided with cutting face.For The availability for meeting remaining needle clinical transfusion has on direction between the needle point cutting face of needle core 6 and blood vessel and requires when puncturing, I.e. the back in needle point cutting face is close to skin penetrating such as blood vessel.However, existing remaining needle or the transfusion needle of non-indwelling, needle core 6 can drop back displacement, and needle core 6 be located in interior needle stand 4 be it is rotatable, which results in assembly, the needle point of needle core 6 The direction in cutting face is uncertain, and the direction in needle point cutting face is easy to happen change after assembly.Medical staff wears in operation When thorn, needs the direction in extra care adjustment needle point cutting face to be punctured again, the requirement of clinical puncture can be met.Increase There is the hidden danger for puncturing and not being able to satisfy clinical requirement in the working strength of medical staff.In the present embodiment, interior needle stand 4 and outer needle Oriented structure is provided between seat 1, oriented structure can limit interior needle stand 4 and rotate.Specifically, oriented structure can be following three One of kind structure:, as shown in fig. 6, oriented structure includes guide slot 41 and locator projections 11, the setting of locator projections 11 exists for the first The outside portion of interior needle stand 4 is arranged in the inside portion of outer needle stand 1, guide slot 41, and locator projections 11 are slideably embedded in guide slot 41 Interior, 11 integrated injection molding of locator projections is in outer needle stand 1, and 41 integrated injection molding of guide slot is in interior needle stand 4.Second such as Fig. 7 Shown, oriented structure includes compatible first facade 12 and the second facade 42, and the inner wall of outer needle stand 1 is arranged in the first facade 12 Face, the second facade 42 are arranged in interior 4 outside wall surface of needle stand.The third as shown in figure 8, oriented structure be outer needle stand 1 inner wall and The outside wall surface of interior needle stand 4, the inner wall of outer needle stand 1 are non-equal diameter and arc surfaces, and the outside wall surface of interior needle stand 4 is also non-equal diameter and arc surfaces, class Like American football shape.In assembly, the direction in the needle point cutting face of needle core 6 is oriented to a fixed-direction of convenient vascular puncture, and And the direction in needle point cutting face will not change after assembling.Medical staff is when operating puncture, the direction in needle point cutting face It will not change, ensure clinical puncture effect, reduce the working strength of medical staff.After the completion of puncture, in 6 fallback procedures of needle core It will not deflect.

As previously described, because using when inner assembly and outer component need relative displacement, therefore need to guarantee inner assembly with It can opposite sliding between outer component.But when puncturing, in order to ensure that the front end of needle core 6 smoothly punctures human body blood Pipe, needs to guarantee that needle core 6 stands fast, that is, needs to guarantee that inner assembly integrally stands fast, otherwise will there is the risk of puncture failure. The existing structure for preventing needle core 6 from retreating is excessively complicated, or needs medical staff to clutch casing 2 energetically to prevent interior needle stand 4 It retreats, makes troubles to medical staff.In addition it after manufacturing pre-assembled, in handling, logistics turnover, product distribution, uses Multiple links such as preceding inspection, which also may enable inner assembly and outer component that sliding occurs, to be caused to be displaced, once needle will be made by generating displacement Core 6 is in position when non-initial position, will be unable to implement to puncture, is resetted and be not easy to, then will lead to remaining needle can not It uses.In the present embodiment, as shown in Figure 1, Figure 2 and shown in Fig. 9, the side of two side flaps 7 is provided with anti-back protrusion 71, the wing of two sides After piece 7 converts into opposite directions, anti-back protrusion 71 pushes casing 2 so that casing 2 resists interior needle stand 4, with the retrogressing of needle stand 4 in prevention.It is real It is also possible to be equipped with anti-back protrusion 71 for only one fin 7 in border.The obstruction of needle stand 4 has following two feelings in 71 pairs of anti-back protrusion Condition, after as shown in figure 9, the fin 7 of two sides is equivalent in opposite directions, anti-back 71 diameters of protrusion are pressed downward the deformation of casing 2, so that set The rear end of interior needle stand 4 is resisted after 2 local dent of pipe.Another as shown in Figure 10, anti-back protrusion 71 is by clamp sleeve 2 come between Connect the lateral wall of needle stand 4 in compressing.Certain actually both of these case can use simultaneously, both keep out the rear end of interior needle stand 4, The lateral wall of needle stand 4 compress again in sufficiently ensures that interior needle stand 4 will not retreat.Fin 7, can also be in addition to being fixed on outer needle stand 1 As shown in Figure 10, fin 7 is fixed on casing 2.As is illustrated by figs. 11 and 12, the remaining needle of the anti-withdraw of the needle further includes packaging sheath 8, packaging sheath 8 can be covered in the front of outer needle stand 1 with pulling out, and packed and be removably clamped between sheath 8 and outer needle stand 1, preceding soft Pipe 3 and needle core 6 are inserted in packaging sheath 8, and packaging sheath 8 is provided with extension 81 and extends after the fin 7 of two sides is equivalent in opposite directions Portion 81 resists fin 7, so that fin 7 keeps folded position, to ensure that needle stand 4 moves back in limitation.It will when dispatching from the factory packaging Fin 7 keeps folded position, leads to needle stand 4 in raised 71 clampings of the anti-back on fin 7 without unexpected sliding occurs Displacement, equivalent limitation to fin 7 can be released by pulling out packaging sheath 8, restore the original appearance that fin 7 is unfolded.Extension 81 is set It is equipped with notch 82, after the fin 7 of two sides is equivalent in opposite directions, the position by grip of fin 7 is exposed to outside notch 82, so as to medical care people Member pinches fin 7, then extracts packaging sheath 8.In use, connection infusion apparatus exhaust is ready, two sides are clutched as shown in figure 11 Packaging sheath 8 is pulled out after fin 7, after implementing venipuncture, unclamping fin 7 makes its expansion, then relieves the limit of internal needle stand 4 Position, gently pushes down fin 7, before keeping the front end of hose 3 in the blood vessels, pull inner flexible tube 5 make needle core 6 from it is as shown in Figure 1 just Beginning position displacement is accommodated in needle core 6 in casing 2 safely, later according to transfusion nursing routine to infusion position as shown in Figure 2 Fixed tab 7.

Since inner assembly needs to retreat in casing 2, forming " the outer needle stand 1- of needle stand 4- needle core 6- casing 2- in inner flexible tube 5- Infusion channel as preceding hose 3 " needs to seal in order to avoid the liquid leakage in casing 2 between inner assembly and casing 2, passes The remaining needle of system, which additionally needs, is cased with sealing ring in the outside of interior needle stand 4, in this way in the outside of needle stand 4 need that there are installations to seal The slot position of circle, while needing to ensure the wall thickness of interior needle stand 4, within the diameter of needle stand 4 need to be made bigger, corresponding outside Casing 2 diameter it is also larger.In addition, it is necessary to which corresponding structure is arranged in the rear end of casing 2 to lock inner assembly, inner assembly Locking, the sealing needs between inner assembly and casing 2 different structures realize that overall structure is complex, manufacturing cost It is high.In the present embodiment, as depicted in figs. 1 and 2, the outside integrated injection molding of interior needle stand 4 has a piston ring 9, the inner sidewall of casing 2 with it is interior Sealing is realized between the lateral wall of hose 5 by the piston ring 9, and under transfusion state, the piston ring 9 is lockable The rear end of described sleeve pipe 2.Specifically, piston ring 9 is soft or hard.The longitudinal section of piston ring 9 is in from back to front Gradually wide Y shape or V shape, such piston ring 9 can squeeze flexible deformation with the inner wall of sleeve 2, to closely paste between casing 2 It closes, advantage also resides in once clinically nursing staff has and is such as displaced maloperation not in place etc, the piston of Y shape or V shape 9 structure of ring has the characteristics that inversely to advance, and can prevent hard needle core 6 from protracting again and enter blood vessel, can also ensure it It is fluid tight, leak infusion pipeline not.Piston ring 9 is locked at the mode of the rear end of casing 2, and first way is as shown in Fig. 2, set The rear end of pipe 2 is hard and is provided with buckle 24, and under transfusion state, the piston ring 9 is buckled in the buckle 24.The Two kinds of modes are as shown in figure 14, and the rear end of casing 2 is hard, and are provided with narrowed structure, under transfusion state, piston ring The rear end of 9 sleeves 2 compresses deformation, thus be clamped and fixed in the rear end of casing 2, when using the piston ring 9 of Y shape, It indicates to retreat in place when seeing piston ring 9 from the rear end of casing 2.The third mode is as shown in figure 15, the rear end of casing 2 Portion is arranged with the stop bit part 11 of hard, and under transfusion state, the piston ring 9 compresses deformation indirectly by stop bit part 11, thus by It is fixedly clamped in the rear end of casing 2, three of the above mode can be replaced mutually in practice certainly.It can be achieved to live with upper type Plug ring 9 is locked in the rear end of casing 2.Compared with prior art, piston ring 9 of the invention is fixed on the periphery of inner assembly Face, there is no need in interior needle stand 4, there are the slot positions for installing traditional seal, therefore the diameter of interior needle stand 4 can be set Smaller, the diameter of corresponding casing 2 can also be made smaller, and compact overall structure is simple.The piston ring 9 one of the present embodiment Aspect is as the sealing element between 2 inner sidewall of casing and the lateral wall of inner flexible tube 5, on the other hand under transfusion state, Neng Gousuo Tight inner assembly forms infusion channel, multi-purpose content, without the sealing element as tradition and locking member difference in the rear end of casing 2 Setting, therefore the structure of the present embodiment is more compact simple, cost is also less expensive.As shown in Figure 13 or Figure 14, piston ring 9 is viscous It connects on fixed inner flexible tube 5, also can be realized the purpose that the present embodiment piston ring 9 takes into account sealing and locking in this way.Such as Figure 16 With shown in Figure 17, the another way of sealing structure, the front end of inner flexible tube 5 covers outside the interior needle stand 4, before inner flexible tube 5 End expansion pushes against the medial surface of casing 2, forms sealing structure.

The present invention realizes compared with classical remaining needle in small dimension (such as 26G) and big specification (such as 16G) this two poles of the earth model Commonly used possibility, in the application of small dimension model, due to the thin-walled feature by preceding hose 3, small-bore conduit is still It can guarantee biggish infusion flow, therefore infant transfusion extremely relies on it for counsel, but such small dimension remaining needle adds because its is small Work is difficult, cost weight, causes expensive, and several times of prices of usually conventional remaining needle are not easy to be widely applied；And big specifications and models It is applied to operating room more, the emergency infusion of big flow is dealt with its heavy caliber, however the such application of operating room is general all rarely seen The trace of remaining needle, reason are to need to use in the structure of traditional remaining needle closure member made of rubber for closing needle core 6 The rear end of casing 2 after extraction, the closure member through-hole are passed through for the hard needle core 6 of larger caliber, after storage some cycles Due to the fatigue of material, extracting can not effectively be closed after hard needle core 6, and yields is extremely low, also result in that it is expensive is difficult to It is widely used, and advantage of the invention therefore is also asked without series caused by fatigue of materials then without the closure member is arranged Topic, manufacturing cost can maintain cheap manufacturing cost and rate of good quality rate, have widely applied base as other specifications Plinth.

In the technical solution of the present invention, stroke of the interior needle stand 4 in 2 inner cavity of casing is to march to hard portion from soft part Part, soft part is based on its expandable characteristics, and the piston ring 9 of interior needle stand 4 needs periphery expansion just to can ensure that its is fluid tight, and When hard part, hard part do not have can extensional, the piston ring 9 on interior needle stand 4, which needs to shrink, could remain fluid-tight It swimmingly slides simultaneously, the V-arrangement or Y shape piston ring 9 of elastically deformable are ensured that and smoothly completed in displacement stroke from soft interior The seamless transitions of cavity hard inner cavity, and guarantee that its is fluid tight constant；The V-arrangement or Y shape piston ring 9 of elastically deformable simultaneously, The air of inner cavity can be simultaneously effective cleared when displacement, it is fluid tight after guaranteeing displacement.

Needle core 6 is detached from preceding hose 3, and inner assembly needs to retreat to casing 2, forms " needle stand 4- needle core 6- in inner flexible tube 5- Infusion channel as hose 3 " before the outer needle stand 1- of casing 2-, however the diameter very little of needle core 6, flow through the amount of liquid of needle core 6 by To limitation, therefore the amount of infusion of above-mentioned infusion channel is smaller, and speed is also slow, and usually can not meet clinical use needs It asks.In the present embodiment, as depicted in figs. 1 and 2, the inside of interior needle stand 4 offers the infusion hole 43 being arranged in juxtaposition with needle core 6, defeated Fluid apertures 43 is the looping pit of non-full circle, and preferably semicircular ring, the two-port of infusion hole 43 is respectively communicated with inner flexible tube 5 and casing 2, It under transfusion state as shown in Figure 2, is formed second as " hose 3 before the outer needle stand 1- of inner flexible tube 5- infusion hole 43- casing 2- " Infusion channel, as indicated by a dashed arrow in the figure.Interior needle stand 4 is internally provided with step 44, and step 44 resists the front end of inner flexible tube 5 Portion, so that the front port of inner flexible tube 5 is mutually separated with the infusion hole 43, it is therefore an objective to the tube wall of inner flexible tube 5 be avoided to keep out infusion Hole 43, plays the role of shunting.The another embodiment of second infusion channel, as shown in Figure 13 and Figure 14, in inner flexible tube 5 Tube wall offers side opening 51, and the outside of inner flexible tube 5 is separately bonded with piston ring 9 as hereinbefore, the outside of interior needle stand 4 and casing There are infusion gap between 2 inner sidewall, form that " inner flexible tube 5- side opening 51- is infused the outer needle stand of gap-casing 2- under transfusion state Second infusion channel as hose 3 " before 1-.Certainly the second infusion channel of both examples above can coexist in practice, Meet the clinical transfusion demand of greater flow.Compared with prior art, it does not need to open side opening in interior needle stand 4 in the present embodiment, it is defeated Fluid apertures 43 is that axis is parallel with needle core 6, convenient for die sinking when injection molding, is suitble to produce in enormous quantities, be promoted in production capacity bigger.And Side opening 51 is then the aperture on inner flexible tube 5, and difficulty of processing is smaller.Therefore the present embodiment is easy to process, at low cost.In infusion shape State is also additionally provided with the second infusion channel, therefore can satisfy big stream in addition to the first original infusion channel is infused to human vas The clinical transfusion demand of amount.

In order to enhance indwelling patency when indwelling mode of the present invention uses, as shown in Figure 1, there is set able to turn on or off on casing 2 The intermediate plate 10 of 2 inner cavity of pipe, intermediate plate 10 are mounted on soft segment one end of casing 2, close to outer 1 place of needle stand.Intermediate plate 10 is that one kind can So that the component that infusion access opens or closes, when clinical data shows terminal phase of intravenous injection retention transfusion needle, intermediate plate 10 is closer to preceding Hose 3 then more can effectively stop during indwelling in blood backflow to inner flexible tube 5, be effectively reduced blood back at bolt cause blocking or Reenter the risk of blood vessel.Conventional rigid material can not compactly accommodate the component of intermediate plate 10 or similar type, it is difficult to take into account Thrombotic risk prevention, technical solution of the middle sleeve 2 of the present invention by soft segment in conjunction with hard segment, then simply and effectively solve as What opens and closes the problem of infusion access, and for inlying catheter, safely indwelling provides the safety guarantee that anti-return blood coagulates bolt.Traditional Remaining needle because the needle core that the sheath of accommodating needle core is hard or hard be located in sheath make be integrally it is hard, can not make With intermediate plate, also can not be just infused only liquid.And the application is to guarantee that effectively the safety that needle core meets Anti-stabbing is concealed in storage Property need under the premise of, the leading portion of casing is flexible and the flexible tube section that keeps clear after being bent is needing after the completion of infusion When carrying out indwelling, intermediate plate can be operated and carry out only liquid, the reflux of anti-Hemostatic Oral Liquid, and intermediate plate 10 close to outer needle stand 1, blood-backflow preventing Effect is more preferable.

Finally it should be noted that above embodiments are only to illustrate the technical solution of the invention, rather than to this hair It is bright create protection scope limitation, although being explained in detail referring to preferred embodiment to the invention, this field it is general Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the invention, without departing from this The spirit and scope of innovation and creation technical solution.

Claims (12)

1. a kind of hose safety transfusion needle, including inner assembly and outer component, outer component includes outer needle stand, casing, intermediate plate and preceding soft Pipe, preceding hose is fixed on the front end of outer needle stand, and the front end of casing is connect with the rear end of outer needle stand, so that casing, outside Needle stand and preceding hose are sequentially communicated；

Inner assembly includes the needle core of interior needle stand, inner flexible tube and hard, and the rear end of needle core is fixedly connected with the front end of interior needle stand, interior The front end of hose is connect with the rear end of interior needle stand, so that inner flexible tube, interior needle stand and needle core are sequentially communicated；

Under original state, inner flexible tube is threaded through in casing, and interior needle stand is in outer needle stand, and needle core is applied in preceding hose and the past The front end of hose is pierced by；

Under transfusion state, inner assembly retreats the rear end for being fixed on casing, so that needle core is detached from the preceding hose and is accommodated in In casing, formed successively by infusion channel as " the interior needle stand of the inner flexible tube-- preceding hose of the outer needle stand-of needle core-casing-"；

It is characterized in that: the flexible tube section that the leading portion of described sleeve pipe keeps clear after being flexible and bending, casing is located at flexible tube section Position later is equipped with hard tube section, and needle core is detached from the flexible tube section and inner assembly retreats after being fixed, and needle core is by hard tube section It surrounds.

2. a kind of hose safety transfusion needle according to claim 1, it is characterized in that: the back segment of casing is hard tube section, firmly Pipeline section is sequentially communicated with flexible tube section, and after inner assembly retrogressing is fixed, whole needle core is surrounded by hard tube section.

3. a kind of hose safety transfusion needle according to claim 1, it is characterized in that: after inner assembly retrogressing is fixed, institute State the front end that hard tube section only surrounds needle core.

4. a kind of hose safety transfusion needle according to claim 1 or 2 or 3, it is characterized in that: the back segment of described sleeve pipe itself For hard, to form the hard tube section.

5. a kind of hose safety transfusion needle according to claim 1 or 2 or 3, it is characterized in that: the periphery bread of described sleeve pipe It is covered with hard sleeve, to form the hard tube section.

6. a kind of hose safety transfusion needle according to claim 1, it is characterized in that: being provided between interior needle stand and outer needle stand Oriented structure, oriented structure can limit interior needle stand rotation.

7. a kind of hose safety transfusion needle according to claim 1, it is characterized in that: the two sides of the outer component are respectively set There is fin, the side of at least fin of side is provided with anti-back protrusion, and after the fin of two sides is equivalent in opposite directions, the anti-back is convex It plays diameter and is pressed downward described sleeve pipe so that clamp sleeve residence states interior needle stand or withstands the rear end of the interior needle stand, to prevent in described Needle stand retreats.

8. a kind of hose safety transfusion needle according to claim 7 packs sheath it is characterized in that: further including packaging sheath It can cover with pulling out in the front of outer needle stand, the preceding hose and the needle core are inserted in the packaging sheath, the packaging sheath It is provided with extension, after the fin of two sides is equivalent in opposite directions, the extension resists the fin, and the fin is made to keep equivalent shape The setting of state, the extension is jagged, after the fin of two sides is equivalent in opposite directions, fin it is exposed to described scarce by grip position Mouthful.

9. a kind of hose safety transfusion needle according to claim 1, it is characterized in that: the outer peripheral surface of the inner assembly is fixed with Piston ring, realizes sealing by the piston ring between the inner wall and inner assembly outer peripheral surface of described sleeve pipe, piston ring is indulged Section is in gradually wide Y shape or V shape.

10. a kind of hose safety transfusion needle according to claim 1 is not necessarily to it is characterized in that: the inner assembly is provided with Interior needle stand side-wall hole and the transition passage formed, the transition passage are provided in interior needle stand and are arranged in juxtaposition with needle core Infusion hole, the two-port of infusion hole are respectively communicated with inner flexible tube and casing, under transfusion state, form " inner flexible tube-infusion hole-casing- Another infusion channel as the outer preceding hose of needle stand-".

11. a kind of hose safety transfusion needle according to claim 1 is not necessarily to it is characterized in that: the inner assembly is provided with Interior needle stand side-wall hole and the transition passage formed, the outer peripheral surface of inner flexible tube are provided with the piston ring for sealing anti-leak, institute State the side opening that transition passage is the tube wall being provided between the interior needle stand of inner flexible tube and piston ring, the outside of interior needle stand and casing There are infusion gaps between inner sidewall, form that " inner flexible tube-side opening-infusion gap-outer needle stand-of casing-is preceding soft under transfusion state Another infusion channel as pipe ".

12. a kind of hose safety transfusion needle according to claim 1 or 2, it is characterized in that: the intermediate plate is arranged in the set The flexible tube section of pipe, and be located in place of the close outer needle stand of flexible tube section.