CN208989883U - It is a kind of easily to take closed type remaining needle - Google Patents

Abstract

The utility model provides one kind and easily takes closed type remaining needle, it is related to medical instruments field, it includes accommodating needle cannula, sealing duct seat, remaining needle, extension tube and infusion connector that this, which easily takes closed type remaining needle, sealing duct seat is connect with one end of accommodating needle cannula, and remaining needle passes through sealing duct seat and is accommodated in accommodating needle cannula.Remaining needle includes needle tubing, connector, takes out line and move with the hand piece, the connection of one end of connector and needle tubing, needle tubing passes through sealing duct seat and is accommodated in accommodating needle cannula, connector is connected to sealing duct seat, the one end for taking out line is connect with connector, it moves with the hand piece and is connect with taking-up line far from one end of connector, and take out line winding and be arranged on connector.Compared to the prior art, one kind provided by the utility model easily takes closed type remaining needle, and sealed reliable not will cause blood backflow, while it is very convenient to take out needle tubing, will not cause secondary injury to patient.

Description

It is a kind of easily to take closed type remaining needle

Technical field

The utility model relates to medical instruments fields, easily take closed type remaining needle in particular to a kind of.

Background technique

The use of venous detaining needle can be reduced patient because repeatedly venipuncture and caused by pain and to have an injection fear To fear sense, mitigate the impatience of family members, is convenient for clinical application, anxious, critical patient rescue medication mitigates the workload of nurse, The pain of patient is reduced, thus venous detaining needle is widely used in clinic.

It in existing venous detaining needle, generally comprises: puncture needle, remaining needle and transfusion catheter.In use, firstly, making User is by the injection position of puncture needle connection remaining needle insertion patient, then, remaining needle is imported patient by puncturing needle guide Blood vessel stays in remaining needle in patient vessel finally, puncture needle is extracted out, and is fixed with application pad pasting.In use, defeated by one Liquid pipe, which is arranged in remaining needle, carries out drop.

Existing venous detaining needle, accommodating causes blood backflow during taking out puncture needle, causes to medical staff Infection risk, meanwhile, when taking-up, needs to pinch syringe needle with hand, since syringe needle position is too small and is inserted into patient body-surface, institute Power can not be made well, if misoperation will result in the secondary injury of patient.

In view of this, design and manufacture that a kind of hermetic type while facilitating takes out needle tubing easily takes closed type remaining needle just to seem It is particularly important.

Utility model content

The purpose of this utility model is to provide one kind easily to take closed type remaining needle, and sealed reliable not will cause blood Reflux, while it is very convenient to take out needle tubing, will not cause secondary injury to patient.

The utility model is that it is realized by adopting the following technical scheme.

It is a kind of easily to take closed type remaining needle, including accommodating needle cannula, sealing duct seat, remaining needle, extension tube and infusion Connector, sealing duct seat are connect with one end of accommodating needle cannula, and remaining needle passes through sealing duct seat and is accommodated in accommodating needle cannula In, one end of extension tube connect with accommodating needle cannula and is arranged close to sealing duct seat, and infusion connector and extension tube are far from accommodating One end of needle cannula connects.Remaining needle includes needle tubing, connector, takes out line and move with the hand piece, and one end of connector and needle tubing connects It connects, needle tubing passes through sealing duct seat and is accommodated in accommodating needle cannula, and connector is connected to sealing duct seat, takes out one end of line It is connect with connector, moves with the hand piece and connect with taking-up line far from one end of connector, and take out line winding and be arranged on connector.

In use, remaining needle is put into accommodating needle cannula, punctures patient body-surface simultaneously using the needle tubing of remaining needle By accommodating needle cannula as needle tubing protrudes into patient body-surface, after reaching predetermined position, sealing duct seat, another are pressed with a hand Pull to pull and move with the hand piece, the taking-up line being wrapped on connector is straightened, pullled outward by hand move with the hand piece drive connector it is outside It is mobile, so that needle tubing be driven to be displaced outwardly, needle tubing is finally extracted, due to the sealing function of sealing duct seat, so that extracting needle tubing After will not generate blood return phenomenon, when needing to be infused, the syringe needle of transfusion bottle is inserted on infusion connector, so that drug is from extension tube Into accommodating needle cannula and human body is eventually entered into, can be repeatedly infused, it is very convenient.

Further, there is in sealing duct seat accommodating inner cavity, accommodating needle cannula protrude into one end of accommodating inner cavity and with it is close Envelope catheter block is detachably connected, and is accommodated and is equipped with sealing block in inner cavity, and sealing block is matched with the side wall sealing of accommodating inner cavity and merged out Equipped with pin hole, needle tubing seals cooperation across pin hole and sealing block.

Further, outer peripheral surface of the accommodating needle cannula close to one end of sealing duct seat is provided with external screw thread, accommodates inner cavity Internal screw thread is provided on the side wall of one end of accommodating needle cannula, sealing duct seat is threadedly coupled with sealing accommodating needle cannula.

Further, the outer peripheral surface of connector is provided with spiral accommodation groove, takes out line and is arranged in spiral accommodation groove.

Further, easily taking closed type remaining needle further includes patch type tongs, and patch type tongs include tongs sheet One side surface of body and flexible splicing piece, flexible splicing piece is coated with bonded adhesives, and tongs ontology is fixedly connected on flexible splicing Another side surface of piece is simultaneously clamped in extension tube.

Further, tongs ontology includes left clip, right clip and clip seat, and clip seat is fixedly connected on flexible splicing Piece, left clip are articulated with the side of clip seat, and right clip is articulated with the other side of clip seat, and left clip and right clip are mutually detained It closes, extension tube is held and mounted between left clip and right clip.

Further, it is provided with grab at the top of left clip, fixture block is provided at the top of right clip, grab and fixture block match It closes, so that left clip is mutually fastened with right clip.

Further, infusion connector includes connecting tube, exhaust valve and buckle head, and one end of connecting tube is connect with extension tube, The connection of the other end of buckle head and connecting tube, the one end of connecting tube close to buckle head is arranged in exhaust valve, for connecting tube to be discharged With the air in extension tube.

Further, buckle head has a snap-in groove, is provided with multiple snap-fit beads on the inner wall of snap-in groove.

It is a kind of easily take closed type remaining needle, including protective case, accommodating needle cannula, sealing duct seat, remaining needle, extension tube with And infusion connector, sealing duct seat are connect with one end of accommodating needle cannula, remaining needle passes through sealing duct seat and is accommodated in accommodating In needle cannula, one end of extension tube connect with accommodating needle cannula and is arranged close to sealing duct seat, and infusion connector is remote with extension tube One end connection from accommodating needle cannula, protective case are set in accommodating needle cannula and are detachably connected with sealing duct seat, be used for Protection accommodating needle cannula.Remaining needle includes needle tubing, connector, takes out line and move with the hand piece, one end connection of connector and needle tubing, Needle tubing passes through sealing duct seat and is accommodated in accommodating needle cannula, and connector is connected to sealing duct seat, take out one end of line with Connector connection is moved with the hand piece and is connect with taking-up line far from one end of connector, and takes out line winding and be arranged on connector.

The utility model has the following beneficial effects:

One kind provided by the utility model easily takes closed type remaining needle, one end company of sealing duct seat and accommodating needle cannula It connects, remaining needle passes through sealing duct seat and is accommodated in accommodating needle cannula, and one end of extension tube connect and leans on accommodating needle cannula Nearly sealing duct seat setting, infusion connector are connect with extension tube far from one end of accommodating needle cannula, and protective case is set in accommodating needle It is detachably connected on casing and with sealing duct seat, for protecting accommodating needle cannula.The connection of one end of connector and needle tubing, needle tubing It across sealing duct seat and is accommodated in accommodating needle cannula, connector is connected to sealing duct seat, takes out one end and the connection of line Head connection is moved with the hand piece and is connect with taking-up line far from one end of connector, and takes out line winding and be arranged on connector.It was using Cheng Zhong, by remaining needle be put into accommodating needle cannula in, using the needle tubing of remaining needle puncture patient body-surface and will accommodating needle cannula with Needle tubing protrudes into patient body-surface, after reaching predetermined position, presses sealing duct seat with a hand, and another, which pulls to pull, moves with the hand piece, will The taking-up line being wrapped on connector is straightened, pullled outward by hand move with the hand piece drive connector be displaced outwardly, to drive needle Pipe is displaced outwardly, and finally extracts needle tubing, due to the sealing function of sealing duct seat, so that it is existing to generate blood back after extracting needle tubing As when needing to be infused, the syringe needle of transfusion bottle being inserted on infusion connector, so that drug enters accommodating needle cannula simultaneously from extension tube Human body is eventually entered into, can be repeatedly infused, it is very convenient.Compared to the prior art, one kind provided by the utility model easily takes Closed type remaining needle, sealed reliable not will cause blood backflow, while it is very convenient to take out needle tubing, will not cause to patient Secondary injury.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is the structural schematic diagram for easily taking closed type remaining needle that the utility model first embodiment provides；

Fig. 2 is the attachment structure schematic diagram of sealing duct seat in Fig. 1；

Fig. 3 is the structural schematic diagram of patch type tongs in Fig. 1；

Fig. 4 is the structural schematic diagram of infusion connector in Fig. 1.

Icon: 100- easily takes closed type remaining needle；110- accommodates needle cannula；130- sealing duct seat；131- accommodates inner cavity； 133- sealing block；150- remaining needle；151- needle tubing；153- connector；155- takes out line；157- moves with the hand piece；170- extension tube； 180- infusion connector；181- connecting tube；183- exhaust valve；185- buckle head；190- patch type tongs；191- tongs sheet Body；The left clip of 1911-；The right clip of 1913-；1915- clip seat；193- flexible splicing piece.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the present invention, it should be noted that term " center ", "upper", "vertical", "horizontal", "inner", The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings or the utility model product The orientation or positional relationship usually put when use, is merely for convenience of describing the present invention and simplifying the description, without referring to Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage Solution is limitations of the present invention.In addition, term " first ", " second " etc. are only used for distinguishing description, and should not be understood as referring to Show or imply relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " connected ", " installation ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.

With reference to the accompanying drawing, it elaborates to some embodiments of the utility model.In the absence of conflict, under The feature in embodiment stated can be combined with each other.

First embodiment

Referring to Fig. 1, the utility model provide it is a kind of easily take closed type remaining needle 100, including it is accommodating needle cannula 110, close Seal catheter block 130, remaining needle 150, extension tube 170, infusion connector 180 and patch type tongs 190, sealing duct seat 130 It being connect with one end of accommodating needle cannula 110, remaining needle 150 passes through sealing duct seat 130 and is accommodated in accommodating needle cannula 110, One end of extension tube 170 connect with accommodating needle cannula 110 and is arranged close to sealing duct seat 130, infusion connector 180 and extension tube 170 one end connections far from accommodating needle cannula 110.Patch type tongs 190 are clamped in extension tube 170, for block or Extension tube 170 is connected, to control infusion process.

Remaining needle 150 includes needle tubing 151, connector 153, takes out line 155 and move with the hand piece 157, connector 153 and needle tubing 151 one end connection, needle tubing 151 pass through sealing duct seat 130 and are accommodated in accommodating needle cannula 110, and connector 153 is connected to Sealing duct seat 130, the one end for taking out line 155 are connect with connector 153, are moved with the hand piece 157 and are taken out line 155 far from connector 153 one end connection, and take out the winding of line 155 and be arranged on connector 153.

In the present embodiment, the outer peripheral surface of connector 153 is provided with spiral accommodation groove, takes out the setting of line 155 and holds in spiral It sets in slot.

In use, remaining needle 150 is put into accommodating needle cannula 110, is pierced using the needle tubing 151 of remaining needle 150 Broken patient body-surface simultaneously will accommodate needle cannula 110 as needle tubing 151 protrudes into patient body-surface, after reaching predetermined position, be pressed with a hand Means of press seals catheter block 130, another, which pulls to pull, moves with the hand piece 157, and the taking-up line 155 being wrapped on connector 153 is straightened, is passed through Hand pull outward move with the hand piece 157 drive connector 153 be displaced outwardly, so that needle tubing 151 be driven to be displaced outwardly, finally extract needle tubing 151, due to the sealing function of sealing duct seat 130, so that blood return phenomenon will not be generated after extracting needle tubing 151, when needing to be infused When, the syringe needle of transfusion bottle is inserted on infusion connector 180, so that drug enters accommodating needle cannula 110 simultaneously finally from extension tube 170 Into human body, can repeatedly be infused, it is very convenient.

Referring to fig. 2, there is accommodating inner cavity 131, accommodating needle cannula 110 protrudes into accommodating inner cavity 131 in sealing duct seat 130 One end is simultaneously detachably connected with sealing duct seat 130, is accommodated and is equipped with sealing block 133 in inner cavity 131, sealing block 133 and accommodating The side wall sealing of inner cavity 131 offers pin hole with merging, and needle tubing 151 seals cooperation across pin hole and sealing block 133.

In the present embodiment, sealing block 133 is rubber sealing block 133, and the interference fit setting of rubber sealing block 133 is accommodating In inner cavity 131, when needle tubing 151 extracts pin hole, rubber sealing block 133 can rapidly close pin hole under the action of extruding force It closes, prevents the blood in accommodating needle cannula 110 from flowing out to the external world by pin hole, avoid medical staff and receive infection.

In the present embodiment, outer peripheral surface of the accommodating needle cannula 110 close to one end of sealing duct seat 130 is provided with outer spiral shell Line, accommodating inner cavity 131 are provided with internal screw thread, sealing duct seat 130 and sealing on the side wall of one end of accommodating needle cannula 110 Needle cannula 110 is accommodated to be threadedly coupled.

Referring to Fig. 3, patch type tongs 190 include tongs ontology 191 and flexible splicing piece 193, flexible splicing piece 193 A side surface be coated with bonded adhesives, tongs ontology 191 is fixedly connected on another side surface of flexible splicing piece 193 and clamps In extension tube 170.

In use, after accommodating needle cannula 110 being inserted into human body surface, flexible splicing piece 193 is bonded in people Body surface face, and tongs ontology 191 is clamped in extension tube 170, it realizes the fixation to extension tube 170, avoids extension tube 170 shakings cause accommodating needle cannula 110 to cause secondary injury to human body.

Tongs ontology 191 includes left clip 1911, right clip 1913 and clip seat 1915, and clip seat 1915 is fixedly connected In flexible splicing piece 193, left clip 1911 is articulated with the side of clip seat 1915, and right clip 1913 is articulated with clip seat 1915 The other side, left clip 1911 and right clip 1913 mutually fasten, and extension tube 170 is held and mounted on left clip 1911 and right clip Between 1913.

In the present embodiment, the top of left clip 1911 is provided with grab, and the top of right clip 1913 is provided with fixture block, card Hook is matched with fixture block, so that left clip 1911 and right clip 1913 mutually fasten.

In other preferred embodiments of the utility model, the top of right clip 1913 is provided with grab, left clip 1911 Top be provided with fixture block, grab is matched with fixture block, so that left clip 1911 and right clip 1913 mutually fasten.

It is worth noting that, left clip 1911 is not restricted to the shape using grab and fixture block with right clip 1913 herein Formula mutually fastens, and is also possible to other fastening forms, such as hasp fastening or interference fastening etc., is not specifically limited herein.

Referring to fig. 4, infusion connector 180 includes connecting tube 181, exhaust valve 183 and buckle head 185, one end of connecting tube 181 It is connect with extension tube 170, buckle head 185 is connect with the other end of connecting tube 181, and the setting of exhaust valve 183 is close in connecting tube 181 One end of buckle head 185, the air for being discharged in connecting tube 181 and extension tube 170.

In this embodiment, buckle head 185 has a snap-in groove, and it is convex that multiple buckles are provided on the inner wall of snap-in groove Muscle.

In infusion, the transfusion needle of transfusion bottle is inserted into infusion connector 180, multiple snap-fit beads form buckle structure, Transfusion needle is buckled in snap-in groove, avoids due to shaking etc. transfusion needle being fallen off from snap-in groove.

In conclusion one kind provided in this embodiment easily takes closed type remaining needle 100, in use, by remaining needle 150 be put into accommodating needle cannula 110 in, using the needle tubing 151 of remaining needle 150 puncture patient body-surface and will accommodating needle cannula 110 with Needle tubing 151 protrude into patient body-surface, after reaching predetermined position, press sealing duct seat 130 with a hand, another is pulled to pull and be dialled Pulling-on piece 157, the taking-up line 155 being wrapped on connector 153 is straightened, and is pullled outward by hand and is moved with the hand the drive connector of piece 157 153 are displaced outwardly, so that needle tubing 151 is driven to be displaced outwardly, it is final to extract needle tubing 151, since the sealing of sealing duct seat 130 is made With so that extract needle tubing 151 after will not generate blood return phenomenon, when needing to be infused, the syringe needle of transfusion bottle is inserted into infusion connector On 180, so that drug enters accommodating needle cannula 110 from extension tube 170 and eventually enters into human body, can repeatedly it be infused, very It is convenient.Compared to the prior art, one kind provided by the utility model easily takes closed type remaining needle 100, sealed reliable, Bu Huizao At blood backflow, while it is very convenient to take out needle tubing 151, and secondary injury will not be caused to patient, securely and reliably, easy to operate.

Second embodiment

Present embodiments providing one kind easily takes closed type remaining needle 100, basic structure and principle and the technology of generation to imitate Fruit is identical with first embodiment, and to briefly describe, the present embodiment part does not refer to place, can refer in corresponding in first embodiment Hold.

It is provided in this embodiment that closed type remaining needle 100 is easily taken to include protective case, accommodate needle cannula 110, sealing duct seat 130, one end of remaining needle 150, extension tube 170 and infusion connector 180, sealing duct seat 130 and accommodating needle cannula 110 connects It connects, remaining needle 150 passes through sealing duct seat 130 and is accommodated in accommodating needle cannula 110, one end of extension tube 170 and accommodating needle The connection of casing 110 is simultaneously arranged close to sealing duct seat 130, and infusion connector 180 and extension tube 170 are far from accommodating needle cannula 110 One end connection, protective case is set in accommodating needle cannula 110 and is detachably connected with sealing duct seat 130, for protecting accommodating Needle cannula 110.

Remaining needle 150 includes needle tubing 151, connector 153, takes out line 155 and move with the hand piece 157, connector 153 and needle tubing 151 one end connection, needle tubing 151 pass through sealing duct seat 130 and are accommodated in accommodating needle cannula 110, and connector 153 is connected to Sealing duct seat 130, the one end for taking out line 155 are connect with connector 153, are moved with the hand piece 157 and are taken out line 155 far from connector 153 one end connection, and take out the winding of line 155 and be arranged on connector 153.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of easily take closed type remaining needle, which is characterized in that including accommodating needle cannula, sealing duct seat, remaining needle, extension tube And infusion connector, the sealing duct seat are connect with one end of the accommodating needle cannula, the remaining needle passes through the sealing Catheter block is simultaneously accommodated in the accommodating needle cannula, and one end of the extension tube connect with the accommodating needle cannula and close to described The setting of sealing duct seat, the infusion connector are connect with the extension tube far from one end of the accommodating needle cannula；

The remaining needle includes needle tubing, connector, takes out line and move with the hand piece, and one end of the connector and the needle tubing connects It connects, the needle tubing passes through the sealing duct seat and is accommodated in the accommodating needle cannula, and the connector is connected to described close Catheter block is sealed, described one end for taking out line is connect with the connector, and the piece and the taking-up line moved with the hand is far from the connection One end connection of head, and taking-up line winding is arranged on the connector.

2. according to claim 1 easily take closed type remaining needle, which is characterized in that have accommodating in the sealing duct seat Inner cavity, the accommodating needle cannula protrude into one end of the accommodating inner cavity and are detachably connected with the sealing duct seat, the appearance It sets and is equipped with sealing block in inner cavity, the sealing block matches to merge with the side wall sealing of the accommodating inner cavity offers pin hole, described Needle tubing seals cooperation across the pin hole and the sealing block.

3. according to claim 2 easily take closed type remaining needle, which is characterized in that the accommodating needle cannula is close to described close The outer peripheral surface for sealing one end of catheter block is provided with external screw thread, side wall of the accommodating inner cavity close to one end of the accommodating needle cannula On be provided with internal screw thread, the sealing duct seat is threadedly coupled with the accommodating needle cannula.

4. according to claim 1 easily take closed type remaining needle, which is characterized in that the outer peripheral surface of the connector is provided with Spiral accommodation groove, the taking-up line are arranged in the spiral accommodation groove.

5. according to claim 1 easily take closed type remaining needle, which is characterized in that described easily closed type remaining needle to be taken also to wrap Including patch type tongs, the patch type tongs include tongs ontology and flexible splicing piece, and the one of the flexible splicing piece Side surface is coated with bonded adhesives, and the tongs ontology is fixedly connected on another side surface of the flexible splicing piece and is clamped in In the extension tube.

6. according to claim 5 easily take closed type remaining needle, which is characterized in that the tongs ontology includes left folder Button, right clip and clip seat, the clip seat are fixedly connected on the flexible splicing piece, and the left clip is articulated with the clip The side of seat, the right clip are articulated with the other side of the clip seat, and the left clip and the right clip mutually fasten, institute Extension tube is stated to be held and mounted between the left clip and the right clip.

7. according to claim 6 easily take closed type remaining needle, which is characterized in that be provided with card at the top of the left clip Hook is provided with fixture block at the top of the right clip, and the grab is matched with the fixture block, so that the left clip and the right side Clip mutually fastens.

8. according to claim 1 easily take closed type remaining needle, which is characterized in that the infusion connector include connecting tube, Exhaust valve and buckle head, one end of the connecting tube are connect with the extension tube, and the buckle head is another with the connecting tube The connecting tube is arranged in close to one end of the buckle head, for the connecting tube and institute to be discharged in end connection, the exhaust valve State the air in extension tube.

9. according to claim 8 easily take closed type remaining needle, which is characterized in that the buckle head has a buckle recessed Slot is provided with multiple snap-fit beads on the inner wall of the snap-in groove.

10. a kind of easily take closed type remaining needle, which is characterized in that including protective case, accommodating needle cannula, sealing duct seat, indwelling Needle, extension tube and infusion connector, the sealing duct seat are connect with one end of the accommodating needle cannula, and the remaining needle passes through The sealing duct seat is simultaneously accommodated in the accommodating needle cannula, and one end of the extension tube is connect simultaneously with the accommodating needle cannula It is arranged close to the sealing duct seat, the infusion connector is connect with the extension tube far from one end of the accommodating needle cannula, The protective case is set in the accommodating needle cannula and is detachably connected with the sealing duct seat, for protecting the accommodating Needle cannula；

The remaining needle includes needle tubing, connector, takes out line and move with the hand piece, and one end of the connector and the needle tubing connects It connects, the needle tubing passes through the sealing duct seat and is accommodated in the accommodating needle cannula, and the connector is connected to described close Catheter block is sealed, described one end for taking out line is connect with the connector, and the piece and the taking-up line moved with the hand is far from the connection One end connection of head, and taking-up line winding is arranged on the connector.