阅读说明：本技术 一种防刺伤头皮针 (Scalp acupuncture of preventing stabbing ) 是由 李慧 于 2021-10-11 设计创作，主要内容包括：本发明公开了一种防刺伤头皮针,包括外套管、钢针组件和调节件,外套管内部设有一安装通道,安装通道两端分别贯穿至外套管两端,外套管一侧设有一翼片,钢针组件设于安装通道内,且可沿外套管长度方向进行移动,钢针组件可在第一位置和第二位置之间进行调节,当钢针组件处于第一位置时,钢针组件前端收纳于安装通道内,当钢针组件处于第二位置时,钢针组件前端由外套管前端伸出,调节件设于外套管尾端,用以驱动钢针组件在第一位置和第二位置之间进行转换,其中,针翼上还设有一锁死机构,用于在钢针组件使用完成后将其锁死在第一位置,本发明结构简单,使用方便,实用性强,安全性高。(The invention discloses a scalp acupuncture preventing device, which comprises an outer sleeve, a steel needle assembly and an adjusting piece, wherein an installation channel is arranged in the outer sleeve, two ends of the installation channel respectively penetrate through two ends of the outer sleeve, one side of the outer sleeve is provided with a fin, the steel needle assembly is arranged in the installation channel and can move along the length direction of the outer sleeve, the steel needle assembly can be adjusted between a first position and a second position, when the steel needle assembly is positioned at the first position, the front end of the steel needle assembly is accommodated in the installation channel, when the steel needle assembly is positioned at the second position, the front end of the steel needle assembly extends out from the front end of the outer sleeve, the adjusting piece is arranged at the tail end of the outer sleeve and is used for driving the steel needle assembly to be switched between the first position and the second position, a locking mechanism is also arranged on a needle wing and is used for locking the steel needle assembly at the first position after the use of the steel needle assembly is finished, the scalp acupuncture preventing device is simple in structure, convenient to use, the practicality is strong, and the security is high.)

1. An anti-stab scalp needle, comprising:

the outer sleeve is internally provided with an installation channel, two ends of the installation channel respectively penetrate through two ends of the outer sleeve, and one side of the outer sleeve is provided with a fin;

the steel needle assembly is arranged in the installation channel and can move along the length direction of the outer sleeve, the steel needle assembly can be adjusted between a first position and a second position, when the steel needle assembly is at the first position, the front end of the steel needle assembly is contained in the installation channel, and when the steel needle assembly is at the second position, the front end of the steel needle assembly extends out of the front end of the outer sleeve;

the adjusting piece is arranged at the tail end of the outer sleeve and used for driving the steel needle assembly to be switched between a first position and a second position;

and the needle wing is also provided with a locking mechanism for locking the steel needle assembly at a first position after the use of the steel needle assembly is finished.

2. A puncture resistant scalp needle according to claim 1, wherein said steel needle assembly comprises:

a steel needle body;

and one end of the tail pipe is connected with the rear end of the steel needle body, and the other end of the tail pipe extends out of the rear end of the outer sleeve and is connected with a transfusion pipe.

3. A puncture resistant scalp needle according to claim 2, wherein said adjustment member comprises:

the front end of the rotating part is sleeved at the rear end of the outer surface of the outer sleeve and can rotate along the axis of the outer sleeve;

the connecting part is connected to the rear end of the rotating part and is arranged on the outer surface of the tail pipe;

the tail pipe is characterized in that an internal thread is arranged inside the connecting part, an external thread is arranged on the outer surface of the tail pipe, and the connecting part is in threaded connection with the tail pipe.

4. A puncture-preventing scalp needle according to claim 3, wherein the outer surface of the outer sleeve is provided with an annular groove, and the annular groove extends along the circumference of the outer sleeve;

the rotation portion inner wall front end is equipped with an annular arch, the annular is protruding to be followed rotation portion circumference extends, the annular arch is located in the ring channel, and can follow the outer tube axis rotates.

5. A puncture-proof scalp needle according to claim 3, wherein the outer surface of the rotating portion is provided with anti-slip lines.

6. The scalp acupuncture of claim 1, wherein the inner wall of the installation passage is provided with a limiting protrusion, the outer surface of the tail tube is provided with a limiting groove at a side opposite to the limiting protrusion, the limiting groove extends along the length direction of the tail tube, and one end of the limiting protrusion is arranged in the limiting groove.

7. A puncture resistant scalp needle according to claim 2, wherein said locking mechanism comprises:

the middle part of the wing piece is provided with an installation groove, the installation groove extends along the left-right direction, one end of the installation groove penetrates into the installation channel, and the sliding piece is arranged in the installation groove;

the clamping piece is annular and is sleeved outside the tail pipe, and one side of the clamping piece is connected with the sliding piece;

the locking piece is arranged at the other end of the sliding piece, the upper surface and the lower surface of the locking piece are respectively provided with a limiting piece, the wall of the mounting groove, which is far away from the clamping piece, is provided with a retreating groove, and the upper wall and the lower wall of the retreating groove are respectively provided with a locking groove convenient for the limiting piece to be buckled;

the sliding piece can be adjusted to a fourth position from a third position, when the sliding piece is located at the third position, the clamping piece is in clearance fit with the tail pipe, the locking piece is located outside the retreat groove, when the sliding piece is located at the fourth position, one side face of the clamping piece clamps the tail pipe, the locking piece is inserted into the retreat groove, and the two limiting pieces are buckled in the locking groove respectively.

8. The scalp needle according to claim 7, wherein a retaining portion is provided on an inner wall of the retaining member on a side thereof away from the slider, the retaining portion being shaped to fit the external thread;

when the sliding piece is located at the fourth position, the clamping part is arranged in the thread groove of the external thread.

9. The scalp acupuncture of claim 7, wherein the front and rear walls of the mounting groove are provided with a sliding groove, and the sliding groove extends in the left-right direction;

the front side face and the rear side face of the sliding piece are respectively provided with a sliding protrusion, and the sliding protrusions are respectively arranged in the sliding groove in a sliding mode.

10. The scalp acupuncture of claim 1, wherein the front end of the installation channel is provided with an adsorption piece, and the adsorption piece is coated on the surface of the steel needle body.

Technical Field

The invention relates to the field of medical instruments, in particular to a puncture-preventing scalp acupuncture.

Background

Scalp acupuncture is a common medical facility of everybody, be applicable to and use the more infusion hall of disposable scalp acupuncture, work load is big, the rhythm is fast, the flow of people is big, use when also being applicable to ordinary ward blood sampling, and current scalp acupuncture simple structure, and after using, its syringe needle part is lost for a long time because of the enclosing cover and is exposed outside easily, thereby make medical personnel take place the puncture when receiving and pick up, thereby cause cross infection, seriously threaten medical personnel's personal safety, and simultaneously, some illegal personnel can collect the syringe needle after using and handle, in order to carry out the secondary use, cause serious harm to medical environment more.

Therefore, there is a need for further improvements in the prior art.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a puncture-preventing scalp needle.

In order to achieve the purpose, the anti-puncture scalp needle comprises an outer sleeve, a steel needle assembly and an adjusting piece.

The outer sleeve is characterized in that an installation channel is arranged inside the outer sleeve, two ends of the installation channel respectively penetrate through two ends of the outer sleeve, and one side of the outer sleeve is provided with a fin.

The steel needle subassembly is located in the installation passageway, and can follow outer sleeve length direction removes, the steel needle subassembly can be adjusted between primary importance and second position, works as when the steel needle subassembly is in the primary importance, the steel needle subassembly front end accomodate in the installation passageway, works as when the steel needle subassembly is in the second place, the steel needle subassembly front end by the outer sleeve front end stretches out.

The adjusting piece is arranged at the tail end of the outer sleeve and used for driving the steel needle assembly to be switched between a first position and a second position.

And the needle wing is also provided with a locking mechanism for locking the steel needle assembly at a first position after the use of the steel needle assembly is finished.

In addition, the anti-puncture scalp needle according to the above embodiment of the invention may have the following additional technical features:

according to one embodiment of the invention, the steel needle assembly comprises a steel needle body and a tail tube.

One end of the tail pipe is connected with the rear end of the steel needle body, and the other end of the tail pipe extends out of the rear end of the outer sleeve and is connected with a transfusion pipe.

According to one embodiment of the present invention, the adjusting member includes a rotating portion and a connecting portion.

The front end of the rotating part is sleeved at the rear end of the outer surface of the outer sleeve and can rotate along the axis of the outer sleeve;

the connecting part is connected to the rear end of the rotating part, and the connecting sleeve is arranged on the outer surface of the tail pipe;

the tail pipe is characterized in that an internal thread is arranged inside the connecting part, an external thread is arranged on the outer surface of the tail pipe, and the connecting part is in threaded connection with the tail pipe.

According to one embodiment of the invention, the outer surface of the outer sleeve is provided with an annular groove, and the annular groove extends along the circumferential direction of the outer sleeve;

the rotation portion inner wall front end is equipped with an annular arch, the annular is protruding to be followed rotation portion circumference extends, the annular arch is located in the ring channel, and can follow the outer tube axis rotates.

According to one embodiment of the invention, the outer surface of the rotating part is provided with anti-slip threads.

According to one embodiment of the invention, the inner wall of the installation channel is provided with a limiting convex edge, one side surface of the outer surface of the tail pipe opposite to the limiting convex edge is provided with a limiting groove, the limiting groove extends along the length direction of the tail pipe, and one end of the limiting convex edge is arranged in the limiting groove.

According to one embodiment of the invention, the deadlocking mechanism comprises a slider, a catch and a deadlocking member,

the middle part of the wing piece is provided with an installation groove, the installation groove extends along the left and right directions, one end of the installation groove penetrates into the installation channel, and the sliding piece is arranged in the installation groove;

the clamping piece is annular, the clamping piece is sleeved outside the tail pipe, and one side of the clamping piece is connected with the sliding piece;

the locking piece is arranged at the other end of the sliding piece, the upper surface and the lower surface of the locking piece are respectively provided with a limiting piece, the wall of the mounting groove far away from the clamping piece is provided with a retreating groove, and the upper wall and the lower wall of the retreating groove are respectively provided with a locking groove convenient for the limiting pieces to be buckled;

the sliding piece can be adjusted to a fourth position from a third position, when the sliding piece is located at the third position, the clamping piece is in clearance fit with the tail pipe, the locking piece is located outside the retreat groove, when the sliding piece is located at the fourth position, one side face of the clamping piece clamps the tail pipe, the locking piece is inserted into the retreat groove, and the two limiting pieces are buckled in the locking groove respectively.

According to one embodiment of the invention, a clamping part is arranged on the inner wall of one side of the clamping piece away from the sliding piece, and the shape of the clamping part is matched with that of the external thread;

when the sliding piece is located at the fourth position, the clamping part is arranged in the thread groove of the external thread.

According to one embodiment of the invention, the front and rear groove walls of the mounting groove are provided with a sliding groove, and the sliding groove extends along the left and right directions;

the front side face and the rear side face of the sliding piece are respectively provided with a sliding protrusion, and the sliding protrusions are respectively arranged in the sliding groove in a sliding mode.

According to one embodiment of the invention, the front end of the installation channel is provided with an adsorption piece, and the adsorption piece is coated on the surface of the steel needle body.

According to the puncture-preventing scalp needle provided by the embodiment of the invention, before use, the steel needle assembly can be adjusted to the first position through the adjusting piece, when the puncture-preventing scalp needle is used, the steel needle assembly can be adjusted to the second position through the adjusting piece so as to facilitate puncture, after use, the steel needle assembly can be adjusted to the first position through the adjusting piece so that the front end of the steel needle assembly is accommodated in the outer sleeve, so that puncture injury to medical staff caused by picking up the steel needle assembly and cross infection are avoided, and the steel needle assembly is locked at the first position through the locking assembly so as to avoid accidental adjustment of the steel needle assembly to the second position and avoid recovery and secondary use of illegal staff.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure in an embodiment of the present invention;

FIG. 2 is an exploded view of the overall structure of an embodiment of the present invention;

FIG. 3 is a state diagram of the overall structure change in the embodiment of the present invention;

FIG. 4 is a cross-sectional view of the overall structure in an embodiment of the present invention;

FIG. 5 is a schematic view of the overall structure of a sliding member according to an embodiment of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 4 according to an embodiment of the present invention;

FIG. 7 is a schematic view showing the overall structure of an adjusting member according to an embodiment of the present invention;

FIG. 8 is a partial cross-sectional view of an outer sleeve in an embodiment of the invention.

Reference numerals:

an outer sleeve 10;

installing a channel 101;

a limit rib 1011;

a fin 102;

a mounting groove 1021;

a relief groove 1022;

a lock groove 1023;

a chute 1024;

an adjusting member 103;

a rotation portion 1031;

an annular projection 10311;

anti-skid threads 10312;

a connecting portion 1032;

an annular groove 104;

an adsorbing member 105;

a steel needle assembly 20;

a steel needle body 201;

a tail pipe 202;

a limit groove 2021;

a locking mechanism 30;

a slider 301;

a slide boss 3011;

a catch 302;

a catch 3021;

a deadlocking member 303;

a spacing piece 3031.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A puncture-preventing scalp needle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 8, a puncture-preventing scalp needle according to an embodiment of the present invention includes an outer cannula 10, a steel needle assembly 20, and an adjusting member 103.

An installation channel 101 is arranged inside the outer sleeve 10, two ends of the installation channel 101 respectively penetrate through two ends of the outer sleeve 10, and a fin 102 is arranged on one side of the outer sleeve 10.

The steel needle assembly 20 is arranged in the installation channel 101 and can move along the length direction of the outer sleeve 10, the steel needle assembly 20 can be adjusted between a first position and a second position, when the steel needle assembly 20 is located at the first position, the front end of the steel needle assembly 20 is contained in the installation channel 101, and when the steel needle assembly 20 is located at the second position, the front end of the steel needle assembly 20 is extended out of the front end of the outer sleeve 10.

The adjusting member 103 is disposed at the rear end of the outer sleeve 10 for driving the needle assembly 20 to switch between the first position and the second position.

Wherein, the needle wing is further provided with a locking mechanism 30 for locking the steel needle assembly 20 at the first position after the use.

Based on the above, before use, the steel needle assembly 20 can be adjusted to the first position by the adjusting member 103, when in use, the steel needle assembly 20 can be adjusted to the second position by the adjusting member 103 so as to facilitate puncturing, after use, the steel needle assembly 20 can be adjusted to the first position by the adjusting member 103 so that the front end of the steel needle assembly 20 is accommodated in the outer sleeve 10 so as to avoid stabbing to medical staff when in collection and cross infection, and the steel needle assembly 20 is locked at the first position by the locking assembly so as to avoid accidental or misoperation of the steel needle assembly 20 to the second position and avoid illegal staff from recycling for secondary use.

Preferably, in one embodiment of the present invention, the steel needle assembly 20 includes a steel needle body 201 and a tail tube 202.

One end of the tail tube 202 is connected with the rear end of the steel needle body 201, and the other end of the tail tube 202 extends out of the rear end of the outer sleeve 10 and is connected with an infusion tube.

Thus, because one end of the tail pipe 202 is connected with the rear end of the steel needle body 201, the other end of the tail pipe 202 extends out of the rear end of the outer sleeve 10 and is connected with the infusion tube, so that the liquid medicine can be sent into the steel needle body 201 through the tail pipe 202, and meanwhile, the position of the steel needle can be adjusted by adjusting the position of the tail pipe 202, as the optimization, the tail pipe 202 can be made of plastic materials, so that the processing and the production are convenient, and the production cost is low.

Preferably, in an embodiment of the present invention, the adjusting member 103 includes a rotating portion 1031 and a connecting portion 1032.

The front end of the rotating part 1031 is sleeved at the rear end of the outer surface of the outer sleeve 10 and can rotate along the axis of the outer sleeve 10;

the connecting part 1032 is connected to the rear end of the rotating part 1031, and the connecting sleeve is arranged on the outer surface of the tail pipe 202;

the connecting portion 1032 is internally provided with internal threads, the outer surface of the tail pipe 202 is provided with external threads, and the connecting portion 1032 and the tail pipe 202 are in threaded connection.

Therefore, the front end of the rotating part 1031 is sleeved at the rear end of the outer surface of the outer sleeve 10 and can rotate along the axis of the outer sleeve 10, the connecting part 1032 is connected to the rear end of the rotating part 1031, and the connecting part 1032 and the tail pipe 202 form threaded connection, so that the tail pipe 202 can be driven to move back and forth only by rotating the rotating part 1031 during adjustment so as to control the memorial adjustment of the steel needle assembly 20 between the first position and the second position, and the adjusting mode is simple, convenient, stable and reliable.

Preferably, in an embodiment of the present invention, the outer surface of the outer sleeve 10 is provided with an annular groove 104, and the annular groove 104 extends along the circumference of the outer sleeve 10;

the front end of the inner wall of the rotating part 1031 is provided with an annular protrusion 10311, the annular protrusion 10311 extends along the circumferential direction of the rotating part 1031, and the annular protrusion 10311 is arranged in the annular groove 104 and can rotate along the axis of the outer sleeve 10.

Thus, the outer surface of the outer sleeve 10 is provided with an annular groove 104, the front end of the inner wall of the rotating part 1031 is provided with an annular protrusion 10311, and the annular protrusion 10311 is arranged in the annular groove 104 and can rotate along the axis of the outer sleeve 10, so that the rotating part 1031 can be stably installed on the outer sleeve 10 to avoid falling off, and it can be understood that the annular protrusion 10311 and the annular groove 104 are in clearance fit, so that the rotating part 1031 can rotate along the axis of the outer sleeve 10.

Preferably, in an embodiment of the present invention, the outer surface of the rotating part 1031 is provided with anti-slip threads 10312.

Therefore, medical staff can adjust the steel needle assembly 20 more conveniently and quickly, and the steel needle assembly is not easy to slip.

Preferably, in an embodiment of the present invention, a limiting protrusion 1011 is disposed on an inner wall of the installation channel 101, a limiting groove 2021 is disposed on a side surface of the outer surface of the tail pipe 202 opposite to the limiting protrusion 1011, the limiting groove 2021 extends along the length direction of the tail pipe 202, and one end of the limiting protrusion 1011 is disposed in the limiting groove 2021.

Thus, a limiting convex edge 1011 is arranged on the inner wall of the installation channel 101, a limiting groove 2021 is arranged on one side surface of the outer surface of the tail pipe 202 opposite to the limiting convex edge 1011, and one end of the limiting convex edge 1011 is arranged in the limiting groove 2021, so that the tail pipe 202 can be limited to limit the tail pipe 202 to rotate along the axis of the tail pipe 202, and the tail pipe 202 is driven to move back and forth when the rotating part 1031 rotates.

Preferably, in one embodiment of the present invention, the deadlocking mechanism 30 comprises a slider 301, a catch 302 and a deadlocking member 303,

the middle part of the wing piece 102 is provided with an installation groove 1021, the installation groove 1021 extends along the left and right direction, one end of the installation groove 1021 penetrates into the installation channel 101, and the sliding piece 301 is arranged in the installation groove 1021;

the retaining member 302 is annular, the retaining member 302 is sleeved outside the tail pipe 202, and one side of the retaining member 302 is connected with the sliding member 301;

the locking piece 303 is arranged at the other end of the sliding piece 301, the upper and lower surfaces of the locking piece 303 are both provided with a limiting piece 3031, the wall of the mounting groove 1021 far away from the clamping piece 302 is provided with a retreating groove 1022, and the upper and lower walls of the retreating groove 1022 are both provided with a locking groove 1023 convenient for buckling of the limiting piece 3031;

the sliding member 301 can be adjusted to a fourth position at a third position, when the sliding member 301 is located at the third position, the retaining member 302 and the tail pipe 202 are in clearance fit, and the dead lock member 303 is located outside the retreat slot 1022, when the sliding member 301 is located at the fourth position, one side surface of the retaining member 302 retains the tail pipe 202, the dead lock member 303 is inserted into the retreat slot 1022, and the two limiting pieces 3031 are respectively buckled in the locking slot 1023.

Based on the above, since the retaining member 302 is annular, and the retaining member 302 is sleeved outside the tail pipe 202, when the sliding member 301 is located at the third position, the retaining member 302 and the tail pipe 202 are in clearance fit, that is, the tail pipe 202 can move freely in the front-rear direction, and when the steel needle assembly 20 is used and adjusted to the first position, the sliding member 301 can be adjusted to the fourth position, so that one side of the retaining member 302 is retained against the tail pipe 202 to limit the movement of the tail pipe 202, it should be noted that the two limiting pieces 3031 can bend to the left end to some extent along with the pressure, so that when the locking member 303 enters the retraction groove, the limiting piece 3031 bends to the left, and when the limiting piece 3031 moves to the locking groove 1023, spacing piece 3031 can resume after losing pressure to the lock is in the locking groove 1023, so, can die the sliding part lock at the fourth position, promptly tail pipe 202 is died by the lock, in order to restrict steel needle subassembly 20 removes to the second position by the primary importance, and its practicality is strong, and the security is high.

Preferably, in an embodiment of the present invention, a catch 3021 is provided on an inner wall of the catch 302 on a side away from the sliding member 301, and the catch 3021 is shaped to fit with the external thread;

when the sliding member 301 is in the fourth position, the catch 3021 is disposed in the thread groove of the external thread.

Thus, by arranging the clamping part 3021 on the inner wall of the side of the clamping member 302 away from the sliding member 301, and the shape of the clamping part 3021 is matched with the external thread, when the sliding member 301 is adjusted to the fourth position, one side surface of the clamping member 302 is close to the surface of the tail pipe 202, and the clamping part 3021 moves into the thread groove of the external thread, so as to clamp the tail pipe 202.

Preferably, in an embodiment of the present invention, a sliding groove 1024 is formed on each of front and rear walls of the mounting groove 1021, and the sliding groove 1024 extends in the left-right direction;

the front side face and the rear side face of the sliding piece 301 are respectively provided with a sliding protrusion 3011, and the two sliding protrusions 3011 are slidably arranged in the sliding groove 1024 respectively.

Therefore, the sliding groove 1024 is formed in the front wall and the rear wall of the mounting groove 1021, the sliding protrusions 3011 are arranged on the front side surface and the rear side surface of the sliding member 301, and the sliding protrusions 3011 are slidably arranged in the sliding groove 1024 respectively, so that the sliding member 301 can slide along the length direction of the sliding groove 1024, and the sliding member 301 can be adjusted from a third position to a fourth position.

Preferably, in an embodiment of the present invention, the front end of the installation channel 101 is provided with an absorption piece 105, and the absorption piece 105 is covered on the surface of the steel needle body 201.

It can be understood that after the puncture needle is used and pulled out, some residual liquid still exists in the puncture needle, so that by providing the adsorption member 105 at the front end of the installation channel 101 and making the adsorption member 105 cover the surface of the steel needle body 201, when the steel needle assembly 20 moves from the second position to the first position, the adsorption member 105 can cover the end of the steel needle body 201, so as to adsorb the internal residual liquid, thereby avoiding the cross infection caused by the outflow of the residual liquid or blood, and preferably, the adsorption member 105 can be made of medical cotton.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.