CN113243945A

CN113243945A - Full-automatic biopsy needle with gear shifting structure

Info

Publication number: CN113243945A
Application number: CN202110673653.6A
Authority: CN
Inventors: 施灿辉; 承建荣
Original assignee: Changzhou Xin Neng Yuan Medical Stapler Co ltd
Current assignee: Changzhou Xin Neng Yuan Medical Stapler Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-08-13

Abstract

The invention relates to a full-automatic biopsy needle with a gear shifting structure, which comprises a needle frame assembly, a needle tube frame assembly, a cover body assembly, a sleeve assembly, a gear shifting assembly and a firing connecting rod, wherein the needle frame assembly is arranged on the needle tube frame assembly; the gear shifting assembly comprises a conversion block and a conversion sliding block, wherein front insertion blocks are respectively arranged on two sides of the front end of the conversion block, rear insertion blocks are respectively arranged on two sides of the rear end of the conversion block, gear shifting slots matched with the front insertion blocks and the rear insertion blocks are arranged on the outer wall of the sleeve assembly, a gear shifting spring is arranged between the conversion block and the sleeve assembly, the conversion block is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly, the front insertion blocks and the rear insertion blocks of the conversion block are pressed into the sleeve assembly, a needle tube frame is arranged between the front insertion blocks and the rear insertion blocks, the needle frame is arranged on the rear side of the rear insertion blocks, and the conversion sliding fit sliding block is arranged at the bottom of the rear insertion blocks; the stroke of the needle frame is triggered by the trigger connecting rod and limited by the rear insert block, the needle frame drives the conversion slide block to move, the needle tube frame is triggered by the conversion slide block, and the stroke of the needle tube frame is limited by the front insert block.

Description

Full-automatic biopsy needle with gear shifting structure

Technical Field

The invention relates to the technical field of medical detection equipment, in particular to a full-automatic biopsy needle with a gear shifting structure.

Background

The biopsy needle is a medical appliance, is suitable for kidney, liver, lung, mammary gland, thyroid gland, prostate, pancreas, testis, uterus, ovary, body surface and other organs, and can be used for sampling and sucking cells of centrum tumor, unknown tumor and other living tissues.

Clinically, when examining a patient with a tumor, a biopsy needle is used to remove a certain amount of tissue from the affected site in order to determine the nature of the tumor. The traditional method for biopsy of human tissue in the past is an operative incision method, and the tissue is taken out for biopsy through an operation, and the method has the defects of large wound area, high cost and great pain of patients. In recent years, a biopsy needle is mainly used for tissue biopsy, the biopsy needle comprises a needle body, a needle seat, a needle core and the like, the needle core is inserted into the needle body from the needle seat, the end part of the needle core is provided with a needle groove, the end part of the needle body is provided with a bevel to form a blade-shaped incision, the tissue is taken out by using the biopsy needle, the wound surface is small, the biopsy success rate is high, however, because the parts of patients needing biopsy sampling, such as tissues of prostate, kidney, liver, spleen, mammary gland and the like, the size of suspected tumors needing biopsy is usually different, and therefore, the operation is carried out by using the biopsy needle with a proper ejection stroke and puncture sampling length.

Disclosure of Invention

The invention aims to provide a full-automatic biopsy needle with a gear shifting structure, which is simple in structure and easy to operate and control.

In order to solve the technical problem, the invention provides a full-automatic biopsy needle with a gear shifting structure, which comprises a needle frame assembly, a needle tube frame assembly, a cover body assembly, a sleeve assembly, a gear shifting assembly and a firing connecting rod, wherein the needle frame assembly is arranged on the needle tube frame assembly; the sleeve subassembly is arranged in the lid subassembly, the setting of percussion connecting rod is so that the percussion connecting rod slides along sleeve subassembly axial between sleeve subassembly outer wall and lid subassembly inner wall, needle frame subassembly includes needle frame and biopsy needle, needle tube frame subassembly includes needle tube frame and needle tubing, needle frame, needle tube frame slide and set up in sleeve subassembly, sleeve subassembly setting is stretched out to the front end of needle tubing, the front end of biopsy needle is deep in the needle tube, the gear shift subassembly includes conversion piece, conversion slider, the front end both sides of conversion piece set up preceding inserted block respectively, the rear end both sides of conversion piece set up back inserted block respectively, sleeve subassembly's outer wall sets up the gear shift slot with preceding inserted block, back inserted block looks adaptation, sets up the gear shift spring between conversion piece and the sleeve subassembly, and the conversion piece is arranged in between sleeve subassembly outer wall and the lid subassembly inner wall, the preceding inserted block of conversion piece, The back inserted block is impressed sleeve subassembly back needle pipe support and is arranged in between preceding inserted block and the back inserted block, and the rear side of back inserted block is arranged in to the needle frame, the bottom of back inserted block sets up sliding fit's conversion slider, by percussion connecting rod percussion needle frame when the conversion piece is not pressed, by needle frame percussion needle pipe support, before the conversion piece is pressed in the inserted block, back inserted block stretched into sleeve subassembly, by percussion connecting rod percussion needle frame, the stroke of needle frame is spacing by back inserted block, and needle frame drive conversion slider removes, by conversion slider percussion needle pipe support, the stroke of needle pipe support is spacing by preceding inserted block, realizes the gear regulation of needle frame, needle pipe support removal stroke.

Further, the gear shift subassembly still includes the gear shift button, and the bottom of gear shift button sets up the button inserted block, the middle part of button inserted block sets up the button draw-in groove of I shape, the both sides of button draw-in groove set up the button arch, the last gear shift slot that is suitable for the button inserted block to pass through that sets up of lid subassembly, the inner wall of gear shift slot sets up the gear shift button draw-in groove with the protruding looks adaptation of button, set up the inserted block I post with button draw-in groove looks adaptation on the conversion piece to make the button inserted block of gear shift button pass behind the gear shift slot with the cooperation of pegging graft of inserted block I post, the gear shift button of being convenient for presses the conversion piece, and the conversion piece removes to required position back button protruding card and goes into the gear shift button draw-in groove for it is spacing to the conversion piece.

Further, the top of conversion slider sets up slider I-shaped post, the bottom of preceding inserted block sets up the inserted block spout of I-shaped, the conversion slider is through the inserted block spout sliding fit of slider I-shaped post and preceding inserted block.

Furthermore, a slider spring is arranged in the plug block sliding groove and used for driving the conversion slider to extend out of the back plug block, and the slider spring is compressed when the needle frame triggers the conversion slider to move.

Further, sleeve subassembly is including pegging graft complex location left side sleeve and location right side sleeve, the telescopic outer wall symmetry in location left side sets up the connecting rod stopper, forms the connecting rod spout between two connecting rod stoppers, the anterior and the connecting rod spout sliding fit of percussion connecting rod are led the percussion connecting rod by the connecting rod stopper.

Furthermore, a rectangular gear shifting groove is formed in the positioning right sleeve, the gear shifting slots are arranged at four corners of the gear shifting groove, spring mounting grooves are formed in two ends of the gear shifting groove, and the end portion of the gear shifting spring is arranged in the spring mounting grooves.

Further, location left side sleeve, location right side sleeve all include semicircular first sleeve section of thick bamboo portion and second sleeve section of thick bamboo portion, and location left side sleeve forms first drum with location right side sleeve grafting cooperation back first sleeve section of thick bamboo, and second sleeve section of thick bamboo portion forms the second drum, and the diameter of first drum is greater than the second drum.

Further, full-automatic biopsy needle with gear shift structure still includes the trigger button, the trigger connecting rod includes the connecting rod body, and the front end of connecting rod body sets up the trigger button draw-in groove, set up button card post on the trigger button, set up the trigger window on the lid body assembly, button card post passes behind the trigger window card and goes into the trigger button draw-in groove to the trigger button that drives when making the outer trigger button of lid body assembly remove moves the trigger connecting rod.

Further, the tail end of the connecting rod body is arranged in an L shape, the tail end of the connecting rod body is provided with a sliding support, and a connecting rod slot suitable for the triggering connecting rod to pass through is formed in the first sleeve part, so that the connecting rod body penetrates through the connecting rod slot and then is arranged outside the sleeve assembly.

Further, a needle frame stop block and a connecting rod stop block are arranged in the first sleeve part, a percussion bin is formed between the needle frame stop block and the connecting rod stop block after the left positioning sleeve and the right positioning sleeve are in plug-in fit, and the sliding support is arranged in the percussion bin.

The invention has the technical effects that: (1) compared with the prior art, the full-automatic biopsy needle with the gear shifting structure has the advantages that the conversion block capable of being pressed is arranged, when the conversion block is started, the stroke of the needle tube frame and the needle frame is limited by the front insertion block and the rear insertion block of the conversion block, when the conversion block is not started, the stroke of the needle tube frame and the needle frame is not limited freely, two-gear stroke adjustment is realized, and the full-automatic biopsy needle with the gear shifting structure is used for adapting to different use requirements; (2) the arrangement of the conversion sliding block enables the needle frame to indirectly drive the needle frame through the conversion sliding block when the stroke of the needle frame is limited; (3) by arranging the gear shifting button clamping groove and the button bulge, when the gear shifting button moves to the position where the button bulge is clamped into the gear shifting button clamping groove, the conversion block is limited; (4) the gear shifting spring is arranged to elastically support the conversion block, so that the conversion block can be pressed conveniently; (5) the slider spring is arranged, and the conversion slider is supported by the slider spring when the conversion slider is not triggered, so that the conversion slider protrudes out of the conversion block, and the slider spring is compressed when the conversion slider is triggered.

Drawings

The invention is described in further detail below with reference to the drawings of the specification:

FIG. 1 is a perspective view of a fully automatic biopsy needle having a gear shifting arrangement;

FIG. 2 is a schematic view of an exploded structure after the cover assembly and the sleeve assembly are separated;

FIG. 3 is a schematic perspective view of the upper cover;

FIG. 4 is an enlarged partial schematic view of area A of FIG. 3;

FIG. 5 is a perspective view of the shift assembly;

FIG. 6 is an exploded view of the shift assembly;

FIG. 7 is a perspective view of the shift button;

FIG. 8 is an exploded view of the conversion slide;

FIG. 9 is a perspective view of the sleeve assembly;

FIG. 10 is a schematic perspective view of the positioning of the right sleeve;

FIG. 11 is a perspective view of the positioning left sleeve;

FIG. 12 is a schematic view of the right sleeve positioned at another angle;

FIG. 13 is a perspective view of the firing link;

FIG. 14 is a schematic view of an exploded configuration of the biopsy needle assembly;

FIG. 15 is an exploded view of the biopsy needle assembly;

in the figure:

an upper cover 10, a lower cover 11, a push rod window 12, a firing window 13, a rectangular groove 14, a sleeve limiting groove 16, a gear shifting slot 17, a gear shifting button clamping groove 18,

a left positioning sleeve 20, a right positioning sleeve 21, a needle frame sliding groove 22, a needle frame sliding groove 23, a connecting rod limiting block 24, a needle frame stop block 25, a percussion bin 26, a needle frame stop block 27, a connecting rod stop block 28, a first sleeve part 210, a limiting column 211, a connecting rod slot 212, a second sleeve part 213, a needle frame moving bin 214, a needle frame moving bin 215, a needle frame clamping groove 216, a needle frame clamping groove 217, a gear shifting groove 221, a gear shifting slot 222 and a spring mounting groove 223,

a firing connecting rod 30, a firing button 31, a sliding bracket 32, a limiting bracket 33, a rear sealing cover 34, a firing button clamping groove 35, a connecting rod extrusion groove 38, a connecting rod body 39,

a needle frame 50, a needle frame push rod 51, a needle frame extrusion groove 52, a biopsy needle 53, a needle frame slot 54, a first spring 55, a needle frame buckle 56, a needle frame inserting column 57,

a needle tube rack 60, a needle tube rack push rod 61, a shielding cover 62, a needle tube 63, a needle tube rack slot 64, a second spring 65, a needle tube rack buckle 66, a needle tube rack inserted column 67,

the gear shifting assembly 70, the gear shifting button 71, the button insert block 711, the button clamping groove 712, the button protrusion 713, the conversion block 72, the front insert block 721, the rear insert block 722, the insert block sliding groove 723, the insert block I-shaped column 724, the gear shifting spring 73, the conversion sliding block 74, the sliding block I-shaped column 741, the sliding block spring 742 and the plug 75.

Detailed Description

Example 1

As shown in fig. 1 to 15, the fully automatic biopsy needle with a gear shift structure of the present embodiment includes a cover body assembly, a sleeve assembly, a firing link 30, a firing button 31, a gear shift assembly 70, a needle holder assembly and a needle holder assembly; the cover body assembly comprises an upper cover 10 and a lower cover 11 which are in semi-cylindrical shape and are matched in an inserted mode, rectangular grooves 14 are symmetrically formed in the front portions of the upper cover 10 and the lower cover 11, rectangular gear shifting grooves are symmetrically formed in the upper cover and the lower cover, so that the two rectangular grooves 14 form a firing window 13 after the upper cover 10 and the lower cover 11 are inserted, and the two gear shifting grooves form a gear shifting slot 17.

The sleeve subassembly is arranged in the lid subassembly, and the sleeve subassembly is including pegging graft complex location left sleeve 20 and location right sleeve 21, and location left sleeve 20, location right sleeve 21 all include semicircular first sleeve section of thick bamboo 210 and second sleeve section of thick bamboo 213, and location left sleeve 20 forms first drum with location right sleeve 21 grafting cooperation back first sleeve section of thick bamboo 210, and second sleeve section of thick bamboo 213 forms the second drum, and the diameter of first drum is greater than the second drum.

The upper cover 10 and the lower cover 11 are also internally provided with a sleeve limiting groove 16, the outer wall of the first sleeve part 210 is provided with a limiting column 211 which is in splicing fit with the sleeve limiting groove 16, and the limiting column 211 is arranged in the sleeve limiting groove 16 during assembly and is used for circumferentially positioning the sleeve assembly.

The trigger connecting rod 30 is arranged between the outer wall of the sleeve component and the inner wall of the cover component to enable the trigger connecting rod 30 to slide along the axial direction of the sleeve component, the trigger connecting rod 30 comprises a connecting rod body 39, a trigger button clamping groove 35 is arranged at the front end of the connecting rod body 39, a button clamping column 311 is arranged on the trigger button 31, the button clamping column 311 penetrates through the trigger window 13 and then is clamped into the trigger button clamping groove 35, and the trigger button 31 outside the cover component drives the trigger connecting rod 30 to move when moving.

The tail end of the connecting rod body 39 is arranged in an L shape, the tail end of the connecting rod body 39 is provided with the sliding support 32, and the first sleeve part 210 is provided with a connecting rod slot 212 which is suitable for the connecting rod body 39 of the firing connecting rod 30 to pass through, so that the connecting rod body 39 is arranged outside the second sleeve part 213 after passing through the connecting rod slot 212.

A needle frame stop block 25 and a connecting rod stop block 28 are arranged in the first sleeve part 210, a firing bin 26 is formed between the needle frame stop block 25 and the connecting rod stop block 28 after the left positioning sleeve 20 and the right positioning sleeve 21 are in plug fit, the sliding support 32 is arranged in the firing bin 26, and the connecting rod slot 212 is arranged on the side wall of the firing bin 26.

The outer wall of the left positioning sleeve 20 is symmetrically provided with connecting rod limiting blocks 24, a connecting rod sliding groove is formed between the two connecting rod limiting blocks 24, the front part of the firing connecting rod 30 is in sliding fit with the connecting rod sliding groove, and the firing connecting rod 30 is guided by the connecting rod limiting blocks 24.

The two sides of the rear end of the sliding support 32 are provided with limiting supports 33, and the limiting supports 33 are arranged outside the connecting rod stop 28 during assembly.

The rear end of the retainer bracket 33 is provided with a rear cover 34 for closing the rear end of the cover assembly.

The needle frame assembly comprises a needle frame 50, a needle frame push rod 51, a biopsy needle 53 and a first spring 55, the needle frame assembly comprises a needle frame 60, a needle frame push rod 61, a shielding cover 62, a needle tube 63 and a second spring 65, the needle frame 60 and the needle frame 50 are arranged in a sleeve assembly consisting of a positioning left sleeve 20 and a positioning right sleeve 21 in a sliding manner, a needle frame sliding groove 22 and a needle frame sliding groove 23 are arranged on the side wall of the sleeve assembly, a needle frame stop 27 is arranged in a second sleeve part 213, the second sleeve part 213 is isolated into a needle frame moving bin 214 and a needle frame moving bin 215 by the needle frame stop 27, the needle frame sliding groove 22 is arranged on one side of the needle frame moving bin 214, and the needle frame sliding groove 23 is arranged on one side of the needle frame moving bin 215;

a push rod window 12 is arranged on one side of the upper cover 10, a shielding cover 62 is fixedly arranged at the front end of the sleeve component, the tail end of a needle tube 63 is fixedly connected with the front end of a needle tube rack 60, the front end of the needle tube 60 extends out of the shielding cover 62 and is matched with the shielding cover 62 in a sliding way, a needle tube rack buckle 66 is arranged at the tail end of the needle tube rack 60, a needle tube rack plunger 67 is convexly arranged on one side of the needle tube rack 60, a needle tube rack push rod 61 is arranged in the push rod window 12 in a sliding way, a needle tube rack slot 64 matched with the needle tube rack plunger 67 is arranged on the needle tube rack push rod 61, so that the needle tube rack plunger 67 passes through a needle tube rack chute 23 and then is matched with the needle tube rack slot 64 in a plugging way, the needle tube rack plunger 61 drives the needle tube rack 60 and the needle tube 63 to move when moving, a needle tube rack clamping groove 217 matched with the needle tube rack buckle 66 is arranged in the middle part of the needle tube rack stop 27, a second spring 65 is arranged between the needle tube rack stop 27 and the needle tube rack 60, so that the needle tube stop 66 moves to the needle tube rack clamping groove 217, the second spring 65 is compressed and the needle cannula 63 and needle holder 60 are loaded.

The tail end of a biopsy needle 53 is fixedly connected with the front end of a needle frame 50, the front end of the biopsy needle 53 extends into a needle tube 63 and is in sliding fit with the needle tube 63, a needle frame buckle 56 is arranged at the tail end of the needle frame 50, a needle frame inserting column 57 is convexly arranged on one side of the needle frame 50, a needle frame pushing rod 51 is arranged in a pushing rod window 12 in a sliding manner, a needle frame inserting groove 54 matched with the needle frame inserting column 57 is arranged on the needle frame pushing rod 51, the needle frame inserting column 57 penetrates through a needle frame sliding groove 22 and then is in inserting fit with the needle frame inserting groove 54, the needle frame pushing rod 51 drives the needle frame 50 and the biopsy needle 53 to move when moving, a needle frame clamping groove 216 matched with the needle frame buckle 56 is arranged in the middle of the needle frame stop block 25, a first spring 55 is arranged between the needle frame stop block 25 and the needle frame 50, the needle frame buckle 56 is arranged in the needle frame 216 when moving, and the first spring 55 is compressed, and the biopsy needle 53 and the needle frame 50 are loaded into the chamber.

The gear shifting assembly 70 comprises a conversion block 72, a conversion sliding block 74, a gear shifting button 71, a gear shifting spring 73, a sliding block spring 742 and a plug 75, wherein two front insertion blocks 721 are symmetrically arranged on two sides of the front end of the conversion block 72, two rear insertion blocks 722 are symmetrically arranged on two sides of the rear end of the conversion block 72, a rectangular gear shifting groove 221 is arranged on the outer wall of the positioning right sleeve 21, four gear shifting slots 222 matched with the front insertion blocks 721 and the rear insertion blocks 722 are arranged at four corners of the gear shifting groove 221, spring installation grooves 223 are arranged on two ends of the gear shifting groove 221 and used for limiting the gear shifting spring 73, and the gear shifting spring 73 is arranged between the conversion block 72 and the positioning right sleeve 21 during assembly.

The bottom end of the shift button 71 is provided with a button insert block 711 matched with the shift slot 222, the middle of the button insert block 711 is provided with an I-shaped button clamp groove 712, two side walls of the button clamp groove 712 are provided with button protrusions 713, the inner wall of the shift slot 222 is provided with a shift button clamp groove 18 matched with the button protrusions 713, the conversion block 72 is provided with an insert block I-shaped column 724 matched with the button clamp groove 712, so that the button insert block 711 of the shift button 71 penetrates through the shift slot 17 and then is in inserted fit with the insert block I-shaped column 724, the shift button 71 can conveniently press the conversion block 72, the button protrusions 713 are clamped into the shift button clamp groove 18 after the conversion block 72 axially translates to a required position, and the conversion block 72 is used for limiting the conversion block 72.

The top of the conversion sliding block 74 is provided with a sliding block I-shaped column 741, the bottom end of the rear insertion block 722 is provided with an I-shaped insertion block sliding groove 723, and the conversion sliding block 74 is in sliding fit with the insertion block sliding groove 723 of the rear insertion block 722 through the sliding block I-shaped column 741; a slider spring 742 is arranged in the insert block sliding groove 723 and used for driving the conversion slider 74 to extend out of the rear insert block 722, and the slider spring 742 is compressed when the needle frame 50 triggers the conversion slider 74 to move; the slider h-shaped post 741 is limited by the plug 75 after being inserted into the insert block sliding groove 723, so that the conversion slider 74 is prevented from being separated from the conversion block 72.

The front end of the needle rack 50 is also provided with a conical needle rack extrusion groove 52, so that when the needle rack 50 moves to abut against the needle rack stop block 27, the needle rack buckle 66 is extruded by the needle rack extrusion groove 52, the needle rack buckle 66 is separated from the needle rack clamping groove 217, and the needle rack 60 is triggered by the compressed second spring 66 after being separated from the constraint.

The sliding support 32 middle part of percussion connecting rod 30 sets up the conical connecting rod extrusion groove 38 with needle frame buckle 56 looks adaptation, it removes to drive percussion connecting rod 30 through percussion button 31, sliding support 32 removes in percussion storehouse 26 this moment, sliding support 32 removes to when with needle frame dog 25 butt, needle frame buckle 56 is extruded by connecting rod extrusion groove 38, needle frame buckle 56 breaks away from needle frame draw-in groove 216, needle frame 50 breaks away from the first spring 55 firing of compressed behind the constraint, realize that needle frame 50 removes, and realize the percussion to needle frame 60 by needle frame 50.

When the conversion block 72 is not pressed in the process of firing the needle holder 50 and the needle holder 50 by the firing connecting rod 30, the front insertion block 721 and the rear insertion block 722 of the conversion block 72 do not enter the sleeve assembly, and the strokes of the needle holder 60 and the needle holder 50 are not interfered; when the conversion block 72 is pressed by the shift button 71, the front insert 721 and the rear insert 722 of the conversion block 72 are pressed into the sleeve component, the needle holder 60 is arranged between the front insert 721 and the rear insert 722, the needle holder 50 is arranged at the rear side of the rear insert 722, the stroke of the firing link 30 for firing the needle holder 50 and the needle holder 50 is limited by the rear insert 722, the needle holder 50 drives the conversion slide 74 to move, a pressing groove is formed between the two conversion slides 74, the needle holder buckle 66 is pressed by the pressing groove during moving, the needle holder buckle 66 is separated from the needle holder clamping groove 217, the conversion slide 74 replaces the needle holder 50 for firing the needle holder 60, the stroke of the needle holder 60 is limited by the front insert 721, further, the gear adjustment of the moving stroke of the needle holder 50 and the needle holder 60 is realized, the specific stroke can be set to 10mm and 20mm, namely when the shift button 71 is not pressed, the moving stroke of the needle holder 50 and the needle 60 is 20mm, when the shift button 71 is fired, the moving stroke of the needle holder 50 and the needle holder 60 is 10mm, and the pitch and the position of the front insert 721, the rear insert 722, and the conversion slider 74 may be set according to the stroke.

It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.

Claims

1. A full-automatic biopsy needle with a gear shifting structure is characterized by comprising a needle frame assembly, a needle tube frame assembly, a cover body assembly, a sleeve assembly, a gear shifting assembly and a firing connecting rod; the sleeve subassembly is arranged in the lid subassembly, the setting of percussion connecting rod is so that the percussion connecting rod slides along sleeve subassembly axial between sleeve subassembly outer wall and lid subassembly inner wall, needle frame subassembly includes needle frame and biopsy needle, needle tube frame subassembly includes needle tube frame and needle tubing, needle frame, needle tube frame slide and set up in sleeve subassembly, sleeve subassembly setting is stretched out to the front end of needle tubing, the front end of biopsy needle is deep in the needle tube, the gear shift subassembly includes conversion piece, conversion slider, the front end both sides of conversion piece set up preceding inserted block respectively, the rear end both sides of conversion piece set up back inserted block respectively, sleeve subassembly's outer wall sets up the gear shift slot with preceding inserted block, back inserted block looks adaptation, sets up the gear shift spring between conversion piece and the sleeve subassembly, and the conversion piece is arranged in between sleeve subassembly outer wall and the lid subassembly inner wall, the preceding inserted block of conversion piece, The back inserted block is impressed sleeve subassembly back needle pipe support and is arranged in between preceding inserted block and the back inserted block, and the rear side of back inserted block is arranged in to the needle frame, the bottom of back inserted block sets up sliding fit's conversion slider, by percussion connecting rod percussion needle frame when the conversion piece is not pressed, by needle frame percussion needle pipe support, before the conversion piece is pressed in the inserted block, back inserted block stretched into sleeve subassembly, by percussion connecting rod percussion needle frame, the stroke of needle frame is spacing by the back inserted block, and needle frame drive conversion slider removes, by conversion slider percussion needle pipe support, the stroke of needle pipe support is spacing by preceding inserted block.

2. The full-automatic biopsy needle with the gear shifting structure according to claim 1, wherein the gear shifting assembly further comprises a gear shifting button, a button insert block is arranged at the bottom end of the gear shifting button, an I-shaped button slot is arranged in the middle of the button insert block, button protrusions are arranged on two sides of the button slot, a gear shifting slot suitable for the button insert block to pass through is arranged on the cover assembly, a gear shifting button slot matched with the button protrusions is arranged on the inner wall of the gear shifting slot, an I-shaped insert block column matched with the button slot is arranged on the conversion block, so that the button insert block of the gear shifting button penetrates through the gear shifting slot and is in insertion fit with the I-shaped insert block column, the gear shifting button presses the conversion block conveniently, and the button protrusions are clamped into the gear shifting button slot after the conversion block moves to a required position.

3. The biopsy needle with the shift structure according to claim 2, wherein an i-shaped slider column is disposed on a top of the conversion slider, an i-shaped insertion block sliding groove is disposed at a bottom end of the front insertion block, and the conversion slider is slidably engaged with the insertion block sliding groove of the front insertion block through the i-shaped slider column.

4. The biopsy needle with shift structure of claim 3, wherein a slider spring is disposed in the slide slot for driving the converting slider to extend out of the rear insert.

5. The fully automatic biopsy needle with the gear shifting structure according to claim 3 or 4, wherein the sleeve assembly comprises a left positioning sleeve and a right positioning sleeve which are in plug fit, link limiting blocks are symmetrically arranged on the outer wall of the left positioning sleeve, a link sliding groove is formed between the two link limiting blocks, and the front part of the firing link is in sliding fit with the link sliding groove.

6. The biopsy needle with the shift structure of claim 5, wherein the right positioning sleeve is provided with rectangular shift grooves, the shift slots are arranged at four corners of the shift grooves, two ends of the shift grooves are provided with spring mounting grooves, and ends of the shift springs are arranged in the spring mounting grooves.

7. The fully automatic biopsy needle with the gear shift structure according to claim 6, wherein the left positioning sleeve and the right positioning sleeve each comprise a first semicircular sleeve part and a second semicircular sleeve part, the first sleeve part forms a first cylinder after the left positioning sleeve and the right positioning sleeve are in plug fit, the second sleeve part forms a second cylinder, and the diameter of the first cylinder is larger than that of the second cylinder.

8. The full-automatic biopsy needle with the gear shifting structure according to claim 7, further comprising a firing button, wherein the firing link comprises a link body, a firing button clamping groove is formed in the front end of the link body, a button clamping column is arranged on the firing button, a firing window is arranged on the cover body assembly, and the button clamping column penetrates through the firing window and then is clamped into the firing button clamping groove, so that the firing button outside the cover body assembly drives the firing link to move when moving.

9. The biopsy needle with the shift structure according to claim 8, wherein the tail end of the connecting rod body is disposed in an L shape, the tail end of the connecting rod body is disposed with a sliding bracket, and the first sleeve portion is disposed with a connecting rod slot adapted to pass through a firing connecting rod, so that the connecting rod body is disposed outside the sleeve assembly after passing through the connecting rod slot.

10. The fully automatic biopsy needle with the gear shift structure according to claim 9, wherein a needle frame stop and a connecting rod stop are arranged in the first sleeve portion, a firing chamber is formed between the needle frame stop and the connecting rod stop after the left positioning sleeve and the right positioning sleeve are in plug fit, and the sliding support is arranged in the firing chamber.