CN217525203U - Full-automatic biopsy needle - Google Patents

Abstract

The utility model relates to a full-automatic biopsy needle, which comprises a needle frame component, a needle tube frame component, a cover component, a sleeve component, a gear shifting component, a firing connecting rod and a safety rod; a movable safety rod is arranged on the firing connecting rod; the gear shift subassembly includes the conversion piece, the 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 the back inserted block respectively, sleeve component's outer wall setting and preceding inserted block, the gear shift slot of back inserted block looks adaptation, set up the gear shift spring between conversion piece and the sleeve component, the conversion piece is arranged in between sleeve component outer wall and the lid subassembly inner wall, the preceding inserted block of conversion piece, back inserted block impresses sleeve component back needle pipe support and arranges in between preceding inserted block and the back inserted block, 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.

Description

Full-automatic biopsy needle

Technical Field

The utility model relates to a medical detection apparatus technical field, especially a full-automatic biopsy needle.

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 adopted 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 made into an inclined plane 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, in the prior art, a patent document with an authorization publication number of CN209048193U describes a percutaneous puncture biopsy needle which comprises a needle tube and a needle core and also comprises a handle operation end, the handle operation end comprises an outer shell, an inner sleeve, an error prevention button, a rear firing button, a left button and a right button, wherein the error prevention button acts on a needle core frame (see the attached figure 5 of the specification), and the error prevention button of the structure has a complex structure and is inconvenient to operate; moreover, because the suspected tumor size of the biopsy is usually different due to different biopsy sampling positions of the patients, such as tissues of prostate, kidney, liver, spleen, breast, etc., the operation needs a biopsy needle with a suitable ejection stroke and a suitable biopsy sampling length.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a full-automatic biopsy needle of simple structure, easily control.

In order to solve the technical problem, the utility model provides a full-automatic biopsy needle, which comprises a needle frame component, a needle tube frame component, a cover component, a sleeve component, a gear shifting component, a firing connecting rod and a safety rod; the sleeve assembly is arranged in the cover body assembly, the firing connecting rod is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing connecting rod can slide along the axial direction of the sleeve assembly, the needle frame assembly comprises a needle frame and a biopsy needle, the needle frame assembly comprises a needle tube frame and a needle tube, the needle frame and the needle tube frame are arranged in the sleeve assembly in a sliding mode, the front end of the needle tube extends out of the sleeve assembly, the front end of the biopsy needle extends into the needle tube, the tail end of the firing connecting rod is provided with a safety rod inserting groove, the rear end of the safety rod inserting groove is provided with a safety stop, the tail end of the cover body assembly is provided with a safety inserting groove matched with the safety rod so that the safety rod can slide along the radial direction of the cover body assembly, the middle of the safety rod is provided with a stroke groove, the safety stop is abutted against the safety rod during locking, the safety stop is pushed during unlocking so that the stroke groove is matched with the safety stop, and the firing connecting rod moves along the stroke Cheng Aocao to achieve firing; the gear shift subassembly is including 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 component's outer wall setting and the gear shift slot of preceding inserted block, back inserted block looks adaptation set up the gear shift spring between conversion piece and the sleeve component, conversion piece is arranged in between sleeve component outer wall and the lid body subassembly inner wall, the preceding inserted block of conversion piece, back inserted block impress sleeve component back needle pipe frame arrange in between preceding inserted block and the back inserted block, 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 connecting rod percussion needle frame when conversion piece is not pressed, by needle frame percussion needle pipe support, before the conversion piece is pressed, in the back inserted block stretches into sleeve component, by 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 frame, the stroke of conversion piece, the pipe support is spacing by preceding inserted block, the pipe support, realizes that the needle frame removes the regulation stroke of needle frame, needle frame.

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.

Furthermore, sliding tables are arranged on two sides of the stroke groove, the sliding tables are lower than two ends of the safety rod and higher than the stroke groove, so that the safety stop block is abutted to the sliding tables when the trigger connecting rod is locked, and the stroke groove is arranged at the safety stop block after the safety rod moves.

Furthermore, the inner sides of the two ends of the safety rod are respectively provided with a limiting barrier strip, and the limiting barrier strips are arranged between the safety slots on the two sides of the cover body assembly during assembly, so that the limiting barrier strips are blocked and limited by the inner wall of the cover body assembly when the safety rod moves, and the safety rod is prevented from being separated from the safety slots.

Further, full-automatic biopsy needle 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 group spare, button card post passes behind the trigger window card and goes into the trigger button draw-in groove to the trigger button outside making the lid body group spare drives the trigger connecting rod and removes when moving.

A method for using a full-automatic biopsy needle comprises the following steps that firstly, a needle tube frame and a needle frame are loaded, then a safety rod is pushed to enable a travel groove to be aligned to a safety stop block of a trigger connecting rod, when a gear shifting assembly is in an initial state, a gear shifting spring supports a conversion block, a front insertion block and a rear insertion block do not enter a sleeve assembly, a trigger button drives the trigger connecting rod to move, the needle frame is driven by the trigger connecting rod to be separated from a limit position, the needle frame and the biopsy needle are triggered, the needle tube frame is triggered by the needle frame to be separated from the limit position, and the needle tube frame and the needle tube are triggered; when the stroke is shifted, a shift button is pressed down to enable a front insert block and a rear insert block to enter a sleeve assembly, a rear needle tube frame is arranged between the front insert block and the rear insert block, a needle frame is arranged on the rear side of the rear insert block, then the shift button is translated to enable a button bulge to be clamped into a shift button clamping groove, the shift block is limited, and a slider spring supports a shift slider to enable the shift slider to be arranged in a protruding mode; then drive the percussion connecting rod through the percussion button and remove, break away from spacingly by percussion connecting rod drive needle frame, realize the percussion of needle frame and biopsy needle, the stroke of needle frame is spacing by back inserted block to by the removal of needle frame drive conversion slider, form the extrusion groove between two conversion sliders, the percussion needle pipe frame breaks away from spacingly, the stroke of needle pipe frame is spacing by preceding inserted block, and then realizes the gear regulation of needle frame, needle pipe frame travel stroke.

The technical effects of the utility model are that: (1) Compared with the prior art, the full-automatic biopsy needle has the advantages that the stroke of the needle tube frame and the needle frame is limited by the front insert block and the rear insert block of the conversion block when the conversion block is started through the conversion block which can be pressed, the stroke of the needle tube frame and the needle frame is not freely limited when the conversion block is not started, and two-gear stroke adjustment is realized 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 arrangement of the gear shifting spring elastically supports the conversion block, so that the conversion block can be pressed conveniently; (5) The switching slide block is supported by the slide block spring when the switching slide block is not triggered, so that the switching slide block protrudes out of the switching block, and the slide block spring is compressed when the switching slide block is triggered; (6) The safety rod is arranged at the tail end of the firing connecting rod along the radial direction, so that the firing connecting rod cannot move when the safety rod is locked, and the safety locking function is realized; the safety rod directly limits the stroke of the firing connecting rod, so that the needle rack and the needle rack are limited simultaneously, and the safety is higher.

Drawings

The invention will be described in further detail with reference to the accompanying drawings:

FIG. 1 is a perspective view of a fully automatic biopsy needle;

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 a partially enlarged schematic view of the area A in FIG. 3;

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

FIG. 6 is an exploded schematic 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 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;

FIG. 16 is a perspective view of the bumper beam;

in the figure:

an upper cover 10, a lower cover 11, a push rod window 12, a trigger window 13, a rectangular groove 14, a safety slot 15, 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 trigger link 30, a trigger button 31, a sliding bracket 32, a limit bracket 33, a rear sealing cover 34, a trigger button clamping groove 35, a safety rod inserting groove 36, a safety stop 37, a link extrusion groove 38, a link body 39, a button clamping column 311,

a safety lever 40, a travel groove 41, a limit stop 42, a sliding table 43,

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 16, the fully automatic biopsy needle of the present embodiment comprises a cover body assembly, a sleeve assembly, a firing link 30, a firing button 31, a gear shifting assembly 70, a safety lever 40, 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 semi-cylindrical and matched in an inserted manner, rectangular grooves 14 are symmetrically formed in the front parts 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, and second rectangular grooves are symmetrically formed in the tail parts of the upper cover 10 and the lower cover 11, so that after the upper cover 10 and the lower cover 11 are inserted, two rectangular grooves 14 form a triggering window 13, and two gear shifting grooves form a gear shifting slot 17; two second rectangular slots form the relief slots 15.

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 tail end of the firing connecting rod 30 is provided with a safety rod inserting groove 36, the rear end of the safety rod inserting groove 36 is provided with a safety stop block 37, the safety rod 40 is matched with the safety inserting groove 15 at the tail end of the cover body assembly, so that the safety rod 40 can slide along the radial direction of the cover body assembly, the middle part of the safety rod 40 is provided with a stroke groove 41, the safety stop block 37 is abutted against the safety rod 40 during locking, the safety rod 40 is pushed during unlocking to enable the stroke groove 41 to be matched with the safety stop block 37, and the firing connecting rod 30 moves Cheng Aocao along the row to achieve firing.

The two sides of the front end of the bumper bar slot 36 are provided with limiting brackets 33, the limiting brackets 33 are arranged between the bumper bar slot 36 and the sliding bracket 32, and the limiting brackets 33 are arranged outside the connecting rod stop 28 during assembly.

The rear end of the safety stop 37 is provided with a rear closure 34 for closing the rear end of the cover assembly.

Sliding tables 43 are arranged on two sides of the stroke groove 41, the sliding tables 43 are lower than two ends of the safety rod 40 and higher than the stroke groove 41, the safety rod 40 can slide conveniently, so that the safety stop 37 is abutted against the sliding tables 43 when the firing connecting rod 30 is locked, and the stroke groove 41 is arranged at the safety stop 37 after the safety rod 40 moves.

The inner sides of the two ends of the safety rod 40 are respectively provided with a limiting barrier strip 42, and the limiting barrier strips 42 are arranged between the safety slots 15 on the two sides of the cover body assembly during assembly, so that the limiting barrier strips 42 are blocked and limited by the inner wall of the cover body assembly when the safety rod 40 moves, and the safety rod 40 is prevented from being separated from the safety slots 15.

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 stopper 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 stopper 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;

one side of upper cover 10 sets up push rod window 12, the fixed front end that sets up at the sleeve subassembly of shielding lid 62, the tail end of needle tubing 63 is fixed continuous with the front end of needle tubing support 60, the front end of needle tubing 60 stretches out shielding lid 62 and sets up and with shielding lid 62 sliding fit, the tail end of needle tubing support 60 sets up needle tubing support buckle 66, one side protrusion of needle tubing support 60 sets up needle tubing support jack 67, needle tubing support push rod 61 slides and sets up in push rod window 12, set up the needle tubing support slot 64 with needle tubing support jack 67 looks adaptation on the needle tubing support push rod 61, so that needle tubing support jack 67 passes behind needle tubing support spout 23 with needle tubing support slot 64 grafting cooperation, drive needle tubing support 60 and needle tubing 63 when needle tubing support push rod 61 removes, the middle part setting of needle tubing support dog 27 and the needle tubing support buckle 66 looks adaptation's needle tubing support slot 217, second spring 65 is arranged in between needle tubing support dog 27 and needle tubing support dog 60, so that needle tubing support 60 removes to needle tubing support buckle 66 and arranges in needle tubing slot 217, second spring 65 is compressed, realize needle tubing 63 and needle tubing support 60 are loaded in.

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 inserting block 722 is provided with an I-shaped inserting block sliding groove 723, and the conversion sliding block 74 is in sliding fit with the inserting block sliding groove 723 of the rear inserting 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 h-shaped slider 741 is inserted into the insert block sliding groove 723 and then limited by the plug 75, 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 switching block 72 is pressed by the gear shifting button 71, the front insert block 721 and the rear insert block 722 of the switching block 72 are pressed into the sleeve assembly, the needle holder 60 is arranged between the front insert block 721 and the rear insert block 722, the needle holder 50 is arranged at the rear side of the rear insert block 722, the stroke of the needle holder 50 triggered by the triggering connecting rod 30 is limited by the rear insert block 722, the needle holder 50 drives the switching slider 74 to move, a pressing groove is formed between the two switching sliders 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 switching slider 74 replaces the needle holder 50 to trigger the needle holder 60, the stroke of the needle holder 60 is limited by the front insert block 721, further 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 gear shifting button 71 is not triggered, the moving stroke of the needle holder 50 and the needle holder 60 is set to be 10mm, and the distance between the front insert block 74 and the rear insert block 721 can be set according to the shifting stroke of the gear shifting button 722.

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. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the spirit of the invention.

Claims (7)

1. A full-automatic biopsy needle comprises a needle frame assembly, a needle tube frame assembly, a cover body assembly, a sleeve assembly and a firing connecting rod; the sleeve component is arranged in the cover component, the triggering connecting rod is arranged between the outer wall of the sleeve component and the inner wall of the cover component so as to enable the triggering connecting rod to slide along the axial direction of the sleeve component, the needle frame component comprises a needle frame and a biopsy needle, the needle frame component comprises a needle tube frame and a needle tube, the needle frame and the needle tube frame are arranged in the sleeve component in a sliding manner, the front end of the needle tube extends out of the sleeve component, the front end of the biopsy needle extends into the needle tube,

the safety lock is characterized by further comprising a gear shifting assembly and a safety rod, wherein a safety rod slot is formed in the tail end of the trigger connecting rod, a safety stop block is arranged at the rear end of the safety rod slot, a safety slot matched with the safety rod is formed in the tail end of the cover body assembly so that the safety rod can slide along the radial direction of the cover body assembly, a stroke groove is formed in the middle of the safety rod, the safety stop block is abutted against the safety rod during locking, the safety rod is pushed to enable the stroke groove to be matched with the safety stop block during unlocking, and the trigger connecting rod moves along the row Cheng Aocao to realize trigger;

the gear shifting assembly comprises a conversion block and a conversion sliding block, wherein the two sides of the front end of the conversion block are respectively provided with a front insertion block, the two sides of the rear end of the conversion block are respectively provided with a rear insertion block, the outer wall of the sleeve assembly is provided with a gear shifting slot matched with the front insertion block and the rear insertion block, 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 assembly, the front insertion block and the rear insertion block of the conversion block are pressed into the sleeve assembly, the needle frame is arranged at the rear side of the rear insertion block, the bottom of the rear insertion block is provided with the conversion sliding block which is in sliding fit, the conversion block is triggered by a connecting rod when not pressed, the needle frame is triggered by the needle frame, the conversion block is stretched into the sleeve assembly when pressed, the front insertion block and the rear insertion block are stretched into the sleeve assembly, the stroke of the needle frame is limited by the rear insertion block by the connecting rod, and the needle frame is driven to move, the conversion sliding block is triggered by the conversion sliding block, the needle frame is triggered by the front insertion block, the needle frame, the stroke of the conversion block, the needle frame is limited by the front insertion block, the stroke of the needle frame, and the stroke of the needle frame is moved by the adjustment sliding block, the needle frame.

2. The fully automatic biopsy needle according to claim 1, wherein the gear shift assembly further comprises a gear shift button, a button insert block is arranged at the bottom end of the gear shift 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 shift slot suitable for the button insert block to pass through is arranged on the cover assembly, a gear shift button slot matched with the button protrusions is arranged on the inner wall of the gear shift 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 shift button passes through the gear shift slot and then is in plug-in fit with the i-shaped insert block column, the gear shift button can be conveniently pressed on the conversion block, and the button protrusions are clamped into the gear shift button slot after the conversion block moves to a required position.

3. The automatic biopsy needle 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 in sliding fit with the insertion block sliding groove of the front insertion block through the i-shaped slider column.

4. The fully automated biopsy needle of claim 3, wherein a slider spring is disposed within the plunger slot for driving the translating slider to extend out of the rear plunger.

5. The fully automatic biopsy needle according to claim 3 or 4, wherein sliding tables are arranged on two sides of the stroke groove, and the sliding tables are lower than two ends of the safety rod and higher than the stroke groove, so that the safety stop abuts against the sliding tables when the trigger connecting rod is locked, and the stroke groove is arranged at the safety stop after the safety rod moves.

6. The biopsy needle of claim 5, wherein the safety lever has two ends and inner sides respectively provided with a position-limiting bar, the position-limiting bar is disposed between the safety slots on the two sides of the cover assembly when assembled, so that the safety lever is moved to block and limit the position-limiting bar by the inner wall of the cover assembly.

7. The full-automatic biopsy needle according to claim 6, further comprising a firing button, wherein the firing link comprises a link body, a firing button slot is arranged at 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 passes through the firing window and then is clamped into the firing button slot, so that the firing button outside the cover body assembly drives the firing link to move when moving.

Images