A fully automatic biopsy needle and its use method

Abstract

The present invention relates to a fully automatic biopsy needle and a method for using the same. The fully automatic biopsy needle comprises a needle holder assembly, a needle tube holder assembly, a cover body assembly, a sleeve assembly, a shift assembly, a firing connecting rod and a safety lever; a movable safety lever is arranged on the firing connecting rod; the shift assembly comprises a conversion block and a conversion slider; front plug-in blocks are arranged on both sides of the front end of the conversion block, and rear plug-in blocks are arranged on both sides of the rear end of the conversion block; a shift slot matched with the front plug-in block and the rear plug-in block is arranged on the outer wall of the sleeve assembly; a shift 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; after the front plug-in block and the rear plug-in block of the conversion block are pressed into the sleeve assembly, the needle tube holder is arranged between the front plug-in block and the rear plug-in block; the needle holder is arranged on the rear side of the rear plug-in block; a slidingly matched conversion slider is arranged at the bottom of the rear plug-in block.

Description

Technical Field

[0001] The present invention relates to the technical field of medical detection instruments and equipment, in particular to a fully automatic biopsy needle and a method for using the same. Background Art

[0002] A biopsy needle is a medical device that is suitable for use in multiple organs such as the kidneys, liver, lungs, breasts, thyroid glands, prostate glands, pancreas, testicles, uterus, ovaries, and body surface. It can be used for sampling living tissue and aspirating cells from vertebral tumors and tumors of unknown types.

[0003] Clinically, when examining a cancer patient, in order to determine the nature of the tumor, it is necessary to use a biopsy needle to take some living tissue from the diseased area. In the past, the traditional method of human tissue biopsy was surgical incision, in which the tissue was removed for biopsy. This method has the disadvantages of large trauma, high cost, and great pain for the patient. In recent years, tissue biopsy mainly uses a biopsy needle, which is composed of a needle body, a needle seat, and a needle core. The needle core is inserted into the needle body from the needle seat. The end of the needle core has a needle groove, and the end of the needle body is made into a bevel, forming a blade-like incision. When this biopsy needle is used to remove tissue, the trauma surface is small and the biopsy success rate is high. In the prior art, the patent document with the authorization announcement number CN209048193U records a percutaneous puncture biopsy needle, including a needle tube and a needle core, and also includes a handle operating end. The handle operating end includes an outer shell, an inner sleeve, an anti-misfire button, a rear firing button, a left button, and a right button. The anti-misfire button acts on the needle core frame (see the attached manual). Figure 5 ), the anti-error button of the above structure is complex and inconvenient to operate; and because the parts of the patient that need biopsy sampling are different, such as prostate, kidney, liver, spleen, breast and other tissues, the sizes of suspected tumors that need puncture biopsy are usually different. Therefore, a biopsy needle with a suitable ejection stroke and puncture sampling length is required for the operation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a fully automatic biopsy needle with a simple structure and easy operation and a method for using the same.

[0005] In order to solve the above technical problems, the fully automatic biopsy needle provided by the present invention comprises a needle holder assembly, a needle tube holder assembly, a cover body assembly, a sleeve assembly, a shift assembly, a firing link and a safety lever; the sleeve assembly is placed in the cover body assembly, the firing link is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing link slides axially along the sleeve assembly, the needle holder assembly comprises a needle holder and a biopsy needle, the needle tube holder assembly comprises a needle tube holder and a needle tube, the needle holder and the needle tube holder are slidably arranged in the sleeve assembly, the front end of the needle tube extends out of the sleeve assembly, the front end of the biopsy needle penetrates into the needle tube, a safety lever slot is arranged at the tail end of the firing link, a safety block is arranged at the rear end of the safety lever slot, a safety slot matched with the safety lever is arranged at the tail end of the cover body assembly so that the safety lever slides radially along the cover body assembly, a travel groove is arranged in the middle part of the safety lever, when locked, the safety block abuts against the safety lever, when unlocked, the safety lever is pushed so that the travel groove cooperates with the safety block, and the firing link moves along the travel groove. The shifting assembly includes a conversion block and a conversion slider, front plug-in blocks are respectively arranged on both sides of the front end of the conversion block, and rear plug-in blocks are respectively arranged on both sides of the rear end of the conversion block, and a shifting slot adapted to the front plug-in block and the rear plug-in block is arranged on the outer wall of the sleeve assembly, a 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, and the front plug-in block and the rear plug-in block of the conversion block are pressed into the sleeve assembly, and the needle tube rack is arranged between the front plug-in block and the rear plug-in block. The needle holder is placed on the rear side of the rear insert block, and a slidably matched conversion slider is provided at the bottom of the rear insert block. When the conversion block is not pressed, the firing connecting rod fires the needle holder, and the needle holder fires the needle tube holder. When the conversion block is pressed, the front insert block and the rear insert block extend into the sleeve assembly, and the firing connecting rod fires the needle holder, and the travel of the needle holder is limited by the rear insert block, and the needle holder drives the conversion slider to move, and the conversion slider fires the needle tube holder, and the travel of the needle tube holder is limited by the front insert block, thereby realizing the gear adjustment of the moving travel of the needle holder and the needle tube holder.

[0006] Furthermore, the shift assembly also includes a shift button, a button plug-in block is arranged at the bottom end of the shift button, an I-shaped button slot is arranged in the middle of the button plug-in block, button protrusions are arranged on both sides of the button slot, a shift slot suitable for the button plug-in block to pass through is arranged on the cover body assembly, a shift button slot matching the button protrusion is arranged on the inner wall of the shift slot, and an I-shaped column of the plug-in block matching the button slot is arranged on the conversion block, so that the button plug-in block of the shift button can be plugged and matched with the I-shaped column of the plug-in block after passing through the shift slot, so as to facilitate the shift button to press the conversion block, and after the conversion block moves to the desired position, the button protrusion is inserted into the shift button slot to limit the conversion block.

[0007] Furthermore, a slider I-shaped column is arranged on the top of the conversion slider, an I-shaped block slide groove is arranged on the bottom end of the front plug block, and the conversion slider is slidably matched with the block slide groove of the front plug block via the slider I-shaped column.

[0008] Furthermore, a slider spring is arranged in the insert block slide groove, which is used to drive the conversion slider to extend out of the rear insert block, and the slider spring is compressed when the needle holder triggers the conversion slider to move.

[0009] Furthermore, slides are arranged on both sides of the travel groove, and the slides are lower than the two ends of the safety rod and higher than the travel groove, so that the safety block abuts against the slide when the firing rod is locked, and the travel groove is placed at the safety block after the safety rod moves.

[0010] Furthermore, limit stop bars are respectively arranged on the inner sides of both ends of the safety rod, and when assembled, the limit stop bars are placed between the safety slots on both sides of the cover assembly, so that when the safety rod moves, the limit stop bars are blocked and limited by the inner wall of the cover assembly to prevent the safety rod from leaving the safety slot.

[0011] Furthermore, the fully automatic biopsy needle also includes a firing button, the firing rod includes a connecting rod body, a firing button slot is arranged at the front end of the connecting rod body, a button clamping column is arranged on the firing button, and a firing window is arranged on the cover body assembly. The button clamping column passes through the firing window and then is clamped into the firing button slot, so that when the firing button outside the cover body assembly moves, the firing rod is driven to move.

[0012] A method for using a fully automatic biopsy needle comprises the following steps: firstly, the needle tube holder and the needle holder are loaded, and then the safety lever is pushed so that the travel groove is aligned with the safety block of the firing connecting rod; when the shift assembly is in the initial state, the shift spring supports the conversion block, and the front insert block and the rear insert block have not entered the sleeve assembly; the firing connecting rod is driven to move by the firing button, and the needle holder is driven to disengage from the limit position by the firing connecting rod, so that the needle holder and the biopsy needle are fired, and the needle holder fires the needle tube holder to disengage from the limit position, so that the needle tube holder and the needle tube are fired; when the travel gear is shifted, the shift button is pressed so that the front insert block and the rear insert block enter the sleeve assembly, and at this time, the rear needle tube holder is placed in the front insert block. The needle holder is placed between the block and the rear insertion block, and the needle holder is placed on the rear side of the rear insertion block. The shift button is then translated so that the button protrusion is inserted into the shift button slot to limit the conversion block. The conversion slider is supported by the slider spring so that the conversion slider is protruded. The firing button is then used to drive the firing connecting rod to move, and the firing connecting rod drives the needle holder to disengage from the limit to achieve the firing of the needle holder and the biopsy needle. The stroke of the needle holder is limited by the rear insertion block, and the conversion slider is driven by the needle holder to move. An extrusion groove is formed between the two conversion sliders, and the firing needle tube holder is disengaged from the limit. The stroke of the needle tube holder is limited by the front insertion block, thereby realizing the gear adjustment of the needle holder and the needle tube holder's moving stroke.

[0013] The technical effects of the invention are as follows: (1) The fully automatic biopsy needle of the present invention is different from the prior art in that, by setting a pressable conversion block, the front plug-in block and the rear plug-in block of the conversion block limit the travel of the needle holder and the needle rack when the conversion block is started, and the travel of the needle holder and the needle rack is free and unrestricted when the conversion block is not started, thereby realizing two-speed travel adjustment to meet different usage requirements; (2) The setting of the conversion slider enables the needle holder to indirectly drive the needle rack through the conversion slider when the travel is restricted; (3) By setting a shift button slot and a button protrusion, when the shift button moves to the button protrusion and engages with the shift button, When the button is engaged, the conversion block is limited; (4) the shift spring is set to elastically support the conversion block, which is convenient for pressing it; (5) the slider spring is set, when the conversion slider is not fired, the slider spring supports the conversion slider, so that the conversion slider protrudes from the conversion block setting, and the slider spring is compressed when the conversion slider is fired; (6) by setting a safety rod radially at the tail end of the firing link, the firing link cannot move when the safety rod is locked, thereby realizing the safety locking function; the safety rod directly limits the stroke of the firing link, so that the needle holder and the syringe holder are limited at the same time, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the fully automatic biopsy needle;

[0016] Figure 2 It is a schematic diagram of the exploded structure after the cover assembly and the sleeve assembly are separated;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the upper cover;

[0018] Figure 4 yes Figure 3 A partial enlarged schematic diagram of the middle A area;

[0019] Figure 5 is a three-dimensional structural schematic diagram of a gear shift assembly;

[0020] Figure 6 It is a schematic diagram of the exploded structure of the gear shift assembly;

[0021] Figure 7 It is a three-dimensional structural diagram of a shift button;

[0022] Figure 8 It is a schematic diagram of the decomposition structure of the conversion slider;

[0023] Fig. 9 1 is a three-dimensional structural schematic diagram of the sleeve assembly;

[0024] Fig.10 It is a schematic diagram of the three-dimensional structure of the positioning right sleeve;

[0025] Fig.11 It is a three-dimensional structural schematic diagram of the positioning left sleeve;

[0026] Fig.12 It is a structural schematic diagram of positioning the right sleeve at another angle;

[0027] Fig.13 It is a three-dimensional structural schematic diagram of the firing rod;

[0028] Fig.14 is a schematic diagram of the exploded structure of the biopsy needle assembly;

[0029] Fig.15 is a schematic diagram of the exploded structure of a biopsy needle assembly;

[0030] Fig.16 It is a three-dimensional structural schematic diagram of the bumper;

[0031] In the figure:

[0032] Upper cover 10, lower cover 11, push rod window 12, firing window 13, rectangular slot 14, insurance slot 15, sleeve limit slot 16, shift slot 17, shift button slot 18,

[0033] Positioning left sleeve 20, positioning right sleeve 21, needle holder slide 22, needle tube holder slide 23, connecting rod limit block 24, needle holder block 25, firing chamber 26, needle tube holder block 27, connecting rod block 28, first sleeve portion 210, limit column 211, connecting rod slot 212, second sleeve portion 213, needle holder moving chamber 214, needle tube holder moving chamber 215, needle holder card slot 216, needle tube holder card slot 217, shift slot 221, shift slot 222, spring mounting slot 223,

[0034] Firing rod 30, firing button 31, sliding bracket 32, limiting bracket 33, rear cover 34, firing button slot 35, safety rod slot 36, safety block 37, connecting rod extrusion slot 38, connecting rod body 39, button clamp column 311,

[0035] Safety rod 40, travel groove 41, limit stop bar 42, slide 43,

[0036] Needle holder 50, needle holder push rod 51, needle holder extrusion groove 52, biopsy needle 53, needle holder slot 54, first spring 55, needle holder buckle 56, needle holder plug post 57,

[0037] The needle tube rack 60, the needle tube rack push rod 61, the shielding cover 62, the needle tube 63, the needle tube rack slot 64, the second spring 65, the needle tube rack buckle 66, the needle tube rack plug column 67,

[0038] Shift assembly 70, shift button 71, button insert block 711, button slot 712, button protrusion 713, conversion block 72, front insert block 721, rear insert block 722, insert block slot 723, insert block I-beam column 724, shift spring 73, conversion slider 74, slider I-beam column 741, slider spring 742, plug 75. DETAILED DESCRIPTION

[0039] Example 1

[0040] like Figures 1 to 16 As shown, the fully automatic biopsy needle of this embodiment includes a cover body assembly, a sleeve assembly, a firing rod 30, a firing button 31, a shift assembly 70, a safety lever 40, a needle holder assembly and a needle tube holder assembly; the cover body assembly includes a semi-cylindrical upper cover 10 and a lower cover 11 that are plugged together, rectangular grooves 14 are symmetrically arranged at the front of the upper cover 10 and the lower cover 11, rectangular shift grooves are symmetrically arranged on the upper cover and the lower cover, and second rectangular grooves are symmetrically arranged at the rear of the upper cover 10 and the lower cover 11, so that after the upper cover 10 and the lower cover 11 are plugged together, the two rectangular grooves 14 form a firing window 13, and the two shift grooves form a shift slot 17; the two second rectangular grooves form a safety slot 15.

[0041] The sleeve assembly is placed in the cover body assembly, and the sleeve assembly includes a plug-in positioning left sleeve 20 and a right sleeve 21. The positioning left sleeve 20 and the positioning right sleeve 21 both include a semicircular first sleeve portion 210 and a second sleeve portion 213. After the positioning left sleeve 20 and the positioning right sleeve 21 are plug-in-fitted, the first sleeve portion 210 forms a first cylinder, and the second sleeve portion 213 forms a second cylinder. The diameter of the first cylinder is greater than that of the second cylinder.

[0042] A sleeve limiting groove 16 is also provided in the upper cover 10 and the lower cover 11. A limiting column 211 which is plugged into and cooperates with the sleeve limiting groove 16 is provided on the outer wall of the first sleeve portion 210. During assembly, the limiting column 211 is placed in the sleeve limiting groove 16 for circumferential positioning of the sleeve assembly.

[0043] The firing link 30 is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing link 30 can slide axially along the sleeve assembly. The firing link 30 includes a connecting rod body 39. A firing button slot 35 is arranged at the front end of the connecting rod body 39. A button clamping column 311 is arranged on the firing button 31. The button clamping column 311 passes through the firing window 13 and is inserted into the firing button slot 35, so that when the firing button 31 outside the cover body assembly moves, the firing link 30 is driven to move.

[0044] The tail end of the connecting rod body 39 is L-shaped, and a sliding bracket 32 ​​is set at the tail end of the connecting rod body 39. A connecting rod slot 212 suitable for the connecting rod body 39 of the firing connecting rod 30 to pass through is set on the first sleeve part 210, so that the connecting rod body 39 passes through the connecting rod slot 212 and is placed outside the second sleeve part 213.

[0045] A needle holder block 25 and a connecting rod block 28 are disposed in the first sleeve portion 210. After the left sleeve 20 and the right sleeve 21 are positioned and plugged in, a firing chamber 26 is formed between the needle holder block 25 and the connecting rod block 28. The sliding bracket 32 ​​is placed in the firing chamber 26, and the connecting rod slot 212 is placed on the side wall of the firing chamber 26.

[0046] The outer wall of the left positioning sleeve 20 is symmetrically provided with connecting rod limit blocks 24 , and a connecting rod sliding groove is formed between the two connecting rod limit blocks 24 . The front part of the firing connecting rod 30 is slidably matched with the connecting rod sliding groove, and the firing connecting rod 30 is guided by the connecting rod limit blocks 24 .

[0047] A safety rod slot 36 is provided at the tail end of the firing link 30, and a safety block 37 is provided at the rear end of the safety rod slot 36. The safety rod 40 is adapted to the safety slot 15 at the tail end of the cover body assembly so that the safety rod 40 can slide radially along the cover body assembly. A travel groove 41 is provided in the middle of the safety rod 40. When locked, the safety block 37 abuts against the safety rod 40. When unlocked, the safety rod 40 is pushed so that the travel groove 41 cooperates with the safety block 37, and the firing link 30 moves along the travel groove 41 to realize firing.

[0048] Limiting brackets 33 are arranged on both sides of the front end of the bumper slot 36 , and the limiting brackets 33 are placed between the bumper slot 36 and the sliding bracket 32 ​​. When assembled, the limiting brackets 33 are placed outside the connecting rod stopper 28 .

[0049] A rear cover 34 is provided at the rear end of the safety stopper 37 for closing the rear end of the cover assembly.

[0050] Slides 43 are set on both sides of the travel groove 41. The slides 43 are lower than the two ends of the safety rod 40 and higher than the travel groove 41, which is convenient for the safety rod 40 to slide so that the safety block 37 abuts against the slide 43 when the firing link 30 is locked. After the safety rod 40 moves, the travel groove 41 is placed at the safety block 37.

[0051] Limiting bars 42 are respectively arranged on the inner sides of both ends of the safety rod 40. When assembled, the limiting bars 42 are placed between the safety slots 15 on both sides of the cover assembly so that when the safety rod 40 moves, the limiting bars 42 are blocked and limited by the inner wall of the cover assembly to prevent the safety rod 40 from escaping from the safety slots 15.

[0052] The needle holder assembly includes a needle holder 50, a needle holder push rod 51, a biopsy needle 53, and a first spring 55. The needle tube holder assembly includes a needle tube holder 60, a needle tube holder push rod 61, a shielding cover 62, a needle tube 63, and a second spring 65. The needle tube holder 60 and the needle holder 50 are slidably arranged in a sleeve assembly composed of a positioning left sleeve 20 and a positioning right sleeve 21, and a needle holder slide groove 22 and a needle tube holder slide groove 23 are arranged on the side wall of the sleeve assembly. A needle tube holder stopper 27 is arranged in the second sleeve portion 213, and the needle tube holder stopper 27 isolates the second sleeve portion 213 into a needle holder moving bin 214 and a needle tube holder moving bin 215. The needle holder slide groove 22 is arranged on one side of the needle holder moving bin 214, and the needle tube holder slide groove 23 is arranged on one side of the needle tube holder moving bin 215.

[0053] A push rod window 12 is provided on one side of the upper cover 10, a shielding cover 62 is fixedly provided at the front end of the sleeve assembly, the tail end of the needle tube 63 is fixedly connected to the front end of the needle tube stand 60, the front end of the needle tube 60 extends out of the shielding cover 62 and is slidably matched with the shielding cover 62, a needle tube stand buckle 66 is provided at the tail end of the needle tube stand 60, a needle tube stand plug column 67 is protruded from one side of the needle tube stand 60, a needle tube stand push rod 61 is slidably provided in the push rod window 12, and a needle tube stand slot 64 adapted to the needle tube stand plug column 67 is provided on the needle tube stand push rod 61 , so that the needle tube rack plug 67 passes through the needle tube rack slide groove 23 and is plugged into the needle tube rack slot 64. When the needle tube rack push rod 61 moves, it drives the needle tube rack 60 and the needle tube 63 to move. A needle tube rack clamping groove 217 matched with the needle tube rack buckle 66 is provided in the middle of the needle tube rack block 27. The second spring 65 is placed between the needle tube rack block 27 and the needle tube rack 60, so that the needle tube rack 60 moves until the needle tube rack buckle 66 is placed in the needle tube rack clamping groove 217. The second spring 65 is compressed to realize the loading of the needle tube 63 and the needle tube rack 60.

[0054] The tail end of the biopsy needle 53 is fixedly connected to the front end of the needle holder 50, the front end of the biopsy needle 53 extends into the needle tube 63 and slides with the needle tube 63, the tail end of the needle holder 50 is provided with a needle holder buckle 56, one side of the needle holder 50 is provided with a needle holder plug 57, the needle holder push rod 51 is slidably arranged in the push rod window 12, and the needle holder push rod 51 is provided with a needle holder slot 54 adapted to the needle holder plug 57, so that the needle holder plug 57 passes through the needle holder slide groove 2 2 is plugged and matched with the needle holder slot 54, and when the needle holder push rod 51 moves, the needle holder 50 and the biopsy needle 53 are driven to move. The middle part of the needle holder stopper 25 is provided with a needle holder clamping groove 216 adapted to the needle holder buckle 56. The first spring 55 is arranged between the needle holder stopper 25 and the needle holder 50, so that the needle holder 50 moves until the needle holder buckle 56 is placed in the needle holder clamping groove 216, and the first spring 55 is compressed, so that the biopsy needle 53 and the needle holder 50 are loaded.

[0055] The shift assembly 70 includes a conversion block 72, a conversion slider 74, a shift button 71, a shift spring 73, a slider spring 742 and a plug 75. Two front plug blocks 721 are symmetrically arranged on both sides of the front end of the conversion block 72, and two rear plug blocks 722 are symmetrically arranged on both sides of the rear end of the conversion block 72. A rectangular shift groove 221 is arranged on the outer wall of the positioning right sleeve 21. Four shift slots 222 are arranged at the four corners of the shift groove 221 to match the front plug blocks 721 and the rear plug blocks 722. Spring mounting grooves 223 are arranged at both ends of the shift groove 221 for limiting the shift spring 73. When assembled, the shift spring 73 is placed between the conversion block 72 and the positioning right sleeve 21.

[0056] A button plug-in block 711 matched with the shift slot 222 is provided at the bottom end of the shift button 71, an I-shaped button slot 712 is provided in the middle of the button plug-in block 711, button protrusions 713 are provided on both side walls of the button slot 712, a shift button slot 18 matched with the button protrusion 713 is provided on the inner wall of the shift slot 222, and an insert block I-shaped column 724 matched with the button slot 712 is provided on the conversion block 72, so that the button plug-in block 711 of the shift button 71 passes through the shift slot 17 and is plugged into and matched with the insert block I-shaped column 724, so that the shift button 71 presses the conversion block 72, and after the conversion block 72 is axially translated to the desired position, the button protrusion 713 is snapped into the shift button slot 18, which is used to limit the conversion block 72.

[0057] A slider I-shaped column 741 is set on the top of the conversion slider 74, and an I-shaped block slot 723 is set at the bottom of the rear plug block 722. The conversion slider 74 slides with the block slot 723 of the rear plug block 722 through the slider I-shaped column 741; a slider spring 742 is set in the block slot 723, which is used to drive the conversion slider 74 to extend out of the rear plug block 722. When the needle holder 50 triggers the conversion slider 74 to move, the slider spring 742 is compressed; after the slider I-shaped column 741 is inserted into the block slot 723, it is limited by the plug 75 to prevent the conversion slider 74 from detaching from the conversion block 72.

[0058] A conical needle rack squeezing groove 52 is also provided at the front end of the needle rack 50, so that when the needle rack 50 moves to abut against the needle tube rack block 27, the needle tube rack buckle 66 is squeezed by the needle rack squeezing groove 52, the needle tube rack buckle 66 is disengaged from the needle tube rack slot 217, and the compressed second spring 66 is fired after the needle tube rack 60 is freed from the restraint.

[0059] A conical connecting rod extrusion groove 38 matched with the needle holder buckle 56 is set in the middle of the sliding bracket 32 ​​of the firing link 30, and the firing link 30 is driven to move by the firing button 31. At this time, the sliding bracket 32 ​​moves in the firing chamber 26. When the sliding bracket 32 ​​moves to abut against the needle holder block 25, the needle holder buckle 56 is squeezed by the connecting rod extrusion groove 38, and the needle holder buckle 56 is separated from the needle holder slot 216. After the needle holder 50 is freed from the restraint, the compressed first spring 55 is fired, thereby realizing the movement of the needle holder 50, and the needle holder 50 realizes the firing of the needle tube holder 60.

[0060] In the process of the firing link 30 firing the needle holder 50 and the needle holder 50 firing the needle tube holder 60, when the conversion block 72 is not pressed, the front insert block 721 and the rear insert block 722 of the conversion block 72 do not enter the sleeve assembly, and will not interfere with the travel of the needle tube holder 60 and the needle holder 50; when the conversion block 72 is pressed by the shift button 71, the front insert block 721 and the rear insert block 722 of the conversion block 72 are pressed into the sleeve assembly, and the needle tube holder 60 is placed between the front insert block 721 and the rear insert block 722, and the needle holder 50 is placed on the rear side of the rear insert block 722, and the travel of the needle holder 50 fired by the firing link 30 and the needle holder 50 is limited by the rear insert block 722, and the needle holder 50 drives the conversion slider 74 to move, and the two conversion sliders 74 are between An extrusion groove is formed, and the extrusion groove squeezes the needle tube rack buckle 66 when moving, and the needle tube rack buckle 66 is disengaged from the needle tube rack slot 217, and the conversion slider 74 replaces the needle rack 50 to fire the needle tube rack 60. The stroke of the needle tube rack 60 is limited by the front insert block 721, thereby realizing the gear adjustment of the moving stroke of the needle rack 50 and the needle tube rack 60. The specific stroke can be set to two gears of 10mm and 20mm, that is, when the shift button 71 is not fired, the moving stroke of the needle rack 50 and the needle tube rack 60 is 20mm, and when the shift button 71 is fired, the moving stroke of the needle rack 50 and the needle tube rack 60 is 10mm. The spacing and position of the front insert block 721, the rear insert block 722 and the conversion slider 74 can be set according to the stroke.

[0061] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A fully automatic biopsy needle, characterized in that: The invention comprises a needle holder assembly, a needle tube holder assembly, a cover body assembly, a sleeve assembly, a shift assembly, a firing link and a safety rod; the sleeve assembly is placed in the cover body assembly, the firing link is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing link slides axially along the sleeve assembly, the needle holder assembly comprises a needle holder and a biopsy needle, the needle tube holder assembly comprises a needle tube holder and a needle tube, the needle holder and the needle tube holder are slidably arranged in the sleeve assembly, the front end of the needle tube extends out of the sleeve assembly, the front end of the biopsy needle penetrates into the needle tube, a safety rod slot is arranged at the rear end of the firing link, a safety block is arranged at the rear end of the safety rod slot, a safety slot matched with the safety rod is arranged at the rear end of the cover body assembly so that the safety rod slides radially along the cover body assembly, a travel groove is arranged in the middle part of the safety rod, when locked, the safety block abuts against the safety rod, when unlocked, the safety rod is pushed so that the travel groove cooperates with the safety block, and the firing link moves along the travel groove to realize firing; The shift assembly comprises a conversion block and a conversion slider. Front plug blocks are respectively arranged on both sides of the front end of the conversion block, and rear plug blocks are respectively arranged on both sides of the rear end of the conversion block. The outer wall of the sleeve assembly is provided with a shift slot adapted to the front plug block and the rear plug block. A shift 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. After the front plug block and the rear plug block of the conversion block are pressed into the sleeve assembly, the needle tube holder is arranged between the front plug block and the rear plug block, and the needle holder is arranged At the rear side of the rear insert block, a sliding conversion slider is provided at the bottom of the rear insert block. When the conversion block is not pressed, the firing connecting rod fires the needle holder, and the needle holder fires the needle tube holder. When the conversion block is pressed, the front insert block and the rear insert block extend into the sleeve assembly, and the firing connecting rod fires the needle holder, and the travel of the needle holder is limited by the rear insert block, and the needle holder drives the conversion slider to move, and the conversion slider fires the needle tube holder, and the travel of the needle tube holder is limited by the front insert block, so as to realize the gear adjustment of the moving travel of the needle holder and the needle tube holder; The cover assembly comprises an upper cover and a lower cover which are semi-cylindrical and plug-fitted.

2. The fully automatic biopsy needle according to claim 1, characterized in that: The shift assembly also includes a shift button, a button plug-in block is arranged at the bottom end of the shift button, an I-shaped button slot is arranged in the middle of the button plug-in block, button protrusions are arranged on both sides of the button slot, a shift slot suitable for the button plug-in block to pass through is arranged on the cover body assembly, a shift button slot matching the button protrusion is arranged on the inner wall of the shift slot, and an I-shaped column of the plug-in block matching the button slot is arranged on the conversion block, so that the button plug-in block of the shift button passes through the shift slot and is plugged into the I-shaped column of the plug-in block, so that the shift button presses the conversion block, and the button protrusion is inserted into the shift button slot after the conversion block moves to the desired position.

3. The fully automatic biopsy needle according to claim 2, characterized in that: The top of the conversion slider is provided with a slider I-shaped column, the bottom of the front plug block is provided with an I-shaped plug block slot, and the conversion slider is slidably matched with the plug block slot of the front plug block via the slider I-shaped column.

4. The fully automatic biopsy needle according to claim 3, characterized in that: A slider spring is arranged in the insert block slide groove to drive the conversion slider to extend out and insert the rear block.

5. The fully automatic biopsy needle according to claim 3 or 4, characterized in that: Slides are arranged on both sides of the travel groove, and the slides are lower than the two ends of the safety rod and higher than the travel groove, so that the safety block abuts against the slide when the firing link is locked, and the travel groove is placed at the safety block after the safety rod moves.

6. The fully automatic biopsy needle according to claim 5, characterized in that: The inner sides of both ends of the safety rod are respectively provided with limit stop bars, which are placed between the safety slots on both sides of the cover assembly during assembly, so that when the safety rod moves, the inner wall of the cover assembly blocks and limits the limit stop bars.

7. The fully automatic biopsy needle according to claim 6, characterized in that: It also includes a firing button, the firing link includes a connecting rod body, a firing button slot is arranged at the front end of the connecting rod body, a button clamping column is arranged on the firing button, and a firing window is arranged on the cover body assembly. The button clamping column passes through the firing window and is clamped into the firing button slot, so that the firing button outside the cover body assembly moves and drives the firing link to move.

8. The method for using the fully automatic biopsy needle according to claim 7, characterized in that: The method comprises the following steps: firstly, loading the syringe holder and the needle holder, and then pushing the safety lever so that the travel groove is aligned with the safety block of the firing connecting rod; when the shift assembly is in the initial state, the shift spring supports the conversion block, and the front insert block and the rear insert block have not entered the sleeve assembly; the firing connecting rod is driven to move by the firing button, and the needle holder is driven to disengage from the limit by the firing connecting rod, so as to realize the firing of the needle holder and the biopsy needle, and the needle holder fires the syringe holder to disengage from the limit, so as to realize the firing of the syringe holder and the needle tube; when shifting the travel, pressing the shift button makes the front insert block and the rear insert block enter the sleeve assembly, and at this time the rear syringe holder is placed between the front insert block and the rear insert block. The needle holder is placed on the rear side of the rear insert block, and then the shift button is translated so that the button protrusion is inserted into the shift button slot to limit the conversion block, and the slider spring supports the conversion slider so that the conversion slider is protruded; then the firing button drives the firing connecting rod to move, and the firing connecting rod drives the needle holder to disengage from the limit to realize the firing of the needle holder and the biopsy needle. The stroke of the needle holder is limited by the rear insert block, and the conversion slider is driven by the needle holder to move, and an extrusion groove is formed between the two conversion sliders. The firing needle tube holder is disengaged from the limit, and the stroke of the needle tube holder is limited by the front insert block, thereby realizing the gear adjustment of the needle holder and the needle tube holder's moving stroke.

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