CN113440176B

CN113440176B - Biopsy device

Info

Publication number: CN113440176B
Application number: CN202010230015.2A
Authority: CN
Inventors: 胡超宇; 高占强
Original assignee: Promisemed Hangzhou Meditech Co ltd
Current assignee: Promisemed Hangzhou Meditech Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2024-09-17
Anticipated expiration: 2040-03-27
Also published as: CN113440176A

Abstract

The invention discloses a biopsy device, which comprises a needle core, a needle tube and an operating handle for controlling the needle tube of the needle core to carry out biopsy sampling, wherein the operating handle comprises a mounting frame, a first sliding block, a first firing spring, a second sliding block and a second firing spring are arranged in the mounting frame, and a winding firing mechanism for driving the first sliding block and the second sliding block to move backwards and position and compressing the first firing spring and the second firing spring to store potential is also arranged on the mounting frame and is used for releasing a firing unlocking mechanism for positioning the first sliding block and/or the second sliding block. The scheme has reasonable structure, convenient and comfortable operation and certain cost advantage.

Description

Biopsy device

Technical Field

The invention relates to the field of medical instruments, relates to a biopsy device for biopsy sampling, and in particular relates to a multifunctional full-automatic biopsy device.

Background

The biopsy device is a medical instrument, and is suitable for biopsy sampling, cell sucking and the like of various organs such as liver, kidney, lung, prostate, mammary gland, thyroid gland and the like. Has the characteristics of simple and quick operation, convenient use, quick sampling and the like.

Since the us bard company developed and sold biopsy needle products earlier, which is dominant in the market, japan TSK company also developed fully automatic biopsy needle products after bard, giving more choices to doctors clinically. The full-automatic biopsy needle can be operated by one hand, has small winding difficulty, has front and back 2 firing triggers and two holding modes of transverse holding and direct holding, is convenient for doctors to select according to actual conditions, is simple and convenient to operate, is quick to sample and has low risk, and the biopsy needle is well-received by a plurality of clinicians.

Patent document publication CN104797200 discloses a biopsy device comprising a cutting cannula mechanism with a cutting cannula and an inner stylet mechanism with an inner stylet coaxial with the cutting cannula. The firing mechanism is configured to fire the cutting cannula mechanism and the inner stylet mechanism by retracting each cutting cannula and the inner stylet in a proximal direction to a firing position. The trigger device is configured to fire at least one of the inner stylet mechanism and the cutting cannula mechanism to advance the respective at least one of the inner stylet and the cutting cannula in a distal direction from the firing position. The selector assembly includes a selector switch having an external tab accessible by a user. The selector assembly is arranged to select between at least two user selectable modes of operation and at least two user selectable transmission distances.

However, biopsy devices currently on the market suffer from certain drawbacks, such as: the firing device has low reliability, and the condition that the firing cannot be performed or the firing is difficult can occur; the firing device is not provided with a safety button, so that the situation of false firing is easy to occur; the inner needle and the outer needle are linked to trigger, so that the feedback sampling effect of a customer is not ideal; and, the full-automatic needle can not be wound by one hand, and the winding can be carried out by both hands, so that the operation is complicated; the product only has one firing position/button, can not be transversely held, is inconvenient to use and the like. In addition, there is generally only one sampling stroke (full stroke sampling or full slot sampling), and when only a small amount of tissue needs to be sampled, the biopsy device with a shorter sampling stroke needs to be replaced, which causes inconvenience and increases the use cost.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a biopsy device which is reasonable in structure, convenient and comfortable to operate and has certain cost advantages.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The biopsy device comprises a needle core, a needle tube and an operating handle for controlling the needle tube of the needle core to perform biopsy sampling, wherein the operating handle comprises a mounting frame, a first sliding block, a first firing spring, a second sliding block and a second firing spring are arranged in the mounting frame, the rear end of the needle tube is fixedly connected with the first sliding block, the rear end of the needle core penetrates through the needle tube and the first sliding block and then is fixedly connected with the second sliding block, the front end of the first firing spring abuts against the first sliding block, the rear end of the first firing spring abuts against the mounting frame, the front end of the second firing spring abuts against the second sliding block, and the rear end of the second firing spring abuts against the mounting frame; the mounting frame is also provided with a winding firing mechanism for driving the first sliding block and the second sliding block to move backwards and position and compressing the first firing spring and the second firing spring to store potential, and a firing unlocking mechanism for releasing the positioning of the first sliding block and/or the second sliding block; the winding firing mechanism comprises a first winding button, a second winding button, a first firing block and a second firing block, wherein the first winding button is connected with the first sliding block and can drive the first sliding block to move backwards, a first elastic barb is arranged on the first sliding block, after the first sliding block moves backwards in place, the first elastic barb is hooked and locked with the first firing block, the second winding button is connected with the second sliding block and can drive the second sliding block to move backwards, a second elastic barb is arranged on the second sliding block, and after the second sliding block moves backwards in place, the second elastic barb is hooked and locked with the second firing block, and the first firing block and the second firing block are respectively and movably connected with the mounting frame; the firing unlocking mechanism comprises a firing connecting rod, the firing connecting rod is arranged on the mounting frame and can move back and forth, the firing connecting rod is movably connected with the first firing block and can drive the first firing block to release the locking state with the first elastic barb, and the firing connecting rod is movably connected with the second firing block and can drive the second firing block to release the locking state with the second elastic barb.

Preferably, the mounting frame comprises a first mounting frame and a second mounting frame which are fixed in a left-right fit manner, a handle shell is fixed outside the mounting frame, the handle shell comprises a first shell and a second shell which are fixed in a left-right fit manner, the first shell and the second shell are fixedly connected through fasteners, the first mounting frame and the second mounting frame are fixedly connected through fasteners, and the mounting frame and the handle shell are fixed in a fit manner through positioning columns and positioning grooves; a sleeve is fixed at the front end of the handle shell, and the needle core and the needle tube pass through the sleeve.

Preferably, the first winding button and the second winding button are arranged at the front end of the handle shell and are arranged side by side left and right, an extension arm of the first winding button extending into the handle shell is connected with the first sliding block so as to be capable of pushing the first sliding block backwards, an extension arm of the second winding button extending into the handle shell is connected with the second sliding block so as to be capable of pushing the second sliding block backwards, and extension arms of the first winding button and the second winding button are respectively arranged at the left side and the right side of the mounting frame.

Preferably, the firing connecting rod is pushed by a back firing button or a side firing button, and the back firing button or the side firing button is integrally formed or fixedly matched with the firing connecting rod.

Preferably, an insurance button is further arranged, the insurance button and the firing connecting rod are limited through the cooperation of the locking part and the locking groove, so that the locking and fixing of the firing connecting rod are realized, and the locking part and the locking groove are disengaged through moving the insurance button, so that the locking of the firing connecting rod is released.

Preferably, the front end of the first sliding block is provided with a first shock-absorbing gasket, and the front end of the second sliding block is provided with a second shock-absorbing gasket.

Preferably, the front part of the mounting frame is provided with a first slide way, the first sliding block and the first firing spring are mounted in the first slide way, the rear part of the mounting frame is provided with a second slide way, the second sliding block and the second firing spring are mounted in the second slide way, and blocking parts are arranged at the front end of the first slide way, the rear end of the second slide way and between the first slide way and the second slide way, so that the first sliding block is limited to slide in the first slide way, and the second sliding block is limited to slide in the second slide way; the mounting frame is provided with a third slide way and a fourth slide way, the third slide way is communicated with the first slide way, the third slide way is provided with a front side wall and a rear side wall so as to limit the front-back movement of the first trigger block, the first trigger block slides up and down along the third slide way, and one end of the first trigger block is close to or far away from the first slide way to realize locking and unlocking with a first elastic barb on the first slide block; the fourth slide way is communicated with the second slide way, the fourth slide way is provided with a front side wall and a rear side wall so as to limit the second firing block to move back and forth, the second firing block slides up and down along the fourth slide way, and one end of the second firing block is close to or far away from the second slide way so as to realize locking and unlocking of a second elastic barb on the second slide block.

Preferably, the firing connecting rod is connected with the first connecting column in a matching way through the first sliding groove so as to drive the first firing block to move up and down, and is connected with the second connecting column in a matching way through the second sliding groove so as to drive the second firing block to move up and down, wherein the first sliding groove comprises a first sliding groove retaining section which can not drive the first firing block to move up and down and a first sliding groove lifting section which is used for driving the first firing block to move up and down, and the second sliding groove comprises a second sliding groove retaining section which can not drive the second firing block to move up and down and a second sliding groove lifting section which is used for driving the second firing block to move up and down; when the firing connecting rod moves forwards or backwards to perform firing, the second firing block is driven to move at first, so that the second sliding block connected with the needle core is driven to unlock and fire, and then the first firing block is driven to move, so that the first sliding block connected with the needle tube is driven to unlock and fire.

Preferably, the firing connecting rod is provided with a reset part, and a reset spring is arranged between the reset part and the mounting frame; the mounting frame is provided with a reset spring space and a fifth slideway, the reset spring is limited in the reset spring space, the rear end of the reset spring space is communicated with the fifth slideway, the reset part on the firing connecting rod is inserted in the fifth slideway and can move back and forth, when the firing connecting rod moves forward, the front end of the reset spring is propped against the mounting frame, and the rear end of the reset spring is propped against the reset part on the firing connecting rod.

Preferably, the sampling stroke adjusting mechanism comprises a sampling stroke button, wherein the sampling stroke button is provided with a hooking boss and an avoidance groove, and the hooking boss or the avoidance groove can be arranged on a front-back moving path of the first elastic barb on the first sliding block by moving the sampling stroke button; when the sampling travel button is in a locking state, the hooking boss is arranged on a front-back moving path of the first elastic barb, the first elastic barb can be hooked and positioned with the hooking boss to realize the winding locking, and when the first sliding block is locked at the position, only part of the sampling groove of the needle core can be exposed out of the needle tube to realize non-full travel sampling; when the sampling travel button is in an unlocking state, the avoidance groove is arranged on a front-back moving path of the first elastic barb, the first elastic barb can freely pass through and is not blocked, the first elastic barb can be hooked and positioned with the first firing block so as to realize winding locking, and when the first sliding block is locked at the position, all sampling grooves of the needle core can be exposed out of the needle tube so as to realize full-travel sampling; the sampling travel button is connected with an elastic body for returning the sampling travel button from a locking state to an unlocking state, the movable end of the elastic body is connected with the sampling travel button, the fixed end of the elastic body is connected with the mounting frame or the handle shell, the sampling travel button is provided with a positioning structure for positioning the sampling travel button in the locking state, and the positioning structure can be driven by the firing connecting rod to release the positioning so that the sampling travel button can return from the locking state to the unlocking state under the driving of the elastic body; the positioning structure comprises a first arm and a second arm, wherein fixed ends of the first arm and the second arm are fixedly connected with one end of the sampling stroke button or integrally formed, a gap is reserved between the first arm and the second arm, free ends of the first arm and the second arm can approach each other and elastically return, the second arm is longer than the first arm, a first clamping hook is formed on one side, far away from the second arm, of the free end of the first arm, and a clamping hole for the first arm and the second arm to be inserted is formed in the mounting frame; when the sampling travel button is in a locking state, the free ends of the first arm and the second arm penetrate through the clamping holes, and the first clamping hooks on the first arm are clamped with the clamping holes so as to position the sampling travel button in the locking state; when in firing, the pushing part arranged at the front part of the firing connecting rod pushes the free end of the first arm, so that the first clamping hook is separated from the clamping hole on the mounting frame and is released from positioning, and the sampling stroke button is driven by the restoring elastic force of the elastic body to restore to the unlocking state from the locking state, and the free end of the first arm is withdrawn from the clamping hole.

Due to the adoption of the technical scheme, the needle core needle tube can be sequentially fired, tissues can be fully dropped into the inner needle sampling groove, the sampling effect is good, the structure is reasonable, the operation is convenient and comfortable, and certain cost advantages are achieved. The safety button is arranged, so that misoperation can be effectively prevented, and the sampling process is safer. The invention is provided with the sampling travel button, can be suitable for pathological tissues with different sizes, can obtain tissue samples with different lengths, has the advantage of wide application, can reduce the damage to healthy tissues, and effectively reduces the pain of patients. In addition, the shock-absorbing gasket is arranged on the sliding block, so that the impact force of the sliding block can be buffered, fear of working noise to a patient is reduced, and the user experience is good.

Drawings

FIG. 1 is a perspective view of example 1;

FIG. 2 is an exploded view of example 1;

FIG. 3 is a schematic view of the firing bar;

FIG. 4 is a schematic illustration of the mating structure of the firing link and the sample stroke button;

FIG. 5 is a schematic view of the mating structure of the first mounting frame and associated components;

FIG. 6 is a schematic illustration of the mating structure of the first mounting frame, firing link and related components;

FIG. 7 is a schematic view of the mating structure of two mounting frames, firing links and related components (view one);

FIG. 8 is a schematic view of the mating structure of the second mounting frame, firing link and related components;

FIG. 9 is a schematic view of the mating structure of two mounting frames, firing links and related components (view II);

FIG. 10 is a partial cross-sectional view of embodiment 1 (safety button lock);

FIG. 11 is one of the upper chord schematic diagrams of example 1;

FIG. 12 is a second diagram of the upper chord of example 1;

FIG. 13 is a partial cross-sectional view of the winding up condition of example 1 (safety button open, full stroke sampling);

FIG. 14 is one of the firing schematic drawings of example 1;

FIG. 15 is a second firing schematic of example 1;

FIG. 16 is a schematic view of the firing mechanism of example 1 (firing link reset);

FIG. 17 is a top chord schematic of the non-full travel sample of example 1;

FIG. 18 is a bottom view (partially cut away) of FIG. 17;

FIG. 19 is a partial cross-sectional view of FIG. 17;

FIG. 20 (a) is one of the full-stroke sampling schematics;

FIG. 20 (b) is a second schematic diagram of a full-stroke sampling;

FIG. 20 (c) is a third of the full-stroke sampling diagrams;

FIG. 21 (a) is one of the non-full-stroke (half-stroke) sampling schematics;

FIG. 21 (b) is a second schematic diagram of non-full-stroke (half-stroke) sampling;

FIG. 21 (c) is a third of the non-full-stroke (half-stroke) sampling schemes.

Wherein 1, a needle core, 2, a needle tube, 3, a sleeve, 4, a first housing, 5, a first shock absorbing washer, 6, a first slider, 61, a first elastic barb, 62, a first connecting portion, 7, a first firing spring, 8, a first mounting frame, 81, a second slide, 82, a second long hole, 83, a first slide, 84, a first long hole, 85, a fourth slide, 86, a fifth slide, 87, a return spring space, 88, a third slide, 89, a positioning protrusion, 9, a second shock absorbing washer, 10, a second slider, 101, a second elastic barb, 102, a second connecting portion, 11, a second firing spring, 12, a safety button, 121, a locking portion, 122, a limit protrusion, 123, a positioning groove, 13, a firing link, 131, a rear firing button, 132, a locking groove, 133, a second slide, 1331, a second slide elevating section, 1332, a second chute holding section, 134, a reset portion, 135, a connecting portion, 136, a first chute, 1361, a first chute holding section, 1362, a first chute lifting section, 137, a limit portion, 138, a pushing portion, 139, a guide rib, 14, a first winding button, 141, a first clamping groove, 15, a sampling stroke button, 151, a hooking boss, 152, a first arm, 153, a first hook, 154, a avoidance groove, 155, a second arm, 156, a second hook, 16, a first firing block, 161, a first connecting post, 17, a side firing button, 171, a limit clip protrusion, 18, a return spring, 19, a second winding button, 191, a second clamping groove, 20, a second housing, 21, an elastic body, 22, a second mounting frame, 220, a positioning post, 221, a clip hole, 23, a second firing block, 231, and a second connecting post.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Example 1:

for convenience of description and understanding, in this embodiment, the sampling end of the needle core is used as the front, the handle end is used as the rear, and the left-right direction and the up-down direction are defined by the vertical front-back direction respectively.

The biopsy device shown in fig. 1 and 2 comprises a needle core 1, a needle tube 2 and an operation handle for controlling the needle core needle tube to perform biopsy sampling, wherein the operation handle comprises a mounting frame, a first sliding block 6, a first firing spring 7, a second sliding block 10 and a second firing spring 11 are arranged in the mounting frame, the rear end of the needle tube 2 is fixedly connected with the first sliding block 6, the rear end of the needle core 1 penetrates through the needle tube 2 and the first sliding block 6 and is fixedly connected with the second sliding block 10, the front end of the first firing spring 7 is propped against the first sliding block 6, the rear end of the first firing spring 7 is propped against the mounting frame, the front end of the second firing spring 11 is propped against the second sliding block 10, and the rear end of the second firing spring 11 is propped against the mounting frame; the mounting frame is also provided with a winding firing mechanism for driving the first sliding block 6 and the second sliding block 10 to move backwards and position and compressing the first firing spring 7 and the second firing spring 11 to store potential, and a firing unlocking mechanism for releasing the positioning of the first sliding block 6 and/or the second sliding block 10.

The winding firing mechanism comprises a first winding button 14, a second winding button 19, a first firing block 16 and a second firing block 23, wherein the first winding button 14 is connected with the first slider 6 and can drive the first slider 6 to move backwards, a first elastic barb 61 is arranged on the first slider 6, after the first slider 6 moves backwards in place, the first elastic barb 61 is hooked and locked with the first firing block 16, the second winding button 19 is connected with the second slider 10 and can drive the second slider 10 to move backwards, a second elastic barb 101 is arranged on the second slider 10, after the second slider 10 moves backwards in place, the second elastic barb 101 is hooked and locked with the second firing block 23, and the first firing block 16 and the second firing block 23 are respectively and movably connected with the mounting frame.

The firing unlocking mechanism comprises a firing connecting rod 13, the firing connecting rod 13 is arranged on the mounting frame and can move back and forth, the firing connecting rod 13 is movably connected with the first firing block 16 and can drive the first firing block 16 to release the locking state with the first elastic barb 61, and the firing connecting rod 13 is movably connected with the second firing block 23 and can drive the second firing block 23 to release the locking state with the second elastic barb 101.

In this embodiment, as shown in fig. 2, the mounting frame includes a first mounting frame 8 and a second mounting frame 22 that are fixed in a left-right fit manner, a handle housing is fixed outside the mounting frame, the handle housing includes a first housing 4 and a second housing 20 that are fixed in a left-right fit manner, the first housing 4 and the second housing 20 are fixedly connected by fasteners, the first mounting frame 8 and the second mounting frame 22 are fixedly connected by fasteners, and the mounting frame and the housing are fixed by matching a positioning column 220 and a positioning slot. The structure is simple and reasonable, the assembly is convenient, and the cost performance is high.

In this embodiment, the core 1 (e.g. the rear end of the core) is provided with an anti-slip and anti-drop feature (e.g. concave, convex, etc.), and the anti-slip feature can firmly connect (e.g. bond) the core and the slider 10; the needle cannula 2 is provided with anti-slip features (e.g., flare, flange faces, etc.) that enable the needle cannula to be securely attached (e.g., glued) to the slider 6 (e.g., at the rearward end of the needle cannula).

In this embodiment, the sleeve 3 is preferably fixed to the front end of the handle housing, and the core 1 and the needle tube 2 pass through the sleeve 3, so that the sleeve 3 can ensure the coaxiality of the core 1 and the needle tube 2 during movement.

In this embodiment, as shown in fig. 1 and 2, the first winding button 14 and the second winding button 19 are disposed at the front end of the handle housing and are disposed side by side left and right, the extension arm of the first winding button 14 extending into the handle housing is connected with the first slider 6 so as to be capable of pushing the first slider 6 backward, the extension arm of the second winding button 19 extending into the handle housing is connected with the second slider 10 so as to be capable of pushing the second slider 10 backward, and the extension arm of the first winding button 14 and the extension arm of the second winding button 19 are disposed on the left and right sides of the mounting frame, respectively. Thus, the two winding buttons are pressed to independently perform winding operation on the needle core and the needle tube, the operation is convenient, the structure is reasonable, and the winding firing action is reliable and stable.

As shown in fig. 7 and 9, it is preferable that the first slider 6 is provided with a first connection portion 62, and the first connection portion 62 extends out of a first long hole 84 on the mounting frame and is connected to an extension arm of the first winding button 14, and when the first slider 6 moves back and forth, the first connection portion 62 moves back and forth along the first long hole 84; the second slider 10 is provided with a second connection portion 102, and the second connection portion 102 extends out of the second long hole 82 on the mounting frame and is connected to the extension arm of the second winding button 19, and when the second slider 10 moves back and forth, the second connection portion 102 moves back and forth along the second long hole 82. Therefore, the structure is reasonable, the installation is convenient, and the connection is reliable. In other embodiments, the connecting portion may be fixed or integrally formed on the extension arm of the winding button, and inserted into the slider in the mounting frame after passing through the long hole in the mounting frame. Preferably, the extension arm of the first winding button 14 is matched with the first clamping groove 141 and the first connecting portion 62 to enable the first sliding block 6 to be pushed backwards, and the extension arm of the second winding button 19 is matched with the second clamping groove 191 and the second connecting portion 102 to enable the second sliding block 10 to be pushed backwards. Further, the clamping grooves limit the connecting portions from front and rear sides, so that the winding buttons and the corresponding sliding blocks move synchronously, operators can intuitively know whether the biopsy device is in a winding state or not, and repeated operation is avoided. In other embodiments, the extension arm of the winding button is connected with the corresponding slide block only when the winding button is pressed and performs winding, after the winding is completed, the extension arm of the winding button is separated from the corresponding slide block, the slide block and the needle core or the needle tube of the slide block are independently fired, the winding button is not driven to move together, and in order to avoid any movement of the winding button, a spring can be arranged in the handle shell to reset the winding button. The connection may be cylindrical, square cylindrical or any other shape capable of transmitting a force.

In this embodiment, as shown in fig. 5 to 9, the front portion of the mounting frame is provided with a first slide 83, the first slider 6 and the first firing spring 7 are mounted in the first slide 83, the rear portion of the mounting frame is provided with a second slide 81, the second slider 10 and the second firing spring 11 are mounted in the second slide 81, and blocking portions are provided between the front end of the first slide 83, the rear end of the second slide 81, and the first slide 83 and the second slide 81, so that the first slider 6 is restricted to slide in the first slide 83, and the second slider 10 is restricted to slide in the second slide 81. A third slide way 88 and a fourth slide way 85 are arranged on the mounting frame, the third slide way 88 is communicated with the first slide way 83, the third slide way 88 is provided with a front side wall and a rear side wall so as to limit the front-back movement of the first firing block 16, the first firing block 16 slides up and down along the third slide way 88, and one end of the first firing block 16 is close to or far away from the first slide way 83 to realize locking and unlocking with the first elastic barb 61 on the first slide block 6; the fourth slide way 85 is communicated with the second slide way 81, the fourth slide way 85 is provided with a front side wall and a rear side wall so as to limit the back-and-forth movement of the second firing block 23, the second firing block 23 slides up and down along the fourth slide way 85, and one end of the second firing block 23 is close to or far away from the second slide way 81 so as to realize locking and unlocking with the second elastic barb 101 on the second sliding block 10. Like this, the mode of sliding is adopted to the percussion piece and slider locking or unblock cooperation, and the slide lateral wall can firmly restrict the percussion piece during the locking, simple structure, and the locking is reliable stable to, two percussion pieces are two sliders of independent locking and unlocking respectively, can effective control or rational design needle core needle tubing's percussion time in proper order, guarantees good sampling effect.

In this embodiment, the front end of the first slider 6 is provided with a first damping washer 5, and the first damping washer 5 has the function of buffering the first slider 6 from striking the front blocking portion of the first slideway 83, so as to reduce noise and improve service life; the front end of the second sliding block 10 is provided with a second damping washer 9, and the second damping washer 9 has the function of buffering the impact of the second sliding block 10 on the front blocking part of the second slideway 81, so that noise is reduced, and service life is prolonged.

In this embodiment, as shown in fig. 3 and 4, the firing link 13 is cooperatively connected with the first connecting post 161 through the first chute 136 so as to drive the first firing block 16 to move up and down, and the firing link 13 is cooperatively connected with the second connecting post 231 through the second chute 133 so as to drive the second firing block 23 to move up and down, wherein the first chute 136 includes a first chute retaining section 1361 that cannot drive the first firing block 16 to move up and down and a first chute lifting section 1362 that is used to drive the first firing block 16 to move up and down, and the second chute 133 includes a second chute retaining section 1332 that cannot drive the second firing block 23 to move up and down and a second chute lifting section 1331 that is used to drive the second firing block 23 to move up and down; when the firing link 13 moves forwards or backwards to perform firing, the second firing block 23 is driven to move first, so that the second slider 10 connected with the needle core 1 is driven to unlock the firing, and then the first firing block 16 is driven to move, so that the first slider 6 connected with the needle tube 2 is driven to unlock the firing. Like this, the linkage that two spouts adopted the segmentation to set up has realized two sliders fires in proper order, through the length cooperation that sets up the holding section and the lift section of two spouts design the sequential firing interval time of nook closing member needle tubing, fully guarantees fine sampling effect to simple structure, convenient to use, the operation is reliable.

In this embodiment, the firing link 13 is advanced to fire, the first chute retaining section 1361 is positioned in front of and in communication with the first chute lifting section 1362, and the second chute lifting section 1331 is positioned in front of and in communication with the second chute retaining section 1332. The structure is reasonable, the use is convenient, and the operation habit of doctors is met. In other embodiments, the firing link 13 may also perform firing by other movement means, such as, for example, the firing link 13 moving rearward to perform firing, in which case the first chute retaining section 1361 is located rearward of the first chute lifting section 1362 and communicates with both, and the second chute lifting section 1331 is located rearward of the second chute retaining section 1332 and communicates with both.

Preferably, the first chute 136 and the second chute 133 are through holes or grooves with upper side walls and lower side walls, and such chute can drive the firing block to move upwards and also drive the firing block to move downwards, so that the two firing blocks do not need to be provided with a reset mechanism (such as a reset spring, etc.), thereby facilitating installation and reducing cost.

In other embodiments, the first chute 136 and/or the second chute 133 are flanges or grooves with only an upper side wall or a lower side wall, and the chute can drive the firing block to move up or down to contact the locking state of the firing block and the elastic hook, and the firing block needs to be provided with a reset mechanism (such as a reset spring or the like) to reset the firing block.

Preferably, the sliding groove holding section is straight front and back, the sliding groove lifting section is in a slope shape, and one of the two sliding grooves is L-shaped and the other is inverted L-shaped because the holding section and the lifting section of the two sliding grooves are oppositely arranged front and back.

In this embodiment, the first chute 136 and the second chute 133 are disposed on the firing link 13, the first connecting post 161 is disposed on the first firing block 16, and the second connecting post 231 is disposed on the second firing block 23. Therefore, the structure is simpler, more reasonable and reliable, the firing action is accurate and rapid, the movement is smoother and more reliable, and the firing connecting rod is more labor-saving. In other embodiments, it may be: the first chute 136 is arranged on the first firing block 16, the second chute 133 is arranged on the second firing block 23, and the first connecting column 161 and the second connecting column 231 are arranged on the firing link 13, so that the volume of the firing block is larger.

In this embodiment, the first firing block 16 and the second firing block 23 are positioned below the first sled 83 and the second sled 81, respectively.

In this embodiment, as shown in fig. 5 and 8, a reset portion 134 is disposed on the firing link 13, and a reset spring 18 is disposed between the reset portion 134 and the mounting frame, so that after the firing link 13 moves and fires, the firing link 13 is driven to reset by the reset spring 18. Preferably, the mounting frame is provided with a return spring space 87 and a fifth slide way 86, the return spring 18 is limited in the return spring space 87, the rear end of the return spring space 87 is communicated with the fifth slide way 86, a return part 134 on the firing link 13 is inserted in the fifth slide way 86 and can move back and forth, when the firing link 13 moves forward, the front end of the return spring 18 abuts against the mounting frame, and the rear end of the return spring 18 abuts against the return part 134 on the firing link 13. Thus, the firing connecting rod can be quickly reset, the installation is convenient, the front and back guiding movement is stable and reliable, the moving firing resistance of the firing connecting rod 13 is smaller, and the operation of operators is convenient.

In this embodiment, as shown in fig. 5 and 8, the first slide 83 and the second slide 81 are formed by the first mounting frame 8 and the second mounting frame 22 being disposed together. As shown in fig. 5 to 9, the third slide 88, the fourth slide 85 and the fifth slide 86 are disposed on the first mounting frame 8, and the firing link 13 is disposed between the first mounting frame 8 and the second mounting frame 22 and is located at the left side or the right side of the third slide 88, the fourth slide 85 and the fifth slide 86, so that the structure is reasonable, the assembly is convenient, and the operation is reliable and stable.

Wherein preferably the firing link 13 forms an enlarged area at corresponding locations with the third 88 and fourth 85 ramps to better confine the firing block within the corresponding ramps. Preferably, a side wall of the firing link 13, which is close to the second mounting frame 22, is formed with a guide rib 139, and the guide rib 139 is slidably matched with a corresponding guide groove or front-back guide arranged on the second mounting frame 22, so that the structure is more reasonable, the matching movement is more reliable, and the material is saved. In other embodiments, a guide slot may be formed on a side wall of the firing link 13 adjacent to the second mounting frame 22, and the guide slot slidably engages with a corresponding guide rib provided on the second mounting frame 22 in a front-rear guide manner.

In this embodiment, as shown in fig. 3 to 4 and 6 to 9, the firing link 13 is pushed by a rear firing button 131 or a side firing button 17 exposed outside the handle housing, and the rear firing button 131 or the side firing button 17 is integrally formed with or fixedly engaged with the firing link 13. Preferably, the back firing button 131 is integrally formed at the rear end of the firing connecting rod 13, the side firing button 17 is fixedly connected with the firing connecting rod 13 through plug-in fit, and the side firing button 17 is in limit fit with the handle shell through the limit clamping protrusion 171 and realizes front-back guiding movement. In this embodiment, a connecting portion 135 is disposed on one side of the firing link 13, an extension arm of the side firing button 17 inserted into the handle housing is provided with a clamping groove matched with the insertion sleeve of the connecting portion 135, and two limiting clamping protrusions 171 are disposed on both left and right sides of the side firing button 17, and the two limiting clamping protrusions 171 are inserted into the handle housing and are in snap-fit with the handle housing.

In order to avoid the situation that the collision firing button is in false firing after the product is wound, the safety button 12 is further arranged, the safety button 12 is inserted into the handle shell and passes through one side of the firing connecting rod 13, at least one end of the safety button 12 protrudes out of the handle shell, the safety button 12 and the firing connecting rod 13 are locked and fixed through the matching limit of the locking part 121 and the locking groove 132, and the locking part 121 and the locking groove 132 are disengaged through moving the safety button 12, so that the firing connecting rod 13 is unlocked. In this embodiment, the safety button 12 moves up and down in the handle housing, the locking portion 121 is disposed on the safety button 12, the firing link 13 is provided with a corresponding locking groove 132, when the safety button 12 moves upward, the locking portion 121 leaves the locking groove 132, the firing link 13 can move forward and backward to perform firing, when the safety button 12 moves downward, the locking portion 121 is blocked into the locking groove 132 to realize limiting locking, and the firing link 13 cannot move forward and backward. The safety button 12 is located the rear end of installing frame, and the installing frame rear end is equipped with location arch 89, and correspondingly, is equipped with two positioning groove 123 on the safety button 12, and location to the up-and-down movement position of safety button 12 is realized in location arch 89 and positioning groove 123 cooperation, forms clear gear sense and avoids safety button 12 not hard up or arbitrary activity influence use under locking state and unlocking state. In order to prevent the safety button 12 from falling out of the handle housing, a limiting protrusion 122 is further provided on the safety button 12, and the limiting protrusion 122 and the locking portion 121 together can limit the up-down movement range of the safety button 12.

In order to adjust the sampling stroke, biopsy sampling with a plurality of sampling strokes is realized on one biopsy device, and a sampling stroke adjusting mechanism is further provided, as shown in fig. 4, 6 and 7, and the biopsy sampling device comprises a sampling stroke button 15, wherein the sampling stroke button 15 is provided with a hooking boss 151 and a avoiding groove 154, and the hooking boss 151 or the avoiding groove 154 can be arranged on the front-back moving path of the first elastic barb 61 on the first slide block 6 by moving the sampling stroke button 15; when the sampling stroke button 15 is in a locked state, that is, when the hooking boss 151 is disposed on the forward and backward movement path of the first elastic barb 61, as shown in fig. 17 to 19, the first elastic barb 61 can be hooked with the hooking boss 151 to realize the winding locking, and when the first slider 6 is locked at this position, only a part of the sampling groove of the needle core 1 can be exposed out of the needle tube 2 to enable non-full stroke (or half stroke sampling), when the sampling stroke button 15 is in an unlocked state, that is, when the avoidance groove 154 is disposed on the forward and backward movement path of the first elastic barb 61, the first elastic barb 61 can be hooked with the first striking block 16 to realize the winding locking, and when the first slider 6 is locked at this position, all of the sampling groove of the needle core 1 can be exposed out of the needle tube 2 to enable full stroke sampling.

The above-mentioned "full-stroke sampling", also called full-slot sampling, is to puncture all sampling slots of the pointer core 1 into the target sampling tissue to obtain a biopsy sample, and the specific process is as follows:

After the needle core 1 and the needle tube 2 finish winding, the sampling grooves of the needle core 1 are all contained in the needle tube 2, and the front ends of the needle core and the needle tube are penetrated into a target sampling tissue 100, as shown in fig. 20 (a); firstly, the needle core 1 is triggered to penetrate into the target sampling tissue 100, all sampling grooves on the needle core 1 are exposed out of the needle tube 2, and the target sampling tissue 100 fills all sampling grooves, as shown in fig. 20 (b); the needle cannula 2 is then fired and the biopsy sample 301 is cut from the target tissue 100 by the needle cannula 2 and stored in the sample well of the needle core, as shown in fig. 20 (c).

The above-mentioned "non-full-stroke sampling", also called partial-stroke sampling or half-stroke sampling, is to puncture a part of the sampling slot of the pointer core 1 into the target sampling tissue to obtain a biopsy sample, and the specific procedure is as follows:

After the needle core 1 and the needle tube 2 finish winding, the sampling grooves of the needle core 1 are all contained in the needle tube 2, and the front ends of the needle core and the needle tube are penetrated into the target sampling tissue 100, as shown in fig. 21 (a); firstly, the needle core 1 is triggered to penetrate into the target sampling tissue 100, a part of sampling grooves (generally half of the length of the whole sampling grooves) on the needle core 1 are exposed out of the needle tube 2, and the target sampling tissue 100 fills the part of sampling grooves, as shown in fig. 21 (b); the needle tube 2 is then fired, and the biopsy sample 302 is cut from the target puncture tissue 100 by the needle tube 2 and stored in the sampling slot of the needle core, as shown in fig. 21 (c), and the length of the biopsy sample 302 is obviously shorter than that of the full-stroke biopsy sample in fig. 20 (c), so that the requirement of different sampling amounts can be met.

In this embodiment, an elastic body 21 for returning the sampling stroke button 15 from the locked state to the unlocked state is connected to the sampling stroke button 15, a movable end of the elastic body 21 is connected to the sampling stroke button 15, and a fixed end of the elastic body 21 is connected to the mounting frame or the handle housing. The sampling travel button 15 is provided with a positioning structure for positioning the sampling travel button 15 in a locking state, and the positioning structure can be driven by the firing connecting rod 13 to release positioning so that the sampling travel button 15 can return to an unlocking state from the locking state under the drive of the elastic body 21.

The elastic body has various forms, such as a spring, a shrapnel, a rubber piece and the like. In this embodiment, as shown in fig. 6, the elastic body 21 is a V-shaped elastic piece, the middle part of the V-shaped elastic piece is fixed on the sampling travel button 15, and two ends of the V-shaped elastic piece are clamped and fixed on the mounting frame. The structure is simple, the recovery is reliable, and the installation is convenient.

In this embodiment, as shown in fig. 4 and 7, the positioning structure includes a first arm 152 and a second arm 155, fixed ends of the first arm 152 and the second arm 155 are fixedly connected or integrally formed with one end of the sampling stroke button 15, a gap is left between the first arm 152 and the second arm 155, free ends of the first arm 152 and the second arm 155 can approach each other and elastically return, the second arm 155 is longer than the first arm 152, a first hook 153 is formed on a side, far away from the second arm 155, of the free end of the first arm 152, and a clamping hole 221 into which the first arm 152 and the second arm 155 can be inserted is formed on the mounting frame; as shown in fig. 17 to 19, when the sampling stroke button 15 is in the locked state, the free ends of the first arm 152 and the second arm 155 both pass through the clamping hole 221 and the first catch 153 on the first arm 152 is clamped with the clamping hole 221 to position the sampling stroke button 15 in the locked state; during firing, the pushing portion 138 disposed at the front of the firing link 13 pushes the free end of the first arm 152, so that the first hook 153 is disengaged from the clamping hole 221 on the mounting frame and is released from positioning, and the sampling stroke button 15 is driven by the restoring elastic force of the elastic body 21 to return to the unlocking state from the locking state, and the free end of the first arm 152 exits from the clamping hole 221. The structure is simple and reasonable, the positioning is reliable, the unlocking is convenient, and the manufacturing cost is low.

In the present embodiment, the first arm 152 and the second arm 155 are disposed back and forth and the second arm 155 is located in front of the first arm 152. In other embodiments, the first arm 152 and the second arm 155 are disposed above and below each other and the second arm 155 is located above or below the first arm 152.

In this embodiment, the free end of the second arm 155 far away from the first arm 152 is provided with the second hook 156, so that the sampling travel button 15 can be prevented from being separated from the mounting frame by the limit fit of the second hook 156 and the clamping hole 221, and the structure is reasonable and the assembly is convenient.

In this embodiment, the front end of the firing link 13 is further provided with a limiting portion 137, when the pushing portion 138 on the firing link 13 pushes the free end of the first arm 152, the pushing portion 138 and the limiting portion 137 are respectively located at the left and right sides of the clamping hole 221, so that the offset of the front end of the firing link 13 caused by the pushing force can be avoided, the movement stability of the firing link 13 is improved, successful firing is ensured, and the service life is prolonged.

In this embodiment, the elastic body 21, the first arm 152 and the second arm 155 are respectively located on the left and right sides of the hooking boss 151 and the avoidance groove 154. The fixed ends of the first arm 152 and the second arm 155 extend to the position of the escape recess 154. Thus, not only is the structure stable and the locking reliable, but also the positioning structure formed by the first arm 152 and the second arm 155 has better elasticity and longer service life.

Further preferably, the sampling stroke button 15 is provided with a limit boss for limiting the further backward movement of the first slider 6 at the rear of the hooking boss 151, and a space for accommodating the hooking protrusion of the first elastic barb 61 is left between the limit boss and the hooking boss 151. In this way, when the sampling travel button 15 is in a locking state, the first slider 6 can be prevented from moving backwards and locking up with the first trigger block 16, so that non-travel sampling failure and operation failure can be avoided.

In other embodiments, multiple sampling travel buttons 15 may also be provided to accommodate taking biopsy specimens of different lengths.

When the biopsy device is not in use, as shown in fig. 10, the first slider 6 and the second slider 10 are in an unchorded state, the sampling slot of the needle core 1 is accommodated in the needle tube 2, the safety button 12 locks the firing connecting rod 13, and the back firing button 131 and the side firing button 17 cannot be pressed.

The winding firing process/method for full-stroke sampling of the biopsy device comprises the following steps:

1) Winding up;

As shown in fig. 11 and 12, the first winding button 14 and the second winding button 19 are pressed, respectively; the first slider 6 is driven to move backwards through the first winding button 14 to compress the first striking spring 7 until the first elastic barb 61 on the first slider 6 is locked with the first striking block 16, and the winding of the first slider 6 and the needle tube 2 is completed; the second slider 10 is driven to move backwards through the second winding button 19 to compress the second firing spring 11 until the second elastic barb 101 on the second slider 10 is locked with the second firing block 23, and the second slider 10 and the needle core 1 finish winding; at this time, the safety button 12 preferably locks the firing link 13 to avoid false firing.

2) Opening the insurance;

as shown in fig. 13, the safety button 12 is opened, and the lock on the firing link 13 is released.

3) Firing;

Pressing the back firing button 131 or pushing the side firing button 17 forward to drive the firing link 13 to move forward;

firstly, as shown in fig. 14, the firing link 13 cooperates with the relative movement of the second chute lifting section 1331 in the second chute 133 and the second connecting post 231 on the second firing block 23 to drive the second firing block 23 to move downwards, so that the second firing block 23 is unlocked from the second elastic barb 101 on the second slider 10, the second slider 10 moves forwards under the pushing of the second firing spring 11, and the unlocking firing of the second slider 10 and the needle core 1 is completed; at the same time, the firing link 13 maintains the first firing block 16 stationary by the relative movement of the first sled holding section 1361 of the first sled 136 and the first connecting post 161 on the first firing block 16, maintaining the locked state of the first firing block 16 and the first sled 6; thus, the sampling groove of the needle core 1 exposes the tip of the needle tube 2.

Then, as the firing link 13 continues to move forward, as shown in fig. 15, the firing link 13 cooperates with the relative movement of the first chute lifting section 1362 in the first chute 136 and the first connecting post 161 on the first firing block 16 to drive the first firing block 16 to move downward, so that the first firing block 16 and the first elastic barb 61 on the first slider 6 are unlocked, the first slider 6 moves forward under the pushing of the first firing spring 7, the unlocking firing of the first slider 6 and the needle tube 2 is completed, and the needle tube 2 moves forward to retract the sampling slot of the needle core 1 into the front end thereof; at the same time, the firing link 13 is engaged by the relative movement of the second chute retaining section 1332 of its second chute 133 and the second connecting post 231 on the second firing block 23 to hold the first firing block 16 stationary.

Finally, the back firing button 131 and the side firing button 17 are released, as shown in fig. 16, the firing link 13 moves backward to reset under the pushing of the reset spring 18, and the firing link 13 drives the first firing block 16 and the second firing block 23 to move upward to reset through the first chute 136 and the second chute 133, respectively.

The winding firing process/method for non-full-stroke sampling of the biopsy device comprises the following steps:

1) Adjusting the sampling stroke;

the sampling stroke button 15 is pushed, the sampling stroke button 15 enters a locking state from an unlocking state and is positioned in the locking state by a positioning structure, and at this time, a hooking boss 151 on the sampling stroke button 15 is provided on the forward and backward moving path of the first elastic barb 61 of the first slider 6.

2) Winding up;

pressing the first winding button 14 and the second winding button 19, respectively; the first slider 6 is driven by the first winding button 14 to move backwards to compress the first trigger spring 7 until the first elastic barb 61 on the first slider 6 is locked with the hooking boss 151 on the sampling travel button 15, and the first slider 6 and the needle tube 2 finish winding, as shown in fig. 17; the second slider 10 is driven to move backwards through the second winding button 19 to compress the second firing spring 11 until the second elastic barb 101 on the second slider 10 is locked with the second firing block 23, and the second slider 10 and the needle core 1 finish winding; at this time, the safety button 12 preferably locks the firing link 13 to avoid false firing.

3) Opening the insurance;

The safety button 12 is opened to release the lock on the firing link 13.

4) Firing;

Firstly, the firing connecting rod 13 cooperates with the second connecting post 231 on the second firing block 23 through the relative movement of the second chute lifting section 1331 in the second chute 133, so as to drive the second firing block 23 to move downwards, further, the second firing block 23 is unlocked with the second elastic barb 101 on the second slider 10, the second slider 10 moves forwards under the pushing of the second firing spring 11, and the unlocking firing of the second slider 10 and the needle core 1 is completed; at this time, the sampling stroke button 15 is kept in a locked state, and a part of the sampling groove of the needle core 1 is exposed from the tip of the needle tube 2.

Then, as the firing connecting rod 13 continues to move forward, the pushing part 138 at the front end of the firing connecting rod 13 unlocks the positioning structure of the sampling travel button 15, the sampling travel button 15 returns to the unlocking state from the locking state under the drive of the restoring elastic force of the elastic body 21, the hooking boss 151 of the sampling travel button 15 is unlocked with the first elastic barb 61 of the first slider 6, the first slider 6 moves forward under the pushing of the first firing spring 7, the unlocking firing of the first slider 6 and the needle tube 2 is completed, and the needle tube 2 moves forward to retract the sampling slot of the needle core 1 into the front end of the sampling slot; at the same time, the firing link 13 is engaged by the relative movement of the second chute retaining section 1332 of its second chute 133 and the second connecting post 231 on the second firing block 23 to hold the first firing block 16 stationary.

Finally, the back firing button 131 and the side firing button 17 are released, the firing link 13 moves backwards to reset under the pushing of the reset spring 18, and the firing link 13 drives the first firing block 16 and the second firing block 23 to move upwards to reset through the first chute 136 and the second chute 133 respectively.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The biopsy device comprises a needle core (1), a needle tube (2) and an operating handle for controlling the needle tube of the needle core to carry out biopsy sampling, and is characterized in that the operating handle comprises a mounting frame, a first sliding block (6), a first firing spring (7), a second sliding block (10) and a second firing spring (11) are arranged in the mounting frame, the rear end of the needle tube (2) is fixedly connected with the first sliding block (6), the rear end of the needle tube (1) penetrates through the needle tube (2) and the first sliding block (6) and then is fixedly connected with the second sliding block (10), the front end of the first firing spring (7) is propped against the first sliding block (6), the rear end of the first firing spring (7) is propped against the mounting frame, the front end of the second firing spring (11) is propped against the second sliding block (10), and the rear end of the second firing spring (11) is propped against the mounting frame; the mounting frame is also provided with a winding firing mechanism for driving the first sliding block (6) and the second sliding block (10) to move backwards and position and compressing the first firing spring (7) and the second firing spring (11) to store potential, and a firing unlocking mechanism for releasing the positioning of the first sliding block (6) and/or the second sliding block (10);

The winding firing mechanism comprises a first winding button (14), a second winding button (19), a first firing block (16) and a second firing block (23), wherein the first winding button (14) is connected with the first slider (6) and can drive the first slider (6) to move backwards, a first elastic barb (61) is arranged on the first slider (6), after the first slider (6) moves backwards in place, the first elastic barb (61) is hooked and locked with the first firing block (16), the second winding button (19) is connected with the second slider (10) and can drive the second slider (10) to move backwards, a second elastic barb (101) is arranged on the second slider (10), and after the second slider (10) moves backwards in place, the second elastic barb (101) is hooked and locked with the second firing block (23), and the first firing block (16) and the second firing block (23) are respectively and movably connected with the mounting frame;

the firing unlocking mechanism comprises a firing connecting rod (13), wherein the firing connecting rod (13) is arranged on the mounting frame and can move back and forth, the firing connecting rod (13) is movably connected with the first firing block (16) and can drive the first firing block (16) to be unlocked with the first elastic barb (61), and the firing connecting rod (13) is movably connected with the second firing block (23) and can drive the second firing block (23) to be unlocked with the second elastic barb (101).

2. The biopsy device according to claim 1, wherein the mounting frame comprises a first mounting frame (8) and a second mounting frame (22) which are fixed in a left-right fit manner, a handle shell is fixed outside the mounting frame, the handle shell comprises a first shell (4) and a second shell (20) which are fixed in a left-right fit manner, the first shell (4) and the second shell (20) are fixedly connected through a fastener, the first mounting frame (8) and the second mounting frame (22) are fixedly connected through a fastener, and the mounting frame and the handle shell are fixed in a fit manner through a positioning column and a positioning groove; a sleeve (3) is fixed at the front end of the handle shell, and the needle core (1) and the needle tube (2) penetrate through the sleeve (3).

3. A biopsy device according to claim 2, wherein a first winding button (14) and a second winding button (19) are arranged at the front end of the handle housing and side by side left and right, wherein an extension arm of the first winding button (14) extending into the handle housing is connected with the first slider (6) to be able to push the first slider (6) backwards, an extension arm of the second winding button (19) extending into the handle housing is connected with the second slider (10) to be able to push the second slider (10) backwards, and extension arms of the first winding button (14) and the second winding button (19) are arranged on the left and right sides of the mounting frame, respectively.

4. A biopsy device according to claim 1, wherein the firing link (13) is pushed by a back firing button (131) or a side firing button (17), the back firing button (131) or the side firing button (17) being integrally formed or fixedly fitted with the firing link (13).

5. The biopsy device according to claim 1, further comprising a safety button (12), wherein the safety button (12) and the firing link (13) are locked and fixed by the locking portion (121) and the locking groove (132) being engaged, and the firing link (13) is unlocked by moving the safety button (12) such that the locking portion (121) and the locking groove (132) are disengaged.

6. A biopsy device according to claim 1, wherein the front end of the first slider (6) is provided with a first shock absorbing washer (5) and the front end of the second slider (10) is provided with a second shock absorbing washer (9).

7. A biopsy device according to claim 1, wherein the front part of the mounting frame is provided with a first slide (83), the first slide (6) and the first firing spring (7) are mounted in the first slide (83), the rear part of the mounting frame is provided with a second slide (81), the second slide (10) and the second firing spring (11) are mounted in the second slide (81), and the front end of the first slide (83), the rear end of the second slide (81) and the first slide (83) and the second slide (81) are provided with blocking parts, whereby the first slide (6) is restricted to slide in the first slide (83) and the second slide (10) is restricted to slide in the second slide (81); a third slide way (88) and a fourth slide way (85) are arranged on the mounting frame, the third slide way (88) is communicated with the first slide way (83), the third slide way (88) is provided with a front side wall and a rear side wall so as to limit the front-back movement of the first striking block (16), the first striking block (16) slides up and down along the third slide way (88), and one end of the first striking block (16) is close to or far away from the first slide way (83) to realize locking and unlocking with a first elastic barb (61) on the first sliding block (6); the fourth slide way (85) is communicated with the second slide way (81), the fourth slide way (85) is provided with a front side wall and a rear side wall so as to limit the second firing block (23) to move back and forth, the second firing block (23) slides up and down along the fourth slide way (85), and one end of the second firing block (23) is close to or far away from the second slide way (81) to realize locking and unlocking of a second elastic barb (101) on the second slide block (10).

8. The biopsy device of claim 7, wherein the firing link (13) is cooperatively coupled to the first connecting post (161) via a first chute (136) to move the first firing block (16) up and down, and wherein the firing link (13) is cooperatively coupled to the second connecting post (231) via a second chute (133) to move the second firing block (23) up and down, wherein the first chute (136) comprises a first chute retaining section (1361) that does not move the first firing block (16) up and down and a first chute lifting section (1362) that does not move the first firing block (16) up and down, and wherein the second chute (133) comprises a second chute retaining section (1332) that does not move the second firing block (23) up and down and a second chute lifting section (1331) that does move the second firing block (23) up and down; when the firing connecting rod (13) moves forwards or backwards to perform firing, the second firing block (23) is driven to move at first, so that the second sliding block (10) connected with the needle core (1) is driven to unlock the firing, and then the first firing block (16) is driven to move, so that the first sliding block (6) connected with the needle tube (2) is driven to unlock the firing.

9. A biopsy device according to claim 1, wherein the firing bar (13) is provided with a return portion (134), the return portion (134) being provided with a return spring (18) between the mounting frame; the mounting frame is provided with a reset spring space (87) and a fifth slide way (86), the reset spring (18) is limited in the reset spring space (87), the rear end of the reset spring space (87) is communicated with the fifth slide way (86), a reset part (134) on the firing connecting rod (13) is inserted in the fifth slide way (86) and can move back and forth, when the firing connecting rod (13) moves forward, the front end of the reset spring (18) is propped against the mounting frame, and the rear end of the reset spring (18) is propped against the reset part (134) on the firing connecting rod (13).

10. The biopsy device of claim 1, further comprising a sampling travel adjustment mechanism comprising a sampling travel button (15), the sampling travel button (15) having a hooking boss (151) and a recess (154) for avoiding, wherein moving the sampling travel button (15) can place the hooking boss (151) or the recess (154) on the first slider (6) in the forward and backward movement path of the first elastic barb (61); when the sampling travel button (15) is in a locking state, when the hooking boss (151) is arranged on the front-back moving path of the first elastic barb (61), the first elastic barb (61) can be hooked and positioned with the hooking boss (151) to realize winding locking, at the moment, the first sliding block (6) is locked, and only part of the sampling groove of the needle core (1) can be exposed out of the needle tube (2) to realize non-full-travel sampling; When the sampling stroke button (15) is in an unlocking state, the avoidance groove (154) is arranged on the front-back moving path of the first elastic barb (61), the first elastic barb (61) can freely pass through and is not blocked, the first elastic barb (61) can be hooked and positioned with the first trigger block (16) so as to realize winding locking, at the moment, the first sliding block (6) is locked, and all sampling grooves of the needle core (1) can be exposed out of the needle tube (2) so as to realize full-stroke sampling; the sampling travel button (15) is connected with an elastic body (21) for returning the sampling travel button (15) from a locking state to an unlocking state, the movable end of the elastic body (21) is connected with the sampling travel button (15), the fixed end of the elastic body (21) is connected with a mounting frame or a handle shell, the sampling travel button (15) is provided with a positioning structure for positioning the sampling travel button (15) in the locking state, and the positioning structure can be driven by the firing connecting rod (13) to release positioning so that the sampling travel button (15) can be returned to the unlocking state from the locking state under the driving of the elastic body (21); the positioning structure comprises a first arm (152) and a second arm (155), fixed ends of the first arm (152) and the second arm (155) are fixedly connected with one end of a sampling stroke button (15) or integrally formed, a gap is reserved between the first arm (152) and the second arm (155), free ends of the first arm and the second arm can approach each other and elastically return, the second arm (155) is longer than the first arm (152), a first clamping hook (153) is formed on one side, far away from the second arm (155), of the free end of the first arm (152), and a clamping hole (221) for the first arm (152) and the second arm (155) to be inserted is formed in the mounting frame; When the sampling travel button (15) is in a locking state, the free ends of the first arm (152) and the second arm (155) both pass through the clamping hole (221), and the first clamping hook (153) on the first arm (152) is clamped with the clamping hole (221) so as to position the sampling travel button (15) in the locking state; during firing, the pushing part (138) arranged at the front part of the firing connecting rod (13) pushes the free end of the first arm (152) to enable the first clamping hook (153) to be separated from the clamping hole (221) on the mounting frame and to be released from positioning, so that the sampling stroke button (15) is driven by the restoring elastic force of the elastic body (21) to restore to the unlocking state from the locking state, and the free end of the first arm (152) is withdrawn from the clamping hole (221).