Biopsy device, sampling stroke adjustment mechanism and winding and firing method thereof

Abstract

The present invention discloses a biopsy device and a sampling stroke adjustment mechanism and a winding firing method thereof. The sampling stroke adjustment mechanism includes a mounting frame, a first slider, a first firing spring, a second slider and a second firing spring, and a firing connecting rod for releasing the locking and positioning of the first slider and / or the second slider, and a sampling stroke adjustment component. The sampling stroke adjustment component can move and has at least two states: a locked state and an unlocked state. When the sampling stroke adjustment component is in a locked state, the first elastic barb can be hooked and positioned with a hooking boss to achieve winding locking. When the first slider is locked in this position, only a part of the sampling groove of the needle core can be exposed from the needle tube so that non-full stroke sampling can be implemented; when the sampling stroke adjustment component is in an unlocked state, the hooking boss leaves the forward and backward moving path of the first elastic barb on the first slider, and the first elastic barb can pass freely without obstruction. The stroke adjustment of this solution is simple and convenient, and the operation is convenient.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to a biopsy device for sampling living tissue, and in particular to a multifunctional fully automatic biopsy device and a sampling stroke adjustment mechanism and a winding and firing method thereof. Background Art

[0002] The biopsy device is a medical device that is suitable for sampling living tissue and aspirating cells from various organs such as the liver, kidney, lung, prostate, breast, thyroid, etc. It has the characteristics of simple and fast operation, easy use, and rapid sampling.

[0003] Since Bard of the United States developed and sold biopsy needles relatively early and occupied a dominant position in the market, Japan's TSK also launched fully automatic biopsy needles after Bard, giving doctors more choices in clinical practice. Fully automatic biopsy needles can be operated with one hand, with little difficulty in winding, two firing triggers in front and back, and two gripping methods: horizontal grip and vertical grip, which are convenient for doctors to choose according to actual conditions. They are easy and fast to operate, with rapid sampling and low risk, and have received praise from many clinicians.

[0004] Patent document with publication number CN104797200 discloses a biopsy device, which discloses a biopsy device, including a cutting cannula mechanism having a cutting cannula and an internal stylet mechanism having an internal stylet, which is coaxial with the cutting cannula. The firing mechanism is configured to fire the cutting cannula mechanism and the internal stylet mechanism by causing each cutting cannula and the internal stylet to retreat to a firing position in a proximal direction. The trigger device is configured to fire at least one of the internal stylet mechanism and the cutting cannula mechanism so as to cause the corresponding at least one of the internal stylet and the cutting cannula to advance from the firing position in a distal direction. The selector assembly includes a selector switch having an external protrusion accessible by a user. The selector assembly is configured to select between at least two user-selectable operating modes and at least two user-selectable firing distances.

[0005] However, the biopsy devices currently on the market also have certain defects, such as: the firing device is not reliable, and there may be situations where it cannot be fired or is difficult to fire; the firing device is not designed with a safety button, which is prone to misfiring; the inner and outer needles are fired in conjunction, and customers report that the sampling effect is not ideal; and the fully automatic needle cannot be wound up with one hand, and needs to be wound up with both hands, which is cumbersome to operate; the product has only one firing position / firing button, and cannot be held horizontally, which is inconvenient to use, etc. In addition, there is generally only one sampling stroke (full-stroke sampling or full-slot sampling). When only a small amount of tissue needs to be sampled, it is necessary to replace the biopsy device with a shorter sampling stroke, which causes inconvenience in use and increases the cost of use. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a biopsy device and a sampling stroke adjustment mechanism and a winding and firing method thereof, which are simple and convenient to adjust the stroke and easy to operate.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0008] A sampling stroke adjustment mechanism of a biopsy device comprises a mounting frame, wherein a first slider (6), a first firing spring (7), a second slider (10) and a second firing spring (11) are arranged in the mounting frame, the first slider (6) is fixedly connected to the rear end of a needle tube (2), the front end of the first firing spring (7) abuts against the first slider (6), the rear end of the first firing spring (7) abuts against the mounting frame, the first slider (6) is provided with a first elastic barb (61), and after the first slider (6) moves backward into position, the first elastic barb (61) abuts against a first elastic barb arranged on the mounting frame. The first locking portion (85) on the frame is hooked and locked to achieve winding; the second slider (10) is fixedly connected to the rear end of the needle core (1), the front end of the second firing spring (11) is against the second slider (10), and the rear end of the second firing spring (11) is against the mounting frame. The second slider (10) is provided with a second elastic hook (101). After the second slider (10) moves backward into position, it is hooked and locked with the second locking portion (88) provided on the mounting frame through the second elastic hook (101) to achieve winding; wherein the first slider (6) and the second slider The blocks (10) are respectively connected to the mounting frame for front and rear sliding movement, and the two are arranged one in front of the other; it is characterized in that it also includes a firing link (13) for releasing the locking position of the first slider (6) and / or the second slider (10), and a sampling stroke adjustment component (15), the sampling stroke adjustment component (15) is provided with a hooking boss (151), the sampling stroke adjustment component (15) is movable and has at least two states, a locked state and an unlocked state. When the sampling stroke adjustment component is in the locked state, the hooking boss (151) is arranged on the first slider. On the forward and backward moving path of the first elastic barb (61) on the block (6), the first elastic barb (61) can be hooked and positioned with the hooking boss (151) to achieve winding locking. When the first slider (6) is locked in this position, only a part of the sampling groove of the needle core (1) can be exposed from the needle tube (2), so that non-full stroke sampling can be implemented; when the sampling stroke adjustment component is in the unlocked state, the hooking boss (151) leaves the forward and backward moving path of the first elastic barb (61) on the first slider (6), and the first elastic barb (61) can pass freely without obstruction. In this way, the winding locking position of the first slider can be selected by adjusting the pressing stroke of the first winding button, so as to achieve the adjustment of the sampling stroke (sampling amount) of the biopsy device, without the need for manual operation of the sampling stroke button for pre-setting, and the structure is simple and reasonable, and the operation is convenient and reliable.

[0009] Preferably, the firing link (13) is provided with a first firing portion (133) and a second firing portion (136), and the first firing portion (133) and the second firing portion (136) are both sloped. Correspondingly, the first elastic barb (61) and the second elastic barb (101) are also provided with slopes matching the first firing portion (133) and the second firing portion (136), respectively. When the firing link (13) moves forward and backward to fire, the second firing portion (136) first pushes the second elastic barb (101) on the second slider (10) to cause it to elastically contract and deform and separate from the second locking portion (88), thereby unlocking the second slider (10) connected to the needle core (1) for firing, and then the first firing portion (133) pushes the first elastic barb (61) of the first slider (6) to cause it to elastically contract and deform and separate from the first locking portion (85), thereby unlocking the first slider (6) connected to the needle tube (2) for firing.

[0010] Preferably, the sampling stroke adjustment component (15) is hinged to the mounting frame and can swing up and down. The sampling stroke adjustment component (15) has a hooking boss (151) and a releasing portion (152). An elastic member (16) causes the sampling stroke adjustment component (15) to rotate and enables the hooking boss (151) to enter the forward and backward movement path of the first elastic barb (61) on the first slider (6); the first elastic barb (61) of the first slider (6) moves backward to engage with the hooking boss (151). The first slider (151) is hooked and positioned to achieve the locking of the upper string. When the first slider (6) is locked in this position, only a part of the sampling groove of the needle core (1) can be exposed from the needle tube (2). A pushing portion (137) is provided at the front end of the firing rod (13). When the firing rod (13) moves forward, the pushing portion (137) abuts against the release portion (152) and can cause the sampling stroke adjustment component (15) to rotate, thereby causing the hooking boss (151) to withdraw from the forward and backward moving path of the first elastic barb (61).

[0011] Preferably, the pushing portion (137) is located on one side of the first firing portion (133), and the contact surface between the pushing portion (137) and the releasing portion (152) is a slope or an arc surface, and the contact surface between the releasing portion (152) and the pushing portion (137) is a slope or an arc surface.

[0012] Preferably, the pushing portion (137) and the first locking portion (85) are respectively located on the left and right sides of the first firing portion (133), the pushing portion (137) is located on the left or right side of the forward and backward moving path of the first elastic barb (61), and the width of the free end of the first elastic barb (61) is greater than the width of the pushing portion (137).

[0013] Preferably, the sampling stroke adjustment component (15) is in the shape of a rod extending forward and backward, and a hinge portion (153) is provided on the left and right sides of the sampling stroke adjustment component (15), and the hinge portion (153) is inserted into a hinge hole (89) on the mounting frame to realize the hinge connection between the sampling stroke adjustment component (15) and the mounting frame. The elastic member (16) is a torsion spring sleeved on the hinge portion (153), one end of the torsion spring is against the mounting frame, and the other end of the torsion spring is against the front end of the sampling stroke adjustment component (15), and the release portion (152) is located at the rear end of the sampling stroke adjustment component (15).

[0014] Preferably, a first slideway (81) is arranged at the front of the mounting frame, the first slider (6) and the first firing spring (7) are installed in the first slideway (81), a second slideway (83) is arranged at the rear of the mounting frame, the second slider (10) and the second firing spring (11) are installed in the second slideway (83), and blocking parts are arranged at the front end of the first slideway (81), the rear end of the second slideway (83), and between the first slideway (81) and the second slideway (83), so that the first slider (6) is restricted to slide in the first slideway (81), and the second slider (10) is restricted to slide in the second slideway (83); the first locking part (85) is a protruding position, and the front side of the first locking part (85) is provided with a stopper for urging the first slider The first elastic hook (61) on the second slider (10) generates an inclined surface that is elastically contracted and deformed, the rear side of the first locking portion (85) is a locking surface that can be locked with the free end of the first elastic hook (61), the second locking portion (88) is a protruding locking portion, and the front side of the second locking portion (88) is provided with an inclined surface for causing the second elastic hook (101) on the second slider (10) to generate an elastic contraction and deformation, and the rear side of the second locking portion 88 is a locking surface that can be locked with the free end of the second elastic hook (101); the first slideway (81) and the second slideway (83) are formed by the first mounting frame (8) and the second mounting frame (22), and the firing connecting rod (13) is formed along the first mounting frame (8) and the second mounting frame (22). The first firing portion (133) and the second firing portion (136) are arranged on one side of the firing link (13) close to the first slideway (81) and the second slideway (83); the first locking portion (85) is arranged on the first mounting frame (8) and / or the second mounting frame (22) and is located between the firing link (13) and the first slideway (81); the first locking portion (85) is located on one side or both sides of the first firing portion (133); the first elastic barb (61) is arranged on one side of the first slider (6) close to the firing link (13); the forward and backward movement path of the first elastic barb (61) passes through the first locking portion (85) and is aligned with the forward and backward movement path of the first firing portion (133). The second elastic barb (61) and the second elastic barb (101) are arranged on the first mounting frame (8) and / or the second mounting frame (22) and are located between the firing rod (13) and the second slideway (83). The second locking portion (88) is located on one side or both sides of the second firing portion (136). The second elastic barb (101) is arranged on the side of the second slideway (10) close to the firing rod (13). The forward and backward movement path of the second elastic barb (101) passes through the second locking portion (88) and partially overlaps with the forward and backward movement path of the second firing portion (136). The width of the free end of the second elastic barb (101) is greater than the width of the second firing portion (136).

[0015] Preferably, when the first slider (6) is in the locked state, the first locking portion (85) and the first firing portion (133) are respectively located at the front and rear sides of the free end of the first elastic hook (61); and when the second slider (10) is in the locked state, the second locking portion (88) and the second firing portion (136) are respectively located at the front and rear sides of the free end of the second elastic hook (101).

[0016] A biopsy device comprises a sampling stroke adjustment mechanism of the biopsy device as described above, wherein the mounting frame is also provided with a winding firing mechanism for driving a first slider (6) and a second slider (10) to move backwards and lock in position and compress a first firing spring (7) and a second firing spring (11) to accumulate momentum; the winding firing mechanism comprises a first winding button (14) and a second winding button (19), wherein the first winding button (14) is connected to the first slider (6) and can drive the first slider (6) to move backwards, and the second winding button (19) is connected to the second slider (10) and can drive the second slider (10) to move backwards.

[0017] The winding and firing method of the biopsy device as described above comprises the following steps:

[0018] 1) Winding up the watch;

[0019] The first winding button (14) and the second winding button (19) are pressed respectively; the first winding button (14) drives the first slider (6) to move backward to compress the first firing spring (7) until the first elastic barb (61) on the first slider (6) is locked with the hooking boss (151) on the sampling stroke adjustment component (15), and the first slider (6) and the needle tube (2) are completely wound; the second winding button (19) drives the second slider (10) to move backward to compress the second firing spring (11) until the second elastic barb (101) on the second slider (10) is locked, and the second slider (10) and the needle core (1) are completely wound;

[0020] 2) Firing;

[0021] Pressing the rear firing button (131) or pushing the side firing button (17) forward drives the firing link (13) to move forward;

[0022] First, the firing link (13) causes the second elastic barb (101) to produce elastic deformation and separate from the second locking portion (88) through the second firing portion (136), thereby releasing the second slider (10) from the locked state. The second slider (10) moves forward under the push of the second firing spring (11), completing the unlocking and firing of the second slider (10) and the needle core (1); at the same time, the first firing portion (133) and the pushing portion (137) of the firing link (13) do not contact the first elastic barb (61) on the first slider (6), maintaining the locked state of the first slider (6); in this way, part of the sampling groove of the needle core (1) is exposed from the front end of the needle tube (2);

[0023] Then, as the firing link (13) continues to move forward, the pushing portion (137) at the front end of the firing link (13) abuts against the releasing portion (152) and can cause the sampling stroke adjustment component (15) to rotate, thereby causing the hooking boss (151) to withdraw from the forward and backward moving path of the first elastic barb (61), so as to release the locking engagement of the hooking boss (151) with the first elastic barb (61), and the first slider (6) moves forward under the push of the first firing spring (7), completing the unlocking and firing of the first slider (6) and the needle tube (2), and the needle tube (2) moves forward to receive the sampling groove of the needle core (1) into its front end;

[0024] Finally, the rear firing button (131) and the side firing button (17) are released, and the firing connecting rod (13) moves backward and resets under the push of the reset spring (18), and the sampling stroke adjustment component (15) is reset under the action of the elastic member (16).

[0025] Since the present invention adopts the above technical scheme, the needle core and needle tube can be fired in sequence, and the tissue can fully fall into the inner needle sampling groove, the sampling effect is good, the structure is reasonable, the operation is convenient and comfortable, and it has certain cost advantages. The present invention is provided with a safety button, which can effectively prevent misoperation and make the sampling process safer. The present invention is provided with an adjustable sampling stroke, which can be suitable for diseased tissues of different sizes and can obtain tissue samples of different lengths. It not only has the advantages of wide application, but also can reduce damage to healthy tissues and effectively reduce the pain of patients. In addition, the present invention is provided with a shock-absorbing washer on the slider, which can buffer the impact force of the slider and reduce the fear of the patient caused by the working noise, and the user experience is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a stereogram of Example 1;

[0027] Figure 2 is an exploded view of Example 1;

[0028] Figure 3 It is a schematic diagram of the structure of the firing rod;

[0029] Figure 4 It is a schematic diagram of the matching structure of the firing connecting rod and the sampling stroke adjustment section;

[0030] Figure 5 is a schematic diagram of the matching structure of the first installation frame and related components;

[0031] Figure 6 is a schematic diagram of the matching structure of the first mounting frame, the firing connecting rod and related components;

[0032] Figure 7 It is a schematic diagram of the matching structure of two mounting frames, firing connecting rods and related parts (view point one);

[0033] Figure 8 is a schematic diagram of the matching structure of the second mounting frame, the firing connecting rod and related components;

[0034] Fig. 9 It is a schematic diagram of the matching structure of two mounting frames, firing rods and related components (viewpoint 2);

[0035] Fig.10 is a partial cross-sectional view of Embodiment 1 (safety button locked);

[0036] Fig.11 It is one of the upper string schematic diagrams of Example 1;

[0037] Fig.12 This is the second schematic diagram of the upper chord of Embodiment 1;

[0038] Fig.13 It is a partial cross-sectional view of the winding state of Example 1 (the safety button is opened and the full stroke is sampled);

[0039] Fig.14 It is one of the firing schematic diagrams of Example 1;

[0040] Fig.15 This is the second firing schematic diagram of Example 1;

[0041] Fig.16 is a structural schematic diagram of the firing state of Example 1 (firing rod reset);

[0042] Fig.17 It is one of the upper string schematic diagrams of non-full stroke sampling in Example 1;

[0043] Fig.18 This is the second schematic diagram of the upper string of non-full stroke sampling in Example 1;

[0044] Fig.19 is a schematic diagram of firing of non-full stroke sampling in Example 1;

[0045] Fig. 20 (a) is one of the full-stroke sampling schematics;

[0046] Fig. 20 (b) is the second schematic diagram of full-stroke sampling;

[0047] Fig. 20 (c) is the third schematic diagram of full-stroke sampling;

[0048] Fig.21 (a) is one of the non-full-stroke (half-stroke) sampling schematic diagrams;

[0049] Fig.21 (b) is the second schematic diagram of non-full-stroke (half-stroke) sampling;

[0050] Fig.21 (c) is the third schematic diagram of non-full-stroke (half-stroke) sampling.

[0051] Among them, 1, needle core, 2, needle tube, 3, sleeve, 4, first shell, 5, first shock-absorbing washer, 6, first slider, 61, first elastic barb, 62, first connecting part, 7, first firing spring, 8, first mounting frame, 81, first slide, 82, first long hole, 83, second slide, 84, second long hole, 85, first locking part, 86, fifth slide, 87, reset spring space, 88, second locking part, 89, hinge hole, 9, second shock-absorbing washer, 10, second slider, 101, second elastic barb, 102, second connecting part, 11, second firing spring Spring, 12, safety button, 13, firing rod, 131, rear firing button, 132, locking groove, 133, first firing part, 134, reset part, 135, connecting part, 136, second firing part, 137, pushing part, 14, first winding button, 15, sampling stroke adjustment component, 151, hooking boss, 152, releasing part, 153, hinged part, 16, elastic part, 17, side firing button, 171, limiting latch, 18, reset spring, 19, second winding button, 20, second shell, 22, second mounting frame, 220, positioning column. DETAILED DESCRIPTION

[0052] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] Embodiment 1:

[0058] For the convenience of expression and easy understanding, in this embodiment, the needle core sampling end is the front, the handle end is the rear, and the left and right directions and the up and down directions are defined respectively by the vertical front and back directions.

[0059] like Figure 1 and Figure 2A biopsy device shown in the figure comprises a needle core 1, a needle tube 2 and an operating handle for manipulating the needle core and needle tube for biopsy sampling, the operating handle comprising a mounting frame, in which a first slider 6, a first firing spring 7, a second slider 10 and a second firing spring 11 are arranged, the rear end of the needle tube 2 is fixedly connected to the first slider 6, the rear end of the needle core 1 passes through the needle tube 2 and the first slider 6 and is fixedly connected to the second slider 10, the front end of the first firing spring 7 abuts against the first slider 6, the rear end of the first firing spring 7 abuts against the mounting frame, the front end of the second firing spring 11 abuts against the second slider 10, and the rear end of the second firing spring 11 abuts against the mounting frame; the mounting frame is also provided with a winding firing mechanism for driving the first slider 6 and the second slider 10 to move backward and lock the position and compress the first firing spring 7 and the second firing spring 11 to accumulate potential, and a firing unlocking mechanism for releasing the locking position of the first slider 6 and / or the second slider 10.

[0060] The winding firing mechanism includes a first winding button 14 and a second winding button 19. The first winding button 14 is connected to the first slider 6 and can drive the first slider 6 to move backward. The first slider 6 is provided with a first elastic hook 61. After the first slider 6 moves backward into position, the first elastic hook 61 is used to hook and lock with a first locking portion 85 provided on the mounting frame to achieve winding. The second winding button 19 is connected to the second slider 10 and can drive the second slider 10 to move backward. The second slider 10 is provided with a second elastic hook 101. After the second slider 10 moves backward into position, the second elastic hook 101 is used to hook and lock with a second locking portion 88 provided on the mounting frame to achieve winding.

[0061] The firing unlocking mechanism includes a firing link 13, which is arranged on a mounting frame and can move forward and backward. The firing link 13 is provided with a first firing part 133 and a second firing part 136. The firing link 13 causes the first elastic barb 61 to generate elastic deformation and separate from the first locking part 85 through the first firing part 133, thereby releasing the first slider 6 from a locked state. The firing link 13 causes the second elastic barb 101 to generate elastic deformation and separate from the second locking part 88 through the second firing part 136, thereby releasing the second slider 10 from a locked state.

[0062] In this embodiment, Figure 2 As shown, the mounting frame includes a first mounting frame 8 and a second mounting frame 22 that are fixed in cooperation with each other on the left and right sides, and a handle housing is fixed on the outside of the mounting frame. The handle housing includes a first housing 4 and a second housing 20 that are fixed in cooperation with each other on the left and right sides, and the first housing 4 and the second housing 20 are fixedly connected by fasteners or buckles, and 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 positioning columns 220 and positioning grooves. This structure is simple and reasonable, easy to assemble, and cost-effective.

[0063] In this embodiment, the needle core 1 (for example, the rear end of the needle core) is provided with anti-slip and anti-slip features (for example, inner concave, outer convex, etc.), and the anti-slip features can firmly connect the needle core to the slider 10 (for example, bonding); the needle tube 2 (for example, the rear end of the needle tube) is provided with anti-slip and anti-slip features (for example, bell mouth, flange surface, etc.), and the anti-slip features can firmly connect the needle tube to the slider 6 (for example, bonding).

[0064] In this embodiment, a sleeve 3 is preferably fixed to the front end of the handle housing, and the needle core 1 and the needle tube 2 pass through the sleeve 3, so that the sleeve 3 can ensure the coaxiality of the needle core 1 and the needle tube 2 when they move.

[0065] In this embodiment, Figure 1 and Figure 2 As shown, the first winding button 14 and the second winding button 19 are arranged at the front end of the handle housing and arranged side by side on the left and right sides. The extension arm of the first winding button 14 extending into the handle housing is connected to the first slider 6 so as to be able to push the first slider 6 backwards. The extension arm of the second winding button 19 extending into the handle housing is connected to the second slider 10 so as to be able to push the second slider 10 backwards. The extension arm of the first winding button 14 and the extension arm of the second winding button 19 are respectively arranged on the left and right sides of the mounting frame. In this way, pressing the two winding buttons can independently wind up the needle core and the needle tube, which is convenient to operate, has a reasonable structure, and the winding and firing action is reliable and stable.

[0066] like Figure 7 and Fig. 9As shown, preferably, the first slider 6 is provided with a first connecting portion 62, which extends out of the first long hole 82 on the mounting frame and is connected to the extension arm of the first winding button 14. When the first slider 6 moves forward and backward, the first connecting portion 62 moves forward and backward along the first long hole 82; the second slider 10 is provided with a second connecting portion 102, which extends out of the second long hole 84 on the mounting frame and is connected to the extension arm of the second winding button 19. When the second slider 10 moves forward and backward, the second connecting portion 102 moves forward and backward along the second long hole 84. In this way, the structure is reasonable, easy to install, and reliable in connection. In other embodiments, the connecting portion can also 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 on the mounting frame. Preferably, the extension arm of the first winding button 14 cooperates with the first connecting portion 62 through a slot or a connecting hole to enable the first slider 6 to be pushed backward, and the extension arm of the second winding button 19 cooperates with the second connecting portion 102 through a slot or a connecting hole to enable the second slider 10 to be pushed backward. Further, the slot limits the connection portion from the front and rear sides, so that the winding button moves synchronously with the corresponding slider, so that the operator can intuitively understand whether the biopsy device is in the winding state to avoid repeated operations. In other embodiments, the extension arm of the winding button is connected to the corresponding slider only when the winding is pressed and the winding is implemented. After the winding is completed, the extension arm of the winding button is separated from the corresponding slider, and the slider and its needle core or needle tube are fired independently without driving the winding button to move together. In order to prevent the winding button from moving arbitrarily, a spring can be set in the handle housing to reset the winding button. The connecting portion can be cylindrical, square columnar or any other shape that can transmit force.

[0067] In this embodiment, Figures 5 to 9As shown, a first slide 81 is arranged at the front of the mounting frame, and the first slider 6 and the first firing spring 7 are installed in the first slide 81; a second slide 83 is arranged at the rear of the mounting frame, and the second slider 10 and the second firing spring 11 are installed in the second slide 83; blocking portions are arranged at the front end of the first slide 81, the rear end of the second slide 83, and between the first slide 81 and the second slide 83, so that the first slider 6 is restricted to slide in the first slide 81, and the second slider 10 is restricted to slide in the second slide 83. The mounting frame is provided with a first locking portion 85 and a second locking portion 88. The first locking portion 85 is a protruding position, and the front side of the first locking portion 85 is provided with a slope surface for causing the first elastic hook 61 on the first slider 6 to produce elastic contraction deformation, and the rear side of the first locking portion 85 is a clamping surface that can be engaged and locked with the free end of the first elastic hook 61. The second locking portion 88 is a protruding position, and the front side of the second locking portion 88 is provided with a slope surface for causing the second elastic hook 101 on the second slider 10 to produce elastic contraction deformation, and the rear side of the second locking portion 88 is a clamping surface that can be engaged and locked with the free end of the second elastic hook 101.

[0068] In this embodiment, Figure 3 and Figure 4 As shown, the firing link 13 is provided with a first firing portion 133 and a second firing portion 136, both of which are in a slope shape. Accordingly, the first elastic barb 61 and the second elastic barb 101 are also provided with slopes that match the first firing portion 133 and the second firing portion 136 respectively; when the firing link 13 moves forward and backward to perform firing, the second firing portion 136 first pushes the second elastic barb 101 on the second slider 10 to cause it to produce elastic contraction deformation and separate from the second locking portion 88, thereby unlocking the second slider 10 connected to the needle core 1 for firing, and then the first firing portion 133 pushes the first elastic barb 61 of the first slider 6 to cause it to produce elastic deformation and separate from the first locking portion 85, thereby unlocking the first slider 6 connected to the needle tube 2 for firing. In this way, the firing portion and the elastic barb cooperate through the slope, which is more labor-saving and smooth sliding. By setting the specific positions and slope shapes of the two firing parts on the firing rod, not only the linkage and sequential firing of the two sliders are achieved, but also the sequential firing intervals of the needle core and needle tube can be conveniently adjusted, thereby fully ensuring a good sampling effect. The structure is simple, the use is convenient, and the operation is reliable.

[0069] In this embodiment, Figure 5 , Figure 8As shown, a reset portion 134 is provided on the firing link 13, and a reset spring 18 is provided between the reset portion 134 and the mounting frame, so that after the firing link 13 moves and fires, the firing link 13 is reset by the reset spring 18. Preferably, a reset spring space 87 and a fifth slideway 86 are provided on the mounting frame, the reset spring 18 is confined in the reset spring space 87, the rear end of the reset spring space 87 is connected to the fifth slideway 86, the reset portion 134 on the firing link 13 is inserted in the fifth slideway 86 and can move forward and backward, when the firing link 13 moves forward, the front end of the reset spring 18 abuts against the mounting frame, and the rear end of the reset spring 18 abuts against the reset portion 134 on the firing link 13. In this way, not only can the firing link be quickly reset, but also the installation is convenient, the forward and backward guiding movement is stable and reliable, the movement and firing resistance of the firing link 13 is smaller, and the operator is convenient to operate.

[0070] In this embodiment, Figure 5 and Fig. 9 As shown, the first slide 81 and the second slide 83 are formed by the first mounting frame 8 and the second mounting frame 22, the firing rod 13 slides forward and backward along the slide groove formed between the first mounting frame 8 and the second mounting frame 22, the first firing portion 133 and the second firing portion 136 are arranged on the side of the firing rod 13 close to the first slide 81 and the second slide 83, the first locking portion 85 is arranged on the first mounting frame 8 and / or the second mounting frame 22 and is located between the firing rod 13 and the first slide 81, the first locking portion 85 is located on one side or both sides of the first firing portion 133, the first elastic barb 61 is arranged on the side of the first slider 6 close to the firing rod 13, and the forward and backward movement path of the first elastic barb 61 The second elastic barb 61 has a width greater than that of the first firing portion 133; the second locking portion 88 is disposed on the first mounting frame 8 and / or the second mounting frame 22 and is located between the firing link 13 and the second slideway 83; the second locking portion 88 is located on one side or both sides of the second firing portion 136; the second elastic barb 101 is disposed on the side of the second slider 10 close to the firing link 13; the front and rear moving path of the second elastic barb 101 passes through the second locking portion 88 and partially overlaps with the front and rear moving path of the second firing portion 136; the width of the free end of the second elastic barb 101 is greater than that of the second firing portion 136. In this way, it is not only convenient for the elastic barb to engage with the locking portion to lock and limit, but also convenient for the firing portion on the firing link to push the elastic barb to produce elastic contraction deformation to implement unlocking and firing, with a reasonable structure, convenient assembly, and reliable and stable operation.

[0071] In this embodiment, when the first slider 6 is in the locked state, the first locking portion 85 and the first firing portion 133 are respectively located at the front and rear sides of the free end of the first elastic barb 61, and when the second slider 10 is in the locked state, the second locking portion 88 and the second firing portion 136 are respectively located at the front and rear sides of the free end of the second elastic barb 101. This structure is simple and reasonable, the action is stable and reliable, the manufacturing and assembly are convenient, and the cost is low.

[0072] In this embodiment, a first shock-absorbing washer 5 is provided at the front end of the first slider 6. The first shock-absorbing washer 5 has the function of buffering the first slider 6 from hitting the front blocking part of the first slide 81, so as to reduce noise and improve service life; a second shock-absorbing washer 9 is provided at the front end of the second slider 10. The second shock-absorbing washer 9 has the function of buffering the second slider 10 from hitting the front blocking part of the second slide 83, so as to reduce noise and improve service life.

[0073] In this embodiment, Figure 3 to Figure 4 and Figures 6 to 9 As shown, 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 or fixedly matched with the firing link 13. Preferably, the rear firing button 131 is integrally formed at the rear end of the firing link 13, and the side firing button 17 is fixedly connected to the firing link 13 by plug-in matching. The side firing button 17 is limitedly matched with the handle housing through a limiting clamping protrusion 171 and realizes forward and backward guided movement. In this embodiment, a connecting portion 135 is provided on one side of the firing link 13, and a card slot that matches the plug-in sleeve of the connecting portion 135 is provided on the extension arm inserted into the handle housing of the side firing button 17, and a limiting clamping protrusion 171 is provided on the 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 limitedly matched with the handle housing by buckle.

[0074] In order to avoid the situation where the product hits the firing button and causes accidental firing after winding, a safety button 12 is also provided. The safety button 12 is inserted into the handle housing and passes through one side of the firing link 13. At least one end of the safety button 12 protrudes from the handle housing. The safety button 12 and the locking groove 132 on the firing link 13 cooperate to limit the position so as to lock and fix the firing link 13. By moving the safety button 12 to disengage from the locking groove 132, the firing link 13 is unlocked. In this embodiment, Figure 6 , Figure 7As shown, the safety button 12 moves up and down in the handle housing, and a guide piece is formed on the part of the safety button 12 inside the handle housing to facilitate the upward and downward movement guidance and limitation. A locking portion is provided on the safety button 12, and a corresponding locking groove 132 is provided on the firing link 13. When the safety button 12 is moved upward, the locking portion leaves the locking groove 132, and the firing link 13 can move forward and backward to implement firing. When the safety button 12 is moved downward, the locking portion is stuck in the locking groove 132 to achieve limit locking, and the firing link 13 cannot move forward and backward.

[0075] In order to adjust the sampling stroke and realize biopsy sampling of multiple sampling strokes on one biopsy device, a sampling stroke adjustment mechanism is also provided, such as Figure 4 and Figure 6 As shown, it includes a sampling stroke adjustment component 15, on which a hooking boss 151 is provided. The sampling stroke adjustment component can move and has at least two states: a locked state and an unlocked state. When the sampling stroke adjustment component is in the locked state, the hooking boss 151 is arranged on the front-to-back moving path of the first elastic barb 61 on the first slider 6, and the first elastic barb 61 can be hooked and positioned with the hooking boss 151 to achieve the winding lock. When the first slider 6 is locked in this position, only a part of the sampling groove of the needle core 1 can be exposed from the needle tube 2 so that non-full stroke sampling can be implemented; when the sampling stroke adjustment component is in the unlocked state, the hooking boss 151 leaves the front-to-back moving path of the first elastic barb 61 on the first slider 6, and the first elastic barb 61 can pass freely without hindrance.

[0076] In this embodiment, Figure 4 , Figure 6 and Figure 7 As shown, the sampling stroke adjustment component 15 is hinged to the mounting frame and can swing up and down. The sampling stroke adjustment component 15 has a hooking boss 151 and a releasing portion 152. An elastic member 16 causes the sampling stroke adjustment component 15 to rotate and allows the hooking boss 151 to enter the forward and backward moving path of the first elastic barb 61 on the first slider 6 (that is, the elastic member causes the sampling stroke adjustment component to return from the unlocked state to the locked state); Figure 17 to Figure 18 As shown, the first elastic barb 61 of the first slider 6 moves backward and hooks with the hooking boss 151 to achieve the upper string locking. When the first slider 6 is locked in this position, only part of the sampling groove of the needle core 1 can be exposed from the needle tube 2, so that non-full stroke (or half-stroke sampling) can be implemented; Fig.15 and Fig.19As shown, the front end of the firing link 13 is provided with a push portion 137. When the firing link 13 moves forward, the push portion 137 abuts against the release portion 152 and can cause the sampling stroke adjustment component 15 to rotate so as to make the hook boss 151 withdraw from the forward and backward moving path of the first elastic barb 61. In this way, when sampling is not performed in full stroke, the firing link 13 can release the locking of the first elastic barb 61 by the hook boss 151 to achieve the release and firing of the first slider 6. When sampling is performed in full stroke, the firing link 13 can prevent the first elastic barb 61 from contacting the hook boss 151 during the forward movement of the firing. In this way, the winding lock position of the first slider 6 can be selected by adjusting the pressing stroke of the first winding button 14, so as to adjust the sampling stroke (sampling volume) of the biopsy device, without the need for manual operation of the sampling stroke button for pre-setting, and the structure is simple and reasonable, and the operation is convenient and reliable.

[0077] The so-called "full stroke sampling", also called full slot sampling, means that all sampling slots of the needle core 1 puncture into the target sampling tissue to obtain biopsy samples. The specific process is as follows:

[0078] After the needle core 1 and the needle tube 2 are wound up, the sampling groove of the needle core 1 is completely received in the needle tube 2, and the front end of the needle core and the needle tube is punctured into the target sampling tissue 100, as shown in FIG. Fig. 20 As shown in (a); first, the needle core 1 is fired to penetrate the target sampling tissue 100, and all the sampling grooves on the needle core 1 are exposed outside the needle tube 2, and the target sampling tissue 100 fills all the sampling grooves, such as Fig. 20 (b); then firing the needle tube 2, the biopsy sample 301 is cut from the target punctured tissue 100 by the needle tube 2 and stored in the sampling groove of the needle core, as shown in FIG. Fig. 20 As shown in (c).

[0079] The "non-full stroke sampling" mentioned above, also called partial stroke sampling or half stroke sampling, is that a part of the sampling groove of the pointer core 1 punctures into the target sampling tissue to obtain a biopsy sample. The specific process is as follows:

[0080] After the needle core 1 and the needle tube 2 are wound up, the sampling groove of the needle core 1 is completely received in the needle tube 2, and the front end of the needle core and the needle tube is punctured into the target sampling tissue 100, as shown in FIG. Fig.21 As shown in (a); first, the needle core 1 is fired to penetrate the target sampling tissue 100, and part of the sampling groove on the needle core 1 (generally half the length of the full sampling groove) is exposed outside the needle tube 2, and the target sampling tissue 100 fills this part of the sampling groove, as shown in FIG. Fig.21 (b); then firing the needle tube 2, the biopsy sample 302 is cut from the target punctured tissue 100 by the needle tube 2 and stored in the sampling groove of the needle core, as shown in FIG. Fig.21 As shown in (c), the length of the biopsy sample 302 is significantly shorter than that of Fig. 20The biopsy samples sampled from the entire stroke in (c) can be adapted to meet different sampling volume requirements.

[0081] In this embodiment, Figures 4 to 6 As shown, the sampling stroke adjustment component 15 is in the shape of a rod extending forward and backward, and a hinge 153 is provided on the left and right sides of the sampling stroke adjustment component 15. The hinge 153 is inserted into the hinge hole 89 on the mounting frame to realize the hinge connection between the sampling stroke adjustment component 15 and the mounting frame. The elastic member 16 is a torsion spring sleeved on the hinge 153, one end of the torsion spring is against the mounting frame, and the other end of the torsion spring is against the front end of the sampling stroke adjustment component 15. The release portion 152 is located at the rear end of the sampling stroke adjustment component 15. This has a simple structure, reliable recovery, and convenient installation. In other embodiments, the elastic member 16 can also be a compression spring, a spring sheet, or a rubber member.

[0082] In this embodiment, Figures 4 to 7 As shown, the pushing portion 137 is located on one side of the first firing portion 133 to prevent the pushing portion 137 from contacting the first elastic barb 61 on the first slider 6; the contact surface between the pushing portion 137 and the release portion 152 is a slope or an arc surface, and the contact surface between the release portion 152 and the pushing portion 137 is a slope or an arc surface. Such a structure is simple and reasonable, the movement is stable and reliable, the unlocking is convenient, and the manufacturing cost is low. Further preferably, the pushing portion 137 and the first locking portion 85 are respectively located on the left and right sides of the first firing portion 133, the pushing portion 137 is located on the left or right side of the forward and backward moving path of the first elastic barb 61, and the width of the free end of the first elastic barb 61 is greater than the width of the pushing portion 137. Such a structure is more reasonable and more convenient to assemble.

[0083] In other embodiments, multiple sampling stroke adjustment components 15 may be provided to be suitable for obtaining biopsy specimens of different lengths.

[0084] When the above biopsy device is not in use, Fig.10 As shown, the first slider 6 and the second slider 10 are in an unwinding state, the sampling slot of the needle core 1 is received in the needle tube 2, the safety button 12 locks the firing rod 13, and the rear firing button 131 and the side firing button 17 cannot be pressed.

[0085] The above-mentioned winding and firing process / method for full-stroke sampling of the biopsy device includes the following steps:

[0086] 1) Winding up the watch;

[0087] like Fig.11 and Fig.12As shown, the first winding button 14 and the second winding button 19 are pressed respectively; the first winding button 14 drives the first slider 6 to move backward to compress the first firing spring 7 until the first elastic barb 61 on the first slider 6 is locked, and the first slider 6 and the needle tube 2 are completely wound; the second winding button 19 drives the second slider 10 to move backward to compress the second firing spring 11 until the second elastic barb 101 on the second slider 10 is locked, and the second slider 10 and the needle core 1 are completely wound; at this time, the safety button 12 is preferably used to lock the firing link 13 to avoid accidental firing.

[0088] 2) Open the insurance;

[0089] like Fig.13 As shown, the safety button 12 is opened to release the lock of the firing rod 13.

[0090] 3) Firing;

[0091] Pressing the rear firing button 131 or pushing the side firing button 17 forward drives the firing rod 13 to move forward;

[0092] First, if Fig.14 As shown, the firing link 13 causes the second elastic barb 101 to produce elastic deformation and separate from the second locking portion 88 through the second firing portion 136, thereby releasing the second slider 10 from the locked state. The second slider 10 moves forward under the push of the second firing spring 11, completing the unlocking and firing of the second slider 10 and the needle core 1; at the same time, the first firing portion 133 of the firing link 13 does not contact the first elastic barb 61 on the first slider 6, maintaining the locked state of the first slider 6; in this way, the sampling groove of the needle core 1 exposes the front end of the needle tube 2.

[0093] Then, as the firing link 13 continues to move forward, Fig.15 As shown, the firing link 13 causes the first elastic barb 61 to produce elastic deformation and separate from the first locking portion 85 through the first firing portion 133, thereby releasing the first slider 6 from the locked state. The first slider 6 moves forward under the push of the first firing spring 7, completing the unlocking and firing of the first slider 6 and the needle tube 2. The needle tube 2 moves forward to receive the sampling groove of the needle core 1 into its front end; at the same time, the pushing portion 137 of the firing link 13 abuts against the releasing portion 152 and causes the sampling stroke adjusting component 15 to rotate, thereby causing the hooking boss 151 to withdraw from the forward and backward moving path of the first elastic barb 61, so as to avoid the first elastic barb 61 from contacting the hooking boss 151 during the forward movement of firing.

[0094] Finally, release the rear firing button 131 and the side firing button 17. Fig.16 As shown, the firing rod 13 is pushed backward and reset by the reset spring 18 , and the sampling stroke adjustment component 15 is reset by the elastic member 16 .

[0095] The winding and firing process / method of the above-mentioned biopsy device for non-full-stroke sampling includes the following steps:

[0096] 1) Non-full-stroke winding;

[0097] The first winding button 14 and the second winding button 19 are pressed respectively; the first winding button 14 drives the first slider 6 to move backward to compress the first firing spring 7 until the first elastic barb 61 on the first slider 6 is locked with the hooking boss 151 on the sampling stroke adjustment component 15, and the first slider 6 and the needle tube 2 are wound up. Fig.17 The second slider 10 is moved backward by 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, and the second slider 10 and the needle core 1 are wound, as shown in FIG. Fig.18 As shown; at this time, the safety button 12 preferably locks the firing rod 13 to avoid accidental firing.

[0098] 2) Open the insurance;

[0099] Open the safety button 12 to release the lock on the firing rod 13.

[0100] 3) Firing;

[0101] Pressing the rear firing button 131 or pushing the side firing button 17 forward drives the firing rod 13 to move forward;

[0102] First, the firing link 13 causes the second elastic barb 101 to produce elastic deformation and separate from the second locking portion 88 through the second firing portion 136, thereby releasing the second slider 10 from the locked state. The second slider 10 moves forward under the push of the second firing spring 11, completing the unlocking and firing of the second slider 10 and the needle core 1; at the same time, the first firing portion 133 and the pushing portion 137 of the firing link 13 do not contact the first elastic barb 61 on the first slider 6, maintaining the locked state of the first slider 6; in this way, part of the sampling groove of the needle core 1 is exposed from the front end of the needle tube 2.

[0103] Then, if Fig.19 As shown, as the firing link 13 continues to move forward, the pushing portion 137 at the front end of the firing link 13 abuts against the releasing portion 152 and can prompt the sampling stroke adjustment component 15 to rotate, thereby causing the hooking boss 151 to withdraw from the forward and backward moving path of the first elastic barb 61 to release the locking engagement of the hooking boss 151 on the first elastic barb 61. The first slide block 6 moves forward under the push of the first firing spring 7, completing the unlocking and firing of the first slide block 6 and the needle tube 2. The needle tube 2 moves forward to retract the sampling groove of the needle core 1 into its front end.

[0104] Finally, the rear firing button 131 and the side firing button 17 are released, and the firing link 13 moves backward and resets under the push of the reset spring 18, and the sampling stroke adjustment component 15 is reset under the action of the elastic member 16. Fig.16 shown.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sampling stroke adjustment mechanism of a biopsy device, comprising a mounting frame, wherein a first slider (6), a first firing spring (7), a second slider (10) and a second firing spring (11) are arranged in the mounting frame, wherein the first slider (6) is fixedly connected to the rear end of a needle tube (2), the front end of the first firing spring (7) abuts against the first slider (6), the rear end of the first firing spring (7) abuts against the mounting frame, the first slider (6) is provided with a first elastic barb (61), and after the first slider (6) moves backward into position, the first elastic barb (61) is used to adjust the sampling stroke of the biopsy device, wherein the first slider (6) is fixedly connected to the rear end of a needle tube (2), the front end of the first firing spring (7) abuts against the first slider (6), the rear end of the first firing spring (7) abuts against the mounting frame, the first slider (6) is provided with a first elastic barb (61), and the first slider (6) is moved backward into position through the first elastic barb (61) ) is hooked and locked with a first locking portion (85) provided on the mounting frame to achieve winding; the second slider (10) is fixedly connected to the rear end of the needle core (1), the front end of the second firing spring (11) is against the second slider (10), the rear end of the second firing spring (11) is against the mounting frame, and a second elastic barb (101) is provided on the second slider (10). After the second slider (10) moves backward into position, it is hooked and locked with a second locking portion (88) provided on the mounting frame through the second elastic barb (101) to achieve winding; wherein, The first slide block (6) and the second slide block (10) are respectively connected to the mounting frame in a forward and backward sliding manner and are arranged one in front of the other; the invention is characterized in that it also includes a firing link (13) for releasing the locking position of the first slide block (6) and / or the second slide block (10), and a sampling stroke adjustment component (15), wherein a hooking boss (151) is provided on the sampling stroke adjustment component (15), and the sampling stroke adjustment component (15) is movable and has at least two states, a locked state and an unlocked state. When the sampling stroke adjustment component is in the locked state, the hooking boss (151) is released. 1) is arranged on the forward and backward movement path of the first elastic barb (61) on the first slider (6), the first elastic barb (61) can be hooked and positioned with the hooking boss (151) to achieve winding locking, when the first slider (6) is locked, only a part of the sampling groove of the needle core (1) can be exposed from the needle tube (2), so that non-full stroke sampling can be implemented; when the sampling stroke adjustment component is in an unlocked state, the hooking boss (151) leaves the forward and backward movement path of the first elastic barb (61) on the first slider (6), and the first elastic barb (61) can freely pass without obstruction.

2. The sampling stroke adjustment mechanism of a biopsy device according to claim 1, characterized in that: A first firing portion (133) and a second firing portion (136) are provided on the firing link (13), and the first firing portion (133) and the second firing portion (136) are both in a slope shape. Correspondingly, the first elastic barb (61) and the second elastic barb (101) are also provided with slopes matching the first firing portion (133) and the second firing portion (136) respectively. When the firing link (13) moves forward and backward to fire, the second firing portion (136) first pushes the second elastic barb (101) on the second slider (10) to cause it to elastically contract and deform and separate from the second locking portion (88), thereby unlocking the second slider (10) connected to the needle core (1) for firing. Then, the first firing portion (133) pushes the first elastic barb (61) of the first slider (6) to cause it to elastically contract and deform and separate from the first locking portion (85), thereby unlocking the first slider (6) connected to the needle tube (2) for firing.

3. The sampling stroke adjustment mechanism of the biopsy device according to claim 2, characterized in that: The sampling stroke adjustment component (15) is hinged to the mounting frame and can swing up and down. The sampling stroke adjustment component (15) has a hooking boss (151) and a releasing portion (152). An elastic member (16) causes the sampling stroke adjustment component (15) to rotate and enables the hooking boss (151) to enter the forward and backward movement path of the first elastic barb (61) on the first sliding block (6); the first elastic barb (61) of the first sliding block (6) moves backward to engage with the hooking boss (151). The first slider (151) is hooked and positioned to achieve the locking of the winding. When the first slider (6) is locked, only a part of the sampling groove of the needle core (1) can be exposed from the needle tube (2). The front end of the firing rod (13) is provided with a pushing portion (137). When the firing rod (13) moves forward, the pushing portion (137) abuts against the release portion (152) and can cause the sampling stroke adjustment component (15) to rotate, thereby causing the hooking boss (151) to withdraw from the forward and backward movement path of the first elastic barb (61).

4. The sampling stroke adjustment mechanism of the biopsy device according to claim 3, characterized in that: The pushing portion (137) is located on one side of the first firing portion (133); a contact surface between the pushing portion (137) and the release portion (152) is a slope or an arc surface; and a contact surface between the release portion (152) and the pushing portion (137) is a slope or an arc surface.

5. The sampling stroke adjustment mechanism of the biopsy device according to claim 3, characterized in that: The pushing portion (137) and the first locking portion (85) are respectively located on the left and right sides of the first firing portion (133); the pushing portion (137) is located on the left or right side of the forward and backward moving path of the first elastic barb (61); and the width of the free end of the first elastic barb (61) is greater than the width of the pushing portion (137).

6. The sampling stroke adjustment mechanism of the biopsy device according to claim 3, characterized in that: The sampling stroke adjustment component (15) is in the shape of a rod extending forward and backward. The left and right sides of the sampling stroke adjustment component (15) are provided with hinged parts (153). The hinged parts (153) are inserted into hinged holes (89) on the mounting frame to achieve hinged connection between the sampling stroke adjustment component (15) and the mounting frame. The elastic member (16) is a torsion spring sleeved on the hinged part (153). One end of the torsion spring abuts against the mounting frame, and the other end of the torsion spring abuts against the front end of the sampling stroke adjustment component (15). The release part (152) is located at the rear end of the sampling stroke adjustment component (15).

7. The sampling stroke adjustment mechanism of the biopsy device according to claim 3, characterized in that: A first slideway (81) is arranged at the front of the mounting frame, and the first slider (6) and the first firing spring (7) are installed in the first slideway (81); a second slideway (83) is arranged at the rear of the mounting frame, and the second slider (10) and the second firing spring (11) are installed in the second slideway (83); a blocking portion is arranged at the front end of the first slideway (81), the rear end of the second slideway (83), and between the first slideway (81) and the second slideway (83), so that the first slider (6) is restricted from sliding in the first slideway (81), and the second slider (10) is restricted from sliding in the second slideway (83); the first locking portion (85) is a protruding stop, and a locking portion is arranged at the front side of the first locking portion (85) for urging the first slider (6) to move upward. The first elastic barb (61) is provided with a slope surface that generates elastic contraction deformation, the rear side of the first locking portion (85) is a locking surface that can be locked with the free end of the first elastic barb (61), the second locking portion (88) is a protruding locking position, the front side of the second locking portion (88) is provided with a slope surface for causing the second elastic barb (101) on the second slider (10) to generate elastic contraction deformation, and the rear side of the second locking portion 88 is a locking surface that can be locked with the free end of the second elastic barb (101); the first slideway (81) and the second slideway (83) are formed by the first mounting frame (8) and the second mounting frame (22), and the firing connecting rod (13) is formed along the first mounting frame (8) and the second mounting frame (22). The first firing portion (133) and the second firing portion (136) are arranged on one side of the firing link (13) close to the first slideway (81) and the second slideway (83); the first locking portion (85) is arranged on the first mounting frame (8) and / or the second mounting frame (22) and is located between the firing link (13) and the first slideway (81); the first locking portion (85) is located on one side or both sides of the first firing portion (133); the first elastic barb (61) is arranged on one side of the first slider (6) close to the firing link (13); the forward and backward movement path of the first elastic barb (61) passes through the first locking portion (85) and partially overlaps with the forward and backward movement path of the first firing portion (133). The second mounting frame (8) and the second mounting frame (22) are combined, the width of the free end of the first elastic barb (61) is greater than the width of the first firing portion (133); the second locking portion (88) is arranged on the first mounting frame (8) and / or the second mounting frame (22) and is located between the firing rod (13) and the second slideway (83); the second locking portion (88) is located on one side or both sides of the second firing portion (136); the second elastic barb (101) is arranged on a side of the second slide block (10) close to the firing rod (13); the forward and backward movement path of the second elastic barb (101) passes through the second locking portion (88) and partially overlaps with the forward and backward movement path of the second firing portion (136); and the width of the free end of the second elastic barb (101) is greater than the width of the second firing portion (136).

8. The sampling stroke adjustment mechanism of the biopsy device according to claim 3, characterized in that: When the first slider (6) is in the locked state, the first locking portion (85) and the first firing portion (133) are respectively located at the front and rear sides of the free end of the first elastic barb (61); when the second slider (10) is in the locked state, the second locking portion (88) and the second firing portion (136) are respectively located at the front and rear sides of the free end of the second elastic barb (101).

9. A biopsy device, characterized in that: The invention comprises a sampling stroke adjustment mechanism of a biopsy device as claimed in any one of claims 1 to 8, wherein the mounting frame is also provided with a winding firing mechanism for driving the first slider (6) and the second slider (10) to move backward and lock the positioning and compress the first firing spring (7) and the second firing spring (11) to accumulate momentum; the winding firing mechanism comprises a first winding button (14) and a second winding button (19), the first winding button (14) is connected to the first slider (6) and can drive the first slider (6) to move backward, and the second winding button (19) is connected to the second slider (10) and can drive the second slider (10) to move backward.

10. A method for cocking and firing a biopsy device as claimed in claim 9, comprising the following steps: 1) Winding up the watch; The first winding button (14) and the second winding button (19) are pressed respectively; the first winding button (14) drives the first slider (6) to move backward to compress the first firing spring (7) until the first elastic barb (61) on the first slider (6) is locked with the hooking boss (151) on the sampling stroke adjustment component (15), and the first slider (6) and the needle tube (2) are wound; the second winding button (19) drives the second slider (10) to move backward to compress the second firing spring (11) until the second elastic barb (101) on the second slider (10) is locked, and the second slider (10) and the needle core (1) are wound; 2) Firing; Pressing the rear firing button (131) or pushing the side firing button (17) forward drives the firing connecting rod (13) to move forward; First, the firing link (13) causes the second elastic barb (101) to produce elastic deformation and separate from the second locking portion (88) through the second firing portion (136), thereby releasing the second slider (10) from the locked state. The second slider (10) moves forward under the push of the second firing spring (11), completing the unlocking and firing of the second slider (10) and the needle core (1); at the same time, the first firing portion (133) and the pushing portion (137) of the firing link (13) do not contact the first elastic barb (61) on the first slider (6), maintaining the locked state of the first slider (6); thus, part of the sampling groove of the needle core (1) is exposed from the front end of the needle tube (2); Then, as the firing link (13) continues to move forward, the pushing portion (137) at the front end of the firing link (13) abuts against the releasing portion (152) and can cause the sampling stroke adjustment component (15) to rotate, thereby causing the hooking boss (151) to withdraw from the forward and backward moving path of the first elastic barb (61), so as to release the locking of the hooking boss (151) on the first elastic barb (61), and the first slider (6) moves forward under the push of the first firing spring (7), completing the unlocking and firing of the first slider (6) and the needle tube (2), and the needle tube (2) moves forward to receive the sampling groove of the needle core (1) into its front end; Finally, the rear firing button (131) and the side firing button (17) are released, and the firing connecting rod (13) moves backward and resets under the push of the reset spring (18), and the sampling stroke adjustment component (15) is reset under the action of the elastic member (16).

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