Biopsy needle and biopsy device

Abstract

The biopsy needle comprises a needle assembly, a shell, an inner needle tube seat, an outer needle tube seat and a rotary transmission mechanism, and the needle assembly comprises a needle core, an inner needle tube and an outer needle tube; the shell is provided with a containing cavity, and the needle core is fixedly connected to the shell; the inner needle tube seat is arranged in the containing cavity, the inner needle tube seat can move relative to the shell, the inner needle tube seat is fixedly connected with the inner needle tube, and the needle core is sleeved with the inner needle tube; the outer needle tube seat is arranged in the containing cavity, the outer needle tube seat can move relative to the shell and the inner needle tube seat, the outer needle tube seat is fixedly connected with the outer needle tube, and the inner needle tube is sleeved with the outer needle tube; the rotary transmission mechanism is arranged in the accommodating cavity and can operably rotate relative to the shell; wherein the inner needle tube seat and the outer needle tube seat can be connected with the rotary transmission mechanism after respectively moving for a preset stroke along the axis of the shell to complete sampling and percussion, so that the synchronous rotation of the inner needle tube and the outer needle tube is realized under the driving of the rotary transmission mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a biopsy needle and a biopsy device. Background Art

[0002] In medical diagnosis, it is often necessary to perform a biopsy (biopsy) operation on tumor patients to obtain part of the tissue at the lesion site for pathological research. A biopsy is a procedure that uses a biopsy needle to puncture and remove a small amount of pathological tissue for sampling and testing under the guidance of CT (computer tomography) images, ultrasound images or MRI (magnetic resonance imaging) images. In recent years, biopsy operations have been mainly performed using a biopsy needle puncture, which has basically replaced the traditional surgical incision method because of its advantages such as less trauma, less bleeding and high biopsy success rate.

[0003] Biopsy sampling using a biopsy needle is usually divided into three steps: puncturing the target location, cutting and sampling, and separating tissue samples. The cutting and sampling step requires cutting and separating the target tissue sample from the surrounding tissue and temporarily storing it in the reserved chamber of the biopsy needle. If the cutting and separation of the target tissue sample and the surrounding tissue is not thorough, the target tissue sample temporarily stored in the reserved chamber of the biopsy needle is likely to fall out of the biopsy needle due to the involvement of the surrounding tissue during the process of the biopsy needle being pulled out of the human body, and ultimately causing sampling failure. Therefore, in order to improve the success rate of sampling, some doctors will manually rotate the biopsy needle 1 to 2 circles as a whole after firing the biopsy needle to sample, so as to achieve the purpose of completely cutting and separating the target tissue sample from the surrounding tissue. However, on the one hand, for puncture biopsy under the guidance of ultrasound imaging, the doctor needs to operate the biopsy needle with one hand, and it is difficult to manually rotate the biopsy needle as a whole; on the other hand, since the biopsy needle is long, manually rotating the biopsy needle as a whole is likely to cause the needle tip to shake or the rotation radius at the needle tip to be large, thereby increasing the puncture wound and causing greater trauma. Summary of the invention

[0004] Based on this, it is necessary to provide a biopsy needle and a biopsy device to address the technical problems in the related art that the biopsy needle is inconvenient to rotate, causes secondary trauma, and has a large puncture wound.

[0005] A biopsy needle, comprising:

[0006] A needle assembly, the needle assembly comprising a needle core, an inner needle tube and an outer needle tube;

[0007] A housing having a receiving cavity, wherein the needle core is fixedly connected to the housing;

[0008] An inner needle tube seat is disposed in the accommodating cavity, the inner needle tube seat can move relative to the housing, the inner needle tube seat is fixedly connected to the inner needle tube, and the inner needle tube is sleeved on the needle core;

[0009] An outer needle tube seat is disposed in the accommodating cavity, the outer needle tube seat can move relative to the housing, the outer needle tube seat and the inner needle tube seat can move relative to each other, the outer needle tube seat is fixedly connected to the outer needle tube, and the outer needle tube is sleeved on the inner needle tube;

[0010] A rotary transmission mechanism, disposed in the accommodating cavity and operable to rotate relative to the shell;

[0011] Among them, after the inner needle tube seat and the outer needle tube seat move along the axis of the shell for a preset stroke to complete sampling and firing, they can be connected to the rotating transmission mechanism, so that the inner needle tube and the outer needle tube can rotate synchronously under the drive of the rotating transmission mechanism.

[0012] In one embodiment, the rotation transmission mechanism comprises:

[0013] A transmission assembly, movably connected to the housing;

[0014] A rotating member is rotatably connected to the housing, the transmission assembly is transmission-connected to the rotating member, and both the inner needle tube seat and the outer needle tube seat can be connected to the rotating member;

[0015] Wherein, when the transmission assembly moves relative to the housing along the axis of the housing, the transmission assembly can drive the rotating member to rotate relative to the housing;

[0016] The rotating member is provided with an avoidance hole which penetrates the rotating member along the axial direction of the rotating member, and the avoidance hole is used for the needle assembly to pass through.

[0017] In one embodiment, the rotation transmission mechanism further comprises:

[0018] A driving assembly is connected to the housing, the driving assembly can be operably moved relative to the housing, and the driving assembly is connected to the transmission assembly to drive the transmission assembly to move relative to the housing.

[0019] In one embodiment, the drive assembly includes a first drive assembly; the transmission assembly includes:

[0020] A transmission screw, threadedly connected to the rotating member;

[0021] A loading buckle is fixedly connected to the transmission screw, and when the loading buckle moves toward the proximal end of the shell by a preset stroke, the loading buckle can be engaged with the shell;

[0022] Wherein, the first driving assembly can abut against the loading buckle to unlock the loading buckle after being engaged, so that the transmission screw can move relative to the housing.

[0023] In one embodiment, the first drive assembly comprises:

[0024] A rotating firing button, partly disposed outside the accommodating cavity;

[0025] The rotary firing buckle is fixedly connected to the rotary firing button. The rotary firing buckle can be abutted against the loading buckle. When the rotary firing button is operably moved relative to the shell, the rotary firing buckle can apply a force to the loading buckle to disengage the loading buckle from the shell.

[0026] In one embodiment, the first drive assembly comprises:

[0027] A first elastic member, wherein the first elastic member is sleeved on the transmission screw, and two ends of the first elastic member are respectively against the housing and the chamber buckle;

[0028] Wherein, when the chamber buckle is engaged with the housing, the first elastic member is compressed;

[0029] After the clamping connection between the loading buckle and the shell is unlocked, the loading buckle moves toward the distal end of the shell under the action force of the first elastic member.

[0030] In one embodiment, the drive assembly further includes a second drive assembly, and the second drive assembly includes:

[0031] A rotating loading push block, wherein the rotating loading push block is movably connected to the shell, one end of the rotating loading push block abuts against the loading buckle, and the rotating loading push block can operably drive the loading buckle to move a preset stroke toward the proximal end of the shell so that the loading buckle is engaged with the shell.

[0032] In one embodiment, the biopsy needle further comprises:

[0033] A loading slide block, part of which is disposed outside the accommodating cavity, and the part disposed inside the accommodating cavity can abut against the inner needle tube seat and the outer needle tube seat, and the loading slide block is also connected to the rotating loading push block to drive the rotating loading push block to move relative to the housing;

[0034] When the loading slide block is operably moved, the loading slide block can push the inner needle tube seat and the outer needle tube seat to move to a preset distance relative to the shell and engage with the shell to achieve loading.

[0035] In one embodiment, the biopsy needle further comprises:

[0036] An unlocking button is arranged at the proximal end of the shell, and is used to disengage the inner needle tube seat and the outer needle tube seat from the clamping connection with the shell, thereby realizing the firing of the inner needle tube and the outer needle tube.

[0037] In one embodiment, the proximal end of the rotating member is provided with two spaced-apart insertion keys;

[0038] The outer needle tube seat and the inner needle tube seat are each provided with a slot corresponding to the insertion key, and the insertion key can be inserted into the slot.

[0039] In one embodiment, a rotation guide slot is provided on the rotating member; and the transmission assembly comprises:

[0040] A rotating firing button, partly disposed outside the accommodating cavity, the rotating firing button being movably connected to the shell along the axis of the shell;

[0041] A rotating firing push block is fixedly connected to the rotating firing button, and a portion of the rotating firing push block can be slidably disposed in the rotating guide slot;

[0042] When the rotary firing button is pushed to move, the rotary firing push block moves along the guide slot, thereby converting the movement of the rotary firing button into the rotation of the rotating member relative to the shell.

[0043] In one embodiment, the rotating member includes interconnected:

[0044] A disc-shaped portion, rotatably connected to the housing, and capable of being connected to the outer needle tube seat and the inner needle tube seat;

[0045] The rod-shaped portion, the rotation guide slot is arranged on the outer peripheral surface of the rod-shaped portion.

[0046] In one embodiment, the transmission assembly further comprises:

[0047] a third elastic member, two ends of which are respectively against the rotating firing push block and the housing;

[0048] When the rotary firing push block slides along the rotary guide slot, the third elastic member can be compressed to provide elastic force for the return of the rotary firing push block.

[0049] Beneficial effects of the present invention:

[0050] The present invention provides a biopsy needle, wherein the needle assembly is used to cut and separate the sample tissue in the sampling space, so as to achieve the purpose of sampling. The shell is used to accommodate the inner needle tube seat, the outer needle tube seat and other components, and the shell is also used to fix the needle core so that the needle core is fixed relative to the shell. Since the inner needle tube is sleeved on the needle core, the inner needle tube seat is used to fix the inner needle tube, and the inner needle tube seat is arranged in the accommodating cavity, and the inner needle tube seat can be moved relative to the shell, so that the inner needle tube can move relative to the needle core, so that the hollow area between the inner needle tube and the needle core is filled with sample tissue. Since the outer needle tube is sleeved on the inner needle tube, the outer needle tube is fixedly connected to the outer needle tube seat, and the outer needle tube seat can move relative to the shell, the outer needle tube seat and the inner needle tube seat can move relative to each other, so that the outer needle tube can move relative to the needle core and the inner needle tube, so that the elastic blade on the outer needle tube can pass through the slot on the inner needle tube and enter the inner needle tube, so that the outer needle tube can cut the target tissue between the inner needle tube and the needle core. Alternatively, when the elastic blade is provided on the inner needle tube and the slot is provided on the outer needle tube, the elastic blade on the inner needle tube can pass through one slot on the outer needle tube and then pass through another slot into the outer needle tube through the relative movement between the inner needle tube, the outer needle tube and the housing, so that the elastic blade on the inner needle tube can cut the target tissue between the inner needle tube and the outer needle tube. By providing a rotary transmission mechanism in the housing cavity of the housing, and the rotary transmission mechanism can be operably rotated relative to the housing, when the inner needle tube seat and the outer needle tube seat respectively move along the axis of the housing for a preset stroke and complete the sampling and firing, the rotary transmission mechanism can be connected to the inner needle tube seat and the outer needle tube seat, so that the inner needle tube seat and the outer needle tube seat rotate relative to the housing under the drive of the rotary transmission mechanism, and then the inner needle tube and the outer needle tube can rotate relative to the needle core, and during the rotation of the inner needle tube and the outer needle tube, the elastic blade on the outer needle tube extending into the inner needle tube will also rotate together to perform annular cutting on the sample tissue in the inner needle tube. Through the above structural form, the uncut tissue of the straight line cutting can be cut again by rotating the needle tube to achieve the purpose of completely cutting and separating the target tissue sample from the surrounding tissue, thereby reducing the entanglement of the uncut tissue when it is removed, causing some unnecessary tissue damage. Moreover, through the rotating transmission mechanism, after the firing is completed, the synchronous rotation and cutting of the inner and outer needle tubes can be manually controlled in situ, with a small cutting radius, avoiding the large rotation radius at the needle tip caused by the manual operation of the overall rotation of the biopsy needle, thereby avoiding the risk of secondary damage to the surrounding important organs and the increase of the puncture wound, greatly improving safety, and reducing the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of the structure of a biopsy needle provided in Example 1 of the present invention;

[0052] Figure 2 A schematic diagram of the structure of a biopsy needle after loading provided by Embodiment 1 of the present invention;

[0053] Figure 3 A schematic diagram of the structure of a biopsy needle after loading provided by Embodiment 1 of the present invention;

[0054] Figure 4 A schematic diagram of the internal structure of the biopsy needle provided in Example 1 of the present invention after firing;

[0055] Figure 5 A schematic diagram of the internal structure of the biopsy needle provided in Example 1 of the present invention after firing with the buckle ring hidden;

[0056] Figure 6 A schematic structural diagram of a rotation transmission mechanism of a biopsy needle provided in Example 1 of the present invention;

[0057] Figure 7 A schematic diagram of the structure of the loading buckle and the rotating firing buckle in the rotating transmission mechanism of the biopsy needle provided in Example 1 of the present invention when they interact with each other;

[0058] Figure 8 A schematic structural diagram of a rotating member in a rotary transmission mechanism of a biopsy needle provided in Example 1 of the present invention;

[0059] Fig. 9 A schematic structural diagram of a needle assembly of a biopsy needle provided in Example 1 of the present invention;

[0060] Fig.10 A schematic diagram of the structure of the rotation transmission mechanism of the biopsy needle provided in Example 2 of the present invention;

[0061] Fig.11 A schematic structural diagram of the rotation transmission mechanism of the biopsy needle provided in Embodiment 2 of the present invention from another perspective;

[0062] Fig.12 A schematic diagram of the structure of a rotating transmission mechanism of a biopsy needle provided in Example 2 of the present invention after a buckle ring is installed;

[0063] Fig.13 A schematic diagram of the structure of the rotation transmission mechanism of the biopsy needle provided in Example 2 of the present invention;

[0064] Fig.14 This is a schematic structural diagram of a rotating part in a rotary transmission mechanism of a biopsy needle provided in Example 2 of the present invention.

[0065] Reference numerals:

[0066] Housing 100; stopper 110; inner needle tube seat 200; first buckle 210; outer needle tube seat 300; second buckle 310; rotary transmission mechanism 400; transmission assembly 410; transmission screw 411; loading buckle 412; stopper protrusion 4121; rotating member 420; key 421; disc-shaped portion 422; rod-shaped portion 423; rotary guide slot 4231; straight slot section 4231a; curved slot section 4231b; slot bottom 4231c at the head end of the straight slot section; slot bottom 4231c at the tail end of the curved slot section 1d; drive assembly 430; first drive assembly 431; rotary firing button 4311; rotary firing buckle 4312; first elastic member 4313; rotary firing push block 4314; third elastic member 4315; second drive assembly 432; rotary loading push block 4321; needle assembly 500; needle core 510; inner needle tube 520; slot 521; outer needle tube 530; elastic blade 531; buckle ring 600; fixing ring 700; loading slide block 810; second elastic member 820; unlocking button 830. DETAILED DESCRIPTION

[0067] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0068] 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", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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, and do not indicate or imply 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.

[0069] 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, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0073] Example 1

[0074] See also Figures 1 to 9An embodiment of the present invention provides a biopsy needle, which includes a needle assembly 500, a housing 100, an inner needle tube seat 200, an outer needle tube seat 300 and a rotating transmission mechanism 400. The needle assembly 500 includes a needle core 510, an inner needle tube 520 and an outer needle tube 530. The housing 100 has a receiving cavity, and the needle core 510 is fixedly connected to the housing 100. The inner needle tube seat 200 is disposed in the receiving cavity, and the inner needle tube seat 200 can move relative to the housing 100. The inner needle tube seat 200 is fixedly connected to the inner needle tube 520, and the inner needle tube 520 is sleeved on the needle core 510. The outer needle tube seat 300 is disposed in the receiving cavity, and the outer needle tube seat 300 is disposed in the receiving cavity. The needle tube seat 300 can move relative to the shell 100, the outer needle tube seat and the inner needle tube seat 200 can move relative to each other, the outer needle tube seat 300 is fixedly connected to the outer needle tube 530, and the outer needle tube 530 is sleeved on the inner needle tube 520; the rotating transmission mechanism 400 is arranged in the accommodating cavity and can be operably rotated relative to the shell 100; wherein, after the inner needle tube seat 200 and the outer needle tube seat 300 respectively move along the axis of the shell 100 for a preset stroke to complete the sampling and firing, they can both be connected to the rotating transmission mechanism 400, thereby realizing the synchronous rotation of the inner needle tube 520 and the outer needle tube 530 under the drive of the rotating transmission mechanism 400.

[0075] The biopsy needle provided by the technical solution, wherein the needle assembly 500 is used to cut and separate the sample tissue in the sampling space, so as to achieve the purpose of sampling. The housing 100 is used to accommodate the inner needle tube seat 200, the outer needle tube seat 300 and other components, and the housing 100 is also used to fix the needle core 510 so that the needle core 510 is fixed relative to the housing 100. Since the inner needle tube 520 is sleeved on the needle core 510, the inner needle tube seat 200 is used to fix the inner needle tube 520, and the inner needle tube seat 200 is arranged in the accommodating cavity, and the inner needle tube seat 200 can move relative to the housing 100, so that the inner needle tube 520 can move relative to the needle core 510, so that the hollow area between the inner needle tube 520 and the needle core 510 is filled with sample tissue. Since the outer needle tube 530 is sleeved on the inner needle tube 520, the outer needle tube 530 is fixedly connected to the outer needle tube seat 300, and the outer needle tube seat 300 can move relative to the housing 100 and the inner needle tube seat 200, the outer needle tube 530 can move relative to the needle core 510 and the inner needle tube 520, so that the elastic blade 531 on the outer needle tube 530 can pass through the slot 521 on the inner needle tube 520 and extend into the inner needle tube 520, so that the outer needle tube 530 can cut the target tissue between the inner needle tube 520 and the needle core 510. Alternatively, when the elastic blade is provided on the inner needle tube (not shown in the drawings of this scheme), and the slot is provided on the outer needle tube, the elastic blade on the inner needle tube can pass through one slot on the outer needle tube and then pass through another slot into the outer needle tube through the relative movement between the inner needle tube, the outer needle tube and the housing, so that the elastic blade on the inner needle tube can cut the target tissue between the inner needle tube and the outer needle tube. By arranging a rotary transmission mechanism 400 in the accommodating cavity of the shell 100, and the rotary transmission mechanism 400 can be operably rotated relative to the shell 100, when the inner needle tube seat 200 and the outer needle tube seat 300 respectively move the preset stroke along the axis of the shell 100 and complete the sampling and firing, the rotary transmission mechanism 400 can be connected with the inner needle tube seat 200 and the outer needle tube seat 300, so that the inner needle tube seat 200 and the outer needle tube seat 300 can rotate relative to the shell 100 under the drive of the rotary transmission mechanism 400, and then the inner needle tube 520 and the outer needle tube 530 can rotate relative to the needle core 510. During the rotation of the inner needle tube 520 and the outer needle tube 530, the elastic blade 531 on the outer needle tube 530 extending into the inner needle tube 520 will also rotate together, so that the elastic blade 531 can perform annular cutting on the sample tissue in the inner needle tube. Through the above structural form, the tissue that is not cut by the linear cutting can be cut again by rotating the needle tube to achieve the purpose of completely cutting and separating the target tissue sample from the surrounding tissue, thereby reducing the entanglement of the uncut tissue when it is removed, causing some unnecessary tissue damage.Moreover, through the rotating transmission mechanism 400, after the firing is completed, the inner and outer needle tubes 530 can be manually controlled to rotate and cut synchronously in situ with a small cutting radius, avoiding the large rotation radius at the needle tip caused by the manual operation of the biopsy needle as a whole rotation, thereby avoiding the risk of secondary damage to surrounding important organs and increase in puncture wounds, greatly improving safety and reducing the patient's pain.

[0076] In the needle assembly 500 provided in this embodiment, the needle core 510 is fixedly connected to the shell body 100, the inner needle tube 520 is fixedly connected to the inner needle tube seat 200, and the outer needle tube 530 is fixedly connected to the outer needle tube seat 300. The inner needle tube 520 is sleeved on the needle core 510, and the outer needle tube 530 is sleeved on the inner needle tube seat 200, and the needle core 510, the inner needle tube 520 and the outer needle tube 530 are coaxially arranged.

[0077] In one embodiment, the inner needle tube 520 has a cutting edge structure at its distal end, which can cut human tissue. A slot 521 penetrating the side wall of the inner needle tube 520 is provided on the side wall of the inner needle tube 520; an elastic blade 531 is provided at the distal end of the outer needle tube 530. When the outer needle tube 530 moves relative to the inner needle tube 520 along the axis of the needle assembly (500), the elastic blade 531 can pass through the slot 521 on the inner needle tube 520 and enter the interior of the inner needle tube 520 to cut the tissue between the inner needle tube 520 and the needle core 510.

[0078] In another embodiment, except that the structures of the inner needle tube 520 and the outer needle tube 530 are different, the other structures remain unchanged. Specifically, an elastic blade is provided on the inner needle tube 520, and two spaced slots are provided on the outer needle tube 530. The elastic blade passes through the slot from the inner side of the outer needle tube 530 and rests on the tube wall between the two slots. The elastic blade is constructed as an arc structure. When the inner needle tube 520 moves relative to the outer needle tube 530, the elastic blade can enter the outer needle tube 530 from the slot near the distal end of the outer needle tube 530 to cut the target tissue between the inner needle tube 520 and the outer needle tube 530.

[0079] It should be noted that in the present invention, for a biopsy needle, the proximal end refers to the end close to the operator's operating end, and the distal end refers to the end away from the operator's operating end. The distal ends of the needle core 510, the inner needle tube 520, and the outer needle tube 530 refer to the ends away from the operating end. Among them, the inner needle tube seat 200 and the outer needle tube seat 300 are arranged in the accommodating cavity of the shell 100 at the end close to the proximal end, and the rotating transmission mechanism 400 is arranged in the accommodating cavity of the shell 100 at the end close to the distal end.

[0080] like Figure 5 and Figure 6As shown, in one embodiment, the rotating transmission mechanism 400 includes a transmission assembly 410 and a rotating member 420, the transmission assembly 410 is movably connected to the shell 100; the rotating member 420 is rotatably connected to the shell 100, the transmission assembly 410 is transmission-connected to the rotating member 420, and both the inner needle tube seat 200 and the outer needle tube seat 300 can be connected to the rotating member 420; wherein, when the transmission assembly 410 moves relative to the shell 100 along the axis of the shell 100, the transmission assembly 410 can drive the rotating member 420 to rotate relative to the shell 100; the rotating member 420 is constructed with an avoidance hole that passes through the rotating member 420 along the axial direction of the rotating member 420, and the avoidance hole is used for the needle assembly 500 to pass through.

[0081] The transmission assembly 410 is connected to the rotating member 420 in a transmission connection so as to convert the linear movement of the transmission assembly 410 along the axis of the housing 100 into the rotational movement of the rotating member 420 around the axis of the housing 100. Since the rotating member 420 can be connected to the inner needle tube seat 200 and the outer needle tube seat 300, when the rotating member 420 rotates, the inner needle tube seat 200 and the outer needle tube seat 300 can be driven by the rotating member 420 to rotate relative to the housing 100, thereby realizing the rotation of the inner needle tube 520 and the outer needle tube 530 relative to the needle core 510. Since the inner needle tube seat 200 and the outer needle tube seat 300 are arranged at the proximal end of the housing 100, and the rotation transmission assembly 410 is arranged at the distal end of the housing 100, an avoidance hole is arranged on the rotating member 420 so as to facilitate the inner needle tube 520 and the outer needle tube 530 to pass through and extend out of the housing 100.

[0082] It should be noted that, in this embodiment, the rotating member 420 can only rotate relative to the housing 100 around the axis of the housing 100, and cannot move linearly along the axis of the housing 100. There is no restriction on the rotatable connection form between the rotating member 420 and the housing 100. In some embodiments, a limiting groove can be provided on the housing 100, and the periphery of the rotating member 420 is provided in the limiting groove, so that the rotating member 420 can only rotate in the limiting groove, and the groove wall of the limiting groove limits the movement of the rotating member 420 along the axial direction of the housing 100. In another embodiment, the biopsy needle further includes a fixing ring 700, which is fixedly connected to the housing 100, and a limiting groove extending along the circumferential direction of the fixing ring 700 is configured on the inner circumferential surface of the fixing ring 700; the outer circumferential edge of the rotating member 420 is provided in the limiting groove, and the rotating member 420 can rotate relative to the fixing ring 700 along the circumferential direction of the fixing ring 700.

[0083] like Figure 5 and Figure 6As shown, in one embodiment, the rotation transmission mechanism 400 further includes a driving assembly 430, which is connected to the housing 100. The driving assembly 430 can be operably moved relative to the housing 100, and the driving assembly 430 is connected to the transmission assembly 410 to drive the transmission assembly 410 to move relative to the housing 100. By providing the driving assembly 430 and connecting the driving assembly 430 to the transmission assembly 410, the transmission assembly 410 is driven to move relative to the housing 100 by moving the driving assembly 430 relative to the housing 100, and the transmission assembly 410 drives the rotating member 420 to rotate relative to the housing 100.

[0084] Specifically, the drive assembly 430 includes a first drive assembly 431; the transmission assembly 410 includes a transmission screw 411 and a loading buckle 412, and the transmission screw 411 is threadedly connected to the rotating member 420; the loading buckle 412 is fixedly connected to the drive screw 411, and when the loading buckle 412 moves a preset stroke toward the proximal end of the shell 100, the loading buckle 412 can be engaged with the shell 100; wherein the first drive assembly 431 can abut against the loading buckle 412 to unlock the engaged loading buckle 412, so that the drive screw 411 can move relative to the shell 100.

[0085] The driving screw 411 is threadedly connected to the rotating member 420, and since the rotating member 420 can only rotate relative to the housing 100, when the driving screw 411 moves relative to the housing 100, the rotating member 420 can be driven to rotate relative to the housing 100 under the action of the driving screw 411. The loading buckle 412 is fixedly connected to the driving screw 411, so that when the inner needle tube 520 and the outer needle tube 530 are loaded, the loading buckle 412 can move a certain distance along the axis of the housing 100 toward the proximal end of the housing 100 and then be engaged with the housing 100. At this time, the loading buckle 412 is relatively fixed to the housing 100. When the inner needle tube 520 and the outer needle tube 530 are fired, the first drive assembly 431 moves relative to the shell 100 so that the first drive assembly 431 can abut against the loading buckle 412 and apply a thrust to the loading buckle 412 to move toward the distal direction of the shell 100, thereby unlocking the connection between the loading buckle 412 and the shell 100, so that the transmission screw 411 can move relative to the shell 100, thereby driving the rotating member 420 to rotate relative to the shell 100.

[0086] It should be noted that the loading buckle 412 can only move along the axial direction of the housing 100, and cannot rotate relative to the housing 100. In some embodiments, a limiting protrusion 4121 protruding outward along the radial direction of the loading buckle 412 is provided on the outer circumferential surface of the loading buckle 412, and a clamping groove is provided on the inner side wall of the housing 100, and the clamping groove extends along the axial direction of the housing 100. The limiting protrusion 4121 is clamped in the clamping groove, so that the loading buckle 412 can only move relative to the housing 100, and the clamping groove limits the loading buckle 412 circumferentially and guides the loading buckle 412 axially. In another embodiment, at least one limiting protrusion 4121 protruding outward in the radial direction is provided on the outer circumferential surface of the upper chamber buckle 412; the biopsy needle further comprises a buckle ring 600, which is disposed in the accommodating cavity and fixedly connected to the housing 100, and a clamping groove is provided on the buckle ring 600; wherein, the limiting protrusion 4121 can be clamped in the clamping groove, and the upper chamber buckle 412 is relatively fixed to the housing 100 by rotation. Such a configuration is provided to realize the movement of the upper chamber buckle 412 relative to the housing 100. In one embodiment, the transmission screw 411 is fixedly connected to the central part of the upper chamber buckle 412, and at least two spaced buckles are provided on the periphery of the upper chamber buckle 412, and the buckles are used to be clamped with the housing 100.

[0087] like Figure 5 and Figure 6 As shown, in one embodiment, the first drive assembly 431 includes a rotating firing button 4311 and a rotating firing buckle 4312, and the rotating firing button 4311 is partially arranged outside the accommodating cavity; the rotating firing buckle 4312 is fixedly connected to the rotating firing button 4311, and the rotating firing buckle 4312 can abut against the loading buckle 412. When the rotating firing button 4311 is operably moved relative to the shell 100, the rotating firing buckle 4312 can apply a force to the loading buckle 412 to disengage the loading buckle 412 from the shell 100.

[0088] The rotating firing button 4311 is partially disposed outside the accommodating cavity so that the operator can apply a force to the rotating firing button 4311. The rotating firing buckle 4312 is fixedly connected to the rotating firing button 4311 so that when the rotating firing button 4311 is operably moved, the rotating firing buckle 4312 can move relative to the housing 100 along with the rotating firing button 4311. The rotating firing buckle 4312 can abut against the loading buckle 412, and when the rotating firing button 4311 is operably moved relative to the housing 100, the rotating firing buckle 4312 can apply a force to the loading buckle 412 so that the loading buckle 412 is disengaged from the housing 100. In this way, the mutual engagement between the loading buckle 412 and the housing 100 can be unlocked.

[0089] Specifically, Figure 5 and Figure 7 As shown, the rotary firing buckle 4312 is provided with a protrusion corresponding to the buckle on the loading buckle 412, wherein the buckle of the loading buckle 412 is provided with a guiding inclined surface, and the protrusion of the rotary firing buckle 4312 is also provided with an inclined surface, and the two inclined surfaces are in contact with each other to provide guidance when unlocking.

[0090] More specifically, in one of the embodiments, a snap-in groove is provided at the proximal end of the snap ring 600 , and during the loading process, after the loading snap 412 moves a preset stroke, the snap on the loading snap 412 snaps into engagement with the snap-in groove on the snap ring 600 .

[0091] like Figure 5 and Figure 6 As shown, in one embodiment, the first driving assembly 431 also includes a first elastic member 4313, which is sleeved on the transmission screw 411, and the two ends of the first elastic member 4313 respectively abut against the shell 100 and the loading buckle 412; wherein, when the loading buckle 412 is engaged with the shell 100, the first elastic member 4313 is compressed; after the engagement between the loading buckle 412 and the shell 100 is unlocked, the loading buckle 412 moves toward the far end of the shell 100 under the action of the first elastic member 4313.

[0092] By arranging the first elastic member 4313 between the shell 100 and the loading buckle 412, when the loading buckle 412 is engaged with the shell 100, the first elastic member 4313 is compressed, so that elastic potential energy is stored on the first elastic member 4313. When the engagement between the loading buckle 412 and the shell 100 is unlocked, the loading buckle 412 is pushed by the elastic potential energy of the first elastic member 4313 to move relative to the shell 100 toward the distal direction of the shell 100, thereby driving the transmission screw 411 to move through the loading buckle 412, thereby realizing the rotation of the rotating member 420 relative to the shell 100.

[0093] In this embodiment, the first elastic member 4313 is a spring, which is sleeved on the transmission screw 411, with one end abutting against the loading buckle 412 and the other end abutting against the end surface of the fixing ring 700. When the loading buckle 412 moves toward the proximal end of the housing 100, the spring is compressed.

[0094] like Figure 5 and Figure 6As shown, in one embodiment, the drive assembly 430 also includes a second drive assembly 432, and the second drive assembly 432 includes a rotating loading push block 4321, which is movably connected to the shell 100, and one end of the rotating loading push block 4321 abuts against the loading buckle 412. The rotating loading push block 4321 can be operably driven to move the loading buckle 412 toward the proximal end of the shell 100 by a preset stroke so that the loading buckle 412 is engaged with the shell 100.

[0095] By movably connecting the rotating loading push block 4321 to the housing 100, and placing one end of the rotating loading push block 4321 against the loading buckle 412, when the loading push block is operably moved, the loading push block can exert a force on the loading buckle 412 to drive the loading buckle 412 to move toward the proximal end of the housing 100, thereby achieving the locking of the loading buckle 412 with the locking groove on the buckle ring 600. The rotating loading push block 4321 is mainly used to load the loading buckle 412.

[0096] like Figure 5 and Figure 6 As shown, in one embodiment, the biopsy needle also includes a loading slider 810, and a portion of the loading slider 810 is disposed outside the accommodating cavity, and the portion disposed inside the accommodating cavity can abut against the inner needle tube seat 200 and the outer needle tube seat 300. The loading slider 810 is also connected to the rotating loading push block 4321 to drive the rotating loading push block 4321 to move relative to the shell 100; when the loading slider 810 is operably moved, the loading slider 810 can push the inner needle tube seat 200 and the outer needle tube seat 300 to move to a preset distance relative to the shell 100 and engage with the shell 100 to achieve loading.

[0097] like Figures 2 to 6As shown, the loading slide block 810 is mainly used to load the inner needle tube seat 200 and the outer needle tube seat 300. Specifically, a part of the loading slide block 810 is arranged outside the accommodating cavity so that the operator can exert force on the loading slide block 810, thereby realizing the movement of the loading slide block 810 relative to the housing 100. Since the part of the loading slide block 810 arranged in the accommodating cavity can abut against the inner needle tube seat 200 and the outer needle tube seat 300, so that when the loading slide block 810 is operably moved relative to the housing 100, the loading slide block 810 can push the inner needle tube seat 200 and the outer needle tube seat 300 to move relative to the housing 100, so that the inner needle tube seat 200 and the outer needle tube seat 300 move a certain distance relative to the housing 100 and then engage with the housing 100, thereby realizing the loading of the inner needle tube seat 200 and the outer needle tube seat 300. The loading slide 810 is also connected to the rotating loading push block 4321, so that when the loading slide 810 moves relative to the shell 100, it can drive the rotating loading push block 4321 to move relative to the shell 100, thereby realizing the clamping connection between the loading buckle 412 and the buckle ring 600, so as to realize the loading of the loading buckle 412.

[0098] Specifically, Figures 2 to 4 As shown, a first buckle 210 is provided on the inner needle tube seat 200, and a second buckle 310 is provided on the outer needle tube seat 300. After the inner needle tube seat 200 and the outer needle tube seat 300 move a preset stroke in the proximal direction of the shell 100 under the action of the loading slider 810, the first buckle 210 and the second buckle 310 can be engaged with the shell 100; the biopsy needle also includes a second elastic member 820, the second elastic member 820 is arranged in the accommodating cavity, the second elastic member 820 is sleeved on the needle core 510, one end of the second elastic member 820 abuts against the shell 100, and the other end abuts against the outer needle tube seat 300; when the first buckle 210 and the second buckle 310 are detached from the shell 100, the inner needle tube seat 200 and the outer needle tube seat 300 can move in the distal direction of the shell 100 under the elastic force of the second elastic member.

[0099] In one embodiment, if Figures 2 to 4 As shown, the biopsy needle also includes an unlocking button 830, which is arranged at the proximal end of the shell 100. The unlocking button 830 is used to disengage the inner needle tube seat 200 and the outer needle tube seat 300 from the shell 100, thereby realizing the firing of the inner needle tube seat 200 and the outer needle tube 530.

[0100] In one embodiment, if Figure 5 , Figure 6 and Figure 8As shown, the proximal end of the rotating member 420 is provided with two spaced keys 421; the distal ends of the outer needle tube seat 300 and the inner needle tube seat 200 are respectively provided with a slot corresponding to the key 421, and the key 421 can be inserted into the slot. After the outer needle tube seat 300 and the inner needle tube seat 200 are fired, that is, after the outer needle tube seat 300 and the inner needle tube seat 200 move along the axis of the housing 100 to the distal end of the housing 100 by a preset distance, the slots on the outer needle tube seat 300 and the inner needle tube seat 200 can be respectively inserted into the key 421 on the rotating member 420, so that the outer needle tube seat 300, the inner needle tube seat 200 and the rotating member 420 are relatively fixed, so that when the rotating member 420 rotates relative to the housing 100, the outer needle tube seat 300 and the inner needle tube seat 200 can be driven to rotate relative to the housing 100.

[0101] Specifically, Figures 2 to 4 As shown, the proximal end of the housing 100 is provided with an opening connected to the accommodating cavity of the housing 100, and the unlocking button 830 passes through the opening, with one end located outside the accommodating cavity and the other end located inside the accommodating cavity. In the housing 100, a limit block 110 is provided adjacent to the position where the unlocking button 830 is located in the accommodating cavity. The ends of the inner needle tube seat 200 and the outer needle tube seat 300 close to the proximal end of the housing 100 are both provided with limit buckles. When the inner needle tube seat 200 and the outer needle tube seat 300 are pushed by the loading slide 810 to move along the proximal end of the housing 100, the buckles on the inner needle tube seat 200 and the outer needle tube seat 300 can be engaged with the limit block 110. It should be noted that a guide rod is also provided on the limit block 110, and a second elastic member 820 is sleeved on the outside of the guide rod, one end of the second elastic member 820 abuts against the limit block 110, and the other end abuts against the outer needle tube seat 300. When the first buckle and the second buckle 310 on the inner needle tube seat 200 and the outer needle tube seat 300 are engaged with the limit block 110, the second elastic member 820 is in a compressed state. Further, the second elastic member 820 is a spring.

[0102] When the inner needle tube seat 200 and the outer needle tube seat 300 need to be unlocked, the unlocking button 830 is pressed to move the unlocking button 830 along the axis of the housing 100 toward the proximal direction of the housing 100, so that the unlocking button 830 abuts against the buckles of the inner needle tube seat 200 and the outer needle tube seat 300, so that the inner needle tube seat 200 and the outer needle tube seat 300 are disengaged from the stop block 110. At this time, the inner needle tube seat 200 and the outer needle tube seat 300 move toward the distal direction of the housing 100 along the axis of the housing 100 under the action of the elastic force of the second elastic member 820. This process is the firing process of the inner needle tube 520 and the outer needle tube 530. Furthermore, an unlocking plate corresponding to the buckles on the inner needle tube seat 200 and the outer needle tube seat 300 is provided at one end of the unlocking button 830 located in the accommodating cavity to apply force to the buckles on the inner needle tube seat 200 and the outer needle tube seat 300 .

[0103] The working principle of the biopsy needle provided in the above embodiment is as follows (refer to Figures 1 to 12 Understand):

[0104] Before inserting the biopsy needle into the human body, the biopsy needle needs to be loaded. When loading, the loading slider 810 is pushed toward the proximal direction of the shell 100, and the loading slider 810 drives the inner needle tube seat 200 and the outer needle tube seat 300 to move along the axis of the shell 100 toward the proximal end of the shell 100. During this process, the second elastic member 820 is compressed, thereby accumulating elastic potential energy until the buckle structure in the outer needle tube seat 300 and the inner needle tube seat 200 is fixed on the limit block 110 in the shell 100, and the second elastic member 820 stops compressing. During the process of the loading slide 810 moving toward the proximal end of the housing 100, the loading slide 810 will drive the rotating loading push block 4321 to move toward the proximal end of the housing 100, and the rotating loading push block 4321 will push the loading buckle 412 to move toward the proximal end of the housing 100. In this process, the loading buckle 412 compresses the first elastic member 4313 and accumulates elastic potential energy until the buckle structure on the loading buckle 412 is buckled into the buckle groove of the buckle ring 600, the loading buckle 412 stops moving, and the first elastic member 4313 stops the compression process. At this time, the inner needle tube seat 200, the outer needle tube seat 300 and the loading buckle 412 in the biopsy needle are all in the loading state, and the inner needle tube and the outer needle tube 530 and the rotating transmission mechanism 400 are also in the loading state.

[0105] When the biopsy needle of the present embodiment is inserted into the human body and punctured to the target position of the target tissue under the guidance of the imaging device. By pressing the unlocking button 830 arranged at the proximal end of the housing 100, the unlocking button 830 moves toward the distal end of the housing 100, and the unlocking plate on the unlocking button 830 directly abuts against the buckle structure in the inner needle tube seat 200 and the outer needle tube seat 300, and the buckle structure is stressed and separated from the limit block 110. At this time, the elastic potential energy stored in the second elastic member 820 during the loading process is converted into kinetic energy. Since one end of the second elastic member 820 is in contact with the outer needle tube seat 300, in the process of converting the elastic potential energy into kinetic energy, the second elastic member 820 pushes the outer needle tube seat 300 to move along the axial direction of the housing 100 toward the distal end of the housing 100, and at the same time, the outer needle tube seat 300 pushes the inner needle tube seat 200 to move along the axial direction of the housing toward the distal end of the housing 100, thereby driving the inner needle tube and the outer needle tube 530 to move along the distal end of the housing 100.

[0106] It should be noted that a buckle is provided at the distal end of the inner needle tube seat 200, and the buckle abuts against the distal end of the outer needle tube seat 300, so that when the second elastic member 820 pushes the outer needle tube seat 300 to move, the inner needle tube seat 200 can move together with the outer needle tube seat 300. In this process, the cutting edge at the distal end of the inner needle tube 520 penetrates into the tissue, so that the target tissue enters the inner needle tube 520, and the outer needle tube 530 moves simultaneously with the inner needle tube. When the inner needle tube seat 200 moves to the point where the buckle on the inner needle tube seat abuts against the unlocking inclined surface on the fixing ring, the outer needle tube seat 300 disengages from the abutment with the buckle on the inner needle tube seat 200, and continues to move a certain distance toward the distal end of the housing under the elastic force of the second elastic member 820. At this time, the elastic blade 531 on the outer needle tube 530 enters the inner needle tube 520 from the slot 521 on the inner needle tube 520, passes through the sample tissue in the inner needle tube, and achieves the purpose of radial cutting of the sample tissue. This process is the firing process of the biopsy needle.

[0107] It is understandable that in the technical solution in which the elastic blade is provided on the inner needle tube and two spaced slots are provided on the outer needle tube 530, a buckle is provided at the distal end of the outer needle tube seat 300, the buckle abuts against the distal end of the inner needle tube seat 200, and the second elastic member 820 abuts against the proximal end of the inner needle tube seat 200. When the second elastic member 820 pushes the inner needle tube seat 200 to move, the outer needle tube seat 300 can move simultaneously with the inner needle tube seat 200. In this process, the blade at the distal end of the inner needle tube 520 penetrates into the tissue, so that the target tissue enters the inner needle tube 520, and the outer needle tube 530 moves simultaneously with the inner needle tube 520. When the outer needle tube seat 300 moves to the point where the buckle on the outer needle tube seat 300 abuts against the unlocking inclined surface on the fixing ring, the inner needle tube seat 200 disengages from the abutment with the buckle on the outer needle tube seat 300, and continues to move a certain distance toward the distal end of the housing under the elastic force of the second elastic member 820. During this process, the inner needle tube 520 moves relative to the outer needle tube 530 driven by the inner needle tube seat 200. At this time, the elastic blade on the inner needle tube 520 enters the outer needle tube 530 from the slot near the distal end of the outer needle tube 530, passes through the sample tissue between the inner needle tube 520 and the outer needle tube 530, and achieves the purpose of radial cutting of the sample tissue.

[0108] After the outer needle tube seat 300 and the inner needle tube seat 200 are fired, the slots on the outer needle tube seat 300 and the inner needle tube seat 200 can be respectively inserted into the keys 421 on the rotating member 420, so that the outer needle tube seat 300 and the inner needle tube seat 200 are relatively fixed to the rotating member 420, so that when the rotating member 420 rotates relative to the shell 100, it can drive the outer needle tube seat 300 and the inner needle tube seat 200 to rotate relative to the shell 100.

[0109] After the biopsy needle is fired, the rotary firing button 4311 is toggled to move the rotary firing button 4311 toward the distal end of the housing 100, so as to drive the rotary firing buckle 4312 toward the distal end of the housing 100. When the rotary firing buckle 4312 moves to abut against the buckle structure on the loading buckle 412, the buckle structure of the loading buckle 412 is separated from the buckle ring 600 by the force of the rotary firing buckle 4312. After the buckle structure of the loading buckle 412 is separated from the buckle ring 600, the first elastic member 4313 is no longer compressed, and the elastic potential energy stored in the loading process is converted into kinetic energy, pushing the loading buckle 412 to move toward the distal end of the housing 100, and at this time, the loading buckle 412 drives the transmission screw 411 to move toward the distal end of the housing 100. Since the rotating member 420 cooperates with the transmission screw 411 through the screw hole structure, during the movement of the transmission screw 411 relative to the housing 100, the rotating member 420 rotates with the axis of the housing 100 as the rotation axis under the force of the transmission screw 411, and drives the outer needle tube seat 300 and the inner needle tube seat 200 to rotate in the same direction, so that the inner needle tube seat 200 and the outer needle tube 530 start to rotate. During the rotation of the inner needle tube seat 200, the elastic blade 531 on the outer needle tube 530 extending into the inner needle tube 520 will also rotate together, so that the sample tissue in the inner needle tube is separated from the surrounding tissue by the elastic blade 531.

[0110] It should be noted that, in the present invention, the biopsy needle can also be fired in the following manner: when the loading slide 810 is pushed toward the direction close to the distal end of the shell 100, the loading slide 810 will drive the unlocking button 830 to move toward the direction close to the distal end of the shell 100, and the unlocking plate on the unlocking button 830 will directly contact the buckle structure in the outer needle tube seat 300 and the inner needle tube seat 200. The buckle structure is subjected to force and separated from the limit block 110 in the shell 100. At this time, the elastic potential energy accumulated by the second elastic member 820 during the loading process is converted into kinetic energy. Since one end of the second elastic member 820 is in contact with the outer needle tube seat 300, during the process of converting the elastic potential energy into kinetic energy, the second elastic member 820 pushes the outer needle tube seat 300 to move toward the distal end of the housing 100 along the axial direction of the housing 100. At the same time, the outer needle tube seat 300 pushes the inner needle tube seat 200 to move relative to the housing along the axial direction of the housing 100 toward the distal end of the housing 100, thereby driving the inner needle tube 520 and the outer needle tube 530 to move along the distal end of the housing 100. In this process, the cutting edge at the distal end of the inner needle tube seat 200 penetrates into the target tissue. When the buckle at the distal end of the inner needle tube seat is unlocked, the inner needle tube seat no longer moves along the axis of the shell, and the outer needle tube seat 300 continues to move along the axis of the shell 100 under the elastic force of the second elastic member 820, so that the elastic blade 531 on the outer needle tube 530 enters the inner needle tube from the slot 521 on the inner needle tube 520, passes through the sample tissue in the inner needle tube seat 200, and achieves the purpose of radial cutting of the sample tissue.

[0111] Example 2

[0112] The structure of the biopsy needle provided in this embodiment is basically the same as that in Embodiment 1. Therefore, the drawings in Embodiment 1 can be used to understand the technical solution of Embodiment 2. The difference is that:

[0113] like Figures 10 to 14 As shown, in one embodiment, a rotation guide groove 4231 is provided on the rotating member 420; the transmission assembly 410 includes a rotation firing button 4311 and a rotation firing push block 4314, wherein the rotation firing button 4311 is partially disposed outside the accommodating cavity, and the rotation firing button 4311 is movably connected to the shell 100 along the axis of the shell 100; the rotation firing push block 4314 is fixedly connected to the rotation firing button 4311, and a portion of the rotation firing push block 4314 is slidably disposed in the rotation guide groove 4231; wherein, when the rotation firing button 4311 is pushed to move, the rotation firing push block 4314 moves along the guide groove, thereby converting the movement of the rotation firing button 4311 into rotation of the rotating member 420 relative to the shell 100.

[0114] In this embodiment, a part of the rotating firing button 4311 is arranged outside the accommodating cavity so that the operator can apply force to the rotating firing button 4311. By connecting the rotating firing button 4311 with the rotating firing push block 4314, and arranging the rotating firing push block 4314 in the rotating guide slot 4231 on the rotating member, when the rotating firing push block 4314 pushes the rotating firing push block 4314 to move under the force of the rotating firing button 4311, since the rotating firing button 4311 moves along the axis of the housing 100, and the rotating firing push block 4314 can only move along the rotating guide slot 4231, the rotating firing push block 4314 pushes the rotating member 420 to rotate relative to the housing 100.

[0115] Furthermore, if Fig.13 and Fig.14 As shown, the rotary guide groove 4231 is a closed curve groove. More specifically, the rotary guide groove 4231 is a partially spiral closed curve groove arranged on the outer peripheral surface of the rotating member, so that when the rotary firing button 4311 moves along the axis of the shell 100, the rotating firing push block 4314 is used to push the rotating member to rotate relative to the shell 100.

[0116] In one embodiment, if Figure 12 to Figure 14 As shown, the rotating member 420 includes a disk-shaped portion 422 and a rod-shaped portion 423 connected to each other, the disk-shaped portion 422 is rotatably connected to the housing 100, and can be connected to the outer needle tube seat 300 and the inner needle tube seat 200; the rotation guide slide groove 4231 is arranged around the outer circumferential surface of the rod-shaped portion 423. The rotating member 420 is arranged to include a disk-shaped portion 422 and a rod-shaped portion 423 connected to each other, so that the disk-shaped portion 422 is rotatably connected to the housing 100, and two insertion keys 421 are arranged on the disk-shaped portion 422, and the two insertion keys 421 are respectively used to be plugged into the slots on the inner needle tube seat 200 and the outer needle tube seat 300, so as to realize the mutual connection between the rotating member 420 and the inner needle tube seat 200 and the outer needle tube seat 300. By setting the rotation guide slot 4231 on the rod-shaped portion 423, when the rotation firing button 4311 is moved along the axis of the shell 100, the rotation firing push block 4314 pushes the rod-shaped portion 423 to rotate, thereby realizing the rotation of the rotating member 420.

[0117] Specifically, Fig.13 and Fig.14As shown, the rotation guide slot 4231 includes a straight slot section 4231a extending along the axial direction of the rod-shaped portion 423, and a curved slot section 4231b extending in a spiral around the axial direction of the rod-shaped portion 423, and the two ends of the curved slot section 4231b are connected to the two ends of the straight slot section 4231a. The spirally extending curved slot section 4231b is mainly used to guide the rotating firing push block 4314 when the inner needle tube seat 200 and the outer needle tube 530 need to be rotated, so as to realize the rotation of the rotating member 420; while the straight slot section 4231a is used to realize the guidance of the rotating firing push block 4314 and the rotating firing button 4311 when returning to their original positions.

[0118] Furthermore, if Fig.13 and Fig.14 As shown, the straight groove segment 4231a and the curved groove segment 4231b both include a head end and a tail end, the head end is an end close to the disc-shaped portion 422, and the tail end is an end away from the disc-shaped portion 422; the groove bottom 4231c at the head end of the straight groove segment is higher than the groove bottom at the head end of the curved groove segment, so as to limit the rotational firing push block 4314 from moving from the head end of the straight groove segment 4231a to the inside of the straight groove segment 4231a; the groove bottom 4231d at the tail end of the curved groove segment is higher than the groove bottom at the tail end of the straight groove segment 4231a, so as to limit the rotational firing push block 4314 from moving from the tail end of the curved groove segment 4231b to the inside of the curved groove segment 4231b. Through the above structure, the rotating firing push block 4314 is limited so that the rotating firing push block 4314 can only rotate in one direction in the rotating guide groove 4231, thereby ensuring that the rotating member 420 rotates in one direction, thereby ensuring reliability during tissue cutting.

[0119] In one embodiment, if Fig.12 and Fig.13 As shown, the rotation transmission mechanism 400 further includes a snap ring 600, which is fixedly connected to the housing 100, and the snap ring 600 is fixedly connected to the fixing ring 700; the snap ring 600 is provided with a guide groove extending along the axial direction of the snap ring 600, and a part of the rotation firing button 4311 is provided in the guide groove, so that the rotation firing button 4311 can move relative to the housing 100 along the guide. It should be noted that a through groove corresponding to the guide groove is also provided on the housing 100, so as to facilitate the rotation firing button 4311 to move relative to the housing 100. The movement of the rotation firing button 4311 is guided by providing the guide groove on the housing 100 and the snap ring 600.

[0120] In one embodiment, if Fig.13As shown, the transmission assembly 410 further includes a third elastic member 4315, the two ends of which are respectively against the rotating firing push block 4314 and the housing 100; when the rotating firing push block 4314 slides along the rotating guide slot 4231, the third elastic member 4315 can be compressed to provide elastic force for the return of the rotating firing push block 4314. Specifically, when the rotating firing push block 4314 slides along the curved slot section 4231b, the third elastic member 4315 is compressed; when the rotating firing push block 4314 slides from the tail end of the curved slot section 4231b into the tail end of the straight slot section 4231a, the rotating firing push block 4314 can move from the tail end of the straight slot section 4231a to the head end of the straight slot section 4231a under the elastic force of the first elastic member 4313 and the third elastic member 4315. By configuring in this way, after the circular cutting of the tissue is completed, the elastic force of the third elastic member 4315 can push the rotating firing push block 4314 and the rotating firing button 4311 back to their original positions, thereby realizing the automatic return of the rotating firing push block 4314 and the rotating firing button 4311.

[0121] The working principle of the biopsy needle provided in the above embodiment is as follows (refer to Figures 10 to 14 Understand):

[0122] Since the structure of the biopsy needle provided in Example 2 is basically the same as that of the biopsy needle provided in Example 1, the difference lies in the different structure of the rotation transmission mechanism 400. Therefore, the loading and firing process of the biopsy needle is the same as that in Example 1 and will not be described in detail here. The rotation process is described in detail below:

[0123] After the biopsy needle is fired, the rotary firing button 4311 is moved along the guide grooves on the housing 100 and the bayonet ring toward the distal end of the housing 100, so that the cylindrical slider on the rotary firing push block 4314 can move along the curved groove section 4231b of the rod-shaped portion 423. This process causes the rotating member 420 to start rotating around its own axis, and drives the outer needle tube seat 300 and the inner needle tube seat 200 to rotate in the same direction, so that the inner needle tube 520 and the outer needle tube 530 start rotating along their own axis; at the same time, the third elastic member 4315 is compressed and accumulates elastic potential energy. During the rotation of the inner needle tube seat 200, the elastic blade 531 on the outer needle tube 530 that extends into the inner needle tube 520 will also rotate together, so that the sample tissue in the inner needle tube is separated from the surrounding tissue by the elastic blade 531. When the rotating firing push block 4314 passes over the groove bottom 4231d at the tail end of the curved groove section, the rotation ends, and the elastic potential energy stored in the third elastic member 4315 is released. The rotating firing push block 4314 moves toward the proximal end of the shell 100 under the action of the elastic force of the third elastic member 4315, thereby realizing the return of the rotating firing push block 4314 and the rotating firing button 4311.

[0124] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A biopsy needle, characterized in that: The biopsy needle comprises: A needle assembly, the needle assembly comprising an inner needle tube and an outer needle tube; A housing having a receiving cavity; An inner needle tube seat is disposed in the accommodating cavity, the inner needle tube seat can move relative to the shell, and the inner needle tube seat is fixedly connected to the inner needle tube; An outer needle tube seat is disposed in the accommodating cavity, the outer needle tube seat can move relative to the housing, the outer needle tube seat and the inner needle tube seat can move relative to each other, the outer needle tube seat is fixedly connected to the outer needle tube, and the outer needle tube is sleeved on the inner needle tube; A rotary transmission mechanism, disposed in the accommodating cavity and operable to rotate relative to the shell; Among them, after the inner needle tube seat and the outer needle tube seat move along the axis of the shell for a preset stroke to complete sampling and firing, they can be connected to the rotating transmission mechanism, so that the inner needle tube and the outer needle tube can rotate synchronously under the drive of the rotating transmission mechanism.

2. The biopsy needle according to claim 1, characterized in that: The rotary transmission mechanism comprises: A transmission assembly, movably connected to the housing; A rotating member is rotatably connected to the housing, the transmission assembly is transmission-connected to the rotating member, and both the inner needle tube seat and the outer needle tube seat can be connected to the rotating member; Wherein, when the transmission assembly moves relative to the housing along the axis of the housing, the transmission assembly can drive the rotating member to rotate relative to the housing; The rotating member is provided with an avoidance hole which penetrates the rotating member along the axial direction of the rotating member, and the avoidance hole is used for the needle assembly to pass through.

3. The biopsy needle according to claim 2, characterized in that: The rotary transmission mechanism further comprises: A driving assembly is connected to the housing, the driving assembly can be operably moved relative to the housing, and the driving assembly is connected to the transmission assembly to drive the transmission assembly to move relative to the housing.

4. The biopsy needle according to claim 3, characterized in that: The drive assembly includes a first drive assembly; the transmission assembly includes: A transmission screw, threadedly connected to the rotating member; A loading buckle is fixedly connected to the transmission screw, and when the loading buckle moves toward the proximal end of the shell by a preset stroke, the loading buckle can be engaged with the shell; Wherein, the first driving assembly can abut against the loading buckle to unlock the loading buckle after being engaged, so that the transmission screw can move relative to the housing.

5. The biopsy needle according to claim 4, characterized in that: The first driving assembly comprises: A rotating firing button, partly disposed outside the accommodating cavity; The rotary firing buckle is fixedly connected to the rotary firing button. The rotary firing buckle can be abutted against the loading buckle. When the rotary firing button is operably moved relative to the shell, the rotary firing buckle can apply a force to the loading buckle to disengage the loading buckle from the shell.

6. The biopsy needle according to claim 4, characterized in that: The first driving assembly comprises: A first elastic member, wherein the first elastic member is sleeved on the transmission screw, and two ends of the first elastic member are respectively against the housing and the chamber buckle; Wherein, when the chamber buckle is engaged with the housing, the first elastic member is compressed; After the clamping connection between the loading buckle and the shell is unlocked, the loading buckle moves toward the distal end of the shell under the action force of the first elastic member.

7. The biopsy needle according to claim 4, characterized in that: The drive assembly further includes a second drive assembly, wherein the second drive assembly includes: A rotating loading push block, wherein the rotating loading push block is movably connected to the shell, one end of the rotating loading push block abuts against the loading buckle, and the rotating loading push block can operably drive the loading buckle to move a preset stroke toward the proximal end of the shell so that the loading buckle is engaged with the shell.

8. The biopsy needle according to claim 7, characterized in that: The biopsy needle also includes: A loading slide block, part of which is disposed outside the accommodating cavity, and the part disposed inside the accommodating cavity can abut against the inner needle tube seat and the outer needle tube seat, and the loading slide block is also connected to the rotating loading push block to drive the rotating loading push block to move relative to the housing; When the loading slide block is operably moved, the loading slide block can push the inner needle tube seat and the outer needle tube seat to move to a preset distance relative to the shell and engage with the shell to achieve loading.

9. The biopsy needle according to claim 8, characterized in that: The biopsy needle also includes: An unlocking button is arranged at the proximal end of the shell, and is used to disengage the inner needle tube seat and the outer needle tube seat from the clamping connection with the shell, thereby realizing the firing of the inner needle tube and the outer needle tube.

10. The biopsy needle according to any one of claims 2 to 5, characterized in that: The proximal end of the rotating member is provided with two spaced-apart insertion keys; The outer needle tube seat and the inner needle tube seat are each provided with a slot corresponding to the insertion key, and the insertion key can be inserted into the slot.

11. The biopsy needle according to claim 2, characterized in that: The rotating member is provided with a rotation guide slot; the transmission assembly comprises: A rotating firing button, partly disposed outside the accommodating cavity, the rotating firing button being movably connected to the shell along the axis of the shell; A rotating firing push block is fixedly connected to the rotating firing button, and a portion of the rotating firing push block can be slidably disposed in the rotating guide slot; When the rotary firing button is pushed to move, the rotary firing push block moves along the guide slot, thereby converting the movement of the rotary firing button into the rotation of the rotating member relative to the shell.

12. The biopsy needle according to claim 11, characterized in that: The rotating parts include the interconnected: A disc-shaped portion, rotatably connected to the housing, and capable of being connected to the outer needle tube seat and the inner needle tube seat; The rod-shaped portion, the rotation guide slot is arranged on the outer peripheral surface of the rod-shaped portion.

13. The biopsy needle according to claim 12, characterized in that: The transmission assembly also includes: a third elastic member, two ends of which are respectively against the rotating firing push block and the housing; When the rotary firing push block slides along the rotary guide slot, the third elastic member can be compressed to provide elastic force for the return of the rotary firing push block.

Images