Biopsy needle

Abstract

Disclosed is a biopsy needle, comprising: an inner needle tube (120); an outer needle tube (130), sleeved outside the inner needle tube; a housing (200); an inner needle tube seat (400), movably disposed within the housing and fixedly connected to the inner needle tube; an outer needle tube seat (300), movably disposed within the housing and fixedly connected to the outer needle tube, the outer needle tube seat and the inner needle tube seat being capable of relative movement; and a rotational transmission mechanism (500), disposed within the housing, wherein the rotational transmission mechanism is operably rotatable relative to the housing, and is configured to drive synchronous rotation of the inner needle tube and the outer needle tube.

Description

biopsy needle

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311443250.8, filed on October 31, 2023, entitled “Biopsy Needle and Biopsy Device,” the entire text of which is hereby incorporated by reference.

[0003] This application claims priority to Chinese patent application number 202311810938.5, filed on December 25, 2023, entitled “Biopsy Needle,” the entire text of which is incorporated herein by reference.

[0004] This application claims priority to Chinese patent application number 202410162641.0, filed on February 5, 2024, entitled “BIOPSY NEEDLE,” the entire text of which is hereby incorporated by reference. Technical Field

[0005] The present application relates to the technical field of medical devices, and in particular to a biopsy needle. Background Art

[0006] In medical diagnosis, it is often necessary to perform a biopsy (biopsy) on cancer patients to obtain a portion of the tissue at the lesion site for pathological research. A biopsy is a procedure that involves puncturing a small amount of pathological tissue with a biopsy needle under the guidance of CT (computed tomography) images, ultrasound images, or MRI (magnetic resonance imaging) images for sampling and testing. In recent years, biopsy surgery has been mainly performed using a biopsy needle puncture. Due to its advantages of less trauma, less bleeding, and a high biopsy success rate, it has basically replaced the traditional surgical incision method.

[0007] Currently, during the puncture biopsy diagnostic process, a puncture device is required to cut and separate human tissue for sampling and analysis. When a full-core biopsy needle is used for sampling, the target tissue to be cut is temporarily stored in the chamber formed by the inner needle tube and the needle core. The shrapnel provided on the outer needle tube is then inserted into the inner needle tube to further cut the temporarily stored tissue, thereby obtaining the target sample that is completely separated from the tissue, and then the needle body is withdrawn. During this process, since the supplementary cutting by the shrapnel cannot completely ensure the cut, the sample may be entangled in the tissue and fall out of the needle tube, resulting in sampling failure. Therefore, some doctors will manually rotate the biopsy needle 1 to 2 times to ensure effective sampling. However, manual operation by the doctor is difficult. On the one hand, for puncture biopsy guided by ultrasound imaging, the doctor needs to operate the biopsy needle with one hand, and manual rotation of the biopsy needle is more difficult at this time. On the other hand, manual rotation has a wide range of impact on surrounding tissues.

[0008] Summary of the Invention

[0009] Based on this, the present application provides a biopsy needle.

[0010] In a first aspect, a biopsy needle is provided, comprising:

[0011] inner needle tube;

[0012] An outer needle tube is sleeved outside the inner needle tube;

[0013] case;

[0014] an inner needle tube seat, movably disposed in the housing, and fixedly connected to the inner needle tube;

[0015] an outer needle tube seat movably disposed in the housing, the outer needle tube seat being fixedly connected to the outer needle tube, and the outer needle tube seat and the inner needle tube seat being able to move relative to each other;

[0016] A rotary transmission mechanism is disposed in the housing;

[0017] The rotary transmission mechanism is operable to rotate relative to the housing to drive the inner needle tube and the outer needle tube to rotate synchronously.

[0018] In one embodiment, the rotary transmission mechanism is connected to the inner needle tube seat and the outer needle tube seat;

[0019] After the biopsy needle has completed sampling and firing, the inner needle tube and the outer needle tube are driven to rotate synchronously by controlling the rotary transmission mechanism.

[0020] In one embodiment, the rotation transmission mechanism includes:

[0021] an actuator, the actuator being rotatably connected to the housing;

[0022] a transmission assembly, the transmission assembly being in transmission connection with the actuator; and

[0023] A driving assembly drives the actuator to rotate through the transmission assembly.

[0024] In one embodiment, the actuator includes a rotating bracket, which is rotatable relative to the shell, and the outer needle tube seat and the inner needle tube seat can move relative to the rotating bracket along the axial direction of the rotating bracket, and the rotating bracket can drive the outer needle tube seat and the inner needle tube seat to rotate relative to the shell.

[0025] In one embodiment, the rotating bracket is configured with a key along one end of its axis, and the key is connected to the outer needle tube seat and / or the inner needle tube seat.

[0026] In one embodiment, the transmission assembly includes a moving member, which is movably arranged relative to the housing; the moving member is in transmission connection with the rotating bracket, and the driving assembly drives the rotating bracket to rotate through the moving member.

[0027] In one embodiment, a driving slot is provided on the peripheral side surface of the rotating bracket; and the transmission assembly further comprises:

[0028] a raised portion connected to the moving member, wherein a portion of the raised portion is slidably disposed in the driving chute;

[0029] When the moving member moves relative to the housing along the first direction, the protrusion slides along the track of the driving slide groove, thereby driving the rotating bracket to rotate around the axis of the housing.

[0030] In one embodiment, the drive assembly includes:

[0031] The first driving member has two ends respectively abutting against the moving member and the rotating bracket, and the first driving member can provide driving force for the moving member to move along the axial direction of the shell.

[0032] In one embodiment, the driving slot includes a curved slot segment, the moving member moves along the first direction, and the protrusion slides along the curved slot segment to drive the rotating bracket to rotate.

[0033] In one embodiment, the driving groove includes a straight groove segment extending along the axial direction of the rotating bracket, and a curved groove segment extending spirally around the axial direction of the rotating bracket, and two ends of the curved groove segment are correspondingly connected to two ends of the straight groove segment.

[0034] In one embodiment, the straight slot segment and the curved slot segment each include a head end and a tail end, the head end being an end facing the proximal end of the shell, and the tail end being an end facing the distal end of the shell;

[0035] A stop structure is provided at the head end of the straight groove segment and the tail end of the curved groove segment, or a stop structure is provided at the tail end of the straight groove segment and the head end of the curved groove segment; the stop structure is used to prevent the protrusion from retreating after the protrusion passes through the stop structure from one direction.

[0036] In one embodiment, the stop structure at the head end of the straight groove segment is a stepped structure formed by a groove bottom higher than the groove bottom at the head end of the curved groove segment, so that the protrusion is prevented from retreating after moving from the head end of the straight groove segment into the curved groove segment.

[0037] The stop structure at the tail end of the curved groove segment is a stepped structure formed by having a groove bottom higher than the tail end of the straight groove segment, so as to prevent the protrusion from retreating after the protrusion enters the tail end of the straight groove segment from the tail end of the curved groove segment;

[0038] Wherein, the groove bottoms of the curved groove section and the straight groove section are smooth surfaces.

[0039] In one embodiment, the raised portion comprises:

[0040] A support base is constructed with a receiving cavity having an open end, and the support base is fixedly connected to the moving part;

[0041] A second driving member is disposed in the accommodating cavity, with one end abutting against the supporting seat;

[0042] The movable member is movably disposed in the accommodating cavity and abuts against the other end of the second driving member. A portion of the movable member protrudes from the end surface of the supporting seat.

[0043] In one embodiment, the stop structure at the head end of the straight slot segment is a biasing member, and the biasing member is at least partially disposed in the straight slot segment. When the protrusion moves along the second direction past the biasing member, the biasing member is biased to avoid the protrusion. When the protrusion moves into the curved slot segment, the biasing member is reset, thereby preventing the protrusion from retreating.

[0044] The first direction is opposite to the second direction.

[0045] In one embodiment, the driving assembly includes an elastic assembly; the moving member includes:

[0046] A transmission screw, threadedly connected to the rotating bracket;

[0047] Wherein, two ends of the elastic component are respectively in contact with the rotating bracket and the transmission screw, so that the transmission screw can move relative to the housing.

[0048] In one embodiment, the movable member is provided with a first buckle, and after the movable member moves a first preset stroke along the axial direction of the shell toward the proximal end of the shell, the first buckle is engaged with the shell; the biopsy needle further includes:

[0049] The first unlocking member is movably connected to the shell. The first unlocking member is operably connected to the first buckle and is used to operably drive the first buckle to disengage from the shell.

[0050] In one embodiment, the biopsy needle further comprises a loading mechanism, wherein the loading mechanism comprises:

[0051] a loading trigger rotatably connected to the housing;

[0052] a driving rod movably disposed in the housing and in transmission connection with the loading trigger, wherein the driving rod is driven to move along the axis of the housing by the rotation of the loading trigger;

[0053] In which, the driving rod is constructed with a first stop block and a second stop block spaced apart along the extension direction of the driving rod, the first stop block is used to connect with the moving part, and the second stop block is used to connect with the outer needle tube seat and / or the inner needle tube seat, and the driving rod is driven to move along the axis of the shell by the rotation of the loading trigger, thereby driving the moving part to move and driving the outer needle tube seat and / or the inner needle tube seat to move.

[0054] In one embodiment, a travel avoidance groove is provided on the movable member, and the first stopper is provided in the travel avoidance groove, so that after the driving rod moves a second preset stroke under the drive of the loading trigger, the first stopper forms abutment with the movable member, thereby driving the movable member to move.

[0055] In one embodiment, a second buckle is provided on the outer needle tube seat and / or the inner needle tube seat, and after the outer needle tube seat and / or the inner needle tube seat moves a third preset stroke toward the proximal end of the shell, the second buckle is engaged with the shell.

[0056] In one embodiment, a card slot is provided on the circumferential side surface of the outer needle tube seat and / or the inner needle tube seat, and a card engaging protrusion is provided on the inner wall of the shell. When the second buckle is engaged with the shell, the card engaging protrusion is engaged in the card slot.

[0057] In one embodiment, the biopsy needle further comprises a needle core and a needle core seat, wherein the needle core seat is fixedly connected to the proximal end of the housing, the needle core is fixedly connected to the needle core seat, and a first guide portion is provided at one end of the needle core seat facing the distal end of the housing;

[0058] A second guide portion is provided at one end of the inner needle tube seat or the outer needle tube seat toward the proximal end of the shell. When the second buckle is engaged with the shell, the first guide portion is cooperatively connected with the second guide portion.

[0059] In one embodiment, the biopsy needle further includes a shift mechanism, and the shift mechanism includes:

[0060] a first shifting member, the first shifting member being slidably connected to the inserting key and being used to limit the moving positions of the inner needle tube seat and the outer needle tube seat;

[0061] a second shift member movably disposed in the housing and rotatably connected to the first shift member, wherein movement of the second shift member can control a position of the first shift member relative to the insertion key;

[0062] A gear shift button is provided on the housing and is connected to the second shift member. The gear shift button is operable to move relative to the housing so as to control the position of the first shift member through the second shift member.

[0063] In one embodiment, the drive assembly is operable. After the inner needle tube seat and the outer needle tube seat are fired to complete sampling, the drive assembly is operated to operably drive the rotary transmission mechanism multiple times, thereby realizing multiple synchronous rotations of the inner needle tube seat and the outer needle tube seat.

[0064] In one embodiment, the driving assembly is movably or rotatably disposed on the housing, and the transmission assembly includes a gear set. The driving assembly is transmission-connected to the rotating bracket via the gear set to drive the rotating bracket to rotate.

[0065] In one embodiment, the driving assembly includes a pressing assembly and a sector gear, wherein the pressing assembly is connected to the sector gear, and pressing the pressing assembly can drive the sector gear to rotate;

[0066] The gear set includes a first transmission gear and a second transmission gear, the first transmission gear is in transmission connection with the sector gear, one end of the rotating bracket is provided with a third transmission gear, and the second transmission gear is in transmission connection with the third transmission gear.

[0067] In one embodiment, the pressing assembly includes a pressing member and an elastic member connected to each other, the pressing member is connected to the sector gear, and the elastic member is used to accumulate elastic potential energy when the pressing member is pressed, so as to drive the pressing member to reset when the pressing member is released; the shell is provided with an opening, and at least part of the pressing assembly extends to the outside of the shell through the opening.

[0068] In one embodiment, the rotation transmission mechanism has a preset transmission ratio, and the operation of the drive assembly can at least enable the rotation angle of the rotating bracket in any rotation direction to be no less than 360° through the transmission assembly.

[0069] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without any creative work.

[0071] FIG1 is a schematic diagram of the external structure of a biopsy needle provided in some embodiments of the present application;

[0072] FIG2 is a partially enlarged schematic diagram of a needle assembly in a biopsy needle provided in some embodiments of the present application;

[0073] FIG3 is a schematic diagram of the external structure of a biopsy needle provided in some embodiments of the present application from another perspective;

[0074] FIG4 is a partially enlarged schematic diagram of a biopsy needle being fired for sampling according to some embodiments of the present application;

[0075] FIG5 is a schematic diagram of the external structure of a loaded biopsy needle provided by some embodiments of the present application;

[0076] FIG6 is a schematic diagram of the internal structure of a loaded biopsy needle according to some embodiments of the present application;

[0077] FIG7 is a schematic diagram of the internal structure of a biopsy needle provided by some embodiments of the present application when the needle is not loaded;

[0078] FIG8 is a schematic structural diagram of a rotary transmission mechanism in a biopsy needle provided in some embodiments of the present application;

[0079] FIG9 is a cross-sectional view of a rotary transmission mechanism in a biopsy needle provided in some embodiments of the present application;

[0080] FIG10 is an exploded view of a rotary transmission mechanism in a biopsy needle provided in some embodiments of the present application;

[0081] FIG11 is a schematic structural diagram of a raised portion in a rotary transmission mechanism in a biopsy needle provided in some embodiments of the present application;

[0082] FIG12 is a schematic structural diagram of a raised portion in a rotary transmission mechanism in a biopsy needle provided in other embodiments of the present application;

[0083] FIG13 is a schematic diagram of the explosion of a protrusion in a rotary transmission mechanism in a biopsy needle according to other embodiments of the present application;

[0084] FIG14 is a cross-sectional view of a rotation transmission mechanism of a biopsy needle provided by some embodiments of the present application when the biopsy needle is not loaded;

[0085] FIG15 is a schematic structural diagram of a rotating transmission mechanism after a biopsy needle is loaded, provided in some embodiments of the present application;

[0086] FIG16 is a front view of a rotation transmission mechanism of a biopsy needle provided in some embodiments of the present application when the biopsy needle is not loaded;

[0087] FIG17 is a front view of a rotating transmission mechanism after a biopsy needle is loaded, according to some embodiments of the present application;

[0088] FIG18 is a schematic diagram of a partial structure of a rotating support in a biopsy needle provided in some embodiments of the present application;

[0089] FIG19 is a front view of a rotation transmission mechanism of a biopsy needle provided in some other embodiments of the present application when the biopsy needle is not loaded;

[0090] FIG20 is a schematic diagram of the external structure of a raised portion in a rotation transmission mechanism of a biopsy needle provided in other embodiments of the present application;

[0091] FIG21 is a schematic diagram of an exploded structure of a protrusion in a rotation transmission mechanism of a biopsy needle provided in other embodiments of the present application;

[0092] FIG22 is a schematic structural diagram of a biopsy needle rotation transmission mechanism according to some embodiments of the present application, in which a locking lever arm is used to stop a protruding portion;

[0093] FIG23 is a schematic diagram of an explosion of a protrusion stopped by a first spring in a rotation transmission mechanism of a biopsy needle according to some embodiments of the present application;

[0094] FIG24 is a cross-sectional schematic diagram of a rotation transmission mechanism of a biopsy needle according to some embodiments of the present application, wherein a first elastic sheet is used to stop a protruding portion;

[0095] FIG25 is a cross-sectional view of a first spring plate used to stop a raised portion in a rotation transmission mechanism after a biopsy needle is loaded, according to some embodiments of the present application;

[0096] FIG26 is a cross-sectional view of a first spring sheet used to stop a raised portion in a rotation transmission mechanism when a biopsy needle is not loaded, according to some embodiments of the present application;

[0097] FIG27 is a schematic structural diagram of the cooperation between the drive rod, the rotary transmission mechanism, and the inner and outer needle tube seats in a biopsy needle provided in some embodiments of the present application;

[0098] FIG28 is a schematic diagram of the structure of the inner and outer needle tube seats in the biopsy needle provided in some embodiments of the present application;

[0099] FIG29 is a schematic diagram of the structure of the inner and outer needle holders and the housing of a biopsy needle provided in some embodiments of the present application when the inner and outer needle holders and the housing are mutually restricted by the engaging protrusions and the engaging grooves;

[0100] FIG30 is a schematic diagram of the structure of the cooperation between the rotating support and the housing of the biopsy needle provided in some embodiments of the present application;

[0101] FIG31 is a schematic structural diagram of the guiding mating portion between the outer needle tube seat and the needle core seat of a biopsy needle provided in some embodiments of the present application;

[0102] FIG32 is a partial structural diagram of a biopsy needle provided in some embodiments of the present application;

[0103] FIG33 is a schematic diagram of the internal structure of a biopsy needle (with sampling and firing not yet completed) provided in some embodiments of the present application;

[0104] FIG34 is a schematic diagram of the internal structure of a biopsy needle (after completing sampling and firing) provided in some embodiments of the present application;

[0105] FIG35 is a schematic diagram of the internal structure of a biopsy needle after firing, provided by some embodiments of the present application;

[0106] FIG36 is a schematic structural diagram of a rotation transmission mechanism of a biopsy needle provided in some embodiments of the present application;

[0107] FIG37 a is a schematic diagram showing the external positions of a biopsy needle according to some embodiments of the present application;

[0108] FIG37 b is a schematic diagram illustrating the internal structure of a biopsy needle in various positions according to some embodiments of the present application;

[0109] FIG38 a is a schematic diagram of the external visualization of the gear positions of a biopsy needle provided by some embodiments of the present application;

[0110] FIG38 b is a schematic diagram illustrating the internal structure of a biopsy needle in various positions according to some embodiments of the present application;

[0111] FIG39 is a schematic structural diagram of a one-touch firing method of a biopsy needle provided in some embodiments of the present application.

[0112] Reference numerals: Needle assembly 100; needle core 110; inner needle tube 120; outer needle tube 130; second spring piece 131; housing 200; snap-fit ​​protrusion 210; annular groove 220; outer needle tube seat 300; second snap 310; snap groove 320; inner needle tube seat 400; guide channel 410; rotary transmission mechanism 500; rotary bracket 510; key 511; driving slide 512; straight groove section 5121; first limiting step 5121a; curved groove section 5122; second limiting step 5122a; snap arm 513; flange 514; movable Component 520; accommodating groove 521; first buckle 522; travel avoidance groove 523; protrusion 530; support seat 531; second driving component 532; movable component 533; first driving component 540; first elastic piece 550; connecting portion 551; transition portion 552; stopper 553; first unlocking component 600; connecting rod 610; first unlocking button 620; second unlocking button 630; loading mechanism 700; loading trigger 710; driving rod 720; first stopper 721; second stopper 722; guide protrusion 723; rotating shaft 73 0; shift mechanism 800; gear shift button 810; first shift member 820; third driving member 910; needle core seat 920; guide boss 921; driving assembly 251; pressing assembly 2511; sector gear 2512; rotating shaft 2513; gear set 252; first transmission gear 2521; second transmission gear 2522; transition member 253; boss 2531; stop surface 2533; transmission member 254; third transmission gear 2541; pressing member 5111; elastic member 5112; opening 201; adjusting member 260 ; button 261; mating part 262; limiting hole 202; limiting part 203; slide groove 2532; transmission assembly 3410; transmission screw 3411; loading buckle 3412; rotating firing button 4311; rotating firing buckle 4312; first elastic member 4313; elastic assembly 3431; loading push block 4321; loading slide block 3810; third buckle 3210; limiting block 3110; slot 3521; fixing ring 3700; bearing 3800; button 3830; gear window 00; firing sampling button 401. DETAILED DESCRIPTION

[0113] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0114] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0115] In the description of the present application, 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0116] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0117] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0118] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0119] 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 an intermediate 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 an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0120] 1 to 7 , one embodiment of the present application provides a biopsy needle, comprising: an inner needle tube 120; an outer needle tube 130 sleeved over the inner needle tube 120; a housing 200; an inner needle tube seat 400 movably disposed within the housing 200 and fixedly connected to the inner needle tube 120; an outer needle tube seat 300 movably disposed within the housing 200 and fixedly connected to the outer needle tube 130, with the outer needle tube seat 300 and the inner needle tube seat 400 being capable of relative movement; and a rotary transmission mechanism 500 disposed within the housing 200. The rotary transmission mechanism 500 is operable to rotate relative to the housing 200, thereby driving the inner needle tube 120 and the outer needle tube 130 to rotate synchronously.

[0121] The inner needle tube 120 and the outer needle tube 130 are used to cut and separate the sample tissue in the sampling space, thereby achieving the purpose of sampling. The housing 200 is used to accommodate the inner needle tube seat 400, the outer needle tube seat 300 and other components.

[0122] In some examples, the biopsy needle further includes a core needle. The housing 200 is further configured to securely connect the core needle 110, thereby securing the core needle 110 relative to the housing 200. Since the inner needle tube 120 is sleeved onto the core needle 110, the inner needle tube seat 400 secures the inner needle tube 120 and allows the inner needle tube seat 400 to move relative to the housing 200, thereby allowing the inner needle tube 120 to move relative to the core needle 110, thereby allowing the hollow area between the inner needle tube 120 and the core needle 110 to be filled with sample tissue.

[0123] In some examples, the inner needle tube 120 is sleeved on the needle core 110 , the outer needle tube 130 is sleeved on the inner needle tube seat 400 , and the needle core 110 , the inner needle tube 120 and the outer needle tube 130 are coaxially arranged.

[0124] In some examples, a spring piece or a cutting blade may be provided on the outer needle tube 130, and a hole or a slot may be provided on the inner needle tube 120. Since the outer needle tube 130 is sleeved on the inner needle tube 120, the outer needle tube 130 is fixedly connected to the outer needle tube seat 300, and the outer needle tube seat 300 can move relative to the housing 200, the outer needle tube seat 300 and the inner needle tube seat 400 can move relative to each other, thereby enabling the outer needle tube 130 to move relative to the inner needle tube 120, so that the spring piece (or cutting blade) on the outer needle tube 130 can pass through the slot (or cutting hole) on the inner needle tube 120 and enter the interior of the inner needle tube 120, so that the outer needle tube 130 can cut the target tissue between the inner needle tube 120 and the needle core 110.

[0125] In some examples, a spring piece or a cutting blade may be provided on the inner needle tube 120, and a hole or a slot may be provided on the outer needle tube 130. By relative movement between the inner needle tube 120, the outer needle tube 130, and the housing 200, the spring piece (or cutting blade) on the inner needle tube 120 may pass through one slot (or cutting hole) on the outer needle tube 130 and then pass through another slot (or cutting hole) into the outer needle tube 130, so that the spring piece (or cutting blade) on the inner needle tube 120 can cut the target tissue between the inner needle tube 120 and the outer needle tube 130.

[0126] In the embodiment of the present application, a rotary transmission mechanism 500 is provided in the housing 200, and the rotary transmission mechanism 500 is operable to rotate relative to the housing 200. The rotary transmission mechanism 500 drives the inner needle tube 120 and the outer needle tube 130 to rotate synchronously, so that after the biopsy needle completes sampling and firing, the inner needle tube 120 and the outer needle tube 130 can rotate relative to the needle core 110. During the rotation of the inner needle tube 120 and the outer needle tube 130, the springs (or cutting blades) on the outer needle tube 130 or the inner needle tube 120 also rotate together to perform an annular cutting on the sample tissue in the inner needle tube 120. With the above structural form, the tissue that is not cut by the linear cutting can be cut again by the needle tube rotation cutting method, so as 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 during removal, which may cause some unnecessary tissue damage. Moreover, through the rotating transmission mechanism 500, after the firing is completed, the inner and outer needle tubes 130 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 manual operation of the overall rotation of the biopsy needle, thereby avoiding the risk of secondary damage to surrounding important organs and increased puncture wounds, greatly improving safety, and reducing the patient's pain.

[0127] In one embodiment, the biopsy needle includes a needle assembly 100, which includes an inner needle tube 120 and an outer needle tube 130; the shell 200 has a accommodating cavity; the inner needle tube seat 400 is disposed in the accommodating cavity, and the inner needle tube seat 400 can move relative to the shell 200; the outer needle tube seat 300 is disposed in the accommodating cavity, and the outer needle tube seat 300 can move relative to the shell 200; and the rotary transmission mechanism 500 is disposed in the accommodating cavity.

[0128] The needle assembly 100 is used to cut and separate the sample tissue in the sampling space, thereby achieving the purpose of sampling.

[0129] In one embodiment, a rotary transmission mechanism 500 is connected to the inner needle tube seat 400 and the outer needle tube seat 300. When the biopsy needle completes sampling and firing, the rotary transmission mechanism 500 is controlled to drive the inner needle tube 120 and the outer needle tube 130 to rotate synchronously. A second elastic piece 131 can be provided on the outer needle tube 130. Since the outer needle tube 130 is sleeved on the inner needle tube 120, the outer needle tube 130 is fixedly connected to the outer needle tube seat 300, and the outer needle tube seat 300 can move relative to the housing 200. The outer needle tube seat 300 and the inner needle tube seat 400 can move relative to each other, thereby enabling the outer needle tube 130 to move relative to the needle core 110 and the inner needle tube 120, so that the second elastic piece 131 on the outer needle tube 130 can pass through the slot on the inner needle tube 120 and enter the interior of the inner needle tube 120, allowing the outer needle tube 130 to cut the target tissue between the inner needle tube 120 and the needle core 110. Alternatively, when the second spring piece 131 is provided on the inner needle tube 120 and a slot is provided on the outer needle tube 130, the relative movement between the inner needle tube 120, the outer needle tube 130 and the shell 200 can enable the second spring piece 131 on the inner needle tube 120 to pass through a slot on the outer needle tube 130 and then pass into the outer needle tube 130 from another slot, so that the second spring piece 131 on the inner needle tube 120 can cut the target tissue between the inner needle tube 120 and the outer needle tube 130. By arranging a rotary transmission mechanism 500 in the accommodating cavity of the shell 200, and the rotary transmission mechanism 500 can be operably rotated relative to the shell 200, so that after the biopsy needle completes sampling and firing, for example, the inner needle tube seat 400 and the outer needle tube seat 300 respectively move a preset stroke along the axis of the shell 200 to complete sampling and firing, both can be connected to the rotary transmission mechanism 500, so that the inner needle tube 120 and the outer needle tube 130 are driven to rotate synchronously through the rotary transmission mechanism 500, thereby making the inner needle tube 120 and the outer needle tube 130 able to rotate relative to the needle core 110. During the rotation process of the inner needle tube 120 and the outer needle tube 130, the second elastic piece 131 on the outer needle tube 130 extending into the inner needle tube 120 will also rotate together to perform annular cutting on the sample tissue in the inner needle tube 120. In the present application, the rotary transmission mechanism 500 is connected to the inner needle tube seat 400 and the outer needle tube seat 300 so that the rotary transmission mechanism 500 is always connected to the inner needle tube seat 400 and the outer needle tube seat 300 during and after the firing of the biopsy needle, thereby improving the reliability of the rotary transmission mechanism 500 in driving the inner needle tube seat 400 and the outer needle tube seat 300 to rotate relative to the housing 200.

[0130] As shown in Figures 1 to 5, in one embodiment, the distal end of the inner needle tube 120 has a cutting edge structure, which can cut human tissue. A groove is provided on the side wall of the inner needle tube 120 and passes through the side wall of the inner needle tube 120; the distal end of the outer needle tube 130 is provided with a second spring piece 131. When the outer needle tube 130 moves relative to the inner needle tube 120 along the axis of the needle assembly 100, the second spring piece 131 can pass through the groove on the inner needle tube 120 and enter the interior of the inner needle tube 120 to cut the tissue between the inner needle tube 120 and the needle core 110.

[0131] In another embodiment, the structures of the inner and outer needle tubes 120 and 130 remain unchanged, except for a difference in structure. Specifically, the inner needle tube 120 is provided with a second spring 131, and the outer needle tube 130 is provided with two spaced-apart slots. The second spring 131 passes through the slots from the inside of the outer needle tube 130 and rests on the tube wall between the two slots. The second spring 131 is constructed in an arcuate structure. When the inner needle tube 120 moves relative to the outer needle tube 130, the second spring 131 can enter the outer needle tube 130 through the slot near the distal end of the outer needle tube 130 to cut the target tissue between the inner and outer needle tubes 120 and 130.

[0132] It should be noted that, in this application, for a biopsy needle, the proximal end refers to the end closest to the operator's operating end, and the distal end refers to the end away from the operator's operating end. The distal end of the needle core 110, inner needle tube 120, and outer needle tube 130 refers to the end away from the operating end. The inner needle tube seat 400 and outer needle tube seat 300 are disposed within the housing 200 at the proximal end, and the rotary transmission mechanism 500 is disposed within the housing 200 at the distal end.

[0133] In one embodiment, the rotary transmission mechanism includes: an actuator rotatably connected to the housing 200; a transmission assembly transmission-connected to the actuator; and a drive assembly driving the actuator to rotate via the transmission assembly.

[0134] When the driving assembly drives the transmission assembly, the transmission assembly can drive the actuator to rotate. The actuator can rotate relative to the housing 200 to drive the outer needle tube seat 300 and the inner needle tube seat 400 to rotate relative to the housing 200.

[0135] As shown in Figures 6, 7, 9, 10, etc., in one embodiment, the actuator includes a rotating bracket 510, which can be rotatably arranged relative to the shell 200, and the outer needle tube seat 300 and the inner needle tube seat 400 can move relative to the rotating bracket 510 along the axial direction of the rotating bracket. The rotating bracket 510 can drive the outer needle tube seat 300 and the inner needle tube seat 400 to rotate relative to the shell 200.

[0136] In one embodiment, a key 511 is configured at one end of the rotating bracket 510 along its axis, and the key 511 is connected to the outer needle tube seat 300 and / or the inner needle tube seat 400 .

[0137] The rotating bracket 510 is connected to the inner needle tube seat 400 and the outer needle tube seat 300 by providing a key 511 on the rotating bracket 510 and connecting the key 511 to the outer needle tube seat 300 and / or the inner needle tube seat 400. It should be noted that the key 511 extends along the axial direction of the rotating bracket 510, and the inner needle tube seat 400 and the outer needle tube seat 300 can move relative to the key 511. The inner needle tube seat 400 and the outer needle tube seat 300 are always connected to the key during the loading and firing process, thereby allowing the inner needle tube seat 400 and the outer needle tube seat 300 to successfully complete the loading and firing process. At the same time, the inner needle tube seat 400 and the outer needle tube seat 300 can rotate relative to the housing 200 under the drive of the rotating bracket 510. Specifically, the key 511 can be provided on the rotating bracket 510 by an integral molding method, or it can be provided on the rotating bracket 510 by an adhesive method.

[0138] In one embodiment, the rotating bracket 510 includes two spaced apart insertion keys 511 ; the two insertion keys 511 are respectively inserted into slots on the outer needle tube seat 300 and the inner needle tube seat 400 .

[0139] By providing the insertion keys 511 on the rotating bracket 510, when the outer needle tube seat 300 and the inner needle tube seat 400 are fired, that is, when the outer needle tube seat 300 and the inner needle tube seat 400 move a preset distance along the axis of the housing 200 toward the distal end of the housing 200, the two insertion keys 511 are respectively inserted into the slots on the inner needle tube seat 400 and the outer needle tube seat 300, thereby achieving the connection between the rotating bracket 510 and the inner needle tube seat 400 and the outer needle tube seat 300. As a result, the outer needle tube seat 300, the inner needle tube seat 400 and the rotating bracket 510 are relatively fixed, so that when the rotating bracket 510 rotates relative to the housing 200, the outer needle tube seat 300 and the inner needle tube seat 400 can be driven to rotate relative to the housing 200.

[0140] In some examples, two keys 511 may be provided at the proximal end of the rotating bracket 510 , and two slots may be provided at the distal end of the outer needle tube seat 300 and the distal end of the inner needle tube seat 400 , respectively.

[0141] As shown in Figure 30, it is understood that the rotating bracket 510 can only rotate relative to the housing 200 and cannot move relative to the housing 200 along the axis of the housing 200. In this embodiment, two spaced flanges 514 are provided on the outer circumference of the end of the rotating bracket 510 near the key 511. The housing 200 is provided with an annular groove 220 corresponding to the two flanges 514, and the flanges 514 are embedded in the annular groove 220. This arrangement enables the rotating bracket 510 to rotate relative to the housing 200 and to limit the rotating bracket 510 and the housing 200 in the axial direction.

[0142] In some embodiments, the rotating bracket 510 is rotatably connected to the housing 200 via a bearing 3800 (see FIG. 39 for the bearing 3800 ).

[0143] In one embodiment, the transmission assembly includes a moving member 520 , which is movably arranged relative to the housing 200 ; the moving member 520 is in transmission connection with the rotating bracket 510 , and the driving assembly drives the rotating bracket 510 to rotate via the moving member.

[0144] Under the action of the driving assembly driving the moving member 520, the moving member 520 can drive the rotating bracket 510 to rotate. The rotating bracket 510 can rotate relative to the housing 200 to drive the outer needle tube seat 300 and the inner needle tube seat 400 to rotate relative to the housing 200.

[0145] As shown in Figures 8, 16, and 18, in one embodiment, a driving slot 512 is provided on the peripheral side surface of the rotating bracket 510; the transmission assembly includes a protrusion 530, the protrusion 530 is connected to the moving member 520, and a portion of the protrusion 530 is slidably provided in the driving slot 512; wherein, when the moving member 520 moves relative to the housing 200 in a first direction, the protrusion 530 slides along the trajectory of the driving slot 512, thereby driving the rotating bracket 510 to rotate around the axis of the housing 200. The first direction is the direction in which the moving member 520 moves along the axial direction of the housing 200 toward the distal end of the housing 200. In some examples, the moving member 520 is movably provided relative to the housing 200 and is in transmission connection with the rotating bracket 510.

[0146] The movable member 520 is configured to be movable relative to the housing 200 and is in transmission connection with the rotating bracket 510, so that the protrusion 530 moves with the movable member 520. During the process of the protrusion 530 sliding along the trajectory of the drive chute 512 on the rotating bracket 510, the rotating bracket 510 is pushed to rotate relative to the housing 200 under the action of the protrusion 530, thereby driving the inner needle tube seat 400 and the outer needle tube seat 300 to rotate relative to the housing 200. Specifically, the movable member 520 is configured to be a generally cylindrical structure, and the movable member 520 is at least partially sleeved on the rotating bracket 510, and the movable member 520 is movable along the axis of the rotating bracket 510.

[0147] As shown in Figures 1, 3, 5 to 7 and 27, in one embodiment, the biopsy needle further includes a loading mechanism 700, which includes a loading trigger 710, which is rotatably connected to the housing 200; a driving rod 720 is movably disposed in the housing 200 and is in transmission connection with the loading trigger 710, and the driving rod 720 is driven to move along the axis of the housing 200 by the rotation of the loading trigger 710; wherein, the driving rod 720 is configured with a first stopper 721 and a second stopper 722 spaced apart along the extending direction of the driving rod 720, the first stopper 721 being used to connect with the moving member 520, and the second stopper 722 being used to connect with the outer needle tube seat 300 and / or the inner needle tube seat 400, and the driving rod 720 is driven to move along the axis of the housing 200 by the rotation of the loading trigger 710, thereby driving the moving member 520 to move and driving the outer needle tube seat 300 and / or the inner needle tube seat 400 to move.

[0148] Specifically, the loading trigger 710 is rotatably connected to the housing 200 via a rotating shaft 730. The loading trigger 710 is provided with a guide groove. One end of the driving rod 720 is provided with a guide protrusion 723. The guide protrusion 723 is movably disposed in the guide groove. When the loading trigger 710 rotates about the rotating shaft 730, the driving rod 720 moves along the axis of the housing 200 under the pulling force of the loading trigger 710. The first stopper 721 on the driving rod 720 applies a force to the movable member 520 to push the movable member 520 to move along the housing 200. The second stopper 722 on the driving rod 720 applies a force to the outer needle tube seat 300 and / or the inner needle tube seat 400 to push the outer needle tube seat 300 and the inner needle tube seat 400 to move simultaneously relative to the housing 200, thereby achieving the loading of the biopsy needle.

[0149] As shown in Figures 6, 7, 8 and 19, in one embodiment, a first buckle 522 is provided on the movable member 520. After the movable member 520 moves a first preset stroke along the axial direction of the shell 200 toward the proximal end of the shell 200, the first buckle 522 is engaged with the shell 200; the biopsy needle also includes a first unlocking member 600, which is movably connected to the shell 200 and is operably connected to the first buckle 522 for operably driving the first buckle 522 to disengage from the shell 200.

[0150] During the loading process, after the moving member 520 is pushed by the first stopper 721 on the driving rod 720 to move a first preset stroke along the axial direction of the housing 200 , the first buckle 522 on the moving member 520 is engaged with the housing 200 .

[0151] It should be noted that the rotary transmission mechanism 500 further includes a first driving member 540, which is specifically a spring. The two ends of the first driving member 540 respectively abut against the moving member 520 and the rotating bracket 510. The first driving member 540 can provide a driving force for the axial movement of the moving member 520 along the housing 200. In the process of the driving rod 720 driving the moving member 520 and the housing 200 to move toward the proximal end of the housing 200, the first driving member 540 is compressed under the force of the moving member 520 moving in the second direction, wherein the second direction is opposite to the first direction; when the first buckle 522 is engaged with the housing 200, the compressed first driving member 540 stores elastic potential energy, providing kinetic energy for driving the moving member 520 to move relative to the housing 200 along the first direction.

[0152] In some embodiments, please refer to Figure 39, when the rotating bracket 510 is rotatably connected to the shell 200 through the bearing 3800, one end of the first driving member 540 abuts against the moving key 520, and the other end of the first driving member 540 abuts against the outer ring of the bearing 3700, so that the rotation of the rotating bracket 510 will not affect the telescopic movement of the first driving member, or the telescopic movement of the first driving member will not affect the rotation of the rotating bracket 510.

[0153] Because the moving member 520 causes the first snap 522 to engage with the housing 200 under the force of the driving rod 720, the rotary transmission mechanism 500 is always in a locked state when the first snap 522 is not subjected to external forces. In this embodiment, the first unlocking member 600 is movably connected to the housing 200. When a force is applied to the first unlocking member 600, the first unlocking member 600 applies a force to the first snap 522 so that the first snap 522 and the housing 200 are disengaged, thereby achieving the unlocking of the rotary transmission mechanism 500. After being unlocked, the moving member 520 in the rotary transmission mechanism 500 moves along the first direction of the housing 200 under the restoring force of the first spring, thereby driving the rotary bracket 510 to rotate relative to the housing 200 through the moving member 520.

[0154] Specifically, the first unlocking member 600 includes a connecting rod 610, a first unlocking button 620 and a second unlocking button 630. The two unlocking buttons are respectively connected to the two ends of the connecting rod 610. The first unlocking button 620 is exposed at the proximal end of the shell, and the second unlocking button 630 is exposed at the shell at the position where the first buckle is engaged with the shell 200; the second unlocking button 630 rests on the first buckle. The first latch 522 has an inclined surface on the side facing the second unlocking button 630. When the second unlocking button 630 is manually pressed, the second unlocking button 630 can exert a force on the first latch 522, causing the first latch 522 to move toward the axis of the housing 200, thereby disengaging the first latch 522 from the housing 200. Of course, the first unlocking button 620 can also be pressed from the proximal end of the housing 200 to cause the connecting rod 610 to move along the axis of the housing 200 toward the distal end of the housing 200. In this case, the second unlocking button 630 can also exert a force on the first latch 522 to unlock the first latch 522. By configuring the first unlocking member 600 to be pressable from both the proximal and distal ends of the housing 200 to unlock the rotary transmission mechanism 500, the convenience of unlocking the rotary transmission mechanism 500 is improved, thereby adapting to the operating preferences of different operators.

[0155] As shown in FIG18 , in one embodiment, the driving chute 512 includes a curved slot section 5122. The moving member 520 moves along a first direction, and the protrusion 530 slides along the curved slot section 5122 to drive the rotating bracket 510 to rotate. The driving chute 512 is configured to include the curved slot section 5122, so that when the moving member 520 moves relative to the housing 200 along the first direction, the protrusion 530 sliding within the curved slot section 5122 applies a force to the rotating bracket 510, thereby pushing the rotating bracket 510 to rotate forward relative to the housing 200. When the moving member 520 moves relative to the housing 200 along a second direction, the protrusion 530 sliding within the curved slot section 5122 applies a force to the rotating bracket 510, thereby pushing the rotating bracket 510 to rotate counterclockwise relative to the housing 200. In this embodiment, the running trajectory of the curved slot section 5122 can be spiral or can be other curved forms.

[0156] As shown in Figure 18, in another embodiment, the driving chute 512 comprises a straight line groove section 5121 extending axially along the rotating bracket 510, and a curved groove section 5122 extending in a spiral manner axially around the rotating bracket 510, and the two ends of the curved groove section 5122 are correspondingly communicated with the two ends of the straight line groove section 5121. In other words, the curved groove section 5122 forms a closed driving chute 512 after being connected with the straight line groove section 5121. When the straight line groove section 5121 extending axially along the rotating bracket 510 is used to realize that when the moving of the driving rod 720 relative to the housing 200 moves, the movement of the moving member 520 is guided. And the curved groove section 5122 is used for after the rotary transmission mechanism 500 is unlocked, when the protrusion 530 slides along the curved groove section 5122, the relative housing 200 of the rotating bracket 510 is driven by the protrusion 530 to rotate. It should be noted that during the entire process, since the moving part 520 can only move along the axis of the shell 200 and cannot rotate relative to the shell 200, the moving part 520 moves toward the far end of the shell 200 under the elastic restoring force of the first driving part 540, that is, moves in the first direction, and the protrusion 530 drives the rotating bracket 510 to rotate through the curved groove section 5122 as the moving part 520 moves along the axis of the shell 200.

[0157] In one embodiment, the straight groove segment 5121 and the curved groove segment 5122 both include a head end and a tail end, the head end being the end facing the proximal end of the shell 200, and the tail end being the end facing the distal end of the shell 200; a stop structure is provided at the head end of the straight groove segment 5121 and the tail end of the curved groove segment 5122, or a stop structure is provided at the tail end of the straight groove segment 5121 and the head end of the curved groove segment 5122; wherein the stop structure is used to prevent the protrusion 530 from retreating after the protrusion 530 passes through the stop structure from one direction.

[0158] By providing a stop structure to block the protrusion 530, the protrusion 530 is restricted from retreating when moving in one direction in the driving groove 512, so that the protrusion 530 can only move in one direction in the driving groove 512, thereby ensuring that the rotating bracket 510 can only rotate in one direction relative to the shell 200, thereby ensuring reliability during tissue cutting.

[0159] It should be understood that there is no limitation on the specific structure of the stop structure. Specifically, the stop structure may adopt the following structural forms:

[0160] As shown in Figures 8 to 18, in one embodiment, the stop structure at the head end of the straight groove segment 5121 is a stepped structure formed by the bottom of the groove being higher than the bottom of the head end of the curved groove segment 5122, so that the protrusion 530 is prevented from retreating after moving from the head end of the straight groove segment 5121 into the curved groove segment 5122; the stop structure at the tail end of the curved groove segment 5122 is a stepped structure formed by the bottom of the groove being higher than the tail end of the straight groove segment 5121, so that the protrusion 530 is prevented from retreating after moving from the tail end of the curved groove segment 5122 into the tail end of the straight groove segment 5121; wherein the groove bottoms of the curved groove segment 5122 and the straight groove segment 5121 are smooth surfaces.

[0161] When the protrusion 530 slides into the curved groove section 5122 along the extension direction of the straight groove section 5121, the first position-limiting step 5121a with a groove bottom higher than the groove bottom of the curved groove section 5122 is provided at the head end of the straight groove section 5121. This step structure prevents the protrusion 530 from returning from the head end of the curved groove section 5122 to the head end of the straight groove section 5121. When the protrusion 530 slides into the straight groove section 5121 along the extension direction of the curved groove section 5122, the second position-limiting step 5122a with a groove bottom higher than the groove bottom of the curved groove section 5121 is provided at the tail end of the straight groove section 5121. This step structure prevents the protrusion 530 from returning from the tail end of the straight groove section 5121 to the tail end of the curved groove section 5122. It should be noted that, in this embodiment, except for the step structure, the groove bottoms of other parts of the straight groove section 5121 and the curved groove section 5122 are configured to be smooth surfaces.

[0162] As shown in Figures 11, 12, 13, 20 and 21, the raised portion 530 includes a support seat 531, a second driving member 532 and a movable member 533. The support seat 531 is constructed with a accommodating cavity with an open end, and the support seat 531 is fixedly connected to the movable member 520; the second driving member 532 is arranged in the accommodating cavity, and one end abuts against the support seat 531; the movable member 533 is movably arranged in the accommodating cavity and abuts against the other end of the second driving member 532, and a portion of the movable member 533 protrudes from the end surface of the support seat 531.

[0163] The support seat 531 is used to be connected to the movable member 520 and is also used to support the second driving member 532 and the movable member 533. In this embodiment, the movable member 533 is a ball and the second driving member 532 is a spring. One end of the accommodating cavity of the support seat 531 is provided with a through hole with a diameter smaller than the diameter of the ball. The ball is arranged in the accommodating cavity and partially exposed from the end face of the support seat 531 through the through hole. One end of the second driving member 532 abuts against the ball and the other end abuts against the cover plate of the support seat 531. When the protrusion 530 slides along the driving chute 512 driven by the movable member 520, the ball rolls in the driving chute 512.

[0164] A stepped structure is provided at both the leading end of the straight groove section 5121 and the trailing end of the curved groove section 5122. This allows the protrusion 530 to smoothly pass through groove bottoms of varying depths while being reliably stopped at the stepped structure and prevented from retraction as it slides along the drive chute 512. In this embodiment, the second driving member 532 is provided so that when the protrusion 530 passes through the stepped structure, the extension and contraction of the second driving member 532 allows the ball bearing to smoothly pass over the stepped structure. Furthermore, the second driving member 532 always tends to cause the ball bearing to move outward along the axis of the support seat 531. This prevents the ball bearing from retracting due to the driving force of the second driving member 532 and the blocking action of the stepped structure when passing over the stepped structure. Of course, in some embodiments, the stepped structure is configured as a ramp to facilitate the protrusion 530's passage over the stepped structure while also providing a better barrier against the protrusion 530.

[0165] In another embodiment, the height of the bottom of the straight groove segment 5121 can be set to gradually increase from the tail end of the straight groove segment 5121 to the head end of the straight groove segment 5121, and the bottom of the head end of the curved groove segment 5122 is lower than the bottom of the head end of the straight groove segment 5121; and the height of the bottom of the curved groove segment 5122 can be set to gradually increase from the head end of the curved groove segment 5122 to the tail end of the curved groove segment 5122, and the bottom of the tail end of the curved groove segment 5122 is higher than the bottom of the tail end of the straight groove segment 5121.

[0166] Such arrangement allows a stop step to be formed at the head end of the straight groove section 5121 and the tail end of the curved groove section 5122 by the height difference of the groove bottom to stop the protrusion 530 and prevent the protrusion 530 from retreating.

[0167] It will be appreciated that in this embodiment, since both the straight groove section 5121 and the curved groove section 5122 are configured in a sloped manner, their groove bottoms are smoothly arranged, and the friction between the groove bottoms and the movable member 533 is relatively low, the movable member 533 is configured as a columnar structure. The effective stop of the protrusion 530 when the straight groove section 5121 of the rotating bracket 510 enters the curved groove section 5122 is primarily due to the step formed by the height difference between the groove bottoms of the head end of the straight groove section 5121 and the head end bracket of the curved groove section 5122. The columnar movable member 533 achieves expansion and contraction through the compression and elastic force of the second driving member 532, achieving a large expansion and contraction range, effectively meeting the movement and stop requirements of the protrusion 530 within the straight groove section 5121 and the curved groove section 5122.

[0168] Further, on the circumferential side surface of one end of mobile member 520 near rotating bracket 510, accommodating groove 521 is set, and the mounting hole that protrusion 530 passes is set at the groove bottom of accommodating groove 521.One end of protrusion 530 is arranged in the accommodating groove 521, and the other end exposes and extends in the driving chute 512 on the rotating bracket 510 from the mounting hole.The end of the part that is positioned in the accommodating groove 521 among the protrusion 530 is the highest and is flush with the circumferential side surface of mobile member 520.So arrange, when fixing protrusion 530, guarantee that protrusion 530 does not protrude from the circumferential side surface of mobile member 520, thereby make in the process that mobile member 520 moves relative to housing 200, even if protrusion 530 is along with the variation of the depth of the groove bottom in the telescopic process, protrusion 530 has certain telescopic space, is unlikely to interfere with housing 200 and causes the situation that friction is too large, is difficult to move to occur.

[0169] As shown in Figures 22 to 26, in one embodiment, the stop structure at the head end of the straight slot segment 5121 is a biasing member, which is at least partially disposed within the straight slot segment 5121. When the protrusion 530 moves along the second direction past the biasing member, the biasing member is biased to avoid the protrusion 530. When the protrusion 530 moves into the curved slot segment 5122, the biasing member resets, thereby preventing the protrusion 530 from retreating. The first direction is opposite to the second direction. By providing the biasing member at the head end of the straight slot segment 5121, the deformation of the biasing member allows the protrusion 530 to smoothly enter the curved slot segment 5122 from the head end of the straight slot segment 5121. The rebound of the biasing member blocks the protrusion 530, thereby preventing the protrusion 530 from retreating.

[0170] As shown in Figure 22, specifically, in some embodiments, the biasing member is a snap arm 513 arranged at the head end of the straight slot segment 5121, the snap arm 513 is arranged on the slot side wall of the straight slot segment 5121, and the end of the snap arm 513 is biased toward the straight slot segment 5121. A groove is provided on the peripheral side surface of the rotating bracket 510 at a position adjacent to the snap arm 513, which makes the snap arm 513 have a certain elastic deformation ability. When the protrusion 530 passes through the latch arm 513, the latch arm 513 can move toward the groove under the force of the protrusion 530, thereby opening the straight groove section 5121 where the latch arm 513 is located, allowing the protrusion 530 to pass through and enter the curved groove section 5122. When the protrusion 530 enters the curved groove section 5122, the latch arm 513 rebounds and closes the head end of the straight groove section 5121. At this time, the latch arm 513 blocks the protrusion 530 to prevent it from retreating. This type of driving groove 512 is stopped by the latch arm 513 in a snap-fit ​​manner, rather than the bottom interference method described above. Therefore, the straight groove section 5121 in the rotating bracket 510 can be set to a flat groove bottom.

[0171] In this type of stop structure, the specific structure of the protrusion 530 is not limited and does not need to have telescopic properties or a large telescopic range. This type of stop structure primarily relies on the deformation of the latch arm 513 in the open-door mode to yield to the protrusion 530. The latch arm 513 rebounds in the closed-door mode, laterally enclosing the linear return path of the protrusion 530. This eliminates the need for the protrusion 530 to significantly extend or retract. Therefore, in this embodiment, the protrusion 530 utilizes a ball-bearing micro-telescopic design to reduce friction. Alternatively, in other embodiments, the protrusion 530 may not have a telescopic function; it only requires that the protrusion not abut the groove bottom, but remain a certain distance away from the groove bottom, generating no frictional resistance.

[0172] As shown in Figures 23 to 26, in some other embodiments, the biasing member is a first spring piece 550, which is arranged in the straight groove segment 5121. The first spring piece 550 includes a connecting portion 551, a transition portion 552 and a stop portion 553 arranged in sequence. The connecting portion 551 is fixedly connected to the rotating bracket 510, and the transition portion 552 is inclined. The end of the transition portion 552 close to the stop portion 553 is away from the bottom of the straight groove segment 5121, so that the stop portion 553 is tilted in the direction away from the bottom of the straight groove segment 5121; wherein, the transition portion 552 and the stop portion 553 can move toward the bottom of the straight groove segment 5121 under the pressure of the guide assembly, so that the guide assembly moves toward the curved groove segment 5122.

[0173] Specifically, the first elastic piece 550 can be fixed to the bottom of the straight slot section 5121 by hot melting or dispensing glue. By configuring the first elastic piece 550 into the form of a connecting portion 551, a transition portion 552, and a stop portion 553, when the protrusion 530 slides in the straight slot section 5121, the first elastic piece 550 is smoothly compressed, thereby allowing the protrusion 530 to smoothly enter the curved slot section 5122 from the straight slot section 5121; when the protrusion 530 falls into the curved slot section 5122, the stop portion 553 of the first elastic piece 550 rebounds, effectively stopping the side of the protrusion 530, thereby preventing the protrusion 530 from retreating along the straight slot section 5121. In this embodiment, the protrusion may not have a telescopic property.

[0174] As shown in Figures 23 to 26, further, a barb structure is provided at the connecting portion 551 of the first spring piece 550, which can be supported on the bottom of the straight groove section 5121 to prevent the first spring piece 550 from collapsing. At the same time, the barb structure is provided in the straight groove section 5121 to prevent the first spring piece 550 from turning outward, ensuring the effective height of the first spring piece 550, thereby ensuring the reliability of the first spring piece 550 in stopping.

[0175] As shown in Figures 26 and 27, in one embodiment, a travel avoidance groove 523 is provided on the movable member 520, and the first stop block 721 is provided in the travel avoidance groove 523, so that after the driving rod 720 moves the second preset stroke under the drive of the loading trigger 710, the first stop block 721 forms abutment with the movable member 520, thereby driving the movable member 520 to move.

[0176] During the loading process, the second stopper 722 of the driving rod 720 first pushes the inner needle tube seat 400 and the outer needle tube seat 300 to move along the axis of the housing 200 toward the proximal end of the housing 200 by a second preset stroke, that is, after the stroke avoids the groove length of the groove 523, the first stopper 721 of the driving rod 720 abuts against the movable member 520. When the trigger is pulled to pull the driving rod 720 to continue moving along the axis of the housing 200 toward the proximal end of the housing 200, the driving rod 720 simultaneously pushes the movable member 520 and the inner and outer needle tube seats to move along the axis of the housing 200 toward the proximal end of the housing 200. After the driving rod 720 pushes the movable member 520 and the inner and outer needle tube seats to move the first preset stroke, the first buckle 522 on the movable member 520 engages with the housing 200; the second buckle 310 on the outer needle tube seat 300 also engages with the housing 200, and the loading is completed.

[0177] As shown in FIG28 , the inner needle tube seat 400 is further movably connected to the outer needle tube seat 300. A second latch 310 is provided on the outer needle tube seat 300 and / or the inner needle tube seat 400. After the outer needle tube seat 300 and / or the inner needle tube seat 400 move a third preset stroke from the firing position toward the proximal end of the housing 200, the second latch 310 engages with the housing 200, completing the chambering. It will be appreciated that the sum of the first preset stroke and the second preset stroke is at least equal to the third preset stroke.

[0178] As shown in FIG29 , in one embodiment, a slot 320 is provided on the circumferential side surface of the outer needle tube seat 300 and / or the inner needle tube seat 400, and a snap-fit ​​protrusion 210 is provided on the inner wall of the housing 200. When the second snap 310 is snapped into engagement with the housing 200, the snap-fit ​​protrusion 210 is snapped into the slot 320. When the second snap 310 is snapped into engagement with the housing 200, the snap-fit ​​protrusion 210 is snapped into the slot 320 on the housing 200, thereby locking the rotation of the rotary transmission mechanism 500. This ensures that after the biopsy needle is loaded but before firing, the rotary transmission mechanism 500 cannot be driven, thereby preventing the inner needle tube seat 400 and the outer needle tube seat 300 from rotating.

[0179] Specifically, the latching groove 320 extends along the axial direction of the housing 200, and the engaging protrusion 210 also extends along the axial direction of the housing 200. Thus, after the biopsy needle is fired, as the inner needle tube seat 400 and the outer needle tube seat 300 move along the axis of the housing 200 toward the distal end of the housing 200, the engaging protrusion 210 can separate from the latching groove 320, thereby enabling the rotating bracket 510 to rotate relative to the housing 200 after the rotation transmission mechanism 500 is unlocked.

[0180] As shown in Figure 27, in one of them embodiment, the quantity of drive rod 720 is two, and two drive rods 720 are relatively set along the radial direction of moving member 520, and the second blocks 722 on the two drive rods 720 are plugged in mutually.By two relative drive rods 720 are set in the radial direction of moving member 520, to apply thrust to moving member 520 by the first block 721 on the two drive rods 720, apply thrust to outer needle tube seat 300 by two second blocks 722, thereby make in the chambering process, moving member 520, interior needle tube seat 400 and outer needle tube seat 300 can not rock.Particularly, second block 722 is provided with circular arc, and the relative ends of two second blocks 722 are provided with projection and groove that are plugged in mutually, and two second blocks 722 are plugged in by the form of concave-convex matching.To improve both stability by the plugging of two second blocks 722, thereby improve the stability of drive rod 720 motions.

[0181] As shown in Figure 31, in one embodiment, the biopsy needle also includes a needle core 110 and a needle core seat 920, the needle core seat 920 is fixedly connected to the proximal end of the shell 200, the needle core 110 is fixedly connected to the needle core seat 920, and the needle core seat 920 is provided with a first guide portion at one end facing the distal end of the shell 200; the inner needle tube seat 400 or the outer needle tube seat 300 is provided with a second guide portion at one end facing the proximal end of the shell 200, and when the second buckle 310 is engaged with the shell 200, the first guide portion is matched with the second guide portion.

[0182] The first guide portion and the second guide portion are connected in coordination, so that the inner needle tube seat 400 and the outer needle tube seat 300 are more stable when the needle is loaded. When the inner needle tube seat 400 and the outer needle tube seat 300 are always connected to the key during the loading and firing process, the first guide portion and the second guide portion are connected in coordination, which reduces the structural strength requirements of the key 511 on the rotating bracket 510 and can play a certain guiding role. Thereby, the stability of the operation of the rotating transmission mechanism 500 is improved. Specifically, a guide channel 410 is provided at the proximal end of the outer needle tube seat 300 or the inner needle tube seat 400, and the guide channel 410 is the second guide portion. A guide boss 921 is provided at the distal end of the needle core seat 920 toward the housing 200, and the guide boss 921 is the first guide portion. During the movement of the outer needle tube seat 300 and the inner needle tube seat 400 toward the proximal end of the shell 200, the guide boss 921 can be inserted into the guide channel 410, and at this time the key 511 is located in the slot formed by the inner needle tube seat 400 and / or the outer needle tube seat 300. The guidance of the key 511 and the coordinated connection of the first guide portion and the second guide portion can prevent the inner and outer needle tube seats from moving crookedly.

[0183] In one embodiment, the biopsy needle further includes a shift mechanism 800, which includes a first shift member 820, a second shift member, and a gear shift button 810. The first shift member 820 is slidably connected to the insertion key 511 and is used to limit the movement position of the inner needle tube seat 400 and the outer needle tube seat 300. The second shift member is movably disposed within the housing 200 and rotationally connected to the first shift member 820. Movement of the second shift member can control the position of the first shift member 820 relative to the insertion key 511. The gear shift button 810 is disposed on the housing 200 and connected to the second shift member. The gear shift button 810 is operably movable relative to the housing 200, thereby controlling the position of the first shift member via the second shift member. The second shift member controls the position of the first shift member relative to the insertion key to achieve the travel of the outer needle tube seat 300 and the inner needle tube seat 400 after firing, thereby controlling the sampling distance.

[0184] Specifically, the first shift member is provided with two stop surfaces, a boss and a large end surface, the boss is used to stop the inner needle tube seat 400, and the large end surface is used to stop the outer needle tube seat 300. In addition, a small spring is provided between the inner and outer needle tube seats to maintain the displacement distance between the inner and outer needle tube seats. When the inner and outer needle tube seats are in the movement process of firing sampling, the third driving member 910 pushes the inner needle tube seat 400, and pushes the outer needle tube seat 300 from the proximal end to the distal end of the shell 200 through the inner needle tube seat 400. Since the elastic force of the third driving member 910 is much higher than the elastic force of the small spring between the inner and outer needle tube seats, the outer needle tube seat 300 and the inner needle tube seat 400 remain relatively stationary during the movement process of the inner and outer needle tube seats being fired, that is, the second elastic piece 131 of the outer needle tube 130 is kept not inserted into the slot of the inner needle tube 120; when the inner needle tube seat 400 is stopped by the boss stop, the outer needle tube seat 300 continues to move forward under the inertia of the small spring and the outer needle tube seat 300 until the outer needle tube seat 300 is stopped by the large end surface stop. During this process, the inner and outer needle tube seats move relative to each other, so that the second elastic piece 131 of the outer needle tube 130 is inserted into the slot of the inner needle tube 120.

[0185] It should be noted that in some embodiments, a latch is provided at the distal end of the inner needle tube seat 400, which abuts the distal end of the outer needle tube seat 300. This allows the inner needle tube seat 400 to move simultaneously with the outer needle tube seat 300 when the third drive member 910 pushes the outer needle tube seat 300 to move. During this process, the cutting edge at the distal end of the inner needle tube 120 penetrates the tissue, allowing the target tissue to enter the inner needle tube 120, and the outer needle tube 130 moves simultaneously with the inner needle tube. When the inner needle tube seat 400 moves to abut against the boss and stops, the latch on the inner needle tube seat can be simultaneously unlocked, and the outer needle tube seat 300 disengages from the latch on the inner needle tube seat 400 and continues to move a certain distance toward the distal end of the housing under the elastic force of the third drive member 910. At this time, the second spring piece 131 on the outer needle tube 130 enters the inner needle tube 120 through the slot 3521 on the inner needle tube 120, passes through the sample tissue in the inner needle tube, and achieves the purpose of radially cutting the sample tissue. This process is the firing process of the biopsy needle.

[0186] It will be appreciated that in the technical solution in which the elastic blade is disposed on the inner needle tube 120 and two spaced-apart slots are provided on the outer needle tube 130, a buckle is provided at the distal end of the outer needle tube seat 300, which abuts the distal end of the inner needle tube seat 400, and the third driving member 910 abuts the proximal end of the inner needle tube seat 400. When the third driving member 910 pushes the inner needle tube seat 400 to move, the outer needle tube seat 300 can move simultaneously with the inner needle tube seat 400. During this process, the cutting edge at the distal end of the inner needle tube 120 penetrates the tissue, forcing the target tissue into the inner needle tube 120, and the outer needle tube 130 moves simultaneously with the inner needle tube 120. When the outer needle tube seat 300 moves to abut against the boss and stops, the buckle on the outer needle tube seat is unlocked, and the inner needle tube seat 400 disengages from 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 third driving member 910. During this process, the inner needle tube 120, driven by the inner needle tube seat 400, moves relative to the outer needle tube 130. At this time, the elastic blade on the inner needle tube 120 enters the outer needle tube 130 through the slot near the distal end of the outer needle tube 130, penetrates the sample tissue between the inner needle tube 120 and the outer needle tube 130, and achieves the purpose of radially cutting the sample tissue.

[0187] In some other embodiments, no small spring may be provided between the inner and outer needle tube seats, and the outer needle tube seat 300 moves relative to the inner needle tube seat 400 entirely by the inertia of the outer needle tube seat 300 during the firing process.

[0188] It should be noted that the biopsy needle further includes a third driving member 910, which is disposed within the housing 200 and sleeved onto the needle core 110. One end of the third driving member 910 abuts against the housing 200, and the other end abuts against the outer needle tube seat 300 and / or the inner needle tube seat 400. When the second buckle 310 is disengaged from the housing 200, the inner needle tube seat 400 and the outer needle tube seat 300 move toward the distal end of the housing 200 under the elastic force of the third driving member 910. In some examples, the third driving member 910 may be a firing spring.

[0189] The working principle of the biopsy needle provided in the above embodiment is as follows (refer to Figures 1 to 31 for understanding):

[0190] Before inserting the biopsy needle into the human body, it must be loaded. Before loading, the second spring 131 of the outer needle tube 130 remains inserted into the inner needle tube 120, and the third driving member 910 is in a relaxed state. Pulling the loading trigger 710 causes it to rotate relative to the housing 200. During this rotation, the loading trigger 710 pulls the driving rod 720 along the axis of the housing 200 toward the proximal end of the housing 200. In the initial stage, after the second stopper 722 of the drive rod 720 pushes the inner needle tube seat 400 and the outer needle tube seat 300 along the axis of the housing 200 by a second predetermined distance, the first stopper 721 of the drive rod 720 abuts the movable member 520. After the drive rod 720 continues to move the first predetermined distance toward the proximal end of the housing 200, the first latch 522 on the movable member 520 engages with the housing 200, and the second latch 310 on the outer needle tube seat 300 engages with the housing 200. During the loading process, the first drive member 540 between the movable member 520 and the rotating bracket 510 is compressed and in a ready state. Similarly, the third drive member 910 between the outer needle tube seat 300 and the housing 200 is compressed and in a ready state. In this way, the biopsy needle is loaded.

[0191] After loading, the needle core 110 is in a protruding state, and the second spring piece 131 of the outer needle tube 130 is released from the arc groove of the inner needle tube 120. Next, the gear operation can be carried out by toggling the gear switch button to adjust the desired gear. Then, guided by the imaging device, the biopsy needle is inserted into the human body and moved near the target tissue. After toggling the second unlocking member, the sampling action is carried out. It should be noted that in the technical solution of this application, the second unlocking member, like the first unlocking member, can be unlocked from both the distal end and the proximal end of the housing, that is, including the front firing button and the rear firing button.

[0192] Specifically, the doctor can press the tail firing button at the tail, and the boss structure in this button will push the second clip 310 on the outer tube seat, so that the second clip 310 is disengaged from the shell 200. At this time, the third driving member 910 in compression will release energy, and the potential energy accumulated in the early compression will be converted into kinetic energy, pushing the outer needle tube seat 300 and the inner needle tube seat 400 along the axis of the shell 200 toward the far end of the shell 200. Since the inner and outer needle tube seats can move relative to each other, when the inner needle tube seat 400 abuts against the first shift member, the boss on the first shift member will first stop the inner needle tube seat 400, and then the large end face of the first shift member will stop the outer needle tube seat to ensure that the spring clip on the outer needle tube 130 extends into the arc groove of the inner needle tube 120. Specifically, the inner and outer needle tube seats will reach the first shift piece at the same speed at the same time, until the movement of the inner needle tube seat 400 collides with the boss of the first shift piece, completing the initial cutting of the target tissue by the inner needle tube seat 400 driving the inner needle tube 120; at this time, the outer needle tube seat 300 continues to move forward for a distance under the action of inertia until it hits the stop surface of the first shift piece and stops, completing the outer needle tube seat 300 driving the second spring piece 131 of the outer needle tube 130 to enter the slot of the inner needle tube 120 to cut off the target tissue in the inner needle tube 120.

[0193] Of course, when firing, the doctor can also operate the front firing button, which will be linked to the rear firing button to fire the inner and outer needle holders. The specific firing process is the same as the above-mentioned movement process.

[0194] After the biopsy needle is fired, the first unlocking member 600 is pressed to unlock the rotary transmission mechanism 500, disengaging the first latch 522 from the housing 200. The movable member 520, under the elastic force of the first driving member 540, moves toward the distal end of the housing 200. The protrusion 530 moves along the curved groove section 5122 of the driving slot 512, thereby driving the rotating bracket 510 to rotate relative to the housing 200. Because the insert is always connected to the inner and outer needle tube holders, the inner and outer needle tube holders rotate relative to the housing 200 under the drive of the rotating bracket 510, thereby driving the inner and outer needle tubes 130 to rotate relative to the needle core 110. During the rotation of the inner needle tube holder 400, the second elastic leaf 131 on the outer needle tube 130, which extends into the inner needle tube 120, also rotates. This second elastic leaf 131 circumscribes the sample tissue within the inner needle tube 120, thereby separating the sample tissue from surrounding tissue.

[0195] For biopsy needle sampling, the process is to first temporarily store the target tissue in the chamber formed by the inner needle tube and the needle core of the biopsy needle, then insert the cutting blade on the outer needle tube into the inner needle tube and further cut off the temporarily stored target tissue, thereby obtaining a target tissue sample that is completely separated from the human tissue, and then pull out the needle body.

[0196] During the sampling process, the cutting blade inserted into the inner needle tube for supplementary cutting cannot completely cut off the target tissue. Due to the involvement of the tissue, the target tissue sample is pulled and damaged during the process of being removed. The target tissue sample may even fall out of the needle tube due to the pulling, resulting in sampling failure.

[0197] Please refer to FIG32 , which is a partial structural diagram of the biopsy needle.

[0198] Another embodiment of the present application provides a biopsy needle, including a housing 200 , an inner needle tube 120 , an outer needle tube 130 , and a rotation transmission mechanism.

[0199] The rotation transmission mechanism is disposed in the housing 200 and includes a driving assembly 251 and a transmission assembly in transmission connection with the driving assembly 251 .

[0200] Please refer to Figures 33 and 34 together. Figure 33 is a schematic diagram of the internal structure of the biopsy needle (without completing the sampling and firing), and Figure 34 is a schematic diagram of the internal structure of the biopsy needle (after completing the sampling and firing).

[0201] After the inner needle tube seat 400 and the outer needle tube seat 300 are fired to complete sampling, for example, the inner needle tube seat 400 and the outer needle tube seat 300 respectively move the preset stroke along the axial direction of the inner needle tube 120 to complete the sampling firing, and then operate the driving component to operably drive the rotary transmission mechanism multiple times, thereby realizing multiple synchronous rotations of the inner needle tube seat 400 and the outer needle tube seat 300.

[0202] Among them, after the inner needle tube seat 400 and the outer needle tube seat 300 are fired to complete sampling, the inner needle tube seat 400 and the outer needle tube seat 300 are both connected to the transmission assembly, and the second spring piece 131 of the outer needle tube 130 is inserted into the slot of the inner needle tube 120. By operably driving the rotary transmission mechanism multiple times, the inner needle tube seat 400 and the outer needle tube seat 300 can be rotated synchronously multiple times, so that the second spring piece 131 rotates around the axis of the inner needle tube 120 to perform a second cutting on the sampled tissue, thereby being able to perform a more thorough cutting of the target tissue to obtain a target tissue sample that is completely separated from the human tissue.

[0203] Understandably, considering that if both the inner needle tube seat 400 and the outer needle tube seat 300 are connected to the transmission assembly during the firing process, it is necessary to align and connect the moving inner needle tube seat 400 and the outer needle tube seat 300 with the transmission assembly, which is relatively difficult to operate and places high demands on the design. Therefore, in order to reduce the design accuracy, before the inner needle tube seat 400 and the outer needle tube seat 300 are fired to complete the sampling, the inner needle tube seat 400 and the outer needle tube seat 300 can also be connected to the transmission assembly, that is, before and after the inner needle tube seat 400 and the outer needle tube seat 300 are fired to complete the sampling, the inner needle tube seat 400 and the outer needle tube seat 300 are always connected to the transmission assembly.

[0204] Among them, during the biopsy needle firing sampling process, first, the inner needle tube seat 400 and the outer needle tube seat 300 move synchronously along the axial direction of the inner needle tube 120 for the first stroke. During this process, the inner needle tube 120 realizes the first step of cutting the target tissue, allowing the target tissue to enter the inner needle tube 120. Then, the inner needle tube 120 stops and the outer needle tube 130 continues to move along the axial direction of the inner needle tube 120 for the second stroke. During this process, the second spring piece 131 extends into the slot to realize the cutting of the target tissue in the inner needle tube 120. In this application, the sampling firing is preliminarily completed at this time.

[0205] For example, after the rotary transmission mechanism is driven for the first time to achieve the first synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300, the rotary transmission mechanism may be driven for a second time to achieve the second synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300. After the rotary transmission mechanism is driven for the Kth time to achieve the Kth synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300, the rotary transmission mechanism may be driven for the (K+1)th time to achieve the (K+1)th synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300, where K is a positive integer greater than or equal to 1.

[0206] The biopsy needle provided in the embodiment of the present application has a rotary transmission mechanism including a drive assembly 251 and a transmission assembly that is transmission-connected to the drive assembly 251, and after the inner needle tube seat 400 and the outer needle tube seat 300 are fired to complete sampling, the inner needle tube seat 400 and the outer needle tube seat 300 are both connected to the transmission assembly. By operably driving the rotary transmission mechanism multiple times, multiple synchronous rotations of the inner needle tube seat 400 and the outer needle tube seat 300 can be achieved. Therefore, the biopsy needle can be rotated more conveniently by driving the rotary transmission mechanism to perform a more thorough cutting of the target tissue. In the present application, the sampling firing is completed at this time to obtain a target tissue sample that is completely separated from the human tissue, which can improve the problem of pulling damage to the tissue during the removal of the target tissue sample due to tissue entanglement during the sampling process, and even the target tissue sample may fall out of the needle tube under pulling, resulting in sampling failure.

[0207] The biopsy needle provided in the embodiment of the present application solves the problem of incomplete puncture and cutting of samples by traditional tubular needles by integrating a flexible and convenient rotary transmission mechanism, thereby achieving more reliable sampling, strengthening the cutting effect between the second spring piece 131 of the outer needle tube 130 and the tissue to be cut, facilitating successful sampling, and can be repeatedly rotated as needed.

[0208] In one embodiment, the driving assembly 251 is movably or rotatably disposed on the housing 200 , and the transmission assembly includes a gear set 252 . The driving assembly 251 is in transmission connection with the rotating bracket 510 via the gear set 252 to drive the rotating bracket 510 to rotate.

[0209] Under the action of the driving assembly 251 driving the gear set 252, the gear set 252 can drive the rotating bracket 510 to rotate. The rotating bracket 510 can rotate relative to the housing 200 to drive the outer needle tube seat 300 and the inner needle tube seat 400 to rotate relative to the housing 200.

[0210] Optionally, the transmission assembly includes a gear set 252. The gear set 252 is in transmission connection with the drive assembly 251. The rotating bracket includes a transition piece 253 and a transmission piece 254. The transition piece 253 can rotate around the axis of the inner needle tube 120, and the inner needle tube seat 400 and the outer needle tube seat 300 are both slidably connected to the transition piece 253 along the axial direction of the inner needle tube 120; the transmission piece 254 is arranged between the gear set 252 and the transition piece 253, and the opposite ends of the transmission piece 254 are respectively in transmission connection with the gear set 252 and the transition piece 253.

[0211] The driving assembly 251 can sequentially drive the transition piece 253 to rotate through the gear set 252 and the transmission piece 254 , thereby achieving synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300 around the axial direction of the inner needle tube 120 .

[0212] By adopting the above solution, the structure of the transmission assembly can be made more compact, thereby reducing the volume of the biopsy needle.

[0213] It should be noted that the transition piece 253 is provided with a boss 2531 and a stop surface 2533. After the third driving member 910 pushes the outer needle tube seat 300 and the inner needle tube seat 400 to impact the transition piece 253, the outer needle tube seat 300 and the inner needle tube seat 400 will reach the transition piece 253 at the same speed at the same time until the inner needle tube seat 400 collides with the boss 2531 of the transition piece 253, and the movement is terminated. The inner needle tube seat 400 and the outer needle tube seat 300 are along the axis of the inner needle tube 120. The outer needle tube seat 300 moves synchronously in the first stroke in the direction to complete the initial cutting of the target tissue by the inner needle tube seat 400 and the inner needle tube 120. The outer needle tube seat 300 continues to move forward for a distance under the action of inertia, and the outer needle tube 130 continues to move along the axial direction of the inner needle tube 120 for the second stroke until it hits the stop surface 2533 of the transition piece 253 and stops. The outer needle tube seat 300 drives the second spring piece 131 of the outer needle tube 130 to enter the slot of the inner needle tube 120 to complete the cutting of the target tissue.

[0214] In one embodiment, the driving assembly 251 includes a pressing assembly 2511 and a sector gear 2512. The pressing assembly 2511 is connected to the sector gear 2512, and operating the pressing assembly 2511 can drive the sector gear 2512 to rotate. The gear set 252 includes a first transmission gear 2521 and a second transmission gear 2522, which are transmission-connected to the sector gear 2512. One end of the transmission member 254 includes a third transmission gear 2541, which is transmission-connected to the third transmission gear 2541. This arrangement is labor-saving, reliable, and easy to operate. By driving the sector gear 2512 to rotate through the pressing assembly 2511, the transition member 253 can be driven to rotate in turn through the gear set 252 and the transmission member 254, thereby achieving synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300 around the axis of the inner needle tube 120. The structure is simple and easy to manufacture.

[0215] For example, the first transmission gear 2521 may be a cylindrical gear, the second transmission gear 2522 may be a bevel gear coaxially arranged with the cylindrical gear, and the third transmission gear 2541 may be a bevel gear.

[0216] Optionally, the driving assembly 251 includes a rotating shaft 2513 connected to the housing 200, and the sector gear 2512 is rotatably connected to the rotating shaft 2513. This arrangement facilitates the rotatable arrangement of the sector gear 2512 outside the housing 200.

[0217] In order to automatically reset the pressing assembly 2511 and the sector gear 2512 after the pressing assembly 2511 is operated to drive the sector gear 2512 to rotate, the pressing assembly 2511 optionally includes a pressing member 5111 and an elastic member 5112 connected to each other, the elastic member 5112 being connected to the sector gear 2512, and the elastic member 5112 being used to accumulate elastic potential energy when the pressing member 5111 is pressed, so as to drive the pressing member 5111 to reset when the pressing member 5111 is released. In some examples, one end of the elastic member 5112 is connected to the sector gear 2512 and the other end is connected to the housing 200. With this arrangement, the pressing assembly 2511 and the sector gear 2512 can automatically reset after the pressing assembly 2511 is operated to drive the sector gear 2512 to rotate.

[0218] For example, please refer to Figure 33. When the pressing member 5111 is pressed, the pressing member 5111 drives the sector gear 2512 to rotate around the rotating axis 2513 in the direction indicated by the arrow N. At this time, the elastic member 5112 accumulates elastic potential energy, and the inner needle tube 120 and the outer needle tube 130 both rotate synchronously in the first direction; when the pressing member 5111 is released, the elastic member 5112 drives the pressing member 5111 to reset, and the pressing member 5111 drives the sector gear 2512 to rotate around the rotating axis 2513 in the direction indicated by the arrow M, and the inner needle tube 120 and the outer needle tube 130 both rotate synchronously in the second direction. The direction indicated by the arrow N and the direction indicated by the arrow M are opposite directions, and the second direction is opposite to the first direction. When the pressing member 5111 is released, the elastic member 5112 drives the pressing member 5111 to return to its original position. The pressing member 5111 can be pressed again to drive the sector gear 2512 to rotate about the rotation axis 2513 in the direction indicated by the arrow N. By repeating the above process, the inner needle tube seat 400 and the outer needle tube seat 300 can be rotated synchronously multiple times, that is, the inner needle tube 120 and the outer needle tube 130 can be cyclically rotated between the first direction and the second direction.

[0219] It should be noted that when the pressing member 5111 is released, the elastic member 5112 drives the pressing member 5111 to reset, and the pressing member 5111 drives the sector gear 2512 to rotate around the rotating axis 2513 in the direction indicated by the arrow M. The sector gear 2512 is not engaged with the first transmission gear 2521 and is an idle stroke. When the pressing member 5111 is pressed, the pressing member 5111 drives the sector gear 2512 to rotate around the rotating axis 2513 in the direction indicated by the arrow N, and the sector gear 2512 is engaged with the first transmission gear 2521 to achieve multiple synchronous rotations of the inner needle tube 120 and the outer needle tube 130 in the first direction.

[0220] The elastic member 5112 may be a spring, a torsion spring, or elastic rubber, etc. The two ends of the elastic member 5112 are connected to the housing 200 and the pressing member 5111 respectively.

[0221] Optionally, to facilitate the operator's operation of the pressing assembly 2511, a rotation transmission mechanism is provided at the distal end of the housing 200. The housing 200 is provided with an opening 201, and at least a portion of the pressing assembly 511 extends through the opening 201 to the exterior of the housing 200. In this arrangement, the operator can drive the sector gear 2512 to rotate by pressing at least the portion of the pressing assembly 2511 extending through the opening 201 to the exterior of the housing 200.

[0222] Please refer to Figures 32 to 34. In some embodiments, the biopsy needle includes an adjusting member 260, which is movably connected to the shell 200. The adjusting member 260 has a button 261 located outside the shell 200. The adjusting member 260 is rotatably connected to the transition member 253 for adjusting the position of the transition member 253 in the axial direction of the inner needle tube 120.

[0223] By adopting the above solution, the position of the transition piece 253 in the axial direction of the inner needle tube 120 can be adjusted, and thus the length of the inner needle tube 120 and the outer needle tube 130 inserted into the tissue to be cut can be adjusted, that is, the sampling length can be adjusted.

[0224] Optionally, the housing 200 is provided with a limiting hole 202, and a plurality of limiting portions 203 are provided in the limiting hole 202. The plurality of limiting portions 203 are spaced apart along the axis of the inner needle tube 120. The adjusting member 260 includes a mating portion 262, which can be engaged with different limiting portions 203 to adjust the position of the transition member 253 in the axis direction of the inner needle tube 120. This arrangement makes it possible to more conveniently adjust the position of the transition member 253 in the axis direction of the inner needle tube 120.

[0225] The limiting portion 203 may be a slot or a hole, and the matching portion 262 may be a block or a column. Alternatively, the matching portion 262 may be a slot or a hole, and the limiting portion 203 may be a block or a column.

[0226] Optionally, the transition piece 253 is provided with a slide groove 2532, into which one end of the transmission member 254 extends, and the transmission member 254 can reciprocate within the slide groove 2532 along the axis of the inner needle tube 120. At least one inner wall surface of the slide groove 2532 is in slidable contact with the transmission member 254 to restrict the transmission member 254 from rotating relative to the transition piece 253 about the axis of the inner needle tube 120. This arrangement allows the position of the transition piece 253 in the axis direction of the inner needle tube 120 to be adjusted, while preventing the transmission member 254 from rotating relative to the transition piece 253 about the axis of the inner needle tube 120.

[0227] For example, the main body of the transmission member 254 is a rod-shaped structure, the third transmission gear 2541 is connected to one end of the rod-shaped structure, and the rod-shaped mechanism has a prismatic rod body, which is inserted into the slide groove 2532 of the transition member 253, so that the transition member 253 can move relative to the prismatic rod body of the transmission member 254, and the transition member 253 cannot rotate relative to the prismatic rod body.

[0228] The transition piece 253 is provided with two keys, which respectively insert and cooperate with the holes on the inner needle tube seat 400 and the outer needle tube seat 300. The inner needle tube seat 400 and the outer needle tube seat 300 can move relative to each other on the keys of the transition piece 253. In this way, after firing, the pressing assembly 2511 is operated, and its sector gear 2512 drives the first transmission gear 2521 and the second transmission gear 2522 to rotate. The second transmission gear 2522 drives the third transmission gear 2541 to rotate. The transmission member 254 drives the transition piece 253 to rotate. The transition piece 253, in turn, drives the inner needle tube seat 400 and the outer needle tube seat 300 to rotate through its own keys, thereby achieving the function of synchronous rotation of the inner needle tube 120 and the outer needle tube 130.

[0229] It should be noted that when the key is longer along the length direction of the inner needle tube 120, the inner needle tube seat 400 and the outer needle tube seat 300 can move along the key before the inner needle tube seat 400 and the outer needle tube seat 300 are fired to complete sampling.

[0230] Please refer to FIG. 32 . In some embodiments, the rotation transmission mechanism has a preset transmission ratio, and the operation of the driving assembly can at least enable the rotation angle of the rotating bracket in any rotation direction to be not less than 360° through the transmission assembly.

[0231] By adopting the above-mentioned scheme to operate the rotary transmission mechanism once, the rotation angle of the inner needle tube 120 and the outer needle tube 130 in any rotation direction can be not less than 360°, so that the second spring piece 131 of the outer needle tube 130 can cut the tissue to be cut more thoroughly.

[0232] Optionally, the second elastic piece 131 of the outer needle tube 130 is provided with a side cutting edge, and the root of the second elastic piece 131 is reinforced to alleviate the impact on the second elastic piece 131 during the rotation process and reduce the risk of deformation.

[0233] For example, the preset transmission ratio of the rotation transmission mechanism may be:

[0234] The transmission ratio of the sector gear 2512 and the first transmission gear 2521 is 1:8, and the transmission ratio of the second transmission gear 2522 and the third transmission gear 2541 is 1:2, that is, when the sector gear 2512 rotates 1 / 8 of a circle in a single operation, the second transmission gear 2522 rotates 1 / 2 circle, and the third transmission gear 2541 just drives the inner needle tube seat 400 and the outer needle tube seat 300 to rotate 1 full circle, that is, the rotation angle is 360°.

[0235] It can be understood that when the sector gear 2512 rotates more than 1 / 8 of a turn in a single operation, the rotation angle of the inner needle tube seat 400 and the outer needle tube seat 300 in any rotation direction is greater than 360°.

[0236] According to the space conditions, the specific number of teeth is illustrated here as follows: the sector gear 2512 has 40 teeth, and the effective teeth cooperating with the first transmission gear 2521 here are 5 teeth, the first transmission gear 2521 has 10 teeth, the second transmission gear 2522 has 24 teeth, and the third transmission gear 2541 has 12 teeth.

[0237] It can be understood that the rotation transmission mechanism adopts gear transmission, which is labor-saving and reliable to press, easy to operate, and has good precision control over 360° rotation and small angular deviation.

[0238] Before the biopsy needle provided in the above embodiment is loaded, the second spring piece 131 of the outer needle tube 130 remains inserted into the slot of the inner needle tube 120, and the third actuator 910 is in a relaxed state. Before inserting the biopsy needle into the human body, loading is required. Specifically, lever 280 is pulled to compress the third actuator 910. When the buckle on the outer needle hub engages the buckle on the housing 200, the third actuator 910 is compressed into place, completing the loading process.

[0239] After loading, the needle core 110 is in a protruding state, and the second spring piece 131 of the outer needle tube 130 is released from the arc groove of the inner needle tube 120. Next, the gear operation can be performed, and the adjustment member 260 can be turned to adjust the gear for the desired sampling length. The gear operation can also be performed before loading. Then, guided by the imaging device, the biopsy needle provided in the embodiment of the present application is inserted into the human body and moved near the target tissue. After the self-locking key is turned to unlock, the sampling action is carried out.

[0240] The biopsy needle provided in the embodiment of the present application supports two firing modes, the principles of which are as follows:

[0241] The first one is that in some CT (Computed Tomography) surgeries, the operator can puncture the biopsy needle to the sampling position of the target tissue under the guidance of the CT image, and then press the firing button at the tail of the biopsy needle. The boss structure in this firing button will push the buckle on the outer needle tube seat 300 to disengage it from the buckle position in the shell 200. At this time, the compressed third driving member 910 will release energy, converting the potential energy accumulated in the early compression into kinetic energy, pushing the outer needle tube seat 300 and the inner needle tube seat 400 to impact the transition member 253. There are a boss 2531 and a stop surface 2533 on the transition piece 253, and a small spring is provided between the outer needle tube seat 300 and the inner needle tube seat 400 to maintain the staggered distance between the outer needle tube seat 300 and the inner needle tube seat 400. When the outer needle tube seat 300 and the inner needle tube seat 400 are in the movement process of firing sampling, the third driving member 910 pushes the inner needle tube seat 400, and pushes the outer needle tube seat 300 from the proximal end to the distal end of the shell 200 through the inner needle tube seat 400. Since the elastic force of the third driving member 910 is much higher than the elastic force of the small spring, the outer needle tube seat 300 and the inner needle tube seat 400 remain relatively stationary during the movement process of the outer needle tube seat 300 and the inner needle tube seat 400 being fired, and will The same speed reaches the transition piece 253 at the same time, and the movement is stopped until the inner needle tube seat 400 collides with the boss 531 of the transition piece 253. The inner needle tube seat 400 and the outer needle tube seat 300 synchronously move the first stroke along the axial direction of the inner needle tube 120, completing the initial cutting of the target tissue by the inner needle tube seat 400 and the inner needle tube 120; the outer needle tube seat 300 continues to move forward for a distance under the action of inertia, and the outer needle tube 130 continues to move the second stroke along the axial direction of the inner needle tube 120 until it hits the stop surface 2533 of the transition piece 253 and stops. The outer needle tube seat 300 drives the second spring piece 131 of the outer needle tube 130 to enter the slot of the inner needle tube 120, completing the cutting of the target tissue. At this time, the outer needle tube seat 300 maintains a staggered state relative to the inner needle tube 120 under the action of the small spring and its side buckle, that is, the second spring piece 131 of the outer needle tube 130 is kept inserted into the groove of the inner needle tube 120, ensuring the reliability of sampling.

[0242] Then, the Kth operation of the pressing assembly 2511 drives the sector gear 2512 to rotate, which in turn drives the transition piece 253 to rotate through the gear set 252 and the transmission piece 254, thereby achieving the Kth synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300, where K is a positive integer greater than or equal to 1;

[0243] Then, the (K+1)th operation pressing component 2511 drives the sector gear 2512 to rotate, which in turn drives the transition piece 253 to rotate through the gear set 252 and the transmission piece 254, thereby realizing the (K+1)th synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300.

[0244] The pressing assembly 2511 is repeatedly operated to drive the sector gear 2512 to rotate until the target tissue is more thoroughly cut, thereby obtaining a target tissue sample that is completely separated from the human tissue.

[0245] The second method is that, as in some ultrasonic surgeries, the operator can also press the front firing button, which will link the tail firing button to repeat the movement process described in the first procedure to achieve firing sampling of the target tissue.

[0246] Then, the Kth operation of the pressing assembly 2511 drives the sector gear 2512 to rotate, which in turn drives the transition piece 253 to rotate through the gear set 252 and the transmission piece 254, thereby achieving the Kth synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300, where K is a positive integer greater than or equal to 1;

[0247] Then, the (K+1)th operation of the pressing component 2511 drives the sector gear 2512 to rotate, which in turn drives the transition piece 253 to rotate through the gear sets 252 and 254, thereby realizing the (K+1)th synchronous rotation of the inner needle tube seat 400 and the outer needle tube seat 300.

[0248] The pressing assembly 2511 is repeatedly operated to drive the sector gear 2512 to rotate until the target tissue is more thoroughly cut, thereby obtaining a target tissue sample that is completely separated from the human tissue.

[0249] As shown in Figures 35 and 36, in one embodiment, the rotating transmission mechanism 500 includes a transmission assembly 3410 and a rotating bracket 510, and the transmission assembly 3410 is movably connected to the shell 200; the rotating bracket 510 is rotatably connected to the shell 200, and the transmission assembly 3410 is transmission-connected to the rotating bracket 510, and the inner needle tube seat 400 and the outer needle tube seat 300 can both be connected to the rotating bracket 510; wherein, when the transmission assembly 3410 moves relative to the shell 200 along the axis of the shell 200, the transmission assembly 3410 can drive the rotating bracket 510 to rotate relative to the shell 200; the rotating bracket 510 is constructed with an avoidance hole that passes through the rotating bracket 510 along the axial direction of the rotating bracket 510, and the avoidance hole is used for the needle assembly 100 to pass through.

[0250] The transmission assembly 3410 is connected to the rotating bracket 510 in a transmission manner so as to convert the linear movement of the transmission assembly 3410 along the axis of the housing 200 into the rotational movement of the rotating bracket 510 about the axis of the housing 200. Since the rotating bracket 510 is connected to the inner needle tube seat 400 and the outer needle tube seat 300, when the rotating bracket 510 rotates, the inner needle tube seat 400 and the outer needle tube seat 300 can be driven by the rotating bracket 510 to rotate relative to the housing 200, thereby achieving the rotation of the inner needle tube 120 and the outer needle tube 130 relative to the needle core 110. Since the inner needle tube seat 400 and the outer needle tube seat 300 are arranged at the proximal end of the housing 200 and the rotating transmission assembly 3410 is arranged at the distal end of the housing 200, an avoidance hole is provided in the rotating bracket 510 to facilitate the inner needle tube 120 and the outer needle tube 130 to pass through and extend outside the housing 200.

[0251] In another embodiment, the biopsy needle also includes a fixing ring 3700, which is fixedly connected to the shell 200, and a limiting groove extending along the circumferential direction of the fixing ring 3700 is constructed on the inner circumferential surface of the fixing ring 3700; the outer peripheral edge of the rotating bracket 510 is arranged in the limiting groove, and the rotating bracket 510 can rotate relative to the fixing ring 3700 along the circumferential direction of the fixing ring 3700.

[0252] As shown in Figures 35 and 36, in one embodiment, the driving assembly 251 is connected to the housing 200. The driving assembly 251 can be operably moved relative to the housing 200. The driving assembly 251 is connected to the transmission assembly 3410 to drive the transmission assembly 3410 to move relative to the housing 200. By providing the driving assembly 251 and connecting the driving assembly 3430 to the transmission assembly 3410, the driving assembly 251 and the housing 200 are moved relative to each other to drive the transmission assembly 3410 to move relative to the housing 200, thereby causing the transmission assembly 3410 to drive the rotating bracket 510 to rotate relative to the housing 200.

[0253] In one embodiment, the driving assembly 251 includes an elastic assembly 3431; the moving member includes:

[0254] The transmission screw 3411 is threadedly connected to the rotating bracket;

[0255] Two ends of the elastic component 3431 respectively abut against the rotating bracket 510 and the transmission screw 3411 , so that the transmission screw 3411 can move relative to the housing 200 .

[0256] Specifically, the driving assembly 251 includes an elastic assembly 3431; the moving part includes a transmission screw 3411; the transmission screw 3411 is threadedly connected to the rotating bracket 510; the loading buckle 3412 is fixedly connected to the transmission screw 3411, and when the loading buckle 3412 moves a preset stroke toward the proximal end of the shell 200, the loading buckle 3412 can be engaged with the shell 200; wherein, the elastic assembly 3431 can abut against the loading buckle 3412 to unlock the engaged loading buckle 3412, so that the transmission screw 3411 can move relative to the shell 200.

[0257] By threading the drive screw 3411 and the rotating bracket 510 in connection, since the rotating bracket 510 can only rotate relative to the housing 200, when the drive screw 3411 moves relative to the housing 200, the drive screw 3411 can drive the rotating bracket 510 to rotate relative to the housing 200. By fixedly connecting the loading buckle 3412 to the drive screw 3411, when the inner needle tube 120 and the outer needle tube 130 are loaded, the loading buckle 3412 can move a certain distance along the axis of the housing 200 toward the proximal end of the housing 200 and then engage with the housing 200. At this time, the loading buckle 3412 is fixed relative to the housing 200. When the inner needle tube 120 and the outer needle tube 130 are fired, the elastic component 3431 moves relative to the shell 200 so that the elastic component 3431 can abut against the loading buckle 3412 and apply a thrust to the loading buckle 3412 to move toward the distal direction of the shell 200, thereby unlocking the connection between the loading buckle 3412 and the shell 200, so that the transmission screw 3411 can move relative to the shell 200, thereby driving the rotating bracket 510 to rotate relative to the shell 200.

[0258] As shown in Figures 35 and 36, in one embodiment, the elastic component 3431 includes a rotary firing button 4311 and a rotary firing buckle 4312, and the rotary firing button 4311 is partially arranged outside the accommodating cavity; the rotary firing buckle 4312 is fixedly connected to the rotary firing button 4311, and the rotary firing buckle 4312 can abut against the loading buckle 3412. When the rotary firing button 4311 is operably moved relative to the shell 200, the rotary firing buckle 4312 can apply a force to the loading buckle 3412 to disengage the loading buckle 3412 from the shell 200.

[0259] By partially positioning the rotary firing button 4311 outside the accommodating cavity, an operator can apply a force to the rotary firing button 4311. By fixedly connecting the rotary firing catch 4312 to the rotary firing button 4311, when the rotary firing button 4311 is operatively moved, the rotary firing catch 4312 can move relative to the housing 200 along with the rotary firing button 4311. The rotary firing catch 4312 can abut against the chambering catch 3412. When the rotary firing button 4311 is operatively moved relative to the housing 200, the rotary firing catch 4312 can apply a force to the chambering catch 3412, thereby disengaging the chambering catch 3412 from the housing 200. This arrangement allows the chambering catch 3412 to be released from the engagement with the housing 200.

[0260] As shown in Figures 35 and 36, in one embodiment, the elastic component 3431 also includes a first elastic member 4313, which is sleeved on the transmission screw 3411, and the two ends of the first elastic member 4313 respectively abut against the shell 200 and the loading buckle 3412; wherein, when the loading buckle 3412 is engaged with the shell 200, the first elastic member 4313 is compressed; after the engagement between the loading buckle 3412 and the shell 200 is unlocked, the loading buckle 3412 moves toward the far end of the shell 200 under the action of the first elastic member 4313.

[0261] By arranging the first elastic member 4313 between the shell 200 and the loading buckle 3412, when the loading buckle 3412 is engaged with the shell 200, 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 3412 and the shell 200 is unlocked, the loading buckle 3412 is pushed by the elastic potential energy of the first elastic member 34313 to move relative to the shell 200 toward the distal end of the shell 200, thereby driving the transmission screw 3411 to move through the loading buckle 3412, thereby realizing the rotation of the rotating bracket 510 relative to the shell 200.

[0262] In this embodiment, the first elastic member 4313 is a spring that is sleeved on the drive screw 3411, with one end resting on the loading buckle 3412 and the other end resting on the end surface of the fixing ring 3700. When the loading buckle 3412 moves toward the proximal end of the housing 200, the spring is compressed.

[0263] As shown in Figures 35 and 36, in one embodiment, the drive assembly 251 also includes a loading push block 4321, which is movably connected to the shell 200, and one end of the loading push block 4321 abuts against the loading buckle 3412. The loading push block 4321 can be operably driven to move the loading buckle 3412 toward the proximal end of the shell 200 by a preset stroke so that the loading buckle 3412 is engaged with the shell 200.

[0264] By movably connecting the loading push block 4321 to the housing 200 and placing one end of the loading push block 4321 against the loading buckle 3412, when the loading push block is operably moved, the loading push block can exert a force on the loading buckle 3412, thereby driving the loading buckle 3412 to move toward the proximal end of the housing 200, thereby achieving the locking engagement between the loading buckle 3412 and the housing 200. The loading push block 4321 is mainly used to load the loading buckle 3412.

[0265] As shown in Figures 35 and 36, in one embodiment, the biopsy needle also includes a loading slider 3810, and the loading slider 3810 is partially arranged outside the accommodating cavity, and the part arranged inside the accommodating cavity can abut against the inner needle tube seat 400 and the outer needle tube seat 300. The loading slider 3810 is also connected to the loading push block 4321 to drive the loading push block 4321 to move relative to the shell 200; when the loading slider 3810 is operably moved, the loading slider 3810 can push the inner needle tube seat 400 and the outer needle tube seat 300 to move to a preset distance relative to the shell 200 and engage with the shell 200 to achieve loading.

[0266] As shown in Figures 35 and 36, the loading slider 3810 is primarily used to load the inner needle hub 400 and the outer needle hub 300. Specifically, a portion of the loading slider 3810 is disposed outside the accommodating cavity so that an operator can apply force to the loading slider 3810 to move the loading slider 3810 relative to the housing 200. Because the portion of the loading slider 3810 disposed within the accommodating cavity can abut against the inner needle hub 400 and the outer needle hub 300, when the loading slider 3810 is operably moved relative to the housing 200, the loading slider 3810 can push the inner needle hub 400 and the outer needle hub 300 relative to the housing 200, thereby causing the inner needle hub 400 and the outer needle hub 300 to move a certain distance relative to the housing 200 and then engage with the housing 200, thereby loading the inner needle hub 400 and the outer needle hub 300. The loading slide 3810 is also connected to the loading push block 4321, so that when the loading slide 3810 moves relative to the shell 200, it can also drive the loading push block 4321 to move relative to the shell 200, thereby realizing the connection between the loading buckle 3412 and the shell 200, so as to realize the loading of the loading buckle 3412.

[0267] Specifically, as shown in Figure 35, a third buckle 3210 is provided on the inner needle tube seat 400, and a second buckle 310 is provided on the outer needle tube seat 300. After the inner needle tube seat 400 and the outer needle tube seat 300 move a preset stroke toward the proximal direction of the shell 200 under the action of the loading slider 3810, the third buckle 3210 and the second buckle 310 can be engaged with the shell 200.

[0268] In one embodiment, as shown in FIG35 , the biopsy needle further includes a button 3830 , which is disposed at the proximal end of the shell 200 . The button 3830 is used to disengage the inner needle tube seat 400 and the outer needle tube seat 300 from the engagement with the shell 200 , thereby achieving the firing of the inner needle tube seat 400 and the outer needle tube 130 .

[0269] Specifically, as shown in Figure 35, the proximal end of the housing 200 is provided with an opening that communicates with the housing cavity of the housing 200. The button 3830 extends through the opening, with one end located outside the housing cavity and the other end located inside the housing cavity. A stop block 3110 is provided within the housing 200, adjacent to the location of the button 3830 within the housing cavity. The inner and outer needle tube seats 400 and 300 are each provided with a limit buckle at their ends near the proximal end of the housing 200. When the inner and outer needle tube seats 400 and 300 are pushed by the loading slider 3810 to move along the proximal end of the housing 200, the buckles on the inner and outer needle tube seats 400 and 300 engage with the limit block 3110. It should be noted that a guide rod is also provided on the limit block 3110, and a third driving member 910 is sleeved on the outside of the guide rod. One end of the third driving member 910 rests on the limit block 3110, and the other end rests on the outer needle tube seat 300. When the first buckle and the second buckle 310 on the inner needle tube seat 400 and the outer needle tube seat 300 are engaged with the limit block 3110, the third driving member 910 is in a compressed state.

[0270] When it is necessary to unlock the inner needle tube seat 400 and the outer needle tube seat 300, the button 3830 is pressed, causing the button 3830 to move along the axis of the housing 200 toward the proximal end of the housing 200, thereby causing the button 3830 to abut against the buckles of the inner needle tube seat 400 and the outer needle tube seat 300, thereby disengaging the inner needle tube seat 400 and the outer needle tube seat 300 from the stop block 3110. At this time, the inner needle tube seat 400 and the outer needle tube seat 300 move along the axis of the housing 200 toward the distal end of the housing 200 under the action of the elastic force of the third driving member 910. This process is the firing process of the inner needle tube 120 and the outer needle tube 130. Furthermore, an unlocking plate corresponding to the buckles on the inner needle tube seat 400 and the outer needle tube seat 300 is provided at one end of the button 3830 located in the accommodating cavity to apply force to the buckles on the inner needle tube seat 400 and the outer needle tube seat 300.

[0271] The working principle of the biopsy needle provided in the above embodiment is as follows (refer to Figures 35 to 36 for understanding):

[0272] Before inserting the biopsy needle into the human body, the biopsy needle needs to be loaded. When loading, the loading slider 3810 is pushed toward the proximal end of the shell 200. The loading slider 3810 drives the inner needle tube seat 400 and the outer needle tube seat 300 to move along the axis of the shell 200 toward the proximal end of the shell 200. During this process, the third driving member 910 is compressed, thereby accumulating elastic potential energy until the buckle structure in the outer needle tube seat 300 and the inner needle tube seat 400 is fixed on the limit block 3110 in the shell 200, and the third driving member 910 stops compressing. As the loading slide 3810 moves toward the proximal end of the housing 200, the loading slide 3810 drives the loading push block 4321 toward the proximal end of the housing 200. The loading push block 4321 pushes the loading buckle 3412 toward the proximal end of the housing 200. During this process, the loading buckle 3412 compresses the first elastic member 4313 and accumulates elastic potential energy until the buckle structure on the loading buckle 3412 engages with the housing 200. The loading buckle 3412 stops moving, and the first elastic member 4313 stops compressing. At this point, the inner needle tube seat 400, outer needle tube seat 300, and loading buckle 3412 of the biopsy needle are all in the loaded state, and the inner and outer needle tubes 130 and the rotary transmission mechanism 500 are also in the loaded state.

[0273] When the biopsy needle of this embodiment is inserted into a human body and punctured to the target location of the target tissue under the guidance of an imaging device, the button 3830 located at the proximal end of the housing 200 is pressed, causing the button 3830 to move toward the distal end of the housing 200. The unlocking plate on the button 3830 directly abuts against the snap structures in the inner and outer needle holders 400 and 300, which are then stressed and separated from the stop block 3110. At this point, the elastic potential energy stored in the third driver 910 during the loading process is converted into kinetic energy. Since one end of the third driver 910 contacts the outer needle holder 300, the conversion of elastic potential energy into kinetic energy causes the third driver 910 to push the outer needle holder 300 along the axial direction of the housing 200 toward the distal end of the housing 200. Simultaneously, the outer needle holder 300 pushes the inner needle holder 400 along the axial direction of the housing toward the distal end of the housing 200, thereby driving the inner and outer needle tubes 130 to move along the distal end of the housing 200.

[0274] After the biopsy needle is fired, the rotary firing button 4311 is toggled, causing it to move toward the distal end of the housing 200, thereby driving the rotary firing catch 4312 toward the distal end of the housing 200. When the rotary firing catch 4312 abuts against the snap structure on the loading catch 3412, the snap structure of the loading catch 3412 is forced to separate from the housing 200 by the force of the rotary firing catch 4312. After the snap structure of the loading catch 3412 separates from the housing 200, the first elastic member 4313 is no longer compressed. The elastic potential energy stored during the loading process is converted into kinetic energy, pushing the loading catch 3412 toward the distal end of the housing 200. At this time, the loading catch 3412 drives the drive screw 3411 toward the distal end of the housing 200. Because the rotating bracket 510 engages with the drive screw 3411 through the screw hole structure, as the drive screw 3411 moves relative to the housing 200, the rotating bracket 510 rotates about the axis of the housing 200 under the force of the drive screw 3411, driving the outer needle tube seat 300 and the inner needle tube seat 400 to rotate in the same direction, thereby causing the inner needle tube seat 400 and the outer needle tube 130 to rotate. During the rotation of the inner needle tube seat 400, the second elastic leaf 131 on the outer needle tube 130 that extends into the inner needle tube 120 also rotates, thereby separating the sample tissue in the inner needle tube from the surrounding tissue.

[0275] In some embodiments, as shown in Figures 37a, 37b, and 38a and 38b, schematic diagrams of gear position visualization are provided. Figures 37a and 37b indicate the current gear position as first gear, while Figures 38a and 38b indicate the current gear position as third gear. In practice, more or fewer gear positions can be set as needed. A gear position window 00 can be provided on the side of the housing 200 to display the current gear position. For example, the gear position window 00 can be located near the firing sampling button 401 to facilitate confirmation of the current gear position during the firing operation. The gear position number can be pre-marked on the second shift member. When the gear shift button 810 controls the first shift member to move the corresponding distance via the second shift member, the gear position number is visualized through the gear position window 00. This configuration eliminates the need to rotate the biopsy needle to observe the status of the gear shift button 810 to confirm the current gear position.

[0276] In some embodiments, as shown in FIG39 , the rotating bracket 510 is rotatably connected to the housing 200 via a bearing 3800 . The first driving member 540 is a spring and is sleeved outside the rotating bracket 510 . One end of the spring abuts against the moving member, and the other end abuts against the outer ring of the bearing 3800 . This allows the rotation of the rotating bracket 510 and the expansion and contraction of the spring to be independent of each other and not interfere with each other.

[0277] In some embodiments, as shown in Figure 39, the first unlocking member 600 only includes a connecting rod 610, and a step is provided on the connecting rod 610; a protrusion is provided at the distal end of the outer needle tube seat 300; when the outer needle tube seat 300 moves relative to the inner needle tube seat 400 to a preset distance before abutting against the large end surface, the protrusion abuts against the step, thereby pushing the connecting rod 610. When the outer needle tube seat 300 abuts against the large end surface and stops, the protrusion simultaneously pushes the connecting rod 610 to unlock the first buckle 522. Therefore, when the biopsy needle of this scheme is used, it only needs to be loaded and punctured to the sampling position, and the firing sampling button 401 can realize the one-button firing function, that is, the firing sampling and firing rotation transmission mechanism movement can be realized by one-button operation of the firing sampling button 401, and there is no need to set a firing button independently for the rotation transmission mechanism.

[0278] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0279] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A biopsy needle, comprising: Inner needle tube; An outer needle tube, sleeved outside the inner needle tube; case; An inner needle tube seat, movably disposed in the housing, and fixedly connected to the inner needle tube; An outer needle tube seat is movably arranged in the shell, the outer needle tube seat is fixedly connected to the outer needle tube, and the outer needle tube seat and the inner needle tube seat can move relative to each other; A rotary transmission mechanism is disposed in the housing; Wherein, the rotary transmission mechanism can be operably rotated relative to the shell to drive the inner needle tube and the outer needle tube to rotate synchronously.

2. The biopsy needle according to claim 1, characterized in that: The rotary transmission mechanism is connected to the inner needle tube seat and the outer needle tube seat; When the biopsy needle completes the sampling and firing, the inner needle tube and the outer needle tube are driven to rotate synchronously by controlling the rotary transmission mechanism.

3. The biopsy needle according to claim 2, characterized in that: The rotary transmission mechanism comprises: an actuator, the actuator being rotatably connected to the housing; A transmission assembly, the transmission assembly being in transmission connection with the actuator; and A driving assembly drives the actuator to rotate through the transmission assembly.

4. The biopsy needle according to claim 3, characterized in that: The actuator includes a rotating bracket, which is rotatable relative to the shell. The outer needle tube seat and the inner needle tube seat can move relative to the rotating bracket along the axial direction of the rotating bracket. The rotating bracket can drive the outer needle tube seat and the inner needle tube seat to rotate relative to the shell.

5. The biopsy needle according to claim 4, characterized in that: The rotating bracket is provided with a key at one end along the axis thereof, and the key is connected to the outer needle tube seat and / or the inner needle tube seat.

6. The biopsy needle according to claim 5, characterized in that: The transmission assembly includes a moving part, and the moving part is movably arranged relative to the housing; the moving part is in transmission connection with the rotating bracket, and the driving assembly drives the rotating bracket to rotate through the moving part.

7. The biopsy needle according to claim 6, characterized in that: A driving slide groove is provided on the peripheral side surface of the rotating bracket; the transmission assembly also includes: A raised portion connected to the moving member, a portion of the raised portion being slidably disposed in the driving slide groove; When the moving member moves relative to the shell along the first direction, the protrusion slides along the track of the driving slide groove, thereby driving the rotating bracket to rotate around the axis of the shell.

8. The biopsy needle according to claim 7, characterized in that: The drive assembly comprises: The first driving member has two ends respectively abutting against the moving member and the rotating bracket, and the first driving member can provide driving force for the moving member to move along the axial direction of the shell.

9. The biopsy needle according to claim 7, characterized in that: The driving slide groove includes a curved groove section, the moving member moves along the first direction, and the protrusion slides along the curved groove section to drive the rotating bracket to rotate.

10. The biopsy needle according to claim 7, characterized in that: The driving slide groove includes a straight groove section extending along the axial direction of the rotating bracket, and a curved groove section extending spirally around the axial direction of the rotating bracket, and two ends of the curved groove section are correspondingly connected to two ends of the straight groove section.

11. The biopsy needle according to claim 10, characterized in that: The straight groove section and the curved groove section each include a head end and a tail end, the head end is an end facing the proximal end of the shell, and the tail end is an end facing the distal end of the shell; A stop structure is provided at the head end of the straight groove segment and the tail end of the curved groove segment, or a stop structure is provided at the tail end of the straight groove segment and the head end of the curved groove segment; the stop structure is used to prevent the protrusion from retreating after the protrusion passes through the stop structure from one direction.

12. The biopsy needle according to claim 11, characterized in that: The stop structure at the head end of the straight groove segment is a stepped structure formed by a groove bottom higher than the groove bottom at the head end of the curved groove segment, so as to prevent the protruding portion from retreating after the protruding portion moves from the head end of the straight groove segment into the curved groove segment; The stop structure at the tail end of the curved groove segment is a stepped structure formed by a groove bottom higher than the tail end of the straight groove segment, so that the protrusion is prevented from retreating after entering the tail end of the straight groove segment from the tail end of the curved groove segment; Wherein, the groove bottoms of the curved groove section and the straight groove section are smooth surfaces.

13. The biopsy needle according to claim 12, characterized in that: The raised portion comprises: A support seat, configured with a receiving cavity having an opening at one end, wherein the support seat is fixedly connected to the moving member; A second driving member is disposed in the accommodating cavity, with one end abutting against the supporting seat; The movable member is movably disposed in the accommodating cavity and abuts against the other end of the second driving member. A portion of the movable member protrudes from the end surface of the supporting seat.

14. The biopsy needle according to claim 11, characterized in that: The stop structure at the head end of the straight groove section is a biasing member, and the biasing member is at least partially disposed in the straight groove section. When the protrusion moves along the second direction and passes through the biasing member, the biasing member is biased to avoid the protrusion. When the protrusion moves into the curved groove section, the biasing member is reset to prevent the protrusion from retreating. The first direction is opposite to the second direction.

15. The biopsy needle according to claim 6, characterized in that: The driving assembly includes an elastic assembly; the moving member includes: A transmission screw rod is threadedly connected to the rotating bracket; Wherein, two ends of the elastic component are respectively in contact with the rotating bracket and the transmission screw, so that the transmission screw can move relative to the housing.

16. The biopsy needle according to claim 6, characterized in that: The moving member is provided with a first buckle, and after the moving member moves a first preset stroke toward the proximal end of the shell along the axial direction of the shell, the first buckle is engaged with the shell; The biopsy needle also includes: The first unlocking member is movably connected to the shell, and the first unlocking member is operably connected to the first buckle, and is used to operably drive the first buckle to disengage from the shell.

17. The biopsy needle according to claim 6, characterized in that: The biopsy needle also includes a loading mechanism, which includes: a loading trigger rotatably connected to the housing; A driving rod is movably disposed in the housing and is drivingly connected to the loading trigger, and the driving rod is driven to move along the axis of the housing by the rotation of the loading trigger; Among them, the driving rod is constructed with a first stopper and a second stopper spaced apart along the extension direction of the driving rod, the first stopper is used to connect with the moving part, and the second stopper is used to connect with the outer needle tube seat and / or the inner needle tube seat, and the driving rod is driven to move along the axis of the shell by the rotation of the loading trigger, thereby driving the moving part to move and driving the outer needle tube seat and / or the inner needle tube seat to move.

18. The biopsy needle according to claim 17, characterized in that: The movable member is provided with a travel avoidance groove, and the first stopper is arranged in the travel avoidance groove, so that after the driving rod moves a second preset stroke under the drive of the loading trigger, the first stopper abuts against the movable member, thereby driving the movable member to move.

19. The biopsy needle according to claim 4, characterized in that: The outer needle tube seat and / or the inner needle tube seat are provided with a second buckle, and after the outer needle tube seat and / or the inner needle tube seat move toward the proximal end of the shell for a third preset stroke, the second buckle is engaged with the shell.

20. The biopsy needle according to claim 19, characterized in that A clamping groove is provided on the circumferential side surface of the outer needle tube seat and / or the inner needle tube seat, and a clamping protrusion is provided on the inner wall of the shell. When the second buckle is clamped with the shell, the clamping protrusion is clamped in the clamping groove.

21. The biopsy needle according to claim 1, characterized in that: The biopsy needle further comprises a needle core and a needle core seat, wherein the needle core seat is fixedly connected to the proximal end of the housing, the needle core is fixedly connected to the needle core seat, and a first guide portion is provided at one end of the needle core seat facing the distal end of the housing; The inner needle tube seat or the outer needle tube seat is provided with a second guide portion at one end thereof facing the proximal end of the housing. When the housing is clamped, the first guide portion is connected with the second guide portion in a cooperative manner.

22. The biopsy needle according to any one of claims 5 to 18, characterized in that: The biopsy needle also includes a shift mechanism, and the shift mechanism includes: a first shifting member, the first shifting member being slidably connected to the insertion key and used for limiting the moving positions of the inner needle tube seat and the outer needle tube seat; A second shifting member is movably disposed in the housing and is rotatably connected to the first shifting member, and the movement of the second shifting member can control the position of the first shifting member relative to the insertion key; A gear shift button, wherein the gear shift button is arranged on the housing and connected to the second shift member, and the gear shift button can be operably moved relative to the housing so as to control the position of the first shift member through the second shift member.

23. The biopsy needle according to claim 4, characterized in that: The driving assembly is operable. After the inner needle tube seat and the outer needle tube seat are fired to complete sampling, the driving assembly is operated to operably drive the rotary transmission mechanism multiple times, thereby realizing multiple synchronous rotations of the inner needle tube seat and the outer needle tube seat.

24. The biopsy needle according to claim 23, characterized in that The driving assembly is movably or rotatably arranged on the housing, and the transmission assembly includes a gear set. The driving assembly is transmission-connected with the rotating bracket via the gear set to drive the rotating bracket to rotate.

25. The biopsy needle according to claim 24, characterized in that The driving assembly includes a pressing assembly and a sector gear, wherein the pressing assembly is connected to the sector gear, and pressing the pressing assembly can drive the sector gear to rotate; The gear set is provided with a first transmission gear and a second transmission gear, the first transmission gear is transmission-connected with the sector gear, one end of the rotating bracket is provided with a third transmission gear, and the second transmission gear is transmission-connected with the third transmission gear.

26. The biopsy needle according to claim 25, characterized in that The pressing assembly includes a pressing piece and an elastic piece connected to each other, the pressing piece is connected to the sector gear, and the elastic piece is used to accumulate elastic potential energy when the pressing piece is pressed, so as to drive the pressing piece to reset when the pressing piece is released; the shell is provided with an opening, and at least part of the pressing assembly extends to the outside of the shell through the opening.

27. The biopsy needle according to any one of claims 4, characterized in that: The rotation transmission mechanism has a preset transmission ratio, and the operation of the driving assembly can at least enable the rotation angle of the rotating bracket in any rotation direction to be not less than 360° through the transmission assembly.

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