Biopsy device handle and biopsy device

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a biopsy device handle and a biopsy device.The biopsy device handle at least comprises a shell and a sliding assembly, the sliding assembly comprises an outer needle base, a middle needle base and a percussion elastic part, and the middle needle base is installed in a containing cavity of the outer needle base; the middle needle seat is wider than the outer needle seat body and the outer needle mounting part, and the middle needle seat is shorter than the accommodating cavity; the middle needle base is provided with a first position located on the near-end side and a second position located on the far-end side in the containing cavity. According to the structure, the middle needle base is arranged in the containing cavity of the outer needle base, the connection mode between the middle needle base and the inner needle base is simple and reliable, and compared with the structure mode that a front sliding frame and a rear sliding frame are connected end to end in the prior art, the structure is simpler, machining is easier, the production cost is lower, and the axial size of a sliding assembly is smaller; the overall rigidity of the sliding assembly is better, and the energy loss is smaller in the process that the sliding assembly slides in the shell after being triggered.

Description

Technical Field

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

[0002] The biopsy device is a medical instrument used to remove and collect tissue samples. It is suitable for sampling living tissue and aspirating cells from various organs such as the liver, kidneys, lungs, prostate, breast, thyroid, etc. It has the characteristics of simple and fast operation, easy use and rapid sampling.

[0003] The conventional biopsy device types mainly include two-needle type and three-needle type. Among them, the two-needle type biopsy device has an inner needle tube and an outer needle tube nested with each other, for example: a firing control mechanism and a biopsy needle disclosed in the Chinese invention patent with publication number CN117137536A, a sampling stroke adjustment device, a biopsy device and a sampling stroke adjustment method disclosed in the Chinese invention patent with publication number CN116919476A.

[0004] Among them, the three-needle biopsy device includes a fixed inner needle, a middle needle tube sleeved on the inner needle and capable of axial movement relative to the inner needle, and an outer needle tube sleeved on the middle needle tube and capable of axial movement relative to the middle needle tube. For example, a biopsy device handle disclosed in U.S. Patent No. US20180153525A1 is applied to the above three-needle biopsy device.

[0005] The present application is dedicated to providing a three-needle biopsy device and a biopsy device handle, wherein the biopsy device handle disclosed in U.S. Patent No. US20180153525A1 has the following defects: (1) The slide assembly includes a front slide and a rear slide connected end to end, which are used to distribute and control the displacement of the middle needle tube and the outer needle tube. However, this structural form in which the front slide and the rear slide are connected end to end has a large axial dimension, and the overall rigidity of the slide assembly is poor, resulting in a large energy loss during the firing process.

[0006] (2) A deflection structure is provided at the front end of the front slide, and a column is provided on the deflection structure. The column is used to realize the limit before firing. When firing, the column is acted on to drive the deflection structure to deflect, thereby releasing the limit and being fired. The deflection structure is provided on the front slide, resulting in a more complicated structure of the front slide. In addition, the deflection deformation of the deflection structure occurs during firing, resulting in unbalanced movement of the slide assembly after firing, large energy loss, and affecting the sampling effect.

[0007] (3) The slide switch of the lever release is arranged on the outside of the housing, and the slide switch needs to be pushed manually to achieve the locking and releasing of the lever. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a biopsy device handle and a biopsy device with an improved structure to solve the defects of the prior art.

[0009] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a handle of a biopsy device, comprising at least a shell and a sliding assembly arranged in the shell, wherein the sliding assembly comprises an outer needle seat, a middle needle seat and a firing elastic member, wherein the middle needle seat comprises a middle needle seat body, a first mounting hole penetrating the middle needle seat body in the axial direction and first guide portions arranged on both sides of the middle needle seat body; The outer needle seat comprises an outer needle seat body, a tail seat located at the proximal end of the outer needle seat body, and an outer needle mounting portion located at the distal end of the outer needle seat body, and the outer needle seat body is provided with a receiving cavity penetrating the outer needle seat body in the width direction; The middle needle seat is installed in the accommodating cavity, the width of the middle needle seat is greater than the width of the outer needle seat body and the outer needle mounting portion, and the length of the middle needle seat is less than the length of the accommodating cavity; the middle needle seat has a first position located at the proximal side and a second position located at the distal side in the accommodating cavity, and a limiting structure for limiting the middle needle seat to the first position and the second position respectively is provided between the accommodating cavity and the middle needle seat; The outer needle mounting portion is provided with a second mounting hole that penetrates axially, and the second mounting hole is coaxial with the first mounting hole; The tailstock is provided with a through cavity axially penetrating the tailstock, and second guide portions are provided on both sides of the tailstock; The firing elastic member is arranged on the proximal side of the middle needle seat.

[0010] In a preferred embodiment, a convex portion protruding from the upper surface of the outer needle hub body is provided at the distal end of the outer needle hub body or the top of the outer needle mounting portion.

[0011] A preferred embodiment further comprises a gland assembly, wherein the gland assembly comprises: A gland, the distal end of which is hinged to the distal end of the shell; A slide plate, the slide plate is slidably connected in the shell, a hook-shaped structure extending away from the gland and adapted to the protrusion is provided at the far end of the slide plate, the slide plate is elastic, and in a natural state, the hook-shaped structure and the protrusion overlap in the height direction; a long groove is provided on one side of the shell close to the gland, and the front middle part of the slide plate is exposed to the outside through the long groove; A connecting rod, one end of which is movably connected to the gland, and the other end of which is movably connected to the proximal end of the slide.

[0012] In a preferred embodiment, the slide plate includes a sliding support portion at a proximal end and an elastic cantilever extending from the sliding support portion toward a distal end, and the distal end of the elastic cantilever is bent to form the hook-shaped structure.

[0013] In a preferred embodiment, the sliding support portion is provided with a long hole movably connected to the connecting rod.

[0014] In a preferred embodiment, the connecting rod comprises a pair of connecting rod arms arranged opposite to each other, one end of the connecting rod arm is connected via a connecting arm, the connecting arm passes through the long hole and is movably connected to the slide plate, and the other end of the connecting rod arm is provided with a hinge column.

[0015] A preferred embodiment further comprises a gland locking structure, wherein the gland locking structure comprises: A locking plate, the locking plate being slidably connected in the housing, and the locking plate moving toward the proximal end based on the driving force of the outer needle seat; A locking elastic member, wherein the locking elastic member drives the locking plate to move toward the distal end; A locking groove, the locking groove is arranged on a side of the proximal end of the gland facing the housing, and the opening direction of the locking groove faces the distal end; A locking protrusion is fixedly connected to the locking plate and is located outside the shell, and the locking protrusion faces the locking groove.

[0016] A preferred embodiment further includes a firing button, which includes a button base, the button base is provided with a through groove for accommodating an elastic cantilever of a slide plate, a button is provided at the distal end of the button base, a button arm is provided at the proximal end of the key base and is located below the elastic cantilever, and the key base is also provided with a hinged portion between the button and the button arm.

[0017] In a preferred embodiment, the button is arranged on a side of the housing where a pressure cover is located, and a button hole adapted to the button is provided on the pressure cover.

[0018] A preferred embodiment further comprises a tail firing structure, wherein the tail firing structure comprises: a firing arm, the firing arm being slidably connected in the housing; A tail button, which is disposed at the proximal end of the housing and is fixedly connected to the firing arm; A reset elastic member, used for driving the tail button to reset; The firing end is arranged at the distal end of the firing arm and abuts against the proximal end side of the button arm, and is used for driving the button arm to rotate upward around the hinged portion.

[0019] In a preferred embodiment, a first guiding slope is disposed at the bottom of the button arm, and a second guiding slope matched with the first guiding slope is disposed at the firing end.

[0020] A preferred embodiment further includes a locking key, which includes a locking key base slidably connected to the shell, a locking button extending from the locking key base to the outside of the shell, and a locking protrusion extending inward from the locking key base. In the locked state, the locking protrusion abuts against the bottom of the button base on one side of the button.

[0021] In a preferred embodiment, the limiting structure includes a limiting protrusion and a limiting groove that are respectively arranged between the inner wall of the accommodating cavity and the outer wall of the middle needle seat and are adapted to each other, and two of the limiting protrusions and the limiting grooves are arranged side by side.

[0022] In a preferred embodiment, the first guide portion and the second guide portion are guide protrusions, and a first guide groove adapted to the guide protrusions is provided on the inner side of the shell.

[0023] A preferred embodiment further comprises a travel limit structure, wherein the travel limit structure comprises: A limiting base, slidably connected in the shell; A stopper base, a pair of stopper bases are arranged opposite to each other, a gap groove for accommodating the outer needle mounting portion and the outer needle seat body to pass through is arranged between the stopper bases, and the proximal end surface of the stopper base is a stopper surface for interacting with the distal end of the middle needle seat; A gear position limiting structure, arranged between the limiting base and the inner wall of the shell; A travel button extends from the limiting base to the outside of the shell.

[0024] In a preferred embodiment, the gear position limiting structure includes a gear position groove provided on the limiting base and at least two gear position protrusions provided on the inner wall of the shell and arranged side by side and adapted to the gear position groove.

[0025] The present embodiment also discloses a biopsy device, which at least includes the biopsy device handle and a needle assembly, wherein the needle assembly includes a fixed inner needle, a middle needle tube sleeved on the inner needle and capable of axial movement relative to the inner needle, and an outer needle tube sleeved on the middle needle tube and capable of axial movement relative to the middle needle tube, wherein the middle needle tube is provided with an incision penetrating into the inner cavity near the distal end, and the distal end of the outer needle is provided with an elastic cutting blade capable of extending into the incision; the proximal end of the middle needle tube is fixedly connected to the first mounting hole of the middle needle seat, and the proximal end of the outer needle tube is fixedly connected to the second mounting hole of the outer needle mounting portion.

[0026] Compared with the prior art, the biopsy device handle and the biopsy device of this embodiment have the following beneficial effects: (1) The sliding assembly in this embodiment sets the middle needle seat in the accommodating cavity of the outer needle seat. The connection between the middle needle seat and the inner needle seat is simple and reliable. Compared with the structure in which the front slide and the rear slide are connected end to end in the prior art, the structure is simpler, easier to process, and has a lower production cost. The axial size of the sliding assembly is smaller. Since the outer needle seat is subjected to overall force, the overall rigidity of the sliding assembly is better, and the energy loss is smaller during the sliding process in the shell after firing.

[0027] (2) The gland locking structure is hidden inside the gland and the housing. Both the gland and the sliding assembly are locked. The design is ingenious. In the cocked state, the gland locking structure is invisible, thus avoiding misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the structure of the biopsy device of this embodiment; Figure 2 for Figure 1 A schematic structural diagram of the biopsy device from another perspective; Figure 3 This is a schematic structural diagram of the biopsy device of this embodiment in a state where the gland is lifted up; Figure 4 for Figure 3 A schematic diagram of the internal structure of the handle of the biopsy device shown; Figure 5 This is a schematic diagram of the internal structure of the handle of the biopsy device of this embodiment in a ready-to-fire state; Figure 6 Schematic diagram of the internal structure of the handle of the biopsy device of this embodiment in the initial state and the state after firing; Figure 7 This is a schematic diagram of the structure of the sliding assembly in the handle of the biopsy device of this embodiment; Figure 8 for Figure 7 A schematic structural diagram of the sliding assembly in which the middle needle seat is located in the first position; Fig. 9 for Figure 7 A schematic structural diagram of the sliding assembly in which the middle needle seat is located at the second position; Fig.10 for Figure 7 A schematic diagram of the structure of the outer needle seat in the sliding assembly shown; Fig.11 for Figure 7 A schematic structural diagram of a middle needle seat in the sliding assembly shown; Fig.12 It is a partial schematic diagram of the firing mechanism in the handle of the biopsy device of this embodiment; Fig.13 This is a schematic diagram of the structure of the firing button in the handle of the biopsy device of this embodiment; Fig.14This is a schematic diagram of the structure of the tail firing structure in the handle of the biopsy device of this embodiment; Fig.15 This is a schematic diagram of the structure of the locking key in the handle of the biopsy device of this embodiment; Fig.16 This is a schematic diagram of the structure of the slide plate in the handle of the biopsy device of this embodiment; Fig.17 This is a schematic diagram of the structure of the connecting rod in the handle of the biopsy device of this embodiment; Fig.18 This is a schematic diagram of the structure of the locking structure of the cover in the handle of the biopsy device of this embodiment; Fig.19 This is a schematic diagram of the structure of the pressure cover in the handle of the biopsy device of this embodiment; Fig. 20 This is a schematic diagram of the inner structure of the shell in the handle of the biopsy device of this embodiment; Fig.21 This is a schematic diagram of the structure of the travel limit structure in the handle of the biopsy device of this embodiment; Fig. 22 Schematic diagram of the structure of the needle assembly in the biopsy device of this embodiment in the initial state and the state after firing; Fig.23 Schematic diagram of the structure of the needle assembly in the biopsy device of this embodiment during the pressurization process; Fig.24 Schematic diagram of the structure of the needle assembly in the biopsy device of this embodiment in the ready-to-fire state. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In this embodiment, the end close to the operator is set as the proximal end, and the end far from the operator is set as the distal end.

[0033] A biopsy device according to this embodiment, such as Figure 1-Figure 3 As shown, it includes a biopsy device handle and a needle assembly 90. Among them, the biopsy device of this embodiment is a three-needle biopsy device, such as Figure 22-Figure 24 As shown, the needle assembly 90 includes a fixed inner needle 93, a middle needle tube 92 which is sleeved on the inner needle 93 and can move axially relative to the inner needle, and an outer needle tube 91 which is sleeved on the middle needle tube 92 and can move axially relative to the middle needle tube. The middle needle tube 92 is provided with an incision 921 which penetrates into the inner cavity near the distal end, and the distal end of the outer needle is provided with an elastic cutting blade 911 which can extend into the incision.

[0034] The biopsy device handle of this embodiment, such as Figure 1-Figure 6 As shown, it includes a housing 10, a cover assembly 20, a sliding assembly 30, a firing button 40, a tail firing structure 50, a travel limit structure 60, a locking button 70, a cover locking structure 80 and a needle withdrawal structure 100. In this embodiment, the firing button 40, the travel limit structure 60, the locking button 70 and the needle withdrawal structure 100 are respectively located on the four surfaces of the housing 10, wherein the firing button 40 is located on the side of the housing where the cover assembly 20 is located, the travel limit structure 60 is located on the side opposite to the firing button 40, and the locking button 70 and the needle withdrawal structure 100 are respectively located on the other two sides of the housing. Each structure is reasonably arranged for easy operation by the user.

[0035] As a special feature of this embodiment, the sliding assembly 30 disposed in the housing 10, such as Figure 4-Figure 11 As shown, it includes an outer needle seat 31, a middle needle seat 32 and a firing elastic member 94. The structure of the middle needle seat 32 is as follows Fig.11 As shown, it includes a middle needle seat body 321, a first mounting hole 322 that penetrates the middle needle seat body axially, and first guides 325 disposed on both sides of the middle needle seat body. The proximal end of the middle needle tube 92 is fixedly connected to the distal end of the first mounting hole 322 of the middle needle seat, the proximal end of the inner needle 93 is fixedly mounted on the inner needle seat 931, the inner needle seat 931 is fixedly mounted in the housing 10, and the distal end of the inner needle 93 is inserted into the middle needle tube 92 at the proximal end of the first mounting hole 322.

[0036] In this embodiment, the structure of the outer needle seat 31 is as follows: Fig.10 As shown, it includes an outer needle seat body 311, a tail seat 312 located at the proximal end of the outer needle seat body, and an outer needle mounting portion 313 located at the distal end of the outer needle seat body. The outer needle seat body 311 is provided with a receiving cavity 315 that penetrates the outer needle seat body along the width direction, as shown in FIG. Figure 7-Figure 9As shown, the middle needle seat 32 is installed in the accommodating cavity 315 , the width of the middle needle seat 32 is greater than the width of the outer needle seat body 311 and the outer needle mounting portion 313 , and the length of the middle needle seat 32 is less than the length of the accommodating cavity 315 .

[0037] In this embodiment, Figure 8 As shown, the middle needle seat 32 has a first position located at the proximal side in the accommodating cavity 315, and, as shown in FIG. Fig. 9 As shown, the middle needle seat 32 has a second position located at the distal end side in the accommodating cavity 315. Correspondingly, a limiting structure for limiting the middle needle seat to the first position and the second position is provided between the accommodating cavity 315 and the middle needle seat 32. The limiting structure includes a limiting protrusion 316 and a limiting groove that are respectively provided between the inner wall of the accommodating cavity 315 and the outer wall of the middle needle seat 32 and are adapted to each other, and two of the limiting protrusions and the limiting grooves are provided side by side.

[0038] Preferably, in this embodiment, the limiting protrusion 316 is arranged on the inner wall of the accommodating cavity 315, and is symmetrically arranged between the top wall and the bottom wall. The limiting groove is arranged on the middle needle seat 32, and two limiting grooves are arranged side by side along the length direction, namely, the limiting groove 1 323 and the limiting groove 2 324. Figure 8 In the first position shown, the limiting protrusion 316 cooperates with the limiting groove 323. Fig. 9 In the second position shown, the limiting protrusion 316 cooperates with the second limiting groove 324 .

[0039] In this embodiment, the outer needle mounting portion 313 is provided with a second mounting hole 3131 axially penetrating therethrough, and the second mounting hole is coaxial with the first mounting hole. The proximal end of the outer needle tube 91 is fixedly connected to the distal end of the second mounting hole 3131, and the middle needle tube 92 is inserted into the outer needle tube 91 from the proximal end of the second mounting hole 3131.

[0040] In this embodiment, the tailstock 312 is provided with a through cavity 317 axially penetrating the tailstock, and the inner needle 93 is inserted into the middle needle tube 92 through the through cavity 317 .

[0041] In this embodiment, the firing elastic member 94 is disposed on the proximal side of the middle needle seat 32. Preferably, in this embodiment, the firing elastic member 94 is a compression spring, which is sleeved on the inner needle, and whose distal end passes through the through cavity 317 and abuts against or is connected to the proximal end of the middle needle seat 32, and whose proximal end abuts against or is fixed on the inner needle seat 931.

[0042] In this embodiment, the second guide portion 318 is provided on both sides of the tailstock. Preferably, in this embodiment, the first guide portion 325 and the second guide portion 318 are guide protrusions. Fig. 20As shown, a first guide groove 17 adapted to the guide protrusion is provided on the inner side of the housing 10 .

[0043] The sliding assembly in this embodiment arranges the middle needle seat in the accommodating cavity of the outer needle seat. The connection between the middle needle seat and the inner needle seat is simple and reliable. Compared with the structural form of the front slide and the rear slide connected end to end in the prior art, the structure is simpler, easier to process, and has lower production costs. The axial size of the sliding assembly is smaller. Since the outer needle seat is subjected to overall force, the overall rigidity of the sliding assembly is better, and the energy loss is smaller during the sliding process in the shell after firing.

[0044] In this embodiment, a convex portion 314 protruding from the upper surface of the outer needle seat body 311 is disposed on the top of the outer needle mounting portion 313 , and the convex portion 314 can also be disposed at the distal end of the outer needle seat body 311 .

[0045] The gland assembly 20 of this embodiment is as follows: Figure 3 , Figure 4 As shown, it includes a pressure cover 21, a slide plate 22 and a connecting rod 23. Fig.19 As shown, the far end of the gland 21 is provided with a rotating shaft 212. Fig. 20 As shown, a rotating shaft hole 12 adapted to the rotating shaft 212 is provided at the distal end of the housing 10, and the gland and the housing are hingedly connected by the cooperation of the rotating shaft and the rotating shaft hole.

[0046] In this embodiment, the structure of the slide plate 22 is as follows: Fig.16 As shown, it includes a sliding support portion 221 on the proximal side and an elastic cantilever 222 extending from the sliding support portion to the distal end. The distal end of the elastic cantilever 222 is bent toward the side away from the pressure cover to form a hook-like structure 223. Preferably, an inclined transition portion 224 is also provided between the hook-like structure 223 and the elastic cantilever 222.

[0047] In this embodiment, the slide plate 22 is slidably connected to the housing 10 via the sliding support portion 221. Fig. 20 As mentioned above, a second guide groove 15 adapted to the sliding support portion 221 is provided on the inner side of the housing 10 .

[0048] In this embodiment, a long slot 104 is provided on one side of the housing 10 close to the gland 21, wherein the front middle portion of the slide plate 22 close to the proximal end is exposed to the outside through the long slot 104. One end of the connecting rod 23 is movably connected to the gland 21, and the other end of the connecting rod 23 is movably connected to the proximal end of the slide plate 22, wherein the connection position is located at the position where the long slot 104 is located.

[0049] As a preference, Fig.17As shown, the connecting rod 23 includes a pair of connecting rod arms 231 arranged opposite to each other, one end of the connecting rod arm 231 is connected by a connecting arm 232, and the other end of the connecting rod arm 231 is provided with a hinge column 233. Fig.19 As shown, the pressure cover 21 is provided with a hinge hole 213 adapted to the hinge column 233 .

[0050] As a preference, Fig.16 As shown, in this embodiment, the sliding support portion 221 is provided with a long hole 225 movably connected to the connecting rod, and the connecting arm 232 passes through the long hole 225 and is movably connected to the slide plate. The connecting rod 23 of this embodiment has a simple structure, and the connection method with the gland and the slide plate is fast and efficient, which is convenient for assembly; in particular, the setting of the long hole 225 makes the gland flip up longer.

[0051] In this embodiment, in a natural state, the hook-shaped structure 223 and the protrusion 314 overlap in the height direction, and the hook-shaped structure 223 and the protrusion 314 are combined and separated based on the elasticity of the slide plate.

[0052] In this embodiment, the initial free state is as follows Figure 6 As shown, in this state, the structure of the sliding assembly 30 is as follows Figure 8 As shown, the middle needle seat 32 is in the first position; the state of the needle assembly 90 is as shown Fig. 22 As shown, the elastic cutting blade 911 of the outer needle tube 91 penetrates into the middle needle tube 92 from the incision 921. When biopsy sampling is required, Figure 3 , Figure 4 As shown, the pressure cover 21 is flipped up, and the slide plate 22 is driven to slide toward the distal end by the connecting rod 23 until the hook structure 223 passes over the protrusion 314 and hooks the distal end surface of the protrusion 314 .

[0053] Next, the cover 21 is pressed downward. In the initial stroke of the downward pressure, the firing elastic member presses against the middle needle seat, the middle needle seat remains stationary, and the slide plate drives the outer needle seat to move a certain distance toward the proximal end, until Fig. 9 As shown, the outer needle seat moves relative to the middle needle seat until the middle needle seat is in the second position. Fig.23 As shown, the outer needle seat drives the outer needle tube to move relative to the middle needle tube, and the elastic cutting blade 911 is pulled out from the self-incision 921.

[0054] Continue to press the cover down. At this time, the outer needle seat contacts the inner needle seat, and the slide plate drives the sliding assembly to move toward the proximal end until the outer needle seat is in contact with the inner needle seat. Figure 5 As shown, the pressure cover is snapped into place with the shell, wherein the movement of the sliding assembly compresses the firing elastic member, completing the preparation work before firing.

[0055] In this state, the cover is locked with the housing by the cover locking structure 80, so that the biopsy device is kept in the ready-to-fire state.

[0056] As a preference, Fig.18 , Fig.19 As shown, the gland locking structure 80 of this embodiment includes a locking plate 81, a locking protrusion 83, a locking elastic member 85 and a locking groove 214 arranged on the gland. The locking plate 81 is slidably connected to the housing. As a preferred embodiment, Fig. 20 As shown, a limiting plate 14 is provided near the proximal end of the shell to limit the position of the locking plate in the shell, and the distal end of the locking plate 81 is limited by a limiting step 18.

[0057] exist Figure 4 In the state shown, the distal end of the locking plate does not contact the proximal end of the outer needle seat, and the distal end of the locking plate is limited by the limiting step 18. Figure 4 In the state shown, during the process of pressing the pressure cover, the sliding assembly slides toward the proximal end until the proximal end of the outer needle seat contacts the distal end of the locking plate. As the outer needle seat continues to slide toward the proximal end, the locking plate 81 is pushed toward the proximal end, and the locking protrusion 83 is driven to enter the locking groove 214, and the locking elastic member 85 is compressed, that is, Figure 5 In this state, based on the matching relationship between the locking protrusion 83 and the locking groove 214, the pressure cover cannot be turned up. Since the pressure cover cannot be turned up, the sliding assembly is restricted. Figure 5 Shown in cocked position.

[0058] In this embodiment, the locking groove 214 is disposed on the side of the proximal end of the gland facing the housing, and the opening direction of the locking groove 214 faces the distal end. Accordingly, the locking protrusion 83 faces the locking groove 214 .

[0059] Preferably, in this embodiment, the locking protrusion 83 is located outside the housing and is fixedly connected to the locking plate 81 via the support arm 82 .

[0060] In this embodiment, a spring mounting column 84 is provided at the proximal end of the locking plate 81. The locking elastic member 85 is preferably a compression spring. When the gland is locked, the locking elastic member 85 is compressed. When the sliding assembly is fired and released, the locking elastic member drives the locking plate to move toward the distal end, and the locking protrusion 83 moves out of the locking groove 214, releasing the lock on the gland so that the gland can be flipped up again. Figure 1 As shown, a recess 102 is provided on the housing 10 adjacent to the proximal end of the gland. After firing is completed, the operator can operate the gland to flip up at the recess 102 .

[0061] In this embodiment, the pressure cover locking structure is hidden in the pressure cover and the shell, and the pressure cover and the sliding assembly are both locked. The design concept is ingenious. In the ready-to-fire state, the pressure cover locking structure is invisible, which can avoid misoperation.

[0062] In this embodiment, Figure 1 As shown, the firing mechanism includes a firing button 40 near the distal end of the handle and a tail firing structure 50 located at the proximal end surface of the handle. The operator can press one of the firing button 40 and the tail firing structure 50 to perform a firing operation.

[0063] In this embodiment, Fig.12 , Fig.13 As shown, the firing button 40 includes a button base 42, the button base 42 is provided with a through slot 45 for accommodating the elastic cantilever of the slide plate, and a button 41 is provided at the far end of the button base 42, and the button 41 is provided on the side where the pressure cover is located on the housing, as shown in FIG. Fig.19 As shown, the pressure cover 21 is provided with a button hole 211 adapted to the button 41 .

[0064] In this embodiment, a button arm 43 located below the elastic cantilever is provided at the proximal end of the button base 42, and a hinge portion 44 located between the button 41 and the button arm 43 is also provided on the button base 42. Preferably, in this embodiment, the hinge portion 44 is a hinge hole, and accordingly, a hinge column adapted to be connected to the hinge hole is provided inside the housing.

[0065] In this embodiment, a torsion spring 47 is further provided at the bottom of the button 41 for resetting the button after being pressed.

[0066] like Fig.12 As shown, when firing is required, the button 41 is pressed, causing the firing button 40 to rotate as a whole around the hinge 44, wherein the button arm 43 is lifted upward, thereby lifting the distal end of the elastic cantilever 222, driving the hook structure 223 to release the restriction on the protrusion 314, and the sliding assembly 30 moves toward the distal end under the action of the firing elastic member, thereby achieving firing.

[0067] like Fig.12 , Fig.14 As shown in FIG. 1 , the tail firing structure 50 of this embodiment includes a tail button 51, a firing arm 52 and a resetting elastic member 55. The firing arm 52 is slidably connected to the housing. Fig. 20As shown, the inner side of the housing is provided with a third guide groove 16 adapted to the firing arm 52. The tail button 51 is provided at the proximal end of the housing and fixedly connected to the proximal end of the firing arm 52. The resetting elastic member 55 is preferably a compression spring, which is sleeved on a spring mounting column 54. One end of the spring mounting column 54 is fixedly connected to the inner side of the tail button 51. When the tail button 51 is pressed, the resetting elastic member 55 is compressed. When the pressure on the tail button 51 is released, the resetting elastic member 55 drives the tail button to reset.

[0068] In this embodiment, the end of the firing arm 52 away from the tail button is the firing end. Fig.12 As shown, the firing end abuts against the proximal side of the button arm 43, and is used to drive the button arm 43 to rotate upward around the hinge 44, thereby lifting the distal end of the elastic cantilever 222, driving the hook structure 223 to release the restriction on the protrusion 314, and the sliding assembly 30 moves toward the distal end under the action of the firing elastic member, thereby realizing tail firing.

[0069] Preferably, in this embodiment, a first guiding slope 46 is provided at the bottom of the button arm 43, and correspondingly, a second guiding slope 53 adapted to the first guiding slope 46 is provided at the firing end. The first guiding slope 46 and the second guiding slope 53 cooperate with each other to reduce the resistance when the tail is pressed.

[0070] In this embodiment, Figure 1 , Fig.12 As shown, after the firing preparation is completed, a locking key 70 is also provided to prevent accidental triggering. The locking key 70 includes a locking key base 72 slidably connected to the housing, a locking button 71 extending from the locking key base 72 to the outside of the housing, and a locking protrusion 73 extending from the locking key base to the inside. Fig.12 In the locked state shown, the locking protrusion 73 abuts against the bottom of the button base 42 on one side of the button. In this state, pressing the button 41 cannot drive the button base 42 to rotate because the locking protrusion 73 is supported by the bottom of the button base 42 on this side. Correspondingly, pressing the tail button 51 cannot drive the button base 42 to rotate, thus ensuring that the biopsy device will not be triggered by mistake. When firing is required, the locking button 71 is pushed to drive the locking protrusion 73 away from the bottom of the button base on one side of the button, thereby releasing the restriction on the button base, so that firing can be performed by pressing the button 41 or the tail button 51.

[0071] In this embodiment, a travel limit structure 60 is also included to control and adjust the puncture travel of the needle assembly. Fig. 20 , Fig.21As shown, the travel limit structure 60 includes a limit base 66, a stop base 61, a travel button 64 and a gear limit structure. The limit base 66 is slidably connected in the housing, a pair of stop bases 61 are arranged opposite to each other, and a gap groove 63 for accommodating the outer needle mounting portion and the outer needle seat body is arranged between the pair of stop bases 61, and the proximal end surface of the stop base 61 is a stop surface 62 for interacting with the distal end of the middle needle seat. The travel button 64 is located outside the housing, and the travel button 64 is connected to the limit base 66 through a connecting portion 67 that penetrates the housing wall.

[0072] In this embodiment, the gear position limiting structure is arranged between the limiting base 66 and the inner wall of the shell. Fig.21 As shown, the bottom of the limiting base 66 is provided with a limiting groove 65. Fig. 20 As shown, a plurality of gear convex portions 13 adapted to the limiting grooves 65 are distributed along the length direction on the inner wall of the housing. Figure 5 In the state shown, the position of the travel limit structure 60 can be adjusted by the travel button 64 so that the limit groove 65 is matched with the corresponding gear position protrusion 13.

[0073] As a preferred embodiment, in this embodiment, Fig. 20 As shown, a displacement groove 11 for accommodating the movement of the travel button 64 is provided on the outer wall of the shell.

[0074] exist Figure 5 In the state shown, after adjusting the position of the travel limit structure 60, the button 41 or the tail button 51 is used to fire. After firing, the sliding assembly 30 moves toward the distal end as a whole. During this movement, the state of the sliding assembly 30 is as follows Fig. 9 As shown, the middle needle seat is located at the second position on the distal side, and the outer needle tube and the middle needle tube are in the state as shown in FIG. Fig.23 Until the distal ends of the outer needle mounting portion and the outer needle seat body pass through the gap groove 63, and the distal end of the middle needle seat 32 contacts the stop surface 62 of the stop base 61, the middle needle seat no longer moves toward the distal end due to the blocking effect of the limit base, while the outer needle seat continues to move toward the distal end under the action of inertia. Figure 8 In the state shown in FIG. 1 , during this process, the elastic cutting edge 911 of the outer needle tube 91 enters from the incision 921 of the middle needle tube 92, as shown in FIG. Fig. 22 As shown, the tissue in the tissue cavity 922 is cut.

[0075] like Figure 1 As shown, in this embodiment, a damping structure 103, such as embossing, a concave-convex staggered structure, etc., is provided on the outer wall of the housing 10 to facilitate single-handed grasping of the handle of the biopsy device.

[0076] like Figure 1As shown, in this embodiment, the housing 10 is also provided with a window 101. Fig.10 As shown, a visible marking portion 319 is provided on the outer needle seat 31 , and the visible marking portion 319 is observed through the window 101 to determine the state of the handle of the biopsy device.

[0077] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biopsy device handle, comprising at least a housing and a sliding assembly disposed in the housing, wherein the sliding assembly comprises an outer needle seat, a middle needle seat and a firing elastic member, characterized in that: The middle needle seat comprises a middle needle seat body, a first mounting hole penetrating the middle needle seat body in the axial direction, and first guide portions arranged on both sides of the middle needle seat body; The outer needle seat comprises an outer needle seat body, a tail seat located at the proximal end of the outer needle seat body, and an outer needle mounting portion located at the distal end of the outer needle seat body, and the outer needle seat body is provided with a receiving cavity penetrating the outer needle seat body in the width direction; The middle needle seat is installed in the accommodating cavity, the width of the middle needle seat is greater than the width of the outer needle seat body and the outer needle mounting portion, and the length of the middle needle seat is less than the length of the accommodating cavity; the middle needle seat has a first position located at the proximal side and a second position located at the distal side in the accommodating cavity, and a limiting structure for limiting the middle needle seat to the first position and the second position respectively is provided between the accommodating cavity and the middle needle seat; The outer needle mounting portion is provided with a second mounting hole that penetrates axially, and the second mounting hole is coaxial with the first mounting hole; The tailstock is provided with a through cavity axially penetrating the tailstock, and second guide portions are provided on both sides of the tailstock; The firing elastic member is arranged on the proximal side of the middle needle seat.

2. The biopsy device handle according to claim 1, characterized in that: The distal end of the outer needle seat body or the top of the outer needle mounting portion is provided with a convex portion protruding from the upper surface of the outer needle seat body.

3. The biopsy device handle according to claim 2, characterized in that: Also included is a gland assembly, the gland assembly comprising: A gland, the distal end of which is hinged to the distal end of the shell; A slide plate, the slide plate is slidably connected in the shell, a hook-shaped structure extending away from the gland and adapted to the protrusion is provided at the far end of the slide plate, the slide plate is elastic, and in a natural state, the hook-shaped structure and the protrusion overlap in the height direction; a long groove is provided on one side of the shell close to the gland, and the front middle part of the slide plate is exposed to the outside through the long groove; A connecting rod, one end of which is movably connected to the gland, and the other end of which is movably connected to the proximal end of the slide.

4. The biopsy device handle according to claim 3, characterized in that: The slide plate comprises a sliding support portion at a proximal end and an elastic cantilever extending from the sliding support portion to a distal end, and the distal end of the elastic cantilever is bent to form the hook-shaped structure.

5. The biopsy device handle according to claim 4, characterized in that: The sliding support portion is provided with a long hole movably connected to the connecting rod.

6. The biopsy device handle according to claim 5, characterized in that: The connecting rod comprises a pair of connecting rod arms arranged opposite to each other, one end of the connecting rod arm is connected via a connecting arm, the connecting arm passes through the long hole and is movably connected to the slide plate, and the other end of the connecting rod arm is provided with a hinge column.

7. The biopsy device handle according to any one of claims 3 to 6, characterized in that: It also includes a gland locking structure, which includes: A locking plate, the locking plate being slidably connected in the housing, and the locking plate moving toward the proximal end based on the driving force of the outer needle seat; A locking elastic member, wherein the locking elastic member drives the locking plate to move toward the distal end; A locking groove, the locking groove is arranged on a side of the proximal end of the gland facing the housing, and the opening direction of the locking groove faces the distal end; A locking protrusion is fixedly connected to the locking plate and is located outside the shell, and the locking protrusion faces the locking groove.

8. The biopsy device handle according to any one of claims 4 to 6, characterized in that: It also includes a firing button, which includes a button base, the button base is provided with a through groove for accommodating an elastic cantilever of a slide plate, a button is provided at the distal end of the button base, a button arm is provided at the proximal end of the key base under the elastic cantilever, and the key base is also provided with a hinged portion between the button and the button arm.

9. The biopsy device handle according to claim 8, characterized in that: The button is arranged on one side of the housing where a pressure cover is located, and a button hole adapted to the button is arranged on the pressure cover.

10. The biopsy device handle according to claim 8, characterized in that: Also included is a tail firing structure, the tail firing structure comprising: a firing arm, the firing arm being slidably connected in the housing; A tail button, which is disposed at the proximal end of the housing and is fixedly connected to the firing arm; A reset elastic member, used for driving the tail button to reset; The firing end is arranged at the distal end of the firing arm and abuts against the proximal end side of the button arm, and is used for driving the button arm to rotate upward around the hinged portion.

11. The biopsy device handle according to claim 10, characterized in that: The bottom of the button arm is provided with a first guiding slope, and the firing end is provided with a second guiding slope matched with the first guiding slope.

12. The biopsy device handle according to any one of claims 9 to 11, characterized in that: It also includes a locking key, which includes a locking key base slidably connected to the shell, a locking button extending from the locking key base to the outside of the shell, and a locking protrusion extending inward from the locking key base. In the locked state, the locking protrusion abuts against the bottom of the key base on one side of the button.

13. The biopsy device handle according to claim 1, characterized in that: The limiting structure includes a limiting protrusion and a limiting groove that are respectively arranged between the inner wall of the accommodating cavity and the outer wall of the middle needle seat and are adapted to each other. Two of the limiting protrusions and the limiting grooves are arranged side by side.

14. The biopsy device handle according to claim 1, characterized in that: The first guide portion and the second guide portion are guide protrusions, and a first guide groove matched with the guide protrusions is arranged on the inner side of the shell.

15. The biopsy device handle according to claim 1, characterized in that: It also includes a travel limit structure, and the travel limit structure includes: A limiting base, slidably connected in the shell; A stopper base, a pair of stopper bases are arranged opposite to each other, a gap groove for accommodating the outer needle mounting portion and the outer needle seat body to pass through is arranged between the stopper bases, and the proximal end surface of the stopper base is a stopper surface for interacting with the distal end of the middle needle seat; A gear position limiting structure, arranged between the limiting base and the inner wall of the shell; A travel button extends from the limiting base to the outside of the shell.

16. The biopsy device handle according to claim 15, characterized in that: The gear position limiting structure comprises a gear position slot arranged on the limiting base and at least two gear position protrusions arranged on the inner wall of the shell and distributed side by side and adapted to the gear position slot.

17. A biopsy device, characterized in that: At least the biopsy device handle and needle assembly according to any one of claims 1 to 16, the needle assembly comprising a fixed inner needle, a middle needle tube sleeved on the inner needle and capable of axial movement relative to the inner needle, and an outer needle tube sleeved on the middle needle tube and capable of axial movement relative to the middle needle tube, the middle needle tube is provided with an incision penetrating into the inner cavity near the distal end, and the distal end of the outer needle is provided with an elastic cutting blade capable of extending into the incision; the proximal end of the middle needle tube is fixedly connected to the first mounting hole of the middle needle seat, and the proximal end of the outer needle tube is fixedly connected to the second mounting hole of the outer needle mounting portion.

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