Biopsy rotary cutting device

Abstract

The utility model provides a biopsy rotary cutting device which comprises a shell, a sampling tank and a driving piece, the near end of the shell is provided with an opening communicated with a containing space of the shell, a limiting structure is arranged at the opening, the shell is connected with a puncture knife tube and a negative pressure system, the far end of the sampling tank is rotatably arranged in the opening, and the driving piece is arranged on the sampling tank. A plurality of sampling cavities which are circumferentially and uniformly distributed along the central axis of the sampling tank are formed in the sampling tank, a plurality of protruding parts which are arranged along the circumferential side of the sampling tank are arranged at the far end of the sampling tank, and each protruding part is located between every two adjacent sampling cavities; a first via hole and a second via hole which are communicated with the sampling cavities are formed in the far end, corresponding to any sampling cavity, of the sampling tank, the first via hole is communicated with the puncture knife tube, the second via hole is communicated with a negative pressure system, the driving part drives the sampling tank to rotate along the central axis of the sampling tank, and the driving part is provided with an encoder for controlling the rotation angle of the driving part. The biopsy rotary cutting device can realize accurate positioning of the sampling cavity, and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a biopsy rotary cutting device. Background Art

[0002] The minimally invasive breast excision system is a new minimally invasive biopsy system that has emerged in recent years. It mainly promotes the traditional open breast mass surgery to a minimally invasive method. It can perform repeated cutting on suspicious breast lesions to obtain breast histological specimens, providing more and better methods for the discovery and diagnosis of breast cancer, and also providing a technical basis for the minimally invasive resection of benign tumors.

[0003] In clinical applications, in conventional vacuum-assisted minimally invasive breast excision systems, the excision blade with an excision element cuts the sample tissue, and the sample tissue is sucked out into a sample collection device through a negative pressure system for the doctor to observe during or after the operation to make a preliminary judgment on the patient's condition.

[0004] In recent years, in order to adapt to surgeries that require the removal of large amounts of sample tissue, a rotary cutting needle has been proposed. This rotary cutting needle is constructed by installing multiple sampling slots in a storage tank, which is driven to rotate by a handle. The sampling slots are then rotated to different sampling slots installed in the tank body in sequence according to the positioning feedback signals detected by the sensor. As a result, samples from different lesion areas can be drawn from the knife tube into different sampling slots through negative pressure as needed. Multiple sampling slots can be installed in a tank body, reducing the number of times the sampling slots need to be disassembled and installed after sampling. However, in order to achieve precise positioning of the storage tank, a large number of high-precision sensors or high-precision encoders are required, which results in excessively high costs for rotary cutting needles. Relying solely on high-precision encoders will result in cumulative errors after long-term use. Relying solely on low-precision sensors or low-precision encoders will also result in positioning errors, leading to blocked passages and inability to sample normally.

[0005] Therefore, the present invention is dedicated to providing a biopsy rotary cutting device to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a biopsy rotary cutting device, which can achieve accurate positioning of the sampling cavity of the sampling canister through the cooperation of the limiting structure, the protrusion and the driving part, and ensure the smooth entry of the lesion tissue into the sampling cavity. It has the characteristics of low cost, high positioning accuracy and easy operation.

[0007] The technical solutions provided by this utility model are as follows:

[0008] A biopsy rotary cutting device, comprising:

[0009] The shell has an opening at the proximal end thereof which is connected to the accommodating space of the shell, a limiting structure is provided at the opening, and the shell is connected to a puncture knife tube and a negative pressure system.

[0010] A sampling tank, the distal end of the sampling tank is rotatably arranged in the opening, and a plurality of sampling cavities uniformly distributed circumferentially along the central axis of the sampling tank are arranged in the sampling tank, and the distal end of the sampling tank is provided with a plurality of protrusions arranged along the circumference of the sampling tank, each of the protrusions is respectively located between two adjacent sampling cavities, and a first through hole and a second through hole connected to the sampling cavity are opened at the distal end of the sampling tank corresponding to any of the sampling cavities, the first through hole is used to connect with the puncture knife tube, and the second through hole is used to connect with the negative pressure system.

[0011] A driving member is used to drive the sampling tank to rotate along the central axis of the sampling tank, and the driving member is configured with an encoder for controlling the rotation angle of the driving member.

[0012] In which, when the driving member drives the sampling tank to rotate in the first direction, the protrusion is not affected by the limiting action of the limiting structure; when the driving member drives the sampling tank to rotate in the second direction, the protrusion is suitable for being affected by the limiting action of the limiting structure, so that the sampling tank stops rotating, thereby making the corresponding first through hole of the sampling cavity connected with the puncture knife tube, and the second through hole connected with the negative pressure system, and the first direction and the second direction are opposite.

[0013] In some embodiments, the present invention further comprises a sensing member and an initial positioning member provided at one of the protrusions, wherein the initial positioning member is installed at the distal end of the sampling tank;

[0014] When the driving member drives the sampling tank to rotate so that the sensor corresponds to and identifies the initial positioning member, the driving member drives the sampling tank to continue rotating so that the protrusion provided with the initial positioning member is limited by the limiting structure.

[0015] In some embodiments, the limiting structure includes a spring piece and a limiting block, one end of the spring piece is connected to the housing, and the limiting block is provided at an end of the spring piece away from the housing.

[0016] The limit block has a first limit surface and a first guide surface in the second direction, and the protrusion has a second limit surface and a second guide surface. The second guide surface is used to slide with the first guide surface when the sampling tank rotates in the first direction, and the second limit surface is used to limit and cooperate with the first limit surface when the sampling tank rotates in the second direction.

[0017] In some embodiments, a notch groove is provided at the proximal end of the shell, and one edge of the notch groove coincides with one side of the proximal end of the shell and is in communication with the outside.

[0018] The spring piece is arranged in the notch groove, and one end of the spring piece away from the limiting block is connected to the distal end of the notch groove.

[0019] In some embodiments, the invention further comprises a control unit electrically connected to the encoder, wherein the control unit is configured to receive feedback signals from the encoder and the sensor;

[0020] The control unit is used to control the driving member to drive the sampling tank to continue rotating according to the feedback signal of the sensor. When the protrusion is limitedly engaged with the limiting structure, the control unit is used to control the driving member to stop working according to the feedback signal of the encoder.

[0021] In some embodiments, the sampling tank includes a mounting plate and a tank body disposed on one side of the mounting plate, and the protrusion is disposed on the mounting plate.

[0022] The tank body is coaxially arranged with the mounting plate, the first through hole and the second through hole are provided on the mounting plate, the sampling cavity is provided in the tank body, and the end of the sampling cavity away from the mounting plate is an open end.

[0023] In some embodiments, the sampling tank further includes a sampling basket disposed in one-to-one correspondence with the sampling cavity, and the sampling basket extends into the sampling cavity through the open end.

[0024] The sampling basket is provided with a plurality of leakage holes communicating with the sampling cavity on its peripheral side. The sampling basket is provided with a docking hole communicating with the sampling cavity on one side close to the mounting plate. The docking hole is suitable for communicating with the first through hole.

[0025] In some embodiments, the sampling tank further includes a transmission rod and a driving gear fixedly sleeved on the outside of the transmission rod. The transmission rod is arranged on a side of the mounting plate away from the tank body and is coaxially arranged with the tank body.

[0026] The driving member is in transmission connection with the driving gear, and is used to drive the driving gear to rotate, thereby driving the transmission rod, the mounting plate and the tank body to rotate.

[0027] In some embodiments, a connecting plate is further included in the housing, the connecting plate is rotatably sleeved on the outside of the transmission rod, and the driving gear is located on a side of the connecting plate away from the mounting plate.

[0028] The connecting plate is provided with a first connecting hole and a second connecting hole. One end of the puncture knife tube and one end of the negative pressure system are both arranged in the shell and are connected with the first connecting hole and the second connecting hole respectively.

[0029] In some embodiments, a rear cover assembly is provided at one end of the sampling basket away from the mounting plate. When the sampling basket is disposed in the sampling cavity, the rear cover assembly is tightly connected to the tank body.

[0030] The biopsy rotary cutting device provided by the utility model has the following beneficial effects:

[0031] 1. The utility model provides a biopsy rotary cutting device, which provides a limiting structure at the opening and a plurality of protrusions on the outer peripheral side of the sampling can. When working, the sampling can is driven to rotate relative to the outer shell by a driving member, and the driving member controls the sampling can to rotate a preset angle in a first direction according to the rotation angle of the driving member recorded by the encoder so that the limiting structure is located between the two protrusions, and then drives the sampling can to rotate in a second direction by the driving member. The rotation of the sampling can in the second direction will be limited by the limiting structure, and the driving member stops working according to the rotation angle of the encoder so that the sampling can stops rotating and stays at the corresponding protrusion, thereby making the first through hole of the corresponding sampling cavity connected to the puncture knife tube, and the second through hole connected to the negative pressure system, thereby sucking the diseased tissue into the sampling cavity. It only requires the driving member, the limiting structure and the protrusion to cooperate with each other to achieve this, without the need for a large number of high-precision sensors or encoders, effectively reducing the cost of the rotary cutting device, and with high positioning accuracy.

[0032] 2. The utility model provides a biopsy rotary cutting device, which is provided with an initial positioning part at a protrusion. When the medical staff uses the rotary cutting device, the sampling canister can be driven to rotate a certain angle in a first direction by the driving part, so that when the sensor located in the shell corresponds to the initial positioning part, the control unit controls the driving part to drive the sampling canister to continue rotating according to the feedback signal of the sensor, so that the specific sampling cavity of the sampling canister stays in the initial position, which is convenient for the medical staff to identify the sampling cavity, so that when the lesion tissue in the sampling cavity needs to be removed, it is convenient for the medical staff to accurately take the corresponding sampling basket, or number each sampling cavity based on the initial position, so that it is convenient for the medical staff to use the biopsy rotary cutting device to send samples of different lesion areas into the sampling basket of the corresponding numbered sampling cavity.

[0033] 3. The utility model provides a biopsy rotary cutting device, in which a sampling basket is provided in the sampling cavity. A plurality of leakage holes connected to the sampling cavity are provided on the sampling basket, so that blood and water of the lesion tissue can flow into the sampling cavity through the leakage holes, thereby realizing the separation of blood and water from the lesion tissue, making it convenient for medical staff to detect the lesion tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of this solution.

[0035] Figure 1 This is a structural diagram of a biopsy rotary cutting device provided by the utility model;

[0036] Figure 2 This is a structural schematic diagram of a sampling canister of a biopsy peeling device provided by the utility model;

[0037] Figure 3 This is an exploded view of a sampling canister of a biopsy peeling device provided by the utility model;

[0038] Figure 4 This is a front view of a sampling canister of a biopsy peeling device provided by the utility model;

[0039] Figure 5 This is a structural schematic diagram of a shell of a biopsy peeling device provided by the utility model;

[0040] Figure 6 This is a structural diagram of an embodiment of the cooperation between the limiting structure and the protruding portion of a biopsy peeling device provided by the present invention;

[0041] Figure 7 This is a structural diagram of another embodiment of the cooperation between the limiting structure and the protruding portion of a biopsy peeling device provided by the present invention;

[0042] Figure 8 This is a cross-sectional view of a biopsy rotary cutting device provided by the utility model;

[0043] Figure 9 It is a rear view of a sampling canister of a biopsy rotary cutting device provided by the utility model.

[0044] Description of Figure Numbers:

[0045] Housing 1, opening 11, limiting structure 12, spring piece 121, limiting block 122, first limiting surface 123, first guide surface 124, notch groove 13;

[0046] Sampling tank 2, mounting plate 21, protrusion 211, second limiting surface 2111, second guide surface 2112, first protrusion 2113, second protrusion 2114, third protrusion 2115, first through hole 212, second through hole 213, initial positioning member 214;

[0047] Tank body 22, sampling chamber 221, transmission rod 222, driving gear 223;

[0048] Sampling basket 23, leakage hole 231, docking hole 232, rear cover assembly 233, connecting plate 24, puncture knife tube 241, negative pressure system 242. DETAILED DESCRIPTION

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0050] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0051] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0052] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] In one embodiment, a biopsy rotary cutting device is described, wherein the limiting structure 12, the protrusion 211 and the driving member cooperate with each other to achieve accurate positioning of the sampling cavity 221 while reducing the cost of the biopsy rotary cutting device.

[0054] See the attached drawings in the specification Figures 1 to 9 When the medical staff uses the biopsy peeling device, the end of the biopsy peeling device close to the medical staff is the proximal end, the end of the biopsy peeling device away from the medical staff is the distal end, the first direction is the sampling canister 2 rotating in one direction relative to the shell 1, either clockwise or counterclockwise, and the second direction is the sampling canister 2 rotating in the other direction relative to the shell 1, either clockwise or counterclockwise.

[0055] Specifically, a biopsy rotary cutting device includes a shell 1, a sampling tank 2 and a driving member. The proximal end of the shell 1 is provided with an opening 11, and the interior of the shell 1 is provided with a accommodating space connected to the opening 11. A limiting structure 12 is provided at the opening 11, and the shell 1 is also connected to a puncture knife tube 241 and a negative pressure system 242. Furthermore, the distal end of the sampling tank 2 is rotatably provided in the opening 11, and a plurality of sampling cavities 221 are provided in the sampling tank 2. The plurality of sampling cavities 221 are evenly distributed in a circular shape along the central axis of the sampling tank 2 in the sampling tank 2, so that when the sampling tank 2 rotates relative to the shell 1, the plurality of sampling cavities 221 are sequentially and simultaneously connected to the puncture knife tube 241 and the negative pressure system 242, so that the negative pressure generated by the negative pressure system 242 adsorbs the diseased tissue into the sampling cavity 221.

[0056] It is understandable that in the prior art, in order to ensure that the multiple sampling cavities 221 are accurately and simultaneously connected to the puncture tube 241 and the negative pressure system 242 as the sampling canister 2 rotates, a sensor is usually installed at each sampling cavity 221 for positioning, which significantly increases the cost of the biopsy device. Moreover, the sensor will accumulate errors during long-term use, resulting in errors in the corresponding communication relationship between the sampling cavity 221 and the puncture tube 241. Debris can easily clog the pipeline, preventing normal sampling.

[0057] Therefore, in the biopsy rotary cutting device provided by the present invention, see the accompanying drawings of the specification. Figure 6 and Figure 7 The distal end of the sampling canister 2 is provided with a plurality of protrusions 211 that cooperate with the limiting structure 12. The protrusions 211 are arranged along the circumference of the sampling canister 2, and each protrusion 211 is located between two adjacent sampling cavities 221. That is, the number of protrusions 211 is the same as the number of sampling cavities 221. The protrusions 211 are configured such that when the sampling canister 2 rotates in a first direction, the protrusions 211 do not engage with the limiting structure 12, allowing the sampling canister 2 to rotate freely relative to the housing 1. When the sampling canister 2 rotates in a second direction, the protrusions 211 are adapted to be limited by the limiting structure 12, preventing the sampling canister 2 from rotating freely relative to the housing 1. Correspondingly, each sampling cavity 221 of the distal end of the sampling tank 2 is provided with a first through hole 212 and a second through hole 213 connected to the sampling cavity 221 . The first through hole 212 is used to communicate with the puncture knife tube 241 , and the second through hole 213 is used to communicate with the negative pressure system 242 .

[0058] Furthermore, the driving member is used to drive the sampling tank 2 to rotate along the central axis of the sampling tank 2, and the driving member is equipped with an encoder for recording the rotation angle of the driving member, that is, the rotation angle of the sampling tank 2 can be controlled by the encoder. When the driving member drives the sampling tank 2 to rotate in a first direction, the sampling tank 2 can rotate freely. When the driving member drives the sampling tank 2 to rotate in a second direction opposite to the first direction, the protrusion 211 is limited by the limiting structure 12, causing the sampling tank 2 to stop rotating. After the sampling tank 2 is limited by the limiting structure 12, the first through hole 212 of the corresponding sampling cavity 221 is connected to the puncture knife tube 241, and the second through hole 213 is connected to the negative pressure system 242, so that the negative pressure of the negative pressure system 242 is transmitted to the puncture knife tube 241 through the sampling cavity 221, thereby sucking the diseased tissue into the sampling cavity 221.

[0059] For the convenience of explanation, see the accompanying drawings. Figure 8, the first direction is set to be counterclockwise, the second direction is set to be clockwise, and the first direction and the second direction are opposite. There are three protrusions 211 and three sampling cavities 221, and the three protrusions 211 are respectively a first protrusion 2113, a second protrusion 2114 and a third protrusion 2115 set in the clockwise direction. In clinical applications, when performing a biopsy operation, the medical staff first uses the driving member to control the clockwise rotation so that the limiting structure 12 is limited and matched with any one of the protrusions 211. For the convenience of explanation, the first protrusion 2113 is limited by the protrusion 211, so that the sampling tank 2 stops rotating. At this time, the first through hole 212 of a sampling cavity 221 is connected to the puncture knife tube 241, and the second through hole 213 is connected to the negative pressure system 242, so that the diseased tissue is sucked into this sampling cavity 221 through the puncture knife tube 241. After the sampling cavity 221 is filled with the diseased tissue, the driving member drives the sampling tank to rotate counterclockwise, and controls the rotation angle of the sampling tank 2 through the encoder, so that the limiting structure 12 is located between the second protrusion 2114 and the third protrusion 2115, and then controls the sampling tank 2 to rotate clockwise through the driving member, so that the second protrusion 2114 is limited by the limiting structure 12, and the sampling tank 2 stops rotating. At this time, the first through hole 212 of the other sampling cavity 221 is connected to the puncture knife tube 241, and the second through hole 213 is connected to the negative pressure system 242, and the diseased tissue is sucked into this sampling cavity 221 through the puncture knife tube 241. After the sampling cavity 221 is filled with the diseased tissue, the driving member drives the sampling tank 2 to rotate counterclockwise again, and controls the rotation angle of the sampling tank 2 through the encoder, so that the limiting structure 12 is located between the third protrusion 2115 and the first protrusion 2113, and then controls the sampling tank 2 to rotate clockwise through the driving member, so that the third protrusion 2115 is limited by the limiting structure 12, and the sampling tank 2 stops rotating. At this time, the first through hole 212 of the third sampling cavity 221 is connected to the puncture knife tube 241, and the second through hole 213 is connected to the negative pressure system 242, and the diseased tissue is sucked into this sampling cavity 221 through the puncture knife tube 241.

[0060] It should be noted that the encoder provided with the driver only needs to detect the rotation angle of the sampling canister 2 caused by the driver. Each time the encoder causes the sampling canister 2 to rotate counterclockwise by a preset angle, the limiting structure 12 is positioned between the corresponding two protrusions 211. Therefore, the interaction between the limiting structure 12, the protrusions 211, and the driver reduces the number of sensors required, lowering costs. Furthermore, each sampling cavity 221 is mechanically positioned by the limiting structure 12 and the protrusions 211, achieving more accurate positioning.

[0061] In one embodiment, see the accompanying drawings Figure 3, this embodiment further illustrates a biopsy peeling device. Among them, a biopsy peeling device also includes a sensor and an initial positioning member 214, and the initial positioning member 214 is set as one, and one initial positioning member 214 is set at the distal end of the sampling canister 2 and is located at a protrusion 211. Correspondingly, the biopsy peeling device also includes a peeling handle (not shown in the drawings), which is set on one side of the shell 1, and the sensor is set in the peeling handle and is located on the side of the sampling canister 2 away from the rear cover assembly. Accordingly, the sensor can be set as an infrared detector or a magnetic induction detector, so that when the initial positioning member 214 corresponds to the sensor, the sensor can identify the initial positioning member.

[0062] The sensor is used to drive the sampling tank 2 to rotate when the driving member drives the sampling tank 2 to rotate and the sensor corresponds to the initial positioning member 214 and identifies it. The driving member will drive the sampling tank 2 to continue rotating until the protrusion 211 provided with the initial positioning member 214 is limited by the limiting structure 12, so that it can be determined which sampling cavity 221 is connected to the first through hole 212 and the puncture knife tube 241 at this time, so that medical staff can accurately take the corresponding sampling basket 23 when the diseased tissue in the sampling cavity 221 needs to be removed later.

[0063] It is understandable that the position of the initial positioning member 214 is not fixed, and it can be set on the left side of a protrusion 211 or on the right side of the protrusion 211. For example, the initial positioning member 214 is set on the left side of a protrusion 211. When the driving member drives the sampling canister 2 to rotate in the first direction to the initial positioning member 214, the driving member drives the sampling canister 2 to rotate in the second direction until the limiting structure 12 is limited and engaged with the corresponding protrusion 211, thereby connecting a sampling cavity 221 with the negative pressure system 242 and the puncture knife tube 241. When the initial positioning member 214 is set on the right side of a protrusion 214, the driving member drives the sampling tank 2 to rotate in the first direction by a preset angle (the position of the initial positioning member 214 is determined, and the size of this preset angle is also determined), so that the limiting structure 12 is located between the protrusion 211 provided with the initial positioning member 214 and the adjacent protrusion 211, and the sensor controls the driving member to drive the sampling tank 2 to rotate in the second direction until the limiting structure 12 is engaged with the corresponding protrusion 211. Therefore, through the setting of the initial positioning member 214, the driving member controls the rotation of the sampling tank 2, and after the sampling tank 2 stops rotating by controlling the sensor, the sampling tank 2 can be positioned at a specific position, which is convenient for medical staff to identify the sampling cavity 221, and further convenient for medical staff to accurately remove the lesion tissue in the corresponding sampling cavity 221.

[0064] Therefore, when the initial positioning member 214 corresponds to the sensor and is identified, the sampling cavity 221 located below the sampling tank 2 is connected to the puncture knife tube 241. When using the biopsy excision device, medical staff can use the sensor and the initial positioning member 214 to determine the specific position of a sampling cavity 221, so as to accurately discharge the diseased tissue in the sampling cavity 221 during subsequent use.

[0065] Furthermore, a biopsy rotary cutting device also includes a control unit electrically connected to the encoder and the sensor, the control unit is used to receive feedback signals from the encoder and the sensor, and when the driver drives the sampling tank 2 to rotate in the second direction, so that the protrusion 211 cooperates with the limiting structure 12, the control unit is used to control the driver to brake (the driver stops working) according to the feedback signal of the encoder. Correspondingly, when the driver drives the sampling tank 2 to rotate in the first direction, when the sensor corresponds to the initial positioning member 214 and identifies it, the control unit drives the sampling tank 2 to continue rotating according to the feedback signal of the sensor, so that the protrusion 211 provided with the initial positioning member 214 is subject to the limiting effect of the limiting structure 12. In addition, it should be pointed out that the driver is generally configured as a motor, and the motor can automatically lock after stopping working under the action of the control unit to ensure that the lesion tissue smoothly passes through the puncture knife tube 241 and enters the sampling cavity 221.

[0066] In one embodiment, see the accompanying drawings Figures 2 to 7 This embodiment further describes the limiting structure 12. The limiting structure 12 includes a spring 121 and a limiting block 122. One end of the spring 121 is connected to the proximal end of the housing 1, and the limiting block 122 is provided at the end of the spring 121 away from the housing 1. The limiting block 122 needs to be limited and matched with the protrusion 211. Therefore, the limiting block 122 is suitable for contacting and matching with the protrusion 211.

[0067] Furthermore, the limiting block 122 is provided with a first limiting surface 123 and a first guide surface 124 in the second direction. Accordingly, a second limiting surface 2111 and a second guide surface 2112 are provided on the protrusion 211. The second guide surface 2112 is configured to slidably engage with the first guide surface 124 when the sampling can 2 rotates in the first direction, allowing the protrusion 211 to rotate to the other side of the limiting block 122. The second limiting surface 2111 is configured to engage with the first limiting surface 123 when the sampling can 2 rotates in the second direction. The protrusion 211 is acted upon by the first limiting surface 123 of the limiting block 122, preventing the sampling can 2 from further rotating.

[0068] It is understood that when the driving member drives the sampling canister 2 to rotate in the first direction, the second guide surface 2112 first compresses and engages with the first guide surface 124, then moves along the first guide surface 124, causing the spring 121 to deform, allowing the protrusion 211 to smoothly rotate to the other side of the stop block 122. When the driving member drives the sampling canister 2 to rotate in the second direction, the second stop surface 2111 first engages and engages with the first stop surface 123, which acts to prevent the protrusion 211 from continuing to rotate, thereby stopping the sampling canister 2 from rotating.

[0069] See the attached drawings in the specification Figure 6 ,exist Figure 6 The invention provides a method for the stop block 122 and the protrusion 211 to cooperate. The first stop surface 123 and the second stop surface 2111 are both vertical planes to prevent the spring piece 121 from deforming when the two contact each other, thereby allowing the stop block 122 to play a limiting role. The second guide surface 2112 and the first guide surface 124 are both convex arc surfaces, so that they can slide together when they contact and squeeze, and at the same time, they can deform the spring piece 121, thereby ensuring that the protrusion 211 can rotate to the other side of the stop structure 12.

[0070] See the attached drawings in the specification Figure 7 ,exist Figure 7 Another way of matching the limiting block 122 and the protrusion 211 is provided, the second guide surface 2112 and the first guide surface 124 are both convex arc surfaces, and the first limiting surface 123 and the second limiting surface 2111 are both inclined surfaces, which can further enhance the limiting effect of the two.

[0071] Of course, in actual production applications, there are many forms of the first limiting surface 123, the first guide surface 124, the second limiting surface 2111 and the second guide surface 2112, which are not described one by one here and are all within the protection scope of the present utility model.

[0072] In addition, a notch groove 13 is provided at the proximal end of the shell 1, one edge of the notch groove 13 coincides with one side of the proximal end of the shell 1 and is connected to the outside world. Accordingly, the spring piece 121 is provided in the notch groove 13, and the end of the spring piece 121 away from the limit block 122 is connected to the distal end of the notch groove 13.

[0073] In one embodiment, see the accompanying drawings Figures 1 to 5This embodiment further describes the sampling tank 2. The sampling tank 2 includes a mounting plate 21 and a tank body 22 disposed on one side of the mounting plate 21. Accordingly, a protrusion 211 is disposed on the mounting plate 21 along its circumference. The tank body 22 and the mounting plate 21 are coaxially disposed. A first through-hole 212 and a second through-hole 213 are also defined in the mounting plate 21. A sampling cavity 221 is defined within the tank body 22, with the end of the sampling cavity 221 facing away from the mounting plate 21 being an open end.

[0074] Furthermore, the sampling tank 2 also includes a sampling basket 23, which is arranged in a one-to-one correspondence with the sampling cavity 221, and the sampling basket 23 extends into the sampling cavity 221 through the open end. Accordingly, a docking hole 232 is provided on the side of the sampling basket 23 near the mounting plate 21. The docking hole 232 is suitable for connecting with any of the first through holes 212 to allow the diseased tissue to enter the sampling basket 23 through the puncture knife tube 241, the first through hole 212, and the docking hole 232. In addition, a plurality of leakage holes 231 are provided around the sampling basket 23, which are connected to the sampling cavity 221, so that blood and water can enter the sampling cavity 221 through the leakage holes 231, thereby separating the diseased tissue from the blood and water.

[0075] Further, see the accompanying drawings Figure 1 A rear cover assembly 233 is provided at one end of the sampling basket 23 away from the mounting plate 21 . When the sampling basket 23 is arranged in the sampling cavity 221 , the rear cover assembly 233 can be tightly connected to the tank body 22 to ensure the negative pressure adsorption force of the negative pressure system 242 .

[0076] The rear cover assembly 233 includes a rear cover body and a handle provided on the rear cover body. The rear cover body is tightly connected to the tank body 22 , and the handle facilitates medical staff to remove the rear cover body from the tank body 22 .

[0077] In one embodiment, see the accompanying drawings Figure 1 This embodiment further describes the sampling canister 2. The biopsy peeling device also includes a transmission rod 222 and a drive gear 223. The transmission rod 222 is disposed on the side of the mounting plate 21 away from the canister 22 and is coaxial with the canister 22. The transmission rod 222 is disposed within the housing 1. The drive gear 223 is fixedly mounted on the outside of the transmission rod 222 and is in transmission connection with a drive member located within the housing. The drive member drives the drive gear 223 and transmission rod 222, thereby causing the sampling canister 2 to rotate.

[0078] Furthermore, the biopsy peeling device further includes a connecting plate 24 disposed in the housing 1 . The connecting plate 24 is rotatably sleeved on the outer side of the transmission rod 222 , and the driving gear 223 is located on a side of the connecting plate 24 away from the mounting plate 21 .

[0079] Correspondingly, the connecting plate 24 is provided with a first connecting hole and a second connecting hole. One end of the puncture blade tube 241 and one end of the negative pressure system 242 pass through one side of the housing 1 and are disposed within the housing 1. One end of the puncture blade tube 241 and one end of the negative pressure system 242 are connected to the first connecting hole and the second connecting hole, respectively. During operation, the driving member causes the sampling tank 2 to rotate relative to the connecting plate 24 to adjust the positional relationship between the first through hole 212 and the second through hole 213 of each sampling cavity 221 relative to the connecting plate 24.

[0080] The implementation principle is: when medical staff uses the biopsy peeling device, the sampling slot position is initialized, and the control unit first controls the driving member to drive the sampling tank 2 to rotate in the first direction. If the initial positioning member of the biopsy peeling device is set between the protrusion 211 and the next protrusion 211, then when the control unit receives the corresponding signal between the sensor and the initial positioning member 214, it means that the limiting structure 12 is between the protrusion 211 and the next protrusion 211, and the control unit controls the driving member to brake (stop working).

[0081] Similarly, when the sampling slot position is initialized, the control unit first controls the driving member to drive the sampling tank 2 to rotate in the first direction. If the initial positioning member 214 is set at a position opposite to the protrusion 211, when the control unit receives the feedback signal from the sensor and the initial positioning member 214, the limiting structure 12 is near the corresponding position of the protrusion 211. The control unit controls the driving member to drive the sampling tank 2 to continue to rotate in the first direction. After the encoder records a certain rotation angle, the limiting structure 12 has passed the protrusion 211 with the initial positioning member 214 and is located between the protrusion 211 with the initial positioning member 214 and the next protrusion. Then the control unit controls the driving member to brake (stop working).

[0082] The control unit then controls the driver to rotate the sampling canister 2 in the second direction until the retaining structure 12 engages with the corresponding protrusion 211. Upon receiving feedback from the encoder, the control unit controls the driver to stop, thereby connecting one sampling cavity 221 to the negative pressure system 242 and the puncture tube 241, allowing the lesion tissue to enter the sampling cavity 2221 through the puncture tube 241. After one sampling cavity 221 is filled with lesion tissue, the driver controls the sampling canister 2 to rotate in the first direction by a predetermined angle, positioning the retaining structure 12 between the two protrusions 211. The driver then controls the sampling canister 2 to rotate in the second direction, positioning one protrusion 211 with the retaining structure 12, thereby connecting the other sampling cavity 221 to the puncture tube 241. Similarly, when the second sampling cavity 221 is filled with lesion tissue, the sampling canister 2 continues to rotate in the first direction by a predetermined angle, then in the second direction, and so on until the biopsy procedure is completed.

[0083] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and such improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A biopsy peeling device, characterized in that: include: A housing, wherein a proximal end of the housing is provided with an opening communicating with the accommodating space of the housing, a limiting structure is provided at the opening, and the housing is connected to a puncture knife tube and a negative pressure system; A sampling canister, wherein the distal end of the sampling canister is rotatably disposed in the opening, and a plurality of sampling cavities uniformly distributed circumferentially along the central axis of the sampling canister are disposed in the sampling canister, and a plurality of protrusions disposed along the circumference of the sampling canister are disposed at the distal end of the sampling canister, each of the protrusions being located between two adjacent sampling cavities, and a first through hole and a second through hole communicating with the sampling cavity are provided at the distal end of the sampling canister corresponding to any of the sampling cavities, the first through hole being used to communicate with the puncture knife tube, and the second through hole being used to communicate with the negative pressure system; a driving member, the driving member being used to drive the sampling tank to rotate along the central axis of the sampling tank, and the driving member being provided with an encoder for recording the rotation angle of the driving member; In which, when the driving member drives the sampling tank to rotate in the first direction, the protrusion is not affected by the limiting action of the limiting structure; when the driving member drives the sampling tank to rotate in the second direction, the protrusion is suitable for being affected by the limiting action of the limiting structure, so that the sampling tank stops rotating, thereby making the corresponding first through hole of the sampling cavity connected with the puncture knife tube, and the second through hole connected with the negative pressure system, and the first direction and the second direction are opposite.

2. The biopsy device according to claim 1, characterized in that: It also includes a sensing member and an initial positioning member provided at one of the protruding portions, wherein the initial positioning member is installed at the distal end of the sampling tank; When the driving member drives the sampling tank to rotate so that the sensor corresponds to and identifies the initial positioning member, the driving member drives the sampling tank to continue rotating so that the protrusion provided with the initial positioning member is limited by the limiting structure.

3. The biopsy rotary cutting device according to claim 1, characterized in that: The limiting structure includes a spring piece and a limiting block, one end of the spring piece is connected to the housing, and the limiting block is arranged at the end of the spring piece away from the housing; The limit block has a first limit surface and a first guide surface in the second direction, and the protrusion has a second limit surface and a second guide surface. The second guide surface is used to slide with the first guide surface when the sampling tank rotates in the first direction, and the second limit surface is used to limit and cooperate with the first limit surface when the sampling tank rotates in the second direction.

4. The biopsy device according to claim 3, characterized in that: A notch is provided at the proximal end of the shell, one side of the notch coincides with one side of the proximal end of the shell and is in communication with the outside; The spring piece is arranged in the notch groove, and one end of the spring piece away from the limiting block is connected to the distal end of the notch groove.

5. The biopsy rotary cutting device according to claim 2, characterized in that: It also includes a control unit, the control unit is used to receive feedback signals from the encoder and the sensor; The control unit is used to control the driving member to drive the sampling tank to continue rotating according to the feedback signal of the sensor. When the protrusion is limitedly engaged with the limiting structure, the control unit is used to control the driving member to stop working according to the feedback signal of the encoder.

6. A biopsy rotary cutting device according to any one of claims 1 to 5, characterized in that: The sampling tank includes a mounting plate and a tank body arranged on one side of the mounting plate, and the protrusion is arranged on the mounting plate; The tank body is coaxially arranged with the mounting plate, the first through hole and the second through hole are provided on the mounting plate, the sampling cavity is provided in the tank body, and the end of the sampling cavity away from the mounting plate is an open end.

7. The biopsy rotary cutting device according to claim 6, characterized in that: The sampling tank further includes a sampling basket provided in one-to-one correspondence with the sampling cavity, and the sampling basket extends into the sampling cavity through the open end; The sampling basket is provided with a plurality of leakage holes communicating with the sampling cavity on its peripheral side. The sampling basket is provided with a docking hole communicating with the sampling cavity on one side close to the mounting plate. The docking hole is suitable for communicating with the first through hole.

8. The biopsy rotary cutting device according to claim 7, characterized in that: The sampling tank further comprises a transmission rod and a driving gear fixedly sleeved on the outside of the transmission rod, wherein the transmission rod is arranged on a side of the mounting plate away from the tank body and is coaxially arranged with the tank body; The driving member is in transmission connection with the driving gear, and is used to drive the driving gear to rotate, thereby driving the transmission rod, the mounting plate and the tank body to rotate.

9. The biopsy rotary cutting device according to claim 8, characterized in that: It also includes a connecting plate disposed in the housing, the connecting plate being rotatably sleeved on the outer side of the transmission rod, and the driving gear being located on a side of the connecting plate away from the mounting plate; The connecting plate is provided with a first connecting hole and a second connecting hole. One end of the puncture knife tube and one end of the negative pressure system are both arranged in the shell and are connected with the first connecting hole and the second connecting hole respectively.

10. The biopsy rotary cutting device according to claim 7, characterized in that: A rear cover assembly is provided at one end of the sampling basket away from the mounting plate. When the sampling basket is arranged in the sampling cavity, the rear cover assembly is tightly connected to the tank body.

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