Biopsy forceps capable of continuously sampling

Abstract

The invention provides biopsy forceps capable of continuously sampling. The biopsy forceps comprise a tube body, a pulley, a first operating piece, a rope, a second operating piece and a plurality of forceps heads, wherein the pulley is rotatably mounted at the sampling end of the tube body around the axial direction of the pulley; the rope sleeves the pulley and is connected with the first operating piece, and the first operating piece can drive the rope to rotate around the pulley; the forceps heads move along with the rope to sequentially reach or leave a preset position relative to the pulley, each forceps head comprises a pressed part, a shearing part and a closed elastic part, and when the forceps heads are located at the preset position, the shearing parts stretch out of the pipe cavity so as to shear a sampling target; the second operating part comprises a flexible driving rod, the other end of the flexible driving rod can be far away from or abut against the pressed part located at the preset position, when the flexible driving rod abuts against the pressed part, the shearing part overcomes the elastic force of the closing elastic part to be converted into the opening state from the closing state, and when the flexible driving rod is far away from the tong head, the shearing part is in the opening state from the closing state. And the shearing piece recovers to the closed state under the elastic action of the closed elastic piece.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of medical devices, and in particular to a biopsy forceps capable of continuous sampling. Background Art

[0002] Biopsy forceps is a medical tool used to bite and sample the lesion site in the human abdominal cavity. It is generally used in conjunction with an endoscope. During endoscopic examination, when a pathological examination of the lesion site is required, the sampling end of the biopsy forceps is sent into the patient's body through the endoscopic forceps channel to clamp and cut the tissue of the lesion site. The sampling with biopsy forceps has the advantages of less pain and less trauma during the whole process.

[0003] Currently, most biopsy forceps on the market have the following problems during use: each time a sample is taken, the sampling tip must be withdrawn, the sampled tissue removed from the sampling tip, and then re-entered the patient's body for another sample. This process must be repeated several times to obtain a sufficient number of sampled tissues. However, this method slows down the sampling process and can cause the patient to suffer secondary or even multiple painful procedures. Summary of the Invention

[0004] In order to solve the above problems, an embodiment of the present application provides a biopsy forceps capable of continuous sampling, so as to at least partially solve the above problems.

[0005] According to an embodiment of the present application, a biopsy forceps capable of continuous sampling is provided, the biopsy forceps comprising:

[0006] a tube body, comprising a lumen, an opposing operating end, and a sampling end;

[0007] a pulley, rotatably mounted on the sampling end of the tube body about its own axis and at least partially accommodated in the tube cavity;

[0008] a first operating member mounted on the operating end of the tube body;

[0009] a rope, sleeved on the pulley and connected to the first operating member, wherein the first operating member is capable of driving the rope to rotate around the pulley;

[0010] a clamp head, the clamp head being connected to the rope, the clamp heads being multiple in number and distributed at intervals along the extending direction of the rope and connected to the rope, the multiple clamp heads following the movement of the rope to sequentially reach or move away from a preset position relative to the pulley, wherein the clamp head comprises a pressure-bearing member, a shearing member and a closing elastic member, the pressure-bearing member and the shearing member being transmission-connected, the shearing member comprising a first shearing body and a second shearing body rotatably connected about a first axis, the shearing member having a closed state and an open state, the closing elastic member being mounted on the shearing member or the pressure-bearing member to cause the shearing member to tend toward or remain in the closed state; when the clamp head is located at the preset position, the first shearing body and the second shearing body extend out of the lumen to be able to shear a sampling target;

[0011] a second operating member, comprising an operating drive portion and a flexible driving rod, wherein the flexible driving rod is located in the tubular cavity, one end of the flexible driving rod is connected to the operating drive portion, and the other end corresponds to the preset position, and the operating drive portion is mounted on the operating end of the tubular body and can be reciprocated along the axial direction of the tubular body to drive the other end of the flexible driving rod toward or away from the preset position;

[0012] In which, along the axial direction of the pulley, the pliers head and the pulley are spaced apart, and the flexible driving rod and the pliers head are located on the same side of the pulley; under the driving action of the operating drive part, the other end of the flexible driving rod can move away from or press against the pressure piece of the pliers head located at the preset position, when the flexible driving rod presses against the pressure piece, the shearing piece overcomes the elastic force of the closing elastic piece and changes from the closed state to the open state, and when the flexible driving rod moves away from the pliers head, the shearing piece returns to the closed state under the elastic force of the closing elastic piece.

[0013] In an optional embodiment, the pressure-bearing member includes a first rod, a second rod, a third rod, and a fourth rod that are sequentially connected to form a quadrilateral linkage structure, wherein the first end of the first rod and the first end of the second rod are rotationally connected about a first axis, and the first end of the third rod and the first end of the fourth rod are rotationally connected about a second rotation axis; the first end of the third rod and the first end of the fourth rod are respectively connected to a pressure rod, and the first end of the first rod and the first end of the second rod are respectively connected to a transmission rod, and the pressure rod and the transmission rod are both located outside the quadrilateral linkage structure; the first shearing body is connected to one of the transmission rods, and the second shearing body is connected to the other of the transmission rods; when the pliers head is located at the preset position, the other end of the flexible driving rod can extend between the two pressure rods and press at least one of the pressure rods toward the first shearing body or the second shearing body, so that the first shearing body and the second shearing body move away from each other, and the shearing member changes from the closed state to the open state; the closing elastic member is connected between the first shearing body and the second shearing body, or between the two transmission rods.

[0014] In an optional embodiment, the second operating member further includes a cone provided at the other end of the flexible driving rod, the cross section of the cone gradually decreases in the direction toward the pressure rod, and can be inserted into the angle region between the two pressure rods.

[0015] In an optional embodiment, the biopsy forceps further includes a bracket arranged on the rope, one end of the bracket is connected to the rope, and the other end extends out of the pulley along the axial direction of the pulley; there are multiple brackets, and the multiple brackets are spaced apart along the extension direction of the rope, and the multiple forceps heads are connected to the other ends of the multiple brackets one by one, and the first shearing body and the second shearing body are both rotated around the first axis to connect to the other end of the bracket.

[0016] In an optional embodiment, the biopsy forceps further includes a mounting frame, which is located in the tubular cavity and extends along the inner diameter of the tubular body, one end of the mounting frame is connected to the inner wall of the tubular body, and the pulley is rotatably mounted on the other end of the mounting frame; in the axial direction of the pulley, the flexible drive rod and the mounting frame are located on the same side of the pulley, and a first avoidance hole is provided on the mounting frame, and the flexible drive rod passes through the first avoidance hole.

[0017] In an optional embodiment, the other end of the flexible driving rod can move back and forth between an avoidance position and a contact position along the axial direction of the tube body relative to the preset position, and in the avoidance position, the other end of the flexible driving rod is away from the pressure piece of the pliers head located at the preset position, and in the contact position, the other end of the flexible driving rod is in contact with the pressure piece of the pliers head located at the preset position; wherein, the avoidance position and the contact position are both located on the side of the mounting frame away from the operating end of the tube body.

[0018] In an optional embodiment, the biopsy forceps further includes a limit frame, which is located on the side of the mounting frame facing the operating end of the tube body. In the axial direction of the pulley, the limit frame and the mounting frame are located on the same side of the pulley. A second avoidance hole is provided on the limit frame, and the flexible drive rod passes through the second avoidance hole.

[0019] In an optional embodiment, a slide groove extending along the tube body's own axis is provided, and the operating drive part is slidably provided in the slide groove so as to be able to move back and forth between a first position and a second position. When the operating drive part is located at the first position, the other end of the flexible drive rod is away from the pliers head, and when the operating drive part is located at the second position, the other end of the flexible drive rod is pressed against the shearing piece of the pliers head; the second operating part also includes a second elastic reset part, which is located in the slide groove and connected between the operating drive part and the inner wall surface of the slide groove, and is used to drive the operating drive part to remain in the first position.

[0020] In an optional embodiment, the first operating member further includes a driving wheel and a first elastic return member, wherein the driving wheel is rotatably mounted on the operating end of the tube body about its own axis, the axial direction of the driving wheel is the same as the axial direction of the pulley, the rope is a closed loop and is sleeved on the driving wheel and the pulley, the first elastic return member is connected between the driving wheel and the tube body to drive the driving wheel to maintain an initial state, when the driving wheel is in the initial state, the first of the multiple clamp heads is located at the preset position, and the remaining clamp heads are located on the same side of the first clamp head; as the driving wheel starts to rotate in the preset direction based on the initial state, the first clamp head leaves the preset position, and the remaining clamp heads sequentially reach the preset position; the multiple clamp heads are evenly spaced along the extension direction of the rope, the circumference of the driving wheel is the same as the distance between adjacent clamp heads, and the biopsy forceps further include a detection component, which is mounted on the tube body and / or the driving wheel, and is used to detect whether the number of revolutions of the driving wheel in the preset direction based on the initial state is a positive integer.

[0021] In an optional embodiment, the first operating member further includes a locking member, which is mounted on the tube body and can releasably lock the driving wheel. The locking member has a locking position relative to the driving wheel, and when the locking member is in the locking position, it can prevent the driving wheel from rotating in a direction opposite to the preset direction under the action of the first elastic return member.

[0022] The biopsy forceps capable of continuous sampling provided by the present application has a rotatable pulley. Therefore, when using the above-mentioned biopsy forceps, the rope can be easily driven to rotate around the pulley through the first operating member, thereby driving multiple forceps heads to rotate around the pulley, and multiple forceps heads can reach or move away from the preset position in turn. Whenever a pulley reaches the preset position, pressure can be applied to the pressure-bearing member through the second operating member to change the shearing member from a closed state to an open state. At this time, the operator can move the tube body to make the shearing member in the open state approach the sampling target, and then remove the pressure applied to the pressure-bearing member by the second operating member. The closing elastic member drives the shearing member to return to the closed state. During the recovery process, the first shearing body and the second shearing body approach each other. The first shearing body and the second shearing body approaching each other can cut the sampling target, thereby completing the biopsy sampling. Through such a design, in the process of biopsy sampling using the biopsy forceps provided in the present application, it is only necessary to keep the sampling end of the tube body at the sampling position, and there is no need to repeatedly take the sampling end of the tube body out of and put it into the patient's body. By making multiple forceps heads reach the preset position in sequence and driving each forceps head to complete biopsy sampling at the preset position, multiple sampling targets can be obtained, which can greatly improve the sampling efficiency and reduce the patient's discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are only intended to illustrate and explain the present application and do not limit the scope of the present application.

[0024] Figure 1 A schematic diagram of a biopsy forceps capable of continuous sampling provided in an embodiment of the present application from one perspective.

[0025] Figure 2 A schematic diagram from another perspective of a biopsy forceps capable of continuous sampling provided in an embodiment of the present application.

[0026] Figure 3 Based on Figure 2 A top view of the invention, in which some structures are omitted.

[0027] Figure 4 Based on Figure 2 Another top view of , in which some structures are omitted.

[0028] Figure 5 Based on Figure 1A schematic diagram of a biopsy forceps capable of continuous sampling in another state is provided.

[0029] Figure 6 A schematic diagram of a biopsy forceps capable of continuous sampling provided in an embodiment of the present application, with the forceps head in an open state.

[0030] Figure 7 A schematic diagram of a biopsy forceps capable of continuous sampling provided in an embodiment of the present application, with the forceps head in a closed state.

[0031] Description of reference numerals:

[0032] 10-tube body, 11-operating end, 12-sampling end, 13-tube lumen, 14-chute;

[0033] 20-first operating member, 21-driving wheel;

[0034] 31- pulley, 32- rope;

[0035] 40 - clamp head, 41 - pressure member, 411 - first rod, 412 - second rod, 413 - third rod, 414 - fourth rod, 415 - pressure rod, 42 - shearing member, 421 - first shearing member, 422 - second shearing member, 43 - closing elastic member, 44 - transmission rod;

[0036] 50 - second operating member, 51 - operating drive portion, 52 - flexible driving rod, 53 - cone, 54 - second elastic reset member;

[0037] 60-bracket; 70-mounting frame; 80-limiting frame; X-axial direction of the tube body, Y-axial direction of the pulley, Z-preset direction. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present application, the specific implementation methods of the embodiments of the present application are now described with reference to the accompanying drawings.

[0039] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.

[0040] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one or more components with the same structure or function are schematically depicted or labeled.

[0041] The present application provides a biopsy forceps capable of continuous sampling, referring to Figures 1 to 3,as well as Figure 6 and Figure 7 The biopsy forceps includes a tube body 10, a pulley 31, a first operating member 20, a rope 32, a second operating member 50 and a forceps head 40: the tube body 10 includes a lumen 13, an opposite operating end 11 and a sampling end 12;

[0042] A pulley 31 is rotatably mounted on the sampling end 12 of the tubular body 10 about its own axial direction Y and is at least partially accommodated in the tubular lumen 13. A first operating member 20 is mounted on the operating end 11 of the tubular body 10. A rope 32 is sleeved on the pulley 31 and connected to the first operating member 20. The first operating member 20 can drive the rope 32 to rotate about the pulley 31.

[0043] The clamp head 40 is connected to the rope 32. There are multiple clamp heads 40, and the multiple clamp heads 40 are spaced apart along the extension direction of the rope 32. The multiple clamp heads 40 follow the movement of the rope 32 to sequentially reach or move away from the preset position relative to the pulley 31. The clamp head 40 includes a pressure piece 41, a shearing piece 42 and a closing elastic piece 43. The pressure piece 41 and the shearing piece 42 are transmission-connected. The shearing piece 42 includes a first shearing body 421 and a second shearing body 422 that are rotationally connected about a first axis. The shearing piece 42 has a closed state and an open state. The closing elastic piece 43 is installed on the shearing piece 42 or the pressure piece 41 to make the shearing piece 42 tend to or remain in the closed state. When the clamp head 40 is at the preset position, the first shearing body 421 and the second shearing body 422 extend out of the lumen 13 to be able to shear the sampling target.

[0044] The second operating member 50 includes an operating drive portion 51 and a flexible driving rod 52. The flexible driving rod 52 is located in the tubular cavity 13, with one end connected to the operating drive portion 51 and the other end corresponding to a preset position. The operating drive portion 51 is mounted on the operating end 11 of the tubular body 10 and can move back and forth along the axial direction X of the tubular body 10 to drive the other end of the flexible driving rod 52 toward or away from the preset position.

[0045] Among them, along the axial direction Y of the pulley 31, the clamp head 40 and the pulley 31 are spaced apart, and the flexible driving rod 52 and the clamp head 40 are located on the same side of the pulley 31;

[0046] Under the driving action of the operating drive part 51, the other end of the flexible driving rod 52 can move away from or press against the pressure piece 41 of the pliers head 40 located at a preset position. When the flexible driving rod 52 presses against the pressure piece 41, the shearing piece 42 overcomes the elastic force of the closing elastic piece 43 and changes from a closed state to an open state. When the flexible driving rod 52 moves away from the pliers head 40, the shearing piece 42 returns to the closed state under the elastic force of the closing elastic piece 43.

[0047] It can be seen from the above technical solution that since the pulley 31 is rotatable, when using the above-mentioned biopsy forceps, the first operating member 20 can be used to easily drive the rope 32 to rotate around the pulley 31, thereby driving multiple clamp heads 40 to rotate around the pulley 31, and multiple clamp heads 40 can reach or move away from the preset positions in sequence. Whenever the pulley 31 reaches the preset position, the second operating member 50 can apply pressure to the pressure-bearing member 41 to make the shearing member 42 change from the closed state to the open state. At this time, the operator can move the tube body 10 to make the shearing member 42 in the open state approach the sampling target, and then remove the pressure applied to the pressure-bearing member 41 by the second operating member 50. The closing elastic member 43 drives the shearing member 42 to return to the closed state. During the recovery process, the first shearing body 421 and the second shearing body 422 approach each other. The first shearing body 421 and the second shearing body 422 that approach each other can cut the sampling target, thereby completing the biopsy sampling. Through such a design, in the process of performing biopsy sampling using the biopsy forceps provided in the present application, it is only necessary to keep the sampling end 12 of the tube body 10 at the sampling position, and there is no need to repeatedly take the sampling end 12 of the tube body 10 out of and put into the patient's body. By making multiple forceps heads 40 reach the preset position in sequence and driving each forceps head 40 to complete biopsy sampling at the preset position, multiple sampling targets can be obtained, which can greatly improve the sampling efficiency and reduce the patient's discomfort.

[0048] For the convenience of description, the orientation words or direction words in this application are described based on the tube body 10 being in a natural hanging state. For example, the axial direction X of the tube body 10 refers to the extension direction of the tube body 10 when the tube body 10 is in a natural hanging state.

[0049] As the pliers 40 rotates around the pulley 31 following the rope 32, the position of the pliers 40 relative to the rotation axis of the pulley 31 along the axial direction X of the tube 10 continuously changes. The preset position may be a certain position of the connection between the pliers 40 and the rope 32 along the axial direction X of the tube 10 relative to the rotation axis of the pulley 31. Regarding the first and second shearing members 421 and 422 extending outside the lumen 13 to shear the sample target when the clamp head 40 is in the preset position, those skilled in the art will understand that when the clamp head 40 is in the preset position, the first and second shearing members 421 and 422 can extend out of the lumen 13 through the orifice of the sampling end 12 of the tubular body 10, thereby contacting the sample target and shearing the sample target from the patient's body tissue. Furthermore, when the clamp head 40 reaches the preset position, the pressure member 41 and the other end of the flexible drive rod 52 correspond in the axial direction X of the tubular body 10. In other words, the orthographic projection of the pressure member 41 of the clamp head 40 on a virtual plane perpendicular to the axial direction X of the tubular body 10 and the orthographic projection of the other end of the flexible drive rod 52 on the virtual plane at least partially overlap. In one example, the clamp head 40 reaching the preset position requires that the connection between the clamp head 40 and the rope 32 is located outside the lumen 13. In one example, the connection between the clamp head 40 and the rope 32 is located outside the lumen 13, and the distance between the connection between the clamp head 40 and the rope 32 and the axis of the pulley 31 along the axial direction X is the largest, and the clamp head 40 reaches the preset position. Figure 1 When the pliers head 40 is located at the lowermost end relative to the pulley 31 in the up and down direction shown in the figure, the pliers head 40 reaches the preset position.

[0050] Those skilled in the art will appreciate that the tube body 10 should be flexible so as to be able to adapt to the conditions in the patient's body through appropriate bending.

[0051] Those skilled in the art will appreciate that by distributing the pliers 40 and the pulley 31 at intervals along the axial direction Y of the pulley 31, and distributing the flexible drive rod 52 and the plurality of pliers 40 on the same side of the pulley 31 in the axial direction Y of the pulley 31, the pliers 40 and the rope 32 can be distributed at intervals along the axial direction Y of the pulley 31, and the flexible drive rod 52 and the rope 32 can be distributed at intervals along the axial direction Y of the pulley 31. In the process of the rope 32 driving the pliers 40 to move around the pulley 31, the pulley 31 will not interfere with the pliers 40, and the pulley 31 and the rope 32 will not interfere with the flexible drive rod 52. The flexible drive rod 52 can smoothly reciprocate along the axial direction X of the tube body 10 to approach or move away from the pliers 40 at the preset position, so that the other end of the flexible drive rod 52 can move to one side of the pulley 31, thereby contacting or moving away from the pliers 40 at the preset position.

[0052] In one example, the extending direction of the first axis is the same as the axial direction Y of the pulley 31 .

[0053] In one example, the pulley 31 may include an annular groove provided on its outer annular surface, and the rope 32 is sleeved on the annular groove. The annular groove can limit the rope 32 to prevent the rope 32 from deviating or slipping on the pulley 31, ensuring that the rope 32 can stably rotate around the pulley 31, thereby ensuring the stable movement of the forceps head 40 and the sampling effect. In addition, the design of the annular groove can also increase the contact area between the rope 32 and the pulley 31, improve the friction, and make the first operating member 20 more labor-saving and stable when driving the rope 32. In order to further optimize the structure and performance of the biopsy forceps, the outer surface of the pulley 31 can also be treated with anti-slip treatment, such as providing anti-slip texture or coating, to enhance the friction between the rope 32 and the pulley 31 and prevent the rope 32 from slipping during the driving process. Such a design can ensure that the biopsy forceps have higher reliability and stability during use.

[0054] Those skilled in the art will appreciate that the first shearing member 421 may include a first groove and a first cutting edge located at the edge of the first groove. The first cutting edge is relatively sharp, for example, like the blade of a pair of scissors. The second shearing member 422 may include a second groove and a second cutting edge located at the edge of the second groove. The second cutting edge is relatively sharp, for example, like the blade of a pair of scissors. The first shearing member 421 and the second shearing member 422 are adapted to each other, and the first and second shearing members 421 and 422, which are connected by rotation about a first axis, can move toward and away from each other. The process of the first and second shearing members 421 and 422 moving toward each other is equivalent to the process of the first and second grooves interlocking with each other. During this process, the first and second cutting edges gradually move toward each other, thereby achieving a shearing effect. When the forceps head 40 is closed, the first and second cutting edges cooperate to shear the sample object from the patient's body, and the sheared sample object can be accommodated in the first and / or second grooves. The first cutting edge can be disposed along the edge of the first groove, and the second cutting edge can be disposed along the edge of the second groove. Among them, when the first shearing body 421 and the second shearing body 422 approach each other to meet certain conditions, for example, when the angle between the two is less than a certain threshold, the pliers head 40 enters a closed state; conversely, when the first shearing body 421 and the second shearing body 422 move away from each other to meet certain conditions, for example, when the angle between the two is greater than another threshold, the pliers head 40 enters an open state.

[0055] Furthermore, biopsy forceps are generally used in conjunction with an endoscope. Therefore, when designing the biopsy forceps, considerations must be given to how to conveniently insert the forceps into the patient's body and how to accurately operate the forceps within the endoscope's field of view. To achieve this, a connection portion compatible with the endoscope's forceps channel can be provided at the operating end 11 of the tube body 10, allowing the biopsy forceps to be stably connected to the endoscope and inserted into the patient's body through the endoscope's forceps channel. Furthermore, guide structures or markings can be provided on the connection portion to help the operator accurately identify the position and orientation of the biopsy forceps within the endoscope's field of view, thereby enabling precise control of the biopsy forceps.

[0056] In one possible implementation, refer to Figure 6 and Figure 7 The pressure member 41 includes a first rod body 411, a second rod body 412, a third rod body 413 and a fourth rod body 414 which are connected in sequence to form a quadrilateral connecting rod structure. The first end of the first rod body 411 and the first end of the second rod body 412 are connected to rotate around the first axis, and the first end of the third rod body 413 and the first end of the fourth rod body 414 are connected to rotate around the second rotation axis; the first end of the third rod body 413 and the first end of the fourth rod body 414 are respectively connected to a pressure rod 415, and the first end of the first rod body 411 and the first end of the second rod body 412 are respectively connected to a transmission rod 44, and the pressure rod 415 and the transmission rod 44 They are all located on the outside of the quadrilateral connecting rod structure; the first shearing body 421 is connected to a transmission rod 44, and the second shearing body 422 is connected to another transmission rod 44; when the pliers head 40 is located at the preset position, the other end of the flexible driving rod 52 can extend between the two compression rods 415 and press at least one compression rod 415 toward the first shearing body 421 or the second shearing body 422, so that the first shearing body 421 and the second shearing body 422 move away from each other, and the shearing piece 42 changes from a closed state to an open state; the closing elastic piece 43 is connected between the first shearing body 421 and the second shearing body 422, or between the two transmission rods 44.

[0057] Based on the above technical solution, in a quadrilateral linkage structure, the first rod 411, the second rod 412, the third rod 413, and the fourth rod 414 are sequentially connected and rotatably connected, forming a stable linkage mechanism. This design ensures that the pliers 40 maintains good stability and reliability in both the open and closed positions. When the other end of the flexible drive rod 52 extends between the two compression rods 415 and presses against at least one of the compression rods 415 toward the first shearing member 421, the transmission action of the transmission rod 44 causes the first and second shearing members 421 and 422 to move away from each other, thereby achieving the open position of the pliers 40. At this point, the operator can move the tube 10 to bring the open pliers 40 closer to the sampling target. When the flexible drive rod 52 removes its force on the pliers 40, the closing elastic member 43 activates, causing the first and second shearing members 421 and 422 to move closer together under the action of the elastic force, thereby returning to the closed position. During the recovery process, the blades of the first shearing body 421 and the second shearing body 422 shear against each other to cut off the sample target.

[0058] Furthermore, to further enhance the sampling efficiency and accuracy of the biopsy forceps, auxiliary structures may be provided on the forceps head 40. For example, the cutting portion of the forceps head 40 may be provided with small protrusions or grooves to increase the contact area and friction with the sampled object, thereby facilitating shearing of the sampled object. Furthermore, markings or scales may be provided on the forceps head 40 to allow the operator to more accurately determine the position of the forceps head 40 and the sampling depth, thereby enhancing the accuracy and reliability of sampling.

[0059] Obviously, when the pliers head 40 is transformed from the closed state to the open state, the angle between the two pressure rods 415 gradually increases. The other end of the flexible driving rod 52 is inserted between the two pressure rods 415 and presses the pressure rod 415 toward the first shearing body 421, thereby transforming the pliers head 40 into the open state. Based on this situation, in order to enable the pliers head 40 to reliably transform into the open state under the pressure of the flexible driving rod 52, in one embodiment of the present application, the second operating member 50 further includes a cone 53 provided at the other end of the flexible driving rod 52. The cross section of the cone 53 gradually decreases in the direction toward the pressure rod 415 and is capable of being inserted into the angle region between the two pressure rods 415. Based on this solution, since the first end of the third rod 413 and the first end of the fourth rod 414 are rotationally connected about the second rotational axis, the two compression rods 415 connected to the first ends of the third rod 413 and the fourth rod 414, respectively, are also rotationally connected. Therefore, a variable angle exists between the two compression rods 415. Furthermore, when the pliers head 40 is in the closed state, the angle between the two compression rods 415 is at its minimum. Therefore, the provision of a tapered cone 53 with a gradually decreasing cross-section facilitates insertion into the angle region between the two compression rods 415 in the closed state. As the shearing member 42 transitions toward the open state, the angle between the two compression rods 415 gradually increases. Therefore, the provision of the tapered cone 53 ensures that the cone 53 reliably presses against the compression rods 415, thereby reliably transmitting the pressing force of the flexible drive rod 52, thereby reliably separating the first shearing member 421 and the second shearing member 422 and transitioning to the open state. Among them, the size of the cone 53 can be set according to the angle range between the two pressure rods 415 to ensure that the cone 53 can be easily inserted between the two pressure rods 415 when the pliers head 40 is in a closed state, and can still be reliably pressed against at least one pressure rod 415 when the pliers head 40 is in an open state, so that the pliers head 40 can be reliably maintained in the open state.

[0060] In one possible implementation, refer to Figure 2 and Figure 4The biopsy forceps also includes a bracket 60 mounted on the cable 32. One end of the bracket 60 is connected to the cable 32, and the other end extends out of the pulley 31 along the axial direction Y of the pulley 31. There are multiple brackets 60, and the brackets 60 are spaced apart along the extension direction of the cable 32. The multiple clamp heads 40 are connected to the other ends of the brackets 60 in a one-to-one correspondence. The first shearing body 421 and the second shearing body 422 are both rotatably connected to the other ends of the brackets 60 about a first axis. With this design, the other end of the bracket 60 extends out of the pulley 31 and the cable 32. Each clamp head 40 is mounted on the other end of the corresponding bracket 60, thereby ensuring that the clamp heads 40, the pulley 31, and the cable 32 are spaced apart along the axial direction Y of the pulley 31. Furthermore, by rotatably connecting the first shearing member 421 and the second shearing member 422 to the other end of the bracket 60 about the first axis, the forceps head 40 can be rotatably connected to the bracket 60 about the first axis. This can reduce the space occupied by the forceps head 40 within the lumen 13, thereby reducing the inner and outer diameters of the tubular body 10. Those skilled in the art will appreciate that, as a component to be inserted into a patient's body, a smaller outer diameter of the tubular body 10 is more conducive to reducing the patient's discomfort.

[0061] In one possible implementation, refer to Figure 2 and Figure 3 The biopsy forceps also includes a mounting bracket 70, which is located in the lumen 13 and extends along the inner diameter of the tubular body 10. One end of the mounting bracket 70 is connected to the inner wall of the tubular body 10, and the pulley 31 is rotatably mounted on the other end of the mounting bracket 70. In the axial direction Y of the pulley 31, the flexible drive rod 52 and the mounting bracket 70 are located on the same side of the pulley 31. The mounting bracket 70 is provided with a first avoidance hole, through which the flexible drive rod 52 passes. By allowing the flexible drive rod 52 to pass through the first avoidance hole of the mounting bracket 70, the mounting bracket 70 can limit the other end of the flexible drive rod 52, ensuring that the other end of the flexible drive rod 52 is aligned with the pressure member 41 of the forceps head 40 at a preset position.

[0062] Furthermore, since the operating drive part 51 can drive the other end of the flexible driving rod 52 to approach or move away from the preset position; therefore, in one embodiment, the other end of the flexible driving rod 52 can move back and forth between the avoidance position and the contact position along the axial direction Y of the tube body 10 relative to the preset position. When in the avoidance position, the other end of the flexible driving rod 52 is away from the pressure piece 41 of the pliers head 40 located at the preset position, and when in the contact position, the other end of the flexible driving rod 52 is in contact with the pressure piece 41 of the pliers head 40 located at the preset position; wherein the avoidance position and the contact position are both located on the side of the mounting bracket 70 away from the operating end 11 of the tube body 10, so as to ensure that the flexible driving rod 52 is always limited by the first avoidance hole of the mounting bracket 70.

[0063] In one possible implementation, refer to Figure 2 The biopsy forceps also includes a limiting frame 80, which is located on the side of the mounting frame 70 facing the operating end 11 of the tube body 10. In the axial direction Y of the pulley 31, the limiting frame 80 and the mounting frame 70 are located on the same side of the pulley 31. A second avoidance hole is provided on the limiting frame 80, and the flexible drive rod 52 passes through the second avoidance hole. In this way, the flexible drive rod 52 can also be limited by the second avoidance hole of the limiting frame 80, so that the flexible drive rod 52 can reliably transmit pressure between the operating drive part 51 and the forceps head 40. The first avoidance hole and the second avoidance hole are spaced apart along the axial direction X of the tube body 10. The number of limiting frames 80 can be set according to the distance between the operating drive part 51 and the mounting frame 70 along the axial direction X of the tube body 10. For example, when the distance between the operating drive part 51 and the mounting frame 70 along the axial direction X of the tube body 10 is large, the number of limit frames 80 can be large, and multiple limit frames 80 are distributed at intervals along the axial direction X of the tube body 10. This not only can reliably limit the flexible drive rod 52, but also will not affect the bending of the tube body 10.

[0064] In one possible implementation, refer to Figure 2 The tube body 10 is provided with a slide groove 14 extending along its own axial direction, and the operating drive part 51 is slidably provided in the slide groove 14 so as to be able to move back and forth between the first position and the second position. When the operating drive part 51 is in the first position, the other end of the flexible drive rod 52 is away from the pliers head 40, and when the operating drive part 51 is in the second position, the other end of the flexible drive rod 52 is pressed against the shearing piece 42 of the pliers head 40; the second operating member 50 also includes a second elastic reset member 54, which is located in the slide groove 14 and connected between the operating drive part 51 and the inner wall surface of the slide groove 14, for driving the operating drive part 51 to remain in the first position. With this design, when no external force is applied to the operating drive unit 51, the operating drive unit 51 can be maintained in the first position under the action of the second elastic reset member 54, so that the other end of the flexible drive rod 52 is away from the clamp head 40, that is, the other end of the flexible drive rod 52 is in the avoidance position; when an external force is applied to move the operating drive unit 51 to the second position, the other end of the flexible drive rod 52 can be pressed against the shearing member 42 of the clamp head 40, that is, the other end of the flexible drive rod 52 is in the contact position, thereby allowing the shearing member 42 to be transformed into an open state. In one example, the second elastic reset member 54 can be a coil spring extending along the axial direction X of the tube body 10, one end of which is connected to the operating drive unit 51, and the other end is connected to the inner wall surface of the chute 14 near the sampling end 12 of the tube body 10.

[0065] In one possible implementation, refer to Figure 1 and Figure 2The first operating member 20 also includes a driving wheel 21 and a first elastic reset member. The driving wheel 21 is rotatably mounted on the operating end 11 of the tube body 10 around its own axis. The axial direction of the driving wheel 21 is the same as the axial direction of the pulley 31. The rope 32 is a closed loop and is sleeved on the driving wheel 21 and the pulley 31. The first elastic reset member is connected between the driving wheel 21 and the tube body 10 to drive the driving wheel 21 to remain in the initial state. When the driving wheel 21 is in the initial state, the first clamp head 40 of the multiple clamp heads 40 is located at a preset position, and the remaining clamp heads 40 are located at the first clamp head. The same side of the head 40; as the driving wheel 21 starts to rotate in the preset direction Z based on the initial state, the first clamp head 40 leaves the preset position, and the remaining clamp heads 40 arrive at the preset position in sequence; multiple clamp heads 40 are evenly spaced along the extension direction of the rope 32, and the circumference of the driving wheel 21 is the same as the distance between adjacent clamp heads 40. The biopsy forceps also includes a detection component, which is installed on the tube body 10 and / or the driving wheel 21. The detection component is used to detect whether the number of turns of the driving wheel 21 starting from the initial state along the preset direction Z is a positive integer. The rotation of the driving wheel 21 can be manual or motor-driven, which is not limited in this application. The first elastic reset member and the detection component are not shown in the figure.

[0066] It should be understood that since the multiple clamp heads 40 are distributed at intervals along the extension direction of the rope 32, they can be sorted along the extension direction of the rope. As for the sorting direction, it can be in the clockwise direction of the pulley or in the counterclockwise direction of the pulley. This is not limited in this application. In this way, the multiple clamp heads 40 can be divided into the first clamp head 40 and the remaining clamp heads 40. The first clamp head 40 and the remaining clamp heads 40 are combined together to form multiple clamp heads 40 on the rope 32.

[0067] It can be seen from this technical solution that since the circumference of the driving wheel 21 is the same as the distance between adjacent pliers 40, the pliers 40 at the preset position can be replaced once for every rotation of the driving wheel 21 from the initial state. In this case, the number of rotations of the driving wheel 21 can be detected by the detection component to determine whether there is a pliers 40 at the preset position. For example, if the driving wheel 21 rotates exactly one circle along the preset direction from the initial state, the pliers 40 at the preset position is replaced by the first pliers 40 to the second pliers 40; if it rotates exactly two circles, the pliers 40 at the preset position is replaced by the first pliers 40 to the third pliers 40. The operator of the biopsy forceps can determine whether the driving wheel 21 has rotated a positive integer number of circles starting from the preset direction through the detection component, so that the number of rotations of the driving wheel 21 can be obtained by accumulation, which is used to determine whether the current pliers 40 at the preset position is the last pliers 40. Among them, the number of pliers 40 on the rope 32 can be set as needed, and this application does not limit it. For example, Figure 1It shows a situation in which, in an initial state, the first clamp head 40 is located at a preset position and in a closed state, and the remaining clamp heads 40 are located on the same side of the first clamp head 40 . Figure 5 It shows a situation where three clamp heads 40 are provided on the rope 32 , the first clamp head 40 leaves the preset position, the second clamp head 40 is in the preset position, and is pressed by the flexible driving rod 52 and is in an open state.

[0068] Among them, the detection component can have various structural forms. For example, a sensor can be set to detect the rotation of the drive wheel 21. The sensor can be installed on the drive wheel 21 or the tube body 10 to detect the rotation angle or number of rotations of the drive wheel 21. When the drive wheel 21 starts to rotate, the sensor will capture this action and convert it into an electrical signal for transmission and processing. By calculating and analyzing these signals, we can accurately know the rotation of the drive wheel 21, so as to determine whether the pliers head 40 at the preset position has been replaced. For another example, the detection component can include a pointer and an identification member. The pointer is set at the edge of the drive wheel 21, and the identification member is set on the tube body 10. Whenever the pointer follows the drive wheel 21 to rotate to point to the identification member, the drive wheel 21 rotates a new circle.

[0069] Furthermore, the first operating member 20 also includes a locking member, which is mounted on the tubular body 10 and is capable of releasably locking the drive wheel 21. The locking member has a locking position relative to the drive wheel 21. When in the locked position, the locking member can prevent the drive wheel 21 from rotating in a direction opposite to the preset direction under the action of the first elastic return member. Based on this technical solution, when it is determined that the number of rotations of the drive wheel 21 is a positive integer and the new pliers head 40 has reached the preset position, the locking member can be used to lock the drive wheel 21. Therefore, when the operator does not intervene in the drive wheel 21, the drive wheel 21 is prevented from being driven by the first elastic return member and rotating in a direction opposite to the preset direction, thereby maintaining the drive wheel 21 in its current state and ensuring that the current pliers head 40 remains stably in the preset position. This allows the operator to have both hands free to perform other operations, such as operating the second operating member 50 to press the flexible drive rod 52 against the pliers head 40 in the preset position, thereby converting the shearing member 42 into an open state. The locking member is not shown in the figure.

[0070] The locking member can be in various forms. For example, the locking member can be a slidable locking block with a locking groove. When the locking block slides to the locked position, the locking groove can engage the edge of the drive wheel 21, thereby preventing the drive wheel 21 from rotating. At this time, the operator can release the operation of the drive wheel 21 and shift his attention to the second operating member 50. By operating the second operating member 50, the flexible drive rod 52 is pressed against the pliers head 40 in the preset position to open the pliers head 40. When the pliers head 40 needs to be replaced, the operator only needs to slide the locking block to disengage the locking groove from the drive wheel 21, then rotate the drive wheel 21 until the new pliers head 40 reaches the preset position, and then use the locking block to lock the drive wheel 21 again. This design not only improves the convenience of operation of the biopsy forceps, but also ensures the stability and accuracy of the pliers head 40 during the sampling process. For another example, the locking member may be a slidable latch that is slidably disposed on the driving wheel 21 . A slot may be disposed on the tubular body 10 . When the latch is inserted into the slot, the driving wheel 21 is prevented from rotating.

[0071] In addition, in this application, it is assumed that when the shearing piece 42 is in the open state, the pliers head 40 is in the open state; when the shearing piece 42 is in the closed state, the pliers head 40 is in the closed state.

[0072] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0073] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications, and combinations made by any person skilled in the art without departing from the concept and principle of the present invention should fall within the scope of protection of the present invention.

Claims

1. A biopsy forceps capable of continuous sampling, characterized in that: The biopsy forceps comprises: A tubular body (10) comprising a tubular lumen (13), an opposing operating end (11) and a sampling end (12); a pulley (31) rotatably mounted on the sampling end (12) of the tube body (10) about its own axis and at least partially accommodated in the tube cavity (13); A first operating member (20) is mounted on the operating end (11) of the tube body (10); a rope (32) sleeved on the pulley (31) and connected to the first operating member (20), wherein the first operating member (20) is capable of driving the rope (32) to rotate around the pulley (31); A clamp head (40), the clamp head (40) is connected to the rope (32), the number of the clamp heads (40) is multiple, and the clamp heads (40) are spaced apart along the extension direction of the rope (32), and the multiple clamp heads (40) follow the movement of the rope (32) to sequentially reach or move away from a preset position relative to the pulley (31), wherein the clamp head (40) includes a pressure piece (41), a shearing piece (42) and a closing elastic piece (43), the pressure piece (41) and the shearing piece (42) are transmission-connected, and the shearing piece (42) ) comprises a first shearing body (421) and a second shearing body (422) connected to each other by rotation around a first axis, the shearing member (42) having a closed state and an open state, the closing elastic member (43) being installed on the shearing member (42) or the pressure member (41) so as to make the shearing member (42) tend to or remain in the closed state; when the clamp head (40) is located at the preset position, the first shearing body (421) and the second shearing body (422) extend out of the lumen (13) to be able to shear the sampling target; a second operating member (50) comprising an operating drive portion (51) and a flexible driving rod (52), wherein the flexible driving rod (52) is located in the tubular cavity (13), one end of the flexible driving rod (52) is connected to the operating drive portion (51), and the other end corresponds to the preset position, and the operating drive portion (51) is mounted on the operating end (11) of the tubular body (10) so as to be reciprocatingly movable along the axial direction (X) of the tubular body (10) to drive the other end of the flexible driving rod (52) to approach or move away from the preset position; Wherein, along the axial direction (Y) of the pulley (31), the pliers head (40) and the pulley (31) are spaced apart, and the flexible driving rod (52) and the pliers head (40) are located on the same side of the pulley (31); Under the driving action of the operating drive portion (51), the other end of the flexible driving rod (52) can move away from or press against the pressure piece (41) of the pliers head (40) located at the preset position. When the flexible driving rod (52) presses against the pressure piece (41), the shearing piece (42) overcomes the elastic force of the closing elastic piece (43) and changes from the closed state to the open state. When the flexible driving rod (52) moves away from the pliers head (40), the shearing piece (42) returns to the closed state under the elastic force of the closing elastic piece (43).

2. The biopsy forceps capable of continuous sampling according to claim 1, characterized in that: The pressure-bearing member (41) comprises a first rod (411), a second rod (412), a third rod (413) and a fourth rod (414) which are rotatably connected in sequence to form a quadrilateral connecting rod structure, wherein the first end of the first rod (411) and the first end of the second rod (412) are rotatably connected around a first axis, and the first end of the third rod (413) and the first end of the fourth rod (414) are rotatably connected around a second rotation axis; The first end of the third rod body (413) and the first end of the fourth rod body (414) are further connected to a compression rod (415) respectively, and the first end of the first rod body (411) and the first end of the second rod body (412) are further connected to a transmission rod (44) respectively, and the compression rod (415) and the transmission rod (44) are both located outside the quadrilateral connecting rod structure; The first shearing body (421) is connected to one of the transmission rods (44), and the second shearing body (422) is connected to the other of the transmission rods (44); when the pliers head (40) is located at the preset position, the other end of the flexible driving rod (52) can extend between the two pressure rods (415) and press at least one of the pressure rods (415) toward the first shearing body (421) or the second shearing body (422), so that the first shearing body (421) and the second shearing body (422) move away from each other, and the shearing member (42) changes from the closed state to the open state; The closing elastic member (43) is connected between the first shearing body (421) and the second shearing body (422), or is connected between the two transmission rods (44).

3. The biopsy forceps capable of continuous sampling according to claim 2, characterized in that: The second operating member (50) further includes a cone (53) arranged at the other end of the flexible driving rod (52), the cross section of the cone (53) gradually decreasing in the direction toward the pressure rod (415), and capable of being inserted into the angle region between the two pressure rods (415).

4. The biopsy forceps capable of continuous sampling according to claim 1, characterized in that: The biopsy forceps further comprises a bracket (60) arranged on the rope (32), one end of the bracket (60) is connected to the rope (32), and the other end thereof extends out of the pulley (31) along the axial direction (Y) of the pulley (31); There are a plurality of brackets (60), and the brackets (60) are spaced apart along the extension direction of the rope (32). The pliers (40) are connected to the other ends of the brackets (60) in a one-to-one correspondence. The first shearing body (421) and the second shearing body (422) are both connected to the other ends of the brackets (60) by rotating around the first axis.

5. The biopsy forceps capable of continuous sampling according to claim 1, characterized in that: The biopsy forceps further includes a mounting frame (70), the mounting frame (70) being located in the lumen (13) and extending along the inner diameter of the tube body (10), one end of the mounting frame (70) being connected to the inner wall of the tube body (10), and the pulley (31) being rotatably mounted on the other end of the mounting frame (70); In the axial direction (Y) of the pulley (31), the flexible driving rod (52) and the mounting frame (70) are located on the same side of the pulley (31), and a first avoidance hole is provided on the mounting frame (70), and the flexible driving rod (52) passes through the first avoidance hole.

6. The biopsy forceps capable of continuous sampling according to claim 5, characterized in that: The other end of the flexible driving rod (52) can move back and forth between an avoidance position and a contact position along the axial direction (Y) of the tube body (10) relative to the preset position. In the avoidance position, the other end of the flexible driving rod (52) is away from the pressure-bearing part (41) of the clamp head (40) located at the preset position. In the contact position, the other end of the flexible driving rod (52) is in contact with the pressure-bearing part (41) of the clamp head (40) located at the preset position. The avoidance position and the contact position are both located on the side of the mounting frame (70) that is away from the operating end (11) of the tube body (10).

7. The biopsy forceps capable of continuous sampling according to claim 5, characterized in that: The biopsy forceps further includes a limiting frame (80), which is located on the side of the mounting frame (70) facing the operating end (11) of the tube body (10). In the axial direction (Y) of the pulley (31), the limiting frame (80) and the mounting frame (70) are located on the same side of the pulley (31). A second avoidance hole is provided on the limiting frame (80), and the flexible driving rod (52) passes through the second avoidance hole.

8. The biopsy forceps capable of continuous sampling according to claim 1, characterized in that: The tube body (10) is provided with a slide groove (14) extending along its own axial direction, and the operating drive part (51) is slidably arranged in the slide groove (14) so as to be able to reciprocate between a first position and a second position. When the operating drive part (51) is located at the first position, the other end of the flexible drive rod (52) is away from the clamp head (40); when the operating drive part (51) is located at the second position, the other end of the flexible drive rod (52) is pressed against the shearing piece (42) of the clamp head (40); The second operating member (50) further includes a second elastic reset member (54), which is located in the slide groove (14) and connected between the operating drive portion (51) and the inner wall surface of the slide groove (14), and is used to drive the operating drive portion (51) to remain in the first position.

9. The biopsy forceps capable of continuous sampling according to claim 1, characterized in that: The first operating member (20) further comprises a driving wheel (21) and a first elastic reset member, wherein the driving wheel (21) is rotatably mounted on the operating end (11) of the tube body (10) about its own axis, the axial direction of the driving wheel (21) is the same as the axial direction of the pulley (31), the rope (32) is a closed loop and is sleeved on the driving wheel (21) and the pulley (31), the first elastic reset member is connected between the driving wheel (21) and the tube body (10) to drive the driving wheel (21) to remain in an initial state, and when the driving wheel (21) is in the initial state, the first of the plurality of pliers (40) is located at the preset position, and the remaining pliers (40) are located on the same side of the first pliers (40); As the driving wheel (21) starts to rotate in the preset direction (Z) based on the initial state, the first clamp head (40) leaves the preset position, and the remaining clamp heads (40) arrive at the preset position in sequence; the plurality of clamp heads (40) are evenly spaced along the extension direction of the rope (32), the circumference of the driving wheel (21) and the distance between adjacent clamp heads (40) are the same, and the biopsy forceps further include a detection component, which is installed on the tube body (10) and / or the driving wheel (21), and the detection component is used to detect whether the number of revolutions of the driving wheel (21) starting to rotate in the preset direction based on the initial state is a positive integer.

10. The biopsy forceps capable of continuous sampling according to claim 9, characterized in that: The first operating member (20) further includes a locking member, which is mounted on the tube body (10) and can releasably lock the driving wheel (21). The locking member has a locking position relative to the driving wheel (21). When the locking member is in the locking position, the driving wheel (21) can be prevented from rotating in a direction opposite to a preset direction under the action of the first elastic return member.

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