Biopsy forceps

Abstract

The biopsy forceps comprise a forceps head assembly, a handle assembly, a steering inhaul cable and a bendable sleeve, one end of the sleeve is connected with the forceps head assembly, and the other end of the sleeve is connected with the handle assembly; one end of the steering inhaul cable is connected with the tong head assembly, and the other end of the steering inhaul cable can move relative to the handle assembly, so that the sleeve is driven to be bent when the tong head assembly is pulled, and the tong head assembly is bent relative to the handle assembly. When the biopsy forceps are used for an operation, the biopsy forceps can enable the forceps head assembly to steer under the driving of an endoscope and can also steer under the pulling of the steering inhaul cable of the biopsy forceps, and the biopsy forceps are flexible and convenient to operate, higher in reliability and convenient to implement the operation.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, and in particular to a biopsy forceps. Background Art

[0002] Biopsy forceps are indispensable tools for obtaining pathological specimens during endoscopic examination. They are used for sampling living tissue from the digestive tract, respiratory tract, etc., or for clamping and removing foreign bodies under endoscopy.

[0003] Research has shown that existing biopsy forceps have the following shortcomings:

[0004] The head of the biopsy forceps is turned by the bending of the endoscope, which makes the biopsy forceps inconvenient to use. Utility Model Content

[0005] The purpose of the utility model is to provide a biopsy forceps, which can improve the convenience and reliability of the biopsy forceps.

[0006] The embodiment of the present utility model is achieved as follows:

[0007] This embodiment provides a biopsy forceps, comprising:

[0008] A pliers head assembly, a handle assembly, a steering cable and a flexible sleeve, one end of the sleeve is connected to the pliers head assembly, and the other end of the sleeve is connected to the handle assembly; one end of the steering cable is connected to the pliers head assembly, and the other end of the steering cable can move relative to the handle assembly, thereby driving the sleeve to bend when the pliers head assembly is pulled, so that the pliers head assembly bends relative to the handle assembly.

[0009] In an optional embodiment, the clamp head assembly includes a clamp frame and two clamp arms, both clamp arms are rotatably connected to the clamp frame, one end of the steering cable is fixedly connected to the clamp frame; one end of the sleeve is connected to the clamp frame.

[0010] In an optional embodiment, the clamp frame has a sleeve portion, the sleeve portion is plug-fitted with the sleeve, the steering cable is connected to the sleeve portion, and the connection position of the steering cable and the sleeve portion is spaced from the axis of the sleeve portion.

[0011] In an optional embodiment, one end of the steering cable connected to the clamp head assembly passes through the wall of the casing.

[0012] In an optional embodiment, the sleeve includes a bendable pipe section and a straight pipe section, one end of the bendable pipe section is connected to the straight pipe section, the straight pipe section is connected to the handle assembly, the pipe wall of the straight pipe section is provided with a through hole, part of the steering cable is passed through the straight pipe section, and the steering cable passes through the through hole and is connected to the clamp head assembly.

[0013] In an optional embodiment, the bendable tube section is configured as a spring tube.

[0014] In an optional embodiment, the biopsy forceps further includes a drive block, which is slidably engaged with the handle assembly, and an end of the steering cable away from the forceps head assembly is connected to the drive block.

[0015] In an optional embodiment, the handle assembly includes a core rod and a sliding sleeve that slide together in a preset direction, the sleeve is connected to the core rod, and the drive block slides together with the core rod in the preset direction.

[0016] In an optional embodiment, the biopsy forceps further includes a locking mechanism, which is used to limit the relative sliding of the drive block and the core rod, so that when the drive block slides to a preset position, the drive block and the core rod are kept relatively fixed in a preset direction.

[0017] In an optional embodiment, the handle assembly further includes a rotating member, and the rotating member and the core rod are rotatably engaged around the axis of the core rod.

[0018] The beneficial effects of the embodiments of the present utility model are:

[0019] In summary, this embodiment provides a biopsy forceps with a head assembly and a handle assembly equipped with a steering cable. The steering cable can control the bending of the head assembly, making the biopsy forceps more convenient to operate. When the biopsy forceps is used in conjunction with an endoscope, the distal end of the endoscope can rotate under its own structure, and the cannula of the biopsy forceps is passively bent by the curvature of the endoscope lumen, thereby driving the head assembly extending from the endoscope to turn, thereby facilitating the execution of the surgery. Furthermore, during surgery, when the curvature of the endoscope lumen cannot meet the steering requirements of the head assembly, or when the steering requirements of the endoscope lumen alone are insufficient, the steering cable can be used to bend the cannula to a certain angle even without the need for the endoscope to drive the steering cable. This allows the cannula to drive the head assembly to turn, allowing the head assembly to directly view the tissue to be sampled, thereby improving the reliability of the surgery. When using the biopsy forceps for surgery, the biopsy forceps can not only steer the head assembly under the drive of the endoscope, but can also steer under the pull of the steering cable itself. This makes the biopsy forceps flexible and convenient to operate, with higher reliability and facilitates the execution of the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of a biopsy forceps according to an embodiment of the present utility model;

[0022] Figure 2This is a schematic diagram of the exploded structure of the biopsy forceps according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the exploded structure of the clamp head assembly according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic structural diagram of a sleeve according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the exploded structure of the rotating member and the driving block according to an embodiment of the present utility model.

[0026] icon:

[0027] 1-Biopsy forceps; 10-Forceps head assembly; 100-Forceps frame; 101-Socket connection part; 102-Rotating shaft; 103-Clamping arm; 1031-Mounting hole; 110-Forceps arm; 111-Rotating hole; 120-Connecting rod; 20-Handle assembly; 200-Core rod; 201-First hand ring; 202-Slide groove; 210-Slide sleeve; 211-Second hand ring; 220-Rotating member; 221-Slideway; 30-Steering cable; 40-Casing; 400-Bendable pipe section; 410-Straight pipe section; 411-Through hole; 420-Connecting pipe section; 50-Traction cable; 60-Electrode; 70-Drive block; 700-Limiting part; 80-Locking mechanism; 800-Magnetic part; 810-Electromagnet body; 90-Protective tube. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this utility model, it should be noted that the terms "middle," "top," "bottom," "lower," "left," "right," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] Biopsy forceps are commonly used instruments in endoscopic surgery, used to obtain tissue samples and remove polyps. Currently, when biopsy forceps are used in conjunction with an endoscope, the tip of the biopsy forceps cannot rotate freely, and the direction of the tip of the biopsy forceps is controlled only by the curvature of the endoscope lumen. Due to the limitations of the endoscope and the treatment position, the tip of the biopsy forceps cannot be turned to a reasonable position, which increases the difficulty of the operation and may even make the operation impossible, limiting the use of biopsy forceps. For example, in a narrow bronchus, the endoscope cannot reach the front end, resulting in a biopsy under direct vision, and it is also impossible to adjust the angle of the biopsy forceps through the endoscope; or, during endoscopic biopsy, the gastric curvature at the gastric fundus is limited by the bending radius of the endoscope, making operation inconvenient and the biopsy operation difficult.

[0035] See also Figure 1 and Figure 2 In view of this, the present embodiment provides a biopsy forceps 1, which can not only turn with the cooperation of the endoscope, but its own forceps head assembly 10 can also turn under the drive of the steering cable 30. The steering of the forceps head assembly 10 is more flexible and the operation is more convenient, which reduces the difficulty of the operation and improves the reliability of the operation.

[0036] In this embodiment, the biopsy forceps 1 includes a forceps head assembly 10, a handle assembly 20, a steering cable 30 and a flexible sleeve 40, one end of the sleeve 40 is connected to the forceps head assembly 10, and the other end of the sleeve 40 is connected to the handle assembly 20; one end of the steering cable 30 is connected to the forceps head assembly 10, and the other end of the steering cable 30 can move relative to the handle assembly 20, thereby driving the sleeve 40 to bend when the forceps head assembly 10 is pulled, so that the forceps head assembly 10 is bent relative to the handle assembly 20.

[0037] This embodiment provides a biopsy forceps 1, wherein the forceps head assembly 10 and the handle assembly 20 are provided with a steering cable 30. The steering cable 30 can control the bending of the forceps head assembly 10, making the biopsy forceps 1 more convenient to operate. When the biopsy forceps 1 is used in conjunction with an endoscope, the distal end of the endoscope can rotate under its own structure, and the sleeve 40 of the biopsy forceps 1 is passively bent under the curvature of the endoscope lumen, thereby driving the forceps head assembly 10 extending out of the endoscope to turn, thereby facilitating the implementation of the surgery. At the same time, during the surgery, when the steering of the endoscope lumen cannot meet the steering of the forceps head assembly 10, or when the steering of the endoscope lumen alone is difficult to meet the steering of the forceps head assembly 10, the steering cable 30 can be used. When the steering cable 30 is pulled, the sleeve 40 can be bent to a certain angle even without the drive of the endoscope, thereby causing the sleeve 40 to drive the forceps head assembly 10 to turn, so that the forceps head assembly 10 directly faces the tissue to be sampled, thereby improving the reliability of the surgery. When using the biopsy forceps 1 for surgery, the biopsy forceps 1 can not only turn the forceps head assembly 10 under the drive of the endoscope, but also turn under the pull of its own steering cable 30. The operation of the biopsy forceps 1 is flexible and convenient, and has higher reliability, which facilitates the implementation of the surgery.

[0038] It should be noted that the biopsy forceps 1 can be hot biopsy forceps or cold biopsy forceps, and both can achieve the above-mentioned effects during the operation.

[0039] See also Figure 3 In this embodiment, optionally, the pliers head assembly 10 includes a pliers frame 100, two pliers arms 110 and two connecting rods 120. The two pliers arms 110 are rotatably connected to the pliers frame 100, and the two pliers arms 110 are arranged crosswise; the two connecting rods 120 are rotatably connected to the two pliers arms 110 respectively, and the two connecting rods 120 are rotatably connected at one end away from the corresponding pliers arm 110.

[0040] Optionally, the clamp frame 100 includes a sleeve portion 101, a rotating shaft 102, and two clamp arms 103. The proximal end of the sleeve portion 101 is connected to the sleeve 40, and the distal end of the sleeve portion 101 is connected to the two clamp arms 103. The two clamp arms 103 are arranged opposite each other, and a space is formed between the two clamp arms 103 to accommodate the two clamp arms 110. Both ends of the rotating shaft 102 are connected to the two clamp arms 103.

[0041] Furthermore, the sleeve portion 101 is a cylindrical tube with open ends. The two clamping arms 103 are both long strips, located on the same diameter of the sleeve portion 101 and symmetrically arranged, and each clamping arm 103 is provided with a mounting hole 1031, and the two mounting holes 1031 on the two clamping arms 103 are coaxial.

[0042] Furthermore, each clamp arm 110 is provided with a rotation hole 111. The clamping surface of each clamp arm 110 can be a flat surface or a serrated surface.

[0043] The forceps head assembly 10 provided in this embodiment has two forceps arms 110 arranged crosswise and located between the two clamp arms 103. The rotation holes 111 of the two forceps arms 110 are connected, and the rotation shaft 102 passes through the rotation holes 111 of the two forceps arms 110 and connects with the mounting holes 1031 on the two clamp arms 103, thereby achieving rotational coordination of the two forceps arms 110 relative to the clamp arms 103. Two connecting rods 120 are respectively rotatably connected to the two forceps arms 110. The ends of the two connecting rods 120 away from the forceps arms 110 are rotatably connected and connected to the drive assembly of the biopsy forceps 1, which is used to drive the two forceps arms 110 to open or bite.

[0044] It should be noted that, in other embodiments, the forceps head assembly 10 may further include a positioning needle (not shown), which is connected to the rotating shaft 102 and extends along the axis of the sleeve portion 101 for penetrating into tissue to position the forceps head assembly 10 .

[0045] In this embodiment, the drive assembly optionally includes a traction cable 50, the distal end of which is connected to at least one of the two connecting rods 120, and the proximal end of which is connected to the handle assembly 20. The handle assembly 20 is used to drive the traction cable 50 to move, thereby driving the connecting rod 120 to rotate, ultimately causing the two clamp arms 110 to open or close.

[0046] It should be noted that the number of traction cables 50 is selected as needed. For example, in this embodiment, there is only one traction cable 50. In other embodiments, there are multiple traction cables 50, for example, there are two traction cables 50, each of which is connected to the two clamp arms 110, thereby controlling the rotation of each clamp arm 110. The two traction cables 50 cooperate to achieve the opening or closing of the two clamp arms 110. Obviously, when there are two traction cables 50, the traction cables 50 can be directly connected to the corresponding clamp arms 110.

[0047] See also Figure 4In this embodiment, the sleeve 40 optionally includes a bendable tube section 400, a straight tube section 410, and a connecting tube section 420. The bendable tube section 400, the straight tube section 410, and the connecting tube section 420 are sequentially connected and communicated. The bendable tube section 400 is used to connect and communicate with the sleeve portion 101; the connecting tube section 420 is used to connect to the handle assembly 20.

[0048] Optionally, the flexible tube section 400 and the connecting tube section 420 can be spring tubes for easier bending and deformation. The lengths of both the flexible tube section 400 and the connecting tube section 420 are greater than the length of the straight tube section 410. The straight tube section 410 has a continuous curved surface and weak deformation capability. By designing the straight tube section 410 shorter, it less likely affects the deformation capability of the cannula 40 as it curves along the endoscope lumen. In this embodiment, the straight tube section 410 is a cylindrical tube section with open ends.

[0049] Furthermore, the wall of the straight pipe section 410 is provided with a through hole 411. The through hole 411 can be cylindrical, square, or irregularly shaped. The axis of the through hole 411 forms an acute angle with the axis of the straight pipe section 410. In other words, the straight pipe section 410 has a proximal end connected to the connecting pipe section 420 and a distal end connected to the flexible pipe section 400. The through hole 411 located on the inner wall of the straight pipe section 410 is closer to the proximal end of the straight pipe section 410 than the through hole 411 located on the outer wall of the straight pipe section 410.

[0050] It should be noted that the straight tube section 410 has a certain elastic deformation capability and can bend with the bending of the endoscope. Alternatively, in other embodiments, the straight tube section 410 is short and may not be configured as a hose, as long as it can pass through the bending position of the endoscope.

[0051] In other embodiments, the through hole 411 may be a strip-shaped hole extending along the length direction of the straight pipe section 410 .

[0052] In this embodiment, the distal end of the steering cable 30 passes through the proximal end of the connecting pipe section 420 and enters the straight pipe section 410, then passes through the through hole 411 of the straight pipe section 410, and finally, the distal end of the steering cable 30 is connected to the sleeve portion 101 of the clamp frame 100. Furthermore, the position where the distal end of the steering cable 30 is connected to the sleeve portion 101 is spaced apart from the axis of the sleeve portion 101. In other words, the position where the steering cable 30 is connected to the sleeve portion 101 is eccentrically arranged with respect to the sleeve portion 101. For example, in this embodiment, the steering cable 30 is welded and fixed to the outer tube wall of the sleeve portion 101. In this way, when the steering cable 30 is pulled, the torque applied by the steering cable 30 to the sleeve tube to bend the flexible pipe section 400 is greater, thereby facilitating the bending of the flexible pipe section 400. Furthermore, the steering cable 30 is partially located outside the flexible tube section 400, so it does not contact the inner wall of the flexible tube section 400. This eliminates friction and interference between the two, facilitating angle control of the clamp assembly 10. Furthermore, because the axis of the through hole 411 through which the steering cable 30 passes forms an acute angle with the axis of the straight tube section 410, the force exerted on the straight tube section 410 by the steering cable 30 when it contacts the end of the through hole 411 is minimal, minimizing wear.

[0053] See also Figure 1 and Figure 2 In this embodiment, the handle assembly 20 optionally includes a core rod 200, a sliding sleeve 210, and a rotating member 220. The core rod 200 and the sliding sleeve 210 slide together along a predetermined direction, and the rotating member 220 rotates with the core rod 200 about the axis of the core rod 200, and the two are relatively fixed in the predetermined direction. The straight line in the predetermined direction is parallel to the axis of the core rod 200.

[0054] Furthermore, the core rod 200 is provided with a first hand ring 201 and a slide groove 202 . The slide groove 202 extends along the axial direction of the core rod 200 , and the distal end of the slide groove 202 extends to the end surface where the distal end of the core rod 200 is located.

[0055] Furthermore, the sliding sleeve 210 is provided with two opposite second hand rings 211 . The sliding sleeve 210 is sleeved outside the core rod 200 , and the two are relatively fixed in the circumferential direction of the core rod 200 .

[0056] Furthermore, the rotating member 220 is provided with a slideway 221, which is sleeved outside the core rod 200 and rotates with the core rod 200, and the two are relatively fixed in the direction of the axis extension of the core rod 200. The slideway 221 on the rotating member 220 is parallel to the slide groove 202 on the core rod 200.

[0057] In this embodiment, the biopsy forceps 1 optionally further includes an electrode 60, which is connected to the sliding sleeve 210 and inserted into the sliding groove 202. When the sliding sleeve 210 and the core rod 200 slide relative to each other, the sliding sleeve 210 drives the electrode 60 to slide along a predetermined direction in the sliding groove 202. The distal end of the electrode 60 is connected to the traction cable 50.

[0058] See also Figure 1 、 Figure 2 and Figure 5 In this embodiment, optionally, the biopsy forceps 1 further includes a driving block 70 , which slides with the core rod 200 in a preset direction, and the proximal end of the steering cable 30 is connected to the driving block 70 .

[0059] Furthermore, the driving block 70 includes two relatively arranged limiting parts 700. The driving block 70 slides with the slide 221 of the rotating member 220. The slide 221 is clamped between the two limiting parts 700, thereby limiting the movement of the driving block 70 in the direction perpendicular to the axis of the core rod 200. The driving block 70 slides more smoothly along the preset direction.

[0060] It should be noted that, in other embodiments, the driving block 70 may directly slide in cooperation with the core rod 200 .

[0061] Optionally, the biopsy forceps 1 further includes a locking mechanism 80, which is used to limit the relative sliding of the driving block 70 and the rotating member 220, so that when the driving block 70 slides to a preset position, the driving block 70 and the rotating member 220 are kept relatively fixed in a preset direction.

[0062] Optionally, the locking mechanism 80 is an electromagnet assembly, wherein the magnetic member 800 of the electromagnet assembly is disposed on the driving block 70, and the electromagnet body 810 of the electromagnet assembly is disposed on the rotating member 220 or the core rod 200. When the electromagnet assembly is energized, the electromagnet body 810 becomes magnetic, thereby magnetically connecting with the magnetic member 800 on the driving block 70, thereby maintaining the relative position of the driving block 70. Conversely, when the power is removed, the driving block 70 can slide freely.

[0063] It should be understood that in other embodiments, the driving block 70 itself can be configured as a magnetic body, or a portion of the driving block 70 can be a magnetic body, so that the magnetic body on the driving block 70 can be magnetically connected to the electromagnet body after power is supplied.

[0064] It should be noted that the structure of the locking mechanism 80 is not limited to the electromagnet assembly, and other structures may also be used, which are not listed one by one in this embodiment.

[0065] The biopsy forceps 1 provided in this embodiment further includes a protective tube 90 . The protective tube 90 is sleeved outside the connecting tube section 420 of the sleeve 40 , and the proximal end of the protective tube 90 is connected to the rotating member 220 .

[0066] The biopsy forceps 1 provided in this embodiment can control the opening or closing of the two arms 110 of the biopsy forceps 1 by operating the sliding sleeve 210 and the core rod 200. By operating the drive block 70, the flexible tube section 400 can be individually driven to bend, thereby adjusting the steering angle of the forceps head assembly 10. Simultaneously, by combining the structure of the rotating member 220 with the core rod 200, the core rod 200 can be rotated by holding the rotating member 220, thereby driving the sliding sleeve 210 to rotate together. Since the electrode 60 is connected to the sliding sleeve 210, the traction cable 50 is connected to the electrode 60, and the arm 110 is connected to the traction cable 50, the forceps head assembly 10 rotates along the circumference of the traction cable 50 along with the core rod 200, thereby achieving 360° steering angle control of the forceps head assembly 10. The biopsy forceps 1 are flexible and convenient to use, highly reliable, and reduce surgical difficulty and improve surgical success rates.

[0067] It should be noted that, in this embodiment, the proximal end of the biopsy forceps 1 and each component of the biopsy forceps 1 refers to the end close to the operator when the biopsy forceps 1 is normally used; the distal end of the biopsy forceps 1 and each component of the biopsy forceps 1 refers to the end close to the patient when the biopsy forceps 1 is normally used.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A biopsy forceps, characterized in that: include: A pliers assembly, a handle assembly, a steering cable and a flexible sleeve, one end of the sleeve is connected to the pliers assembly, and the other end of the sleeve is connected to the handle assembly; one end of the steering cable is connected to the pliers assembly, and the other end of the steering cable can move relative to the handle assembly, thereby driving the sleeve to bend when the pliers assembly is pulled, so that the pliers assembly bends relative to the handle assembly.

2. The biopsy forceps according to claim 1, characterized in that: The clamp head assembly includes a clamp frame and two clamp arms, the two clamp arms are rotatably connected to the clamp frame, one end of the steering cable is fixedly connected to the clamp frame; one end of the sleeve is connected to the clamp frame.

3. The biopsy forceps according to claim 2, characterized in that: The clamp frame has a sleeve portion, the sleeve portion is plug-fitted with the sleeve, the steering cable is connected to the sleeve portion, and a connection position between the steering cable and the sleeve portion is spaced from an axis of the sleeve portion.

4. The biopsy forceps according to claim 1, characterized in that: One end of the steering cable connected to the clamp head assembly passes through the wall of the sleeve.

5. The biopsy forceps according to claim 4, characterized in that: The sleeve includes a bendable pipe section and a straight pipe section, one end of the bendable pipe section is connected to the straight pipe section, the straight pipe section is connected to the handle assembly, a through hole is provided in the pipe wall of the straight pipe section, part of the steering cable is passed through the straight pipe section, and the steering cable passes through the through hole and is connected to the clamp head assembly.

6. The biopsy forceps according to claim 5, characterized in that: The bendable tube section is configured as a spring tube.

7. The biopsy forceps according to claim 1, characterized in that: The biopsy forceps further comprises a driving block, which is slidably matched with the handle assembly, and one end of the steering cable away from the forceps head assembly is connected to the driving block.

8. The biopsy forceps according to claim 7, characterized in that: The handle assembly includes a core rod and a sliding sleeve that are slidably matched along a preset direction. The sleeve is connected to the core rod, and the drive block is slidably matched with the core rod along the preset direction.

9. The biopsy forceps according to claim 8, characterized in that: The biopsy forceps further includes a locking mechanism, which is used to limit the relative sliding of the drive block and the core rod, so that when the drive block slides to a preset position, the drive block and the core rod are kept relatively fixed in the preset direction.

10. The biopsy forceps according to claim 8 or 9, characterized in that: The handle assembly further comprises a rotating member, wherein the rotating member is rotatably matched with the core rod around the axis of the core rod.

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