Tissue sampling mechanisms and biopsy forceps

Abstract

The present application provides a tissue sampling mechanism and a biopsy forceps, the tissue sampling mechanism includes a forceps body, a base body and a driving body, the base body is provided with a rotating connection part, the forceps body is rotatably connected to the rotating connection part, the forceps body has a first occlusal side at the rear in a first rotation direction, the first occlusal side is provided with a first execution part, the base body has a second occlusal side at the front in the first rotation direction, the second occlusal side is provided with a second execution part, and the second execution part is located on the side of the rotating connection part close to the proximal end of the base body; the first execution part can rotate along the second rotation direction opposite to the first rotation direction to the side of the rotating connection part away from the proximal end of the base body; the driving body is connected to the forceps body, and is used to drive the forceps body to rotate relative to the base body. The tissue sampling mechanism provided in this embodiment can obtain the required tissue sample when the biopsy forceps insertion direction is roughly parallel to the direction of the tissue cavity, the operation is convenient and reliable, and the success rate of the operation is high.

Description

Technical Field

[0001] The invention relates to the field of medical equipment, and in particular to a tissue sampling mechanism and a biopsy forceps. Background Art

[0002] Endoscopic examination has been widely used in clinical practice as an auxiliary examination and diagnostic method. At present, biopsy forceps are an indispensable tool for obtaining pathological specimens during endoscopic examination. When the biopsy forceps used in clinical practice are used for biopsy, if the angle between the insertion direction of the biopsy forceps and the biopsy position is close to 180°, that is, the body of the biopsy forceps is roughly parallel to the tissue wall, the body of the biopsy forceps is not easy to bite into the tissue for corresponding biopsy. Summary of the invention

[0003] The object of the present invention is to provide a tissue sampling mechanism and a biopsy forceps, which can perform a sampling operation when the biopsy forceps are inserted at an angle substantially parallel to a tissue wall.

[0004] The embodiment of the present invention is achieved as follows:

[0005] In a first aspect, the present invention provides a tissue sampling mechanism, comprising:

[0006] A pliers body, a base and a driving body, wherein the base is provided with a rotating connection part, the pliers body is rotatably connected to the rotating connection part, the pliers body has a first occlusal side at the rear in a first rotation direction, a first actuator is provided on the first occlusal side, the base has a second occlusal side at the front in the first rotation direction, a second actuator is provided on the second occlusal side, and the second actuator is located on a side of the rotating connection part close to the proximal end of the base; the first actuator can be rotated along a second rotation direction opposite to the first rotation direction to a side of the rotating connection part away from the proximal end of the base; the driving body is connected to the pliers body, and is used to drive the pliers body to rotate relative to the base.

[0007] Optionally, the clamp body and the base are connected via a rotating shaft.

[0008] Optionally, the rotating connection portion is a through hole, the rotating shaft is inserted into the through hole, and the clamp body is sleeved outside the rotating shaft.

[0009] Optionally, the pliers body has a relative proximal end and a distal end, the proximal end of the pliers body is rotatably connected to the base through the rotating connection part, and the connection position between the driving body and the pliers body is located between the distal end of the pliers body and the rotating connection part.

[0010] Optionally, the driving body is detachably connected to the clamp body.

[0011] Optionally, the first execution part includes a plurality of meshing teeth arranged continuously.

[0012] Optionally, the plurality of meshing teeth include a first meshing tooth, a second meshing tooth and a third meshing tooth arranged in sequence, the first meshing tooth and the third meshing tooth are arranged at intervals in the axial direction of the rotating connection part, and the second meshing tooth is located between the first meshing tooth and the third meshing tooth.

[0013] Optionally, the first engaging side is provided with a receiving groove, and a portion of the receiving groove is located in a region surrounded by the first engaging teeth, the second engaging teeth and the third engaging teeth.

[0014] Optionally, the base includes a mounting tube and two mounting arms, the two mounting arms are connected to the proximal end of the mounting tube and are arranged opposite to each other, and the clamp body is located between the two mounting arms and is rotatably connected to the two mounting arms through the rotating connection part.

[0015] Optionally, the base also includes a blocking block, which is connected to the mounting tube and is located between the two mounting arms, and there is a gap between the end surface of the blocking block away from the mounting tube and the end surface of the mounting arm away from the mounting tube; the blocking block is used to abut against the pliers body when the pliers body rotates along the second rotation direction to limit the rotation angle of the pliers body relative to the base along the second rotation direction.

[0016] Optionally, the caliper body has a connecting portion and an assembly portion connected to each other, the width of the connecting portion in the axial direction of the rotating connecting portion is smaller than the width of the assembly portion in the axial direction of the rotating connecting portion, and the connecting portion is located between the two mounting arms and is rotatably connected to the two mounting arms through the rotating connecting portion;

[0017] The first execution part is arranged on the assembly part.

[0018] Optionally, the base body is provided with a groove, the second executing part is located on a groove wall of the groove, and the first executing part can be embedded in the groove when rotating along the first rotation direction.

[0019] Optionally, at least one of the first executing portion and the second executing portion is provided with a blade, and the blade is used to separate the sampled tissue clamped between the first executing portion and the second executing portion from the matrix tissue when the first executing portion and the second executing portion are engaged.

[0020] Optionally, the end surface of the clamp body away from the base body is configured as a curved surface.

[0021] Optionally, the caliper body also includes an assembly part, one end of which is rotatably connected to the base, and the first actuator is connected to the other end of the assembly part; the driving body is connected to the assembly part, and the connection position of the driving body and the assembly part is located between the rotating shaft and the first actuator.

[0022] Optionally, the assembly part is provided with a clamping hole, and the hole wall of the clamping hole is provided with a limiting part; the driving body is provided with a matching part, the driving body is passed through the clamping hole, and the matching part is abutted against the limiting part to prevent the matching part from falling out of the clamping hole when the driving body drives the caliper body to move along the first rotation direction.

[0023] Optionally, the clamping hole includes two hole segments with different hole diameters, and the limiting portion is a step structure formed at the junction of the two hole segments;

[0024] Alternatively, the card hole has a first end and a second end arranged in the first rotation direction, and the first end is located in front of the second end in the first rotation direction; the aperture of the card hole gradually increases in the direction from the first end to the second end, and the limiting portion is at least a portion of the hole wall of the card hole.

[0025] Optionally, the base body is provided with a sliding cavity, the driving body is penetrated in the sliding cavity, and the driving body is slidably matched with the base body along the extension direction of the sliding cavity.

[0026] Optionally, the tissue sampling mechanism also includes a direction adjusting body, which is connected to the base body, and the driving body abuts against a side of the direction adjusting body away from the first executing part in the first rotation direction, so that when the driving body slides relative to the base body, a bending portion can be formed at the position where the driving body abuts against the direction adjusting body.

[0027] Optionally, when the first executing portion is driven by the driving body to rotate along the first rotation direction to engage with the second executing portion, the angle of the bending portion is equal to 60°-120°.

[0028] Optionally, the angle of the bending portion is equal to 60°, 90° or 120°.

[0029] Optionally, the direction adjusting body is rotatably connected to the base body, and the direction adjusting body is provided with a curved surface that abuts against the driving body.

[0030] Optionally, the tissue sampling mechanism further comprises a reset member, which is connected to both the clamp body and the base body and is used to cause the clamp body to generate a tendency to rotate relative to the base body along a second rotation direction.

[0031] Optionally, the reset member is configured as a torsion spring, the torsion spring is sleeved outside the rotating shaft, and two force arms of the torsion spring are respectively connected to the pliers body and the base.

[0032] Optionally, the driving body is configured as an elastic member, and the driving body is used to cause the pliers body to generate a tendency to rotate relative to the base body along the second rotation direction.

[0033] Optionally, the base is provided with a blocking portion, which is used to abut against the pliers body when the pliers body rotates relative to the base along the second rotation direction, so as to limit the rotation angle of the pliers body in the second rotation direction.

[0034] In a second aspect, the present invention provides a biopsy forceps, the biopsy forceps comprising:

[0035] The tissue sampling mechanism of any of the preceding embodiments.

[0036] Optionally, the biopsy forceps further comprises a handle mechanism, which comprises a slidably matched fixing member and a sliding member, wherein the fixing member is connected to the base, and the sliding member is connected to the driving body, and is used to drive the driving body to slide relative to the base.

[0037] The beneficial effects of the embodiments of the present invention are:

[0038] In summary, the present embodiment provides a tissue sampling mechanism that can cooperate with an endoscope to be inserted into a tissue cavity to be sampled, such as a bile duct or a gastric tract. It is assumed that when the tissue sampling mechanism is inserted into the tissue cavity, the clamp body is first placed in an open state, that is, the clamp body is rotated relative to the base body in the second rotation direction by a set angle, and the clamp body is rotated until the first actuator is located on the side of the rotation axis away from the base body, so that the first actuator can face the tissue wall of the tissue cavity to be sampled. When the first actuator is placed in the set position with the cooperation of the endoscope, the extension direction of the base body is roughly parallel to the tissue wall, and the distance between the first actuator and the tissue wall is less than the distance between the distal end of the clamp body and the rotation axis. The base body is kept stationary, and the driving body is operated to slide relative to the base body, and the driving body drives the first actuator to rotate and approach the tissue wall. When the first execution part contacts the tissue wall, the first execution part is continuously rotated along the first rotation direction close to the second execution part, and the first execution part can apply pressure on the tissue wall, and the first execution part has a tendency to sink into the tissue wall, thereby digging out part of the tissue on the tissue wall during the contact between the first execution part and the tissue wall. After the first execution part digs out part of the tissue, the first execution part passes over the tissue wall, and the dug part of the tissue is separated from the tissue wall and clamped between the first execution part and the second execution part, and then the tissue sampling mechanism is withdrawn from the endoscope forceps channel to complete the tissue sampling operation. The tissue sampling mechanism provided in this embodiment can obtain the required tissue sample when the insertion direction of the biopsy forceps is roughly parallel to the direction of the tissue cavity channel. The operation is convenient and reliable, and the success rate of the operation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a structural schematic diagram of a tissue sampling mechanism according to an embodiment of the present invention (the clamp body is in a closed state);

[0041] Figure 2 It is a structural schematic diagram of a tissue sampling mechanism according to an embodiment of the present invention (the clamp body is in an open state);

[0042] Figure 3 It is a schematic diagram of the exploded structure of the tissue sampling mechanism according to an embodiment of the present invention;

[0043] Figure 4 It is a schematic cross-sectional structural diagram of a tissue sampling mechanism according to an embodiment of the present invention (the clamp body is in a closed state);

[0044] Figure 5 A schematic structural diagram of a substrate from one perspective of an embodiment of the present invention;

[0045] Figure 6 A schematic structural diagram of a base body from another perspective of an embodiment of the present invention;

[0046] Figure 7 A schematic structural diagram of a pliers body from one perspective of an embodiment of the present invention;

[0047] Figure 8 A schematic structural diagram of a pliers body from another perspective of an embodiment of the present invention;

[0048] Fig. 9 Schematic diagram of the structure of the biopsy forceps according to an embodiment of the present invention.

[0049] icon:

[0050] 001-biopsy forceps; 101-front end; 102-rear end; 002-tissue sampling mechanism; 100-forceps body; 1001-first occlusal side; 1002-connecting part; 110-first execution part; 111-first occlusal tooth; 112-second occlusal tooth; 113-third occlusal tooth; 120-assembly part; 121-card hole; 1211-limiting part; 122-curved surface; 123-accommodating groove; 200-base; 201-second occlusal side; 210-installation cylinder; 211-sliding cavity; 2 20-mounting arm; 221-first assembly hole; 222-second assembly hole; 230-blocking block; 231-blocking part; 240-groove; 241-first opening side; 242-second opening side; 243-second actuator; 300-driving body; 310-bending part; 400-first rotating axis; 500-second rotating axis; 600-direction adjustment body; 700-handle mechanism; 710-fixing part; 720-sliding part; 730-spring tube; 740-cable; 750-bracelet. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] 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, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the following embodiments, unless otherwise specified, the direction indicated by the arrows ab in the drawings is the first rotation direction, the direction indicated by the arrow ba is the second rotation direction, and the first rotation direction and the second rotation direction are opposite.

[0058] See also Figure 1-Figure 8 The tissue sampling mechanism 002 provided in this embodiment is mainly applied to the biopsy forceps 001. The forceps body 100 can enter the tissue cavity in the direction in which the tissue cavity extends in the form of an open state, and the first execution part 110 located on the forceps body 100 can face the tissue wall of the tissue cavity, so that the first execution part 110 is used to dig out part of the tissue on the tissue wall to obtain a tissue sample, that is, the tissue sampling mechanism 002 of this embodiment can obtain the required tissue sample when the insertion direction of the biopsy forceps 001 is roughly parallel to the direction of the tissue cavity, the operation is convenient and reliable, and the success rate of the operation is high.

[0059] It should be noted that, in the present embodiment, those skilled in the art can understand that, when biopsy forceps 001 is used for surgical operations, the front end 101 of biopsy forceps 001 contacts the patient, and the rear end 102 is for the operator to operate. For the convenience of description, the end of each component of biopsy forceps 001 close to the front end 101 of biopsy forceps 001 is called the distal end, and the end of each component close to the rear end 102 of biopsy forceps 001 is called the proximal end.

[0060] See also Figure 1-Figure 4 In this embodiment, the tissue sampling mechanism 002 includes:

[0061] The pliers body 100 has a first occlusal side 1001 at the rear in a first rotation direction, and a first execution part 110 is provided on the first occlusal side 1001;

[0062] The base 200 has a second occlusal side 201 in front of the first rotation direction, and a second actuator 243 is provided on the second occlusal side 201. The pliers body 100 and the base 200 are rotatably connected through a rotating shaft, and the second actuator 243 is located on a side of the rotating shaft close to the proximal end of the base 200; the second actuator 243 can occlude with the first actuator 110 when the pliers body 100 rotates relative to the base 200 along the first rotation direction; and the first actuator 110 can rotate along a second rotation direction opposite to the first rotation direction to a side of the rotating shaft close to the distal end of the base 200;

[0063] And a driving body 300 , the driving body 300 is slidably matched with the base body 200 , and the driving body 300 is connected to the pliers body 100 to drive the pliers body 100 to rotate relative to the base body 200 .

[0064] The tissue sampling mechanism 002 provided in this embodiment can be inserted into the tissue cavity to be sampled, such as the bile duct, in conjunction with the endoscope. It is set that when the tissue sampling mechanism 002 is inserted into the tissue cavity, the clamp body 100 is first opened, that is, the clamp body 100 is rotated by a set angle in the second rotation direction relative to the base 200, thereby effectively improving the problem of the clamp body 100 being blocked from opening due to limited space in the body when the clamp body 100 is inserted into the body and then opened. In addition, when the clamp body 100 is in the open state, the clamp body 100 rotates until the first actuator 110 is located on the side of the rotating shaft away from the base 200, so that the first actuator 110 can face the tissue wall of the tissue cavity to be sampled.

[0065] When the first actuator 110 is placed in the set position with the cooperation of the endoscope, the extension direction of the base 200 is roughly parallel to the tissue wall, that is, the tissue sampling mechanism 002 enters the tissue cavity along the extension direction of the tissue cavity, and the position of the first actuator 110 is adjusted so that the first actuator 110 faces the side of the tissue wall to be sampled and the distance between the first actuator 110 and the tissue wall is smaller than the distance between the distal end of the forceps body 100 and the rotating shaft, the base 200 is kept stationary, the driving body 300 is operated, the driving body 300 slides relative to the base 200, and the driving body 300 drives the first actuator 110 to rotate and approach the tissue wall. When the first actuator 110 contacts the tissue wall, the first actuator 110 is continuously rotated along the first rotation direction close to the second actuator 243, the first actuator 110 can apply pressure on the tissue wall, and the first actuator 110 has a tendency to sink into the tissue wall, so that part of the tissue on the tissue wall is dug out during the contact between the first actuator 110 and the tissue wall. After the first executing part 110 digs out part of the tissue, the first executing part 110 passes over the tissue wall, and the dug out part of the tissue is separated from the tissue wall and clamped between the first executing part 110 and the second executing part 243, and then the tissue sampling mechanism 002 is withdrawn from the endoscope forceps channel to complete the tissue sampling operation.

[0066] The tissue sampling mechanism 002 provided in this embodiment can obtain the required tissue sample when the insertion direction of the biopsy forceps 001 is roughly parallel to the direction of the tissue cavity. The operation is convenient and reliable, and the success rate of the operation is high.

[0067] See also Figure 5 and Figure 6In this embodiment, optionally, the base 200 is a hollow structure. Specifically, the base 200 includes a mounting tube 210, two mounting arms 220 and a blocking block 230. The two mounting arms 220 are connected to one end of the mounting tube 210, and the two mounting arms 220 are arranged at a relative interval. The blocking block 230 is connected to the mounting tube 210 and the two mounting arms 220 at the same time. The blocking block 230 is located between the two mounting arms 220, and the length of the blocking block 230 in the extension direction of the mounting tube 210 is less than the length of the mounting arms 220, so that the blocking block 230 and the two mounting arms 220 form a groove structure together. The side of the blocking block 230 away from the mounting tube 210 is the bottom wall of the groove, which is also the blocking portion 231. The blocking portion 231 is used to abut against the pliers body 100 when the pliers body 100 rotates along the second rotation direction, thereby limiting the position of the pliers body 100 rotating along the second rotation direction.

[0068] Furthermore, the installation tube 210 has a tube cavity with two ends open, which can also be called a sliding cavity 211. The installation tube 210 can be a cylindrical tube, and the outer peripheral surface of the installation tube 210 is a cylindrical surface, which is not easy to scratch the tissue wall when entering the body.

[0069] The two mounting arms 220 are symmetrically arranged with the plane passing through the central axis of the mounting cylinder 210 as the symmetry plane, and the two mounting arms 220 are located on the same diameter of the mounting cylinder 210. Each mounting arm 220 is provided with a first assembly hole 221 and a second assembly hole 222, and the first assembly hole 221 is also a rotating connection part. The first assembly hole 221 and the second assembly hole 222 are both cylindrical holes. The two first assembly holes 221 are coaxially arranged, and the first rotating shaft 400 is simultaneously penetrated in the two first assembly holes 221; the two second assembly holes 222 are coaxially arranged, and the second rotating shaft 500 is simultaneously penetrated in the two second assembly holes 222. At the same time, the second assembly hole 222 is closer to the mounting cylinder 210 than the first assembly hole 221, that is, the second assembly hole 222 is located between the first assembly hole 221 and the mounting cylinder 210, and the second rotating shaft 500 is located between the first rotating shaft 400 and the mounting cylinder 210.

[0070] It should be noted that the two mounting arms 220 are connected to one end of the mounting tube 210 and extend along the axis of the mounting tube 210. The two mounting arms 220 and the mounting tube 210 jointly define a groove 240, which is a through groove. For ease of description, the groove 240 has a first opening side 241 and a second opening side 242 opposite to each other in its extension direction. The blocking block 230 is fixed to one end of the mounting tube 210 and is located between the two mounting arms 220 and blocks part of the first opening side 241. The second opening side 242 allows the pliers body 100 to enter the groove 240 when rotating relative to the base 200 along the first rotation direction. The groove wall of the groove 240 corresponding to the second opening side 242 is the second actuator 243. The two mounting arms 220, the blocking block 230 and the mounting tube 210 are connected to each other, so that the structure of the base 200 is firm and reliable.

[0071] It should be understood that the mounting cylinder 210, the blocking block 230 and the two mounting arms 220 can be manufactured in an integrally formed manner, and the structure is more solid and reliable.

[0072] Furthermore, the first opening side 241 is provided with a blade, which is used to cooperate with the first execution part 110 to facilitate separation of the tissue sample from the tissue wall after the first execution part 110 digs out the tissue. It should be understood that the first opening side 241 can be provided with a blade, and the blade covers a wide area, which facilitates the separation of tissue.

[0073] See also Figure 7 and Figure 8 In this embodiment, optionally, the clamp body 100 includes an integrally formed connection portion 1002, an assembly portion 120 and a first execution portion 110. The connection portion 1002 is provided with a through hole. The connection portion 1002 is sleeved outside the first rotating shaft 400 by using the through hole and is rotatably connected to the base 200. At the same time, the connection portion 1002 is located between the two mounting arms 220, and the width of the assembly portion 120 in the axial direction of the first rotating shaft 400 is greater than the width of the connection portion 1002 in the axial direction of the first rotating shaft 400. In this way, the connection portion 1002 is embedded between the two mounting arms 220, and the assembly portion 120 will not interfere with the mounting arms 220. The area on the assembly portion 120 for setting the first execution portion 110 is large, and the first execution portion 110 covers a large area during operation, making sampling more convenient. The first execution part 110 is located at the other end of the assembly part 120, and the first execution part 110 includes a plurality of engaging teeth. The assembly part 120 has a front side and a rear side in the first rotation direction, that is, the front side is located in front of the rear side in the first rotation direction, and the plurality of engaging teeth are located on the front side of the assembly part 120. In this way, when the forceps body 100 rotates relative to the base 200 along the first rotation direction, the first execution part 110 can dig tissue on the tissue wall and enter the groove 240 from the second opening side 242 to engage with the second execution part 243.

[0074] Furthermore, a receiving groove 123 is provided on the front side of the assembly portion 120, and a plurality of engaging teeth of the first execution portion 110 are arranged in sequence along the circumference of the receiving groove 123. When the first execution portion 110 digs out part of the tissue, the part of the tissue can enter the receiving groove 123, so that a sufficient amount of tissue samples can be obtained, and the integrity of the tissue samples located in the receiving groove 123 is also improved.

[0075] Specifically, the first actuator 110 includes a first meshing tooth 111, a second meshing tooth 112, and a third meshing tooth 113 arranged in sequence. The first meshing tooth 111, the second meshing tooth 112, and the third meshing tooth 113 are arranged in sequence in the circumferential direction of the receiving groove 123, that is, the first meshing tooth 111 and the third meshing tooth 113 are arranged at intervals in the axial direction of the rotating connection portion, the second meshing tooth 112 is located between the first meshing tooth 111 and the third meshing tooth 113, and a portion of the receiving groove 123 is located in the area surrounded by the first meshing tooth 111, the second meshing tooth 112, and the third meshing tooth 113. At the same time, the plurality of meshing teeth are arranged close to the distal end of the pliers body 100, that is, far away from the first rotating shaft 400, so that a larger force arm can be obtained, the torque is increased, and it is more convenient to dig tissue.

[0076] It should be noted that the number of meshing teeth is not limited to three.

[0077] Further, the end surface of the assembly part 120 away from the base 200 is set as a curved surface 122. For example, the end surface of the assembly part 120 away from the base 200 is set as a spherical surface. When the assembly part 120 rotates relative to the tissue wall, the curved surface 122 contacts the tissue and is not easy to scratch the tissue. The assembly part 120 is also provided with a clamping hole 121. The hole wall of the clamping hole 121 is provided with a limiting part 1211. The limiting part 1211 is used to abut against the driving body 300 when the driving body 300 is inserted into the clamping hole 121 to prevent the driving body 300 from escaping from the clamping hole 121.

[0078] Optionally, the clamping hole 121 is configured as a variable diameter hole, the clamping hole 121 has a first end and a second end arranged at intervals in the first rotation direction, and the first end is located in front of the second end in the first rotation direction; the aperture of the clamping hole 121 gradually increases in the direction from the first end to the second end, and the limiting portion 1211 is at least a part of the hole wall of the clamping hole 121. In other words, the port where the first end of the clamping hole 121 is located is a constricted port, and the port where the second end is located is an open port, the proximal end of the driving body 300 penetrates from the second end and passes out from the first end, and the distal end of the driving body 300 cannot pass out of the first end, thereby achieving a clamping fit with the clamping hole 121.

[0079] Alternatively, in other embodiments, the clamping hole 121 is not set as a gradual hole, the clamping hole 121 includes two connected hole segments with different apertures, the limiting portion 1211 is a step structure formed at the junction of the two hole segments, and the hole segment with a larger aperture of the clamping hole 121 is located at the rear in the first rotation direction, and the hole segment with a smaller aperture of the clamping hole 121 is located at the front in the second rotation direction. The proximal end of the driver 300 can enter from the end with a larger aperture and pass through from the end with a smaller aperture, and the distal end of the driver 300 abuts against the step structure to prevent the driver 300 from slipping out of the clamping hole 121 when driving the pliers 100 to rotate along the first rotation direction.

[0080] Obviously, the shape and structure of the clamp hole 121 may not be limited to the above two cases, as long as it can be connected to the driver 300 and prevent the driver 300 from slipping out of the clamp hole 121 when the driver 300 drives the pliers 100 to rotate along the first rotation direction. For example, the clamp hole 121 may be a hole structure with the same diameter everywhere, and the driver 300 is directly inserted into the clamp hole 121 and connected to the pliers 100 by welding, bonding or snapping.

[0081] Furthermore, a blade is disposed on the outer edge of the first executing portion 110 , and when the first executing portion 110 is engaged with the second executing portion 243 , the blade can cut tissue, thereby facilitating the separation of the tissue dug by the first executing portion 110 from the tissue wall.

[0082] It should be noted that, in other embodiments, only one of the first executing part 110 and the second executing part 243 needs to be provided with a blade, and both the first executing part 110 and the second executing part 243 do not need to be provided with blades, thereby reducing processing difficulty and saving costs.

[0083] In other embodiments, a blade may also be provided at the edge of the assembly portion 120. When a large amount of tissue is excavated by the first execution portion 110, part of the tissue is located between the assembly portion 120 and the second execution portion 243. The tissue is cut by the blade provided at the edge of the assembly portion 120 to facilitate tissue separation.

[0084] In this embodiment, optionally, the tissue sampling mechanism 002 further includes a direction adjustment body 600, which is sleeved outside the second rotating shaft 500. The direction adjustment body 600 and the base body 200 are rotatably matched, which can reduce friction, reduce wear, and improve flexibility.

[0085] Further, the outer peripheral surface of the direction adjustment body 600 is configured as a curved surface 122 , for example, the direction adjustment body 600 is configured as a hollow cylinder. After the direction adjustment body 600 is sleeved on the second rotating shaft 500, there is a gap between the outer peripheral surface of the direction adjustment body 600 and the blocking block 230. The driving body 300 passes through the gap between the direction adjustment body 600 and the blocking block 230 and is connected to the pliers body 100. Moreover, when the driving body 300 pulls the pliers body 100 to rotate the pliers body 100 along the first rotation direction, the driving body 300 can abut against the outer peripheral surface of the direction adjustment body 600 to deform the driving body 300. The driving body 300 forms a bending portion 310 at the direction adjustment body 600, thereby adjusting the direction of the pulling force applied by the driving body 300 to the pliers body 100. While increasing the bite force between the pliers body 100 and the base 200, the closing degree of the pliers body 100 and the base 200 can be improved, so that the pliers body 100 and the base 200 are completely closed.

[0086] It should be noted that when the driving body 300 pulls the pliers body 100 to rotate the pliers body 100 in the first rotation direction relative to the base 200 until it is fully engaged with the second actuator 243, the assembly part 120 and the mounting tube 210 have the same extension direction, and the angle of the bending part formed by the driving body 300 at the direction adjustment body 600 is 90°. In other words, the line connecting the connection position between the driving body 300 and the assembly part 120 and the contact position between the driving body 300 and the direction adjustment body 600 is perpendicular to the extension direction of the assembly part 120. At this time, the direction of the force applied by the driving body 300 to the assembly part 120 is perpendicular to the assembly part 120, the engagement force between the pliers body 100 and the base 200 is the largest, and the pliers body 100 and the base 200 can be fully engaged.

[0087] In other embodiments, when the driver 300 pulls the pliers 100 to rotate the pliers 100 relative to the base 200 in the first rotation direction to fully engage with the second actuator 243, the angle of the bending portion formed by the driver 300 at the direction adjustment body 600 can be in the range of 60°-120°, and is not limited to 90°. For example, it can also be 60° or 120°. Please refer to Figure 4When the angle of the bending portion formed by the driving body 300 at the direction adjustment body 600 is 90°, at this time, the torque applied to the clamp body 100 = F·d, wherein F is the force applied to the driving body 300, and d is the lever arm. At this time, the torque is maximum, and the bite force of the first actuator 110 and the second actuator 243 is maximum. At this time, the sampled tissue bitten between the first actuator 110 and the second actuator 243 is not easy to break away from the bite area formed by the first actuator 110 and the second actuator 243 when it is separated from the matrix tissue, that is, the sampled tissue is not easy to produce relative displacement between the first actuator 110 and the second actuator 243, the success rate of the tissue sampling operation is high, and the obtained sampled tissue is not easy to be damaged, the sampled tissue is more complete, which is conducive to the analysis of the sampled tissue, thereby facilitating the treatment of the patient.

[0088] In addition, the direction adjustment body 600 has the function of limiting the rotation of the pliers body 100 along the first rotation direction, that is, when the pliers body 100 rotates along the first rotation direction and fully engages with the base 200, the pliers body 100 just abuts against the direction adjustment body 600, avoiding the pliers body 100 from excessively rotating along the first rotation direction, which saves surgical time, improves surgical efficiency, and reduces labor intensity. Obviously, when the pliers body 100 abuts against the direction adjustment body 600, the extension direction of the pliers body 100 can be set to be exactly the same as the extension direction of the base 200, that is, this state is a state of complete engagement of the pliers body 100 and the base 200.

[0089] In this embodiment, optionally, the driving body 300 may be a belt-shaped structure. Obviously, the driving body 300 may also be a columnar or filamentary structure.

[0090] Furthermore, the driving body 300 is an elastic member, and the driving body 300 is made of stainless steel. When a force is applied to the driving body 300 to drive the pliers 100 to rotate, the angle of the bent portion 310 formed at the position where the driving body 300 contacts the direction adjustment body 600 will change continuously. Since the driving body 300 has a certain elastic deformation capacity, the driving body 300 is not easy to interfere with the direction adjustment body 600, and the driving body 300 can smoothly drive the pliers 100 to rotate. At the same time, the driving body 300 has a tendency to make the pliers 100 rotate relative to the base 200 along the second rotation direction, that is, when the external force applied to the driving body 300 is withdrawn, the driving body 300 has an elastic force to restore the deformation, so that the pliers 100 always remains in an open state.

[0091] In other embodiments, the driving body 300 may be a flexible member, and at the same time, a reset member (not shown) is sleeved on the first rotating shaft 400, and the reset member may be a torsion spring, and the two force arms of the torsion spring are respectively connected to the pliers body 100 and the base body 200, so that the pliers body 100 has a tendency to rotate relative to the base body 200 along the second rotation direction, that is, after the external force is removed, the pliers body 100 can be restored to an open state under the action of the torsion spring. In addition, since a blocking portion 231 is provided on the base body 200, when the pliers body 100 rotates along the second rotation direction to an open state, the pliers body 100 can abut against the blocking portion 231, thereby limiting the rotation range of the pliers body 100, so that the pliers body 100 always remains at a set position.

[0092] In other embodiments, the driving body 300 can be configured as a structure that can transmit both pulling force and pushing force, that is, the pliers body 100 can be configured to not have the ability to automatically restore to an open state. After the pliers body 100 and the base 200 are engaged, a pushing force is applied to the driving body 300, and the driving body 300 can drive the pliers body 100 to rotate along the second rotation direction to an open state.

[0093] The tissue sampling mechanism 002 provided in this embodiment can adjust the relative position of the forceps body 100 and the base 200 before the operation, so that the forceps body 100 is approximately 180 degrees with the base 200 when it is opened. At this time, the forceps body 100 and the base 200 form a long strip structure with a small volume, which is convenient for being placed in the tissue cavity along the extension direction of the tissue cavity, and the base 200 can be rotated so that the first actuator 110 on the forceps body 100 faces the tissue wall. When performing tissue sampling, the forceps body 100 is rotated relative to the base 200 along the first rotation direction by pulling the driving body 300. Since the base 200 is provided with a groove 240, the forceps body 100 can enter the groove 240 from the second opening side 242 of the groove 240, and the outer wall of the forceps body 100 and the groove wall of the groove 240 form a structure similar to scissors to shear and separate the tissue. Moreover, after the pliers body 100 is inserted into the groove 240 , only a small portion of the outer wall of the pliers body 100 is exposed outside the groove 240 , so the overall volume is small, the required space is small, and the adaptability is strong.

[0094] It should be noted that, before the operation, the forceps body 100 can always be in an open state, and can be pulled by the driving body 300 to rotate to close with the base 200. At the same time, the angle between the forceps body 100 and the base 200 when the forceps body 100 is opened may not be limited to 180°, and may be less than 180° or greater than 180°. In other words, when the forceps body 100 rotates relative to the base 200, the rotation angle range of the forceps body 100 is 0°-300°.

[0095] See also Fig. 9 This embodiment also provides a biopsy forceps 001, including the tissue sampling mechanism 002 mentioned in the above embodiment.

[0096] Optionally, the biopsy forceps 001 further includes a handle mechanism 700, which includes a fixing member 710, a sliding member 720, a spring tube 730 and a pull cable 740. The fixing member 710 and the sliding member 720 can be slidably matched, for example, the sliding member 720 is sleeved outside the fixing member 710, and the sliding member 720 and the fixing member 710 are relatively fixed in the circumferential direction of the fixing member 710, so that the sliding member 720 can only slide back and forth linearly relative to the fixing member 710. The spring tube 730 is connected to the distal end of the sliding member 720. The proximal end of the cable 740 is connected to the distal end of the sliding member 720, and the distal end of the cable 740 is connected to the driving body 300. When the sliding member 720 is operated to slide relative to the fixing member 710, the external force is transmitted to the driving body 300 through the cable 740. The driving body 300 can drive the pliers body 100 to rotate relative to the base 200, so that the pliers body 100 in the open state is engaged with the base 200, or the pliers body 100 in the closed state is opened relative to the base 200.

[0097] Furthermore, a wristband 750 may be provided on both the fixing member 710 and the sliding member 720 to facilitate the operator to hold the fixing member 710 and the sliding member 720 .

[0098] The biopsy forceps 001 provided in this embodiment can be used in conjunction with an endoscope. The tissue sampling mechanism 002 is placed in the body at the location to be sampled using the endoscope, and then tissue sampling is performed under the field of view of the endoscope. At the same time, when the biopsy forceps 001 is placed in the body, the extension direction of the entire instrument is roughly parallel to the tissue cavity. By adjusting the first actuator 110 of the forceps body 100, the first actuator 110 faces the tissue wall. By rotating the first actuator 110, the first actuator 110 digs out part of the tissue on the tissue wall. The dug tissue moves with the first actuator 110, and when the first actuator 110 and the second actuator 243 are engaged, the tissue is separated, and the tissue clamped between the first actuator 110 and the second actuator 243 is the tissue sample. Withdraw the biopsy forceps 001 to complete the sampling of the tissue sample.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tissue sampling mechanism (002), characterized in that: include: A pliers body (100), a base (200) and a driving body (300), wherein the base (200) is provided with a rotating connection portion, the pliers body (100) is rotatably connected to the rotating connection portion, the pliers body (100) has a first occlusal side (1001) at the rear in a first rotation direction, the first occlusal side (1001) is provided with a first actuator (110), the base (200) has a second occlusal side (201) at the front in the first rotation direction, the second occlusal side (110) is provided with a first actuator (110), A second actuator (243) is provided on the coupling side (201), and the second actuator (243) is located on a side of the rotating connection portion close to the proximal end of the base (200); the first actuator (110) can rotate along a second rotation direction opposite to the first rotation direction to a side of the rotating connection portion away from the proximal end of the base (200); the driving body (300) is connected to the pliers body (100) and is used to drive the pliers body (100) to rotate relative to the base (200); The base body is provided with a groove, the second executing part is located on the groove wall of the groove, and the first executing part can be embedded in the groove when rotating along the first rotation direction.

2. The tissue sampling mechanism (002) according to claim 1, characterized in that: The pliers body (100) has a proximal end and a distal end opposite to each other, the proximal end of the pliers body (100) is rotatably connected to the base body (200) via the rotating connection portion, and the connection position between the driving body (300) and the pliers body (100) is located between the distal end of the pliers body (100) and the rotating connection portion.

3. The tissue sampling mechanism (002) according to claim 1, characterized in that: The driving body (300) is detachably connected to the clamp body (100).

4. The tissue sampling mechanism (002) according to claim 1, characterized in that: The first execution part (110) comprises a plurality of meshing teeth arranged in series.

5. The tissue sampling mechanism (002) according to claim 4, characterized in that: The plurality of meshing teeth include a first meshing tooth (111), a second meshing tooth (112) and a third meshing tooth (113) arranged in sequence, wherein the first meshing tooth (111) and the third meshing tooth (113) are arranged at intervals in the axial direction of the rotating connection portion, and the second meshing tooth (112) is located between the first meshing tooth (111) and the third meshing tooth (113).

6. The tissue sampling mechanism (002) according to claim 5, characterized in that: The first engaging side (1001) is provided with a receiving groove (123), and a portion of the receiving groove (123) is located in a region surrounded by the first engaging tooth (111), the second engaging tooth (112) and the third engaging tooth (113).

7. The tissue sampling mechanism (002) according to claim 1, characterized in that: The base (200) comprises a mounting tube (210) and two mounting arms (220), wherein the two mounting arms (220) are connected to the proximal end of the mounting tube (210) and are arranged opposite to each other, and the pliers body (100) is located between the two mounting arms (220) and is rotatably connected to the two mounting arms (220) via the rotating connection portion.

8. The tissue sampling mechanism (002) according to claim 7, characterized in that: The base (200) further comprises a blocking block (230), wherein the blocking block (230) is connected to the mounting tube (210) and is located between the two mounting arms (220), and an end surface of the blocking block (230) away from the mounting tube (210) and an end surface of the mounting arm (220) away from the mounting tube (210) are spaced apart from each other; the blocking block (230) is used to abut against the pliers body (100) when the pliers body (100) rotates along the second rotation direction, so as to limit the rotation angle of the pliers body (100) relative to the base (200) along the second rotation direction.

9. The tissue sampling mechanism (002) according to claim 7 or 8, characterized in that: The caliper body (100) comprises a connecting portion (1002) and an assembly portion (120) connected to each other, the width of the connecting portion (1002) in the axial direction of the rotating connecting portion is smaller than the width of the assembly portion (120) in the axial direction of the rotating connecting portion, and the connecting portion (1002) is located between the two mounting arms (220) and is rotatably connected to the two mounting arms (220) via the rotating connecting portion; The first executing part (110) is arranged on the assembling part (120).

10. A biopsy forceps (001), characterized in that: The biopsy forceps (001) comprises: The tissue sampling mechanism (002) according to any one of claims 1 to 9.

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