A sampling forceps

Abstract

The present application relates to the field of medical device technology, and more particularly to a sampling forceps. The sampling forceps comprise a forceps head assembly, a pull rod assembly, and a handle. The forceps head assembly comprises a forceps head and a forceps head holder. The pull rod assembly comprises an outer tube, a control line extending through the outer tube and connected to the handle, and a control rod sheathed within the forceps head holder. The distal end of the control rod is in linkage control connection with the forceps head to control the opening and closing of the forceps head. The distal end of the control line is movably connected to the proximal end of the control rod. The sampling forceps provided by the present application solve the technical problems of existing sampling forceps, such as the difficulty in operation and the unsmooth opening and closing.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a sampling forceps. Background Art

[0002] With the development of medical technology, endoscopic surgery, as a new type of surgery with advantages such as small surgical incision and less pain for patients, is becoming increasingly popular among doctors and patients. Sampling forceps are an essential tool in clinical endoscopic examinations, enabling a minimally invasive and painless examination process, leading to their widespread use. When doctors or patients wish to perform pathological examinations on lesions within the cavity, sampling forceps can reach the lesion through the endoscopic channel and clamp the diseased tissue for pathological examination.

[0003] The sampling forceps mainly includes a handle at the proximal end, a clamp head assembly at the distal end, and a control line connecting the handle and the clamp head assembly. During surgery, the sampling forceps can be opened or closed by controlling the handle to collect biopsy samples. However, in existing sampling forceps, the control rod connected to the distal end of the control line and the clamp head are mostly hinged or hooked, that is, a four-bar linkage or hook mechanism. This makes it impossible for the control line and the clamp head to rotate relative to each other. Users have found in clinical diagnosis and treatment that when operating the sampling forceps handle to open or close the sampling forceps, the sampling forceps are not opened and closed smoothly. Especially during colonoscopy, the sampling forceps are long and have a large bending degree during operation. At this time, the torque generated is large, and the opening and closing of the sampling forceps are obviously not smooth and difficult to operate, which also makes patients feel that the experience is not good. Summary of the Invention

[0004] The purpose of the present application is to provide a sampling forceps to solve the technical problems of difficult operation and non-smooth opening and closing of the sampling forceps.

[0005] The present application provides a sampling forceps, comprising a forceps head assembly at a distal end and a handle at a proximal end, and a pull rod assembly connecting the forceps head assembly and the handle. The forceps head assembly comprises a forceps head and a forceps head seat for fixing the forceps head. The pull rod assembly comprises an outer tube and a control line passing through the outer tube and connected to the handle.

[0006] The pull rod assembly also includes a control rod sleeved in the clamp head seat, the distal end of the control rod is linked to the clamp head for controlling the opening and closing of the clamp head.

[0007] The distal end of the control line is movably connected to the proximal end of the control rod.

[0008] Furthermore, a connecting through hole is provided at the proximal end of the control rod;

[0009] The distal end of the control line has a convex head, the convex head is movably connected to the proximal end of the control rod, and the maximum radial dimension of the convex head is greater than the maximum aperture of the connecting through hole;

[0010] A limit baffle is provided inside the control rod and / or at the distal end of the control line to limit the movement of the convex head within a range.

[0011] Furthermore, the proximal end of the control rod includes a limit baffle protruding from the inner wall thereof and extending into the tube.

[0012] A cavity for accommodating the convex portion is formed between the limiting baffle and the connecting through hole, and a gap is left between the limiting baffle and the convex portion so that the convex portion can be movably connected in a gap fit within the cavity.

[0013] Furthermore, the maximum distance between the protruding end of the limit baffle and the inner wall of the control rod opposite thereto is smaller than the maximum radial dimension of the convex portion; or

[0014] The limiting baffle is an annular structure, and the aperture size enclosed by it is smaller than the maximum radial size of the convex part; or

[0015] The limit baffle includes at least two baffles arranged along the circumference of the inner wall of the control rod, and the aperture size surrounded by the protruding ends of each baffle is smaller than the maximum radial size of the convex part.

[0016] Furthermore, the limit baffles are arranged along the radial direction of the inner tube of the control rod.

[0017] Furthermore, the limit baffle is a plate-like structure with a triangular cross-section protruding from the middle toward the distal end; or

[0018] The limiting baffle is in the shape of a flat plate surface.

[0019] Furthermore, the distal side wall of the control line is provided with the limiting baffle protruding along its periphery, and a distance is left between the limiting baffle and the proximal end face of the convex head portion. The connecting through hole passes through the control line and limits movement within the range of the distance.

[0020] Furthermore, the proximal end of the control rod is connected with an insert, the insert is penetrated by the connecting through hole, and the outer periphery of the insert is fixedly connected to the inner part of the proximal end of the control rod.

[0021] Furthermore, the convex head is in any one of a spherical shape, an ellipsoidal shape, a truncated cone shape, a conical shape, a cylindrical shape, an irregular spherical shape, an irregular truncated cone shape, an irregular cylindrical shape, etc.

[0022] Furthermore, the distal side wall of the control rod is provided with a first through hole and a second through hole opposite to each other.

[0023] The pliers head includes a first pliers head arm and a second pliers head arm that can be opened and closed. The proximal arms of the first pliers head arm and the second pliers head arm are respectively provided with a first slide groove and a second slide groove along the extension direction of the pliers head. The first connecting member passes through the first through hole and the second through hole and is slidably connected to the first slide groove and the second slide groove.

[0024] The handle includes a fixed core rod and a control slider. The fixed core rod is provided with a third slide groove along its extension direction. The control slider is slidably connected to the third slide groove.

[0025] The proximal end of the control line is connected to the control slider, the proximal end of the outer tube is connected to the fixed core rod, and the distal end of the outer tube is fixedly connected to the proximal end of the clamp head seat.

[0026] Compared with the prior art, the distal end of the control wire of the sampling forceps provided in the present application is movably connected to the proximal end of the control rod. In this way, when the control wire drives the control rod to control the opening and closing of the clamp head of the sampling forceps, especially when operating in a colonoscope with a large bend, the sampling forceps often bends greatly. The control wire and the control rod are movably connected, and the control wire can release the torque generated by the bending through active rotation, making the sampling forceps effortless to operate and smoother to open and close. At the same time, it saves sampling time, improves sampling efficiency, and enhances the patient's experience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic structural diagram of the closed state of the sampling clamp provided in an embodiment of the present application;

[0029] Figure 2 This is a structural diagram of the sampling clamp provided in an embodiment of the present application in an open state;

[0030] Figure 3 A schematic diagram of a portion of the structure of the sampling forceps provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of the clamp head seat provided in an embodiment of the present application;

[0032] Figure 5A schematic diagram of the structure of a control lever provided in an embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of the clamp head provided in an embodiment of the present application;

[0034] Figure 7 A schematic structural diagram of the first clamp arm provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of a control line provided in one embodiment of the present application;

[0036] Figure 9 A schematic diagram of the structure of a control line provided in another embodiment of the present application;

[0037] Figure 10 The schematic diagram of the structure of the connection between the control line and the insert provided in the embodiment of the present application is as follows;

[0038] Figure 11 A schematic diagram of the structure of the connection between the clamp head assembly and the control rod provided in an embodiment of the present application;

[0039] Figure 12 This is a schematic diagram of the structure after the control rod provided in the embodiment of the present application is inserted into the clamp head seat and connected;

[0040] Figure 13 A cross-sectional view of an insert provided in an embodiment of the present application;

[0041] Figure 14 A cross-sectional view of a control rod provided in accordance with an embodiment of the present application;

[0042] Figure 15 A cross-sectional view of a control rod provided in another embodiment of the present application;

[0043] Figure 16 A cross-sectional view of a control rod provided in yet another embodiment of the present application;

[0044] Figure 17 A cross-sectional view of a control rod provided in yet another embodiment of the present application;

[0045] Figure 18 A schematic structural diagram of a control line provided in yet another embodiment of the present application;

[0046] Figure 19 A cross-sectional view of a control rod provided in yet another embodiment of the present application.

[0047] Reference numerals:

[0048] 10-clamp head assembly;

[0049] 11-Pliers head;

[0050] 111-first clamp arm;

[0051] 111a-first chute;

[0052] 111b-first hole position;

[0053] 112-second clamp arm;

[0054] 112a-second chute;

[0055] 12-Clamp head seat;

[0056] 121-first fixing through hole;

[0057] 122-second fixing through hole;

[0058] 20-tie rod assembly;

[0059] 21- outer tube;

[0060] 22-control line;

[0061] 221-convex head;

[0062] 23-control lever;

[0063] 231-connection through hole;

[0064] 232-cavity;

[0065] 233-Inlay;

[0066] 234-first through hole;

[0067] 235-second through hole;

[0068] 236-assembly hole;

[0069] 24-limit baffle;

[0070] 30-handle;

[0071] 31-Fixed core rod;

[0072] 311-third chute;

[0073] 32-control slider;

[0074] 33-Handheld Ring;

[0075] 41-first connecting member;

[0076] 42-Second connecting piece. DETAILED DESCRIPTION

[0077] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0078] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0079] 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.

[0080] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "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 product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element 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 application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0081] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply 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.

[0082] It should also be noted that, in the description of this application, 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; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0083] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0084] like Figures 1 to 3 As shown in FIG, an embodiment of the present application provides a sampling forceps for collecting biopsy samples from patients during endoscopic surgery. The sampling forceps includes a forceps head assembly 10 at the distal end and a handle 30 at the proximal end, as well as a pull rod assembly 20 connecting the forceps head assembly 10 and the handle 30. The forceps head assembly 10 includes a forceps head 11 and a forceps head seat 12 for fixing the forceps head 11. Figure 4 、 Figure 6 、 Figure 7 and Figure 12 As shown, the pliers 11 includes a first pliers arm 111 and a second pliers arm 112 that are opened and closed with each other, and the first pliers arm 111 and the second pliers arm 112 respectively have a first hole position 111b and a second hole position fixedly connected to the pliers base 12, and correspondingly, the pliers base 12 is respectively provided with a first fixing through hole 121 and a second fixing through hole 122 that match and connect with the first hole position 111b and the second hole position, and then the pliers 11 and the pliers base 12 are positioned and connected with a limited gap through the second connecting member 42 that passes through the first fixing through hole 121, the first hole position 111b, the second hole position and the second fixing through hole 122 in sequence. The second connecting member 42 can specifically be a fastener such as a pin fixed at both ends that plays the above-mentioned connecting and fixing role.

[0085] The aforementioned pull rod assembly 20 includes an outer tube 21 and a control line 22 that runs through the outer tube 21 and is connected to the fixed core rod 31 of the aforementioned handle 30. The aforementioned handle 30 includes the fixed core rod 31 and a control slider 32. The fixed core rod 31 has a third slot 311 along its extension direction. The control slider 32 is slidably connected to the third slot 311. The proximal end of the control line 22 is connected to the control slider 32. By manipulating the control slider 32 to move back and forth on the third slot 311, the opening and closing of the distal clamp head can be controlled. This joint control structure is convenient, simple, reliable and easy to operate. The proximal end of the outer tube 21 is fixedly connected to the fixed core rod 31, and the distal end of the outer tube 21 is fixedly connected to the proximal end of the aforementioned clamp head seat 12, thereby serving to fix the distal clamp head assembly and the proximal handle. In order to facilitate user operation, a handle ring 33 can be protruded from the outer wall of the control slider 32 and the outer wall of the fixed core rod 31. According to needs and for convenient operation, two handle rings 33 of the control slider 32 can be relatively provided.

[0086] like Figures 3 to 12As shown, the pull rod assembly 20 of the sampling pliers provided in the embodiment of the present application also includes a control rod 23 arranged in the aforementioned pliers head seat 12, and the distal end of the control rod 23 is linked to the aforementioned pliers head 11 for control. Specifically, the distal side walls of the control rod 23 are oppositely provided with a first through hole 234 and a second through hole 235, and the proximal arms of the aforementioned first pliers head arm 111 and the second pliers head arm 112 are respectively provided with a first slide groove 111a and a second slide groove 112a along the extension direction of the pliers head 11, and the first connecting member 41 passes through the first through hole 234 and the second through hole 235 and is slidably connected to the first slide groove 111a and the second slide groove 112a, and the proximal end of the control rod 23 is movably connected to the distal end of the control line 22.

[0087] Compared with the prior art, the distal end of the control wire 22 of the sampling forceps provided in the embodiment of the present application is movably connected to the proximal end of the control rod 23. In this way, when the control wire 22 drives the control rod 23 to control the opening and closing of the clamp head 11 of the sampling forceps, especially when operating in a colonoscope with a large curve, it is often encountered that the sampling forceps has a large bend. The control wire 22 and the control rod 23 are movably connected, and the control wire 22 can release the torque generated by the bending through active rotation, so that the sampling forceps is effortless to operate and the opening and closing are smoother. At the same time, it saves sampling time, improves sampling efficiency, and enhances the patient's experience of use.

[0088] A specific embodiment is that the proximal end of the aforementioned control rod 23 is provided with a connecting through hole 231, and the distal end of the control line 22 has a convex head 221, which is movably connected to the proximal end of the control rod 23. The maximum radial dimension of the convex head 221 is greater than the maximum aperture of the connecting through hole 231, so that the convex head 221 is blocked by the connecting through hole 231 and cannot be separated from the proximal end of the control rod 23 and is movably connected to the proximal end of the control rod 23. A limiting baffle 24 is provided inside the control rod 23 and / or at the distal end of the control line 22 to limit the movement of the convex head 221 within the movable range of the proximal end of the control rod 23, so that the control line 22 can be movably connected to the control rod 23, and the limiting connection can drive the control rod 23 to move back and forth in the clamp head seat 12 to smoothly realize the opening and closing operations of the clamp head 11.

[0089] Furthermore, the proximal end of the control line 22 is connected to the control slider 32 of the handle 30. The user manipulates the control slider 32 to move back and forth on the third slide 311, thereby driving the control line 22, the control rod 23, and the first connecting member 41 to move in the first slide 111a and the second slide 112a in turn, so as to control the opening and closing of the first clamp arm 111 and the second clamp arm 112, that is, to control the opening and closing of the clamp head 11. Similarly, the first connecting member 41 can also be a fastener such as a pin fixed at both ends to play a connecting and fixing role. Figure 8 and Figure 9 As shown, the shape of the convex portion 221 is not specifically limited and can be spherical, ellipsoidal, truncated cone, conical, cylindrical or irregular spherical, truncated cone, conical, cylindrical or other relatively rounded outer shapes.

[0090] A preferred embodiment is as follows Figure 4 and Figure 5 As shown, the proximal end of the control rod 23 may be provided with the aforementioned limit baffle 24, which protrudes from the inner wall and extends into the tube. A cavity 232 for accommodating the aforementioned protruding portion 221 is formed between the limit baffle 24 and the aforementioned connecting through hole 231. A gap is left between the limit baffle 24 and the protruding portion 221, so that the protruding portion 221 can be movably connected with a clearance fit within the cavity 232. The clearance fit not only limits the range of motion of the protruding portion 221, thereby allowing the control line 22 to drive the control rod 23 to move, but also allows the protruding portion 221 to be relatively stably connected, thereby improving its stability.

[0091] On the basis of the above embodiment, a specific embodiment is that the aforementioned limit baffle 24 is arranged along the radial direction of the inner tube of the aforementioned control rod 23, which is convenient for design and processing and has a stronger reliability of the limit interception function. Regarding the specific shape of the limit baffle 24, one possible implementation method is as follows: Figure 14 As shown, the limit baffle 24 can be a plate-like structure with a triangular cross-section protruding from the middle to the distal end, so that the gap of the aforementioned gap connection can be minimized as much as possible, while ensuring the movable connection of the aforementioned convex head 221 as much as possible, the stability of the poor connection can be maximized; another embodiment is as follows Figure 15 As shown, the limiting baffle 24 can be in the shape of a flat plate, which is more convenient to process and form.

[0092] Another specific embodiment is that the limit baffle 24 is not set in the entire diameter of the pipe. Compared with the above specific embodiment, this limit baffle 24 does not need to be set in the entire diameter of the pipe along the radial direction, which saves materials, is easy to process, and also facilitates the flow of the control rod 23 in the pipe. It can also achieve the function of limiting the range of movement of the protruding head 221. One possible implementation method is as follows Figure 16 As shown, the maximum distance between the protruding end of the limit baffle 24 and the inner wall of the control rod 23 opposite thereto is smaller than the maximum radial dimension of the convex portion 221, so as to limit the range of motion of the convex portion 221. Figure 17As shown, another possible implementation method is that the limit baffle 24 can be an annular structure, and the aperture size enclosed by it is smaller than the maximum radial size of the convex part 221, so as to achieve the effect of limiting the range of movement of the aforementioned convex part 221; another possible implementation method is that the limit baffle 24 includes at least two blocks protruding from the inner wall of the control rod 23, and the at least two blocks are arranged along the circumference of the inner wall of the control rod 23, and the aperture size enclosed by the protruding ends of the at least two blocks is smaller than the maximum radial size of the convex part 221, so as to achieve the effect of limiting the range of movement of the aforementioned convex part 221.

[0093] In order to limit the range of motion of the protruding portion 221, another preferred embodiment is as follows: Figure 18 and Figure 19 As shown, the distal sidewall of the control line 22 may be provided with a protruding stopper 24 along its outer periphery. A gap is left between the stopper 24 and the proximal end surface of the protruding portion 221, so that the protruding portion 221 of the control line 22 is limited in its range of motion within this gap. This approach, from another perspective, by providing the stopper 24 on the control line 22, can also serve to limit the range of motion of the protruding portion 221 at the distal end of the control line, while also making it easier to process. Specifically, the stopper 24 can be one or more blocks protruding from the distal sidewall of the control line 22, or a ring-shaped structure that is sleeved and snapped onto the distal sidewall of the control line 22.

[0094] Another preferred embodiment is as follows Figure 13 As shown, the proximal end of the control rod 23 can also be connected to an insert 233, the outer periphery of the insert 233 can be assembled and connected with the proximal inner portion of the control rod 23, and the two are fixedly connected. The insert 233 is penetrated by the aforementioned connecting through hole 231. Figures 14 to 17 As shown, the proximal end of the control rod 23 is provided with an assembly hole 236. The diameter of the assembly hole 236 is larger than the maximum radial dimension of the protruding portion 221, allowing the protruding portion 221 to pass through the assembly hole 236 and enter the cavity 232 within the proximal end of the control rod 23. The insert 233 allows the connecting hole 231 to be separably connected to the proximal end of the control rod 23. Due to the high frequency of use and concentrated stress of the connecting hole, it is more susceptible to damage than other parts. The separable connection structure facilitates the replacement of individual parts, increases the service life of the entire product, improves its cost-effectiveness, and reduces costs over long-term use.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sampling forceps, comprising a distal clamp assembly and a proximal handle, and a pull rod assembly connecting the clamp assembly and the handle, wherein the clamp assembly comprises a clamp head and a clamp head seat for fixing the clamp head, and the pull rod assembly comprises an outer tube and a control line passing through the outer tube and connected to the handle, characterized in that: The pull rod assembly also includes a control rod sleeved in the clamp head seat, the distal end of the control rod is linked to the clamp head for controlling the opening and closing of the clamp head. The distal end of the control line is movably connected to the proximal end of the control rod; A connecting through hole is formed at the proximal end of the control rod; The distal end of the control line has a convex head, which is movably connected to the proximal end of the control rod. The maximum radial dimension of the convex head is larger than the maximum aperture of the connecting through hole, so that the convex head is blocked by the connecting through hole and cannot be separated from the proximal end of the control rod and is movably connected to the proximal end of the control rod. A limit baffle is provided inside the control rod and / or at the far end of the control line to limit the movement of the convex head within a range, so that the control line and the control rod can be movably connected while also being limited in position. The handle can drive the control rod to move back and forth in the clamp head seat to realize the opening and closing operation of the clamp head.

2. The sampling forceps according to claim 1, characterized in that The proximal end of the control rod includes the limit baffle protruding from the inner wall thereof and extending into the tube. A cavity for accommodating the convex portion is formed between the limiting baffle and the connecting through hole, and a gap is left between the limiting baffle and the convex portion so that the convex portion can be movably connected in a gap fit within the cavity.

3. The sampling forceps according to claim 2, characterized in that The maximum distance between the protruding end of the limit stopper and the inner wall of the control rod opposite thereto is smaller than the maximum radial dimension of the convex portion; or The limiting baffle is an annular structure, and the aperture size enclosed by it is smaller than the maximum radial size of the convex part; or The limit baffle includes at least two baffles arranged along the circumference of the inner wall of the control rod, and the aperture size surrounded by the protruding ends of each baffle is smaller than the maximum radial size of the convex part.

4. The sampling forceps according to claim 2, characterized in that: The limiting baffles are arranged along the radial direction of the inner tube of the control rod.

5. The sampling forceps according to claim 4, characterized in that The limit baffle is a plate-like structure with a triangular cross-section protruding from the middle toward the distal end; or The limiting baffle is in the shape of a flat plate surface.

6. The sampling forceps according to claim 1, characterized in that: The distal side wall of the control line is provided with the limiting baffle protruding along its outer circumference, and a distance is left between the limiting baffle and the proximal end surface of the convex head. The connecting through hole passes through the control line and is limited to move within the range of the distance.

7. The sampling forceps according to claim 2, characterized in that: The proximal end of the control rod is connected with an insert, the insert is penetrated by the connecting through hole, and the outer periphery of the insert is fixedly connected to the inner part of the proximal end of the control rod.

8. The sampling forceps according to claim 1, characterized in that: The convex head is in any one of a spherical shape, an ellipsoidal shape, a truncated cone shape, a conical shape, a cylindrical shape, an irregular spherical shape, an irregular truncated cone shape, an irregular cylindrical shape, etc.

9. The sampling forceps according to claim 1, characterized in that: The distal side wall of the control rod is provided with a first through hole and a second through hole opposite to each other. The pliers head includes a first pliers head arm and a second pliers head arm that can be opened and closed. The proximal arms of the first pliers head arm and the second pliers head arm are respectively provided with a first slide groove and a second slide groove along the extension direction of the pliers head. The first connecting member passes through the first through hole and the second through hole and is slidably connected to the first slide groove and the second slide groove. The handle includes a fixed core rod and a control slider. The fixed core rod is provided with a third slide groove along its extension direction. The control slider is slidably connected to the third slide groove. The proximal end of the control line is connected to the control slider, the proximal end of the outer tube is connected to the fixed core rod, and the distal end of the outer tube is fixedly connected to the proximal end of the clamp head seat.

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