Biopsy forceps feeding depth prompting device

Abstract

The utility model provides a biopsy forceps feeding depth prompting device. The biopsy forceps feeding depth prompting device comprises a guide sleeve, a lateral jacking assembly and a damping sleeve. The jacking piece is telescopically installed in the lateral jacking assembly through the elastic piece, the damping sleeve is suitable for being arranged on the forceps rod in a sleeving mode, and when the damping sleeve makes contact with one end of the jacking piece, perceptible movement resistance rise can be generated. During use, one end of the guide sleeve is mounted at an inlet of biopsy forceps, the damping sleeve is sleeved at a preset position of a forceps rod, then medical staff insert the biopsy forceps into an endoscope channel, and when sensing that resistance is increased, the medical staff slows down the insertion speed and alerts whether a forceps head extends out of an outlet of the endoscope channel or not. According to the utility model, in the process of inserting the biopsy forceps by medical personnel, the insertion speed can be properly accelerated before sensing the rise of resistance, and the insertion speed can be slowed down and the vigilance can be improved after sensing the rise of resistance, so that the insertion efficiency of the biopsy forceps can be improved, and the forceps head of the biopsy forceps can be prevented from suddenly extending out of an endoscope channel for a large length.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically to a biopsy forceps feed depth indicator device. Background Technology

[0002] An endoscope is a medical device that can enter the body through natural cavities or artificially created channels to examine and treat diseases. Common examples include gastroscopes and bronchoscopes. Endoscopic biopsy refers to a procedure where, after the endoscope or similar device enters the body, if the doctor observes suspected lesions in the digestive tract mucosa and deems further sampling necessary, a sample of tissue is taken using biopsy forceps and then sent for pathological examination.

[0003] In the medical field, endoscopic examination and the use of biopsy forceps to collect tissue samples are extremely common and crucial procedures. When a doctor discovers a suspected lesion during an endoscopic examination of a patient, one hand typically operates the control lever of the endoscope to control its forward, backward, and rotation movements, while the other hand operates the biopsy forceps to move within the endoscope channel. Once the forceps tip is accurately positioned on the tissue to be collected, the forceps tip is used to grasp the tissue for biopsy.

[0004] During the insertion of biopsy forceps into the endoscope channel, doctors cannot precisely sense the position of the forceps tip; they typically rely on their experience to determine the insertion depth. Different doctors have different operating habits and experience levels. Some doctors insert the forceps too quickly, and without precise knowledge of the insertion depth, the forceps tip may suddenly protrude a considerable length from the endoscope, potentially damaging the digestive tract mucosa. Minor damage may cause mucosal bleeding, while severe damage can lead to digestive tract perforation, resulting in a series of serious complications such as acute peritonitis, posing a significant threat to the patient's life and health.

[0005] Therefore, there is a need for a device that can accurately indicate to the operator that the biopsy forceps have been inserted to a predetermined length during endoscopic biopsy procedures, thereby improving the accuracy and safety of endoscopic biopsy procedures. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the technical defect in the prior art where doctors cannot clearly perceive the position of the biopsy forceps tip when inserting them into the endoscope channel. This leads to the tip of the biopsy forceps easily protruding a long length from the endoscope when the insertion speed is fast, which may damage the digestive tract mucosa. Therefore, this invention provides a prompting device that can accurately indicate to the operator that the biopsy forceps have been inserted to a predetermined length during endoscopic biopsy operations, thereby improving the accuracy and safety of endoscopic biopsy operations.

[0007] Therefore, this utility model provides a biopsy forceps feed depth indication device, comprising:

[0008] A guide sleeve, one end of which is adapted to be fixedly installed at the biopsy forceps inlet of the endoscope handle via a connecting structure, and has a guide channel inside that communicates with the biopsy forceps inlet;

[0009] A lateral clamping assembly is disposed on the outer wall of the guide sleeve, comprising a body having an internal installation space and a pressing member that is retractably installed in the installation space by means of an elastic element; the installation space is connected to the guide channel, and one end of the pressing member can extend into the guide channel under the action of the elastic element, and always has a tendency to press against the center inside the guide channel;

[0010] A damping sleeve is suitable for being fitted onto the bar of a biopsy forceps. It can move with the bar and enter the guide channel. When the damping sleeve moves to contact one end of the pressure member, the frictional resistance between the pressure member and the damping sleeve increases significantly.

[0011] Furthermore: a contact is provided at one end of the top pressing member, and multiple annular ribs are provided axially at intervals on the outer wall of the damping sleeve; when the damping sleeve moves to the point where the annular ribs contact the contact, the contact can generate significantly increased resistance to the further movement of the damping sleeve through the annular ribs.

[0012] Preferably, the contact and / or the annular rib is made of rubber or silicone.

[0013] Furthermore: the cross-sectional shape of the contact is arc-shaped, triangular, or trapezoidal, and the cross-sectional shape of the annular rib is arc-shaped, triangular, or trapezoidal;

[0014] Further: the connection structure includes:

[0015] A clamp is provided at one end of the guide sleeve and has a strip-shaped opening that is opened along the axial direction. Two vertical plates are provided opposite to each other on the outer side wall of the clamp on both sides of the strip-shaped opening. One vertical plate is provided with a threaded hole and the other vertical plate is provided with a smooth hole opposite to the threaded hole.

[0016] An adjusting bolt is adapted to pass through the light hole and then be screwed into the threaded hole.

[0017] Furthermore: the hoop is provided with an anti-slip bushing inside;

[0018] Preferably, the inner wall of the anti-slip bushing is provided with anti-slip texture;

[0019] Preferably, the anti-slip bushing is made of rubber or silicone.

[0020] Furthermore, the elastic element is a spring, which is compressed and installed between the other end of the top pressure member and the bottom of the body.

[0021] Furthermore, a positioning rod is provided at the other end of the pressing member, and the positioning rod is inserted inside the spring.

[0022] Further: the body includes:

[0023] The mounting sleeve has one end connected to the outer wall of the guide sleeve and the other end provided with an installation port;

[0024] The pressure regulating component is axially movable and mounted on the other end of the mounting sleeve via a mounting structure. It includes a pressure regulating rod and an adjusting knob located at one end of the pressure regulating rod. The adjusting knob is located outside the mounting sleeve. The other end of the pressure regulating rod extends into the interior of the mounting sleeve through the mounting port, and its end abuts against the end of the spring away from the top pressure component.

[0025] Furthermore, the mounting structure includes an internal thread on the inner wall of the other end of the mounting sleeve and an external thread on the pressure adjusting rod that can be screwed into the internal thread.

[0026] Furthermore, it also includes a limiting structure, which includes a first limiting structure disposed on the inner wall of one end of the mounting sleeve and a second limiting structure disposed on the outer wall of the top pressing member; the first limiting structure and the second limiting structure cooperate to axially limit the top pressing member.

[0027] The technical solution provided by this utility model has the following advantages:

[0028] This utility model discloses a biopsy forceps feed depth indicator, comprising a guide sleeve, a lateral clamping assembly, and a damping sleeve. One end of the guide sleeve is adapted to be fixedly installed at the biopsy forceps inlet of the endoscope handle via a connecting structure, and has a guide channel communicating with the biopsy forceps inlet inside. The lateral clamping assembly is disposed on the outer wall of the guide sleeve and includes a body with an internal installation space and a pressing member that is retractably installed in the installation space via an elastic element. The installation space is connected to the guide channel, and one end of the pressing member can extend into the guide channel under the action of the elastic element, and always has a tendency to press against the center inside the guide channel. The damping sleeve is adapted to be sleeved on the forceps bar of the biopsy forceps, and can move with the forceps bar and enter the guide channel. When the damping sleeve moves to contact one end of the pressing member, it can generate a perceptible increase in moving resistance.

[0029] In use, first ensure the biopsy forceps inlet on the endoscope handle is unobstructed. Then, fix one end of the guide sleeve to the biopsy forceps inlet on the endoscope handle using a connecting structure, ensuring unobstructed access between the guide channel and the biopsy forceps inlet on the endoscope handle. Place the damping sleeve on the predetermined position of the forceps bar. This predetermined position can be determined based on the patient's examination site and the experience of the medical staff, ensuring that the forceps head has not extended (or is about to extend) into the endoscope channel while the damping sleeve has already contacted one end of the pressure member and generated a perceptible increase in moving resistance. Then, the medical staff operates the biopsy forceps to move in the endoscope channel (the insertion speed can be slightly faster at this time). When the medical staff clearly feels the increase in moving resistance on the forceps bar, it indicates that the forceps head has been inserted to the predetermined length. At this time, the medical staff should slow down the insertion speed and pay close attention to whether the forceps head is protruding from the endoscope channel outlet. After the forceps head is accurately positioned on the tissue to be collected and has grasped the tissue, pull the biopsy forceps outward.

[0030] This invention relates to a biopsy forceps depth indication device. Medical personnel can determine the appropriate indication position by placing the damping sleeve on the forceps bar at a predetermined location based on the patient's examination site, their own operating habits, and clinical experience. Before sensing increased resistance (i.e., before the damping sleeve contacts the pressure end), medical personnel can appropriately increase the insertion speed of the biopsy forceps, thereby improving examination efficiency. Once increased resistance is sensed (i.e., the damping sleeve contacts the pressure end), medical personnel should slow down the insertion speed and be more vigilant, thus preventing the forceps head from suddenly extending a long distance out of the endoscope channel, thereby preventing damage to the patient's digestive tract mucosa. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0032] Figure 1 This is a schematic diagram of the overall structure of the biopsy forceps feed depth indication device of this utility model.

[0033] Figure 2 This is an exploded view of the biopsy forceps feed depth indication device of this utility model.

[0034] Figure 3 It is a sectional view of the lateral clamping component and its installation position.

[0035] Reference numerals: 01, biopsy forceps; 011, forceps bar; 012, forceps head; 1, guide sleeve; 100, guide channel; 11, clamp; 111, strip opening; 112, upright plate; 1121, threaded hole; 1122, clear hole; 12, adjusting bolt; 2, lateral clamping assembly; 200, installation space; 21, elastic element; 22, pressing element; 221, contact; 222, second limiting structure; 223, positioning rod; 23, mounting sleeve; 230, mounting port; 231, first limiting structure; 24, pressure adjusting element; 241, pressure adjusting rod; 242, adjusting knob; 3, damping sleeve; 31, annular rib. Detailed Implementation

[0036] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0037] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0038] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This embodiment provides a biopsy forceps feed depth indication device, such as... Figure 1-3 As shown, the device includes a guide sleeve 1, a lateral clamping assembly 2, and a damping sleeve 3. One end of the guide sleeve 1 is adapted to be fixedly installed at the biopsy forceps inlet of the endoscope handle via a connecting structure, and has a guide channel 100 communicating with the biopsy forceps inlet inside. The lateral clamping assembly 2 is disposed on the outer wall of the guide sleeve 1, and includes a body having an internal installation space 200 and a pressing member 22 that is retractably installed in the installation space 200 via an elastic member 21. The installation space 200 communicates with the guide channel 100, and one end of the pressing member 22 can extend into the guide channel 100 under the action of the elastic member 21, and always has a tendency to press against the center inside the guide channel 100. The damping sleeve 3 is adapted to be sleeved on the forceps bar of the biopsy forceps, and can move with the forceps bar and enter the guide channel 100. When the damping sleeve 3 moves to contact one end of the pressing member 22, the frictional resistance between the pressing member 22 and the damping sleeve 3 increases significantly.

[0041] In this embodiment, the damping sleeve 3 can be fitted onto the forceps bar 011 of the biopsy forceps 01 and fixed relative to the forceps bar 011. The thickness of the damping sleeve 3 can be set to be thinner, and it is best to make the inner diameter of the guide sleeve 1 slightly larger than the outer diameter of the damping sleeve 3. After the damping sleeve 3 contacts one end of the pressure member 22, the medical staff can clearly feel that the resistance to inserting the forceps bar 011 increases, and it is necessary to slightly increase the insertion force to ensure that the forceps bar 011 overcomes the resistance and continues to be inserted. When pulling out the forceps bar 011, after one end of the pressure member 22 contacts the damping sleeve 3, the resistance may increase or may not increase. In use, first ensure the biopsy forceps inlet on the endoscope handle is unobstructed. Then, fix one end of the guide sleeve 1 to the biopsy forceps inlet on the endoscope handle via the connecting structure, ensuring the guide channel 100 is unobstructed from the biopsy forceps inlet on the endoscope handle. Place the damping sleeve 3 on the predetermined position of the forceps bar 011. This predetermined position can be determined based on the patient's examination site and the experience of medical personnel to ensure that the forceps head 012 of the biopsy forceps 01 has not extended (or is about to extend) from the endoscope channel while the damping sleeve 3 is already engaged with the pressure member 22. The insertion point is determined by the contact of one end with the biopsy forceps 01 and the resulting increase in perceptible resistance. The medical staff then moves the biopsy forceps 01 within the endoscope channel (the insertion speed can be slightly faster at this point). When the medical staff clearly feels an increase in resistance on the forceps handle 011, it indicates that the forceps head 012 has been inserted to the predetermined length. At this point, the medical staff slows down the insertion speed and constantly monitors whether the forceps head 012 is protruding from the endoscope channel exit. Once the forceps head 012 is accurately positioned on the tissue to be collected and has grasped the tissue, the biopsy forceps 01 can be pulled out. During the removal of the biopsy forceps 01, the guide sleeve 1 can be removed from the biopsy forceps inlet on the endoscope handle to prevent the forceps head 012, which contains human tissue, from passing through the guide channel 100.

[0042] In this embodiment, the biopsy forceps insertion depth indicator allows medical personnel to select a suitable indication position by placing the damping sleeve 3 on the predetermined position of the forceps bar 011, based on the patient's examination site, their own operating habits, and clinical experience. Before sensing an increase in movement resistance (i.e., before the damping sleeve 3 contacts one end of the pressure member 22), the insertion speed of the biopsy forceps 01 can be appropriately increased to improve examination efficiency. When an increase in movement resistance is sensed (i.e., the damping sleeve 3 contacts one end of the pressure member 22), the medical personnel slow down the insertion speed and become more vigilant, thereby preventing the forceps head 012 from suddenly extending a long distance out of the endoscope channel, thus preventing damage to the patient's digestive tract mucosa.

[0043] The biopsy forceps feed depth indication device in this embodiment, such as Figure 3As shown, one end of the pressing member 22 is provided with a contact 221, and a plurality of annular ribs 31 are provided axially at intervals on the outer side wall of the damping sleeve 3; when the damping sleeve 3 moves to the point where the annular ribs 31 contact the contact 221, the contact 221 can generate significantly increased resistance to the further movement of the damping sleeve 3 through the annular ribs 31; preferably, the contact 221 / or the annular ribs 31 are made of rubber or silicone.

[0044] In this embodiment, the width of the contact 221 along the axial direction of the guide channel 100 can be set to be slightly smaller than the distance between the top ends of two adjacent annular ribs 31, so that after the contact 221 contacts the damping sleeve 3, it can at least partially insert between the two adjacent annular ribs 31. The materials of the contact 221 and the damping sleeve 3 can be selected according to actual needs, so as not to affect the surgical examination.

[0045] In this embodiment of the biopsy forceps feed depth indicator device, the cross-sectional shape of the contact 221 is arc-shaped, triangular or trapezoidal, and the cross-sectional shape of the annular rib 31 is arc-shaped, triangular or trapezoidal.

[0046] The biopsy forceps feed depth indication device in this embodiment, such as Figure 2 As shown, the connecting structure includes a clamp 11 and an adjusting bolt 12. The clamp 11 is disposed at one end of the guide sleeve 1 and has a strip-shaped opening 111 opened along the axial direction. Two upright plates 112 are disposed opposite each other on the outer side wall of the clamp 11 on both sides of the strip-shaped opening 111. One upright plate 112 is provided with a threaded hole 1121, and the other upright plate 112 is provided with a smooth hole 1122 opposite to the threaded hole 1121. The adjusting bolt 12 is adapted to pass through the smooth hole 1122 and then be screwed into the threaded hole 1121.

[0047] In this embodiment, the clamp 11 can be fitted onto the biopsy forceps inlet of the endoscope handle. By turning the adjusting bolt 12, the two upright plates 112 can be brought closer to each other, thereby reducing the inner diameter of the clamp 11 and tightening it at the biopsy forceps inlet of the endoscope handle.

[0048] In this embodiment of the biopsy forceps feed depth indicator device, the sleeve 11 is further provided with an anti-slip bushing inside; preferably, the inner sidewall of the anti-slip bushing is provided with anti-slip texture; preferably, the anti-slip bushing is made of rubber or silicone.

[0049] The biopsy forceps feed depth indication device in this embodiment, such as Figure 2 As shown, the elastic element 21 is a spring, which is compressed and installed between the other end of the top pressure element 22 and the bottom of the body.

[0050] In this embodiment of the biopsy forceps feed depth indication device, the other end of the pressing member 22 is provided with a positioning rod 223, which is inserted into the spring.

[0051] In this embodiment, the positioning rod 223 can ensure that the spring force on the pressing member 22 and the ejection direction of the pressing member 22 are basically consistent.

[0052] The biopsy forceps feed depth indication device in this embodiment, such as Figure 3 As shown, the main body includes a mounting sleeve 23 and a pressure regulating component 24; one end of the mounting sleeve 23 is connected to the outer wall of the guide sleeve 1, and the other end is provided with a mounting port 230; the pressure regulating component 24 is axially movable and mounted on the other end of the mounting sleeve 23 through a mounting structure, including a pressure regulating rod 241 and an adjusting knob 242 provided at one end of the pressure regulating rod 241, the adjusting knob 242 is located outside the mounting sleeve 23, and the other end of the pressure regulating rod 241 extends into the interior of the mounting sleeve 23 through the mounting port 230, and the end abuts against the end of the spring away from the top pressing component 22.

[0053] In this embodiment, by axially moving the pressure adjusting member 24, the axial position of the pressure adjusting rod 241 in the mounting sleeve 23 can be adjusted, thereby adjusting the pressure of the pressure adjusting rod 241 on the spring (the preload of the spring), and thus adjusting the magnitude of the axial movement resistance of the contact 221 to the annular rib 31.

[0054] In this embodiment of the biopsy forceps feed depth indicator device, the mounting structure includes an internal thread provided on the inner wall of the other end of the mounting sleeve 23 and an external thread provided on the pressure adjusting rod 241 that can be screwed into the internal thread.

[0055] In this embodiment, by turning the adjusting knob 242, the axial displacement of the pressure adjusting rod 241 inside the mounting sleeve 23 can be made more precise, and thus the axial movement resistance of the adjusting contact 221 to the annular rib 31 can also be made more precise.

[0056] The biopsy forceps feed depth indication device in this embodiment, such as Figure 3 As shown, it also includes a limiting structure, which includes a first limiting structure 231 disposed on the inner wall of one end of the mounting sleeve 23 and a second limiting structure 222 disposed on the outer wall of the top pressing member 22; the first limiting structure 231 and the second limiting structure 222 cooperate to axially limit the top pressing member 22.

[0057] In this embodiment, the first limiting structure 231 can be an annular flange provided on the inner wall of one end of the mounting sleeve, and the second limiting structure 222 can be a limiting protrusion provided on the outer wall of the pressing member 22. The limiting protrusion can abut against the end face of the annular flange away from the guide sleeve 1, thereby axially limiting the pressing member 22. Alternatively, the first limiting structure 231 can be a limiting protrusion provided on the inner wall of one end of the mounting sleeve 23, and the second limiting structure 222 can be an annular flange provided on the outer wall of the pressing member 22. The annular flange can abut against the end face of the limiting protrusion away from the guide sleeve 1, thereby axially limiting the pressing member 22. When the annular flange and the limiting protrusion abut against each other and limit each other, the contact 221 can normally contact the annular rib 31. The limiting structure can prevent the pressing member 22 from falling out of the mounting space 200 when the device is not in use.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A biopsy forceps feed depth indication device, characterized in that... ,include: The guide sleeve (1) is adapted to be fixedly installed at the biopsy forceps inlet of the endoscope handle by means of a connecting structure, and has a guide channel (100) communicating with the biopsy forceps inlet inside. The lateral clamping assembly (2) is disposed on the outer side wall of the guide sleeve (1), and includes a body having an internal mounting space (200) and a pressing member (22) that is telescopically mounted in the mounting space (200) by an elastic member (21); the mounting space (200) is connected to the guide channel (100), and one end of the pressing member (22) can extend into the guide channel (100) under the action of the elastic member (21), and always has a tendency to press against the center inside the guide channel (100); The damping sleeve (3) is suitable for being fitted onto the bar of the biopsy forceps and can move with the bar and enter the guide channel (100). When the damping sleeve (3) moves to contact one end of the pressure member (22), the frictional resistance between the pressure member (22) and the damping sleeve (3) increases significantly.

2. The biopsy forceps feed depth indication device according to claim 1, characterized in that: The top pressure member (22) is provided with a contact (221) at one end, and a plurality of annular ribs (31) are provided axially at intervals on the outer side wall of the damping sleeve (3); when the damping sleeve (3) moves to the point where the annular ribs (31) contact the contact (221), the contact (221) can generate significantly increased resistance to the further movement of the damping sleeve (3) through the annular ribs (31); Preferably, the contact (221) and / or the annular rib (31) are made of rubber or silicone.

3. The biopsy forceps feed depth indication device according to claim 2, characterized in that: The cross-sectional shape of the contact (221) is arc-shaped, triangular or trapezoidal, and the cross-sectional shape of the annular rib (31) is arc-shaped, triangular or trapezoidal.

4. The biopsy forceps feed depth indication device according to claim 1, characterized in that: The connection structure includes: A clamp (11) is provided at one end of the guide sleeve (1) and has a strip-shaped opening (111) opened along the axial direction. Two upright plates (112) are provided opposite to each other on the outer side wall of the clamp (11) on both sides of the strip-shaped opening (111). One of the upright plates (112) is provided with a threaded hole (1121) and the other upright plate (112) is provided with a smooth hole (1122) opposite to the threaded hole (1121). Adjusting bolt (12) is adapted to pass through the light hole (1122) and be screwed into the threaded hole (1121).

5. The biopsy forceps feed depth indication device according to claim 4, characterized in that: The hoop (11) is provided with an anti-slip bushing inside; Preferably, the inner wall of the anti-slip bushing is provided with anti-slip texture; Preferably, the anti-slip bushing is made of rubber or silicone.

6. The biopsy forceps feed depth indication device according to claim 1, characterized in that: The elastic element (21) is a spring, which is pressed and installed between the other end of the top pressure element (22) and the bottom of the body.

7. The biopsy forceps feed depth indication device according to claim 6, characterized in that: The other end of the top pressing member (22) is provided with a positioning rod (223), which is inserted into the spring.

8. The biopsy forceps feed depth indication device according to claim 6, characterized in that: The body includes: The mounting sleeve (23) is connected at one end to the outer wall of the guide sleeve (1) and has a mounting port (230) at the other end. The pressure regulating component (24) is axially movable and mounted on the other end of the mounting sleeve (23) via the mounting structure. It includes a pressure regulating rod (241) and an adjusting knob (242) located at one end of the pressure regulating rod (241). The adjusting knob (242) is located outside the mounting sleeve (23). The other end of the pressure regulating rod (241) extends into the interior of the mounting sleeve (23) through the mounting port (230), and its end abuts against the end of the spring away from the top pressure component (22).

9. The biopsy forceps feed depth indication device according to claim 8, characterized in that: The mounting structure includes an internal thread on the inner wall of the other end of the mounting sleeve (23) and an external thread on the pressure adjusting rod (241) that can be screwed into the internal thread.

10. The biopsy forceps feed depth indication device according to claim 8, characterized in that, It also includes a limiting structure, which includes a first limiting structure (231) disposed on the inner wall of one end of the mounting sleeve (23) and a second limiting structure (222) disposed on the outer wall of the top pressing member (22); the first limiting structure (231) and the second limiting structure (222) cooperate to axially limit the top pressing member (22).

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