Foreign matter grabber in human body cavity

Abstract

The invention relates to the technical field of medical equipment, in particular to a gripping device for foreign matters in a human body cavity, comprising: a tube body, the top of which is provided with an opening, the side wall of which is fixedly connected with a supporting plate, and the inner wall of which is provided with a limiting groove; the limiting column is arranged at the top of the pipe body, the top of the limiting column is fixedly connected with a handle, the bottom of the limiting column extends into the pipe body, and the side wall of the limiting column is slidably connected with the limiting groove through a limiting block; the grabbing assembly is arranged at the bottom of the limiting column; the multiple grabbing arms and the connecting net are matched with the spherical grabbing block to improve the operation flexibility so as to adapt to different forms of foreign matters, the limiting structure and the spring are used for buffering to enhance the grabbing stability and safety so as to avoid damage, and the adjustable supporting plate and the limiting structure are used for improving the adaptability and practicability so as to adapt to different crowds and scenes; the defects of a traditional tool can be effectively overcome, and the cavity foreign matter taking-out efficiency and safety are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a foreign body grasper for human cavities. Background Technology

[0002] Foreign body retention in human cavities (such as the digestive and respiratory tracts) is a common clinical emergency. If not removed promptly, the foreign body can easily cause mucosal damage, secondary infection, and luminal obstruction; in severe cases, it can even lead to perforation, directly threatening the patient's life. Furthermore, procedures such as appendectomy for fecalith removal, bile duct stone removal, and tissue retrieval after endoscopic submucosal dissection (ESD) also place a strong demand on efficient and safe foreign body / tissue retrieval tools. Therefore, highly efficient and safe retrieval tools are critical clinical equipment. Currently used traditional tools such as biopsy forceps and snares have significant limitations: poor operational flexibility; the rigid structure and fixed opening angle of biopsy forceps make them difficult to adapt to different shapes of foreign bodies and prone to slippage; snares have poor containment of irregular foreign bodies and are prone to accidental mucosal contact in narrow cavities. They also lack sufficient retrieval stability and safety, lack limiting and buffering structures, making it difficult to control the force, easily causing foreign body displacement or mucosal damage, and the retrieval components lack auxiliary design, making it difficult to separate foreign bodies adhering to the cavity wall. Limited adaptability and practicality, the rod body and gripping components are integrated, making it impossible to flexibly adjust the extension length. There are blind spots when operating in deep cavities, and there is no dedicated positioning structure. Manually maintaining the posture is easy to cause fatigue and increases the risk. Summary of the Invention

[0003] In view of this, the present invention addresses the shortcomings of the prior art by proposing a foreign body grasper for human cavities, aiming to solve at least one of the problems mentioned in the background art.

[0004] The present invention provides a foreign object grasper for human body cavities, comprising: a tube body with an opening at the top, a support plate fixedly connected to the side wall of the tube body, and a limit groove provided on the inner wall of the tube body; A limiting post is provided at the top of the tube body. A handle is fixedly connected to the top of the limiting post, and the bottom of the limiting post extends into the interior of the tube body. The side wall of the limiting post is slidably connected to the limiting groove through a limiting block. The gripping component is located at the bottom of the limiting post.

[0005] In some embodiments, the axial cross-section of the tube is rectangular.

[0006] In some embodiments, the outer diameter of the limiting post matches the inner diameter of the opening at the top of the tube, and the outer diameter of the limiting post is smaller than the inner diameter of the tube.

[0007] In some embodiments, the limiting groove is vertically disposed inside the tube body, one end of the limiting block is fixedly connected to the side wall of the limiting post, the other end of the limiting block extends into the interior of the limiting groove, and the other end of the limiting block is slidably connected to the limiting groove.

[0008] In some embodiments, the sidewall of the tube is symmetrically provided with a plurality of vertically spaced threaded holes, and the end of the support plate near the tube is provided with an external thread that matches the threaded holes, and the support plate is threadedly fixedly connected to the threaded holes.

[0009] In some embodiments, the crawling component includes: A connecting rod, the top of which is fixedly connected to the bottom of the limiting post; Multiple gripping arms are provided, and the top of each gripping arm is fixedly connected to the bottom of the connecting rod. A connecting net is fixedly connected between each gripping arm.

[0010] In some embodiments, a gripping block is fixedly connected to the bottom of the gripping arm, and the gripping block has a spherical structure.

[0011] In some embodiments, a fixing block is fixedly connected to the bottom of the limiting post, and the bottom of the fixing block is fixedly connected to the top of the connecting rod.

[0012] In some embodiments, the crawling component further includes: A support plate is disposed inside the tube body and is located at the bottom of the fixing block. The side wall of the support plate is fixedly connected to the inner wall of the tube body. A sliding hole is provided on the support plate, and the connecting rod passes through the sliding hole. The side wall of the connecting rod is slidably connected to the sliding hole. A spring is disposed between the support plate and the limiting post, with the top of the spring fixedly connected to the bottom of the limiting post and the bottom of the spring fixedly connected to the top of the support plate.

[0013] In some embodiments, a sleeve is provided at the bottom of the tube body, the top of the sleeve is fixedly connected to the bottom of the tube body, and the sleeve is fitted over the outside of the connecting rod.

[0014] Compared with existing technologies, the advantages of this invention are as follows: In terms of operational flexibility, its grasping component includes multiple grasping arms and a connecting net, which, together with a spherical grasping block, can adapt to foreign objects of different shapes, avoiding the slippage of traditional biopsy forceps and the poor wrapping effect of snares. Adjustment within narrow cavities is more convenient, reducing the risk of accidental mucosal contact. Regarding grasping stability and safety, the limiting post slides along the limiting groove via the limiting block, combined with a spring buffer structure, enabling precise control of the grasping force and preventing excessive force that could cause foreign object displacement or mucosal damage. The support plate and sleeve provide stable support for the connecting rod, aiding in the separation of foreign objects adhering to the cavity wall and reducing the risk of secondary injury. In terms of adaptability and practicality, the tray can be adjusted and fixed in position via threaded holes, facilitating positioning according to the cavity conditions. The limiting structure allows for flexible adjustment of the grasping component's extension length, solving the problem of blind spots in deep cavity operations, eliminating the need to manually maintain the tool's posture, reducing operator fatigue, and lowering surgical risks. Simultaneously, the overall design is adaptable to special populations such as children and the elderly, meeting the needs of different clinical scenarios and improving the efficiency and safety of foreign body removal from cavities.

[0015] The above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0016] Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front structural cross-sectional view of the foreign body grasper for human body cavities provided in an embodiment of the present invention; Figure 2 This is a side view of a foreign object grasper for human cavities provided in an embodiment of the present invention; Figure 3 This is a front view of the tray of the foreign object grabber for human cavities provided in an embodiment of the present invention.

[0019] The components are: 1. Pipe body; 2. Support plate; 3. Limiting groove; 4. Limiting post; 5. Handle; 6. Limiting block; 7. Threaded hole; 8. Connecting rod; 9. Gripping arm; 10. Connecting net; 11. Gripping block; 12. Fixing block; 13. Support plate; 14. Sliding hole; 15. Spring; 16. Sleeve. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] See Figure 1-3 As shown, a foreign body grasper for human cavities according to an embodiment of this application includes: The tube body 1 has an opening at its top, a support plate 2 is fixedly connected to the side wall of the tube body 1, and a limit groove 3 is provided on the inner wall of the tube body 1. A limiting post 4 is disposed at the top of the tube body 1. A handle 5 is fixedly connected to the top of the limiting post 4. The bottom of the limiting post 4 extends into the interior of the tube body 1. The side wall of the limiting post 4 is slidably connected to the limiting groove 3 through a limiting block 6. The gripping component is located at the bottom of the limiting post 4.

[0025] In some specific embodiments, the axial cross-section of the tube 1 is a rectangular structure.

[0026] In some specific embodiments, the outer diameter of the limiting post 4 matches the inner diameter of the top opening of the tube body 1, and the outer diameter of the limiting post 4 is smaller than the inner diameter of the tube body 1.

[0027] In some specific embodiments, the limiting groove 3 is vertically disposed inside the tube body 1, one end of the limiting block 6 is fixedly connected to the side wall of the limiting post 4, the other end of the limiting block 6 extends into the interior of the limiting groove 3, and the other end of the limiting block 6 is slidably connected to the limiting groove 3.

[0028] In some specific embodiments, the sidewall of the tube body 1 is symmetrically provided with a plurality of vertically spaced threaded holes 7, and the end of the support plate 2 near the tube body 1 is provided with an external thread that matches the threaded holes 7, and the support plate 2 is threadedly fixedly connected to the threaded holes 7.

[0029] It should be understood that this design enables precise and stable adjustment of the height of the tray 2, providing reliable support for operation. The multiple vertically spaced threaded holes 7 on the tube 1 essentially provide multiple "fixed positions" for the tray 2. Medical personnel can select the appropriate height of the threaded hole 7 to connect with the tray 2 based on the actual operating scenario (such as the depth of the cavity in different patients, hand posture during operation, and the length of the instrument inserted into the cavity). For example, when operating in shallower cavities, the tray 2 can be fixed in the upper part of the tube 1, allowing the hand to more easily support the tray 2 to control the instrument; when operating in deeper cavities, the tray 2 can be lowered to the lower part of the tube 1 to prevent the tray 2 from being too high and affecting the insertion of the instrument. Meanwhile, the threaded connection itself is self-locking. When the external thread of the tray 2 is tightened with the threaded hole 7, the two can mesh tightly, preventing the tray 2 from loosening or shifting due to pressing or lifting actions during operation. This ensures that the tray 2 can continuously provide stable support for the tube 1, preventing the tube 1 from shaking randomly within the cavity—which is crucial for cavity operations with limited visibility, reducing the risk of scratching the cavity wall due to instrument shaking or the grasping component deviating from the foreign object target. It greatly improves the flexibility of the instrument's adaptability to different scenarios, and can cope with different operational needs and individual differences. On the one hand, different patients have different cavity structures (such as the nasal cavity, ear canal, a segment of the digestive tract, etc.) in terms of depth and diameter. The same instrument needs to be adapted to different operating spaces: for example, for cavity operations in pediatric patients, the instrument insertion depth is shorter, and the tray 2 needs to be fixed in a higher position to shorten the distance from the "hand support point" to the "grasping component" for convenient precise control; for operations in deeper cavities in adults, the tray 2 needs to be lowered to adapt to a longer insertion depth. On the other hand, different medical staff have different operating habits (such as whether they prefer to operate with one hand or both hands, or their preferred grip position due to different hand sizes). The adjustable tray 2 allows each operator to find the most comfortable support position—for example, operators with larger hands can adjust the tray 2 to a slightly lower position so that their palms can fit more snugly against it; operators with smaller hands can adjust the tray 2 upwards to avoid difficulty in applying force to their fingers due to the tray 2 being too low. This flexibility allows the same instrument to be adapted to various patient groups and operating scenarios without modification, reducing the instrument adaptation cost in clinical use.

[0030] The threaded connection also offers ease of installation, disassembly, and maintenance. During device assembly, medical staff simply align the tray 2 with the target threaded hole 7 and rotate it clockwise to secure it, requiring no additional tools – a simple and efficient operation. When it's necessary to replace the tray 2 (if it's worn or deformed) or clean the tube 1, simply rotating the tray 2 counter-clockwise allows for quick disassembly, facilitating thorough cleaning and disinfection of the threaded hole 7 on the side wall of the tube 1 and the surface of the tray 2 – this is especially important for medical devices requiring strict aseptic operation, reducing cleaning dead zones and lowering the risk of cross-infection. Simultaneously, the threaded structure is highly durable; repeated disassembly and installation are unlikely to damage the connection, extending the service life of the tray 2 and the tube 1, further enhancing the device's practical value.

[0031] In some specific embodiments, the crawling component includes: The top of the connecting rod 8 is fixedly connected to the bottom of the limiting post 4; Multiple gripping arms 9 are provided, and the top of each gripping arm 9 is fixedly connected to the bottom of the connecting rod 8. A connecting net 10 is fixedly connected between each gripping arm 9.

[0032] In some specific embodiments, a gripping block 11 is fixedly connected to the bottom of the gripping arm 9, and the gripping block 11 has a spherical structure.

[0033] In some specific embodiments, a fixing block 12 is fixedly connected to the bottom of the limiting post 4, and the bottom of the fixing block 12 is fixedly connected to the top of the connecting rod 8.

[0034] In some specific embodiments, the crawling component further includes: A support plate 13 is disposed inside the tube body 1 and is located at the bottom of the fixing block 12. The side wall of the support plate 13 is fixedly connected to the inner wall of the tube body 1. A sliding hole 14 is provided on the support plate 13. The connecting rod 8 passes through the sliding hole 14 and the side wall of the connecting rod 8 is slidably connected to the sliding hole 14. A spring 15 is disposed between the support plate 13 and the limiting post 4. The top of the spring 15 is fixedly connected to the bottom of the limiting post 4, and the bottom of the spring 15 is fixedly connected to the top of the support plate 13.

[0035] In some specific embodiments, a sleeve 16 is provided at the bottom of the tube body 1, the top of the sleeve 16 is fixedly connected to the bottom of the tube body 1, and the sleeve 16 is sleeved on the outside of the connecting rod 8.

[0036] It should be understood that, firstly, the threaded holes 7 symmetrically arranged on the side wall of the tube body 1 engage with the external threads of the support plate 2 to fix the support plate 2 at a suitable height in the tube body 1. This design allows the position of the support plate 2 to be adjusted according to the operating scenario. During subsequent operations, the support plate 2 can provide stable support for the entire instrument, preventing the tube body 1 from shaking freely within the cavity. At the same time, the limiting post 4 is slidably connected to the vertical limiting groove 3 on the inner wall of the tube body 1 through the limiting block 6 on the side wall. The outer diameter of the limiting post 4 matches the inner diameter of the top opening of the tube body 1 and is smaller than the inner diameter of the tube body 1. This ensures that the limiting post 4 can slide stably along the axial direction of the tube body 1 while preventing deviation during the sliding process. The sleeve 16 at the bottom of the tube body 1 is fitted onto the outside of the connecting rod 8, further limiting the movement direction of the connecting rod 8 and laying the foundation for the accuracy of subsequent grasping actions.

[0037] When entering the cavity, the spring 15 is initially in a naturally extended state (both ends of the spring 15 are fixed to the bottom of the limiting post 4 and the top of the support plate 13 inside the tube 1, respectively). At this time, the connecting rod 8, which is connected to the bottom of the limiting post 4 through the fixing block 12, will drive the multiple gripping arms 9 at the bottom to be in a "closed" state. After the gripping arms 9 are closed, their overall volume is smaller, allowing them to pass smoothly through the sleeve 16 into the human cavity and avoid scratching damage to the inner wall of the cavity. During operation, medical staff hold the handle 5 at the top of the limiting post 4 and slowly send the tube 1 and the closed gripping components into the cavity until the gripping arms 9 reach the location of the foreign object. During this process, the sliding hole 14 on the support plate 13 slides and engages with the connecting rod 8, always restricting the connecting rod 8 to move only along the axial direction, ensuring that the gripping components do not deviate from the target direction.

[0038] The foreign object retrieval stage is the core step. After the grasping arm 9 is aligned with the foreign object, the medical staff presses down on the handle 5, causing the limiting post 4 to slide downward along the axis of the tube body 1 (the limiting block 6 moves downward synchronously along the limiting groove 3, continuously ensuring the stability of the limiting post 4). When the limiting post 4 moves downward, it compresses the spring 15 (the spring 15 is squeezed and deformed between the support plate 13 and the limiting post 4), and at the same time, it pushes the connecting rod 8 downward along the sliding hole 14 of the sleeve 16 and the support plate 13 through the fixing block 12. As the connecting rod 8 moves downward, the multiple grasping arms 9 fixed at its bottom gradually break free from the constraint of the sleeve 16 and open outward under the action of its own structural elasticity and the contact force of the foreign object until the multiple grasping arms 9 wrap around the foreign object. At this time, the spherical gripping block 11 at the bottom of the gripping arm 9 can increase the contact area and friction with the foreign object, preventing the foreign object from slipping; while the connecting net 10 fixed between the gripping arms 9 can catch small or easily broken foreign objects, preventing the foreign object from scattering during the gripping process, and further improving the gripping reliability.

[0039] During the foreign body removal and instrument repositioning phase, once it is confirmed that the grasping arm 9 stably encloses the foreign body, the medical staff slowly pulls the handle 5 upwards, causing the limiting post 4 to slide upwards along the limiting groove 3. As the limiting post 4 moves upwards, the spring 15 gradually returns to its natural extended state. Simultaneously, the connecting rod 8 retracts upwards with the limiting post 4, and the multiple grasping arms 9 retract again under the constraint of the sleeve 16, further clamping the foreign body and ensuring it will not fall out during removal. Subsequently, the medical staff, holding the handle 5, slowly moves the entire instrument along with the grasped foreign body out of the body cavity, completing the foreign body removal operation. Throughout the entire process, the axial rectangular cross-section design of the tube 1 enhances the structural strength of the tube itself, preventing deformation during pressing and pulling operations. The sliding and limiting coordination of each component ensures the stability and accuracy of the operation, ultimately achieving safe and efficient retrieval of foreign bodies within the body cavity.

[0040] From an operational safety perspective, this gripper minimizes the risk of damage to human body cavities through a multi-dimensional structural design. During the entry of the device into the cavity, the spring is initially in a naturally extended state, causing multiple gripping arms connected to the connecting rod to "close" in a "retracted" state. Furthermore, the sleeve at the bottom of the tube, fitted over the connecting rod, further restricts the extension space of the gripping arms, significantly reducing the overall size of the gripping assembly. This allows for a more compact entry into the cavity, effectively preventing scratching of the cavity wall when the gripping arms open. Simultaneously, the spherical gripping block at the bottom of the gripping arm eliminates sharp edges, ensuring effective contact with foreign objects while preventing puncture damage to cavity tissues during operation. In addition, the limiting post and tube body, through the sliding engagement of the limiting block and limiting groove, as well as the multiple limiting mechanisms of the connecting rod, support plate sliding holes, and sleeve, ensure that the gripping assembly always moves only along the tube's axial direction. This prevents the device from shifting or wobbling within the cavity, thus avoiding collisions with the cavity wall and further ensuring operational safety through its movement trajectory.

[0041] In terms of operational stability and convenience, the gripper's structural design fully considers the actual operational needs of medical personnel, providing strong support for precise operation. Multiple vertically spaced threaded holes are symmetrically arranged on the side wall of the tube. The support plate is detachably fixed through the engagement of external threads and threaded holes. Medical personnel can flexibly adjust the height of the support plate on the tube according to the actual scenario, such as cavity depth and operating posture. During subsequent operations, the support plate can be placed in a suitable position, providing stable support for the entire device and preventing the tube from swaying during pressing and pulling, significantly reducing the difficulty of operation. Simultaneously, the handle fixedly connected to the top of the limiting post provides a comfortable and stable gripping point for medical personnel. Pressing and pulling actions are directly transmitted to the limiting post through the handle. Combined with the guiding effect of the limiting block and limiting groove, the sliding process of the limiting post along the tube axis is smooth and controllable, eliminating the need for additional adjustment of the device angle. This effectively improves the accuracy and convenience of operation, making it particularly suitable for delicate operations in environments with limited visibility.

[0042] From a reliability perspective, this gripper significantly improves the gripping effect on different types of foreign objects through the coordinated action of multiple components, effectively solving the problems of slippage and scattering that are common with traditional grippers. During the gripping phase, as the connecting rod extends downwards, the gripping arms open outwards after being released from the sleeve, wrapping around the foreign object from multiple angles to accommodate objects of different shapes and sizes. The spherical gripping block increases the contact area and friction with the foreign object, firmly holding it in place even on smooth surfaces to prevent slippage. The fixed connecting mesh between the gripping arms provides a safety net for small, granular, or easily breakable foreign objects, preventing them from scattering from the gaps between the gripping arms during gripping and ensuring complete removal. During the removal phase, pulling the handle upwards causes the gripping arms to retract under the sleeve's constraint, further clamping the foreign object, forming a closed loop of "grip-clamp-remove," ensuring the object remains in a stable gripping state throughout the entire removal process and significantly improving the success rate. Furthermore, the structural design of this gripper also takes into account the durability and adaptability of the instrument. The tube body adopts a rectangular cross-section structure in the axial direction, which can more effectively enhance the structural strength of the tube body itself compared with a circular cross-section, avoiding deformation during force operations such as pressing and lifting, and extending the service life of the instrument. The components are connected by a combination of fixed connection and sliding fit. For example, the limiting post and the connecting rod are fixed by a fixing block, and the gripping arm and the connecting rod are fixedly connected, which ensures the stability of the component connection and reduces the risk of loosening of parts during use. At the same time, the overall structure of the instrument is compact, and the functions of each component are clearly defined. It is not only suitable for the operating space requirements of different cavities in the human body, but also facilitates subsequent cleaning, disinfection and maintenance, providing convenience for long-term clinical use.

[0043] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A foreign body grasper for human body cavities, characterized in that, include: The tube has an opening at the top, a support plate is fixedly connected to the side wall of the tube, and a limit groove is provided on the inner wall of the tube. A limiting post is provided at the top of the tube body. A handle is fixedly connected to the top of the limiting post, and the bottom of the limiting post extends into the interior of the tube body. The side wall of the limiting post is slidably connected to the limiting groove through a limiting block. The gripping component is located at the bottom of the limiting post.

2. The foreign body grasper for human body cavities according to claim 1, characterized in that, The axial cross-section of the tube is rectangular.

3. The foreign body grasper for human body cavities according to claim 2, characterized in that, The outer diameter of the limiting post matches the inner diameter of the opening at the top of the tube, and the outer diameter of the limiting post is smaller than the inner diameter of the tube.

4. A foreign body grasper for human body cavities according to claim 3, characterized in that, The limiting groove is vertically disposed inside the tube body. One end of the limiting block is fixedly connected to the side wall of the limiting post, and the other end of the limiting block extends into the interior of the limiting groove. The other end of the limiting block is slidably connected to the limiting groove.

5. A foreign body grasper for human body cavities according to claim 4, characterized in that, The sidewall of the tube is symmetrically provided with a plurality of vertically spaced threaded holes, and the end of the support plate near the tube is provided with an external thread that matches the threaded holes. The support plate is threadedly fixedly connected to the threaded holes.

6. A foreign body grasper for human body cavities according to claim 5, characterized in that, The crawling component includes: A connecting rod, the top of which is fixedly connected to the bottom of the limiting post; Multiple gripping arms are provided, and the top of each gripping arm is fixedly connected to the bottom of the connecting rod. A connecting net is fixedly connected between each gripping arm.

7. A foreign body grasper for human body cavities according to claim 6, characterized in that, A gripping block, which is spherical in shape, is fixedly connected to the bottom of the gripping arm.

8. A foreign body grasper for human body cavities according to claim 7, characterized in that, A fixing block is fixedly connected to the bottom of the limiting post, and the bottom of the fixing block is fixedly connected to the top of the connecting rod.

9. A foreign body grasper for human body cavities according to claim 8, characterized in that, The crawling component also includes: A support plate is disposed inside the tube body and is located at the bottom of the fixing block. The side wall of the support plate is fixedly connected to the inner wall of the tube body. A sliding hole is provided on the support plate, and the connecting rod passes through the sliding hole. The side wall of the connecting rod is slidably connected to the sliding hole. A spring is disposed between the support plate and the limiting post, with the top of the spring fixedly connected to the bottom of the limiting post and the bottom of the spring fixedly connected to the top of the support plate.

10. A foreign body grasper for human body cavities according to claim 9, characterized in that, A sleeve is provided at the bottom of the tube body, and the top of the sleeve is fixedly connected to the bottom of the tube body. The sleeve is fitted over the outside of the connecting rod.

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