Digestive endoscopy specimen resection and recovery device
By designing a digestive endoscopy specimen resection and retrieval device, rapid specimen cutting and retrieval without repeated insertion for sampling is achieved, solving the problem of cumbersome operation of traditional endoscopic biopsy forceps, and improving diagnostic efficiency and patient comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-04
- Publication Date
- 2026-04-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional endoscopic biopsy forceps sampling process is cumbersome, which increases patient discomfort and prolongs the operation time, and also increases friction and irritation to the mucous membranes of the throat and digestive tract.
A digestive endoscope specimen resection and retrieval device was designed, which uses a rotating ring, a mounting plate and multiple cutting and storage components, and is equipped with a micro motor-driven switching component. This allows the cutting and storage components to be rotated and switched without completely withdrawing the endoscope channel, so as to simultaneously cut and retrieve the specimen, and each specimen can be stored independently.
It greatly shortens the operation time, reduces patient suffering, improves the success rate of specimen acquisition, prevents specimen loss and cross-contamination, simplifies mechanical design, and improves the sealing and durability of the device.
Smart Images
Figure CN121845646A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically to a digestive endoscopy specimen resection and recovery device. Background Technology
[0002] Digestive endoscopy is an indispensable tool in modern medicine for the diagnosis and treatment of gastrointestinal diseases. During endoscopic examinations, it is often necessary to perform biopsies on suspicious lesions, that is, to remove small tissue samples for pathological analysis, which is the gold standard for diagnosing diseases.
[0003] Currently, the most commonly used instrument for endoscopic sampling in clinical practice is the traditional endoscopic biopsy forceps. Traditional biopsy forceps are typically designed for single-sampling. In clinical practice, to ensure diagnostic accuracy, it is often necessary to obtain multiple tissue specimens from the same lesion area or different areas. When using traditional biopsy forceps, after each specimen is obtained, the operator must completely remove the forceps from the endoscope's working channel, retrieve the specimen externally, and then reinsert it into the endoscope channel to navigate to the next sampling point. This "insertion-sampling-withdrawal-reinsertion" process is extremely cumbersome and time-consuming, significantly prolonging the entire endoscopic examination and treatment time. The repeated insertion and removal of the instrument within the endoscope channel inevitably increases friction and irritation to the patient's throat and digestive tract mucosa, exacerbating discomfort and pain. Simultaneously, the excessively long procedure time also correspondingly increases anesthesia and surgery-related risks. Therefore, a digestive endoscopy specimen resection and retrieval device has been proposed. Summary of the Invention
[0004] In view of the shortcomings of the prior art, the present invention provides a digestive endoscopy specimen resection and retrieval device, which solves the problem that repeated insertion and removal of instruments in the endoscope channel will inevitably increase friction and irritation to the patient's throat and digestive tract mucosa, exacerbating the patient's discomfort and pain.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a digestive endoscopy specimen resection and retrieval device, comprising a housing, a first pull rod slidably connected inside the housing, a limiting plate fixedly connected to the outer wall of the first pull rod, a connecting shaft fixedly connected to the side of the limiting plate away from the first pull rod, a sleeve fixedly connected to the side of the connecting shaft away from the limiting plate, a locking assembly provided inside the housing, a rotating ring rotatably connected inside the sleeve, a mounting plate fixedly connected to the inner wall of the rotating ring, multiple cutting and storage assemblies fixedly connected to the outer wall of the mounting plate, a switching assembly provided inside the sleeve, and a control assembly provided on the outer wall of the housing; The locking assembly includes multiple inclined plates, a rotating shaft, and a baffle. The inclined plates are fixedly connected to the outer wall of the first pull rod, the rotating shaft is rotatably connected to the inside of the housing, an inclined block is fixedly connected to the outer wall of the rotating shaft, a torsion spring is sleeved on the outer wall of the rotating shaft, and the baffle is fixedly connected to the inner wall of the housing.
[0006] Preferably, the cutting and storage assembly includes at least two storage cylinders, each storage cylinder is fixedly connected to the outer wall of the mounting plate, and two sliding rods are fixedly connected to the inner wall of each storage cylinder. A slider is slidably connected to the outer wall of each sliding rod, and a first connecting rod is rotatably connected to the top of each slider. A second connecting rod is rotatably connected to the ends of the two first connecting rods away from the sliders, and the ends of the two second connecting rods close to each other are rotatably connected via bearings. A cutting blade is fixedly connected to the outer wall of each second connecting rod, and a storage net is fixedly connected to the bottom of each second connecting rod. A third connecting rod is rotatably connected to the outer wall of each of the two first connecting rods, and a second pull rod is rotatably connected to the ends of the two third connecting rods away from the first connecting rods. A first magnetic block is fixedly connected to the side of the second pull rod away from the third connecting rod through the storage cylinder. A first spring is sleeved on the outer wall of each sliding rod, and a fixing assembly is installed inside the storage cylinder.
[0007] Preferably, the fixing component includes a fixing cylinder, which is fixedly connected to the inner wall of the storage cylinder. A limiting block is slidably connected inside the fixing cylinder. A second spring is fixedly connected to one side of the limiting block, and a pin is fixedly connected to the other side of the limiting block.
[0008] Preferably, the switching component includes a micro motor and an internal gear ring. The micro motor is fixedly connected to the inner wall of the sleeve, and a gear is fixedly connected to the output end of the micro motor. The internal gear ring is fixedly connected to the inner wall of the mounting plate, and the gear and the internal gear ring mesh with each other.
[0009] Preferably, the control component includes a housing, the housing being fixedly connected to the outer wall of the housing, a sliding plate being slidably connected inside the housing, a third pull rod being fixedly connected to the middle of the sliding plate, and a second magnetic block being fixedly connected to the outer wall of the third pull rod.
[0010] Preferably, the inclined plate and the inclined block abut against each other, the baffle and the inclined block abut against each other, one end of the torsion spring is fixedly connected to the outer wall of the inclined block, and the other end of the torsion spring is fixedly connected to the inner wall of the housing.
[0011] Preferably, the outer wall of the second pull rod has a fixing hole, and the pin passes through the fixing cylinder and engages with the fixing hole.
[0012] Preferably, the ends of the two second connecting rods away from the first connecting rod abut against the inner wall of the sleeve, and the second magnetic block and the first magnetic block attract each other.
[0013] Preferably, one end of the first spring is fixedly connected to the outer wall of the slider, and the other end of the first spring is fixedly connected to the inner wall of the storage cylinder.
[0014] Preferably, a circular hole is provided on the side of the sleeve away from the connecting shaft, and the diameter of the circular hole is larger than the width of the storage net.
[0015] This invention provides a device for resecting and recovering endoscopic specimens. It has the following beneficial effects: 1. This invention incorporates a rotating ring, a mounting plate, and multiple cutting and storage components, along with a switching assembly driven by a micro-motor. After completing one specimen cutting and retrieval operation, the operator does not need to remove the entire instrument from the endoscope channel. Simply activating the switching assembly rotates the mounting plate, aligning a brand-new, unused cutting and storage assembly with the work exit for immediate sampling. This completely transforms the inefficient traditional biopsy forceps insertion and sampling process, significantly shortening surgical time, reducing patient discomfort from repeated instrument insertion and removal, and lessening the workload for medical staff.
[0016] 2. In the cutting and storage assembly of this invention, the cutting blade and the storage net are cleverly connected to a second connecting rod. When the cutting action is performed, the storage net simultaneously scoops up the specimen the instant the cutting blade closes. This synchronous cutting and storage design ensures that the specimen is captured at the same moment it is cut, fundamentally avoiding the problem of specimen drifting or loss after cutting and before retrieval, and significantly improving the success rate of specimen retrieval.
[0017] 3. Each cutting and storage component of this invention includes an independent storage tube. After the specimen is collected into the storage net and retracted into the storage tube, the fixing component immediately and automatically locks the second pull rod (24). This ensures that each specimen is safely sealed in its own storage tube. This independent, sealed, and locked storage method not only prevents the obtained specimens from accidentally falling out during subsequent operations, but more importantly, it eliminates cross-contamination between different specimens, ensuring the accuracy of subsequent pathological analysis.
[0018] 3. This invention employs a magnetic non-contact transmission between the control component and the cutting and storage component. There is no rigid mechanical connection between the external control rod and the internal rotatable cutting mechanism. This allows the switching component to freely rotate its mounting plate without disturbing the control component. This structure simplifies mechanical design, improves the device's sealing and durability, and reduces the failure rate. Attached Figure Description
[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the housing of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the sleeve of the present invention; Figure 5for Figure 4 Enlarged view at point B in the middle; Figure 6 This is a cross-sectional view of the storage tube of the present invention; Figure 7 This is a cross-sectional view of the fixed cylinder of the present invention; Figure 8 This is a cross-sectional view of the outer casing of the present invention.
[0020] The components are as follows: 1. Shell; 2. First pull rod; 3. Limiting plate; 4. Connecting shaft; 5. Sleeve; 6. Inclined plate; 7. Rotating shaft; 8. Inclined block; 9. Torsion spring; 10. Baffle; 11. Micro motor; 12. Gear; 13. Rotating ring; 14. Mounting plate; 15. Internal gear ring; 16. Storage tube; 17. Slide rod; 18. Slider; 19. First connecting rod; 20. Second connecting rod; 21. Cutting blade; 22. Storage net; 23. Third connecting rod; 24. Second pull rod; 25. First magnetic block; 26. First spring; 27. Fixing hole; 28. Fixing tube; 29. Limiting block; 30. Second spring; 31. Pin; 32. Shell; 33. Slide plate; 34. Third pull rod; 35. Second magnetic block. Detailed Implementation
[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example
[0022] Please see the appendix Figure 1 - Appendix Figure 8This invention provides a digestive endoscopy specimen resection and retrieval device, including a housing 1. The housing 1 houses and protects the internal components of the device and provides an external operating interface. A first pull rod 2 is slidably connected inside the housing 1, and the first pull rod 2 can reciprocate axially inside the housing 1. The operator pushes or pulls the first pull rod 2 to extend or retract the main mechanical components of the device. The length of the first pull rod 2 is the effective working length. To accommodate different types of endoscopes (such as gastroscopes and colonoscopes), this device is available in various specifications. For example, the model that adapts to a standard colonoscope typically has an effective working length of 2300 mm; the model that adapts to a standard gastroscope has an effective working length of 1800 mm. A limiting plate 3 is fixedly connected to the outer wall of the first pull rod 2. The limiting plate 3 is used to limit the sliding stroke of the first pull rod 2 and acts as a force or motion transmission component, interacting with the locking assembly. A connecting shaft 4 is fixedly connected to the side of the limiting plate 3 away from the first pull rod 2. The connecting shaft 4 acts as a rigid connector, stably transmitting the linear motion of the first pull rod 2 and the limiting plate 3 to the subsequent sleeve 5. The sleeve 5 is fixedly connected to the side of the connecting shaft 4 away from the limiting plate 3, and the sleeve 5 moves linearly together with the connecting shaft 4. It acts as a mobile platform or outer casing to house and move the internal mechanism forward or backward. Its maximum outer diameter is strictly designed to be ≤2.7mm, ensuring the device can smoothly pass through the 2.8mm diameter endoscopic biopsy channel, and providing necessary clearance for pushing, rotating, and suction operations. A locking assembly is installed inside the housing 1. The core function of this assembly is to control the axial position of the first pull rod 2, allowing it to be locked or released at specific positions to prevent accidental slippage. A rotating ring 13 is rotatably connected inside the sleeve 5. The rotating ring 13 is installed inside the sleeve 5 and cannot move axially with the sleeve 5, but it can rotate relative to the sleeve 5. This design allows the device to switch between different functional heads without changing its axial position. A mounting plate 14 is fixedly connected to the inner wall of the rotating ring 13, serving as an extension of the rotating ring 13 and rotating with it. It serves as a base for mounting multiple cutting and storage components. Multiple cutting and storage components are fixedly connected to the outer wall of the mounting plate 14. By rotating the mounting plate 14, one of the cutting and storage components can be aligned with the working outlet of the device, putting it in a standby state. A switching component is provided inside the sleeve 5. The function of the switching component is to provide power to drive the rotating ring 13 and the mounting plate 14 to rotate, thereby realizing the switching selection between different cutting and storage components. A control component is provided on the outer wall of the housing 1. The control component is used to control the internal mechanism of the cutting and storage component to perform fine actions such as opening, closing, cutting, and recycling. The locking assembly includes multiple ramps 6, a pivot 7, and a baffle 10. The ramps 6 are fixedly connected to the outer wall of the first pull rod 2. The pivot 7 is rotatably connected inside the housing 1. The pivot 7 is a pivot in the locking assembly and can rotate within the housing 1 to perform locking or unlocking actions. A ramp 8 is fixedly connected to the outer wall of the pivot 7 and rotates with the pivot 7. It has a surface that mates with the ramps 6 to receive the thrust from the ramps 6; it also has a surface that mates with the baffle 10 to achieve mechanical limiting or locking. A torsion spring 9 is sleeved on the outer wall of the pivot 7, providing a preset torsional torque for the pivot 7. The baffle 10 is fixedly connected to the inner wall of the housing 1 and is a stationary component that provides a final stop position or locking position for the rotation of the ramp 8.
[0023] The cutting and storage assembly includes at least two storage cylinders 16, which are fixedly connected to the outer wall of the mounting plate 14. Each storage cylinder 16 is an independent cavity for a single cutting and recycling tool, providing space and guidance for the internal precision linkage, blades, and storage net. Two slide rods 17 are fixedly connected to the inner wall of the storage cylinder 16. The slide rods 17 provide two parallel, fixed guide rails inside the storage cylinder 16 to guide the slider 18 to perform precise linear motion. The slider 18 is slidably connected to the outer wall of the slide rods 17 and is the drive source of the linkage mechanism. It slides back and forth along the guide of the slide rods 17, and its linear motion is converted into the opening and closing motion of the cutting blade 21 through the subsequent linkage. A first linkage 19 is rotatably connected to the top of the slider 18, and one end of the first linkage 19 is hinged to the slider 18. When the slider 18 moves, it pushes or pulls the first link 19, activating the entire shearing mechanism. The ends of the two first links 19 furthest from the slider 18 are rotatably connected to the second links 20. The ends of the two second links 20 closest to each other are rotatably connected via bearings. This connection method constitutes a multi-link mechanism. The movement of the first link 19 is transmitted to the second links 20. A cutting blade 21 is fixedly connected to the outer wall of the second link 20. The cutting blade 21 is the component that performs the cutting of the specimen. It opens or closes synchronously with the opening and closing of the second link 20. A collection net 22 is fixedly connected to the bottom of the second link 20. The collection net 22 is used to simultaneously collect and retrieve the specimen at the moment the cutting blade 21 closes and cuts it, preventing specimen loss. The outer walls of the two first links 19 are rotatably connected to the third links 23. The third links 23 are another part of the driving linkage mechanism, hinged to the first links 19, and used to transmit the pulling force from the second pull rod 24 to the first links 19. The two third links 23 are furthest from the first links 19. One end of the slide bar 17 is rotatably connected to a second pull rod 24. The second pull rod 24 gathers the forces from the two third links 23 and acts as the main actuator inside the entire cutting and storage assembly. The side of the second pull rod 24 away from the third links 23 passes through the storage cylinder 16 and is fixedly connected to a first magnetic block 25. The first magnetic block 25 is a non-contact transmission component used to receive the driving force from the external control component. A first spring 26 is sleeved on the outer wall of the slide bar 17. The first spring 26 is used to provide a restoring force. A fixing component is installed inside the storage cylinder 16.
[0024] The fixing assembly includes a fixing cylinder 28, which is fixedly connected to the inner wall of the storage cylinder 16. The fixing cylinder 28 provides installation and guidance for the internal locking component. A limit block 29 is slidably connected inside the fixing cylinder 28. The limit block 29 is a component that can slide inside the fixing cylinder 28 to drive the pin 31. A second spring 30 is fixedly connected to one side of the limit block 29. The second spring 30 provides a normal thrust to the limit block 29 and the pin 31, making them tend to remain in the locked state. The pin 31 is fixedly connected to the other side of the limit block 29. The pin 31 is the component that performs the locking. It extends out of the fixing cylinder 28 under the push of the second spring 30.
[0025] The switching assembly includes a micro motor 11 and an internal gear ring 15. The micro motor 11 is fixedly connected to the inner wall of the sleeve 5 and is the power source of the switching assembly. A gear 12 is fixedly connected to the output end of the micro motor 11. The internal gear ring 15 is fixedly connected to the inner wall of the mounting plate 14. The gear 12 and the internal gear ring 15 mesh with each other. When the fixed micro motor 11 drives the gear 12 to rotate, the gear 12 rotates in its original position, forcing the internal gear ring 15 meshing with it and the mounting plate 14 fixed on it to rotate, thereby realizing the switching.
[0026] The control component includes a housing 32, which is fixedly connected to the outer wall of the housing 1. A sliding plate 33 is slidably connected inside the housing 32. A third pull rod 34 is fixedly connected to the middle of the sliding plate 33. The third pull rod 34 transmits the linear motion of the sliding plate 33 to the second magnetic block 35. The second magnetic block 35 is fixedly connected to the outer wall of the third pull rod 34. The second magnetic block 35 is the execution end of the control component. It attracts the first magnetic block 25 inside the cutting and storage component through magnetic force.
[0027] The inclined plate 6 and the inclined block 8 abut against each other. When the first pull rod 2 moves, the inclined plate 6 on it will contact and push the inclined block 8. The baffle 10 abuts against the inclined block 8. The baffle 10 serves as a fixed limiting point to prevent the inclined block 8 from rotating infinitely under the action of the torsion spring 9, so that it stays at the preset locking or unlocking starting position. One end of the torsion spring 9 is fixedly connected to the outer wall of the inclined block 8, and the other end of the torsion spring 9 is fixedly connected to the inner wall of the housing 1, so that the torsion spring 9 can apply a restoring torque to the inclined block 8, so that it can automatically reset when it is not pushed by the inclined plate 6.
[0028] The second pull rod 24 has a fixing hole 27 on its outer wall. The fixing hole 27 is the engagement point of the locking mechanism and is used to insert the pin 31. The pin 31 passes through the fixing cylinder 28 and engages with the fixing hole 27. Under the action of the second spring 30, the pin 31 is inserted into the fixing hole 27, so that the second pull rod 24 cannot move, thereby locking the cutting mechanism.
[0029] The ends of the two second connecting rods 20 furthest from the first connecting rod 19 abut against the inner wall of the sleeve 5, limiting the cutting mechanism in its retracted state. The inner wall of the sleeve 5 acts as a physical barrier, preventing the cutting blade 21 from opening excessively inside the storage cylinder 16. The second magnetic block 35 and the first magnetic block 25 attract each other. When the operator pushes the third pull rod 34, it moves the second magnetic block 35, simultaneously attracting the first magnetic block 25, thereby pulling the second pull rod 24 and initiating the cutting action. This magnetic non-contact transmission ensures the sealing and decoupling between the rotating and fixed components.
[0030] One end of the first spring 26 is fixedly connected to the outer wall of the slider 18, and the other end of the first spring 26 is fixedly connected to the inner wall of the storage cylinder 16. Under the elastic force of the first spring 26, the slider 18 will always be pushed, so that the two first connecting rods 19 are always in the open position.
[0031] A circular hole is provided on the side of the sleeve 5 away from the connecting shaft 4. The diameter of the circular hole is larger than the width of the storage net 22, ensuring that when the selected cutting and storage component is driven, its storage net 22 can smoothly extend out of the circular hole of the sleeve 5 to perform specimen cutting and retrieval tasks.
[0032] Working principle: When it is necessary to operate on a specimen under digestive endoscopy, the position of the cutting and storage component is first adjusted by the first pull rod 2. The operator pushes the first pull rod 2 towards the specimen. The first pull rod 2 drives the limiting plate 3, the connecting shaft 4 and the sleeve 5 to move synchronously. The cutting and storage component inside the sleeve 5 moves closer to the specimen. During the movement, the inclined plate 6 on the outer wall of the first pull rod 2 contacts the inclined surface of the inclined block 8, pushing the inclined block 8 to overcome the elastic force of the torsion spring 9 and rotate around the rotating shaft 7. At this time, the inclined plate 6 can smoothly pass over the inclined block 8. When the cutting and storage component moves to the front of the specimen, it is confirmed by observation through the digestive endoscope. The first pull rod 2 is stopped, the torsion spring 9 returns to its deformation, and the inclined block 8 is reset, so that the inclined block 8 is re-engaged with the inclined plate 6. The other side of the inclined block 8 still abuts against the baffle 10, realizing the position locking of the first pull rod 2.
[0033] Subsequently, the operator pushes the third lever 34 of the control component, and the slide plate 33 simultaneously moves the second magnetic block 35. The second magnetic block 35 approaches the first magnetic block 25 and generates a magnetic attraction force. After the second magnetic block 35 and the first magnetic block 25 are attracted, the operator pulls the third lever 34. The second magnetic block 35 uses magnetic force to drive the first magnetic block 25 and the second lever 24 to move away from the storage cylinder 16. During this process, the pulling force of the second lever 24 will drive the two third connecting rods 23 to rotate inward, further driving the two first connecting rods 19 to rotate, and driving the two connected storage nets 22 to rotate, thus tightening. During the tightening process, the cutting blade 21 will cut the target tissue sample and cut the sample. The sample is collected inside the storage net 22. When the second connecting rod 20 is fully closed, if the second pull rod 24 is pulled continuously, the slider 18 will slide along the surface of the slide rod 17, so that the storage net 22 is temporarily stored inside the storage tube 16. When the second pull rod 24 is pulled continuously, the fixing hole 27 on its surface will be at the same level as the fixing tube 28. At this time, under the elastic force of the second spring 30, the limiting block 29 pushes the pin 31 into the fixing hole 27 through its own elastic force, thereby fixing the second pull rod 24 and ensuring that the sample inside the storage net 22 will not fall out. After the second pull rod 24 is fixed, the third pull rod 34 is pulled to release the magnetic attraction between the first magnetic block 25 and the second magnetic block 35.
[0034] Finally, the micro motor 11 is started. The gear 12 on the micro motor 11 drives the internal gear ring 15 to rotate through the meshing of the internal gear ring 15, which in turn drives the mounting plate 14 to rotate, replacing the used storage tube 16 with the unused storage tube 16, and repeating the above cutting action to complete multiple samplings without changing the instrument.
Claims
1. A digestive endoscopy specimen resection and recovery device, comprising a housing (1), characterized in that, The housing (1) is slidably connected to a first pull rod (2), and a limit plate (3) is fixedly connected to the outer wall of the first pull rod (2). A connecting shaft (4) is fixedly connected to the side of the limit plate (3) away from the first pull rod (2). A sleeve (5) is fixedly connected to the side of the connecting shaft (4) away from the limit plate (3). A locking component is provided inside the housing (1). A rotating ring (13) is rotatably connected inside the sleeve (5). An installation plate (14) is fixedly connected to the inner wall of the rotating ring (13). Multiple cutting and storage components are fixedly connected to the outer wall of the installation plate (14). A switching component is provided inside the sleeve (5). A control component is provided on the outer wall of the housing (1). The locking assembly includes multiple inclined plates (6), a rotating shaft (7), and a baffle (10). The inclined plates (6) are fixedly connected to the outer wall of the first pull rod (2). The rotating shaft (7) is rotatably connected inside the housing (1). An inclined block (8) is fixedly connected to the outer wall of the rotating shaft (7). A torsion spring (9) is sleeved on the outer wall of the rotating shaft (7). The baffle (10) is fixedly connected to the inner wall of the housing (1).
2. The digestive endoscopy specimen resection and recovery device according to claim 1, characterized in that, The cutting and storage assembly includes at least two storage cylinders (16). The storage cylinders (16) are fixedly connected to the outer wall of the mounting plate (14). Two sliding rods (17) are fixedly connected to the inner wall of the storage cylinders (16). A slider (18) is slidably connected to the outer wall of the sliding rods (17). A first connecting rod (19) is rotatably connected to the top of the slider (18). A second connecting rod (20) is rotatably connected to the ends of the two first connecting rods (19) away from the slider (18). The ends of the two second connecting rods (20) that are close to each other are rotatably connected by bearings. The outer wall of the second connecting rod (20) is fixedly connected to... A cutting blade (21) is attached. A storage net (22) is fixedly connected to the bottom of the second connecting rod (20). A third connecting rod (23) is rotatably connected to the outer wall of each of the two first connecting rods (19). A second pull rod (24) is rotatably connected to the end of each of the two third connecting rods (23) away from the first connecting rod (19). The side of the second pull rod (24) away from the third connecting rod (23) passes through the storage tube (16) and is fixedly connected to a first magnetic block (25). A first spring (26) is sleeved on the outer wall of the slide rod (17). A fixing component is installed inside the storage tube (16).
3. The digestive endoscopy specimen resection and recovery device according to claim 2, characterized in that, The fixing component includes a fixing cylinder (28), which is fixedly connected to the inner wall of the storage cylinder (16). A limiting block (29) is slidably connected inside the fixing cylinder (28). A second spring (30) is fixedly connected to one side of the limiting block (29), and a pin (31) is fixedly connected to the other side of the limiting block (29).
4. The digestive endoscopy specimen resection and recovery device according to claim 3, characterized in that, The switching assembly includes a micro motor (11) and an internal gear ring (15). The micro motor (11) is fixedly connected to the inner wall of the sleeve (5). A gear (12) is fixedly connected to the output end of the micro motor (11). The internal gear ring (15) is fixedly connected to the inner wall of the mounting plate (14). The gear (12) and the internal gear ring (15) mesh with each other.
5. The digestive endoscopy specimen resection and recovery device according to claim 4, characterized in that, The control component includes a housing (32), which is fixedly connected to the outer wall of the housing (1). A sliding plate (33) is slidably connected inside the housing (32). A third pull rod (34) is fixedly connected to the middle of the sliding plate (33). A second magnetic block (35) is fixedly connected to the outer wall of the third pull rod (34).
6. The digestive endoscopy specimen resection and recovery device according to claim 1, characterized in that, The inclined plate (6) and the inclined block (8) abut against each other, the baffle (10) and the inclined block (8) abut against each other, one end of the torsion spring (9) is fixedly connected to the outer wall of the inclined block (8), and the other end of the torsion spring (9) is fixedly connected to the inner wall of the housing (1).
7. The digestive endoscopy specimen resection and recovery device according to claim 3, characterized in that, The second pull rod (24) has a fixing hole (27) on its outer wall, and the pin (31) passes through the fixing cylinder (28) and engages with the fixing hole (27).
8. The digestive endoscopy specimen resection and recovery device according to claim 5, characterized in that, The two second connecting rods (20) abut against the inner wall of the sleeve (5) at the ends away from the first connecting rod (19), and the second magnetic block (35) and the first magnetic block (25) attract each other.
9. The digestive endoscopy specimen resection and recovery device according to claim 2, characterized in that, One end of the first spring (26) is fixedly connected to the outer wall of the slider (18), and the other end of the first spring (26) is fixedly connected to the inner wall of the storage cylinder (16).
10. The digestive endoscopy specimen resection and recovery device according to claim 2, characterized in that, The sleeve (5) has a circular hole on the side away from the connecting shaft (4), and the diameter of the circular hole is larger than the width of the storage net (22).