Gastrointestinal early cancer lesion specimen auxiliary observation device

Abstract

The application discloses a kind of gastrointestinal early cancer pathological specimen auxiliary observation devices, including bottom plate, the mounting seat of detachable connection for outside specimen containment and to the specimen is fixed and the mounting structure for adjusting mounting seat on the relative position of bottom plate in the width direction of bottom plate and mounting seat is fixed on the bottom plate, the frame plate is erected at both ends of the bottom plate, sliding rail is arranged between two frame plates, the length direction of sliding rail is consistent with the length direction of bottom plate, sliding block is movably arranged on the sliding rail along the length direction of sliding rail, and endoscope assembly for outside observer to observe the specimen in mounting seat is arranged on the sliding block, the fixing assembly for fixing and limiting sliding block after sliding is arranged on the sliding rail.The application solves the problem that the volume of traditional gastrointestinal early cancer postoperative specimen observation device is too large, operation is inconvenient, and the cost is too high due to too many electronic components and parts.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary device technology, specifically to an auxiliary observation device for early gastrointestinal cancer lesion specimens. Background Technology

[0002] After ESD surgery for early gastrointestinal cancer, external magnification of the lesion specimen is a core step in clarifying the integrity of the resection margin and assessing the depth of lesion invasion. It directly determines the accuracy of the pathological diagnosis and the formulation of subsequent treatment plans. Therefore, there is an urgent clinical need for a specimen observation device with strong adaptability.

[0003] Currently, the clinically used devices for observing early gastrointestinal cancer specimens are mainly divided into two categories: one is an integrated benchtop device, which is usually equipped with electronic imaging systems, electric adjustment rails and other components. Although it can realize the observation function, it is bulky and occupies a lot of space, making it difficult to flexibly arrange in the limited space of the pathology department or emergency room, and it is also inconvenient to move and transport. The other is a simple handheld auxiliary tool, which is smaller in size, but lacks a stable specimen fixation and endoscope positioning structure. During the observation process, the image is easily blurred due to shaking, which affects the diagnostic accuracy.

[0004] Meanwhile, existing devices have several shortcomings: First, the specimen mounting position of most devices is fixed and cannot be flexibly adjusted along the width of the base plate. When observing different areas of the specimen, the specimen needs to be moved manually, which can easily cause specimen damage or positional displacement, increasing the risk of diagnostic errors. Second, mainstream devices generally rely on electronic endoscopes, motor drives, and other electronic components and complex parts, which not only result in high production and maintenance costs, significantly increasing the procurement burden on primary healthcare institutions, but also pose risks such as electronic component failure and equipment damage during sterilization, limiting their adaptability. Third, the operation procedures of some devices are cumbersome, requiring professional training before they can be used proficiently, reducing the efficiency of clinical specimen observation and making it difficult to match the rapid clinical pace of postoperative assessment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an auxiliary observation device for early gastrointestinal cancer lesion specimens, which solves the problems of excessive size, inconvenient operation, and high cost caused by excessive electronic components and parts in traditional early gastrointestinal cancer postoperative specimen observation devices.

[0006] To achieve the above objectives, the present invention provides an auxiliary observation device for early gastrointestinal cancer lesion specimens, comprising a base plate, on which a mounting seat for accommodating and fixing an external specimen is detachably connected, and an installation structure for adjusting the relative position of the mounting seat on the base plate along the width direction of the base plate and fixing the mounting seat to the base plate. Frame plates are mounted at both ends of the base plate, and a slide rail is provided between the two frame plates. The length direction of the slide rail is aligned with the length direction of the base plate. A sliding block is movably mounted on the slide rail along the length direction of the slide rail, and an endoscope assembly is mounted on the sliding block for an external observer to observe the specimen in the mounting seat. A fixing component is provided on the slide rail for fixing and limiting the sliding block after it has slid.

[0007] The advantages of adopting the above technical solution are as follows: The base plate, as the fundamental load-bearing component of the device, has a flat design that adapts to different operating surfaces such as those in pathology departments and operating rooms, ensuring the horizontal stability of the device after placement and preventing endoscope tilting due to uneven surfaces during observation; the detachable mounting base not only facilitates rapid specimen placement and removal but also adapts to different sizes of clinical specimen boxes without requiring additional replacement of adapter parts, thus improving the device's versatility; the mounting structure allows adjustment of the relative position of the mounting base along the width of the base plate, enabling different areas of the specimen to actively adapt to the endoscope's observation range, reducing operational errors caused by frequent endoscope repositioning. Simultaneously, this structure allows for stable fixing of the mounting base through simple operation, preventing specimen displacement during observation; the symmetrically mounted support plates at both ends of the base plate provide uniform support for the slide rail, ensuring the slide rail remains level. The endoscope is positioned horizontally to prevent viewing angle deviations caused by the tilt of the slide rail. The cooperation between the slide rail and the sliding block allows the endoscope assembly to move flexibly along the length of the base plate. Combined with the width adjustment of the mounting base, it can fully cover all areas of the specimen, allowing observation without manual specimen movement. The aforementioned fixing components can achieve instant positioning after the sliding block is moved. Compared with the shaking problem of traditional handheld endoscopes, this positioning function significantly improves the clarity of the observed images. Through the design of the above structure, the overall structure is simplified, eliminating redundant electronic components and complex transmission parts. This reduces the production and maintenance costs of the device and avoids potential hazards such as electronic component failure and lubricant leakage. At the same time, the operation process is simple and intuitive, requiring no professional training to use proficiently. It effectively solves the problems of excessive size, inconvenient operation, and high cost of traditional devices, and is suitable for the needs of clinical diagnosis and treatment and primary healthcare institutions.

[0008] The invention further comprises: a sliding groove formed along the length of the slide rail; a sliding block consisting of a horizontal part and a vertical part, with the horizontal and vertical parts connected perpendicularly to each other; the horizontal part being positioned below the slide rail; the vertical part being inserted into the sliding groove and sliding along the length of the slide rail; the horizontal part partially extending to one side of the slide rail and forming an observation end; the endoscope assembly being detachably connected to the observation end; an adjustment groove formed along the length of the slide rail sidewall, communicating with the sliding groove; and an adjustment shaft provided on the vertical part. The adjusting shaft has an adjusting groove at its end and a turning end for external users to turn. An adjusting hole is provided on the vertical part. The starting end of the adjusting shaft is movably disposed in the adjusting hole along the axis of the adjusting hole. The axis of the adjusting hole is perpendicular to the length direction of the adjusting groove. A return spring is sleeved on the adjusting shaft. The starting end of the return spring is connected to the bottom wall of the adjusting hole, and the ending end of the return spring is connected to the outer peripheral wall of the starting end of the adjusting shaft. When the adjusting shaft is not subjected to external force, the return spring applies a force toward the bottom wall of the adjusting hole to the adjusting shaft.

[0009] The advantages of adopting the above technical solution are: the matching design of the sliding groove on the slide rail and the vertical part of the sliding block ensures the guiding accuracy of the sliding block moving along the length of the slide rail, avoiding problems such as jamming and offset during sliding, and thus preventing unexpected tilting of the observation angle when the endoscope assembly moves with the sliding block; while the horizontal part of the sliding block is located below the slide rail, this layout does not obstruct the endoscope's observation field of view of the specimen, and provides a stable mounting base for the endoscope assembly. The observation end formed by its partial extension adopts a detachable connection method, which facilitates the quick replacement and cleaning and disinfection of the endoscope assembly and is compatible with the switching of endoscopes with different magnifications. Requirements: The adjustment groove on the side wall of the aforementioned slide rail cooperates with the adjustment shaft to achieve manual control of the sliding block. This manual operation does not rely on external energy sources such as power or air supply, and can be used normally in scenarios without external energy sources, such as operating rooms and mobile medical vehicles. Furthermore, the setting of the adjustment hole and the return spring ensures that the adjustment shaft remains in the reset state when not subjected to external force. The aforementioned purely mechanical structure has no complex parts such as electronic components and lubrication systems, and can be directly wiped and disinfected with alcohol without problems such as damage to electronic components or contamination of specimens by lubricating oil. It is compatible with the aseptic operation standards of medical scenarios. At the same time, the number of parts and the simple structure significantly reduce the probability of failure and maintenance costs.

[0010] The present invention further comprises: a first protrusion strip is provided on the top and bottom walls of the adjusting groove along the length of the slide rail; the first protrusion strip is provided with a first tooth groove along the length of the adjusting groove; the fixing structure includes two opposing first abutment plates and two first protrusion teeth respectively disposed on the two first abutment plates and used to mesh with adjacent first tooth grooves; both first abutment plates are disposed on the outer peripheral wall of the adjusting shaft; the adjusting shaft is movably disposed on the vertical part so that the first protrusion teeth can mesh or separate from the first tooth groove when the adjusting shaft moves.

[0011] The advantages of adopting the above technical solution are as follows: The first protruding strips on the top and bottom walls of the adjusting groove increase the structural strength of the first tooth groove, preventing wear and deformation caused by frequent meshing operations, and ensuring the positioning accuracy of the device after long-term use. The first tooth grooves are continuously arranged along the length of the slide rail, providing a uniform base for positioning points. Through two opposing first abutment plates and first protruding teeth, they can simultaneously mesh with the first tooth grooves on the top and bottom walls of the adjusting groove. Compared to a single-direction positioning structure, this double-meshing method restricts the displacement of the sliding block from both upper and lower directions, significantly improving the stability after positioning and preventing displacement of the sliding block due to slight collisions during observation. When it is necessary to adjust the position of the sliding block, only the... Pulling the adjusting shaft outward stretches the return spring, causing the adjusting shaft to shift and the first convex tooth to separate from the first tooth groove, thus enabling the sliding block to move. When the adjusting shaft is released, the return spring retracts, and the first convex tooth automatically engages with the corresponding first tooth groove. The entire operation requires no additional tools, and the outward pulling action is less prone to accidental activation. Compared with traditional methods such as set screw locking and bolt fixing, the operation steps are greatly simplified, improving the efficiency of specimen observation. The above-mentioned purely mechanical meshing structure does not require the addition of lubricating grease, eliminating the problem of lubricating oil leakage and specimen contamination. At the same time, the structure has few gaps and no dead corners, making cleaning and disinfection more convenient. It is suitable for the aseptic operation requirements of medical scenarios, and the components have excellent wear resistance, eliminating the need for frequent replacement of vulnerable parts and further reducing the operating cost of the device.

[0012] The present invention further comprises: a limiting protrusion is provided on the left side of the first tooth groove, the height of the limiting protrusion is greater than the height of the first tooth groove, and the outer wall surface of the limiting protrusion is a limiting surface for abutting and cooperating with the left side wall of the first abutting plate when the adjusting shaft is subjected to the force applied by the reset spring.

[0013] The advantages of adopting the above technical solution are as follows: The design of the limiting protrusion on the left side of the first tooth groove, with a height greater than the height of the first tooth groove, allows the left side wall of the first abutting plate to first form an abutment with the limiting surface of the limiting protrusion when the adjusting shaft returns to its original position under the force of the return spring. This then completes the meshing operation between the first tooth and the first tooth groove. This design avoids the first tooth from being forcibly stuck between adjacent teeth due to excessive adjustment shaft reset, preventing tooth deformation and wear, and ensuring the service life of the tooth groove and the tooth. Simultaneously, the abutment of the limiting surface precisely limits the reset range of the adjusting shaft, ensuring that the first tooth is always in the optimal position for meshing with the first tooth groove, preventing the first tooth from being damaged due to reset offset. The teeth only partially engage with the tooth groove, thus preventing problems such as loose positioning and displacement of the sliding block. The above-mentioned limiting structure eliminates the need for additional positioning sensors, adjustment knobs, or other components. Precise positioning can be achieved solely through the dimensional matching of the mechanical structure, which simplifies the number of components in the device and avoids the debugging and maintenance of electronic components. At the same time, the unlocking method of pulling outward on the adjustment shaft and the return spring's retraction ensure that the engagement position remains consistent after each reset, reducing positioning deviations caused by differences in human operation. This guarantees the accuracy of the observation position for different users, adapts to the clinical need for precise observation of small lesion areas in specimens (such as early cancer margins), and improves the consistency and reliability of diagnostic results.

[0014] The present invention further comprises: a mating protrusion is provided on the right side of the first tooth groove, and the mating protrusion is provided with a mating tooth groove along the length direction of the adjustment groove; two mating plates are provided on the adjustment shaft, and each of the two mating plates is provided with a mating protrusion, and the two mating protrusions correspond to the two mating tooth grooves respectively; when the first protrusion meshes with the first tooth groove, the mating protrusion meshes with the corresponding mating tooth groove; when the first protrusion meshes with the first tooth groove, the left side wall of the mating plate abuts against the right side wall of the first protrusion.

[0015] The advantages of adopting the above technical solution are as follows: The mating protrusion and mating groove on the right side of the first tooth groove form a second set of meshing structures with the mating plate and mating protrusion on the adjusting shaft. When the adjusting shaft is not subjected to external force, the return spring retracts, driving the first protrusion to mesh with the first tooth groove, simultaneously driving the mating protrusion to mesh with the corresponding mating groove. This dual meshing method can form positioning constraints on the adjusting shaft from different directions, preventing slight wobbling of the sliding block along the width of the adjusting groove, further improving the stability after positioning. Furthermore, the abutting fit between the left side wall of the mating plate and the right side wall of the first protrusion can limit the lateral displacement of the mating plate during meshing, preventing the mating protrusion from shifting laterally under force, ensuring precise meshing between the mating protrusion and the mating groove, and preventing tooth damage. The structure suffers from wear due to misalignment. The aforementioned structure, without adding operational steps, allows for simultaneous separation and engagement of the two meshing structures through a single action: pulling the adjusting shaft outward (reset spring stretching) and releasing it (spring retraction), without increasing operational complexity. Compared to the positioning gap problem of a single meshing structure, this dual-constraint structure can control the positional deviation of the endoscope components to a smaller range, adapting to the observation needs of millimeter-level resection margins and focal lesions in early gastrointestinal cancer postoperative specimens, ensuring clarity of observation details. Simultaneously, the design of two meshing structures can distribute force, preventing excessive wear of a single tooth groove due to long-term stress, improving the overall service life of the device, and reducing the frequency and cost of component replacement.

[0016] The invention further comprises: a second protrusion strip is provided on both the top and bottom walls of the adjusting groove along the length of the slide rail; the second protrusion strip is provided with a second tooth groove along the length of the adjusting groove; the fixing structure includes two opposing second abutment plates and two second protrusion teeth respectively disposed on the two second abutment plates for meshing with adjacent second tooth grooves; both second abutment plates are disposed on the outer peripheral wall of the adjusting shaft; when the adjusting shaft moves, the second protrusion teeth mesh with or separate from the second tooth grooves; the first tooth groove is composed of a plurality of first teeth continuously and evenly arranged along the length of the slide rail; the second tooth groove is composed of a plurality of second teeth continuously and evenly arranged along the length of the slide rail; the plurality of first teeth correspond one-to-one with the plurality of second teeth, and each first tooth is offset from the corresponding second tooth.

[0017] The advantages of adopting the above technical solution are: the second convex strips set on the top and bottom walls of the adjusting groove are arranged parallel to and independently formed with the first convex strip, and the two do not interfere with each other, providing stable structural support for the second tooth groove and the first tooth groove respectively, ensuring the independent working accuracy of the two sets of fixed structures; the second tooth groove and the first tooth groove are continuously and evenly arranged along the length of the slide rail, forming two sets of independent positioning point systems, corresponding to two unrelated fixing methods, namely, two oppositely arranged second abutment plates and second convex teeth, forming an independent second fixing structure, which forms a selective matching relationship with the first fixing structure of the first convex tooth and the first tooth groove, and the adjusting shaft can selectively engage with the first tooth groove through the first convex tooth and the first tooth groove, or the second convex tooth and the first tooth groove. The sliding block is fixed by two toothed meshing. The two fixing methods are independent and reliable, avoiding positioning failure due to the failure of a single structure. Because the teeth of the first tooth need to have a certain width to ensure structural strength, the sliding block can only stay at the directional position corresponding to the first tooth through the first fixing method. The stopping point is relatively limited by the distribution of the teeth. However, the one-to-one correspondence and staggered design of the second tooth with the first tooth allows the positioning point of the second tooth to accurately fill the gap between the adjacent first teeth. This allows the sliding block to stay in the position that the first fixing method cannot cover through the second fixing method. It is equivalent to adding supplementary points on the basis of the original positioning points, significantly expanding the range of the sliding block's stopping position and making the observation point coverage more comprehensive. When switching the fixation method or adjusting the position is required, simply pull the adjusting shaft outward to stretch the return spring, which simultaneously drives the first and second convex teeth to separate from their corresponding grooves. No step-by-step operation is needed, making switching convenient and unaffected by operational smoothness. This offset design eliminates the need to reduce the size of the teeth, avoiding wear and deformation problems caused by excessively thin teeth. It achieves a higher density of positioning points while ensuring structural strength. Compared to the limitations of traditional single fixation methods, this significantly improves observation adaptability and facilitates precise capture of small lesions in the specimen. Furthermore, the two independent fixation structures can serve as backups for each other. Even if one set experiences slight wear, the other can still ensure positioning effectiveness, improving the device's fault tolerance and lifespan, and adapting to the long-term, frequent specimen observation needs of clinical practice.

[0018] The invention further comprises: a receiving groove for accommodating external specimens is provided on the mounting base; a plurality of mounting holes are evenly distributed on the outer peripheral wall of the mounting base and are all connected to the receiving groove; a mounting shaft is threaded into each mounting hole; the beginning end of the mounting shaft passes through the receiving groove and is provided with a clamping shaft for abutting against the outer wall of the external specimen; the clamping shaft is made of rubber.

[0019] The advantages of adopting the above technical solution are as follows: the receiving groove on the mounting base is sized to fit the specifications of commonly used clinical specimens, providing a stable receiving space for the specimens and preventing them from tipping over or shifting during observation; the numerous mounting holes evenly distributed around the receiving groove on the outer peripheral wall of the mounting base ensure a uniform distribution of the force exerted by the clamping shaft on the specimen during adjustment, preventing excessive local force that could damage or deform the fragile mucosal specimens postoperatively; the threaded connection between the mounting holes and the mounting shaft allows for fine-tuning of the clamping shaft position, facilitating precise control of the clamping force according to the size and shape of the specimen, ensuring both stable fixation of the specimen and preventing over-clamping. Compression can damage the specimen, but the rubber clamping shaft at the beginning of the mounting shaft has elastic deformation properties that can conform to the surface of specimens of different shapes, increasing the contact area with the specimen and improving the stability of fixation. At the same time, the cushioning effect of the rubber material can avoid damage to the specimen from rigid contact, ensuring the integrity of the specimen and thus improving the accuracy of observation results. The operation process of the above-mentioned fixation structure is simple and intuitive. The specimen can be fixed and released by simply turning the mounting shaft, without the need for professional tools. It is suitable for the pace of rapid postoperative observation in clinical practice. In addition, the rubber clamping shaft can be sterilized at high temperature to avoid cross-infection. The detachable design of the mounting shaft facilitates cleaning and maintenance, reducing the contamination problem caused by specimen residue.

[0020] The invention further comprises: a flat mounting base with a mounting plate extending from its outer wall; the bottom wall of the mounting plate being flush with the bottom wall of the mounting base; an extension portion extending from the outer wall of the base plate, the top surface of which serves as a placement surface for contacting the bottom wall of the mounting plate; a positioning shaft vertically connected to both ends of the extension portion; a pressure plate movably disposed between the two positioning shafts; a through hole for the positioning shaft to pass through on the pressure plate corresponding to the positions of the two positioning shafts; a pressing surface for pressing against the top wall of the mounting plate; an anti-detachment block with a diameter larger than the through hole diameter at the top of the positioning shaft; a compression spring sleeved on the positioning shaft; the starting end of the compression spring connected to the bottom wall of the anti-detachment block; and the end of the compression spring abutting against the top wall of the pressure plate.

[0021] The advantages of adopting the above technical solution are: the flat mounting base in the above technology has a height design that lowers the overall center of gravity of the device, preventing the device from tipping over due to an excessively high center of gravity. Simultaneously, the flat structure does not obstruct the endoscope's field of view, ensuring comprehensive observation. Furthermore, the mounting plate extending from the outer wall of the mounting base has its bottom wall flush with the bottom wall of the mounting base, allowing for a complete fit with the placement surface of the extension, ensuring the horizontal stability of the mounting base after placement. The symmetrically arranged positioning shafts vertically connected at both ends of the extension ensure uniform force distribution on the pressure plate, preventing uneven force distribution on the mounting plate due to pressure plate tilting. The perforations on the plate, in conjunction with the positioning shaft, ensure both the vertical freedom of movement of the pressure plate and limit its lateral displacement. The diameter of the anti-detachment block is larger than that of the perforation, preventing the pressure plate from falling off during operation and ensuring the integrity of the structure. The clamping spring sleeved on the positioning shaft has a preload that drives the bottom wall of the pressure plate to press stably against the top wall of the mounting plate, achieving quick fixation of the mounting base. When the position of the mounting base needs to be adjusted, simply lift the pressure plate upwards to release the fixation. The operation process is simple and efficient, significantly reducing the installation and removal time of the mounting base compared to traditional bolt fixing and buckle locking methods.

[0022] The present invention further comprises: a first limiting tooth groove is provided on the top wall of the mounting plate, the first limiting tooth groove being composed of a plurality of third teeth arranged continuously and evenly along the length direction of the slide rail; a first positioning tooth groove is provided on the bottom wall of the pressure plate for meshing with the first limiting tooth groove, the first positioning tooth groove being composed of a plurality of fourth teeth arranged continuously and evenly along the length direction of the slide rail; and the number of third teeth is less than the number of fourth teeth.

[0023] The advantages of adopting the above technical solution are as follows: The first limiting groove on the top wall of the mounting plate has several third teeth that are continuously and evenly arranged along the length of the slide rail, providing a uniform point base for positioning the mounting seat along its length. The first positioning groove on the bottom wall of the pressure plate has several fourth teeth whose tooth profiles match the third teeth, forming a tight meshing fit. This groove meshing structure can limit the displacement of the mounting seat along the length of the slide rail. Combined with the pressing action of the pressure plate, it strengthens the positioning stability of the mounting seat and prevents displacement due to slight collisions during observation. The number of the third teeth is less than that of the first limiting groove. The four-tooth design increases the adaptability of the engagement point, avoiding misalignment of the teeth due to minor adjustments in the mount position, and ensuring stable engagement of the mount in different positions. With the above structure, no additional locking components are needed; the engagement and positioning of the teeth can be completed simply by pressing the pressure plate. The operation process is simple and intuitive. At the same time, the tooth engagement positioning method is significantly more stable than the traditional friction fixation, ensuring that the relative position of the specimen and the endoscope is fixed, avoiding repeated observation of the same lesion area due to mount displacement, reducing diagnostic time, and improving observation efficiency.

[0024] The present invention further comprises: a second limiting tooth groove is provided on the placement surface, the second limiting tooth groove being composed of a plurality of fifth teeth arranged continuously and evenly along the width direction of the slide rail; a second positioning tooth groove is provided on the bottom wall of the mounting plate for meshing with the second limiting tooth groove, the second positioning tooth groove being composed of a plurality of sixth teeth arranged continuously and evenly along the width direction of the slide rail; and the number of fifth teeth is greater than the number of sixth teeth.

[0025] The advantages of adopting the above technical solution are as follows: The second limiting groove on the extension surface has several fifth teeth that are continuously and evenly arranged along the width direction of the slide rail, providing a uniform point base for positioning the mounting base in the width direction. The second positioning groove on the bottom wall of the mounting plate has several sixth teeth whose tooth profiles match the fifth teeth, forming a tight meshing fit. This groove meshing structure can restrict the displacement of the mounting base along the width direction of the slide rail. Combined with the meshing positioning of the first limiting groove, it forms a two-dimensional positioning constraint, comprehensively strengthening the fixing effect of the mounting base. The design that the number of fifth teeth is greater than the number of sixth teeth can provide finer... The close spacing of the positioning points facilitates precise fine-tuning of the mounting base along its width, adapting to the observation needs of different areas of the specimen. This structural design, combined with the width adjustment function of the mounting structure, ensures both the stability of the adjusted mounting base and improves the accuracy of the adjustment, preventing deviations in the endoscope's viewing angle due to mounting base displacement. Furthermore, the toothed meshing structure requires no additional operation; simply placing the mounting plate on the extension surface and pressing it against the pressure plate completes the meshing and positioning process. The operation is simple and efficient. The toothed structure also boasts excellent wear resistance, preventing excessive wear over long-term use and ensuring stable positioning accuracy. Attached Figure Description

[0026] Figure 1 This is a three-dimensional view of the present invention in the state of the first protrusion tooth engaging with the first tooth groove. Figure 2 for Figure 1 A partial 3D view of the interior of the middle slide rail; Figure 3 for Figure 2 A sectional view; Figure 4 This is a three-dimensional view of the present invention in the state of the second convex tooth engaging with the second tooth groove; Figure 5 for Figure 4 A partial 3D view of the interior of the middle slide rail; Figure 6 for Figure 5 A sectional view; Figure 7 This is a partial three-dimensional perspective view of the sliding block and its mating structure in this invention; Figure 8This is a partial side view of the slide rail and its linkage structure in this invention; Figure 9 for Figure 8 A magnified view of part A in the middle; Figure 10 This is a three-dimensional view of the present invention after the pressure plate has been removed. Detailed Implementation

[0027] This invention provides an auxiliary observation device for early gastrointestinal cancer lesion specimens, comprising a base plate 1. A mounting seat 2 for accommodating and fixing an external specimen is detachably connected to the base plate 1, along with an installation structure for adjusting the relative position of the mounting seat 2 on the base plate 1 along its width and fixing the mounting seat 2 to the base plate 1. Frame plates 3 are mounted at both ends of the base plate 1, and a slide rail 31 is provided between the two frame plates 3. The length direction of the slide rail 31 is aligned with the length direction of the base plate 1. A sliding block 4 is movably mounted on the slide rail 31 along its length, and an endoscope assembly 41 is mounted on the sliding block 4 for an external observer to observe the specimen in the mounting seat 2. The slide rail 31 is provided with a mechanism for adjusting the relative position of the sliding block 4 after it slides. A fixing component for fixing and limiting the sliding block 4. A slide rail 31 has a groove 32 along its length. The sliding block 4 consists of a horizontal part 42 and a vertical part 43, with the horizontal part 42 and the vertical part 43 connected perpendicularly to each other. The horizontal part 42 is positioned below the slide rail 31. The vertical part 43 is inserted into the groove 32 and slides along the length of the slide rail 31 within the groove 32. The horizontal part 42 partially extends to one side of the slide rail 31 and forms an observation end 421. The endoscope assembly 41 is detachably connected to the observation end 421. An adjustment groove 33 is formed along the length of the side wall of the slide rail 31, communicating with the groove 32. The vertical part 43 is provided with… An adjusting shaft 5 has an adjusting groove 33 at its end, forming a toggle end 51 for external users to operate. An adjusting hole 431 is provided on the vertical part 43. The starting end of the adjusting shaft 5 is movably disposed in the adjusting hole 431 along its axial direction. The axial direction of the adjusting hole 431 is perpendicular to the length direction of the adjusting groove 33. A return spring 52 is sleeved on the adjusting shaft 5. The starting end of the return spring 52 is connected to the bottom wall of the adjusting hole 431, and the ending end of the return spring 52 is connected to the outer peripheral wall of the starting end of the adjusting shaft 5. When the adjusting shaft 5 is not subjected to external force, the return spring 52 applies a force towards the bottom wall of the adjusting hole 431. The adjusting groove 33... Both the top and bottom walls of the slide rail 31 have first protrusions 34 along their length. Each first protrusion 34 has a first toothed groove 341 along its length. The fixing structure includes two opposing first abutment plates 53 and two first protruding teeth 531 disposed on the two first abutment plates 53 and used to engage with adjacent first toothed grooves 341. Both first abutment plates 53 are disposed on the outer peripheral wall of the adjusting shaft 5. The adjusting shaft 5 is movably disposed on the vertical part 43 to achieve engagement or disengagement of the first protruding teeth 531 with the first toothed grooves 341 when the adjusting shaft 5 moves. A limiting protrusion 35 is provided on the left side of the first toothed groove 341, and the height of the limiting protrusion 35 is greater than the height of the first toothed groove 341.The outer wall surface of the limiting protrusion 35 is a limiting surface 351 used to abut against the left side wall of the first abutment plate 53 when the adjusting shaft 5 is subjected to the force applied by the return spring 52. A mating protrusion is provided on the right side of the first tooth groove 341, and the mating protrusion has a mating tooth groove 352 along the length direction of the adjusting groove 33. Two mating plates 54 are provided on the adjusting shaft 5, and each of the two mating plates 54 is provided with a mating tooth 541. The two mating teeth 541 correspond to the two mating tooth grooves 352 respectively. When the first tooth 531 meshes with the first tooth groove 341, the mating tooth 541 meshes with the corresponding mating tooth groove 352. When the first tooth 531 meshes with the second tooth groove 361, the left side wall of the mating plate 54 abuts against the right side wall of the first protrusion 34. The adjustment groove 33 is configured such that a second protrusion 36 is formed on both the top and bottom walls along the length of the slide rail 31, and the second protrusion 36 is formed with a second toothed groove 361 along the length of the adjustment groove 33. The fixing structure includes two opposing second abutment plates 55 and two second protruding teeth 551 respectively disposed on the two second abutment plates 55 for meshing with the adjacent second toothed groove 361. Both second abutment plates 55 are disposed on the outer peripheral wall of the adjustment shaft 5. When the adjustment shaft 5 moves, the second protruding teeth 551 mesh with or separate from the second toothed groove 361. The first toothed groove 341 is composed of a plurality of first teeth 342 continuously and evenly arranged along the length of the slide rail 31, and the second toothed groove 361 is composed of a plurality of first teeth 342 continuously and evenly arranged along the length of the slide rail 31. The second tooth 362 is formed, and a plurality of first teeth 342 correspond one-to-one with a plurality of second teeth 362, with each first tooth 342 being offset from the corresponding second tooth 362. The mounting base 2 has a receiving groove 21 for accommodating external specimens. A plurality of mounting holes are evenly distributed on the outer peripheral wall of the mounting base 2, and the mounting holes are all connected to the receiving groove 21. Each mounting hole is threaded with a mounting shaft 22. The beginning end of the mounting shaft 22 passes through the receiving groove 21 and is provided with a clamping shaft 23 for abutting against the outer wall of the external specimen. The clamping shaft 23 is made of rubber. The mounting base 2 is flat and a mounting plate 24 extends from the outer wall of the mounting base 2. The bottom wall of the mounting plate 24 is flush with the bottom wall of the mounting base 2. An extension portion 11 extends from the outer wall of plate 1, and the top wall surface of the extension portion 11 is a placement surface for contacting the bottom wall of mounting plate 24. Positioning shafts 12 are vertically connected to both ends of the extension portion 11. A pressure plate 6 is movably disposed between the two positioning shafts 12. The pressure plate 6 has through holes 61 corresponding to the positions of the two positioning shafts 12 for the positioning shafts 12 to pass through. The bottom wall of the pressure plate 6 is a pressing surface for pressing against the top wall of mounting plate 24. An anti-detachment block 121 is provided at the top of each positioning shaft 12, and the diameter of the anti-detachment block 121 is larger than the diameter of the through hole 61. A compression spring 122 is sleeved on the positioning shaft 12. The starting end of the compression spring 122 is connected to the bottom wall of the anti-detachment block 121, and the end of the compression spring 122 abuts against the top wall of the pressure plate 6.The mounting plate 24 has a first limiting groove 241 on its top wall, which is composed of several third teeth arranged continuously and evenly along the length of the slide rail 31. The pressure plate 6 has a first positioning groove 62 on its bottom wall for engaging with the first limiting groove 241, which is composed of several fourth teeth arranged continuously and evenly along the length of the slide rail 31. The number of third teeth is less than the number of fourth teeth. The placement surface has a second limiting groove 111, which is composed of several fifth teeth arranged continuously and evenly along the width of the slide rail 31. The mounting plate 24 has a second positioning groove 242 on its bottom wall for engaging with the second limiting groove 111, which is composed of several sixth teeth arranged continuously and evenly along the width of the slide rail 31. The number of fifth teeth is greater than the number of sixth teeth.

[0028] Operating Instructions for the Auxiliary Observation Device for Early Gastrointestinal Cancer Specimens: 1. Equipment preparation: Before use, wipe the entire device (including base plate, mounting base, slide rail, sliding block, endoscope components, etc.) with alcohol to ensure that there are no stains, residual specimens and bacterial growth. After the alcohol evaporates, place it on a flat operating surface to ensure that the device is level and stable.

[0029] 2. Mounting Base Assembly: Lift the pressure plate on the extension of the base plate upwards. The clamping spring is compressed, aligning the mounting plate of the flat mounting base with the placement surface of the extension. This allows the second positioning groove on the bottom wall of the mounting plate to initially engage with the second limiting groove on the placement surface. Release the pressure plate, and the clamping spring returns to its original position, driving the bottom wall of the pressure plate to press against the top wall of the mounting plate. At this point, the first positioning groove on the bottom wall of the pressure plate engages with the first limiting groove on the top wall of the mounting plate, completing the initial fixing of the mounting base. If it is necessary to adjust the position of the mounting base along the width of the base plate, lift the pressure plate again, move the mounting base laterally to the target position, and then release it. Precise positioning is achieved through the meshing of the grooves.

[0030] 3. Specimen fixation procedure: Place the lesion specimen from the early gastrointestinal cancer ESD procedure smoothly into the receiving slot of the mounting base. According to the size and shape of the specimen, screw the mounting shaft on the outer peripheral wall of the mounting base to move the rubber clamping shaft into the receiving slot until the clamping shaft is evenly against the outer wall of the specimen, ensuring that the specimen is firmly fixed and undamaged, and avoiding displacement during observation.

[0031] 4. Endoscope assembly installation: Fix the compatible optical magnifying endoscope to the observation end of the sliding block in a detachable manner (it has been installed on the sliding block before observation. The detachable connection method is existing technology, such as bolt connection, etc. Since it is existing technology, it will not be described in detail). Adjust the endoscope angle so that the lens is vertically facing the receiving groove of the mounting base, ensuring that the endoscope eyepiece end is easy for the user to observe visually and that the lens is not obstructed.

[0032] 5. Adjustment of Observation Position: During observation, if it is necessary to move the sliding block, pull the adjusting shaft outward. The return spring is stretched, which simultaneously drives the first convex tooth to separate from the first tooth groove and the second convex tooth to separate from the second tooth groove, thus releasing the positioning constraint. Push the adjusting shaft to move the sliding block along the length of the slide rail. According to the specimen observation requirements, select the appropriate fixing method: If it is necessary to stay at the original positioning point, release the adjusting shaft. The return spring retracts and drives the first convex tooth to engage with the first tooth groove to achieve fixing. If it is necessary to stay at the supplementary point between adjacent first teeth, adjust the sliding block to the corresponding position and then release the adjusting shaft. The second convex tooth will engage with the second tooth groove to complete the fixing. If it is necessary to adjust the position of the mounting base in the width direction, repeat step 2. Through the coordinated adjustment of the slide rail length direction and the base plate width direction, the full area coverage observation of the specimen can be achieved.

[0033] The aforementioned endoscope assembly is a purely optical existing technology structure without electronic imaging and control components. Its core consists of a body, an optical lens group, an eyepiece end, and a connecting part. The body is a medical-grade rigid tubing, with a magnifying lens group composed of multiple optical lenses coaxially mounted inside. The lens group is arranged along a fixed optical path to achieve electronic magnification of the specimen. A mechanical focusing ring is located in the middle of the body, which can be manually driven to move the internal lens group to adjust the focus. It can present a clear field of view through the principle of optical refraction without the need for power supply. The eyepiece end is an arc-shaped viewing window adapted for human eye observation, with an anti-slip grip structure on the outside for direct visual observation by the user. The connecting part is a snap-fit ​​or threaded structure that can be detachably adapted to the sliding block observation end, which can be quickly assembled and fixed without affecting the optical performance of the endoscope itself. This purely optical endoscope structure is mature and widely used, and belongs to the prior art known in the field. It is only used as a conventional adaptation component to realize the specimen observation function and does not involve the innovative improvement of this patent.

[0034] The aforementioned technologies can be specifically optimized to meet the requirements of aseptic operation, structural stability, specimen protection, ease of operation, and full-view observation for clinical pathology specimen observation, thereby fully satisfying the requirements for safe and effective use in clinical scenarios. First, regarding cleaning and disinfection requirements, all structures in this device, including sliding grooves, adjusting grooves, toothed grooves, mating gaps, and spring mounting cavities, adopt a large-gap, open, and blind-cavity design. All gaps are ≥2mm wide, with no closed cavities or cleaning dead angles. Thorough cleaning and disinfection can be achieved through high-pressure water jet rinsing, high-temperature and high-pressure steam sterilization, and disinfectant immersion, fully complying with pathology department aseptic operation and biosafety standards. All components in contact with specimens (including the rubber clamping shaft) are made of medical-grade silicone rubber, medical-grade 304 / 316L stainless steel, and medical-grade ABS, conforming to medical device standards such as YY / T 0294 and GB / T 16886. These materials possess excellent biocompatibility and biosafety. All metal components can withstand high-temperature and high-pressure sterilization at 134℃ and 0.2MPa, while rubber and plastic components can withstand conventional disinfectant immersion and ethylene oxide sterilization, fully meeting medical device material compliance requirements.

[0035] Secondly, regarding structural stability, the sliding block of this device adopts a large contact area fit structure between the vertical part and the sliding groove, and the horizontal part and the sliding rail adopt a double support and limiting design. When the endoscope assembly is installed in the horizontal part, its weight is evenly distributed through the double support structure, and no overturning moment will be generated. This ensures that the vertical part does not tilt, jam, or detach in the sliding groove, achieving stable and shaky observation of the endoscope assembly. In addition, the positioning mechanism adopts a dual positioning structure of tooth meshing + spring preload. The teeth are made of wear-resistant medical stainless steel, and the meshing surface is hardened, which can effectively avoid tooth wear and increased gap caused by frequent adjustments. At the same time, the spring preload can compensate for the meshing gap in real time, ensuring long-term stable positioning accuracy, which can meet the precise observation needs of millimeter-level cutting edges and focal small lesions.

[0036] Third, regarding specimen protection, the threaded screwing structure of the mounting shaft of this device is equipped with a mechanical limiting structure and a pressure buffer structure. When the rubber clamping shaft contacts the specimen and reaches the preset safety pressure, the limiting structure automatically locks, which can completely avoid excessive compression caused by manual screwing, effectively protect the fragile mucosal tissue, prevent specimen deformation and tearing, and completely preserve the tissue structure of early cancer margins and focal lesions, ensuring the accuracy of pathological diagnosis. At the same time, this device adopts a multi-point uniform clamping design, with each clamping shaft bearing force synchronously, which can ensure that the specimen is subjected to uniform force and has no tensile deformation, fully meeting the basic requirements for pathological specimen observation.

[0037] Fourth, regarding ease of operation, both the sliding block and the mounting base of this device adopt a single-handed operation structure for adjustment: the sliding block can be adjusted by moving the unlocking lever with one hand to achieve integrated unlocking, moving, and locking operations; the mounting base can be adjusted and locked by pressing the unlocking button with one hand. No two hands are required for operation. Doctors can operate the endoscope and record observation results while adjusting the specimen position. The operation is simple and convenient, and no professional training is required to quickly get started. It fully meets the actual clinical needs.

[0038] Fifth, regarding the observation function, the endoscope assembly of this device is equipped with a pitch adjustment mechanism and a rotation adjustment mechanism, which can realize the pitch angle adjustment of the endoscope lens from 0-30° and the rotation angle adjustment of 360°. With the length direction translation of the sliding block and the width direction translation of the mounting base, it can realize multi-angle observation of small lesions in the depressions and folds of the specimen without blind spots, without the need to manually turn the specimen, completely avoiding the risk of specimen damage, and can fully cover all areas of the specimen, achieving complete and accurate observation of pathological specimens.

[0039] The aforementioned accommodating slot can accommodate two specimen placement and fixation modes. The first mode is for specimens supported by glass slides: the glass slide with attached early gastrointestinal cancer lesions is placed smoothly into the accommodating slot, and the mounting shaft is turned to move the clamping shaft, so that the clamping shaft flexibly abuts against the outer peripheral wall of the glass slide, achieving stable fixation of the glass slide and preventing the glass slide from shifting during observation. The second mode is for fresh mucosal tissue blocks after ESD that do not require glass slide support: the tissue block is placed directly into the accommodating slot, and observation can be performed directly without turning the mounting shaft to drive the clamping shaft.

[0040] The aforementioned technology addresses the need for adjusting the observation position of the endoscope along the width of the slide rail by employing a method where the specimen moves with the mounting base. This eliminates the need for any manipulation of the sliding blocks on the slide rail or the endoscope components. By simply controlling the mounting structure on the base plate (i.e., adjusting the engagement position of the first positioning groove and the first limiting groove, and adjusting the engagement position of the second positioning groove and the second limiting groove), the mounting base can be flexibly moved and securely fixed along the width of the slide rail. This, in turn, causes the specimen within the mounting base's accommodating slot to move synchronously along the width of the slide rail, thereby indirectly adjusting the observation position of the endoscope relative to the specimen in the width of the slide rail without requiring additional adjustments to the endoscope's own position and angle.

[0041] In the above-mentioned technology, the adjustment of the endoscope assembly along the height direction can be achieved through a simple mechanical structure. Specifically, the observation end of the sliding block has a socket for the lens of the endoscope assembly to be inserted. The outer wall of the observation end is also threaded with a locking bolt. The screw end of the locking bolt can extend into the socket. During adjustment, it is only necessary to adjust the height of the lens of the endoscope assembly inserted into the socket according to the observation requirements, and then tighten the locking bolt so that the screw end of the locking bolt abuts against the outer wall of the lens to form a limit fixation. This allows for quick adjustment and stable positioning of the endoscope assembly along the height direction. The operation is simple and the adjustment accuracy is adapted to the specimen observation requirements.

[0042] The accompanying drawings in the above specification only illustrate the connection and positional relationships of the components and do not limit the specific dimensions and shapes. The dimensions and shapes of the components can be adjusted according to actual needs.

[0043] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary observation device for early gastrointestinal cancer lesion specimens, characterized in that: The device includes a base plate, on which a mounting seat for accommodating and fixing external specimens is detachably connected, and an installation structure for adjusting the relative position of the mounting seat on the base plate along the width direction and fixing the mounting seat to the base plate. Each end of the base plate is supported by a frame plate, and a slide rail is provided between the two frame plates. The length direction of the slide rail is consistent with the length direction of the base plate. A sliding block is movably arranged on the slide rail along the length direction of the slide rail, and an endoscope assembly is provided on the sliding block for an external observer to observe the specimen in the mounting seat. A fixing component is provided on the slide rail for fixing and limiting the sliding block after it has slid.

2. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 1, characterized in that: The slide rail has a groove along its length. The sliding block consists of a horizontal part and a vertical part, which are perpendicularly connected. The horizontal part is positioned below the slide rail, and the vertical part is inserted into the groove and slides along the length of the slide rail. The horizontal part extends partially to one side of the slide rail and forms an observation end. The endoscope assembly is detachably connected to the observation end. An adjustment groove is formed along the length of the slide rail sidewall, and the adjustment groove communicates with the groove. An adjustment shaft is provided on the vertical part. An adjustment groove is provided at the end of the shaft, forming a toggle end for external users to operate. An adjustment hole is provided on the vertical part. The beginning end of the adjustment shaft is movably disposed in the adjustment hole along the axis of the adjustment hole. The axis of the adjustment hole is perpendicular to the length direction of the adjustment groove. A return spring is sleeved on the adjustment shaft. The beginning end of the return spring is connected to the bottom wall of the adjustment hole, and the end end of the return spring is connected to the outer peripheral wall of the beginning end of the adjustment shaft. When the adjustment shaft is not subjected to external force, the return spring applies a force to the adjustment shaft in the direction of the bottom wall of the adjustment hole.

3. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 2, characterized in that: The top and bottom walls of the adjusting groove are provided with first protrusions along the length of the slide rail. The first protrusions are provided with first toothed grooves along the length of the adjusting groove. The fixing structure includes two opposing first abutment plates and two first protrusions disposed on the two first abutment plates for meshing with adjacent first toothed grooves. Both first abutment plates are disposed on the outer peripheral wall of the adjusting shaft. The adjusting shaft is movably disposed on the vertical part so that the first protrusions mesh with or separate from the first toothed grooves when the adjusting shaft moves.

4. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 3, characterized in that: A limiting protrusion is provided on the left side of the first tooth groove. The height of the limiting protrusion is greater than the height of the first tooth groove. The outer wall surface of the limiting protrusion is a limiting surface used to abut against the left side wall of the first abutment plate when the adjusting shaft is subjected to the force applied by the reset spring.

5. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 4, characterized in that: The first tooth groove has a mating protrusion on its right side, and the mating protrusion has a mating tooth groove along the length of the adjustment groove. The adjustment shaft has two mating plates, and each of the two mating plates has a mating protrusion. The two mating protrusions correspond to the two mating tooth grooves respectively. When the first protrusion meshes with the first tooth groove, the mating protrusion meshes with the corresponding mating tooth groove. When the first protrusion meshes with the second tooth groove, the left side wall of the mating plate abuts against the right side wall of the first protrusion.

6. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 3, characterized in that: The top and bottom walls of the adjusting groove are provided with second protrusions along the length of the slide rail. The second protrusions are provided with second toothed grooves along the length of the adjusting groove. The fixing structure includes two opposing second abutment plates and two second protrusions disposed on the two second abutment plates for meshing with adjacent second toothed grooves. The two second abutment plates are disposed on the outer peripheral wall of the adjusting shaft. When the adjusting shaft moves, the second protrusions mesh with or separate from the second toothed grooves. The first toothed groove is composed of a number of first teeth that are continuously and evenly arranged along the length of the slide rail. The second toothed groove is composed of a number of second teeth that are continuously and evenly arranged along the length of the slide rail. The number of first teeth corresponds one-to-one with the number of second teeth, and each first tooth is offset from the corresponding second tooth.

7. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 1, characterized in that: The mounting base has a receiving groove for accommodating external specimens. The outer peripheral wall of the mounting base has a number of mounting holes, and the mounting holes are all connected to the receiving groove. Each mounting hole is threaded with a mounting shaft. The beginning of the mounting shaft passes through the receiving groove and is provided with a clamping shaft for pressing against the outer wall of the external specimen. The clamping shaft is made of rubber.

8. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 1, characterized in that: The mounting base is flat and has a mounting plate extending from its outer wall. The bottom wall of the mounting plate is flush with the bottom wall of the mounting base. An extension extends from the outer wall of the base plate, and the top surface of the extension is a placement surface for contacting the bottom wall of the mounting plate. Both ends of the extension are vertically connected to positioning shafts. A pressure plate is movably arranged between the two positioning shafts. The pressure plate has through holes for the positioning shafts to pass through at the positions of the two positioning shafts. The bottom wall of the pressure plate is a pressing surface for pressing against the top wall of the mounting plate. An anti-detachment block is provided at the top of the positioning shaft, and the diameter of the anti-detachment block is larger than the diameter of the through hole. A compression spring is sleeved on the positioning shaft. The beginning of the compression spring is connected to the bottom wall of the anti-detachment block, and the end of the compression spring is abutted against the top wall of the pressure plate.

9. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 8, characterized in that: The mounting plate has a first limiting tooth groove on its top wall. The first limiting tooth groove is composed of several third teeth that are continuously and evenly arranged along the length of the slide rail. The pressure plate has a first positioning tooth groove on its bottom wall for meshing with the first limiting tooth groove. The first positioning tooth groove is composed of several fourth teeth that are continuously and evenly arranged along the length of the slide rail. The number of third teeth is less than the number of fourth teeth.

10. The auxiliary observation device for early gastrointestinal cancer lesion specimens according to claim 9, characterized in that: The placement surface is provided with a second limiting tooth groove, which is composed of a number of fifth teeth that are continuously and evenly arranged along the width direction of the slide rail. The bottom wall of the mounting plate is provided with a second positioning tooth groove for meshing with the second limiting tooth groove, which is composed of a number of sixth teeth that are continuously and evenly arranged along the width direction of the slide rail. The number of fifth teeth is greater than the number of sixth teeth.

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