A pathological biopsy knife and a blade mounting method thereof

Abstract

The application discloses a pathological sampling knife and a blade mounting method thereof, and relates to the technical field of medical devices.The pathological sampling knife comprises a handle box, a knife seat is slidably connected in the handle box, a worm is rotatably installed in the knife seat, the worm is engaged with a worm wheel, the worm wheel is fixedly installed on a threaded cylinder, the threaded cylinder is rotatably installed in the knife seat, a threaded rod is in threaded connection with the threaded cylinder, a connecting block is fixedly installed at one end of the threaded rod away from the threaded cylinder, the connecting block is slidably connected in a fixed block, and the fixed block is fixedly installed on a blade.The worm, the worm wheel and other structures are cooperated to realize convenient mounting and dismounting of the blade.The first handle is rotated, the worm drives the threaded rod to move, the connecting block is aligned with the fixed block, the first clamping block is clamped and fixed on the blade under the action of the first reset spring, and when the first connecting plate is pulled to make the clamping block disengaged, the blade can be dismounted.The operation is simple, the clamping is stable, the blade can be prevented from loosening and falling off, and the sampling safety is ensured.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a pathological sampling knife and its blade installation method. Background Technology

[0002] Pathological scalpels are indispensable tools in pathological research and laboratory work. Designed specifically for obtaining tissue specimens, they meet the precision requirements of pathological diagnosis and research. Their core design philosophy focuses on efficiency and safety, and through meticulous craftsmanship, they ensure the easy acquisition of tissue blocks of uniform size and reliable quality. These standardized tissue samples lay a solid foundation for subsequent pathological examinations, enabling accurate and reliable diagnostic results from both immunohistochemical staining and detailed microscopic observation.

[0003] Existing pathological sampling scalpels have certain shortcomings. Their blades are mostly threaded, making disassembly and installation inconvenient and causing inconvenience for medical staff. Furthermore, these scalpels are difficult to store when not in use, leaving the blades exposed for extended periods. This not only makes them susceptible to damage from impacts and friction, affecting subsequent accuracy, but also poses a significant safety hazard. Careless handling could result in cuts to medical staff, negatively impacting both work safety and efficiency. Therefore, improvements and optimizations are urgently needed. Summary of the Invention

[0004] In view of the problems in related technologies, the present invention proposes a pathological sampling knife and its blade installation method to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a pathological sampling scalpel. The device features a compact design and convenient operation, primarily comprising a handle box with a slidably connected blade holder inside, providing stable support and sliding space for the blade holder. A worm gear is rotatably mounted inside the blade holder, engaging a worm wheel. The rotation of the worm gear drives the worm wheel to rotate synchronously, achieving power transmission. The worm wheel is fixedly mounted on a threaded cylinder, which is rotatably mounted inside the blade holder, allowing the rotation of the worm wheel to drive the threaded cylinder to rotate stably within the blade holder. A threaded rod is threadedly connected inside the threaded cylinder. When the threaded cylinder rotates, the threaded rod moves linearly along the axial direction of the threaded cylinder. A connecting block is fixedly mounted at the end of the threaded rod away from the threaded cylinder, slidably connected inside a fixed block. The fixed block is fixedly mounted on the blade. The linear movement of the threaded rod causes the connecting block to slide within the fixed block, thereby enabling the installation or removal of the blade. The connecting block and the fixing block are respectively provided with a first hole and a second hole. A first locking block is slidably connected to the first hole and the second hole. A first connecting plate is fixedly installed on both sides of the first locking block. The first connecting plate is fixedly connected to the fixing block by a first return spring. The first locking block can slide in the first hole and the second hole under the action of the first return spring, so as to realize the locking or separation between the connecting block and the fixing block.

[0006] Furthermore, a first handle is fixedly installed at one end of the worm gear, which can be easily rotated by turning the first handle. The blade is slidably connected inside the blade holder, facilitating the installation and removal of the blade. The first locking block passes through the first hole and the second hole to form a locking connection with the connecting block, ensuring a stable connection between the blade and the connecting block and preventing the blade from falling off during use.

[0007] Furthermore, one end of the first return spring is fixedly mounted on the first connecting plate, and the other end is fixedly mounted on the fixing block, providing a stable return force for the first locking block. The worm gear, threaded cylinder, threaded rod, connecting block, fixing block, first hole, second hole, first locking block, first connecting plate, and first return spring are all provided in two sets, and the connection methods are all identical. This symmetrical design ensures that the blade is subjected to uniform force during installation and disassembly, making operation more stable and reliable.

[0008] Furthermore, the tool holder box has a first sliding groove, and a second handle is slidably connected to the first sliding groove. The second handle is fixedly installed on the tool holder. By pushing or pulling the second handle, the tool holder can slide within the tool holder box, realizing the extension and retraction function of the tool holder. The tool holder is fixedly installed with a sliding block, which is slidably connected inside the second sliding groove. The second sliding groove is located inside the tool holder box. The cooperation between the sliding block and the second sliding groove provides guidance for the sliding of the tool holder, ensuring that the tool holder slides smoothly and does not deviate.

[0009] Furthermore, a third sliding groove is provided above the tool holder, and a retaining groove is provided inside the third sliding groove. The retaining groove engages with the second retaining block. When the tool holder slides to a suitable position, the second retaining block can be engaged into the retaining groove to fix the position of the tool holder.

[0010] Furthermore, the second locking block is slidably connected to the tool holder box, and second connecting plates are fixedly installed on both sides of the second locking block. The second connecting plates provide support for the sliding of the second locking block and facilitate the connection of other components.

[0011] Furthermore, the spray delivery pipe is fixedly connected to several atomizing nozzles to evenly spray condensate onto the condenser, improving the condensation effect. A cooling fan is rotatably installed inside the support frame to assist in cooling the condenser, accelerating its heat dissipation and ensuring normal equipment operation. One end of a second return spring is fixedly mounted on the second connecting plate, and the other end is fixedly mounted on the tool holder box. The second return spring provides a reset force to the second locking block, allowing it to automatically engage or disengage from the slot.

[0012] Furthermore, the knife handle box is fixedly equipped with a magnetic tail, which can attract fallen blades to prevent them from being lost and improve safety during use. The surface of the knife handle box is provided with anti-slip threads to increase the friction between the hand and the knife handle box, making it easier for the operator to grip and preventing the knife handle box from slipping during use.

[0013] Compared with the prior art, the present invention has the following advantages: 1. This pathological sampling scalpel achieves convenient blade installation and removal through the ingenious combination of a worm gear, worm wheel, threaded cylinder, and threaded rod. When installing the blade, rotating the first handle rotates the worm gear, causing the threaded rod to move linearly, aligning the connecting block with the fixing block. The first locking block, under the action of the first return spring, securely engages the blade, firmly fixing it to the scalpel holder. For removal, simply pull the first connecting plate to disengage the first locking block, easily removing the blade. This design is not only simple to operate but also provides a stable locking structure, effectively preventing the blade from loosening or falling off during use, ensuring smooth and safe sampling operations.

[0014] 2. The blade holder of this material-picking knife can slide flexibly within the handle box via the second handle. The cooperation between the sliding block and the second sliding groove provides precise guidance for the blade holder's sliding, ensuring smooth and non-deviation-prone movement. During use, push the blade holder to the appropriate position; the second locking block, under the action of the second return spring, engages with the slot, fixing the blade holder in place and ensuring accurate material picking. When not in use, pull the second locking block to release the fixation and store the blade holder in the handle box. Furthermore, the magnetic tail of the handle box can attract fallen blades, preventing loss and accidental cuts. The anti-slip threads on the surface increase grip friction, preventing slippage and comprehensively ensuring both convenience and safety in use.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is an enlarged schematic diagram of point A in the present invention; Figure 4 This is a schematic diagram of some parts of the present invention; Figure 5 This is an enlarged schematic diagram of point B in the present invention; Figure 6 This is an exploded view of some parts of the present invention; Figure 7 This is a schematic diagram of the tool holder of the present invention; Figure 8 This is a cross-sectional view of the tool holder of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Tool holder box; 2. Tool holder; 3. Worm gear; 4. Worm wheel; 5. Threaded cylinder; 6. Threaded rod; 7. Connecting block; 8. Fixing block; 9. Blade; 10. First hole; 11. Second hole; 12. First locking block; 13. First connecting plate; 14. First return spring; 15. First slide groove; 16. Second handle; 17. Sliding block; 18. Second slide groove; 19. Third slide groove; 20. Slot; 21. Second locking block; 22. Second connecting plate; 23. Second return spring; 24. Magnetic tailpiece; 25. First handle. Detailed Implementation

[0019] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0020] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

[0021] Please see Figures 1-8 As shown, this invention is a pathological sampling knife with an ingenious structure, convenient operation, and strong practicality. It mainly includes a handle box 1, with a knife holder 2 slidably connected inside the handle box 1, providing a stable space for the knife holder 2 to accommodate and slide. A worm gear 3 is rotatably mounted inside the knife holder 2, and the worm gear 3 meshes with a worm wheel 4. The rotation of the worm gear 3 drives the worm wheel 4 to rotate synchronously, achieving power transmission. The worm wheel 4 is fixedly mounted on a threaded cylinder 5, which is rotatably mounted inside the knife holder 2, allowing the rotation of the worm wheel 4 to drive the threaded cylinder 5 to rotate stably within the knife holder 2. A threaded rod 6 is threadedly connected inside the threaded cylinder 5. When the threaded cylinder 5 rotates, the threaded rod 6 moves linearly along the axial direction of the threaded cylinder 5. A connecting block 7 is fixedly mounted at the end of the threaded rod 6 away from the threaded cylinder 5. The connecting block 7 is slidably connected inside a fixed block 8, which is fixedly mounted on the blade 9. The linear movement of the threaded rod 6 drives the connecting block 7 to slide within the fixed block 8, thereby enabling the installation or removal of the blade 9. The connecting block 7 and the fixing block 8 are respectively provided with a first hole 10 and a second hole 11. A first locking block 12 is slidably connected to the first hole 10 and the second hole 11. A first connecting plate 13 is fixedly installed on both sides of the first locking block 12. The first connecting plate 13 is fixedly connected to the fixing block 8 by a first return spring 14. The first locking block 12 can slide in the first hole 10 and the second hole 11 under the action of the first return spring 14, so as to realize the locking or separation between the connecting block 7 and the fixing block 8.

[0022] The working principle of the pathological sampling knife proposed in this invention is as follows: when using the pathological sampling knife, the worm gear 3 installed inside the knife holder 2 is rotated, which drives the worm wheel 4 meshing with it to rotate synchronously. Since the worm wheel 4 is fixed on the threaded cylinder 5, and the threaded cylinder 5 is rotatably installed inside the knife holder 2, the rotation of the worm wheel 4 will drive the threaded cylinder 5 to rotate stably inside the knife holder 2.

[0023] The threaded cylinder 5 is internally threaded to a threaded rod 6. When the threaded cylinder 5 rotates, the threaded rod 6 moves linearly along the axial direction of the threaded cylinder 5. A connecting block 7 is fixed to the end of the threaded rod 6 away from the threaded cylinder 5. The connecting block 7 is slidably connected inside a fixed block 8. The fixed block 8 is fixedly mounted on the blade 9. The linear movement of the threaded rod 6 causes the connecting block 7 to slide within the fixed block 8, which in turn causes the blade 9 to move within the blade holder 2, thereby controlling the extension length of the blade 9.

[0024] When the blade 9 needs to be installed on the tool holder 2, align the connecting block 7 with the fixing block 8, so that the first hole 10 on the connecting block 7 corresponds to the second hole 11 on the fixing block 8. Overcome the elastic force of the first return spring 14, pull the first connecting plate 13 installed on both sides of the first locking block 12, so that the first locking block 12 slides and inserts into the first hole 10 and the second hole 11. Release the first connecting plate 13, and under the reset action of the first return spring 14, the first locking block 12 and the connecting block 7 form a locking engagement, thereby fixing the blade 9 on the tool holder 2.

[0025] When it is necessary to remove the blade 9, overcome the elastic force of the first return spring 14 again, pull the first connecting plate 13, so that the first locking block 12 slides in the first hole 10 and the second hole 11 and disengages from the locking block 7, and the blade 9 can be removed from the blade holder 2.

[0026] In one embodiment, for the worm gear 3, a first handle 25 is fixedly installed at one end of the worm gear 3. The operator can easily rotate the worm gear 3 by turning the first handle 25, thereby controlling the subsequent installation and removal of the blade 9. The blade 9 is slidably connected inside the blade holder 2, facilitating the installation and positioning of the blade 9 within the blade holder 2 and subsequent disassembly and replacement. The first locking block 12 passes through the first hole 10 and the second hole 11 to form a locking connection with the connecting block 7. This locking method ensures a stable connection between the blade 9 and the connecting block 7, preventing the blade 9 from falling off during use and ensuring the smooth progress of material handling operations.

[0027] In one embodiment, for the first return spring 14, one end of the first return spring 14 is fixedly mounted on the first connecting plate 13, and the other end is fixedly mounted on the fixing block 8, providing a stable return force for the first locking block 12, so that the first locking block 12 can automatically return to its initial position after completing the locking or disengaging operation. The worm gear 4, threaded cylinder 5, threaded rod 6, connecting block 7, fixing block 8, first hole 10, second hole 11, first locking block 12, first connecting plate 13, and first return spring 14 are all provided in two sets, and the connection methods are all the same. This symmetrical design ensures that the blade 9 is subjected to uniform force during installation and disassembly, making the operation more stable and reliable, and improving the overall performance of the device.

[0028] In one embodiment, the aforementioned knife holder box 1 has a first sliding groove 15, and a second handle 16 is slidably connected to the first sliding groove 15. The second handle 16 is fixedly installed on the knife holder 2. By pushing or pulling the second handle 16, the operator can move the knife holder 2 within the knife holder box 1, realizing the telescopic function of the knife holder 2, which facilitates adjusting the position of the knife holder 2 in different material handling scenarios. A sliding block 17 is fixedly installed on the knife holder 2, and the sliding block 17 is slidably connected inside a second sliding groove 18. The second sliding groove 18 is located inside the knife holder box 1. The cooperation between the sliding block 17 and the second sliding groove 18 provides guidance for the sliding of the knife holder 2, ensuring that the knife holder 2 slides smoothly and does not deviate, thus improving the stability of the sliding of the knife holder 2.

[0029] In one embodiment, for the aforementioned tool holder 2, a third sliding groove 19 is provided on the top of the tool holder 2, and a locking groove 20 is provided inside the third sliding groove 19. The locking groove 20 engages with the second locking block 21. When the tool holder 2 slides to a suitable position, the second locking block 21 can be locked into the locking groove 20 to fix the position of the tool holder 2, prevent the tool holder 2 from sliding randomly during use, and ensure the accuracy of the material handling operation.

[0030] In one embodiment, the second locking block 21 is slidably connected to the tool holder box 1. Second connecting plates 22 are fixedly installed on both sides of the second locking block 21. The second connecting plates 22 provide support for the sliding of the second locking block 21 and facilitate the connection of other components, so that the second locking block 21 can slide stably on the tool holder box 1.

[0031] In one embodiment, for the second connecting plate 22, one end of the second return spring 23 is fixedly installed on the second connecting plate 22, and the other end of the second return spring 23 is fixedly installed on the tool holder box 1. The second return spring 23 provides a return spring force for the second locking block 21. When it is necessary to adjust the position of the tool holder 2, the operator can overcome the spring force of the second return spring 23 to make the second locking block 21 exit the slot 20. After the adjustment is completed, the second locking block 21 can automatically lock into the slot 20 under the action of the second return spring 23 to realize the fixation of the position of the tool holder 2.

[0032] In one embodiment, the knife handle box 1 is fixedly equipped with a magnetic tail 24, which can attract fallen blades 9, preventing them from being lost and improving safety. It also prevents the blades 9 from causing environmental pollution or injury to personnel. The surface of the knife handle box 1 is provided with anti-slip threads to increase friction between the hand and the box, making it easier for the operator to grip and preventing it from slipping during use, ensuring stable material handling operations.

[0033] The working principle of the pathological sampling knife proposed in this invention is as follows: When installing the blade, firstly, the first handle 25 fixed to one end of the worm 3 is rotated, causing the worm 3 to rotate. Since the worm 3 and the worm wheel 4 mesh with each other, the worm wheel 4 will rotate synchronously. The worm wheel 4 is fixedly installed on the threaded cylinder 5, and the threaded cylinder 5 is rotatably installed inside the knife holder 2. Therefore, the rotation of the worm wheel 4 will drive the threaded cylinder 5 to rotate stably within the knife holder 2. The threaded cylinder 5 is threadedly connected to a threaded rod 6. When the threaded cylinder 5 rotates, the threaded rod 6 will move linearly along the axial direction of the threaded cylinder 5. A connecting block 7 is fixed to the end of the threaded rod 6 away from the threaded cylinder 5. The connecting block 7 is slidably connected inside a fixed block 8, and the fixed block 8 is fixedly installed on the blade 9. Therefore, the linear movement of the threaded rod 6 can drive the connecting block 7 to slide within the fixed block 8.

[0034] In this device, the worm gear 4, threaded cylinder 5, threaded rod 6, connecting block 7, fixing block 8, first hole 10, second hole 11, first locking block 12, first connecting plate 13, and first return spring 14 are all provided in two sets, and the connection method is the same. When the connecting block 7 is aligned with the fixing block 8, and the first hole 10 and the second hole 11 correspond, the elastic force of the first return spring 14 is overcome, and the first connecting plate 13 fixed on both sides of the first locking block 12 is pulled (one end of the first return spring 14 is fixed on the first connecting plate 13, and the other end is fixed on the fixing block 8), so that the first locking block 12 slides and inserts into the first hole 10 and the second hole 11. Then the first connecting plate 13 is released, and under the reset action of the first return spring 14, the first locking block 12 passes through the first hole 10 and the second hole 11 and forms a stable locking with the connecting block 7, thereby firmly fixing the blade 9 to the blade holder 2.

[0035] To remove the blade 9, overcome the elastic force of the first return spring 14 again, pull the first connecting plate 13, so that the first locking block 12 slides in the first hole 10 and the second hole 11 and disengages from the locking block 7, and the blade 9 can be easily removed.

[0036] When the pathological sampling scalpel is needed, push the scalpel holder 2 to slide it completely out of the scalpel handle box 1. The scalpel handle box 1 has a first sliding groove 15, and a second handle 16, slidably connected within the first sliding groove 15, is fixedly installed on the scalpel holder 2. The operator pushes the second handle 16 to slide the scalpel holder 2. A sliding block 17 fixed to the scalpel holder 2 is slidably connected within a second sliding groove 18 inside the scalpel handle box 1, providing guidance for the sliding of the scalpel holder 2 and ensuring smooth sliding without deviation. When the scalpel holder 2 slides to the appropriate position, a second locking block 21 slidably connected to the scalpel handle box 1 will engage with a locking slot 20 in a third sliding groove 19 above the scalpel holder 2, fixing the position of the scalpel holder 2 and ensuring that the scalpel holder 2 will not slide arbitrarily during use, thus ensuring the accuracy of the sampling operation.

[0037] When the tool is not in use, the operator pulls the second locking block 21 to overcome the elastic force of the second return spring 23 (the second locking block 21 has a second connecting plate 22 fixed on both sides, the second connecting plate 22 is fixedly connected to one end of the second return spring 23, and the other end of the second return spring 23 is fixed to the tool holder box 1), causing the second locking block 21 to exit the slot 20 and releasing the fixation on the tool holder 2. Then, by pulling the second handle 16, the tool holder 2 and the blade 9 are completely stored inside the tool holder box 1. The magnetic tail 24 fixed to the tool holder box 1 can attract any fallen blades 9, preventing the blades 9 from being lost and avoiding damage from prolonged exposure or accidental cuts. In addition, the anti-slip threads on the surface of the tool holder box 1 increase the friction between the hand and the tool holder box 1, making it easier for the operator to grip and preventing the tool holder box 1 from slipping during use, ensuring stable tool gathering operations.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of the invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pathological sampling scalpel and its blade mounting method, comprising a scalpel handle box (1), characterized in that: The tool holder box (1) is slidably connected to a tool holder (2). A worm gear (3) is rotatably installed inside the tool holder (2). The worm gear (3) meshes with a worm wheel (4). The worm wheel (4) is fixedly installed on a threaded cylinder (5). The threaded cylinder (5) is rotatably installed inside the tool holder (2). A threaded rod (6) is threadedly connected inside the threaded cylinder (5). A connecting block (7) is fixedly installed at one end of the threaded rod (6) away from the threaded cylinder (5). The connecting block (7) is slidably connected inside a fixed block (8). The fixed block (8) is fixedly installed on the blade (9). The connecting block (7) and the fixed block (8) are respectively provided with a first hole (10) and a second hole (11). A first locking block (12) is slidably connected to the first hole (10) and the second hole (11). A first connecting plate (13) is fixedly installed on both sides of the first locking block (12). The first connecting plate (13) is fixedly connected to the fixed block (8) by a first return spring (14).

2. The pathological sampling scalpel and its blade mounting method according to claim 1, characterized in that, One end of the worm (3) is fixedly installed with a first handle (25), the blade (9) is slidably connected to the inside of the blade holder (2), and the first locking block (12) passes through the first hole (10) and the second hole (11) to form a locking connection with the connecting block (7).

3. The pathological sampling scalpel and its blade installation method according to claim 2, characterized in that, One end of the first reset spring (14) is fixedly installed on the first connecting plate (13), and the other end is fixedly installed on the fixing block (8). The worm gear (4), threaded cylinder (5), threaded rod (6), connecting block (7), fixing block (8), first hole (10), second hole (11), first locking block (12), first connecting plate (13) and first reset spring (14) are all provided in two sets, and the connection methods are the same.

4. The pathological sampling scalpel and its blade mounting method according to claim 3, characterized in that, The handle box (1) has a first groove (15), and a second handle (16) is slidably connected to the first groove (15). The second handle (16) is fixedly installed on the knife holder (2). The knife holder (2) is fixedly installed with a sliding block (17), and the sliding block (17) is slidably connected to the inside of the second groove (18). The second groove (18) is opened inside the handle box (1).

5. The pathological sampling scalpel and its blade installation method according to claim 4, characterized in that, A third sliding groove (19) is provided above the tool holder (2), and a slot (20) is provided inside the third sliding groove (19), which engages with the second locking block (21).

6. The pathological sampling scalpel and its blade installation method according to claim 5, characterized in that, The second locking block (21) is slidably connected to the tool holder box (1), and the second connecting plate (22) is fixedly installed on both sides of the second locking block (21).

7. The pathological sampling scalpel and its blade installation method according to claim 6, characterized in that, The second connecting plate (22) is fixedly mounted with one end of the second return spring (23), and the other end of the second return spring (23) is fixedly mounted on the tool holder box (1).

8. The pathological sampling scalpel and its blade mounting method according to claim 7, characterized in that, The handle box (1) is fixedly equipped with a magnetic tail (24), which can attract fallen blades (9). The surface of the handle box (1) is provided with anti-slip threads.

9. The pathological sampling scalpel and its blade mounting method according to claim 1, characterized in that, Includes the following steps: Step 1: When using the pathological sampling knife, rotate the worm (3) installed inside the knife holder (2) to drive the worm wheel (4) meshing with it and fixed on the threaded cylinder (5) to rotate synchronously, so that the threaded cylinder (5) rotates stably inside the knife holder (2); Step 2: The threaded cylinder (5) is connected to the threaded rod (6) inside. When the threaded cylinder (5) rotates, the threaded rod (6) moves linearly along its axis, which drives the connecting block (7) fixed at one end of the threaded rod (6) to slide in the fixed block (8) fixed to the blade (9), thereby controlling the blade (9) to move in the blade holder (2) to adjust the extension length. Step 3: When installing the blade (9), align the connecting block (7) with the fixing block (8), and make the first hole (10) on the connecting block (7) correspond to the second hole (11) on the fixing block (8). Overcome the elastic force of the first reset spring (14) and pull the first connecting plate (13) to insert the first locking block (12) into the first hole (10) and the second hole (11). Release the first connecting plate (13), and the first locking block (12) will engage with the connecting block (7) to fix the blade (9). Step 4: When disassembling the blade (9), overcome the elastic force of the first reset spring (14) to pull the first connecting plate (13), so that the first locking block (12) slides in the first hole (10) and the second hole (11) and disengages from the locking block (7), and remove the blade (9).

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