Slicing device of pathological slicing machine

Abstract

The invention belongs to the field of slicing devices, particularly relates to a slicing device of a pathological slicing machine, and aims to solve the problems that an existing slicing device of the pathological slicing machine lacks a cleaning mechanism for a blade, so that the blade needs to be frequently disassembled and replaced and is very troublesome to use, and people are very easy to be scratched by the blade when the blade is replaced. Two vertical plates are fixedly mounted at the top of the base, a same lifting plate is slidably mounted between the two vertical plates, a cleaning mechanism is arranged on the lifting plate and comprises a protective frame fixedly mounted at the bottom of the lifting plate, and the bottom of the protective frame is in contact with one mounting plate. The subsequent slicing work cannot be delayed due to cleaning, the used cutter can be effectively cleaned, the cutter does not need to be frequently replaced, time and labor are saved, people are prevented from being scratched due to frequent replacement and switching, and waste liquid generated during cleaning is collected.

Description

Technical Field

[0001] This invention relates to the field of slicing apparatus technology, and more particularly to a slicing apparatus for a pathological slicer. Background Technology

[0002] Pathological sections: A certain size of lesion tissue is taken and prepared into pathological sections using histopathological methods. Usually, the lesion tissue is embedded in a paraffin block, cut into thin sections using a microtome, stained with hematoxylin-eosin (HE), and then further examined under a microscope.

[0003] Patent document CN206862673U discloses a slicing device for a pathological microtome, including a blade holder and a pressure plate. The blade holder has a blade support, and a blade is installed between the blade holder and the pressure plate. The blade is a double-edged blade, and a detachable magnetic strip is installed in the middle of the blade. Clamping bars are provided on both sides of the magnetic strip. Both the blade holder and the pressure plate have stepped surfaces, and the connection between the magnetic strip and the clamping bars is adapted to the stepped surfaces. The blade support has a blade receiving groove that mates with the blade edge. A blade cover is provided at the top of the blade holder and is hinged to the blade holder. A cover slot is provided on the pressure plate. This slicing device has a simple structure and a scientific and reasonable design. The magnetic strip makes it quick and convenient to remove and install the blade. The blade can be used on both sides, saving costs. The internal structural design of the blade holder and the pressure plate prevents the blade from easily slipping during slicing, avoiding blade jumping and sticking, and improving the quality of the slices.

[0004] However, existing pathological microtome slicing devices lack a blade cleaning mechanism, which requires frequent blade disassembly and replacement, making it very inconvenient to use. Moreover, people are easily cut by the blade when changing it. Therefore, we propose a pathological microtome slicing device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing pathological microtome slicing devices, which lack a blade cleaning mechanism, requiring frequent blade disassembly and replacement, making them very inconvenient to use, and causing easy cuts to the user when changing blades. Therefore, this invention proposes a pathological microtome slicing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pathological microtome slicing device includes a base. Two vertical plates are fixedly mounted on the top of the base. A common lifting plate is slidably mounted between the two vertical plates. A cleaning mechanism is provided on the lifting plate. The cleaning mechanism includes a protective frame fixedly mounted on the bottom of the lifting plate. The bottom of the protective frame contacts a mounting plate. One of two cutting blades is located inside the protective frame. Two symmetrically arranged rectangular cavities are formed on the protective frame. Multiple water spray holes are formed on the inner walls of the front and rear sides of the protective frame, communicating with the two rectangular cavities. A hot air blower is fixedly mounted on the outer side of the protective frame, with its outlet communicating with the interior of the protective frame. An air guide plate is fixedly mounted on one inner wall of the protective frame, and an air outlet is formed on one side of the protective frame. A cleaning mechanism is fixedly mounted on the top of the two vertical plates. The same top plate has a lifting mechanism that cooperates with a lifting plate. Two vertical plates are rotatably mounted with the same rotating shaft. Two symmetrically arranged fixed seats are fixedly mounted on the outer side of the rotating shaft. Mounting plates are located on the opposite sides of the two fixed seats, and cutters are fixedly mounted on the opposite sides of the two mounting plates. A sewage collection mechanism is located on the top of the base, cooperating with the mounting plates. The sewage collection mechanism includes a push plate slidably mounted on the top of the base. A placement seat is fixedly mounted on one side of the push plate. A collection box is fixedly mounted on the top of the placement seat by screws. A box cover is fixedly mounted on the top of the collection box by bolts. A water inlet pipe is fixedly connected to the box cover. L-shaped drain holes are opened on both mounting plates. The outer side of the water inlet pipe... The inner wall of the corresponding L-shaped drain hole is in contact with the outer side of the collection box, and a discharge pipe is fixedly connected to it. A valve is installed on the discharge pipe. A flipping mechanism is installed on one side of one of the two vertical plates, cooperating with a rotating shaft. Positioning grooves are opened on the opposite sides of the two fixed seats, and electric push rods are fixedly installed in both positioning grooves. The output shafts of the two electric push rods are fixedly connected to the two mounting plates respectively. A water tank is fixedly installed on one side of the protective frame, and a water inlet is provided on one side of the water tank. A water pump is fixedly installed at the bottom of the water tank. The inlet of the water pump is fixedly connected to the inside of the water tank, and the outlet of the water pump is fixedly connected to one interface of a tee. The other two interfaces of the tee are fixedly connected to conveying pipes, which are fixedly connected to two rectangular cavities respectively. The lifting mechanism... A rectangular groove is formed at the bottom of the plate, and a movable seat is slidably installed in the rectangular groove. A mounting groove is formed at the bottom of the movable seat, and a support plate is fixedly installed in the mounting groove. Two vertical rods are rotatably mounted on the support plate, and brush bristles are fixedly installed on the outer sides of each vertical rod. The vertical rods are located within a protective frame, and gears are fixedly installed at the top of each vertical rod, with the two gears meshing. A first motor is fixedly installed on the top inner wall of the mounting groove, and the output shaft of the first motor is fixedly connected to the top of one of the gears. A second motor is fixedly installed on one inner wall of the rectangular groove, and a first screw is fixedly installed on the output shaft of the second motor. The first screw is threadedly connected to the movable seat. A vertical plate is fixedly installed on the top of the base, and a second screw is rotatably installed on one side of the vertical plate, with the second screw threadedly connected to a push plate.The lifting mechanism includes two third motors fixedly installed on the top of the top plate. A third screw is fixedly installed on the output shaft of each of the two third motors, and both third screws are threadedly connected to the lifting plate. A first bevel gear is fixedly sleeved on the outer side of one of the third screws, and a second bevel gear meshes with the first bevel gear. The second bevel gear is fixedly installed at one end of the second screw. Two horizontal holes are opened on the vertical plate, and the water pipe and the outer side of the second screw respectively contact the inner walls of the two horizontal holes. The tilting mechanism includes a fourth motor fixedly installed on one side of the vertical plate. A worm gear is fixedly installed on the output shaft of the fourth motor. A transmission rod is fixedly installed at one end of the rotating shaft, and a worm wheel is fixedly installed at one end of the transmission rod. The worm gear meshes with the worm wheel. A bearing is fixedly installed on the outer side of the vertical plate, and the inner ring of the bearing is fixedly connected to the bottom end of the worm gear.

[0008] The beneficial effects of the pathological sectioning device of the present invention are as follows:

[0009] The fourth motor drives the worm gear to rotate, the worm gear drives the worm wheel to rotate, the worm wheel drives the transmission rod to rotate, the transmission rod drives the rotating shaft to rotate, and the rotating shaft drives the two fixed seats to rotate, so that the two cutters can switch positions without delaying the subsequent slicing work.

[0010] Two third motors drive two third screws to rotate, causing the lifting plate to move downwards, so that the bottom of the lifting plate contacts the top of the mounting plate above. At the same time, the water pipe is inserted into the L-shaped drain hole, and the water pump draws disinfectant from the water tank. The disinfectant is diverted through a three-way valve to two delivery pipes, which then deliver it to two rectangular cavities. Finally, the disinfectant is sprayed out from multiple spray holes to clean the front and back sides of the cutter.

[0011] The first motor drives a gear to rotate, and the two gears mesh, which in turn drive the two vertical rods to rotate. The two vertical rods drive the brush bristles on them to rotate. The second motor drives the first screw to rotate, which moves the moving seat to the right, which in turn moves the two vertical rods to the right, and the brush bristles brush the front and back sides of the cutter.

[0012] The waste liquid generated during cleaning enters the collection box through the L-shaped drain hole and the water pipe. After cleaning, the hot air blower is turned on to blow hot air into the protective frame to dry the cutter. The moisture is discharged from the air outlet.

[0013] This invention allows for the switching between two cutting blades, preventing subsequent slicing work from being delayed due to cleaning. It can effectively clean the used cutting blades without the need for frequent blade replacement, saving time and effort, and avoiding the risk of injury from frequent switching. Furthermore, it collects the waste liquid generated during cleaning. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the slicing device of a pathological microtome proposed in this invention;

[0015] Figure 2 This is a schematic cross-sectional view of a pathological slicer slicing device proposed in this invention;

[0016] Figure 3 This is a side view of the lifting plate and cleaning mechanism of a pathological slicer slicing device proposed in this invention.

[0017] Figure 4 This invention provides a pathological sectioning device. Figure 2 A magnified structural diagram of part A in the middle;

[0018] Figure 5 This invention provides a pathological sectioning device. Figure 2 A magnified structural diagram of part B in the middle section;

[0019] Figure 6 This invention provides a pathological sectioning device. Figure 2 A magnified structural diagram of section C;

[0020] Figure 7 This is a three-dimensional structural diagram of the protective frame of a pathological slicer slicing device proposed in this invention.

[0021] In the diagram: 1. Base; 2. Vertical plate; 3. Top plate; 4. Rotating shaft; 5. Fixed seat; 6. Mounting plate; 7. Cutter; 8. Electric push rod; 9. L-shaped drain hole; 10. Transmission rod; 11. Worm gear; 12. Fourth motor; 13. Worm; 14. Lifting plate; 15. Protective frame; 16. Rectangular slot; 17. Moving seat; 18. Mounting slot; 19. Bearing plate; 20. Vertical rod; 21. Brush bristles; 22. Gear; 23. First motor; 24. 25. Second motor; 26. First screw; 27. Rectangular cavity; 28. Water spray hole; 29. ​​Water tank; 30. Water pump; 31. T-junction; 32. Delivery pipe; 33. Hot air blower; 34. Air outlet; 35. Air guide plate; 36. Push plate; 37. Placement seat; 38. Collection box; 39. Box cover; 40. Water inlet pipe; 41. Vertical plate; 42. Second screw; 43. Second bevel gear; 44. Third motor; 45. Third screw; 46. First bevel gear. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1

[0024] Reference Figures 1-7 A pathological microtome slicing device includes a base 1, two vertical plates 2 fixedly mounted on the top of the base 1, a common lifting plate 14 slidably mounted between the two vertical plates 2, a cleaning mechanism on the lifting plate 14, a common top plate 3 fixedly mounted on the top of the two vertical plates 2, a lifting mechanism on the top plate 3, the lifting mechanism cooperating with the lifting plate 14, a common rotating shaft 4 rotatably mounted on the two vertical plates 2, two symmetrically arranged fixed seats 5 fixedly mounted on the outer side of the rotating shaft 4, mounting plates 6 on the opposite sides of the two fixed seats 5, and cutters 7 fixedly mounted on the opposite sides of the two mounting plates 6, a wastewater collection mechanism on the top of the base 1, the wastewater collection mechanism cooperating with the mounting plate 6, a flipping mechanism on one side of one of the two vertical plates 2, the flipping mechanism cooperating with the rotating shaft 4, positioning grooves on the opposite sides of the two fixed seats 5, electric push rods 8 fixedly mounted in the two positioning grooves, and the output shafts of the two electric push rods 8 fixedly connected to the two mounting plates 6 respectively.

[0025] In this embodiment, the cleaning mechanism includes a protective frame 15 fixedly installed at the bottom of the lifting plate 14. The bottom of the protective frame 15 contacts a mounting plate 6. One of the two cutters 7 is located inside the protective frame 15. Two symmetrically arranged rectangular cavities 26 are opened on the protective frame 15. Multiple water spray holes 27 are opened on the inner walls of the front and rear sides of the protective frame 15, and the multiple water spray holes 27 communicate with the two rectangular cavities 26. A hot air blower 32 is fixedly installed on the outer side of the protective frame 15. The air outlet of the hot air blower 32 communicates with the interior of the protective frame 15. A guide plate 34 is fixedly installed on one inner wall of the protective frame 15. An air outlet 33 is opened on one side of the protective frame 15. A water tank 28 is fixedly installed on one side of the protective frame 15. A water inlet is provided on one side of the water tank 28. A water pump 29 is fixedly installed at the bottom of the water tank 28. The water inlet of the water pump 29 is fixedly communicated with the interior of the water tank 28. The water outlet of the water pump 29 is fixedly communicated with an interface of a tee 30. The other two ports of the three-way connector 30 are fixedly connected to the conveying pipes 31. The two conveying pipes 31 are fixedly connected to the two rectangular cavities 26 respectively. The bottom of the lifting plate 14 is provided with a rectangular groove 16. A movable seat 17 is slidably installed in the rectangular groove 16. The bottom of the movable seat 17 is provided with an installation groove 18. A bearing plate 19 is fixedly installed in the installation groove 18. Two vertical rods 20 are rotatably installed on the bearing plate 19. Brush bristles 21 are fixedly installed on the outer side of the two vertical rods 20. The vertical rods 20 are located inside the protective frame 15. Gears 22 are fixedly installed at the top of the two vertical rods 20. The two gears 22 mesh with each other. A first motor 23 is fixedly installed on the top inner wall of the installation groove 18. The output shaft of the first motor 23 is fixedly connected to the top of one gear 22. A second motor 24 is fixedly installed on one inner wall of the rectangular groove 16. A first screw 25 is fixedly installed on the output shaft of the second motor 24. The first screw 25 is threadedly connected to the movable seat 17.

[0026] In this embodiment, the sewage collection mechanism includes a push plate 35 slidably mounted on the top of the base 1. A placement seat 36 is fixedly mounted on one side of the push plate 35. A collection box 37 is fixedly mounted on the top of the placement seat 36 by screws. A box cover 38 is fixedly mounted on the top of the collection box 37 by bolts. A water inlet pipe 39 is fixedly connected to the box cover 38. L-shaped drain holes 9 are opened on both mounting plates 6. The outer side of the water inlet pipe 39 contacts the inner wall of the corresponding L-shaped drain hole 9. A discharge pipe is fixedly connected to the outer side of the collection box 37. A valve is provided on the discharge pipe. A vertical plate 40 is fixedly mounted on the top of the base 1. A second screw 41 is rotatably mounted on one side of the vertical plate 40. The second screw 41 is threadedly connected to the push plate 35.

[0027] In this embodiment, the lifting mechanism includes two third motors 43 fixedly installed on the top of the top plate 3. A third screw 44 is fixedly installed on the output shaft of each of the two third motors 43. Both third screws 44 are threadedly connected to the lifting plate 14. A first bevel gear 45 is fixedly sleeved on the outer side of one of the two third screws 44. A second bevel gear 42 meshes with the first bevel gear 45. The second bevel gear 42 is fixedly installed on one end of the second screw 41. Two horizontal holes are opened on the vertical plate 2. The water pipe 39 and the outer side of the second screw 41 are in contact with the inner wall of the two horizontal holes respectively.

[0028] In this embodiment, the flipping mechanism includes a fourth motor 12 fixedly installed on one side of the vertical plate 2. A worm gear 13 is fixedly installed on the output shaft of the fourth motor 12. A transmission rod 10 is fixedly installed at one end of the rotating shaft 4. A worm wheel 11 is fixedly installed at one end of the transmission rod 10. The worm gear 13 meshes with the worm wheel 11. A bearing is fixedly installed on the outer side of the vertical plate 2. The inner ring of the bearing is fixedly connected to the bottom end of the worm gear 13. The bearing enables the worm gear 13 to rotate stably.

[0029] In use, the electric push rod 8 pushes the mounting plate 6 downwards, which in turn moves the cutter 7 downwards to slice the pathological sample. After slicing, the fourth motor 12 drives the worm gear 13 to rotate, which in turn drives the worm wheel 11 to rotate. The worm wheel 11 then drives the transmission rod 10 to rotate, which in turn drives the rotating shaft 4 to rotate. The rotating shaft 4 then drives the two fixed seats 5 to rotate, causing the two cutters 7 to exchange positions. Then, the two third motors 43 are activated, which drive the two third screws 44 to rotate, thus... The lifting plate 14 moves downward, causing its bottom to contact the top of the mounting plate 6 above. Simultaneously, the third screw 44 drives the first bevel gear 45 to rotate, which in turn drives the second bevel gear 42 to rotate. The second bevel gear 42 then drives the second screw 41 to rotate, causing the push plate 35, threadedly connected to the second screw 41, to move to the left. The push plate 35 then moves the placement seat 36 to the left, which in turn moves the collection box 37 to the left. The collection box 37 then moves the lid 38 to the left. The water inlet pipe 39 is moved to the left, allowing it to insert into the L-shaped drain hole 9. Then, the water pump 29, the first motor 23, and the second motor 24 are started. The water pump 29 draws disinfectant from the water tank 28. The disinfectant is then diverted through the three-way valve 30 to two delivery pipes 31, which then deliver it to two rectangular cavities 26. Finally, the disinfectant is sprayed from multiple spray holes 27 to clean the front and back sides of the cutter 7. The first motor 23 drives a gear 22 to rotate, and the two gears 22 mesh, thereby... Two gears 22 drive two vertical rods 20 to rotate, and the two vertical rods 20 drive the brush bristles 21 on them to rotate. The second motor 24 drives the first screw 25 to rotate, causing the moving seat 17 to move to the right, which in turn causes the two vertical rods 20 to move to the right. The brush bristles 21 brush the front and back sides of the cutter 7. The waste liquid generated during cleaning enters the collection box 37 through the L-shaped drain hole 9 and the water pipe 39. After cleaning, the hot air blower 32 is turned on to blow hot air into the protective frame 15 to dry the cutter 7. The moisture is discharged from the air outlet 33.

[0030] Example 2

[0031] The difference between this embodiment and Embodiment 1 is that an ultraviolet germicidal lamp is fixedly installed inside the protective frame 15. After cleaning and drying, the ultraviolet germicidal lamp is turned on to perform sterilization.

[0032] The rest is the same as in Example 1.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pathological microtome slicing device, comprising a base (1), characterized in that, Two vertical plates (2) are fixedly installed on the top of the base (1). A lifting plate (14) is slidably installed between the two vertical plates (2). A cleaning mechanism is provided on the lifting plate (14). A top plate (3) is fixedly installed on the top of the two vertical plates (2). A lifting mechanism is provided on the top plate (3). The lifting mechanism cooperates with the lifting plate (14). A rotating shaft (4) is rotatably installed on the two vertical plates (2). Two symmetrically arranged fixed seats (5) are fixedly installed on the outer side of the rotating shaft (4). The two fixed seats (5) are on opposite sides. The base (1) is provided with a mounting plate (6), and a cutter (7) is fixedly installed on the side of the two mounting plates (6) that are far apart from each other. The top of the base (1) is provided with a sewage collection mechanism, which cooperates with the mounting plate (6). One side of one of the two vertical plates (2) is provided with a flipping mechanism, which cooperates with the rotating shaft (4). The two fixed seats (5) are provided with positioning grooves on the side of the two fixed seats that are far apart from each other. Electric push rods (8) are fixedly installed in the two positioning grooves. The output shafts of the two electric push rods (8) are fixedly connected to the two mounting plates (6) respectively.

2. The pathological sectioning device according to claim 1, characterized in that, The cleaning mechanism includes a protective frame (15) fixedly installed at the bottom of the lifting plate (14). The bottom of the protective frame (15) is in contact with a mounting plate (6). One of the two cutters (7) is located inside the protective frame (15). Two symmetrically arranged rectangular cavities (26) are opened on the protective frame (15). Multiple water spray holes (27) are opened on the inner walls of the front and rear sides of the protective frame (15). The multiple water spray holes (27) are connected to the two rectangular cavities (26). A hot air blower (32) is fixedly installed on the outside of the protective frame (15). The air outlet of the hot air blower (32) is connected to the inside of the protective frame (15). A guide plate (34) is fixedly installed on one inner wall of the protective frame (15). An air outlet (33) is opened on one side of the protective frame (15).

3. The pathological sectioning device according to claim 2, characterized in that, A water tank (28) is fixedly installed on one side of the protective frame (15). A water inlet is provided on one side of the water tank (28). A water pump (29) is fixedly installed at the bottom of the water tank (28). The inlet of the water pump (29) is fixedly connected to the inside of the water tank (28). The outlet of the water pump (29) is fixedly connected to one interface of a tee (30). The other two interfaces of the tee (30) are fixedly connected to delivery pipes (31). The two delivery pipes (31) are fixedly connected to two rectangular cavities (26) respectively.

4. The pathological sectioning device according to claim 3, characterized in that, The bottom of the lifting plate (14) is provided with a rectangular groove (16), and a movable seat (17) is slidably installed in the rectangular groove (16). The bottom of the movable seat (17) is provided with an installation groove (18), and a bearing plate (19) is fixedly installed in the installation groove (18). Two vertical rods (20) are rotatably installed on the bearing plate (19), and brush bristles (21) are fixedly installed on the outer side of the two vertical rods (20). The vertical rods (20) are located inside the protective frame (15).

5. The pathological sectioning device according to claim 4, characterized in that, Gears (22) are fixedly installed at the top of both vertical rods (20), and the two gears (22) mesh with each other. A first motor (23) is fixedly installed on the top inner wall of the mounting groove (18), and the output shaft of the first motor (23) is fixedly connected to the top of one gear (22). A second motor (24) is fixedly installed on the inner wall of one side of the rectangular groove (16), and a first screw (25) is fixedly installed on the output shaft of the second motor (24). The first screw (25) is threadedly connected to the movable seat (17).

6. The pathological sectioning apparatus according to claim 5, characterized in that, The sewage collection mechanism includes a push plate (35) slidably mounted on the top of the base (1). A placement seat (36) is fixedly mounted on one side of the push plate (35). A collection box (37) is fixedly mounted on the top of the placement seat (36) by screws. A box cover (38) is fixedly mounted on the top of the collection box (37) by bolts. A water inlet pipe (39) is fixedly connected to the box cover (38). L-shaped drain holes (9) are opened on both mounting plates (6). The outer side of the water inlet pipe (39) contacts the inner wall of the corresponding L-shaped drain hole (9). A discharge pipe is fixedly connected to the outer side of the collection box (37). A valve is provided on the discharge pipe.

7. The pathological sectioning apparatus according to claim 6, characterized in that, A vertical plate (40) is fixedly installed on the top of the base (1), and a second screw (41) is rotatably installed on one side of the vertical plate (40). The second screw (41) is threadedly connected to the push plate (35).

8. The pathological sectioning apparatus according to claim 7, characterized in that, The lifting mechanism includes two third motors (43) fixedly installed on the top of the top plate (3). A third screw (44) is fixedly installed on the output shaft of each of the two third motors (43). Both third screws (44) are threadedly connected to the lifting plate (14). A first bevel gear (45) is fixedly sleeved on the outer side of one of the two third screws (44). A second bevel gear (42) meshes with the first bevel gear (45). The second bevel gear (42) is fixedly installed on one end of the second screw (41).

9. A pathological sectioning apparatus according to claim 8, characterized in that, Two horizontal holes are provided on the vertical plate (2), and the outer side of the water pipe (39) and the second screw (41) respectively contacts the inner wall of the two horizontal holes.

10. A pathological sectioning apparatus according to claim 9, characterized in that, The flipping mechanism includes a fourth motor (12) fixedly installed on one side of the vertical plate (2). A worm (13) is fixedly installed on the output shaft of the fourth motor (12). A transmission rod (10) is fixedly installed at one end of the rotating shaft (4). A worm wheel (11) is fixedly installed at one end of the transmission rod (10). The worm (13) meshes with the worm wheel (11). A bearing is fixedly installed on the outer side of the vertical plate (2). The inner ring of the bearing is fixedly connected to the bottom end of the worm (13).

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