Multi-angle material taking device

Abstract

The multi-angle material taking device solves the problem that a suction head moves back and forth, a driving assembly comprises a rack, a first linear module, a second linear module and a third linear module, the first linear module is arranged on the rack, the second linear module is arranged on the rack, and the third linear module is arranged on the rack. The second linear module is arranged at the driving end of the first linear module, and the third linear module is arranged at the driving end of the second linear module; the suction head adsorbs the annular material, ascends by the set height, then can be thrown out through rotation, stays above the adjacent annular material through rotation, moves away after receiving by other equipment, and then descends by the set height and adsorbs the annular material under the driving of the first air cylinder, and the stroke of the suction head is reduced, so that the problem that the suction head moves back and forth is solved.

Description

Technical Field

[0001] The utility model relates to the field of material grasping, in particular to a device for taking materials from multiple angles. Background Art

[0002] For conventional material taking equipment, the manipulator needs to move its position each time it grasps a material, then grasp the next one, and at the same time, it also needs to shift to send the grasped material to the next station. Generally, it can meet the requirements, but the process of moving back and forth to grasp and then send the material takes a long time, and overall, the efficiency needs to be improved.

[0003] How to make the manipulator take and place materials faster is the problem to be solved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for taking materials from multiple angles, which solves the problem of the suction head moving back and forth.

[0005] To achieve the above object, the technical solution adopted by the utility model is:

[0006] The utility model provides a device for taking materials from multiple angles, including a driving component, a rotating component, and an adsorption component. The rotating component is arranged on the driving component, and the adsorption component is arranged on the rotating component. It is characterized in that,

[0007] The driving component includes a frame, a first linear module, a second linear module, and a third linear module. The first linear module is arranged on the frame, the second linear module is arranged at the driving end of the first linear module, and the third linear module is arranged at the driving end of the second linear module;

[0008] The rotating component includes a first cylinder, a motor, and a gearbox. The first cylinder is arranged at the driving end of the third linear module, the motor is arranged at the driving end of the first cylinder, and the driving end of the motor is connected to the input end of the gearbox;

[0009] The adsorption component includes a hanging plate, a suction block, and a suction head. The hanging plate is rotatably connected to the output end of the gearbox. The suction block is arranged on the hanging plate. A channel is arranged inside the suction block, and an air duct is arranged inside the suction head. The suction head is docked with the suction block, and the air duct is communicated with the channel. The outside of the channel is used to connect to a suction device, and the air duct is used to adsorb products;

[0010] The driving component drives the rotating component to move in a three-dimensional space.

[0011] Optionally, the driving component further includes a back plate, the back plate is arranged at the driving end of the second linear module, and the third linear module is arranged on the back plate.

[0012] Furthermore, the rotating assembly also includes a sliding column, a first slider, a second slider and a hanging plate, the first slider is arranged on the driving end of the third linear module, the sliding column is arranged on the back plate, the extension direction of the sliding column is consistent with the moving direction of the first slider, the second slider is slidingly arranged on the sliding column, the hanging plate is arranged on the first slider and the second slider, and the first cylinder is arranged on the hanging plate.

[0013] Optionally, the rotating assembly also includes a base plate, which is arranged at the driving end of the first cylinder, the driving direction of the first cylinder forms an angle with the extension direction of the base plate, the base plate has an upper through hole, the gear box and the first cylinder are both arranged at the bottom of the base plate, the gear box has a lower through hole, the lower through hole is communicated with the upper through hole, and the suction block is located below the lower through hole.

[0014] Furthermore, a limit block is arranged at the bottom of the base plate, the limit block has a limit groove, a limit rod is arranged on the hanging plate, the limit rod is located in the limit groove, and the extension direction of the limit rod is aligned with the lower surface of the base plate.

[0015] Furthermore, a connecting rod is provided on the limiting rod, and a photoelectric switch is also provided on the bottom plate, and the rotation path of the connecting rod passes through the sensing area of ​​the photoelectric switch.

[0016] Optionally, the adsorption assembly also includes a side plate, a second cylinder, a slide rail and a connecting plate, the side plate is arranged at the bottom of one side of the hanging plate, the slide rail is arranged on the side plate, the extension direction of the slide rail is the same as the driving direction of the first cylinder, the driving end of the second cylinder is connected to the slide rail, the connecting plate is arranged on the second cylinder, and the suction block is arranged on the connecting plate.

[0017] Furthermore, an avoidance groove is provided at the bottom of the side plate, a flange joint is provided at the inlet end of the channel, and the avoidance groove is located on the moving path of the flange joint.

[0018] Optionally, the suction block includes an integrally formed horizontal block and vertical block, the vertical block is provided with an air hole, the channel is located in the horizontal block, the channel is communicated with the air hole, a plurality of hidden channels are also provided in the vertical block, the hidden channels are communicated with the air holes, the number of the hidden channels matches the number of the hidden channels, the hidden channels are communicated with the air channels, and the plurality of the air channels are distributed on the same circle.

[0019] Furthermore, a plurality of upper connecting blocks are arranged on the outer wall of the vertical block, a slide groove is arranged on the lower surface of the upper connecting block, the slide groove extends to the outer edge of the upper connecting block, a plurality of lower connecting blocks are arranged on the outer wall of the suction head, an air groove is arranged on the upper surface of the lower connecting block, the air channel is communicated with the air groove, the lower connecting block is slidably arranged in the slide groove, the upper connecting block covers the open end of the air groove, the dark channel is communicated with the air groove, and the dark channel and the air channel are respectively located on both sides of the air groove.

[0020] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0021] The utility model discloses a multi-angle material taking device. As a first cylinder drives a motor and a gear box to rise or fall, the motor drives the internal gears of the gear box to rotate, thereby driving the suction block to rotate. The suction head and the gear box are respectively located at two ends of the suction block, so the suction head rotates with the output end of the gear box as the center of the circle. The rotation path of the suction head is on a circle. The suction head absorbs the annular material, rises to a set height, and then can be delivered through rotation. The rotation stays above the adjacent annular material, and other equipment receives and moves away. Then, driven by the first cylinder, the suction head descends to a set height, and then absorbs the annular material. The stroke of the suction head is reduced, thereby solving the problem of the suction head moving back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0023] Figure 1 It is a three-dimensional view of a device for taking materials at multiple angles according to a preferred embodiment of the utility model;

[0024] Figure 2 yes Figure 1 An enlarged view of the rotating assembly and the adsorption assembly shown;

[0025] Figure 3 yes Figure 2 An enlarged view of the adsorption assembly shown attached to the base plate;

[0026] Figure 4 yes Figure 1 A bottom view of the adsorption assembly shown;

[0027] Figure 5 yes Figure 1 A right side view of the adsorption assembly shown;

[0028] Figure 6 It is a three-dimensional view of the suction block and the suction head;

[0029] Figure 7 is a sectional view of the suction block and the suction head;

[0030] Figure 8 is a bottom view of the suction block and the suction head;

[0031] Figure 9 is a top view of the suction block and the suction head.

[0032] Among them, the reference numerals are explained as follows:

[0033] 1. Driving assembly; 2. Rotating assembly; 3. Adsorption assembly; 4. Connecting rod; 5. Photoelectric switch;

[0034] 6. Flange joint; 7. Positioning piece; 8. Workpiece; 9. Backing plate; 10. Frame; 11. First linear module; 12. Second linear module; 13. Third linear module; 14. Back plate; 15. Limiting piece; 20. Limiting rod; 21. First cylinder; 22. Motor; 23. Gearbox; 24. Slide post; 25. First slider; 26. Second slider; 27. Hanging plate; 28. Bottom plate; 29. Limiting block; 30. Side plate; 31. Hanging plate; 32. Suction block; 33. Suction head; 34. Channel; 35. Air duct; 36. Second cylinder; 37. Slide rail; 38. Connecting plate; 39. Air hole; 230. Lower through hole; 280. Upper through hole; 290. Limiting groove; 300. Avoidance groove; 320. Hidden passage; 321. Horizontal block; 322. Vertical block; 323. Upper connecting block; 324. Chute; 331. Lower connecting block; 332. Air groove. Detailed implementation manners

[0035] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] As Figure 1 and Figure 2 and Figure 3 shown, it includes a driving component 1, a rotating component 2, and an adsorption component 3. The rotating component 2 is arranged on the driving component 1, and the adsorption component 3 is arranged on the rotating component 2. The driving component 1 includes a frame 10, a first linear module 11, a second linear module 12, and a third linear module 13. The first linear module 11 is arranged on the frame 10, the second linear module 12 is arranged at the driving end of the first linear module 11, and the third linear module 13 is arranged at the driving end of the second linear module 12. The first linear module 11 drives the second linear module 12 to move horizontally, and the second linear module 12 drives the third linear module 13 to move vertically. The driving component 1 drives the rotating component 2 to move in a three-dimensional space.

[0039] The rotating component 2 includes a first cylinder 21, a motor 22, a gearbox 23, and a bottom plate 28. The first cylinder 21 is arranged at the driving end of the third linear module 13. The third linear module 13 drives the first cylinder 21 to move in the vertical direction. The bottom plate 28 is connected to the driving end of the first cylinder 21. The first cylinder 21 drives the bottom plate 28 to move in the vertical direction. The driving end of the motor 22 is connected to the input end of the gearbox 23. The gearbox 23 is arranged at the bottom of the bottom plate 28. The first cylinder 21 and the gearbox 23 are respectively located at both ends of the bottom plate 28.

[0040] The adsorption component 3 includes a hanging plate 31, a suction block 32, and a suction head 33. The hanging plate 31 is rotatably connected to the output end of the gearbox 23. The hanging plate 31 can set the rotation direction and angle. The suction block 32 is arranged on the hanging plate 31, and the suction head 33 is arranged on the suction block 32. A channel 34 is arranged in the suction block 32 for gas flow. The channel 34 is externally connected to a suction device.

[0041] An air passage 35 is arranged in the suction head 33. The suction head 33 and the gearbox 23 are respectively located at both ends of the suction block 32. The air passage 35 is communicated with the channel 34. The air passage 35 is used for adsorbing the workpiece 8. The workpiece 8 is attached to the suction end of the air passage 35, that is, the workpiece 8 is attached to the suction end of the suction head 33.

[0042] The suction head 33 rotates around the gearbox 23. Therefore, after the suction head 33 descends to the set height, it adsorbs the workpiece through the air duct 35, and then resets. While resetting, the motor 22 drives the gears in the gearbox 23 to rotate, and the output end of the gearbox 23 drives the bottom plate 28 to rotate. So the suction head 33 also rotates, and the rotation trajectory of the adsorption end of the suction head 33 is on a circumference. The suction head 33 then docks the adsorbed workpiece 8 with other settings. Therefore, all the workpieces 8 under the rotation path of the adsorption end of the suction head 33 can be adsorbed by the suction head 33.

[0043] The driving assembly 1 further includes a back plate 14. The back plate 14 is arranged on the driving end of the second linear module 12, and the third linear module 13 is arranged on the back plate 14. The back plate 14 can carry heavier components.

[0044] The rotating assembly 2 further includes a sliding column 24, a first slider 25, a second slider 26 and a hanging plate 27. The first slider 25 is arranged on the driving end of the third linear module 13. The sliding column 24 is arranged on the back plate 14. The extending direction of the sliding column 24 is the same as the moving direction of the first slider 25. The second slider 26 is slidably arranged on the sliding column 24. In this way, the moving direction of the first slider 25 is the same as the moving direction of the second slider 26. The hanging plate 27 is arranged on the first slider 25 and the second slider 26, and the first cylinder 21 is arranged on the hanging plate 27.

[0045] Furthermore, a backing plate 9 is arranged on the back plate 14, and the sliding column 24 is arranged on the backing plate 9. In this way, the hanging plate 27 can be stably arranged on the first slider 25 and the second slider 26. The first slider 25 and the second slider 26 are respectively located on both sides of the hanging plate 27, and both sides of the hanging plate 27 are at the same height.

[0046] The driving direction of the first cylinder 21 forms an angle with the extending direction of the bottom plate 28. In this application, the driving direction of the first cylinder 21 is perpendicular to the extending direction of the bottom plate 28. The bottom plate 28 has an upper through hole 280, and the gearbox 23 has a lower through hole 230. The lower through hole 230 communicates with the upper through hole 280. The suction block 32 is located below the lower through hole 230, and the position of the workpiece 8 is determined by the lower through hole 230 and the upper through hole 280.

[0047] Such as Figure 4 and Figure 5 and Figure 6As shown, a limit block 29 is provided at the bottom of the bottom plate 28. The limit block 29 has a limit groove 290. The limit block 29 is spaced apart from the gearbox 23. The limit block 29 is located above the rotation path of the hanging plate 31. A limit rod 20 is provided on the hanging plate 31. The extending direction of the limit rod 20 is aligned with the lower surface of the bottom plate 28. The limit rod 20 is located within the limit groove 290. In this way, when the hanging plate 31 rotates, the limit rod 20 rotates within the limit groove 290, and the side wall body where the limit groove 290 is located restricts the movement of the limit rod 20, that is, the rotation path of the limit rod 20 is restricted by the limit groove 290.

[0048] A connecting rod 4 is provided on the limit block 29. The bottom plate 28 is further provided with a photoelectric switch 5. The rotation path of the connecting rod 4 passes through the sensing area of the photoelectric switch 5. When the bottom plate 28 rotates in either direction, the connecting rod 4 will pass through the sensing area of the photoelectric switch 5. When the connecting rod 4 is within the sensing area of the photoelectric switch 5, the hanging plate 31 is in the initial position.

[0049] The adsorption assembly 3 further includes a side plate 30, a second cylinder 36, a slide rail 37 and a connecting plate 38. The side plate 30 is provided at the bottom of one side of the hanging plate 31. The slide rail 37 is provided on the side plate 30. The slide rail 37 is vertically arranged, and the extending direction of the slide rail 37 is the same as the driving direction of the first cylinder 21, both vertically downward. The driving end of the second cylinder 36 is connected to the slide rail 37. The second cylinder 36 can slide on the slide rail 37. The connecting plate 38 is provided on the second cylinder 36. The suction block 32 is provided on the connecting plate 38. After the suction end of the suction head 33 is aligned with the workpiece, the second cylinder 36 drives the connecting plate 38 and the suction block 32 to descend to a set height, and then the suction head 33 starts to adsorb the workpiece 8. Then, under the drive of the second cylinder 36, the connecting plate 38 and the suction block 32 reset, and the suction head 33 adsorbs the workpiece 8 and rises together.

[0050] A limit piece 15 is further provided on the side plate 30. The limit piece 15 is located at the bottom of the slide rail 37. In this way, when the second cylinder 36 slides to the lowest position, it is blocked by the limit piece 15 to prevent the second cylinder 36 from falling off the slide rail 37.

[0051] A relief groove 300 is provided at the bottom of the side plate 30. A flange joint 6 is provided at the inlet end of the channel 34. The relief groove 300 is located on the movement path of the flange joint 6. When the suction block 32 rises or falls, the flange joint 6 rises or falls accordingly. In this way, the relief groove 300 can accommodate the flange joint 6, and the top wall body of the relief groove 300 can block the flange joint 6 from rising further, that is, the rising height of the flange joint 6 is limited. Through the relief groove 300, the flange joint 6 is externally connected to the air source.

[0052] Such as Figure 7 and Figure 8 and Figure 9As shown, the suction block 32 includes a horizontally integrated block 321 and a vertically integrated block 322. The horizontally integrated block 321 is arranged on the connecting plate 38. An air hole 39 is arranged on the vertically integrated block 322. The channel 34 is located inside the horizontally integrated block 321. The channel 34 communicates with the air hole 39. A plurality of dark channels 320 are also arranged inside the vertically integrated block 322. The dark channels 320 communicate with the air hole 39. The number of the air channels 35 matches the number of the dark channels 320. The dark channels 320 communicate with the air channels 35. A plurality of air channels 35 are distributed on the same circumference.

[0053] When the suction device sucks air, the opening end of the air hole 39 can be opened or closed. The air flow passes through the dark channels 320 from the air channels 35, then comes out and passes through the channel 34. If the air flow is too large and the load pressure of the air channels 35 is too high, the air hole 39 can be opened to exhaust air, reducing the suction force inside the air channels 35. If the adsorption force of the air channels 35 is too small, the air hole 39 can be closed to always keep the adsorption force of the air channels 35 appropriate. If the adsorption force of the air channels 35 is too small, the workpiece 8 cannot be adsorbed. If the adsorption force of the air channels 35 is too large, the workpiece 8 may be damaged by adsorption.

[0054] A plurality of upper connecting blocks 323 are arranged on the outer wall of the vertically integrated block 322. A sliding groove 324 is arranged on the lower surface of the upper connecting block 323. The sliding groove 324 extends to the outer edge of the upper connecting block 323. A plurality of lower connecting blocks 331 are arranged on the outer wall of the suction head 33. An air groove 332 is arranged on the upper surface of the lower connecting block 331. The air channel 35 communicates with the air groove 332. The lower connecting block 331 is slidably arranged in the sliding groove 324. The upper connecting block 323 covers the opening end of the air groove 332. The dark channel 320 communicates with the air groove 332. The dark channel 320 and the air channel 35 are respectively located at both ends of the air groove 332. The suction block 32 and the suction head 33 are detachably connected by a screw.

[0055] A positioning piece 7 is arranged at the bottom end of the lower connecting block 331. In this application, the workpiece 8 is a ring. The bottom end of the lower connecting block 331 abuts against the workpiece 8. The bottom ends of a plurality of lower connecting blocks 331 can simultaneously abut against the workpiece 8. The suction end of the air channel 35 is located at the bottom end of the lower connecting block 331. In this way, the suction end of the air channel 35 fits against the workpiece 8. Since the workpiece 8 is ring-shaped, the positioning piece 7 has a curvature. Before the suction head 33 adsorbs the workpiece 8, a plurality of positioning pieces 7 are distributed on the outer edge of the workpiece 8. A plurality of positioning pieces 7 are on the same circumference. The workpiece 8 is located in the middle of a plurality of positioning pieces 7.

[0056] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-angle material taking device, comprising a driving component (1), a rotating component (2) and an adsorption component (3), wherein the rotating component (2) is arranged on the driving component (1), and the adsorption component (3) is arranged on the rotating component (2), characterized in that: The driving assembly (1) comprises a frame (10), a first linear module (11), a second linear module (12) and a third linear module (13); the first linear module (11) is arranged on the frame (10), the second linear module (12) is arranged at a driving end of the first linear module (11), and the third linear module (13) is arranged at a driving end of the second linear module (12); The rotating assembly (2) comprises a first cylinder (21), a motor (22), a gear box (23) and a base plate (28); the first cylinder (21) is arranged at a driving end of the third linear module (13); the base plate (28) is connected to the driving end of the first cylinder (21); the gear box (23) is arranged at the bottom of the base plate (28); and the driving end of the motor (22) is connected to an input end of the gear box (23); The adsorption assembly (3) comprises a hanging plate (31), a suction block (32) and a suction head (33); the hanging plate (31) is connected to the output end of the gear box (23) in a rotatable manner; the suction block (32) is arranged on the hanging plate (31); the suction head (33) is arranged on the suction block (32); a channel (34) is arranged in the suction block (32); an air channel (35) is arranged in the suction head (33); the suction head (33) and the gear box (23) are respectively located at two ends of the suction block (32); the air channel (35) is communicated with the channel (34); the outside of the channel (34) is used to connect an external suction device; and the air channel (35) is used to adsorb workpieces; The driving component (1) drives the rotating component (2) to move in a three-dimensional space.

2. The multi-angle material taking device according to claim 1, characterized in that: The driving assembly (1) further comprises a back plate (14), wherein the back plate (14) is arranged on the driving end of the second linear module (12), and the third linear module (13) is arranged on the back plate (14).

3. The multi-angle material taking device according to claim 2, characterized in that: The rotating assembly (2) further comprises a sliding column (24), a first slider (25), a second slider (26) and a hanging plate (27), wherein the first slider (25) is arranged on the driving end of the third linear module (13), the sliding column (24) is arranged on the back plate (14), the extension direction of the sliding column (24) is consistent with the moving direction of the first slider (25), the second slider (26) is slidably arranged on the sliding column (24), the hanging plate (27) is arranged on the first slider (25) and the second slider (26), and the first cylinder (21) is arranged on the hanging plate (27).

4. The multi-angle material taking device according to claim 1, characterized in that: The driving direction of the first cylinder (21) forms an angle with the extension direction of the base plate (28); the base plate (28) has an upper through hole (280); the gear box (23) has a lower through hole (230); the lower through hole (230) is in communication with the upper through hole (280); and the suction block (32) is located below the lower through hole (230).

5. The multi-angle material taking device according to claim 4, characterized in that: A limit block (29) is disposed at the bottom of the bottom plate (28), the limit block (29) having a limit slot (290), and a limit rod (20) is disposed on the hanging plate (31), the limit rod (20) is located in the limit slot (290), and the extension direction of the limit rod (20) is aligned with the lower surface of the bottom plate (28).

6. The multi-angle material taking device according to claim 5, characterized in that: The limiting rod (20) is provided with a connecting rod (4), and the bottom plate (28) is also provided with a photoelectric switch (5). The rotation path of the connecting rod (4) passes through the sensing area of ​​the photoelectric switch (5).

7. The multi-angle material taking device according to claim 1, characterized in that: The adsorption assembly (3) further comprises a side plate (30), a second cylinder (36), a slide rail (37) and a connecting plate (38); the side plate (30) is arranged at the bottom of one side of the hanging plate (31); the slide rail (37) is arranged on the side plate (30); the extension direction of the slide rail (37) is the same as the driving direction of the first cylinder (21); the driving end of the second cylinder (36) is connected to the slide rail (37); the connecting plate (38) is arranged on the second cylinder (36); and the suction block (32) is arranged on the connecting plate (38).

8. The multi-angle material taking device according to claim 7, characterized in that: The bottom of the side plate (30) is provided with an avoidance groove (300), the inlet end of the channel (34) is provided with a flange joint (6), and the avoidance groove (300) is located on the moving path of the flange joint (6).

9. The multi-angle material taking device according to claim 1, characterized in that: The suction block (32) comprises an integrally formed horizontal block (321) and a vertical block (322); an air hole (39) is provided on the vertical block (322); the channel (34) is located in the horizontal block (321); the channel (34) is communicated with the air hole (39); a plurality of hidden channels (320) are further provided in the vertical block (322); the hidden channels (320) are communicated with the air hole (39); the number of the air channels (35) matches the number of the hidden channels (320); the hidden channels (320) are communicated with the air channels (35); and the plurality of air channels (35) are distributed on the same circumference.

10. The multi-angle material taking device according to claim 9, characterized in that: A plurality of upper connecting blocks (323) are arranged on the outer wall of the vertical block (322), a slide groove (324) is arranged on the lower surface of the upper connecting block (323), and the slide groove (324) extends to the outer edge of the upper connecting block (323); a plurality of lower connecting blocks (331) are arranged on the outer wall of the suction head (33), an air groove (332) is arranged on the upper surface of the lower connecting block (331), the air channel (35) is communicated with the air groove (332), the lower connecting block (331) is slidably arranged in the slide groove (324), the upper connecting block (323) covers the open end of the air groove (332), the dark channel (320) is communicated with the air groove (332), and the dark channel (320) and the air channel (35) are respectively located at two ends of the air groove (332).

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