Cleaning roller of mahjong cleaning machine

Abstract

A cleaning roller of a mahjong cleaning machine comprises a roller body, a plurality of first brush belts are arranged on the surface of the roller body, each first brush belt comprises a plurality of first brush heads arranged on the surface of the roller body, and a spiral overturning pit capable of containing part of mahjong is arranged between each first brush belt and the adjacent first brush belt. The first brush belt is used for rotating and extruding the mahjong to move in the rotating direction of the roller body and the rotating axis direction of the roller body so that the mahjong can be turned over during cleaning.

Description

Technical Field

[0001] The present invention relates to the field of mahjong, and specifically to a cleaning roller of a mahjong cleaning machine. Background Art

[0002] A Chinese patent with the application number CN202310968423.1 discloses a multifunctional mahjong cleaning machine, including a drum cleaning mechanism (rotating frame) with a first brush head on the inner wall and a rotating shaft inside the drum with a second brush head on the outer peripheral surface. The drum cleaning mechanism includes a drum body and a drum door. The rotating shaft inside the drum is fixed to the drum cleaning mechanism. Therefore, when cleaning mahjong, the relative displacement between the brush head and the mahjong is very small, and the cleaning effect is not good.

[0003] A Chinese patent with the application number CN201911118591.1 discloses a conveyor-type mahjong cleaning machine, which relates to the technical field of mahjong machines. It includes a frame, a first transportation mechanism for guiding magnetic mahjong for preliminary cleaning, a first cleaning mechanism for preliminary cleaning magnetic mahjong, a second transportation mechanism for guiding magnetic mahjong for secondary cleaning, a second cleaning mechanism for secondary cleaning magnetic mahjong, a third transportation mechanism for guiding magnetic mahjong for drying, a drying mechanism for drying magnetic mahjong, and a fourth transportation mechanism for storing magnetic mahjong. Although each of the six faces of each mahjong is cleaned one by one, due to high costs, the cleaning speed is slow.

[0004] A Chinese patent with the application number 201921836183.5 discloses a mahjong cleaning device, including at least two layers of rollers arranged from top to bottom. The number of rollers in each layer is at least two. The connecting line of the centers of the adjacent upper and lower rollers is inclined at 30 to 60 degrees. The cleaning area formed by the rollers is of a structure that is wider at the top and narrower at the bottom. The rotating rollers (cleaning rollers) continuously rub and tumble the mahjong. This mahjong cleaning device has been widely sold on the market and is divided into two specifications for cleaning 36 - 50# and 52 - 64# mahjong respectively. When this mahjong cleaning machine cleans mahjong, the mahjong is stacked on the rollers, and the brush rollers slowly squeeze the lower mahjong upwards by centrifugal force. During this process, it is very difficult for the upper mahjong to move downwards. Therefore, it takes a very long time to complete the cleaning of mahjong. In addition, the situation of scratching the pigments will occur. Summary of the Invention

[0005] The purpose of the present invention is to provide a cleaning roller of a mahjong cleaning machine, which can continuously flip the mahjong when cleaning the mahjong.

[0006] To achieve the above object, the present invention provides a cleaning roller for a mahjong cleaning machine, including a roller body, characterized in that a plurality of first brush belts are provided on the surface of the roller body, the first brush belt includes a plurality of first brush heads arranged on the surface of the roller body, a spiral turning recess for accommodating a part of the mahjong is provided between the first brush belt and an adjacent first brush belt, and the first brush belt is used to rotate and extrude the mahjong to move along the rotation direction of the roller body and the rotation axis direction of the roller body so that the mahjong is turned during cleaning.

[0007] Preferably, the discharge cover covers the discharge port, and the rotation axis of the rotating frame extends downward from the feed port towards the discharge port. In this way, after the discharge cover is opened, the rotation of the rotating frame can be controlled, and as the rotating frame rotates, the mahjong gradually falls from the discharge port, without the need to take out the mahjong from the accommodating cavity by hand as in the prior art.

[0008] Preferably, the plurality of cleaning rollers include a brush roller and a cloth roller arranged at intervals. A plurality of brushing parts are provided on the outer peripheral surface of the brush roller, and the cloth roller is wrapped with a sponge sleeve and a cloth tube sleeved outside the sponge sleeve. The cloth tube can well coat the absorbed cleaning agent on the mahjong and wipe the surface of the mahjong, and the brush roller rotates at a high speed to realize the brushing of the mahjong.

[0009] Preferably, it further includes an opening cover driving device for driving the discharge cover to open. After the cleaning is completed, the opening cover driving device can be controlled to open the discharge cover.

[0010] The present invention provides a feeding device for a mahjong cleaning machine. The mahjong cleaning machine has a frame and an accommodating cavity. The feeding device includes a hopper fixed to the frame and extending towards the feed port of the accommodating cavity. The hopper is connected with a dumping plate, and the dumping plate can move from a closed position covering the feed port to a receiving position away from the feed port and abutting against the mahjong table. The dumping plate includes a vertical plate and a horizontal plate, and the horizontal plate is used to cross the border of the mahjong table and abut against the tabletop of the mahjong table. After the horizontal plate abuts against the tabletop, the user slides the mahjong into the feed port through the horizontal plate, without having to pick up the mahjong and put it into the feed port as in the prior art.

[0011] Preferably, it further includes a controller electrically connected to the electromagnet and the proximity switch. In this way, the controller can control the electromagnet to attract the iron body after the proximity switch detects that the discharge cover is closed.

[0012] The present invention provides a planetary gear transmission structure with a feed port, including a plurality of planetary gears arranged on a turntable and meshing with a large gear ring. The middle of the turntable is provided with a feed port. The turntable is provided with a transmission ring on one side of the planetary gear, and the turntable is provided with a feed pipe extending towards one side of the planetary gear and surrounding the feed port. In this application, the feed port is arranged in the middle of the turntable, and at the same time, the feed pipe is provided to prevent the material flow from falling into the gap between the planetary gear and the rotating disk.

[0013] The present invention provides a connection structure of a cleaning roller, comprising a roller body, a first socket, a second socket, a first plug and a second plug which can be inserted into the first socket and the second socket are provided at both ends of the roller body, the first socket is connected to a rotating part, the first plug and the roller body are slidably connected, the first plug can be moved from an insertion position accommodated in the first socket to a withdrawal position detached from the first socket, and a first compression spring for keeping the first plug in the insertion position is provided between the first plug and the roller body. When the roller body needs to be removed, the user squeezes the first plug to shrink the first compression spring, so that the first plug is separated from the first socket.

[0014] The present invention also provides a connection structure for a cleaning roller, comprising a roller body, a first socket, a second socket, a first plug and a second plug which can be inserted into the first socket and the second socket are provided at both ends of the roller body, the first socket is connected to a rotating part, the first socket and the roller body are slidably connected, the first socket can be moved from a sleeve position for accommodating the first plug to a disengagement position for disengaging from the first plug, and a second compression spring for keeping the first socket in the sleeve position is provided between the first socket and the rotating shaft. When the roller body needs to be removed, the user squeezes the first socket to shrink the second compression spring, thereby separating the first plug from the first socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural diagram of a mahjong cleaning machine according to a first embodiment of the present invention.

[0016] Figure 2 for Figure 1 Exploded view of a mahjong cleaning machine.

[0017] Figure 3 for Figure 2 A partial enlarged view of point A.

[0018] Figure 4 for Figure 2 A local enlarged view of A'.

[0019] Figure 5 for Figure 2 An exploded view of the subject.

[0020] Figure 6 for Figure 5 A partial enlarged view of point B.

[0021] Figure 7 for Figure 2 Exploded view of the feeding device.

[0022] Figure 8 for Figure 7 A partial enlarged view of point C.

[0023] Figure 9 forFigure 7 Structural diagram during the use of the feeding device

[0024] Figure 10 is Figure 9 Partial enlarged view at position D of

[0025] Figure 11 is Figure 2 Explosion diagram of the discharging device of

[0026] Figure 12 is Figure 11 Partial enlarged view at position E of

[0027] Figure 13 is Figure 1 Schematic structural diagram of the planetary gear and rotating shaft of the mahjong cleaning machine of

[0028] Figure 14 is Figure 13 Explosion diagram of the planetary gear and rotating shaft of the mahjong cleaning machine of

[0029] Figure 15 is Figure 5 Explosion diagram of the cloth roller of the mahjong cleaning machine of

[0030] Figure 16 is Figure 5 Schematic structural diagram of the brush roller of the mahjong cleaning machine of

[0031] Figure 17 is Figure 16 Partial enlarged view at position F of

[0032] Figure 18 is Figure 16 Cross-sectional view of the brush roller of

[0033] Figure 19 is Figure 1 Cross-sectional view of the mahjong cleaning machine of

[0034] Figure 20 is Figure 19 Partial enlarged view at position G of Specific implementation manner

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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] Please refer to Figure 1-20 , the mahjong cleaning machine includes a main body 1, a housing 2, a feeding device 3, and a discharging device 4.

[0037] The main body includes a rotating frame 12 arranged on a frame 11, a plurality of cleaning rollers arranged around the rotation axis of the rotating frame 12, and a rotating driving device 10 for driving the rotating frame 12 and the cleaning rollers to rotate. The cleaning rollers are parallel to the rotation axis of the rotating frame 12. The plurality of cleaning rollers surround to form a receiving chamber 100. A feed port 100a is provided at one end of the rotating frame 12. The horizontal angle of the rotation axis of the rotating frame 12 is 0-45 degrees. A discharge cover 41 is provided at one end of the receiving chamber 100 facing away from the feed port 100a. In the present application, the cleaning rollers wipe away dirt on the mahjong by rotating, and at the same time, the rotating frame 12 is used to rotate to make the mahjong rise and then fall, so that the mahjong is continuously turned over. The frame 11 is provided with a cleaning scraper 112 extending toward the brush roller 13.

[0038] The discharge cover 41 covers the discharge port 100b, and the rotation axis of the rotating frame 12 extends downward from the feed port 100a toward the discharge port 100b. In this way, after the discharge cover 41 is opened, the rotating frame 12 can be controlled to rotate, and as the rotating frame 12 rotates, the mahjong gradually falls from the discharge port 100b, and there is no need to take out the mahjong from the accommodating chamber 100 by hand as in the prior art.

[0039] The plurality of cleaning rollers include brush rollers 13 and cloth rollers 14 arranged at intervals. The outer peripheral surface of the brush roller 13 is provided with a plurality of brushing parts. The cloth roller 14 includes a roller body 140, a sponge cover 141 wrapped outside the roller body 140, a cloth tube 142 sleeved outside the sponge cover 141, and plugs 143 arranged at both ends of the roller body 140. The cloth tube 142 can well apply the absorbed cleaning agent on the mahjong and wipe the surface of the mahjong. The brush roller 13 rotates at high speed to brush the mahjong. The plug 143 is a straight-line structure.

[0040] The mahjong cleaning machine also includes a cover opening driving device 42 for driving the discharge cover 41 to open. After cleaning is completed, the cover opening driving device 42 can be controlled to open the discharge cover 41. The inner side of the vertical plates on both sides of the frame 11 is provided with a limit ring 110 that cooperates with the end surface of the rotating disk 121 to prevent the rotating frame 12 from moving along the rotation axis direction.

[0041] The frame 11 is provided with a large gear ring 111 , the cleaning roller is connected with a planetary gear 51 meshing with the large gear ring 111 , and the rotating frame 12 and the rotary driving device 10 are driven by a gear 101 .

[0042] The mahjong cleaning machine further comprises a hot air device 61 and a germicidal lamp 62 facing the accommodating chamber 100. The germicidal lamp 62 is arranged on the inner surface of the housing 2.

[0043] The frame 11 is slidably connected with a dirt collection drawer 63 for receiving dirt located below the rotating frame 12. A cleaning agent spraying device for spraying cleaning agent toward the accommodating chamber 100 is also included.

[0044] The brush roller 13 includes a roller body 140. A plurality of first brush belts are provided on the surface of the roller body 140. The first brush belt includes a plurality of first brush groups arranged on the surface of the roller body 140. Each first brush group includes two first brush heads 131. There is a flipping recess 13a between the first brush belt and the adjacent first brush belt for accommodating a part of the mahjong tiles. The first brush belt is used to rotate and squeeze the mahjong tiles to move along the rotation direction of the roller body 140, causing the mahjong tiles to flip during cleaning. A cleaning roller of a mahjong tile cleaning machine includes a roller body 140. A plurality of first brush belts are provided on the surface of the roller body 140. The first brush belt includes a plurality of first brush heads 131 arranged on the surface of the roller body 140. There is a spiral flipping recess 13a for accommodating a part of the mahjong tiles between the first brush belt and the adjacent first brush belt. The first brush belt is used to rotate and squeeze the mahjong tiles to move along the rotation direction of the roller body 140 and the rotation axis direction of the roller body 140, causing the mahjong tiles to flip during cleaning. The first brush belt is also used to squeeze the mahjong tiles to move towards the discharging direction when rotating in the second direction opposite to the first direction. A second brush belt is provided in the flipping groove. The second brush belt includes a plurality of second brush heads 132 with a height shorter than that of the first brush heads 131. The width of the flipping recess 13a is 10 mm - 16 mm.

[0045] The bristle diameter of the first brush head 131 and / or the second brush head 132 is 0.2 mm - 0.3 mm. The spiral angle of the flipping recess 13a is 6° - 14°. The height of the first brush head 131 protruding from the roller body 140 is 8 mm - 12 mm, and the height of the second brush head 132 protruding from the roller body 140 is 2 - 8 mm. Moreover, the first brush head 131 is 3 mm - 7 mm higher than the second brush head 132. The bristles are made of nylon.

[0046] The first brush head 131 and / or the second brush head 132 is a cylindrical brush head with a diameter of 3.5 mm - 6.5 mm. Plug connectors connected to the rotating shaft 53 of the mahjong tile cleaning machine are provided at both ends of the roller body 140.

[0047] The present invention also provides a cleaning method for the above-mentioned mahjong tile cleaning machine, including: putting a plurality of mahjong tiles into the feeding port 100a; controlling the rotation driving device 10 to rotate forward, and the first brush belt squeezing the mahjong tiles to flip towards the discharging port 100b; controlling the cleaning agent nozzle 646464 to spray the cleaning agent; turning on the hot air device 61 and the sterilization lamp 62; completing the cleaning; turning off the hot air device 61 and the sterilization lamp 62, and controlling the cover opening driving device 42 to open the discharging cover 41; controlling the rotation driving device 10 to rotate in the reverse direction, and the first brush belt squeezing the mahjong tiles to flip away from the discharging port 100b.

[0048] The present invention provides a feeding device 3 for a mahjong cleaning machine. The mahjong cleaning machine has a frame 11 and a receiving cavity 100. The feeding device 3 includes a hopper 31 extending towards the feeding port 100a of the front cover 113 fixed to the frame 11 and facing the receiving cavity 100. The hopper 31 is connected with a tipping plate 32. The tipping plate 32 can move from a closed position covering the feeding port 100a to a receiving position away from the feeding port 100a and abutting against the mahjong table. The tipping plate 32 includes a vertical plate 321 and a horizontal plate 322. The horizontal plate 322 is used to cross over the border of the mahjong table and abut against the tabletop of the mahjong table. After the horizontal plate 322 abuts against the tabletop, the user slides the mahjong into the feeding port 100a through the horizontal plate 322, without having to pick up the mahjong and put it into the feeding port 100a as in the prior art.

[0049] The hopper 31 includes a slope 311 extending upward from the lower part of the feeding port 100a and away from the frame 11, and a side plate 312 for connecting the slope 311 and the frame 11.

[0050] The side plate 312 is provided with a vertical upward vertical track 320 and a horizontal track 320' extending away from the frame 11 from the middle of the vertical track 320. The upper part of the tipping plate 32 is provided with a first slider 32a slidably engaged with the vertical track 320, and the lower part of the tipping plate 32 is provided with a second slider 32b slidably engaged with the horizontal track 320'.

[0051] The two sides of the tipping plate 32 are provided with upward extending baffles 323.

[0052] When both the first slider 32a and the second slider 32b are slidably engaged with the vertical track 320, the tipping plate 32 can only move up and down.

[0053] When the second slider 32b corresponds to the position of the horizontal track 320', the first slider 32a disengages from the vertical track 320, and the tipping plate 32 can rotate.

[0054] The first slider 32a is in a plate-like structure.

[0055] Both the vertical track 320 and the horizontal track 320' are in a groove structure.

[0056] The second slider 32b is circular.

[0057] The hopper 31 and / or the tipping plate 32 is made of metal or plastic. The slope 311 is provided with a plurality of ventilation holes, and a hot air device 61 is fixed to the side of the slope 311 facing away from the receiving cavity 100.

[0058] The present invention provides a discharging device 4 for a mahjong cleaning machine, which includes a discharging cover 41 and an opening driving device 42 for driving the discharging cover 41 to open. The discharging cover 41 is rotatably connected to the machine frame 11. On one side of the discharging cover 41 facing away from the rotation connection portion 411, there is an iron body 44 that can be attracted by an electromagnet 43, and the machine frame 11 is provided with an electromagnet 43 corresponding to the iron body 44. In this application, the mutually attracting electromagnet 43 and iron body 44 are provided, so that the discharging cover 41 will not be squeezed open by mahjong when the discharging cover 41 is closed.

[0059] The rear cover 114 of the machine frame 11 is provided with a proximity switch 46 for detecting whether the discharging cover 41 is closed.

[0060] It further includes a controller electrically connected to the electromagnet 43 and the proximity switch 46. In this way, the controller can control the electromagnet 43 to attract the iron body 44 after the proximity switch 46 detects that the discharging cover 41 is closed.

[0061] The discharging cover 41 is provided with an iron body accommodating portion 410 for accommodating the iron body 44, and the rear cover 114 of the machine frame 11 is provided with an electromagnet accommodating portion for accommodating the electromagnet 43.

[0062] The inner surface of the discharging cover 41 is provided with a cleaning agent spray head 64.

[0063] The cleaning agent spray head 64 is connected to a pump 65 fixed on the machine frame 11 through a pipeline.

[0064] The inner surface of the discharging cover 41 extends towards the inside of the machine frame 11 with a plug. The plug is used to block the material guiding pipe 1211 of the mahjong cleaning machine. The surface of the plug facing the inside of the machine frame 11 is provided with a plurality of third brush heads 45. The third brush heads 45 are connected and fixed to the plug through magic stickers. The third brush heads 45 can play a role in cleaning mahjong, and can also reduce the noise and vibration generated by mahjong colliding with the plug.

[0065] The discharging cover 41 includes an inner shell and a cover plate fixed to each other by screws, and the discharging cover 41 is a hollow structure.

[0066] The rotation connection portion 411 is a hollow structure.

[0067] The pipeline passes through the rotation connection portion 411 and is connected to the cleaning agent spray head 64. The cleaning agent spraying device includes a cleaning agent spray head 64, a pump 65, and a cleaning agent container 66.

[0068] The present invention provides a transmission structure of a rotating frame with inlet and outlet openings on its end face, including turntables 121 provided at both ends of the rotating frame 12, and a plurality of planet gears 51 provided on the turntables 121 and meshing with a large gear ring 52. Feed openings 100a and discharge openings 100b are respectively formed in the turntables 121 at both ends of the rotating frame 12. The turntable 121 is provided with a transmission ring 52 on one side of the planet gear 51, and the turntable 121 is provided with a material guiding pipe 1211 extending towards the center of the rotating frame 12. In this application, the feed opening 100a is arranged in the middle of the turntable 121, and the material guiding pipe 1211 is arranged to prevent the material flow from falling into the gap between the planet gear 51 and the rotating disk 121.

[0069] The outer peripheral surface of the transmission ring 52 has transmission teeth.

[0070] In other embodiments, the outer peripheral surface of the transmission ring 52 has grooves for cooperating with a belt for transmission, and the rotating frame 12 and the rotary drive device 10 are driven by a belt.

[0071] The turntable 121 at the rear end of the rotating frame 12 is rotatably connected with a planet gear 51, the turntable 121 at the rear end of the rotating frame is rotatably connected with a rotating shaft 53 without a planet gear, and the planet gear 51 is connected with a rotating shaft 53 rotatably connected with the turntable 121.

[0072] A bearing 54 is provided between the rotating shaft 53 and the turntable 121.

[0073] The rotating shaft 53 passes through the turntable 121 and is connected with a socket 55 for connecting a cleaning roller.

[0074] The material guiding pipe 1211 extends in a direction away from the planet gear 51 with a falling prevention pipe section 1211a, and the falling prevention pipe section 1211a is used to prevent mahjong from falling into the gap between the cleaning roller and the turntable 121.

[0075] The large gear ring 111 is provided with connection holes for connecting and fixing with the frame 11.

[0076] The transmission ring 52 and the turntable 121 are fixedly connected by screws.

[0077] The planet gear 51, the large gear ring 111, the turntable 121, and the transmission ring 52 are made of metal or plastic.

[0078] A connection structure of a cleaning roller includes a roller body 140, a socket 55, plugs 143 that can be inserted into the socket 55 are provided at both ends of the roller body 140, the socket 55 is connected with a rotating shaft 53, a connection sleeve 56 is slidably connected to the socket 55, the connection sleeve 56 can move from a socket position accommodating the plug 143 to a disengaged position disengaging from the plug 143, and a compression spring 5t for keeping the connection sleeve 56 in the socket position is provided between the connection sleeve 56 and the socket 55.

[0079] The cross-section of the socket 55 is U-shaped, and the socket 55 has a removal notch. The connection sleeve 56 is provided with an operation protrusion 561. It further includes a guide tube 57 fixedly connected to the rotating shaft 53. The guide tube 57 is provided with a guide protrusion 571 that cooperates with the connection sleeve 56. The connection sleeve 56 is provided with a guide groove 562 that cooperates with the guide protrusion 571. The operation protrusion 561 corresponds to the position of the removal notch. The connection sleeve 56 can be accommodated in the guide tube 57. One end of the guide groove 562 close to the rotating shaft 53 is provided with an anti-falling protrusion 563. The guide protrusion 571 is located at one end of the guide tube 57 close to the roller body 140. The anti-falling protrusion 563 and the guide protrusion 571 are respectively provided with installation guiding inclined surfaces.

[0080] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cleaning roller of a mahjong cleaning machine, comprising a roller body, characterized in that: The surface of the roller body is provided with a plurality of first brush belts, which include a plurality of first brush heads arranged on the surface of the roller body. A spiral flipping recess capable of accommodating part of mahjong is provided between the first brush belts and adjacent first brush belts. The first brush belt is used for rotating and squeezing the mahjong to move along the rotation direction of the roller body and the rotation axis direction of the roller body so that the mahjong can be flipped during cleaning.

2. The cleaning roller of the mahjong cleaning machine according to claim 1, characterized in that: The first brush belt is also used for squeezing the mahjong to move toward a discharging direction when rotating in a second direction opposite to the first direction.

3. The cleaning roller of the mahjong cleaning machine according to claim 2, characterized in that: A second brush belt is arranged in the flip recess, and the second brush belt includes a plurality of second brush heads whose height is shorter than that of the first brush heads.

4. The cleaning roller of the mahjong cleaning machine according to claim 1, characterized in that: The width of the flipping depression is 10 mm to 16 mm.

5. The cleaning roller of the mahjong cleaning machine according to claim 1, characterized in that: The bristle diameter of the first brush head and / or the second brush head is 0.2mm-0.3mm.

6. The cleaning roller of the mahjong cleaning machine according to claim 1, characterized in that: The helix angle of the flip depression is 6°-14°.

7. The cleaning roller of the mahjong cleaning machine according to claim 3, characterized in that: The height of the first brush head protruding from the roller body is 8mm-12mm, the height of the second brush head protruding from the roller body is 2-8mm, and the first brush head is 3mm-7mm higher than the second brush head.

8. The cleaning roller of the mahjong cleaning machine according to claim 5, characterized in that: The bristles are made of nylon.

9. The cleaning roller of the mahjong cleaning machine according to claim 1, characterized in that: The first brush head and / or the second brush head is a cylindrical brush head with a diameter of 3.5 mm-6.5 mm.

10. The cleaning roller of the mahjong cleaning machine according to claim 1, characterized in that: Both ends of the roller body are provided with plugs connected with the rotating shaft of the mahjong cleaning machine.

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