Mahjong cleaning device for mahjong machine

Abstract

This utility model discloses a mahjong tile cleaning device for a mahjong machine, including a base. A parallel-axis interlaced chain drive with equidistant paddles is mounted above the base. A guide rail is mounted on the parallel-axis interlaced chain drive. A magnetic tile-flipping controller, a first cleaning device, and a second cleaning device are sequentially arranged on the guide rail. The guide rail includes a transmission rail and a tile-turning rail located between the first and second cleaning devices. The tile-turning rail includes a gradually changing guide section and a transition straight section, with an L-shaped bend on the opposite side of the connection point to accommodate the mahjong tiles. When the mahjong tiles pass through the first cleaning device, the front, back, and two sides are cleaned simultaneously. When the mahjong tiles enter the tile-turning rail, they undergo a 90° turn. They then enter the second cleaning device, where the front, back, and the remaining two sides are cleaned simultaneously, achieving comprehensive cleaning of all exposed surfaces. Furthermore, the magnetic tile-flipping controller prevents the mahjong tiles from clustering together.

Description

Technical Field

[0001] This utility model belongs to the field of mahjong tile cleaning technology, specifically relating to a mahjong tile cleaning device for mahjong machines. Background Technology

[0002] Mahjong, as a popular recreational activity, brings joy to people, but its hygiene and cleanliness are often overlooked. During use, mahjong tiles accumulate a large amount of dust, sweat, bacteria, and other contaminants on their surface. This contamination is even more severe in crowded environments like mahjong parlors.

[0003] However, current methods of cleaning mahjong tiles have many shortcomings. Traditional manual cleaning requires a large amount of manpower, is inefficient, and yields inconsistent results from different personnel. It also struggles to thoroughly remove dirt adhering to the surface and crevices of the tiles, resulting in inconsistent cleaning effectiveness and failing to meet ideal hygiene standards. Furthermore, existing mahjong tile cleaning machinery also has deficiencies. While some machines attempt to clean using brush rollers, they cannot guarantee thorough cleaning of all six sides of the tiles, easily leaving cleaning blind spots. Moreover, the machines are prone to accumulating tiles during cleaning, leading to malfunctions such as machine jamming. All these issues severely impact the cleaning effect and efficiency, failing to meet the actual needs of mahjong tile cleaning. Utility Model Content

[0004] This utility model aims to provide a mahjong tile cleaning device for mahjong machines, which can wipe and clean all six surfaces of each mahjong tile in sequence, and avoid the phenomenon of mahjong tiles piling up, thereby solving the problems of incomplete cleaning and easy machine jamming in existing mahjong tile cleaning methods.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mahjong tile cleaning device for a mahjong machine includes a base, a parallel-axis interlaced chain drive with equidistant paddles mounted above the base, a guide rail mounted on the parallel-axis interlaced chain drive, and elongated paddle slots adapted to the paddles on the guide rail. As the paddles circulate with the parallel-axis interlaced chain drive, they smoothly push the mahjong tiles forward along the paddle slots. The guide rail is arranged in a production line with a magnetic tile flipper for adsorbing mahjong tiles with characters on one side, a first cleaning device, and a second cleaning device. The first and second cleaning devices have identical structures and their inner walls are lined with high-density nano-sponge. The guide rail includes a tile-turning track and a transmission track. The tile-turning track is located between the first and second cleaning devices, and the transmission track connects to the remaining portion outside the area between the first and second cleaning devices. The tile-turning track includes a gradient guide section and a transition straight section. An L-shaped bend for accommodating mahjong tiles is provided on the opposite side of the junction of the gradient guide section and the transition straight section. The track has elongated slots for the paddles to pass through at positions corresponding to the two chains of the parallel-axis intersecting chain drive. The mahjong tiles are precisely selected by a magnetic flipper, which picks up one tile per rotation and flips it so the tile is facing up. The tile then falls onto the transport track under its own weight and the push of the paddles from the parallel-axis intersecting chain drive. As the mahjong tile passes through the first cleaning device, it undergoes simultaneous cleaning of all four sides: front, back, and two sides. Upon entering the turning track, the tiles first pass through a gradual guide section. At the junction of the gradual guide section and the transition straight section, guided by the side wall of the track and propelled by the levers of the first chain, the direction of travel gradually changes, entering the L-shaped curve. Then, propelled by levers on another chain arranged in parallel and staggered positions, the mahjong tiles complete a 90° turn along the L-shaped curve with their center as the axis. Afterward, they pass through the transition straight section and enter the second cleaning device, where the front, back, and the remaining two sides are cleaned simultaneously, achieving comprehensive cleaning of all exposed surfaces.

[0007] Furthermore, a dual-axis motor is installed at the center of the base to provide power to the parallel-axis interlaced chain drive device. The two output main shafts and the output secondary shaft of the dual-axis motor are located at the same end of the motor and are on the same horizontal line. The parallel-axis interlaced chain drive device includes drive shafts connected to the output main shaft and the output secondary shaft respectively. The drive shafts are fixed to the frame mounted on the base by bearing seats. Both drive shafts are equipped with drive sprockets, and each drive sprocket meshes with a conveyor chain with paddles. The two conveyor chains are arranged in parallel and staggered configurations on the parallel drive shafts. A guide support plate is provided below the conveyor chain; two conveyor chains pass around their respective driving sprockets and extend in opposite directions to their respective driven ends via the guide support plate. One conveyor chain extends towards the magnetic card flipper, and the other conveyor chain extends towards the second cleaning device. A frame is provided on the base at the corresponding position of the magnetic card flipper and the second cleaning device. A driven shaft with a driven sprocket is installed on the frame via a bearing seat. The two conveyor chains mesh with the driven sprockets to form two synchronously running closed transmission circuits.

[0008] Furthermore, the magnetic card flipping controller includes a card-attracting wheel, which is a partially cylindrical structure formed by cutting along the axial direction. A permanent magnet is set on the cutting plane of the card-attracting wheel. The magnetic poles of the permanent magnet are opposite to the magnetic poles of the magnets inside the mahjong tiles. The card-attracting wheel attracts one mahjong tile for each rotation. When the cutting plane of the card-attracting wheel reaches the bottom, the mahjong tile flips to face up. Under its own weight and the push of the paddle of the parallel axis intersecting chain transmission device, the mahjong tile falls onto the transmission track, thereby realizing the functions of controlling the feeding of tiles and automatic flipping.

[0009] Furthermore, the magnetic card flipper also includes a double gear and a driven gear fixed on the rotating shaft of the card-collecting wheel. Two driven sprockets are mounted side by side on the driven shaft near the magnetic card flipper. One driven sprocket meshes with the corresponding conveyor chain to maintain a closed transmission circuit. The other driven sprocket meshes with one end of the double gear to transmit power to the double gear. The other end of the double gear extends out of the frame and is connected to the driven gear of the card flipper through a synchronous chain. When the conveyor chain runs and drives the driven shaft to rotate, the power is transmitted step by step through the driven sprocket, the double gear, the synchronous chain, and the driven gear of the card flipper, ultimately driving the card-collecting wheel to rotate.

[0010] Furthermore, the first cleaning device includes a cleaning housing mounted on a guide rail, and a removable and cleanable cleaning box is provided inside the cleaning housing. Both the cleaning housing and the removable and cleanable cleaning box have clearance grooves at their bottoms that correspond to the paddle slots. Floating cleaning sliders are connected to the two side walls of the removable and cleanable cleaning box by floating slider springs. Each floating cleaning slider has a three-sided high-density nano sponge connected to its inner side. The top outer side of the three-sided high-density nano sponge is provided with a spring piece, which can automatically adjust the adhesion according to the height of the mahjong tile.

[0011] Furthermore, the cleaning housing is provided with a liquid injection hole, and a cleaning liquid storage box is provided on the base. The cleaning liquid storage box is connected to the liquid injection holes of the first cleaning device and the second cleaning device through pipelines to form a liquid supply channel, so as to accurately spray the cleaning liquid onto the three-sided high-density nano sponge inside the cleaning device.

[0012] Furthermore, a nano-brush roller with a 45-degree angle to the track is provided on the gradient guide section of the tile-turning track. The brush filaments of the nano-brush roller adhere to the complex groove structure of the characters on the surface of the mahjong tile, thereby removing accumulated dust, oil, and residue.

[0013] Furthermore, a drying fan and an ultraviolet disinfection lamp are installed on the transmission track downstream of the second cleaning device. After the mahjong tiles are cleaned, the drying fan first blows out clean air to quickly remove surface moisture; then, during the journey, they pass through the irradiation area of ​​the ultraviolet disinfection lamp to achieve efficient inactivation of surface microorganisms, completing the integrated "cleaning-drying-disinfection" process.

[0014] Furthermore, the first cleaning device is provided with an inclined fixed section sliding tile groove. The angle between the inclined fixed section sliding tile groove and the horizontal plane is 25 degrees. One end of the inclined fixed section sliding tile groove serves as the feeding end, which is used to receive and convey the mahjong tiles arranged face down by the mahjong machine into the cleaning machine. The other end extends to the magnetic tile flipper to control the feeding of tiles.

[0015] Furthermore, the card-switching track adopts a split structure that is symmetrically divided along the longitudinal centerline. A strip-shaped limiting groove is integrally formed on the outer side of the L-shaped bend. By limiting the screws at different positions in the strip-shaped limiting groove, the width of the card-switching track can be adjusted to accommodate mahjong tiles of different sizes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention utilizes a parallel-axis interlaced chain drive and guide rail to install a magnetic card-flipping controller, a first cleaning device, and a second cleaning device. This allows for controlled card feeding and automatic flipping, sequentially cleaning all six surfaces of each mahjong tile. The magnetic card-flipping controller combines flipping and control; the magnetic poles of the permanent magnet in the card-suction wheel are opposite to the magnetic poles of the mahjong tile's built-in magnet. Simultaneously, the magnetic difference between the front and back of the tile allows for precise selection of tiles with characters on the inscribed side through the strong magnetic attraction of the suction wheel. The first and second cleaning devices, with identical structures, clean the mahjong tiles. When the mahjong tile passes through the first cleaning device, all four surfaces (front, back, and two sides) are cleaned simultaneously. A tile-turning track is installed in both the first and second cleaning devices. The track includes a gradient guide section and a straight transition section. An L-shaped curve for accommodating mahjong tiles is located on the opposite side of the junction of the gradient guide section and the straight transition section. Long, narrow slots for paddles are provided on the track at positions corresponding to the two chains of the parallel-axis intersecting chain drive. When a mahjong tile enters the track, it first passes through the gradient guide section. Upon reaching the junction of the gradient guide section and the straight transition section, guided by the track sidewall and propelled by the paddles on the first chain, its direction of travel gradually changes, entering the L-shaped curve. Then, pushed by paddles on another parallel, staggered chain, the mahjong tile completes a 90° turn around its center along the L-shaped curve. The turned mahjong tile then enters the second cleaning device, where the front, back, and the remaining two sides are cleaned simultaneously, achieving comprehensive cleaning of all exposed surfaces.

[0018] Furthermore, this invention connects the two main output shafts and the secondary output shaft of a dual-axis motor to drive shafts. Each drive shaft is equipped with a drive sprocket, and each drive sprocket engages a conveyor chain with paddles. The two conveyor chains are arranged in parallel, staggered configurations on the parallel drive shafts. Each conveyor chain bypasses its respective drive sprocket and extends in opposite directions to its driven end via a guide support plate. One conveyor chain extends towards the magnetic card flipper, while the other extends towards the second cleaning device. The two conveyor chains engage with the driven sprockets to form two synchronously operating closed transmission loops. The conveyor chains rotate synchronously with the drive sprockets, and the paddles on them move cyclically with the conveyor chains, thus pushing the mahjong tiles. Furthermore, two driven sprockets are installed side-by-side on the driven shaft near the magnetic card flipper. One driven sprocket meshes with the corresponding conveyor chain to maintain a closed transmission circuit; the other driven sprocket meshes with the double-gear end gear of the magnetic card flipper, and is connected to the driven gear of the card controller fixed on the rotating shaft of the card suction wheel via a synchronous connection. When the conveyor chain rotates, driving the driven shaft to rotate, the power is transmitted step by step through the driven sprocket, double gear, synchronous chain, and driven gear of the card controller, ultimately driving the card suction wheel to rotate. This multi-purpose use of the conveyor system's power source, synchronously driving the card suction wheel through a mechanical transmission chain, achieves "conveyance + card flipping + card control," improving system integration and operational synchronization.

[0019] Furthermore, this invention also uses a nano-brush roller to penetrate the complex groove structure of the characters on the surface of the mahjong tile to remove accumulated dust, oil, and residue. The cleaned mahjong tile is then dried and sterilized using a drying fan and an ultraviolet disinfection lamp, achieving an integrated "cleaning-drying-disinfection" process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the transmission device structure of this utility model;

[0022] Figure 3 This is a top view of the transmission device of this utility model;

[0023] Figure 4 This is a schematic diagram of the guide rail structure of this utility model;

[0024] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 6 This is a schematic diagram of the magnetic card flipping and control device of this utility model;

[0026] Figure 7This is a schematic diagram of the removable and cleanable box structure of this utility model.

[0027] In the diagram: 1-Base; 2-Parallel shaft interlaced chain drive device; 21-Drive shaft; 22-Drive sprocket; 23-Pulley; 24-Conveyor chain; 25-Guide support plate; 26-Driven shaft; 27-Driven sprocket; 3-Guide rail; 31-Tile turning rail; 311-Strip limit slot; 32-Transmission rail; 33-Pulley slot; 4-Magnetic card flipper; 41-Card suction wheel; 42-Permanent magnet; 43-Double gear; 44-Driven gear of card flipper; 5-First cleaning device 51-Cleaning outer shell; 52-Removable and cleanable cleaning box; 53-Floating cleaning slider; 54-Floating slider spring; 55-Three-sided high-density nano sponge; 56-Injection hole; 57-Allowing groove; 6-Second cleaning device; 7-Inclined fixed section sliding tile groove; 8-Nano brush roller; 81-Brush motor; 9-Cleaning liquid storage box; 10-Dual-axis motor; 101-Output main shaft; 102-Output secondary shaft; 11-Mahjong tile; 12-Drying fan; 13-Ultraviolet disinfection lamp. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , 2As shown in Figures 3 and 4, the mahjong tile cleaning device for a mahjong machine described in this embodiment includes a base 1. A parallel-axis interlaced chain transmission device 2 with equidistant paddles 23 is arranged above the base 1. A guide rail 3 is mounted on the parallel-axis interlaced chain transmission device 2. An elongated paddle groove 33 adapted to the paddles 23 is opened on the guide rail 3. The groove extends along the length of the rail, through which the paddles 23 of the parallel-axis interlaced chain transmission device 2 pass and are embedded. This allows the paddles 23 to smoothly push the mahjong tiles 11 on the rail forward along the paddle groove 33 when the parallel-axis interlaced chain transmission device 2 circulates, while avoiding interference between the paddles 23 and the rail. On the guide rail 3, in a production line arrangement, are a magnetic flipper 4 for adsorbing mahjong tiles 11 with characters on one side, a first cleaning device 5, and a second cleaning device 6. The first cleaning device 5 and the second cleaning device 6 have the same structure and are equipped with cleaning sponges on their inner walls. Downstream of the second cleaning device 6, on the conveyor rail 32, are a drying fan 12 and an ultraviolet disinfection lamp 13. After cleaning, the mahjong tiles 11 are first blown out by the drying fan 12 to quickly remove surface moisture. Then, during their movement, they pass through the irradiation area of ​​the ultraviolet disinfection lamp 13, achieving efficient inactivation of surface microorganisms. The two work together to complete the integrated "cleaning-drying-disinfection" process. The first cleaning device 5 is equipped with an inclined fixed section sliding trough 7. The inclined fixed section sliding trough 7 has an angle of 25 degrees with the horizontal plane. One end of the inclined fixed section sliding trough 7 serves as the feeding end, used to receive and convey the mahjong tiles 11 arranged face down by the mahjong machine into the cleaning machine. The other end extends to the magnetic flipper 4 to control the feeding of the tiles.

[0030] like Figure 4 , 5As shown, the guide track 3 includes a card-turning track 31 and a transmission track 32. The card-turning track 31 is located between the first cleaning device 5 and the second cleaning device 6, while the transmission track 32 is connected to the remaining part outside the interval between the first cleaning device 5 and the second cleaning device 6. The turning track 31 includes a gradual guide section and a transition straight section. An L-shaped curve for accommodating the mahjong tile 11 is provided on the opposite side of the junction of the gradual guide section and the transition straight section. The turning track 31 also has elongated slots 33 for the paddles 23 to pass through at positions corresponding to the two chains of the parallel-axis intersecting chain drive device 2. When the mahjong tile 11 enters the turning track 31, it first passes through the gradual guide section. Upon entering the junction of the gradual guide section and the transition straight section, it gradually changes its direction of travel and enters the L-shaped curve under the guidance of the track sidewall and the push of the paddles 23 on the first chain. Since the L-shaped curve is located on the opposite side of the junction area, it forms a localized cavity structure that can temporarily accommodate the mahjong tile 11. Then, it is pushed by the paddles 23 on another parallel, staggered chain, causing the mahjong tile 11 to complete a 90° turn along the L-shaped curve trajectory with its center as the axis. Subsequently, it enters the transition straight section, achieving stable correction of its running posture. When the mahjong tile 11 passes through the first cleaning device 5, it undergoes simultaneous cleaning of all four surfaces: the front, back, and two sides. A nano-brush roller 8, at a 45-degree angle to the track, is installed on the gradient guide section of the tile-turning track 31. The bristles of the nano-brush roller 8 effectively penetrate the grooves in different directions of the characters on the surface of the mahjong tile 11, removing accumulated dust, oil, and residue. Driven by a brush motor 81, the nano-brush roller 8's rotation speed can be precisely controlled according to the conveying speed of the mahjong tile 11 (usually matching the track's transmission rate), ensuring that the grooves on the surface of each tile are thoroughly cleaned. After rotating 90 degrees on the tile-turning track 31, the mahjong tile 11 enters the second cleaning device 6, where the front, back, and the remaining two sides are cleaned simultaneously, achieving comprehensive cleaning of all exposed surfaces.

[0031] like Figure 5 As shown, the card-turning track 31 adopts a split structure that is symmetrically divided along the longitudinal centerline. A strip-shaped limiting groove 311 is integrally formed on the outer side of the L-shaped curve. By limiting the screws in different positions of the strip-shaped limiting groove 311, the width of the card-turning track 31 can be adjusted to accommodate mahjong tiles 11 of different sizes.

[0032] like Figure 6As shown, the magnetic card flipper 4 includes a card-attracting wheel 41, which is a partially cylindrical structure cut along the axial direction. A permanent magnet 42 is positioned on the cut surface of the card-attracting wheel 41. The magnetic poles of the permanent magnet 42 are opposite to the magnetic poles of the magnets inside the mahjong tiles 11. Utilizing the magnetic difference between the front and back sides of the tiles, the strong magnetic attraction of the card-attracting wheel 41 enables precise selection of the mahjong tiles 11 with the characters on the front side. Each rotation of the card-attracting wheel 41 attracts one mahjong tile 11. When the cut surface of the card-attracting wheel 41 reaches the bottom, the mahjong tile 11 flips to face up. Under its own weight and the push of the paddle 23 of the parallel-axis intersecting chain drive device 2, the mahjong tile 11 falls onto the transmission track 32, thus achieving the functions of controlling tile feeding and automatic flipping. Driven by the paddle 23 of the parallel-axis intersecting chain drive device 2, it is then conveyed forward along the transmission track 32 and enters the first cleaning device 5 for cleaning.

[0033] like Figure 7 As shown, the first cleaning device 5 includes a cleaning housing 51 mounted on a guide rail 3. A removable, cleanable cleaning box 52 is installed inside the cleaning housing 51. Both the cleaning housing 51 and the removable, cleanable cleaning box 52 have clearance grooves 57 at their bottoms corresponding to the paddle groove 33. Floating cleaning sliders 53 are connected to the side walls of the removable, cleanable cleaning box 52 via floating slider springs 54. Each floating cleaning slider 53 has a three-sided high-density nano-sponge 55 attached to its inner side. A spring is located at the center of the outer side of the top of the three-sided high-density nano-sponge 55, which can automatically adjust the adhesion according to the height of the mahjong tile 11. The cleaning housing 51 has an injection hole 56, such as... Figure 1 As shown, a cleaning fluid storage box 9 is set on the base 1. The cleaning fluid storage box 9 is connected to the injection holes 56 of the first cleaning device 5 and the second cleaning device 6 through pipelines to form a liquid supply channel, so as to accurately spray the cleaning fluid onto the three-sided high-density nano sponge 55 in the cleaning device, ensuring that the sponge always keeps moderately moist to efficiently clean the mahjong tiles 11.

[0034] like Figure 2 , 3As shown, a dual-axis motor 10, which provides power to the parallel-axis interlaced chain drive device 2, is located at the center of the base 1. The two output main shafts 101 and the output secondary shaft 102 of the dual-axis motor 10 are located at the same end of the motor and are on the same horizontal line. The parallel-axis interlaced chain drive device 2 includes drive shafts 21 connected to the output main shafts 101 and the output secondary shafts 102 respectively. The drive shafts 21 are fixed to the frame mounted on the base 1 by bearing seats. Both drive shafts 21 are equipped with drive sprockets 22, and each drive sprocket 22 is engaged with a conveyor chain 24 with a paddle 23. The two conveyor chains 24 are arranged in parallel and staggered on the parallel drive shafts 21. A guide support plate 25 is provided below the conveyor chains 24 to support the operation of the conveyor chains 24 and reduce sagging deformation. Two conveyor chains 24 pass around their respective drive sprockets 22 and extend in opposite directions to their respective driven ends via guide support plates 25. One conveyor chain 24 extends towards the magnetic card flipper 4, while the other extends towards the second cleaning device 6. Frames are respectively installed on the bases 1 at the corresponding positions of the magnetic card flipper 4 and the second cleaning device 6. Driven shafts 26 with driven sprockets 27 are mounted on the frames via bearing seats. The two conveyor chains 24 mesh with the driven sprockets 27 to form two synchronously operating closed transmission loops. The conveyor chains 24 move synchronously with the rotation of the drive sprockets 22, and the paddles 23 on them move cyclically with the conveyor chains 24, realizing the pushing action of the mahjong tiles 11.

[0035] The magnetic card flipper 4 also includes a double gear 43 and a driven gear 44. Two driven sprockets 27 are mounted side-by-side on the driven shaft 26 near the magnetic card flipper 4. One driven sprocket 27 meshes with the corresponding conveyor chain 24 to maintain a closed transmission circuit; the other driven sprocket 27 meshes with one end of the double gear 43 to transmit power to the double gear 43. The other end of the double gear 43 extends outside the frame and is connected to the driven gear 44 via a synchronous chain. The driven gear 44 is fixed to the rotating shaft of the card suction wheel 41. When the conveyor chain 24 rotates, driving the driven shaft 26 to rotate, power is transmitted step by step through the driven sprocket 27, the double gear 43, the synchronous chain, and the driven gear 44, ultimately driving the card suction wheel 41 to rotate, thus achieving the adsorption, flipping, and orderly release of the mahjong tiles 11, completing the "card flipping + card control" function.

[0036] Working principle: The mahjong tiles 11 to be cleaned enter the cleaning machine through the inclined fixed section sliding groove 11. The strong magnetic attraction of the suction wheel 41 enables precise selection of the mahjong tiles 11 with characters on the side. Each rotation of the suction wheel 41 attracts one mahjong tile 11. When the cutting plane of the suction wheel 41 reaches the bottom, the mahjong tile 11 flips over so that the characters are facing up. Under its own weight and the push of the paddle 23 of the parallel shaft intersecting chain transmission device 2, the mahjong tile 11 falls onto the transmission track 32, thus realizing the functions of controlling the entry of tiles and automatic flipping. Under the push of the paddle 23 of the parallel shaft intersecting chain transmission device 2, it is conveyed forward along the transmission track 32 and enters the first cleaning device 5 for cleaning.

[0037] When the mahjong tile 11 passes through the first cleaning device 5, it undergoes simultaneous cleaning of all four surfaces: the front, back, and two sides. As it passes through the gradually changing guide section of the tile-turning track 31, the brush bristles of the nano-brush roller 8 adhere to the complex groove structure of the characters on the surface of the mahjong tile 11, removing accumulated dust, oil, and residue. Then, guided by the track sidewalls and pushed by the levers 23 of the first conveyor chain 12, the mahjong tile 11 gradually changes its direction of travel and enters an L-shaped curve. Pushed by levers 23 on another parallel, staggered conveyor chain 22, the mahjong tile 11 completes a 90° turn along the L-shaped curve with its center as the axis. It then enters a transition straight section for stable correction of its running posture. After rotating 90 degrees through the tile-turning track 31, the mahjong tile 11 enters the second cleaning device 6, where the front, back, and the remaining two sides are cleaned simultaneously, achieving comprehensive cleaning of all exposed surfaces.

[0038] After being cleaned, the mahjong tiles 11 are first blown out by the drying fan 12 to quickly remove surface moisture; then, during their movement, they pass through the irradiation area of ​​the ultraviolet disinfection lamp 13 to achieve efficient inactivation of surface microorganisms. The two work together to complete the integrated "cleaning-drying-disinfection" process.

Claims

1. A mahjong cleaning device for a mahjong machine, characterized by, Includes a base (1), and a parallel shaft interlaced chain drive device (2) with equidistant paddles (23) is provided above the base (1). A guide rail (3) is mounted on the parallel shaft interlaced chain drive device (2). A long strip-shaped paddle groove (33) adapted to the paddle (23) is opened on the guide rail (3). When the paddle (23) moves in a cycle with the parallel shaft interlaced chain drive device (2), it smoothly pushes the mahjong tiles (11) on the track forward along the paddle groove (33). The guide rail (3) is arranged in sequence with a magnetic flipping controller (4), a first cleaning device (5), and a second cleaning device (6) for adsorbing mahjong tiles (11) with characters on one side. The first cleaning device (5) and the second cleaning device (6) have the same structure and are provided with high-density nano sponges on the inner walls around them. The guide track (3) includes a card-turning track (31) and a transmission track (32). The card-turning track (31) is located between the first cleaning device (5) and the second cleaning device (6), and the transmission track (32) is connected to the remaining part outside the interval between the first cleaning device (5) and the second cleaning device (6). The card-turning track (31) includes a gradual guide section and a transition straight section. An L-shaped curve for accommodating mahjong tiles (11) is provided on the opposite side of the junction of the gradual guide section and the transition straight section. The card-turning track (31) has a long strip-shaped paddle slot (33) for the paddle (23) to pass through at the position corresponding to the two chains of the parallel shaft intersecting chain drive device (2).

2. The mahjong tile cleaning device for a mahjong machine according to claim 1, characterized in that, A dual-axis motor (10) is provided at the middle position of the base (1) to provide power to the parallel shaft interlaced chain drive device (2). The two output main shafts (101) and output secondary shafts (102) of the dual-axis motor (10) are located at the same end of the motor and on the same horizontal line. The parallel shaft staggered chain drive device (2) includes drive shafts (21) connected to the output main shaft (101) and the output secondary shaft (102) respectively. The drive shafts (21) are fixed on the frame mounted on the base (1) by bearing seats. Both drive shafts (21) are provided with drive sprockets (22). Each drive sprocket (22) is engaged with a conveyor chain (24) with a paddle (23). The two conveyor chains (24) are arranged in parallel staggered arrangement on the parallel drive shafts (21). A guide support plate (25) is provided below the conveyor chains (24). The two conveyor chains (24) pass around each The driving sprocket (22) extends in opposite directions to its respective driven end via the guide support plate (25). One side of the conveyor chain (24) extends toward the magnetic card flipper (4), and the other side of the conveyor chain (24) extends toward the second cleaning device (6). A frame is set on the base (1) at the corresponding position of the magnetic card flipper (4) and the second cleaning device (6). A driven shaft (26) with a driven sprocket (27) is installed on the frame via a bearing seat. The two conveyor chains (24) mesh with the driven sprocket (27) to form two synchronously running closed transmission circuits.

3. A mahjong tile cleaning device for a mahjong machine according to claim 2, characterized in that, The magnetic card flipping controller (4) includes a card-attracting wheel (41), which is a partially cylindrical structure formed by cutting along the axial direction. A permanent magnet (42) is provided on the cutting plane of the card-attracting wheel (41). The magnetic poles of the permanent magnet (42) are opposite to the magnetic poles of the magnets inside the mahjong tile (11). The card-attracting wheel (41) attracts one mahjong tile (11) for each rotation. When the cutting plane of the card-attracting wheel (41) reaches the bottom, the mahjong tile (11) flips to face up. The mahjong tile (11) falls onto the transmission track (32) under its own weight and the push of the paddle (23) of the parallel axis intersecting chain transmission device (2), thereby realizing the functions of controlling the card entry and automatic flipping.

4. The mahjong cleaning device for mahjong machine according to claim 3, characterized in that, The magnetic card flipper (4) also includes a double gear (43) and a driven gear (44) fixed on the rotating shaft of the card suction wheel (41). Two driven sprockets (27) are installed side by side on the driven shaft (26) near the magnetic card flipper (4). One of the driven sprockets (27) meshes with the corresponding conveyor chain (24) to maintain a closed transmission circuit. The other driven sprocket (27) meshes with one end of the double gear (43) to transmit power to the double gear (43). The other end of the double gear (43) extends out of the frame and is connected to the driven gear (44) of the card controller through a synchronous chain. When the conveyor chain (24) runs and drives the driven shaft (26) to rotate, the power is transmitted step by step through the driven sprocket (27) - double gear (43) - synchronous chain - driven gear (44) of the card controller, and finally drives the card suction wheel (41) to rotate.

5. The mahjong cleaning device for mahjong machine according to claim 1, characterized in that, The first cleaning device (5) includes a cleaning housing (51) mounted on a guide rail (3). A removable and cleanable cleaning box (52) is provided inside the cleaning housing (51). Both the cleaning housing (51) and the removable and cleanable cleaning box (52) have clearance grooves (57) corresponding to the paddle groove (33) at their bottoms. Floating cleaning sliders (53) are connected to the two side walls of the removable and cleanable cleaning box (52) by floating slider springs (54). Each floating cleaning slider (53) has a three-sided high-density nano sponge (55) connected to its inner side. A spring is provided at the center of the outer side of the top of the three-sided high-density nano sponge (55) to automatically adjust the adhesion according to the height of the mahjong tile (11).

6. A mahjong tile cleaning device for a mahjong machine according to claim 5, characterized in that, The cleaning housing (51) is provided with a liquid injection hole (56), and a cleaning liquid storage box (9) is provided on the base (1). The cleaning liquid storage box (9) is connected to the liquid injection holes (56) of the first cleaning device (5) and the second cleaning device (6) through pipelines to form a liquid supply channel, so as to accurately spray the cleaning liquid onto the three-sided high-density nano sponge (55) in the cleaning device.

7. A mahjong tile cleaning device for a mahjong machine according to claim 1, characterized in that, A nano-brush roller (8) with an angle of 45 degrees to the track is provided on the gradient guide section of the turntable track (31). The brush filaments of the nano-brush roller (8) adhere to the complex groove structure of the characters on the surface of the mahjong tile (11) to remove accumulated dust, oil and residue.

8. A mahjong tile cleaning device for a mahjong machine according to claim 1, characterized in that, A drying fan (12) and an ultraviolet disinfection lamp (13) are provided on the transmission track (32) downstream of the second cleaning device (6).

9. A mahjong tile cleaning device for a mahjong machine according to claim 1, characterized in that, An inclined fixed section sliding groove (7) is provided on the first cleaning device (5). The angle between the inclined fixed section sliding groove (7) and the horizontal plane is 25 degrees. One end of the inclined fixed section sliding groove (7) serves as the feeding end, which is used to receive and transport the mahjong tiles (11) arranged by the mahjong machine with the characters facing down into the cleaning machine. The other end extends to the magnetic flipping tile controller (4) to realize the control of the tile feeding.

10. A mahjong tile cleaning device for a mahjong machine according to claim 1, characterized in that, The card-turning track (31) adopts a split structure that is symmetrically divided along the longitudinal centerline. A strip-shaped limiting groove (311) is integrally formed on the outside of the L-shaped bend. By limiting the screw to different positions of the strip-shaped limiting groove (311), the width of the card-turning track (31) can be adjusted to accommodate mahjong tiles (11) of different sizes.

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