Pushing-up card device and automatic mahjong machine thereof

Abstract

The utility model relates to mahjong machine field discloses push and lift tile device and automatic mahjong machine, including frame, install the tile board that lifts, driver and the carousel with the push tile head on the frame, and driver drives the swing of lift tile board and drives carousel rotation push tile, still install the sliding block and the swing bar on the frame, the cam is installed to the one end of sliding block, and driver drives the rotation of cam through gear transmission, and the cam drives the linear motion of sliding block on the frame, the other end of sliding block is connected with swing bar and drives its swing, and the swing bar swings and drives the lift of tile board, through single driver, carousel rotation push tile and lift tile board swing lift can be realized simultaneously, need not additionally add power component, reduce the number of power source, reduce the hardware cost and assembly complexity of overall device, avoid the cumbersome problem of multiple power source coordination control simultaneously, make power output more concentrated and efficient.

Description

Technical Field

[0001] This utility model relates to the field of mahjong machines, and more particularly to a tile-lifting device and its automatic mahjong machine. Background Technology

[0002] As a key functional component of rotary mahjong machines, the tile-pushing and lifting device is primarily responsible for pushing the mahjong tiles from the storage structure to the lifting plate, and then using the lifting plate's raising and lowering mechanism to lift the tiles onto the mahjong table. Its structural design directly affects the manufacturing cost, operational stability, and user experience of the mahjong machine. With the mahjong machine industry's increasing demands for product cost-effectiveness and structural reliability, the technical shortcomings of traditional tile-pushing and lifting devices and the potential for optimization in existing solutions are becoming increasingly apparent.

[0003] Early tile-pushing and lifting devices mostly adopted a "dual-motor independent drive" structure. That is, one motor controls the lifting plate's raising and lowering action, while the other motor drives the tile-pushing components (such as the tile-pushing rod) to push the mahjong tiles. Although this design can achieve basic functions, it has obvious shortcomings: First, the dual-motor configuration significantly increases the hardware cost and assembly complexity of the equipment, while also increasing the difficulty of later maintenance; second, the coordinated operation of the two motors requires complex control logic, which is prone to synchronization problems, leading to poor coordination between the tile pushing and lifting actions, resulting in malfunctions such as tile jamming and tile lifting stuttering, thus affecting the user experience.

[0004] To address the cost and control issues of dual-motor solutions, the industry has developed an improved "single-motor drive" solution, with the card-pushing and lifting device disclosed in utility model patent CN 222723590 U being a typical example. This patented solution uses a single motor to drive the rotation of a turntable assembly consisting of an inner turntable, an outer turntable, and a gear ring. The card-pushing rod on the outer turntable or gear ring pushes the cards, while the annular track on the end face of the inner turntable drives the linkage assembly to move, thereby raising and lowering the card-lifting plate. This successfully achieves synchronous control of both the card-pushing and lifting actions by a single motor, reducing manufacturing costs, eliminating the need for forward and reverse motor rotation, and simplifying the control program.

[0005] However, this patented solution still has significant limitations in structural design and production application: its transmission system is composed of multiple sets of precision components working together, including the axial limiting structure of the inner and outer turntables, the meshing transmission structure of the gear ring and the driving gear, and the cooperation structure of the inner turntable's annular track and the connecting rod assembly, etc., resulting in a high overall structural complexity. To ensure smooth transmission between components—such as the precise meshing of the gear ring and the driving gear, the stable movement of the rollers along the annular track, and the flexible linkage of the lever and the pull rod—extremely high requirements must be placed on the dimensional accuracy and geometric tolerances of each component. For example, the machining accuracy of the curvature of the inner turntable track, the pitch tolerance of the gears, and the coaxiality of the lever hinge points, undoubtedly increasing the processing difficulty and production cost. At the same time, during assembly, the relative positional accuracy of each component must be strictly guaranteed, such as the installation and positioning accuracy of the motor, turntable assembly, and connecting rod assembly on the card storage frame. If the assembly deviation exceeds the allowable range, it can easily lead to jamming between components and transmission failure, thereby affecting the overall operational stability of the device and increasing the complexity of the assembly process and production time.

[0006] In summary, although the existing card pushing and lifting device with announcement number CN 222723590 U has optimized cost and control logic through single-motor drive, its complex structure and high processing precision and high assembly requirements still pose challenges to its production and application. There is an urgent need to further simplify the structural design and reduce the dependence on processing and assembly precision in order to improve production efficiency and long-term operational reliability. Utility Model Content

[0007] This utility model addresses the shortcomings of existing technologies by providing a tile-lifting device and its automatic mahjong machine.

[0008] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method: The card-lifting device includes a frame, on which a card-lifting plate, a driver, and a turntable with a card-pushing head are mounted. The driver drives the card-lifting plate to swing up and down and drives the turntable to rotate and push the cards. The frame is also equipped with a slider and a rocker arm. A cam is installed at one end of the slider. The driver drives the cam to rotate through gear transmission. The cam drives the slider to make linear motion on the frame. The other end of the slider is connected to the rocker arm and drives it to swing. The rocker arm swings and drives the lifting plate to rise and fall.

[0009] Preferably, one end of the slider is provided with a cam groove for placing the cam. The cam rotates in the cam groove, and the cam abuts against the groove wall of the cam groove and drives the slider to move.

[0010] Preferably, the device also includes a driven gear, which is driven to rotate by the driver through gear transmission. The cam is fixed on the driven gear, and the driven gear rotates synchronously with the cam.

[0011] Preferably, a first pin is positioned on the frame, and a guide hole is provided on the slider, which is laterally set on the cam groove. The first pin is connected to the cam through the guide hole, and the cam is fitted on the first pin and can rotate around it.

[0012] Preferably, the other end of the slider is provided with a straight tooth and a guide groove. The guide groove is located above the straight tooth and its opening faces the rocker arm. A rocker tooth is provided on the shaft at one end of the rocker arm. The rocker tooth meshes with the straight tooth and the end of the shaft extends into the guide groove and slides therein.

[0013] Preferably, the turntable is equipped with a gear ring, and the driver is connected to a drive gear. When the drive gear meshes with both the gear ring and the driven gear at the same time, the turntable rotates and the lifting plate descends. When the drive gear meshes only with the gear ring, the turntable rotates and the lifting plate remains stationary. When the drive gear meshes only with the driven gear, the turntable does not rotate and the lifting plate rises.

[0014] Preferably, the gear ring has a toothless portion and a toothed portion. When the driving gear meshes with the toothed portion of the gear ring, the gear ring rotates; when the driving gear moves to the toothless portion of the gear ring, the gear ring does not rotate. The driven gear has a driven toothless part and a driven toothed part. When the driving gear meshes with the driven toothed part, the lifting plate descends or rises. When the driving gear moves to the driven toothless part, the lifting plate descends to the designated position and remains stationary.

[0015] Preferably, the toothless part of the gear ring is provided with a protrusion, the end face of the driven gear is provided with a protrusion, and the protrusion is provided with a groove. The groove is adapted to the protrusion and drives the gear ring to rotate. The driving gear disengages from the toothless part of the gear ring and meshes with the toothed part of the gear ring. The protrusion has a notch or groove that connects to the groove. The gear ring rotates and drives the protrusion into the notch or groove. The protrusion abuts against the side wall of the protrusion and drives it to rotate, so that the driving gear disengages from the driven toothless part and meshes with the driven toothed part.

[0016] Preferably, a drive gear is mounted on the output shaft of the driver, the drive gear meshes with the driving gear, and the driving gear is mounted on the frame via a second pin.

[0017] An automatic mahjong machine includes a mahjong table with a tile-lifting device installed on the table.

[0018] This utility model, by adopting the above technical solution, has significant technical effects: A single driver can synchronously achieve the rotation of the turntable pushing cards and the swinging and lifting of the card-raising plate, eliminating the need for additional power components. This reduces the number of power sources, lowers the overall hardware cost and assembly complexity of the device, and avoids the cumbersome problem of coordinating multiple power sources, making the power output more concentrated and efficient.

[0019] By utilizing the cooperation of a cam and a slider, the rotational motion of the driver is converted into the linear movement of the slider. The slider then drives the rocker arm to swing, thereby raising and lowering the plate. The transmission path is short and direct. The profile characteristics of the cam can precisely control the movement stroke and rhythm of the slider, thus ensuring the stability and accuracy of the plate raising and lowering action. At the same time, this structural design is compact, effectively saving internal space of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model without a frame.

[0021] Figure 2 yes Figure 1 A structural diagram from another perspective.

[0022] Figure 3 yes Figure 2 An enlarged diagram of A in the diagram.

[0023] Figure 4 This is a schematic diagram of the meshing structure between the gear ring and each gear.

[0024] Figure 5 This is a schematic diagram of the toothed ring and the pusher head.

[0025] Figure 6 This is a schematic diagram of the driven gear.

[0026] Figure 7 This is a schematic diagram of the slider's structure.

[0027] Figure 8 This is a schematic diagram of the combined structure of the frame and its components.

[0028] The names of the body parts referred to by the numbers in the above attached diagrams are as follows: 10—Frame, 11—Lifting plate, 12—Driver, 13—Turntable, 14—Slider, 15—Rocker, 16—Cam, 17—Driven gear, 18—First pin, 19—Drive gear, 20—Drive gear, 21—Second pin 131—Gear ring, 1311—Gear ring without teeth, 1312—Gear ring with teeth, 1313—Protruding post 141—Cam groove, 142—Guide hole, 143—Straight tooth section, 144—Guide groove 151—Shaft, 152—Rod gear 171—Driven toothless portion, 172—Driven toothed portion, 173—Protrusion, 174—Groove, 175—Notch groove Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-8 The present invention will be further described in detail with reference to the embodiments.

[0030] Example 1 The tile-lifting device includes a frame 10, on which a tile-lifting plate 11, a driver 12, and a turntable 13 with a tile-pushing head are mounted. One end of the tile-lifting plate 11 is hinged to the frame 10. The frame 10 has a spiral tile-lifting channel. Before tile lifting is required, the other end of the tile-lifting plate 11 descends to the tile-lifting channel. The turntable 13 moves with the tile-pushing head in the tile-lifting channel, thereby pushing the mahjong tiles in the tile-lifting channel onto the tile-lifting plate 11. The tile-lifting plate 11 then lifts the mahjong tiles on it onto the surface of the mahjong table. The driver 12 is a servo motor. The driver 12 drives the card lifting plate 11 to swing up and down and drives the turntable 13 to rotate and push the cards. The frame 10 is also equipped with a slider 14 and a swing arm 15. A cam 16 is installed at one end of the slider 14. The driver 12 drives the cam 16 to rotate through gear transmission. The cam 16 drives the slider 14 to make linear motion on the frame 10. The other end of the slider 14 is connected to the swing arm 15 and drives it to swing. The swing arm 15 swings and drives the card lifting plate 11 to rise and fall.

[0031] The driver 12 directly drives the turntable 13 with the card pusher head to rotate, and the rotation of the turntable 13 drives the card pusher head to complete the mahjong card pushing action. On the other hand, it drives the cam 16 installed at one end of the slider 14 to rotate through gear transmission. The cam 16 uses its own contour characteristics to convert the rotational motion into the linear motion of the slider 14 on the frame 10. When the slider 14 moves, it drives the swing rod 15 connected to it to swing. Finally, the swing rod 15 drives the card lifting plate 11 to complete the swing lifting action, thereby realizing the card pushing and card lifting functions simultaneously.

[0032] The device can synchronously drive the turntable 13 to push cards and the lifting plate 11 to rise and fall with only a single driver 12, without the need for additional power components, which greatly simplifies the overall structure and reduces hardware costs. The transmission method of cam 16 and slider 14 can accurately control the linear motion stroke of slider 14, and then stabilize the lifting rhythm of lifting plate 11 through swing arm 15, ensuring the accuracy and stability of the lifting action.

[0033] The slider 14 has a cam groove 141 at one end for placing the cam 16. The cam 16 rotates in the cam groove 141 and abuts against the groove wall of the cam groove 141, which drives the slider 14 to move. When the driver 12 drives the cam 16 to rotate via gear transmission, the cam 16 continuously abuts against the groove wall of the cam groove 141. The cam 16's own contour changes (such as the alternation of convex and concave parts) generate a pushing and pulling force on the groove wall of the cam groove 141, thus converting the rotational motion of the cam 16 into the linear motion of the slider 14 on the frame 10. The slider 14 then drives the rocker arm 15 to swing, thereby driving the lifting plate 11 to complete the swinging and lifting. Simultaneously, the driver 12 synchronously drives the turntable 13 with the pusher head to rotate and push the plates, ultimately achieving coordinated operation of pushing and lifting the plates. The slider 14, through the cam groove 141 and the cam 16, can form a stable limit and containment for the cam 16, preventing the cam 16 from shifting or falling off during rotation, ensuring the stability of the transmission between the cam 16 and the slider 14; the cam 16 The transmission method using the cam groove 141 wall allows the contour force of the cam 16 to be transmitted to the slider 14 more evenly, reducing component wear caused by localized force concentration and extending the service life of the slider 14 and the cam 16. At the same time, the design of the cam groove 141 provides precise motion guidance for the cam 16, which can further ensure the stroke accuracy of the cam 16 driving the slider 14 in linear motion, thereby improving the accuracy of the lifting action of the lifting plate 11 and avoiding problems such as plate lifting jamming or positional deviation caused by transmission deviation.

[0034] The lifting device also includes a driven gear 17. The driver 12 drives the driven gear 17 to rotate via gear transmission. The cam 16 is fixed on the driven gear 17. In this embodiment, the cam 16 is integrally formed on the driven gear 17, and the driven gear 17 and the cam 16 rotate synchronously. By utilizing the precision of gear transmission, the power of the driver 12 is ensured to be stably and efficiently transmitted to the cam 16, avoiding slippage or deviation during power transmission.

[0035] A first pin 18 is positioned on the frame 10, and a guide hole 142 is provided on the slider 14, which is horizontally arranged on the cam groove 141. The first pin 18 is connected to the cam 16 through the guide hole 142. The cam 16 is fitted on the first pin 18 and can rotate around it. The first pin 18 positioned on the frame 10 provides a fixed rotation axis for the cam 16. The cam 16 is fitted on the first pin 18 and can rotate stably around it. At the same time, the slider 14 is provided with a guide hole 142 that runs horizontally through the cam groove 141. The first pin 18 passes through the guide hole 142 and is connected to the cam 16. When the driver 12 drives the cam 16 to rotate around the first pin 18 through gear transmission, the cam 16 rotates in the cam groove 141 of the slider 14 and continuously abuts against the groove wall, using its own contour change to generate force on the groove wall. During this process, the first pin 18 restricts the movement direction of the slider 14 through the guide hole 142, so that the slider 14 can only move in a straight line along the lateral direction of the guide hole 142, thereby driving the subsequent swing arm to swing and drive the lifting plate 11 to complete the lifting action, while cooperating with the turntable to realize the card pushing function. The guide hole 142 on the slider 14 cooperates with the first pin 18, which can strictly limit the movement trajectory of the slider 14, prevent the slider 14 from shifting laterally or wobbling during linear movement, and further ensure the accuracy of the slider 14 driving the swing arm and the lifting plate.

[0036] The other end of the slider 14 is provided with a straight tooth 143 and a horizontally arranged guide groove 144. The guide groove 144 is located above the straight tooth 143 and its opening faces the rocker arm 15. The shaft 151 at one end of the rocker arm 15 is provided with a rocker tooth 152, which meshes with the straight tooth 143. The end of the shaft 151 extends into the guide groove 144 and slides within it. When the cam 16 drives the slider 14 to make linear motion on the frame, the straight tooth 143 of the slider 14, through meshing with the rocker tooth 152, converts the linear motion into the swing motion of the rocker arm 15. During this process, the end of the shaft 151 will slide synchronously within the guide groove 144. The meshing structure forms an auxiliary guide and limit for the swing trajectory of the rocker arm 15. Finally, the rocker arm 15 drives the lifting plate 11 to complete the swing lifting action, providing power for lifting the mahjong tiles after they are pushed. The end of the shaft 151 of the rocker arm 15 extends into the guide groove 144 of the slider 14 and slides. The guide groove 144 can limit the movement of the shaft 151, preventing the rocker arm 15 from deviating up and down or wobbling during the swinging process. At the same time, it helps guide the rocker arm 15 to swing along a predetermined trajectory, further improving the stability of the transmission structure and avoiding jamming of components due to misalignment.

[0037] Differential control of the card-pushing and card-raising actions is achieved through different meshing combinations of the driving gear 19 with the gear ring 131 and the driven gear 17. The turntable 13 is equipped with a gear ring 131, and the driver 12 is connected to the driving gear 19. The driving gear 19 can transmit power through three meshing states: First, when the driving gear 19 meshes with both the gear ring 131 and the driven gear 17 simultaneously, the power of the driver 12 is synchronously transmitted to the gear ring 131 and the driven gear 17 via the driving gear 19. The gear ring 131 drives the turntable 13 to rotate to complete the card-pushing action. The driven gear 17 drives the slider 14, the rocker arm 15, and other structures through the cam 16, ultimately causing... The lifting plate 11 descends; secondly, when the driving gear 19 meshes only with the gear ring 131, power is only transmitted to the gear ring 131, driving the turntable 13 to rotate and push the plate, while the driven gear 17 receives no power input, the plate-lifting transmission structure does not operate, and the lifting plate 11 remains stationary; thirdly, when the driving gear 19 meshes only with the driven gear 17, power is only transmitted to the driven gear 17, driving the plate-lifting structure to operate, causing the lifting plate 11 to rise, while the gear ring 131 receives no power input, and the turntable 13 does not rotate. All three operating states rely on the same driver 12 to transmit power through gear meshing, eliminating the need for additional power components, significantly simplifying the overall structure of the device and reducing hardware costs; simultaneously, complex multi-power source collaborative control logic is unnecessary, and the operating mode can be switched simply by adjusting the meshing object of the driving gear 19, reducing the difficulty of control program design and the probability of failure.

[0038] The gear ring 131 is provided with a toothless part 1311 and a toothed part 1312. When the driving gear 19 meshes with the toothed part 1312, the gear ring 131 rotates; when the driving gear 19 moves to the toothless part 1311, the gear ring 131 does not rotate. The driven gear 17 is provided with a driven toothless part 171 and a driven toothed part 172. When the driving gear 19 meshes with the driven toothed part 172, the lifting plate 11 descends or rises. When the driving gear 19 moves to the driven toothless part 171, the lifting plate 11 descends to the designated position and remains stationary.

[0039] When the driver 12 drives the drive gear 19 to mesh with the toothed part 1312 of the gear ring, the drive gear 19 transmits power to the gear ring 131, causing the gear ring 131 and the associated turntable 13 to rotate, thereby completing the card pushing action; when the drive gear 19 disengages from the toothed part 1312 of the gear ring and moves to the toothless part 1311 of the gear ring, the drive gear 19 and the gear ring 131 are no longer meshed, the gear ring 131 stops rotating, and the turntable 13 also stops pushing the cards. In terms of controlling the card-raising action, the driven gear 17 is equipped with a driven toothless part 171 and a driven toothed part 172. When the driving gear 19 meshes with the driven toothed part 172, power is transmitted to the driven gear 17. The driven gear 17 drives the sliding block 14, the rocker arm 15, and other card-raising transmission structures through the cam 16, causing the card-raising plate 11 to descend or rise. When the driving gear 19 moves to the driven toothless part 171, the driving gear 19 and the driven gear 17 are no longer meshed, the card-raising transmission structure stops, and the card-raising plate 11 remains stationary after descending to the designated position. Without relying on a complex electronic control system or additional switching mechanisms, the automatic start / stop and state switching of the card-raising and pushing actions can be achieved solely through the gear's own "toothed part-toothless part" mechanical structure. This reduces reliance on control programs, lowers the risk of uncontrolled action due to electronic component failure, and simplifies the overall control design of the device.

[0040] The toothless portion 1311 of the gear ring is provided with a protrusion 1313, which is integrally formed on the gear ring 131. The end face of the driven gear 17 is provided with a protrusion 173, and the protrusion 173 is provided with a groove 174. The groove 174 is adapted to the protrusion 1313 and drives the gear ring 131 to rotate. The driving gear 19 disengages from the toothless portion 1311 of the gear ring and meshes with the toothed portion 1312 of the gear ring. The protrusion 173 is provided with a notch 175, which is connected to the groove 174. The gear ring 131 rotates and drives the protrusion 1313 into the notch 175. The protrusion 1313 abuts against the side wall of the protrusion 173 and drives it to rotate, so that the driving gear 19 disengages from the driven toothless part 171 and meshes with the driven toothed part 172.

[0041] When the groove 174 engages with the protrusion 1313, the driven gear 17 can drive the protrusion 1313 to move through the groove 174, thereby driving the gear ring 131 to rotate. This causes the driving gear 19 to disengage from the toothless portion 1311 of the gear ring and mesh with the toothed portion 1312, preparing for the rotation of the turntable 13 to push the card. At the same time, the protrusion 173 is also provided with a notch 175 that communicates with the groove 174. When the gear ring 131 rotates, it drives the protrusion 1313 into the notch 175. At this time, the protrusion 1313 abuts against the side wall of the protrusion 173 and drives the driven gear 17 to rotate, causing the driving gear 19 to disengage from the driven toothless portion 171 and mesh with the driven toothed portion 172, providing a power transmission basis for the lifting action of the card lifting plate 11. Through the mechanical adaptation and transmission of the protrusion 1313 with the groove 174 and the notch 175, the meshing switching of the driving gear 19 with the gear ring 131 (toothless part 1311 / toothed part 1312) and the driven gear 17 (driven toothless part 171 / driven toothed part 172) can be completed automatically. This eliminates the need for a complex electronic control system or manual intervention, simplifies the control logic of the device, and reduces the risk of switching failure due to electronic component failure.

[0042] Example 2 Example 2 is basically the same as Example 1, except that a drive gear 20 is mounted on the output shaft of the driver 12. The drive gear 20 meshes with the drive gear 19, which is mounted on the frame 10 via a second pin 21. When it is necessary to adjust the mounting position of the driver 12 to adapt to the layout of other components inside the frame 10, avoid spatial conflicts, or optimize the force state of the driver 12 according to assembly requirements, it is only necessary to adjust the meshing parameters of the drive gear 20 and the drive gear 19 (such as fine-tuning the center distance under gear module matching). This allows for flexible changes to the mounting coordinates of the driver 12 on the frame 10 while ensuring stable power transmission to the drive gear 19. There is no need to make significant changes to the mounting position of the drive gear 19 or its subsequent meshing relationship with the gear ring 131 and the driven gear 17. This effectively improves the flexibility of the driver 12 mounting layout and reduces the design and assembly difficulty of the overall layout of the components inside the frame 10.

[0043] Example 3 An automatic mahjong machine includes a mahjong table with a tile-lifting device installed on the table.

Claims

1. A card-lifting device, comprising a frame (10), on which a card-lifting plate (11), a driver (12), and a turntable (13) with a card-pushing head are mounted, wherein the driver (12) drives the card-lifting plate (11) to swing and lift and drives the turntable (13) to rotate and push cards, characterized in that: The frame (10) is also equipped with a slider (14) and a swing arm (15). A cam (16) is installed at one end of the slider (14). The driver (12) drives the cam (16) to rotate through gear transmission. The cam (16) drives the slider (14) to make linear motion on the frame (10). The other end of the slider (14) is connected to the swing arm (15) and drives it to swing. The swing arm (15) swings and drives the lifting plate (11) to rise and fall.

2. The pusher device according to claim 1, characterized in that: The slider (14) has a cam groove (141) at one end for placing the cam (16). The cam (16) rotates in the cam groove (141). The cam (16) abuts against the groove wall of the cam groove (141) and drives the slider (14) to move.

3. The pusher device according to claim 1, characterized in that: It also includes a driven gear (17), and the driver (12) drives the driven gear (17) to rotate through gear transmission. The cam (16) is fixed on the driven gear (17), and the driven gear (17) and the cam (16) rotate synchronously.

4. The lifting device according to claim 2, characterized in that: The frame (10) has a first pin (18) positioned on it. The slider (14) has a guide hole (142) that is laterally set on the cam groove (141). The first pin (18) is connected to the cam (16) through the guide hole (142). The cam (16) is fitted on the first pin (18) and can rotate around it.

5. The lifting device according to any one of claims 1-4, characterized in that: The other end of the slider (14) is provided with a straight tooth (143) and a guide groove (144). The guide groove (144) is located above the straight tooth (143) and its opening faces the rocker arm (15). The shaft (151) at one end of the rocker arm (15) is provided with a rocker tooth (152). The rocker tooth (152) meshes with the straight tooth (143). The end of the shaft (151) extends into the guide groove (144) and slides within it.

6. The pusher device according to claim 3, characterized in that: The turntable (13) is provided with a gear ring (131), and the driver (12) is connected to a drive gear (19). When the drive gear (19) meshes with both the gear ring (131) and the driven gear (17) at the same time, the turntable (13) rotates and the lifting plate (11) descends. When the drive gear (19) meshes only with the gear ring (131), the turntable (13) rotates and the lifting plate (11) remains stationary. When the drive gear (19) meshes only with the driven gear (17), the turntable (13) does not rotate and the lifting plate (11) rises.

7. The pusher device according to claim 6, characterized in that: The gear ring (131) is provided with a toothless part (1311) and a toothed part (1312). When the driving gear (19) meshes with the toothed part (1312), the gear ring (131) rotates; when the driving gear (19) moves to the toothless part (1311), the gear ring (131) does not rotate. The driven gear (17) is provided with a driven toothless part (171) and a driven toothed part (172). When the driving gear (19) meshes with the driven toothed part (172), the lifting plate (11) descends or rises. When the driving gear (19) moves to the driven toothless part (171), the lifting plate (11) descends to the designated position and remains stationary.

8. The pusher device according to claim 7, characterized in that: The toothless part (1311) of the gear ring is provided with a protrusion (1313), and the end face of the driven gear (17) is provided with a protrusion (173). The protrusion (173) is provided with a groove (174). The groove (174) is adapted to the protrusion (1313) and drives the gear ring (131) to rotate. The driving gear (19) disengages from the toothless part (1311) of the gear ring and meshes with the toothed part (1312) of the gear ring. The protrusion (173) is provided with a notch (175), which is connected to the groove (174). The gear ring (131) rotates and drives the protrusion (1313) into the notch (175). The protrusion (1313) abuts against the side wall of the protrusion (173) and drives it to rotate, so that the driving gear (19) disengages from the driven toothless part (171) and meshes with the driven toothed part (172).

9. The lifting device according to any one of claims 6-8, characterized in that: A drive gear (20) is mounted on the output shaft of the driver (12). The drive gear (20) meshes with the drive gear (19). The drive gear (19) is mounted on the frame (10) via a second pin (21).

10. An automatic mahjong machine, including a mahjong table, characterized in that: The mahjong table is equipped with a tile-lifting device as described in any one of claims 1-9.

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