Desktop type automatic mahjong machine

Abstract

The utility model discloses a desktop type automatic mahjong machine, which belongs to the technical field of automatic mahjong machines, and comprises a mahjong main machine and a desktop board, the mahjong main machine comprises a machine body provided with a shuffling barrel; at least two tile returning holes communicated with the shuffling barrel are formed in the table top plate, the tile returning holes are uniformly distributed around the center of the table top plate, opening and closing mechanisms corresponding to the tile returning holes are arranged below the table top plate, and each opening and closing mechanism comprises a guide rail fixedly installed and a baffle connected to the guide rail in a sliding mode. And the baffle moves back and forth along the guide rail to open or close the mahjong returning hole. According to the utility model, through the dispersedly arranged multi-card returning hole structure, players can return cards nearby, so that the operation convenience is improved, the crowding phenomenon of central card returning and the interference to the card playing mechanism are avoided, and the equipment reliability and the user experience are improved.

Description

Technical Field

[0001] This utility model relates to the field of automatic mahjong machine technology, and in particular to an automatic mahjong machine with multiple return tile holes. Background Technology

[0002] Mahjong, a recreational game originating in China, is loved by the masses. With the popularization of fully automatic mahjong machines, the traditional manual shuffling and arranging of mahjong tiles has gradually been replaced by modern automated methods. Currently, most mainstream automatic mahjong machines on the market adopt a four-stage lifting mechanism design, which is complex in structure and requires two sets of magnetic mahjong tiles, resulting in heavy machines and high manufacturing and operating costs.

[0003] Chinese patent CN107376336B discloses an automatic mahjong machine. This machine features a novel structure that automatically ejects mahjong tiles from the center for players to grab, requiring only a single set of magnetically attached tiles. The machine includes a shuffling mechanism, a tile-picking and conveying mechanism, and a tile-lifting mechanism, all controlled by a control system and installed within the machine body. The tile-picking and conveying mechanism consists of two sets of conveying units positioned opposite each other on either side of the tile-lifting mechanism. When the tile-lifting mechanism's lifting platform descends, it simultaneously receives mahjong tiles from the conveying units on both sides; when the platform rises, it lifts the tiles from the tabletop to the center of the table. This automatic mahjong machine simplifies the structural design, makes the machine lighter, and significantly reduces manufacturing costs. Furthermore, it completely eliminates the possibility of cheating, resulting in a clean and tidy playing surface for the player.

[0004] However, this automatic mahjong machine uses a central card return structure. The card return hole is located at the center of the card dispensing panel. When the central panel rises, the player pushes the mahjong tiles into the return hole, causing them to fall back into the shuffling bin for the next round of shuffling. This structure has the following drawbacks: 1. It requires all players to push the mahjong tiles to the center of the table, which is inconvenient and does not conform to ergonomic principles. Moreover, it is easy for the tiles to crowd each other or even hit the player's hand when pushing the tiles. 2. The mahjong tiles falling back into the shuffling bin are concentrated in the center, increasing the possibility of tile stacking and the difficulty of shuffling. 3. The tile lifting mechanism of the mahjong machine is also located in the center of the machine. Although there is a high-tension spring acting as a barrier, it still cannot completely prevent the mahjong tiles from falling into the tile lifting mechanism when falling back into the shuffling bin, affecting the smoothness of the game. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a desktop automatic mahjong machine that is easy to operate and has a good user experience.

[0006] The technical solution of this utility model is:

[0007] A desktop automatic mahjong machine includes a mahjong main unit and a desktop panel. The mahjong main unit includes a body with a shuffling drum. The desktop panel has at least two card return holes communicating with the shuffling drum. The card return holes are evenly distributed around the center of the desktop panel. Below the desktop panel is an opening and closing mechanism corresponding to each card return hole. The opening and closing mechanism includes a fixedly installed guide rail and a baffle slidably connected to the guide rail. The baffle moves back and forth along the guide rail to open or close the card return hole.

[0008] This structure allows players to push mahjong tiles into the corresponding return slots as close as possible, reducing the distance and difficulty of pushing the tiles. Multiple return slots also prevent congestion in the center, resulting in a more even distribution of tiles after they fall into the shuffling bin, improving shuffling effectiveness and efficiency. The independent design of the return slots avoids the risk of tiles interfering with the tile-pushing mechanism when falling back, improving the reliability of the equipment and the smoothness of the game. The opening and closing mechanism allows the return slots to be opened at the end of the game and closed during the game, effectively preventing tiles from accidentally entering the return slots.

[0009] As an optimization, in the aforementioned desktop automatic mahjong machine, the number of return tiles holes is two, symmetrically distributed along a diagonal line of the desktop with respect to the center of the desktop. This layout allows the four players to be divided into two groups, with each group using one return tile hole, and each player being equidistant from their respective return tile hole. This balances the convenience of return tiles for each player while maintaining the overall symmetry and aesthetics of the desktop. The design of two return tile holes satisfies functional requirements while avoiding the structural complexity and aesthetic impact of too many openings.

[0010] As an optimization, in the aforementioned desktop automatic mahjong machine, the opening and closing mechanism further includes an opening and closing drive motor and an opening and closing swing arm. One end of the swing arm is fixedly connected to the motor shaft of the opening and closing drive motor, and the other end is connected to a baffle. The operation of the opening and closing drive motor can drive the swing arm to move the baffle along the guide rail. Using a motor-driven opening and closing mechanism allows for automated control of the card return hole, eliminating the need for manual operation by the player and improving the user experience.

[0011] Furthermore, in the aforementioned desktop automatic mahjong machine, the mahjong main unit also includes a control system, and a shuffling mechanism, a card-picking and conveying mechanism, and a card-lifting mechanism installed inside the machine body and controlled by the control system. The card-lifting mechanism is located in the central area of ​​the machine body. Mahjong tiles are conveyed from the shuffling mechanism to the card-picking and conveying mechanism and then pushed to the central area of ​​the tabletop by the card-lifting mechanism. The card-picking and conveying mechanism includes at least one set of conveying units. Each conveying unit includes a card-suction wheel, a conveyor belt, and a conveyor drive motor. The card-suction wheel is set inside the shuffling drum and is driven to rotate by the conveyor drive motor. The input end of the conveyor belt is wrapped around the card-suction wheel, and the output end is connected to the card-lifting mechanism, conveying the mahjong tiles sucked by the card-suction wheel to the card-lifting mechanism. The card-lifting mechanism includes a lifting platform and a lifting drive unit that drives the lifting platform to move up and down reciprocally. The output end of the conveyor belt corresponds to the lifting platform. When the lifting platform descends, its surface receives mahjong tiles from the conveyor belt, and when it rises, it pushes the mahjong tiles onto the tabletop.

[0012] As an optimization, in the above-mentioned desktop automatic mahjong machine, the platform of the lifting platform is divided into two adjacent mahjong tile positions, and the tile picking and conveying mechanism has two sets of conveying units. The conveyor belts of the two sets of conveying units correspond to the two mahjong tile positions respectively, and the two conveyor belts are arranged in parallel and adjacent to each other.

[0013] As an optimization, in the above-mentioned desktop automatic mahjong machine, the mahjong main unit also includes an operation panel located in the center of the machine body, a tile-lifting mechanism installed below the operation panel, and a tile-dispensing hole opened in the operation panel. When the lifting platform is raised, the mahjong tiles are sent out from the tile-dispensing hole to the table.

[0014] As an optimization, in the aforementioned desktop automatic mahjong machine, a dice-throwing disc is located at the center of the control panel, with the tile-dispensing holes offset from the center and positioned to one side of the dice-throwing disc. This combines a central tile-dispensing structure with a traditional dice-throwing disc structure, satisfying the traditional requirements of mahjong games. The tile-dispensing position and dice-throwing do not interfere with each other, optimizing the layout of the operating space.

[0015] Furthermore, in the aforementioned desktop automatic mahjong machine, the shuffling mechanism includes a shuffling turntable and a turntable drive motor. The shuffling turntable is rotatably disposed inside the shuffling drum. The shuffling turntable is provided with a coaxial external gear ring. The turntable drive motor drives the shuffling turntable to rotate through a transmission gear meshing with the external gear ring.

[0016] As an optimization, in the aforementioned desktop automatic mahjong machine, several rotatable side wheels are arranged around the periphery of the shuffling turntable within the machine body. Each side wheel has an annular groove around its outer circumference, and the outer edge of the shuffling turntable rotatably engages with the annular grooves of all the side wheels. The side wheels provide stable support and guidance for the shuffling turntable, reducing its swaying and vibration, and ensuring smooth operation. Simultaneously, the side wheels act as bearings, cleverly avoiding the need for a traditional rotating bearing at the center of the shuffling turntable. This solves the structural conflict caused by the card-lifting mechanism occupying the central position, achieving a centerless bearing design for the shuffling turntable and optimizing the spatial layout.

[0017] As an optimization, the aforementioned desktop automatic mahjong machine also includes a table frame. The mahjong main unit is placed inside the table frame, with support plates at each of the four corners. The main unit also has upward-recessed mounting grooves at each of the four corners, matching the shape of the support plates. The main unit is supported on the four support plates within the table frame via these mounting grooves. The base plate of the main unit is a single-piece structure, with its four sides fixed to the machine casing by bolts. A bottom cover plate is provided at the bottom opening of the mounting groove, engaging with the four corners of the base plate and being fixedly connected to the support plates and the main unit by bolts. The table frame enhances the overall aesthetics, and table legs can be added separately to form an independent mahjong table, or it can be placed directly on other tabletops for use, meeting the needs of different scenarios. The integrated base plate structure facilitates processing and installation, while the coordinated design of the mounting grooves and bottom cover plate ensures a stable connection between the main unit and the table frame, as well as convenient installation and disassembly.

[0018] The beneficial effects of this utility model are:

[0019] 1. By setting at least two card return holes on the tabletop, the problem of inconvenience in the traditional central card return operation is solved, allowing players to push mahjong tiles into the card return holes nearby, which conforms to the ergonomic principle and improves the user experience; at the same time, the distributed card return design avoids the phenomenon of card return crowding, and also makes the mahjong tiles more evenly distributed after falling into the shuffling bucket, improving the shuffling effect and efficiency.

[0020] 2. By separating the tile-lifting mechanism from the tile-returning hole, the risk of the tiles interfering with the tile-lifting mechanism when falling back is avoided, improving the reliability of the device and the smoothness of the game, and enhancing the user experience;

[0021] 3. Each card return hole is equipped with an opening and closing mechanism, which can be opened at the end of the game and closed during the game to effectively prevent mahjong tiles from accidentally entering the card return hole;

[0022] 4. The overall design combines a central card-playing and dispersed card-returning structure, which maintains the characteristics of lightweight body, clean desktop, and anti-cheating, while improving the convenience of user operation. Attached Figure Description

[0023] Figure 1 The structure of this utility model embodiment Figure 1 .

[0024] Figure 2 The structure of this utility model embodiment Figure 2 .

[0025] Figure 3 This is an exploded structural diagram of an embodiment of the present invention.

[0026] Figure 4 This is a diagonal cross-sectional view of an embodiment of the present invention.

[0027] Figure 5 This is an exploded structural diagram of the mahjong host in an embodiment of this utility model.

[0028] Figure 6 This is an assembly structure diagram of the opening and closing mechanism and the upper cover of the machine body in an embodiment of this utility model.

[0029] Figure 7 This is a structural diagram of the shuffling mechanism in an embodiment of this utility model.

[0030] Figure 8 The structure of the card-picking and conveying mechanism in this embodiment of the utility model Figure 1 .

[0031] Figure 9 The structure of the card-picking and conveying mechanism in this embodiment of the utility model Figure 2 .

[0032] Figure 10 This is an internal structural diagram of the conveying unit in an embodiment of this utility model.

[0033] Figure 11 This is an assembly structure diagram of the lifting plate mechanism and the operation panel in an embodiment of this utility model.

[0034] Figure 12 This is a cross-sectional view of the lifting mechanism and the control panel in an embodiment of this utility model.

[0035] In the picture, 100 represents a mahjong tile;

[0036] 1. Table frame; 11. Support plate;

[0037] 2. Desktop panel; 21. Card return hole;

[0038] 3. Mahjong main unit; 30. Machine body; 31. Top cover; 311. Card drop hole; 32. Machine casing; 321. Through hole; 33. Base plate; 34. Shuffling barrel; 35. Corner mounting cavity; 36. Mounting groove; 37. Bottom cover plate; 38. Push-up cavity shell; 381. Lifting guide cavity; 39. Central cavity;

[0039] 4. Shuffling mechanism; 41. Shuffling turntable; 411. External gear ring; 412. Through hole; 42. Turntable drive motor; 43. Transmission gear; 44. Side wheel;

[0040] 5. Card picking and conveying mechanism; 50. Conveying unit; 51. Card suction wheel; 52. Conveyor belt; 53. Conveyor drive motor; 54. Driven wheel; 55. Tensioner wheel; 56. Conveyor track;

[0041] 6. Pushing plate mechanism; 61. Lifting platform; 62. Lifting drive motor; 63. Lifting swing arm;

[0042] 7. Control panel; 71. Panel holder; 72. Circuit board; 73. Control panel; 74. Control keys; 75. Card dispensing hole; 76. Dice rolling plate; 77. Guide channel; 78. Card inlet;

[0043] 8. Opening and closing mechanism; 81. Guide rail; 82. Baffle; 83. Opening and closing drive motor; 84. Opening and closing swing arm. Detailed Implementation

[0044] The present invention will now be further described in conjunction with the accompanying drawings and embodiments:

[0045] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this utility model, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] like Figure 1 and Figure 2 As shown, the desktop automatic mahjong machine provided in this embodiment is an automatic mahjong machine with a central area for playing cards. It includes a table frame 1, a mahjong host 3 set in the table frame 1, and a desktop panel 2 covering the mahjong host 3. In specific implementation, the table frame 1, the mahjong host 3, and the desktop panel 2 can be said to be separate assembly relationships or they can be an integrated structure.

[0047] like Figure 4 and Figure 5 As shown, the mahjong host 3 includes a body 30 with a shuffling tank 34, a control system, and a shuffling mechanism 4, a card picking and conveying mechanism 5, and a card pushing mechanism 6, all controlled by the control system and installed within the body 30. It also includes an operation panel 7 located in the center of the body 30. The card pushing mechanism 6 is located in the central area of ​​the body 30 and is installed below the operation panel 7. Mahjong tiles 100 are transported from the shuffling mechanism 4 to the card picking and conveying mechanism 5 and then pushed by the card pushing mechanism 6 to the central area of ​​the tabletop 2 for players to pick up.

[0048] like Figure 4 and Figure 5 As shown, in this embodiment, the body 30 includes an upper cover 31, a housing 32, and a bottom plate 33 that are fixedly connected together from top to bottom. The housing 32 has a through hole 321 in the middle. The inner peripheral wall of the through hole 321 is connected to the downward protruding part of the lower surface of the upper cover 31. Together with the bottom plate 33, they form the shuffling drum 34 space of the body 30. At the same time, four corner mounting cavities 35 are formed in the four corner areas between the upper cover 31 and the housing 32, providing sufficient layout space for each functional component. The layout structure will be further described later.

[0049] like Figure 2 , Figure 3 and Figure 5 As shown, support plates 11 are provided at the four corners of the table frame 1, and mounting grooves 36 with upward indentation are provided at the four corners of the body 30. The mounting grooves 36 match the shape of the support plates 11. The body 30 is supported on the four support plates 11 in the table frame 1 through the mounting grooves 36 and fixed with bolts. In this embodiment, the four mounting grooves 36 are formed at the four corners of the housing 32, and notches matching the support plates 11 are also formed at the four corners of the bottom plate 33. The base plate 33 is an integral structure. The four sides of the base plate 33 are fixedly connected to the housing 32 by bolts. In order to further enhance the structural stability, the bottom groove of the mounting groove 36 is also provided with a bottom cover plate 37. The bottom cover plate 37 is engaged with the four corners of the base plate 33 and is fixedly connected to the support plate 11 and the housing 30 by bolts. In this embodiment, the mounting groove 36, the support plate 11 and the bottom cover plate 37 are all right-angled triangular structures. The sloping side of the bottom cover plate 37 is engaged with the edge of the four corner notches of the base plate 33. The two right-angled sides are close to the inner side wall of the table frame 1. Then, bolts are inserted from the bottom and fixedly connected to the support plate 11 and the housing 30 to form a stable mounting connection structure.

[0050] like Figure 1 , Figure 2 and Figure 6As shown, to improve the convenience of card return operations and user experience, the tabletop 2 has at least two card return holes 21 connected to the shuffling drum 34. The card return holes 21 are evenly distributed around the center of the tabletop 2. In this embodiment, considering the convenience of card return for each player and the aesthetics of the tabletop, the number of card return holes 21 is preferably two. The two card return holes 21 are symmetrically distributed on a diagonal line of the tabletop 2 with respect to the center of the tabletop 2. The bottom of the tabletop 2 is provided with an opening and closing mechanism 8 corresponding to each card return hole 21. The opening and closing mechanism 8 includes a fixedly installed guide rail 81 and a baffle 82 slidably connected to the guide rail 81. The baffle 82 moves back and forth along the guide rail 81 to open or close the card return hole 21. The card return hole 21 is opened at the end of the game and closed during the game. The design of two card return holes 21 allows players to push mahjong tiles 100 into the return holes 21 from the nearest point, which conforms to the ergonomic principle and improves the user experience. Especially for mahjong machines that play tiles in the central area, the dispersed card return avoids the risk of interfering with the tile pushing mechanism 6 when returning tiles from the center, thus improving the reliability of the device and the smoothness of the game.

[0051] The return hole 21 is preferably circular, and the corresponding baffle 82 has an arc-shaped notch with a radius equal to or greater than the radius of the return hole 21. This design allows the baffle 82 to fully expose the return hole 21 when open, reduces the required movement distance of the baffle 82, and improves the working efficiency and reliability of the opening and closing mechanism 8. In specific implementation, the movement of the baffle 82 can be manually operated or electrically driven. In this embodiment, an electric structure is preferred: the opening and closing mechanism 8 also includes an opening and closing drive motor 83 and an opening and closing swing rod 84. The two opening and closing drive motors 83 are respectively installed in the two corner mounting cavities 35 located on the diagonal of the return hole 21 formed by the upper cover 31 and the housing 32. One end of the opening and closing swing rod 84 is fixedly connected to the motor shaft of the opening and closing drive motor 83, and the other end is connected to the baffle 82. The action of the opening and closing drive motor 83 can drive the opening and closing swing rod 84 to swing in the horizontal plane to move the baffle 82 along the guide rail 81.

[0052] The tabletop panel 2 is mounted on the upper cover 31 of the body 30. The upper cover 31 has card drop holes 311 on its surface, corresponding in number and position to the card return holes 21 on the tabletop panel 2. The coverage area of ​​the card drop holes 311 is equal to or larger than the card return holes 21. The mahjong tiles 100 on the tabletop panel 2 fall back into the shuffling bin 34 through the card return holes 21 and the card drop holes 311. The guide rail 81 of the opening and closing mechanism 8 is fixedly mounted below the upper cover 31. The upper surface of the baffle 82 is attached to the lower surface of the upper cover 31. The reciprocating movement of the baffle 82 simultaneously opens or closes the card return holes 21 and the card drop holes 311. In other embodiments, the upper cover 31 can also be an integral structure with the tabletop panel 2, in which case the additional card drop holes 311 are not required, and the upper surface of the baffle 82 directly attaches to the lower surface of the tabletop panel 2.

[0053] like Figure 4 and Figure 7 As shown, the shuffling mechanism 4 includes a shuffling turntable 41 and a turntable drive motor 42. The shuffling turntable 41 is rotatably disposed inside the shuffling drum 34. The shuffling turntable 41 is provided with a coaxial external gear ring 411. The external gear ring 411 is preferably placed around the bottom periphery of the shuffling turntable 41. The radius of the tooth tip circle of the external gear ring 411 is less than or equal to the radius of the shuffling turntable 41. The turntable drive motor 42 drives the shuffling turntable 41 to rotate through a transmission gear 43 that meshes with the external gear ring 411. Since the card-lifting mechanism 6 is located in the central area of ​​the body 30, the shuffling turntable 41 adopts a design without a central bearing to avoid structural conflicts. A through hole 412 is opened in the center of the shuffling turntable 41, through which the card-lifting mechanism 6 passes without interfering with the shuffling turntable 41. Several rotatable side wheels 44 are arranged around the periphery of the shuffling turntable 41 in the body 30. The outer circumference of the side wheels 44 is provided with a ring groove. The outer edge of the shuffling turntable 41 rotatably fits into the ring groove of all the side wheels 44. The side wheels 44 act as bearings, providing stable support and rotation guidance for the shuffling turntable 41. The aforementioned transmission gear 43 and side wheels 44 are all installed around the shuffling turntable 41 between the housing 32 and the base plate 33. The aforementioned turntable drive motor 42 is installed in a corner mounting cavity 35, which is different from the opening and closing drive motor 83. Its output shaft passes downward through the housing 32 and is fixedly connected to the transmission gear 43.

[0054] like Figures 8-12 As shown, the tile-picking and conveying mechanism 5 includes at least one set of conveying units 50. Each conveying unit 50 includes a tile-collecting wheel 51, a conveyor belt 52, and a conveyor drive motor 53. The tile-collecting wheel 51 is disposed inside the shuffling tank 34 and is used to collect the mahjong tiles 100 inside the shuffling tank 34. The tile-collecting wheel 51 is driven to rotate by the conveyor drive motor 53. The input end of the conveyor belt 52 is wrapped around the tile-collecting wheel 51, and the output end is connected to the tile-lifting mechanism 6, conveying the mahjong tiles 100 collected by the tile-collecting wheel 51 to the tile-lifting mechanism 6. The tile-lifting mechanism 6 includes a lifting platform 61 and a lifting drive unit that drives the lifting platform 61 to reciprocate up and down. The output end of the conveyor belt 52 corresponds to the lifting platform 61. When the lifting platform 61 descends, its surface receives the mahjong tiles 100 from the conveyor belt 52; when it rises, it pushes the mahjong tiles 100 onto the tabletop.

[0055] Because the existing card-drawing habit is that at the beginning of the game, players draw four cards at a time, and then draw cards one by one, in this embodiment, in order to meet the existing card-drawing habit, the platform of the lifting platform 61 is divided into two adjacent mahjong tile positions, so that the mahjong tiles 100 can form a stacking effect of two pairs stacked to four on the platform. The card-picking and conveying mechanism 5 is also equipped with two sets of conveying units 50. The conveyor belts 52 of the two sets of conveying units 50 correspond to the two mahjong tile positions respectively. The two sets of conveying units 50 simultaneously convey mahjong tiles 100 to the lifting platform 61, improving the card-playing efficiency. In this embodiment, considering the ease of installation of the conveyor drive motor 53 and the need to avoid interference with the opening and closing mechanism 8 of the card return hole 21, the conveyor unit 50 is arranged along another diagonal line intersecting the diagonal line of the card return hole 21. Specifically, the card suction wheel 51 is located above the edge of the shuffling turntable 41, and its axis of rotation is set parallel to the tangent direction of the shuffling turntable 41. The conveyor belt 52 is arranged radially. The mahjong tiles 100 picked up by the card suction wheel 51 are directly conveyed to the lifting platform 61 by the conveyor belt 52 along the radial path. This structure of the conveyor unit 50 avoids the need for traditional designs. The complex mechanism of the steering conveyor reduces the number of failure points and maintenance difficulties. The output end of the conveyor belt 52 is wound around a driven wheel 54, and an adjustable tension wheel 55 can also be set to adjust the tension of the conveyor belt 52 to ensure the reliability of the conveying process. In order to ensure that the mahjong tiles 100 on the conveyor belt 52 move in an orderly manner along the direction of the conveyor belt 52 without falling off, the conveying unit 50 is also equipped with a conveying track 56 that connects the tile suction wheel 51 and the tile pushing mechanism 6. The conveyor belt 52 passes through the conveying track 56, and the driven wheel 54 and the tension wheel 55 can both be installed on the conveying track 56. In this embodiment, the two conveyor belts 52 are preferably arranged in parallel and adjacent positions. This allows the two conveyor drive motors 53 to be installed together in the remaining corner mounting cavity 35 without conflicting with the installation position of the turntable drive motor 42. At the same time, the parallel and adjacent arrangement makes it possible to integrate the structure of the card suction wheel 51, conveyor belt 52, conveyor track 56, driven wheel 54, tension wheel 55 and other structures in the two sets of conveyor units 50. Only one conveyor drive motor 53 can also be provided, thereby further simplifying the structure.

[0056] A lifting chamber shell 38 is provided in the central area of ​​the machine body 30. The lifting chamber shell 38 passes through the through hole 412 of the shuffling turntable 41. Its bottom is fixedly connected to the bottom plate 33 of the machine body 30, and its top is fixedly connected to the operating plate 7. The card lifting mechanism 6 is installed in the lifting chamber shell 38. A lifting guide cavity 381 that matches the shape of the lifting platform 61 is formed inside the lifting chamber shell 38. The lifting platform 61 can slide up and down in the lifting guide cavity 381. The lifting drive unit includes a lifting drive motor 62 and a lifting swing rod 63. The lifting drive motor 62 is fixedly installed in the lifting chamber shell 38. One end of the lifting swing rod 63 is fixedly connected to the motor shaft of the lifting drive motor 62, and the other end is connected to the lifting platform 61. The operation of the lifting drive motor 62 can drive the lifting swing rod 63 to swing in the vertical plane to move the lifting platform 61 up and down.

[0057] In actual use, the lifting platform 61, controlled by the control system, has three positions: high, medium, and low. When four tiles are needed, the lifting platform 61 lowers to the low position, and two sets of conveyor units 50 simultaneously supply tiles to both mahjong tile positions, stacking two tiles on each side. The lifting platform 61 is then full of four tiles. After this, the lifting platform 61 rises to the high position, exposing the mahjong tiles 100 on the table for the player to use. When stacking mahjong tiles is not needed (i.e., two tiles at a time or one tile at a time), the lifting platform 61 lowers to the medium position, and two conveyor units 50 supply tiles simultaneously or a single conveyor unit 50 supplies tiles. After two tiles or one tile are laid flat on the lifting platform 61, it rises to the high position again, exposing the mahjong tiles 100 on the table for the player to use. When the player has taken all the tiles, if the sensor on the lifting platform 61 detects that there are no tiles, the lifting platform 61 will lower back to the low or medium position to receive mahjong tiles 100 from the conveyor units 50 again. This cycle repeats continuously, ensuring the player can enjoy the mahjong game. It won't affect the speed of drawing cards, and it keeps the table clean and tidy with only the mahjong tiles that have been played, improving the player's card-playing experience and preventing dishonest players from cheating.

[0058] The control panel 7 is fixed on the lifting cavity shell 38 and includes a tray 71, a circuit board 72 disposed within the tray 71, and an operation panel 73 fixed on the tray 71. The operation panel 73 has several control keys 74, which are electrically connected to the circuit board 72. A through hole matching the operation panel 73 is opened in the center of the tabletop 2, and the operation panel 73 is flush with the tabletop 2. A card-dispensing hole 75 is opened at the position corresponding to the lifting platform 61. When the lifting platform 61 is raised, the mahjong tiles 100 are dispensed from the card-dispensing hole 75 onto the tabletop. This embodiment uses a traditional control panel with a dice-throwing disc 76 at the center. Therefore, the card-dispensing hole 75 is off-center and located on one side of the dice-throwing disc 76. Holes are also opened at corresponding positions on the tray 71 and the circuit board 72. A guide channel 77 is also formed inside the control panel 7, which connects with the lifting guide cavity 381 of the lifting cavity shell 38. In other embodiments, the operation panel 7 can also be intelligent, with an electronic dice disk arranged around the center. In this case, the card-dispensing hole 75 is located in the center of the operation panel 7, making it an automatic mahjong machine that dispenses cards from the center. In addition, the side of the tray 71 has a card inlet 78 corresponding to the output end of the conveyor belt 52. The conveying unit 50 delivers the mahjong tiles 100 to the lifting platform 61 through the card inlet 78. Preferably, the peripheral wall of the tray 71 extends downward to connect with the wall of the circular hole 412 of the shuffling turntable 41, thereby forming a relatively closed central cavity 39 in the center of the machine body 30, separating the installation space of the card-lifting mechanism 6 from the shuffling space to avoid mutual interference.

[0059] It is understood that those skilled in the art can make various other corresponding changes and modifications based on the technical concept of this utility model, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A table type automatic mahjong machine, comprising a mahjong main machine and a table top panel, the mahjong main machine comprising a machine body provided with a shuffling barrel, characterized in that: The table top is provided with at least two back card holes communicating with the shuffling barrels, the back card holes are uniformly distributed around the center of the table top, and the lower portion of the table top is provided with an opening and closing mechanism corresponding to each back card hole.

2. The table-top automatic mahjong machine according to claim 1, characterized in that: The number of the back card holes is two, and the two back card holes are symmetrically distributed on a diagonal line of the table top.

3. The table-top automatic mahjong machine according to claim 1, characterized in that: The opening and closing mechanism further comprises an opening and closing driving motor and an opening and closing swing rod, one end of the opening and closing swing rod is fixedly connected with the motor shaft of the opening and closing driving motor, the other end is connected with the baffle, and the opening and closing driving motor can drive the opening and closing swing rod to move the baffle along the guide rail.

4. The table-top automatic mahjong machine according to claim 1 or 2 or 3, characterized in that: The mahjong main machine further comprises a control system, and a shuffling mechanism, a card picking and conveying mechanism and a pushing and lifting mechanism which are installed in the machine body and controlled by the control system, the pushing and lifting mechanism is located in the central region of the machine body, the mahjong tiles are conveyed from the shuffling mechanism to the pushing and lifting mechanism through the card picking and conveying mechanism, and then pushed to the central region of the table top by the pushing and lifting mechanism. The card picking and conveying mechanism comprises at least one set of conveying units, the conveying unit comprises a card sucking wheel, a conveying belt and a conveying driving motor, the card sucking wheel is arranged in the shuffling barrel and driven to rotate by the conveying driving motor, the input end of the conveying belt is arranged outside the card sucking wheel, and the output end is connected with the pushing and lifting mechanism to convey the mahjong tiles sucked by the card sucking wheel to the pushing and lifting mechanism. The pushing and lifting mechanism comprises a lifting platform and a lifting driving unit for driving the lifting platform to reciprocate up and down, the output end of the conveying belt corresponds to the lifting platform, the lifting platform receives the mahjong tiles from the conveying belt when descending, and pushes the mahjong tiles to the table top when rising.

5. The table-top automatic mahjong machine according to claim 4, characterized in that: The lifting platform is divided into two adjacent mahjong tile positions, the card picking and conveying mechanism has two sets of conveying units, and the conveying belts of the two sets of conveying units correspond to the two mahjong tile positions respectively, and the two conveying belts are arranged in parallel and adjacent to each other.

6. The table-top automatic mahjong machine according to claim 4 or 5, characterized in that: The mahjong main machine further comprises a central operation panel, the pushing and lifting mechanism is installed below the operation panel, the operation panel is provided with a tile outlet hole, and the mahjong tiles are sent out from the tile outlet hole to the table top when the lifting platform rises.

7. The table-top automatic mahjong machine according to claim 6, characterized in that: The center of the operation panel is provided with a dice throwing disc, and the tile outlet hole is arranged on one side of the dice throwing disc away from the center.

8. The table-top automatic mahjong machine according to claim 4, characterized in that: The shuffling mechanism comprises a shuffling turntable and a turntable driving motor, the shuffling turntable is rotatably arranged in the shuffling barrel, the shuffling turntable is provided with a coaxial outer gear ring, and the turntable driving motor drives the shuffling turntable to rotate through a transmission gear meshing with the outer gear ring.

9. The table-top automatic mahjong machine according to claim 8, characterized in that: A plurality of rotatable side wheels are arranged around the periphery of the shuffling turntable in the machine body, the outer periphery of the side wheel is provided with a ring groove, and the outer edge of the shuffling turntable is rotatably combined in the ring grooves of all the side wheels.

10. The table-top automatic mahjong machine according to claim 1 or 2 or 3, characterized in that: Also include the table frame, mahjong host is placed in the table frame, the position of four corners in the table frame is equipped with the support plate, the part of four corners of mahjong host body is equipped with the installation slot which is concave upward, the shape of installation slot is matched with the shape of support plate, the body is supported on the four support plates in the table frame through the installation slot; the bottom plate of the body is an integral structure, the four edges of the bottom plate are fixedly connected with the machine shell through bolts, the bottom slot of the installation slot is equipped with the bottom cover plate, the four corner parts of the bottom cover plate are clamped with the bottom plate, and the bottom cover plate is fixedly connected with the support plate and the body through bolts.

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