A tile stacking mechanism and mahjong machine

Abstract

The application discloses a card stacking mechanism and belongs to the field of chess and card game equipment. The card stacking mechanism solves the problem of high production cost caused by too many components in the prior art. The technical solution for solving the problem is that the card stacking wheel is driven by a card stacking motor, the card supporting plate is located between the card receiving plate of the mahjong machine and the end platform of the card feeding track, the card supporting plate has a first position and a second position, the second position is lower than the first position, the swing rod is hinged to the support, the swing rod is movably connected with the card supporting plate, the cam is arranged on the card stacking wheel, the swing rod abuts against the working surface of the cam, the cam rotates along with the card stacking wheel to swing the swing rod, the swing rod drives the card supporting plate to move from the second position to the first position, and the card supporting plate moves from the first position to the second position by gravity. The application mainly reduces the number of components of the card stacking mechanism and reduces the production cost. The application further provides a mahjong machine adopting the card stacking mechanism.

Description

Technical Field

[0001] This invention relates to card and board game equipment, and in particular to a card stacking mechanism and a mahjong machine. Background Technology

[0002] In existing mahjong machines, the stacking mechanism is used to arrange the shuffled mahjong tiles in a stacking order of two tiles at a time. For example, CN110721464A invention patent application discloses a stacking and pushing device, which specifically discloses a tile holder (1), a lifting slider (2), a pushing head (5), a pushing slider (4), and a reciprocating mechanism that drives the lifting slider to move up and down while simultaneously driving the pushing slider to reciprocate. The tile holder (1) is fixed on the lifting slider (2). The tile holder (1) rises to receive the first mahjong tile and falls to receive the second mahjong tile, which is then stacked on top of the first mahjong tile. One of the positions of the mahjong tiles stacked on the tile holder (1) as the lifting slider (2) rises and falls is also connected to the pushing head (5). Align the pusher head (5) with the pusher head (6) or the transition slope (61). The pusher head (5) is fixedly connected to the pusher slider (4). The pusher slider (4) is provided with a guide groove (41) that is connected to the reciprocating mechanism. The reciprocating mechanism drives the pusher slider (4) and the pusher head (5) through the guide groove (41). A support slope (100) is provided on the top of the support seat facing the direction of falling to receive the mahjong tiles. The height of the support slope (100) reduces the drop of the mahjong tiles when they fall. The guide groove (41) is provided with an elastic buffer structure in the area where the pusher head (5) contacts and pushes the mahjong tiles.CN103861282A invention patent application discloses a stacking and pushing tile system for a mahjong machine, which specifically discloses a machine head box (1), a motor frame (2), a motor (3), a tile pushing groove wheel (4), a swing plate (5), a vertical slide bar (6), a vertical slider (7), a tile receiving seat connecting rod (8), a tile receiving seat (9), a horizontal slide bar (10), a horizontal slider (11), a tile pushing head connecting rod (12), a tile pushing head (13), and a tile blocking seat (14); the machine head box (1) The machine head box (1) is open on one side, and the motor frame (2) is fixed to the open end of the machine head box (1); the motor (3) is fixed to the outside of the motor frame (2), and the output shaft of the motor (3) passes through the motor frame (2); the pusher wheel (4), the swing plate (5), the vertical slide bar (6), the vertical slider (7), the horizontal slide bar (10), and the horizontal slider (11) are arranged inside the machine head box (1); the pusher wheel (4) is fixed on the output shaft of the motor (3); the pusher wheel (4) drives the swing plate on one side. (5) Drive the vertical slide bar (6) to move up and down, and drive the horizontal slide bar (10) to move horizontally; the two ends of the vertical slide bar (6) are respectively installed on the top and bottom of the head box (1); the vertical slider (7) is slidably connected to the vertical slide bar (6); the two ends of the horizontal slide bar (10) are respectively installed on both sides of the head box (1); the horizontal slider (11) is slidably connected to the horizontal slide bar (10); the top surface and one side of the head box (1) are respectively provided with a A through slot; the card receiving seat connecting rod (8) passes through the through slot on the side of the head box (1), and its two ends are fixedly connected to the vertical slider (7) and the card receiving seat (9) respectively; the card pushing head connecting rod (2) passes through the through slot on the top surface of the head box (1), and its two ends are fixedly connected to the horizontal slider (11) and the card pushing head (3) respectively; the card blocking seat (4) is set close to the card receiving seat (9); one side of the card receiving seat (9) is close to the card outlet of the mahjong machine conveying mechanism, and the other side is close to the card blocking seat (4). Both of the above patent applications disclose that the card receiving seat (1) or the card receiving seat (9) is vertically lifted and lowered by a reciprocating mechanism driven by a motor. Therefore, it is necessary to guide and limit the movement direction of the card receiving seat (1) or the card receiving seat (9), such as lifting guide column (22) or vertical slide bar (6), otherwise reliable lifting and lowering movement cannot be achieved. This results in too many parts in the card stacking mechanism, complicated structure, increased assembly process steps, low assembly efficiency, and increased production cost. Summary of the Invention

[0003] The purpose of this invention is to provide a card stacking mechanism that reduces the number of parts, simplifies the structure, and lowers production costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a card stacking mechanism, comprising a card stacking motor, a card stacking wheel, a card support plate, and a swing rod. The card stacking wheel is driven by the card stacking motor. The card support plate is located between the card receiving plate of the mahjong machine and the end platform of the card feeding rail. The card support plate is hinged to the card receiving plate or a bracket. The card support plate has a first position flush with the card receiving plate and a second position for receiving a second mahjong tile. The second position is lower than the first position. The swing rod is hinged to the bracket and movably connected to the card support plate. A cam is provided on the card stacking wheel. The swing rod abuts against the working surface of the cam. The cam follows the rotation of the card stacking wheel to make the swing rod swing. The swing rod drives the card support plate to move from the second position to the first position. The card support plate moves from the first position to the second position by gravity.

[0005] Furthermore, the end platform of the card-feeding rail is higher than the card-bearing surface of the card-bearing plate, so that the mahjong tiles on the end platform of the card-feeding rail can move forward and push the two mahjong tiles stacked on the card-bearing plate onto the card-bearing plate.

[0006] Furthermore, the card-holding plate has a third position, which is located between the first position and the second position. When the card-holding plate receives the second mahjong tile, it moves to the third position so that the second mahjong tile moves onto the first mahjong tile with the top surface of the first mahjong tile attached to it. The working surface of the cam includes a first driving surface that moves the card-holding plate from the second position to the third position and then back to the second position.

[0007] Furthermore, the working surface of the cam includes a first arcuate surface that holds the plate in a first position and a second driving surface that swings the plate from the first position to a second position.

[0008] Furthermore, the working surface of the cam includes a second arcuate surface that holds the plate in the second position and a third driving surface that swings the plate from the second position to the first position.

[0009] Furthermore, the second arc surface includes a longer segment and a shorter segment, the longer segment being located between the first driving surface and the second driving surface, and the shorter segment being located between the first driving surface and the third driving surface.

[0010] Furthermore, the rocker arm is provided with a first roller that contacts the working surface of the cam.

[0011] Furthermore, the swing arm extends below the plate to support the plate, and a second roller is provided on the swing arm to contact the plate.

[0012] Furthermore, the stacking wheel is provided with a laterally extending pusher rod on its side, and the mahjong tiles on the end platform of the feeding rail are located on the rotation trajectory of the pusher rod. The stacking wheel is connected to the output shaft of the stacking motor.

[0013] A mahjong machine includes a frame and a stacking mechanism, a pusher plate, and a lifter plate mounted on the frame. The stacking mechanism is any of the aforementioned stacking mechanisms. The pusher plate is located above the support plate and extends above the holder plate. The lifter plate is located inside the support plate.

[0014] After adopting the above technical solution, the present invention has the following advantages: The plate holder is hinged to the plate support or bracket. Utilizing the guiding and limiting effect of the hinge structure itself, the plate holder can swing on a stable vertical plane to achieve two different height position changes. Therefore, there is no need to set up a corresponding guiding structure. Since the cam and the plate holder directly transmit power through the rocker arm, and the rocker arm only needs to drive the plate holder to overcome gravity and move from the second position to the first position, and the plate holder moves from the first position to the second position by gravity, there is no need to consider setting up a structure to drive the plate holder to reciprocate. This greatly simplifies the power transmission structure, significantly reduces the number of parts, naturally improves assembly efficiency, and effectively reduces production costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a mahjong machine according to the present invention;

[0017] Figure 2 This is a top view of a mahjong machine according to the present invention (showing part of the internal structure);

[0018] Figure 3 for Figure 2 Enlarged view of point I in the middle;

[0019] Figure 4 This is a schematic diagram (I) of a stacking mechanism according to Embodiment 1 of the present invention;

[0020] Figure 5 This is a schematic diagram (II) of a stacking mechanism according to Embodiment 1 of the present invention;

[0021] Figure 6 This is a schematic diagram (III) of a stacking mechanism according to Embodiment 1 of the present invention;

[0022] Figure 7 This is a schematic diagram of the card stacking wheel in Embodiment 1 of the present invention (showing the cam);

[0023] Figure 8 This is a schematic diagram showing the plate in the second position in Embodiment 1 of the present invention;

[0024] Figure 9 for Figure 8 Rear view;

[0025] Figure 10This is a schematic diagram of the second mahjong tile about to be stacked on top of the first mahjong tile in Embodiment 1 of the present invention;

[0026] Figure 11 for Figure 10 Rear view;

[0027] Figure 12 This is a schematic diagram showing the plate holder moving to the third position in Embodiment 1 of the present invention;

[0028] Figure 13 for Figure 12 Rear view;

[0029] Figure 14 This is a schematic diagram of the second mahjong tile being stacked on top of the first mahjong tile in Embodiment 1 of the present invention;

[0030] Figure 15 for Figure 14 Rear view;

[0031] Figure 16 This is a schematic diagram of the plate holder in the first position in Embodiment 1 of the present invention;

[0032] Figure 17 for Figure 16 Rear view;

[0033] Figure 18 This is a schematic diagram of pushing stacked mahjong tiles onto a tile-receiving plate in Embodiment 1 of the present invention;

[0034] Figure 19 for Figure 18 Rear view;

[0035] Figure 20 This is a schematic diagram of the plate returning to the second position in Embodiment 1 of the present invention;

[0036] Figure 21 for Figure 20 Rear view. Detailed Implementation

[0037] Example 1:

[0038] This invention provides a card stacking mechanism, such as Figures 2 to 6As shown, the device includes a stacking motor 1, a stacking wheel 2, a card support plate 3, and a swing rod 4. The stacking wheel 2 is driven by the stacking motor 1. The card support plate 3 is located between the card support plate 5 and the end platform 61 of the card feeding rail 6 of the mahjong machine. The card support plate 3 is hinged to the card support plate 5. The card support plate 3 has a first position flush with the card support plate 5 and a second position for receiving the second mahjong tile M2. The second position is lower than the first position. The swing rod 4 is hinged to the bracket 7 and is movably connected to the card support plate 3. The stacking wheel 2 is provided with a cam 21. The swing rod 4 abuts against the working surface of the cam 21. The cam 21 rotates with the stacking wheel 2, causing the swing rod 4 to swing. The swing rod 4 drives the card support plate 3 to move from the second position to the first position. The card support plate 3 moves from the first position to the second position by gravity.

[0039] In this invention, the plate holder 3 is hinged to the plate support 5 or the bracket 7. Utilizing the inherent guiding and limiting function of the hinge structure, the plate holder 3 can swing on a stable vertical plane, achieving positional changes at two different heights. Therefore, there is no need to set up a corresponding guiding structure. Since the cam 21 and the plate holder 3 directly transmit power through the rocker arm 4, and the rocker arm 4 only needs to drive the plate holder 3 to overcome gravity and move from the second position to the first position, and the plate holder 3 moves from the first position to the second position by gravity, there is no need to consider setting up a structure to drive the plate holder 3 to reciprocate. This greatly simplifies the power transmission structure, significantly reduces the number of parts, naturally improves assembly efficiency, and effectively reduces production costs.

[0040] The placard support plate 3 and the placard holder plate 5 being flush means that the top surface of the placard support plate 3 is flush with the placard-holding surface 51 (generally also the top surface) of the placard holder plate 5. In this embodiment, since the placard support plate 3 and the placard holder plate 5 together bear the placard, the placard support plate 3 is hinged to the placard holder plate 5. With the placard holder plate 5 as a reference, when the placard support plate 3 is in the first position, the top surface of the placard support plate 3 and the placard holder plate 5 can be better kept flush. It is understandable that the placard support plate 3 can also be hinged to the bracket 7.

[0041] Since the card holder 3 only needs to move up and down, the simplest solution is to set the cam 21 vertically and drive the rocker arm 4 to swing up and down through rotation. Accordingly, it is best to set the card stacking wheel 2 vertically.

[0042] To briefly explain, in this invention, a full rotation of cam 21 allows two mahjong tiles to be stacked and pushed onto the tile-holding plate 5. The first mahjong tile M1 refers to the lower tile of the stacked tiles, and the second mahjong tile M2 refers to the upper tile of the stacked tiles. Figure 20 and Figure 21 You can see two mahjong tiles stacked neatly.

[0043] In existing technology, to push two stacked mahjong tiles onto the receiving plate 5, a pusher head is generally installed. The pusher head moves horizontally to push the stacked mahjong tiles, as mentioned in the two invention patents in the background art. It is understood that the present invention can also use a pusher head structure to push the two stacked mahjong tiles onto the receiving plate 5. Since using a pusher head structure would further complicate the structure of the stacking mechanism, in this embodiment, to reduce the structure required for pushing the tiles, the stacked mahjong tiles are pushed onto the receiving plate 5 using subsequently fed mahjong tiles. For this purpose, the end platform 61 of the feeding rail 6 is designed to be higher than the receiving surface 51 of the receiving plate 5, so that the mahjong tiles on the end platform 61 of the feeding rail 6 can move forward and push the two stacked mahjong tiles on the receiving plate 3 onto the receiving plate 5. Figure 8 and Figure 12 As the dotted lines show, the so-called forward movement here refers to the direction of movement of the mahjong tiles, which can be understood as... Figure 16 and Figure 18 From left to right, the process of the first mahjong tile M1 pushing the two stacked mahjong tiles can be referenced. Figures 16 to 21 .

[0044] During the stacking process, when the support plate 3 is in the second position, the first mahjong tile M1 on the support plate 3 is placed at an angle. There is a certain height difference between the second mahjong tile M2 and the first mahjong tile M1 on the support plate 3. If the second mahjong tile M2 is directly pushed onto the first mahjong tile M1, the second mahjong tile M2 will fall onto the first mahjong tile M1, thus generating noise from the collision of mahjong tiles. To eliminate this noise, the support plate 3 can be designed to have a third position, located between the first and second positions. When the support plate 3 receives the second mahjong tile M2, it moves to the third position so that the second mahjong tile M2 moves onto the first mahjong tile M1 while touching the top surface of the first mahjong tile M1. When the center of gravity of the second mahjong tile M2 has shifted to above the first mahjong tile M1, and with the stable support of the first mahjong tile M1, the support plate 3, in coordination with the movement of the second mahjong tile M2, returns to the second position. To achieve this action, combined with... Figure 7 See, the working surface of cam 21 can be designed to include a first driving surface 211 that moves the tile-supporting plate 3 from the second position to the third position and back to the second position. During the movement of the second mahjong tile M2 and the shift of its center of gravity from above the end platform of the tile-feeding rail to above the first mahjong tile M1, the first mahjong tile M1 acts as a support, allowing the second mahjong tile M2 to move along the top surface of the first mahjong tile M1 for stacking. This prevents the second mahjong tile M2 from falling, thus eliminating the noise of tile collisions and improving the stability and reliability of the two mahjong tiles during stacking. The tile-supporting plate 3 returning from the third position to the second position ensures that the second mahjong tile M2 is pushed, not the first mahjong tile M1.

[0045] To keep the plate holder 3 in the first position for a period of time, the working surface of the cam 21 can be designed to include a first arcuate surface 212 that keeps the plate holder 3 in the first position. To move the plate holder 3 from the first position to the second position, the working surface of the cam 21 can be designed to include a second driving surface 213 that swings the plate holder 3 from the first position to the second position. Similarly, to keep the plate holder 3 in the second position for a period of time, the working surface of the cam 21 can be designed to include a second arcuate surface that keeps the plate holder 3 in the second position. To swing the plate holder 3 from the second position to the first position, the working surface of the cam 21 can be designed to include a third driving surface 215. Because it is necessary to ensure that the second mahjong tile M2 is pushed onto the first mahjong tile M1 so that the two mahjong tiles are aligned, the tile support plate 3 needs to remain in the second position for a period of time after returning from the third position. Therefore, the second arc surface includes a longer segment 2141 and a shorter segment 2142. The longer segment 2141 is located between the first driving surface 211 and the second driving surface 213, and the shorter segment 2142 is located between the first driving surface 211 and the third driving surface 215.

[0046] The rocker arm 4 can slide directly on the working surface of the cam 21, or a first roller 41 that contacts the working surface of the cam 21 can be provided on the rocker arm 4 to make the movement of the rocker arm 4 relative to the working surface of the cam 21 smoother and reduce frictional resistance.

[0047] Since the swing arm 4 only needs to drive the plate 3 to swing against gravity, the movable connection between the swing arm 4 and the plate 3 can be in the simplest way, as long as the two are in physical contact. Specifically, the swing arm 4 extends to the bottom of the plate 3 to support the plate 3. In order to reduce the frictional resistance between the swing arm 4 and the plate 3, a second roller 42 that contacts the plate 3 can be provided on the swing arm 4.

[0048] In this embodiment, the card-bearing surfaces 51 of the card-supporting plate 3 and the card-holding plate 5 are aligned with the end platform 61 of the card-feeding rail 6. Due to the limited space inside the mahjong machine, the card-feeding direction of the card-feeding rail 6 is perpendicular to the direction of movement of the mahjong tiles during stacking. After the mahjong tiles reach the end platform 61 of the card-feeding rail 6, they must change direction to continue moving. Therefore, additional power is needed to push the mahjong tiles on the end platform 61 of the card-feeding rail 6. In this embodiment, this is achieved through the stacking wheel 2. Specifically, the stacking wheel 2 has a laterally extending push rod 22 on its side. The mahjong tiles on the end platform 61 of the card-feeding rail 6 are located on the rotation trajectory of the push rod 22. The stacking wheel 2 is connected to the output shaft of the stacking motor 1 via a drive. In this embodiment, a synchronous belt is used to achieve the drive connection between the stacking wheel 2 and the stacking motor 1. The stacking wheel 2 is configured as a synchronous pulley, and an active synchronous pulley 11 is also provided on the output shaft of the stacking motor 1. In this embodiment, the stacking wheel 2 and cam 21 rotate one revolution, which pushes two mahjong tiles to complete one stacking operation. Therefore, there are two pusher rods 22, evenly distributed on the stacking wheel 2. Generally speaking, if the rotation angle A of cam 21 can achieve one stacking operation, then the number of pusher rods 22 is 720 / A. For example, if cam 21 rotates 240 degrees to achieve one stacking operation, then there are 3 pusher rods 22; if cam 21 rotates 180 degrees to achieve one stacking operation, then there are 4 pusher rods 22; and if cam 21 rotates 120 degrees to achieve one stacking operation, then there are 6 pusher rods 22. The smaller A is, the larger the size of cam 21 will be. Therefore, it is generally recommended to adopt the scheme of this embodiment, which is beneficial for the miniaturization of the stacking mechanism. To avoid interference between the pusher rods 22 and the swing rod 4, cam 21 can be designed to be located on the other side of the stacking wheel 2. If space permits, a curved track can be installed at the end of the card-feeding track 6 for the movement of the mahjong tiles. The power to push the mahjong tiles and stack them can then be provided by the transport of the mahjong tiles on the card-feeding track 6. Alternatively, if the pusher rod 22 and the cam 21 are installed separately, for example, if the pusher rod 22 is installed on a pusher wheel and the speed ratio of the pusher wheel to the stacking wheel 2 is 2:1, then only one pusher rod 22 needs to be installed.

[0049] The stacking motor 1 can be fixed on the bracket 7 or installed on the frame of the mahjong machine.

[0050] According to the order of the stacked cards, combined Figures 8 to 21 Let me explain in detail.

[0051] The pusher lever 22 pushes the first mahjong tile M1 onto the tile holder 3. This action is relatively simple and will not be described in detail here. See... Figure 8 and Figure 9The first mahjong tile M1 is already on the tile-holding plate 3. The stacking wheel 2 rotates, and the cam 21 rotates synchronously. The swing arm 4 drives the tile-holding plate 3 to swing towards the second position. Once in the second position, the pusher arm 22 pushes the second mahjong tile M2 from the end platform 61 of the tile-feeding rail 6 onto the tile-holding plate 3. Figure 10 and Figure 11 The position shown is the back side of the first mahjong tile M1 at this time. Figure 10 The second mahjong tile M2 (on the left side) is already below the end platform 61 of the tile delivery track 6; the stacking wheel 2 continues to rotate, and the pusher 22 pushes the second mahjong tile M2 onto the first mahjong tile M1. During this process, guided by the first drive surface 211, the tile support plate 3 will move to the third position, such as... Figure 12 and Figure 13 As shown, because the size of the first driving surface is small, the angle of movement of the plate 3 is small. Figures 10 to 13 The angle change may not be noticeable in the middle, at this time the front side of the second mahjong tile M2 ( Figure 12 The right side of the first mahjong tile (M1) is lifted by the first tile, and together with the pushing force of the pusher 22, the second mahjong tile (M2) is tilted and leaves the end platform 61 of the delivery rail 6. Simultaneously, the first mahjong tile (M1) maintains a certain tilt angle, allowing the second tile (M2) to move along the top surface of the first tile (M1), thus preventing the second tile (M2) from falling onto the first tile (M1) and causing noise. After the center of gravity of the second tile (M2) falls onto the first tile (M1), the cam 21 continues to drive the swing arm 4 to keep the tile support plate 3 in the second position, while the pusher 22 pushes the second tile (M2) completely onto the first tile (M1). Figure 14 and Figure 15 As shown, from Figure 14 As can be seen, because the pusher 22 moves downwards when it rotates, if the tile-supporting plate 3 does not return to the second position, the pusher 22 may act on the first mahjong tile M1; then, a new first mahjong tile M1 will be delivered to the tile-feeding rail 6, the stacking wheel 2 continues to rotate, and the tile-supporting plate 3 continues to swing towards the first position until it reaches and remains in the first position, as shown. Figure 16 and Figure 17 As shown, at this point, the tile-supporting plate 3 is flush with the tile-receiving surface 51 of the tile-holding plate 5, and the new first mahjong tile M1 will be pushed forward by the tile-pushing rod 22. Figure 16 (On the right side) The new first mahjong tile M1 is slightly higher than the first mahjong tile M1 in front, so the new first mahjong tile M1 can simultaneously press against the two stacked mahjong tiles, pushing the two stacked mahjong tiles forward and finally pushing them onto the tile-holding plate 5, as shown. Figures 18 to 21As shown, the stacking of two mahjong tiles is now complete. As the stacking wheel 2 continues to rotate, subsequent mahjong tiles will be stacked and pushed onto the tile support plate 5 one after another, until the last two mahjong tiles are stacked onto the tile support plate 3, thus completing the entire stacking process.

[0052] Example 2:

[0053] The present invention also provides a mahjong machine, such as Figures 1 to 3 As shown, the device includes a frame 8 and a card stacking mechanism, a card pusher plate 81, and a card lifter plate 82 mounted on the frame 8. The card stacking mechanism is the same as in the above embodiment. The card pusher plate 81 is located above the card support plate 5 and extends above the card holder plate 3. The card lifter plate 82 is located inside the card support plate 5. The card stacking mechanism reduces costs, and the entire card stacking process is quiet, almost noiseless, providing a very good user experience. The card pusher plate 81 extends above the card holder plate 3, and when pushing cards, it pushes the mahjong tiles on the card support plate 5 and the card holder plate 3 together onto the card lifter plate 82.

[0054] Other content not described in this embodiment can be found in Embodiment 1.

[0055] In addition to the preferred embodiments described above, the present invention may have other embodiments. Those skilled in the art can make various changes and modifications based on the present invention, and all such changes and modifications should fall within the scope defined in the claims of the present invention, as long as they do not depart from the spirit of the present invention.

Claims

1. A card stacking mechanism comprising a card stacking motor, a card stacking wheel, a card supporting plate and a swing lever, wherein the card stacking wheel is driven by the card stacking motor, characterized in that, The tile-supporting plate is located between the tile-bearing plate and the end platform of the tile-feeding rail in the mahjong machine. The tile-supporting plate is hinged to the tile-bearing plate or a bracket. It has a first position flush with the tile-bearing plate and a second position for receiving the second mahjong tile. The second position is lower than the first position. A swing arm is hinged to the bracket and movably connected to the tile-supporting plate. A cam is provided on the stacking wheel, and the swing arm abuts against the working surface of the cam. The cam rotates with the stacking wheel, causing the swing arm to swing. The swing arm drives the tile-supporting plate from the second position to the first position, and then the tile-supporting plate moves from the first position to the second position due to gravity. The card-supporting plate has a third position, which is located between the first and second positions. When the card-supporting plate receives the second mahjong tile, it moves to the third position so that the second mahjong tile moves onto the first mahjong tile with the top surface of the second mahjong tile attached to it. The working surface of the cam includes a first driving surface that moves the card-supporting plate from the second position to the third position and back to the second position. The end platform of the card-feeding rail is higher than the card-bearing surface of the card-receiving plate, so that the mahjong tiles on the end platform of the card-feeding rail can move forward and push the two mahjong tiles stacked on the card-supporting plate onto the card-bearing plate.

2. The card stacking mechanism of claim 1, wherein, The working surface of the cam includes a first arcuate surface that keeps the plate in a first position and a second driving surface that swings the plate from the first position to a second position.

3. The card stacking mechanism of claim 2, wherein, The working surface of the cam includes a second arcuate surface that holds the plate in the second position and a third driving surface that swings the plate from the second position to the first position.

4. The card stacking mechanism of claim 3, wherein, The second arc surface includes a longer segment and a shorter segment. The longer segment is located between the first driving surface and the second driving surface, and the shorter segment is located between the first driving surface and the third driving surface.

5. The card stacking mechanism of claim 1, wherein, The rocker arm is provided with a first roller that contacts the working surface of the cam.

6. The card stacking mechanism of claim 1, wherein, The swing arm extends below the sign-holding plate to support the sign-holding plate, and the swing arm is equipped with a second roller that contacts the sign-holding plate.

7. The card stacking mechanism according to claim 1, characterized in that, The stacking wheel is provided with a laterally extending pusher rod on its side. The mahjong tiles on the end platform of the feeding rail are located on the rotation trajectory of the pusher rod. The stacking wheel is connected to the output shaft of the stacking motor.

8. A mahjong machine, comprising a frame and a tile stacking mechanism, a tile pushing plate, and a tile lifting plate mounted on the frame, characterized in that, The card stacking mechanism is any one of the card stacking mechanisms described in claims 1 to 7, wherein the card pusher is located above the card support plate and extends above the card holder plate, and the card lifter is located inside the card support plate.

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