Manual dice tray lift

Abstract

The present invention discloses a manually-lifted dice tray, which comprises a random module and a lifting module. The random module includes a dice bowl, and the dice bowl is adsorbed to the top of the lifting module through a magnetic block fixedly arranged at the bottom. The lifting module includes a lifting tube and a fixed tube. The lifting tube is movably sleeved in the upper part of the fixed tube through an elastic device, and the rising and falling of the dice bowl are realized by pressing.

Description

Technical Field

[0001] The present invention relates to the field of entertainment appliances, particularly to the field of the structure of mahjong machines, and specifically to a manually liftable dice tray. Background Art

[0002] In the prior art, the dice tray arranged in the middle of a mahjong machine is driven by a motor to rise, fall, and roll the dice to determine the dealer. For the rising and falling, a lifting motor is provided. When rolling the dice, a vibration motor or a blower is connected to the dice tray to vibrate and blow the dice so that the dice change the points randomly in a jumping form. Its mechanism itself has a complex structure with many driving devices, relatively high failure rate, and is prone to problems such as the motor drive structure getting stuck and the air flow being too weak for maintenance. In addition, since the motor structure and vibration form can be adjusted and controlled through wire control or remote control, it is easy to have problems such as targeted cheating according to the characteristics of the appliance. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention discloses a structure of a manually liftable dice tray, which includes a random module and a lifting module. The lifting module includes a dice bowl, and the dice bowl is adsorbed to the top of the lifting module through a magnetic block fixedly arranged at the bottom. The lifting module includes a lifting tube and a fixed tube. The lifting tube is movably sleeved in the upper part of the fixed tube through an elastic device, and the rising and falling of the dice bowl are realized by pressing.

[0004] Preferably, the dice bowl is a hollow hemispherical bowl-shaped structure. A magnetic block is horizontally fixed at the inner bottom of the dice bowl. A pointer plate is horizontally arranged above the magnetic block. A rotating shaft hole is arranged at the center of the pointer plate. A gravity pointer is rotatably sleeved in the rotating shaft hole. The gravity pointer fits and rotates movably on the pointer plate above the pointer plate. A number of dice are scattered and placed movably in the dice bowl. A transparent glass cover is fixedly arranged at the top of the dice bowl.

[0005] Preferably, the random module further includes a panel assembly. The panel assembly includes a panel. There is a circular cavity in the middle of the panel. The diameter of the circular cavity is larger than the diameter of the bowl mouth of the dice bowl. Below the circular cavity is a receiving cavity. A through hole is arranged at the bottom of the receiving cavity. A positioning magnetic block, a rotating bearing, and a bearing seat are horizontally arranged in the receiving cavity. The positioning magnetic block is arranged below the dice bowl. The top magnetism of the positioning magnetic block is opposite to the bottom magnetism of the magnetic block at the bottom of the dice bowl. A rotating bearing is fixedly connected below the positioning magnetic block. The rotating bearing is a thrust ball bearing. The top race of the rotating bearing is fixedly connected to the bottom of the positioning magnetic block. The bottom race of the rotating bearing is fixedly arranged on the bottom bearing seat.

[0006] Preferably, the lifting pipe is a hollow cylinder. The top of the lifting pipe fixedly supports the bearing seat. A positioning ring is fixedly arranged on the outer wall of the lifting pipe. The positioning ring is reciprocally and movably clamped to the bottom of the accommodating cavity and the top of the fixed pipe to limit the stroke range of the lifting pipe. An elastic device is arranged in the lifting pipe. The elastic device is a spring. The top of the spring abuts against the inner wall of the top of the lifting pipe, and the bottom of the spring is fixedly connected to the fixed base.

[0007] Preferably, the lifting module further includes a positioning unit. The positioning unit includes a guiding groove. The guiding groove is arranged on the outer wall of the lifting pipe. The guiding groove is a bent ring shape. The upper part of the outer ring border of the guiding groove is provided with a left vertex and a right vertex. A downward convexity is arranged between the left vertex and the right vertex. The bottom of the outer ring border of the guiding groove is provided with a bottom depression. The upper part of the inner ring border of the guiding groove is provided with a left protrusion and a right protrusion. A top inner concavity is arranged between the left protrusion and the right protrusion. The bottom of the inner ring border of the guiding groove is provided with a bottom protrusion. The left vertex is arranged above the left of the left protrusion, the right vertex is arranged above the left of the right protrusion, the downward convexity is arranged at the upper right of the top inner concavity, and the bottom depression is arranged at the lower right of the bottom protrusion.

[0008] Preferably, a guiding protrusion is arranged on the inner wall of the fixed pipe corresponding to one side of the guiding groove. The guiding protrusion is a cylinder perpendicular to the inner wall of the fixed pipe. The guiding protrusion is movably clamped in the guiding groove.

[0009] Preferably, a ball groove is arranged on the inner wall of the fixed pipe corresponding to one side of the guiding groove. The ball groove is a horizontally concave arc groove. A guiding ball is movably clamped in the ball groove. One end of the guiding ball is in rolling cooperation with the ball groove, and the other end is in rolling cooperation and guiding with the guiding groove.

[0010] Preferably, the lifting module further includes a fixed base. The fixed base is fixedly arranged in the mahjong machine frame. The outside of the fixed pipe is provided with threads. The bottom of the fixed pipe is threadedly connected to the fixed base. The inner wall of the fixed base is provided with threads matching the fixed pipe. An induction module is arranged inside the fixed base corresponding to the lower part of the lifting pipe wall. A spring clamping column is arranged at the center of the fixed base. A threaded central hole is arranged at the center of the spring clamping column.

[0011] Preferably, the induction module includes a switch. The switch is a push-button switch. The switch is pressed when the lifting pipe wall moves to the lowest point.

[0012] Preferably, a wire port is arranged on the side wall of the fixed base.

[0013] Compared with the prior art, the manual lifting dice tray provided by the present invention has the following beneficial effects: The complex structures such as the motor drive mechanism can be eliminated through the manual pop-up lifting method, reducing the failure rate of the mahjong machine and lightening the overall weight; A separable dice bowl is provided, which can separate the dice bowl in the existing state and shake the bowl to refresh the dice points; An induction device is arranged at the bottom of the fixed tube, and the execution control of the mahjong machine is realized through the pressing effect of the lifting tube, which is convenient for operation; The gravity pointer in the dice bowl rotates and impacts the dice in the bowl during shaking, interfering with their rolling posture to prevent cheating, without consuming electricity and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will discuss the drawings required for the description of the embodiments or the prior art. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings.

[0015] Figure 1 It is a schematic perspective view of the overall structure of the manual lifting dice tray of the present invention.

[0016] Figure 2 It is a schematic cross-sectional view of the overall structure of the manual lifting dice tray of the present invention.

[0017] Figure 3 It is a schematic perspective view of the overall structure of the manual lifting dice tray of the present invention with a cover.

[0018] Figure 4 It is the front view of the overall structure of the manual lifting dice tray of the present invention with a cover.

[0019] Figure 5 It is a schematic view of the structure of the dice bowl of the manual lifting dice tray of the present invention.

[0020] Figure 6 It is a schematic cross-sectional view of the structure of the dice bowl of the manual lifting dice tray of the present invention.

[0021] Figure 7 It is a schematic cross-sectional view of the convex fixed tube of the manual lifting dice tray of the present invention.

[0022] Figure 8 It is a schematic view of the structure of the lifting tube of the manual lifting dice tray of the present invention.

[0023] Figure 9 It is a schematic cross-sectional view of the chute-type fixed tube of the manual lifting dice tray of the present invention.

[0024] In the figure: 1 - dice bowl, 11 - pointer dial, 12 - gravity pointer, 13 - magnetic block, 2 - panel, 21 - positioning magnet, 22 - rotating bearing, 23 - bearing seat, 24 - accommodating cavity, 3 - lifting tube, 31 - spring, 32 - positioning ring, 33 - guiding groove, 4 - fixed tube, 41 - fixed base, 411 - wire opening, 42 - fixing ring, 43 - spring clamping post, 44 - guiding projection, 45 - guiding ball, 46 - ball groove, 5 - switch. Detailed implementation manner

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments described in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0026] An embodiment of the present invention provides a manually liftable dice tray, which is cooperatively installed at the middle position on the top of a mahjong machine. Embodiment 1 is as Figures 1 to 8As shown, it includes a random module, a lifting module, and a sensing module. The random module includes a dice bowl 1 and a panel assembly. The dice bowl 1 is a hollow hemispherical bowl-shaped structure, and the bottom of the dice bowl 1 is made of non-magnetizable material. A magnetic block 13 is horizontally fixed at the inner bottom of the dice bowl 1. Above the magnetic block 13, a pointer plate 11 is horizontally arranged. A rotating shaft hole is provided at the center of the pointer plate 11, and a gravity pointer 12 is rotatably sleeved in the rotating shaft hole. The gravity pointer 12 is movably rotatable on the pointer plate 11 above the pointer plate 11. Three dice are placed in the dice bowl 1 in a scattered manner. A transparent glass cover is fixedly arranged at the top of the dice bowl 1 for observing the pointer direction and the dice points. The panel assembly includes a panel 2. There is a circular cavity in the middle of the panel 2, and the diameter of the circular cavity is larger than the diameter of the bowl mouth of the dice bowl 1. Below the circular cavity is a receiving cavity 24. A through hole is provided at the bottom of the receiving cavity 24, and a mahjong collection port is provided below the side wall of the receiving cavity 24. The collection port is communicated with the internal shuffling device of the mahjong machine. A positioning magnet 21, a rotating bearing 22, and a bearing seat 23 are horizontally arranged in the receiving cavity 24. The positioning magnet 21 is arranged below the dice bowl 1. The top magnetism of the positioning magnet 21 is opposite to the bottom magnetism of the magnetic block 13 at the bottom of the dice bowl 1, and they are magnetically adsorbed when approaching. The positioning magnet 21 is fixedly connected with the rotating bearing 22 below. The rotating bearing 22 is a thrust ball bearing. The top race of the rotating bearing 22 is fixedly connected with the bottom of the positioning magnet 21, and the bottom race of the rotating bearing 22 is fixedly arranged on the bottom bearing seat 23. The bearing seat 23 is fixed at the center of the bottom of the receiving cavity 24. The bearing seat 23 is connected to the lifting module, and the lifting module is rotatably sleeved in the through hole.

[0027] The described lifting module includes a lifting tube 3, a fixed tube 4, and a fixed base 41. The lower part of the lifting tube 3 is movably sleeved inside the fixed tube 4. The lifting tube 3 is a hollow cylinder. The top of the lifting tube 3 fixedly supports the bearing seat 23. A spring 31 is arranged inside the lifting tube 3, and the top of the spring 31 abuts against the inner wall of the top of the lifting tube 3. A positioning ring 32 is fixedly arranged on the outer wall of the lifting tube 3. The positioning ring 32 is used for vertically and movably clamping the bottom of the accommodating cavity 24 and the top of the fixed tube 4 to limit the stroke range of the lifting tube 3. A guiding groove 33 is arranged on the outer wall of the lifting tube 3. The guiding groove 33 is a bent ring. The upper part of the outer frame of the guiding groove 33 is provided with a left vertex and a right vertex. A downward convex is arranged between the left vertex and the right vertex. The bottom of the outer frame of the guiding groove 33 is provided with a bottom depression. The upper part of the inner frame of the guiding groove 33 is provided with a left protrusion and a right protrusion. A top inner concave is arranged between the left protrusion and the right protrusion. The bottom of the inner frame of the guiding groove 33 is provided with a bottom protrusion. The left vertex is arranged above the left of the left protrusion, the right vertex is arranged above the left of the right protrusion, the downward convex is arranged above the right of the top inner concave, and the bottom depression is arranged below the right of the bottom protrusion. The above characteristic points are connected in series in the guiding groove 33. A guiding protrusion 44 is arranged on the inner wall of the fixed tube 4 corresponding to one side of the guiding groove 33. The guiding protrusion 44 is a cylinder perpendicular to the inner wall of the fixed tube 4. The guiding protrusion 44 is movably clamped inside the guiding groove 33. Threads are arranged on the outside of the fixed tube 4. A fixing ring 42 is arranged on the upper part of the outer wall of the fixed tube 4. The bottom of the fixed tube 4 is threadedly connected to a nut, and a fixed base 41 fixed inside the mahjong machine is arranged below the nut. Threads matching the fixed tube 4 are arranged on the inner wall of the fixed base 41.

[0028] An induction module is arranged inside the fixed base 41 corresponding to the lower part of the wall of the lifting tube 3. The induction module includes a switch 5. The switch 5 is a push-button switch 5. A wire port 411 is also arranged on the side wall of the fixed base 41. After being connected to a wire, the switch 5 is electrically connected to the control unit of the mahjong machine through the wire port 411. A spring clamping post 43 is arranged at the center of the fixed base 41. A threaded central hole is arranged at the center of the spring clamping post 43.

[0029] Embodiment 2, a manually lifted dice tray, comprising a random module, a lifting module and a sensing module. The random module includes a dice bowl 1 and a panel assembly. The dice bowl 1 is a hollow hemispherical bowl-shaped structure, and the bottom of the dice bowl 1 is made of non-magnetizable material. A magnetic block 13 is horizontally fixed at the inner bottom of the dice bowl 1. Above the magnetic block 13, a pointer disk 11 is horizontally arranged. A rotating shaft hole is provided at the center of the pointer disk 11, and a gravity pointer 12 is rotatably sleeved in the rotating shaft hole. The gravity pointer 12 is movably rotatable on the pointer disk 11 above and in contact with the pointer disk 11. Three dice are scattered and placed movably in the dice bowl 1. A transparent glass cover is fixedly arranged at the top of the dice bowl 1 for observing the pointer direction and the dice points. The panel assembly includes a panel 2. There is a circular cavity in the middle of the panel 2, and the diameter of the circular cavity is larger than the diameter of the bowl mouth of the dice bowl 1. Below the circular cavity is a receiving cavity 24. A through hole is provided at the bottom of the receiving cavity 24, and a mahjong collection port is provided below the side wall of the receiving cavity 24. The collection port is communicated with the internal shuffling device of the mahjong machine. A positioning magnet 21, a rotating bearing 22 and a bearing seat 23 are horizontally arranged in the receiving cavity 24. The positioning magnet 21 is arranged below the dice bowl 1. The top magnetism of the positioning magnet 21 is opposite to the bottom magnetism of the magnetic block 13 at the bottom of the dice bowl 1, and they are magnetically adsorbed when approaching. The positioning magnet 21 is fixedly connected with a rotating bearing 22 below. The rotating bearing 22 is a thrust ball bearing. The top race of the rotating bearing 22 is fixedly connected with the bottom of the positioning magnet 21, and the bottom race of the rotating bearing 22 is fixedly arranged on the bottom bearing seat 23. The bearing seat 23 is fixed at the center of the bottom of the receiving cavity 24. The bearing seat 23 is connected to the lifting module, and the lifting module is movably sleeved in the through hole.

[0030] The described lifting module includes a lifting tube 3, a fixed tube 4, and a fixed base 41. The lower part of the lifting tube 3 is movably sleeved inside the fixed tube 4. The lifting tube 3 is a hollow cylinder. The top of the lifting tube 3 fixedly supports the bearing seat 23. A spring 31 is arranged inside the lifting tube 3, and the top of the spring 31 abuts against the inner wall of the top of the lifting tube 3. A positioning ring 32 is fixedly arranged on the outer wall of the lifting tube 3, and the positioning ring 32 is used for vertically and movably clamping the bottom of the accommodating cavity 24 and the top of the fixed tube 4 to limit the stroke range of the lifting tube 3. A guiding groove 33 is arranged on the outer wall of the lifting tube 3, and the guiding groove 33 is a bent ring shape. The upper part of the outer frame of the guiding groove 33 is provided with a left vertex and a right vertex. A downward convex is arranged between the left vertex and the right vertex. The bottom of the outer frame of the guiding groove 33 is provided with a bottom depression; the upper part of the inner frame of the guiding groove 33 is provided with a left protrusion and a right protrusion. A top inner concave is arranged between the left protrusion and the right protrusion. The bottom of the inner frame of the guiding groove 33 is provided with a bottom protrusion. The left vertex is arranged above the left of the left protrusion, the right vertex is arranged above the left of the right protrusion, the downward convex is arranged above the right of the top inner concave, and the bottom depression is arranged below the right of the bottom protrusion. The above characteristic points are connected in series in the guiding groove 33. As Figure 9 shown, on one side of the inner wall of the fixed tube 4 corresponding to the guiding groove 33, a ball groove 46 is arranged. The ball groove 46 is a horizontally concave arc-shaped groove. A guiding ball 45 is movably clamped inside the ball groove 46. One end of the guiding ball 45 is in rolling cooperation with the ball groove 46, and the other end is in rolling cooperation and guiding with the guiding groove 33. Threads are arranged on the outside of the fixed tube 4, and a fixing ring 42 is arranged on the upper part of the outer wall of the fixed tube. The bottom of the fixed tube 4 is threadedly connected to a nut, and a fixed base 41 fixed inside the mahjong machine is arranged below the nut. Threads matching the fixed tube 4 are arranged on the inner wall of the fixed base 41.

[0031] An induction module is arranged inside the fixed base 41 corresponding to the lower part of the wall of the lifting tube 3. The induction module includes a switch 5, and the switch 5 is a push-button switch 5. A wire port 411 is also arranged on the side wall of the fixed base 41. After the switch 5 is connected to a wire, it is electrically connected to the control unit of the mahjong machine through the wire port 411. A spring clamping post 43 is arranged at the center of the fixed base 41. A threaded central hole is arranged at the center of the spring clamping post 43.

[0032] In the state of use, the dice bowl 1 can be detachably separated from the panel 2. Shake the dice bowl 1 to refresh the placement position and the facing side of the dice. When the glass panel 2 of the dice bowl 1 is perpendicular to the horizontal ground, due to the arrow of the gravity pointer 12 being vertically below, slowly place the dice bowl 1 horizontally, and the dice stirred by the pointer and the position pointed to by the gravity pointer 12 can be obtained. Place the dice bowl 1 into the accommodation cavity 24. The bottom of the magnetic block 13 and the positioning magnetic block 21 have opposite polarities and adsorb and press the dice bowl 1 against each other. The positioning ring 32 is clamped to the bottom of the accommodation cavity 24, and the guiding protrusion 44 is at the lowest point of the guiding groove 33. When pressing the dice bowl 1, the lifting tube 3 descends. When the positioning ring 32 abuts against the top of the fixed tube 4, the guiding protrusion 44 is at the highest point on the left side of the guiding groove 33, and the bottom of the lifting tube 3 presses the switch 5 to achieve point contact and connection. After releasing the pressure, the spring 31 elastically lifts the lifting tube 3. When the lifting tube 3 rises, the guiding protrusion 44 runs to the concave part under the top of the guiding groove 33. Press the guiding groove 33 again, the guiding protrusion 44 runs to the raised part on the upper right of the guiding groove 33, and the bottom of the lifting tube 3 makes point contact and connection with the switch 5. After releasing the pressure, the lifting tube 3 returns to its original height under the reset action of the spring 31. The positioning ring 32 abuts against the bottom of the accommodation cavity 24 again, and the guiding protrusion 44 moves downward along the right side groove of the guiding groove 33 to reach the lowest point of the guiding groove 33. Signals are generated by touching the switch 5 and transmitted to the controller, and the controller performs the on-off operation.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Manual dice tray with lifting function, comprising a random module and a lifting module, characterized in that: The described random module includes a dice bowl (1). The dice bowl (1) is adsorbed to the top of the lifting module through a magnetic block (13) horizontally fixed at the inner bottom. The lifting module includes a lifting tube (3) and a fixed tube (4). The lifting tube (3) is movably sleeved in the upper part of the fixed tube (4) through an elastic device, and the dice bowl (1) is lifted and lowered by pressing. The dice bowl (1) is a hollow hemispherical bowl-shaped structure. Above the magnetic block (13), a pointer plate (11) is horizontally arranged. A rotating shaft hole is provided at the center of the pointer plate (11). A gravity pointer (12) is rotatably sleeved in the rotating shaft hole. The gravity pointer (12) fits above the pointer plate (11) and rotates movably on the pointer plate (11). The random module further includes a panel assembly. The panel assembly includes a panel (2). There is a circular cavity in the middle of the panel (2). The diameter of the circular cavity is larger than the diameter of the bowl opening of the dice bowl (1). Below the circular cavity is a receiving cavity (24). A through hole is provided at the bottom of the receiving cavity (24). A positioning magnetic block (21), a rotating bearing (22), and a bearing seat (23) are horizontally arranged in the receiving cavity (24). The positioning magnetic block (21) is arranged below the dice bowl (1). The top magnetism of the positioning magnetic block (21) is opposite to the bottom magnetism of the magnetic block (13) at the bottom of the dice bowl (1). A rotating bearing (22) is fixedly connected below the positioning magnetic block (21). The rotating bearing (22) is a thrust ball bearing. The top race of the rotating bearing (22) is fixedly connected to the bottom of the positioning magnetic block (21). The bottom race of the rotating bearing (22) is fixedly arranged on the bottom bearing seat (23). The lifting tube (3) is a hollow cylinder. The top of the lifting tube (3) fixedly supports the bearing seat (23). A positioning ring (32) is fixedly arranged on the outer wall of the lifting tube (3). The positioning ring (32) reciprocally engages with the bottom of the receiving cavity (24) and the top of the fixed tube (4) to limit the stroke range of the lifting tube (3). An elastic device is arranged in the lifting tube (3). The elastic device is a spring (31). The top of the spring (31) abuts against the inner wall of the top of the lifting tube (3). The bottom of the spring (31) is fixedly connected to a fixed base (41). The lifting module further includes a positioning unit. The positioning unit includes a guiding groove (33). The guiding groove (33) is arranged on the outer wall of the lifting tube (3). The guiding groove (33) is a bent ring shape. The upper part of the outer frame of the guiding groove (33) has a left vertex and a right vertex. There is a downward convex between the left vertex and the right vertex. The bottom of the outer frame of the guiding groove (33) has a bottom depression. The upper part of the inner frame of the guiding groove (33) has a left protrusion and a right protrusion.

2. The manually liftable dice tray according to claim 1, wherein: A number of dice are scattered and placed movably in the described dice bowl (1), and a transparent glass cover is fixedly arranged on the top of the dice bowl (1).

3. The manual lifting dice tray according to claim 1, wherein: There is a concave top between the left protrusion and the right protrusion. There is a bottom protrusion at the bottom of the inner circle border of the guiding groove (33). The left vertex is arranged above the left of the left protrusion, the right vertex is arranged above the left of the right protrusion, the lower convex is arranged above the right of the concave top, and the bottom depression is arranged below the right of the bottom protrusion.

4. The manually liftable dice tray according to claim 3, wherein: On one side of the inner wall of the fixed tube (4) corresponding to the guiding groove (33), a guiding protrusion (44) is arranged. The guiding protrusion (44) is a cylinder perpendicular to the inner wall of the fixed tube (4), and the guiding protrusion (44) is movably clamped in the guiding groove (33).

5. The manual lifting dice tray according to claim 3, characterized in that: On one side of the inner wall of the fixed tube (4) corresponding to the guiding groove (33), a ball groove (46) is arranged. The ball groove (46) is a horizontally concave arc groove. A guiding ball (45) is movably clamped in the ball groove (46). One end of the guiding ball (45) is in rolling fit with the ball groove (46), and the other end is in rolling fit with the guiding groove (33) for guiding.

6. The manual lifting dice tray according to claim 4 or 5, characterized in that: The lifting module further includes a fixed base (41). The fixed base (41) is fixedly arranged in the mahjong machine frame. The outer part of the fixed tube (4) is provided with threads. The bottom of the fixed tube (4) is threadedly connected to the fixed base (41). The inner wall of the fixed base (41) is provided with threads matching the fixed tube (4). An induction module is arranged inside the fixed base (41) corresponding to the lower part of the wall of the lifting tube (3). A spring clamping post (43) is arranged at the center of the fixed base (41), and a threaded central hole is arranged at the center of the spring clamping post (43).

7. The manually liftable dice tray according to claim 6, wherein: The induction module includes a switch (5). The switch (5) is a push-button switch (5). When the wall of the lifting tube (3) moves to the lowest point, the switch (5) is pressed.

8. The manually liftable dice tray according to claim 6, wherein: A wire port (411) is arranged on the side wall of the fixed base (41).

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