Main machine of automatic mahjong machine

Abstract

The utility model discloses the main machine of automatic mahjong machine has solved the technical problem of the cover plate of the main machine of automatic mahjong machine in the prior art for covering the card feeding mechanism and is disassembled troublesome. The main machine of automatic mahjong machine proposed by the utility model, including bottom plate, the card shuffler, top cover and side cover, the card shuffler installs on the bottom plate, the top cover is installed in the card shuffler top, the side cover is equipped with a plurality of, the side cover by the top cover one end to the side direction of the bottom plate extension, the side cover includes upper connecting end and lower connecting end, the upper connecting end with the top cover plug -in connection, the lower connecting end with the bottom plate plug -in connection, make the disassembly of side cover more convenient.

Description

Technical Field

[0001] This utility model relates to the field of automatic mahjong machine technology, and in particular to the main unit of an automatic mahjong machine. Background Technology

[0002] An automatic mahjong machine with tilting tile feeding mechanism includes a base plate, a shuffling drum, a top cover, and side covers. The top cover is installed above the shuffling drum, and the side covers connect the top cover and the base plate. The side covers are used to cover the tile feeding mechanism in the automatic mahjong machine.

[0003] Existing covers are usually fixed to the top cover and the bottom plate with screws, making the disassembly and assembly of the covers quite troublesome. Utility Model Content

[0004] This utility model proposes a main unit for an automatic mahjong machine to overcome the shortcomings of the prior art, thereby solving the technical problem of the cumbersome disassembly and assembly of the cover plate connecting the top cover and the bottom plate in the main unit of the automatic mahjong machine in the prior art.

[0005] To achieve the above technical objectives, the main unit of the automatic mahjong machine proposed in this utility model includes a base plate, a shuffling drum, and a top cover. The shuffling drum is installed on the base plate, and the top cover is installed on the upper end of the shuffling drum. The main unit of the automatic mahjong machine also includes multiple side covers, which are distributed circumferentially around the shuffling drum. The upper end of the side cover is inserted into the top cover, and the lower end of the side cover is inserted into the base plate.

[0006] The main body of the automatic mahjong machine of this utility model has a side cover that is plugged into the top cover and the bottom plate at both ends. The two ends of the side cover do not need to be fixedly connected to the top cover and the bottom plate by fasteners, making it easier to disassemble and assemble the side cover.

[0007] Preferably, the device also includes several annular card pushing devices and several card feeding mechanisms. The annular card pushing devices are located at the corners of the base plate, and the card feeding mechanisms are circumferentially spaced around the outer periphery of the shuffling barrel. The side cover covers the card feeding mechanisms.

[0008] By adopting the aforementioned technical solution, the side cover shields the card feeding mechanism to prevent debris from falling into the card feeding mechanism and entering the ring-shaped card pushing device along with the mahjong tiles.

[0009] Preferably, one of the upper end and the top cover includes a first plug-in block, and the other is provided with a first plug-in hole that is plugged into and engaged with the first plug-in block;

[0010] One of the upper end and the top cover includes a second insertion block, and the other is provided with a second insertion hole that is inserted and engaged with the second insertion block;

[0011] The extension direction of the first plug hole is different from the extension direction of the second plug hole.

[0012] By adopting the aforementioned technical solution, since the extension directions of the first insertion hole and the second insertion hole are different, the direction in which the first insertion block detaches from the top cover and the direction in which the second insertion block detaches from the top cover are different. As a result, it is more difficult for the insertion block to detach from the top cover, thus improving the reliability of the insertion connection between the side cover and the top cover.

[0013] Preferably, the first plug-in block is clearance-fitted with the first plug-in hole, and the second plug-in block is clearance-fitted with the second plug-in hole.

[0014] Using the aforementioned technical solution, the connection between the upper end and the top cover can be achieved by first connecting one set of plug-in parts and plug-in holes, and then rotating the side cover to complete the connection of the other set of plug-in parts and plug-in holes, thus reducing the difficulty of connecting the upper end and the top cover.

[0015] Preferably, one of the first insertion hole and the second insertion hole is provided with a first guide portion and a second guide portion along the insertion direction. The first guide portion extends obliquely from the outside to the inside along the insertion direction, and the second guide portion extends obliquely from one end of the first guide portion outward along the insertion direction.

[0016] Using the aforementioned technical solution, the first guide part can guide the second plug block towards the center of the second plug hole, guiding a portion of the second plug block into the second plug hole. When a portion of the second plug block enters the second plug hole, the second guide part guides the direction of the second plug block's continued movement. At the same time, the outward tilt of the second guide part allows the second plug block to gradually reduce its contact with the second guide part as it continues to move, thereby reducing the friction between the second plug hole and the second plug hole, making the insertion of the upper end and the top cover easier.

[0017] Preferably, the inclination of the first guide portion is gentler than that of the second guide portion.

[0018] By adopting the aforementioned technical solution, the small inclination of the first guide portion helps to increase the guiding area of ​​the first guide portion within a limited guiding length, thereby improving the guiding effect of the first guide portion; when the second plug block is guided by the second guide portion, the included angle between the second plug block and the second plug hole decreases with the swing of the side cover, and the large inclination of the second guide portion helps to match the angle at which the second plug block is inserted into the second plug hole, further improving the guiding effect.

[0019] Preferably, the extension direction of the first insertion hole is perpendicular to the extension direction of the second insertion hole.

[0020] By adopting the aforementioned technical solution, the direction in which the first plug-in block detaches from the top cover and the direction in which the second plug-in block detaches from the top cover are also perpendicular to each other, further increasing the difficulty of detaching the plug-in block from the top cover and improving the reliability of the plug-in connection between the side cover and the top cover.

[0021] Preferably, the first insertion hole extends horizontally and the second insertion hole extends vertically.

[0022] The aforementioned technical solution facilitates the processing or integral molding of the first and second insertion holes on the top cover, which helps to reduce costs.

[0023] Preferably, the top cover has a circumferential support flange, the upper surface of which forms a support surface for supporting the side cover, and the top cover includes a first surface that connects to the side cover, the support surface being lower than the first surface.

[0024] Using the aforementioned technical solution, the support flange is used to support the side cover, and its upper end is inserted into the top cover. The top cover provides support force to the side cover through the support flange, ensuring the reliability and stability of the insertion connection between the side cover and the top cover.

[0025] Preferably, the first surface is flush with the upper surface of the side cover.

[0026] Using the aforementioned technical solution, the side cover and the top cover are connected by an insertion joint. The upper surface of the side cover is flush with the first surface of the top cover, which makes it easy for the operator to judge whether the side cover is inserted properly by touching the connection position of the side cover and the top cover after they are connected. At the same time, the fact that the upper surface of the side cover is flush with the first surface of the top cover also makes the product more aesthetically pleasing.

[0027] Preferably, the lower end includes a third insertion block, and the base plate is provided with a third insertion hole that engages with the third insertion block. The elastic deformation of the side cover causes the third insertion block to be inserted into the third insertion hole, and the restoring force of the side cover prevents the third insertion block from disengaging from the third insertion hole.

[0028] By adopting the aforementioned technical solution, the insertion connection between the lower end and the base plate is simplified, and the reset force of the side cover provides a certain guarantee for the insertion connection between the lower end and the base plate, making it less likely for the third insertion block to detach from the third insertion hole.

[0029] Preferably, the third insertion hole extends laterally, and the elastic reset of the side cover causes at least a portion of the third insertion block to extend into the third insertion hole along the elastic reset direction of the side cover.

[0030] Using the aforementioned technical solution, the third plug-in block needs to overcome the elasticity of the side cover to detach from the third plug-in hole, which increases the difficulty of detaching the lower end from the base plate.

[0031] Preferably, the end of the third plug block has a radially protruding limiting rib, which passes through the third plug hole. The restoring force of the side cover causes the wall around the third plug hole to stop the limiting rib in the extending direction of the third plug hole.

[0032] By adopting the aforementioned technical solution, the limiting rib on the third plug block can be stopped by the surrounding wall of the third plug hole under the restoring force of the side cover, thereby restricting the third plug block from leaving the third plug hole and improving the stability and reliability of the plug connection between the lower end and the base plate.

[0033] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the main unit of the automatic mahjong machine in an embodiment of this utility model;

[0035] Figure 2 This is a schematic diagram of the base plate, shuffling bucket, top cover, and side cover in an embodiment of this utility model;

[0036] Figure 3 for Figure 2 A sectional view;

[0037] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0038] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0039] Figure 6 for Figure 3 Enlarged view of point B when the side cover and top cover are in the initial plug-in connection position;

[0040] Figure 7 for Figure 3 Enlarged view of section B during the insertion and connection process between the side cover and the top cover;

[0041] Figure 8 for Figure 3 Enlarged view of point C in the middle;

[0042] Figure 9 This is a schematic diagram of the top cover in an embodiment of the present utility model;

[0043] Figure 10 This is a schematic diagram of the side cover in an embodiment of the present utility model;

[0044] Figure 11 This is another schematic diagram of the side cover in an embodiment of the present utility model;

[0045] Figure 12 This is another schematic diagram of the base plate, shuffling bucket, top cover, and side cover in an embodiment of this utility model;

[0046] Figure 13 for Figure 12 A sectional view;

[0047] Figure 14 for Figure 13 Enlarged view at point D;

[0048] Figure 15 This is a schematic diagram of the side cover in an embodiment of the present utility model.

[0049] Figure label:

[0050] 100. Base plate; 110. Boss; 120. Third insertion hole;

[0051] 200. Shuffling barrel;

[0052] 300. Circular card-pushing device;

[0053] 400, top cover; 401, first surface; 410, first insertion hole; 420, second insertion hole; 421, first guide portion; 422, second guide portion; 430, support flange; 431, support surface;

[0054] 500, side cover; 501, upper end face; 510, upper end; 511, first plug-in block; 512, second plug-in block; 520, lower end; 521, third plug-in block; 5211, limiting rib; 530, connecting plate. Detailed Implementation

[0055] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" or "several" means two or more, unless otherwise expressly defined.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] like Figures 1 to 15 As shown in the embodiment of this utility model, the main body of the automatic mahjong machine includes a base plate 100, a shuffling drum 200, a top cover 400, and multiple side covers 500. The shuffling drum 200 is mounted on the base plate 100, and the top cover 400 is mounted on the upper end of the shuffling drum 200. The multiple side covers 500 are distributed circumferentially around the shuffling drum 200, with the upper end 510 of the side cover 500 inserted into the top cover 400 and the lower end 520 of the side cover 500 inserted into the base plate 100.

[0060] The main body of the automatic mahjong machine of this utility model has a side cover 500 with two ends that are respectively inserted into the top cover 400 and the bottom plate 100. The two ends of the side cover 500 do not need to be fixedly connected to the top cover 400 and the bottom plate 100 by fasteners, making it easier to disassemble and assemble the side cover 500.

[0061] The automatic mahjong machine also includes several annular card-pushing devices 300 and card-feeding mechanisms (not shown). The annular card-pushing devices 300 are located at the corners of the base plate 100, and the card-feeding mechanisms are circumferentially spaced around the outer periphery of the shuffling tank 200. The card-feeding mechanisms are connected between the shuffling tank 100 and the annular card-pushing devices 300, and are used to pick up mahjong tiles from the shuffling tank 200 and transport them to the annular card-pushing devices 300. A side cover 500 covers the card-feeding mechanisms.

[0062] In this embodiment, the shuffling barrel 200 is installed on the base plate 100, forming a shuffling space for mahjong tiles inside the shuffling barrel 200. An opening for inserting mahjong tiles is provided at the top of the shuffling barrel 200, and a top cover 400 is installed above the shuffling barrel 200. The top cover 400 has openings corresponding to the opening of the shuffling barrel 200, and a lifting opening corresponding to the lifting mechanism in the annular pushing device 300.

[0063] For details regarding the circular card pusher 300 and the card delivery mechanism, please refer to the following patent application:

[0064] Chinese invention patent application with publication number CN109985376A, entitled "A stacking mechanism and a card loading device for a mahjong machine";

[0065] Chinese invention patent application with publication number CN107773976A and titled "Ring-shaped tile pusher for automatic mahjong machine and automatic mahjong machine";

[0066] Chinese invention patent application with publication number CN107773977A, entitled "Pushing slot for mahjong machine, ring pushing device for mahjong machine and automatic mahjong machine thereof".

[0067] The side cover 500 covers the card feeding mechanism to prevent debris from falling into the card feeding mechanism and entering the ring pusher 300 along with the mahjong tiles.

[0068] In one embodiment, based on the foregoing embodiments, such as Figures 4 to 7 As shown, the upper end 510 includes a first plug-in block 511 and a second plug-in block 512. The top cover 400 is provided with a first plug-in hole 410 and a second plug-in hole 420. The first plug-in block 511 is plugged into the first plug-in hole 410, and the second plug-in block 512 is plugged into the second plug-in hole 420. The extension directions of the first plug-in hole 410 and the second plug-in hole 420 are different.

[0069] Because the first insertion hole 410 and the second insertion hole 420 extend in different directions, the direction in which the first insertion block 511 detaches from the top cover 400 and the direction in which the second insertion block 512 detaches from the top cover 400 are different. As a result, it is more difficult for the upper end 510 inserted into the top cover 400 to detach from the top cover 400, thereby improving the reliability of the insertion connection between the side cover 500 and the top cover 400.

[0070] In some other embodiments, the first plug-in block 511 and the second plug-in block 512 may be disposed on the top cover 400, and the first plug-in hole 410 and the second plug-in hole 420 may be disposed on the upper end 510.

[0071] In some other embodiments, the first plug-in block 511 and the second plug-in block 512 may be respectively disposed on the upper end 510 and the top cover 400, and correspondingly, the first plug-in hole 410 and the second plug-in hole 420 may be respectively disposed on the top cover 400 and the upper end 510.

[0072] In this embodiment, multiple first plug-in blocks 511 are provided, and multiple first plug-in holes 410 are provided accordingly. Multiple second plug-in blocks 512 are provided, and multiple second plug-in holes 420 are provided accordingly. This arrangement allows the side cover 500 to be plugged into the top cover 400 at multiple locations through the plugging and engagement of multiple first plug-in blocks 511 with multiple first plug-in holes 410, and multiple second plug-in blocks 512 with multiple second plug-in holes 420, further improving the reliability of the plugging connection between the side cover 500 and the top cover 400.

[0073] In this embodiment, the first plug block 511 is a block-shaped protrusion, and correspondingly, the first plug hole 410 is a square hole; the second plug block 512 is a cylindrical protrusion, and correspondingly, the second plug hole 420 is a round hole.

[0074] In some other embodiments, the first plug-in block 511 and the second plug-in block 512 may also be of other shapes, and the first plug-in hole 410 and the second plug-in hole 420 are provided along with the first plug-in block 511 and the second plug-in block 512.

[0075] In a preferred embodiment, such as Figure 4 , Figure 5 As shown, the first plug-in block 511 is clearance-fitted with the first plug-in hole 410, and the second plug-in block 512 is clearance-fitted with the second plug-in hole 420.

[0076] When the upper end 510 is connected to the top cover 400, since there is a gap between the first plug-in block 511 and the first plug-in hole 410, the first plug-in block 511 can be first inserted into the first plug-in hole 410 at an angle. Then, by swinging the upper end 510, the second plug-in block 512 can be inserted into the second plug-in hole 420, thereby completing the connection between the upper end 510 and the top cover 400. Alternatively, the second plug-in block 512 can be inserted into the second plug-in hole 420 first, and then the first plug-in block 511 can be inserted into the first plug-in hole 410 by swinging the upper end 510.

[0077] With the above setup, the connection between the upper end 510 and the top cover 400 can be achieved by first connecting one set of plug-in parts and plug-in holes, and then rotating the side cover 500 to complete the connection of the other set of plug-in parts and plug-in holes, thus reducing the difficulty of connecting the upper end 510 and the top cover 400.

[0078] In a more preferred embodiment, such as Figures 4 to 7 As shown, the second insertion hole 420 is provided with a first guide portion 421 and a second guide portion 422 along the insertion direction. The first guide portion 421 extends inclinedly from the outside to the inside along the insertion direction, and the second guide portion 422 extends inclinedly from one end of the first guide portion 421 outward along the insertion direction.

[0079] In this embodiment, the first plug-in block 511 is first plugged into the first plug-in hole 410. During the plugging process of the second plug-in block 512 into the second plug-in hole 420, the swing of the side cover 500 causes the second plug-in block 512 to move towards the center of the second plug-in hole 420. The first guide part 421 can guide the second plug-in block 512 towards the center of the second plug-in hole 420. When the second plug-in block 512 enters the second plug-in hole 420, the second guide part 422 guides the direction of the second plug-in block 512 to continue moving. At the same time, the outward tilt of the second guide part 422 allows the second plug-in block 512 to gradually reduce its contact with the second guide part 422 as it continues to move, thereby reducing the friction between the second plug-in hole 420 and the second plug-in hole 420, making the plugging of the upper end 510 into the top cover 400 easier.

[0080] In some other embodiments, the second plug-in block 512 is first plugged into the second plug-in hole 420, and the first guide part 421 and the second guide part 422 may also be disposed on the first plug-in hole 410.

[0081] In a further preferred embodiment, such as Figures 5 to 7 As shown, the inclination of the first guide portion 421 is gentler than that of the second guide portion 422.

[0082] The small inclination of the first guide portion 421 helps to increase the guiding area of ​​the first guide portion 421 within a limited guiding length, thereby improving the guiding effect of the first guide portion 421; when the second plug block 512 is guided by the second guide portion 422, the included angle between the second plug block 512 and the second plug hole 420 decreases with the swing of the side cover 500, and the large inclination of the second guide portion 422 helps to match the angle at which the second plug block 512 is inserted into the second plug hole 420, further improving the guiding effect.

[0083] In this embodiment, the inclination of the first guide portion 421 and the second guide portion 422 remains unchanged in the insertion direction.

[0084] In some other embodiments, the inclination of the first guide portion 421 and the second guide portion 422 may also vary in the insertion direction, for example, the inclination gradually increases or gradually decreases.

[0085] In another preferred embodiment, such as Figures 4 to 7 As shown, the extending direction of the first insertion hole 410 is perpendicular to the extending direction of the second insertion hole 420.

[0086] In this way, the direction in which the first plug-in block 511 detaches from the top cover 400 and the direction in which the second plug-in block 512 detaches from the top cover 400 are also perpendicular to each other, further increasing the difficulty of the upper end 510 of the plug-in block detaching from the top cover 400 and improving the reliability of the plug-in connection between the side cover 500 and the top cover 400.

[0087] Further preferred, such as Figures 4 to 7 As shown, the first insertion hole 410 extends horizontally, and the second insertion hole 420 extends vertically.

[0088] This makes it easier to process or integrally form the first insertion hole 410 and the second insertion hole 420 on the top cover 400, which helps to reduce costs.

[0089] In this embodiment, the side cover 500 is made of plastic and is integrally molded by injection molding. The first plug block 511 and the second plug block 512 are integrally molded on the side cover 500.

[0090] In some other embodiments, the side cover 500 may also be a sheet metal part formed by stamping. The first plug block 511 and the second plug block 512 may be integrally formed on the side cover 500 by stamping or stretching, or they may be connected to the side cover 500 by welding or other fixed connection methods.

[0091] In one embodiment, based on all the foregoing embodiments, such as Figure 2 , Figures 4 to 7 , Figure 9 As shown, the top cover 400 has a support flange 430 in the circumferential direction. The upper surface of the support flange 430 forms a support surface 431 for supporting the side cover 500. The top cover 400 includes a first surface 401 that connects to the side cover 500. The support surface 431 is lower than the first surface 401.

[0092] The supporting flange 430 supports the upper end 510 of the side cover 500. The first surface 401 of the top cover 400 is used to connect with the upper end surface 501 of the side cover 500.

[0093] The support flange 430 is used to support the side cover 500. The upper end 510 is plugged into the top cover 400. The top cover 400 provides support force to the side cover 500 through the support flange 430, ensuring the reliability and stability of the plugged connection between the side cover 500 and the top cover 400.

[0094] In conjunction with the aforementioned embodiment where the side cover 500 and the top cover 400 are connected by a plug-in portion and a plug-in hole, the first plug-in hole 410 and the second plug-in hole 420 extend in different directions, and correspondingly, the first plug-in block 511 and the second plug-in block 512 protrude in different directions. The support surface 431 of the top cover 400 is lower than the first surface 401 of the top cover 400. The top cover 400 has a side surface between the first surface 401 and the support surface 431 for connecting the two, which facilitates placing one of the first plug-in hole 410 and the first plug-in block 511 on the side surface, and placing one of the second plug-in hole 420 and the second plug-in block 512 on the support surface 431, thereby achieving different extension directions for the first plug-in hole 410 and the second plug-in hole 420.

[0095] In this preferred embodiment, such as Figure 2 , Figures 4 to 7 , Figure 9 As shown, the first surface 401 is flush with the upper end surface 501 of the side cover 500.

[0096] The side cover 500 is plugged into the top cover 400. The upper end face 501 of the side cover 500 is flush with the first surface 401 of the top cover 400. This allows the operator to determine whether the side cover 500 is plugged in properly by touching the connection point of the side cover 500 and the top cover 400 after plugging them in. At the same time, the fact that the upper end face 501 of the side cover 500 is flush with the first surface 401 of the top cover 400 also makes the product more aesthetically pleasing.

[0097] In one embodiment, based on all the foregoing embodiments, such as Figures 1 to 3 , Figure 8 , Figures 10 to 15 As shown, the lower end 520 includes a third insertion block 521. The bottom plate 100 is provided with a third insertion hole 120 that engages with the third insertion block 521. The side cover 500 elastically deforms to allow the third insertion block 521 to be inserted into the third insertion hole 120. The restoring force of the side cover 500 restricts the third insertion block 521 from disengaging from the third insertion hole 120.

[0098] In this embodiment, the side cover 500 is made of a flexible plastic material. In some other embodiments, the side cover 500 may also be a sheet metal part.

[0099] The side cover 500 also includes a connecting plate 530, which connects from top to bottom between the upper end 510 and the lower end 520. The upper end 510 is inserted into the top cover 400. The third insertion block 521 is not aligned with the third insertion hole 120. The operator applies force to the connecting plate 530 to cause it to elastically deform, thereby aligning the third insertion block 521 with the third insertion hole 120, and the two are inserted to complete the insertion of the lower end 520 into the base plate 100. After the third insertion block 521 is inserted into the third insertion hole 120, the restoring force of the connecting plate 530 prevents the third insertion block 521 from disengaging from the third insertion hole 120.

[0100] The above settings simplify the plug-in connection between the lower end 520 and the base plate 100. The reset force of the side cover 500 provides a certain guarantee for the plug-in connection between the lower end 520 and the base plate 100, making it less likely for the third plug-in block 521 to detach from the third plug-in hole 120.

[0101] In some other embodiments, the elastic deformation of the lower end 520 may cause the third plug block 521 to be inserted into the third plug hole 120, and the restoring force of the lower end 520 may restrict the third plug block 521 from disengaging from the third plug hole 120.

[0102] The elastic deformation of the side cover 500 can be either elastic bending deformation or elastic torsional deformation.

[0103] In this embodiment, multiple third plug-in blocks 521 are provided, and multiple third plug-in holes 120 are provided accordingly. This arrangement helps to improve the stability and reliability of the plug-in connection between the lower end 520 and the base plate 100.

[0104] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 8 , Figure 10 , Figure 11 As shown, the third insertion hole 120 extends laterally, and the elastic reset of the side cover 500 causes at least a portion of the third insertion hole 521 to extend into the third insertion hole 120 along the elastic reset direction of the side cover 500.

[0105] In this embodiment, a boss 110 is provided on the base plate 100, and a third insertion hole 120 is provided in the boss 110 and extends horizontally. The side cover 500 elastically bends and deforms, so that at least a portion of the third insertion hole 521 extends into the third insertion hole 120 along the elastic return direction of the side cover 500. The elastic return of the side cover 500 also causes the lower end 520 to abut against the boss 110.

[0106] The third connector block 521 is a block-shaped protrusion, and the corresponding third connector hole 120 is a near-square hole.

[0107] In some other embodiments, the base plate 100 is partially recessed to form a receiving groove for receiving the lower end 520, and the third insertion hole 120 extends laterally through the groove wall. The side cover 500 is elastically bent and deformed such that at least a portion of the third insertion hole 521 extends into the third insertion hole 120 along the elastic reset direction of the side cover 500.

[0108] In some other embodiments, the side cover 500 may also be elastically torsional. For example, multiple third insertion holes 120 are provided, and correspondingly, multiple third insertion blocks 521 are also provided. The third insertion holes 120 are staggered on both sides of the lower end 520. The elastic torsional reset of the side cover 500 allows different third insertion blocks 521 to extend into different third insertion holes 120 respectively.

[0109] With this configuration, the third plug-in block 521 needs to overcome the elasticity of the side cover 500 to detach from the third plug-in hole 120, which increases the difficulty for the lower end 520 to detach from the base plate 100.

[0110] In another preferred embodiment, such as Figures 12 to 15 As shown, the third insertion hole 120 penetrates the base plate 100. A limiting rib 5211 protrudes radially from the end of the third insertion block 521. The limiting rib 5211 passes through the third insertion hole 120. The restoring force of the side cover 500 causes the wall surrounding the third insertion hole 120 to stop the limiting rib 5211 in the extending direction of the third insertion hole 120. The wall surrounding the third insertion hole 120 refers to the bottom wall of the base plate 100.

[0111] In this embodiment, the third insertion hole 120 is vertically formed on the base plate 100. The side cover 500 is elastically bent and deformed. The restoring force of the side cover 500 makes the third insertion block 521 closer to the hole wall on one side of the third insertion hole 120. As a result, the protruding limiting rib 5211 is stopped by the wall around the third insertion hole 120, thus restricting the third insertion block 521 from leaving the third insertion hole 120.

[0112] In some other embodiments, the side cover 500 may also be elastically torsional, and multiple third plug blocks 521 are provided, and multiple third plug holes 120 are provided accordingly. The limiting ribs 5211 on the multiple third plug blocks 521 protrude along the elastic torsional reset direction, thereby restricting the third plug hole 120 from disengaging from the third plug hole 120.

[0113] In some other embodiments, the third insertion hole 120 may also extend obliquely through the base plate 100.

[0114] With the above settings, the limiting rib 5211 on the third plug block 521 can be stopped by the surrounding wall of the third plug hole 120 under the restoring force of the side cover 500, thereby restricting the third plug block 521 from disengaging from the third plug hole 120 and improving the stability and reliability of the plug connection between the lower end 520 and the base plate 100.

[0115] In this embodiment, the third plug block 521 is a square columnar protrusion, and correspondingly, the third plug hole 120 is a square hole.

[0116] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. The main unit of an automatic mahjong machine includes a base plate, a shuffling drum, and a top cover, wherein the shuffling drum is mounted on the base plate, and the top cover is mounted on the upper end of the shuffling drum, characterized in that, It also includes multiple side covers, which are distributed circumferentially around the shuffling barrel. The upper end of each side cover is inserted into the top cover, and the lower end of each side cover is inserted into the bottom plate.

2. The main unit of the automatic mahjong machine as described in claim 1, characterized in that, It also includes several ring-shaped card pushing devices and several card feeding mechanisms. The ring-shaped card pushing devices are located at the corners of the base plate, and the several card feeding mechanisms are circumferentially spaced around the outer periphery of the shuffling barrel. The side cover covers at least part of the card feeding mechanisms.

3. The main unit of the automatic mahjong machine as described in claim 1, characterized in that, One of the upper end and the top cover includes a first plug-in block, and the other is provided with a first plug-in hole that is plugged into and engaged with the first plug-in block; One of the upper end and the top cover includes a second insertion block, and the other is provided with a second insertion hole that is inserted and engaged with the second insertion block; The extension direction of the first plug hole is different from the extension direction of the second plug hole.

4. The main unit of the automatic mahjong machine as described in claim 3, characterized in that, The first plug-in block is clearance-fitted with the first plug-in hole, and the second plug-in block is clearance-fitted with the second plug-in hole.

5. The main unit of the automatic mahjong machine as described in claim 4, characterized in that, One of the first insertion hole and the second insertion hole is provided with a first guide portion and a second guide portion along the insertion direction of the insertion block. The first guide portion extends obliquely from the outside to the inside along the insertion direction, and the second guide portion extends obliquely from one end of the first guide portion outward along the insertion direction.

6. The main unit of the automatic mahjong machine as described in claim 5, characterized in that, The inclination of the first guide is gentler than that of the second guide.

7. The main unit of the automatic mahjong machine as described in claim 3, characterized in that, The extension direction of the first insertion hole is perpendicular to the extension direction of the second insertion hole.

8. The main unit of the automatic mahjong machine as described in claim 7, characterized in that, The first insertion hole extends horizontally, and the second insertion hole extends vertically.

9. The main unit of the automatic mahjong machine as described in claim 1, characterized in that, The top cover has a circumferential support flange, and the upper surface of the support flange forms a support surface for supporting the side cover. The top cover includes a first surface that connects to the side cover, and the support surface is lower than the first surface.

10. The main unit of the automatic mahjong machine as described in claim 9, characterized in that, The first surface is flush with the upper surface of the side cover.

11. The main unit of the automatic mahjong machine as described in claim 1, characterized in that, The lower end includes a third insertion block, and the base plate is provided with a third insertion hole that engages with the third insertion block. The side cover elastically deforms to allow the third insertion block to be inserted into the third insertion hole, and the side cover elastically resets to prevent the third insertion block from disengaging from the third insertion hole.

12. The main unit of the automatic mahjong machine as described in claim 11, characterized in that, The third insertion hole extends laterally, and the elastic reset of the side cover causes at least a portion of the third insertion block to extend into the third insertion hole along the elastic reset direction of the side cover.

13. The main unit of the automatic mahjong machine as described in claim 11, characterized in that, The third insertion hole penetrates the base plate, and the end of the third insertion block has a radially protruding limiting rib. The limiting rib passes through the third insertion hole, and the side cover elastically resets so that the wall around the third insertion hole stops the limiting rib in the extending direction of the third insertion hole.

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