A mahjong machine with a stop mechanism for a tile scraper

Abstract

The utility model relates to mahjong machine technical field, concretely disclose a kind of scraper stop mechanism and mahjong machine, at least including center seat, shuffling large tray, scraper and stop mechanism;The scraper is located above shuffling large tray and is rotationally connected with center seat;The stop mechanism at least includes: stop portion, the bottom of the scraper is provided with at least one stop portion along the circumferential direction around center seat;Stop portion, the stop portion has the first state with the stop portion in the circumferential direction and the second state without interference with the stop portion;Stop driving mechanism, for driving the stop portion switches between the first state and the second state.The utility model in, scraper and shuffling large tray between no transmission mechanism, structure is simpler, and cost is lower;Stop mechanism is configured with independent stop driving mechanism, can control the working condition of stop mechanism at any time, and the timing that control scraper stops rotating is more flexible.

Description

Technical Field

[0001] This utility model relates to the field of mahjong machine technology, specifically to a card-scraping device stop mechanism and a mahjong machine. Background Technology

[0002] In traditional mahjong machines, the scraper is usually fixed. During shuffling, the shuffling disc rotates, and guided by the scraping arm on the scraper, the mahjong tiles in the center of the disc gradually move outwards to the placement area. However, this fixed scraper has drawbacks. In the initial stages of shuffling, due to the large number of mahjong tiles on the disc, the scraping arm experiences significant resistance, easily leading to damage and limiting its lifespan. Furthermore, the rapid outward movement of the tiles during shuffling causes them to accumulate at the placement area, resulting in lower placement efficiency and increased noise from the tiles colliding.

[0003] Based on this, the applicant's prior patent CN214485595U discloses a mahjong machine with a rotatable scraper. In the initial stage of shuffling, based on the transmission mechanism between the shuffling disc and the scraper, the shuffling disc drives the scraper to rotate at a differential speed relative to the shuffling disc, thereby slowing down the speed at which the mahjong tiles move to all sides and reducing the resistance borne by the scraper arm. In the later stage of shuffling, when there are fewer mahjong tiles on the shuffling disc, a limiting mechanism restricts the rotation of the scraper, thereby accelerating the speed at which the mahjong tiles move towards the top of the tile face.

[0004] The mahjong machine with a rotatable card scraper disclosed in the aforementioned patent solves the corresponding defects of the traditional fixed card scraper. However, the mahjong machine with a rotatable card scraper disclosed in this patent still has the following defects:

[0005] (1) A transmission mechanism is set between the card scraper and the shuffling disk. The card scraper rotates with the shuffling disk based on the drive system. The structure is relatively complex and the cost is high.

[0006] (2) During the shuffling process, the sliding speed of the mahjong tiles on the shuffling plate is random due to factors such as the size of the mahjong tiles and the speed at which they fall. In the above structure, the rotation speed of the scraper is determined based on the transmission ratio of the transmission mechanism and cannot flexibly cope with the random changes of the mahjong tiles.

[0007] (3) Due to the setting of the limiting mechanism, the number of rotations of the card scraper is constant and cannot effectively cope with the random changes of the mahjong tiles. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide a card scraper stop mechanism and a mahjong machine, which has the technical advantages of simple structure, low cost and more flexible timing for the card scraper to stop rotating.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a card scraper stop mechanism, comprising at least a central seat, a shuffling disc, a card scraper, and a stop mechanism; the shuffling disc is rotatably connected to the central seat and is equipped with a shuffling drive mechanism; the card scraper is located above the shuffling disc and is rotatably connected to the central seat; the stop mechanism comprises at least:

[0010] The bottom of the card scraper is provided with at least one stop portion along the circumferential direction surrounding the central seat;

[0011] The stop portion has a first state in which it intersects with the stop portion in the circumferential direction to prevent the card scraper from rotating, and a second state in which it does not interfere with the stop portion.

[0012] A stop drive mechanism is used to drive the stop part to switch between a first state and a second state.

[0013] In a preferred embodiment, the scratcher includes a scratching base and a scratching arm surrounding the scratching base. The bottom of the scratching base is provided with an inner sleeve for adapting and connecting with the central base and an outer sleeve located outside the inner sleeve.

[0014] In a preferred embodiment, the stop portion includes a baffle disposed on the outer wall of the inner sleeve, and the stop portion includes a first stop slider that moves in a vertical direction.

[0015] In a preferred embodiment, the first stop slider includes a first stop slider body, a stop end disposed at the upper end of the first stop slider body, and a first sliding part disposed at the lower end of the first stop slider body. A groove for accommodating the first stop slider is provided on one side of the center seat.

[0016] In a preferred embodiment, the stop drive mechanism includes a drive motor and a drive cam. The end face of the drive cam is provided with a first track groove for accommodating the first sliding part. The first track groove includes a track groove of equal diameter and a track groove of variable diameter. When the first sliding part is adapted to the track groove of equal diameter, the stop part is in a second state. When the first sliding part is adapted to the track groove of equal diameter, the stop part switches between the first state and the second state.

[0017] In a preferred embodiment, the stop portion includes a baffle disposed on the inner wall of the outer sleeve, and the stop portion includes a stop rocker arm, which includes a rocker arm body, a stop end disposed at one end of the rocker arm body, a hinge portion disposed at the other end of the rocker arm body, and a second sliding portion located between the stop end and the hinge portion. The stop rocker arm is hinged to the center seat through the hinge portion.

[0018] In a preferred embodiment, the stop drive mechanism includes a drive motor and a drive cam. The outer peripheral surface of the drive cam is provided with a second track groove for accommodating the second sliding part. The second track groove includes a track groove three that extends regularly along the circumferential direction and a track groove four that extends irregularly. When the second sliding part is adapted to the track groove three, the stop part is in a second state. When the second sliding part is adapted to the track groove four, the stop part switches between a first state and a second state.

[0019] In a preferred embodiment, the stop portion includes a stop recess disposed on the inner wall of the outer sleeve, the stop recess having an entry-side guide surface and a stop surface located on the opposite side of the entry-side guide surface.

[0020] In a preferred embodiment, the stop portion includes a radially movable second stop slider. The second stop slider includes a second stop slider body and a stop protrusion disposed at one end of the second stop slider body. A guide surface is provided on one side of the stop protrusion, and a stop surface for adapting to the stop surface is provided on the other side. A spring is disposed on the side of the second stop slider away from the stop protrusion. A sliding cavity for accommodating the second stop slider is provided on the central seat.

[0021] In a preferred embodiment, the bottom of the second stop slider is provided with a first guide portion, and the first guide portion is provided with a first guide surface.

[0022] In a preferred embodiment, the stop drive mechanism includes a drive motor, a drive cam, and a traction link vertically slidably connected to the center seat. The drive cam has a third track groove on its end face, comprising a track groove five of equal diameter and a track groove six of varying diameter. The traction link includes a link body, a second guide portion at one end of the link body, and a third sliding portion at the other end of the link body. The third sliding portion is adapted to and connected to the third track groove. When the third sliding portion is adapted to the track groove five, the stop portion is in a second state; when the third sliding portion is adapted to the track groove six, the stop portion switches between a first state and a second state.

[0023] In a preferred embodiment, multiple stop portions are distributed along the circumferential direction, and an area is formed between adjacent stop portions to accommodate the entry of the stop portion.

[0024] This utility model also discloses a mahjong machine, which includes at least the aforementioned card-scraping device stop mechanism.

[0025] The working principle of the scratch card stop mechanism of this utility model is as follows:

[0026] In the initial stage of shuffling, the stop part is in the second state where it does not interfere with the stop part. During the rotation of the shuffling disk, the scraper is driven to rotate relative to the shuffling disk based on the friction between the scraper arm and the shuffling disk. In the later stage of shuffling, when there are fewer mahjong tiles on the shuffling disk, the stop drive mechanism drives the stop part to switch to the first state that prevents the scraper from rotating, so that the scraper stops rotating, thereby accelerating the remaining mahjong tiles to move outward.

[0027] The scratch card stop mechanism of this utility model has the following advantages compared with the prior art:

[0028] (1) There is no transmission mechanism between the card scraper and the shuffling plate. The rotation is achieved by the friction between the scraper arm and the shuffling plate, which makes the structure simpler and the cost lower.

[0029] (2) The stop mechanism is equipped with an independent stop drive mechanism, which can control the working status of the stop mechanism at any time, making it more flexible to control the timing of stopping the card scraper. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the exploded state structure of the card scratcher stop mechanism described in Embodiment 1;

[0031] Figure 2 This is a schematic diagram of the scratcher structure in the scratcher stop mechanism described in Embodiment 1;

[0032] Figure 3 This is a schematic diagram of the structure of the central seat in the scratch card stop mechanism described in Embodiment 1;

[0033] Figure 4 This is a schematic diagram of the drive cam in the scratch card stop mechanism described in Embodiment 1;

[0034] Figure 5 This is a schematic diagram of the structure of the first stop slider in the scratch card stop mechanism described in Embodiment 1;

[0035] Figure 6 This is a schematic diagram of the stop lever in the first state of the scratcher stop mechanism described in Embodiment 1;

[0036] Figure 7 This is a schematic diagram of the first stop slider in the first state of the scratch card stop mechanism described in Embodiment 1;

[0037] Figure 8 This is a schematic diagram of the exploded state structure of the card scratcher stop mechanism described in Embodiment 2;

[0038] Figure 9 This is a schematic diagram of the stop lever in the first state of the scratch card stop mechanism described in Embodiment 2;

[0039] Figure 10 This is a schematic diagram of the card scraper structure in the card scraper stop mechanism described in Embodiment 2;

[0040] Figure 11 This is a schematic diagram of the drive cam in the scratch card stop mechanism described in Embodiment 2;

[0041] Figure 12 This is a schematic diagram of the stop lever in the stop mechanism of the card scratcher described in Embodiment 2;

[0042] Figure 13 This is a schematic diagram of the exploded state structure of the card scratcher stop mechanism described in Embodiment 3;

[0043] Figure 14 This is a schematic diagram of the second stop slider in the second state of the scratch card stop mechanism described in Embodiment 3;

[0044] Figure 15 for Figure 14 A schematic diagram of the stop mechanism in the shown state;

[0045] Figure 16 This is a schematic diagram of the second stop slider in the first state of the scratch card stop mechanism described in Embodiment 3;

[0046] Figure 17 for Figure 16 A schematic diagram of the stop mechanism in the shown state;

[0047] Figure 18 This is a schematic diagram of the structure of the second stop slider and the stop recess in the card scratcher stop mechanism described in Embodiment 3;

[0048] Figure 19 This is a schematic diagram of the card scraper structure in the card scraper stop mechanism described in Embodiment 3;

[0049] Figure 20 This is a schematic diagram of the drive cam in the scratch card stop mechanism described in Embodiment 3;

[0050] Figure 21 This is a schematic diagram of the structure of the second stop slider in the scratch card stop mechanism described in Embodiment 3;

[0051] Figure 22 This is a schematic diagram of the traction link in the scratch card stop mechanism described in Embodiment 3. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0053] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", 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.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0055] Example 1

[0056] This embodiment describes a card-scraping device stop mechanism applied in a mahjong machine, such as... Figure 1 As shown, it includes a central base 30, a shuffling disk 20, a card scraper 10, and a stop mechanism. The shuffling disk 20 is rotatably connected to the central base 30 and is equipped with a shuffling drive mechanism. This shuffling disk drive mechanism is a mature technology in the field and will not be described in detail here.

[0057] As a special feature of this embodiment, the card scraper 10 is located above the shuffling tray 20, and the card scraper 10 is rotatably connected to the center seat 30. The method of rotatably connecting the card scraper 10 and the center seat 30 is not limited in this embodiment. For example, preferably, the rotatable connection can be achieved through a bearing.

[0058] like Figure 2 As shown, in this embodiment, the card scratcher 10 includes a card scratching base 11 and a scratching arm 12 arranged around the card scratching base 11. The bottom of the card scratching base 11 is provided with an inner sleeve 13 for adapting and connecting with the center seat 30 and an outer sleeve 14 located outside the inner sleeve.

[0059] As a special feature of this embodiment, the stopping mechanism includes a stop portion, a stopping portion, and a stopping drive mechanism. The stop portion is disposed at the bottom of the scratcher 10. The stopping portion has a first state in which it intersects with the stop portion in the circumferential direction to prevent the scratcher from rotating, and a second state in which it does not interfere with the stop portion. The stopping drive mechanism is used to drive the stopping portion to switch between the first and second states.

[0060] As a preferred option, such as Figure 2As shown, in this embodiment, the stop portion includes a plurality of baffles 15 arranged circumferentially on the outer wall of the inner sleeve. It should be noted that the number of baffles 15 can be one or more; this embodiment does not limit the specific number. When there are multiple baffles 15, an area 16 is formed between adjacent baffles 15 to accommodate the entry of the stop portion. When there is only one baffle 15, the annular spaces on both sides of the baffle 15 constitute an area to accommodate the entry of the stop portion. The more baffles 15 there are, the more opportunities there are to stop the rotation of the card scraper 10, resulting in more flexible control.

[0061] In this embodiment, as Figure 1 , Figures 5-7 As shown, the stop portion includes a first stop slider 42 that moves in the vertical direction, such as... Figure 3 As shown, a groove 32 for accommodating the first stop slider 42 is provided on one side of the center seat 30.

[0062] like Figure 5 As shown, in this preferred embodiment, the first stop slider 42 includes a first stop slider body 421, a stop end 423 disposed at the upper end of the first stop slider body, and a first sliding part 422 disposed at the lower end of the first stop slider body.

[0063] As a preferred embodiment, in this case, Figure 1 As shown, the stop drive mechanism includes a drive motor 40 and a drive cam 41, wherein the drive motor 40 is mounted on the motor mounting part 31 on the center seat 30.

[0064] In this embodiment, as Figure 4 As shown, the end face of the drive cam 41 is provided with a connecting hole 411 for connecting to the output shaft of the drive motor and a first track groove 412 for accommodating the first sliding part 422. The first track groove 412 includes a track groove one 4121 with equal diameter and a track groove two 4122 with varying diameter. When the first sliding part 422 is adapted to the track groove one 4121, as... Figure 6 As shown, the first stop slider 42, which serves as a stop part, is in the second state. When the first sliding part 422 is adapted to the second track groove 4122, the first stop slider 42, which serves as a stop part, switches between the first state and the second state, as shown. Figure 7 As shown, in this state, the first stop slider 42 is in the first state, used to limit the rotation of the card scratcher 10.

[0065] It should be noted that in this embodiment, the first sliding part 422 can be a rolling element, such as a bearing, or a pin, which is slidably connected to the first track groove.

[0066] It should be noted that in this embodiment, the drive motor 40 can be used only to drive the stop part, or it can drive the stop part and the central lifting rod 50 respectively based on forward and reverse rotation. This embodiment does not impose a unique limitation on it.

[0067] In this embodiment, during the initial stage of shuffling, the stop part is in a second state where it does not interfere with the stop part. During the rotation of the shuffling disc, the scraper rotates relative to the shuffling disc due to the friction between the scraper arm and the shuffling disc. In the later stage of shuffling, when there are fewer mahjong tiles on the shuffling disc, the stop drive mechanism drives the stop part to switch to a first state that prevents the scraper from rotating, thus stopping the scraper from rotating and accelerating the movement of the remaining mahjong tiles to the outer periphery. The timing of the stop drive mechanism switching the stop part's state can be flexibly chosen by those skilled in the art. For example, the system can be set to start the drive motor in the stop drive mechanism after a set time has elapsed after the start of shuffling, or a monitoring sensor can be installed inside the mahjong machine to start the drive motor based on the number of remaining mahjong tiles on the shuffling disc. In short, this embodiment does not limit the starting method or timing, and those skilled in the art can freely choose according to their needs.

[0068] Example 2

[0069] like Figures 8-12 As shown, the difference between this embodiment and Embodiment 1 is that the stopping mechanism is different in Embodiment 1. Specifically, as... Figure 10 As shown, in this embodiment, the stop portion includes a plurality of baffles 15 disposed on the inner wall of the outer sleeve 14, and an interval 16 is formed between adjacent baffles 15 to accommodate the entry of the stop portion.

[0070] In this embodiment, as Figure 8 , Figure 9 , Figure 12 As shown, the stopping part includes a stopping rocker arm 43, which includes a rocker arm body 431, a stopping end 433 disposed at one end of the rocker arm body, a hinge part 432 disposed at the other end of the rocker arm body, and a second sliding part 434 located between the stopping end and the hinge part. The stopping rocker arm 43 is hinged to the center seat 30 via the hinge part 432.

[0071] In this embodiment, as Figure 8 , Figure 9 , Figure 11 As shown, the stop drive mechanism includes a drive motor 40 and a drive cam 41. The outer circumferential surface of the drive cam 41 is provided with a second track groove 413 for accommodating the second sliding part 434. The second track groove 413 includes a track groove three 4131 extending regularly along the circumferential direction and a track groove four 4132 extending irregularly.

[0072] In this embodiment, the drive motor 40 rotates, causing the drive cam 41 to rotate. When the second sliding part 432 is adapted to the track groove 4131, the stop rocker arm 43, which serves as a stop part, is in a second state where it does not interfere with the baffle 15. When the second sliding part 432 is adapted to the track groove 4132, the stop rocker arm 43, which serves as a stop part, swings around the hinge and switches between the first and second states. Figure 9 The image shows the first state in which the stop lever 43 is interfering with the baffle 15. In this state, the card scraper stops rotating due to the obstruction of the stop part.

[0073] Example 3

[0074] This embodiment describes a card-scraping device stop mechanism applied in a mahjong machine, such as... Figure 13-22 As shown, the difference from Embodiment 1 and Embodiment 2 lies in the different structure of the stop mechanism.

[0075] Specifically, such as Figure 13 As shown, in this embodiment, the center seat 30 is disposed on the base 33, and the drive motor 40 is mounted on one side of the base 33.

[0076] In this embodiment, the structure of the scratch card device 10 is as follows: Figure 19 As shown, the stop portion includes a stop recess 17 disposed on the inner wall of the outer sleeve 14. The stop recess 17 is provided with an entry-side guide surface 18 and a stop surface 19 located on the opposite side of the entry-side guide surface. It should be noted that the stop recess 17 can be provided in one or multiple ways. When multiple stops are provided, there are more opportunities to drive the card scraper to stop rotating, and the control is more flexible.

[0077] like Figures 13-17 , Figure 21 As shown, in this embodiment, the stop portion includes a radially movable second stop slider 44. Preferably, the second stop slider 44 includes a second stop slider body 441 and a stop protrusion 442 disposed at one end of the second stop slider body 441. The stop protrusion 442 has a guide surface 445 on one side and a stop surface 446 for fitting with the stop surface 19 on the other side. A spring 46 is disposed on the side of the second stop slider 44 away from the stop protrusion. Preferably, the second stop slider body 441 has a spring mounting cavity 447, in which the spring 46 is mounted, and its other end rests against the center seat 30.

[0078] In this embodiment, the center seat 30 is provided with a sliding cavity 35 for accommodating the second stop slider 44. Preferably, in this embodiment, a housing 34 for mounting the drive motor 40 is also included, and the sliding cavity 35 is disposed on the housing 34.

[0079] In this embodiment, under natural conditions, such as Figure 16 , Figure 17 As shown, under the elastic action of spring 46, the stop protrusion 442 of the second stop slider 44 extends out of the sliding cavity 35. In this state, as... Figure 18 As shown, the stop protrusion 442 enters the stop recess 17, and based on the interaction between the stop surface 446 and the stop surface 19, the card scraper cannot rotate in the stop direction.

[0080] As a preferred embodiment, in this case, Figure 21 As shown, the bottom of the second stop slider 43 is provided with a first guide part 443, and the first guide part 443 is provided with a first guide surface 444.

[0081] Preferably, in this embodiment, the stop drive mechanism includes a drive motor 40, a drive cam 41, and a traction link 45 that is vertically slidably connected to the center seat 30. Wherein, as... Figure 20 As shown, a third track groove 414 is provided on the end face of the drive cam 41. The third track groove 414 includes a track groove five 4141 with equal diameter and a track groove six 4142 with variable diameter.

[0082] In this embodiment, as Figure 22 As shown, the traction link 45 includes a link body 451, a second guide portion 453 disposed at one end of the link body, and a third sliding portion 452 located at the other end of the link body. The third sliding portion 452 is adapted to and connected to the third track groove 414.

[0083] In this embodiment, when the third sliding part 452 is adapted to the trajectory groove 4141, such as Figure 14 , Figure 15 As shown, based on the stop link 45 being in a high position, and based on the interaction between the second guide part 453 and the first guide part 443, the second stop slider 44 is confined in the sliding cavity 35, and the spring 46 is in a compressed state. In this state, the second stop slider 44 does not restrict the rotation of the scratcher 10. When it is necessary to stop the scratcher 10, the drive motor 40 rotates, driving the drive cam 41 to rotate. When the third sliding part is adapted to the track groove, it drives the stop link 45 downward, releasing the restriction on the second stop slider 44. When the scratcher 10 rotates to the position of the stop recess 17 corresponding to the position of the second stop slider 44, based on the elastic force of the spring 46, as... Figure 18 As shown, the stop protrusion 442 enters the stop recess 17, and based on the interaction between the stop surface 446 and the stop surface 19, the card scraper cannot rotate in the stop direction.

[0084] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A scratch card stop mechanism, characterized in that, It includes at least a center seat, a shuffling tray, a card scraper, and a stop mechanism. The shuffling tray is rotatably connected to the center seat and is equipped with a shuffling drive mechanism. The card scraper is located above the shuffling tray and is rotatably connected to the center seat. The stop mechanism includes at least: The bottom of the card scraper is provided with at least one stop portion along the circumferential direction surrounding the central seat; The stop portion has a first state in which it intersects with the stop portion in the circumferential direction to prevent the card scraper from rotating, and a second state in which it does not interfere with the stop portion. A stop drive mechanism is used to drive the stop part to switch between a first state and a second state.

2. The scratch card stop mechanism according to claim 1, characterized in that, The card scratcher includes a card scratching base and a scratching arm surrounding the card scratching base. The bottom of the card scratching base is provided with an inner sleeve for fitting and connecting with the central base, and an outer sleeve located outside the inner sleeve.

3. The scratch card stop mechanism according to claim 2, characterized in that, The stop portion includes a baffle plate disposed on the outer wall of the inner sleeve, and the stop portion includes a first stop slider that moves in the vertical direction.

4. The scratch card stop mechanism according to claim 3, characterized in that, The first stop slider includes a first stop slider body, a stop end disposed at the upper end of the first stop slider body, and a first sliding part disposed at the lower end of the first stop slider body. A groove for accommodating the first stop slider is provided on one side of the center seat.

5. The scratch card stop mechanism according to claim 4, characterized in that, The stop drive mechanism includes a drive motor and a drive cam. The end face of the drive cam is provided with a first track groove for accommodating the first sliding part. The first track groove includes a track groove of equal diameter and a track groove of variable diameter. When the first sliding part is adapted to the track groove of equal diameter, the stop part is in a second state. When the first sliding part is adapted to the track groove of equal diameter, the stop part switches between the first state and the second state.

6. The scratch card stop mechanism according to claim 2, characterized in that, The stop portion includes a baffle plate disposed on the inner wall of the outer sleeve, and the stop portion includes a stop rocker arm. The stop rocker arm includes a rocker arm body, a stop end disposed at one end of the rocker arm body, a hinge portion disposed at the other end of the rocker arm body, and a second sliding portion located between the stop end and the hinge portion. The stop rocker arm is hinged to the center seat through the hinge portion.

7. The scratch card stop mechanism according to claim 6, characterized in that, The stop drive mechanism includes a drive motor and a drive cam. The outer peripheral surface of the drive cam is provided with a second track groove for accommodating the second sliding part. The second track groove includes a track groove three that extends regularly along the circumferential direction and a track groove four that extends irregularly. When the second sliding part is adapted to the track groove three, the stop part is in a second state. When the second sliding part is adapted to the track groove four, the stop part switches between a first state and a second state.

8. The scratch card stop mechanism according to claim 2, characterized in that, The stop portion includes a stop recess disposed on the inner wall of the outer sleeve, the stop recess being provided with an entry-side guide surface and a stop surface located on the opposite side of the entry-side guide surface.

9. The scratch card stop mechanism according to claim 8, characterized in that, The stop portion includes a radially movable second stop slider. The second stop slider includes a second stop slider body and a stop protrusion disposed at one end of the second stop slider body. A guide surface is provided on one side of the stop protrusion, and a stop surface for adapting to the stop surface is provided on the other side. A spring is disposed on the side of the second stop slider away from the stop protrusion. A sliding cavity for accommodating the second stop slider is provided on the central seat.

10. The scratch card stop mechanism according to claim 9, characterized in that, The bottom of the second stop slider is provided with a first guide part, and the first guide part is provided with a first guide surface.

11. The scratch card stop mechanism according to claim 10, characterized in that, The stop drive mechanism includes a drive motor, a drive cam, and a traction link that is vertically slidably connected to the center seat. The end face of the drive cam is provided with a third track groove, which includes a track groove five with equal diameter and a track groove six with variable diameter. The traction link includes a link body, a second guide part provided at one end of the link body, and a third sliding part located at the other end of the link body. The third sliding part is adapted to the third track groove. When the third sliding part is adapted to the track groove five, the stop part is in a second state. When the third sliding part is adapted to the track groove six, the stop part switches between the first state and the second state.

12. The scratch card stop mechanism according to any one of claims 3-11, characterized in that, The stop portions are distributed in multiple ways along the circumference, and an area is formed between adjacent stop portions to accommodate the entry of the stop portion.

13. A mahjong machine, characterized in that, It includes at least the scratcher stop mechanism as described in any one of claims 1-12.

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