Low-noise mahjong machine and conveying assembly thereof

Abstract

The utility model discloses a low-noise mahjong machine and a conveying assembly thereof, the conveying assembly comprises a conveying support, a conveying channel is formed in the conveying support, the conveying support is provided with a noise reduction structure located at the starting end of the conveying channel, and the noise reduction structure is arranged on the conveying support. The noise reduction structure is provided with a containing position for the mahjong tiles to enter the conveying channel conveniently and a blocking position for preventing the mahjong tiles entering the conveying channel from retreating. The noise reduction structure is arranged at the starting end of the conveying channel and has two working states, so that normal conveying of the mahjong tiles is not affected, the phenomenon that the last hidden tile repeatedly impacts the previous hidden tile due to attraction of the tile attraction wheel can be avoided, and the noise reduction and removal effects are achieved during tile hiding.

Description

Technical Field

[0001] The utility model belongs to the technical field of mahjong machines, and in particular relates to a low-noise mahjong machine and a conveying component thereof. Background Art

[0002] In order to ensure that the stacking mechanisms on all four sides of the mahjong machine complete the card encoding operation at the same time so that all the card loading mechanisms can load cards at the same time, when there are only a few mahjong tiles left on the shuffling plate, the mahjong machine will first suspend the work of all the stacking and pushing heads. At this time, the mahjong tiles picked up by the card suction wheel are first stored in the conveying channel until the storage number of mahjong tiles in the conveying channels of each party reaches the preset value. At this time, the stacking and pushing heads on all four sides will be restarted to stack the mahjong tiles stored in the conveying channels into card piles in a coordinated manner.

[0003] Although the number of hidden cards can be set arbitrarily, the total length of the hidden cards is usually set to be equivalent to the length of the conveying channel to ensure that the number of hidden cards of each party is the same, such as the Chinese utility model patents with publication numbers CN220632961U and CN204307340U. At this time, the mahjong tiles hidden at the end of the conveying channel are close to the card suction wheel; however, although the number of hidden cards in the conveying channel has reached the preset value, the card suction wheel will continue to rotate before the shuffling is completed; as is known to all, several card suction magnets are generally arranged at intervals on the card suction wheel, so when the card suction wheel rotates, the card suction magnets will approach the mahjong tiles at the starting end of the conveying channel (i.e., the end close to the card suction wheel) one by one, generating suction force on the mahjong tiles, causing the mahjong tiles to continuously "retreat (attracted by the card suction magnet)-advance (after the card suction magnet leaves)", and produce collision noise with the mahjong tiles in front of it. Utility Model Content

[0004] The invention aims to provide a low-noise mahjong machine and a conveying component thereof, so that when hiding the cards, the mahjong cards in the conveying channel will not be attracted and released by the card suction wheel in turn to generate collision noise.

[0005] In order to achieve the above-mentioned invention object, the technical solution of the utility model is as follows:

[0006] A conveying assembly of a low-noise mahjong machine includes a conveying bracket, a conveying channel is formed in the conveying bracket, and a noise reduction structure is provided on the conveying bracket at the starting end of the conveying channel. The noise reduction structure has an intake position for facilitating the entry of mahjong tiles into the conveying channel and a blocking position for preventing the mahjong tiles that have entered the conveying channel from retreating.

[0007] The utility model sets a noise reduction structure at the starting end of the conveying channel, and the noise reduction structure has two working states, namely, the receiving position and the blocking position. In the whole process of conveying and hiding mahjong tiles, the two working states can occur successively or cyclically, which mainly depends on the driving force source that causes the working state of the noise reduction structure to change.

[0008] When the driving force that causes the noise reduction structure to change its working state mainly comes from mahjong tiles (at this time, the mahjong tiles are adsorbed on the card suction wheel, and only in this way can the mahjong tiles have thrust), the noise reduction structure is naturally in the blocking position. Whenever a mahjong tile wants to enter the conveying channel, the mahjong tile prompts the noise reduction structure to change from the blocking position to the receiving position. After the mahjong tile enters the conveying channel, the noise reduction structure automatically returns to the blocking position, and the cycle continues. When the number of hidden tiles in the conveying channel reaches the preset value, the noise reduction structure is in the blocking position, which prevents the last hidden tile from being attracted by the card suction wheel.

[0009] When the driving force that causes the noise reduction structure to change its working state does not come from mahjong tiles, when the conveying channel is conveying mahjong tiles normally, the noise reduction structure remains in the receiving position, and the mahjong tiles can enter the conveying channel freely; when the conveying channel hides tiles, the noise reduction structure initially remains in the receiving position, and only when the last hidden card enters the conveying channel, the noise reduction structure switches to the blocking position to prevent the last hidden card from being attracted by the card suction wheel and retreating.

[0010] What is certain is that no matter which specific working mode the noise reduction structure adopts, it can ensure that the last hidden card will not repeatedly collide with the previous hidden card due to the attraction of the card suction wheel, so it can ultimately play a role in reducing noise when hiding cards.

[0011] In the above-mentioned conveying assembly, the conveying bracket is rotatably connected to a card-absorbing wheel located at the starting end of the conveying channel, and the noise reduction structure is arranged above or to the side of the card-absorbing wheel or below the conveying channel. The utility model has no special requirements for the position of the noise reduction structure, but the specific form and specific working principle of the noise reduction structure will be different when it is in different positions.

[0012] The utility model briefly provides several noise reduction structures with different forms and working principles.

[0013] First, the noise reduction structure includes at least one swinging member, which is movably connected to the conveying bracket through a hinge shaft in a manner with a limited swing amplitude; the free end of the swinging member extends into the conveying channel. It can be seen that in the conveying direction of mahjong tiles, the swinging of the swinging member should be unrestricted; but in the reverse direction, the swinging of the swinging member is restricted to achieve the purpose of preventing the last hidden card from retreating toward the card suction wheel.

[0014] There are various ways to limit the swing amplitude of the swing member. For example, a swing limiting member is provided between the swing member and the conveying support to prevent or limit the swing member from swinging toward the starting end of the conveying channel.

[0015] The swing limiting member includes a one-way bearing provided on the hinge shaft, or a first limiting member provided on the swing path of the swinging member;

[0016] Alternatively, the free end of the swinging member cannot continue to swing toward the starting end of the conveying channel due to interference with the inner peripheral wall of the conveying channel. The inner peripheral wall of the conveying channel mainly refers to the side and bottom surface (conveying surface) of the conveying channel.

[0017] This type of noise reduction structure can be arranged above or on the side of the card suction wheel. The form of the noise reduction structure is different at different positions.

[0018] The first form is: the swing member is arranged above the card suction wheel, and the swing member returns to the blocking position by gravity after the mahjong tiles pass through. That is, the free end of the swing member is freely hanging down by gravity and is in the blocking position. When the mahjong tiles pass through, the free end of the swing member is pushed forward (the swing member is in the receiving position at this time). After the mahjong tiles pass through, the force applied to the swing member disappears, and the swing member returns to the blocking position. It can be seen that in this form, the driving force that causes the swing member to change its working state comes from the mahjong tiles; therefore, as long as there are still tiles hidden in the conveying channel, the swing member can be transferred from the blocking position to the receiving position.

[0019] The second form is: the swinging member is arranged above or on the side of the card suction wheel, and an elastic structure is arranged between the swinging member and the conveying bracket to enable the swinging member to have a swinging tendency toward the blocking position; the mahjong cards enter the conveying channel due to the reaction force applied to the swinging member to overcome its swinging tendency.

[0020] When the swinging member is set on the side of the card suction wheel and is pushed to the receiving position by the mahjong tiles, the swinging member cannot return to the blocking position by its own gravity. At this time, an elastic structure can be set. It should be noted that the swinging tendency of the elastic structure should be smaller than the reaction force exerted on the swinging member by the mahjong tiles when they move forward. How to ensure that the mahjong tiles can smoothly pass through the noise reduction structure and enter the conveying channel.

[0021] When the swinging member is arranged above the card suction wheel, an elastic structure may also be arranged. In addition to the elastic structure, the swinging of the swinging member may also be controlled by utilizing the power-on or power-off state of the electromagnetic assembly.

[0022] The third form: the fixed end of the swinging member is provided with a first permanent magnet, and the conveying bracket is provided with a first electromagnetic component;

[0023] The swinging member is arranged above or beside the card suction wheel, and the first electromagnetic component has a power-off state to put the swinging member in the receiving position, and a power-on state to attract the first permanent magnet to put the swinging member in the blocking position.

[0024] That is, when the first electromagnetic component is powered off, it will not attract the first permanent magnet. At this time, the swinging member is only hinged to the conveying bracket. Therefore, during this process, the swinging member always remains in the receiving position (the swinging member is on the side of the card suction wheel) or hangs freely and can swing arbitrarily (the swinging member is above the card suction wheel); until the last hidden card enters the conveying channel, the first electromagnetic component will be energized and attract the first permanent magnet on the swinging member, so that the swinging member switches from the receiving position to the blocking position (the swinging member is on the side of the card suction wheel) or is in the blocking position because it cannot swing (the swinging member is above the card suction wheel, at this time, the first electromagnetic component plays the role of the above-mentioned swing limiting member).

[0025] Alternatively, a second permanent magnet is provided at the free end or vertex of the swinging member, and a second electromagnetic component is provided on the conveying bracket;

[0026] The swinging member is arranged above the card suction wheel, and the second electromagnetic component has the function of attracting the second permanent magnet to put the swinging member in a power-on state of receiving position, and releasing the first permanent magnet to put the swinging member in a power-off state of blocking position.

[0027] Since the second permanent magnet and the first permanent magnet are located in different positions, the working principles of the second electromagnetic assembly and the first electromagnetic assembly are also different. Before the first mahjong tile enters the conveying channel, the swing member hangs freely due to gravity. When the first mahjong tile enters, it pushes the swing member forward, so that the second permanent magnet attracts the second electromagnetic assembly in the energized state. At this time, the swing member is in the receiving position; after the last hidden card enters the conveying channel, the second electromagnetic assembly is powered off and cannot attract the second permanent magnet. At this time, the swing member hangs down again due to gravity and switches to the blocking position.

[0028] Preferably, in the above-mentioned conveying assembly, the swinging member is concave on one side toward the conveying passage so that the mahjong tiles can contact the far end of the swinging member as much as possible; thus, the contact time between the mahjong tiles and the swinging member is short, and the mahjong tiles can pass quickly;

[0029] The conveying bracket is formed with a through groove connected to the conveying channel, and the through groove completely or partially penetrates the conveying bracket;

[0030] The swinging member in the receiving position is partially or completely received in the through slot, or passes through the through slot in whole or in part; thus, the swinging member can be prevented from occupying the inner space of the conveying channel.

[0031] Preferably, in the above-mentioned conveying assembly, the conveying bracket is further provided with a second limiter for limiting the swing end point of the swinging member in the receiving position. The swing amplitude of the swinging member from the blocking position to the end point of the receiving position is consistent with the height of the mahjong tiles. Therefore, limiting the swing end point of the swinging member in the receiving position can, on the one hand, limit the mahjong tile models that can be used for mahjong tiles, and on the other hand, avoid excessive reaction force exerted by the mahjong tiles on the swinging member.

[0032] Second, the noise reduction structure comprises at least one elastic damping member, which is made of a soft elastic material or has at least one elastic deformation portion made of a soft elastic material;

[0033] The mahjong tiles are put into the conveying channel by applying a reaction force to the elastic damping member to make the elastic damping member or the elastic deformation part elastically deform.

[0034] This approach can be used when the noise reduction structure is disposed on the side of the card suction wheel.

[0035] Thirdly, a roller is rotatably connected to the conveying bracket, a conveying belt is wound between the roller and the card suction wheel, and the conveying channel is formed above the conveying belt;

[0036] The noise reduction structure includes a third electromagnetic component arranged below the conveyor belt. The third electromagnetic component in the receiving position is not energized to allow mahjong tiles to pass freely. The third electromagnetic component in the blocking position is energized to absorb mahjong tiles to prevent the mahjong tiles from being attracted by the card suction wheel.

[0037] The utility model also provides a low-noise mahjong machine, which comprises the above-mentioned conveying assembly.

[0038] Compared with the prior art, the advantages of the technical solution of the utility model are:

[0039] The utility model arranges a noise reduction structure at the starting end of the conveying channel, and the noise reduction structure has two working states, namely, an intake position for facilitating the entry of mahjong tiles into the conveying channel and a blocking position for preventing the mahjong tiles that have entered the conveying channel from retreating. This will not affect the normal conveying of the mahjong tiles, and can ensure that the last hidden tile will not repeatedly collide with the previous hidden tile due to the attraction of the card suction wheel, thereby playing the role of reducing noise when hiding tiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a structural schematic diagram of a conveying assembly of a low-noise mahjong machine of the utility model (incorporated into position);

[0041] Figure 2 This is a structural schematic diagram of a conveying assembly of a low-noise mahjong machine of the utility model from another perspective (incorporated);

[0042] Figure 3 This is a structural schematic diagram of a conveying assembly of a low-noise mahjong machine of the utility model from another perspective (blocking position);

[0043] Figure 4 This is a schematic diagram of a partial exploded structure of a conveying assembly of a low-noise mahjong machine of the utility model;

[0044] Figure 5 This is a schematic diagram of a partial exploded structure of a conveying assembly of a low-noise mahjong machine of the utility model;

[0045] Figure 6 The utility model is a cross-sectional view of a conveying component of a low-noise mahjong machine. DETAILED DESCRIPTION

[0046] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] Example 1

[0048] like Figure 1 and Figure 2 As shown, the conveying assembly of a low-noise mahjong machine in this embodiment includes a conveying bracket 1, a conveying channel 100 is formed in the conveying bracket 1, and a card suction wheel 2 is rotatably connected to the conveying bracket 1 at the starting end of the conveying channel 100. The card suction wheel 2 picks up mahjong cards from the shuffling plate and sends them to the card stacking seat at the end of the conveying channel 100 through the conveying channel 100. The conventional composition of the conveying assembly can be adopted from the prior art, and this embodiment will not be described in detail.

[0049] like Figure 3 Shown, combined Figure 1 and Figure 2 It can be seen that a noise reduction structure 3 is arranged on the conveying bracket 1. When the conveying channel 100 is used to hide cards, the noise reduction structure 3 is used to prevent the last hidden card from being repeatedly "attracted and released" due to the continuous operation of the card suction wheel 2, and then making repeated "backward and forward" movements, resulting in the last hidden card and the previous hidden card to produce collision noise.

[0050] like Figure 4 and Figure 5 Shown, combined Figure 3 It can be seen that the noise reduction structure 3 includes a swinging member 31 disposed above the card suction wheel 2 . The swinging member 31 is movably connected to the conveying bracket 1 via a hinge shaft 31 a . The free end of the swinging member 31 extends into the conveying channel 100 .

[0051] In this embodiment, the swing member 31 has two working states, namely, the in-position state (such as Figure 1 and Figure 2 ) and blocking positions (such as Figure 3 ).like Figure 3 As shown, when the card suction wheel 2 does not pick up a card, the swing member 31 naturally hangs down due to gravity and is in a blocking position; when the card suction wheel 2 picks up a mahjong tile and tries to send it to the conveying channel 100, the mahjong tile adsorbed on the card suction wheel 2 will apply a thrust to the swing member 31, causing the swing member 31 to swing upward until the mahjong tile can pass through, and the swing member 31 is in the receiving position at this time; after the mahjong tile passes, the swing member 31 swings downward again and returns to the blocking position; after this reciprocating, after the last hidden card enters the conveying channel 100, the swing member 31 returns to the blocking position again, forming a physical partition between the hidden card and the card suction wheel 2 to prevent the hidden card from being attracted by the card suction wheel 2.

[0052] It can be seen that the swing member 31 in the receiving position swings up due to being pushed by the mahjong tiles, and the thrust of the mahjong tiles first comes from the attraction of the card-absorbing wheel 2 to the mahjong tiles, and then comes from the thrust of the card-absorbing wheel 2; although the swing member 31 in the blocking position is not subject to any external force, it should try to avoid swinging toward the card-absorbing wheel 2, otherwise the swing member 31 will hardly play the role of blocking the hidden cards.

[0053] Therefore, if Figure 5 As shown, in order to limit the swing amplitude of the swing member 31, a second limit member 32 and a first limit member 11 are respectively provided on the upper and lower sides of the fixed end of the swing member 31; wherein the second limit member 32 is used to limit the maximum upward swing amplitude of the swing member 31, and the first limit member 11 is used to prevent the swing member 31 from swinging toward the card suction wheel 2.

[0054] In this embodiment, the first limiting member 11 and the second limiting member 32 are both arranged near the fixed end of the swinging member 31 , but in principle, the positions and specific structures of the two are not unique, as long as they can play the role of limiting the swinging member 31 .

[0055] like Figure 6 Shown, combined Figure 5 It can be seen that in this embodiment, the first stopper 11 is located below the swing member 31, and is integrally formed with the conveying bracket 1 and arranged at the edge of the through slot 200; the swing member 31 in the blocking position is placed on the first stopper 11. The second stopper 32 is located above the swing member 31, and is detachably fixedly connected to the conveying bracket 1; specifically, the conveying bracket 1 is formed with a first shaft hole 12, and the second stopper 32 is formed with a second shaft hole 32a, and the two ends of the hinge shaft 31a of the swing member 31 are respectively rotatably connected to the first shaft hole 12 and the second shaft hole 32a; the second stopper 32 and the conveying bracket 1 are fixedly connected by bolts.

[0056] Obviously, it is also possible to uniformly set the first axial hole 12 and the second axial hole 32 a on the conveying bracket 1 or the second limiting member 32 .

[0057] In this embodiment, the swing member 31 can be arranged inside the conveying channel 100, but this will occupy the space inside the conveying channel 100. To avoid this situation, a through slot 200 connected to the conveying channel 100 is also provided on the conveying bracket 1. The through slot 200 is completely (such as Figure 4 As shown) or partially penetrates the conveying bracket 1, on the one hand, the free end of the swing member 31 can extend into the conveying channel 100 through the through groove 200; on the other hand, the swing member 31 in the receiving position can be fully or partially included in the through groove 200 to avoid occupying the internal space of the conveying channel 100.

[0058] In this embodiment, the side of the swing member 31 facing the conveying channel 100 may be a flat surface or a flat surface. Figure 3 and Figure 6 The inner concave surface 31b shown can make the mahjong tiles contact the far end of the swing member 31 as much as possible, so that the contact time between the mahjong tiles and the swing member 31 is short, the mahjong tiles can pass quickly, and the efficiency of picking up the tiles will not be affected.

[0059] The working principle of the conveying assembly of this embodiment is:

[0060] Initially, the swing member 31 droops due to gravity, with the fixed end mounted on the first stopper 11, and the free end extending through the through slot 200 to the starting end of the conveying channel 100 and located above the card suction wheel 2; when the mahjong tiles picked up from the shuffling plate by the card suction wheel 2 reach the starting end of the conveying channel 100, the mahjong tiles adsorbed on the card suction wheel 2 push the swing member 31 in the process of moving forward, so that the swing member 31 swings upward (at this time, the swing member 31 is in the receiving position); the larger the size of the mahjong tiles, the larger the swing amplitude of the swing member 31 upward, but the maximum swing amplitude of the swing member 31 upward is limited by the second stopper 32;

[0061] After the mahjong tiles pass through the swing member 31 and enter the conveying passage 100, the swing member 31 swings downward again until it is placed on the first limit member 11 (at this time, the swing member 31 is in the blocking position);

[0062] Repeat the above steps until the last hidden card passes through the swing member 31 and enters the conveying channel 100. At this time, the swing member 31 also returns to the blocking position from the receiving position, forming a physical partition between the hidden card and the card suction wheel 2, and the hidden card will not be repeatedly "attracted and released" by the card suction wheel 2.

[0063] Example 2

[0064] The present embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the first embodiment, except that: the first limit member 11 is not provided, but the length of the swing member 31 is longer. When the swing member 31 is in the blocking position, the swing member 31 will interfere with the surface of the card suction wheel 2 and cannot swing toward the card suction wheel 2, thereby achieving the purpose of blocking the hidden cards in the conveying channel 100.

[0065] Example 3

[0066] The present embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the first embodiment, except that: no second limiter 32 is provided, but at the free end or vertex 31c of the swinging member 31 (such as Figure 6 As shown in the figure, a second permanent magnet is arranged, and a second electromagnetic component is arranged on the conveying bracket 1. The second electromagnetic component is connected to the power supply, and the second electromagnetic component and the power supply are both connected to the control module.

[0067] Before the first mahjong tile enters the conveying channel 100, the swing member 31 hangs freely due to gravity, and the second electromagnetic component is not powered at this time; when the first mahjong tile enters, the swing member 31 is pushed forward, and at the same time, the control module enables the power supply to supply power to the second electromagnetic component, so that the second permanent magnet at the free end of the swing member 31 will be attracted by the second electromagnetic component in the powered state, and the swing member 31 will be fixed in the receiving position; after the last hidden card enters the conveying channel 100, the control module de-energizes the second electromagnetic component, and the second electromagnetic component cannot attract the second permanent magnet, and the swing member 31 hangs down again due to gravity and switches to the blocking position.

[0068] Example 4

[0069] The present embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the first embodiment, except that an elastic structure is provided between the swinging member 31 and the conveying bracket 1 to enable the swinging member 31 to have a swinging tendency toward the blocking position, and the elastic structure is a torsion spring sleeved on the hinge shaft 31a.

[0070] Therefore, when the mahjong tiles push the swinging member 31, the reaction force applied to the swinging member 31 must not only overcome the gravity of the swinging member 31, but also overcome the swinging tendency given by the torsion spring.

[0071] Example 5

[0072] The present embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the fourth embodiment, except that the noise reduction structure 3 is located on the side of the card suction wheel 2, rather than on the top.

[0073] Example 6

[0074] The present embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the embodiment 1, except that: the swinging member 31 is located on the side of the card suction wheel 2, and the fixed end of the swinging member 31 is provided with a first permanent magnet, and the conveying bracket 1 is provided with a first electromagnetic assembly, and the first electromagnetic assembly is connected to the power supply, and the first electromagnetic assembly and the power supply are both connected to the control module.

[0075] When the first electromagnetic component is powered off, it will not attract the first permanent magnet. At this time, the swing member 31 is only hinged to the conveying bracket 1, so the swing member 31 always remains in the receiving position during this process; until the last hidden card enters the conveying channel 100, the first electromagnetic component will be powered on and attract the first permanent magnet on the swing member 31, so that the swing member 31 switches from the receiving position to the blocking position.

[0076] Example 7

[0077] This embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the embodiment 1, except that the form of the noise reduction structure 3 is different.

[0078] In this embodiment, the noise reduction structure 3 can be arranged above the card suction wheel 2 or on the side of the card suction wheel 2; the noise reduction structure 3 includes at least one elastic damping member, which is made of a soft elastic material or has at least one elastic deformation part made of a soft elastic material.

[0079] The mahjong tiles enter the conveying passage 100 by applying a reaction force to the elastic damping member to cause the elastic damping member or the elastic deformation portion to undergo elastic deformation.

[0080] Example 8

[0081] This embodiment is a conveying assembly of a low-noise mahjong machine, and its structure is basically the same as that of the embodiment 1, except that the form of the noise reduction structure 3 is different.

[0082] In this embodiment, a roller is rotatably connected to the conveying bracket 1, and a conveyor belt is wound between the roller and the card suction wheel 2, and the conveying channel 100 is formed above the conveyor belt. The noise reduction structure 3 includes a third electromagnetic component arranged below the conveyor belt, the third electromagnetic component in the receiving position is not energized to allow mahjong tiles to pass freely, and the third electromagnetic component in the blocking position is energized to absorb mahjong tiles to prevent the mahjong tiles from being attracted by the card suction wheel 2.

[0083] It can be seen that the noise reduction structure 3 in this embodiment is more suitable for a mahjong machine that uses a conveyor belt to transport mahjong tiles.

[0084] Example 9

[0085] The present embodiment provides a low-noise mahjong machine, including a conveying assembly, which is the same as any of the conveying assemblies in embodiments 1-8.

Claims

1. A conveying assembly of a low-noise mahjong machine, comprising a conveying bracket (1), wherein a conveying channel (100) is formed in the conveying bracket (1), characterized in that: The conveying support (1) is provided with a noise reduction structure (3) at the starting end of the conveying channel (100), and the noise reduction structure (3) has an intake position for facilitating the entry of mahjong tiles into the conveying channel (100) and a blocking position for preventing the mahjong tiles that have entered the conveying channel (100) from retreating.

2. The conveying assembly according to claim 1, characterized in that The conveying bracket (1) is rotatably connected to a card suction wheel (2) located at the starting end of the conveying channel (100), and the noise reduction structure (3) is arranged above or to the side of the card suction wheel (2) or below the conveying channel (100).

3. The conveying assembly according to claim 2, characterized in that The noise reduction structure (3) comprises at least one swinging member (31), the swinging member (31) being movably connected to the conveying support (1) via a hinge shaft (31a) in a manner with a limited swing amplitude; the free end of the swinging member (31) extends into the conveying channel (100).

4. The conveying assembly according to claim 3, characterized in that A swing limiting member is provided between the swing member (31) and the conveying support (1) for preventing or limiting the swing member (31) from swinging toward the starting end of the conveying channel (100); The swing limiting member comprises a one-way bearing arranged on the hinge shaft (31a), or a first limiting member arranged on the swing path of the swing member (31); Alternatively, the free end of the swinging member (31) cannot continue to swing toward the starting end of the conveying channel (100) due to interference with the inner peripheral wall of the conveying channel (100).

5. The conveying assembly according to claim 3, characterized in that: The swinging member (31) is arranged above the card suction wheel (2), and the swinging member (31) returns to the blocking position by gravity after the mahjong tiles pass through.

6. The conveying assembly according to claim 3, characterized in that The swinging member (31) is arranged above or to the side of the card suction wheel (2), and an elastic structure is arranged between the swinging member (31) and the conveying bracket (1) so that the swinging member (31) has a swinging tendency toward the blocking position; the mahjong tiles enter the conveying channel (100) due to the reaction force exerted on the swinging member (31) to overcome its swinging tendency.

7. The conveying assembly according to claim 3, characterized in that A first permanent magnet is provided at the fixed end of the swinging member (31), and a first electromagnetic component is provided on the conveying bracket (1); The swinging member (31) is arranged above or on the side of the card suction wheel (2), and the first electromagnetic component has a power-off state that puts the swinging member (31) in the receiving position, and a power-on state that attracts the first permanent magnet to put the swinging member (31) in the blocking position; Alternatively, a second permanent magnet is provided at the free end or vertex of the swinging member (31), and a second electromagnetic component is provided on the conveying bracket (1); The swing member (31) is arranged above the card suction wheel (2), and the second electromagnetic component has the function of attracting the second permanent magnet to put the swing member (31) in a power-on state in the receiving position, and releasing the first permanent magnet to put the swing member (31) in a power-off state in the blocking position.

8. The conveying assembly according to any one of claims 3 to 7, characterized in that: The swinging member (31) is concave on one side facing the conveying passage (100) so that the mahjong tiles can contact the far end of the swinging member (31) as much as possible; The conveying bracket (1) is formed with a through groove (200) connected to the conveying channel (100), and the through groove (200) completely or partially penetrates the conveying bracket (1); The swinging member (31) in the receiving position is partially or completely received in the through slot (200), or passes through the through slot (200) in whole or in part; The conveying support (1) is also provided with a second limiting member (32) for limiting the swing end point of the swing member (31) in the receiving position.

9. The conveying assembly according to claim 2, characterized in that: The noise reduction structure (3) comprises at least one elastic damping member, which is made of a soft elastic material or has at least one elastic deformation portion made of a soft elastic material; The mahjong tiles are put into the conveying channel (100) by applying a reaction force to the elastic damping element so that the elastic damping element or the elastic deformation part undergoes elastic deformation.

10. The conveying assembly according to claim 2, characterized in that The conveying bracket (1) is rotatably connected to a roller, a conveying belt is wound between the roller and the card suction wheel (2), and the conveying channel (100) is formed above the conveying belt; The noise reduction structure (3) comprises a third electromagnetic component arranged below the conveyor belt. The third electromagnetic component in the receiving position is not energized to allow mahjong tiles to pass freely, and the third electromagnetic component in the blocking position is energized to absorb the mahjong tiles, thereby preventing the mahjong tiles from being attracted by the card suction wheel (2).

11. A low-noise mahjong machine, characterized in that: Comprising a conveying assembly as described in any one of claims 1-10.

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