Power driving mechanism for mahjong tile feeding of mahjong tile sucking wheel

Abstract

The invention belongs to the technical field of mahjong machines, and relates to a power driving mechanism for tile feeding of a tile suction wheel. The mahjong tile feeding device comprises at least one large disc fixing frame plate, a connecting support and a conveying support, and a mahjong tile feeding channel is formed between the connecting support and the conveying support. In the using process, a motor set generates main power, a large disc gear is rotated, an outer ring gear on the large disc gear drives a turning meshing transmission assembly to be transmitted to a tile sucking and feeding structure, tile feeding power of a tile sucking wheel is formed, the tile recording optical eye counts, the number of fed tiles meets the requirement, then the power is transmitted to an automatic tile blocking structure, the automatic tile blocking structure is opened downwards, and the automatic tile feeding device is started. According to the device, a four-direction conveying motor is removed, a linkage net for conveying from a large disc to four directions is formed, the failure rate generated by the motor is reduced, the maintenance cost is saved, and the service life of the whole machine is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of mahjong machines and relates to a power driving mechanism for a card-sucking wheel to load cards. Background Art

[0002] The mahjong machine in the prior art uses a card suction wheel to take the mahjong tiles out of the shuffle bucket, and then transfers the mahjong tiles in the length direction. The mahjong machine needs to be equipped with four card suction wheels, and the card suction wheel drive is generally driven by an independent motor to transmit power, so four motors need to be configured inside. On the one hand, it takes up a large internal space, and on the other hand, the failure rate caused by the motor is high, the maintenance cost is high, and the service life of the whole machine is relatively general. Therefore, it is urgent to design a power drive mechanism for the card suction wheel to load the tiles that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a swinging magnet card suction wheel mechanism for a mahjong machine [application number: 202011064822.8], which includes a conveying bracket and a conveyor belt. The back of the conveying bracket is fixedly connected to a servo motor, and the output end of the servo motor is fixedly connected to an output shaft through a coupling. The present invention relates to the technical field of mahjong machines. The swinging magnet card suction wheel mechanism of the mahjong machine is provided by arranging an I-shaped plate inside the storage plate, and an annular magnet is arranged on the inner surface of the I-shaped plate. When the I-shaped plate swings on the outer surface of the rotating shaft under the action of the counterweight block, the annular magnet can still suck up the mahjong tiles, and after the mahjong tiles are sucked up, the annular magnet moves with the conveyor belt. At the same time, a threaded hole is opened in the mounting plate, and the rotating bolts and the inclined plate are cooperated to make the mahjong tiles in a horizontal state when they are transported to the bottom of the I-shaped plate. Summary of the invention

[0004] The object of the present invention is to provide a power drive mechanism for loading cards onto a card suction wheel in view of the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A power drive mechanism for loading cards with a card suction wheel comprises at least one large plate fixing frame, a connecting frame and a conveying frame, a card loading channel is formed between the connecting frame and the conveying frame, a card suction loading structure for conveying mahjong cards one by one into the card loading channel is arranged between the connecting frame and the conveying frame, a rotatable large plate gear is arranged in the large plate fixing frame, a reversing meshing transmission assembly for driving the card suction loading structure to operate is arranged between the large plate gear and the card loading structure, a motor group for driving the large plate gear to rotate circumferentially is arranged at the bottom of the large plate gear, a card recording light eye and an automatic card blocking structure that can rotate along one end close to or away from the card suction loading structure are arranged above the card inlet of the card loading channel.

[0007] In the above-mentioned power drive mechanism for loading cards with a card suction wheel, the card suction and loading structure includes a card suction wheel and a conveyor belt connecting roller arranged between a connecting bracket and a conveying bracket, a conveyor belt for conveying mahjong cards one by one into a card loading channel is wound between the card suction wheel and the conveyor belt connecting roller, and a coaxial spur gear integrally formed with the card suction wheel is provided at the end of the card suction wheel, and the large plate gear and the coaxial spur gear are respectively meshed with the reversing meshing transmission assembly.

[0008] In the above-mentioned power drive mechanism for putting cards on the card suction wheel, the change-direction meshing transmission assembly includes a first spur gear, a second spur gear and a transmission spur gear arranged between the large disk gear and the coaxial spur gear, the first spur gear includes a first spur tooth portion and a first helical tooth portion, the second spur gear includes a second spur tooth portion and a second helical tooth portion, the first spur tooth portion is meshed with the large disk gear, the first helical tooth portion is meshed with the second helical tooth portion, the coaxial spur gear and the second spur tooth portion are respectively meshed with the transmission spur gear.

[0009] In the above-mentioned power drive mechanism for card-suction wheel loading cards, a gear set mounting seat is installed on the side of the connecting bracket, and the first straight bevel gear, the second straight bevel gear and the transmission spur gear are respectively installed in the gear set mounting seat.

[0010] In the above-mentioned power drive mechanism for card-loading by the card-sucking wheel, a downwardly recessed gap is provided in the large plate fixing frame plate, and the gear set mounting seat is arranged opposite to the gap.

[0011] In the above-mentioned power drive mechanism for card suction wheel, the motor group includes a large disc motor arranged at the bottom of the large disc fixing frame plate, a driving spur gear is fixed on the rotating shaft of the large disc motor, the large disc gear has an inner gear ring, and the driving spur gear is meshed with the inner gear ring.

[0012] In the above-mentioned power drive mechanism for loading cards on the card suction wheel, a positioning shaft hole is provided through the center of the large plate gear.

[0013] In the above-mentioned power drive mechanism for putting cards on the card suction wheel, a conveyor belt tensioning roller is also provided between the connecting bracket and the conveying bracket, and the conveyor belt tensioning roller rotates in cooperation with the conveyor belt. A plurality of iron sheet embedding grooves for installing magnetic magnets are provided in the card suction wheel.

[0014] In the above-mentioned power drive mechanism for loading cards on the card suction wheel, the card recording photoeye is installed on the connecting bracket and is staggered with the automatic card blocking structure.

[0015] In the above-mentioned power drive mechanism for loading cards on the card suction wheel, the automatic card blocking structure includes a card blocking piece arranged on the conveying bracket and a driver for driving the card blocking piece to move, and the card blocking piece is located directly above the card suction wheel.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. During the use of the present invention, the motor group generates the main power to rotate the large plate gear, and the outer ring gear on the large plate gear drives the reversing meshing transmission component to transmit it to the card suction and loading structure, forming the card suction wheel loading power, which is counted by the card counting photoeye. After the number of loaded cards reaches the requirement, it is transmitted to the automatic card blocking structure, and the automatic card blocking structure is opened downward to prevent the mahjong cards from continuing to enter the conveyor. This device removes the four-way conveying motor and forms a linkage network from the large plate to the four-way conveyor, which reduces the failure rate caused by the motor, saves maintenance costs, and increases the service life of the whole machine.

[0018] 2. During use of the present invention, the large disc motor is started, and the active spur gear is driven to rotate through the large disc motor. The active spur gear is meshed with the inner gear ring to drive the large disc gear to rotate. The first spur gear portion and the first helical gear portion are driven to rotate through the outer gear ring of the large disc gear. The first helical gear portion is meshed with the second helical gear portion to synchronously drive the second spur gear portion to rotate. The coaxial spur gear and the second spur gear portion are respectively meshed with the transmission spur gear to drive the card suction wheel to rotate, thereby realizing the change-of-direction transmission. A one-to-many structure is adopted, and one large disc can drive multiple card suction wheels to rotate synchronously to load cards.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a partial structural schematic diagram of the present invention.

[0022] Figure 3 It is a partial structural schematic diagram of another aspect of the present invention.

[0023] Figure 4 It is a partial structural schematic diagram of another aspect of the present invention.

[0024] In the figure: a large plate fixing frame 1, a gap 1a, a connecting bracket 2, a conveying bracket 3, a card loading channel 4, a card suction and loading structure 5, a card suction wheel 5a, a coaxial spur gear 5a1, an iron sheet groove 5a2, a conveyor belt connecting roller 5b, a conveyor belt 5c, a conveyor belt tensioning roller 5d, a large plate gear 6, an inner gear ring 6a, a positioning shaft hole 6b, a reversing meshing transmission assembly 7, a first straight bevel gear 7a, a first straight tooth portion 7a1, a first bevel tooth portion 7a2, a second straight bevel gear 7b, a second straight tooth portion 7b1, a second bevel tooth portion 7b2, a transmission spur gear 7c, a motor group 8, a large plate motor 8a, an active spur gear 8b, a card recording light eye 9, an automatic card blocking structure 10, a card blocking piece 10a, a driver 10b, and a gear group mounting seat 11. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-4 As shown, a power drive mechanism for loading cards with a card suction wheel comprises at least one large plate fixing frame plate 1, a connecting frame 2 and a conveying frame 3, a card loading channel 4 is formed between the connecting frame 2 and the conveying frame 3, a card suction loading structure 5 for conveying mahjong cards one by one into the card loading channel 4 is installed between the connecting frame 2 and the conveying frame 3, a rotatable large plate gear 6 is provided in the large plate fixing frame plate 1, a reversing meshing transmission component 7 for driving the card suction loading structure 5 to operate is provided between the large plate gear 6 and the card loading structure 5, a motor group 8 for driving the large plate gear 6 to rotate circumferentially is provided at the bottom of the large plate gear 6, a card recording light eye 9 and an automatic card blocking structure 10 which can rotate along one end close to or away from the card suction loading structure 5 are provided above the card inlet of the card loading channel 4.

[0027] In this embodiment, during use, the main power is generated by the motor group 8 to rotate the large plate gear 6, and the outer ring gear on the large plate gear 6 or the other teeth meshing with the reversing meshing transmission component 7 drives the reversing meshing transmission component 7 to transmit to the card suction and card loading structure 5, forming a card suction wheel card loading power, which is counted by the card counting photoeye 9. After the number of cards loaded reaches the requirement, it is transmitted to the automatic card blocking structure 10, and the automatic card blocking structure 10 is opened downward to prevent the mahjong cards from continuing to enter the conveyor. This device eliminates the four-way conveying motor and forms a linkage network from the large plate to the four-way conveyor, which reduces the failure rate caused by the motor, saves maintenance costs, and increases the service life of the whole machine.

[0028] Combination Figure 1-4As shown, the card-absorbing and loading structure 5 includes a card-absorbing wheel 5a and a conveyor belt connecting roller 5b arranged between the connecting bracket 2 and the conveying bracket 3, a conveyor belt 5c for transporting mahjong cards one by one to the loading channel 4 is wound between the card-absorbing wheel 5a and the conveyor belt connecting roller 5b, a coaxial spur gear 5a1 integrally formed with the card-absorbing wheel 5a is provided at the end of the card-absorbing wheel 5a, the large plate gear 6 and the coaxial spur gear 5a1 are respectively meshed with the reversing meshing transmission assembly 7, a conveyor belt tensioning roller 5d is also provided between the connecting bracket 2 and the conveying bracket 3, the conveyor belt tensioning roller 5d is rotatably matched with the conveyor belt 5c, and a plurality of iron sheet embedding grooves 5a2 for installing magnetic magnet sheets are opened in the card-absorbing wheel 5a.

[0029] Specifically, during the card-loading process, the iron sheet groove 5a2 in the card-absorbing wheel 5a is equipped with a magnetic sheet, and the card-absorbing wheel 5a transmits the rotation of the large plate gear 6 through the meshing cooperation between the coaxial spur gear 5a1 and the reversing meshing transmission assembly 7. During the rotation of the card-absorbing wheel 5a, the mahjong cards are adsorbed one by one onto the conveyor belt 5c through the magnetic sheet, and the mahjong cards are transported to the card-loading channel 4 through the conveyor belt 5c. The conveyor belt tensioning roller 5d can ensure that the conveyor belt 5c is always in a taut state during operation.

[0030] Combination Figure 1 , Figure 4 As shown, the direction-changing meshing transmission assembly 7 includes a first straight bevel gear 7a, a second straight bevel gear 7b and a transmission spur gear 7c which are arranged between the large disc gear 6 and the coaxial spur gear 5a1. The first straight bevel gear 7a includes a first straight tooth portion 7a1 and a first helical tooth portion 7a2. The second straight bevel gear 7b includes a second straight tooth portion 7b1 and a second helical tooth portion 7b2. The first straight tooth portion 7a1 is meshed with the large disc gear 6, the first helical tooth portion 7a2 is meshed with the second helical tooth portion 7b2, the coaxial spur gear 5a1 and the second straight tooth portion 7b1 are respectively meshed with the transmission spur gear 7c. The motor group 8 includes a large disc motor 8a arranged at the bottom of the large disc fixing frame plate 1. A driving spur gear 8b is fixed on the rotating shaft of the large disc motor 8a. The large disc gear 6 has an inner gear ring 6a, and the driving spur gear 8b is meshed with the inner gear ring 6a.

[0031] In this embodiment, during use, the large disk motor 8a is started, and the large disk motor 8a drives the active spur gear 8b to rotate, and the active spur gear 8b meshes with the inner gear ring 6a to drive the large disk gear 6 to rotate, and the outer gear ring of the large disk gear 6 drives the first straight tooth portion 7a1 and the first helical tooth portion 7a2 to rotate, and the first helical tooth portion 7a2 meshes with the second helical tooth portion 7b2 to synchronously drive the second straight tooth portion 7b1 to rotate, and the coaxial spur gear 5a1 and the second spur tooth portion 7b1 respectively mesh with the transmission spur gear 7c to drive the card suction wheel 5a to rotate, thereby realizing the variable direction transmission, and adopting a one-to-many structure, one large disk can drive multiple card suction wheels 5a to rotate synchronously to load cards;

[0032] The upper ring of the large disk gear 6 can be in the shape of an end face gear, and the direction-changing meshing transmission assembly 7 can be a single transmission spur gear meshing with the end face gear of the outer ring of the disk gear 6. The transmission spur gear acts as an intermediate transmission to transmit the force from the large disk gear 6 to the coaxial spur gear 5a1 to drive the card suction wheel 5a.

[0033] A spur bevel gear transmission structure, a curved bevel gear transmission structure, a helical bevel gear transmission structure or a hypoid bevel gear transmission structure can be used between the large plate gear 6 and the direction-changing meshing transmission assembly 7, wherein one end of the direction-changing meshing transmission assembly 7 meshes with the large plate gear 6, and the other end meshes with the coaxial spur gear 5a1 to achieve direction-changing transmission.

[0034] A gear set mounting seat 11 is installed on the side of the connecting bracket 2, and the first straight bevel gear 7a, the second straight bevel gear 7b and the transmission spur gear 7c are respectively installed in the gear set mounting seat 11.

[0035] In this embodiment, the gear set mounting seat 11 is used to mount and fix the first spur gear 7a, the second spur gear 7b and the transmission spur gear 7c. The first spur gear 7a, the second spur gear 7b and the transmission spur gear 7c are connected to the gear set mounting seat 11 through a rotating shaft.

[0036] Combination Figure 1 As shown, the large disk fixing frame plate 1 has a downwardly recessed clearance gap 1a, and the gear set mounting seat 11 is arranged opposite to the clearance gap 1a.

[0037] In this embodiment, the clearance gap 1a can better install the gear set mounting seat 11, and the space is reasonably compact.

[0038] A positioning shaft hole 6b is formed through the center of the large disc gear 6 .

[0039] In this embodiment, a positioning shaft is inserted into the positioning shaft hole 6b to prevent the large plate gear 6 from being offset during the rotation process.

[0040] Combination Figure 1 , Figure 3 As shown, the card-recording photoeye 9 is mounted on the connecting bracket 2 and is staggered with the automatic card-blocking structure 10 .

[0041] In this embodiment, the card counting photoeye 9 is used to count mahjong tiles. Those skilled in the art should understand that the card counting photoeye 9 is a prior art, and its internal structure and working principle are not the focus of this patent, so they will not be described in detail.

[0042] Combination Figure 3 As shown, the automatic card blocking structure 10 includes a card blocking piece 10a disposed on the conveying bracket 3 and a driver 10b for driving the card blocking piece 10a to move. The card blocking piece 10a is located directly above the card suction wheel 5a.

[0043] In this embodiment, a signal receiver is installed in the driver 10b. When the card counting photoeye 9 reaches the number of cards, the card counting photoeye 9 transmits a signal to the driver 10b, which drives the card blocking piece 10a to open downward to prevent the mahjong tiles from continuing to enter and be transported.

[0044] The working principle of the present invention is:

[0045] During use, the large disk motor 8a is started, and the large disk motor 8a drives the active spur gear 8b to rotate. The active spur gear 8b meshes with the inner gear ring 6a to drive the large disk gear 6 to rotate. The outer gear ring of the large disk gear 6 drives the first straight tooth portion 7a1 and the first bevel tooth portion 7a2 to rotate. The first bevel tooth portion 7a2 meshes with the second bevel tooth portion 7b2 to synchronously drive the second straight tooth portion 7b1 to rotate. The coaxial spur gear 5a1 and the second spur tooth portion 7b1 mesh with the transmission spur gear 7c respectively to drive the card suction wheel 5a to rotate, forming a card-loading power for the card suction wheel, which is counted by the card-recording photoeye 9. When the card-recording photoeye 9 counts and reaches the number of cards loaded, the card-recording photoeye 9 transmits a signal to the driver 10b, which drives the card baffle 10a to open downward through the driver 10b to prevent the mahjong cards from continuing to enter the conveyor. The device removes the four-way conveying motor and forms a linkage network from the large disk to the four directions, thereby reducing the failure rate caused by the motor, saving maintenance costs, and increasing the service life of the whole machine.

[0046] During the card loading process, the iron sheet embedding groove 5a2 in the card suction wheel 5a is equipped with a magnet sheet, and the card suction wheel 5a transmits the rotation of the large plate gear 6 through the meshing cooperation between the coaxial spur gear 5a1 and the reversing meshing transmission component 7. During the rotation of the card suction wheel 5a, the mahjong cards are adsorbed one by one onto the conveyor belt 5c through the magnet sheet, and the mahjong cards are transported to the card loading channel 4 through the conveyor belt 5c. The conveyor belt tensioning roller 5d can ensure that the conveyor belt 5c is always in a tight state during the operation.

[0047] The gear set mounting seat 11 is used to install and fix the first straight bevel gear 7a, the second straight bevel gear 7b and the transmission spur gear 7c. The first straight bevel gear 7a, the second straight bevel gear 7b and the transmission spur gear 7c are connected to the gear set mounting seat 11 through a rotating shaft. The gap 1a can better install the gear set mounting seat 11. The space is reasonable and compact. A positioning shaft is inserted in the positioning shaft hole 6b to prevent the large plate gear 6 from deviating during rotation. The card counting light eye 9 is used to count mahjong cards.

[0048] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0049] Although this article frequently uses terms such as large plate fixing frame 1, clearance gap 1a, connecting bracket 2, conveying bracket 3, card loading channel 4, card suction and loading structure 5, card suction wheel 5a, coaxial spur gear 5a1, iron sheet groove 5a2, conveyor belt connecting roller 5b, conveyor belt 5c, conveyor belt tensioning roller 5d, large plate gear 6, inner gear ring 6a, positioning shaft hole 6b, change-of-direction meshing transmission assembly 7, first straight bevel gear 7a, first straight tooth portion 7a1, first bevel tooth portion 7a2, second straight bevel gear 7b, second straight tooth portion 7b1, second bevel tooth portion 7b2, transmission spur gear 7c, motor group 8, large plate motor 8a, active spur gear 8b, card recording light eye 9, automatic card blocking structure 10, card blocking plate 10a, driver 10b, gear group mounting seat 11, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention. Any additional limitations interpreted as such are contrary to the spirit of the present invention.

Claims

1. A power drive mechanism for card-sucking wheel, comprising at least one large plate fixing frame (1), a connecting bracket (2) and a conveying bracket (3), characterized in that: A card loading channel (4) is formed between the connecting bracket (2) and the conveying bracket (3); a card suction and loading structure (5) for conveying mahjong tiles one by one into the card loading channel (4) is arranged between the connecting bracket (2) and the conveying bracket (3); a rotatable large plate gear (6) is arranged in the large plate fixing frame (1); a reversing meshing transmission assembly (7) for driving the card suction and loading structure (5) to operate is arranged between the large plate gear (6) and the card suction and loading structure (5); a motor group (8) for driving the large plate gear (6) to rotate in a circumferential direction is arranged at the bottom of the large plate gear (6); a card recording light eye (9) and an automatic card blocking structure (10) that can rotate along one end close to or away from the card suction and loading structure (5) are arranged above the card inlet of the card loading channel (4).

2. The power drive mechanism for the card suction wheel to load cards according to claim 1, characterized in that: The card-sucking and loading structure (5) comprises a card-sucking wheel (5a) and a conveyor belt connecting roller (5b) arranged between a connecting bracket (2) and a conveyor belt connecting roller (5b); a conveyor belt (5c) for conveying mahjong cards one by one into a loading channel (4) is arranged between the card-sucking wheel (5a) and the conveyor belt connecting roller (5b); a coaxial spur gear (5a1) integrally formed with the card-sucking wheel (5a) is arranged at the end of the card-sucking wheel (5a); and the large plate gear (6) and the coaxial spur gear (5a1) are respectively meshed with a direction-changing meshing transmission assembly (7).

3. The power drive mechanism for the card suction wheel to load cards according to claim 2, characterized in that: The direction-changing meshing transmission assembly (7) comprises a first straight bevel gear (7a), a second straight bevel gear (7b) and a transmission spur gear (7c) which are arranged between a large plate gear (6) and a coaxial spur gear (5a1); the first straight bevel gear (7a) comprises a first straight tooth portion (7a1) and a first helical tooth portion (7a2); the second straight bevel gear (7b) comprises a second straight tooth portion (7b1) and a second helical tooth portion (7b2); the first straight tooth portion (7a1) meshes with the large plate gear (6); the first helical tooth portion (7a2) meshes with the second helical tooth portion (7b2); the coaxial spur gear (5a1) and the second straight tooth portion (7b1) respectively mesh with the transmission spur gear (7c).

4. The power drive mechanism for the card suction wheel to load cards according to claim 3, characterized in that: A gear set mounting seat (11) is installed on the side of the connecting bracket (2), and the first straight bevel gear (7a), the second straight bevel gear (7b) and the transmission spur gear (7c) are respectively installed in the gear set mounting seat (11).

5. The power drive mechanism for card-suction wheel loading according to claim 4, characterized in that: The large disk fixing frame plate (1) has a downwardly recessed clearance notch (1a) therein, and the gear set mounting seat (11) is arranged opposite to the clearance notch (1a).

6. The power drive mechanism for loading cards on a card suction wheel according to any one of claims 3 to 5, characterized in that: The motor group (8) comprises a large disc motor (8a) arranged at the bottom of the large disc fixing frame plate (1), a driving spur gear (8b) is fixed on the rotating shaft of the large disc motor (8a), an inner gear ring (6a) is provided inside the large disc gear (6), and the driving spur gear (8b) is meshed with the inner gear ring (6a).

7. The power drive mechanism for loading cards on a card suction wheel according to claim 6, characterized in that: A positioning shaft hole (6b) is provided through the center of the large disk gear (6).

8. The power drive mechanism for loading cards on a card suction wheel according to any one of claims 2 to 4, characterized in that: A conveyor belt tensioning roller (5d) is also provided between the connecting bracket (2) and the conveying bracket (3), and the conveyor belt tensioning roller (5d) is rotationally matched with the conveyor belt (5c). A plurality of iron sheet embedding grooves (5a2) for installing magnetic magnet sheets are provided in the card suction wheel (5a).

9. The power drive mechanism for card-suction wheel loading according to claim 1, characterized in that: The card-recording photocell (9) is mounted on the connecting bracket (2) and is arranged in an alternating manner with the automatic card-blocking structure (10).

10. The power drive mechanism for the card suction wheel to load cards according to claim 2, characterized in that: The automatic card blocking structure (10) comprises a card blocking plate (10a) arranged on a conveying bracket (3) and a driver (10b) for driving the card blocking plate (10a) to move; the card blocking plate (10a) is located directly above the card suction wheel (5a).

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