Folding structure of mahjong machine

Abstract

The utility model relates to the field of mahjong machines, and discloses a folding structure of a mahjong machine, which comprises a table top frame (1) and a supporting column (2), the table top frame (1) is hinged on the supporting column (2), a swing plate (3) is fixed at the lower end of the table top frame (1), an arc-shaped rack (31) is arranged on the swing plate (3), a motor (4) is arranged on the supporting column (2), and a gear (5) is arranged on an output shaft of the motor (4). The gear (5) is meshed with the rack (31) and drives the table top frame (1) to be folded on the supporting column (2). According to the folding mechanism, the gear on the motor directly drives the swing plate to swing, the swing plate directly drives the table top frame to be folded, the number of parts is small, the connection relation is simple, the structure is compact, and therefore the folding structure is low in failure rate, good in stability and high in reliability. When the gear and the rack are not in transmission, that is, when the motor does not work, the gear and the rack are still tightly meshed together, the limiting effect is achieved, and the table top frame is not prone to shaking on the supporting columns.

Description

Technical Field

[0001] The utility model relates to the field of mahjong machines, in particular to a folding structure of a mahjong machine. Background Art

[0002] The foldable mahjong table can save space after being folded. When the mahjong machines leave the factory, freight trucks can transport more mahjong machines at a time. When the mahjong machines are placed at home, the folded mahjong machines take up less space.

[0003] The current automatic folding mahjong machine structures are relatively complex. For example, the publication number is CN113108198A, which includes: a column, a sliding connector, a pull rod and a guide rail. The guide rail is horizontally arranged on the column. The sliding connector slides freely in the horizontal direction under the constraint of the guide rail, and forms a retractable structure in the horizontal direction with the guide rail; one end of the sliding connector is hinged to the mahjong machine host, and the two ends of the pull rod are respectively hinged to the mahjong machine host and the guide rail, and the retractable structure, the bottom surface of the mahjong machine host and the pull rod are surrounded by a triangular structure with adjustable posture. It also includes an automatic push-pull unit, which includes an electric screw and a nut bracket. The nut of the electric screw is connected to the sliding connector through the nut bracket. The screw of the electric screw is rotatably supported horizontally on the column and parallel to the slide rail. The screw rotates to drive the nut to drive the sliding connector to slide along the slide rail, and the folding of the mahjong machine host is achieved by changing the triangular structure. This type of folding mahjong machine has many connections, which on the one hand is expensive, and on the other hand has a high failure rate and high maintenance cost. Utility Model Content

[0004] The utility model aims at the shortcomings of the prior art and provides a folding structure of a mahjong machine.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] The folding structure of the mahjong machine includes a desktop frame and a support column. The desktop frame is hinged on the support column. A swing plate is fixed at the lower end of the desktop frame. The swing plate is provided with an arc-shaped rack. A motor is installed on the support column. A gear is installed on the output shaft of the motor. The gear is meshed with the rack and drives the desktop frame to fold on the support column.

[0007] The traditional folding method generally drives the desktop frame to fold by driving the top rod to rise and fall through a motor, which has a complex connection relationship, multiple structures, high cost, and a high failure rate. The folding mechanism directly drives the swing plate to swing through the gear on the motor, and the swing plate directly drives the desktop frame to fold, which has fewer parts, simple connection relationship, and compact structure, so that the folding structure has a low failure rate, good stability, and high reliability.

[0008] Preferably, a first groove is provided on the inner wall of the swing plate, a rack is formed on the inner wall of the first groove, and the gear extends into the first groove and meshes with the rack. The rack is integrally formed on the swing plate, the two are highly secure, and the manufacturing cost is low. The rack is formed on the inner wall of the first groove, and when the gear meshes with the rack, the swing plate can be tightly close to the support column, so that the gap between the two is very small and the structure is compact.

[0009] Preferably, a limit switch for controlling the swinging of the swing plate is fixed on the side wall of the support column, and when the swing plate triggers the limit switch, the motor stops starting. The limit switch can make the desktop frame fold to a specified position to prevent the desktop frame from folding excessively.

[0010] Preferably, a second groove is provided on the swing plate, and the limit switch extends into the second groove. When the swing plate swings, the inner wall of the second groove triggers the switch of the limit switch. The swing plate covers the limit switch through the second groove, so that the structure between the swing plate and the support column is more compact, and there is no large gap between the two. The limit switch is hidden in the swing plate, which can better protect the limit switch.

[0011] Preferably, there are two limit switches, one of which is arranged horizontally on the side wall of the support column, with the switch thereon facing upward; the other limit switch is arranged vertically on the side wall of the support column, with the switch thereon facing the side. This ensures the horizontality of the desktop frame when it is laid flat and the inclination when it is folded, and prevents the desktop frame from folding excessively.

[0012] Preferably, the support column includes a support column and a bracket, the bracket is fixed to the upper end of the support column, the bracket is in the shape of a U-shaped bracket, a third groove is provided on the bracket, and the motor is installed in the third groove. The bracket is used to support the desktop frame on one side and to install the motor on the other side.

[0013] Preferably, the desktop frame includes a bottom plate and a chassis shell, the chassis shell is fixed on the lower end surface of the bottom plate, a stepped cover plate is installed on the bracket, the cover plate is installed in the third groove and covers the motor, the lower step surface of the cover plate and the side wall of the bracket form a mounting groove, and when the desktop frame is folded, the chassis shell extends into the mounting groove. The cover plate is used to protect the motor and its internal wiring harness. The chassis shell extends into the mounting groove, so that the center of gravity of the desktop frame is close to the support column, ensuring that the desktop frame will not easily tip over after being folded, thereby improving the stability of the mahjong machine after folding.

[0014] Preferably, a limiting member is fixed on the desktop frame, and a limiting hole is provided at the upper end of the support column. When the desktop frame is laid flat, the limiting member is connected to the limiting hole. The limiting member is used to limit the desktop frame on the support column, further improving the stability of the desktop frame when laid flat, and preventing the desktop frame from being folded due to artificial lifting.

[0015] Preferably, a fixing plate extending downward is fixed at the lower end of the desktop frame, a notch is provided on the side of the swing plate, and the limiter is installed on the fixing plate through the notch. The fixing plate provides a design space so that the limiter can be engaged with the support column.

[0016] Preferably, the limiting member includes a base, a pull head, a limiting shaft and a spring, wherein the base is fixed on the fixed plate, the limiting shaft is fixed on the pull head, the spring is sleeved on the limiting shaft, one end of the spring is fixed to the pull head, and the other end is fixed to the base, and the inner end of the limiting shaft extends out of the end surface of the fixed plate. The pull-out limiting member is convenient for people to quickly release the restriction between the desktop stand and the support column, and also convenient for people to quickly limit the desktop stand on the support column.

[0017] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0018] The traditional folding method generally drives the desktop frame to fold by driving the top rod to rise and fall through a motor, which has a complex connection relationship, multiple structures, high cost, and a high failure rate. The folding mechanism directly drives the swing plate to swing through the gear on the motor, and the swing plate directly drives the desktop frame to fold, which has fewer parts, simple connection relationship, and compact structure, so that the folding structure has a low failure rate, good stability, and high reliability.

[0019] When the gear and the rack are meshed for transmission, the swing plate can be driven to realize the swing of the desktop frame; when the gear and the rack are not transmitting, that is, when the motor is not working, the gear is still tightly meshed with the rack, which plays a limiting role, and the desktop frame will not easily shake on the support column. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model when it is not folded.

[0021] Figure 2 It is a schematic diagram of the structure of the utility model after folding.

[0022] Figure 3 It is a structural diagram of the adaptation of the motor and the swing plate.

[0023] Figure 4 yes Figure 2 The schematic diagram of the structure when the swing plate is not installed.

[0024] Figure 5 yes Figure 2 There is no structural diagram of the base plate installed.

[0025] Figure 6 yes Figure 5 This is a schematic diagram of the structure when the chassis shell is not installed.

[0026] Figure 7 yes Figure 6The schematic diagram of the structure when the cover is not installed.

[0027] Figure 8 It is a structural diagram of a limiter.

[0028] The parts indicated by the numbers in the above drawings are as follows:

[0029] 1-desktop frame, 11-bottom plate, 12-chassis shell

[0030] 2—support column, 21—pillar, 22—bracket, 221—third groove, 222—limiting hole

[0031] 3—swing plate, 31—rack, 32—first groove, 33—second groove, 34—notch

[0032] 4—Motor

[0033] 5—Gear

[0034] 6—Limit switch

[0035] 7—Cover

[0036] 8-limiting piece, 81-base, 82-pulling head, 83-limiting shaft

[0037] 9—Fixed plate DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 The utility model is further described in detail with examples.

[0039] Example 1

[0040] The folding structure of the mahjong machine includes a table frame 1 and a support column 2. The table frame 1 is hinged on the support column 2 through a pin shaft, and the table frame 1 can swing back and forth on the support column 2. A swing plate 3 is screwed to the lower end of the table frame 1, and the swing plate 3 can drive the table frame 1 to swing synchronously when swinging, so as to realize the folding of the table frame 1. The swing plate 3 is provided with an arc-shaped rack 31, and a motor 4 is installed on the support column 2. A gear 5 is installed on the output shaft of the motor 4, and the gear 5 meshes with the rack 31 and drives the table frame 1 to fold on the support column 2.

[0041] A first groove 32 is provided on the inner wall of the swing plate 3 . The first groove 32 is an arc-shaped groove. A rack 31 is formed on the lower inner wall of the first groove 32 , that is, the rack 31 and the swing plate 3 are integrally injection molded. The gear 5 extends into the first groove 32 and meshes with the rack 31 .

[0042] A limit switch 6 for controlling the swing of the swing plate 3 is fixed on the side wall of the support column 2. When the swing plate 3 triggers the limit switch 6, the motor 4 stops starting. When the swing plate 3 contacts the switch of the limit switch 6, the swing plate 3 stops folding, thereby ensuring the parallelism and inclination of the desktop frame 1. The desktop frame 1 can be as horizontal as possible when placed flat on the support column 2, and can be as vertical as possible when folded on the support column 2.

[0043] The swing plate 3 is provided with a second groove 33 , which is arranged above the first groove 32 , and the limit switch 6 extends into the second groove 33 . When the swing plate 3 swings, the inner wall of the second groove 33 triggers the switch of the limit switch 6 .

[0044] There are two limit switches 6, one of which is arranged transversely on the side wall of the support column 2, with the switch thereon facing upward; the other limit switch 6 is arranged longitudinally on the side wall of the support column 2, with the switch thereon facing the side.

[0045] When the desktop frame 1 is placed flat on the supporting column 2, the swing plate 3 triggers the horizontally arranged limit switch 6, the motor 4 stops running, and the swing plate 3 stops swinging; when the desktop frame 1 is folded, the swing plate 3 triggers the longitudinally arranged limit switch 6, the motor 4 stops running, and the swing plate 3 stops swinging, so that the desktop frame 1 is folded on the supporting column 2.

[0046] The support column 2 includes a pillar 21 and a bracket 22. The bracket 22 is welded to the upper end of the pillar 21. The bracket 22 is in the shape of a U-shaped bracket. A third groove 221 is provided on the bracket 22. The motor 4 is installed in the third groove 221 through a support. The output shaft of the motor 4 extends out of the side wall of the bracket 22 and is fixedly connected to the gear 5.

[0047] The desktop frame 1 includes a base plate 11 and a chassis shell 12, the chassis shell 12 is fastened to the lower end surface of the base plate 11 by screws, a stepped cover plate 7 is installed on the bracket 22, the cover plate 7 is installed in the third groove 221 and covers the motor 4, the lower step surface of the cover plate 7 and the side wall of the bracket 22 form a mounting groove 100, when the desktop frame 1 is folded, the chassis shell 12 extends into the mounting groove 100, the chassis shell 12 and the weight of the chassis shell 12 are heavy, when the center of gravity of the folded chassis shell 12 is close to the support column 2, the folded mahjong machine will not easily tip over, thereby ensuring the stability of the mahjong machine.

[0048] Example 2

[0049] The features of Example 2 are basically the same as those of Example 1, except that a limiting member 8 is fixed on the desktop frame 1, and the limiting member 8 is used to limit the desktop frame 1 on the support column 2. A limiting hole 222 is provided on the upper end of the support column 2. When the desktop frame 1 is laid flat, the limiting member 8 is connected to the limiting hole 222 to prevent the desktop frame 1 from being artificially folded when laid flat.

[0050] A downwardly extending fixing plate 9 is fixed to the lower end of the desktop frame 1 , and the fixing plate 9 is screwed to the bottom plate of the desktop frame 1 . A notch 34 is provided on the side of the swing plate 3 , and the limiting member 8 is installed on the fixing plate 9 through the notch 34 .

[0051] The limiting member 8 includes a base 81, a pull head 82, a limiting shaft 83 and a spring. The base 81 is fastened to the fixed plate 9 by screws, the limiting shaft 83 is fixed to the pull head 82, and the spring is sleeved on the limiting shaft 83. One end of the spring is fixed to the pull head 82, and the other end is fixed to the base 81. The inner end of the limiting shaft 83 extends out of the end surface of the fixed plate 9.

[0052] Example 3

[0053] The features of Example 3 are basically the same as those of Example 1 or 2, except that there are two swing plates 2, that is, swing plates 2 matching with the support column 2 are provided on both sides of the support column 2, and two motors 4 are also installed on the support column 2, each motor 4 drives a swing plate 2 to swing.

Claims

1. A folding structure of a mahjong machine, comprising a table frame (1) and a support column (2), wherein the table frame (1) is hinged on the support column (2), and is characterized in that: A swing plate (3) is fixed at the lower end of the desktop frame (1), and an arc-shaped rack (31) is provided on the swing plate (3). A motor (4) is installed on the support column (2), and a gear (5) is installed on the output shaft of the motor (4). The gear (5) meshes with the rack (31) and drives the desktop frame (1) to fold on the support column (2).

2. The folding structure of the mahjong machine according to claim 1, characterized in that: A first groove (32) is provided on the inner wall of the swing plate (3), a rack (31) is formed on the inner wall of the first groove (32), and the gear (5) extends into the first groove (32) and meshes with the rack (31).

3. The folding structure of the mahjong machine according to claim 1, characterized in that: A limit switch (6) for controlling the swing of the swing plate (3) is fixed on the side wall of the support column (2); when the swing plate (3) triggers the limit switch (6), the motor (4) stops starting.

4. The folding structure of the mahjong machine according to claim 3, characterized in that: A second groove (33) is provided on the swing plate (3), and the limit switch (6) extends into the second groove (33). When the swing plate (3) swings, the inner wall of the second groove (33) triggers the switch of the limit switch (6).

5. The folding structure of the mahjong machine according to claim 3, characterized in that: There are two limit switches (6), one of which is arranged transversely on the side wall of the support column (2), with the switch thereon facing upward; and the other limit switch (6) is arranged longitudinally on the side wall of the support column (2), with the switch thereon facing sideways.

6. The folding structure of the mahjong machine according to claim 1, characterized in that: The support column (2) comprises a support column (21) and a bracket (22), wherein the bracket (22) is fixed to the upper end of the support column (21), the bracket (22) is in the shape of a U-shaped bracket, a third groove (221) is provided on the bracket (22), and the motor (4) is installed in the third groove (221).

7. The folding structure of the mahjong machine according to claim 6, characterized in that: The desktop frame (1) comprises a bottom plate (11) and a chassis shell (12), wherein the chassis shell (12) is fixed on the lower end surface of the bottom plate (11), and a stepped cover plate (7) is installed on the bracket (22), the cover plate (7) is installed in a third groove (221) and covers the motor (4), and the lower step surface of the cover plate (7) and the side wall of the bracket (22) form a mounting groove (100), and when the desktop frame (1) is folded, the chassis shell (12) extends into the mounting groove (100).

8. The folding structure of the mahjong machine according to claim 1, characterized in that: A limiting member (8) is fixed on the desktop frame (1), and a limiting hole (222) is provided at the upper end of the support column (2). When the desktop frame (1) is laid flat, the limiting member (8) is connected to the limiting hole (222) in a limiting manner.

9. The folding structure of the mahjong machine according to claim 8, characterized in that: A downwardly extending fixing plate (9) is fixed to the lower end of the desktop frame (1), a notch (34) is provided on the side of the swing plate (3), and the limiting member (8) is installed on the fixing plate (9) through the notch (34).

10. The folding structure of the mahjong machine according to claim 9, characterized in that: The limiting member (8) comprises a base (81), a pull head (82), a limiting shaft (83) and a spring. The base (81) is fixed on the fixing plate (9), the limiting shaft (83) is fixed on the pull head (82), the spring is sleeved on the limiting shaft (83), one end of the spring is fixed to the pull head (82), and the other end is fixed to the base (81), and the inner end of the limiting shaft (83) extends out of the end surface of the fixing plate (9).

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