Automatic rotation adjustment structure of child seat and use method thereof

Abstract

The present invention discloses an automatic rotation adjustment structure for a child seat and a method for using the same, comprising a rotation drive mechanism for a seat rotating disk and a gear locking mechanism; the rotation drive mechanism for the seat rotating disk comprises a stepping motor A, an adapter, a rotating shaft connected to the seat rotating disk, and a rotating shaft bracket. The present invention is provided with a rotation drive mechanism and a gear locking mechanism for the seat rotating disk. The rotation drive mechanism cooperates with a positioning disk and a proximity switch A to control the seat rotating disk to rotate according to gear intervals. The gear locking mechanism cooperates with proximity switches B, C, and a positioning member to control a pin piece to be inserted into or removed from a gear slot of the seat rotating disk. When the seat needs to be rotated and adjusted, the pin piece is removed from the gear slot of the seat rotating disk, and the seat rotating disk is rotated in gears until the child seat is adjusted to a suitable gear. The pin piece is then re-engaged in the gear slot of the seat rotating disk to be locked, thereby achieving gear adjustment of the child seat.

Description

Technical Field

[0001] The present invention relates to the technical field of child seats, and in particular to an automatic rotation adjustment structure of a child seat and a use method thereof. Background Art

[0002] A child seat, also known as a child restraint system, is a seat designed for children of different ages (or weights) and installed in a car to effectively improve the safety of children riding in a car. The European regulation ECE R129 defines a child safety seat as: a child safety protection system that can be fixed to a motor vehicle and consists of a seat belt assembly or flexible components, adjustment mechanisms, accessories, etc. It can be combined with additional devices such as a portable crib, infant carrier, auxiliary seat or collision protection. In the event of a car collision or sudden deceleration, it can reduce the impact force on the child and restrict the child's body movement to reduce their injuries and ensure the child's safety in the car. It is widely used.

[0003] Most of the existing child seats are rigid seats without a rotation adjustment structure. Child seats with a rotation adjustment structure usually use a stepper motor and gear transmission to rotate the seat rotation disk for adjustment. However, this adjustment method is difficult to control. The seat often rotates too much or too little, making it difficult to ensure that the child seat is adjusted to the appropriate gear, which is inconvenient to use. Therefore, a child seat automatic rotation adjustment structure is needed to solve the above problem. Summary of the Invention

[0004] The object of the present invention is to provide an automatic rotation adjustment structure of a child seat and a method for using the same, so as to solve the problem that the existing child seat with a rotation adjustment structure proposed in the above background technology usually adopts a stepping motor and gear transmission to rotate the seat rotating disk for adjustment. However, this adjustment method has the problem of being difficult to control, and the seat rotation adjustment often occurs too much or too little, making it difficult to ensure that the child seat is adjusted to the appropriate gear, which is inconvenient to use.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic rotation adjustment structure for a child seat, comprising a rotation drive mechanism for a seat rotation disk and a gear locking mechanism;

[0006] The rotation drive mechanism of the seat rotating plate includes a stepper motor A, an adapter, a rotating shaft connected to the seat rotating plate, and a rotating shaft bracket. The rotating shaft of the seat rotating plate is rotatably arranged on the rotating shaft bracket, and the output end of the stepper motor A is connected to the rotating shaft through the adapter;

[0007] The rotating shaft bracket and the stepper motor A are both fixed in the lower cover of the seat base, and the upper cover of the seat base is sleeved on the outer side of the seat rotating disk;

[0008] The gear locking mechanism of the seat rotating disk includes a stepper motor B, a motor bracket, a receiving block, and a pin. The stepper motor B is fixed to the motor bracket, and the pin is located above the motor bracket. The output end of the stepper motor B drives the pin to move back and forth in a straight line through the receiving block. The seat rotating disk is provided with a plurality of gear slots. When the pin is engaged in the gear slot of the seat rotating disk, the gear is locked.

[0009] The motor bracket is fixed in the lower cover of the seat base, and the pin piece is inserted and arranged on the front side of the upper cover of the seat base.

[0010] Furthermore, a positioning plate is provided between the rotating shaft bracket and the seat rotating plate, and a proximity switch A is provided below the positioning plate, and the proximity switch A is fixed to the rotating shaft bracket through a mounting plate;

[0011] A proximity switch B and a proximity switch C are provided on one side of the pin piece, and both the proximity switch B and the proximity switch C are fixed to the motor bracket through a mounting plate.

[0012] Furthermore, the positioning plate is provided with a convex corner corresponding to the gear slot of the seat rotating plate, and the proximity switch A is located below the convex corner of the positioning plate. When the stepping motor A drives the seat rotating plate and the positioning plate to rotate, the switch is activated every time the convex corner of the positioning plate rotates to the sensing surface of the proximity switch A, so as to control the seat rotating plate to rotate according to the gear slot interval distance.

[0013] Furthermore, the number of gear slots provided on the seat rotating disk is 2-6, and the gear slots are evenly distributed in a circular array.

[0014] Furthermore, the proximity switch B and the proximity switch C on one side of the pin piece are arranged side by side at intervals. The proximity switch B is used for sensing the initial position of the pin piece, and the proximity switch C is used for sensing the displacement of the pin piece. The pin piece is in the initial position when it is inserted into the gear slot of the seat rotating disk. A positioning piece is also provided on the pin piece. When the pin piece is in the initial position, the positioning piece is aligned with the sensing surface of the proximity switch B. When the stepping motor B drives the pin piece to move, the positioning piece of the pin piece reciprocates between the initial position and the sensing surface of the proximity switch C to control the pin piece to be inserted into or moved out of the gear slot of the seat rotating disk.

[0015] Furthermore, a spring traction part is provided at the bottom of the pin piece, and a spring fixing part is provided on the upper cover of the seat base below the pin piece. A hook spring is also provided below the pin piece, one end of the hook spring is hooked to the spring traction part of the pin piece, and the other end of the hook spring is hooked to the spring fixing part of the upper cover.

[0016] Furthermore, the receiving block is installed on the output end of the stepper motor B. The receiving block is provided with a convex shaft on the side away from the output end of the stepper motor B. The pin piece is also provided with a waist-shaped hole. The convex shaft of the receiving block is inserted into the waist-shaped hole of the pin piece. When the output end of the stepper motor B rotates, the pin piece is driven to move back and forth in a straight line through the receiving block and the convex shaft.

[0017] Furthermore, when the convex shaft of the receiving block rotates one circle, the distance that the pin piece moves in a single direction is the same as the distance between the proximity switch B and the proximity switch C.

[0018] Furthermore, the stepper motor A, stepper motor B, proximity switch A, proximity switch B and proximity switch C are all connected to a controller.

[0019] A method for using an automatic rotation adjustment structure of a child seat comprises the following steps:

[0020] Step (A): When the seat needs to be rotated and adjusted, the controller is operated to adjust the position, the pin is in the initial position, and the seat rotating disk is in the locked state;

[0021] Step (B): First, start stepper motor B to operate. The output end of stepper motor B drives the receiving block and the cam shaft to rotate in a circular manner. The cam shaft of the receiving block pushes the pin piece to move linearly. The positioning member of the pin piece moves to the sensing surface of the proximity switch C. The cam shaft of the receiving block rotates half a circle, the pin piece moves out of the gear slot and pulls the hook spring to extend, releasing the lock state of the seat rotating plate. Then, stepper motor B is stopped.

[0022] Step (C): Next, start the stepper motor A to make it run. The output end of the stepper motor A drives the adapter and the rotating shaft to rotate. The rotating shaft drives the positioning plate and the seat rotating plate to rotate. In conjunction with the proximity switch A, the stepper motor A drives the seat rotating plate to rotate according to the gear slot interval.

[0023] Step (D): When the stepper motor A drives the seat rotating disk to rotate to a suitable position, the stepper motor A is stopped, thereby rotating and adjusting the entire seat;

[0024] Step (E): Finally, the stepper motor B is restarted to operate, and the cam of the receiving block pushes the pin piece to move linearly. The positioning member of the pin piece is reset to the initial position, that is, the positioning member of the pin piece moves to the sensing surface of the proximity switch B. The cam of the receiving block rotates another half circle, and the pin piece is re-engaged in the gear slot. The hook spring contracts, and the seat rotating disk is restored to the locked state. Then, the stepper motor B is stopped.

[0025] Step (F) To rotate and adjust the seat again, repeat steps (B) to (E).

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention is provided with a rotation drive mechanism and a gear locking mechanism for a seat rotating plate. The rotation drive mechanism cooperates with the positioning plate and the proximity switch A to control the seat rotating plate to rotate according to the gear interval. The gear locking mechanism cooperates with the proximity switch B, the proximity switch C and the positioning piece to control the pin piece to be clamped in or out of the gear slot of the seat rotating plate. When the seat needs to be rotated and adjusted, the pin piece is moved out of the gear slot of the seat rotating plate, and the seat rotating plate is rotated in gears until the child seat is adjusted to the appropriate gear. The pin piece is then re-inserted into the gear slot of the seat rotating plate to lock it, so as to realize the gear adjustment of the child seat, avoid the problem that the existing child seat is difficult to control during rotation adjustment, and ensure that the child seat is adjusted to the appropriate gear for easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the three-dimensional structure of the seat base of the present invention;

[0029] Figure 2 Schematic diagram of the three-dimensional structure inside the seat base of the present invention;

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the upper cover, seat rotating plate and gear locking mechanism of the present invention;

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the seat rotating plate of the present invention;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the seat rotating disk and the gear locking mechanism of the present invention;

[0033] Figure 6 Schematic diagram of the three-dimensional structure of the motor bracket and the stepping motor B of the present invention;

[0034] Figure 7 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0035] Figure 8 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0036] Figure 9 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0037] In the figure: 1. Seat rotating plate; 101. Gear slot; 2. Seat base; 201. Upper cover; 202. Lower cover; 203. Spring fixing part; 3. Stepper motor A; 4. Adapter; 5. Rotating shaft; 6. Rotating shaft bracket; 7. Stepper motor B; 8. Motor bracket; 9. Support block; 901. Protruding shaft; 10. Pin; 1001. Spring traction part; 1002. Positioning part; 1003. Waist-shaped hole; 11. Positioning plate; 12. Proximity switch A; 13. Proximity switch B; 14. Proximity switch C; 15. Hook spring. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1-9 , the present invention provides a technical solution: an automatic rotation adjustment structure of a child seat, comprising a rotation drive mechanism of a seat rotating disk 1 and a gear locking mechanism;

[0040] The rotary drive mechanism of the seat rotating plate 1 includes a stepper motor A3, an adapter 4, a rotating shaft 5 connected to the seat rotating plate 1, and a rotating shaft bracket 6. The rotating shaft 5 of the seat rotating plate 1 is rotatably mounted on the rotating shaft bracket 6, and the output end of the stepper motor A3 is connected to the rotating shaft 5 via the adapter 4.

[0041] The shaft bracket 6 and the stepper motor A3 are both fixed in the lower cover 202 of the seat base 2, and the upper cover 201 of the seat base 2 is sleeved on the outer side of the seat rotating disk 1;

[0042] The gear locking mechanism of the seat rotating disk 1 includes a stepper motor B7, a motor bracket 8, a receiving block 9, and a pin 10. The stepper motor B7 is fixed to the motor bracket 8, and the pin 10 is located above the motor bracket 8. The output end of the stepper motor B7 drives the pin 10 to move back and forth in a straight line through the receiving block 9. The seat rotating disk 1 is provided with a plurality of gear slots 101. When the pin 10 is engaged with the gear slot 101 of the seat rotating disk 1, the gear locking is achieved.

[0043] The motor bracket 8 is fixed in the lower cover 202 of the seat base 2 , and the pin piece 10 is inserted and arranged on the front side of the upper cover 201 of the seat base 2 .

[0044] In this embodiment, if Figure 2 、 7As shown, the rotating shaft 5 is located between the rotating shaft bracket 6 and the seat rotating plate 1 and a positioning plate 11 is provided. A proximity switch A12 is provided below the positioning plate 11, and the proximity switch A12 is fixed to the rotating shaft bracket 6 through a mounting plate;

[0045] A proximity switch B13 and a proximity switch C14 are provided on one side of the pin piece 10 , and both the proximity switch B13 and the proximity switch C14 are fixed to the motor bracket 8 through a mounting plate.

[0046] In this embodiment, if Figure 7 As shown, the positioning plate 11 is provided with a convex corner corresponding to the gear slot 101 of the seat rotating plate 1, and the proximity switch A12 is located below the convex corner of the positioning plate 11. When the stepping motor A3 drives the seat rotating plate 1 and the positioning plate 11 to rotate, the switch is activated every time the convex corner of the positioning plate 11 rotates to the sensing surface of the proximity switch A12, thereby controlling the seat rotating plate 1 to rotate according to the interval distance of the gear slot 101.

[0047] In this embodiment, if Figure 5 As shown, the number of the gear slots 101 provided on the seat rotating disk 1 is 2-6, and the gear slots 101 are evenly distributed in a circular array.

[0048] In this embodiment, if Figure 5 、 9 As shown, the proximity switch B13 and the proximity switch C14 on one side of the pin piece 10 are arranged side by side at intervals. The proximity switch B13 is used for sensing the initial position of the pin piece 10, and the proximity switch C14 is used for sensing the displacement of the pin piece 10. When the pin piece 10 is inserted into the gear slot 101 of the seat rotating disk 1, it is in the initial position. A positioning member 1002 is also provided on the pin piece 10. When the pin piece 10 is in the initial position, the positioning member 1002 is aligned with the sensing surface of the proximity switch B13. When the stepping motor B7 drives the pin piece 10 to move, the positioning member 1002 of the pin piece 10 reciprocates between the initial position and the sensing surface of the proximity switch C14 to control the pin piece 10 to be inserted into or moved out of the gear slot 101 of the seat rotating disk 1.

[0049] In this embodiment, if Figure 3 、 8 As shown, a spring traction member 1001 is provided at the bottom of the pin piece 10, and a spring fixing member 203 is provided below the pin piece 10 on the upper cover 201 of the seat base 2. A hook spring 15 is also provided below the pin piece 10, and one end of the hook spring 15 is hooked to the spring traction member 1001 of the pin piece 10, and the other end of the hook spring 15 is hooked to the spring fixing member 203 of the upper cover 201.

[0050] In this embodiment, if Figure 5 、 6As shown in Figure 9, the receiving block 9 is installed on the output end of the stepper motor B7. The receiving block 9 is located on the side away from the output end of the stepper motor B7 and is provided with a convex shaft 901. The pin piece 10 is also provided with a waist-shaped hole 1003. The convex shaft 901 of the receiving block 9 is inserted into the waist-shaped hole 1003 of the pin piece 10. When the output end of the stepper motor B7 rotates, the pin piece 10 is driven to move back and forth in a straight line through the receiving block 9 and the convex shaft 901.

[0051] In this embodiment, when the cam 901 of the receiving block 9 rotates one circle, the distance that the pin piece 10 moves in a single direction is the same as the spacing distance between the proximity switch B13 and the proximity switch C14, so that when the pin piece 10 performs linear reciprocating motion, the pin piece 10 can carry the positioning piece 1002 to move between the sensing surfaces of the proximity switch B13 and the proximity switch C14.

[0052] In this embodiment, the stepper motor A3, the stepper motor B7, the proximity switch A12, the proximity switch B13 and the proximity switch C14 are all connected to the controller, and the controller controls the operation of the stepper motor A3 and the stepper motor B7 according to the proximity switch A12, the proximity switch B13 and the proximity switch C14, which is the existing technology.

[0053] A method for using an automatic rotation adjustment structure of a child seat comprises the following steps:

[0054] Step (A): When the seat needs to be rotated and adjusted, the controller is operated to adjust the position of the pin 10, and the seat rotating disk 1 is locked;

[0055] Step (B): First, start the stepper motor B7 to operate. The output end of the stepper motor B7 drives the receiving block 9 and the cam 901 to rotate in a circular manner. The cam 901 of the receiving block 9 pushes the pin 10 to move linearly. The positioning member 1002 of the pin 10 moves to the sensing surface of the proximity switch C14. The cam 901 of the receiving block 9 rotates half a circle, and the pin 10 moves out of the gear slot 101 and pulls the hook spring 15 to extend, releasing the lock state of the seat rotating plate 1. Then, the stepper motor B7 is stopped.

[0056] Step (C): Next, start the stepper motor A3 to operate. The output end of the stepper motor A3 drives the adapter 4 and the rotating shaft 5 to rotate. The rotating shaft 5 drives the positioning plate 11 and the seat rotating plate 1 to rotate. The proximity switch A12 cooperates with the stepper motor A3 to drive the seat rotating plate 1 to rotate according to the interval of the gear slot 101.

[0057] Step (D): When the stepper motor A3 drives the seat rotating disk 1 to rotate to a suitable position, the stepper motor A3 is stopped, thereby rotating and adjusting the entire seat;

[0058] Step (E): Finally, the stepper motor B7 is restarted to operate, and the cam 901 of the receiving block 9 pushes the pin 10 to move linearly. The positioning member 1002 of the pin 10 is reset to the initial position, that is, the positioning member 1002 of the pin 10 moves to the sensing surface of the proximity switch B13. The cam 901 of the receiving block 9 rotates another half circle, and the pin 10 is re-engaged in the gear slot 101. The hook spring 15 contracts, restoring the seat rotating disk 1 to the locked state, and the stepper motor B7 is then stopped.

[0059] Step (F) To rotate and adjust the seat again, repeat steps (B) to (E).

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic rotation adjustment structure for a child seat, characterized in that: It includes a rotation drive mechanism of a seat rotating disk (1) and a gear locking mechanism; The rotation drive mechanism of the seat rotating disk (1) comprises a stepper motor A (3), an adapter (4), a rotating shaft (5) connected to the seat rotating disk (1), and a rotating shaft bracket (6); the rotating shaft (5) of the seat rotating disk (1) is rotatably arranged on the rotating shaft bracket (6); and the output end of the stepper motor A (3) is connected to the rotating shaft (5) via the adapter (4); The rotating shaft bracket (6) and the stepping motor A (3) are both fixed in the lower cover (202) of the seat base (2), and the upper cover (201) of the seat base (2) is sleeved on the outer side of the seat rotating disk (1); The gear locking mechanism of the seat rotating disk (1) includes a stepper motor B (7), a motor bracket (8), a receiving block (9) and a pin (10), wherein the stepper motor B (7) is fixed on the motor bracket (8), and the pin (10) is located above the motor bracket (8). The output end of the stepper motor B (7) drives the pin (10) to move back and forth linearly through the receiving block (9), and a plurality of gear slots (101) are provided on the seat rotating disk (1), and gear locking is achieved when the pin (10) is engaged in the gear slot (101) of the seat rotating disk (1); The motor bracket (8) is fixed in the lower cover (202) of the seat base (2), and the pin piece (10) is inserted and arranged on the front side of the upper cover (201) of the seat base (2); The rotating shaft (5) is located between the rotating shaft bracket (6) and the seat rotating plate (1), and a positioning plate (11) is also provided. A proximity switch A (12) is provided below the positioning plate (11), and the proximity switch A (12) is fixed to the rotating shaft bracket (6) through a mounting plate; a proximity switch B (13) and a proximity switch C (14) are provided on one side of the pin piece (10), and both the proximity switch B (13) and the proximity switch C (14) are fixed to the motor bracket (8) through a mounting plate; The proximity switch B (13) and the proximity switch C (14) on one side of the pin piece (10) are arranged side by side at intervals. The proximity switch B (13) is used for initial position sensing of the pin piece (10), and the proximity switch C (14) is used for displacement sensing of the pin piece (10). When the pin piece (10) is stuck in the gear slot (101) of the seat rotating disk (1), it is in the initial position. A positioning member (1002) is also provided on the pin piece (10). When the pin piece (10) is in the initial position, the positioning member (1002) is aligned with the sensing surface of the proximity switch B (13). When the stepping motor B (7) drives the pin piece (10) to move, the positioning member (1002) of the pin piece (10) is aligned with the sensing surface of the proximity switch B (13). 002) reciprocates between the initial position and the sensing surface of the proximity switch C (14) to control the pin piece (10) to be stuck in or moved out of the gear slot (101) of the seat rotating disk (1); a spring traction member (1001) is provided at the bottom of the pin piece (10), and a spring fixing member (203) is provided on the upper cover (201) of the seat base (2) below the pin piece (10), and a hook spring (15) is further provided below the pin piece (10), one end of the hook spring (15) is hooked to the spring traction member (1001) of the pin piece (10), and the other end of the hook spring (15) is hooked to the spring fixing member (203) of the upper cover (201); The receiving block (9) is mounted on the output end of the stepping motor B (7). The receiving block (9) is provided with a convex shaft (901) on a side away from the output end of the stepping motor B (7). The pin piece (10) is also provided with a waist-shaped hole (1003). The convex shaft (901) of the receiving block (9) is inserted into the waist-shaped hole (1003) of the pin piece (10). When the output end of the stepping motor B (7) rotates, the pin piece (10) is driven to move back and forth in a straight line through the receiving block (9) and the convex shaft (901).

2. The automatic rotation adjustment structure of a child seat according to claim 1, characterized in that: The positioning plate (11) is provided with a convex angle corresponding to the gear slot (101) of the seat rotating plate (1), and the proximity switch A (12) is located below the convex angle of the positioning plate (11). When the stepping motor A (3) drives the seat rotating plate (1) and the positioning plate (11) to rotate, the convex angle of the positioning plate (11) rotates to the sensing surface of the proximity switch A (12), causing the switch to operate, thereby controlling the seat rotating plate (1) to rotate according to the interval distance of the gear slot (101).

3. The automatic rotation adjustment structure of a child seat according to claim 2, characterized in that: The number of the gear slots (101) provided on the seat rotating disk (1) is 2-6, and the gear slots (101) are evenly distributed in a circular array.

4. The automatic rotation adjustment structure of a child seat according to claim 1, characterized in that: The distance that the pin piece (10) moves linearly in one direction when the convex shaft (901) of the receiving block (9) rotates one circle is the same as the distance between the proximity switch B (13) and the proximity switch C (14).

5. The automatic rotation adjustment structure of a child seat according to claim 1, characterized in that: The stepper motor A (3), the stepper motor B (7), the proximity switch A (12), the proximity switch B (13) and the proximity switch C (14) are all connected to the controller.

6. A method for using the automatic rotation adjustment structure of a child seat according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step (A): When the seat needs to be rotated and adjusted, the controller is operated to adjust the position, the pin (10) is in the initial position, and the seat rotating disk (1) is in a locked state; Step (B), first, start the stepper motor B (7) to make it run, the output end of the stepper motor B (7) drives the receiving block (9) and the cam (901) to rotate in a circular manner, and the cam (901) of the receiving block (9) pushes the pin piece (10) to move linearly, the positioning member (1002) of the pin piece (10) moves to the sensing surface of the proximity switch C (14), the cam (901) of the receiving block (9) rotates half a circle, the pin piece (10) moves out of the gear slot (101) and pulls the hook spring (15) to extend, thereby releasing the locking state of the seat rotating disk (1), and then stopping the stepper motor B (7); Step (C), secondly, start the stepper motor A (3) to make it run, the output end of the stepper motor A (3) drives the adapter (4) and the rotating shaft (5) to rotate, the rotating shaft (5) drives the positioning plate (11) and the seat rotating plate (1) to rotate, and cooperates with the proximity switch A (12) to make the stepper motor A (3) drive the seat rotating plate (1) to rotate according to the interval distance of the gear slot (101); Step (D): When the stepper motor A (3) drives the seat rotating disk (1) to rotate to a suitable position, the stepper motor A (3) is stopped, thereby rotating and adjusting the entire seat; Step (E), finally, start the stepper motor B (7) again to make it run, push the pin piece (10) to move linearly through the convex shaft (901) of the receiving block (9), and the positioning member (1002) of the pin piece (10) is reset to the initial position, that is, the positioning member (1002) of the pin piece (10) moves to the sensing surface of the proximity switch B (13), and the convex shaft (901) of the receiving block (9) rotates half a circle again, and the pin piece (10) is re-engaged in the gear slot (101), and the hook spring (15) contracts, restoring the seat rotating disk (1) to the locked state, and then stopping the stepper motor B (7); Step (F) To rotate and adjust the seat again, repeat steps (B) to (E).

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