Seat memory-free driving motor control device

Abstract

The utility model belongs to the technical field of seats, and particularly relates to a memory-free driving motor control device for a seat, which comprises a seat front-back adjustment part, a backrest adjustment part, a height adjustment part, a leg support adjustment part and the like. When the switch is controlled, the first motor drives the sliding rail to move back and forth, a first proximity sensor and a second proximity sensor are correspondingly arranged on the sliding rail at the front limit position and the rear limit position where the seat moves back and forth, the seat is provided with a first relay and a second relay, the first relay and the second relay are powered on when the first proximity sensor and the second proximity sensor approach, and the first proximity sensor and the second proximity sensor provide control signals for the first relay and the second relay respectively. The front-back movement adjusting switch is pressed down, the first proximity sensor is closed after the seat moves forwards to the front limit position, and the first relay is powered on and disconnected to control the first motor to stop rotating; the rear movement adjusting switch is pressed down, the seat moves backwards to a rear limit position, and then the second relay is electrified and disconnected to control the first motor to stop rotating, and the device has the advantages that the motor is prevented from rotating in a locked mode, the noise is reduced, the structure is simple, and the price is low.

Description

Technical Field

[0001] This utility model belongs to the field of seat technology, and in particular relates to a seat drive motor control device without memory. Background Technology

[0002] As is well known, passenger car seats often feature multi-directional motor adjustment. Currently, some seats lack memory function and directly drive the motor with electricity, without any safety measures. Based on past experience, this has caused numerous problems, as follows:

[0003] 1. If the power is not cut off in time after the seat or backrest has reached its front or rear limit position, the motor will generate noise due to stalling, which will affect the reputation and quality of the seat manufacturer.

[0004] 2. Motor stalling can cause impact damage to the seat frame system.

[0005] 3. Motor stalling will cause a certain impact on the mechanical parts of the motor, which will affect the motor performance over time.

[0006] Therefore, there is an urgent need to design a seat that uses simple sensors to detect stall and then uses electrical control to ensure that the motor does not stall. Summary of the Invention

[0007] The purpose of this invention is to provide a seat memory-free drive motor control device that can prevent motor stalling from causing impact damage to the motor and the frame system, effectively prevent impacts, reduce noise, has a simple structure, and is inexpensive.

[0008] The purpose of this utility model is to solve the following problem:

[0009] A memoryless drive motor control device for a seat includes a slide rail and a seat slidably mounted on the slide rail. A first motor, controlled by a forward movement adjustment switch and a backward movement adjustment switch, drives the seat to move back and forth on the slide rail. A first proximity sensor is installed on the slide rail at the forward limit position of the seat's forward and backward movement, and a second proximity sensor is installed on the slide rail at the rear limit position. A first sensing block is installed on the seat, which is energized when the first and second proximity sensors are approached. The first and second proximity sensors provide control signals to a first relay and a second relay, respectively. When the forward movement adjustment switch is pressed, the seat moves forward to the forward limit position, and the first proximity sensor closes, energizing and deactivating the first relay to stop the first motor. When the backward movement adjustment switch is pressed, the seat moves backward to the rear limit position, and the second relay deactivates to stop the first motor.

[0010] As a further optimization of the above technical solution, one end of the normally closed terminal of the first relay and the second relay and one end of the control unit are both electrically connected to the positive terminal of the power supply. The other end of the control unit of the first relay and the second relay is connected to the negative terminal of the power supply after being connected in series with the first proximity sensor and the second proximity sensor, respectively. The other end of the normally closed terminal of the first relay and the second relay is electrically connected to the two normally open terminals of the front movement adjustment switch and the rear movement adjustment switch, respectively. The two terminals of the first motor are electrically connected to one end of the normally closed terminal of the front movement adjustment switch and the rear movement adjustment switch, respectively. The other end of the normally closed terminal of the front movement adjustment switch and the rear movement adjustment switch is electrically connected to the negative terminal of the power supply.

[0011] As a further optimization of the above technical solution, the seat includes a seat cushion and a backrest. The seat cushion and backrest are adjusted by a second motor controlled by a front rotation adjustment switch and a rear rotation adjustment switch, which drives the angle adjuster and the backrest to rotate to adjust the backrest angle. A third proximity sensor is provided at the front limit position of the backrest rotation, and a fourth proximity sensor is provided at the rear limit position of the backrest rotation. The third and fourth proximity sensors provide control signals to the third and fourth relays, respectively. When the front rotation adjustment switch is pressed, the backrest rotates forward to the front limit position, and the third proximity sensor closes, energizing the third relay to open and control the second motor to stop. When the rear rotation adjustment switch is pressed, the seat rotates backward to the rear limit position, and the second relay is energized to open and control the second motor to stop.

[0012] As a further optimization of the above technical solution, one end of the normally closed terminal of the third and fourth relays and one end of the control unit are both electrically connected to the positive terminal of the power supply. The other end of the control unit of the third and fourth relays is connected to the negative terminal of the power supply after being connected in series with the third and fourth proximity sensors, respectively. The other end of the normally closed terminal of the third and fourth relays is electrically connected to the two normally open terminals of the front and rear rotation adjustment switches, respectively. The two terminals of the second motor are electrically connected to one end of the normally closed terminal of the front and rear rotation adjustment switches, respectively. The other end of the normally closed terminal of the front and rear movement adjustment switches is electrically connected to the negative terminal of the power supply.

[0013] A memory-free drive motor control device for a seat includes a seat cushion and a backrest. The seat cushion and backrest are controlled by a front rotation adjustment switch and a rear rotation adjustment switch to drive a second motor to rotate an adjuster to adjust the front and rear rotation angles of the backrest. A third proximity sensor is installed at the front adjustment limit position of the backrest, and a fourth proximity sensor is installed at the rear adjustment limit position of the backrest. The adjuster is equipped with a second sensing block that is energized when the third and fourth proximity sensors are close. The third and fourth proximity sensors provide control signals to a third relay and a fourth relay, respectively. When the front rotation adjustment switch is pressed, the backrest rotates forward to the front limit position, and the third proximity sensor closes, energizing the third relay to open and stop the second motor. When the rear rotation adjustment switch is pressed, the seat rotates backward to the rear limit position, and the fourth relay opens and stops the second motor.

[0014] As a further optimization of the above technical solution, one end of the normally closed terminal and one end of the control unit of the third and fourth relays are both electrically connected to the positive terminal of the power supply. The other end of the control unit of the third and fourth relays is connected to the negative terminal of the power supply after being connected in series with the third and fourth proximity sensors, respectively. The other end of the normally closed terminal of the third and fourth relays is electrically connected to the two normally open terminals of the front and rear rotation adjustment switches, respectively. The two terminals of the second motor are electrically connected to one end of the normally closed terminal of the front and rear rotation adjustment switches, respectively. The other end of the normally closed terminal of the front and rear rotation adjustment switches is electrically connected to the negative terminal of the power supply.

[0015] As a further optimization of the above technical solution, the seat is slidably mounted on a slide rail. A forward movement adjustment switch and a backward movement adjustment switch installed on the seat control a first motor to drive the seat to move back and forth on the slide rail. A first proximity sensor is installed on the slide rail at the front limit position of the seat's forward and backward movement, and a second proximity sensor is installed on the slide rail at the rear limit position. The first and second proximity sensors provide control signals to a first relay and a second relay, respectively. When the forward movement adjustment switch is pressed, the seat moves forward to the front limit position, and the first proximity sensor closes, energizing and disengaging the first relay to stop the first motor. When the backward movement adjustment switch is pressed, the seat moves backward to the rear limit position, and the second relay disengages to stop the first motor.

[0016] As a further optimization of the above technical solution, one end of the normally closed terminal of the first relay and the second relay and one end of the control unit are both electrically connected to the positive terminal of the power supply. The other end of the control unit of the first relay and the second relay is connected to the negative terminal of the power supply after being connected in series with the first proximity sensor and the second proximity sensor, respectively. The other end of the normally closed terminal of the first relay and the second relay is electrically connected to the two normally open terminals of the front movement adjustment switch and the rear movement adjustment switch, respectively. The two terminals of the first motor are electrically connected to one end of the normally closed terminal of the front movement adjustment switch and the rear movement adjustment switch, respectively. The other end of the normally closed terminal of the front movement adjustment switch and the rear movement adjustment switch is electrically connected to the negative terminal of the power supply.

[0017] The advantages of this invention compared to the prior art are:

[0018] 1. This utility model can prevent motor stall from causing impact damage to the motor and the frame system, and can also effectively prevent impact noise.

[0019] 2. This utility model has a simple structure and is inexpensive. The twin relays are integrated into the switch circuit board. The cost of one twin relay is 4.5 yuan, and the cost of two proximity sensors (also known as proximity switches) is 4.5 * 2 = 9 yuan. The cost of the wiring harness is about 0.5 yuan. The cost of one circuit increases by about 10 yuan, which makes it easy to promote and apply. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the backrest rotation control device of this utility model.

[0021] Figure 2 This is a schematic diagram of the seat forward and backward movement control device of this utility model.

[0022] Figure 3 This is a circuit diagram of the seat forward and backward movement control device of this utility model.

[0023] Figure 4 This is a circuit diagram of the backrest rotation control device of this utility model. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-4 :

[0025] A memoryless drive motor control device for a seat includes a slide rail 18 and a seat 20 slidably mounted on the slide rail 18. A first motor U1, controlled by a forward movement adjustment switch S1 and a rear movement adjustment switch S2, drives the seat 20 to move back and forth on the slide rail 18. A first proximity sensor K1 is provided on the slide rail 18 at the front limit position 21 of the seat 20's forward and backward movement, and a second proximity sensor K2 is provided on the slide rail 18 at the rear limit position 23. A first sensing block 22 is provided on the seat 20 to be energized when approached by the first proximity sensor K1 and the second proximity sensor K2. The first proximity sensor K1 and the second proximity sensor K2 provide control signals to the first relay KJ1 and the second relay KJ2, respectively. When the forward movement adjustment switch S1 is pressed, the seat 20 moves forward to the front limit position 21, and the first proximity sensor K1 closes, energizing and disengaging the first relay KJ1 to stop the first motor U1. When the rear movement adjustment switch S2 is pressed, the seat 20 moves backward to the rear limit position 23, and the second relay KJ2 energizes and disengages to stop the first motor U1.

[0026] As a further optimization of the above technical solution, one end of the normally closed terminal of the first relay KJ1 and the second relay KJ2 and one end of the control unit are both electrically connected to the positive terminal of the power supply V1. The other end of the control unit of the first relay KJ1 and the second relay KJ2 is connected in series with the first proximity sensor K1 and the second proximity sensor K2 and then electrically connected to the negative terminal of the power supply V1. The other end 1 of the normally closed terminal of the first relay KJ1 and the second relay KJ2 is electrically connected to the two normally open terminals of the forward movement adjustment switch S1 and the rear movement adjustment switch S2, respectively. The two terminals of the first motor U1 are electrically connected to one end of the normally closed terminal of the forward movement adjustment switch S1 and the rear movement adjustment switch S2, respectively. The other end 2 of the normally closed terminal of the forward movement adjustment switch S1 and the rear movement adjustment switch S2 is electrically connected to the negative terminal of the power supply.

[0027] As a further optimization of the above technical solution, the seat 20 includes a seat cushion 12 and a backrest 10. The seat cushion 12 and the backrest 10 are adjusted by a front rotation adjustment switch S3 and a rear rotation adjustment switch S4, which are driven by an angle adjuster 11 driven by a second motor U2 to adjust the front and rear rotation angles of the backrest 10. A third proximity sensor K3 is provided at the front limit position 13 of the backrest 10, and a fourth proximity sensor K4 is provided at the rear limit position 15 of the backrest 10. The third proximity sensor K3 and the fourth proximity sensor K4 provide control signals to the third relay KJ3 and the fourth relay KJ4, respectively. When the front rotation adjustment switch S3 is pressed, the backrest 20 rotates forward to the front limit position 13, and the third proximity sensor K3 closes, and the third relay KJ3 is energized and disconnected to control the second motor U2 to stop. When the rear rotation adjustment switch S4 is pressed, the seat 20 rotates backward to the rear limit position 15, and the fourth relay KJ4 is energized and disconnected to control the second motor U2 to stop.

[0028] As a further optimization of the above technical solution, one end of the normally closed terminal of the third relay KJ3 and the fourth relay KJ4 and one end of the control unit are both electrically connected to the positive terminal of the power supply V1. The other end of the control unit of the third relay KJ3 and the fourth relay KJ4 is connected in series with the third proximity sensor K3 and the fourth proximity sensor K4 and then electrically connected to the negative terminal of the power supply V1. The other end 1 of the normally closed terminal of the third relay and the fourth relay is electrically connected to the two normally open terminals of the front rotation adjustment switch S3 and the rear rotation adjustment switch S4, respectively. The two terminals of the second motor U2 are electrically connected to one end of the normally closed terminal of the front rotation adjustment switch S3 and the rear rotation adjustment switch S4, respectively. The other end 2 of the normally closed terminal of the front rotation adjustment switch S3 and the rear rotation adjustment switch S4 is electrically connected to the negative terminal of the power supply V1.

[0029] A memoryless drive motor control device for a seat includes a seat 20 consisting of a seat cushion 12 and a backrest 10. The seat cushion 12 and the backrest 10 are controlled by a second motor U2 via a front rotation adjustment switch S3 and a rear rotation adjustment switch S4 to rotate an angle adjuster 11 to adjust the front and rear rotation angles of the backrest 10. A third proximity sensor K3 is provided at the front adjustment limit position 13 of the backrest 10, and a fourth proximity sensor K4 is provided at the rear adjustment limit position 15 of the backrest 10. The angle adjuster 11 is equipped with a sensor connected to the third proximity sensor K3 and the fourth proximity sensor K4. When proximity sensor K4 approaches, it senses and energizes the second sensing block 17. The third proximity sensor K3 and the fourth proximity sensor K4 provide control signals to the third relay KJ3 and the fourth relay KJ4, respectively. When the forward rotation adjustment switch S3 is pressed, the backrest 10 rotates forward to the front limit position 13, and the third proximity sensor K3 closes, and the third relay KJ3 is energized and disconnected to control the second motor U2 to stop. When the rear rotation adjustment switch S4 is pressed, the backrest 10 rotates backward to the rear limit position 15, and the fourth relay KJ4 is energized and disconnected to control the second motor U2 to stop.

[0030] As a further optimization of the above technical solution, one end of the normally closed terminal of the third relay KJ3 and the fourth relay KJ4 and one end of the control unit are both electrically connected to the positive terminal of the power supply V1. The other end of the control unit of the third relay KJ3 and the fourth relay KJ4 is connected in series with the third proximity sensor K3 and the fourth proximity sensor K4 and then electrically connected to the negative terminal of the power supply V1. The other end of the normally closed terminal of the third relay KJ3 and the fourth relay KJ4 is electrically connected to the two normally open terminals of the front rotation adjustment switch S3 and the rear rotation adjustment switch S4. The two terminals of the second motor U2 are electrically connected to one end of the normally closed terminal of the front rotation adjustment switch S3 and the rear rotation adjustment switch S4, and the other end of the normally closed terminal of the front rotation adjustment switch S3 and the rear rotation adjustment switch S4 is electrically connected to the negative terminal of the power supply V1.

[0031] As a further optimization of the above technical solution, the seat 20 is slidably mounted on the slide rail 18. The forward movement adjustment switch S1 and the rear movement adjustment switch S2 provided on the seat 20 control the first motor U2 to drive the seat 20 to move back and forth on the slide rail 18. A first proximity sensor K1 is provided on the slide rail 18 at the front limit position 21 of the forward and backward movement of the seat 20, and a second proximity sensor K2 is provided on the slide rail 18 at the rear limit position 23. The first proximity sensor K1 and the second proximity sensor K2 provide control signals to the first relay KJ1 and the second relay KJ2, respectively. When the forward movement adjustment switch S1 is pressed, the seat 20 moves forward to the front limit position 21, and the first proximity sensor K1 closes, and the first relay KJ1 is energized and disconnected to control the first motor U1 to stop. When the rear movement adjustment switch S2 is pressed, the seat 20 moves backward to the rear limit position 23, and the second relay KJ2 is energized and disconnected to control the first motor U1 to stop.

[0032] As a further optimization of the above technical solution, one end of the normally closed terminal of the first relay KJ1 and the second relay KJ2 and one end of the control unit are both electrically connected to the positive terminal of the power supply V1. The other end of the control unit of the first relay KJ1 and the second relay KJ2 is connected in series with the first proximity sensor K1 and the second proximity sensor K2 and then electrically connected to the negative terminal of the power supply V1. The other end of the normally closed terminal of the first relay KJ1 and the second relay KJ1 is electrically connected to the two normally open terminals of the forward movement adjustment switch S1 and the rear movement adjustment switch S2, respectively. The two terminals of the first motor U1 are electrically connected to one end of the normally closed terminal of the forward movement adjustment switch S1 and the rear movement adjustment switch S2, respectively. The other end of the normally closed terminal of the forward movement adjustment switch S1 and the rear movement adjustment switch S2 is electrically connected to the negative terminal of the power supply.

[0033] In use, when the forward adjustment switch S1 is pressed, the positive power supply enters the first motor U1 through the normally closed terminal of the first relay KJ1, and then connects to the negative power supply through the rear adjustment switch S2 to form a circuit. When the seat 20 moves forward to the front limit position 21, the first proximity sensor K1 closes, causing the first relay KJ1 to be energized and disconnected to control the first motor U1 to stop rotating, preventing the second motor U2 from stalling when it reaches its limit position, and also avoiding the possibility of the motor burning out due to stalling. When the rear adjustment switch S2 is pressed, the positive power supply enters the first motor U1 through the normally closed terminal of the second relay KJ2, and then connects to the negative power supply through the forward adjustment switch S2 to form a circuit. When the seat 20 moves backward to the rear limit position 23, the second proximity sensor K2 closes, causing the second relay KJ2 to be energized and disconnected to control the first motor U1 to stop rotating, preventing the first motor U1 from stalling when it reaches its limit position, and also avoiding the possibility of the motor burning out due to stalling.

[0034] Similarly: When the forward rotation adjustment switch S3 is pressed, the positive power supply enters the second motor U2 through the normally closed terminal of the third relay KJ3, and then connects to the negative power supply through the rear rotation adjustment switch S4 to form a circuit. When the backrest 10 is rotated to the front limit position 13, the third proximity sensor K3 closes, causing the third relay KJ3 to be energized and disconnected to control the second motor U2 to stop rotating, preventing the second motor U2 from stalling when it reaches the limit position, and also avoiding the possibility of the motor burning out due to stalling. When the rear rotation adjustment switch S4 is pressed, the positive power supply enters the second motor U2 through the normally closed terminal of the fourth relay KJ4, and then connects to the negative power supply through the forward movement adjustment switch S2 to form a circuit. When the backrest 10 is rotated to the rear limit position 15, the fourth proximity sensor K4 closes, causing the fourth relay KJ4 to be energized and disconnected to control the second motor U2 to stop rotating, preventing the second motor U2 from stalling when it reaches the limit position, and also avoiding the possibility of the motor burning out due to stalling.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that simple substitutions or modifications can still be made to the technical solutions or technical features described in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and substance of the technical solutions of the embodiments of this utility model, and are still within the protection scope of this utility model.

Claims

1. A seat memory-free drive motor control device, comprising a slide rail and a seat laid on the slide rail, wherein a first motor controlled by a forward movement adjustment switch and a backward movement adjustment switch of the seat drives the seat to move back and forth on the slide rail, characterized in that: A first proximity sensor is installed on the slide rail at the front limit position of the seat's forward and backward movement, and a second proximity sensor is installed on the slide rail at the rear limit position. The seat is equipped with a sensing block that is energized when the first and second proximity sensors are brought close. The first and second proximity sensors provide control signals to the first and second relays, respectively. When the forward movement adjustment switch is pressed, the seat moves forward to the front limit position, and the first proximity sensor closes, energizing and disengaging the first relay to stop the first motor. When the rear movement adjustment switch is pressed, the seat moves backward to the rear limit position, and the second relay disengages to stop the first motor.

2. The seat memory-free drive motor control device according to claim 1, characterized in that: One end of the normally closed terminal of the first and second relays and one end of the control unit are both electrically connected to the positive terminal of the power supply. The other end of the control unit of the first and second relays is connected to the negative terminal of the power supply after being connected in series with the first and second proximity sensors, respectively. The other end of the normally closed terminal of the first and second relays is electrically connected to the two normally open terminals of the forward and backward adjustment switches, respectively. The two terminals of the first motor are electrically connected to one end of the normally closed terminal of the forward and backward adjustment switches, respectively. The other end of the normally closed terminal of the forward and backward adjustment switches is electrically connected to the negative terminal of the power supply.

3. The seat memoryless drive motor control device according to claim 1, characterized in that: The seat includes a seat cushion and a backrest. The seat cushion and backrest are adjusted by a second motor controlled by a front rotation adjustment switch and a rear rotation adjustment switch. The second motor drives the angle adjuster and the backrest to rotate to adjust the backrest angle. A third proximity sensor is provided at the front limit position of the backrest rotation, and a fourth proximity sensor is provided at the rear limit position of the backrest rotation. The third proximity sensor and the fourth proximity sensor provide control signals to the third relay and the fourth relay, respectively. When the forward rotation adjustment switch is pressed, the backrest rotates forward to the front limit position, the third proximity sensor closes, and the third relay is energized and disconnected to control the first motor to stop; when the rear movement adjustment switch is pressed, the seat moves backward to the rear limit position, and the second relay is energized and disconnected to control the first motor to stop.

4. The seat memory-free drive motor control device according to claim 3, characterized in that: One end of the normally closed terminal and one end of the control unit of the third and fourth relays are electrically connected to the positive terminal of the power supply. The other end of the control unit of the third and fourth relays is connected to the negative terminal of the power supply after being connected in series with the third and fourth proximity sensors, respectively. The other end of the normally closed terminal of the third and fourth relays is electrically connected to the two normally open terminals of the front and rear rotation adjustment switches, respectively. The two terminals of the second motor are electrically connected to one end of the normally closed terminal of the front and rear rotation adjustment switches, respectively. The other end of the normally closed terminal of the front and rear rotation adjustment switches is electrically connected to the negative terminal of the power supply.

5. A seat without memory drive motor control device, comprising a seat cushion and a backrest, wherein the seat cushion and backrest are controlled by a front rotation adjustment switch and a rear rotation adjustment switch to drive a second motor to rotate an angle adjuster to adjust the front and rear rotation angle of the backrest, characterized in that: A third proximity sensor is provided at the front adjustment limit position of the backrest rotation, and a fourth proximity sensor is provided at the rear adjustment limit position of the backrest rotation. The angle adjuster is provided with a second sensing block that is energized when the third and fourth proximity sensors are close to it. The third and fourth proximity sensors provide control signals to the third and fourth relays, respectively. When the forward rotation adjustment switch is pressed, the third proximity sensor closes after the backrest rotates forward to the front limit position, and the third relay is energized and disconnected to control the second motor to stop; when the rear rotation adjustment switch is pressed, the fourth relay is energized and disconnected after the seat rotates backward to the rear limit position to control the second motor to stop.

6. A seat memory-free drive motor control device according to claim 5, characterized in that: One end of the normally closed terminal and one end of the control unit of the third and fourth relays are electrically connected to the positive terminal of the power supply. The other end of the control unit of the third and fourth relays is connected to the negative terminal of the power supply after being connected in series with the third and fourth proximity sensors, respectively. The other end of the normally closed terminal of the third and fourth relays is electrically connected to the two normally open terminals of the front and rear rotation adjustment switches, respectively. The two terminals of the second motor are electrically connected to one end of the normally closed terminal of the front and rear rotation adjustment switches, respectively. The other end of the normally closed terminal of the front and rear rotation adjustment switches is electrically connected to the negative terminal of the power supply.

7. A seat memory-free drive motor control device according to claim 5, characterized in that: The seat is slidably mounted on a slide rail. The forward movement adjustment switch and the backward movement adjustment switch on the seat control the first motor to drive the seat to move back and forth on the slide rail. A first proximity sensor is provided on the slide rail at the front limit position of the seat's forward and backward movement, and a second proximity sensor is provided on the slide rail at the rear limit position. The first proximity sensor and the second proximity sensor provide control signals to the first relay and the second relay, respectively. When the forward adjustment switch is pressed, the seat moves forward to the front limit position and the first proximity sensor closes, and the first relay is energized and disconnected to control the first motor to stop; when the rear adjustment switch is pressed, the seat moves backward to the rear limit position and the second relay is energized and disconnected to control the first motor to stop.

8. A seat memory-free drive motor control device according to claim 7, characterized in that: One end of the normally closed terminal of the first and second relays and one end of the control unit are both electrically connected to the positive terminal of the power supply. The other end of the control unit of the first and second relays is connected to the negative terminal of the power supply after being connected in series with the first and second proximity sensors, respectively. The other end of the normally closed terminal of the first and second relays is electrically connected to the two normally open terminals of the forward and backward adjustment switches, respectively. The two terminals of the first motor are electrically connected to one end of the normally closed terminal of the forward and backward adjustment switches, respectively. The other end of the normally closed terminal of the forward and backward adjustment switches is electrically connected to the negative terminal of the power supply.

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