Seat control device and seat control method

Abstract

To prevent the occurrence of pinching again at another place by a sheet reversely moved when the pinching occurs, and to shorten the time until the sheet stopped after the reverse movement is moved to a target position.SOLUTION: When the seat control device detects the occurrence of pinching while the seat 30 moves from the operation start position A to the target position M, the seat control device reversely rotates the motor to move the seat 30 from the pinching position B in the reverse direction by the reverse moving amount L6. In this case, since the reverse moving amount L6 is smaller than the sheet moving amount L5 from the operation start position A to the sandwiching position B, the sheet 30 moving in the reverse direction stops before reaching the operation start position A.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a device for controlling an electric seat installed in a vehicle or the like, and more particularly to a seat control device having a function for detecting whether a foreign object has been caught. [Background technology]

[0002] Some vehicles, such as automobiles, are equipped with power seats that move forward and backward by the rotation of a motor. Conventionally, the forward and backward position of such seats was adjusted by manually operating an operating unit located near the seat to move the seat forward or backward. Recently, however, vehicles equipped with an automatic driving function have appeared, which allows a user to pre-register a seat position that suits the user's preferences as a target position, and automatically moves the seat to that target position when the user gets in the vehicle.

[0003] In a vehicle equipped with such an automatic driving function, if the front seat automatically moves backward when there is a person or object between the front and rear seats, there is a risk that the person or object may become trapped between the front and rear seats, threatening safety. For this reason, the seat control device is required to have a function that detects the occurrence of entrapment and reverses the motor to move the seat forward and eliminate the entrapment.

[0004] When pinching occurs, the load on the motor increases, causing the current flowing through the motor to increase and the motor's rotation speed to decrease. Therefore, by detecting the amount of change (difference) in the motor's current and rotation speed over a predetermined period and comparing the detected value with a threshold, it is possible to determine whether pinching has occurred. Patent Documents 1 to 6 disclose techniques for pinching detection in seat position control.

[0005] When someone is pinched, the motor is rotated in the opposite direction to eliminate the pinch, a practice that has been practiced in power window devices that electrically open and close windows (see, for example, Patent Document 7). In the case of a power window device, if someone is pinched while the window is rising and closing, the window reverses and lowers, but the amount of reversal movement at this time is always constant. Furthermore, while the window is reversing, it is in an open state, so there is no risk of another pinch occurring. However, the situation is different when someone is pinched by a seat. A specific explanation will be given below.

[0006] 7 shows a situation in which a person is pinched when the seat slides forward or backward in a straight line. (a) shows the state before the sliding movement, in which the front seat (here, the driver's seat) 30 in which an occupant 50 is seated is located at a certain distance from the rear seat 40 in which an occupant 60 is seated. The seat 30 has a seat portion 31 that can move forward or backward in a straight line, and a backrest portion 32 that can tilt forward or backward.

[0007] In this state, if the occupant 50 performs an operation to automatically move the seat 30 to the target position M1, the seat cushion 31 of the seat 30 moves in the direction P (rearward) toward the target position M1, as shown in FIG. 7(b). At this time, if the target position M1 is set to a position closer to the rear as shown in the figure to ensure sufficient space for the driver's seat, for example, a part of the moving seat 30 will hit the legs of the rear seat occupant 60, as shown by the dashed line a. This prevents the seat 30 from moving any further, and the legs become pinched between the seats 30, 40. When this pinching is detected, the motor is reversed, and the seat 30 is reversed from the pinched position shown in FIG. 7(b) and moves in the direction Q (forward) shown in FIG. 7(c). This releases the pinched legs of the occupant 60.

[0008] However, the amount of movement of the seat 30 after reversing (reversal movement amount) only needs to be sufficient to eliminate pinching, and does not need to be a certain amount or more. Conversely, if the reversal movement amount is greater than necessary, the seat 30 will move forward a long distance, resulting in a situation where the legs of the front seat occupant 50 become pinched between the dashboard 70 and the seat 30, as shown by the dashed line b in FIG. 7(c). This is a problem specific to seat control devices that does not exist in power window devices. Furthermore, when the seat 30, which has stopped after reversing, is to be moved again from the position in FIG. 7(c) to the target position M1, it takes a long time due to the long movement distance.

[0009] Similar problems also exist when the seat is reclined, tilting forward or backward. Figure 8 shows the pinching situation in this case. (a) shows the state before the seat is reclined, with the backrest 32 of the seat 30 positioned away from the luggage 80 placed between the seats 30, 40.

[0010] In this state, when the occupant 50 performs an operation to automatically tilt the seat 30 to the target position M2, the backrest 32 of the seat 30 tilts in the direction P (rearward) toward the target position M2, as shown in FIG. 8(b). At this time, if the amount of tilt to the target position M2 is large, the backrest 32 will hit the luggage 80 and will not be able to tilt any further, as shown by the dashed line c, and the luggage 80 will become trapped between the seats 30, 40. When this trapping is detected, the motor is reversed, and the backrest 32 will reverse from the trapped position in (b) and tilt in the direction Q (forward) as shown in (c). This will release the trapped luggage 80.

[0011] However, even in this case, the amount of movement of the backrest 32 after inversion (inversion amount) only needs to be sufficient to eliminate pinching, and does not need to be a certain amount or more. Conversely, if the inversion amount is greater than necessary, the forward movement distance of the backrest 32 becomes long, and as shown by the dashed line d in Figure 8(c), a situation occurs in which the occupant 50 is pinched between the steering wheel 90 and the backrest 32. Furthermore, when the seat 30 that has stopped after inversion is moved again from the position in (c) to the target position M2, it takes a long time because of the long movement distance. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Korean Patent Publication No. 10-2020-0065312 [Patent Document 2] Korean Patent Publication No. 10-2020-0065302 [Patent Document 3] Korean Patent Publication No. 10-2013-0039104 [Patent Document 4] Chinese Patent Publication No. 109278594 [Patent Document 5] Japanese Patent Application Laid-Open No. 2016-129449 [Patent Document 6] Japanese Patent Application Laid-Open No. 2007-131138 [Patent Document 7] Japanese Patent Application Laid-Open No. 2016-142068 Summary of the Invention [Problem to be solved by the invention]

[0013] The object of the present invention is to prevent a sheet that is reversed when a pinch occurs from reoccurring at another location, and to shorten the time it takes for a sheet that has stopped after a reverse movement to move to a target position. [Means for solving the problem]

[0014] The seat control device according to the present invention has a function of automatically moving an electric seat, which is moved by the rotation of a motor, from an operation start position to a target position, and includes a pinch detection unit and a motor control unit. The pinch detection unit detects that an object has been pinched in the seat while it is moving to the target position. The motor control unit rotates the motor in the forward direction to move the seat to the target position, and when the pinch detection unit detects that an object has been pinched, rotates the motor in the reverse direction to move the seat a predetermined reversal movement amount in the opposite direction from the pinch position where the pinch occurred.

[0015] In the present invention, the reverse movement amount is smaller than the sheet movement amount from the operation start position to the sandwiching position, and the sheet moving in the reverse direction stops before reaching the operation start position.

[0016] In this invention, the amount of inversion movement is limited so that the sheet inverted at the pinch position does not move beyond the operation start position, which makes it possible to prevent the inverted sheet from becoming pinched at another location. Also, since the inverted sheet stops at a position that does not move beyond the operation start position, it is possible to shorten the time required to move the sheet from that position to the target position.

[0017] The seat control device of the present invention may further include a first switch that is operated when automatically moving the seat to a target position. In this case, after the seat has moved in the reverse direction and stopped, the motor control unit rotates the motor in the forward direction based on the operation of the first switch, thereby moving the seat to the target position.

[0018] The seat control device of the present invention may further include a second switch that is operated when manually moving the seat. In this case, the motor control unit rotates the motor in the forward direction based on the operation of the second switch after the seat has moved in the reverse direction and stopped, and moves the seat toward the target position while the second switch is being operated.

[0019] In the seat control device of the present invention, if the seat has a seat portion that can move straight forward and backward, the amount of seat movement is the movement distance of the seat portion, and if the seat has a backrest that can tilt forward and backward, the amount of seat movement is the tilt angle of the backrest. [Effects of the Invention]

[0020] According to the present invention, it is possible to prevent a sheet that is reversed when pinching occurs from becoming pinched again at another location, and it is also possible to shorten the time it takes for a sheet that has stopped after reverse movement to move to a target position. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a block diagram of an electric seat system including a seat control device according to a first embodiment of the present invention. [Figure 2] FIG. 10 is a diagram illustrating the operation of the seat in a normal state. [Figure 3] 10A and 10B are diagrams illustrating operations when pinching occurs. [Figure 4] 10A and 10B are diagrams illustrating movement of a sheet from a reversing position to a target position. [Figure 5] 4 is a flowchart showing a control procedure in the seat control device. [Figure 6] FIG. 5 is a block diagram of an electric seat system including a seat control device according to a second embodiment of the present invention. [Figure 7] 10A and 10B are diagrams illustrating pinching during a sliding operation of the seat. [Figure 8] 10A and 10B are diagrams illustrating pinching during a seat reclining operation. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] An embodiment of the present invention will be described with reference to the accompanying drawings. In the drawings, identical or corresponding parts are designated by the same reference numerals. In the following, a seat control device mounted on a vehicle will be taken as an example.

[0023] 1 shows an example of a seat control device 2 according to a first embodiment of the present invention and an electric seat system 100 using the same. The electric seat system 100 is mounted on a vehicle such as a four-wheeled automobile, and includes an operation unit 1, a seat control device 2, a motor drive circuit 3, a motor current detection unit 4, a motor rotation speed detection unit 5, a motor 6, a slide mechanism 7, and a seat 30. The seat 30 is an electric seat driven by the motor 6 and the slide mechanism 7.

[0024] The operation unit 1 includes a first switch 11 for automatic driving that is operated when automatically moving the seat 30 to a target position, and a second switch 12 for manual driving that is operated when manually moving the seat 30 to a desired position. The first switch 11 is provided, for example, on the inside of the driver's seat door, and the second switch 12 is provided, for example, on the side of the seat 30.

[0025] The seat control device 2 includes a motor control unit 21, an entrapment detection unit 22, a seat movement amount calculation unit 23, and a target position storage unit 24. The motor control unit 21 outputs a control signal to the motor drive circuit 3 to control the rotation of the motor 6 based on the operation states of the switches 11 and 12 of the operation unit 1, the detection result of the entrapment detection unit 22, the seat movement amount calculated by the seat movement amount calculation unit 23, etc.

[0026] Entrapment detection unit 22 detects whether an object (such as a person's leg or luggage) is trapped by seat 30, based on the current of motor 6 detected by motor current detection unit 4. Details of entrapment detection based on motor current are well known, and therefore will not be described here.

[0027] The seat movement amount calculation unit 23 calculates the amount of movement of the seat 30 based on the number of rotations of the motor 6 detected by the motor rotation number detection unit 5. In this case, the amount of movement is the distance moved by the seat 30. The motor rotation number detection unit 5 is configured, for example, by a rotation sensor that outputs a pulse signal in synchronization with the rotation of the motor 6.

[0028] The target position memory unit 24 is set with a target position for when the seat 30 is automatically driven by the first switch 11. After operating the second switch 12 to adjust the position of the seat 30 to a desired position, the position is stored in the target position memory unit 24 as the target position by operating a setting switch (not shown).

[0029] The seat control device 2 is composed of a microcomputer, and the functions of the motor control unit 21, the pinch detection unit 22, and the seat movement amount calculation unit 23 are actually realized by software, but for convenience they are illustrated here as hardware blocks.

[0030] The motor drive circuit 3 generates a drive voltage for rotating the motor 6 and supplies this to the motor 6. The motor 6 rotates using this drive voltage, and moves the seat 30 in the front-to-rear direction (direction α) via the slide mechanism 7. The slide mechanism 7 is connected to the motor 6 and the seat 30, and converts the rotational motion of the motor 6 into linear motion.

[0031] Next, the operation of the above-described electric seat system 100 will be described with reference to FIGS.

[0032] Figure 2 shows normal operation when no pinching has occurred. The seat 30 in Figure 2 is the same as the seat 30 in Figure 7, and is equipped with a seat portion 31 that can move forward and backward in a straight line, and a backrest portion 32 connected to this seat portion 31. In the following explanation, pinching caused by the straight movement of the seat portion 31 will be taken as an example.

[0033] In Figure 2, in the initial state before operation, the seat 30 is in the position indicated by the dashed line. The position of the seat 30 at this time is referred to as operation start position A. This operation start position A is expressed as the distance from the reference position U to the rear end of the seat portion 31. The reference position U is set at the left end position of the rail 7a that guides the movement of the seat 30. The rail 7a is provided in the slide mechanism 7 (Figure 1) described above.

[0034] In this initial state, when the first switch 11 (FIG. 1) of the operating unit 1 is operated, automatic driving is initiated, the motor 6 rotates forward, and the seat 30 moves in the direction P (rearward) toward the target position M, with the bottom 31 guided by the rails 7a. As described above, the target position M is a position that is stored in advance in the target position storage unit 24, and is expressed as a distance from the reference position U. When the seat 30 moves to the target position M, as indicated by the solid line, the forward rotation of the motor 6 stops, and the seat 30 automatically stops. At this time, the movement distance from the start of the seat 30's operation to its stop, i.e., the seat movement amount L, is L = |AM|.

[0035] FIG. 3 shows an example of the operation when pinching occurs.

[0036] As shown in FIG. 3(a), when the seat 30 moves from the operation start position A in the direction P (rearward) to the target position M and hits the leg 9 of an occupant seated in the rear seat 40, pinching occurs. If the position of the seat 30 at this time is pinching position B, the movement distance of the seat 30, i.e., the seat movement amount L5, is L5 = |AB|. When the pinching detection unit 22 (FIG. 1) detects the occurrence of pinching, the motor 6 stops once and then rotates in the reverse direction. As a result, the seat 30 turns around from pinching position B and moves in the direction Q (forward) as shown in FIG. 3(b). This eliminates the pinching of the leg 9.

[0037] When the reversed sheet 30 reaches the reverse position Z shown in FIG. 3(b), the reverse rotation of the motor 6 stops, and the sheet 30 also stops at this position. Here, the reverse position Z is located before the operation start position A in the direction Q, so the sheet 30 stops before reaching the operation start position A. At this time, the movement distance of the sheet 30 from the pinch position B to the reverse position Z, that is, the reverse movement amount L6, is L6 = |ZB|, and this reverse movement amount L6 is smaller than the sheet movement amount L5 (L6 <L5)。

[0038] In the original application of this application (Japanese Patent Application No. 2021-146651), the sheet movement amount from the operation start position A to the sandwiching position B was compared with a reference value, and the reverse movement amount was determined according to the result. In contrast, in the case of this application, the comparison between the sheet movement amount L5 shown in FIG. 3(a) and the reference value is not performed. And regardless of the magnitude of the sheet movement amount L5, the reverse movement amount L6 shown in FIG. 3(b) is always set to a value smaller than the sheet movement amount L5 (L6 < L5). Therefore, the sheet 30 reversed at the sandwiching position B always stops at the reverse position Z in front of the operation start position A.

[0039] After the sheet 30 stops at the reverse position Z, after the operator confirms that there are no people or objects between the sheets 30 and 40, by operating the first switch 11 (FIG. 1) again, as shown in FIG. 4, the sheet 30 is moved from the reverse position Z to the target position M. W indicates the movement amount of the sheet 30 at this time. In this case, since the reverse position Z is in front of the operation start position A, compared with the case where the reverse position is at a position E exceeding the operation start position A, the sheet movement amount W becomes smaller, and the movement time of the sheet 30 to the target position M can be shortened. Note that, instead of the first switch 11, the sheet 30 may be manually moved from the reverse position Z to the target position M by operating the second switch 12.

[0040] As described above, according to this embodiment, the reversed sheet 30 stops before reaching the operation start position A and does not exceed the operation start position A, so it is possible to avoid the occurrence of re-sandwiching at another location. Also, since the reverse position Z is in front of the operation start position A, the movement time of the sheet 30 from the reverse position Z to the target position M can be shortened.

[0041] FIG. 5 is a flowchart showing the procedure in the sheet control device 2 for executing the above-described operation.

[0042] In step S1, the motor control unit 21 determines whether the first switch 11 of the operation unit 1 is on. If the first switch 11 is on (step S1: YES), the process proceeds to step S2 and subsequent steps to perform automatic driving of the seat. In step S2, the pinch detection function of the pinch detection unit 22 is activated.

[0043] In the next step S3, under the control of the motor control unit 21, the motor drive circuit 3 operates to rotate the motor 6 in the forward direction, and automatic driving of the seat is initiated. As a result, the seat 30 moves from the operation start position A toward the target position M. During this time, in step S4, the pinch detection unit 22 detects whether or not there is pinch. Also, in step S5, the motor control unit 21 monitors whether or not the seat 30 has moved to the target position M, based on the seat movement amount calculated by the seat movement amount calculation unit 23.

[0044] If pinching is not detected (step S4: NO) and the seat 30 has not reached the target position M (step S5: NO), the automatic driving of step S3 continues. Then, if pinching is not detected (step S4: NO) and the seat 30 reaches the target position M (step S5: YES), the process proceeds to step S11. In step S11, the motor control unit 21 stops the motor 6, which also stops the seat 30.

[0045] On the other hand, if pinching is detected before the seat 30 reaches the target position M (step S4: YES), the process proceeds to step S6. In step S6, the motor control unit 21 identifies the pinching position B based on the seat movement amount calculated by the seat movement amount calculation unit 23. Next, in step S7, the motor control unit 21 temporarily stops the automatic driving by the forward rotation of the motor 6, and then rotates the motor 6 in the reverse direction to start the reversing operation of the seat. As a result, the seat 30 is reversed at the pinching position B and moves in the reverse direction (the direction Q shown in FIG. 3).

[0046] In the next step S8, the sheet 30 that has been inverted at the clamping position B is moved to the inversion position Z by the inversion operation, as shown in FIG. 3(b). When the sheet 30 has moved to the inversion position Z, the process proceeds to step S11, the motor 6 is stopped, and the sheet 30 also stops. As described above, the inversion movement amount L6 in step S8 is smaller than the sheet movement amount L5 (=|AB|), and therefore in step S11 the sheet 30 always stops just before the operation start position A.

[0047] If the first switch 11 is not on in step S1 (step S1: NO), the motor control unit 21 determines in step S12 whether the second switch 12 is on. If the second switch 12 is on (step S12: YES), the process proceeds to step S13, where the seat 30 is manually driven under the control of the motor control unit 21. This manual driving continues while the second switch 12 is on (step S14: NO). If the second switch 12 is turned off (step S14: YES), the motor control unit 21 stops the motor 6 to cancel the manual driving, and brings the seat 30 to a stopped state (step S11).

[0048] After the seat 30 has been moved to the inversion position in step S8 and is stopped in step S11, the seat 30 is moved automatically or manually to the target position M as described above. In the automatic case, steps S1 to S8 and S11 are executed by turning on the first switch 11 again, and the seat 30 is moved to the target position M by automatic driving. In the manual case, steps S12 to S14 and S11 are executed by turning on the second switch 12, and the seat 30 is moved to the target position M by manual driving.

[0049] In the above embodiment, an example of pinching caused by the movement of the seat portion 31 has been given, but the present invention can also be applied to cases where pinching occurs due to the tilt of the backrest portion 32 as explained in Fig. 8. An embodiment in this case is shown in Fig. 6.

[0050] FIG. 6 shows an example of a seat control device 20 according to a second embodiment of the present invention and an electric seat system 200 using the same. In FIG. 6, the operation unit 1 in FIG. 1 is replaced with a slide operation unit 1a and a reclining operation unit 1b. The slide operation unit 1a is provided with a first switch 11a for automatically driving the seat 31 and a second switch 12a for manually driving the seat 31. The reclining operation unit 1b is provided with a first switch 11b for automatically driving the backrest 32 and a second switch 12b for manually driving the backrest 32.

[0051] 6, in the seat control device 20, the motor control unit 21 in FIG. 1 is replaced with a first motor control unit 21a and a second motor control unit 21b, the motor drive circuit 3 in FIG. 1 is replaced with a first motor drive circuit 3a and a second motor drive circuit 3b, and the motor 6 in FIG. 1 is replaced with a first motor 6a and a second motor 6b. Also, the motor current detection unit 4 in FIG. 1 is replaced with a first motor current detection unit 4a and a second motor current detection unit 4b, and the motor rotation speed detection unit 5 in FIG. 1 is replaced with a first motor rotation speed detection unit 5a and a second motor rotation speed detection unit 5b.

[0052] 6, in addition to the slide mechanism 7, a reclining mechanism 8 is also provided. The first motor 6a moves the seat bottom 31 of the seat 30 in a straight line in the α direction via the slide mechanism 7. The second motor 6b tilts the backrest 32 of the seat 30 in the β direction via the reclining mechanism 8.

[0053] 6, the pinch detection unit 22 separately detects pinch by the seat 31 and pinch by the backrest 32. The seat movement amount calculation unit 23 separately calculates the movement amount (distance) of the seat 31 and the movement amount (angle) of the backrest 32. The target position storage unit 24 separately stores the target position (distance) of the seat 31 and the target position (angle) of the backrest 32.

[0054] In the second embodiment, the operation when pinching by the seat portion 31 occurs is the same as the operation in the first embodiment (FIGS. 3 to 5). Furthermore, the operation when pinching by the backrest portion 32 occurs is basically the same as the operation when pinching by the seat portion 31, except that the amount of movement and position of the backrest portion 32 are expressed by an inclination angle instead of a distance, and can be easily inferred from the first embodiment, so a detailed explanation will be omitted.

[0055] In addition to the above-described embodiment, the present invention can employ various other embodiments as follows.

[0056] In the above embodiment, after the seat 30 moves from the clamping position B to the reversing position Z and stops, the seat 30 is moved to the target position M by operating the first switch 11 or the second switch 12 (FIG. 4), but the present invention is not limited to this. For example, the seat 30 may be configured to automatically move to the target position M after a certain time has elapsed since the seat 30 stopped at the reversing position Z, without requiring the operation of the switches 11 and 12.

[0057] In the above embodiment, automatic driving of the seat 30 is initiated by operating the first switch 11, but instead, automatic driving of the seat 30 can be initiated based on communication with an electronic key used to lock or unlock the doors.

[0058] In the above embodiment, pinching is detected based on the motor current detected by the motor current detection unit 4, but instead, pinching may be detected based on the rotation speed of the motor 6 detected by the motor rotation speed detection unit 5.

[0059] 1, the motor drive circuit 3 is provided outside the seat control device 2, but the motor drive circuit 3 may be included in the seat control device 2. In addition, the motor current detection unit 4 and the motor rotation speed detection unit 5 may also be included in the seat control device 2.

[0060] In the above embodiment, a seat control device mounted on a vehicle is taken as an example, but the present invention can also be applied to seat control devices used in fields other than vehicles. [Explanation of symbols]

[0061] 1 Control section 2 Seat control device 6 motors 11 First Switch 12 Second Switch 21 Motor control unit 22 Entrapment detection unit 23 Seat movement amount calculation unit 24 Target position memory section 30 sheets 31 Seat area 32 Backrest A Operation start position B Clamping position C Standard value L5 Seat travel distance L6 Reverse movement amount M Target position Z inversion position

Claims

1. A seat control device having a function of automatically moving an electric seat that moves by the rotation of a motor from an operation start position to a target position, a pinch detection unit that detects whether an object is pinched by the seat while the seat is moving to the target position; a motor control unit that rotates the motor in a forward direction to move the sheet to the target position, and when the pinch detection unit detects pinch of the object, rotates the motor in a reverse direction to move the sheet by a predetermined reversal movement amount in a direction opposite to the pinch position where the pinch occurred, the amount of reversal movement is smaller than the amount of sheet movement from the operation start position to the sandwiching position, The motor control unit stops the seat moving in the reverse direction before the seat reaches the operation start position.

2. The seat control device according to claim 1, a first switch that is operated when the seat is automatically moved to the target position; The motor control unit rotates the motor in the forward direction to move the seat to the target position based on the operation of the first switch after the seat has moved in the reverse direction and stopped.

3. The seat control device according to claim 2, a second switch that is operated when the seat is manually moved; The motor control unit rotates the motor in the forward direction based on the operation of the second switch after the seat has moved in the reverse direction and stopped, and moves the seat toward the target position while the second switch is being operated.

4. The seat control device according to any one of claims 1 to 3, The seat has a seat portion that allows the seat to move forward and backward in a straight line, 10. A seat control device, wherein the seat movement amount is a movement distance of the seat portion.

5. The seat control device according to any one of claims 1 to 3, The seat has a backrest that can be tilted forward and backward, 10. A seat control device, wherein the seat movement amount is a tilt angle of the backrest portion.

6. A seat control method for automatically moving an electric seat that moves by rotation of a motor from an operation start position to a target position, comprising: a step of rotating the motor in a forward direction to move the seat to the target position; detecting that an object has been caught in the seat while the seat is moving to the target position; a step of reversing the motor when the pinch of the object is detected, and reversing the sheet in the opposite direction from the pinch position where the pinch occurred; and moving the inverted sheet by a reversing movement amount that is smaller than a sheet movement amount from the operation start position to the pinching position.

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