JP2012096709A - Vehicle seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat device that reduces overall drive current flowing to a vehicle seat at the same time.SOLUTION: This vehicle seat device includes: a seat back 3 and an ottoman 4 each arranged on a vehicle seat 1 to be movable forward and backward; electric motors 11A, 11B, 21A, 21B two of which are arranged in each of the seat back 3 and the ottoman 4 to drive the seat back 3 or the ottoman 4 in cooperation with each other; and an ECU 31 for controlling the electric motors 11A, 11B, 21A, 21B. When driving the seat back 3 and the ottoman 4 at the same time when a relax mode is set by an operation switch 32, the ECU 31 drives the seat back 3 to a falling side requiring a low load only by drive power of the single electric motor 11A, and drives the ottoman 4 by drive power of the two electric motors 21A, 21B on a lifting side requiring a high load.

Description

  The present invention relates to a vehicle seat device.

  Conventionally, as a vehicle seat device, there are ones in which two electric motors are provided for one movable part provided in the vehicle seat, and the movable part can be driven jointly by the two electric motors. (For example, refer to Patent Document 1). In this vehicle seat device, when the movable portion is driven at a low speed, it is driven only by the driving force of one electric motor, and when the approach of an obstacle is detected and the movable portion is driven at a high speed, two electric motors are used. It is driven by the driving force of the motor.

JP 2005-119646 A

  By the way, the vehicle seat includes, for example, a seat back that can be moved to the side to be lowered and a side to be raised, an ottoman that can be moved to the side to hang down and the side to lift (foot), and a seat that can be moved to the rising side and the lower side A plurality of movable parts such as a cushion may be provided. For example, when two electric motors are provided for each movable part and a plurality of movable parts are driven at the same time, the plurality of movable parts are all driven by the driving force of two electric motors. In such a case, the total amount of drive current that flows simultaneously increases. This causes, for example, the necessity of increasing the diameter of the power supply line connected to the vehicle seat or causes malfunction of other electric devices provided in the vehicle.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle seat device that can reduce the total amount of driving current that simultaneously flows in the vehicle seat.

  In order to solve the above-described problem, in the invention according to claim 1, a plurality of movable parts provided on the vehicle seat so as to be movable forward and backward, respectively, and the movable part can be driven jointly. Two electric motors are provided for each movable part, and a control part that controls the electric motor. When the plurality of movable parts are simultaneously driven, the control part includes at least one movable part. The gist is to control to drive only by the driving force of one electric motor.

  According to this configuration, when simultaneously driving a plurality of movable parts, the control unit controls the at least one movable part to be driven only by the driving force of one electric motor. As compared with the case where each is driven by the driving force of two electric motors, it is possible to reduce the total amount of drive current that simultaneously flows in the vehicle seat. Therefore, for example, the diameter of the power supply line connected to the vehicle seat can be reduced. Further, for example, malfunction of another electric device provided in the vehicle is prevented.

  According to a second aspect of the present invention, in the vehicle seat device according to the first aspect, the movable part has a low load when moving in the forward direction and a high load when moved in the reverse direction. The gist of the invention is that, when simultaneously driving a plurality of the movable parts, the control part controls the movable parts to be driven in the forward direction only by the driving force of one electric motor.

  According to this configuration, when the control unit drives a plurality of movable units at the same time, the control unit controls the movable unit to be driven in the positive direction, which is a low load, with only the driving force of one electric motor. The total amount of drive current can be reduced without causing a major hindrance to the drive. In addition, the movable part to be driven in the reverse direction, which is a high load, is driven by the driving force of the two electric motors, so that the driving is not hindered.

  According to a third aspect of the present invention, in the vehicle seat device according to the first or second aspect, only one of the two electric motors provided for each of the movable parts has its own driving amount. A sensor capable of being detected, and the control unit controls to drive one of the electric motors having the sensor when the movable unit is driven only by the driving force of the one electric motor. Is the gist.

  According to this configuration, when the control unit drives the movable unit only with the driving force of one electric motor, the control unit drives one electric motor having a sensor capable of detecting its own drive amount. The movable amount (position) is not unclear.

  According to a fourth aspect of the present invention, in the vehicle seat device according to any one of the first to third aspects, only one of the two electric motors provided for one movable portion is provided. A sensor capable of detecting its own drive amount, and the control unit drives one of the electric motors having the sensor more than the other when the movable unit is driven by the driving force of the two electric motors. The gist is to control to drive first.

  According to this configuration, when the control unit drives (jointly) the movable unit with the driving force of the two electric motors, the control unit has one electric motor having a sensor capable of detecting its own drive amount from the other. In contrast, since the control is performed so that the other electric motor that does not have the sensor is driven first, the movable amount (position) of the movable portion can be detected with higher accuracy than when the other electric motor is driven first. That is, when the other electric motor having no sensor is driven first, and then one electric motor having the sensor is driven (slightly behind), the movable part of the other electric motor is slightly moved. Although the movement is not detected by the sensor of one of the electric motors, there is a possibility that the accuracy of the detected movable amount (position) of the movable part may be lowered, but this can be avoided.

  According to a fifth aspect of the present invention, in the vehicle seat device according to any one of the first to fourth aspects, only one of the two electric motors provided for one movable portion is provided. A sensor capable of detecting its own drive amount, and the control unit drives one of the electric motors having the sensor more than the other when the movable unit is driven by the driving force of the two electric motors. The gist is to control to stop later.

  According to this configuration, when the control unit drives (jointly) the movable unit with the driving force of the two electric motors, the control unit has one electric motor having a sensor capable of detecting its own drive amount from the other. However, since the control is performed so as to be stopped later, the movable amount (position) of the movable portion can be detected with higher accuracy than when the other electric motor having no sensor is stopped later. That is, when one electric motor having the sensor is stopped first, and then the other electric motor not having the sensor is stopped (slightly behind), a slight amount of the movable portion by the other electric motor is stopped. Although the movement is not detected by the sensor of one of the electric motors, there is a possibility that the accuracy of the detected movable amount (position) of the movable part may be lowered, but this can be avoided.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle seat apparatus which can reduce the whole drive current amount which flows into a vehicle seat simultaneously can be provided.

The schematic perspective view of the vehicle seat in this Embodiment. (A) (b) The model side view for demonstrating operation | movement of the vehicle seat in this Embodiment. (A) The flow figure when it is set as the relaxation mode in this Embodiment. (B) Flow diagram when changing from the relax mode to the normal mode. (A) (b) The schematic side view for demonstrating operation | movement of the vehicle seat of another example. (A) (b) The schematic side view for demonstrating operation | movement of the vehicle seat of another example. (A) (b) The schematic side view for demonstrating operation | movement of the vehicle seat of another example. (A) (b) The schematic side view for demonstrating operation | movement of the vehicle seat of another example.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a vehicle seat 1 is a rear seat provided on a vehicle floor, and is a seat cushion 2 and a seat as a movable portion that is rotatably supported at a rear end portion of the seat cushion 2. A back 3 and an ottoman 4 as a movable part supported rotatably at the front end of the seat cushion 2 are provided. The seat back 3 is supported at the rear end portion of the seat cushion 2 so as to be pivotable, so that the operation on the side to be tilted (movable in the forward direction) and the operation on the raising side (movable in the reverse direction) are possible. Yes. Further, the ottoman 4 is supported at the front end portion of the seat cushion 2 so as to be pivotable, so that the ottoman 4 moves downward (movable in the forward direction) and lifts (moves the foot) (movable in the reverse direction). Is possible.

  The vehicle seat 1 is provided with two electric motors 11A and 11B for the seat back 3 so that the seat back 3 can be driven jointly. The two electric motors 11A and 11B of the present embodiment are disposed on both sides of the vehicle seat 1 (both sides in the vehicle width direction). The output shafts of the electric motors 11 </ b> A and 11 </ b> B are connected via the connecting rod 12 and are connected so that the driving force (rotational force) rotates the seat back 3 with respect to the seat cushion 2. Yes. In addition, one of the two electric motors 11A and 11B provided for the seat back 3 has a sensor capable of detecting its own drive amount and, in turn, the movable amount (position) of the seat back 3. The rotation sensor 13 is provided.

  The vehicle seat 1 is provided with two electric motors 21A and 21B for the ottoman 4 so that the ottoman 4 can be driven jointly. The two electric motors 21A and 21B of the present embodiment are disposed on both sides of the vehicle seat 1 (both sides in the vehicle width direction). The output shafts of the electric motors 21 </ b> A and 21 </ b> B are connected via the connecting rod 22 and are connected so that the driving force (rotational force) rotates the ottoman 4 with respect to the seat cushion 2. . Further, one of the two electric motors 21A and 21B provided for the ottoman 4 has a rotation as a sensor capable of detecting its own drive amount, and hence the movable amount (position) of the ottoman 4. A sensor 23 is provided.

  The vehicle seat 1 is provided with an ECU 31 as a control unit for controlling the electric motors 11A, 11B, 21A, 21B. The ECU 31 includes the electric motors 11A, 11B, 21A, and 21B (including the rotation sensors 13 and 23), an operation switch 32 as operation means, a power supply line that connects the vehicle battery (not shown) to the vehicle seat 1, and the like. Electrically connected. For example, the operation switch 32 is provided so as to be exposed on one side surface of the seat cushion 2, and the ECU 31 controls the electric motors 11 </ b> A, 11 </ b> B, 21 </ b> A, 21 </ b> B according to the operation of the operation switch 32.

  The operation switch 32 according to the present embodiment includes a vehicle seat in addition to a switch for rotating the seat back 3 with respect to the seat cushion 2 and a switch for rotating the ottoman 4 with respect to the seat cushion 2. It has a dedicated switch for setting 1 to the relax mode.

  Then, the ECU 31 drives the seat back 3 with only the driving force of the single electric motor 11A on the side where the seat back 3 is lowered as shown in FIG. At the same time, the ottoman 4 is driven by the driving force of the two electric motors 21 </ b> A and 21 </ b> B on the lifting side, which is a high load.

  Specifically, the ECU 31 executes the processes of steps S1 to S8 shown in FIG. 3A in accordance with an operation for setting the relaxation mode. 3A, steps S1 to S3 are processes for the electric motors 11A and 11B corresponding to the seat back 3, and steps S4 to S8 are processes for the electric motors 21A and 21B corresponding to the ottoman 4. These processes are performed in parallel at the same time.

  In step S1, as shown in FIG. 2 (a), the ECU 31 supplies a drive current to only one electric motor 11A to drive the seat back 3 to the side where the load is lowered, and the next step S2 is performed. Transition. At this time, the ECU 31 drives one electric motor 11 </ b> A having the rotation sensor 13.

  In step S2, the ECU 31 proceeds to step S3 when the position (angle) of the seat back 3 coincides with the preset stop position (angle) of the relaxation mode based on the detection signal of the rotation sensor 13. In order to stop the electric motor 11A, the supply of the drive current is stopped.

  On the other hand, in step S4, as shown in FIG. 2 (a), the ECU 31 drives one electric motor 21A having the rotation sensor 23 to the other electric motor 21B in order to drive the ottoman 4 to the lifting side which becomes a high load. In the next step S5, the drive current is supplied to the other electric motor 21B, and the process proceeds to the next step S6. In the present embodiment, the interval from when the drive current is supplied to one electric motor 21A to when the drive current is supplied to the other electric motor 21B is, for example, 50 msec (milliseconds) to 100 msec (milliseconds). ) Is set.

  In step S6, the ECU 31 proceeds to step S7 when the position (angle) of the ottoman 4 matches the preset stop position (angle) of the relaxation mode based on the detection signal of the rotation sensor 23. In step S7, the ECU 31 stops the supply of the drive current to stop the other electric motor 21B not having the rotation sensor 23 before the one electric motor 21A, and in the next step S8, The supply of the drive current is stopped to stop one electric motor 21A. In the present embodiment, the interval from when the supply of drive current to the other electric motor 21B is stopped until the supply of drive current to one electric motor 21A is stopped is, for example, 50 msec (milliseconds). ) To 100 msec (milliseconds).

In this way, the vehicle seat 1 is set to the relax mode.
Further, the ECU 31 thereafter performs two electric motors 11A and 11B on the side where the seat back 3 is caused to become a high load, as shown in FIG. 2 (b), in response to an operation for changing from the relax mode to the normal mode. The ottoman 4 is driven only by the driving force of one electric motor 21A on the side where the ottoman 4 hangs down, which is a low load.

  Specifically, the ECU 31 executes the processes of steps S11 to S18 shown in FIG. 3B in response to an operation for changing from the relax mode to the normal mode. In FIG. 3B, steps S11 to S15 are processes for the electric motors 11A and 11B corresponding to the seat back 3, and steps S16 to S18 are processes for the electric motors 21A and 21B corresponding to the ottoman 4. These processes are performed in parallel at the same time.

  In step S11, as shown in FIG. 2 (b), the ECU 31 moves one electric motor 11A having the rotation sensor 13 from the other electric motor 11B in order to drive the seat back 3 to the side where the seat back 3 is raised. First, the drive current is supplied, and in the next step S12, the drive current is supplied to the other electric motor 11B, and the process proceeds to the next step S13. In the present embodiment, the interval from supplying the drive current to one electric motor 11A to supplying the drive current to the other electric motor 11B is, for example, 50 msec (milliseconds) to 100 msec (milliseconds). ) Is set.

  In step S13, when the position (angle) of the seat back 3 matches the stop position (angle) of the original normal mode before entering the relax mode based on the detection signal of the rotation sensor 13, the ECU 31 proceeds to step S14. Transition. In step S14, the ECU 31 stops the supply of the drive current to stop the other electric motor 11B not having the rotation sensor 13 before the one electric motor 11A. In the next step S15, In order to stop one electric motor 11A, supply of the drive current is stopped. In the present embodiment, the interval from the stop of the supply of the drive current to the other electric motor 11B to the stop of the supply of the drive current to the one electric motor 11A is, for example, 50 msec (milliseconds). ) To 100 msec (milliseconds).

  On the other hand, in step S16, as shown in FIG. 2 (b), the ECU 31 supplies the drive current to only one electric motor 21A to drive the ottoman 4 to the drooping side where the load is low, and the next step The process proceeds to S17. At this time, the ECU 31 drives one electric motor 21 </ b> A having the rotation sensor 23.

  In step S17, the ECU 31 proceeds to step S18 when the position (angle) of the ottoman 4 matches the stop position (angle) of the original normal mode before entering the relax mode based on the detection signal of the rotation sensor 23. Then, the supply of the drive current is stopped to stop the electric motor 21A.

In this way, the vehicle seat 1 is changed from the relax mode to the normal mode.
Next, characteristic effects of the above embodiment will be described below.
(1) When driving a plurality of movable parts (seat back 3 and ottoman 4) at the same time, one movable part (seat back 3 or ottoman 4) is driven only by the driving force of one electric motor 11A, 21A by the ECU 31. It is controlled to be driven. Therefore, as compared with the case where the plurality of movable parts (seat back 3 and ottoman 4) are simultaneously driven by the driving forces of the two electric motors 11A, 11B, 21A, and 21B, the entire flow of the vehicle seat 1 simultaneously The amount of drive current can be reduced. Therefore, for example, the diameter of the power supply line connected to the vehicle seat 1 can be reduced. Further, for example, malfunction of another electric device provided in the vehicle is prevented.

  (2) When simultaneously driving a plurality of movable parts (seat back 3 and ottoman 4), the ECU 31 drives the movable part (seat back 3 or ottoman 4) to be driven in the positive direction, which is a low load, with one electric motor 11A. , 21A is controlled to drive only. Therefore, it is possible to reduce the entire drive current amount without causing a major hindrance to the drive (for example, the torque becomes insufficient and the motor does not move). In addition, since the movable part (seat back 3 or ottoman 4) to be driven in the reverse direction, which is a high load, is driven by the driving force of the two electric motors 11A, 11B, 21A, and 21B, the driving is not hindered.

  (3) When the ECU 31 drives the movable part (the seat back 3 or the ottoman 4) only by the driving force of the single electric motor 11A, 21A, its own driving amount, and consequently the movable part (the seat back 3 or the ottoman 4). The one electric motor 11A, 21A having the rotation sensors 13, 23 capable of detecting the movable amount (position) is driven. Therefore, the movable amount (position) of the movable part (seat back 3 or ottoman 4) does not become unclear.

  (4) The ECU 31 can detect its driving amount when driving the movable part (seat back 3 or ottoman 4) with the driving force of the two electric motors 11A, 11B, 21A, 21B (in combination). Control is performed so that one of the electric motors 11A and 21A having the rotation sensors 13 and 23 is driven before the other. Therefore, on the contrary, the movable amount (position) of the movable portion (the seat back 3 or the ottoman 4) can be accurately compared with the case where the other electric motors 11B and 21B that do not have the rotation sensors 13 and 23 are driven first. Can be detected. That is, when the other electric motor 11B, 21B is driven first, a slight movement of the movable portion (seat back 3 or ottoman 4) by the other electric motor 11B, 21B is not detected by the rotation sensors 13, 23, The accuracy of the movable amount (position) of the detected movable part (seat back 3 or ottoman 4) may be lowered, but this can be avoided.

  (5) The ECU 31 can detect its driving amount when driving the movable part (seat back 3 or ottoman 4) with the driving force of the two electric motors 11A, 11B, 21A, 21B (in combination). Control is performed so that one of the electric motors 11A and 21A having the rotation sensors 13 and 23 is stopped after the other. Accordingly, the movable amount (position) of the movable portion (the seat back 3 or the ottoman 4) is detected with higher accuracy than when the other electric motors 11B and 21B that do not have the rotation sensors 13 and 23 are stopped later. can do. That is, if the one electric motor 11A, 21A is stopped first, slight movement of the movable portion (seat back 3 or ottoman 4) by the other electric motor 11B, 21B is not detected by the rotation sensors 13, 23. The accuracy of the movable amount (position) of the detected movable part (seat back 3 or ottoman 4) may be lowered, but this can be avoided.

  (6) The ECU 31 drives the ottoman 4 with a high load while driving the seat back 3 with only the driving force of one electric motor 11 </ b> A to the side where the seat back 3 is lowered, according to the operation of the relaxation mode by the operation switch 32. The side to be lifted is driven by the driving force of the two electric motors 21A and 21B. Therefore, the entire amount of drive current can be reduced without causing a major hindrance to each drive automatically.

  Further, the ECU 31 thereafter drives the seat back 3 to the side where the high load is caused by the driving force of the two electric motors 11A and 11B according to the operation of the operation switch 32 in the normal mode, and lowers the ottoman 4 The drive side is driven only by the driving force of one electric motor 21A on the hanging side as a load. Therefore, also in this case, it is possible to reduce the entire drive current amount without causing a great hindrance to each drive automatically.

  (7) When the seatback 3 is driven to the side where the seatback 3 is tilted and when the ottoman 4 is driven to the side where the ottoman 4 is suspended, the seatback 3 or the ottoman 4 is driven only by the driving force of one electric motor 11A, 21A. Even if something is caught between the vehicle floor, the force applied to it becomes smaller (than when driven by two electric motors 11A, 11B, 21A, 21B).

The above embodiment may be modified as follows.
In the above embodiment, the target movable parts are the seat back 3 and the ottoman 4, but other movable parts provided in the vehicle seat 1 (for example, the seat cushion 2 and the headrest that are movable up and down, the vehicle floor) However, it may be changed to a seat cushion 2 (vehicle seat 1 itself) or the like movable in the front-rear direction, or may be implemented in combination.

  For example, as shown in FIGS. 4 (a) and 4 (b), the vehicle seat 1 of this example (see FIG. 4) has two seat cushions 2 so that the seat cushion 2 can be driven together (up and down). Electric motors 41A and 41B are provided. In addition, one of the two electric motors 41A and 41B provided for the seat cushion 2 can detect its own drive amount, and hence the movable amount (position) of the seat cushion 2 up and down. A rotation sensor (not shown) as a sensor is provided.

  Then, as shown in FIG. 4A, the ECU 31 has two electric motors 11A on the side that raises the seat back 3 so as to make it easier for the occupant to get off when getting off the vehicle with a high vehicle height. , 11B, and the seat cushion 2 is driven only by the driving force of one electric motor 41A on the lowering side where the load is low. The above-described control is executed when the vehicle gets off from a vehicle with a high vehicle height, for example, in response to the operation of a switch for that purpose or the engine being stopped and the seat belt removed from the buckle. .

  In addition, the ECU 31 thereafter has one electric drive on the side where the seat back 3 is lowered to a low load, as shown in FIG. 4 (b), so as to be in the original position (normal mode) before getting off after getting on. While being driven by the driving force of the motor 11A, the seat cushion 2 is driven by the driving force of the two electric motors 41A and 41B on the ascending side which becomes a high load. The above-described control is executed after boarding, for example, in response to an operation of a switch for that purpose or according to the seat belt being attached to the buckle.

Even in this case, it is possible to reduce the total amount of drive current that simultaneously flows in the vehicle seat 1, and it is possible to obtain the same effect as the effect of the above-described embodiment.
Further, for example, the ECU 31 has two seat cushions 2 on the ascending side where the load becomes high, as shown in FIG. 5A, so that an occupant can easily get off when getting off a vehicle with a low vehicle height. While driving with the driving force of the electric motors 41A and 41B, the ottoman 4 is driven only with the driving force of the single electric motor 21A on the side where the load is lowered. The above-described control is executed when the vehicle gets off from a vehicle with a low vehicle height, for example, in response to an operation of a switch for that purpose or an engine stop and a seat belt removed from the buckle. .

  Further, the ECU 31 thereafter sets the seat cushion 2 on the lowering side, which is a low load, as shown in FIG. 5 (b) so as to be in the original position (normal mode) before getting off after getting on. While being driven by the driving force of the electric motor 41A, the ottoman 4 is driven by the driving force of the two electric motors 21A and 21B on the lifting side, which is a high load. The above-described control is executed after boarding, for example, in response to an operation of a switch for that purpose or according to the seat belt being attached to the buckle.

Even in this case, it is possible to reduce the total amount of drive current that simultaneously flows in the vehicle seat 1, and it is possible to obtain the same effect as the effect of the above-described embodiment.
In addition, for example, in response to an operation for setting the relaxation mode, the ECU 31 uses only the driving force of the single electric motor 11A on the side where the seat back 3 is lowered as shown in FIG. While driving, the seat cushion 2 is driven by the driving force of the two electric motors 41A and 41B on the ascending side which becomes a high load. It should be noted that tilting the seat back 3 and raising the seat cushion 2 prevents deterioration of forward visibility when the relax mode is set.

  Further, the ECU 31 thereafter performs two electric motors 11A and 11B on the side where the seat back 3 is caused to become a high load, as shown in FIG. 6B, in response to an operation for changing from the relax mode to the normal mode. And the seat cushion 2 is driven only by the driving force of one electric motor 41A on the descending side, which is a low load.

Even in this case, it is possible to reduce the total amount of drive current that simultaneously flows in the vehicle seat 1, and it is possible to obtain the same effect as the effect of the above-described embodiment.
Further, the plurality of movable parts that are driven simultaneously may be three or more.

  For example, as shown in FIG. 7A, the ECU 31 drives the seat back 3 with only the driving force of the single electric motor 11 </ b> A on the side where the seat back 3 is lowered, according to the operation for setting the relaxation mode. At the same time, the ottoman 4 is driven by the driving force of the two electric motors 21 </ b> A and 21 </ b> B on the lifting side, which is a high load. At the same time, the ECU 31 drives the seat cushion 2 to the ascending side, which is a high load, with the driving force of the two electric motors 41A and 41B.

  In addition, the ECU 31 thereafter performs two electric motors 11A and 11B on the side where the seat back 3 becomes a high load, as shown in FIG. 7B, in response to an operation for changing from the relax mode to the normal mode. The ottoman 4 is driven only by the driving force of one electric motor 21A on the side where the ottoman 4 hangs down, which is a low load. At the same time, the ECU 31 drives the seat cushion 2 on the lowering side, which is a low load, only by the driving force of the single electric motor 41A.

  In this way, in the relax mode, a total of five electric motors 11A, 21A, 21B, 41A, 41B are driven, and two electric motors 11A, 11B, 21A, 21B, Compared with the case of simultaneous driving with the driving forces of 41A and 41B, the total amount of driving current flowing simultaneously in the vehicle seat 1 can be reduced.

  When the relaxation mode is changed to the normal mode, a total of four electric motors 11A, 11B, 21A, 41A are driven, and two electric motors 11A, 11B, 21A, 21B, 41A, Compared to the case of simultaneous driving with the driving force of 41B, the total amount of driving current flowing simultaneously in the vehicle seat 1 can be greatly reduced.

  In the above embodiment, the ECU 31 has one movable part (seatback 3 or ottoman 4) that is driven in the positive direction that is a low load when simultaneously driving a plurality of movable parts (seatback 3 and ottoman 4). However, the present invention is not limited to this and may be controlled regardless of the load.

  In the above embodiment, the ECU 31 has one of the electric motors having the rotation sensors 13 and 23 when the movable part (the seat back 3 or the ottoman 4) is driven only by the driving force of the single electric motors 11A and 21A. 11A and 21A are driven, but the present invention is not limited to this, and other configurations and controls may be performed. For example, in the above embodiment, the electric motors 11A and 21A (41A) have the rotation sensors 13 and 23 capable of detecting their own drive amount and thus the movable amount (position) of the movable part. If the vehicle seat 1 has a sensor that directly detects the movable amount (position) of the movable part without having the control unit 23, control other than the above control is performed.

  -In above-mentioned embodiment, when ECU31 drives a movable part (seat back 3 or ottoman 4) with the drive force of two electric motor 11A, 11B, 21A, 21B (jointly), rotation sensor 13, Although one electric motor 11A, 21A having 23 is driven before the other, it is not limited to this, and other configurations and controls may be performed. For example, in the above embodiment, the electric motors 11A and 21A (41A) have the rotation sensors 13 and 23 capable of detecting their own drive amount and thus the movable amount (position) of the movable part. If the vehicle seat 1 has a sensor that directly detects the movable amount (position) of the movable part without having the control unit 23, control other than the above control is performed.

  -In above-mentioned embodiment, when ECU31 drives a movable part (seat back 3 or ottoman 4) with the drive force of two electric motor 11A, 11B, 21A, 21B (jointly), rotation sensor 13, Although one electric motor 11A, 21A having 23 is stopped after the other, it is not limited to this, and other configurations and controls may be performed. For example, in the above embodiment, the electric motors 11A and 21A (41A) have the rotation sensors 13 and 23 capable of detecting their own drive amount and thus the movable amount (position) of the movable part. If the vehicle seat 1 has a sensor that directly detects the movable amount (position) of the movable part without having the control unit 23, control other than the above control is performed.

  In the above embodiment, the two electric motors 11A and 11B (21A and 21B) are arranged on both sides (both sides in the vehicle width direction) of the vehicle seat 1, and their output shafts are connected via the connecting rod 12. Although it was set as the structure connected, as long as it can drive a movable part jointly, it is good also as what was connected with the other structure.

The technical idea that can be grasped from the above embodiment will be described below together with the effects thereof.
(A) In the vehicle seat device according to any one of claims 1 to 5, one of the movable portions is an operation on the side to be defeated so that the movement in the forward direction has a low load, and the movement in the opposite direction is performed. It is a seat back that is a movement on the side where the movement becomes a high load, and one of the other movable parts is a movement on the drooping side where the movement in the normal direction becomes a low load, and the movement in the opposite direction is possible. The ottoman is an operation on the lifting side that becomes a high load, and the control unit drives the driving force of one electric motor on the side that tilts the seat back to a low load according to the operation of the relaxation mode by the operating means. And the ottoman is driven by the driving force of the two electric motors on the lifting side, which becomes a high load, and then the seat back is subjected to a high load according to the normal mode operation of the operating means. On the waking side With driving by number of the driving force of the electric motor, the ottoman a low load to become the one on the side of the hanging the electric motor of a vehicle seat and wherein the driving only by the driving force.

  According to the same configuration, the control unit drives the seat back with only the driving force of one electric motor to the side where the seat back is lowered according to the operation of the relaxation mode by the operation means, and the ottoman is set to the high load. Since it is driven by the driving force of the two electric motors on the side to be lifted, the entire drive current amount can be reduced without causing any major obstacle to each drive automatically.

  Further, the control unit thereafter drives the seat back to the side where the high load is caused by the driving force of the two electric motors according to the operation in the normal mode of the operation means, and hangs the ottoman to the low load. In this case, the entire drive current amount can be reduced without causing any major obstacle to each drive.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Seat cushion (movable part), 3 ... Seat back (movable part), 4 ... Ottoman (movable part), 11A, 11B, 21A, 21B, 41A, 41B ... Electric motor, 13, 23 ... rotation sensor (sensor), 31 ... ECU (control part).

Claims (5)

A plurality of movable parts provided on the vehicle seat so as to be movable forward and backward,
Two electric motors provided for each movable part so that the movable part can be driven jointly;
A control unit for controlling the electric motor,
The said control part is a vehicle seat apparatus characterized by controlling to drive at least 1 said movable part only with the drive force of one said electric motor, when driving the said several movable part simultaneously. The vehicle seat device according to claim 1,
The movable part has a low load when moving in the forward direction and a high load when moved in the opposite direction,
The control unit is configured to control the movable unit that is driven in the forward direction only by driving force of one electric motor when simultaneously driving the plurality of movable units. apparatus. The vehicle seat device according to claim 1 or 2,
Only one of the two electric motors provided for each movable part has a sensor capable of detecting its own drive amount,
The control unit controls to drive one of the electric motors having the sensor when the movable unit is driven only by the driving force of one electric motor. . The vehicle seat device according to any one of claims 1 to 3,
Only one of the two electric motors provided for one movable part has a sensor capable of detecting its own drive amount,
The controller is configured to control one of the electric motors having the sensor to be driven before the other when the movable unit is driven by the driving force of the two electric motors. Vehicle seat device. The vehicle seat device according to any one of claims 1 to 4,
Only one of the two electric motors provided for one movable part has a sensor capable of detecting its own drive amount,
The control unit controls the one electric motor having the sensor to stop after the other when the movable unit is driven by the driving force of the two electric motors. Sheet equipment.

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