Vehicle seat, vehicle seat device, and vehicle interior device

Abstract

The purpose of the invention is to provide a vehicle seat, a vehicle seat device, and a vehicle interior device with which a drive control module and an operation module can be easily assembled and any increase in cost can be suppressed when an electric motor is provided in a vehicle in which a vehicle seat is installed.　A vehicle seat (S) comprises a seat back (2) and a reclining motor (41) that shifts the position of the seat back (2). The vehicle seat (S) further comprises a motor drive circuit (74) that drivably controls the reclining motor (41), and an operation unit (7) on which is mounted a switch circuit (73) that receives operations for instructing the action of the seat back (2), wherein the motor drive circuit (74) is installed in the operation unit (7).

Description

Vehicle seat, vehicle seat device, and vehicle interior device 【0001】 The present invention relates to a vehicle seat, a vehicle seat device, and a vehicle interior device, and particularly to a vehicle seat, a vehicle seat device, and a vehicle interior device including a movable body and an electric motor for displacing the movable body. 【0002】 Conventionally, vehicle seats have various movable bodies. Specific examples of the movable body include a seat back that can rotate with respect to the seat cushion, a slide rail device that slides the vehicle seat in the front-rear direction with respect to the vehicle, a lifting device that raises and lowers the vehicle seat, and the like. Such a movable body is configured to operate by a motor that is driven and controlled based on a control signal output by an ECU (Electronic Control Unit) provided in the vehicle seat. 【0003】 On the other hand, as is well known, various vehicles are manufactured according to purposes and uses, and diversification is progressing. Under such a background, in recent years, like vehicles, diversification and cost reduction of vehicle seats have been demanded, and commonalization and unitization of components of vehicle seats have been promoted. Patent Document 1 describes an electronic circuit unit that can absorb differences between a plurality of types of motor drive control modules developed with the diversification of vehicle seats and utilize a common ECU. 【0004】 Japanese Patent Application Laid-Open No. 2006-62593 【0005】 According to the technique described in Patent Document 1, since a common ECU can be used for a vehicle seat provided with a motor drive control module, the cost of the vehicle seat can be suppressed. However, when a motor is provided in a vehicle seat, an operation module for instructing the operation of the movable body together with the motor drive control module is required, but Patent Document 1 does not describe an operation module, and a suitable mounting method for both has not been sufficiently studied. 【0006】The present invention has been made in view of the above problems, and its object is to provide a vehicle seat, a vehicle seat device, and a vehicle interior device that allow for easy assembly of a drive control module and an operation module when an electric motor is installed in a vehicle equipped with a vehicle seat, while suppressing cost increases. 【0007】 The aforementioned problems are solved by the vehicle seat of the present invention, which comprises a movable body and an electric motor for displacing the movable body, and further comprises a drive control module for driving and controlling the electric motor and an operation unit on which an operation module for receiving operations to instruct the movement of the movable body is mounted, wherein the drive control module is mounted on the operation unit. 【0008】 Furthermore, the aforementioned problems are solved by the vehicle seat device of the present invention, which is mounted on a vehicle and comprises a vehicle seat equipped with a movable body and an electric motor for displacing the movable body, and an operation unit on which an operation module for receiving operations to instruct the movement of the movable body is mounted, wherein a drive control module for driving and controlling the electric motor is mounted on the operation unit. 【0009】 Furthermore, the aforementioned problems are solved by the vehicle interior device of the present invention, which is mounted on a vehicle and comprises a vehicle seat, a movable body provided on the vehicle and an electric motor for displacing the movable body, and an operation unit on which an operation module for receiving operations to instruct the movement of the movable body is mounted, wherein a drive control module for driving and controlling the electric motor is mounted on the operation unit. 【0010】 According to the above configuration, since both the drive control module for driving and controlling the electric motor and the operation module for instructing the movement of the movable body are implemented in the operation unit, it is possible to provide a vehicle seat, vehicle seat device, and vehicle interior device that can be easily assembled and costs can be suppressed. 【0011】Furthermore, the vehicle seat includes an electronic control unit configured separately from the operating unit, and the drive control module has an input section that can be connected to either the electronic control unit or the operating module. When the input section is connected to the electronic control unit, the motor is driven and controlled based on a control signal output by the electronic control unit, and when the input section is connected to the operating module, the motor is driven and controlled based on an operation signal output by the operating module. With the above configuration, the operating unit can be standardized whether the drive control module is connected to the electronic control unit or the operating module, thus enabling cost reduction through standardization. In addition, since the operating unit and the electronic control unit are configured separately, the electronic control unit can be miniaturized. 【0012】 Furthermore, the vehicle seat comprises a plurality of movable bodies and a plurality of electric motors that displace each of the plurality of movable bodies, and the operation module preferably includes a plurality of operation switches that receive operations to instruct the movement of each of the plurality of movable bodies, an identification information assigning unit that enables the electronic control unit to identify the plurality of operation signals output in response to operations on the plurality of operation switches, a first output unit connectable to the electronic control unit, and a second output unit connectable to the input unit of the drive control module. With the above configuration, since the identification information assigning unit can identify the plurality of operation signals, the operation signals can be output via the first output unit which has a common signal line, and the number of signal lines between the operation unit and the electronic control unit can be reduced. 【0013】 Furthermore, the drive control module may have multiple drive circuits for controlling the drive of each of the multiple electric motors, and the second output unit may output the multiple operation signals output by the multiple operation switches to the multiple drive circuits corresponding to each of the multiple operation switches. With the above configuration, since the multiple operation switches and drive circuits are individually connected via the second output unit, inspection work on the operation switches, drive circuits, and electric motors can be easily performed. 【0014】 Furthermore, the vehicle seat comprises a plurality of movable bodies and a plurality of electric motors that displace each of the plurality of movable bodies, and the operation module preferably includes a plurality of operation switches that receive operations to instruct the movement of each of the plurality of movable bodies, a plurality of voltage divider resistors connected to each of the plurality of operation switches and having mutually different resistance values, a common output terminal that can be connected to the electronic control unit and outputs each of the plurality of operation signals in an identifiable manner based on the signal level, and a plurality of individual output terminals that can be connected to the input section of the drive control module and output each of the plurality of operation signals individually. With the above configuration, since the signal levels of the plurality of operation signals can be made different from each other by the voltage divider resistors, the operation signals can be output via a common signal line, and the number of signal lines between the operation unit and the electronic control unit can be reduced. In addition, since the plurality of operation switches and drive circuits are connected individually, inspection work of the operation switches, drive circuits and electric motors can be easily performed. 【0015】 Furthermore, the operating module may have a reverse current prevention diode connected in series with each of the multiple voltage divider resistors. With the above configuration, the reverse current prevention diode connected in series with the voltage divider resistors makes it possible to prevent the multiple operating switches from electrically influencing each other. 【0016】 Furthermore, the drive control module may include a PWM drive control circuit that, when the input unit is connected to the electronic control unit, controls the motor using PWM based on a PWM control signal output by the electronic control unit, and a bypass connection unit that, when the input unit is connected to the operation module, bypasses the PWM drive control circuit. With the above configuration, the drive control module can be standardized whether or not PWM control is performed on the motor, thereby enabling cost reduction through standardization. 【0017】Furthermore, the drive control module has a PWM drive control circuit that, when the input section is connected to the electronic control unit, drives the motor in PWM based on the PWM control signal output by the electronic control unit. The PWM drive control circuit has a semiconductor switch, and the control terminal of the semiconductor switch receives the PWM control signal output by the electronic control unit. When the input section is connected to the electronic control unit, the semiconductor switch is connected in series with the motor. When the input section is connected to the operation module, the semiconductor switch is bypassed. With the above configuration, the drive control module can be standardized whether PWM control of the motor is performed or not, thereby enabling cost reduction through standardization. 【0018】According to the present invention, it is possible to provide a vehicle seat, a vehicle seat device, and a vehicle interior device that allow for easy assembly of a drive control module and an operation module while suppressing cost increases. Furthermore, since the operation unit can be common to both the case where the drive control module is connected to an electronic control unit and the case where it is connected to an operation module, cost reductions can be achieved through commonality. In addition, since the operation unit and the electronic control unit are configured as separate components, the electronic control unit can be miniaturized. Furthermore, since the identification information assigning unit enables the identification of multiple operation signals, the operation signals can be output via a first output unit having a common signal line, thereby reducing the number of signal lines between the operation unit and the electronic control unit. Furthermore, since multiple operation switches and drive circuits are individually connected via a second output unit, inspection work on the operation switches, drive circuits, and electric motors can be easily performed. Furthermore, since the signal levels of multiple operation signals can be made different from each other by using a voltage divider resistor, the operation signals can be output via a common signal line, thereby reducing the number of signal lines between the operation unit and the electronic control unit. Furthermore, by using a reverse current prevention diode connected in series with the voltage divider resistor, it is possible to prevent multiple switches from electrically influencing each other. Furthermore, since the drive control module can be standardized whether or not PWM control is performed on the electric motor, cost reductions can be achieved through this standardization. 【0019】 This is a perspective view of the vehicle seat of this embodiment, viewed from the front at an oblique angle. This is a front view of the operating unit. This is a functional configuration diagram of the vehicle seat. This is a circuit configuration diagram of the ECU, operating unit, and motor. This is a circuit configuration diagram of the operating unit and motor according to the first modified example. This is a circuit configuration diagram of the ECU, operating unit, and motor according to the second modified example. This is a circuit configuration diagram of the operating unit and motor according to the second modified example. This is a circuit configuration diagram of the motor drive circuit according to the third modified example. This is a circuit configuration diagram of the motor drive circuit according to the fourth modified example. This is a circuit configuration diagram of the motor drive circuit (series connection) according to the fifth modified example. This is a circuit configuration diagram of the motor drive circuit (parallel connection) according to the fifth modified example. 【0020】 The configuration of a vehicle seat according to an embodiment of the present invention (this embodiment) will be described below with reference to the drawings. However, the embodiment described below is merely an example to facilitate understanding of the present invention and does not limit the present invention. That is, the present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included in the present invention. 【0021】 In the following, a vehicle seat S installed in a passenger car will be given as an example of a vehicle seat, and its configuration will be explained. In the following explanation, "seat front-rear direction" refers to the front-rear direction of the vehicle seat S, which coincides with the direction of travel when the vehicle is moving. "Seat width direction" refers to the width direction of the vehicle seat S, which coincides with the left-right direction as seen from the perspective of an occupant seated on the vehicle seat S. "Vertical direction" refers to the vertical direction of the vehicle seat S, which coincides with the vertical direction when the vehicle is traveling on a horizontal plane. The outer and inner directions are determined with respect to the occupant. That is, the direction approaching the center in the seat width direction is the inner direction, and the direction moving away from the center is the outer direction. Configurations provided as a pair on the left and right will be assigned a common number, and when specifying the left and right, "left side" or "right side" will be added to the name indicating the configuration, and the letters "L" or "R" will be added to the symbol. 【0022】 <Vehicle Seat S> The overall configuration of the vehicle seat S according to this embodiment will be outlined with reference to Figure 1. Figure 1 is a perspective view of the vehicle seat S according to this embodiment, taken from the front at an oblique angle. In Figure 1, for illustrative purposes, a portion of the vehicle seat S is shown with the surface material Tr removed, exposing the pad material P. 【0023】As shown in Figure 1, the vehicle seat S according to this embodiment mainly comprises a seat cushion 1, a seat back 2, a headrest 3, a reclining device 4, a slide rail device (not shown), and a lifting device (not shown). Hereinafter, the seat cushion 1, seat back 2, and headrest 3 may be collectively referred to as the seat body. The seat back 2 can rotate relative to the seat cushion 1 by the reclining device 4 and corresponds to the movable body of the present invention. The seat body can move in the front-rear direction by the slide rail device and can move up and down in the vertical direction by the lifting device and corresponds to the movable body of the present invention. 【0024】 <<Seat Cushion 1>> The seat cushion 1 is a support member that supports the buttocks of an occupant sitting on a vehicle seat S, and supports the occupant from below. The seat cushion 1 has a seat cushion frame (not shown) that forms the skeleton of the seat cushion 1, a pad material P placed on the seat cushion frame, and a surface material Tr that covers the pad material P. The seat cushion 1 has a seating portion 1a that is formed as a seating surface when an occupant sits on it, and left and right embankment portions 1b that are arranged on the outer side of the seating portion 1a. The upper surface of the embankment portions 1b protrudes upward from the seating surface of the seating portion 1a. 【0025】 The seat cushion 1 is equipped with an ECU 6 and an operating unit 7. The ECU 6 is an electronic control unit that controls the electrical components installed in the vehicle seat S. The ECU 6 is mounted on the seat cushion frame below the seating area 1a. 【0026】As shown in Figure 2, the operating unit 7 is equipped with a reclining switch 71 and a lifting switch 72. The reclining switch 71 receives an operation to instruct the rotational movement of the seat back 2 relative to the seat cushion 1. More specifically, the reclining switch 71 has a reclining button 71a and a forward tilt button 71b, and receives a press operation on either the reclining button 71a or the forward tilt button 71b. By pressing the reclining button 71a, the occupant can displace the seat back 2 so that it tilts backward. By pressing the forward tilt button 71b, the occupant can displace the seat back 2 so that it tilts forward. Furthermore, by releasing the press operation on the reclining button 71a and the forward tilt button 71b, the occupant can stop the rotation of the seat back 2. 【0027】 The lifting switch 72 receives input for instructing the lifting and lowering of the seat body. More specifically, the lifting switch 72 has an upward button 72a and a downward button 72b, and receives a press operation on either the upward button 72a or the downward button 72b. By pressing the upward button 72a, the occupant can displace the seat body to rise. By pressing the downward button 72b, the occupant can displace the seat body to lower. Furthermore, by releasing the press operation on the upward button 72a and the downward button 72b, the occupant can stop the lifting and lowering of the seat body. 【0028】 <<Seatback 2>> The seatback 2 is a support member that supports the back of the occupant, and supports the occupant from the rear. The seatback 2 has a seatback frame (not shown) that forms the skeleton of the seatback 2, a pad material P that is placed on the seatback frame, and a surface material Tr that covers the pad material P. The seatback 2 has a backrest portion 2a that is formed as the backrest surface when the occupant is seated, and left and right embankment portions 2b that are arranged on the outer sides of the backrest portion 2a. The front surface of the embankment portions 2b protrudes forward from the backrest surface of the backrest portion 2a. 【0029】<<Headrest 3>> The headrest 3 is a support member that supports the head of the seated person, and supports the seated person's head from behind. The headrest 3 has a headrest frame (not shown) that forms the skeleton of the headrest 3. The headrest 3 has a pad material P for the headrest 3 that covers the headrest frame, and a surface material Tr that covers the pad material P. 【0030】 The pad material P is a cushioning material and is formed from a urethane resin (foamed resin), such as soft polyurethane foam. The pad material P may also be formed from biomass urethane. The surface material Tr that covers the pad material P is formed from, for example, a stretchable synthetic leather material. The surface material Tr may also be formed from cloth, film, leather, etc. 【0031】 <<Reclining device 4>> The reclining device 4 rotatably connects the seat back 2 to the seat cushion 1. More specifically, the reclining device 4 has a reclining motor 41 (see Figure 3), and by driving the reclining motor 41, the seat back 2 can be rotated backward or forward relative to the seat cushion 1. The reclining motor 41 corresponds to the electric motor of the present invention. 【0032】 <<Slide Rail Device>> The slide rail device connects the vehicle seat S to the vehicle floor so that it can slide in the longitudinal direction. The slide rail device is installed below the vehicle seat S. The slide rail device has a known structure (a general slide rail mechanism structure). In detail, the slide rail device has a lower rail fixed to the vehicle floor and an upper rail that can slide in the longitudinal direction relative to the lower rail. The slide rail device also has a slide rail lock device that restricts the sliding movement of the upper rail relative to the lower rail. 【0033】<<Lifting Device>> The lifting device connects the vehicle seat S to the vehicle floor so that it can be raised and lowered vertically. More specifically, the lifting device is installed between the seat body and the slide rail device. The lifting device has a lifting motor 51 (see Figure 3), a front height link, and a rear height link. By rotating the lifting motor 51, the front height link and the rear height link are rotated, thereby allowing the seat body to be raised and lowered. The lifting motor 51 corresponds to the electric motor of the present invention. 【0034】 <Overview of the Functional Configuration of the Vehicle Seat S> Next, an overview of the functional configuration of the vehicle seat S will be described. Figure 3 is a diagram showing an overview of the functional configuration of the vehicle seat S. As shown in Figure 3, the vehicle seat S mainly consists of an ECU 6, an operating unit 7, a reclining motor 41, and a lifting motor 51. However, the vehicle seat S is not limited to this and may also have a blower motor that rotates a blower fan. 【0035】 The ECU 6 is an electronic control unit that controls the vehicle seat S and is mounted on the seat cushion frame that forms the skeleton of the seat cushion 1. The ECU 6 mainly consists of a control circuit 61, a heater drive circuit 62, a communication circuit 63, and a power supply circuit 64. The control circuit 61 has a processor, volatile memory, and non-volatile memory, and loads a program stored in the non-volatile memory into the volatile memory for execution. 【0036】 The heater drive circuit 62 drives and controls a heater circuit (not shown) built into the vehicle seat S. The heater drive circuit 62 can acquire operation signals from the occupant to instruct the operation of the heater circuit via the communication circuit 63 and drive and control the heater circuit based on the operation signals. The heater drive circuit 62 may also have a temperature sensor and drive the heater circuit based on a detection signal output by the temperature sensor. 【0037】The communication circuit 63 is a communication device having a wired or wireless communication interface circuit that can communicate with various sensors, various operating switches, and control circuits mounted on the vehicle. The power supply circuit 64 is a constant voltage power supply circuit that converts the electrical energy stored in the vehicle battery +B and supplies electrical energy to the electrical components mounted on the vehicle seat S. 【0038】 The operating unit 7 is equipped with a switch circuit 73 having a reclining switch 71 and a lifting switch 72, as described with reference to Figure 2. An occupant seated in the vehicle seat S can operate the reclining switch 71 and the lifting switch 72 to control the rotation of the seat back 2 and the vertical movement of the seat body. Details of the switch circuit 73 will be described later. The switch circuit 73 corresponds to the operating module of the present invention. 【0039】 Furthermore, the operating unit 7 is equipped with a motor drive circuit 74 that drives and controls the reclining motor 41 and the lifting motor 51. More specifically, the motor drive circuit 74 can control the start, stop, and direction of rotation of the reclining motor 41 and the lifting motor 51 by controlling the drive current supplied to them. The motor drive circuit 74 may also perform PWM drive control to control the rotation speed of the reclining motor 41 and the lifting motor 51. Details of the motor drive circuit 74 will be described later. The motor drive circuit 74 corresponds to the drive control module of the present invention. 【0040】By implementing the motor drive circuit 74 together with the switch circuit 73 in the operating unit 7, it becomes possible to easily assemble the necessary modules for a vehicle seat S equipped with an electric motor that displaces a movable body. Furthermore, a common ECU 6 can be used with vehicle seats S that do not have a motor, thereby reducing the cost of the vehicle seat S. The operating unit 7 is an electrical circuit board on which the motor drive circuit 74 and the switch circuit 73 are implemented, but is not limited to this. The operating unit 7 only needs to be able to be assembled into the vehicle seat S as a single unit (component), and may be a board-type unit in which multiple electrical circuit boards are linked together, or a case-type unit housed in a case or the like. In addition, the operating unit 7 is not limited to being implemented by hardware, but may be a unit that combines hardware and software (program). 【0041】 Furthermore, by configuring the operation unit 7 and the ECU 6 as separate components and concentrating the module configuration related to the drive control of the reclining motor 41 and the lifting motor 51 in the operation unit 7, it becomes possible to miniaturize the ECU 6 and reduce costs. In addition, by controlling the motor drive circuit 74 implemented in the operation unit 7 with the control signal output by the ECU 6, complex control of the reclining motor 41 and the lifting motor 51 becomes possible. As a result, it becomes possible to diversify the functions and performance of the vehicle seat S according to the purpose and application. 【0042】 <Switch Circuit 73 and Motor Drive Circuit 74> Next, the switch circuit 73 and motor drive circuit 74 will be described in more detail with reference to Figure 4. For illustrative purposes, the circuit configuration for driving and controlling the lifting motor 51 is omitted in Figure 4. 【0043】First, the switch circuit 73 will be described. As shown in FIG. 4, the switch circuit 73 includes a reclining switch 71, a lifting switch 72, low-voltage side (ground terminal side) voltage dividing resistors 101, 102, 103, 104, and a reverse current preventing diode 111. The low-voltage side voltage dividing resistors 101, 102, 103, 104 are electrical resistance elements having different resistance values from each other. Therefore, the switch circuit 73 can output operation signals with different voltage levels (corresponding to signal levels) via the first output terminal 73a in response to the pressing operations of the reclining switch 71 and the lifting switch 72. This will be described in more detail below. 【0044】 The reclining switch 71 is connected to a high-voltage side voltage dividing resistor 100, a first low-voltage side voltage dividing resistor l01, and a second low-voltage side voltage dividing resistor 102. When the seated person presses the rearward tilt button 71a of the reclining switch 71, the power supply circuit 64, the high-voltage side voltage dividing resistor 100, the first terminal a, the reverse current preventing diode 111, the first low-voltage side voltage dividing resistor 101, and the ground terminal are electrically connected. Therefore, an operation signal having a first voltage value based on the ratio of the resistance values of the high-voltage side voltage dividing resistor 100 and the first low-voltage side voltage dividing resistor 101 is input to the input terminal 61a of the control circuit 61 with respect to the output voltage of the power supply circuit 64 (for example, 5 volts). On the other hand, when the seated person presses the forward tilt button 71b, the power supply circuit 64, the high-voltage side voltage dividing resistor 100, the second terminal b, the reverse current preventing diode 111, the second low-voltage side voltage dividing resistor 102, and the ground terminal are electrically connected. Therefore, an operation signal having a second voltage value based on the ratio of the resistance values of the high-voltage side voltage dividing resistor 100 and the second low-voltage side voltage dividing resistor 102 is input to the input terminal 61a of the control circuit 61 with respect to the output voltage of the power supply circuit 64. The reclining switch 71 corresponds to the operation switch of the present invention. 【0045】Furthermore, the lift switch 72 is connected to the high-voltage divider resistor 100, the third low-voltage divider resistor 103, and the fourth low-voltage divider resistor 104. When a person sitting down presses the lift button 72a of the lift switch 72, the power supply circuit 64, the high-voltage divider resistor 100, the first terminal a, the reverse current prevention diode 111, the third low-voltage divider resistor 103, and the ground terminal become conductive. As a result, an operation signal having a third voltage value based on the ratio of the resistance values ​​of the high-voltage divider resistor 100 and the third low-voltage divider resistor 103 with respect to the output voltage of the power supply circuit 64 is input to the input terminal 61a of the control circuit 61. On the other hand, when a person sitting down presses the lower button 72b, the power supply circuit 64, the high-voltage divider resistor 100, the second terminal b, the reverse current prevention diode 111, the fourth low-voltage divider resistor 104, and the ground terminal become conductive. Therefore, the input terminal 61a of the control circuit 61 outputs an operation signal having a fourth voltage value based on the ratio of the resistance values ​​of the high-voltage divider resistor 100 and the fourth low-voltage divider resistor 104 with respect to the output voltage of the power supply circuit 64. The lift switch 72 corresponds to the operation switch of the present invention. 【0046】 As described above, when a seated person presses the reclining switch 71a or the forward tilt button 71b, an operation signal having a first voltage value or a second voltage value is output via the first output terminal 73a and input to the input terminal 61a of the control circuit 61. Also, when a seated person presses the lift button 72a or the lower button 72b of the lift switch 72, an operation signal having a third voltage value or a fourth voltage value is output via the first output terminal 73a and input to the input terminal 61a of the control circuit 61. In other words, the switch circuit 73 has a first output terminal 73a that outputs each of the multiple operation signals in an identifiable manner based on the voltage value. The first output terminal 73a corresponds to the common output terminal and the first output unit of the present invention. Furthermore, the first low-voltage side voltage divider resistor 101, the second low-voltage side voltage divider resistor 102, the third low-voltage side voltage divider resistor 103, and the fourth low-voltage side voltage divider resistor 104 correspond to the identification information assigning unit and voltage divider resistors of the present invention. 【0047】Further, the switch circuit 73 has a second output terminal 73b different from the first output terminal 73a. As will be described later, the second output terminal 73b can be connected to the first control input terminal 75a and the second control input terminal 76a of the motor drive circuit 74, and corresponds to the individual output terminal and the second output portion of the present invention. Details of the second output terminal 73b will be described later. 【0048】 Next, the motor drive circuit 74, which is a relay drive type drive circuit, will be described. As shown in FIG. 4, the motor drive circuit 74 includes a first relay 75, a second relay 76, a first freewheeling diode 204, and a second freewheeling diode 214. The first relay 75 and the second relay 76 correspond to the drive circuit of the present invention. 【0049】 The first relay 75 includes a first excitation coil 201, a first switch 202 operated by the first excitation coil 201, and a first back electromotive force prevention diode 203. The first control input terminal 75a of the first relay 75 is connected to the first control output terminal 61b of the control circuit 61, and a control signal output by the control circuit 61 is input thereto. The second relay 76 includes a second excitation coil 211, a second switch 212 operated by the second excitation coil 211, and a second back electromotive force prevention diode 213. The second control input terminal 76a of the second relay 76 is connected to the second control output terminal 61c of the control circuit 61, and a control signal output by the control circuit 61 is input thereto. The first control input terminal 75a and the second control input terminal 76a correspond to the input portion of the present invention. 【0050】 The reclining motor 41 is interposed between the first switch 202 and the second switch 212 and connects the first switch 202 and the second switch 212. Therefore, by switching the connection state of the first switch 202 and the second switch 212, the flow path of the drive current supplied from the in-vehicle battery +B changes, and thereby the rotation direction of the reclining motor 41 is reversed. This will be described in detail below. 【0051】First, when a seated person presses the reclining switch 71's reclining button 71a, the control circuit 61 outputs control signals from the first control output terminal 61b and the second control output terminal 61c based on the first voltage value of the operation signal input via the input terminal 61a. The first control output terminal 61b is connected to the first excitation coil 201 of the first relay 75 and controls the excitation current flowing through the first excitation coil 201. This causes the first terminal a of the first switch 202 to conduct. On the other hand, the second control output terminal 61c is connected to the second excitation coil 211 of the second relay 76 and controls the excitation current flowing through the second excitation coil 211. This causes the second terminal b of the second switch 212 to conduct. At this time, the motor drive current Ib1 supplied from the vehicle battery +B flows in the following order: first terminal a of the first switch 202, reclining motor 41, second terminal b of the second switch 212, and ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 is tilted backward. 【0052】 On the other hand, when a seated person presses the forward tilt button 71b of the reclining switch 71, the control circuit 61 outputs a control signal based on the second voltage value of the operation signal input via the input terminal 61a. The control signal causes the second terminal b of the first switch 202 to conduct, and the first terminal a of the second switch 212 to conduct. At this time, the motor drive current Ib2 supplied from the onboard battery +B flows in the following order: first terminal a of the second switch 212, reclining motor 41, second terminal b of the first switch 202, and ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 tilts forward. 【0053】 As described above, when a seated person operates the reclining switch 71's reclining button 71a and forward tilt button 71b, control signals for driving the reclining motor 41 are input from the control circuit 61 to the first relay 75 and the second relay 76. As a result, the reclining motor 41 displaces the seat back 2 relative to the seat cushion 1 so that it is tilted backward or forward. 【0054】The first back EMF prevention diode 203 is connected in parallel with the first excitation coil 201 and plays a role in protecting the motor drive circuit 74 by suppressing the generation of back EMF when the first switch 202 is operated. Similarly, the second back EMF prevention diode 213 is connected in parallel with the second excitation coil 211 and plays a role in protecting the control circuit 61 by suppressing the generation of back EMF when the second switch 212 is operated. In addition, the first freewheeling diode 204 and the second freewheeling diode 214 are connected in parallel with the reclining motor 41 and play a role in protecting the control circuit 61 by suppressing the generation of back EMF when the rotation of the reclining motor 41 is started or stopped. 【0055】 In Figure 4, the switch circuit 73 and the motor drive circuit 74 are connected via the ECU 6, but this is not limited to them. The switch circuit 73 and the motor drive circuit 74 may be directly connected to each other without going through the ECU 6. 【0056】 <First Modification> Next, a first modification in which the switch circuit 73 and the motor drive circuit 74 are directly connected to each other will be described with reference to Figure 5. Note that, for illustrative purposes, the circuit configuration for driving and controlling the reclining motor 41 is omitted in Figure 5. 【0057】 In Figure 5, the first output terminal 73a of the switch circuit 73 and the first control input terminal 75a and second control input terminal 76a of the motor drive circuit 74 are not connected to the ECU 6. Instead, the second output terminal 73b of the switch circuit 73 is connected to the first control input terminal 75a and second control input terminal 76a of the motor drive circuit 74. More specifically, the first terminal a and second terminal b of the reclining switch 71 and the lifting switch 72 are individually connected to the first control input terminal 75a of the first relay 75 and the second control input terminal 76a of the second relay 76, respectively. Even when the switch circuit 73 and the motor drive circuit 74 are connected in this way, the reclining motor 41 can be rotated by the seated person's operation, allowing the seat back 2 to be tilted backward or forward, similar to the embodiment described above. 【0058】Furthermore, as described above, the switch circuit 73 has a reverse current prevention diode 111 connected in series with each of the first low-voltage divider resistor 101, the second low-voltage divider resistor 102, the third low-voltage divider resistor 103, and the fourth low-voltage divider resistor 104. Therefore, when the switch circuit 73 and the motor drive circuit 74 are connected without going through the ECU 6, it is possible to prevent the current that has passed through the low-voltage divider resistors 101, 102, 103, and 104 from flowing into the other low-voltage divider resistors. This makes it possible to effectively suppress erroneous operation of the reclining motor 41 and the lifting motor 51. 【0059】 As described above, the switch circuit 73 and the motor drive circuit 74 are connected via the ECU 6, and the reclining motor 41 and the lifting motor 51 can be driven and controlled by the control signals output by the ECU 6. Alternatively, the switch circuit 73 and the motor drive circuit 74 can be directly connected to each other without going through the ECU 6, and the reclining motor 41 and the lifting motor 51 can be driven and controlled by the operation signals output by the switch circuit 73. In other words, the operation unit 7 can be made common regardless of the connection between the switch circuit 73 and the motor drive circuit 74, thereby making it possible to reduce the cost of the vehicle seat S. Furthermore, since the operation unit 7 is configured separately from the ECU 6, it is possible to miniaturize the ECU 6. 【0060】 <Method of manufacturing a vehicle seat S> Next, the method of manufacturing a vehicle seat S will be described. First, the seat cushion 1, seat back 2, and headrest 3 that constitute the seat body, along with a slide rail device and a lifting device, are prepared. 【0061】 Next, a switch circuit 73 and a motor drive circuit 74 are mounted on the operating unit 7. The switch circuit 73 includes a reclining switch 71 that receives input to instruct the rotation of the seat back 2, and a lifting switch 72 that receives input to instruct the raising and lowering of the seat body. The motor drive circuit 74 mainly consists of a first relay 75 and a second relay 76 that drive and control the reclining motor 41 and the lifting motor 51. 【0062】 Next, the ECU 6 and the operating unit 7 are assembled to the seat cushion 1. Specifically, the ECU 6 is attached to the seat cushion frame of the seat cushion 1, and the operating unit 7 is attached to the ridge portion 1b. At this time, the switch circuit 73 and the motor drive circuit 74 can be connected to each other via the ECU 6. Alternatively, the switch circuit 73 and the motor drive circuit 74 may be connected to each other directly without going through the ECU 6. 【0063】 Next, the seat back 2 is connected to the seat cushion 1 via a reclining device 4. More specifically, the seat back 2 is rotatably connected to the seat cushion 1 by a reclining device 4 having a reclining motor 41. The seat body, to which the headrest 3 is attached to the seat back 2, is movably connected to a slide rail device via a lifting device having a lifting motor 51. This completes the manufacturing of the vehicle seat S. 【0064】 The above-described embodiment of a vehicle seat S according to one embodiment of the present invention is merely an example to facilitate understanding of the present invention and does not limit it. In other words, the present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included in the present invention. 【0065】 <Second Modification> In the above-described embodiment, the motor drive circuit 74 was described as having a first relay 75 and a second relay 76, but the motor drive circuit 74 may further have a PWM drive control circuit 77A. Figures 6 and 7 show the circuit configuration of the switch circuit 73 and the motor drive circuit 74A according to the second modification. More specifically, Figure 6 shows the switch circuit 73 and the motor drive circuit 74A connected via the ECU 6. On the other hand, Figure 17 shows the switch circuit 73 and the motor drive circuit 74A directly connected to each other without going through the ECU 6. 【0066】As shown in Figures 6 and 7, the PWM control input terminal 77a of the motor drive circuit 74A is connected to the third control output terminal 61d of the control circuit 61, and receives the PWM control signal output by the control circuit 61. The PWM drive control circuit 77A is also connected to the low-voltage side (ground terminal side) of the reclining motor 41. More specifically, the PWM drive control circuit 77A mainly consists of an N-channel MOSFET 221. The gate terminal, which corresponds to the control terminal of the MOSFET 221, is connected to the third control output terminal 61d of the control circuit 61, and the PWM control signal is input thereto. The drain terminal of the MOSFET 221 is connected in series with the low-voltage side of the reclining motor 41, and the source terminal is connected to the ground terminal. Therefore, the reclining motor 41 is rotated at a speed corresponding to the on / off cycle of the PWM control signal output by the control circuit 61, and as a result, the rotational speed of the reclining motor 41 is controlled by the control circuit 61. The control circuit 61 may control the rotation speed of the reclining motor 41 to a predetermined rotation speed, or it may control the rotation speed of the reclining motor 41 to vary depending on the vehicle's driving conditions. 【0067】 A bypass wire 78A is provided between the reclining motor 41 and the PWM drive control circuit 77A. As shown in Figure 7, the bypass wire 78A connects the drain terminal of the MOSFET 221 to the ground terminal so as to bypass the PWM drive control circuit 77A when the motor drive circuit 74A is not connected to the ECU 6. Therefore, the motor drive circuit 74A can be made common whether the reclining motor 41 is PWM controlled by the PWM control signal output by the ECU 6 or not, thereby making it possible to reduce the cost of the vehicle seat S. The bypass wire 78A corresponds to the bypass connection part. 【0068】<Third Modification> In the above-described embodiment, the drive control of the reclining motor 41 and the lifting motor 51 was explained as being performed by separate motor drive circuits 74, but this is not limited to this. The drive control of the reclining motor 41 and the lifting motor 51 may be performed by a single motor drive circuit 74. Figure 8 shows a motor drive circuit 74B according to the third modification. As shown in Figure 8, the motor drive circuit 74B is described as driving and controlling the reclining motor 41 that rotates the seat back 2, the lifting motor 51 that raises and lowers the seat body, and the slide motor 91 that moves the seat body back and forth. Note that in Figure 8, the first back EMF prevention diode 203, the first freewheeling diode 204, the second back EMF prevention diode 213, and the second freewheeling diode 214 are omitted. The slide motor 91 corresponds to the operation switch of the present invention. 【0069】 The first control input terminal 75a of the first relay 75 is connected to the first control output terminal 61b of the control circuit 61, and the control signal output by the control circuit 61 is input to it. Similarly, the second control input terminal 76a of the second relay 76 is connected to the second control output terminal 61c of the control circuit 61, and the control signal output by the control circuit 61 is input to it. In addition, a reclining drive switch 41a is connected in parallel with the reclining motor 41 that rotates the seat back 2. Similarly, a lifting drive switch 51a is connected in parallel with the lifting motor 51 that raises and lowers the seat body. In addition, a slide drive switch 91a is connected in parallel with the slide motor 91 that slides the seat body back and forth. The reclining drive switch 41a, the lifting drive switch 51a, and the slide drive switch 91a are relay switches, but are not limited to them. Of course, the reclining drive switch 41a, the lifting drive switch 51a, and the slide drive switch 91a may be semiconductor switches or mechanical switches. 【0070】The reclining motor 41, the lifting motor 51, and the slide motor 91 are interposed between the first switch 202 and the second switch 212, connecting the first switch 202 and the second switch 212. Therefore, when the connection state of the first switch 202 and the second switch 212 is switched, the flow path of the drive current changes, which reverses the rotation direction of the reclining motor 41, the lifting motor 51, and the slide motor 91. This will be explained in detail below. 【0071】 First, when the seated person presses the reclining switch 71's backward tilt button 71a, the reclining drive switch 41a is opened, while the lifting drive switch 51a and the slide drive switch 91a become conductive. This creates a bypass path for the lifting motor 51 and the slide motor 91. Next, a control signal output by the control circuit 61 causes the first terminal a of the first switch 202 and the second terminal b of the second switch 212 to become conductive. At this time, the motor drive current Ib1 supplied from the vehicle battery +B flows in the following order: first terminal a of the first switch 202, reclining motor 41, lifting drive switch 51a, slide drive switch 91a, second terminal b of the second switch 212, and ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 tilts backward. 【0072】 On the other hand, when a seated person presses the forward tilt button 71b of the reclining switch 71, the reclining drive switch 41a is opened, and the lifting drive switch 51a and the slide drive switch 91a remain conductive. Next, the control signal output by the control circuit 61 causes the second terminal b of the first switch 202 and the first terminal a of the second switch 212 to become conductive. At this time, the motor drive current Ib2 supplied from the vehicle battery +B flows in the following order: first terminal a of the second switch 212, slide drive switch 91a, lifting drive switch 51a, reclining motor 41, second terminal b of the first switch 202, and ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 tilts forward. 【0073】As described above, when a seated person operates the reclining switch 71, the reclining drive switch 41a, which is the target of drive control, is opened, and the other lifting drive switches 51a and slide drive switches 91a are made conductive. This makes it possible to select and control the motor to be driven, eliminating the need to provide a motor drive circuit 74 for each of the multiple motors, and thus reducing the number of parts in the vehicle seat S. 【0074】 <Fourth Modification> In the embodiments described above, the motor drive circuit 74 was described as a relay-driven drive circuit, but it is not limited to this. The motor drive circuit 74 may also be an H-bridge type drive circuit. Figure 9 shows a motor drive circuit 74C according to the fourth modification. As shown in Figure 9, the motor drive circuit 74C has four circuit switching MOSFETs (first MOSFET 80, second MOSFET 81, third MOSFET 82, and fourth MOSFET 83). The first MOSFET 80, second MOSFET 81, third MOSFET 82, and fourth MOSFET 83 correspond to the drive circuit of the present invention. 【0075】 More specifically, of the four circuit switching MOSFETs 80, 81, 82, and 83, the first MOSFET 80 and the third MOSFET 82, which are connected to the high-voltage side, are P-channel power MOSFETs. The source terminals of the first MOSFET 80 and the third MOSFET 82 are connected to each other. In addition, the drain terminal of the first MOSFET 80 is connected to one terminal of the reclining motor 41, and the drain terminal of the third MOSFET 82 is connected to the other terminal of the reclining motor 41. 【0076】 Furthermore, the gate terminals of the first MOSFET 80 and the third MOSFET 82 are connected to the control output terminal of the control circuit 61 via the first control input terminal 80a and the third control input terminal 82a. Therefore, the first MOSFET 80 and the third MOSFET 82 can be individually switched on and off based on the control signals output by the control circuit 61. 【0077】On the other hand, of the four circuit switching MOSFETs 80, 81, 82, and 83, the second MOSFET 81 and the fourth MOSFET 83, which are connected to the low-voltage side, consist of N-channel power MOSFETs. The source terminals of the second MOSFET 81 and the fourth MOSFET 83 are connected to each other. The drain terminal of the second MOSFET 81 is connected to the terminal of the reclining motor 41 to which the drain terminal of the first MOSFET 80 is connected. The drain terminal of the fourth MOSFET 83 is connected to the terminal of the reclining motor 41 to which the drain terminal of the third MOSFET 82 is connected. 【0078】 Furthermore, the gate terminals of the second MOSFET 81 and the fourth MOSFET 83 are connected to the control output terminals of the control circuit 61 via the second control input terminals 81a and 83a, respectively. Therefore, the second MOSFET 81 and the fourth MOSFET 83 can be individually switched on and off based on the control signals output by the control circuit 61. The first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a correspond to the input section of the present invention. 【0079】 First, when the seated person presses the reclining switch 71's reclining button 71a, the control circuit 61 outputs control signals to the first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a. This causes the drain and source terminals of the first MOSFET 80 and the fourth MOSFET 83 to conduct. At this time, the motor drive current Ib1 supplied from the vehicle battery +B flows in the order of the first MOSFET 80, the reclining motor 41, the fourth MOSFET 83, and the ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 is tilted backward. 【0080】On the other hand, when a seated person presses the forward tilt button 71b of the reclining switch 71, the control circuit 61 outputs control signals to the first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a. As a result, the drain terminal and source terminal of the second MOSFET 81 and the third MOSFET 82 become conductive. At this time, the motor drive current Ib2 supplied from the vehicle battery +B flows in the order of the second MOSFET 81, the reclining motor 41, the third MOSFET 82, and the ground terminal. Therefore, the reclining motor 41 rotates so that the seat back 2 tilts forward. 【0081】 As described above, when a seated person operates the reclining switch 71, control signals are input from the control circuit 61 to the first MOSFET 80, the second MOSFET 81, the third MOSFET 82, and the fourth MOSFET 83. As a result, the reclining motor 41 rotates to tilt the seat back 2 backward or forward. 【0082】 <Fifth Modification> The four circuit switching MOSFETs 80, 81, 82, and 83 may also drive and control multiple motors. Figure 10 shows a motor drive circuit 74D according to the fifth modification. The motor drive circuit 74D has a reclining motor 41, a lifting motor 51, and a slide motor 91 connected in series with each other. A reclining drive switch 41a is connected in parallel with the reclining motor 41. Similarly, a lifting drive switch 51a is connected in parallel with the lifting motor 51. A slide drive switch 91a is also connected in parallel with the slide motor 91. 【0083】First, when the seated person presses the reclining switch 71's reclining button 71a, the reclining drive switch 41a is opened, and the lifting drive switch 51a and the slide drive switch 91a become conductive. This creates a bypass path for the lifting motor 51 and the slide motor 91. Next, the control signal output by the control circuit 61 is input to the first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a. This causes the drain terminal and source terminal of the first MOSFET 80 and the fourth MOSFET 83 to become conductive. At this time, the motor drive current Ib1 supplied from the vehicle battery +B flows in the following order: first MOSFET 80, reclining motor 41, lifting drive switch 51a, slide drive switch 91a, fourth MOSFET 83, and ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 tilts backward. 【0084】 On the other hand, when a seated person presses the forward tilt button 71b of the reclining switch 71, the reclining drive switch 41a is released, and the lifting drive switch 51a and the slide drive switch 91a remain conductive. Next, the drive control signal output by the control circuit 61 is input to the first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a. As a result, the drain terminal and source terminal of the second MOSFET 81 and the third MOSFET 82 become conductive. At this time, the motor drive current Ib2 supplied from the vehicle battery +B flows in the following order: second MOSFET 81, slide drive switch 91a, lifting drive switch 51a, reclining motor 41, third MOSFET 82, and ground terminal. Therefore, the reclining motor 41 rotates so that the seat back 2 tilts forward. 【0085】Furthermore, as shown in Figure 11, the motor drive circuit 74E may have a reclining motor 41, a lifting motor 51, and a slide motor 91 connected in parallel to each other. A reclining drive switch 41a is connected in series with the reclining motor 41. Similarly, a lifting drive switch 51a is connected in series with the lifting motor 51. Also, a slide drive switch 91a is connected in series with the slide motor 91. 【0086】 First, when the seated person presses the reclining switch 71's reclining button 71a, the reclining drive switch 41a becomes conductive, and the lifting drive switch 51a and the slide drive switch 91a are opened. This opens the connection paths for the lifting motor 51 and the slide motor 91. Next, the control signal output by the control circuit 61 is input to the first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a. This causes the drain and source terminals of the first MOSFET 80 and the fourth MOSFET 83 to become conductive. At this time, the motor drive current Ib1 supplied from the vehicle battery +B flows in the order of the first MOSFET 80, the reclining motor 41, the fourth MOSFET 83, and the ground terminal. As a result, the reclining motor 41 rotates so that the seat back 2 tilts backward. 【0087】 On the other hand, when a seated person presses the forward tilt button 71b of the reclining switch 71, the reclining drive switch 41a becomes conductive, and the lifting drive switch 51a and the slide drive switch 91a remain open. Next, the control signal output by the control circuit 61 is input to the first control input terminal 80a, the second control input terminal 81a, the third control input terminal 82a, and the fourth control input terminal 83a. As a result, the drain terminal and source terminal of the second MOSFET 81 and the third MOSFET 82 become conductive. At this time, the motor drive current Ib2 supplied from the vehicle battery +B flows in the order of second MOSFET 81, reclining motor 41, third MOSFET 82, and ground terminal. Therefore, the reclining motor 41 rotates so that the seat back 2 tilts forward. 【0088】 As described above, the reclining drive switch 41a, the lifting drive switch 51a, or the slide drive switch 91a are controlled by the seated person. This allows for the selection and control of the motor to be driven, eliminating the need to provide a motor drive circuit 74 for each of the multiple motors, and thus reducing the number of parts in the vehicle seat S. 【0089】 In the embodiments described above, the operation unit 7 was described as being provided on the ridge portion 1b of the seat cushion 1, but it is not limited to this. The operation unit 7 may be provided on an armrest that is easily operated by the seated person. Alternatively, the operation unit 7 may be provided on the vehicle. Specifically, the operation unit 7 may be provided on the vehicle door lining, particularly the door armrest. In this case, the motor drive circuit 74 implemented on the operation unit 7 only needs to be connected via a connecting cable to the reclining motor 41 provided on the reclining device 4 and the lifting motor 51 of the lifting device. Alternatively, the motor drive circuit 74 may be communicated with the reclining motor 41 and the lifting motor 51 via a wireless communication line. Even in such cases, as in the embodiments described above, since the motor drive circuit 74 is implemented on the operation unit 7, the motor drive circuit 74 and the switch circuit 73 can be easily assembled, which is an advantage. The vehicle seat S and the operation unit 7 provided on the door armrest correspond to the vehicle seat device of the present invention. 【0090】Furthermore, in the embodiments described above, the switch circuit 73 implemented in the operation unit 7 was described as being operated to instruct the raising and lowering of the seat back 2 or the seat body of the vehicle seat S, but it is not limited to this. The operation unit 7 may also be operated to instruct the opening and closing of the vehicle's power window. In this case, the operation unit 7 may be provided on the door armrest, and the opening and closing motor for opening and closing the power window may be built into the vehicle door. Even in such a case, as in the embodiments described above, the motor drive circuit 74 is implemented in the operation unit 7, so the motor drive circuit 74 and the switch circuit 73 can be easily assembled, which is an advantage. The vehicle seat S, the opening and closing motor, and the operation unit 7 correspond to the vehicle interior device of the present invention. 【0091】 Furthermore, in the embodiments described above, the seat back 2 that rotates relative to the seat cushion 1 and the seat body that moves in the vertical or horizontal direction were described as specific examples of movable parts, but of course, the invention is not limited to these. The movable parts may be air cells built into the seat body, or lumbar support, ottoman, footrest, shoulder rest, headrest, or neck rest that can be displaced to suit the occupant's body shape. The seat body may also rotate around a rotation axis that extends in the vertical direction. 【0092】 Furthermore, although the above-described embodiment explained that the operation unit 7 has a switch circuit 73 on which push-button type switches (reclining switch 71 and lifting switch 72) are implemented, it is not limited to this. The operation unit 7 may also have a touch panel type switch module implemented by hardware (processor) and software (program). 【0093】 Furthermore, although the above-described embodiment used a rotational motor as an example of an electric motor that displaces the movable body, the electric motor is not limited to a motor. Of course, the electric motor may also be a reciprocating electric actuator or an electric plunger. 【0094】Furthermore, in the above-described embodiment, it was explained that the resistance values ​​of the multiple low-voltage voltage divider resistors 101, 102, 103, and 104 provided on the low-voltage side of the voltage divider resistors provided in the switch circuit 73 are different from each other, but this is not limited to this. Multiple voltage divider resistors may be provided on the high-voltage side, and their resistance values ​​may be made different from each other so that the voltage levels of the operation signals output from the switch circuit 73 are different from each other. 【0095】 Furthermore, in the embodiments described above, the first control output terminal 61b and the second control output terminal 61c of the control circuit 61 were described as being connected to the first control input terminal 75a and the second control input terminal 76a of the motor drive circuit 74 by separate signal lines, but this is not limited to this. A serial communication circuit may be provided in the ECU 6 and the motor drive circuit 74, and the control circuit 61 and the motor drive circuit 74 may be connected by a common signal line. This makes it possible to reduce the number of signal lines between the ECU 6 and the motor drive circuit 74. 【0096】 Furthermore, although the above-described embodiment explained that the PWM drive control circuit 77A mainly consists of an N-channel MOSFET, it is not limited to this. The PWM drive control circuit 77A may also mainly consist of a P-channel MOSFET, or it may have semiconductor switches other than MOSFETs. 【0097】 Furthermore, in the embodiments described above, a vehicle seat S mounted on a vehicle was given as an example of a vehicle seat, and its configuration example was explained. However, the present invention is not limited to seats mounted on ground vehicles with wheels, such as automobiles and railways, but can also be applied to seats mounted on aircraft, ships, and other vehicles that move on surfaces other than the ground. 【0098】S Vehicle seat (seat for vehicles) P Pad material Tr Upholstery material 1 Seat cushion 1a Seating area 1b Backrest area 2 Seat back (movable part) 2a Backrest area 2b Backrest area 3 Headrest 4 Reclining device (movable part) 41 Reclining motor (electric motor) 41a Reclining drive switch 51 Lifting motor (electric motor) 51a Lifting drive switch 6 ECU (Electronic Control Unit) 61 Control circuit 61a Input terminal 61b First control output terminal 61c Second control output terminal 61d Third control output terminal 62 Heater drive circuit 63 Communication circuit 64 Power supply circuit 7 Operation unit 71 Reclining switch (operation switch) 71a Reclining button 71b Forward tilt button 72 Lifting switch (operation switch) 72a Up button 72b Down button 73 Switch circuit (operation module) 73a First output terminal (first output section, common output terminal) 73b Second output terminal (second output section, individual output terminal) 74, 74A, 74B, 74C, 74D, 74E Motor drive circuit (drive control module) 75 First relay (drive circuit) 75a First control input terminal (input section) 76 Second relay (drive circuit) 76a Second control input terminal (input section) 77A PWM drive control circuit 77a PWM control input terminal 78A Bypass wire (bypass connection section) 80 First MOSFET (drive circuit) 80a First control input terminal (input section) 81 Second MOSFET (drive circuit) 81a Second control input terminal (input section) 82 Third MOSFET (drive circuit) 82a Third control input terminal (input section) 83 Fourth MOSFET (drive circuit) 83a Fourth control input terminal (input section) 91 Slide motor (electric motor) 91a Slide drive switch 100 High-voltage side voltage divider resistor (voltage divider resistor) 101 First low-voltage side voltage divider resistor (voltage divider resistor) 102 Second low-voltage side voltage divider resistor (voltage divider resistor) 103 Third low-voltage side voltage divider resistor (voltage divider resistor) 104 Fourth low-voltage side voltage divider resistor (voltage divider resistor) 111 Reverse current prevention diode 201 First excitation coil 202 First switch 203 First back EMF prevention diode 204 First freewheeling diode 211 Second excitation coil 212 Second switch 213 Second back EMF prevention diode214 Second freewheeling diode 221 MOSFET Ib1, Ib2 Motor drive current +B Vehicle battery

Claims

1. A vehicle seat comprising a movable body and an electric motor for displacing the movable body, wherein the vehicle seat further comprises a drive control module for driving and controlling the electric motor, and an operation unit on which an operation module for receiving operations for instructing the movement of the movable body is mounted, the drive control module being mounted on the operation unit.

2. The vehicle seat according to claim 1, comprising an electronic control unit configured separately from the operating unit, wherein the drive control module has an input section that can be connected to either the electronic control unit or the operating module, and when the input section is connected to the electronic control unit, it drives and controls the motor based on a control signal output by the electronic control unit, and when the input section is connected to the operating module, it drives and controls the motor based on an operating signal output by the operating module.

3. The vehicle seat according to claim 2, comprising a plurality of movable bodies and a plurality of electric motors for displacing each of the plurality of movable bodies, wherein the operation module comprises a plurality of operation switches for receiving operations to instruct the operation of each of the plurality of movable bodies, an identification information assigning unit for enabling the electronic control unit to identify the plurality of operation signals output in response to operations on the plurality of operation switches, a first output unit connectable to the electronic control unit, and a second output unit connectable to the input unit of the drive control module.

4. The vehicle seat according to claim 3, wherein the drive control module has a plurality of drive circuits for driving and controlling each of the plurality of electric motors, and the second output unit outputs a plurality of operation signals output by the plurality of operation switches to a plurality of drive circuits corresponding to each of the plurality of operation switches.

5. The vehicle seat according to claim 2, comprising a plurality of movable bodies and a plurality of electric motors for displacing each of the plurality of movable bodies, wherein the operating module comprises a plurality of operating switches for receiving operations to instruct the operation of each of the plurality of movable bodies, a plurality of voltage divider resistors connected to each of the plurality of operating switches and having mutually different resistance values, a common output terminal connectable to the electronic control unit and outputting each of the plurality of operating signals in an identifiable manner based on the signal level, and a plurality of individual output terminals connectable to the input section of the drive control module and outputting the plurality of operating signals individually.

6. The vehicle seat according to claim 5, characterized in that the operating module has a reverse current prevention diode connected in series with each of the plurality of voltage divider resistors.

7. The vehicle seat according to claim 2, characterized in that the drive control module includes a PWM drive control circuit that, when the input unit is connected to the electronic control unit, drives the electric motor in a PWM manner based on a PWM control signal output by the electronic control unit, and a bypass connection unit that, when the input unit is connected to the operation module, bypasses the PWM drive control circuit.

8. The vehicle seat according to claim 2, wherein the drive control module has a PWM drive control circuit that, when the input unit is connected to the electronic control unit, drives the motor in a PWM manner based on a PWM control signal output by the electronic control unit, the PWM drive control circuit has a semiconductor switch, the control terminal of the semiconductor switch is input to the PWM control signal output by the electronic control unit, the semiconductor switch is connected in series with the motor when the input unit is connected to the electronic control unit, and the semiconductor switch is bypassed when the input unit is connected to the operation module.

9. A vehicle seat device to be mounted on a vehicle, comprising: a vehicle seat equipped with a movable body and an electric motor for displacing the movable body; and an operating unit on which an operating module for receiving operations for instructing the movement of the movable body is mounted, wherein a drive control module for driving and controlling the electric motor is mounted on the operating unit.

10. An interior vehicle device to be mounted on a vehicle, comprising: a vehicle seat; a movable body provided on the vehicle and an electric motor for displacing the movable body; and an operating unit on which an operating module for receiving operations to instruct the movement of the movable body is mounted, wherein a drive control module for driving and controlling the electric motor is mounted on the operating unit.

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