JP2012065751A - Vehicular power seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular power seat device allowing solution of a problem of battery consumption of a mobile machine in an switch operation when driving a seat and a problem of a switch long-time pressing operation of the mobile machine.SOLUTION: A vehicle BD is provided with an operation unit 70 (an operation means) having a bringing-out SW 71 and a storage SW 72 (an operation switch) in each of which an on state is held by a single switch operation, for previously instructing a drive mode of the seat 10. The mobile machine 60 is incorporated with a transponder 61 driven by a magnetic field generated by a transpoder transmitter/receiver 40, and wirelessly transmitting an ID code. The transponder transmitter/receiver 40 (a receiver) transmits the ID code from the mobile machine 60 to a collation ECU (Electronic Control Unit) 30 (a collation means). A seat ECU 20 (a seat control means) inputs a control signal from the collation ECU 30, and drives the seat 10 when an on signal of the SW is input from the operation unit 70.

Description

  The present invention relates to a vehicle power seat device, for example, a vehicle power seat device suitable for a welfare vehicle.

  As a vehicle power seat device, a remote transmitter (portable device) that transmits a command signal, a signal receiver (receiver) that receives a command signal from the remote transmitter, and a command signal received by the signal receiver A control processing device (seat control means) for driving a prime mover for operating a seat installed in a passenger compartment is known (for example, see Patent Document 1 below). The power seat device for a vehicle described in Patent Document 1 is configured such that a seat back of a seat is expanded to a folded position or an upright position by a remote operation from a remote transmitter.

Special table 2005-508270 gazette

By the way, there is also known a vehicle in which the above-described power seat device for a vehicle is applied to a welfare vehicle so that the seat is operated so as to facilitate getting on and off of the occupant (so-called auto access seat control). However, in this type of vehicle, when a remote operation is performed using a remote transmitter to operate the seat, it is necessary to hold the switch button of the remote transmitter for a long time (for example, about 30 seconds). It was. The reason for requesting the long-press operation of the switch button of the remote transmitter in this way is that the driving of the seat can be stopped at any time by releasing the switch button of the remote transmitter. It is necessary to take into account the safety aspect when the passenger gets on and off the vehicle by driving the seat only when the radio wave from the remote transmitter is continuously received by the receiver on the vehicle side. Because there is.
As described above, since it is necessary to press and hold the switch button of the remote transmitter in order to drive the seat, there is a problem that battery consumption in the remote transmitter is large. In addition, there is a problem that the long press operation of the switch button of the remote transmitter is painful.

  The present invention has been made to cope with the above-described problem, and its purpose is to perform a long press operation of a switch of a portable device while solving a problem of battery consumption on the portable device side when the switch is operated when driving a seat. An object of the present invention is to provide a power seat device for a vehicle that can solve the above problem.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, the present invention provides a portable device capable of wirelessly transmitting an ID code, a receiver mounted on a vehicle and capable of wirelessly receiving an ID code transmitted by the portable device, and an ID code from the portable device. Collating means for collating with a pre-registered vehicle-specific master code, and sheet control means for driving a seat installed in the vehicle to a predetermined position on condition that the ID code is accepted and authenticated by the collating means A vehicle power seat device comprising:
The vehicle has an operation switch that is kept on by a single switch operation, and is provided with operation means for instructing the seat driving mode in advance. The portable device is generated outside the portable device. The transponder is configured to include a transmission circuit unit that is driven by the generated magnetic field and wirelessly transmits the ID code. The receiver includes a magnetic field generation circuit unit that generates a magnetic field toward the outside of the receiver, And a receiving circuit unit that wirelessly receives the ID code from the machine, and transmits the received ID code to the collating unit wirelessly or by wire. The sheet control unit accepts and authenticates the ID code by the collating unit. And when the sheet drive mode is instructed in advance by turning on the operation switch of the operation means, the sheet is driven according to the drive mode. In this case, the seat control means, for example, by driving the operation switch of the operation means to drive the seat from the retracted position inside the vehicle toward the swinging position outside the vehicle so that the occupant can easily get on and off the seat, or It is preferable that the sheet is configured to be driven from the swinging position toward the storage position.

  In the power seat device for a vehicle of the present invention, the driving mode of the seat is instructed in advance by turning on the operation switch of the operation means. After that, when the portable device is brought close to the receiver, an induced current is generated in the transponder of the portable device due to the magnetic field generated in the high frequency generation circuit portion of the receiver, and this is used as a power source from the transmitting circuit portion of the portable device to the receiving circuit of the receiver. The ID code is wirelessly transmitted toward the part. When the ID code is accepted and verified by the collating means, the sheet is driven in the driving mode instructed in advance by the operation switch of the operating means. With such a configuration, since the portable device is driven by the magnetic field generated by the receiver, it is not necessary to incorporate a battery for driving the portable device, and when the switch for driving the seat is operated, The problem of large battery consumption can be solved. In addition, since the operation switch of the operation means is kept on by a single switch operation, it is not necessary to press and hold the operation switch for a long time, and by moving the portable device away from the receiver (the ID code from the portable device is It is possible to stop driving the seat (by setting the receiver not to receive wirelessly). For this reason, the problem of the long press operation of the switch in the portable device can be solved while ensuring safety.

  In this case, the seat control means continues to drive the seat for at least the set time after the ID code is received and authenticated by the collating means based on the wireless reception of the ID code from the portable device by the receiver. If the ID code acceptance authentication is again performed by the collating means, the sheet drive is further extended for the set time, while if the ID code acceptance authentication is not performed again by the collating means within the set time, It is preferable that the driving of the sheet is stopped after the set time has elapsed.

  Due to the characteristics of the transponder (a drive current is generated by charging and discharging by electromagnetic induction), the receiver cannot continuously receive a signal including an ID code from the portable device. Therefore, when the ID code is accepted and verified by the verification unit, the sheet is driven at least for the set time, and when the ID code is received and verified again by the verification unit within the set time, the set time is further increased. Only by extending the driving of the sheet, the sheet can be continuously operated almost certainly. On the other hand, if the ID code acceptance authentication is not performed again by the collating means within the set time, the safety of the seat can be secured satisfactorily by stopping the driving of the seat after the set time has elapsed.

  In addition, the receiver and the operation switch are preferably arranged close to each other. According to this, since the operation of turning on the operation switch and the operation of moving the portable device closer to or away from the receiver can be performed continuously, the operability of the device is improved while considering safety. Can do.

  The engine starter of the vehicle incorporates an engine start receiver having the same transmission / reception function as the receiver separately from the seat operation receiver, and is received by the engine start receiver. Based on the ID code from the portable device, the portable device is used for driving the seat and for starting the engine so that the engine start of the vehicle is permitted on the condition that the ID code from the portable device is accepted and verified by the verification means. It is good to be able to be used for both.

  Conventionally, in order to prevent theft of the vehicle, the immobility control unit on the vehicle side authenticates the electronic data in a non-contact manner and permits the engine start if the acceptance authentication is successful, but prohibits the engine start if the acceptance authentication is not possible. Such an electronic key (immobilizer transponder) with a built-in transponder is known. Therefore, if the portable device can also be used as the electronic key, one portable device can be used for driving the seat and for starting the engine, so that the cost can be reduced when the vehicle power seat device of the present invention is implemented. be able to.

The block diagram of the automatic access seat system which employ | adopted the power seat apparatus for vehicles of this invention. FIG. 3 is an explanatory diagram illustrating a driving mode of the sheet illustrated in FIG. 1. Explanatory drawing which shows the example of attachment of the operation unit shown in FIG. The flowchart which shows the seat control program performed by seat ECU of FIG. The time chart which shows the drive extension example of a sheet | seat. The time chart which shows the example of a driving stop of a sheet | seat. Explanatory drawing when the portable machine is the electronic key which functions as Example 2 of this invention and functions as a transponder for immobility.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a block diagram of an auto access seat system 1 employing a vehicle power seat device of the present invention. The auto access seat system 1 includes a portable device (wireless portable key, electronic key) 60 that can wirelessly transmit an ID code, and a transponder transceiver 40 that can be wirelessly received by the portable device 60 that is mounted on a vehicle BD and wirelessly transmitted. (Receiver), collation ECU 30 (collation means) for collating the ID code from the portable device 60 with a master code specific to the vehicle BD registered in advance, and that the collation ECU 30 has accepted the ID code. As a condition, it includes a seat ECU 20 (seat control means) that drives an auto access seat 10 (hereinafter simply referred to as a seat 10) installed in the vehicle to a predetermined position. Each ECU (Electronic Control Unit: control circuit) such as the seat ECU 20 and the verification ECU 30 is connected via the in-vehicle LAN 100 so as to be able to multiplex communication with each other.

  As shown in FIG. 2, the seat 10 is reclined by a predetermined angle from the storage position P1 stored in a forward posture at a predetermined position in the vehicle (the broken line state in FIG. 2A), and the forward posture at the storage position P1. In such a state, the vehicle is driven to rotate about 90 ° left and right, and the intermediate position P2 is slid forward to the front of the vehicle (the state shown in FIG. 2B) so that the passenger can easily get on and off the vehicle. Between the swinging position P3 (the state of FIG. 2 (c)) that is driven to slide outwardly of the vehicle and is driven downward so that the seat seat surface height is lower than the seat seat surface height at the intermediate position P2. It can be moved. FIG. 2 illustrates an example in which the seat 10 is applied to the rear seat. However, the present invention is not limited to this, and the seat 10 can also be applied to the front seat.

  The seat 10 is configured to be driven to rotate and slide as described above by the rotation / slide mechanism 12 and to be driven to lower and raise by the lift mechanism 13 (see FIG. 1), and the rotation / slide mechanism 12 and the lift mechanism. 13 is connected to the seat ECU 20 via the drive circuit 11.

  Returning to FIG. 1, the seat ECU 20 includes a microcomputer including a CPU, a ROM, a RAM, an input / output unit (I / O) and the like as main components, and a seat control program (see FIG. 4) stored in the ROM or the like. ) Is repeatedly executed, and the seat 10 is driven in accordance with the execution of the seat control program.

  The verification ECU 30 includes a microcomputer including a CPU, ROM, RAM, input / output unit (I / O) and the like as main components, and includes an ID code verification processing program (not shown) stored in the ROM or the like. Various processing programs are executed repeatedly. Specifically, the verification ECU 30 uses the ID code from the portable device 60 transmitted via the transponder transceiver 40 as a verification master code (master ID) unique to the vehicle stored in the storage device 50. When the verification of both ID codes matches (acceptance authentication), a control signal for permitting the seat ECU 20 to drive the seat 10 is output.

  The transponder transceiver 40 is incorporated in an operation unit 70 described later (see FIG. 3A). The transponder transceiver 40 includes a LF circuit 41a and a transceiver coil 41b, a main circuit unit 41 (magnetic field generation circuit unit) configured by a microcomputer, a wireless communication circuit configured to include a transceiver circuit and a known demodulation circuit. Part 42 (receiving circuit part). The LF circuit 41a generates a magnetic field (for example, an electromagnetic wave in an LF (long wave) band) toward the outside of the transponder transceiver 40 by exciting the transmission / reception coil 41b.

  When the wireless communication circuit unit 42 receives data including the ID code from the portable device 60, the wireless communication circuit unit 42 demodulates the data and sends it to the main circuit unit 41. The main circuit unit 41 reads the ID code from the demodulated data and transmits it to the verification ECU 30.

  The portable device 60 functions as a portable wireless device capable of transmitting data to and from the transponder transceiver 40, and has a memory 62a for storing an ID code unique to the vehicle and is a microcomputer. A transponder 61 including a main circuit unit 62 configured and a wireless communication circuit unit 63 (transmission circuit unit) configured to include a known modulation circuit is provided.

  When the transponder 61 receives the magnetic field generated by the transponder transceiver 40, the transponder 61 generates an induced current in the main circuit unit 62 based on the law of electromagnetic induction. The main circuit unit 62 uses the induced current as electric energy (for example, charging / discharging by a power supply capacitor), and transmits data including an ID code stored in the memory 62a via the wireless communication circuit unit 63. 40.

  In this case, when the portable device 60 is brought close to the transponder transceiver 40 (the distance between the two is within 10 cm, for example), the transponder 61 receives the magnetic field generated by the transponder transceiver 40, and The circuit unit 62 transmits data including the ID code to the transponder transceiver 40.

  On the other hand, when the portable device 60 is moved away from the transponder transmitter / receiver 40 (so that the distance between them exceeds 10 cm, for example), the transponder 61 does not receive the magnetic field generated by the transponder transmitter / receiver 40, and thereafter the main circuit unit. 62 no longer transmits data including the ID code to the transponder transceiver 40.

  An operation unit 70 for instructing in advance the drive mode of the seat 10 is connected to the seat ECU 20. As shown in FIG. 3B, the operation unit 70 is provided on the back surface of the seat back of the front seat FS located on the front side of the seat 10 (see FIG. 3). In addition to the front seat FS, the operation unit 70 may be provided on the side surface of the seat cushion of the seat 10, for example.

  In the operation unit 70, the swing SW 71, the storage SW 72, and the transponder transceiver 40 are arranged close to each other. The swing SW 71 is a switch for instructing in advance that the sheet 10 is driven toward the swing position P3, and the storage SW 72 is for instructing in advance that the sheet 10 is driven toward the storage position P1. Each of the SWs 71 and 72 is configured to be kept in an ON state by a single switch operation unless the driving of the seat 10 is stopped. The operation unit 70 outputs an ON signal corresponding to each of the SWs 71 and 72 to the seat ECU 20 by an ON operation of either the swing SW 71 or the storage SW 72.

  The seat ECU 20 drives the seat 10 toward the swinging position P3 or the storage position P1 when an ON signal corresponding to each of the SWs 71 and 72 is input from the operation unit 70 and a control signal is input from the verification ECU 30. Specifically, the seat ECU 20 outputs a drive signal to the drive circuit 11 according to the drive mode corresponding to the content of the ON signal from the operation unit 70, and the rotation / slide mechanism 12 and the lift mechanism 13 are respectively determined in a predetermined order. To drive.

  Next, the operation of the first embodiment configured as described above will be described. The user instructs in advance whether to drive the seat 10 toward the ejection position P3 or toward the storage position P1 by turning on the ejection SW 71 or the storage SW 72 of the operation unit 70. When any of the swing SW 71 and the storage SW 72 is turned on, the operation unit 70 outputs a corresponding ON signal of the SWs 71 and 72 to the seat ECU 20.

  Thereafter, when the portable device 60 is brought close to the transponder transceiver 40, the transponder 61 receives the magnetic field generated by the transponder transceiver 40, and the main circuit unit 62 sends the data including the ID code to the transponder transceiver 40. Send to. In this case, since the oscillating SW 71 and the storage SW 72 are arranged close to the transponder transceiver 40, the operation of turning on the oscillating SW 71 or the storage SW 72 and the operation of moving the portable device 60 close to or away from the transponder transceiver 40 are continuously performed. Can be performed, and the operability of the apparatus is improved.

  The transponder transceiver 40 reads the ID code from the received radio wave and transmits it to the verification ECU 30. When the ID code matches the master code (acceptance authentication), the verification ECU 30 outputs a control signal for permitting the seat ECU 20 to drive the seat 10.

  Then, as shown in the seat control program of FIG. 4, the seat ECU 20 inputs an ON signal of the swing SW 71 or the storage SW 72 from the operation unit 70 (S1: YES), and permits the driving of the seat 10 from the verification ECU 30. When the control signal is input (S2: YES), the seat 10 is driven toward the swing position P3 or the storage position P1 (S3).

  FIG. 5 shows an example of driving the seat 10, and FIG. 6 shows an example of stopping the driving of the seat 10. As shown in FIG. 5, when the SW signal from the operation unit 70 is on, the seat ECU 20 receives the first control signal from the verification ECU 30 (almost as if the ID code is accepted and verified by the verification ECU 30). At the same time, the driving of the sheet 10 is continued at least for a set time T1 (for example, about 0.5 seconds to 1 second), when the driving of the sheet 10 is started at ID reception by the transponder transceiver 40 in FIG.

  When the seat ECU 20 inputs the next control signal from the verification ECU 30 within the set time T1, the input of the control signal is regarded as the next drive start of the seat 10, and the seat 10 is further driven for the set time T2 (set). The time may be the same as the time T1 or may be different. As described above, when the control signal is periodically input from the verification ECU 30, that is, by continuously holding the portable device 60 over the transponder transceiver 40, the seat 10 reaches the ejection position P3 or the storage position P1 as the final position. Until then, the driving of the sheet 10 is repeatedly extended.

  On the other hand, as shown in FIG. 6, when the SW signal from the operation unit 70 is on, the seat ECU 20 determines when the first control signal is input from the verification ECU 30 as in the case of FIG. 5. At the start of driving, the driving of the seat 10 is continued at least during the set time T1.

  At this time, if the seat ECU 20 does not input the next control signal from the verification ECU 30 within the set time T1, that is, if the portable device 60 is moved away from the transponder transceiver 40 during the set time T1, the set time The driving of the sheet 10 is stopped after T1 has elapsed. Thus, by moving the portable device 60 away from the transponder transmitter / receiver 40, the driving of the seat 10 is stopped after the set time T1 or the like has elapsed, so the operation of stopping the driving of the seat 10 is easy and the safety is good. Secured.

  When the seat 10 is driven again after the driving of the seat 10 is stopped, the portable device 60 is held over the transponder transceiver 40 after either the swing SW 71 or the storage SW 72 in the operation unit 70 is turned on again. That's fine.

  As apparent from the above description, in the first embodiment, since the portable device 60 is driven by the magnetic field generated by the transponder transceiver 40, the portable device 60 does not have to incorporate a battery for driving itself. The problem that the battery consumption on the portable device 60 side is large when the switch for driving the seat 10 is operated is solved. In addition, since both the swing SW 71 and the storage SW 72 of the operation unit 70 are kept in the ON state by a single switch operation, it is not necessary to press and hold each SW 71, 72, and the portable device 60 is removed from the transponder transceiver 40. The drive of the sheet | seat 10 can be stopped by keeping away. Thereby, the problem of the switch long press operation in the portable device 60 can be satisfactorily solved while ensuring safety.

  In the first embodiment, the case where the portable device 60 is dedicated to driving the seat 10 is described. However, the present invention is not limited to this. For example, the portable device 60 may be configured to be used both for driving the seat and for starting the engine. In the second embodiment, as indicated by a broken line in FIG. 1, an engine ECU 80 that controls the engine 90 is connected to the verification ECU 30 via the in-vehicle LAN 100.

  As shown in FIG. 7, an ignition SW 81 (engine starter) is connected to the engine ECU 80. In addition to the transponder transceiver 40 for driving the seat, an engine start transponder transceiver 140 having substantially the same transmission / reception function as the transceiver 40 is incorporated in the key cylinder portion 81a of the ignition SW 81. The transponder transceiver 140 is connected to the engine ECU 80.

  The portable device 60 includes a key portion 60a that can be inserted into the ignition SW 81, for example. The transponder 61 of the portable device 60 is generated in the transmission / reception coil (excitation coil) 81b by inserting or bringing the key portion 60a of the portable device 60 close to the ignition SW 81 (so that the distance between the two is within 10 cm, for example). It receives a magnetic field and transmits data including the ID code to the transponder transceiver 140. Based on the ID code from the portable device 60 received by the transponder transceiver 140, the verification ECU 30 starts the engine 90 with respect to the engine ECU 80 when the ID code matches the master code (acceptance authentication). A control signal that permits

  According to the second embodiment, when the ID code from the portable device 60 is accepted and authenticated by the verification ECU 30 that also functions as the immobilizer control unit, the engine 90 is allowed to start. Starting is prohibited. Thus, since the portable device 60 is also used as an electronic key that functions as an immobilizer transponder, one portable device 60 can be used for the transponder transceiver 40 for driving the seat and the transponder transceiver 140 for starting the engine. Cost reduction can be achieved when implementing the apparatus.

  In addition to the electronic key functioning as an immobilizer transponder, the portable device 60 can be used to lock / unlock a door and start an engine even if the user does not directly pick it up, for example, by bidirectional communication with the vehicle side. It can also be set as the structure which can be combined with the electronic key which has the function to be made.

BD Vehicle 1 Auto Access Seat System 10 Seat (Auto Access Seat)
P1 Storage position P3 Ejection position 20 Seat ECU (Seat control means)
30 Verification ECU (Verification means)
40, 140 Transponder transceiver (receiver)
41 Main circuit (magnetic field generator)
42 Wireless transmission circuit (reception circuit)
60 portable device 61 transponder 62 main circuit part 63 wireless transmission circuit part (transmission circuit part)
70 Operation unit (operation means)
71 Swing switch (operation switch)
72 Storage switch (operation switch)
80 Engine ECU
90 Engine 81 Ignition SW (Engine starter)
100 in-car LAN

Claims (5)

A portable device capable of wirelessly transmitting an ID code, a receiver mounted on a vehicle and capable of wirelessly receiving the ID code transmitted wirelessly by the portable device, and a vehicle in which the ID code from the portable device is registered in advance. A collating unit that collates with a unique master code, and a sheet control unit that drives a seat installed in the vehicle to a predetermined position on condition that the ID code is received and authenticated by the collating unit. A vehicle power seat device,
The vehicle has an operation switch that can be kept in an ON state by a single switch operation, and is provided with operation means for instructing a driving mode of the seat in advance.
The portable device includes a transponder that is driven by a magnetic field generated outside the portable device and includes a transmission circuit unit that wirelessly transmits the ID code.
The receiver includes a magnetic field generation circuit unit that generates a magnetic field toward the outside of the receiver, and a reception circuit unit that wirelessly receives the ID code from the portable device, and receives the received ID code. It is transmitted to the verification means by wireless or wired,
The sheet control means receives the ID code by the collating means, and when the driving mode of the sheet is instructed in advance by turning on the operation switch of the operating means, the sheet control means The power seat device for vehicles characterized by driving.   The seat control means continues to drive the seat for at least a set time after the ID code is received and authenticated by the verification means based on wireless reception of the ID code from the portable device by the receiver. If the ID code is received and authenticated again by the checking means within the set time, the driving of the sheet is further extended by the set time, while the ID is again checked by the checking means within the set time. 2. The vehicle power seat device according to claim 1, wherein if the code is not accepted and accepted, the driving of the seat is stopped after the set time has elapsed.   The seat control means drives the seat from a retracted position inside the vehicle to a swinging position outside the vehicle so that an occupant can easily get on and off the seat by turning on an operation switch of the operating means, or the seat The vehicle power seat device according to claim 1 or 2, wherein the vehicle is driven from the swing-out position toward the retracted position.   The vehicle power seat device according to any one of claims 1 to 3, wherein the receiver and the operation switch are arranged close to each other.   In the engine starting part of the vehicle, an engine starting receiver having the same transmission / reception function as that of the receiver is incorporated separately from the receiver for driving the seat, and is received by the receiver for engine starting. Based on the ID code from the portable device, the portable device is seated so that the engine start of the vehicle is permitted on the condition that the ID code from the portable device is accepted and verified by the verification means. The power seat device for a vehicle according to any one of claims 1 to 4, wherein the vehicle power seat device can be used for both driving and engine starting.