Abstract: A load detection structure for seat having support leg member, which comprises: a load detection unit whose one end portion is pivotally provided in the support leg member; a limiter element for limiting vertical movement of another end portion of the load detection unit; and a stopper element for limiting further excessive vertical movement of such another end portion. The load detection unit is connected via bolts and nuts with the seat and includes: a strain plate member; a reinforcement plate member attached on a securing portion of the strain plate member through which the bolts and nuts pass; and a buffer cover member which is attached to a free end of the strain plate member, defining the afore-said another end portion of the load detection unit. A strain gauge is provided at a deflectable area of the strain plate member. The stopper element is provided at the bolt.

Abstract: A load detection structure for seat having support leg member, which comprises: a load detection unit whose one end portion is pivotally provided in the support leg member; a limiter element for limiting vertical movement of another end portion of the load detection unit; and a stopper element for limiting further excessive vertical movement of such another end portion. The load detection unit is connected via bolts and nuts with the seat and includes: a strain plate member; a reinforcement plate member attached on a securing portion of the strain plate member through which the bolts and nuts pass; and a buffer cover member which is attached to a free end of the strain plate member, defining the afore-said another end portion of the load detection unit. A strain gauge is provided at a deflectable area of the strain plate member. The stopper element is provided at the bolt.

Abstract: Method and system for alleviating a fatigue in a seat, wherein there are provided, in combination, a lumbar support mechanism for moving a lumbar support plate towards and away from a lumbar part of a passenger on the seat and a heater for applying a heat thereto, with manual and automatic control modes arranged for operations of those two elements, which may be effected by a simple operation of switches. In the manual control mode, the lumbar support plate and the heater may be adjusted manually for their respective actions. In the automatic control mode, the lumbar support plate may be subject to a repeated reciprocating motion, while allowing the heater to work in synchronism with such reciprocating motion of lumbar support plate.

Abstract: A method and device for controlling a lumbar support device, wherein a motor is controlled its drive under a repeated reversal drive operation to provide a fore-and-aft reciprocation of a lumbar plate within a predetermined operation time in a periodic way, so as to provide a massage effect to the lumbar part of an occupant on the seat. A manual control mode for giving a static lumbar support and in addition thereto, an automatic control mode for giving a dynamic lumbar support to the occupant's lumbar part.

Abstract: Method and device for controlling a motor in a powered seat, wherein one of normal and reverse drive signals from manual or auto switch is detected by a central processing unit, which in turn provides a first period of time defined between one point when the motor starts to drive in normal direction and another point when the normal drive of the motor is stopped, and a second period of time defined between one point when the motor starts to drive in reverse direction and another point when the reverse drive of the motor is stopped, and then, a motor torque switch element brings resistor in electrical connection with the motor terminal, only druing one of those first and second periods of time.

Abstract: Method and device for controlling a motor in a powered seat, wherein a certain standard physique classification is set according to the height of an occupant on the seat, and on the basis of such physical classification, several predetermined standard positions are preset in a central processing unit, and wherein such standard positions may be selected and set temporarily by a mode selection switch and position switch for proper motor control, and further, a desired change of position may be made from the standard position by a manual switch.

Abstract: A method for controlling a lumbar support device and a motor control device provided, which are applied to a powered seat. The motor for causing fore-and-aft movement of a lumbar plate is controlled under a selected one of burst and fluctuation control modes. In the burst control mode, the lumbar plate is moved periodically in the fore-and-aft direction, whereas in the fluctuation control mode, the lumbar plate is moved in a aperiodic and weavering way in that direction, for example, on the basis of 1/f fluctuation waveform, to thereby alleviate a fatigue of lumbar part of a passenger sitting on the seat.

Abstract: A method and device for controlling a headrest, as well as a headrest drive mechanism, wherein the headrest is to be controlled so as to cause the same to automatically return to the use position if it disposed and stopped between an intermediate position and use position.

Abstract: A method of protecting a motor against overload, wherein a voltage of the motor is transformed into a pulse in a manner avoiding influence from the toque of motor, and such pulse having a width is compared with a motor revolution number so as to output an overload detection signal. The overload detection signal in excess of a present value is detected to stop the motor. A motor control device is also provided for that purpose, which includes a chopping wave generator circuit, an operational amplifier and a gate circuit.

Abstract: Method and device for controlling a powered automotive seat of a rotatable type, wherein said seat is caused to move to a neutral position where said seat is free from contact with other adjacent fittings or other occupant, before being subjected to automatic rotation between drive position and climbing/descending position. Further, such automatic rotation of seat is permitted only when a door detector detects the door to be opened at an opening angle larger than a predetermined angle.

Abstract: Method and device for controlling a side support in a powered seat, in which the side support device is controlled in its opening/closing motion in order that it is not moved repeatedly sensitive to each of acceleration being applied to the seat during driving on a curved road, by virtue of a standard checking process for determining an excessive acceleration, and then a short and long hold time system for holding the side support device in unmoved state against repeated or plural intermittent occurrences of accelerations being applied to the seat.

Abstract: A method and device for controlling a headrest provided on a seat back of a seat, in which there is arranged an over-load detecting system for detecting an over-load state of a motor and automatically stopping the motor if the over-load state is detected during displacement of the headrest to a use position, or automatically driving the motor to return the headrest to a use position if the over-load state is detected during displacement of the headrest to a non-use position. This allows for removing an object caught in between the headrest and seat back with much safe.

Abstract: A method and device for controlling a motor in a powered seat, wherein, in an automatic control mode, a rated voltage is applied to the motor, thereby causing a constant high rotation of the motor, and in a manual control mode, firstly the rated voltage is applied to the motor and secondly after a given time, the voltage is changed into a low voltage, causing the motor to be driven at a low rotation rate. Thus, the movable parts of seating posture adjustment device in the seat are moved rapidly in the automatic mode, while in the manual mode, they are firstly moved rapidly and then slowly for permitting an accurate adjustment of position thereof.

Abstract: A method and apparatus for controlling a lumbar support device provided in the seat back of an automotive seat. The control for support against the lumbar of an occupant on the seat is effected through manual and automatic control modes, and the automatic control mode emits alternating pulses for causing repeated alternating series of normal and reverse drives of a motor, to thereby move a lumbar support plate reciprocally forwards and backwards, offering a massage effect to the occupant's lumbar part.

Abstract: A motor control device for a powered seat comprising a switch capable of selective determination for rotation direction of a motor and further of depression for adjustment of rotation rate of the motor, and an electric circuit for causing the motor to rotate in a selected one of normal and reverse directions and increase or decrease its rotation rate in response to the switch-over and depressing/releasing operations of such one switch only.

Abstract: A method and device for controlling a headrest, in which the headrest is controlled its displacement between use and non-use positions as well as its fore-and-aft adjustment movement, through an automatic control system or a manual control system. A changeover switch is provided to select one of those automatic and manual control systems, and further, during operation of the automatic control system, the manual control system can be actuated simply by operating an associated manual adjustment switch. Additionally, a safety arrangements are included, which protects an occupant against the headrest which will contact him or her due to its erroneous operation.

Abstract: Method and device for controlling a slide motion of a vehicle seat, wherein when the seat is moved from a seating position to a backward position, the rotation number of a motor causing such movement is counted up from zero and memorized by a counter, so that the seat is returnable to the seating position precisely in accordance as the counter counts down that memorized rotation number to zero. This control is effected by switch means electrically arranged with the motor via electric circuits, and the counter is reset to zero every time of initial operation of the switch means, thus allowing free setting by different occupant of the seat positions without need for hitherto inputting works inherent in computer control.