Method and device for controlling headrest
First Claim
1. A method for controlling a headrest, in which said headrest is displaceable between a use position where it supports a head of an occupant on a seat and a non-use position where it is moved away from a view field of another occupant on another seat, said method comprising the steps of:
- detecting an over-load state of a motor which is used for causing the displacement of said headrest;
discriminating a correct electric signal among other signals in order to drive sad motor in a proper manner;
effecting an automatic displacement of said headrest to said use position, if said over-load state of said motor is detected during displacement of said headrest to said non-use position, by way of driving said motor in a direction to cause said headrest to move toward said use position; and
causing said motor to cease its drive, if an over-load state of said motor is detected during displacement of said headrest to said use position, whereby said headrest is immediately stopped at a point where said motor over-load state is detected.
1 Assignment
0 Petitions
Accused Products
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.
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Citations
10 Claims
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1. A method for controlling a headrest, in which said headrest is displaceable between a use position where it supports a head of an occupant on a seat and a non-use position where it is moved away from a view field of another occupant on another seat, said method comprising the steps of:
- detecting an over-load state of a motor which is used for causing the displacement of said headrest;
discriminating a correct electric signal among other signals in order to drive sad motor in a proper manner; effecting an automatic displacement of said headrest to said use position, if said over-load state of said motor is detected during displacement of said headrest to said non-use position, by way of driving said motor in a direction to cause said headrest to move toward said use position; and causing said motor to cease its drive, if an over-load state of said motor is detected during displacement of said headrest to said use position, whereby said headrest is immediately stopped at a point where said motor over-load state is detected. - View Dependent Claims (2, 3, 4, 5, 6)
- detecting an over-load state of a motor which is used for causing the displacement of said headrest;
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7. A device for a controlling a headrest, comprising:
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a headrest disposed upon a seat back of a seat, said headrest being displaceable between a use position where it supports a head of an occupant on the seat and a non-use position where it is moved away from a view field of another occupant; a motor for causing said headrest to move between said use and non-use positions; an automatic switch for controlling a drive of said motor so as to effect said headrest displacement between said use and non-use position; a central processing unit which processes data being input thereinto, in accordance with a given program; an over-load detecting means for detecting an over-load state of said motor; and a discrimination circuit for discriminating a correct electric signal among signals from other associated electric elements in said device in order to drive said motor in a proper manner, whereby, when said over-load detecting means detects said over-load state of said motor during displacement of said headrest towards said non-use position, said motor is caused immediately to be driven in a reverse direction so as to return said headrest to said use position automatically, and when said over-load state of said motor is detected by said detecting means during displacement of said headrest to said use position, then said motor is stopped immediately to ring said headrest to a halt at a point where said motor has thus been stopped by said over-load state. - View Dependent Claims (8, 9, 10)
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Specification