首页>
外国专利>
DEVICE FOR MEASURING DISTANCE BETWEEN HEADREST AND HEAD, METHOD FOR MEASURING DISTANCE BETWEEN HEADREST AND HEAD, HEADREST POSITION ADJUSTING DEVICE, AND HEADREST POSITION ADJUSTING METHOD
DEVICE FOR MEASURING DISTANCE BETWEEN HEADREST AND HEAD, METHOD FOR MEASURING DISTANCE BETWEEN HEADREST AND HEAD, HEADREST POSITION ADJUSTING DEVICE, AND HEADREST POSITION ADJUSTING METHOD
A headrest position adjusting device 100 includes a distance measuring device 10 and a drive motor unit 30, and the distance measuring device 10 includes a plurality of sensing electrodes 11 to 15 and a detecting circuit 20. The detecting circuit 20 includes a plurality of capacitance sensing circuits 21 to 25 connected one-to-one to the sensing electrodes 11 to 15 and an arithmetic processing circuit 28, and the drive motor unit 30 includes a motor driving circuit and a drive motor. Based on the detected capacitance values, the detecting circuit 20 calculates a distance calculation angle ¸ formed by points representing the positions and output values of the sensing electrodes 15 and 11 located at the highest and lowest positions and a point representing the position and output value of the largest output value, and thereby measures an electrode-head distance L. A position adjusting operation for a headrest 43 is performed based on the measurement result.
展开▼