HEAD RESTRAINT POSITION ADJUSTING DEVICE AND HEAD RESTRAINT POSITION ADJUSTING METHOD
First Claim
1. A head restraint position adjusting device comprising:
- a plurality of detection electrodes arranged side by side in a line along a height direction of a head restraint attached to a seat of a vehicle, and each configured to detect a capacitance between a head of a human body sitting down the seat and the head restraint;
a detection circuit configured to detect a reference position of the head in the height direction based on detection signals from the plurality of respective detection electrodes; and
position adjusting means for adjusting a position of the head restraint relative to the seat with reference to the reference position of the head in the height direction in accordance with a detection result of the detection circuit, andthe plurality of detection electrodes being provided by what corresponds to a number required for detecting the reference position of the head in the height direction with the head restraint being at a standstill.
1 Assignment
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Accused Products
Abstract
A head rest position adjusting device 100 has a capacitance sensor unit 10 and a drive motor unit 30, and the capacitance sensor unit 10 has plural detection electrodes 11 to 15. Each detection electrode 11 to 15 are formed in a rectangular strip having a long side arranged in a width direction intersecting with a height direction of a head restraint 43 at the front face side thereof, and are arranged in such a way that the long sides are aligned along the height direction. A detection circuit 20 has plural capacitance detection circuits 21 to 25 connected to the detection electrodes 11 to 15, respectively, and an arithmetic processing circuit 28, and the drive motor unit 30 has a motor drive circuit and a drive motor. Even if the head restraint 43 is in an initial condition, the detection circuit 20 detects an estimated center position of a head 49 in the height direction or a detection electrode having the highest output as a reference position from detection signals from individual detection electrodes 11 to 15, and adjusts a position of the head restraint 43 relative to a seat 40 with reference to the reference position.
52 Citations
17 Claims
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1. A head restraint position adjusting device comprising:
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a plurality of detection electrodes arranged side by side in a line along a height direction of a head restraint attached to a seat of a vehicle, and each configured to detect a capacitance between a head of a human body sitting down the seat and the head restraint; a detection circuit configured to detect a reference position of the head in the height direction based on detection signals from the plurality of respective detection electrodes; and position adjusting means for adjusting a position of the head restraint relative to the seat with reference to the reference position of the head in the height direction in accordance with a detection result of the detection circuit, and the plurality of detection electrodes being provided by what corresponds to a number required for detecting the reference position of the head in the height direction with the head restraint being at a standstill. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A head restraint position adjusting method comprising:
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detecting a capacitance between a head of a human body sitting down a seat of a vehicle and a head restraint attached to the seat through a plurality of detection electrodes arranged side by side in a line in the head restraint along a height direction of the head restraint, the plurality of detection electrodes being provided by what corresponds to a number required for detecting a reference position of the head of the human body sitting down the seat in the height direction with the head restraint being at a standstill; detecting the reference position of the head in the height direction based on detection signals each indicating a detected capacitance and output by each of the plurality of detection electrodes; and adjusting a position of the head restraint relative to the seat with reference to the detected reference position of the head in the height direction. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification