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 output information as a detection signal;
a detection circuit configured to detect a reference position of the head in the height direction based on the 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 detected 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,wherein the information output by each detection electrode indicating a capacitance and the detection circuit being configured to detect capacitances between a head of a human body sitting down in the seat and each of the detection electrodes based on each detection signal,wherein the detection circuit obtains a single capacitance value for each of the plurality of electrodes while keeping the head restraint in standstill, and determines the reference position of the head in the height direction by using only the single capacitance value for each of the plurality of electrodes, andwherein the plurality of detection electrodes includes at least five detection electrodes.
1 Assignment
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Accused Products
Abstract
A head rest position adjusting device has a capacitance sensor unit and a drive motor unit, and the capacitance sensor unit has plural detection electrodes which are arranged in such a way that the long sides are aligned along the height direction. A detection circuit has plural capacitance detection circuits connected to the detection electrodes, respectively, and an arithmetic processing circuit, and the drive motor unit has a motor drive circuit and a drive motor. Even if the head restraint is in an initial condition, the detection circuit detects an estimated center position of a head in the height direction or a detection electrode having the highest output as a reference position from detection signals from individual detection electrodes, and adjusts a position of the head restraint relative to a seat with reference to the reference position.
3 Citations
12 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 output information as a detection signal; a detection circuit configured to detect a reference position of the head in the height direction based on the 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 detected 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, wherein the information output by each detection electrode indicating a capacitance and the detection circuit being configured to detect capacitances between a head of a human body sitting down in the seat and each of the detection electrodes based on each detection signal, wherein the detection circuit obtains a single capacitance value for each of the plurality of electrodes while keeping the head restraint in standstill, and determines the reference position of the head in the height direction by using only the single capacitance value for each of the plurality of electrodes, and wherein the plurality of detection electrodes includes at least five detection electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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 obtains a single capacitance value for each of the plurality of electrodes while keeping the head restraint in standstill, and by using only the single capacitance value for each of the plurality of electrodes, compares capacitance values with each other to detect a maximum value of said capacitance values, and calculates a position corresponding to the detection electrode detecting the maximum value as an estimated center position of the head in the height direction; and position adjusting means for adjusting the head restraint such that a reference position of the head restraint is aligned with the estimated center position of the head in the height direction, wherein the plurality of detection electrodes are provided by what corresponds to a number required for detecting the estimated center position of the head in the height direction in a stationary state at the initial position, and wherein the plurality of detection electrodes includes at least five detection electrodes. - View Dependent Claims (11)
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12. A head restraint position adjusting device comprising:
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at least five 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 output information as a detection signal; a detection circuit configured to detect a reference position of the head in the height direction based on the 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 detected reference position of the head in the height direction in accordance with a detection result of the detection circuit, the at least five detection electrodes being provided for detecting the reference position of the head in the height direction with the head restraint being at a standstill, and the information output by each detection electrode indicating a capacitance and the detection circuit being configured to detect capacitances between a head of a human body sitting down in the seat and each of the detection electrodes based on each detection signal.
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Specification