Headrest apparatus for vehicle
First Claim
1. A headrest for a vehicle, comprising:
- a headrest rear portion supported at a seatback;
a headrest front portion movable between a fully closed position in which the headrest front portion is close to the headrest rear portion, and a fully open position in which the headrest front portion is away from the headrest rear portion;
driving means for moving the headrest front portion;
a capacitance sensor detecting a change in capacitance in association with an approach of the head of an occupant;
controlling means for controlling the headrest front portion to move to the fully open position in response to information that a vehicle is approaching from the rear, the controlling means controlling the driving means to stop a movement of the headrest front portion when the head of the occupant is detected on the basis of a detection signal from the capacitance sensor, the controlling means including a first filter having a first cutoff frequency and a second filter having a second cutoff frequency lower than the first cutoff frequency; and
wherein the controlling means control the first filter and the second filter to start operating at the same time as an operation start of the capacitance sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
A headrest apparatus for a vehicle includes a headrest rear portion supported at a seatback, a headrest front portion movable between a fully closed position and a fully open position, a driving device for moving the headrest front portion, a capacitance sensor detecting a change in capacitance in association with an approach of the head of an occupant, and a controlling device for controlling the headrest front portion to move to the fully open position in response to information that a vehicle is approaching from the rear, the controlling device controlling the driving device to stop a movement of the headrest front portion when the head of the occupant is detected on the basis of a detection signal from the capacitance sensor, the controlling device including a first filter having a first cutoff frequency and a second filter having a second cutoff frequency lower than the first cutoff frequency.
20 Citations
7 Claims
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1. A headrest for a vehicle, comprising:
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a headrest rear portion supported at a seatback; a headrest front portion movable between a fully closed position in which the headrest front portion is close to the headrest rear portion, and a fully open position in which the headrest front portion is away from the headrest rear portion; driving means for moving the headrest front portion; a capacitance sensor detecting a change in capacitance in association with an approach of the head of an occupant; controlling means for controlling the headrest front portion to move to the fully open position in response to information that a vehicle is approaching from the rear, the controlling means controlling the driving means to stop a movement of the headrest front portion when the head of the occupant is detected on the basis of a detection signal from the capacitance sensor, the controlling means including a first filter having a first cutoff frequency and a second filter having a second cutoff frequency lower than the first cutoff frequency; and wherein the controlling means control the first filter and the second filter to start operating at the same time as an operation start of the capacitance sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification