Title:
車両用ヘッドレスト装置
Document Type and Number:
Japanese Patent JP4654815
Kind Code:
B2
Abstract:
A headrest apparatus for a vehicle includes a headrest rear portion, a headrest front portion being movable between a fully closed position and a fully open position, a driving means for moving the headrest front portion, a capacitance sensor provided at the headrest front portion for detecting a change in capacitance, and a controlling means for controlling the driving means and comparing an amount of change in capacitance detected by the capacitance sensor to a predetermined threshold value when the headrest front portion moves towards the fully open position. The controlling means determines that the headrest front portion is positioned close to a head of an occupant when the amount of change in capacitance exceeds the threshold value. Further, the controlling means detects a capacitance change per unit moving distance of the capacitance sensor at a predetermined timing and changes the threshold value based on the detected result.
Inventors:
Morio Sakai
Koichi Hirota
Koichi Hirota
Application Number:
JP2005216438A
Publication Date:
March 23, 2011
Filing Date:
July 26, 2005
Export Citation:
Assignee:
Aisin Seiki Co., Ltd.
International Classes:
B60N2/48; A47C7/38; B60R21/055
Domestic Patent References:
| JP64011511A | ||||
| JP7067744A | ||||
| JP11169258A | ||||
| JP2003054343A | ||||
| JP2005087650A |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda