Head rest device
US7770967B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 15, 2006 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Mar 5, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2230/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A head rest device that improves reliability of detecting a head on the basis of a change in capacitance without complicating a wiring structure. A head rest device is provided with a head rest rear portion configured to be supported to a seat back, and a head rest front portion freely moving forward and backward between a fully-closed position coming close to the head rest rear portion and a fully-open position separated from the head rest rear portion. The head rest front portion is moved by an actuator. The head rest front portion has a sensor electrode structured such that its capacitance is changed as a head of an occupant approaches, and an ECU controlling the actuator so as to move the head rest front portion and detecting the approach of the head of the occupant on the basis of a change of the capacitance of the sensor electrode thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.