Self locking device of an active headrest
US7364231B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2006 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Dec 29, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/888
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An active headrest includes a panel inside a seat frame, a panel link supporting the panel and rotating in response to raising of the panel, and a frame which is raised by the panel. A self locking device of the active headrest includes: a guide cylinder in the seat back frame, defining a receiving indentation therein; a return spring in the receiving indentation; and a locking piston in the receiving indentation, a first end of the locking piston being coupled to the return spring, and a second end of the locking piston being exposed to outside the guide cylinder, wherein the locking piston is kept in the guide cylinder by the panel link at the non-operated position of the active headrest, and pressed outside of the guide cylinder by the return spring to restrain rotation of the panel link at the operated position of the active headrest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.