Light guide for a control knob fitted with a rotary index
US7524074B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2006 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Dec 18, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2360/33
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
This invention relates to a light guide (1) for a control knob, particularly an instrument panel of a vehicle. The knob is fitted with an index (3) free to move in rotation about an axis (A). The light guide (1) will be inserted between a light source (2) and the index (3) and comprises at least one entry surface (4) for light rays emitted by the light source (2), a first exit surface (6) of light rays towards the index (3) and side faces (5) inserted between the entry surface (4) and the first exit surface (6). The light guide comprises first optical means (4, 8, 15, 16) to orient received light rays approximately parallel to the rotation axis (A) of the index (3), and second optical means (5, 22, 14, 17, 18, 19, 20) to focus the previously reoriented light rays towards at least the first exit surface (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.