Zoom lens barrel with focal length detector
US5327184A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Apr 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens barrel includes a code plate and brushes which selectively come into contact with the code plate to detect focal length variance during zooming, so that focal length data thus detected can be transmitted to a camera body through a flexible printed circuit (FPC) board, one of the code plate land brushes being secured to a mounting member and the other of the brushes or code plate being secured to a linearly movable member. The brushes are provided with elastically deformable lengths which can be connected to the FPC board, and a connecting portion thereof connected to the code plate. The mounting member or linearly movable member to which the brush assembly is secured is provided with an FPC board inserting groove with which the elastically deformable legs of the brushes can come into contact. The FPC board is provided with an insertion portion which is inserted between the FPC board inserting groove and the elastically deformable legs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.