Image sensor unit and image reader
US8681398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2011 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Apr 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/02481
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A protruding locking pawl is provided at an end of a light guide which corresponds to a first light input surface. A recessed locking portion is formed in a frame so that the locking pawl can be locked in the locking portion. A light blocking member is slidably loosely inserted into a position where the light blocking member covers a longitudinal end of the light guide which corresponds to a second light input surface. Even if expansion and contraction occurs in the longitudinal direction of the light guide, the design dimensions of a first gap A and a second gap B can be maintained; the first gap A is formed between the first light input surface and a first light source, and the second gap B formed between the second light input surface and a second light source. Therefore, possible leakage current can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.