Optical scanning apparatus and image forming apparatus
US11175494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2020 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Feb 18, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/206
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning apparatus includes a light source, a light deflecting unit, an optical member, a casing, a cover member, and a detecting unit. The cover member is provided with a first opening permitting passage of a light beam emitted from the light source, a second opening permitting passage of the light beam deflected by the deflecting unit, and third and fourth openings which are provided in positions on a side opposite from the first and second openings with respect to the deflecting unit. Through the third opening, an outflow of the air from the cover member by rotation of said deflecting unit is relatively high. Through the fourth opening, an inflow of the air into the cover member by rotation of said deflecting unit is relatively high. The detecting unit is provided at a position where the air flow blowing through the third opening hits the detecting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.