Image forming apparatus including a duct for airflow having a sectional area that becomes gradually smaller toward a part of a rotating shaft exposed into the duct
US9285769B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2015 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | May 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1666
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an optical scanning device, a duct, and a cooling fan. The optical scanning device has a rotating polygon mirror, a motor which has a rotating shaft fixed to the rotating polygon mirror, and a housing that accommodates the rotating polygon mirror and the motor. The duct is disposed adjacent to the optical scanning device, and a part of the rotating shaft is exposed into the duct. The cooling fan generates airflow inside the duct. A sectional area of the duct becomes gradually small toward the part of the rotating shaft exposed into the duct from an upstream side of the part of the rotating shaft exposed into the duct with respect to a flow direction of the airflow in the duct, and a sectional area of the duct becomes large at a downstream side of the part of the rotating shaft exposed into the duct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.