The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2021
Filed:
Oct. 30, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Takahiro Kamikura, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Disclosed is an optical scanning device, including: a motor () including a rotor () capable of rotating integrally with a shaft (); a polygon mirror () including a through-hole (); a holding spring () configured to be engaged to the shaft () that is inserted into the through-hole () and configured to press the polygon mirror () onto the rotor (); and a restricting member () disposed in the through-hole () of the polygon mirror (), the restricting member () being configured to be in contact with the rotor () and the holding spring () and to restrict the holding spring () from moving toward a side of the rotor (), wherein a linear expansion coefficient (A) of the restricting member () is less than a linear expansion coefficient (B) of the polygon mirror ().