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:
Apr. 10, 2012
Filed:
Jun. 14, 2010
Masayuki Misawa, Tokyo, JP;
Masayuki Misawa, Tokyo, JP;
Pentax Ricoh Imaging Company, Ltd., Tokyo, JP;
Abstract
A power transmission mechanism includes a cam-incorporated gear which rotates in one rotational direction by a driving force transmitted from a drive source via a planet gear when engaged with the planet gear, wherein the cam-incorporated gear stops rotating when disengaged from the planet gear; a driven member which includes a follower which contacts at least one surface cam formed on the cam-incorporated gear, the driven member being driven in accordance with the rotation of the cam-incorporated gear in the one rotational direction, and exerting a surplus torque on the cam-incorporated gear in the one rotational direction thereof so as to increase the rotation of the cam-incorporated gear in the one rotational direction, the surplus torque being independent of a torque exerted on the cam-incorporated gear by the drive source; and a damping mechanism which continuously exerts a load torque on the cam-incorporated gear in a rotational direction opposite to the one rotational direction of the cam-incorporated gear so as to cancel out the surplus torque.