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:
May. 31, 2011
Filed:
Mar. 12, 2009
Takamitsu Sasaki, Saitama, JP;
Takamitsu Sasaki, Saitama, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A lens barrel includes a driven ring, a follower provided on the driven ring, a rotational transfer ring including a circumferential groove having no axial-direction component and a rotational transfer groove including an axial-direction component, a guide ring, and a cam groove formed on the guide ring for guiding the driven ring via the follower. Rotation of the driven ring is prevented when the follower is engaged in the circumferential groove so that the driven ring is held at a non-photographing position. When the follower is engaged in the rotational transfer groove, the driven ring is moved along the cam groove between the non-photographing position and a ready-to-photograph position. Opposed wall surfaces in the circumferential groove determine a position of the follower when the driven ring moves between the non-photographing position and the ready-to-photograph position. The range of the cam groove, that is used to move the driven ring between the ready-to-photograph position and the non-photographing position of the guide ring, includes an axial-direction component.