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. 12, 2005
Filed:
Oct. 23, 2003
Takuji Hamasaki, Saitama, JP;
Takuji Hamasaki, Saitama, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
A lens barrel includes a stationary member; a rotary input shaft; a manual operating ring rotatably supported by the stationary member and rotated by the rotary input shaft via a gear mechanism; an optical element movable along the optical axis by rotation of the manual operating ring; a hollow-cylindrical output gear having a cylindrical inner peripheral surface in which the rotary input shaft is fitted, and an outer gear portion; a non-circular cross section portion formed on the rotary input shaft to form an accommodation space between the rotary input shaft and the cylindrical inner peripheral surface; a ball installed in the accommodation space; and a biasing device for making the orthogonal surface and the ball come into pressing contact. The non-circular cross section portion is shaped so that the rotation of the rotary input shaft is transferred to the hollow-cylindrical output gear via the ball.