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. 08, 2008
Filed:
Aug. 08, 2005
Yoshihiro Yamazaki, Saitama, JP;
Yuji Kogure, Saitama, JP;
Kazunori Ishizuka, Kanagawa, JP;
Toshiharu Suzuki, Saitama, JP;
Yoshihiro Yamazaki, Saitama, JP;
Yuji Kogure, Saitama, JP;
Kazunori Ishizuka, Kanagawa, JP;
Toshiharu Suzuki, Saitama, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
An assembly-stage focus adjustment mechanism of a zoom lens barrel including a plurality of lens groups which are moved while distances therebetween are changed to perform a zooming operation, the assembly-stage focus adjustment mechanism including two lens fixing frames to which two of the plurality of lens groups are fixed, respectively; two moving frames which linearly move in an optical axis direction during the zooming operation, the two moving frames being respectively screw-engaged with the two lens fixing frames; and a rotational-direction integrating device which makes the two lens fixing frames rotate as one integral body in a direction of rotation relative to the two moving frames when an assembly-stage focus adjustment operation is performed.