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:
Jul. 20, 1999
Filed:
Apr. 15, 1997
Kazumitsu Takezawa, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
In a lens barrel which drives a focusing optical system using only one set of a cam groove and a cam pin engaged with the cam groove, the cam groove and the cam pin jointly defining a zooming operation and a focusing operation of the focusing optical system, to increase an automatic focusing speed, there is provided with a manual driving section rotated around an optical axis, an automatic driving section rotated around the optical axis and a rotation straight advance converting section for driving the focusing optical system after converting the rotational motion of the manual driving section or the automatic driving section into a straight advance motion by using only set of the cam groove and the cam pin for jointly defining the zooming and focusing operations of the focusing optical system. The manual driving section, the automatic driving section and the rotation straight advance converting section are interlocked with one another. A power transmitting member for directly transmitting power from the automatic driving section to the rotation straight advance converting section without passing this through the manual driving section is provided.