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:
Jun. 15, 1993
Filed:
Sep. 04, 1991
Norikatsu Inoue, Tokyo, JP;
Satoshi Sakamoto, Tokyo, JP;
Sony Corporation, , JP;
Abstract
A novel lens barrel which includes a comparatively small number of parts, has a comparatively low weight and can be produced at a comparatively low cost. The lens barrel apparatus comprises an outer shell, a lens holding member holding a focusing lens thereon and mounted in the outer shell for movement in a direction of an optic axis of the focusing lens, and an actuator including an actuating coil secured to one of the lens holding member and the outer shell and wound around a coil bobbin. The actuator further includes a magnet secured to the other of the lens holding member and the outer shell in a coaxial relationship with the actuating coil around the optic axis, and a detecting coil is wound on the coil bobbin in an overlapping relationship with the actuating coil for detecting a speed of movement of the focusing lens.