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:
Sep. 05, 1989
Filed:
May. 02, 1988
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic recording and reproducing apparatus having the magnetic disc cassette with a built-in shutter, a shutter lever for opening and closing the shutter and lock lever for controlling a lowering and raising of a holder are installed on an upper surface of the holder. During the insertion of the magnetic disc cassette, the shutter lever releases the shutter, the lock lever is disengaged from a locking step of an eject lever, the shutter lever is lowered into the cassette and releases the shutter, and a magnetic head contacts the magnetic disc. During ejection of the cassette, a lock releasing step of the eject lever is pressed on a stop lever, the stop lever is rotated and is disengaged from the lock lever, an operation lever of the lock lever is disengaged from the shutter lever, and the cassette is disengaged and simultaneously the shutter is closed. During a protective operation, the shutter lever is pressed on the shutter, a shutter push member of the shutter lever is pressed on the holder and is stopped, a lock claw of the lock lever remains engaged with a lock releasing step of the eject lever, and the cassette and the holder are not lowered and the magnetic head does not collide with the shutter.