Dynamic information storage or retrieval – With particular cabinet structure – With mechanism to place disc on a turntable
Patent
1988-04-07
1989-05-09
Stephan, Steven L.
Dynamic information storage or retrieval
With particular cabinet structure
With mechanism to place disc on a turntable
369270, G11B 1704
Patent
active
048295019
ABSTRACT:
A clamper for a disk player is disclosed. A locking lever is fitted in a turnable manner on a clamping cam which is moved backward and forward in a prescribed position along a chassis in the body of the disk player to move up and down a clamper holder fitted with the clamping cam, to clamp the recording disk on the spindle motor. The locking lever is provided with a driving force transmission portion and an action control portion. The driving force transmission portion is engaged with an operating unit for transmitting a driving force in a timed manner. The action control portion is engaged in an action control cam groove provided in the chassis and having a locking portion and a locking/unlocking guide cam surface. When a timed driving force is applied to the locking lever by the backward movement of the operating unit in the direction of retraction. The action control portion is engaged and guided in the action control cam groove so that the locking lever is turned for unlocking and performs a backward movement in a prescribed position; when a timed driving force is applied to the locking lever by the forward movement of the operating unit in the direction of protrusion. The action control portion is engaged and guided in the action control cam groove so that the locking lever performs a forward movement in a prescribed position and is turned for locking. The clamping cam, which is moved together with the locking lever, is moved backward and foward in a prescribed position in a timed manner along with the action of the locking lever so as to clamp the recording disk on the spindle motor in a timed manner. An urging portion is provided in an appropriate position on one of the chassis and the locking lever which are components of the clamper. An urging portion controller is provided in an appropriate position on the other of the chassis and the locking lever. Only when the action control portion is in a front and a rear positions wherein the action control portion is engaged with and disengaged from the locking portion, an urging force acts so that the action control portion operates while being in contact with the locking/unlocking guide cam surface.
REFERENCES:
patent: 4672598 (1987-06-01), Koken et al.
Seto Yasuhiko
Takahashi Junji
Pioneer Electronic Corporation
Stephan Steven L.
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