Audio/video disc playback apparatus with means for correctly positioning the disc relative to a reference level
AssigneeVictor Company of Japan, Ltd.
InventorTakashi Yamamura
Life of this patent
Estimating the term…
Abstract
Audio/video disc playback apparatus includes a housing, a cover hinged to the housing, a rotor disc mounted in the housing and driven by a motor, and a pressure disc rotatably mounted underside of the cover for providing pressure contact with the rotor disc by the weight of the cover with an audio/video disc held therebetween. The pressure disc is loosely coupled to a mounting attached to the cover by means of a suspension which permits it to disengage from the mounting when the pressure disc comes to contact with the rotor disc as the cover is brought to the closed position so that the pressure disc is self-aligned to the axis of the rotor disc.
Claims11
An audio-video disc playback apparatus, comprising:
- a housing;
- a cover hinged to said housing and rotatable between open and closed positions relative to said housing;
- a rotary drive shaft rotatably mounted in said housing;
- a rotor disc for mounting an audio-video disc and having a tapered portion for engagement with the center hole of the audio-video disc;
- a stationary disc having a diameter equal to or greater than the diameter of said audio-video disc and mounted on the under side of the cover and having an opening at the center thereof;
- a pressure disc;
- one of the rotor and pressure discs having a guide shaft and the other of the rotor and pressure discs being provided with a bore for receiving said guide shaft when the cover is in the closed position;
- a bearing having an inner race coupled to the pressure disc for rotation therewith and an outer race;
- means for mounting the pressure disc in the opening of the stationary disc when the cover is in the closed position;
- and
- means engageable with the mounting means for suspending the pressure disc from said mounting means when the cover is in the open position and disengageable from the mounting means for enabling said guide shaft to be received in said bore to coaxially align the rotor disc and the pressure disc when the cover is in the closed position while engaging the outer race of the bearing with the mounting means so that the audio-video disc is under pressure between the pressure disc and the rotor disc.
Dependencies are inferred from the claim text.