US 5,311,497 AGranted

Pickup feeding apparatus for a double-sided reproducing disc player

AssigneeSony Corporation

InventorsKazuyuki Takizawa, Hideki Okii, Minoru Otsuka

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Abstract

An optical pickup can be inverted accurately and smoothly regardless of the skew operation of the optical pickup. The present invention is directed to a disc player in which a single optical pickup (37) is inverted in an opposing relation to both surfaces of a disc (D) at the same time when it is elevated so that both surfaces of the disc (D) can be reproduced. As an inverting mechanism (79) of the optical pickup (37), an inverting gear (80) is attached to a supporting shaft (53) on which the optical pickup (37) is supported. On the other hand, an inverting rack (81) which is meshed with the inverting gear (80) so as to invert the optical pickup (37) is attached through a supporting frame (82) to a lower chassis (4) which is skewed.

Claims19

Dependent claims

A pickup feeding apparatus for a double-sided reproducing disc player in which a single optical pickup is moved so as to oppose both recording surfaces of a disc on which signals are recorded and reproduces both recording surfaces of the disc loaded onto a turntable, comprising:

(a) an upper chassis and a lower chassis facing to said both recording surfaces of said disc and which are disposed in substantially parallel to a disc surface;
(b) a rear chassis for coupling said upper and lower chassis;
(c) a carriage meshed with first and second racks which are disposed on said upper and lower chassis so as to extend over inner and outer peripheries of said disc, said carriage being transported in the diametrical direction of said disc;
(d) an optical pickup supported on said carriage so that it can be inverted about a shaft disposed in the direction perpendicular to the direction in which said carriage is moved, said optical pickup being moved along first and second guide shafts respectively disposed on said upper and lower chassis in parallel to said first and second racks;
(e) tilt means for adjusting a tilt of said upper and lower chassis in a ganged relation so that said optical pickup is skewed;
(f) pickup elevating means for linearly elevating said carriage together with said optical pickup between said upper and lower chassis along said rear chassis, said pickup elevating means including
an elevating member for holding said optical pickup, said elevating member being coupled through the rear chassis to at least one of said upper and lower chassis skewed by said tilt means,
an elevation motor for elevating said elevating member,
an elevating guide shaft whose lower end is supported from said lower chassis along said rear chassis and whose upper end is supported by said rear chassis and wherein the elevating member is supported by said elevating guide shaft and has parallel engagement pins projected therefrom in the same direction as the axial direction of the first and second guide shafts, and
(g) inverting means for inverting said optical pickup while said carriage is being elevated.

7 more elements

(a) an upper chassis and a lower chassis facing to said both recording surfaces of said disc and which are disposed substantially parallel to a disc surface;
(b) a rear chassis for coupling said upper and lower chassis;
(c) a carriage meshed with first and second racks which are disposed on said upper and lower chassis so as to extend over inner and outer peripheries of said disc, said carriage being transported in the diametrical direction of said disc;
(d) an optical pickup supported on said carriage so that it can be inverted about a shaft disposed in a direction perpendicular to the direction in which said carriage is moved, said optical pickup being moved along first and second guide shafts respectively disposed on said upper and lower chassis in parallel to said first and second racks;
(e) tilt means for adjusting a tilt of said upper and lower chassis in a ganged relation so that said optical pickup is skewed;
(f) pickup elevating means for linearly elevating said carriage together with said optical pickup between said upper and lower chassis along said rear chassis;
and
(g) inverting means for inverting said optical pickup while said carriage is being elevated, wherein said inverting means comprises an inverting gear attached to a supporting shaft on which said optical pickup is supported so as to be inverted, said inverting gear being unitarily rotated with said optical pickup and an inverting rack attached to at least one of said upper and lower chassis skewed by said tilt means, said inverting rack being meshed with said inverting gear to thereby invert said optical pickup.

5 more elements

Dependencies are inferred from the claim text.