Optical disc apparatus

An optical disc apparatus which records or reproduces information onto/from an optical disc, the apparatus comprising:

• an optical pickup which irradiates a laser beam onto the optical disc through an objective lens for recording or reproducing information;
• a pickup moving mechanism which allows the optical pickup mounted on said pickup moving mechanism to be moved in a substantially radial direction of the optical disc;
• a disc motor which drives the optical disc to rotate;
• a tray which inserts or discharges the optical disc into/from an apparatus body;
• and
• a chassis which is formed as a unified single body made of a synthetic resin material in which a supporting portion and coupling portions are formed as a part of the unified single body and moves together with the tray when the tray moves to insert or discharge the optical disc into/from the apparatus body, the supporting portion supporting, the pickup moving mechanism and the disc motor, the coupling portions being coupled directly to the tray at plural points in a state where a part of the unified single body of the chassis directly contacts with the corresponding portions of the tray without interposing a vibration-proofing member, wherein:
• the chassis is configured in such a manner that each of the coupling portions has a plane-like first portion and a protruding second portion, the protruding second portion being continued to the plane-like first portion, each protruding second portion protruding in the rotational axis direction of the disc motor and having a hole which penetrates in the rotational axis direction of the disc motor, and an end surface on a tray surface direction side of each protruding second portion contacting directly with the tray surface and the plane-like first portion being positioned at a predetermined height from the tray surface,
• the tray has a protruding chassis engaging portion at a position corresponding to each respective hole of each protruding second portion of the coupling portions of the chassis, the protruding chassis engaging portion being inserted into each respective hole of each protruding second portion of the coupling portions of the chassis to fix the chassis directly to the tray in a state where an outer surface of the protruding chassis engaging portion contacts directly with a inner surface of the coupling portions of the chassis in the respective hole, and the bottom cover being fixed on an end surface of the protruding chassis engaging portion, and
• when an impact force is applied to the optical disc apparatus at a time of a recording or reproducing operation, each of the coupling portions suppresses a displacement of the chassis to a low level and suppresses an oscillation of the optical pickup and a displacement of the disc motor to a low level through the supporting portion and the pickup moving mechanism, and the recording or reproducing operation is continued without a contact between a tip end of the objective lens and a disc surface even upon a condition of a short working distance.

An optical disc apparatus which records or reproduces information onto/from an optical disc, the apparatus comprising:

• an optical pickup which irradiates a laser beam onto the optical disc through an objective lens for recording or reproducing information;
• a pickup moving mechanism which allows the optical pickup mounted on said pickup moving mechanism to be moved in a substantially radial direction of the optical disc;
• a disc motor which drives the optical disc to rotate;
• a tray which inserts or discharges the optical disc into/from an apparatus body;
• and
• a chassis which is formed as a unified single body made of a synthetic resin material in which a supporting portion and coupling portions are formed as a part of the unified single body and moves together with the tray when the tray moves to insert or discharge the optical disc into/from the apparatus body, the supporting portion supporting the pickup moving mechanism and the disc motor, the coupling portions being coupled directly to the tray at plural points in a state where a part of the unified single body of the chassis directly contacts with the corresponding portions of the tray without interposing a vibration-proofing member, wherein:
• when an impact force is applied to the optical disc apparatus at a time of a recording or reproducing operation, each of the coupling portions suppresses a displacement of the chassis to a low level and suppresses an oscillation of the optical pickup and a displacement of the disc motor to a low level through the supporting portion and the pickup moving mechanism, and the recording or reproducing operation is continued without a contact between a tip end of the objective lens and a disc surface even upon a condition of a short working distance.