Abstract: In an optical head according to the present invention, an act base on which an objective lens is arranged is formed in a rectangular shape with through holes formed in four corners thereof. A base on which a collimating lens is arranged has projections to engage with the through holes in correspondence with the through holes when the act base is arranged. With the through holes of the act base engaged with the projections of the base, an adhesive is injected to the through holes to thereby fix the act base to the base. This improves the accuracy in bonding between the base and the act base, and permits laser light of a more stable intensity accordingly to be irradiated to the optical disc, thus permitting suppressing failure involved in data recording or reading.

Abstract: A fitting structure for fitting a laser holder holding a semiconductor laser to a base member in an optical pickup device includes a support member of a metal plate that supports the laser holder. The support member integrally has: a base part having a laser passage hole that is formed in the center thereof for permitting laser light from the semiconductor laser to pass therethrough; an upper projecting part and a lower projecting part that respectively project from the upper and the lower edges of the base part so as to oppose each other and that support the laser holder so that the laser holder can swing about the vertical axis; and a bending part that is elastically deformable and that first projects from the upper edge of the base part toward a side opposite to a side toward which the upper projecting part projects and then is bent downward and also inward toward the base part.

Abstract: A disk apparatus includes a chassis fixed to an apparatus body, a drive unit being ascendable or descendable with respect to the chassis through a plurality of gears by driving a motor, a pickup unit provided with an optical pickup that is movable by driving the motor, a cam slider arranged on the chassis and being movable in a direction, and a plate trigger provided with an inclined cam groove and being movable in the direction through cam engagement with the pickup unit and causes the drive unit to ascend or descend through cam engagement with the cam slider. The plate trigger and the cam slider move integrally in mesh with the gears coupled with the motor respectively. The tip of the tooth of the gear to be in mesh with a triangular tooth formed in the plate trigger is made sharp.

Abstract: There is provided an optical pickup capable of improving the vibration resistance without causing a reduction in assembling workability and thereby mass productivity or the servo performance thereof. An optical pickup is mounted astride a main shaft 101 and a secondary shaft 102. The travel of the optical pickup is adapted to be guided by the main shaft, where a secondary bearing part 3 adapted to slide relative to the secondary shaft 102 includes an overlapping sliding face 32 and an auxiliary overlapping face 36, and a clearance ? is formed between the auxiliary overlapping face 36 and the secondary shaft 102 to improve assembling workability. A control element 41 is mounted on a printed circuit board 4 mounted on a base member 1, and the control element is overlapped with a radiator plate 5.

Abstract: A pair of left and right pressing pieces and to press down the front part of the upward moving drive chassis are provided so as to protrude from the front part of the casing integrally therewith, the left side pressing piece of both the corresponding pressing pieces and is formed so as to be resiliently displaced with a protruding portion erected at the tip end thereof, and the inner side of the corresponding protruding portion is made into an inclined pressing plane which is inclined in the left direction at a prescribed angle so that it is turned downward so as to be widened outwardly, the front part side edge of the upward moving drive chassis is formed so as to be resiliently brought into contact with the inclined pressing plane thereof.

Abstract: A tray drive mechanism has a simple structure, and yet both an optical disc clamping operation and a tray opening and closing operation can be driven by one feed motor.

Abstract: A disk apparatus includes a chassis fixed to an apparatus body, a drive unit being ascendable or descendable with respect to the chassis through a plurality of gears by driving a motor, a pickup unit provided with an optical pickup that is movable by driving the motor, a cam slider arranged on the chassis and being movable in a direction, and a plate trigger provided with an inclined cam groove and being movable in the direction through cam engagement with the pickup unit and causes the drive unit to ascend or descend through cam engagement with the cam slider. The plate trigger and the cam slider move integrally in mesh with the gears coupled with the motor respectively. The tip of the tooth of the gear to be in mesh with a triangular tooth formed in the plate trigger is made sharp.