Patent ID: 7558182

Claim:
An optical disc for recording and/or reading data by irradiating a laser beam on an optical disc by an optical head, wherein said optical head includes: a base to which a laser light source for irradiating a laser beam is fixed; and a cover member which covers the bottom surface of said base, said base includes a light source installation portion, said light source installation portion having: a light source insertion hole into which a laser beam emitting unit of said laser light source is inserted and that has a key for engaging with a key groove formed on a side surface of said laser light source; at least one boss disposed adjacent to said light source insertion hole; and at least one internal thread hole disposed adjacent to said light source insertion hole and arranged at a position different from that of said boss, said cover member, being shaped so as to cover the entire surface of the bottom of said base, includes: a cover portion having a grating adjustment window for adjusting said grating and an inclination adjustment window for adjusting an inclination of said actuator; and a light source supporting portion having a light source contact portion that has a cylindrical concave shape and that comes in contact with a portion protruded from said light source insertion hole of said laser light source, a light source penetration hole that is formed on said light source contact portion and through which wires of said laser light source pass, a boss hole through which said boss passes, and a bolt hole overlapping with said internal thread hole, and said cover member is mounted by engaging said boss with said boss hole, by engaging said light source contact portion with said portion protruded from said light source insertion hole of said laser light source, and by passing a bolt through said bolt hole to screw in said internal thread hole.