Sanyo Electric Co., Ltd.

Hideyuki Saikawa

Chikashi Yoshinaga

Hiroyuki Negishi

Hisayuki Ito

A fixture plate is fixed by a screw onto an optical housing of the optical head device at a portion corresponding to where a monitor signal path portion and an act signal path portion are arranged overlapping one another. The two signal path portions are portions of two types of signal paths discretely formed on a flexible wiring board. The fixture plate is composed of a conductive material. One of the monitor signal path portion and the act signal path portion is covered by the fixture plate and fixed by a screw onto the optical housing together with the fixture plate, while the other of the monitor signal path portion and the act signal path portion is hooked in place by a hook provided on the fixture plate. The fixture plate is interposed between the monitor signal path portion and the act signal path portion.

Wiring layout structure for optical head device

A laser driving integrated circuit () to drive a laser element is mounted in an optical housing, and a wiring pattern of an actuator line () for supplying an actuator () with drive signals to drive the actuator () through a relay circuit board and a wiring pattern of a laser drive line () for supplying drive signals from the laser driving integrated circuit () to the laser element are formed on the same flexible wiring board (), and, when the flexible wiring board () is folded, a shielding part () connected to the ground line is arranged to intervene between the overlapping wiring patterns of the actuator line () and the laser drive line () of the flexible wiring board ().

Growing community of inventors

Ora-gun, Japan

Hideyuki Saikawa