Sanyo Electric Co., Ltd.

Shunichi Morimoto

Kenichi Imai

Shingo Matsuzaki

Noboru Tajiri

Mitsuhiko Uchida

Provided is a compact-type objective lens (OBL) holder and the like provided with a bobbin making it possible to appropriately wind a coil therearound. An OBL holder of the present invention includes: a main surface portion provided with a fixing part on which an objective lens is fixed; and a first side-wall portion and a second side-wall portion provided with bobbins around which tracking coils for driving the OBL holder itself by using a magnetic effect are wound. Further, in the present invention, each bobbin includes a tubular portion and a through-hole penetrating the tubular portion in a thickness direction thereof. Thus, an adhesive can be supplied to the tracking coil through the through-hole.

Objective lens holder, objective lens driving device using the same, optical pickup device, and method for manufacturing objective lens driving device

Provided are an objective lens driving device capable of strengthening the effective magnetic fluxes of the magnets while preventing increases in size and costs of the device; and an optical pickup apparatus including the same. The objective lens driving device of the invention includes an actuator frame for movably supporting an OBL holder. Four tracking coils are attached to sidewalls of the OBL holder, and four magnets are attached to the back yokes of the actuator frame to be opposed to the tracking coils, respectively. In addition, two of the tracking coils are placed tilting to one of the sidewalls of the OBL holder.

Objective lens driving device and optical pickup apparatus including the same

A mounting structure of a magnetic member at least includes: a magnetic member; a magnetic coupling member mounted with the magnetic member; and an adhesive member bonding the magnetic member to the magnetic coupling member, either one or both of the magnetic member and the magnetic coupling member provided with an adhesion securing portion configured to secure adhesive strength, either one or both of the magnetic member and the magnetic coupling member provided with an adhesive member reservoir portion configured to lead the adhesive member to the adhesion securing portion.

Mounting structure of magnetic member, method of bonding magnetic member and magnetic coupling member, pickup unit, and disc apparatus

A holding member provided with a coil comprising a proximity facilitating portion capable of bringing the coil closer to a magnetic member facing the coil.

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Ota, Japan

Shunichi Morimoto