Pioneer Electronic Corporation

Takahiro Miyagi

Yoshifumi Masunaga

Shigeru Takaya

Shogo Sato

Yoshihiro Ichikawa

Satoru Anada

Atsushi Iitsuka

Takehiro Matsuda

There is provided an objective lens driving device, wherein a lens holder for holding an objective lens and a coil unit is connected with and floatingly supported by a base block using a plurality of elongate flexible metal members. The objective lens driving device is formed by positioning a plurality of elongate flexible metal members at the predetermined positions with respect to the lens holder and the base block which are to be formed, forming the lens holder integrally connected with one end of each elongate flexible metal member, forming the base block integrally connected with the other end of each elongate flexible metal member, attaching the objective lens and the coil unit in the lens holder.

Objective lens driving device and a method for manufacturing the same

An optical pickup magneto-optically records information on a magneto optical disc in cooperation with a magnetic head. The optical pickup is disposed at one surface side of the magneto optical disc while the magnetic head is disposed at the other surface side of the magneto optical disc during a recording operation of the magneto optical disc. The optical pickup is provided with: a light emission device for emitting a light beam; an optical system for guiding the emitted light beam; an objective lens for converging and focusing the guided light beam onto the optical disc; and an actuator holding the objective lens and having a magnetic circuit for actuating the objective lens to move in focusing and tracking directions respectively of the magneto optical disc by a magnetic force generated by the magnetic circuit. The magnetic circuit includes a magnetic flux generation device for generating a magnetic flux and a yoke for transmitting the generated magnetic flux in the magnetic circuit to generate the magnetic force. The optical pickup is further provided with: a base plate, to which the actuator is attached, having a wall portion prescribing an aperture through which the light beam passing the objective lens is transmitted; and a body case having a wall prescribing an internal space and an opening, which opens toward the magneto optical disc and which is covered by the base plate, for accommodating the light emission device, the optical system and the magnetic circuit.

Optical pickup for magneto optical recording apparatus

An optical pickup device includes an objective lens assembly including an objective lens facing a surface of an optical disk, an actuator base supporting the objective lens to be movable, and a body in which an optical element is accommodated, the actuator base being supported by the body to be slidable. The actuator base is provided with a first flat portion positioned in a vicinity of the optical disk surface and a second flat portion apart from the optical disk surface, the first and second flat portions being formed with first and second protruded pieces having spherical end surfaces, and the body is formed with first and second receiving portions against which the first and second protruded pieces abut, respectively. The optical body is composed of a first supporting portion for supporting the first flat portion, a second supporting portion for supporting the second flat portion and an intermediate portion disposed below the first flat portion.

Pickup device for otpical disk

A cartridge of write and read type or a cartridge of read only type is selectively loaded to a recording and reproducing apparatus. The recording and reproducing apparatus is provided with: a magnetic head for applying a magnetic field; a head movement device for moving the magnetic head between a near position and a far position; a switching lever, which is movable between a non-regulating position to allow the magnetic head to move between the near position and the far position, and a regulating position to regulate the position of the magnetic head at the far position; and a slide plate disposed movably on a cartridge holder and having a protruded portion which is opposed to the cartridge stored in the cartridge holder. The protruded portion abuts to the loaded cartridge to move the slide plate, and the switching lever is positioned at the non-regulating position by abutting to the moved slide plate if the loaded cartridge is the write and read type. The protruded portion is engaged with a judgement recess of the cartridge, and the switching lever is positioned at the regulating position if the loaded cartridge is the read only type.

Growing community of inventors

Tokorozawa, Japan

Takahiro Miyagi