Sony Corporation

Hitoshi Taniguchi

Kiyoshi Omori

Hiroshi Kawashima

Kazuya Sunami

Masazumi Shiozawa

Hidehiko Yamamoto

Takashi Aoyama

Hiroyuki Suzuki

Toru Tanaka

Shigeo Araki

Hidekazu Seto

Tomoki Kawabata

Takaaki Komatsu

Keisuke Ishio

The present invention relates to a disc drive apparatus capable of preventing skew or wobble from occurring when a spindle motor is attached to a base. The disc drive apparatus according to the present invention comprises: a turntablewhich holds an optical disc; a spindle motor which rotatively drives the turntable; an optical pick-upwhich writes/reads signals on or from the optical disc; guide shaftsandwhich slidably supports the optical pick-upin the radial direction of the optical disc, and a baseto which a spindle motorand both end portions of each of the guide shaftsand, wherein the spindle motoris attached to the basethrough a spacer memberwhich performs positioning of the turntablein the vertical direction thereof relative to the base

Disc drive apparatus

A disk recorder/player () including a skew adjusting means of a thin design is provided which includes a base (), a disk rotation driving mechanism () for an optical disk (), an optical pickup (), first and second guide shafts () to support the optical pickup () at opposite ends of the latter, an optical pickup moving means () guided by the first and second guide shafts () in moving the optical pickup () radially of the optical disk (), an elastic member () put in contact with the first and second guide shafts () to force the first and second guide shafts () in a direction generally perpendicular to the main side of the optical disk (), an adjusting screw () put into contact with the first and second guide shafts () from the opposite side of the elastic member () to move the first and second guide shafts () in a direction opposite to the direction of forcing by the elastic member (), and a skew adjusting means () which adjusts a skew, if any, by adjusting the inclination of the first and second guide shafts () by the adjusting screw ().

Recording and/or playback device

The hard disk apparatus has first and second skew adjust members and for adjusting inclinations or an inclination of a main guide shaft and/or a sub-guide shaft . The first and second skew adjust members comprise: bearing parts or a bearing part provided such that the centers or center of shaft holes or a shaft hole in which ends or an end of a main guide shaft and/or a sub-guide shaft is inserted and supported is deviated from the centers or center of end surfaces or an end surface of the main guide shaft and/or a sub-guide shaft , the end surfaces or end surface being substantially perpendicular to the axial directions or axial direction of the main guide shaft and/or the sub-guide shaft ; and first, second, and third contact surfaces A, B, and C that are brought into contact with a support base , the first, second, and third contact surfaces forming a substantially rectangular outer circumference.

Skew adjustment for disk drive apparatus

A magnetic disc drive apparatus in which a magnetic disc rotating section and a head arm having a magnetic head are accommodated within a casing and a main printed circuit board is attached to a bottom surface side of the casing is comprised of an auxiliary printed circuit board having at least a recording/playback amplifier, a playback side frequency characteristic circuit and a playback side pulse shaping circuit and which is accommodated within the casing, the auxiliary printed circuit board being connected to the magnetic head and the main printed circuit board. Thus, recording/reproducing signals can be prevented from being deteriorated by inside or extraneous noise and space for assembly parts on the main printed circuit board can be saved.

Magnetic disc drive apparatus

A static RAM includes a plurality of chips. The chips each comprise a plurality of memory cells for storing data, column-selecting transistors, bit-lines to which the plurality of memory cells and the column-selecting transistors are connected, and a voltage control circuit which can adjust the electrical potential of the bit-lines so as to allow the column-selecting transistors to operate when selecting one of the chips. By use of the voltage control circuit, the static RAM can operate at a high speed when not only address selecting operation but also chip selecting operation is required.

Static random access memory device with pull-down control circuit

The invention provides a static random access memory wherein the peak value of current flow therethrough upon flash-clearing is minimized. The static random access memory comprises a memory cell array which is divided into a plurality of memory cell groups which are driven at mutually different timings for flash-clearing by means of a plurality of delay circuits connected in cascade to which the flash-clearing signal is applied.

Growing community of inventors

Kanagawa, Japan

Hitoshi Taniguchi