Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Akio Ando

Hiroshi Murakami

Yuichi Yoshikawa

Koji Kuyama

Taro Kishibe

Hideharu Hiwaki

Yuichi Tanabe

Kouji Kuyama

Shigenori Uda

Mikio Hirano

Shuichi Yamane

Masashi Senoo

Yuko Otani

In a stator core having 'N' slots, a tooth-width centerline of a linear yoke and a first extension line extended horizontally from a center of rotary shaft toward the linear yoke form a first angle. Assume there are first point on the first extension line at a first distance from the center, a second extension line drawn at a second distance horizontally from the center toward the linear yoke and extended vertically toward arc-shaped yokes, and a third extension line drawn from the center toward teeth ends of the linear yokes with angle 'K'. The second and third extension line intersect at a second point. A line between the first and second points intersects with the first extension line, thereby forming the first angle. In this structure, 0&#x3c;a&#x3c;b, and (360/2N&#x2212;60/2N)&#xb0;&#x3c;K&#x3c;(360/2N+60/2N)&#xb0; are established, where &#x201c;a&#x201d;, &#x201c;b&#x201d; are the first and the second distances respectively.

Electrical machine having a flattened stator with inclined teeth

A turntable device includes a disc base on the circumference thereof, and the disc base has a hardness more than a given level. The surface of the disc base is roughened at a given level in order to prevent the disc from slipping and adhesion to the disc base. The disc base can compensate surface wobble caused by the disc base. A manufacturing method of the turntable device includes the steps of: a) dripping liquid resin mixed with fine particles on the circumference of the turntable; and b) hardening the resin to form the disc base. The turntable device is good for e.g. CD players, optical disc driving apparatuses.

Turntable device and manufacturing method thereof

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Tottori, Japan

Akio Ando