Nidec Copal Corporation

Matsushita Electric Industrial Co., Ltd.

Ryuta Yamawaki

Yoshinori Katada

Hideki Nakata

Hideki Aikoh

Hironori Tomita

Yoshihide Tonogai

Masayuki Shiwa

Noboru Segawa

Shin Odajima

Tomoaki Hoshina

Mitsuru Yanagisawa

A vibration actuator includes a coil that extends in a vibration direction and has a flat shape and a magnet that extends in the vibration direction and has a flat shape, so that a case can be made flat or low profile. A weight portion is supported by a shaft, so that, when a drop impact is applied, the weight portion can move along the shaft and the weight portion is not freely moved in the case. A coil spring is disposed between a spring receiving portion and a weight portion. Therefore there is no unnecessary space in the case, so that space can be saved and the vibration actuator can be made compact.

Vibration actuator

A housingof a stepping motorconsists of a pair of case sectionsarranged in front and rear in the direction of an axial line L of a rotating shaft. The case sectionsare formed of: an end plateto which a bearingfor supporting the rotating shaftis fixed, and a base plateand a top plateextending from the end platein the direction of axial line L of the rotating shaft. The case sectionsare formed by bending a single plate material.

Stepping motor

Small-sized motor

Growing community of inventors

Kawaguchi, Japan

Ryuta Yamawaki