Mitsuba Corporation

Yuichi Nagase

Yoshichika Kawashima

Teppei Tokizaki

Seiji Shioiri

Tetsuya Furutatsu

An electric motor equipped with deceleration device () is provided with a main shaft component () that is formed substantially in a circular rod shape, and has one end portion () that is rotatably supported at a substantial center of a bottom portion () of a motor housing () and another end portion () that protrudes towards an outer side through an aperture in the motor housing (), the main shaft component () is fixed to the motor housing () via the one end portion (). An armature () is disposed inside the motor housing () so as to be on the same axis as the main shaft component () and so as to surround the main shaft component (), and a deceleration device () is disposed between the armature () and the other end portion () of the main shaft component () so as to surround the main shaft component (), and an output component (), which is formed in a toroidal shape, is disposed on the same axis as the main shaft component () so as to surround the main shaft component ().

Electric motor equipped with deceleration device

An improved printed circuit board which can reduce or eliminate unsatisfactory soldering caused by trapped gas in surface mounting electronic components by flow soldering is disclosed. According to the invention, the printed circuit board comprises an electrically conductive pattern having a plurality of connection pads to which leads of electronic components are to be connected; and a solder resist layer formed over said electrically conductive pattern and having a plurality of windows which expose said connection pads, wherein at least one of said windows has an extension exposing an additional part of said pad, said extension being substantially narrower than said window. The extension allows the additionally exposed part of the pad to contact with the solder even when the associated pad is almost entirely covered by the trapped gas, so that the solder is pulled to the pad and spread over the pad. Because the extension require a small area, it is effective even when the components are mounted at a high density.

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Kiryu, Japan

Yuichi Nagase