Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-08-08
1995-12-05
Wong, Peter S.
Electrical generator or motor structure
Dynamoelectric
Rotary
310254, 29607, H02K 2126
Patent
active
054732107
ABSTRACT:
A stator for miniature motors having a permanent magnet fixedly fitted to the inner circumferential surface of a housing formed into a bottomed hollow cylindrical shape, in which the circumferential surface of the housing consists of two opposing flat parts and two concave cylindrical surfaces; engaging projections are provided on the flat parts, and flat surfaces coming in contact with said flat parts, and engaging surfaces facing coming in contact with the engaging projections are provided on the axial edge of the permanent magnet made of a flexible ferromagnetic material, and formed into an arc-segment shape in cross section; and the permanent magnet is fixedly fitted in the housing by bringing the arc-segment-shaped outer circumferential surfaces of the permanent magnet in contact with the cylindrical surfaces of the housing, and bringing the flat surfaces on the axial edges of the permanent magnet in contact with the flat parts by causing the engaging projections to cut into the engaging surfaces by the plastic deformation of the engaging projections in a state where the permanent magnet is inserted into the housing.
REFERENCES:
patent: 4636107 (1987-01-01), Casler et al.
patent: 4745319 (1988-05-01), Tomite et al.
patent: 4795932 (1989-01-01), Long
patent: 4933582 (1990-06-01), Hata et al.
Ebashi Kenichi
Hiromasa Kunio
Ichikawa Katsuyuki
Katayama Katsuhiko
Someya Ryouichi
Mabuchi Motor Co. Ltd.
To E.
Wong Peter S.
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