CPC H02K 1/143 (2013.01) [G04C 3/14 (2013.01); H02K 15/022 (2013.01); H02K 37/16 (2013.01); G04C 3/12 (2013.01)] | 9 Claims |
1. A stator for a timepiece movement, comprising:
a stator plate having a first surface and a second surface opposite to the first surface, wherein the stator plate is made with magnetic material and has a circular hole for holding a rotor in the circular hole; and
two non-magnetic regions formed around the circular hole at a 180-degree interval between the circular hole and respective peripheries of the stator plate adjacent to the circular hole, wherein the two non-magnetic regions include chromium at a weight ratio of 15 wt % or more that is heat-diffused into the stator plate from the first surface of the stator plate in such a manner that the two non-magnetic regions each have a width that becomes progressively narrower from the first surface of the stator plate toward the second surface thereof, wherein the two non-magnetic regions each have a chromium bulge protruding from the first surface of the stator plate.
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