Timepiece device
AssigneeSeiko Epson Corporation
InventorsNobuhiro Koike, Mamoru Miyasaka, Osamu Takahashi
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Abstract
In a generator 120 in an electronic-controlled mechanical timepiece, the winding core 133b of a coil 134 arranged nearer to the perimeter of a base plate 2 is made shorter than the winding core 123b of a coil 124 arranged more inside. Accordingly, it is possible to make the area of an opening 2c can be made smaller in comparison with the prior art, and make the timepiece more small-sized by making smaller the outer diameter of the base plate 2 as keeping the distance D1 between the corner part of the opening 2c and the perimeter of the base plate 2 to the same degree as the prior art and thereby securing the strength of the base plate 2.
Claims68
A timepiece, comprising:
- an electromagnetic transducer for converting one form of energy into another form of energy, the electromagnetic transducer comprising first and second coils having first and second winding cores respectively;
- wherein the second coil is disposed closer to an outer periphery of the timepiece than the first coil, and the first coil has a winding core whose axial length is longer than that of a winding core of the second coil.
The timepiece according to 56, wherein the electromagnetic transducer further comprises a magnetic conducting portion, a part of which is spaced apart from, and planarly overlapped by, a skirt portion provided on an outer circumference of the oscillating weight.
Dependencies are inferred from the claim text.