System for mounting the coil of the motor in an electric watch
First Claim
1. A system for mounting the coil of the motor in an electric watch wherein the electric watch includes an electric motor for driving the watch, the motor includes a coil on a core and the core has pole pieces, a support for the coil, the support having a respective recess defined therein for a respective extrusion of a pole piece, at least one of the pole pieces of the coil has at least one extrusion which protrudes with respect to the plane of said piece, and the extrusion is of a shape and of dimensions complementary with respect to those of the respective corresponding recess in the support on which the coil is intended to be mounted and the respective recess being placed such that the extrusion can be received in that recess.
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Accused Products
Abstract
A system for fastening the coil of a step-by-step motor in an electric or an electronic watch.
It is characterized by the fact that one or both pole pieces 4 and 4'"'"' of the coil 2 have extrusions 10 and 11 of cylindrical shape which extend perpendicular to the plane of the pole piece 4 and are intended to be introduced into corresponding boreholes in the substrate of the printed circuit 1.
This arrangement is advantageous since the extrusions can be produced by stamping before the heat treatment of the pole pieces, which eliminates the stresses which might, upon the mounting of the coil, destroy the magnetic qualities of the materials.
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Citations
7 Claims
- 1. A system for mounting the coil of the motor in an electric watch wherein the electric watch includes an electric motor for driving the watch, the motor includes a coil on a core and the core has pole pieces, a support for the coil, the support having a respective recess defined therein for a respective extrusion of a pole piece, at least one of the pole pieces of the coil has at least one extrusion which protrudes with respect to the plane of said piece, and the extrusion is of a shape and of dimensions complementary with respect to those of the respective corresponding recess in the support on which the coil is intended to be mounted and the respective recess being placed such that the extrusion can be received in that recess.
Specification