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US 4,731,555 AGranted
Lead wire layout in coil units for stepping motor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKoichi Torimoto, Hiroaki Takada
Life of this patent
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Abstract
A pair of annular coil units for a stepping motor in which each of the coil units has three coil terminals and the ends of the lead wires connected thereto encapsulated by a synthetic resin thereby forming outwardly extending projections. Recesses are found between the projections so that the lead wires of one of the coil units can be laid out in the recesses between the terminals of the other coil unit.
Claims4
A motor comprising:
- a rotor including a permanent magnet;
- at least two stator sections comprising first and second annular coil units and yokes juxtaposed along an axial direction of and located around said rotor;
- and
- at least two lead wires for each of said stator sections extending along said axial direction radially exterior to a respective one of said annular coil units wherein said one of said annual coil units comprises;
- a bobbin;
- a coil wound on said bobbin;
- at least two terminals, each connected at one end to said coil and at another end to a respective one of said lead wires;
- and
- a synthetic resin member encapsulating said coil, said terminals and the ends of the lead wires connected thereto and forming at least two projections extending radially outwardly from said coil and having a circumferential recess between said projections;
- and
- wherein at least one of said lead wires from the other coil unit is disposed in an axial direction within said recess of said one coil unit.
8 more elements
Dependencies are inferred from the claim text.