US 5,057,732 A · Electric motor having a molded housing and connector plates projected thereon

Abstract

A stator coil used in an electric motor, including a bobbin formed by insulating material and composed of a hollow cylindrical portion and two end plates provided projectingly toward the outside in the radial direction from the cylindrical portion at both ends in the axial direction thereof, at least two connector plates made of conductive material of which one end is inserted into an outer periphery of one end plate of the bobbin and of which the other end is extended outside in the radial direction of the end plate, and an exciting coil wound on the cylindrical portion. One terminal portion of a covered wire which constitutes the exciting coil is conductively connected to the one connector plate, and the other terminal portion is conductively connected to the other connector plate. The connector plates are insulatingly held in a housing of the electric motor and their free ends are provided projectingly outside the outer surface of the housing, thereby forming a connector.

Claims9

Dependent claims

An electric motor comprising:

a housing;
a stator disposed fixedly in said housing including a coil bobbin formed in a hollow cylindrical shape by insulating material, an exciting coil wound on said coil bobbin, and at least two connector plates made of conductive material and fixed to said coil bobbin at one end thereof at a position apart from said exciting coil, provided projectingly toward the outside in the direction perpendicular to the center axis of said coil bobbin, and extended in parallel with each other;
a rotor rotatably supported in said housing and positioned concentrically to said stator;
wherein
both ends of the coil wire which forms said exciting coil wound on said coil bobbin of said stator being conductively fixed to respective one of said connector plates fixed to said coil bobbin;
said housing is molded by insulating hard synthetic resin on the outer surface of said stator;
and
free end portions of said connector plates are made to project outside the outer surface of said housing and insulatingly held by said housing to form a male connector for being supplied with a current from an electric power source.

5 more elements

A stepping motor comprising:

a housing;
a stator disposed fixedly in said housing including, a coil bobbin formed in a hollow cylindrical shape by insulating material, an exciting coil wound on said coil bobbin, at least two connector plates made of conductive material and fixed to said coil bobbin at one end thereof at a position apart from said exciting coil and extended in parallel with each other, and a case made of soft magnetic material covering outer and inner circumferences of said bobbin and provided with pawl-type magnetic poles formed at the portion opposed to the inner circumferential surface of said exciting coil;
a rotor rotatably supported in said housing and positioned concentrically to said stator and provided with a multipolarly magnetized permanent magnet positioned oppositely to pawl-type magnetic poles of said stator on an outer circumferential plane thereof, wherein
both ends of a coil wire which forms said exciting coil wound on said coil bobbin of said stator are conductively fixed to respective one of said connector plates fixed to said coil bobbin, respectively;
said housing is molded by insulating hard synthetic resin on the outer circumference of said case;
and
free end portions of said connector plates are made to project outside the outer surface of said housing and insulatingly held by said housing, respectively, to form a male connector for being supplied with a current from an electric power source.

4 more elements

Dependencies are inferred from the claim text.

Electric motor having a molded housing and connector plates projected thereon

Life of this patent

Electric motor having a molded housing and connector plates projected thereon

Life of this patent

Abstract

Claims9