Stepping motor having a molded housing

A stepping motor including:

• a stator core which is a laminate of thin steel plates, said stator core having a cylindrical outer peripheral surface and an inner peripheral surface on which are formed a plurality of axially extending ridges and grooves formed alternately in a circumferential direction;
• bobbins formed of an insulating material and held in abutment with at least both axial end faces of said stator core;
• stator coils wound round said ridges from above-said bobbins,
• a first support member formed of an insulating material and fixed to a part of the outer peripheral surface of said stator core, said first support member having an engaging surface for abutment with a first end face out of both axial end faces of the stator core;
• a second support member formed of an insulating material and fixed to a part of the outer peripheral surface of said stator core between an end portion of said first support member and a second end face out of both axial end faces of the stator core;
• a plurality of terminal plates each having a central portion fixed in the interior of said second support member, a first end portion and a second end portion, said first end portion being projected in a radial direction of said stator core, said second end portion being projected axially of the stator core from the outer surface of the second support member and extending along an outer surface of said first support member, with end portions of electric wires which constitute said stator coils being connected to said second end portions of the terminal plates;
• a housing formed by molding of a synthetic resin, said housing covering said outer peripheral surface of said stator core, the outer surface of said first and second support members, further covering said bobbins and stator coils projecting from both axial end faces of the stator core;
• and
• a male connector comprising said first end portions of said terminal plates extending in the radial direction of said stator core from said second support member and being made projected through said housing to an outer peripheral surface of the housing and a socket wall formed integrally with said housing in surrounding relation to said first end portions.