Stepping motor

摘要

PCT No. PCT/JP85/00611 Sec. 371 Date Jul. 8, 1986 Sec. 102(e) Date Jul. 8, 1986 PCT Filed Nov. 5, 1985 PCT Pub. No. WO86/03071 PCT Pub. Date May 22, 1986.Relating to a stepping motor to be used for paper feedings or type head movements in office automation apparatus such as printers or typewriters. A stator (1) is constituted by moulding stator yokes (2), (3), (4), and (5) monolithically by resin with using their inner radius as their reference, and one side of a rotary shaft (11a) of a rotor (11) is supported by a bearing (12a) of a bearing holder member (1a) which is provided on the one-side end plane of a cylinder member of sad stator (1), and at the same time, a bracket (14) holding a bearing (12b) supporting one side of the rotary shaft (11a) of the rotor (11) is inserted into an opening side inner part of said cylinder member. By the above constitution, centering of the rotary shaft can be carried out easily and the gap between the rotor and the inner radius of the stator can be maintained also easily, then as a result of it, low-cost and high-quality stepping motors can be offered.