Stepping Motor
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsKatsuhiko MAKINO, Shinji MURAl
Life of this patent
Estimating the term…
Abstract
A stepping motor includes a stator, a rotor rotatably supported by the stator, and an auxiliary magnetic member. The auxiliary magnetic member has a body, side edge parts at both circumferential ends of the body, and an opening between the side edge parts. The auxiliary magnetic member is elastically mounted around a flange of the stator. The auxiliary magnetic member includes, at one of the side edge parts, a projecting part protruding radially inward from a projected inner circumferential surface of the body across the opening.
Claims18
A stepping motor, comprising:
- a stator, including:
- a bobbin provided with a yoke;
- a coil winding around the bobbin;
- and
- an annular flange having an outer diameter larger than an outer diameter of the coil;
- a rotor, including:
- a rotor shaft rotatably supported by the stator;
- and
- a plurality of magnets arranged around the rotor shaft;
- and
- an auxiliary magnetic member elastically mounted around the flange of the stator, wherein the auxiliary magnetic member includes a body, side edge parts at both circumferential ends of the body , and an opening between the side edge parts, the side edge parts facing each other across the opening, wherein a portion of one of the side edge parts is a projecting part protruding radially inward from a projected inner circumferential surface extended along an inner circumferential surface of the body across the opening.
A stepping motor, comprising:
- a stator, including:
- a bobbin provided with a yoke;
- a coil winding around the bobbin;
- and
- an annular flange having the outer diameter larger than an outer diameter of the coil;
- a rotor, including:
- a rotor shaft rotatably supported by the stator;
- and
- a plurality of magnets arranged around the rotor shaft;
- an auxiliary magnetic member elastically mounted around the flange of the stator, the auxiliary magnetic member having a body, opening edge parts at circumferential ends of the body, and an opening between the opening edge parts, the opening edge parts facing each other across the opening;
- and
- an intervening member interposed between one of the opening edge parts and the flange of the stator.
A stepping motor, comprising:
- a stator having a first flange;
- an auxiliary magnetic member mounted around the first flange, the auxiliary magnetic member having a body with a projected inner circumferential surface extending across an opening at circumferential ends of the auxiliary magnetic member;
- and
- a projection connected to the body of the auxiliary magnetic member,
- wherein at least a portion of the projection is positioned radially inward from the projected inner circumferential surface of the body.
Dependencies are inferred from the claim text.