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US 11,171,554 B2Granted
Stepping motor
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsKatsuhiko Makino, Shinji Murai
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.
Claims20
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 having a central axis, a first end, a second end axially opposite the first end, and an opening extending from the first end to the second end,
- wherein the opening defines side edge parts at both circumferential ends of the body, and
- wherein the opening is positioned between the side edge parts such that the side edge parts face each other across the opening,
- wherein one of the side edge parts comprises a projecting part protruding radially inward from a projected inner circumferential surface extended along an inner circumferential surface of the body across the opening;
- and
- wherein the projecting part extends axially along the corresponding one of the side edge parts from the first end of the to the second end of the body.
15 more elements
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;
- an auxiliary magnetic member elastically mounted around the flange of the stator,
- wherein the auxiliary magnetic member includes:
- a body having a central axis, a first end, a second end axially opposite the first end, and an opening extending from the first end to the second end,
- wherein the opening defines opening edge parts at both circumferential ends of the body, and
- wherein the opening is positioned between the opening edge parts such that the opening edge parts face each other across the opening;
- and
- an intervening member interposed between one of the opening edge parts and the flange of the stator, wherein the intervening member extends along the corresponding one of the opening edge parts from the first end to the second end of the body.
13 more elements
A stepping motor, comprising:
- a stator having a first flange;
- an auxiliary magnetic member mounted around the first flange, wherein the auxiliary magnetic member includes:
- a body having a central axis, a first end, a second end axially opposite the first end, and an opening extending from the first end to the second end,
- wherein the body has a projected inner circumferential surface extending across the opening at circumferential ends of the auxiliary magnetic member;
- and
- a projection connected to the body of the auxiliary magnetic member, wherein the projection extends along the body from the first end to the second end of the body;
- wherein at least a portion of the projection is positioned radially inward from the projected inner circumferential surface of the body.
4 more elements
Dependencies are inferred from the claim text.