Abstract: A claw-pole-type stepping motor includes a stator annularly disposed therein and having a coil, a rotor rotatably disposed inside the stator and having a multiply magnetized permanent magnet and a shaft, an outer yoke provided in the stator and having a cup shape opening toward an axially outside direction an outer circumferential portion provided in the outer yoke and having a cylindrical shape and an inner circumferential portion including first pole teeth, an inner yoke provided in the stator and having second pole teeth provided in an inner circumference thereof and an outer circumferential portion fixed to an inner circumferential surface of the outer circumferential portion of the outer yoke, in which the first pole teeth and the second pole teeth are engaging with each other via a gap in an axial direction and are disposed with respect to the permanent magnet of the rotor via a gap, a fixed portion of the inner yoke and the outer yoke is positioned at the axial inside of an opening end of the cup shape

Abstract: A motor includes a stator having boss portions on an end plate thereof, a front plate provided on an upper surface of the stator, and a band connecting the stator and the front plate. Recess portions are formed adjacent to an outer peripheral edge of the front plate, and a protruding portion is provided in each recess portion. The band has a bottom plate part and attachment parts. The bottom plate part includes notched portions. Each attachment part includes an engagement portion at a tip end thereof which includes a notched portion. The notched portions of the bottom plate part are fitted with the boss portions of the end plate, and the notched portions of the engagement portions are fitted with the protruding portions of the front plate to form engagement hooks at most tip ends of the engagement portions, respectively, thereby connecting the stator and the front plate.

Abstract: It is an object of this invention to provide a motor with a structure including a bearing only on one side whose assembly accuracy can be easily increased. In a stepping motor including a shaft as a rotating shaft of a rotor and a bearing which rotatably supports the shaft, the bearing is provided only on one side of the shaft, and a one-piece molded member is provided, the one-piece molded member obtained by integrally molding, from resin, the bearing and at least one on the bearing side of a front plate and an end plate.

Abstract: A stepping motor includes: a cylindrical rotor assembly disposed around the rotation axis; a stator assembly including two stator units disposed around the rotor assembly and axially coupled to each other; and a terminal structure disposed at the axial center of the outer circumference of the stator assembly. The terminal structure includes: a terminal block cluster composed of four terminal blocks; and four terminals fixed respectively to the four terminal blocks. The four terminals each include: an internal connection portion to which one of two wire ends of the winding is connected; and an external connection portion which is disposed substantially parallel to the internal connection portion and which is connected to a driving circuit disposed externally. The four terminals are arranged in a line along a direction substantially orthogonal to the rotation axis, and the internal connection portion and the external connection portion are aligned along the rotation axis.

Abstract: A claw-pole-type stepping motor includes a stator annularly disposed therein and having a coil, a rotor rotatably disposed inside the stator and having a multiply magnetized permanent magnet and a shaft, an outer yoke provided in the stator and having a cup shape opening toward an axially outside direction an outer circumferential portion provided in the outer yoke and having a cylindrical shape and an inner circumferential portion including first pole teeth, an inner yoke provided in the stator and having second pole teeth provided in an inner circumference thereof and an outer circumferential portion fixed to an inner circumferential surface of the outer circumferential portion of the outer yoke, in which the first pole teeth and the second pole teeth are engaging with each other via a gap in an axial direction and are disposed with respect to the permanent magnet of the rotor via a gap, a fixed portion of the inner yoke and the outer yoke is positioned at the axial inside of an opening end of the cup shape

Abstract: A motor includes a stator having boss portions on an end plate thereof, a front plate provided on an upper surface of the stator, and a band connecting the stator and the front plate. Recess portions are formed adjacent to an outer peripheral edge of the front plate, and a protruding portion is provided in each recess portion. The band has a bottom plate part and attachment parts. The bottom plate part includes notched portions. Each attachment part includes an engagement portion at a tip end thereof which includes a notched portion. The notched portions of the bottom plate part are fitted with the boss portions of the end plate, and the notched portions of the engagement portions are fitted with the protruding portions of the front plate to form engagement hooks at most tip ends of the engagement portions, respectively, thereby connecting the stator and the front plate.

Abstract: A stepping motor includes: a cylindrical rotor assembly disposed around the rotation axis; a stator assembly including two stator units disposed around the rotor assembly and axially coupled to each other; and a terminal structure disposed at the axial center of the outer circumference of the stator assembly. The terminal structure includes: a terminal block cluster composed of four terminal blocks; and four terminals fixed respectively to the four terminal blocks. The four terminals each include: an internal connection portion to which one of two wire ends of the winding is connected; and an external connection portion which is disposed substantially parallel to the internal connection portion and which is connected to a driving circuit disposed externally. The four terminals are arranged in a line along a direction substantially orthogonal to the rotation axis, and the internal connection portion and the external connection portion are aligned along the rotation axis.