A stepping motor includes a magnet ring 1 whose outer peripheral surface is circumferentially divided to form radial protrusions and recesses and whose outer peripheral surface consists of a cylindrical permanent magnet magnetized to the same polarity, first and second cylindrical coils 2 and 3, a first outer magnetic pole portion 8 excited by the first coil, a second outer magnetic pole portion 9 excited by the second coil, and an output shaft 10 formed of a soft magnetic material and fixed to ...

A stepping exerciser has a pair of treadles pivoted to a front end of a frame body. A rod is fixed to the front end of each treadle and extends downward. The lower ends of the rods are coupled together by a pair of link rods and a lever. A pair of cylinders are coupled between the frame body and the rods. One of the treadles is rotated upwards when the other treadle is depressed downwards by a user so that the user may simulate stepping or climbing a ladder.

In a stepping motor in which a cylindrical magnet 3 which is magnetized in an axial direction is coupled with a rotary shaft and said magnet is clamped with rotor stacks 4, 5 formed by laminating annular magnetic plates the surfaces of which are electrically insulated to form a rotor, and around the outer circumference of the rotor stator cores which are wound with stator coil are disposed, a sleeve 15 is pressed in between the magnet 3 and the rotor stacks 4, 5, and the rotary shaft and interpo...

A small-sized stepping motor provided with can-type stator yokes and one flat-type stator yoke, all of which are injection molded of a composite powder (i.e., a mixture of a metal powder of a soft magnetic material, a powder of a thermoplastic synthetic resin). The injection molded stator yokes have a considerably large specific electrical resistance, and the stepping motor is free from various disadvantages resulting from a small specific electric resistance.

A stepping motor includes a housing, a rotor and a stator received in the housing. The stator includes a yoke, which includes a frame portion surrounding the rotor and a plurality of projections projecting from the frame portion toward the rotor, cylindrical magnetizing coils inserted around the projections, respectively. Each of the magnetizing coils is adapted to receive supply of a pulse current, wherein an inner wall of the housing is formed with concaved portions to receive said magnetizing...

A stepping motor includes a pair of drive coils arranged to sandwich a magnetic rotor in the axial direction of a rotor shaft in order to decrease the motor size. The drive coils are configured to be annular around the rotor shaft that extends in both directions from the magnetic rotor. A pair of cylindrical yokes are provided to enclose the drive coils. A pair of sintered bearings that support the rotational movement of the rotor shaft are made of a magnetic material, and the cylindrical yokes ...

A rear casing (inner casing) 50 that fits into a front casing (outer casing) 40, where a stator 20 is held between these casings 40 and 50. The front casing 40 and the casing [SIC] 50 are rigidly adhered to each other through caulking, adhesives, or welding. Furthermore, the elastic parts 46 that provide an elastic force on the stator 20 towards the rear casing 50 at the step part 43 of the front casing 40, where the stator 20 is press fitted, and the restorative force of the elastic pieces 46 s...

A stepping motor includes: a stator having main magnetic poles each having small stator teeth on its tip, a core-back portion that connects outer portions of the poles, and windings wound around the poles; and two sets of rotor units that are arranged in an axial direction and face the stator with an air gap therebetween. Each rotor unit consists of two rotor cores that are separated in the axial direction and a magnet sandwiched thereby and magnetized in the axial direction. Each rotor core has...

A stepping motor having a shaft with a magnet fixed coaxially thereon, a pair of bobbins of soft magnetic material fixed along the shaft at opposite ends of the magnets, A-phase and B-phase coils wound around the bobbins, yokes having bottom plate portions fixed to the end portion of each of the bobbins on the magnet side and having short pole teeth facing part of the outer peripheral surface of the magnet, long pole teeth of soft magnetic material having one end releasably connected to an end p...

A stepping motor comprises a stator core, a drive coil which is attached to the stator core and a terminal block having a plurality of terminal pins to be wound with the terminals of the drive coil windings. The stator core and terminal block have respective fitting parts. The fitting part of the terminal block is fitted to the fitting part of the stator core. A gap is provided between the terminal block and the drive coil.