A stepping motor having high-precision torque formation and stepping angle is able to be produced at a low cost. Cylindrical elastic magnetic members, which cover a first and second set of yokes and have an inner diameter smaller than the outer diameter of the yokes, readily come in tight contact with the yokes and form strong magnetic circuits. The first and second sets of yokes are integrally formed into a bobbin through a nonmagnetic member. Pole teeth of the first set of yokes and pole teeth...

The invention relates to a stepping motor having at least one electromagnet disposed in a casing, a shaft which is mounted for rotation in the casing and on which is rotationally fixed a rotor which in turn is rotationally fastened to an armature mounted on the shaft for longitudinal sliding and cooperating with the electromagnet, and further having a first ball race concentric to the shaft and fastened to the casing and a second ball race cooperating therewith and mounted for rotation in the ca...

A stepping motor is disclosed for use in imparting to a rotatable member an intermittent step-by-step rotating motion by means of a linearly reciprocating driving member. The driven, rotatable member has a shaft which carries a ratchet wheel and is advanced intermittently by two oppositely positioned pawls, mounted on a reciprocating driving member so that both movements of the driver will rotate the driven member another step. Means are also provided for preventing undesirable rotation of the r...

A stepping drive comprises an input shaft, an output shaft, and a planetary gearing and a crank mechanism mounted therebetween. The planetary gearing is mounted concentrically of the input shaft and includes a fixed central gear and at least one planet gear carried by a secondary shaft which is supported by and rotatably mounted in a planet carrier. The planet gear performs a revolving motion synchronous with a uniform, basic rotary motion of the input shaft and, simultaneously, a rotary motion ...

The present invention relates to a stepping motor. The stepping motor includes a rotor having a cylindrical magnet with a plurality of N-S poles being radially magnetized thereto and a shaft having one end coupled to the center of the magnet and rotationally supported by bearings; at least one coil wound into the shape of a ring at axial sides of the magnet with air gaps; and a stator shaped as a cylinder with a shaft hole in the center for receiving the coil, the stator having an outer yoke whi...

A stepping motor including a rotor having a plurality of magnetic poles, one stator base arranged near the rotor, a pair of magnetic yokes fixed on the stator base and arranged to face the magnetic poles of the rotor, a pair of excitation coils for exciting the pair of magnetic yokes respectively in response to drive pulses which have phase difference, and a pair of stator magnetic polar portions integrally formed with the stator base. The stepping motor is constructed to form magnetic paths tog...

In the stepping motor, in which the stator core 4 is disposed outside the rotor 2 mounted on the rotation shaft, by the bearings 8, 9 mounted on the casings 10, the front and rear portion of the rotation shaft 1 are supported, and the casings 10, 11 are made of a press-molded metal plate. The thin portions 10b, 11b of the casings 10, 11, which are in contact with the stator core 4 support one portion of the outer circumference of the stator core 4. Also, by the alternately folded portions 10c, 1...

A stepping exerciser includes a base frame having a first end portion, a second end portion, a first side wall, and a second side wall. A supporting handle has a lower end portion mounted on the first end portion of the base frame in an inclined manner, and an upper end portion with a handgrip mounted thereon. A driving axle is rotatably mounted on the second end portion of the base frame and has a first end and a second end extending through the first and the second side wall of the base frame ...

A stepping motor having a rotor includes a permanent magnet and a plurality of stators and coils provided around the permanent magnet. The motor also includes a resiliently deformable portion integrally provided with a stator case for biasing the stators toward an output shaft of the motor, whereby the stators are made reliable fixable in the stator case and when the rotor is to be mounted in the stator case, and a lead screw of the output shaft is prevented from being injured.

An exerciser includes a pair of foot pedals pivotally secured to a base at a pivot axle, and a wheel rotatably secured on the upper portion of the base at a pivot shaft. A cable couples the wheel to the foot pedals for allowing the wheel to be rotated by the foot pedals. A post is pivotally secured to the pivot shaft and includes a handle. A pin may selectively secure the post to the wheel for allowing the post to be rotated in concert with the wheel when the pin secures the post to the wheel. A...