Abstract: The present invention relates to a mover for a linear oscillatory actuator to be linearly reciprocated, which is easy to assemble and manufacture and has improved durability. In a mover according to the present invention, permanent magnets and cores which have corresponding shapes are alternately arranged with each other, and this arranged state is fixed by virtue of fastening means. In another mover according to the present invention, plate-shaped cores are stacked one upon another, permanent magnets are inserted into insertion holes defined in the plate-shaped cores, and this inserted state is fixed by virtue of fastening means.

Abstract: A method for manufacturing a core of a motor for washing machines. In the manufacturing method, a pair of core bands are formed by punching the electric steel plate so that both core bands are opposite to each other in orientation and the teeth of one core band alternate with the corresponding teeth of the other core band, the core band is wound to a designated height so as to form a ring-shaped core, and securing parts are welded to the inner cylindrical surface of the ring-shaped core so as to be connected to a washing tub by bolts. The manufacturing method of the present invention is simply accomplished, allows the electrical steel plate to be maximally utilized, and improves a degree of strength of the core.

Abstract: Disclosed are a unit core and a method manufacturing the same. The unit core is opposite to the neighboring unit core on an electric steel plate in orientation, and its unit yoke has an elongated end extending from a central line connecting a center of a tooth to a center of a core formed by interconnecting a plurality of the unit cores, to be opposite to the elongated end of the unit yoke of the neighboring unit core in orientation. This arrangement of the unit cores on the electric steel plate reduces a size of a scrap remaining after the unit cores are punched from the electric steel plate, thereby reducing the production cost of the unit core.

Abstract: A suction head of a vacuum cleaner with a power brush to dislodge and remove debris from an object to be cleaned is provided. The suction head includes a head case connected to a cleaner body via a connecting tube and having a suction hold on a lower surface thereof, a power brush positioned in the head externally protruding from the head case through the suction hole allowing contact with an object to be cleaned, a supporting unit fixed in the head case for supporting the power brush to allow rotary and linear movements thereof, a rotary operating unit positioned between the supporting unit and the power brush for rotating the power brush, and a linear operating unit installed between the supporting unit and power brush for moving the power brushing linearly. With such structure, the size of the suction head is reduced and cleaning performance is improved.

Abstract: Disclosed is a method manufacturing a unit core. The unit core is opposite to the neighboring unit core on an electric steel plate in orientation, and its unit yoke has an elongated end extending from a central line connecting a center of a tooth to a center of a core formed by interconnecting a plurality of the unit cores, to be opposite to the elongated end of the unit yoke of the neighboring unit core in orientation. This arrangement of the unit cores on the electric steel plate reduces a size of a scrap remaining after the unit cores are punched from the electric steel plate, thereby reducing the production cost of the unit core.

Abstract: Disclosed is a method for manufacturing a core of a motor for washing machines. In the manufacturing method, a pair of core bands are formed by punching the electric steel plate so that both core bands are opposite to each other in orientation and the teeth of one core band alternate with the corresponding teeth of the other core band, the core band is wound to a designated height so as to form a ring-shaped core, and securing parts are welded to the inner cylindrical surface of the ring-shaped core so as to be connected to a washing tub by bolts. The manufacturing method of the present invention is simply accomplished, allows the electrical steel plate to be maximally utilized, and improves a degree of strength of the core.

Abstract: Disclosed are a unit core and a method manufacturing the same. The unit core is opposite to the neighboring unit core on an electric steel plate in orientation, and its unit yoke has an elongated end extending from a central line connecting a center of a tooth to a center of a core formed by interconnecting a plurality of the unit cores, to be opposite to the elongated end of the unit yoke of the neighboring unit core in orientation. This arrangement of the unit cores on the electric steel plate reduces a size of a scrap remaining after the unit cores are punched from the electric steel plate, thereby reducing the production cost of the unit core.

Abstract: A motor having two degrees of free motion includes: a motor casing; a combined core of cylindrical shape having a plurality of inner teeth inside and a plurality of outer teeth outside and fixedly coupled inside the motor casing; a first coil winding wound on the inner teeth of the combined core; a second coil winding coil wound on the outer teeth of the combined core; a rotating armature having a permanent magnet inside inserted inside the combined core and rotated by an interaction of a magnetic flux formed by the first coil winding and the permanent magnet; a linear armature located at one side of the second coil winding undergoing a linear movement by the flux formed by the second coil winding; a driving shaft penetratingly coupled to the rotating armature and to the linear armature and undergoing rotating and linear movements therewith; and a spring urging the linear armature away from the combined core.

Abstract: A suction head of a vacuum cleaner with a power brush to suck foreign materials from a cleaning object being rotary abutted to the cleaning object, includes a head case connected with a cleaner body by a connecting tube having a suction hole on a lower surface, a power brush positioned in the head case and protruded toward the outside of the head case through the suction hole thus to be abutted to a cleaning object, a supporting unit fixed in the head case, for supporting the power brush to be capable of performing rotary and linear movements, a rotary operating unit installed between the supporting unit and power brush in the power brush, for rotary operating the power brush and a linear operating unit installed between the supporting unit and power brush in the power brush, for moving the power brush linearly. With the composition, the present invention can reduce the size of the suction head and improve cleaning performance by improving foreign material separating function from the cleaning object.

Abstract: A motor having two degrees of free motion includes: a motor casing; a combined core of cylindrical shape having a plurality of inner teeth inside and a plurality of outer teeth outside and fixedly coupled inside the motor casing; a first coil winding wound on the inner teeth of the combined core; a second coil winding coil wound on the outer teeth of the combined core; a rotating armature having a permanent magnet inside inserted inside the combined core and rotated by an interaction of a magnetic flux formed by the first coil winding and the permanent magnet; a linear armature located at one side of the second coil winding undergoing a linear movement by the flux formed by the second coil winding; a driving shaft penetratingly coupled to the rotating armature and to the linear armature and undergoing rotating and linear movements therewith; and a spring urging the linear armature away from the combined core.