Abstract: A wheel driving device includes: a motor rotating a shaft: an input gear fixed to the shaft; at least one transmission gear meshed with the input gear to transmit power of the motor; and a final gear meshed with the transmission gear and connected with a wheel via an axis to transmit the power from the transmission gear to the wheel. The wheel driving device includes an extraction gear meshed with the final gear or the transmission gear, and a power transmission part connected with the extraction gear to transmit the power from the extraction gear to a cleaner head.

Abstract: Provided is a suction unit to be provided in an electric vacuum cleaner including an electric blower. The suction unit includes a suction inlet arranged to extend in a longitudinal direction, and arranged opposite to a surface to be cleaned; a connection opening to be connected to the electric blower; a suction passage arranged to extend along a center line joining a middle of the suction inlet in the longitudinal direction and a middle of the connection opening in the longitudinal direction to connect the suction inlet and the connection opening; and a plurality of first partition walls each of which is arranged in the suction passage, and is arranged to extend from a side on which the connection opening is defined to a side on which the suction inlet is defined. The suction passage includes a first main passage and a plurality of first division passages.

Abstract: Provided is a suction unit to be provided in an electric vacuum cleaner including an electric blower. The suction unit includes a suction inlet arranged to extend in a longitudinal direction, and arranged opposite to a surface to be cleaned; a connection opening to be connected to the electric blower; a suction passage arranged to extend along a center line joining a middle of the suction inlet in the longitudinal direction and a middle of the connection opening in the longitudinal direction to connect the suction inlet and the connection opening; and a plurality of first partition walls each of which is arranged in the suction passage, and is arranged to extend from a side on which the connection opening is defined to a side on which the suction inlet is defined. The suction passage includes a first main passage and a plurality of first division passages.

Abstract: A suction nozzle of an electric vacuum cleaner including an electric blower, includes a suction inlet; an outlet; a suction passage extending along a center line joining a middle of the suction inlet in the longitudinal direction and a middle of the outlet in the longitudinal direction to connect the suction inlet and the outlet; and partition walls arranged in the suction passage to extend from the suction inlet side to the outlet side. The suction passage includes a main passage and division passages arranged on both outer sides of the main passage. The main passage and the division passages are divided in the longitudinal direction of the suction inlet by the partition walls. A width of the main passage at the suction inlet measured in the longitudinal direction is arranged to be greater than a width of the main passage at the outlet measured in the longitudinal direction.

Abstract: A wheel driving device includes: a motor rotating a shaft: an input gear fixed to the shaft; at least one transmission gear meshed with the input gear to transmit power of the motor; and a final gear meshed with the transmission gear and connected with a wheel via an axis to transmit the power from the transmission gear to the wheel. The wheel driving device includes an extraction gear meshed with the final gear or the transmission gear, and a power transmission part connected with the extraction gear to transmit the power from the extraction gear to a cleaner head.

Abstract: A motor includes a bearing mechanism, a stationary unit including a stator arranged radially outwards of the bearing mechanism, and a rotary unit supported by the bearing mechanism at the upper side of the stationary unit for rotation about a center axis with respect to the stationary unit. The rotary unit includes a substantially cylindrical closed-top rotor yoke having a cover portion arranged to cover the stator. The bearing mechanism includes a substantially cylindrical closed-bottom bush formed by a press work, a sleeve fixed inside the bush and provided with an upper portion protruding beyond the bush and a shaft inserted into the sleeve. An upper end of the bush is lower than or flush with an upper end of the stator in a direction parallel to the center axis.

Abstract: A motor includes a stationary unit, a bearing mechanism, a rotary unit, and a chucking device. The rotary unit includes a rotor yoke provided with a cover portion extending around the chucking device and designed to allow the storage disk to be directly or indirectly mounted thereto and a removal-preventing member fixed to the cover portion to prevent removal of the rotary unit from the stationary unit. The removal-preventing member made of metal. The removal-preventing member includes a removal-preventing portion, an upper fixing portion having a plurality of upper protrusions inserted into the through-holes of the cover portion and bent toward the upper surface of the cover portion, and a lower fixing portion making direct or indirect contact with the lower surface of the cover portion and cooperating with the upper fixing portion to fix the position of the removal-preventing portion in a direction parallel to the center axis.

Abstract: A motor includes a bearing mechanism, a stationary unit including a stator arranged radially outwards of the bearing mechanism, and a rotary unit supported by the bearing mechanism at the upper side of the stationary unit for rotation about a center axis with respect to the stationary unit. The rotary unit includes a substantially cylindrical closed-top rotor yoke having a cover portion arranged to cover the stator. The bearing mechanism includes a substantially cylindrical closed-bottom bush formed by a press work, a sleeve fixed inside the bush and provided with an upper portion protruding beyond the bush and a shaft inserted into the sleeve. An upper end of the bush is lower than or flush with an upper end of the stator in a direction parallel to the center axis.

Abstract: A motor includes a stationary unit, a bearing mechanism, a rotary unit, and a chucking device. The rotary unit includes a rotor yoke provided with a cover portion extending around the chucking device and designed to allow the storage disk to be directly or indirectly mounted thereto and a removal-preventing member fixed to the cover portion to prevent removal of the rotary unit from the stationary unit. The removal-preventing member made of metal. The removal-preventing member includes a removal-preventing portion, an upper fixing portion having a plurality of upper protrusions inserted into the through-holes of the cover portion and bent toward the upper surface of the cover portion, and a lower fixing portion making direct or indirect contact with the lower surface of the cover portion and cooperating with the upper fixing portion to fix the position of the removal-preventing portion in a direction parallel to the center axis.

Abstract: In a motor, a retaining claw with a slanted surface is arranged around the upper end of a tubular portion of a housing for mounting a rotor. A cylindrical portion is integrally formed in a peripheral area of a rotational axis of a turntable. A retaining member with retaining portions having a J-shaped cross section is attached to the lower surface of the turntable. Arms of the retaining portions are located in the vicinity of the lower end of the cylindrical portion. In mounting the rotor onto the housing, the retaining portions contact the slanted surface and the arms are elastically deformed. Upon completion of the mounting, the arms return to a state before the elastic deformation, so that the retaining claw prevents the rotor from coming off.

Abstract: An inner rotor type motor includes a turn table having a disk loading portion and a central opening portion arranged to allow a disk to be attached thereto and removed therefrom, a rotor concentric with a rotation axis of the turn table, the rotor including a rotor holder having therein a rotor magnet and a cylindrical portion arranged to retain on an outer circumferential surface thereof the rotor magnet, and a stator having an armature arranged to oppose an outer circumferential surface of the rotor magnet via a gap therebetween. The turn table is affixed in an axial direction on an upper portion of the rotor holder, and the disk loading portion is arranged radially outside the cylindrical portion of the rotor holder. A disk loading surface of the disk loading portion is arranged to make contact with the disk, and a bottom portion of the disk loading portion is arranged axially below an area where the turn table and the rotor holder make contact with one another.

Abstract: In a motor, a retaining claw with a slanted surface is arranged around the upper end of a tubular portion of a housing for mounting a rotor. A cylindrical portion is integrally formed in a peripheral area of a rotational axis of a turntable. A retaining member with retaining portions having a J-shaped cross section is attached to the lower surface of the turntable. Arms of the retaining portions are located in the vicinity of the lower end of the cylindrical portion. In mounting the rotor onto the housing, the retaining portions contact the slanted surface and the arms are elastically deformed. Upon completion of the mounting, the arms return to a state before the elastic deformation, so that the retaining claw prevents the rotor from coming off.

Abstract: A motor includes a circuit board having a bottom facing surface and a plurality of connecting land portions provided thereon. The circuit board includes a through hole for allowing a wire to extend therethrough. An attachment board makes contact with the bottom facing surface of the circuit board. The attachment board includes an opening portion penetrating the attachment board. The wire is wound around a stator core arranged above or equal to the circuit board in an axial direction so as to form a coil. The wire extending from the stator core is soldered to the connecting land portion. The opening portion of the attachment board is arranged at a position such that it makes no direct contact with the wire.

Abstract: In fixing the rotor holder and the torque transmission member, a lower surface projection is arranged at the lower surface of the torque transmission member, and thermal deformation is performed with the lower surface projection inserted into the plate-like portion pass through hole formed in the rotor holder. The inner peripheral surface corresponding to the position in the axial direction where the center pass through hole of the torque transmission member is fixed to the outer peripheral surface of the cylindrical projection of the rotor holder does not contact the outer peripheral surface of the shaft.

Abstract: An inner rotor type motor includes a turn table having a disk loading portion and a central opening portion arranged to allow a disk to be attached thereto and removed therefrom, a rotor concentric with a rotation axis of the turn table, the rotor including a rotor holder having therein a rotor magnet and a cylindrical portion arranged to retain on an outer circumferential surface thereof the rotor magnet, and a stator having an armature arranged to oppose an outer circumferential surface of the rotor magnet via a gap therebetween. The turn table is affixed in an axial direction on an upper portion of the rotor holder, and the disk loading portion is arranged radially outside the cylindrical portion of the rotor holder. A disk loading surface of the disk loading portion is arranged to make contact with the disk, and a bottom portion of the disk loading portion is arranged axially below an area where the turn table and the rotor holder make contact with one another.