Abstract: A drive device includes: a driven member; and an outer rotor type motor driving the driven member, wherein the outer rotor type motor comprises a rotor, the rotor includes: a rotational shaft connected to the driven member; a yoke secured to the rotational shaft; and a permanent magnet secured to the yoke, the yoke is provided with a balance portion for shifting a center of gravity of the yoke with respect to a rotational center of the yoke, and the balance portion reduces imbalance caused when the rotational shaft is rotated.

Abstract: A compressor includes: a cylinder; a crankcase; a piston arranged within the cylinder and the crankcase; and an outer rotor type motor causing the piston to reciprocate, wherein the outer rotor type motor comprises: a stator; a coil wound around the stator; a rotational shaft; a yoke connected with the rotational shaft; and a permanent magnet secured to the yoke, and the yoke is formed with an air hole.

Abstract: A compressor includes: a cylinder; a piston arranged within in the cylinder; an outer rotor type motor causing the piston to reciprocate within the cylinder; an air pipe communicated with the cylinder such that air flows into the air pipe in response to reciprocation of the piston; and a fan secured to a rotor of the outer rotor type motor and facing at least a part of the air pipe.

Abstract: A compressor includes: a cylinder; a piston arranged within the cylinder; an outer rotor type motor causing the piston to reciprocate within the cylinder; and a fan fixed to a rotor of an outer rotor type motor and facing at least a part of the cylinder.

Abstract: A motor includes: a rotor comprising: a rotary shaft; a magnetic body rotatable together with the rotary shaft; and first and second permanent magnets fixed on an outer circumference or an inner circumference of the magnetic body, and a stator comprising: an iron core arranged around the rotor; and a coil for exciting the iron core.

Abstract: A magnet includes: a magnet main body; and an ultraviolet curing resin layer formed on a surface of the magnet main body.

Abstract: A printed circuit board unit includes: a printed circuit board including a through hole including first and second inner surfaces opposite to each other; a terminal pin including an insertion portion inserted into the through hole; solder filled into the through hole, and joining the printed circuit board with the terminal pin, wherein the insertion portion includes a base portion abutting the first inner surface, and a protruding portion including: a projection surface projecting from the base portion to the second inner surface and abutting the second inner surface; and a recess surface located at a rear side of the projection surface and spaced apart from the first inner surface, and a length of the protruding portion a thickness direction of the printed circuit board is greater than a thickness of the printed circuit board.

Abstract: A disk chucking device for an optical disk drive includes a turn table that is rotated by a spindle motor and a chucking pulley that has a pressure contacting surface on one side thereof and at least one wall peripherally and circularly on the other side thereof, in which the pressure contacting surface forces an optical disk to come into pressure contact with and attaches the optical disk to a reference surface for disk attachment of the turn table and the wall is capable of preventing acceleration of airflow caused by centrifugal force due to rotation of the optical disk and thus reducing flow noise.

Abstract: A disk drive includes a rotation drive mechanism that rotates a disk; an optical unit that records information on the disk and/or reproduces information therefrom; a moving mechanism that moves the optical unit; a chassis that supports the rotation drive mechanism, the optical unit and the moving mechanism; and a weight positioned opposite, via a rotational axis of the rotation drive mechanism, to an initial center-of-gravity position of the chassis that includes the rotation drive mechanism, the optical unit and the moving mechanism.

Abstract: A method of manufacturing a cup-shaped coil assembly is described which employs a coil bobbin of a special design. The bobbin comprises a cylindrical member, a disc connected with one end of the cylindrical member to close it, a cap member detachably fitted into an opening in the other end of the cylindrical member, and a shaft disposed in alignment with the axis of the cylindrical member and having its one end attached to the disc and its other end slidably extending through the cap member. The method comprises the steps of assembling a coil bobbin in the manner mentioned above, and forming a coil around the bobbin by a skewed winding of wire, pressing the cap member into the cylindrical member, diametrically enlarging an opening formed at one end of the coil, and removing the cap member from the coil formed.