Abstract: To provide an SmCo-based rare earth sintered magnet having a small diameter and a multipolar magnetized magnetic structure and having a high coercive force and a high magnetization rate. The outer shape of an SmCo-based rare earth sintered magnet having a coercive force HCJ (kOe) at a room temperature (° C.) of 7.5 (kOe)<HCJ?27 (kOe) is formed into any one of a cylindrical shape, a ring-like shape, a columnar shape, and a disk-like shape. Multi-pole magnetization is performed on the SmCo-based rare earth sintered magnet so as to satisfy (diameter D/the number of poles p) (mm)<(4/?) (mm) (p is an even number equal to or greater than 4), and the magnetization rate is set to 80(%) or more.

Abstract: A small rotary encoder capable of easily fitting a substrate into a proper position without using an adhesive or the like is provided. Slits are formed in an encoder case so that the encoder case is partially plate-spring shaped, a step portion and a claw portion are formed on the inner circumference of the encoder case, convex portions and concave portions that are combined with each other are formed on the inner circumference of the encoder case and a substrate, respectively. When the substrate is inserted into the encoder case, the encoder case is bent by the slits so that the substrate can be inserted into the encoder case. The substrate is inserted between the step portion and the claw portion, so that the substrate can be fitted into the encoder case, and the substrate is prevented from being incorrectly fitted in a circumferential direction, so that a position can be easily determined.

Abstract: A small rotary encoder capable of easily fitting a substrate into a proper position without using an adhesive or the like is provided. Slits are formed in an encoder case so that the encoder case is partially plate-spring shaped, a step portion and a claw portion are formed on the inner circumference of the encoder case, convex portions and concave portions that are combined with each other are formed on the inner circumference of the encoder case and a substrate, respectively. When the substrate is inserted into the encoder case, the encoder case is bent by the slits so that the substrate can be inserted into the encoder case. The substrate is inserted between the step portion and the claw portion, so that the substrate can be fitted into the encoder case, and the substrate is prevented from being incorrectly fitted in a circumferential direction, so that a position can be easily determined.

Abstract: A very thin fan motor with an attached heat sink that has high heat radiation and air cooling effects in a small, flat, thin package, that has a simple and easily assembled overall structure as a fan motor, and that has superior cooling efficiency.