Abstract: Provided is a rotating device having excellent performance of cooling a heat generation source. Included are a shaft member, a rotating body having a tubular shape and rotatable about the shaft member, a bearing supporting the rotating body with respect to the shaft member, and a coupling member disposed between the bearing and the rotating body in a radial direction. The coupling member includes a ventilation channel communicating with an inside and an outside of the rotating body.

Abstract: A rotating body is shorter in radial direction than in axial direction. The inner circumferential surfaces of a first bearing and a second bearing are fixed at an outer circumferential surface of the shaft member. In the axial direction, the outer diameter of the shaft member is substantially the same from a part, of the shaft member, opposing the first bearing to a part, of the shaft member, opposing the second bearing, and the inner and outer diameters of the rotating body are substantially the same from an end part, of the rotating body, on the first bearing side to an end part, of the rotating body, on the second bearing side. In the axial direction, one of stators is disposed at a central part (C1) of the shaft member, one of magnets is disposed at a central part (C2) of the rotating body.

Abstract: A rotating device comprising: an axial member; a tubular rotating body rotatable in relation to the axial member; a tubular housing surrounding the rotating body; a bearing supporting the rotating body with respect to the axial member; a stator inside the rotating body; and one or a plurality of rotor blades provided to the rotating body.

Abstract: To provide a motor capable of meeting a demand for size reduction. The motor includes an axial member, a tubular rotating body rotatable in relation to the axial member, a bearing supporting the rotating body with respect to the axial member, and a stator inside the rotating body. The rotating body preferably includes a tubular member formed of a single member, and a magnet.