Abstract: An axial-air-gap brushless vibration motor has an eccentric rotor R in which an axial-air-gap magnet and an arched weight are provided in a rotor yoke which is rotatably mounted on a shaft fixed to a yoke bracket. A stator base is attached to the yoke bracket which includes a magnetic portion receiving the magnetic field of the magnet and a nonmagnetic portion. One Hall sensor and a drive circuit member for receiving output of the Hall sensor are disposed so that they do not overlap on a radial plane, of the stator base which has single-phase air-core armature coils installed. A cover member is welded to the yoke bracket.

Abstract: An eccentric rotor wherein a printed wiring board in which commutator segments are formed at a first surface, two wound air-cored coils arranged with a prescribed arrangement angle about the shaft as a center at the second surface of the printed wiring board, and a weight are integrally molded into a disk-like shape with a resin by injection molding. The weight comprises a first surface of the weight which is exposed at the side surface of the rotor together with the first surface of the printed wiring board and a second surface of the weight which is exposed at the other surface of the rotor together with the wound air-cored coil. The resin which integrates the aforementioned components and forms an outer peripheral resin portion having a circular-arc periphery about the shaft as a center. The outer contours of the weight and printed wiring board are so formed as to assume positions separated from the outer periphery inwardly in a circular-arc portion.

Abstract: An axial-air-gap brushless vibration motor has an eccentric rotor R in which an axial-air-gap magnet and an arched weight are provided in a rotor yoke which is rotatably mounted on a shaft fixed to a yoke bracket. A stator base is attached to the yoke bracket which includes a magnetic portion receiving the magnetic field of the magnet and a nonmagnetic portion. One Hall sensor and a drive circuit member for receiving output of the Hall sensor are disposed so that they do not overlap on a radial plane, of the stator base which has single-phase air-core armature coils installed. A cover member is welded to the yoke bracket.

Abstract: An axial-air-gap brushless vibration motor has an eccentric ro or R in which an axial-air-gap magnet and an arched weight are provided in a rotor yoke which is rotatably mounted on a shaft fixed to a yoke bracket. A stator base is attached to the yoke bracket which includes a magnetic portion receiving the magnetic field of the magnet and a nonmagnetic portion. One Hall sensor and a drive circuit member for receiving output of the Hall sensor are disposed so that they do not overlap on a radial plane, of the stator base which has single-phase air-core armature coils installed. A cover member is welded to the yoke bracket.

Abstract: An eccentric rotor wherein a printed wiring board in which commutator segments are formed at a first surface, two wound air-cored coils arranged with a prescribed arrangement angle about the shaft as a center at the second surface of the printed wiring board, and a weight are integrally molded into a disk-like shape with a resin by injection molding. The weight comprises a first surface of the weight which is exposed at the side surface of the rotor together with the first surface of the printed wiring board and a second surface of the weight which is exposed at the other surface of the rotor together with the wound air-cored coil. The resin which integrates the aforementioned components and forms an outer peripheral resin portion having a circular-arc periphery about the shaft as a center. The outer contours of the weight and printed wiring board are so formed as to assume positions separated from the outer periphery inwardly in a circular-arc portion.

Abstract: In order to reduce the number of parts and decrease the thickness of each part, while still obtaining a sufficient strength, with a simple structure, an eccentric rotor R in which an axial-air-gap magnet 8 and an arched weight 9 are provided in a rotor yoke 6 is rotatably mounted on a shaft 2 fixed to a yoke bracket 1, and a stator base 3 is attached as an auxiliary component to the yoke bracket comprising a magnetic portion 1b receiving the magnetic field of the magnet and a nonmagnetic portion 1e. One Hall sensor H and a drive circuit member D for receiving the output of the Hall sensor are disposed so that they do not overlap, in a plan view thereof, the stator base 3 having single-phase air-core armature coils installed thereof, and a cover member 10 covering those components is welded at the opening portion to the outer periphery of the yoke bracket.