| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size of a vibration motor in a radial direction while inhibiting a decrease in a vibration amount.SOLUTION: A vibration motor 1 comprises: a base part 12 which extends in a direction perpendicular to a central axis extending a vertical direction; a shaft 15 with a lower limit being fastened to the base part, which projects upward along the central axis; a circuit board 13 arranged on the base part; a coil part 14 which is attached on the circuit board to face the shaft in a radial direction across a gap; a bearing part 21 rotatably attached to the shaft above the coil part; a rotor holder 16 attached to the bearing part; a magnet part 17 and an eccentric weight 18 which are attached to the rotor holder; a spacer 22 which attached to the shaft between the bearing part and the coil part and has a top face contacting an undersurface of the bearing part; and a cover part 11 which covers at least a part of an upper side and a lateral side of each of the rotor holder and the eccentric weight and which is fixed to an upper limit of the shaft and an outer edge of the base part, in which an undersurface of the spacer faces a top face of the coil part in a vertical direction.SELECTED DRAWING: Figure 2 |
