Patent ID: 7960875
Filing Date: 2011-06-14
Classification: B06B

Abstract:
1. A vibration generator comprising: a movable base formed of a substrate; a weight body supported by the movable base; and a magnetically-driven portion that applies a vibration to the weight body, wherein first and second elastically deformable portions are formed integrally with the movable base, the weight body is supported through the first elastically deformable portion, the movable base is supported by a case through the second elastically deformable portion, the magnetically-driven portion is provided between the movable base and the weight body, the bending elastic modulus of the second elastically deformable portion is different from that of the first elastically deformable portion, and a natural frequency when the weight body is vibrated by a driving force applied to the weight body from the magnetically-driven portion is different from a natural frequency when the movable base is vibrated by a reaction force to the driving force: wherein the first elastically deformable portion has a deformable arm formed of the substrate and a fixing portion, which is formed on the side of a free end of the deformable arm and to which the weight body is fixed, and the second elastically deformable portion is formed by reducing the area of the substrate between the installation portion and the supporting plate.