Patent ID: 8269379
Filing Date: 2012-09-18
Classification: H02K

Abstract:
1. A linear vibrator, comprising: a cover; a base forming a housing together with the cover, the base defining a bottom wall, a plurality of sidewalls extending vertically from the bottom wall, and a blocking ring extending form a central portion of the bottom wall; a plurality of elastic members received in the housing, each of the elastic members including a fastening portion connecting to the housing, an elastic arm extending from the fastening portion, and a mounting portion extending from the elastic arm, the elastic arm being deformable parallel to the bottom wall; a weight suspended in the housing by the elastic members and defining a through hole therein, the weight further defining at least a pair of patches; a magnet assembly accommodated in the through hole of the weight, a half part of the magnet assembly having magnetic poles opposite to those of the other half, and planes of magnetic poles of the magnet assembly being parallel and facing to the bottom wall of the base; and a printed circuit board covered by the housing for carrying a coil thereon, the coil being located below the magnet assembly, wherein the blocking ring is located on the vibration path during vibration of the combination of the weight and the magnet assembly for being capable of withstanding the patches for protecting the elastic members from plastic deformation.