Patent ID: 8624450
Filing Date: 2014-01-07
Classification: H02K

Abstract:
1. A linear vibration device, comprising: a cover; a crust forming a housing together with the cover, the crust defining a bottom wall and a plurality of sidewalls extending upwardly and perpendicularly from 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; a moving unit suspended in the housing by the elastic members, the moving unit including an aperture in a middle portion thereof for receiving a magnet assembly and a plurality of positioning portions engaging with the mounting portions of the elastic members; the magnet assembly accommodated in the aperture and defining a first magnet part and a second magnet part separately each other, the first magnet part having magnetic poles opposite to those of the second magnet part and planes of the magnetic poles of the magnet assembly being parallel and facing to the bottom wall of the crust; a PCB at least partially covered by the bottom wall of the crust; a coil mounted on the PCB and located below the magnet assembly; a supporting portion coupling to the elastic member, the supporting portion defining a supporting plate covering at least a part of a top surface of the moving unit and a supporting arm extending downwardly from the supporting plate for pushing the mounting portion toward the positioning portion of the moving unit; wherein the mounting portion defines a main board and a fender extending parallelly from the two ends of the main board, the fender having a top part above the top surface of the moving unit for restricting the position of the supporting plate.