Patent ID: 6081055
Filing Date: 2000-06-27
Classification: H02K,H05K,Y10T

Abstract:
A vibration motor comprising:a metal holder frame provided with a motor accommodation portion for receiving and holding a substantially tubular drum portion of a vibration motor body; andterminal pieces for being affixed and connected to end portions of the vibration motor body;the metal holder frame having:a bottom plate portion for soldering to a reverse surface pattern a printed circuit board, said reverse surface pattern being opposite to a front surface pattern of said printed circuit board on which principal electronic parts are to be mounted by soldering; anda bulge portion formed by making a depression in the rear side of the bulge portion to make a projection on the front side of the bulge portion at least at one position of the bottom plate portion;said depression in said rear side of the bulge portion being formed in such a way that, during a double-side mounting process of mounting on the printed circuit board, melted solder fills the depression and adhesion force is strengthened by the surface tension.