Flat vibration motor for cellular phone sound speaker system, has flexible printed circuit board which receives power from system board through solder lands formed at one end

摘要

#CMT# #/CMT# A flexible printed circuit board (PCB) (21) covers a lower case (20) of the motor. The PCB has a brush (26b) contacting with a commutator and solder lands (21b) formed at regular interval on either ends. The PCB electrically connects a system board to receive power from the system board's terminal through solder land. Several winding coils fixed using resin insulator are provided on upper board (25). #CMT#USE : #/CMT# For cellular phone sound speaker system in producing vibration for notifying incoming call. #CMT#ADVANTAGE : #/CMT# Does not need a lead wire for receiving power and welding process for welding the lead wire, as the lower board itself receives the power from the system board. Hence workability and productivity of the system is increased. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows an exploded perspective view of the flat vibration motor. 20 : Lower case 21 : Printed circuit board 21b : Solder lands 25 : Upper board 26b : Brush.