Linear vibration motor using resonance frequency

Abstract

A linear vibration motor comprising a movable unit, a base assembly having a coil assembly, a housing and an elastic member, in which the movable unit has the maximum mass from a fixed housing volume. The elastic member has the outer periphery fixed to the ceiling of the housing and the inner periphery fixed to the top of the movable unit opposed to the outer periphery. The elastic member is deformable to the extent that the outer and inner peripheries are shift to a coplanar position from a parallel position where they are spaced for a predetermined distance from each other. The core assembly is distanced downward from the movable unit or a predetermined gap.

Description

[0001] priority [0002] This application claims the benefit of Korean Patent Application No. 2004-11907 filed on February 23, 2004 and No. 2004-21673 filed on March 30, 2004 at the Korean Intellectual Property Office, the contents of which are hereby incorporated by reference refer to. technical field [0003] The present invention relates to linear vibration motors using resonant frequencies. More specifically, in a vertical vibration motor that does not use a conventional vibration motor mechanism based on brushes and commutators, the linear vibration motor of the present invention can minimize the volume of elastic members in addition to minimizing the path of motion , in order to maximize the amplitude of the vibration in the fixed volume. Background technique [0004] Communication instruments usually have call receiving functionality as one of their base functions. Typically, the call receiving function generates sounds such as tunes and ringtones or vibrates the c...

AI Technical Summary

Problems solved by technology

[0019] Unfortunately, brush-type vibrating motors incorporating such a commutator have the following problems: During motor rotation, the brushes, usually in the gaps between segments of the commutator, generate mechanical friction and electrical sparks to wear the brushes and commutator, thereby shortening the life of the motor

[0026] However, image 3 The illustrated portable vibrator 400 also has the following problems: the coil 420 is placed on the inner wall of the housing which takes up a lot of space, and the elastic member is a coil elastic member (i.e., if it protrudes to the maximum extent, it accumulates the thickness of its plate by thickness). elastic member occupying volume) so that accounting for the volume occupied by the elastic member does not provide space for increasing the volume of the vibrator of fixed volume except for the trajectory drawn by its motion

That is, the mass of the vibrator, and thus the amplitude in a fixed volume, cannot be maximized

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