Patent ID: 9621015
Date: 2017-04-11
CPC Classifications: H02K

Claim:
1. A linear vibration actuator in which a magnet and a weight are fixed, and the magnet causes reciprocating motion of the weight and the magnet using a coil within a casing, the linear vibration actuator comprising: a shaft provided standing within the casing, the shaft being made of a magnetic material and forming a magnetic circuit; a coil supported by the shaft; the magnet, magnetized in an axial direction parallel to an axial line direction of the shaft, being a ring-like magnet arranged to surround the coil and the shaft and comprising a pair of yokeless opposing ring-like flat surface parts; wherein the weight being fixed to the magnet; and a biasing unit arranged within the casing, and biasing the magnet and the weight in the axial line direction of the shaft.