Patent ID: 8729746

Claim:
A linear vibration device comprising: a vibrating body comprising: a magnet configured to create a magnetic field, upper and lower plates installed to concentrate a direction of a magnetic force of the magnet to a specific direction, and a vibrator coupled to the upper plate and configured to increase a magnitude of vibrations; a resilient body coupled to an upper surface of the upper plate to transfer a vibration sound of the vibrating body to the outside of the linear vibration device, and configured to permit the vibrating body to move upward and downward; a hollow case coupled to the resilient body to transfer the vibration sound to the outside of the linear vibration device; and a stator installed on a lower surface of the vibrating body, and the stator comprising: a yoke configured to concentrate an electromagnetic force to a direction, a coil coupled to the yoke to generate the electromagnetic force, a printed circuit board (PCB) coupled to the coil to transfer an electric signal with a specific frequency which is received from the outside of the linear vibration device, and a bracket coupled to the PCB and having an extension piece protruding at a peripheral portion of the bracket, wherein the yoke includes: a head portion with a diameter larger than an outer diameter of the coil, and a pillar portion with a diameter smaller than an inner diameter of the coil.