Patent ID: 7670304

Claim:
A vertical movement vibrator comprising: a baseplate; an electric magnet unit comprising a yoke and an electric magnet coil, wherein the yoke comprises: a circular base located at the center of the baseplate; a rod-shaped center pole protruded upwards from the center of the base; a cylindrical outer extension extended by the height of the center pole upwards from the end of the base; and a magnetic gap former which is bent twice and extended inwards from the outer extension thereby forming a magnetic gap between the upper end of the center pole and the bent portion of the outer extension, and wherein the electric magnet coil is wound around the center pole and through which a direct-current (DC) electric power is applied; a driving coil which is movably inserted into the magnetic gap and through which an alternating driving signal is applied; a vibration plate to the lower side of which a bobbin around which the driving coil is wound is attached to accomplish vibration up and down; a vertical movement guide unit for guiding the vibration plate to perform vertical movement at the time of the up-and-down vibration of the vibration plate; and a movement range limiting and vibration absorption unit which limits a movement range of the vibration plate when the vibration plate performs a vertical movement, and simultaneously absorbs an impact when the vibration plate falls down.