Patent ID: 7529381

Claim:
A multifunction-type vibration actuator comprising: a thin plate-like diaphragm to an inner surface of which is installed: a voice coil; a magnetic circuit part composed of a yoke, a magnet, and a pole piece; and a leaf spring-like suspension for holding said magnetic circuit part, said magnet circuit part is assembled inside a wall of a housing with said suspension, said voice coil is inserted into a magnetic gap of said magnetic circuit part such that said diaphragm fits tightly inside said wall of said housing, and said voice coil is electrically connected to an external terminal with lead wires pulled out to an outside of said wall, wherein said housing is integrally formed with a first house part with an elliptic wall and a second house part with a cylindrical wall of which a diameter corresponds to a width of said first house part at a center of a ellipse at both bottom walls of said first house part, said elliptic diaphragm to which an inner surface of said annular voice coil is installed, said circular magnetic circuit part provided with a magnetic gap into which said voice coil is inserted, and said suspension is disk-shaped, said elliptic diaphragm fits tightly inside a wall of said first house part, and said circular magnetic circuit part is assembled in a cylinder of said second house part with said suspension, and wherein the multi-function type vibration actuator comprises only one voice coil and only one magnet.