Multi-function vibration actuator
A multifunction oscillatory actuator which performs acoustic reproduction by an acoustic reproduction section includes a diaphragm having a voice coil attached thereto and performs the occurrence of somesthetic oscillation by a magnetic circuit section having a magnet attached thereto, and in which the acoustic reproduction section and the magnetic circuit section are attached to a housing having a cylindrical shape, such that the magnetic circuit section is supported on an inner wall of the housing by a frame-shaped suspension.
1. A multifunction oscillatory actuator for acoustic reproduction, comprising:
an acoustic reproduction section including a diaphragm having a voice coil attached thereto;
a magnetic circuit section having a magnet attached thereto, the magnetic circuit section is adapted to produce somesthetic oscillation;
a rectangular-shape housing having an inner wall;
the acoustic reproduction section and the magnetic circuit section are attached to the rectangular-shape housing such that the magnetic circuit section is supported on the inner wall of the rectangular-shape housing by a frame-shaped suspension having four connected sides disposed on substantially a same plane to form the frame shape; and two magnetic attaching sections symmetrically formed on two opposite sides of the frame-shaped suspension so as to attach the suspension to two corresponding suspension attaching sections formed on the magnetic circuit section, and housing attaching sections symmetrically formed on other two opposite sides of the frame-shaped suspension so as to attach the suspension to two corresponding suspension attaching sections of the rectangular-shape housing.
2. The multifunction oscillatory actuator according to claim 1 , wherein
the magnetic circuit section has a structure in which the magnet is plate-shaped and magnetized in an oscillation direction and is sandwiched between a plate-shaped pole piece and a cup-shaped yoke, both of the plate-shaped pole piece and the cup-shaped yoke are formed of a magnetic material, and
an inclined section is formed on an outer circumference of the yoke for fixing a portion of the frame-shaped suspension.
3. The multifunction oscillatory actuator according to claim 1 , wherein a through-hole is formed in a side surface of a cover, the through-hole is formed on a side opposite to the diaphragm with a side surface of the rectangular-shape housing or the magnetic circuit section of the housing interposed therebetween.
4. The multifunction oscillatory actuator according to claim 1 , wherein a flow rate of air in a side surface of the magnetic circuit section is restricted by reducing a distance between the side surface of the magnetic circuit section and a cover or the inner wall of the rectangular-shape housing.