| 摘要 |
PROBLEM TO BE SOLVED: To provide a diaphragm driving device capable of suppressing vibration in closed-loop control. SOLUTION: The diaphragm driving device is equipped with a rocking unit having a diaphragm plate for intercepting a part of luminous flux, a coil constituting a voice coil motor, and a rocking arm having a bearing part between the diaphragm plate and the coil. Furthermore, the diaphragm driving device is equipped with a fixed unit having a rocking shaft for supporting the arm to rock, and a magnet and a yoke constituting the voice coil motor with the coil. The position of the center of gravity of the rocking unit is nearly aligned with the acting position of driving force in the coil in the direction of the rocking shaft. COPYRIGHT: (C)2008,JPO&INPIT
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