| 摘要 |
A camera module includes a lens unit; a holder which houses the lens unit therein and is displaceable along an optical axis direction of the lens unit; a coil provided on the holder; a yoke, four main magnets and two flat plate-shaped auxiliary magnets which provide a magnetic field to the coil, in which the yoke has a roughly rectangular and relatively thin box shape of which bottom side is opened so that the yoke is defined by four side wall portions and a top plate portion, and the yoke also has an opening formed in the top plate portion for receiving the holder; upper and lower leaf springs respectively attached to the upper and lower cylindrical end portions of the holder for supporting the holder so as to be displaceable along the optical axis direction; and a base which supports the yoke and the lower leaf spring. In the camera module, the coil is formed into a roughly cylindrical shape having two opposite outer circumferential flat surfaces, each of the four main magnets has a triangle block shape and they are respectively arranged at the four corner portions inside the yoke, and the two auxiliary magnets are respectively arranged on a pair of the opposite side wall portions of the yoke so as to face the corresponding outer circumferential flat surfaces of the coil, respectively.
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