Patent ID: 7518832

Claim:
A coil assembly comprising: a support frame which has a first support surface and a second support surface opposed to each other and in which a voice coil is fixed; and a board unit having a base portion on which an electronic component is mounted, a belt-shaped main flexible printed circuit board extending from the base portion, and a connecting portion extending from one side of an extended end portion of the main flexible printed circuit board, the connecting portion including a first connecting portion which extends in a longitudinal direction of the main flexible printed circuit board and has a plurality of first connection pads arranged in the longitudinal direction, a junction portion extending from the first connecting portion, and a second connecting portion which extends in the longitudinal direction of the main flexible printed circuit board from the junction portion and has a plurality of second connection pads arranged in the longitudinal direction, the first connecting portion being fixed to the first support surface of the support frame, and the second connecting portion being folded back at the junction portion and fixed to the second support surface of the support frame.