Voice coil motor with connective stability

摘要

A voice coil motor (VCM) includes a moving unit, a fixing unit, an elastic plate, and a conducting pole. The moving unit includes a moving barrel and a coil assembly around the moving barrel. The coil assembly includes a connecting portion. The moving barrel defines a blind hole on an upper surface thereof, one end of a conducting pole being received in the blind hole. The fixing unit defines a through hole receiving the moving unit. The elastic plate is connected between the moving barrel and the fixing unit. The conducting pole provides a stable electrical connection between the elastic plate and the connecting portion notwithstanding movements of the moving barrel.

主权项

1. A voice coil motor (VCM), comprising:
a moving unit comprising:
a moving barrel comprising an upper surface, a lower surface, and a first outer surface connected between the upper surface and the lower surface; the moving barrel defining a blind hole on the upper surface; anda coil assembly comprising a coil portion encircling the first outer surface and a connecting portion connected to the coil portion; a fixing unit defining a through hole, the through hole receiving the moving unit; an elastic plate connected between the moving barrel and the fixing unit, and defining a plurality of first connecting holes and a plurality of second connecting holes; and a conducting pole electrically connected to the elastic plate and the connecting portion, wherein the conducting pole comprises a first cylinder portion and a second cylinder portion positioned one end of the first cylinder portion, an internal diameter of the second connection hole is slightly less than an external diameter of the first cylinder portion and is slightly greater than an external diameter of the second cylinder portion, the second cylinder portion extends through one of the second connecting holes and is received in the blind hole, and the first cylinder portion pressing against the elastic plate.