Patent attributes
A voice coil motor lens module has a two part casing accommodating a magnet housing of annular form with an outer wall and an inner wall joined by a top wall. One or more magnets producing a magnetic field, are fitted to the inner surface of the outer wall. A lens holder, for supporting a lens, has a coil fitted to an outer surface thereof and is suspended by a pair of springs such that the coil is disposed within the magnetic field. The lens holder has an inner bore and an axially upper end. The inner wall extends into the inner bore of the lens holder and the upper end of the lens holder rests, in a park position, against an upper cushion fixed to an inner surface of the top wall. In use, current passing through the coil moves the lens holder downwardly to focus an image on an image sensor below the lens holder. At a fully extended position, the lower end of the lens holder rests against a lower cushion fixed to the casing.
