VOICE COIL MOTOR

摘要

A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a cylindrical bobbin for accommodating a lens and protruded at a bottom end with a boss, and a coil block arranged at a periphery of the bobbin; a stator including a magnet facing the coil block and a yoke fixing the magnet; and an elastic member including a first elastic member formed with a through hole coupled to the boss of the bobbin and a second elastic member coupled to an upper end facing the bottom end of the bobbin; wherein the boss is formed with a disengagement prevention unit preventing the first elastic member from being disengaged from the boss, and the first elastic member is formed with a coupling unit contacting a joint where the disengagement prevention unit and the coupling unit meet.

主权项

1. A voice coil motor comprising:
a base; a yoke disposed over the base; a bobbin disposed inside the yoke and including a first protrusion unit at a lower portion and a second protrusion unit at an upper portion; a coil block disposed on a side surface of the bobbin; a magnet facing the coil block and secured at the yoke; an upper elastic member coupled to the upper portion of the bobbin and including an outer unit, an inner unit and a connection unit; and a lower elastic member coupled to the lower portion of the bobbin, wherein the lower elastic member includes a first spring and a second spring separated from the first spring, and each of the first and second springs includes an outer unit, an inner unit and a connection unit, respectively, wherein a portion of each outer unit of the first and second springs is bent to form a terminal, wherein a portion of each inner unit of the first and second springs includes a first through hole corresponding to the first protrusion unit, wherein a portion of the inner unit of the upper elastic member includes a second through hole corresponding to the second protrusion unit, and wherein the first protrusion unit is positioned at a location corresponding to the first through hole, and the second protrusion unit is positioned at a location corresponding to the second through hole.