Lens driving apparatus

A lens driving apparatus comprising:

• a base;
• a yoke disposed on the base, the yoke comprising a first side plate, a first upper plate extending from the first side plate, a second side plate extending upwardly from the first upper plate, and a second upper plate extending from the second side plate, wherein the second upper plate of the yoke comprises a hole;
• a bobbin disposed in the yoke;
• four magnets respectively disposed at corners of the yoke and coupled to the yoke;
• a coil wound around an outer peripheral surface of the bobbin while facing the four magnets;
• and
• springs coupled to the bobbin to provide restoration force to the bobbin;
• wherein the springs comprise an upper spring coupled to an upper portion of the bobbin and a lower spring coupled to a lower portion of the bobbin;
• wherein the upper spring is disposed in the yoke,
• wherein the upper spring comprises an inner side coupled to the upper portion of the bobbin, an outer side disposed between the first upper plate of the yoke and the four magnets at the corners of the yoke, and an intermediate portion connecting the inner side and the outer side;
• wherein the outer side of the upper spring is interposed between the first upper plate of the yoke and the four magnets and is horizontally overlapped with the first side plate of the yoke and disposed inside the first side plate;
• wherein the first side plate, the first upper plate, the second side plate, and the second upper plate are monolithically formed;
• wherein, at each of the corners of the yoke, a bottom surface of the upper spring directly contacts a top surface of the respective magnet, and a top surface of the upper spring is vertically distanced from the second upper plate of the yoke;
• wherein the outer side of the upper spring is vertically overlapped with a lower surface of the first upper plate of the yoke and coupled to the first upper plate of the yoke, and
• wherein the intermediate portion of the upper spring is vertically overlapped with the second upper plate of the yoke such that a gap is vertically provided between a top surface of the intermediate portion and a lower surface of the second upper plate of the yoke, and the intermediate portion of the upper spring is configured to be moved vertically in the gap.