Lens driving device, camera device, and optical instrument

A lens driving device comprising:

• a base;
• a first holder disposed on the base;
• a second holder disposed in the first holder;
• a first magnet disposed on the second holder;
• a second magnet disposed on the base;
• a first coil and a second coil coupled with the first holder;
• a first ball disposed between the base and the first holder;
• and
• a second ball disposed between the first holder and the second holder,
• wherein the first ball is disposed between an upper plate of the base and an upper plate of the first holder, and
• wherein the second ball is disposed between an inner side surface of the first holder and an outer side surface of the second holder.

A lens driving device comprising:

• a fixed part;
• a first moving part configured to move in an x-direction or a y-direction with respect to the fixed part;
• a second moving part configured to move in a z-direction with respect to the first moving part;
• a first ball disposed between the fixed part and the first moving part;
• a second ball disposed between the first moving part and the second moving part;
• and
• a wire coupled with the fixed part and the first moving part,
• wherein the first ball is configured to guide the first moving part to move in the x-direction and the y-direction and is disposed outside an area of the first moving part connected with the wire.