Lens driving device and camera module including same

A lens driving device comprising:

• a base;
• a plurality of pins coupled to the base;
• and
• a housing including a lens group and configured to move in an optical axis direction along the pins,
• wherein the housing comprises a ball accommodation part and a plurality of balls disposed inside the ball accommodation part and surrounding a first pin of the pins,
• wherein the first pin is disposed in the ball accommodation part to guide the housing while contacting the plurality of balls,
• wherein the housing comprises a first housing including a first lens housing in which a first lens group is accommodated, and a first driver housing including a magnet and the ball accommodation part,
• wherein the first housing includes a first protrusion extending from the first lens housing in a direction perpendicular to the optical axis direction, and a first guide groove provided in the first protrusion,
• wherein the pins include a second pin disposed in the first guide groove to guide the movement of the first lens assembly,
• wherein the base includes a first recess corresponding to a shape of the second pin,
• wherein the lens driving device comprises a first driving part disposed below the first housing,
• wherein the first driving part includes a first yoke and a first coil part disposed on the first yoke, and
• wherein the first driving part is disposed between the first pin and the second pin.