Camera module

A camera module comprising:

• a housing accommodating a lens module;
• a driving unit comprising a magnet disposed on the lens module and a coil disposed to face the magnet;
• a yoke configured to generate attractive force with the magnet;
• and
• a first ball member disposed between the lens module and the housing and pressed by the attractive force, and comprising first balls arranged in an optical axis direction;
• and
• a second ball member disposed between the lens module and the housing and pressed by the attractive force, and comprising second balls arranged in the optical axis direction,
• wherein a first distance between a center of a first uppermost ball and a center of a first lowermost ball in the optical axis direction, among the first balls, is different from a second distance between a center of a second uppermost ball and a center of a second lowermost ball in the optical axis direction, among the second balls.

A camera module comprising:

• a housing comprising a first receiving groove and a second receiving groove;
• a lens module accommodated in the housing and comprising a third receiving groove facing the first receiving groove and a fourth receiving groove facing the second receiving groove;
• first ball bearings disposed is a first space defined by the first receiving groove and the third receiving groove;
• and
• second ball bearings disposed is a second space defined by the second receiving groove and the fourth receiving groove,
• wherein the housing comprises a first protrusion protruding into the first space and a second protrusion protruding into the second space, and a length of the first protrusion in an optical axis direction is different from a length of the second protrusion in the optical axis direction.