Camera actuator and camera module including same

A camera actuator comprising:

• a housing,
• a first lens unit;
• a first lens barrel;
• a second lens barrel;
• a first driving unit coupled to the first lens barrel in the housing and configured to move the first lens barrel in an optical axis direction;
• and
• a second driving unit coupled to the second lens barrel in the housing and configured to move the second lens barrel in the optical axis direction,
• wherein the first lens unit, the first lens barrel and the second lens barrel are arranged sequentially in the housing in the optical axis direction,
• wherein the housing includes an inner lower surface facing a lower surface of each of the first and second lens barrels,
• wherein a guide is disposed on the inner lower surface of the housing and protrudes in an inner upper surface direction,
• wherein the guide is disposed in a region overlapping the second lens barrel without overlapping the first lens barrel,
• wherein a lower surface of the second lens barrel includes a second stepped portion, the second stepped portion is configured to divide the lower surface into a first second lower surface having a first height and a second lower surface having a second height different from the first height, and
• wherein the guide contacts the second lower surface without contacting the first second lower surface.

A camera module comprising:

• a first camera actuator, and
• a second camera actuator,
• wherein the first camera actuator is configured to perform an auto focusing or zoom function, and
• wherein the second camera actuator is configured to perform an OIS (Optical Image Stabilizer) function,
• wherein the first camera actuator includes:
• a housing;
• a first lens unit;
• a first lens barrel;
• a second lens barrel;
• a first driving unit coupled to the first lens barrel in the housing and configured to move the first lens barrel in an optical axis direction;
• and
• a second driving unit coupled to the second lens barrel in the housing and configured to move the second lens barrel in the optical axis direction,
• wherein the first lens unit, the first lens barrel, and the second lens barrel are arranged sequentially in the housing in the optical axis direction,
• wherein the first lens barrel includes:
• a first side surface facing the first lens unit;
• a second side surface facing the second lens barrel;
• a third side surface orthogonal to the first side surface and the second side surface;
• a first upper surface orthogonal to the first side surface and the second side surface;
• and
• a first lower surface on a side opposite the first upper surface,
• wherein the second lens barrel includes:
• a fourth side surface facing the first lens barrel;
• a fifth side surface on a side opposite the fourth side surface;
• a sixth side surface orthogonal to the fourth side surface and the fifth side surface;
• a second upper surface orthogonal to the fourth side surface and the fifth side surface;
• and
• a second lower surface on a side opposite the second upper surface, wherein each of the surfaces of the first lens barrel and the second lens barrel face inner surfaces of the housing,
• wherein the first upper surface of the first lens barrel includes a first stepped portion extending from the first side surface to the second side surface,
• wherein the second lower surface of the second lens barrel includes a second stepped portion, the second stepped portion configured to divide the second lower surface into a first second lower surface having a first height and a second second lower surface having a second height different from the first height,
• wherein a first distance from the sixth side surface of the second lens barrel to the second stepped portion is different from a second distance from the third side surface of the first lens barrel to the first stepped portion,
• wherein the housing includes a guide disposed on an inner lower surface of the housing, and
• wherein the guide is a protrusion that protrudes in a direction towards the second upper surface of the second lens barrel, the guide extending in the optical axis direction and is located in a region corresponding to the second stepped portion to come into contact with the second stepped portion.