Camera gimbal

1. A camera gimbal, comprising:

a gimbal barrel;

a lens barrel configured to support a camera module thereon, and assembled to the gimbal barrel;

a connection unit configured to interconnect the gimbal barrel and the lens barrel, wherein the lens barrel is connected to be freely rotatable; and

a drive unit disposed on the lens barrel to provide a force that adjusts a pitching movement of the lens barrel,

wherein the connection unit provides a rolling axis, a yawing axis, and a pitching axis of the lens barrel,

wherein the lens barrel assembled to the connection unit is configured to maintain a horizontal posture by gravity, and

wherein the lens barrel is controlled to be rotatable to a state of being suspended from the connection unit of the gimbal barrel by a weight of the drive unit.

2. The camera gimbal of claim 1 , wherein the drive unit is configured to maintain a horizontal posture by gravity.

3. The camera gimbal of claim 2 , wherein the drive unit adjusts the pitching movement of the lens barrel depending on a movement of a center of gravity of the lens barrel.

4. The camera gimbal of claim 1 , wherein the drive unit includes a drive motor, and a center of gravity of the lens barrel is moved by an operation of the drive motor.

5. The camera gimbal of claim 4 , wherein the drive unit comprises:

a gear shaft disposed on a rotation shaft of the drive motor; and

a weight disposed to be engaged with the gear shaft to move forward or backward along the gear shaft.

6. The camera gimbal of claim 5 , wherein the weight has an external appearance in a rectangular parallelepiped shape, and has an opening, through which the gear shaft passes, at a center thereof.

7. The camera gimbal of claim 6 , wherein the weight includes a plurality of gear teeth on an inner surface of the opening to be engaged with the gear shaft.

8. The camera gimbal of claim 1 , wherein the connection unit comprises a universal joint.

9. The camera gimbal of claim 8 , wherein the universal joint includes a spherical coupling structure.

10. The camera gimbal of claim 1 , wherein the connection unit, which provides each of the rolling axis, the yawing axis, and a pitching axis, is spaced apart from the drive unit.

11. The camera gimbal of claim 1 , wherein the driving unit is not disposed along each of the rolling axis, the yawing axis, and a pitching axis.

12. The camera gimbal of claim 5 , wherein a photographing angle of the camera module is adjusted depending on the movement of the weight.

13. The camera gimbal of claim 1 , wherein the camera module is disposed on an upper portion of the lens barrel, the drive unit is disposed on a lower portion of the lens barrel, and the connection unit is disposed between the camera module and the drive unit.

14. The camera gimbal of claim 1 , wherein a center of gravity of the lens barrel is positioned on the connection unit.

15. The camera gimbal of claim 1 , wherein the gimbal barrel is fixed to an unmanned air vehicle.

16. A camera gimbal, comprising:

a gimbal barrel;

a lens barrel assembled to the gimbal barrel;

a connection unit configured to interconnect the gimbal barrel and the lens barrel, wherein the lens barrel is connected to be rotatable along a plurality of rotation axes; and

a drive unit disposed on the lens barrel and configured to adjust a photographing angle of the lens barrel,

wherein the lens barrel is connected to be suspended from the gimbal barrel by the connection unit and is configured to maintain a horizontal posture by gravity, and

wherein the drive unit includes a weight, and the photographing angle of the lens barrel is adjusted depending on the movement of the weight.

17. The camera gimbal of claim 16 , wherein the drive unit includes a single drive motor, and the drive motor is configured to provide a force to move the weight.