Panhead
A panhead which is capable of appropriately operating an image pickup device by a simple mechanism thereof. A fixed unit is set on a base of a camera-attached panhead. A pan rotation unit is supported on the pan fixed unit, for rotation within a plane parallel with the upper surface of the pan fixed unit. Two parallel-link mechanisms connect between a camera unit and the pan rotation unit and move the camera unit to a predetermined position in which a direction of an optical axis of the image pickup device is able to be maintained, depending on the use mode of the camera unit.
1. A panhead comprising:
a fixed unit;
a rotation unit that rotates within a plane parallel with an upper surface of said fixed unit; and
a moving mechanism that connects between an image pickup device and said rotation unit and moves the image pickup device relative to the rotation unit to a predetermined position in which a direction of an optical axis of the image pickup device is able to be maintained, depending on a use mode of the image pickup device;
wherein in a normal use mode of the image pickup device, said moving mechanism moves the image pickup device in accordance with a shift of a center of gravity of the image pickup device to a position where the center of gravity of the image pickup device and a rotational axis of the image pickup device are aligned with each other.
2. A panhead as claimed in claim 1 , wherein the predetermined position is a position where a principal point position of a lens provided in the image pickup device and a rotational axis of the image pickup device are aligned with each other.
3. A panhead as claimed in claim 1 , wherein said moving mechanism is a parallel-link mechanism for changing a position of the image pickup device relative to said rotation unit in parallel with the upper surface of said fixed unit.
4. A panhead as claimed in claim 1 , wherein said moving mechanism is a slide mechanism for changing a position of the image pickup device relative to said rotation unit in parallel with the upper surface of said fixed unit.
5. A panhead as claimed in claim 1 , wherein in a panorama shooting mode of the image pickup device, said moving mechanism moves the image pickup device in accordance with shift of a lens principal point of the image pickup device to a position where a principal point position of the lens provided in the image pickup device and a rotational axis of the image pickup device are aligned with each other.
6. A panhead as claimed in claim 5 , wherein the image pickup device does not move a lens for zooming or focusing, until the moving mechanism terminates the movement of the image pickup device.
7. A panhead as claimed in claim 1 , further comprising a first rotation mechanism for rotating said rotation unit within a plane parallel with the upper surface of said fixed unit, and a second rotation mechanism for rotating the image pickup device about an axis parallel with the upper surface of said fixed unit.