What's the name of the shelf that the camera is pushing?

There are three kinds of shelves where the lens is pushed: small rocker arm, elevator and cannon. The arm head only has a camera, and the machine is controlled by hand, which is called a small rocker arm. The photographer sits on the arm with a ball bowl on it. It's called an elevator. You can put the camera's pan/tilt in it. The aperture, zoom and focus of the camera are controlled by the electronic control part. The arm is only on the machine, and those who are not on the machine are called cannons.