Patent ID: 7572074

Claim:
A camera-mounting device comprising: a ball shaft having a ball portion and a shaft portion; a case main body provided with a ball-shaft receiver that holds the ball portion of the ball shaft; a press plate that allows the ball shaft to be pressed onto the ball-shaft receiver; and a cam for pressing the press plate in a direction toward the ball shaft by a rotation of a lever, wherein the cam has a first flat portion and a second flat portion that has a distance longer from the rotation center of the cam in comparison with the first flat portion, when the first flat portion of the cam is allowed to press the press plate through the rotation of the lever, the press plate is not allowed to press the ball shaft, and when the second flat portion of the cam is allowed to press the press plate through the rotation of the lever, the press plate is allowed to press the ball shaft so that the ball shaft is sandwiched between the ball-shaft receiver and the press plate to be secured between them.