Extendable pivot shaft mechanism, and an extendable pivot shaft mechanism of a camera for pivoting a rotatable grip on a camera body

摘要

An extendable pivot shaft mechanism of a camera for pivoting a rotatable grip on a camera body is provided to allow the rotatable grip both to rotate about a rotational axis and to move along the rotational axis relative to the camera body,;the extendable pivot shaft mechanism includes an inner shaft, a middle cylinder and an outer cylinder which are concentrically arranged about the rotational axis. The inner shaft and the outer cylinder are fixed to one and the other of the grip and the camera body, respectively. One of the inner shaft and the outer cylinder serves as a rotatable shaft element which is rotatable about the rotational axis relative to the middle cylinder. The other of the inner shaft and the outer cylinder serves as a linearly movable shaft element which is linearly movable along the rotational axis relative to the middle cylinder.