Patent ID: 9729769
Date: 2017-08-08
CPC Classifications: G03B,H04N

Claim:
1. A camera comprising: a first mount to which a second mount disposed in a camera accessory including an actuator is detachably coupled, wherein the camera is communicable with the coupled camera accessory, wherein the first mount is configured to shift from a first state to a second state, the first state being such a state that a second bayonet tooth disposed in the second mount is inserted between a plurality of first bayonet teeth disposed in the first mount, the second state being such a state that a relative rotation between the first mount and the second mount causes the first bayonet teeth and the second bayonet tooth to be engaged with each other to complete coupling between the first mount and the second mount, wherein a first contact holding portion disposed in the first mount holds first, second, third and fourth contact pins disposed along a rotational direction of the second mount and the first mount, and the first, second, third and fourth contact pins are disposed adjacent to each other and are disposed in the order of the first, second, third and fourth contact pins, wherein, in the second state, the first, second, and third contact pins are in contact with first, second, and third electrical contact surfaces held by a second contact holding portion disposed in the second mount, respectively, whereby an electric connection is established between the camera and the camera accessory, wherein the first, second, and third contact pins are disposed in such a manner that, when the mount shifts from the first state to the second state, the third contact pin contacts the first and second electrical contact surfaces, the second contact pin contacts the first electrical contact surface, and the first pin does not contact the second and third electrical contact surfaces, and a sixth contact pin, wherein the first contact pin is a pin for detecting that the camera accessory is coupled to the camera, the second contact pin is a pin for supplying electrical power for communication to the coupled camera accessory, and the third contact pin is a pin for supplying electrical power for driving the actuator of the camera accessory, wherein the fourth contact pin is used for indicating a reference potential corresponding to the electrical power supplied from the third contact pin, and the sixth contact pin is used for indicating a reference potential corresponding to the electric power from the second contact pin.