Patent ID: 8393807

Claim:
A camera accessory that can be detachably engaged with a camera body that is equipped with a camera body mount including three camera body-side tabs, the camera accessory comprising an accessory mount assuming a bayonet structure, wherein: the camera accessory mount comprises (i) a first tab, a second tab, and a third tab arranged at intervals along a circumferential direction and projecting from an inner side of the accessory toward an outer side, and (ii) a first gap, a second gap, and a third gap arranged at intervals along the circumferential direction; the first tab, the second tab and the third tab extend along varying lengths along the circumferential direction; the first tab extends over a greatest length along the circumferential direction, and the third tab extends over a shortest length along the circumferential direction; the first gap, the second gap, and the third gap extend along varying lengths along the circumferential direction; the first gap extends over a greatest length along the circumferential direction, and the third gap extends over a shortest length along the circumferential direction; the third gap is arranged between the first tab and the third tab, the first gap is arranged between the first tab and the second tab, and the second gap is arranged between the second tab and the third tab; the first tab, the second tab and the third tab include first side ends, which are leading ends of the first tab, the second tab and the third tab rotated in a mounting direction along the circumferential direction in order to engage the accessory mount, inserted at the correct interlock phase with respect to the camera body mount, with the camera body mount, and second side ends located on a side opposite from the first side ends; and when the first tab and either the second or third tab mutually come into contact with two of the three of the camera body-side tabs, and there are a total of two contact locations between the camera-body-side tab and the accessory-side tab, the first tab, the second tab, and the third tab are arranged on the accessory mount such that the contact achieved by the first tab is located near the second side end thereof.