Camera accessory, camera accessory mount, camera body and camera body mount

Patent metadata

Field	Value
Publication number	US-9645476-B2
Application number	US-201615211395-A
Country	US
Kind code	B2
Filing date	Jul 15, 2016
Priority date	Sep 6, 2010
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A camera accessory can be detachably engaged with a camera body that includes a camera body mount, and is equipped with an accessory mount assuming a bayonet structure with a first tab, a second tab and a third tab set over intervals in a circumferential direction running along a circumference of a circle and projecting from the circumference along a radial direction. The accessory mount can be inserted through the camera body mount without any of the first through third tabs being hindered by any of three camera body-side tabs at the camera body mount, as long as the accessory mount is inserted into the camera body mount at a correct interlock phase. The accessory mount includes a restricting member disposed near the third tab.

First claim

What is claimed is:

1. An accessory that can be engaged by a rotating action in a predetermined direction, with a camera body that includes a body-side mount assuming a bayonet structure having a plurality of body-side tabs, the accessory comprising:
a plurality of accessory-side tabs having different lengths from each other along the predetermined direction, that transfers from a first state at which the plurality of accessory-side tabs are inserted between the plurality of body-side tabs, to a second state at which the plurality of accessory-side tabs engage the plurality of body-side tabs through the rotating action in the predetermined direction; and
a restricting member disposed at a third longest tab among the plurality of accessory-side tabs, that restricts movement in the predetermined direction by abutting a corresponding body-side tab of the plurality of body-side tabs.

2. The accessory according to claim 1 , wherein
the restricting member abuts the corresponding body-side tab when rotated in the predetermined direction by 40.5 degrees from the first state.

3. The accessory according to claim 2 , wherein
the restricting member is disposed so that at least part of the restricting member overlaps with the third longest tab in a direction parallel to an axis of the rotating action in the predetermined direction.

4. An accessory that can be engaged by a rotating action in a predetermined direction, with a camera body that includes a body-side mount assuming a bayonet structure having a plurality of body-side tabs, the accessory comprising:
a plurality of accessory-side tabs that transfers from a first state at which the plurality of accessory-side tabs are inserted between the plurality of body-side tabs, to a second state at which the plurality of accessory-side tabs engage the plurality of body-side tabs through the rotating action in the predetermined direction; and
a restricting member that abuts a corresponding body-side tab of the plurality of body-side tabs when rotated in the predetermined direction by 40.5 degrees from the first state, wherein
the plurality of accessory-side tabs differ from each other in terms of length along the predetermined direction, and
the restricting member is disposed at a comparatively short accessory-side tab among the plurality of accessory-side tabs.

Assignees

• Nikon Corp

Inventors

• Hasuda Masanori
• Kotani Noriyasu
• Hoshikawa Hideaki

Classifications

• G03B17/566 Primary

  Accessory clips, holders, shoes to attach accessories to camera (if integral part of camera body G03B17/02) · CPC title

• G03B17/14 Primary

  interchangeably · CPC title

• G03B17/565 Primary

  Optical accessories, e.g. converters for close-up photography, tele-convertors, wide-angle convertors · CPC title