| 摘要 |
An accessory an accessory includes an apparatus-side detachably attaching portion including an accessory-side apparatus detachably attaching portion to be attached to the apparatus-side detachably attaching portion, the accessory-side apparatus detachably attaching portion including an attachment/detachment surface, an internally threaded portion open on the attachment/detachment surface, and an externally threaded member to be rotatably engaged with the internally threaded portion. The externally threaded member is positioned either in a retraction position by rotation of the externally threaded member in one direction or in an extension position by rotation of the externally threaded member in an other direction opposite to the one direction. The retraction position is a position in which a lead end portion of the externally threaded portion of the externally threaded member is retracted into the internally threaded portion and the externally threaded portion is exposed on the attachment/detachment surface. The extension position is a position in which the lead end portion of the externally threaded member is extended from the attachment/detachment surface.
|
