Signal transmission device in an intermediate lens barrel

摘要

Signal transmission device in an intermediate lens barrel comprises a signal surface, a first inclined surface and a second inclined surface. When the intermediate lens barrel is connected to an objective lens, the signal surface gets in engagement with a signal member on the objective lens barrel and is shifted in the direction of the optical axis. When the intermediate lens barrel is rotated to connect it to a camera, a signal detection member on the camera is guided to the signal surface by the first inclined surface. The second inclined surface guides the detection member to a reference surface on the intermediate lens barrel when the latter is rotated in the direction to disconnect the barrel from the camera.