Insertable/removable mechanism for a lens tube body has a rotatable ring with a groove to transfer a turning effect, a guide ring and a peripheral slot

摘要

A guide ring (GR) (14) fits in a ring (15) in a torque-proof manner and has a peripheral slot (PS) (14e-1) that runs diagonally to the direction of the GR's periphery and to an optical axis. The PS joins a diagonal slot (DS) (14e-3). A driven element has a catch (32) to engage the PS, the DS and a groove (15f) to transfer turning effect.