Patent ID: 7762505

Claim:
A fixing device for fixing optical equipment to an accessory part, comprising: an adapter journal connectable to the optical equipment; and a mounting device connectable to the other accessory part, the mounting device including: an axially movable part having an insert opening configured to receive the adapter journal; a first locking pin and a second locking pin; an upper housing plate coupled to a lower housing plate; a ring turnable around the axially movable part supported on the upper housing plate and the lower housing plate, the ring having a first guide slit and a second guide slit, each guide slit having an inclined surface and an opening in communication with the respective guide slit at an end of the respective guide slit; a locking lever coupled to the ring; a compression spring biasing the axially movable part to protrude beyond the upper housing plate, wherein the mounting device is configured to connect the optical equipment to the upper housing plate via an insertion of the adapter journal into the insert opening by radially sliding the adapter journal on the axially movable part, a retraction of the first and second locking pins into the openings of the first and second guide slits on an upper portion of the ring, and an actuation of the locking lever is configured to rotate the ring so as to urge the axially movable part downward via an engagement of the first and second locking pins with the inclined surfaces of the first and second guide slits.