Do you know how the rear-mounted bucky stand is implemented?

Characterized in that: bucky is located on the side of the column, supported by the rotating frame, one end of the rotating frame is snapped into the sliding slot on one side of the column, and the camera box slides up and down in the sliding slot through the rotating frame, and slides up and down along the vertical direction of the column.

And the bucky is turned in the transverse direction of the column to be 0-180 degrees in the vertical direction of the column, the cassette is directly inserted from the back of the bucky, and is caught between the upper and lower clips, and the upper clip has two coil springs. There are pull wires on both sides of the cassette, the top ends of the pull wires are respectively connected with the coil spring, and the lower end is connected with the lower clip.