Retractable Structure - Experiment 3-1

Lock - A double-sided lock designed with a mechanical structure. Unlike a conventional lock, it acts more like a lid and the exposed structure gives a clear view of how the lock operates.

The two circular gears drive the linear reciprocating motion of the straight gear, the large inner ring gear drives the rotation of the two small circular gears and the outer gear interacts with the other outer gear, thereby achieving a double-directional linear reciprocating motion.