Mechanism of a DANGAERI doll
A lower, left figure shows a general view of Five Steps DANGAERI doll shown in KARAKURI-ZUI and right figure shows the inside mechanism. But, a direction of before and after of a doll is reversed. In the left figure, a doll goes down a step in sequence while repeating a back flip. A doll repeats a back flip because mercury moves in a pipe shown with two ()--> three ()--> four ()--> five (). However, we call it the "DANGAERI doll" because five steps have no special mechanical meaning.