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Abstract

A semiautomatic rotational/swinging device includes a relative pivoting member, a pivoting member pivotally connected with the relative pivoting member via a pivot pin, and multiple strip-like torsion elastic members each having two end sections connected with the relative pivoting member and the pivoting member respectively. The torsion elastic members are obliquely disposed between the relative pivoting member and the pivoting member around the pivot pin. When the pivoting member and the relative pivoting member are pivotally rotated relative to each other, the end sections of the torsion elastic members are gradually shifted from the original misaligned position to an aligned position. At this time, the torsion elastic members are compressed to store energy. After the end sections pass over the aligned position, the torsion elastic members stretch from the compressed state to push the pivoting member and the relative pivoting member to automatically pivotally rotate relative to each other.

First Claim