Universal adjuster

A universal adjuster, comprising:

• a pivot rod, comprising a center axis;
• two clamping housings, disposed to surround the pivot rod by two sides of the center axis and maintain a gap to jointly form a clamping ring, the clamping ring comprising a first rotational degree of freedom relative to the pivot rod, the first rotational degree of freedom rotating around the center axis, and two sides of the clamping ring respectively provided with a circular outer surface;
• two C-shaped rings, respectively sleeving on the two circular outer surfaces to be rotatable to comprise a second rotational degree of freedom, a rotational axis of the second rotational degree of freedom being perpendicular to a rotational axis of the first rotational degree of freedom, each of the two C-shaped rings being provided with a fixed end and a pressed end located on two ends thereof, and a spacing formed between the fixed end and the pressed end;
• two side housings, covering the clamping ring and jointly assembled to form an outer housing, and each of the two side housings provided with an accommodation space for accommodating one of the two C-shaped rings, each of the two side housings provided with a flange in the accommodation space, and the flange abutting against a side of the fixed end opposite to the pressed end;
• a pressing column, disposed in the outer housing, and the pressing column simultaneously pressing sides of the two pressed ends of the two C-shaped rings opposite to the fixed ends;
• and
• a locking operating element, spirally passed through the outer housing and abutted against the pressing column, and the pressed end of each of the two C-shaped rings being pressed by the pressing column to make the outer housing move together with the two C-shaped rings, and the spacing of each of the two C-shaped rings is shortened to tighten the clamping ring by the two C-shaped rings.