Multi-angle joint structure

The invention relates to a mechanical movable connecting structure, in particular to a mechanical joint connecting structure which can be locked in a multi-angled way. A central shaft is coaxially provided with a fixed wheel which is circumferentially fixed with the central shaft and a rotary wheel which is rotationally connected with the central shaft. The rotary wheel is coaxially nested on the central shaft through a central hole, the inner wall of which is provided with a plurality of keyways. A reset spring is arranged between the bottom of an active key which is arranged inside the groove of the central shaft and the bottom of the groove. Under the pushing force of the reset spring, part of the top of the active key can enter into the inner wall keyway of the central hole of the rotary wheel so that a pusher, which can make the active key leave the inner wall keyway of the central hole of the rotary wheel, can contact the top of the active key, and the pusher is actively connected with the fixed wheel i