This creation is about a screwing mechanism, which includes a uniform moving part and a turning part. When the rotary member rotates in a first direction, the two abutting ribs of the rotary member respectively abut the third positions of the two elastic arms of the actuating member, and one of the ratchet teeth of the actuating member is located at the first position and leans against Away from a central axis portion of the actuating member； when the rotary member rotates in a second direction, the two abutment ribs of the rotary member respectively abut the fourth position of the two elastic arms of the actuator, and the ratchet The teeth are located in the second position near the central shaft portion.本創作關於一種旋緊機構，其包括一致動件及一旋調件。該旋調件朝一第一方向旋轉時，該旋調件之二抵肋分別抵於該致動件之二彈臂的第三位置，該致動件之一棘齒位於該第一位置而靠遠離該致動件之一中心軸部；該旋調件朝一第二方向旋轉時，該旋調件之該二抵肋分別抵於該致動件之該二彈臂的第四位置，該棘齒位於該第二位置而靠近該中心軸部。
