Turnover mechanism, crib frame, and foldable crib

A turnover mechanism having an unfolding state and a turnover state, comprising:

• a central seat of which a center of a bottom is provided with a support shaft;
• a plurality of sets of connecting members arranged around the central seat and pivotally connected to the central seat, wherein a gear portion is provided at one end that is of the connecting member and that is pivotally connected to the central seat;
• a sliding member sleeved on the support shaft and moving up and down along the support shaft, wherein the sliding member is provided with a rack portion engaged with the gear portion;
• a locking member having a locking position and an unlocking position, wherein when in the locking position, the locking member can prevent the sliding member from moving, and when in the unlocking position, the sliding member can move along the support shaft;
• and
• an unlocking member connected to the locking member so as to switch the locking member between the locking position and the unlocking position,
• wherein the support shaft has an accommodating cavity, and
• wherein the locking member comprises:
• a plurality of rotating pieces centrally symmetrically arranged inside the support shaft and pivotally connected to the support shaft,
• wherein when in the locking position, the rotating piece partially penetrates through the support shaft and abuts against the sliding member, and
• wherein when in the unlocking position, the rotating piece can rotate under the action of the unlocking member and be completely accommodated in the accommodating cavity.