Non-return mechanism and synchronous motor using same

The utility model relates to a non-return mechanism and a synchronous motor using the same. The non-return mechanism comprises a non-return claw, a claw pole plate matched with the non-return claw, and a supporting part which is arranged on the matching end face of the non-return claw and the claw pole plate and is used for supporting the non-return claw on the claw pole plate. According to the utility model, the risk of non-return failure can be reduced, thereby ensuring the directional rotation of the synchronous motor. 本实用新型涉及一种止逆机构及使用其的同步电机，包括止逆爪、与止逆爪配接的爪极板，以及在所述止逆爪与爪极板的配合端面设有的用于将止逆爪支承在爪极板上的支承部。本实用新型可以降低止逆失效的风险，从而保证同步电机的定向转动。