Bicycle and supporting frame thereof

A supporting frame, applied on a bicycle, the bicycle comprising a main frame, said supporting frame defining a supporting state and a folded state in relation to the bicycle, and said supporting frame comprising:

• a connector, adapted to be connected to the main frame;
• a front supporting frame assembly, comprising two first pivotal connecting portions and two second pivotal connecting portions, said front supporting frame assembly pivotally connected to the connector via the two first pivotal connecting portions;
• two connecting bars, wherein said two connecting bars both comprise a first connecting end and a second connecting end opposite the first connecting end, and the two first connecting ends are respectively and pivotally connected to the two second pivotal connecting portions;
• and
• two rear supporting frames, wherein said two rear supporting frames both comprise a third pivotal connecting portion, and the two second connecting ends respectively and pivotally connected to the third pivotal connecting portions of the two rear supporting frames;
• when the front supporting frame assembly is turned in a direction toward the connector, the front supporting frame assembly pushes the two connecting bars, so that the two connecting bars drive the two rear supporting frames to turn along a first direction until the front supporting frame assembly touches the connector, resulting in the folded state of the supporting frame;
• when the supporting frame assembly turns in a direction away from the connector, the front supporting frame assembly will push the two connecting bars, so that the two connecting bars will drive the two rear supporting frames to turn along a second direction until the front supporting frame assembly touches a ground, resulting in the supporting state of the supporting frame.