Supporting module and electronic device using the same

An electronic device comprising:

• a first body;
• a second body;
• and
• a supporting module disposed between the first body and the second body, the supporting module including:
• a guide rail fastened to the first body and having a first side wall and a second side wall facing each other, the first side wall having a plurality of first recessed portions, the second side wall having a plurality of second recessed portion in a one-to-one correspondence with the first recessed portions, each of the first recessed portions and the corresponding second recessed portion being recessed in opposite directions to allow the guide rail to have different width along a first direction;
• a sliding element slidably disposed at the guide rail along the first direction;
• an elastic element disposed at the sliding element and positioned between the first side wall and the second side wall of the guide rail;
• and
• a supporting unit, two ends of the supporting unit being rotatably disposed at the sliding element and the second body around a second direction vertical with the first direction, respectively,
• wherein when the first body and the second body approach or are far away from each other along the guide rail, the supporting unit rotates relative to the first body and the second body around the second direction, the sliding element slides in the guide rail along the first direction, and the elastic element is positioned between one of the first recessed portions and the corresponding second recessed portion, thus positioning the first body and the second body.