Folding chair and side table thereof

A folding chair, comprising a chair frame, wherein the folding chair further comprises a side table, which comprises:

• a vertical tube configured to be fixed to the chair frame of the folding chair;
• a bent tube having a first bent portion and a second bent portion which are fixedly connected, and the first bent portion being inserted in the vertical tube;
• a side table board rotatably arranged on the second bent portion;
• a first locking mechanism configured to fix the first bent portion in an axial direction and a circumferential direction of the vertical tube;
• and
• a second locking mechanism configured to fix the side table board to the second bent portion,
• wherein the second locking mechanism comprises:
• a toothed wheel coaxially arranged with the second bent portion;
• a fixing block fixedly arranged on the side table board and having a first receiving groove for receiving the toothed wheel, wherein, a side wall of the first receiving groove is provided with internal teeth configured to cooperate with the toothed wheel;
• a locking member fixedly arranged at an end of the second bent portion, wherein an end surface of the locking member is provided with a second receiving groove, and a side wall of the second receiving groove is provided with internal teeth configured to cooperate with the toothed wheel;
• a spring provided between the toothed wheel and a bottom surface of the second receiving groove and being abutted between the toothed wheel and the bottom surface of the second receiving groove;
• and
• a push button arranged at a side, away from the locking member, of the fixing block, and configured to push the toothed wheel to allow the toothed wheel to cooperate with the internal teeth of the first receiving groove and the internal teeth of the second receiving groove.