A bracket device, comprising: a supporting frame; a bracket comprising a longitudinal wall, an end wall and a mounting member, the end wall being bent from and perpendicular to the longitudinal wall, the mounting member being located at the end wall and arranged adjacent to the longitudinal wall; a fastening member pivotally connected to the bracket through a pin, the fastening member comprising two parts (72, 74), one of the two parts (72, 74) comprising a fastening section; and an elastic member configured to provide an elastic force to the fastening member; wherein when the fastening member is in a predetermined state in responding to the elastic force of the elastic member, the fastening section is adjacent to the mounting member; wherein when the fastening member is rotated in a first direction from the predetermined state, the fastening section moves away from the mounting member; characterized in that: the longitudinal wall is fixed to the supporting frame in a riveting or welding manner, or the longitudinal wall and the supporting frame are integrated with each other; wherein the bracket device further comprises two blocking features arranged on a rotation path of the fastening member in a second direction along which the fastening member is rotated, the first direction is opposite to the second direction, the two blocking features are respectively a surface of a first bending wall of the supporting frame and a surface of a blocking wall of the bracket, and the blocking wall extends a predetermined height from the longitudinal wall of the bracket; wherein when the fastening member is in the predetermined state, the surface of the first bending wall of the supporting frame and the surface of the blocking wall of the bracket are respectively located beside the two parts (72, 74) of the fastening member for blocking the two parts (72, 74) of the fastening member, so as to prevent the fastening member from rotating in the second direction from the predetermined state. a supporting frame; a bracket comprising a longitudinal wall, an end wall and a mounting member, the end wall being bent from and perpendicular to the longitudinal wall, the mounting member being located at the end wall and arranged adjacent to the longitudinal wall; a fastening member pivotally connected to the bracket through a pin, the fastening member comprising two parts (72, 74), one of the two parts (72, 74) comprising a fastening section; and an elastic member configured to provide an elastic force to the fastening member; wherein when the fastening member is in a predetermined state in responding to the elastic force of the elastic member, the fastening section is adjacent to the mounting member; wherein when the fastening member is rotated in a first direction from the predetermined state, the fastening section moves away from the mounting member; characterized in that: the longitudinal wall is fixed to the supporting frame in a riveting or welding manner, or the longitudinal wall and the supporting frame are integrated with each other; wherein the bracket device further comprises two blocking features arranged on a rotation path of the fastening member in a second direction along which the fastening member is rotated, the first direction is opposite to the second direction, the two blocking features are respectively a surface of a first bending wall of the supporting frame and a surface of a blocking wall of the bracket, and the blocking wall extends a predetermined height from the longitudinal wall of the bracket; wherein when the fastening member is in the predetermined state, the surface of the first bending wall of the supporting frame and the surface of the blocking wall of the bracket are respectively located beside the two parts (72, 74) of the fastening member for blocking the two parts (72, 74) of the fastening member, so as to prevent the fastening member from rotating in the second direction from the predetermined state. the longitudinal wall is fixed to the supporting frame in a riveting or welding manner, or the longitudinal wall and the supporting frame are integrated with each other; wherein the bracket device further comprises two blocking features arranged on a rotation path of the fastening member in a second direction along which the fastening member is rotated, the first direction is opposite to the second direction, the two blocking features are respectively a surface of a first bending wall of the supporting frame and a surface of a blocking wall of the bracket, and the blocking wall extends a predetermined height from the longitudinal wall of the bracket; wherein when the fastening member is in the predetermined state, the surface of the first bending wall of the supporting frame and the surface of the blocking wall of the bracket are respectively located beside the two parts (72, 74) of the fastening member for blocking the two parts (72, 74) of the fastening member, so as to prevent the fastening member from rotating in the second direction from the predetermined state.