Abstract: A one-bolt type junction box includes a main body in which electrical parts are installed, a lower cover configured to cover a lower portion of the main body, sockets installed on a lower surface of the main body, side connectors installed in the lower cover so as to be coupled to the sockets, a single fixing bolt installed in the main body, a single fixing nut provided in the lower cover so as to be threadedly coupled to the fixing bolt, a central connector mounted in a central portion of the junction box in which the fixing bolt and the fixing nut are disposed, and a connector seating member in which the central connector is seated. The central connector is configured to be mounted on the lower cover in a state in which the central connector is seated on the connector seating member.

Abstract: A junction box includes a main body in which circuit components are installed, a lower cover configured to cover a lower portion of the main body, one or more sockets installed on a lower surface of the main body, one or more connectors installed in the lower cover and configured to be coupled to the sockets, a single coupling bolt installed in the main body, and a single coupling nut installed in the lower cover and threadedly coupled to the coupling bolt. When rotationally operating the single coupling bolt, the main body is configured to move up or down with respect to the lower cover so that the sockets are coupled to or decoupled from the connectors while making up/down movement with respect to the connectors.