a connector configured to be coupled to a device having a power source to receive power from the power source of the device;

a main frame supporting a power receiving part;

power transmission cables disposed on one side of the main frame and configured to transmit power to a bendable section;

a rotating structure rotatably coupled to the main frame and configured to receive rotational force in response to a movement of the slider; and

a chain-slider assembly configured to work in concert with the rotating structure to transmit power to the power transmission cables,

wherein the main frame comprises a vertical frame and a horizontal frame, the power receiving part is supported on the vertical frame, and the rotating structure and the chain-slider assembly are disposed on the horizontal frame,

wherein the connector comprises the power receiving part comprising a slider configured to move by receiving power from the power source of the device and a sliding rail on which the slider moves, and stoppers provided on both ends of the sliding rail to limit a range of power reception of the power receiving part so that a bending angle of a bendable section is allowed within a predetermined range even in a case that the power source malfunctions,

wherein the slider moves on the sliding rail in a first direction or a second direction,

a first slider and a first sliding rail have a rail structure allowing the first slider to move thereon within the first sliding rail,

the connector is coupled to the device in a direction different from the first direction and the second direction, and

a rear support is provided to support the slider from behind in order so that when the connector is coupled to the device in a different direction, a backward movement of the slider that has been pushed backward due to a gap of the rail structure is stopped at a predetermined position, whereby the rail structure is protected.