Switchboard provided with cooling unit

A switchboard comprising:

• a housing having an inner space, an air inlet formed at one side thereof, and an air outlet formed at another side thereof;
• a heat source disposed at one side of the inner space;
• a support plate disposed in the inner space;
• a cooling unit configured to introduce an external air through the air inlet into the inner space of the housing and discharge an exhaust air from the inner space through the air outlet to an outside of the housing, the cooling unit comprising:
• a case having a bottom unit and a front wall formed at a front side of the bottom unit;
• a case handle formed at a front side of the front wall;
• a cooling fan disposed at one side of an upper surface of the bottom unit so as to form a flow of the external air into the inner space;
• and
• a terminal protruding rearwards from a rear surface of the case to be electrically connectable to a power source inside the housing,
• wherein the cooling unit is coupled to the support plate to enter and exit the inner space;
• a coupling unit for guiding the bottom unit to slide forward and backward on an upper surface of the support plate;
• and
• a movement adjusting unit for adjusting a sliding motion of the bottom unit, wherein the movement adjusting unit comprises:
• a first bracket disposed at one side of the front wall of the bottom unit,
• a rotating shaft coupled to the first bracket so as to be rotatably disposed in a forward and backward direction and having a screw thread formed on an outer circumferential surface thereof,
• a screw rack disposed on the upper surface of the support plate so as to couple to a lower side of the screw thread, and
• a detachable handle detachably coupled to the front side of the bottom unit to rotate the rotating shaft,
• wherein an opening is formed through the bottom unit, one side of the screw thread of the rotating shaft protrudes below the bottom unit through the opening and is coupled to the screw rack, and
• wherein the terminal is electrically connected to the power source inside the housing when the screw rack is positioned at a front end of the screw thread by rotating the detachable handle in one direction, and the terminal is separated from the power source when the screw rack is disengaged from a rear end of the screw thread by rotating the detachable handle in an opposite direction.