Electronic control apparatus

An electronic control device comprising:

• a lower cover that includes a first side wall in which a first coupling portion and a second coupling portion are integrally formed and has an open upper portion;
• a circuit board that is provided with, directly on a first upper surface thereof, a button for operating an electronic device, wherein the circuit board is disposed inside the first side wall of the lower cover;
• an intermediate cover that includes a second side wall in which a third coupling portion is integrally formed and that defines a first button hole at a position corresponding to the button, wherein the third coupling portion is directly fastened to the first coupling portion such that, when coupled to the lower cover, the intermediate cover secures the circuit board between a lower surface of the intermediate cover and the lower cover;
• a button cover directly disposed on an upper surface of the intermediate cover, opposite to the lower surface, having a protrusion part at a position that covers at least the first button hole;
• and
• an upper cover that includes a third side wall in which a fourth coupling portion is integrally formed and defines a second button hole through which the protrusion part is disposed, wherein the fourth coupling portion is directly fastened to the second coupling portion such that, when coupled to the lower cover, secures the button cover between a lower surface of the upper cover that faces the upper surface of the intermediate cover and the upper surface of the intermediate cover.