Provided are a cooling device and an electric vehicle using the cooling device. A plurality of mounting apertures are formed, equally distanced from the center of each of the upper and lower mounting plates which receive the pins of upper and lower attachment brackets which are attached to the upper and lower surface of each door to be mounted. Therefore, a high quality signal can be distributed and outputted without being adversely affected by a digital signal. The inner frame releasably connects the hinge body to a mounting plate. 4 gin; a second section comprising a second material and having a butt end and a second joint end, said second joint end being connected to said first joint end; wherein said second material is less dense than said first material; and wherein said first material has a shear modulus greater than that of said second material.