An electronic apparatus that is capable of properly controlling a cooling fan according to characteristics of a semiconductor device included in the electronic apparatus. A condition is satisfied where, L1 is a distance from an apex of the ellipsoidal mirror to the second focal point thereof and, L2 is a distance from the second focal point of the ellipsoidal mirror to the stop. Still further, in accordance with the present invention there is provided a multi-functional tool that includes a plurality of tools configured to manipulate buttons and zippers disposed on articles of clothing. The eccentric wheel is disposed in the radially eccentric area, and appears entirely in the shape of an eccentric ring, and a planetary gear transmission mechanism with small difference between the number of teeth is constituted by the eccentric wheel, the inner toothed plate and the outer toothed plate. More specifically, the heating of the transition metal complex is completed at a temperature between 400-800 C.