| 摘要 |
<p>PURPOSE:To prevent the entrance of foreign matters including dust through an air hole 1(a) by closing the air hole 1(a) when heat radiation is not required, in an electronic equipment provided with the air hole 1(a) for heat radiation on case 1 of the equipment main unit. CONSTITUTION:A opening/closing member 2 opening and closing the air hole 1(a) and a motor 3 moving it are provided. When a power supply switch 7a is turned on, a CPU controls the motor 3 to move the opening/closing member 2 to open the air hole 1(a). When the power supply switch 7a is turned off, the motor 3 is closed, the opening/closing member 2 is moved and the air hole 1(a) is closed. Thus, when the power supply is turned off where the heat radiation is not required, the air hole 1(a) is turned off.</p> |
