| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to provide a touch feel temperature equal to a resin case and to prevent a low temperature burn while securing heat diffusion, high rigidity and recyclability by using a metal case by providing a thermal insulating layer which suppresses heat transfer to a human body from the metallic case to a part that can come into contact with the human body out of an external surface of the metallic box unit. SOLUTION: A thermal insulating layer is formed by sticking a sheet 10 which consists of a resin, a rubber member or a fiber member on a metallic case 9 outer surface with an adhesive material. Therefore, a lower side of the resin sheet 10 comes into contact with a human body and the human body does not comes into directly contact with the metallic case 9. In addition, since the resin sheet 10 has a thickness more than 100μm and thermal conductivity is below 1 W/mK, smaller than the metallic box unit 9, an amount of overall heat transfer amount passing the human body per unit hour largely decreases. Thus, it is possible to suppress thermal transfer to the human body, and it is possible to obtain a touch feel temperature close to the resin case without feeling instantaneous heat such as in a case of coming into contact with a metal even at the time of coming into contact with the human body.</p> |
