| 摘要 |
PROBLEM TO BE SOLVED: To provide a small and light portable hand warmer convenient to carry in which an extended warming time is achieved by improving temperature environment of a battery. SOLUTION: In the portable hand warmer, a heat dissipating plate 4 is thermally coupled to a heater 3 that is supplied with current by a battery 1 accommodated in a case 2. The battery 1 is a rectangular rechargeable battery 1A of a rectangular rechargeable lithium-ion battery or lithium-polymer battery that has flat surfaces 1a opposed to each other. The heater 3 is a heating element that is opposed to the flat surface 1a of the battery 1. A shielding plate 5 is arranged between the heating element and the flat surface 1a of the battery 1. The heat dissipating plate 4 thermally coupled to the heating element is secured to the case 2 on the surface side of the case. In the portable hand warmer, the flat surface 1a of the rectangular rechargeable battery 1A, the shielding plate 5 and the heat dissipating plate 4 are arranged in a stack structure. The heat dissipating plate 4 is heated by the heating element. COPYRIGHT: (C)2008,JPO&INPIT
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