| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an easily usable heater for a keyboard instrument, for warming a cooled keyboard in winter, enabling comfortable performance or practice of the keyboard instrument such as a piano or the like and protecting of performers' fingers, without requiring an additional work on the keyboard instrument body. SOLUTION: A sheet-shaped electric heater 1a having flexibility is installed so as to cover a keyboard 2a. When the heater 1a is put on the keyboard 2a and a current is carried, the keyboard 2a is warmed gradually by heat conduction, radiation heat and convection heat from the heater 1a.</p> |
