| 摘要 |
PURPOSE: A steering wheel heater is provided to simplify the structure thereof by not requiring a temperature sensor and a controller. CONSTITUTION: A steering wheel heater is formed by winding a sheet-shaped PTC(positive temperature coefficient) heater(10) around a steering wheel body portion. The PTC heater comprises a base layer(11), a PTC material layer(12), and electrodes(13,14). The base layer surrounds the PTC material layer and the electrodes. The PTC material layer is fixed to one surface of the base layer. The electrodes are fixed to one surface of the base layer to touch the PTC material layer.
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