To provide a planar heating element and a vehicle seat which can suppress an increase in an electric resistance value even when the planar heating element is elongated by seating.SOLUTION: A planar heating element includes a linear conductive layer formed on a planar insulation layer. The conductive layer has a waveform structure part 31 extending in a trapezoidal waveform shape. The waveform structure part 31 includes first areas 32, 34 extending in an extension direction of the waveform structure part, and second areas 33, 35 extending in an intersection direction of the extension direction of the first areas 32, 34. In the waveform structure part 31, a ratio between a length L1 of the first areas 32, 34 and a length L2 of the second areas 33, 35 (L2/L1) is 1 or more.SELECTED DRAWING: Figure 8
【課題】着座により面状発熱体が伸長した場合でも電気抵抗値の上昇を抑制することができる、面状発熱体および乗物用シートを提供する。【解決手段】線状の導電層が面状の絶縁層の上に形成された面状発熱体であって、導電層は台形波形状に延在する波形構造部31を有し、波形構造部31は、前記波形構造部の延在方向に延在する第1領域32,34と、第1領域32,34の延在方向と交差する方向に延在する第2領域33,35と、を有し、波形構造部31において、第1領域32,34の長さL1と第2領域33,35の長さL2との比(L2/L1)が1以上である、面状発熱体。【選択図】図8
PLANAR HEATING ELEMENT AND VEHICLE SEAT
面状発熱体および乗物用シート
2020-09-17
Patent
Electronic Resource
Japanese
PLANAR HEATING ELEMENT, STEERING WHEEL, AND VEHICLE SEAT
European Patent Office | 2018
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