兒童乘坐車用安全座椅可有效減少兒童乘車時的危險，符合人因的兒童車用安全座椅設計應考量座椅之舒適性、透氣性得以維持兒童搭乘時保持良好與安全的姿勢。本研究招募20位學齡前幼童（3至6歲）進行兒童車用安全座椅舒適性評估，探討受試者於9種椅墊組合（3種椅墊厚度以及3種椅墊軟硬度）下的坐姿壓力分佈、皮膚溫度以及椅墊表面溫度之變化作為舒適性評估指標，以了解兒童乘坐車用安全座椅之最佳椅墊組合。為探討受測者主觀乘坐感受，本研究使用兒童適用之主觀感受問卷，收集9種椅墊組合臀部之主觀舒適度、乾濕程度、冷熱程度以及軟硬程度數據，並透過實驗全程攝影記錄觀察受測者的行為模式。最後為進一步了解兒童車用安全座椅椅墊顏色、表皮材質與產品特性對消費者帶來的舒適度觀感，本研究由產品設計觀點出發，對20位受測者之家長進行調查，並使用Kano二維品質模型分析兒童車用安全座椅之產品特性。
綜觀本研究結果顯示，在溫度表現之下，厚度5 mm與硬度10 ILD之兒童車用安全座椅椅墊為最佳組合；在壓力表現之下，厚度15 mm與硬度10 ILD之兒童車用安全座椅椅墊為最佳組合。而主觀感受問卷結果顯示，受測者較偏好厚度15 mm與硬度10 ILD之組合，並透過攝影觀察發現受測者於實驗過程中，出現諸多不舒適導致的行為。最後經由產品材質、顏色與Kano二維品質模型分析，本研究結果有助於提供兒童車用安全座椅製造商在產品設計以及成本考量下有效的數據參考，也能讓消費者在挑選產品時有更明確的方向。

The purpose of child car seats is to protect children while driving. An ergonomic child car seat design should consider comfort, ventilation, posture and safety. Twenty children from three to six years old were recruited to participate the experiment with nine treatment combinations (three thicknesses and three hardness of child car seat cover). Pressure distribution, skin temperature and material surface temperature were collected to find the optimal combination of child car seat cover design.
Besides, we used questionnaires to collect the feeling of children, such as comfort, humidity, temperature and hardness feelings. Children’s behaviors through the process of experiment were recorded by camera. And we also conducted interviews and Kano two-dimension questionnaires with parents to understand the view of consumers about colors, texture and features of child car seats.
The results indicate that child car seat cover with 5 mm thickness and 10 ILD hardness had the best thermal comfort performance. On the other hand, child car seat cover with 15 mm thickness and 10 ILD hardness had the lowest sitting pressure and highest seating comfort. And child car seat cover with 15 mm thickness and 10 ILD hardness had the highest comfort scores. By the film recording, there were noticeable signs of discomfort for most of the children which meant that child car seats still have room to improve. The research findings can provide very useful information
for child car seat design and selection.

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