| 摘要 |
<p>The invention relates to a bed mattress that has an upper part (1), a side part (2), a middle part (3) and a lower part. The middle part (3) that connects the upper part (1) and the side part (2) is shaped like a bellows. A first end of the bellows is connected to the upper part (1) and a second end of the bellows is connected to the side part (2); a middle part of the bellows constitutes a fold toward the inside of the mattress, the bellows being shaped in such a way that the bellows is folded parallel to the upper part (1). The bellows is made of three-dimensional fabric.</p> |
