| 摘要 |
PURPOSE: Provided is a collapsible mattress comprising several unit mattresses from a first unit mattress to a sixth mattress which are of different sizes and colors. It has increased slip resistance and acupuncture therapy effect on the foot when the user steps thereon. CONSTITUTION: The collapsible mattress comprises: a second unit mattress(20) with a ratio of width to length being 4:4; a third unit mattress(30) with a ratio width to length being 4:2; a fourth unit mattress with a ratio width to length being 2:2; a fifth unit mattress with a ratio of width to length being 2:1; and a sixth unit mattress of an isosceles triangle having an orthogonal side equal to the length of one side of the first unit mattress, based on the first unit mattress. An assemble ring(74) and a protrusion(76) are formed on side face part of from the first to sixth unit mattress.
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