| 摘要 |
Ergonomic mattress made of high-density polyurethane with tree parallel layers joined toeach other at the head and foot of the matress, forming a single block, wherein the upper (1) and the lower (3) layers have an inner face with a sinusoidal profile defining a series of troughs (7, 10) and peaks (11, 8) , between them being an intermediate layer (12) with flat surfaces joined by adhesives and the like to the peaks (11, 8) of the upper (1) and the lower (3) layers, wherein the distribution of the peaks (11, 8) and the troughs (7, 10) of the layers is such that the troughs (7) of the upper layer (1) are opposite the peaks (11) of the lower layer (3) and, therefore, the peaks (8) of the upper layer(l) are opposite the trough (10) of the lower layer (3) , providing a good distribution and homo- genisation of the loads that prevents the upper (1) and lower (3) layers from contacting each other. |
