| 摘要 |
A support unit (100) for use in a mattress or cushion is disclosed. The support unit comprises an array of upright primary coil springs (110) arranged in a series of aligned rows (111) and columns (112) so as to define voids (117) between sets of four adjacent primary coil springs (110). Secondary support elements (120) are located in at least several of the voids (117). Then elements could be springs or foam columns. The support unit may be divided into zones characterised by different density or patterning’s of the secondary support elements. The lower ends of the primary coil springs and secondary support elements all lie substantially in a common plane, such that the upper ends of the secondary support elements lie in a plane below the plane of the upper ends of the primary coil springs. This results in the secondary support elements having no support effect until a load sufficient to compress the primary coil spring by an amount equal to the difference in heights between the primary coil springs and the secondary support elements is achieved. The additional support provided by the secondary support elements is thus only effectively achieved when the support unit is subjected to a heavy local load, either as a result of a heavier body mass of the person lying on the mattress or localised increased load resulting, for example, from a person sitting or standing in a localised area of the support unit. |
