SPRING CORE WITH VARIED CHARACTERISTIC OF CORNER SPRINGS

摘要

A spring core (10) comprises a plurality of springs (21, 22) which are arranged in columns and rows. The plurality of springs comprises at least one corner spring (22). The corner spring (22) forms an end of one of the rows and an end of one of the columns. The at least one corner (22) spring differs with respect to at least one characteristic from a first adjacent group of the other springs (21) in the same row and a second adjacent group of the other springs (21) in the same column.