| 摘要 |
A mattress spring structure ( 10 ) is provided with a strengthened central area (C) thereon to provide greater support for a user's body lumbar region when received thereon. The support is provided with a strengthening structure ( 30 ) having a continuous frame member ( 54 ) and a strengthening pattern ( 53 ). The continuous frame ( 54 ) encircles coil springs ( 12 ) over a major expanse of the mattress's central area (C); this frame is connected to mattress coils along the frames longitudinal ( 34, 36 ) and traverse ( 38, 40 ) segments. The strengthening pattern ( 53 ) has two metal bars ( 51, 52 ) arranged inside and connected to the continuous frame member ( 54 ). The strengthening pattern ( 53 ) may be connected to the spring coils ( 12 ) and contain additional metal straps ( 56, 59 ). The strengthening structure ( 30 ) is positioned and arranged to causes substantially uniform depression of adjacent coil springs to the continuous frame member ( 54 ) in the lumbar zone thereby eliminating any undesired upward pressure into the user's back.
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