SPRING DEVICE

The spring device includes a part using the resilient properties of the material from which the part is made. There are at least two opposite points or areas, which are to be biased. The device includes, between the points or areas, an intermediate portion including a mesh structure resulting from the assembly of optionally rectilinear segments, at least two of which lie in separate planes, both outside of the direction of bias. During the biasing, one segment is longitudinally biased by compression and the other is longitudinally biased by pulling.