Support device between the sole of a boot and a piece of sports apparatus

A support device arranged between a sole of a boot and a piece of sports apparatus, the piece of sports apparatus having an upper surface and a longitudinally extending axis, and the piece of sports apparatus carrying a toe clamp and a heel clamp holding the boot on the piece of sports apparatus and a coupling device formed by a spacer member coupling the clamps to each other and being freely movable vertically relative to the upper surface, and the support device comprising

• (a) a housing secured by means of an articulation arrangement to the piece of sports apparatus and having an end section facing one of the clamps, the one clamp being displaceable in the direction of the longitudinally extending axis,
• (1) the housing end section being mounted on the piece of sports apparatus in a predetermined vertical position relative to the upper surface, and an opposite housing end section being held by the freely movable spacer member, the opposite housing end section being freely movable vertically relative to the upper surface with the spacer member, and
• (b) a sole support plate freely slidably mounted on the opposite housing end section for relative displacement independently of any displacement of the one clamp along a displacement path transversely to the longitudinally extending axis against a bias of a spring means holding the sole support plate in a rest position.