| 摘要 |
A gymnastics springboard with adjustable elasticity comprising a top board coated with a coating subdivided into two distinct zones enabling the impact zone to be demarcated visually, which presents a homogeneous and flexible structure with a hardness able to be adjusted by means of: a curved intermediate plate articulated on the frame at its bottom end by a hinge and bearing by rolling means at its top end under the middle of the impact zone of the board, an adjustable support bar cooperating with the curved intermediate plate between two longitudinal positions by maneuvering actuating member, said bar being guided by rails in the hole of the frame, and a system for quick addition or removal of springs positioned underneath the frame by a combined compression and rotation movement through the oblong holes.
|
