| 摘要 |
The invention refers to an arrangement in a roller-skate, skateboard or roller-ski comprising a frame (2) having a number of wheels (3, 4) and a shoe (5) supported by said frame (2), board or ski, said frame (2) comprises at least one middle wheel (3), which is centrally oriented in position and rotably provided in its longitudinal direction in supporting of the main part of the users weight and at least one rotatably and turnably provided ball-roll or link wheel (4) in the free end portions (6, 7) of the frame (2) in front of and behind the middle wheel (3), said ball-roll or link wheel having a contact surface (8) against a supporting surface, which is immediately above the contact surface (9) of the middle wheel (3) in providing of a tipping function of the frame (2) forwards and backwards via the middle wheel (3) at the same time as the ball-rolls or link wheels (4) are at a distance from the middle wheel (3), which admits 360° turnability of each ball-roll or link wheel (4) and said all wheels (3, 4) having cooperating, individual radies during skating. |
