| 摘要 |
Present invention relates to a three -wheeled coaster (1), comprising a platform (10) with a support surface (15) for the user's feet and two coaxial rear wheels (20) and one front wheel (35) attached to the platform (10), said front wheel (35) is pivotable with the steering bar (25) relative to the platform (10) and the steering axle (30) of the steerable wheel (35) is inclined relative to the platform (10). The rear wheels (20) are attached to the platform (10) relative to the front wheel (35) so that the centre of the contact surface of the front wheel (35) on the support surface is situated on the vertex of an imaginary isosceles triangle and the corresponding sides of said triangle from that vertex pass through the corresponding centres of the contact surfaces of the rear wheels (20) and the angle (a) of the vertex of the triangle is between 44 and 71 degrees. |
