| 摘要 |
The roller skate consists of a main frame (1) with two side plates, between which the rollers (2, 3, 4, 5) are fitted, and an auxiliary inverted U-shaped frame (8) on which the boot is mounted, the auxiliary frame being pivoted to the main one about an axis parallel to the axes of the wheels. The auxiliary frame is pivoted to the main frame by means of two stepped discs (12) which are fixed to the outer surfaces of the main frame. The discs and matching apertures in the auxiliary frame are mounted on the main frame with their smaller sides facing inwards. Each of the discs is fastened in place by a roller axle nut and an auxiliary screw.
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