| 摘要 |
A roller skate has a sole plate having a front oblong hole, a rear oblong hole, and a middle block. The sole plate has a round aperture, a threaded hole, and a circu- lar aperture. The middle block has a round hole and a through hole. The hollow bottom casing has a front slot, a rear slot, and a bore. The first wheel support seat has a first U-shaped frame, and a first insertion plate having a first circular hole. The second wheel support seat has a second U-shaped frame, and a second insertion plate having a second circular hole. The through hole of the middle block receives the first insertion plate and the second insertion plate. The first shaft is inserted through the round aperture and the first circular hole. The second shaft is inserted through the circular aperture and the second circular hole. The positioning tube engages with the threaded hole. The blocking device is inserted through the round hole.
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