| 摘要 |
A castor includes a wheel frame, a roller, an elastic locating plate, a mandrel, a locating disk, a braking disk, a mounting tube, an elastic member, a control bar, two screw members, an adjusting member, and a connecting unit. Thus, the distance between the braking disk and the roller can be adjusted easily and quickly according to the user's requirement, thereby facilitating the user braking the roller. In addition, when the wall thickness of the roller is reduced due to rubbing or wearing, the distance between the braking disk and the roller can be adjusted to fit the wall thickness of the roller, thereby keeping the braking effect of the braking disk to the optimum.
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