| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller assembly equipped with a body member. SOLUTION: This roller assembly comprises a first roller rim fixed to the body member. The first roller rim comprises (1) a first inner sidewall segment extending outside from the roller surface, (2) a second outer sidewall segment fixed to the first inner sidewall segment, the first outer sidewall segment being relatively positioned to the rotating shaft of the body member, whereby the straight extension of the first outer sidewall segment crosses the rotating axis to form an acute angle between them; and (3) a receptacle constituted therein. The roller assembly further comprises an axle mounting device positioned in the receptacle to prevent the transverse of the axle mounting device on a first plane.
|
