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    • 106. 发明授权
    • Automatic dust-removing eraser of a rolling-friction type for blackboard
    • 用于黑板的滚动摩擦型自动除尘橡皮擦
    • US4596059A
    • 1986-06-24
    • US562184
    • 1983-12-16
    • Wen-Chin Lee
    • Wen-Chin Lee
    • B43L21/02B43L21/00
    • B43L21/02
    • An automatic dust-removing eraser of a rolling-friction type for use on a blackboard includes: a casing body having an open section or cavity in the central portion; a plurality of different guiding slots vertically formed at both ends of the side walls defining the open section; a spare space provided at each end portion with an escape clack valve and a discharge door respectively disposed in the opposing side walls defining the spare spaces; a pair of supporting members each having integrally-linked parallel plates respectively secured in the guiding slots of the casing body; and a plurality of master rollers and slave rollers mounted within the cavity in interrelated coupling; so that, by means of the matched rotation of the master and slave rollers and the unilateral check action effected from the supporting members, the chalk dust gathered by the master rollers over the surface of the blackboard is automatically removed through self-brushing and discharging action of the slave rollers.
    • 用于黑板上的滚动摩擦型自动除尘橡皮擦包括:壳体,其在中心部分具有开口部分或空腔; 多个不同的引导槽,垂直地形成在限定开放部分的侧壁的两端; 在每个端部设置有分别设置在限定备用空间的相对侧壁中的排气门和排放门的备用空间; 一对支撑构件,每个支撑构件具有分别固定在壳体主体的引导槽中的一体连接的平行板; 以及安装在所述腔内的相互联接的多个主辊和从动辊; 使得通过主从轮的匹配旋转和从支撑构件实现的单侧检查动作,由主辊聚集在黑板表面上的白垩粉尘通过自刷和排出动作自动去除 的从动辊。