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    • 2. 发明授权
    • Foldable easel
    • 可折叠画架
    • US4544123A
    • 1985-10-01
    • US611178
    • 1984-05-17
    • Peter R. Peacock
    • Peter R. Peacock
    • A47B19/08G03B21/30A47B97/08
    • A47B19/08G03B21/30
    • A foldable easel for supporting sheet material includes three sheet members pivoted end to end for selective movement between a folded condition with the members in stacked parallel relation and an erected condition with the members in triangular relation. The free end of one of the two outer members has a lip for supporting the sheet material to rest against the upstanding sheet member in the erected condition. In one embodiment, a mating pin-and-hole connecting system is provided at the free ends of the outer members and at the ends of the intermediate member for permitting releasable connection of the members in either their erected or folded conditions. In another embodiment, one of the outer members has a perimetric border within which the other members are contained in the folded condition and which acts as the lip for engagement therewith of the other outer sheet member when in the erected condition. The outer sheet member which is upstanding in the erected condition may be provided with pivoted side portions for expanding the available surface area for use as a photographic slide projection screen or for additional sheet material support. Holes are provided along the side of at least one of the sheet members for receipt of the easel in a ringed binder.
    • 用于支撑片材的可折叠画架包括:三个片材构件,其端部到端部枢转,用于在折叠状态与构件之间以堆叠平行关系进行选择性移动,并且具有三角形关系的构件。 两个外部构件中的一个的自由端具有用于在竖立状态下支撑片材以抵靠直立片材构件的唇缘。 在一个实施例中,在外部构件的自由端和中间构件的端部处设置配合销孔连接系统,以允许构件在其竖立或折叠状态下可释放地连接。 在另一个实施例中,一个外部构件具有周边边界,其中另一个构件处于折叠状态,并且当处于竖立状态时用作与另一个外部片构件接合的唇缘。 在直立状态下直立的外片构件可以设置有用于扩大可用表面积的枢转侧部分,以用作照相滑动投影屏幕或用于附加的片材支撑件。 沿着至少一个片状构件的侧面设置孔,用于在环形活页夹中容纳画架。