| 摘要 |
An easel back for supporting a photo frame in which the structure includes a backing member of hollow, open construction having a triangular supporting member hinged to an inner lateral edge and a triangular bracing member hinged to the supporting member with the members being folded at the hinges and locked to form a rigid supporting leg of tetrahedron shape. The same supporting tetrahedron serves as a leg to stand the frame for either horizontal or vertical viewing. The parts are preferably molded as a single, integral unit employing plastic having a high degree of flexibility and with scorelines molded of reduced thickness for facilitating relative bending.
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