| 摘要 |
PROBLEM TO BE SOLVED: To provide a foldable screen designed such that the number of components is reduced, its structure is simplified, a screen cloth is prevented from being distorted or unstable despite an increase in the vertical size of the screen, and sufficient support strength is ensured. SOLUTION: A pantograph mechanism 3 for supporting the screen cloth includes: a lower rhombus link assembly 4; an inverted-V-shaped reinforcement part 5 having a pair of beam members 51 and 52; and an upper rhombus link assembly 6 synchronized with the extending movement of the lower rhombus link assembly 4. The upper ends of both the upper left and right links, 41a and 41b, of the lower rhombus link assembly 4 are disposed so as to intersect each other and are pivotally supported at the intersection 44. The left and the right links 41a and 41b are extended upward from the intersection 44. The extended parts of the left and the right links serve as the lower left and the lower right links, 61c and 61b, of the upper rhombus link assembly 6. COPYRIGHT: (C)2008,JPO&INPIT
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