| 摘要 |
PROBLEM TO BE SOLVED: To provide a spectacle case where structural strength is improved by using material of low durability such as paper, metallic material in the state of a thin plate. SOLUTION: At a bottom surface part of a rectangular parallelepiped box structure, a beam consisting of one creasing normally is formed of a beam consisting of two circular creasings. Thus, a load applied from the upper part of the spectacle case is dispersed to improve the structural strength of the spectacle case. Moreover, poles where respectively one pole is formed in a vertical direction from each vertex at the bottom surface part normally are formed of two or more poles from each vertex of the bottom surface part so as to disperse the load to one pole to multiple directions to reduce the load to one pole. COPYRIGHT: (C)2006,JPO&NCIPI
|
