| 摘要 |
PROBLEM TO BE SOLVED: To engage and fit shoe soles with a curved surface of a frozen ground by removing snow stuck to the arches of the feet by the weight of a walking person while walking. SOLUTION: A circular female spiral spring having sufficient strength and elasticity, and appropriate size is strongly fitted like a rivet to the shoe sole between the arch of the feet and the heel so that the spring is slightly (3-5 mm) protruded. When a wearer walks by wearing the shoes, snow is removed by elasticity of the spring which is expanded and contracted by pressing to or separated from road surface. When the spring is pressed to the road surface by walking, the spring is bent and slightly expanded, and engaged with the snow so as to prevent the walker from falling down. COPYRIGHT: (C)2005,JPO&NCIPI
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