| 摘要 |
PROBLEM TO BE SOLVED: To provide footwear for heel bottom which has a high energy conversion efficiency with reduced loss to solve the problem that some conventional footwear absorbing and cushioning the impact of landing heel during walking and converting the impact energy to a walking propulsion force, have a reduced energy conversion efficiency and increased loss.SOLUTION: A heel bottom for rolling contact of heel, uses a heel bottom 1 including a flexible lower heel bottom 2 having a high modulus of elasticity, a horizontally extending plate shape, and spring function, and an inflexible upper heel bottom 3 including a downward protruding curved surface having a lower surface gradually curved upward from a horizontal position, wherein the heel bottom is obtained by superposing the upper heel bottom on the lower heel bottom, and the heel bottom has a horizontally V-shaped spring structure having an integral structure obtained by shaping the heel bottoms into a laid V-shape (<) and connecting the front ends of the heel bottoms. When the lower side of the lower heel bottom 2 receives the load of the body weight of a wearer upon landing the heel, the lower heel bottom is once supported to be bent upward along the curved surface of the upper heel bottom 3, and absorbs and cushions the impact, and immediately after that, the bottom surface is supported to be rolled, returned from bending, and converts the absorbed and cushioned energy to the walking propulsion force. |
