| 摘要 |
PROBLEM TO BE SOLVED: To obtain a buckle which is inexpensive, and can secure smooth unlocking for a long time. SOLUTION: A button slope 66 is a curved surface opened toward a button 50 side in a direction of unlocking. A small increase in the pressing force of the button slope 66 pressing a butted side 86A in relation to the amount of movement of the button 50 immediately after the start of pressing allows frictional resistance to be smaller than previously, whereby wear of the butted side 86A can be reduced or prevented. Even when, for example, the butted side 86A is treated with a coating, frictional resistance between the button slope 66 and the butted side 86A is reduced to facilitate unlocking, dependence of a reduction in the frictional resistance on a coating decreases, and the coating can be made to last longer. Therefore, smooth unlocking can be made for a long time. |
