| 摘要 |
A binding component (1A) includes ring back portions (20), first ring arm portions (20R), second ring arm portions (20L) and a back part (3A) to which the ring back portions (20) are connected. Each ring back portion (20), each first ring arm portion (20R) and each second ring arm portion (20L) forms an annular ring part (2A). Each ring part (2A) includes fitting portions (22R, 22L) at places where the ring back portion (20) and the first and second ring arm portions (20R, 20L) are connected. The fitting portions (22R, 22L) are configured to be fitted by an operation of opening and closing the first and second ring arm portions (20R, 20L) with hinge portions (21R, 21L) of the ring back portion (20). Each fitting portion (22R, 22L) includes at least one first fitting convex portion (23), at least one first fitting concave portion (24) to engage with the first fitting convex portion (23), at least one second fitting convex portion (25) and a second fitting concave portion (26) to engage with the second fitting convex portion (25). |
