| 摘要 |
As illustrated in (A), a tab (500) has a tab tongue portion (550) disposed on the inside of a U-shaped pierced portion (560). The right end portion of the tab tongue portion (550) in the figure (the base part of the tab tongue portion (550)) is connected to the tab main portion (520). Furthermore, the tab tongue portion (550) is formed so as to extend to the left in the figure when the point where the portion connects to the tab main portion (520) is defined as the start point. Furthermore, as illustrated in (D), a groove (580) is formed on the back face (500B) side of the tab (500) at the base part of the tab tongue portion (550). |
