| 摘要 |
In a button which includes a button body and a tack member adapted to be joined with the button body when attaching the button to a garment fabric, the button body has a contractible and stretchable hollow hub in the form of a double tube composed of an outer tube integral with a button back and projecting downwardly therefrom and an inner tube separate from the button back and telescopically connected to the outer tube. A spring is mounted between the inner and outer tubes so as to normally urge the inner tube toward the button head. |
