| 摘要 |
The present invention provides a tack which prevents puckering phenomenon from being generated when the tack is pierced into cloth and enables a firm engagement between the tack and a boss portion of a button. In the tack for button, a cylindrical post stands on the center of a seat plate and a quadrangular pyramid shaped head is formed at an end of the post. The head is pointed such that a vertical angle of each of peripheral faces of the head is in a range of 20 to 40°. Four corners on a proximal periphery of the head are protruded out of an outer peripheral face of the post so as to form an engaging portion which bites into a wall face of an attaching hole in a boss portion of the button. When the tack is pierced into cloth, because the head makes a linear contact with the cloth and it is pointed, no puckering phenomenon occurs, thereby making it possible to engage and fix the tack to the boss portion firmly.
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