Tack for button

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 (1) for button, a cylindrical post (4) stands on the center of a seat plate (3) and a quadrangular pyramid shaped head (5) is formed at an end of the post (4). The head (5) is pointed such that a vertical angle of each of peripheral faces of the head (5) is in a range of 20 to 40 DEG . Four corners (7) on a proximal periphery (6) of the head (5) are protruded out of an outer peripheral face of the post (4) so as to form an engaging portion (8) which bites into a wall face of an attaching hole (17) in a boss portion (2) of the button. When the tack (1) is pierced into cloth, because the head (5) 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 (1) to the boss portion (2) firmly.