JPS6440008A - Clasp - Google Patents

Abstract

PURPOSE: To make a locking tool itself easily attachable and detachable by inserting a pin insert pipe having a pin insert hole to the cylindrical vessel-like metal fitting of a pin locking tool, bringing a plurality of balls loosely fitted into its head part into partial contact with the inclined inside surface of the metal fitting to elastically repel it in the top direction by a spring, and protruding needles on the non-attractive surfaces of the ferromagnetic plates of a female tool and a male tool. CONSTITUTION: Denoted at A is the female tool of a attractive tool, which has a disk-like ferromagnetic plate 2 laid along the magnetic pole surface (a) of a permanent magnet 1 having a hole 1a, a ferromagnetic projection 2a protruded within the hole 1a, and a needle 5 protruded on the non-attractive surface. A pin locking tool C is formed of a metal fitting 6 and a pin insert pipe 7, and a plurality of steel balls 8 are partially protruded and recessed to the swollen head part 7' on the end part of the pin insert pipe 7 according to the inside diameter of an inclined inside surface 6b. A coil spring 9 is inserted to the pin insert pipe 7 to elastically repel the swollen head part 7' in the end direction within the metal fitting 6. A male tool B also has a needle 5, and is engagingly locked to a mounting cloth D by the pin locking tool C, and the ferromagnetic plate 3 of the male tool B is set on the magnetic pole surface (b) side of the female tool A, so that the ferromagnetic projections 2a, 3a are mutually attracted.