buckle

(Problem) The strength of the arm buckle is improved without impairing the function of the buckle itself and without complicating the structure. (Solution) A male buckle MB having a cylindrical female buckle FB and an insertion portion 20 inserted into the female buckle FB is provided. The insertion part 20 is provided with a central leg part 22 and elastic leg parts 23 formed on both sides of the central leg part 22, respectively, and the elastic leg part 23 has an engaging protrusion 23c. is formed In the arm buckle FB, the engaging protrusion 23c of the elastic leg portion 23 elastically deformed inward in accordance with the insertion operation of the insertion portion 20 is fitted and engaged by an elastic restoring force at a predetermined insertion position. The base is provided with an engaging hole (16). The arm buckle FB includes a pair of partition plate portions 13 and 13 for guiding the central leg portion 22 to be received in the center between the opposite inner walls 14a and 14a of the arm buckle FB. are being prepared