Patent ID: 7343651

Claim:
A buckle, comprising a female member in approximately flat cylindrical form having a front plate portion and a rear plate portion with an opening created at one end, and a male member having an inserting portion for inserting into said female member through said opening formed at one end, wherein: a first engaging piece that elastically engages a first engaging portion that is formed on the inside of said front plate portion, and a second engaging piece that elastically engages a second engaging portion that is formed on the inside of said rear plate portion are formed on said inserting portion; a first operating portion that can be operated so that said first engaging piece is pressed from the outside and engagement with said first engaging portion is released is provided in said front plate portion, and a second operating portion that can be operated so that said second engaging piece is pressed from the outside and engagement with said second engaging portion is released is provided in said rear plate portion separately from said first operating portion, so that said male member and said female member do not become of a separated state unless engagement between said first engaging piece and said first engaging portion, as well as engagement between said second engaging piece and said second engaging portion, are released via both of said operating portion and said second operating portion, wherein said first operating portion is formed of a first operating piece that is provided in such a manner that the first operating piece can freely press said first engaging piece because of a slit created in said front plate portion, said second operating portion is formed of a second operating piece that is provided in such a manner that the second operating piece can freely press said second engaging piece because of a slit created in said rear plate portion, and said first engaging portion and said second engaging portion are formed of an inner peripheral surface of said slits, and said slits are created in approximately circular form and the ends of said first engaging piece and said second engaging piece have a curved form with a curvature that is approximately the same as the curvature of said slits.