Abstract: A buckle apparatus includes an insertion control subassembly press-operating an ejector when a pair of tongue parts are simultaneously inserted into a buckle body for allowing insertion up to an engaging position between the respective tongue parts and an engaging member while regulating the press operation by posture tilting of the ejector when only one tongue part is inserted. The insertion control subassembly includes a frame member having a guide rail part reciprocatively slidingly guiding the ejector along the direction of the press operation while including a stopper part separably coming into contact with the ejector in posture tilting from an insertion allowing posture for regulating movement in the direction of the press operation on the guide rail part.

Abstract: A buckle apparatus comprises insertion control means press-operating an ejector (13) when a pair of tongue parts (5c, 6c) are simultaneously inserted into a buckle body (2) for allowing insertion up to an engaging position between the respective tongue parts (5c, 6c) and an engaging member (10) while regulating the press operation by posture tilting of the ejector (13) when only one tongue part (5c, 6c) is inserted. The insertion control means comprises a frame member (15) having a guide rail part (15g) reciprocatively slidingly guiding the ejector (13) along the direction of the press operation while comprising a stopper part (15k) separably coming into contact with the ejector (13) in posture tilting from an insertion allowing posture for regulating movement in the direction of the press operation on the guide rail part (15g).