| 摘要 |
It is object of the present invention to provide a buckle for a seat belt having an excellent double lock function that can surely lock the latching by a latching member even against impact in any directions without impairing normal operability. The buckle for a seat belt for keeping passengers of an automobile securely seated, which includes: a buckle base (2); an ejector (24) for biasing a tongue plate (36) inserted into the buckle base (2) in the tongue plate extracting direction; a latching member (11), journaled to the buckle base (2) , for blocking the tongue plate (36) from moving in the tongue plate extracting direction by latching the tongue plate (36) inserted into the buckle base (2) while opposing a biasing force of the ejector (24); a locking member (40) for regulating rotation of the latching member (11) in an unlatching direction; a push button (21) for unlatching the torque plate (36) from the latching member (11); and an arm member (50), rotatably supported by the push button (21), for blocking the push button (21) from moving in the push button pushing direction when the push button (21) is subjected to impact. |
