Patent ID: 7325280

Claim:
A tongue which is slidably supported on a webbing and can be latched with a buckle, the tongue comprising: a tongue body; a locking mechanism rotatably attached to the tongue body, wherein during a vehicle collision state where a large deceleration acts on the vehicle, the locking mechanism activates to cooperate together with the tongue body to clamp the webbing therebetween, the locking mechanism includes: a webbing guide rotatably supported to the tongue body to guide the webbing; and a locking member connected to the webbing guide to allow relative rotation and, in operation, cooperates together with the tongue body to clamp the webbing therebetween; and a biasing mechanism configured to bias the locking member during a non-collision state in a direction away from the tongue body to set an initial position where a predetermined space is formed between the locking member and the tongue body through which the webbing passes, and the biasing mechanism is configured to bias the locking member in a direction of clamping the webbing when the locking member is actuated by a pulling force exceeding a predetermined value applied to the webbing during a vehicle collision state such that the tongue body clamps the webbing.