| 摘要 |
An improved safety belt buckle for use with a buckle end pretensioner. The buckle for a vehicle safety restraint belt comprises a latch (5) moveable between a tongue engaging position in which the buckle is fastened and a tongue disengaged position in which the buckle is open, a button (7) moveable in the direction of tongue insertion to lift the latch against the action of a biasing spring (9), into the disengaging position. A securing means (10) in the form of a slidable plate is mounted in the buckle frame and is moveable between a position in which it restrains a movement of the latch into the disengaging position and a position in which it does not restrain movement of the latch. The securing plate is biased to the unrestraining position by a leaf spring (12), the strength of which is chosen so as to be overcome during the deceleration phase of a pretensioner so that the securing plate (10) moves to the restraining position and prevents opening of the buckle but so that when pretensioning forces dissipate, the securing plate moves back to the unrestraining position. In this buckle, the securing plate moves into the latch restraining position during the deceleration phase of the pretensioning operation and thus reduces the danger of the buckle jamming. |
