| 摘要 |
<p>A seat belt buckle (1) is provided which can prevent ejection of a tongue plate (4) caused by so-called reverse G, without increasing the force required to release the buckle from a locked state. The seat belt buckle (1) comprises a latch (17) pivotably mounted to a base (2) such that when the tongue plate (4) is fully inserted into the buckle, a latch swinging end (17i) engages in corresponding holes (4b, 9) in the tongue and the base. The buckle further comprises a lock member (13) pivotably mounted to the base and having a lock swinging end portion (13f, 13g). The lock member is biased by a spring 20 such that, when the tongue is fully inserted, the lock swinging end portion (13f, 13g) contacts the latch member urging the latch swinging end portion into engagement with the corresponding holes (4b, 9) and also in the direction in which the tongue is inserted into the buckle. The lock member further comprises a lock operation portion (13d) which can be contacted by a release button (16) to pivot the lock member to a release position. A weight portion (13e, Fig. 8) on the lock member is arranged such that the centre of gravity of the lock member is located nearer the lock swinging end portion than the lock operation portion. <IMAGE></p> |
