| 摘要 |
A tongue and buckle fastener for a safety belt harness has a tongue (1) with a radiused head portion (3) shaped to mate with a recess (18) in an ejector (17). A latch plate (20) moves at right angles to the direction of insertion of the tongue 1 to engage behind the head portion (3) of the tongue (1). When the tongue (1) has been ejected, the latch plate (20) engages in a groove (28) in one side face of the ejector (17) and overhangs the recess (18) in the ejector (17). When the tongue (1) is inserted, it engages corners (29a) and (29b) on the latch plate (20) which overhang the recess (18) so as to lift the latch plate (20) out of the groove (28). If a member of any other shape than the tongue 1 is inserted, it cannot engage with both corners (29a) and (29b) simultaneously. Consequently only one side of the latch plate (20) is lifted and the ejector continues to block further insertion of such a member. |
