| 摘要 |
<p>A first lock member is connected to a first connecting plate of a foldable connecting plate. The first lock member has a pair of push plates laterally slidably mounted in a housing, a spring laterally disposed in the housing and arranged to be longitudinally bent by pushing the push plates. A lock plate is provided to be longitudinally moved by the spring when the push plates are pushed. A lock projection is provided on a second connecting plate of the foldable connecting plate and has an engaging notch to be engaged with the lock plate. The spring is arranged to release the lock plate from the notch when the push plates are pushed. <IMAGE></p> |
