| 摘要 |
A lockable hinge fitting which usually forms part of folding ladders, reclining chairs, etc., in which a pair of hinge arms are connected one to the other turnable round a common axis. One hinge arm carries a spring-loaded locking member which in its operative position locks the hinge fitting in a desired angular position by engaging one of a number of recesses circumferentially spaced apart from each other on the periphery of the other hinge arm. An unlocking lever is provided to move the locking member into its inactive position where the locking member is locked by a pawl. The pawl can be moved into its operative position in which it locks the locking member in its inactive position by pawl-actuating means during the movement of the unlocking lever in its unlocking position. This pawl actuating means is preferably an integral part of the unlocking lever or the pawl. According to the different attachments of the hinge fitting, the pawl will either release the locking member in any subsequent angular position defined by a recess or only when a suitable pivotable movement of the hinge fitting is performed. In both cases, the interlocking is performed automatically. |
