| 摘要 |
A safety lock pivoted to a back frame and a stand frame of a folding chair by a pivot and adapted for hooking on a headed locating pin at one side of a seat frame of said folding chair to secure said folding chair in an extended position, the safety lock including a metal hook turned about the pivot and having a retaining notch adapted for hooking on the headed locating pin, and a rubber cap covered on the hook and turned with it about the pivot, having a retaining notch adapted for hooking on the headed locating pin and an inside recess adapted for receiving the head of the headed locating pin.
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