| 摘要 |
The invention provides aluminum ladder hinge with enhanced safety structure. The hinge is made of flat inner case and outer case. Especially, the hinge has a locking block design to stabilize the angle of opening and closure. There is also a design of a joint reinforcing disk and a reinforcing tab to enhance the guiding groove and reduce friction loss. There is also design of prolonged caps and a rectangular hole, liner to strengthen the assembly of the hinge and the aluminum ladder. Based on the above designs, an advanced aluminum ladder hinge with enhanced safety structure is invented to improve the safety of aluminum ladder in use.
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