Sofa handrail hinge

The utility model discloses a sofa handrail hinge, including the punching press iron sheet, disjunctor angle sign indicating number and billet, disjunctor angle sign indicating number one side is connected with billet and punching press iron sheet, disjunctor angle sign indicating number opposite side bottom and punching press iron sheet swing joint, billet one end and punching press iron sheet fixed connection, disjunctor angle sign indicating number is ears formula angle sign indicating number, be equipped with the accurate powder gear wheel of die -casting on the punching press iron sheet,the punching press iron sheet is equipped with the accurate powder pinion of a plurality of die -casting in die -casting accurate powder gear wheel one side, and accurate powder pinion of die -castingand the accurate powder gear wheel intermeshing of die -casting, the punching press iron sheet is equipped with swing joint's manganese piece catapult in die -casting accurate powder pinion one side,the accurate powder gear w