Hand railings

摘要

A hand railing includes a metal rod, a plurality of positioning units and a plastic cover. The positioning units are adapted to be secured on the surface of the metal rod. The metal rod is then placed in the injection mold, and the positioning unit is disposed between the metal rod and injection mold. The melted plastic cover is then introduced into the mold to fill the mold including the recessed portions and melt the surface of the positioning unit, so the plastic cover can completely cover the metal rod and the positioning unit. Furthermore, since the melted plastic cover also flows into recessed slot, the engagement between the metal rod and plastic cover is even stronger.

主权项

1. A hand railing comprising:
a metal rod having a first end and a second end, and a recessed slot formed on a surface of said metal rod extending from said first end to the second end; a plurality of positioning units having a pair of cover bodies symmetrically formed on both sides of the positioning unit, and a resilient connecting portion used to connect the cover bodies; a concave arc surface formed on the side that the cover bodies face each other; the cover body having a reverse hook portion while the cover body having a fixed hole; the concave arc surfaces are used to attach to the surface of the metal rod, and the reverse hook portion plugs into the fixed hole to secure the positioning unit on the metal rod; and a plastic cover, wherein the metal rod is adapted to be disposed in a mold during an injection molding process and the positioning unit is adapted to be disposed between the mold and the metal rod, and a plurality of recessed portions are formed on the surface of the positioning unit so that the plastic cover, when it is melted, flows to cover an outer surface of the metal rod and flows into the recessed slot, and a ring section of the plastic cover is formed at the first end of the metal rod while a screw section is formed at the second end of the metal rod, and the ring section and the screw section are arranged to form the hand railing and a stopping portion is used as a protection thereof.