Patent ID: 9527645
Filing Date: 2016-12-27
CPC Classification: A45C,B29C,B29K,B29L,B65D,H04M

Claim Text:
1. A waterproof box structure, comprising: a composite plate comprising a chemical hardened layer and a thermoplastic layer, the chemical hardened layer overlaying a major surface of the thermoplastic layer and being attached thereto, a major surface area of the thermoplastic layer being greater than a major surface area of the chemical hardened layer such that a flange is formed, the flange comprising an external periphery of the thermoplastic resin layer extending from and surrounding an external periphery of the chemical hardened layer; and an external frame formed in a mold with the composite plate by injection molding, wherein an internal periphery of the external frame covers the external periphery of the thermoplastic resin layer and is fused with the flange during the injection molding; wherein a groove is formed on a surface of the thermoplastic resin layer opposite to the chemical hardened layer, and a portion of the internal periphery of the external frame is filled into the groove.