Energy saving security composite window

An energy-saving security composite window comprising a peripheral side frame and glass installed on the side frame, wherein the side frame is of a composite structure comprising:

• a metal pipe located centrally to serve as a main body of the side frame and having an inner cavity filled with a filling material;
• a first and a second non-metal profiles respectively fixed on an outer surface of the metal pipe;
• an installation groove for installing glass formed between the metal pipe and the non-metal profiles;
• a first external profile fixed solely on an outer surface of the first non-metal profile or both on the outer surface of the first non-metal profile and the outer surface of the metal pipe;
• and
• a second external profile fixed solely on an outer surface of the second non-metal profile or both on the outer surface of the second non-metal profile and the outer surface of the metal pipe,
• wherein each of the first and second external profiles is a metal alloy profile, a wooden profile, a plastic profile or a glass fiber profile independently;
• the first non-metal profile comprises a groove at one end, and the first external profile comprises a corresponding hook claw at one end so that the hook claw fits into the groove and form an internal hidden snap end;
• the hook claw has only a leading in angle but not a leading out angle so that once the hook claw fits into the groove, the internal hidden snap end thus formed achieves a self-locking state;
• and
• the first external profile comprises a lug at another end, and the second external profile has a corresponding slot at one end so that the lug is snapped into the slot and therefore forms a buckle end.