Patent ID: 9450349
Filing Date: 2016-09-20
CPC Classification: H01C,H01H,H01R

Claim Text:
1. A power socket with over-current protection, comprising: a base member, defining a receiving space recessed on a side thereof; an upper cover, covering the side of the base member to block the receiving space, and formed with at least one first insertion hole and a second insertion hole cut therethrough and in communication with the receiving space, and configured to be respectively inserted by a first plug pin and a second plug pin of a plug; a first conductive part, fastened in the receiving space and electrically connected with a live wire, and formed with at least one first pin corresponding in position to the at least one first insertion hole, wherein the first plug pin is abutted with the first pin and conducted with the live wire while being inserted through the at least one insertion hole and into the receiving space; a second conductive part, fastened in the receiving space and electrically connected with a neutral wire, and formed with a fixed contact protruded thereon; a joint conductive part, fastened in the receiving space, disposed between the first conductive part and the second conductive part and formed with at least one second pin corresponding in position to the second insertion hole, wherein the second plug pin is abutted with the second pin while being inserted through the second insertion hole and into the receiving space; a shape-memory alloy plate, formed with a through-opening cut therethrough and an extension plate which has an end connected with an end of the shape-memory alloy plate in a location corresponding to an inner edge of the through-opening, and other end extended towards other end of the shape-memory alloy plate corresponding to the inner edge of the through-opening to form a free end, wherein the extension plate is formed with a movable contact disposed thereon near the free end, a part of the other end of the shape-memory alloy plate is fastened with the joint conductive part, and the movable contact is movable through the through-opening to touch the fixed contact to form electric connection between the joint conductive part and the second conductive part, so as to enable the second plug pin to conduct with the neutral wire; a metal spring clip, having an end connected with the free end by lap joint and other end connected with other end of the shape-memory alloy plate by lap joint in a location corresponding to the inner edge of the through-opening, wherein in a condition that the movable contact and the fixed contact is electrically connected with each other, while the shape-memory alloy plate withstands over-current to have a temperature exceeding a predetermined temperature, the end of the shape-memory alloy plate is deformed towards the second conductive part to make the other end of the extension plate deform away from the second conductive part, and the movable contact and the fixed contact are opened and maintained in a status of no contact after an elastic stress of the metal spring clip is overcome; and a button, movably mounted in the upper cover and having an end inserted into the receiving space and corresponding in position to the metal spring clip and other end exposed out of the upper cover, wherein when the metal spring clip is pushed by the end of the button and the elastic stress of the metal spring clip is overcome, the other end of the extension plate is deformed towards the second conductive part to make the movable contact and the fixed contact in contact with each other and in a closed-circuit status.