Abstract: The present invention relates to a shutter structure of aperture, which includes a base, a shutter, a spring, upper shell.

Abstract: The present invention relates to a thin-type plug, which is designed to have a pair of flexible wings for increasing the grasping area as plugging or pulling with hand. The two wings are molded on the main body of the plug, or combined on. For meeting the goal of saving effort, the mounted wings have extension ends just like levers when drawing off.

Abstract: A prong for a low profile plug consists of an exposed segment forming a plugging portion and a covered segment which is divided into two separated lugs. The two lugs are bent horizontally in opposite directions. One of the lugs has two fins that are bent up to form a U-shaped groove for receiving a wire therein. In one embodiment, the lug without the two fins is divided into two sub-lugs, each extending in opposite directions. The covered segment is thinner than the exposed segment.

Abstract: A prong structure of a plug is made from a rectangular unfolded strip which decreases waste material to a minimum during manufacture. The prong is formed by doubling over the rectangular strip with a lateral base portion formed at the bottom of both sides thereof. One wing of the lateral base portion of the prong is a lateral tie segment with a clip formed at the end, in which the clip is folded to form a U-shaped groove along the short side of the rectangular strip, for fixing a cord therein by closing the groove from both sides. The other wing of the lateral base portion of the prong is a lateral supporting lug, in which a tongue shaped assistant lug is punched out at the root, so that is can be bent to the clip side to fill the space left by a folded portion of the clipping lug to form a stable supporting base.

Abstract: A thin safety power plug is provided which includes an upper bayonet cap, a lower bayonet cap, an upper retainer, a lower retainer, a pulling lever and a pair of pins. The power plug is designed to overcome the defects of existing power plugs, the improvement facilitating the removal of the plug from a wall socket easily and safely. The power plug makes use of the lever action between the pulling lever and the wall socket.