Patent ID: 8901444

Claim:
A current switching device comprising: a cover being provided with a curved slot; a base being combined with the cover to form an accommodating space, wherein a pivot is disposed on one side of the base and corresponding to the center of the curved slot of the cover; a plurality of metal terminals with plate-like structure being arranged in an asymmetrical shape and buried in the base, and each of the plurality of metal terminals has at least one surface exposed to the accommodating space, wherein at least one of the metal terminals has a sunken area formed on the surface of the metal terminals, and the sunken area is covered by part of the base for increasing the stability of the connection between the metal terminal and the base; a switching element disposed in the accommodating space comprises: a switching element body; an axial hole disposed on the switching element body and pivotally connected to the pivot of the base, so that the switching element body is able to rotate and swing through the pivot; a lever disposed on the other side of the switching element body opposite to the axial hole and passing through the curved slot to expose to the outside of the current switching device, wherein the lever is able to be pushed for operating the rotary swing of the switching element body; and at least two accommodating slots disposed on the surface of the switching element body adjacent to the plurality of metal terminals; and at least two contact pieces disposed in the two accommodating slots respectively, and each contact piece comprising at least two contact points, wherein all the contact points contact different metal terminals, and each contact piece being able to conduct electricity between two metal terminals, the contact positions between the two contact pieces and the plurality of metal terminals being able to be changed by the rotary swing of the switching element, so as to switch the current direction; when the switching element rotates in the accommodating space and swings to touch the edge of the base, an extra space between the base and the switching element would remain in the accommodating space for designing dust-proof structure or minimizing the volume of the base so as to reduce material cost.