Filter switch device

A filter switch device, comprising:

• a casing comprising a first chamber and a second chamber inside, where the first chamber and the second chamber are connected, the first chamber has a greater depth than that of the second chamber, a bottom side of the first chamber is configured with an axle, a plurality of first blocks, second blocks, and a pad, the first chamber has a left notch and a right notch respectively along two opposing inner walls of the first chamber, and the second chamber has a first opening on a bottom side and two troughs respectively along two opposing inner walls of the second chamber;
• an electromagnetic assembly housed in the first chamber comprises a magnetic element, a swing arm, an iron core, a winding seat accommodating the iron core, and a plurality of windings on the winding seat, where the axle threads through the magnetic element, a back end of the swing arm is mounted to a top end of the axle and coupled to the magnetic element, a front end of the swing arm has an engaging element, the iron core has a U-like shape with two parallel and opposing arms, the windings seat comprises two tubes, and the two arms of the iron core respectively thread through the tubes, the magnetic element is held between the two arms of the iron core, which are in turn are fixed by the first blocks, a body of the iron core is disposed on the pad and fixed by the second blocks, the magnetic element's two sides are respective a positive side and a negative side, the windings are respectively connected to a first welding pin and a second welding pin, the first welding pin and the second welding pin are connected to a plug, the plug is electrically connected to an external power source, an electromagnetic field produced by the windings after electricity is introduced is expelled by the positive side and the negative side of the magnetic element so that the magnetic element is turned as well as the swing arm;
• and
• a plate has its two opposing edges respectively received by the troughs of the second chamber, where a filter is disposed on the plate, a piece is extended from a lateral edge of the plate, the piece is located above the right notch, the piece has a limiting hole, the swing arm's engaging element runs through the limiting hole, and, when the swing arm turns, the engaging element drives the plate to move so that the filter is aligned with the first opening.