Switch combination structure

The utility model relates to a power switch, particularly a trigger switch structure for fast switch between the alternating current and the direct current, which is mainly composed of a pressing part, an upper cover, a linking rod, an interlock spring, a movable plate and a base. The movable plate is arranged between the upper cover and the base, utilizes the action of the pressing part to connect the contact transverse rod arranged on the linking rod with the contact terminal arranged on the base, so as to generate the on-off action of the switch. Simultaneously, the interlock spring is arranged between the linking rod and the movable plate, and the interlock spring can provide rebound force to make the movable plate fast return to the original position. The switch can fast finish the on-off action of the switch, and the spark can be prevented from generating.