Type of one-piece microswitch with built-in resistor(s)

A type of one-piece microswitch with built-in resistor(s), comprising a switch casing, a button installed on the switch casing, with a pedestal installed in the switch casing, the common, first and second terminals located on the pedestal to electrically connect with external circuits, a first contact electrically connected to the common terminal, a second contact electrically connected to the first terminal and the second terminal respectively. It has following characteristics:

• the common terminal is connected to the first and/or second terminal via one or more resistors with a switching device used for switchover of connection or disconnection between the first and the second contacts;
• the button and pedestal are connected by a spring piece or spring;
• the switching device is installed on the button, which constitutes a linkage with the button.