1、Industrial automation: In industrial automation, key switches are used to control the start, stop, and other functions of machines and equipment. For example, on a production line, button switches can be used to control the operation and emergency stop of machines to ensure the safety and effectiveness of the production process.

2、Traffic signal system: The control panel in a traffic signal system typically includes button switches used to control the changes in traffic lights and the operation of other traffic signal devices. Traffic management personnel can use these switches to adjust signals in response to changes in traffic flow.

3、Buildings and homes: In buildings and homes, button switches are used to control lighting, sockets, and other electrical equipment. For example, the lighting in a room can be turned on or off by pressing a switch on the wall.

4、Automobiles and Transportation: In automobiles and other modes of transportation, button switches are used to control various functions of the vehicle, such as starting the engine, adjusting windows, controlling lights, etc. These switches are usually concentrated on the dashboard or steering wheel of the vehicle.

5、Medical equipment: Many medical devices also use button switches to control the operation and functions of the equipment. For example, equipment in the operating room may be equipped with button switches to control the brightness and position of surgical lights.

6、Information technology: The keyboard and mouse in computers and other information technology devices are essentially a form of key switch. They are used for inputting data and executing commands, and are one of the main ways we interact with computers.

7、Game equipment: Game controllers typically include various button switches used to control the movement and execution of actions of game characters. These switches can be traditional buttons or joysticks, as well as touch screens or motion sensors.

8、Security system: In security systems, key switches are used to control access control, alarm systems, and monitoring equipment. For example, the control panel of a security system may be equipped with button switches for setting security modes and disarming alarms.

As a simple and effective electrical control device, key switches have important applications in various fields. They provide us with convenient and secure control methods, enabling various devices and systems to operate normally and maintain good functionality.