Key switch, also known as touch switch. The earliest appeared in Japan [called: sensitive switch] when used to meet the conditions of the operating force to apply pressure to the switch operation direction, the switch function is closed, and the switch is opened when the pressure is cancelled. Force changes to achieve continuity.

The tact switch is composed of an insert, a base, an elastic sheet, a button, and a cover plate. The waterproof tact switch adds a layer of polyimide film on the elastic sheet.

The tact switch has the advantages of small contact resistance load, accurate operating force error, and diversified specifications. It is widely used in electronic equipment and white goods, such as audio-visual products, digital products, remote controls, communication products, household Electrical appliances, security products, toys, computer products, fitness equipment, medical equipment, money detector pens, laser pen buttons, etc. Because the environmental conditions of the tact switch (less than 2 times the applied pressure / environmental temperature and humidity conditions and electrical performance) large equipment and high-load buttons are directly replaced by conductive rubber or pot switch hardware shrapnel, such as medical equipment TV remote control, etc.