When the metal button is pressed, the two pairs of contacts act simultaneously, the normally closed contacts are disconnected, and the normally opened contacts are closed. In order to indicate the function of each button, and avoid misoperation, the button cap is usually made into different colors to indicate the difference. The colors are red, green, black, yellow, blue, white and so on. The button switch allows for basic controls such as start, stop, turn, shift, and interlock. The main parameters, button switch type, installation hole size, contact number and contact current capacity, are illustrated in the product in the specification. For example, the red indicates the stop button, and the green indicates the start button. Usually, each button switch has two pairs of contacts. Each pair of contacts consists of a normally open contact and a normally closed contact. Yueqing Ping Xing Electronic and professional production and sales of button switches, waterproof buttons, switches, metal buttons, switches and other products, welcome to inquire.

Metal button switch
Common button categories and features:
Open type: suitable for inlay and fixed on switch board,
Panel on the control cabinet or console. The code name is K.
Protection: with a protective housing, to prevent the internal button parts from mechanical damage or touch the live parts, the code named H.
Waterproof: with a sealed outer casing, to prevent rainwater intrusion. The code name is S.
Anticorrosion: it can prevent the invasion of chemical corrosive gases. The code name is F.
Explosion proof: it can be used in explosive gas and dust places without explosion, such as coal mines. The code name is B.
Knob type: use hand to rotate operation contact, there are two places to break through, usually panel mounted type. The code name is X.
Key type: use key to insert, rotate, operate, can prevent misoperation or for special operation. The code name is Y.
Emergency: with red mushroom button head out