Key switch manufacturers: What are the types, structures and shapes of key switches?

　　Key switch manufacturers: What are the types, structures and shapes of key switches?

The key switch may be the simplest component in the electrical circuit, but it does control the lifeblood of the entire control circuit, so it is also called the "master switch". So, key switch manufacturers: what are the types, structures and shapes of key switches?

Key switch manufacturers: What are the types, structures and shapes of key switches?

1. Generally, the key switch is composed of a button cap, a return spring, a bridge moving contact, a static contact, a pillar connecting rod and a shell. When the button is not subjected to external force (I. e., static), it can be divided into stop button (I. e., dynamic off button), start button (I. e., dynamic off button) and reset button (I. e., the combination of dynamic off and dynamic off contact button). When the button is subjected to external force, the on-off state of the contact changes: the normally open contact is closed in static state, and the normally closed contact is disconnected in static state.

2. The button is represented by the symbol "SB" and is divided into three types: normally closed button switch, normally open button switch and composite button switch. When the button is not pressed, the normally closed static contacts A and B are connected through the internal metal moving contact under the force of the return spring. When the button is pressed, the moving contact is separated from the normally closed static contact, and A and B are disconnected. When the button is released, the contact automatically resets (closed state).

　　Key switch manufacturers: What is the principle of the key switch?

1. The key switch is a low-voltage switch electrical appliance used to cut off and connect the control circuit. The rated current of the button contact is 5A. Therefore, the circuit controlled by operating the button switch belongs to a small current circuit.

2. There is a single-pole on-off switch or a double-pole on-off switch. Press the kinetic energy and use can be divided into start button, reset button, check button, control button, limit button, etc. There are two kinds of buttons: on-off (normally open) and off-off (normally closed). The micro button is made of conductive rubber or metal sheet as a conductor, and can be used as a state selection switch for products such as small transistor radios, remote controls, and currency detectors.

Button is a term used in the old standard, and the new standard (GB2900 18) is referred to as button.

　Key switch manufacturers: What are the types of button switches?

1. Open button switch: embedded and fixed on the panel of switch board, control cabinet or console, code-named k.

2. Protection button switch: with a protective shell, it can prevent the internal button parts from being mechanically damaged, and it can also prevent people from contacting the live parts. The code name is H.

3. Waterproof button switch: with a sealed shell to prevent rainwater intrusion, code s.

4, anti-corrosion button switch: can prevent the intrusion of chemical corrosive gas, code-named f.

5, explosion-proof button switch: can be used in places containing explosive gas and dust, will not cause the explosion spread, such as coal mines and other places, code B.

6. Knob button switch: Turn the operating contact by hand, with two positions of on and off. Generally, it is panel mounted, code name is x.

7. Key button switch: insert the key to rotate the operation, which can prevent misoperation or operation by special personnel. Code is Y.

8. Emergency button switch: the big red mushroom button head protrudes outward, which is used to cut off the power supply in emergency, code-named J or M.

9. Combination button switch: a combination of multiple buttons, code e.

10. Interlocking button switch: multiple contacts interlock with each other, code C.