Button switch We all know, is a kind of electronic components to control the flow of current, in daily life, we often see, many types of switches, such as metal button switch, touch button switch, waterproof switch, explosion-proof switch Wait. These switches are used more widely, the market demand is great. We use the button switch has not had, its internal composition and structure, how to classify it? Let's look at the following.
First, the composition and structure of the button:
Mainly by the button cap, return spring, bridge moving contacts, static contact, strut connecting rod and shell and other components. Its name, structure, and symbol.
Second, the classification of the button:
According to the static state (without any external force when the state) when the contact sub-state, can be divided into:
1, composite button: about to open, normally closed button combination into one. Static, normally open, normally closed button above; dynamic, normally closed contact first disconnect, normally open contact closed; external force release, normally open contact first disconnect, normally closed contact closed.
2, normally open button (start button): static, the contact is open; dynamic, the contact closed; release of the external force, the button automatically reset.
3, normally closed button (stop button): static, the contact closed, dynamic, the contact is open; external force release, the button automatically reset.
The above is the composition and structure of the button switch analysis, in fact, the function of each switch are inseparable from the same thing, that is, electricity, and some can control high current, and some can be waterproof, and some explosion-proof.