The working principle of key switch is introduced in detail.
Release time：2019-08-15 Clicks： Click
What's the working principle of the key switch? What's the details? I'll give you a detailed introduction below.
The key switch is a kind of switch that uses the drive mechanism of the key driver to connect or disconnect the moving contact and the static contact, and then realizes the circuit switching through this switch. So fully understand the principle of button switch, can better grasp the working mode of button switch, so as to make household or industrial power more secure.
We all know that button switch is a kind of switch controller with simple structure, but it is widely used. The key switch can complete a series of basic switch control, such as start, stop, forward and reverse, speed change and so on. Why can the key switch accomplish these controls in a relatively simple structure? This requires a series of analysis from the principle of the key switch.
There are many kinds of button switches, which have different structures. They can be divided into ordinary button-pressing, mushroom head, self-locking, self-resetting, rotary handle, indicator lamp, symbolic and key type, etc. Although the structures are different, their working principles are basically the same. Key switch has single button, double button, three buttons and different combinations. Most of the commonly used structures in families are building blocks. If we want to understand its working principle, we must first know the structure of the key switch and analyze its working principle from the structure.
Since most of the commonly used structures are building blocks, we will understand the principle of some building block button switches by the above figure. First, it has a key cap, so it can be called a key switch. It is the part that controls the whole key switch. Generally speaking, the key switch has two fixed contacts. These fixed contacts are divided into constant closed contacts and constant open contacts. We need to know that the constant closed contacts are disconnected first, and the constant open contacts are closed later. These two constant closed open contacts are the conversion contacts of the whole key switch and are the core parts of the key switch. Then we can see from the figure that there is also a movable contact and wiring in the key switch, which are indispensable parts of the key switch.
Simply put, the working principle of this key switch is to press or pull it out by hand on the key cap, so that it can operate along the bearing in the switch, press or pull out the switch contacts in the switch, and then the key switch can work normally.
The above contents are some simple introduction about the principle of key switch. I hope that through some preliminary understanding of these contents, we can provide you with some small help, so that household or industrial electricity is safer.