Introduction to the Structure of Metal Key Switch
Release time：2019-08-13 Clicks： Click
What's the problem with the structure of metal key switch? What's the specific structure? Here's a detailed introduction for you.
Let's see how the metal key switch is constructed.
Metal key switch with lamp and lock has a metal sheet inside the key switch, with spring fulcrum in the middle, spring displacement and aging deformation of plastic support, the switch is not flexible, can be disconnected after power off to see, if not plastic parts damaged, may be able to recover. The zero wires inside the switch are straight-through and have nothing to do with the switching components. Therefore, if the switch jumps into the air, the insulation layer of the zero wires passing through the switch is damaged. The damaged part can be cut off and reconnected. Attention should be paid to the insulation. It may also be that the foot of the indicator lamp is short-circuited and can be reconnected.
The structure of metal key switch with lamp: indicator lamp, key riser, reset spring, bridge type moving contact, static contact, connection post.
Usually each metal key switch has two pairs of contacts. Each pair of contacts consists of a constant open contact NO and a constant closed contact NC. When the button is pressed, two pairs of contacts act at the same time, usually closed contacts are disconnected, often open contacts are closed.