Elevator leveling flat contact switch metal contact piece

What is a switch contact sheet?

The metal contact sheet of a flat contact switch is a critical component in the switch assembly. It is commonly used in the contact system of electrical and electronic equipment.

Function and role

Conductive function: The switch's metal contact sheet serves as the circuit's conductor. In order to fully close or disconnect the circuit, current is transmitted through the contact sheet from one electrode to another when the switch is pressed.
Elastic recovery force: There is typically some elasticity in the metal contact sheet. It will realize the repeated opening and closing of the switch by deforming when pressed and returning to its normal state when released.
Reliable contact performance: By lowering contact resistance and offering steady contact pressure, the metal contact sheet can guarantee good electrical contact performance both throughout the pressing and releasing operation.

Material selection

Common materials: The metal contact sheet materials commonly used in flat contact switches include stainless steel, copper alloy, nickel alloy, and silver-plated metal. The choice of different materials depends on the use environment and performance requirements.
Stainless steel: It has good corrosion resistance and elasticity and is often used in switches in harsh environments.
Copper alloy: It has excellent conductivity and is often used in occasions requiring high conductivity.
Silver or gold-plated contact pieces: Contact pieces with precious metals on the surface are more conductive and can effectively prevent oxidation, extending the service life.

Structure and shape

Flat design: For usage in small switch systems, flat contact parts are often made of thin, flat material. This design is appropriate for electronic equipment that need to save space because it can thin the switch overall.
Bump design: To guarantee a smaller contact surface when in touch, some contact parts are made with tiny bumps on their surface. This lowers contact resistance and increases contact dependability.
Stamping: The process of stamping metal contact pieces yields very precise size and shape as well as a certain elastic recovery force.