UnionwellChina professional waterproof micro switch manufacturer

Waterproof micro switch structure

There are not many internal parts of the waterproof micro switch. After disassembly, as shown in the right picture, it can be divided into a handle, a sealed button, a waterproof shell, a metal contact piece, and a terminal block from top to bottom.

• Handle (Lever)
  As a trigger element, it has a push-to-trigger switch, and there are various lever types.
  
• Sealed Button
  An additional sealing ring button blocks water vapor and triggers the circuit when pressed.
• Waterproof Shell
  Sturdy and sealed, dustproof and waterproof to protect internal components.
  Metal Contact Sheet
  There is a highly conductive metal sheet inside, which adopts a spring mechanism design. When triggered by external force, it reacts quickly and completes the on-off switching.
  Terminal Block
  Located at the rear of the shell, it is responsible for signal output. Common forms include PCB board, welding or screw crimping.

Application of waterproof micro switch in automobile ignition device

Waterproof micro switches are mostly used in automotive micro switches, new energy equipment (charging guns) and some household appliances.

The video on the right shows you the application of Unionwell G3 ultra-small sealed micro switch in automobile ignition. The waterproof micro switch is installed under the automobile ignition. When the driver turns the key or presses the start button, the micro switch responds quickly and sends a start signal to the electronic control unit (ECU) to ensure smooth engine ignition. Since cars often operate in complex environments such as rain, snow, high humidity or dust, IP67 micro switches must be selected.

The Evolution of Waterproof Micro Switches in the Automotive Industry

With the rise of smart cars, electric cars and high-end assisted driving systems, the application scenarios of micro switches in automobiles are constantly expanding, which puts forward higher requirements for switch performance. Traditional micro switches are difficult to meet the stringent requirements of waterproof, dustproof, high and low temperature resistance in key parts such as engine compartment, chassis, door locks and charging ports. To meet this challenge, automotive micro switches mostly use IP67 waterproof micro switches.