Stretch Cover Waterproof Tact Switch

Product structure, materials, and functions of each component of  6*6 IP67 Tact Switch

1. Button (Red/Black/Blue) Material: PBT engineering plastic (waterproof and wear-resistant) Function: Press to activate terminal, external waterproof protection 2. Stretch Shell Cover Plate (Silver-Plated Copper) Material: Copper substrate + silver-plated layer Function: Secures internal structure, enhances conductivity and oxidation resistance 3. Upper Contact Spring Material: Phosphor bronze (elastic) Function: Contacts lower spring upon press to complete circuit 4. Insulating Spacer Material: PET insulating film Function: Isolates upper/lower springs to prevent accidental contact 5. Lower Contact Spring Material: Phosphor bronze (elastic) Function: Connects to the pin, serving as the fixed terminal for circuit conduction 6. Base Material: High-temperature resistant PA plastic Function: Supports internal components, positions the springs and pins 7. Surface Mount Lead Material: Tin-plated copper Function: Soldered to the PCB board to establish circuit connection

The Function of the Pull-Cover on DIP Waterproof Tactile Switches

The stretch cover of this 6×6 waterproof surface-mount stretch-cover tact switch serves as the “first line of defense for external waterproofing.” Combined with the structural design of the cover plate and base, it collectively achieves the switch's waterproof performance.

1.Physical Sealing Barrier 

The stretch cover tightly adheres to the underlying silver-plated copper cover plate/base, forming the first layer of isolation in the “external-internal structure.” This directly blocks liquids, dust, and other foreign substances from entering the switch's internal spring contacts and circuitry. 

2.Extended Waterproof Path The three-dimensional structure of the stretch cover (protruding cover body + edge-sealing design) extends the liquid penetration path, reducing the probability of moisture seeping through gaps and enhancing overall waterproof sealing performance. 

3.Protection of Spring Contact Area During press operation, the stretch cover is the component directly exposed to the external environment. Its material (typically waterproof PBT plastic) inherently possesses water-resistant properties, preventing direct moisture contact with the internal conductive spring contacts and reducing the risk of short circuits.