Customizable 240gm Trip Force 3 Contact Domes Membranes With ROHS Compliant

In a membrane switch, the contact domes are a crucial component that enable the switching functionality. The contact domes are small, dome-shaped conductive elements that are positioned between the two conductive layers of the membrane switch.

Here's how the contact domes work in a membrane switch:

1. Key Press:

   • When the user presses a key on the membrane keypad, the key cap applies pressure to the contact dome.
   • This pressure causes the dome to collapse, bringing the two conductive layers into contact with each other.

2. Circuit Completion:

   • When the two conductive layers touch, it completes the electrical circuit, registering the key press.
   • The collapsed dome acts as a temporary electrical bridge between the two conductive layers.

3. Key Release:

   • When the user releases the key, the contact dome's inherent spring-like property causes it to return to its original dome shape.
   • This action breaks the connection between the two conductive layers, effectively opening the circuit and registering the key release.

The contact domes are typically made of a conductive metal, such as stainless steel or polyester, and are designed to provide a tactile feedback sensation to the user when the key is pressed.

The design and properties of the contact domes can have a significant impact on the overall performance and feel of the membrane switch. Key factors include:

• Dome height and shape: Affects the tactile feedback and actuation force required to register a key press.
• Dome material: Impacts the durability, flexibility, and conductivity of the contact domes.
• Dome spacing: Determines the key travel distance and overall responsiveness of the membrane switch.

By carefully engineering the contact domes, manufacturers can optimize the membrane switch's performance, providing users with a comfortable, reliable, and responsive typing or input experience.

Common membrane keypad structure choose :







Other photo show :

Mechanical Properties :

1, reliability, service life: > 1 million times

2, closed displacement: 0.1 ~ 0.4mm (no touch-type) 0.4 ~ 1.0mm

3, health standard for power: 280g Power

4,Silvermigration: In 55 ℃, humidity 90%, 56 hours later, the second-line between the 10MΩ/50VDC

5, Silver online no oxidation, no impurities

6, Silver width

≥ 0.3mm, the smallest interval of 0.3mm, line edges <1 / 3,

the line gap of <1 / 4 width

7, pin spacing standard 1.00mm

8, lead anti-curvature, 10mm steel rod line pressure roller 80 constantly.

FAQ:

Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.

Q2. What is your terms of payment?
A: T/T 50% as deposit, and 50% before delivery. We'll show you the photos of the products and packages before you pay the balance.

Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU.

Q4. How about your delivery time?
A: Generally, it will take 10 to 15 days after receiving your advance payment. The specific delivery time depends
on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and
the courier cost.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.