What are the 2 functions and 2 classifications of the metal dome of the membrane switch?

The 2 functions and 2 classifications of the metal dome of the membrane switch

1.Membrane switch metal dome

In the membrane switch, as the upper circuit layer, by pressing, the circuit is connected with the lower circuit to realize the switch function. It adopts ultra-thin stainless steel material (0.05mm-0.1mm thickness), and is punched and formed through 5~7 processes such as mold (ultra deep cold processing) optical grinding processing. It is flexible and can achieve a life span of more than a million times. It is mainly used for membrane keypads. It has four advantages: strong conductivity, stable rebound, good tactility, and long life.

The role of the metal dome:

1. With the help of metal conductivity, the two-pole contacts of the membrane keypads are connected.

2. With the help of the resilience of the shrapnel, tactile feedback is provided to the operator.

Classification of metal domes:

1. According to the shape, there are circle, triangle, square and rectangle.

2. According to the pressing weight, there are 180G, 280G, 350G, 450G, etc.

The membrane switch keypad used by JCF Technology are stainless steel square shrapnel. They are also nickel-plated and gold-plated. JCF Technology can also provide metal domes with diameters of 8.4mm, 10mm, 12mm, 14mm, and 16mm. Try to choose a large metal dome instead of a small one. When possible, try to use larger shrapnel, of course, at the same time choose the appropriate size in combination with the actual product use. Generally, the size of 10-12mm shrapnel is recommended, which is more suitable for actual finger pressing. The smallest metal dome is 6mm, due to the small button will have some impact on the touch.