Rubber keypads, thanks to their properties, offer many possibilities for designing electronic devices. So in order to make the right choice with your keypad, it is worth to know the properties and consult the different solutions with technical support before making the order.
How silicone keypads are made?
The rubber keypad is manufactured in the process of high-temperature vulcanization of silicone.
Types of rubber keypads construction
In the construction of silicone keypads we can make a division (get the contact) due to the conductive element.
We distinguish three types of construction:
- A printed conductive paste containing contact areas on the conductive circuit. It is possible to make any shape of the plane that contains the contact.
- A vulcanized conductive element containing contact areas on the conducting circumference. Only standard shapes available.
- A metal plate or switch mounted on a conductive circuit, where the rubber keypad is
Thanks to its properties and processing capabilities, silicone is an excellent material for general use applications.
Furthermore a wide range of silicone and print colors, according to the RAL palette, gives us great opportunities to create a perfectly personalized product.
In the rubber keypad, by surface spraying with PU varnish, an increase in abrasion resistance is obtained. In addition, you can increase the visual qualities of the keypad by pouring epoxy resin drops on the surface.
Backlighting of rubber keypads
It is possible to use a silicone with the properties of transmitting light with a light source placed on the conductive circuit, then we obtain the effect of the entire surface of the silicone lighting. The effect that pictograms only shine we can obtain by surface sputtering of the keypad surface with covering paints and then laser engraving of pictograms.
Advantages of the rubber keypads:
- comfort of use
- greater possibility of differentiation of pressure force and keys travel in comparison with membrane keypads
- easy to keep clean
- resistance to mechanical damage
- larger packing of keys on the surface compared to a membrane keypad
- relatively low production costs.
Example constructions of rubber keypads
keypad with silicone cover
Basic properties of the rubber keypads
|based on the RAL palette,
the ability to combine the colors of silicones in the area of the keypad
|The shape and size of the keypad
|The shape of the contact of conductive carbon resin, preferred size
|Key travel (jump), preferred values
|0,8 mm, 1 mm, 1,2 mm, 1,5 mm
|any, based on the RAL palette
the number of printing colors can be any
|Pressure, preferred values
|Key surface finishing
|Vulcanization of keypad components
|silicones of different hardness and colors
|min. 1 million
|Surface laser engraving
|Backlighting of the keypad descriptions
|spraying by coating inks on the entire face of the keypad, for use in engraving pictograms
LC Elektronik offers many solutions. Choose from different technologies and find the best one for yourself
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