Membrane Keypads
Membrane keypads offer a unique combination of features to enable fast and simple supply of customers specific keypads. High quality products, designed in Germany and manufactured in Asia to ensure competitive prices, are backed up by local design and sales support to ensure fast and accurate communications and rapid delivery of each customers requirements.
Switches are available in flat, poly-domed and metal domed types, giving a variety of levels of tactile feedback and life expectancy in excess of one million operations.
All Knitter-Switch membrane keypad designs are tested for resistance to surface scratching, thermal shock, electrical ratings and operating lifetime.
Membrane Keypads - Options - Click here.
| |
Graphic Overlay |
|
|
| |
Material |
|
Polycarbonate Film (PC) |
| |
|
|
Polyester Film |
| |
|
|
|
| |
Profile |
|
Flat (Non Tactile Switch) |
| |
|
|
Embossed (Tactile Switch) |
| |
|
|
|
| |
Surface Texture |
|
Gloss |
| |
|
|
Matt |
| |
|
|
Selective Texture |
| |
|
|
|
| |
Additional Features |
|
|
| |
Windows |
|
For LED ot LCD Displays |
| |
|
|
|
| |
LEDs |
|
Integral SMD LEDs |
| |
|
|
|
| |
Shielding |
|
For ESD / RFI |
| |
|
|
|
| |
Legends |
|
Intertable Legends for final customisation |
| |
|
|
|
Membrane Switch Structure - Options - Click here.
Flat Type (Non-Tactile)
Tactile Type
Membrane Keypad Structure - Click here.
Reference Materials- Click here.
Reference Materials |
| |
Overlay |
|
Polycarbonate Film (PC) - Matt or Glossy surface: Thickness (mm): 0.075, 0.125, 0.175, 0.250, 0.375, 0.500
Polyester Film (PET) with UV-cured texture coating - Matt or Glossy surface: Thickness (mm): 0.15, 0.20, 0.25 |
|
| |
|
|
|
|
| |
Circuit Layer |
|
Polyester Film (PET) - Thickness (mm): 0.075, 0.100, 0.125 |
|
| |
|
|
|
|
| |
Conductive |
|
Carbon Ink, Conductive Silver Paste or Metal Domes |
|
| |
|
|
|
|
| |
Spacer |
|
Polyester Film (PET) |
|
| |
|
|
|
|
| |
Adhesive |
|
Adhesive Double Tape |
|
| |
|
|
|
|
Standard Specification for Membrane Keypad - Click here.
Standard Specification for Membrane Keypad |
| |
Contact Resistance |
10 -500 Ohms |
|
| |
Operation Voltage |
<35 VDC |
|
| |
Operation Current |
>100mA |
|
| |
Open Circuit Resistance |
>10 Meg Ohms |
|
| |
Operation Force |
30g - 500g |
|
| |
Operation Temperature |
-20°C - +70°C |
|
| |
Life Expectancy |
5 x 105 - 10 x 105 cycles |
|
| |
Switch Stroke (travel) |
0.1mm - 0.6mm |
|
| |
Contact Bounce |
5 - 30 mSec |
|
Silicone Rubber Keypads
Silicone rubber keypads are manufactured from elastic, non-toxic silicone rubber compounds. Silicone keypads are processed from compression or injection molding. The result is an economic and reliable keypad for small, medium and large production runs. Silicone keypads can be integrated with printed circuit boards or flexible circuits and have excellent resistance to temperature and ageing.
Silicone Rubber Keypads - Click here.
Basic Construction Illustration - Click here.
Force Stroke Curve of Rubber Keypad - Click here.
| Force |
|
|
Location |
|
| FP |
Peak Force |
|
O |
Original Point |
| FU |
Max. Return Force |
|
P |
Peak Point |
| FC |
Contact Force |
|
C |
Contact Point |
| FR |
Min. Return Force |
|
R |
Return Point |
| FM |
Max. Return Force |
|
M |
Max. Return Point |
| FD |
Drop Force (FD = FP - FC) |
|
Travel |
|
| FG |
Gap Force (FG = FP - FM) |
|
O-P |
Peak Force (FMAX) |
| Stroke |
|
|
P-C |
Contact Force |
| S1 |
Peak Stroke |
|
C-S |
Min. Return Force |
| S2 |
Contact Stroke |
|
S-R-M-O |
Gap Force (FG = FP - FM) |
Typical Key Sections and Characteristics - Click here.
Special Design Illustrations - Click here.
Special Design for Construction Ideas - Click here.
Guideline for Assembly Design - Click here.
|
