Design Guide – Keypads



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Force Range 30 - 350 grams
Stroke Range 0.5 - 3.0 mm
Cycle Life (X103) 500 - 2,000

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Force Range 30 - 350 grams
Stroke Range 0.7 - 2.5 mm
Cycle Life (X103) 500 - 2,000

 


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Force Range 30 - 350 grams
Stroke Range 0.5 - 3.0 mm
Cycle Life (X103) 1,000 - 3,000

 


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Force Range 30 - 150 grams
Stroke Range 0.5 - 3.0 mm
Cycle Life (X103) 1,000 - 3,000

 


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Force Range 30 - 80 grams
Stroke Range 2.0 - 4.0 mm
Cycle Life (X103) 5,000 - 20,000

 


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Force Range 30 - 200 grams
Stroke Range 1.0 - 2.5 mm
Cycle Life (X103) 500 - 3,000

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Force Range 20 - 80 grams
Stroke Range 0.2 - 1.0 mm
Cycle Life (X103) 500 - 10,000

 

Force-Stroke Curve of Rubber Keypad


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Keypad Standard Dimensional Tolerances:

0.0-10.0 mm ±0.10 mm
10.1-20.0 mm ±0.15 mm
20.1-30.0 mm ±0.20 mm
30.1-40.0 mm ±0.25 mm
40.1-50.0 mm ±0.30 mm
50.1-100.0 mm ±0.35 mm
100.1 mm and more ±0.5%

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Life Test

Life Depends Mostly On:
▪ Material Hardness: 50 Shore A is preferred.
▪ Low Stroke: less than 1mm.
▪ Angle (As illustrated in A): 40° is recommended.
▪ Length of sidewall (As illustrated in B): longer is better.
▪ Thickness of sidewall (As illustrated in C): determined by key structure, thicker will have longer life.