User's Manual

Viewsonic Tweety RF Remote
Rev 2.9A November 05, 2001
Universal Electronics Inc. Confidential
Page 49 of 63
7.3.3 Force Vs. Travel
The force values are represented by gram and the travel values are represented by
millimeter.
P1 (Peak force) = General range: 200±50 grams and it is dependent on specific
product application; therefore, see the keypad part drawing for
exact specification.
P2 (Contact force) = General range: 50-90% of P1.
PR (Return force) = 40 grams minimum.
S (Travel) = 0.4 ± 0.1mm and it is dependent on specific product
application; therefore, see the keypad part drawing for exact
specification.
PR
P2
P1
Travel (mm)
Force
(gram)
Figure 1: Force vs. travel
S
Peak force, P1 Return force, PR Snap ratio, TR Stroke, S
Rubber keypad
only
150±30 grams 40 grams minimum 40% to 60% 1.0±0.2mm
Keypad with
polydome
200±30 grams 40 grams minimum 40% to 70% 0.4±0.1mm