Intro: Why Tactile Feedback?
Silicone keypads are designed to provide a mechanical, tactile feedback when pressed. The feedback provides tactile clues that help us confirm if we have fully pressed a key or helps us prevent accidental presses.
Abatek has spent 20 years manufacturing input devices, such as silicone keypads, with mechanical tactile feedback. We have extensively studied and quantified the behavior of keys presses, and created processes so the key presses can meet spec.
This page first discusses how a key acts almost like a mechanical spring. The force vs. travel will be reviewed with respect to actuation force, snap and stroke. Longevity of the web is discussed in terms of Key Web life.
Next a brief section will discuss some force/snap/stroke suggestions depending on the type of keypad. A 2D drawing notes and performance section follow after that.
The force tolerance, which depends on factors like number of keys and force amount, is listed next.
Since Abatek will ultimately design the web, a section is devoted to how our customers should initially design the web.
The last sections of this page will discuss how to prevent key rocking as well as a brief over view of other types of actuations including teeter keys, silicone keypads with plastic key-tops and silicone Keypads with metal domes or tact switches.