silicone elastic keypads/special-shape rubber keystrokes

Special-shape rubber keystrokes need a molded button profile that works with the intended direction of pressing. An irregular head can place the fingertip farther from the underlying actuator than a simple round key would. The flexible wall and supporting structure should account for that relationship.

Check the shape against the housing opening and the input mechanism together. A protruding corner may need clearance as the key moves, while the locating features must prevent the sheet from shifting toward an unintended position. The selected silicone formulation does not by itself establish a particular actuation force or cycle life.

Evaluate the finished control at the parts of the head users are likely to press, including its outer edges. Confirm that adjacent commands remain separate and that the key returns freely. During servicing, inspect for rubbing along the irregular outline and restore the intended orientation. A replacement with a similar top view but different underside geometry may change the keystroke even when it appears to fit the same opening.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. Evaluate the finished control at the parts of the head users are likely to press, including its outer edges.

Custom dimensions

A protruding corner may need clearance as the key moves, while the locating features must prevent the sheet from shifting toward an unintended position.

Fit & assembly

An irregular head can place the fingertip farther from the underlying actuator than a simple round key would.

Use & inspection

During servicing, inspect for rubbing along the irregular outline and restore the intended orientation.

Photos illustrate structure or material only. A protruding corner may need clearance as the key moves, while the locating features must prevent the sheet from shifting toward an unintended position. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.