Custom rubber keypads push button membrane switch

Custom rubber keypads provide the touch surface for a push button membrane switch arrangement. They can be made as a group of keys or as individual button forms, with dimensions, color, and markings developed around the control panel. The rubber geometry and the switch beneath it need to work together through the entire press and release movement.

The first consideration is the distance between the resting key and its switching surface. Too much distance may require excessive travel; too little can leave the switch partly engaged after assembly. Panel thickness, internal supports, and the way the enclosure is tightened all contribute to this relationship. Assess the completed stack of parts rather than judging the loose keypad by its feel alone.

Key shape also affects presses made away from the center. A wide button can be approached at one end, so trials should include those less ideal finger positions. Adjacent controls should remain independent when a key is held down. After release, the key needs to return without catching the surrounding opening.

Printed, raised, recessed, or color-filled legends can identify the commands. Place those markings where they remain visible within the assembled panel and use a clear orientation across the key group. Keep the underside clean during assembly so that particles do not interfere with the switching interface or the free movement of the keys.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. The rubber geometry and the switch beneath it need to work together through the entire press and release movement.

Custom dimensions

After release, the key needs to return without catching the surrounding opening.

Fit & assembly

Keep the underside clean during assembly so that particles do not interfere with the switching interface or the free movement of the keys.

Use & inspection

Too much distance may require excessive travel; too little can leave the switch partly engaged after assembly.

Photos illustrate structure or material only. Key shape also affects presses made away from the center. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.