Patent ID: 8822861
Filing Date: 2014-09-02
Classification: G06F,H01H,H03K

Abstract:
1. A keypad assembly for a handheld electronic device, comprising: a keypad having a keypad portion which includes a plurality of keys, each key having an actuator post attached to a back side thereof; a dome switch sheet having a plurality of dome switches, each dome switch corresponding to a key of the keypad; a light guide sheet located between the keypad and the dome switch sheet for illuminating the keypad portion, the light guide sheet defining a plurality of holes extending through the light guide sheet, each hole having an axial length defined by a thickness of the light guide sheet, each hole axially receiving an actuator post of a respective key and providing a path for the actuator post of the respective key for travel to contact a respective dome switch; and for each hole in the light guide sheet, a plurality of separate elongate members positioned therein, extending along the entire axial length of the hole and positioned between an inner surface of the light guide sheet defined by the hole and the actuator post received in the hole, the plurality of elongate members frictionally engaging the actuator post received in the hole in the light guide sheet thereby resisting movement of the actuator post in a direction of actuation.