Patent ID: 8680413

Claim:
An illuminating push-button device comprising: a key-top part having a key-top surface and a first protrusion that protrudes from a back side of said key-top surface; a key rubber part made of a transparent or semi-transparent elastic material and having a second protrusion that receives the first protrusion, said second protrusion being oriented in a common direction as said first protrusion; a switching device that opposes the second protrusion is positioned to be actuated in response to the key-top part being depressed; a lower front case; a light-source element that emits light from a light-emitting surface thereof; and a light-blocking sheet disposed between the light-source element and the key rubber part, wherein the light emitting surface faces in a direction of the light-blocking sheet, wherein said light-blocking sheet covers at least a portion of the light-emitting surface of the light-source element and has a loose hole through which the second protrusion of the key rubber part is passed, and wherein each of the protrusions faces in a direction of the switching device, wherein said key-top part, key rubber part and switching device are part of a first key assembly, and said device includes a second key assembly, said second key assembly also having a key-top part having a key-top surface, key rubber part, and switching device, wherein the key rubber part of the first key assembly and the key rubber part of the second key assembly are provided within the lower front case, wherein each key rubber part includes a projection that contacts the lower front case, and wherein a tip of each projection is bonded to the lower front case.