Abstract: A hand-held device enclosure is disclosed. The hand-held device includes a front cover, a back cover, and a frame. The frame defines a plurality of honeycomb holes therein, is configured for fixing a printed circuit board, and is interposed between the front cover and the back cover. The front cover, the back cover, and the frame are connected using screws. The enclosure has good structural strength and is light because of the honeycomb structure.

Abstract: A navigational device is disclosed. The navigational device includes a rotatable wheel. The rotatable wheel is attached in a wheel frame with a first rotatable member. The wheel frame is attached in a chassis with a second rotatable member. The navigational device further comprises a switch. The rotatable wheel pushes the wheel frame to rotate while the rotatable wheel is pressed down. The switch is closed due to a pressure by the wheel frame or the chassis. The rotatable wheel rotates with the wheel frame while being pressing down. The movement is stable without shaking.