Patent ID: 7697965

Claim:
A mobile phone comprising: a housing including a hollow formed therein, wherein the hollow has an opening in an end of the housing; a display disposed on a front surface of the housing; a body movably engaged with the housing for being slidably moved into the hollow through the opening or being slidably moved towards outside of the hollow through the opening; an input device disposed on a front surface of the body, which is exposed outside of the hollow when the body is moved towards outside of the hollow; a circuit board installed within the body and operated by the input device, which includes electronic circuits and elements for controlling components of the housing, the display, the body, and the input device; a through hole penetrating the housing from the front surface thereof to the hollow, which includes an internal trough formed therein; a locking device installed within the through hole, which has one end extending to the outside of the housing and another end extending to the hollow, which comprises: an enlarged head disposed on the end of the locking device and extending to the outside of the housing; a flange disposed around an intermediate portion of the locking device and movably contained within the internal trough; and a bottom tip disposed on the another end of the locking device and extending to the hollow, wherein the bottom tip engages with a locking trough formed on the front surface of the body when the body is fully moved into the hollow and the enlarged head is depressed; and a resilient ring movably contained within the internal trough at a position near the hollow, which includes a central hole being passed through the bottom tip and is pressed by the flange; whereby, when the enlarged head is fully depressed and the flange presses a against the resilient ring, the resilient ring is deformed and then recovered to press the flange backward and move the locking device to release the bottom tip from the locking trough.