Patent ID: 8537541

Claim:
A laptop comprising: a main body comprising a housing, the housing comprising a keyboard surface and a body sidewall connecting the keyboard surface, the housing defining a receiving groove in the keyboard surface adjacent to the body sidewall, a first through hole in a bottom surface of the receiving groove adjacent to the body sidewall, and a second through hole in the body sidewall aligned with the receiving groove; a touchpad received in the receiving groove and capable of sliding in the receiving groove along a direction that is substantially perpendicular to the body sidewall; and an ejection mechanism receiving in the housing and comprising: an ejection header fittingly received in the first through hole and capable of sliding along a depthwise direction of the first through hole; a spiral cam having an axle and a spiral toothed side surface, the spiral cam being rotatably connected to the ejection header via the axle; a rack arranged along a direction that is substantially parallel to both the keyboard surface and the body sidewall and engaged with the toothed side surface; and a linkage rod comprising a drive wire and an operation wire, the drive wire being arranged along the direction that is substantially parallel to both the keyboard surface and the body sidewall and connected to the rack, the operation wire being arranged along a direction that is substantially perpendicular to the body sidewall, protruding from the housing via the second through hole, and connecting to the drive wire; wherein the spiral cam is arranged such that, when pushing the operation wire along the direction that is substantially parallel to both the keyboard surface and the body sidewall towards a predetermined direction, a distance between the axle and a point of the tooted side surface engaging the rack increases so as to drive the ejection header move towards the touchpad to eject the touchpad up.