Patent ID: 6976799

Claim:
A keyboard attached to a personal digital assistant (PDA) set, comprising: hinge means having a connector to transmit a keyboard input signal to the PDA, and upper and lower hinge covers; a connection unit placed inside of the hinge means and attachable in a front direction and a back direction to the PDA such that the PDA can face toward or away from the keyboard; and a keyboard body connected with the hinge means, folded and unfolded about the hinge means, having a typing board on an upper side and a keypad formed therein to input a key pressed on the typing board, the hinge means being detachably disposed within the PDA between projections on opposite ends of a side of the PDA opposite the keyboard body and directly connected to the keyboard body, a portion of the keyboard body being rounded so that the keyboard body is folded against a screen of the PDA when attached in the front direction, and against a back of the PDA when attached in the back direction.