Patent ID: 7512428

Claim:
A twist-type mobile terminal, comprising: a lower housing portion having a key pad; an upper housing portion having a display unit; and a hinge device having a first bevel gear fixed to an upper end part of the lower housing portion, and a second bevel gear fixed to a lower end part of the upper housing portion, wherein the first and second bevel gears are engaged with each other to twist-rotate the upper housing portion while the upper housing portion is opened or closed; wherein the hinge device further comprises a hinge member which provides an elastic force for folding/unfolding the lower housing portion and the upper housing portion and for rotating the upper housing portion about a vertical shaft, wherein the first bevel gear is integrated with one end of the hinge member, wherein the hinge member includes: a horizontal shaft having one end coupled to the first bevel gear; a first cam fixed to the lower housing portion together with the other end of the horizontal shaft; a second cam engaged with the first cam, for rotating about the horizontal shaft and straightly moving in a longitudinal direction of the horizontal shaft by a mutual cam operation with the first cam; and an elastic unit for providing a restoring force against the straight movement of the second cam.