A hinge device of an information terminal, wherein the information terminal comprises
a main body, a sub-body to be opened away from or closed to the main body while
rotating about a hinge axis extending in one direction of the main body, and the
hinge device for rotatably coupling the main body to the sub body. The hinge device
comprises a driving part generating a driving force for rotating the sub body,
and a clutch part for rotating the sub-body by the driving force of the driving
part. When the sub-body rotates by external force, the clutch part prevents rotating
force of the sub-body from being transmitted to the driving part. Such a hinge
device configured as stated above allows the user to automatically open and close
the sub-body of the information terminal by virtue of a driving motor provided
therein, as well as to manually open and close it. Further, the user can freely
adjust an opening angle of the sub-body to various angles, resulting in improvement
in convenience of use. Furthermore, a clutch function provided in the hinge device
prevents external force from affecting the driving motor.
