Mobile device and hinge device

A portable device comprising:

• a first housing;
• a second housing;
• and
• a hinge assembly rotatably connecting said first housing and said second housing,
• characterized in that said second housing is connected to said first housing by said hinge assembly such that said second housing can revolve with respect to said first housing about a first rotation axis, said first rotation axis fixed in position with respect to said first housing, and said second housing can rotate about a second rotation axis, said second rotation axis fixed in position with respect to said second housing and extending parallel to said first rotation axis,
• at least a portion of said first housing and a portion of said second housing being arranged such that said portion of said first housing and said portion of said second housing are in general contact with each other or spaced from each other in a direction of said first rotation axis and said second rotation axis so that at least said portion of said first housing and said portion of said second housing overlap each other in said direction of said first rotation axis and said second rotation axis.