Patent ID: 8344965

Claim:
A head-mountable display device comprising: a frame, the frame comprising: a bridge portion extending in a first direction to a first side edge of the bridge portion, and extending in a second direction to a second side edge of the bridge portion; a connection portion connected to at least one edge portion of at least one of the first side edge and the second side edge, wherein the connection portion extends in a rearward direction away from the bridge portion along the at least one edge portion; and a temple portion rotatably connected to the connection portion, and configured to rotate around a rotation axis extending perpendicularly to the first and second directions; an image display unit comprising an optical system and configured to display an image; and a retaining mechanism configured to detachably hold the image display unit at the connection portion, wherein the retaining mechanism comprises: a first engagement portion connected to the connection portion; a second engagement portion positioned adjacent to the image display unit and configured to removably engage the first engagement portion; and a pressing portion positioned on the temple portion and configured to press the second engagement portion into the first engagement portion when the second engagement portion is engaged with the first engagement portion and the temple portion is rotated, such that the pressing portion is substantially parallel to the connection portion along the rearward direction.