Patent ID: 7786954

Claim:
A head-mount type display device that mounts on a head of a person to operate, said device comprising: a first display unit configured to irradiate an enlarged image to a left eye of the person; a second display unit configured to irradiate the enlarged image to a right eye of the person; a guide that guides the first and second display units to slide the first and second display units in a longitudinal direction of the display device; and an adjustment mechanism that adjusts a distance between the first and second display units, wherein the adjustment mechanism includes: a revolving member which includes a shaft, which is positioned between the first and second display units, and which is rotatably mounted to the display device such that the revolving member revolves around the shaft; a left-side arm having a first end that rotatively connects to the first display unit at a first pivot point and a second end that rotatively connects to the revolving member at a second pivot point located at a first position that is offset from the shaft by a predetermined distance; and a right-side arm having a third end that rotatively connects to the second display unit at a third pivot point and a fourth end that rotatively connects to the revolving member at a fourth pivot point located at a second position that is offset from the shaft by the predetermined distance, said second position facing the first position across the shaft; and wherein when the revolving member revolves around the shaft, the left-side arm pivots about the first and second pivot points, the right-side arm pivots about the third and fourth pivot points, and the first and second display units each slide along the guide in the longitudinal direction by a same distance relative to the shaft.