Wearable display unit, headphones and system provided with these

Abstract

Inclination of an image display unit is prevented at the time of using a wearable display unit in which the image display unit can move between a projection position where the image display unit comes in front of a user's eye and a retracted position where the image display unit has been retracted from the front of the user's eye. A display support member 27 is prevented from rotating in relation to a display support member housing part 31 in a direction included in a plane perpendicular to the longitudinal direction of the display support member 27 , even in a state that the display support member can move. To that end, grooves 28 a , 28 b extending in the longitudinal direction are formed in the display support member 27 , while guide rollers 34 a , 34 a in contact with these grooves are provided within the display support member housing part 31.

1 . A wearable display unit provided with an image display unit for displaying an image in front of an eye of a user and, the image display unit of which can be arranged near a user's eye, comprising: 
 a display support member that has a bar shape and is fixed to said image display unit;    a display support member holding part that holds said display support member movably between a projecting position where said image display unit can be positioned in front of the eye of the user and a retracted position where said image display unit has been retracted from the front of the eye of the user; and    an anti-rotation means that prevents rotation of said display support member in relation to said display support member holding part in a neighborhood of, and including at least, said projecting position between said projecting position and said retracted position, with respect to rotation in a direction within a plane nearly perpendicular to a longitudinal direction of the display support member, even when said display support member is in a movable state.    
   
   
       2 . A wearable display unit according to  claim 1 , wherein said anti-rotation means comprises: 
 an anti-rotation-shape part formed, at least in a part of said display support member, to have an outer peripheral shape of a cross section having parts whose distances from a center of gravity in said cross section are different from each other, with said cross section being perpendicular to the longitudinal direction of the display support member; and    an abutting part that is a part of said display support member holding part and can not be rotated in a sense of said rotation, with said abutting part abutting on said anti-rotation-shape part of said display support member at least in said neighborhood of the projecting position.    
   
   
       3 . A wearable display unit according to  claim 1 , wherein said anti-rotation means comprises: 
 an anti-rotation-shape part formed, at least in a part of said display support member, to have an outer peripheral shape of a cross section different from a circle, with said cross section being perpendicular to the longitudinal direction of the display support member; and    an abutting part that is a part of said display support member holding part and can not be rotated in a sense of said rotation, with said abutting part abutting on said anti-rotation-shape part of said display support member at least in said neighborhood of the projecting position.    
   
   
       4 . A wearable display unit according to  claim 2 , wherein: 
 an outer peripheral shape of said cross section of said display support member is different between on a tip end side to which said image display unit is fixed and on a base end side opposite to said tip end side; and    said base end portion of the display support member forms said anti-rotation-shape part.    
   
   
       5 . A wearable display unit according to  claim 4 , wherein an outer peripheral shape of said cross section on said tip end side of said display support member is a circle.  
   
   
       6 . A wearable display unit according to  claim 2 , wherein: 
 said display support member is formed with a groove extending in said longitudinal direction; said display su port member holding part has a guide roller that is in contact with a surface of said display support member, with said surface being formed with said groove; and    a part of said display support member, said part having said grove, is said anti-rotation-shape part, and said guide roller is said abutting part.    
   
   
       7 . A wearable display unit according to  claim 1 , wherein: 
 said display support member holding part has a driving source that moves said display support member; and    a drive transmission part of said driving source is in contact with said display support member.    
   
   
       8 . A wearable display unit according to  claim 7 , further comprising a holding means that holds said drive transmission part toward said display support member.  
   
   
       9 . A wearable display unit according to  claim 1 , wherein: 
 said display support member has a shape curved in the longitudinal direction so that said shape extends along a head of the user; and    said image display unit can be moved in a locus corresponding to said curved shape, between said projecting position and said retracted position.    
   
   
       10 . A wearable display unit according to  claim 1 , wherein said display support member holding part comprises a display support member housing that houses said display support member at the retracted position.