Display extension unit

Abstract

The present invention relates to a display extension unit. The display extension unit includes a fixed body, a link portion having one end coupled to the fixed body; a movable body coupled to the other end of the link portion, and a driving part coupled to the joining point of the link portion, where the driving part includes a motor unit and a rotary part coupled to the driving shaft of the motor unit, with the rotary part including a clutch coupled to the driving shaft and a driven shaft positioned in contact with the clutch, and where the driving force of the motor unit is smaller than the frictional force between the driven shaft and the clutch.

1 . A display extension unit comprising:
 a fixed body;   a link portion having one end coupled to the fixed body;   a movable body coupled to the other end of the link portion; and   a driving part coupled to the joining point of the link portion,   wherein the driving part comprises:
 a motor unit; and 
 a rotary part coupled to the driving shaft of the motor unit; 
   the rotary part comprises:
 a clutch coupled to the driving shaft; and 
 a driven shaft positioned in contact with the clutch; 
   and the driving force of the motor unit is smaller than the frictional force between the driven shaft and the clutch.   
   
   
       2 . The display extension unit of  claim 1 , wherein the frictional force between the driven shaft and the clutch is smaller than the cogging torque of the motor unit. 
   
   
       3 . The display extension unit of  claim 2 , wherein the display extension unit further comprises one or more washers interposed between the clutch and driven shaft. 
   
   
       4 . The display extension unit of  claim 2 , wherein the link portion comprises:
 a first hinge member coupled to the fixed body;   a second hinge member coupled to the movable body;   a first link element having one end rotatably coupled to the first hinge member; and   a second link element having one end rotatably coupled to the second hinge member.   
   
   
       5 . The display extension unit of  claim 4 , wherein the motor unit is coupled to the first hinge member or the second hinge member, and the rotary part is coupled to the first link element or the second link element, the first link element and the second link element coupled in correspondence with the first hinge member and the second hinge member, respectively. 
   
   
       6 . The display extension unit of  claim 4 , wherein the link portion comprises:
 a first guide member coupled to the fixed body while separated from the first hinge member; and   a second guide member coupled to the movable body while separated from the second hinge member,   and wherein the first link element and the second link element intersect,   and the other end of the first link element is coupled to be movable along the second guide element, and the other end of the second link element is coupled to be movable along the first guide element.   
   
   
       7 . The display extension unit of  claim 6 , wherein the driving part is coupled to the part where the first link element and the second link element intersect, the motor unit is coupled to the first link element or the second link element, and the rotary part is coupled to that one of the first link element and the second link element to which the motor unit is not coupled. 
   
   
       8 . The display extension unit of  claim 4 , wherein the link portion comprises:
 a third hinge member coupled to the fixed body while separated from the first link element;   a fourth hinge member coupled to the movable body while separated from the second link element;   a third link member having one end rotatably coupled to the other end of the first link member with an interposed fifth hinge member and having the other end rotatably coupled to the fourth hinge member; and   a fourth link member having one end rotatably coupled to the other end of the second link member with an interposed sixth hinge member and having the other end rotatably coupled to the third hinge member.   
   
   
       9 . The display extension unit of  claim 8 , further comprising a first gear coupled to the outer perimeter of the first hinge member, and a second gear coupled the first gear and the outer perimeter of the third hinge member. 
   
   
       10 . The display extension unit of  claim 9 , wherein the first gear and the second gear are coupled by an even number of idle gears. 
   
   
       11 . The display extension unit of  claim 9 , wherein the rotary part is coupled to the first gear or the second gear 
   
   
       12 . A display extension unit comprising:
 a fixed body;   a link portion comprising a first link arm and a second link arm respectively having one end coupled to the fixed body;   a movable body coupled to the other end of the first link arm or the second link arm; and   a driving part coupled to the first link arm or the second link arm,   wherein the driving part comprises:
 a motor unit coupled to the first link arm or the second link arm; 
 a driving shaft having one end coupled to the motor unit to rotate; 
 a pipe having a penetration hole formed therein, the other end of the driving shaft being inserted through one side of the penetration hole; and 
 a fixed shaft having one end inserted through the other side of the penetration hole and having the other end coupled to the first link arm or the second link arm in correspondence with the motor unit. 
   
   
   
       13 . The display extension unit of  claim 12 , wherein the one side of the penetration hole and the other end of the rotary shaft are coupled by guide-joining or screw-joining, and the other side of the penetration hole and the one end of the fixed shaft are coupled by guide-joining or screw-joining in correspondence with the joining of the one side of the penetration hole and the other end of the rotary shaft