Display extension unit

Abstract

A display extension unit is disclosed. The present invention provides a display extension unit including a support, a link portion having one end coupled to a support, a driving part coupled to a joining point of the link portion, and a movable body coupled to the other end of the link portion, such that the movable body is separated from the support in accordance with the driving of the link portion.

1 . A display extension unit comprising:
 a support;   a link portion having one end coupled to the support;   a driving part coupled to a joining point of the link portion; and   a movable body coupled to the other end of the link portion, such that the movable body is separated from the support in accordance with the driving of the link portion.   
   
   
       2 . The display extension unit of  claim 1 , wherein the link portion comprises:
 a first hinge member coupled to the support;   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.   
   
   
       3 . The display extension unit of  claim 2 , wherein the driving part comprises:
 a motor unit; and   a rotary part coupled to a driving shaft of the motor unit,   and 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 to be in correspondence with the first link element or the second link element respectively.   
   
   
       4 . The display extension unit of  claim 2 , wherein the link portion comprises:
 a first guide member coupled to the support 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 each other,   and the other end of the first link element is movably coupled to the second guide element, and the other end of the second link element is movably coupled to the first guide element.   
   
   
       5 . The display extension unit of  claim 4 , wherein the driving part comprises:
 a motor unit; and   a driving part coupled to a driving shaft of the motor unit;   and wherein the motor unit is coupled to the first link element or the second link element where the first link element and the second link element intersect, and the rotary part is coupled to that one of the first link element or the second link element to which the motor unit is not coupled.   
   
   
       6 . The display extension unit of  claim 4 , wherein the driving part comprises:
 a motor unit; and   an extend portion coupled to a driving shaft of the motor unit and configured to extend along the length direction of the driving shaft according to the rotation of the motor unit,   and wherein the motor unit is coupled to the first guide member or the second guide member, the extend portion is coupled to one end of the second link element or the other end of the first link element to be in correspondence with the first guide member or the second guide member respectively.   
   
   
       7 . The display extension unit of  claim 2 , wherein the link portion comprises:
 a third hinge member coupled to the support while separated from the first hinge member;   a fourth hinge member coupled to the movable body while separated from the second hinge member;   a third link element having one end rotatably coupled to the other end of the first link element by way of an interposed fifth hinge member and having the other end rotatably coupled to the fourth hinge member; and   a fourth link element having one end rotatably coupled to the other end of the second link element by way of an interposed sixth hinge member and having the other end rotatably coupled to the third hinge member.   
   
   
       8 . The display extension unit of  claim 7 , further comprising a worm gear member, coupled with the fifth hinge member and the sixth hinge member, for adjusting the distance between the sixth hinge member and the fifth hinge member while rotating with the axis in the longitudinal direction. 
   
   
       9 . The display extension unit of  claim 8 , wherein the driving part comprises:
 a motor unit; and   a rotary part coupled to a driving shaft of the motor unit,   and wherein the rotary part is coupled to the worm gear member.   
   
   
       10 . The display extension unit of  claim 8 , wherein the worm gear member comprises:
 a first rod having a worm gear coupled with the fifth hinge member formed on one end;   a second rod having a worm gear coupled with the sixth hinge member formed on one end; and   a pipe having the other end of the first rod inserted in one end thereof and having the other end of the second rod inserted in the other end thereof,   and wherein a guide groove or a guide projection is formed in the longitudinal direction along the inner perimeter of the pipe, and a hole is formed at the other end of the first rod and the other end of the second rod in correspondence with the guide projection.   
   
   
       11 . The display extension unit of  claim 7 , further comprising a first gear coupled to the outer perimeter of the first hinge member, and a second gear coupled to the first gear and the outer perimeter of the third hinge member. 
   
   
       12 . The display extension unit of  claim 7 , wherein the display extension unit further comprises a first gear coupled to the outer perimeter of the second hinge member, and a second gear coupled to the first gear and the outer perimeter of the fourth hinge member. 
   
   
       13 . The display extension unit of  claim 12 , wherein the first gear and the second gear are coupled by an even number of idle gears. 
   
   
       14 . The display extension unit of  claim 12 , wherein the driving part comprises:
 a motor unit; and   a rotary part coupled to a driving shaft of the motor unit,   and wherein the rotary part is coupled to the first gear or the second gear.   
   
   
       15 . The display extension unit of  claim 14 , wherein the rotary part comprises:
 a clutch unit coupled to the driving shaft; and   a driven shaft positioned in contact with the clutch unit,   and wherein the driving force of the motor unit is smaller than the frictional force between the driven shaft and the clutch unit.   
   
   
       16 . The display extension unit of  claim 12 , wherein the driving part comprises:
 a motor unit; and   a rotary part coupled to a driving shaft of the motor unit,   and wherein the motor unit is coupled to the other end of the first link element or one end of the third link element,   and the rotary part is coupled to that one of the one end of the third link element or the other end of the third link element to which the motor unit is not coupled.   
   
   
       17 . The display extension unit of  claim 12 , wherein the driving part comprises:
 a motor unit; and   a rotary part coupled to a driving shaft of the motor unit,   and wherein the motor unit is coupled to the other end of the second link element or one end of the fourth link element,   and the rotary part is coupled to that one of the one end of the fourth link element or the other end of the second link element to which the motor unit is not coupled.   
   
   
       18 . The display extension unit of  claim 9 , wherein the rotary part comprises:
 a clutch unit coupled to the driving shaft; and   a driven shaft positioned in contact with the clutch unit,   and wherein the driving force of the motor unit is smaller than the frictional force between the driven shaft and the clutch unit.   
   
   
       19 . The display extension unit of  claim 18 , wherein the frictional force between the driven shaft and the clutch unit is smaller than the cogging torque of the motor unit. 
   
   
       20 . The display extension unit of  claim 18 , further comprising one or more washers interposed between the clutch unit and the driven shaft.