Hinge structure for foldable display terminal

Abstract

A hinge structure for a foldable display terminal is provided. The hinge structure for a foldable display terminal having a flexible display panel installed therein is foldable inward and outward in a fully unfolded state such that the flexible display panel is disposed inside and outside and a screen on which an image such as a moving image is displayed is invisibly disposed inside or visibly disposed outside in a state in which the foldable display terminal is folded.

1 . A hinge structure for foldable display terminal, the hinge structure comprising:
 Each upper panels ( 10 ) are provided on right and left sides of a central joint ( 40 ) and that are foldable with respect to the central joint ( 40 );   wherein the two upper panels ( 10 ) are rotatably connected to the central joint ( 40 ),   wherein elastic modules are provided on each of the right and left sides of the central joint ( 40 ),   
     
     
         2 . The hinge structure for foldable display terminal according to  claim 1 ,
 wherein an upper slider ( 12 ) is connected to the elastic module,   wherein a push member ( 84 ) having a rotatable rotational member ( 50 ) installed therein is provided in the push member ( 84 ),   wherein the push member ( 84 ) is slidably inserted into a sliding rail of an open groove of the upper slider ( 12 ) and an elastic force is applied thereto in a direction in which the push member is compressed by an elastic member ( 49 ).   
     
     
         3 . The hinge structure for foldable display terminal according to  claim 1 ,
 wherein a rotational member ( 50 ) that is rotatably provided in the push member ( 84 ), and   wherein an elastic force is applied to the upper panels ( 10 ) in two opposite directions with respect to the central joint ( 40 ) when the upper panels ( 10 ) are being folded or unfolded.   
     
     
         4 . The hinge structure for foldable display terminal according to  claim 1 , wherein upper joints ( 41 ,  42 ) that are provided on the right and left sides of a top of the central joint ( 40 ) and that are connected to the upper panels ( 10 ) and connected to each other. 
     
     
         5 . The hinge structure for foldable display terminal according to  claim 1 , wherein the central joint ( 40 ) includes a four-axis gear in which rotational bars ( 44 ) and gears ( 45 ) engaging with the rotational bars ( 44 ) are coupled to each other,
 wherein the rotational bars ( 44 ) engaging with each other is configured to rotate simultaneously in two opposite directions, and   wherein an elastic drive member including a front rod ( 62 ), a shaft ( 64 ) that is inserted into the front rod ( 62 ), an elastic member ( 49 ) such as a coil spring that is fitted onto the shaft ( 64 ), and a rear rod ( 66 ) into which the shaft ( 64 ) is inserted is provided on two opposite sides of the rotational bar ( 44 ).   
     
     
         6 . The hinge structure for foldable display terminal according to  claim 1 , wherein a range in which the push member ( 84 ) is able to move in the sliding rail ( 31 ) is limited depending on a length of a guide groove ( 86 ).