Patent Publication Number: US-2023156941-A1

Title: Hinge component, foldable screen assembly and foldable terminal device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims the benefit of priority to Chinese Application No. 202111355108.9, filed on Nov. 16, 2021, the contents of which are incorporated herein by reference in their entireties for all purposes. 
     BACKGROUND 
     With the development of electronic products, flexible, foldable screens are widely used in electronic product display terminals, such as mobile phones, computers, and other terminal devices, and the resultant mobile phone and computer with a foldable screen will become development trends in the future. For a terminal device which is foldable in form, a hinge component is very important, and performance of the hinge may directly affect the function and user experience of the whole device. 
     At present, the hinge component for achieving the folding function of the foldable screen occupies a relatively large space, which is not conducive to the lightweight structure stacking of the terminal device. Moreover, during the folding of the flexible screen, the hinge component cannot be effectively fitted with and fully support the flexible screen, thus resulting in wrinkles and deformation due to pulling during the folding of the flexible screen. 
     SUMMARY 
     The present disclosure relates to a field of hinge connection, and more particularly to a hinge component, a foldable screen assembly and a foldable terminal device. 
     Embodiments of a first aspect of the present disclosure provide a hinge component. The hinge component includes a support assembly and a linkage assembly, the support assembly includes at least three support members, the at least three support members are arranged side by side, and two adjacent support members are movably connected. The linkage assembly is connected with the at least three support members to achieve a mutual linkage of the at least three support members. 
     Embodiments of a second aspect of the present disclosure further provide a foldable screen assembly, and the foldable screen assembly includes a flexible screen and a hinge component. The flexible screen is on the hinge component and covers the hinge component. The hinge component includes a support assembly and a linkage assembly, the support assembly includes at least three support members, the at least three support members are arranged side by side, and two adjacent support members are movably connected. The linkage assembly is connected with the at least three support members to achieve a mutual linkage of the at least three support members. 
     Embodiments of a third aspect of the present disclosure further provide a foldable terminal device, and the foldable terminal device includes a foldable screen assembly. The foldable screen assembly includes a flexible screen and a hinge component. The flexible screen is on the hinge component and covers the hinge component. The hinge component includes a support assembly and a linkage assembly, the support assembly includes at least three support members, the at least three support members are arranged side by side, and two adjacent support members are movably connected. The linkage assembly is connected with the at least three support members to achieve a mutual linkage of the at least three support members. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic view of a hinge component according to an embodiment of the present disclosure. 
         FIG.  2    is a schematic view of a support member according to an embodiment of the present disclosure. 
         FIG.  3    is another schematic view of a hinge component according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The principle of a hinge component for achieving the screen folding in the related art is described as follows. In order to better understand the technical solution in the related art, the technical solution in the related art is described in a condition that a length direction of a support member is consistent with a front-rear direction, a thickness direction of the support member is consistent with an up-down direction, and a width direction of the support member is consistent with a left-right direction. For purposes of discussions herein, references to the left-right direction, the up-down direction and the front-rear direction will correspond to those shown in  FIG.  1   . 
     The hinge component in the related art includes a support member and a linkage assembly on the support member, and the hinge component is configured to connect a housing with a screen (a flexible screen) of a mobile phone. Specifically, more than one support member is arranged side by side in a certain order, such as from left to right or from right to left, and the more than one support member together serves as a base below the screen and configured to support the screen. The support member has two opposite sides in the thickness direction. In other words, the support member has an upper surface and a lower surface opposite to each other in the up-down direction, the linkage assembly is below the lower surface of the support member, and the screen is above the upper surface of the support member. The hinge component may connect the housing with the screen of the mobile phone, by being connected to the screen through studs or holes on leftmost and rightmost support members, and by being connected to a middle frame of the housing of the mobile phone via a screw, so as to achieve the folding of the screen by means of the synchronous movement and rotation of the linkage assembly. 
     However, the support members are linked only by the linkage assembly, so that the hinge component occupies a relatively large space, which is not conducive to the lightweight structural stacking of a terminal device, and also the hinge component cannot be effectively fitted with and fully support the screen, thus resulting in defects such as wrinkles and deformation due to pulling during the folding of the screen. Therefore, an urgent technical problem to be solved by those skilled in the related art is how to effectively overcome the technical defects that the hinge component occupies a relatively large space and cannot be effectively fitted with and fully support the screen in the related art. 
     Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions. The embodiments described below with reference to the accompanying drawings are exemplary, are merely used to explain the present disclosure, and cannot be construed to limit the present disclosure. 
     As shown in  FIGS.  1  to  3   , an embodiment of the present disclosure proposes a hinge component  100  including a support assembly  1  and a linkage assembly  2 , the support assembly  1  includes at least three support members  11 , the at least three support members  11  are arranged side by side in a length direction, and two adjacent support members  11  are movably connected. The linkage assembly  2  is connected with the at least three support members  11  to achieve a mutual linkage of the at least three support members  11 . 
     Specifically, as shown in  FIG.  1   , the support assembly  1  in this embodiment has two opposite sides in a thickness direction, that is, the support assembly  1  has an upper surface and a lower surface opposite to each other in an up-down direction. The linkage assembly  2  is below the lower surface of the support assembly  1 , and a screen is above and covers the upper surface of the support assembly  1 . In this embodiment, left and right ends of the screen may be bent and folded synchronously towards a side where the linkage assembly  2  is, as shown in  FIG.  3   , and the linkage assembly  2  in this embodiment ensures the synchronous movement of the at least three support members  11  that are symmetrical. 
     In order to better understand the technical solution of the present disclosure, the technical solution in the present disclosure is described in a condition that a length direction of the support member  11  is consistent with a front-rear direction, a thickness direction of the support member  11  is consistent with an up-down direction, and a width direction of the support member  11  is consistent with a left-right direction. The left-right direction, the up-down direction and the front-rear direction are shown in  FIG.  1    and  FIG.  3   . 
     Specifically, as shown in  FIG.  1   , in this embodiment, the at least three support members  11  are arranged side by side, which may be understood as that the at least three support members  11  are arranged side by side in a certain order, such as from left to right, and adjacent support members  11  are movably connected. For example, a support member B and a support member C are at a left side and a right side of a support member A, respectively, and both the support member B and the support member C may rotate relative to the support member A. 
     In this embodiment, through the movable connection between the two adjacent support members  11 , the support members  11  may be further refined. That is, in the case of supporting the same screen, compared with the related art, the number of the support members  11  may be increased and the width of the support member  11  may be reduced in this embodiment, so as to achieve a purpose of refining support areas, thus overcoming the technical defect of the large space occupation of the hinge component  100  as a whole, and promoting the lightweight structure stacking of the terminal device. Moreover, the hinge component  100  may be effectively fitted with and fully support the screen, so as to overcome the technical defects of wrinkles and deformation due to pulling during the folding of the screen in the related art. 
     It may be understood that the screen in this embodiment may be a display screen, in particular, a flexible screen, of a terminal device such as a mobile phone and a computer. The flexible screen may be understood by those skilled in the related art as a light and non-fragile display screen which has characteristics of a traditional flat panel display screen and is manufactured on a flexible substrate that can be bent, flexed, folded, twisted or rolled. 
     In some embodiments, each support member  11  includes at least two guide portions  102 , and the guide portions  102  face towards two sides of the support member  11  in the width direction and are movably connected with the guide portions  102  on an adjacent support member  11 . The guide portions  102  are configured to guide and limit the adjacent support members  11  during the rotation of the hinge component  100 . 
     Specifically, as shown in  FIG.  1   , each support member  11  is provided with at least two guide portions  102 , the two guide portions  102  are located at two ends of the support member  11  in the length direction, respectively, that is, one guide portion  102  is located at a front end of the support member  11  and the other guide portion  102  is located at a rear end of the support member  11 . Two guide portions face towards a left side and a right side of the support member  11 , respectively. For example, the guide portion  102  facing leftwards (i.e. towards the left side of the support member  11 ) of the support member  11  is movably connected with the guide portion  102  facing rightwards (i.e. towards the right side of another support member  11 ) of another support member  11  adjacent to the left side of this support member  11 . According to this law, the at least three support members  11  are arranged side by side, and the adjacent support members  11  are movably connected. 
     It may be understood that the guide portion  102  is arranged or coupled to the support member  11  by means of one of fixing, detachable connection or integrated molding. 
     In some embodiments, the guide portion  102  includes a first guide portion  1021  and a second guide portion  1022 . At least one first guide portion  1021  and at least one second guide portion  1022  are on the support member  11  (i.e. each support member  11 ). The first guide portion  1021  and the second guide portion  1022  extend towards two sides of the support member  11  in the width direction and beyond edges of the corresponding sides of the support member  11 , and the first guide portion  1021  of the support member  11  is movably connected with the second guide portion  1022  of the adjacent support member  11 . 
     At least one first guide portion  1021  and at least one second guide portion  1022  being on the support member  11  may be understood as at least two following solutions. 
     The first technical solution is that one first guide portion  1021  and one second guide portion  1022  are on the support member  11 . In this case, the support member  11  is movably connected with the left and right adjacent support members  11  through the one first guide portion  1021  and the one second guide portion  1022 . That is, there is only one movable connection joint between the adjacent support members  11 , and the stability between the support members  11  is relatively poor. 
     The second technical solution is that more than one first guide portion  1021  and more than one second guide portion  1022  are on the support member  11 . Similarly, in this case, the support member  11  is movably connected with the second guide portions  1022  and the first guide portions  1021  at the left and right adjacent support members  11  through the more than one first guide portion  1021  and the more than one second guide portion  1022 , respectively. It may be understood that for the support member  11  provided with the more than one first guide portion  1021  and the more than one second guide portion  1022 , compared with the support member  11  provided with the one first guide portion  1021  and the one second guide portion  1022 , there are more movable connection joints between the support member  11  and the adjacent support member  11 . Although the stability of the hinge component  100  is stronger, it is not conducive to the lightweight structure stacking of the hinge component  100 . 
     As shown in  FIGS.  1  and  2   , two first guide portions  1021  and two second guide portions  1022  are on the support member  11 , and the first guide portion  1021  and the second guide portion  1022  are located at the front end and the rear end of the support member  11 , respectively, and face towards the left side and the right side of the support member  11 , respectively. For example, the first guide portion  1021  extends rightwards, and an end of the first guide portion  1021  extends beyond an edge of the right side of the support member  11 . Similarly, the second guide portion  1022  extends leftwards, and an end of the second guide portion  1022  extends beyond an edge of the left side of the support member  11 , so as to achieve the movable connection between the first guide portion  1021  of the support member  11  and the second guide portion  1022  of the adjacent support member  11 . Furthermore, each support member  11  and its left and right adjacent support members  11  have one movable connection joint at either of the front end and the rear end of each support member  11 , so as to achieve the stable connection of the at least three support members  11 , and facilitate the lightweight structure stacking of the hinge component  100 . 
     It may be understood that the relative positions of the first guide portions  1021  and the second guide portions  1022  of the adjacent support members  11  are not limited in the present invention, as long as the first guide portion  1021  and the second guide portion  1022  of the support member  11  can be fitted with the second guide portion  1022  and the first guide portion  1021  of the adjacent support member  11 , respectively. 
     For example, in  FIG.  1   , at the front end and the rear end of the support member  11 , the first guide portion  1021  and the second guide portion  1022  of the support member  11  on the right side are alternated with the first guide portion  1021  and the second guide portion  1022  of the adjacent support member  11  on the left side, in the length direction of the support member  11 . For another example, in  FIG.  2   , at the front end of the support member  11 , the first guide portion  1021  and the second guide portion  1022  of the support member  11  on the right side are arranged between the first guide portion  1021  and the second guide portion  1022  of the adjacent support member  11  on the left side, in the length direction of the support member  11 , while at the rear end of the support member  11 , the first guide portion  1021  and the second guide portion  1022  of the adjacent support member  11  on the left side are arranged between the first guide portion  1021  and the second guide portion  1022  of the support member  11  on the right side, in the length direction of the support member  11 . That is,  FIG.  1    and  FIG.  2    illustrate different examples of the support member  11  with regard to the relative positions of the first guide portions  1021  and the second guide portions  1022  of the adjacent support members  11 . 
     In some embodiments, the support member  11  includes a first body  13  and at least one first connecting portion  12 . The first connecting portion  12  is connected with the first body  13  and is located on at least one side of the first body  13  in a thickness direction of the first body  13 . At least one first guide portion  1021  and at least one second guide portion  1022  are on each first connecting portion  12 . It may be understood that the first connecting portion  12  is configured to carry the first guide portion  1021  and the second guide portion  1022 . 
     In this embodiment, the thickness direction of the first body  13  is consistent with the up-down direction in  FIG.  1   . It may be understood that the first body  13  has an upper surface and a lower surface opposite to each other in the up-down direction, and the first connecting portion  12  is below the lower surface of the first body  13 , or the first connecting portion  12  is above the upper surface of the first body  13 , or the first connecting portions  12  are below the lower surface of the first body  13  and above the upper surface of the first body  13 . Advantageously, the first connecting portion  12  is below the lower surface of the first body  13 , and the flexible screen is above and directly covers the upper surface of the first body  13  to achieve the connection between the first body  13  and the flexible screen. 
     The support member  11  is provided with at least one first connecting portion  12 , and each first connecting portion  12  is provided with at least one first guide portion  1021  and at least one second guide portion  1022 , which may be understood as that one or more first connecting portions  12  are on the support member  11 , and each first connecting portion  12  is provided with at least one first guide portion  1021  and at least one second guide portion  1022 , which may be understood in the same manner as that at least one first guide portion  1021  and at least one second guide portion  1022  are on the support member  11 , and thus is not repeated herein. 
     It may be understood that the first connecting portion  12  may be a protrusion on the lower surface of the support member  11 , and the protrusion extends towards and even beyond the left side or the right side of the support member  11 . The first guide portion  1021  and the second guide portion  1022  may include a groove and/or a lever integrated with or mounted to the protrusion, as described in detail below. 
     In some embodiments, the first guide portion  1021  includes a first sliding groove  10211  and/or a first lever  10212 . When the first guide portion  1021  is the first sliding groove  10211 , the second guide portion  1022  includes a second lever  10222 , and the second lever  10222  of the second guide portion  1022  is slidably connected in the first sliding groove  10211 . The first lever  10212  includes a rotating shaft structure  101 . When the first guide portion  1021  is the first lever  10212 , the second guide portion  1022  includes a second sliding groove  10221 , and the first lever  10212  is slidably connected in the second sliding groove  10221  of the second guide portion  1022  through the rotating shaft structure  101 . The first sliding groove  10211  and the second sliding groove  10221  may be closed arc grooves. 
     It should be understood that, the first guide portion  1021  includes the first sliding groove  10211 , or the first guide portion  1021  includes the first lever  10212 , or the first guide portion  1021  includes the first sliding groove  10211  and the first lever  10212 . 
     When the first guide portion  1021  includes the first sliding groove  10211 , the second guide portion  1022  includes the second lever  10222 , the first sliding groove  10211  and the second lever  10222  face towards a left side and a right side of the first body  13 , respectively, and the first sliding groove  10211  is slidably connected with the second lever  10222  on the adjacent first body  13 . Similarly, when the first guide portion  1021  includes the first lever  10212 , it is the same as the above situation and is not repeated herein. 
     Specifically, as shown in  FIG.  2   , when the first guide portion  1021  includes the first sliding groove  10211  and the first lever  10212 , the second guide portion  1022  includes the second lever  10222  and the second sliding groove  10221 . For example, the first sliding groove  10211  and the first lever  10212  face towards the right side of the first body  13 . In some embodiments, the first sliding groove  10211  and the first lever  10212  are located at a front end and a rear end of the first body  13 , respectively. The second sliding groove  10221  and the second lever  10222  face towards the left side of the first body  13  and are located at the front end and the rear end of the first body  13 , respectively. The first sliding groove  10211  is slidably connected with the second lever  10222  on the right adjacent first body  13 , and the first lever  10212  is slidably connected with the second sliding groove  10221  on the right adjacent first body  13 . 
     For example, as shown in  FIG.  2   , the first sliding groove  10211  and the second sliding groove  10221  may be provided with an opening, the first lever  10212  and the second lever  10222  include a rotating shaft structure  101 , and the rotating shaft structure  101  may be understood as a pin shaft. One end of the pin shaft is mounted to the first lever  10212  through a pin hole formed in the first lever  10212 , and the other end of the pin shaft passes through the opening formed in the first sliding groove  10211 , so as to achieve the sliding connection between the first lever  10212  and the second sliding groove  10221 . In this embodiment, the first guide portion  1021  includes the first sliding groove  10211  and the first lever  10212 , and hence the hinge component  100  has higher flexibility, compared with the first guide portion  1021  including the first sliding groove  10211  or the first lever  10212 . 
     In some embodiments, the number of the support members  11  is an odd number. 
     The minimum number of the support members  11  may be three or other odd numbers such as five, seven and nine. The linkage assembly  2  may ensure the synchronous movement of the movably connected support members  11  on left and right sides. Moreover, the number of the support members  11  is an odd number not less than three, which can ensure that the middlemost support member  11  of the support assembly  1  is motionless, while the support members  11  at the left and right sides move leftwards or rightwards synchronously relative to the middlemost support member  11 , so as to ensure the maximum fit to the flexible screen. 
     In some embodiments, the linkage assembly  2  includes a first sliding seat  21  and a synchronizer  22 , and the first sliding seat  21  is arranged on one of the support members  11 . One end of the synchronizer  22  is slidably connected with the first sliding seat  21 , and the other end of the synchronizer  22  is hinged with another support member  11 . 
     For example, the first sliding seat  21  is arranged on a first one of the at least three support members  11 , and the other end of the synchronizer  22  is hinged with a second one of the at least three support members  11 . 
     Specifically, as shown in  FIG.  1   , two first sliding seats  21  are symmetrically arranged on left and right sides of the support assembly  1 , and the two first sliding seats  21  are located on two support member  11  of the support assembly  1  and are mirrored with each other. Two synchronizers  22  are provided. One end of the synchronizer  22  is slidably connected with the first sliding seat  21  on one side, and the other end of the synchronizer  22  is hinged with the middle support member  11  of the support assembly  1 . It may be understood that when the support members  11  at the left and right sides of the support assembly  1  rotate relative to the middlemost support member  11 , respectively, one end of each of the two synchronizers  22  at the left and right sides is synchronously hinged with the middle support member  11 , and the other ends of the synchronizers  22  slide in the first sliding seats  21  on the two sides, so as to achieve that the support members  11  at the left and right sides of the support assembly  1  can move leftwards or rightwards synchronously relative to the middle support member  11 . In this embodiment, the middle support member  11  may be the middlemost support member  11 . 
     In some embodiments, the linkage assembly  2  includes a swing arm assembly  23  on at least one support member  11  side by side with the first sliding seat  21  and the synchronizer  22 . 
     Specifically, as shown in  FIG.  1    and  FIG.  3   , the linkage assembly  2  also includes the swing arm assembly  23 , and the swing arm assembly  23  is arranged side by side with the first sliding seat  21  and the synchronizer  22  in the front-rear direction of the support member  11 . It may be understood that when the support assembly  1  includes three or five support members  11 , the first sliding seats  21  are mirrored and symmetrically arranged on the leftmost and rightmost support members  11 , one ends of the two synchronizers  22  are connected with the first sliding seats  21  at the left and right sides, respectively, and the other ends of the two synchronizers  22  are hinged with the middlemost support member  11  of the support assembly  1 , so as to achieve that the support members  11  at the left and right sides of the support assembly  1  can rotate leftwards or rightwards synchronously relative to the middle support member  11 . In this embodiment, the middle support member  11  may be the middlemost support member  11 . 
     When the support assembly  1  includes seven support members  11 , the above arrangement cannot achieve that individual support members  11  at the left and right sides of the support assembly  1  can rotate leftwards or rightwards synchronously relative to the middle support member  11 . In this embodiment, the middle support member  11  may be the middlemost support member  11 . Advantageously, the swing arm assembly  23  may be provided, the five support members  11  at the middle of the support assembly  1  may be arranged as the above arrangement of the synchronizers  22  and the first sliding seats  21 , the swing arm assembly  23  is configured to connect the support member  11  on an outer side with the support member  11  on an inner side, such that the support member  11  on the outer side is linked with the support member  11  on the inner side. It may be understood that the support members  11  at the middle of the support assembly  1  include the support member  11  on the inner side. 
     It may be understood that when the number of the support members  11  in the support assembly  1  is greater than seven, one swing arm assembly  23  needs to be added for each additional two support members  11 , so as to achieve that the individual support members  11  at the left and right sides of the support assembly  1  can move leftwards or rightwards synchronously relative to the middle support member  11 . In this embodiment, the middle support member  11  may be the middlemost support member  11 . 
     In some embodiments, the swing arm assembly  23  includes a second fixed seat  231 , a swing arm  232  and a second sliding seat  233 , and the second fixed seat  231  is fixed on one of the support members  11 . One end of the swing arm  232  is hinged with the second fixed seat  231 , the other end of the swing arm  232  is slidably connected with the second sliding seat  233 , and the second sliding seat  233  is fixed on another support member  11 . 
     For example, the second fixed seat  231  is fixed on a third one of the at least three support members  11 , and the second sliding seat  233  is fixed on a fourth one of the at least three support members  11 . 
     Specifically, as shown in  FIG.  1    and  FIG.  3   , two second sliding seats  233  are provided, located on the leftmost and rightmost support members  11 , respectively, and mirrored with each other. Two second fixed seats  231  are provided. The support member  11  provided with the second fixed seat  231  is located between the support member  11  provided with the first sliding seat  21  and the support member  11  hinged with the synchronizer  22 , and the support member  11  provided with the first sliding seat  21  is located between the support member  11  provided with the second sliding seat  233  and the support member  11  provided with the second fixed seat  231 . One end of the swing arm  232  is connected with the second sliding seat  233  and configured to slide relative to the second sliding seat  233 , and the other end of the swing arm  232  is hinged with the second fixed seat  231 . 
     When the support members  11  at the left and right sides of the support assembly  1  rotate relative to the middlemost support member  11 , respectively, the support members  11  provided with the second sliding seat  233  and the second fixed seat  231  are linked with the support members  11  provided with the first sliding seat  21  and the synchronizer  22 , so as to achieve that the individual support members  11  at the left and right sides of the support assembly  1  can move leftwards or rightwards synchronously relative to the middle support member  11 . In this embodiment, the middle support member  11  may be the middlemost support member  11 . 
     In some embodiments, the support assembly  1  includes a first support member  111  located on the outermost side, a second support member  112  adjacent to the first support member  111 , a third support member  113  adjacent to the second support member  112 , and a fourth support member  114  located at middle. The second sliding seat  233  is fixed on the first support member  111 , the first sliding seat  21  is fixed on the second support member  112 , the second fixed seat  231  is fixed on the third support member  113 , the fourth support member  114  is provided with a first fixed seat  115 , and the first fixed seat  115  is hinged with the other end of the synchronizer  22 . 
     Specifically, as shown in  FIG.  3   , the support members  11  from left to right are the first support member  111 , the second support member  112 , the third support member  113 , the fourth support member  114 , the third support member  113 , the second support member  112  and the first support member  111 , respectively. It may be understood that the first support members  111  at the left and right sides are symmetrical in the left-right direction relative to the fourth support member  114  at middle. Similarly, the second support members  112  at the left and right sides and the third support members  113  at the left and right sides may be arranged in the same way. Two second sliding seats  233  are fixed on the two first support members  111  on the two sides, respectively, and two first sliding seats  21  are fixed on the two second support members  112  on the two sides, respectively. Two second fixed seats  231  are fixed on the two third support members  113  on the two sides, respectively, and the first fixed seat  115  is fixed on the fourth support member  114 . 
     For example, taking the synchronizer  22  and the swing arm  232  at one side as an example, one end of the synchronizer  22  is hinged with the first fixed seat  115  on the fourth support member  114 , and the other end of the synchronizer  22  is slidably connected with the first sliding seat  21  on the second support member  112 ; one end of the swing arm  232  is hinged with the second fixed seat  231  on the third support member  113 , and the other end of the swing arm  232  is slidably connected with the second sliding seat  233  on the first support member  111 . The synchronizers  22  may drive the second support members  112  and the third support members  113  at the left and right sides to rotate synchronously relative to the fourth support member  114 , and the swing arm  232  connects the first support member  111  with the third support member  113 . When the second support members  112  and the third support members  113  at the left and right sides rotate synchronously relative to the fourth support member  114 , and the first support member  111  and the third support member  113  keep linked, so as to achieve the synchronous rotation of the support members  11  at the left and right sides relative to the fourth support member  114 . 
     In some embodiments, the synchronizer  22  is connected to the first fixed seat  115  at a same height as the synchronizer  22  is connected to the first sliding seat  21  in the up-down direction, and the swing arm  232  is connected to the second fixed seat  231  at a same height as the swing arm  232  is connected to the second sliding seat  233  in the up-down direction. In this embodiment, the first fixed seat  115  and the second fixed seat  231  may ensure that when the flexible screen is unfolded, the synchronizer  22  and the swing arm  232  remain horizontal in the left-right direction, so as to provide a stable support force for the flexible screen in an unfolded state. In addition, the synchronizer  22  and the swing arm  232  can also provide a stable support force for the flexible screen in a folded state. 
     In some embodiments, the synchronizer  22  includes an engaging portion  221 , a first leading portion  222  and a first hinged portion  223 , and the engaging portions  221  on different synchronizers  22  are engaged with each other. The first leading portion  222  extends from the engaging portion  221  along the width direction of the support member  11 , the first sliding seat  21  is provided with a first slot  212 , the first leading portion  222  is movably inserted in the first slot  212 , the first hinged portion  223  extends from the engaging portion  221  along the length direction of the support member  11 , and the first hinged portion  223  is hinged with the first fixed seat  115 . 
     In some embodiments, as shown in  FIG.  3   , the engaging portion  221  is a gear structure, and the gear structures on different synchronizers  22  at the two sides are engaged with each other to maintain the absolute synchronization of the individual support members  11  at the left and right sides of the support assembly  1 . The first hinged portion  223  extends from the engaging portion  221  in the front-rear direction, and the first hinged portion  223  is hinged with a front end and a rear end of the first fixed seat  115 . For example, the first hinged portion  223  is a rod pin, the first fixed seat  115  and the engaging portion  221  have a pin hole, and the rod pin passes through the pin holes in the first fixed seat  115  and the engaging portion  221 , respectively, so as to achieve the hinged connection between the synchronizer  22  and the first fixed seat  115 . The hinged connection between the synchronizer  22  and the first fixed seat  115  in this embodiment also may be achieved in other ways, which will not be listed herein. 
     The first leading portion  222  extends from the engaging portion  221  along the left-right direction of the support member  11 . The first sliding seat  21  is provided with the first slot  212 . The first leading portion  222  is movably inserted in the first slot  212 . The first slot  212  may limit the first leading portion  222 , such that the first leading portion  222  moves linearly in the first sliding seat  21  along the first slot  212 , and is movably inserted in the first sliding seat  21 . 
     In some embodiments, the swing arm  232  includes a second hinged portion  2321  and a second leading portion  2322 . Two ends of the second hinged portion  2321  in the length direction of the support member  11  are hinged with the second fixed seat  231 . One end of the second leading portion  2322  is connected with a middle part of the second hinged portion  2321 , the second sliding seat  233  is provided with a second slot  2332 , and the other end of the second leading portion  2322  is movably inserted in the second slot  2332 . 
     Specifically, as shown in  FIGS.  1  and  3   , a front end and a rear end of the second hinged portion  2321  are hinged with the second fixed seat  231 . In some embodiments, the second fixed seat  231  includes a second body  2311  and a second support portion  2312 . The second support portion  2312  is located on a side of the second body  2311  in the width direction of the support member  11  and faces towards the second sliding seat  233 . The second hinged portion  2321  may be understood as a shaft pin, one end of the second leading portion  2322  is connected with a middle part of the shaft pin, the second fixed seat  231  is provided with shaft holes, and two ends of the shaft pin pass through the shaft holes in the second fixed seat  231 , respectively, so as to achieve the hinged connection between the second leading portion  2322  and the second fixed seat  231 . The other end of the second leading portion  2322  is movably inserted in the second slot  2332 , such that the folding and unfolding of the hinge component  100  can be achieved by the linear movement of the second leading portion  2322  in the second sliding seat  233  along the second slot  2332 . 
     In some embodiments, the first fixed seat  115  includes two first support portions  1151  opposite to and spaced apart from each other, the first hinged portion  223  is hinged with the first support portion  1151 , and the engaging portion  221  is located between the two first support portions  1151 . 
     It should be noted that the first fixed seat  115  includes two first support portions  1151 , and the synchronizers  22  on the two sides need to be hinged with the first fixed seat  115 , respectively, such that the space occupied by the linkage assembly  2  is small as a whole, which is conducive to the lightweight structure stacking of the whole machine and the avoidance of other components in space. 
     In some embodiments, the first sliding seat  21  includes a first recessed portion  211  at a side facing towards the first fixed seat  115 ; and/or, the second sliding seat  233  includes a second recessed portion  2331  at a side facing towards the second fixed seat  231 . 
     Specifically, as shown in  FIG.  1   , the first recessed portion  211  is at the side of the first sliding seat  21  facing towards the first fixed seat  115 , and the second recessed portion  2331  is at the side of the second sliding seat  233  facing towards the second fixed seat  231 . The first recessed portion  211  and the second recessed portion  2331  prevent the first fixed seat  115  and the second fixed seat  231  from limiting the first sliding seat  21  and the second sliding seat  233  during the bending of the hinge component  100 , to avoid components in space. 
     The present disclosure also provides a foldable screen assembly, including a flexible screen and the hinge component  100  according to any one of the above embodiments, and the flexible screen is on the hinge component  100  and covers the hinge component  100 . 
     The present disclosure also provides a foldable terminal device, including the hinge component  100  according to any one of the above embodiments or the above foldable screen assembly. 
     The hinge component  100 , the foldable screen assembly and the foldable terminal device in the present disclosure have a large number of support members  11  to refine the support fineness, so as to effectively fit with and fully support the screen, thus overcoming the technical defects of wrinkles and deformation due to pulling during the folding of the screen in the related art. Moreover, the occupied space is small as a whole, which is convenient to the lightweight structure stacking of the whole machine. 
     In the descriptions of the embodiments of the present disclosure, it is to be understood that, terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “axial”, “radial” and “circumferential” should be construed to refer to the orientation or position as shown in the accompanying drawings. These relative terms are merely for convenience of descriptions and do not indicate or imply that the device or element referred to should have a particular orientation, or should be constructed or operated in a particular orientation, and thus cannot be construed as a limit to the present disclosure. 
     In addition, terms such as “first” and “second” are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features. Thus, the feature defined by “first” and “second” may comprise one or more of this feature. In the description of the present disclosure, “a plurality of” means two or more than two, unless specified otherwise. 
     In the present disclosure, it should be noted that, unless specified otherwise, terms “mounted”, “coupled”, “connected” and “fixed” should be understood broadly, for example, may be fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections or intercommunications; may also be direct connections or indirect connections via intervening structures; may also be inner communications or interactions of two elements, which may be understood by those skilled in the related art according to specific situations. 
     In the descriptions of the present disclosure, it should be noted that, unless otherwise expressly specified and limited, the first feature “on” or “under” the second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature “over”, “above” and “on” the second feature may be that the first feature is directly above or obliquely above the second feature, or merely be that the first feature has a level higher than the second feature. The first feature “beneath”, “below” and “under” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely be that the first feature has a level less than the second feature. 
     Reference throughout this specification to terms “an embodiment”, “some embodiments”, “an example”, “a specific example” or “some examples” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, exemplary descriptions of aforesaid terms are not necessarily referring to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, in the case of non-contradiction, those skilled in the art may combine and group the different embodiments or examples described in this specification and the features of the different embodiments or examples. 
     Although explanatory embodiments have been illustrated and described, it would be appreciated by those skilled in the art that the above embodiments are exemplary and cannot be construed to limit the present disclosure, and changes, modifications, alternatives and varieties can be made in the embodiments by those skilled in the art without departing from scope of the present disclosure.