CN110594547A - Folding hinge and folding display device - Google Patents

Abstract

A folding hinge, comprising several hinged hinges at free ends and fixed and foldable fixing devices respectively fixed to the hinges, the fixing device includes a fixed female seat and a fixed male seat, and each hinge corresponds to a fixed The female seat or a fixed male seat, the fixed male seat and the fixed female seat are connected to each other and can be rotated, and the fixed male seat and the fixed female seat are connected to the hinge at intervals; the application also includes a folding display device .

Description

Folding hinge and folding display device

technical field

The present application relates to the field of communication electronics, in particular to a folding hinge and a folding display device.

Background technique

With the development of folding screen technology, folding screen mobile phones have become a hot technology. Although the folding screen can be bent, it still cannot be bent 180 degrees, and the bent part still needs to maintain a certain R angle, otherwise the screen will be damaged. The existing folding methods are divided into inner folding and outer folding, that is, the screen is folded inside or outside, such as the Mate X released by Huawei, which is outer folding, but the problem of outer folding is that the screen is exposed and easily scratched by hard objects Injury, and the folding screen is relatively fragile.

Regardless of outward or inward folding, the problem to be solved is how to ensure that when the folding screen is bent, how does the bending mechanism adapt to the R-angle arc required by the bending part of the screen? At this time, there will be a slight The shortening of the distance will cause a slight extension of the distance outside the folding screen. At this time, the parts close to the folding screen must keep changing synchronously, otherwise the screen will be crushed. And ensure that there is support on the back of the folding screen, otherwise the suspended screen will cause damage when pressed by fingers. Patent application No. 201920305522.0 of the People's Republic of China discloses a folding display device. The folding boards disclosed by it are long in length and fixed to each other by two ends. When folding, it is easy to warp and cannot be maintained. leveling problem.

Contents of the invention

In view of this, it is necessary to provide a folding hinge and a folding display device. When the folding hinge realizes folding, the flatness of the folding can be realized.

In order to solve the above-mentioned technical problems, the application provides a folding hinge, which includes several hinged hinges at the free ends and fixed and foldable fixing devices respectively fixed to the hinged bars. Male seat, each hinge bar corresponds to a fixed female seat or a fixed male seat, the fixed male seat and the fixed female seat are connected to each other and can rotate, and the fixed male seat and the fixed female seat are connected to the hinge bar at intervals .

Preferably, the folding hinge comprises at least one set of fixing means located between the two free ends of the hinge.

Preferably, the folding hinge includes at least two sets of fixing devices located between the two free ends of the hinge.

Preferably, each hinge bar protrudes from an inner surface where the fixing device is assembled, and a protrusion is formed on the protrusion, and a screw hole is provided on the protrusion.

Preferably, both the fixed female seat and the fixed male seat include a seat base, a lower avoidance part opened at the base of the seat base to accommodate the protrusion, and a lower avoidance part that passes through the seat base and communicates with the lower avoidance part. The screw hole of the position part, the fixed female seat also includes a lower limit part, an upper limit part and an arc-shaped groove between the upper and lower limit parts respectively extending from the two ends of the seat base in the longitudinal direction. The fixed male seat also includes arc blocks extending from both longitudinal ends of the seat base and rotating in conjunction with the arc grooves.

Preferably, the arc-shaped grooves on the longitudinal sides of the fixed female seat and the arc-shaped blocks on the longitudinal sides of the fixed male seat are formed by extending in reverse in the transverse direction; the fixed male seat or the fixed female seat assembled on the outermost hinge bar Only one arc block or arc groove is arranged on the seat.

Preferably, the top of the base of the fixed male seat or the fixed female seat is provided with an upper avoidance part, and the fixed female seat and the fixed male seat pass through the screw holes on the base through bolts and are screwed together. The nuts of the bolts are accommodated in the upper escape parts.

Preferably, the hinge bar includes a main shaft, a plurality of bar-shaped bodies arranged on both lateral sides of the main shaft, and a rotating plate located outside the bar-shaped body.

Preferably, the thickness of the main shaft is greater than that of the bar and/or the rotating plate, the main shaft includes a shaft body and a fixing groove opened on the shaft body, the bottom of the fixing groove forms a connecting part, The bump is arranged on the connection part.

Preferably, one side of the fixing groove is a shaft body, and the other side forms a first partition, and a fixing hole is formed at a position corresponding to the shaft body and the first partition part, and the folding hinge also includes a The reinforcing rod in the fixing hole mentioned above.

In order to solve the above technical problems, the present application also provides a folding display device, including the aforementioned folding hinge, and the folding display device also includes a synchronous mechanism assembled on the folding hinge and a distance-changing mechanism hinged on the folding hinge. device.

The folding hinge of the present application sets at least one set of fixing devices that fix and fold the hinges at the middle position of the hinges, and the fixing devices realize the mutual rotation of the fixed female seat and the fixed male seat to realize the adjustment of several hinges. The flatness at the middle position avoids the problem of unevenness caused by the inability to maintain the relative position between the hinge bars.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application.

Figure 1 is a three-dimensional unfolded view of the foldable display device of the present application;

Fig. 2 is a three-dimensional unfolded view of another angle of the folding display device of the present application;

Fig. 3 is a three-dimensional unfolded view and a partial enlarged view of the hinge bar of the folding hinge of the present application;

Fig. 4 is a perspective view and a partial enlarged view of the main shaft of the hinge bar of the folding hinge of the present application;

Figure 5 is an expanded view of the fixing device of the folding hinge of the present application;

Fig. 6 is a perspective view of the first fixing part of the fixing device of the folding hinge of the present application;

Fig. 7 is a perspective view of the second fixing part of the fixing device of the folding hinge of the present application;

Fig. 8 is a perspective view and a partial enlarged view of the folding hinge of the present application;

FIG. 9 is an exploded perspective view of the foldable display device of the present application;

FIG. 10 is an exploded perspective view of the distance changing device of the foldable display device of the present application;

Fig. 11 is a perspective view of the rotating plate of the distance changing device of the foldable display device of the present application;

Fig. 12 is a perspective view from another angle of the rotating plate of the distance changing device of the foldable display device of the present application;

Fig. 13 is a perspective view of the slider of the distance changing device of the folding display device of the present application;

Fig. 14 is a perspective view of another angle of the slider of the distance changing device of the foldable display device of the present application;

Fig. 15 is a perspective view of the connecting plate of the distance changing device of the foldable display device of the present application;

Fig. 16 is a perspective view of the foldable display device of the present application in a folded state and a partially enlarged view thereof;

FIG. 17 is a perspective view and a partially enlarged view of the foldable display device of the present application with parts removed when the foldable display device is in a folded state.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Focusing on Fig. 1 and Fig. 2, the folding display device of the present application includes a folding hinge, a synchronization mechanism 30 assembled on the folding hinge, and a distance changing device 40 hinged on the folding hinge.

Please continue to refer to FIG. 1 to FIG. 8 and FIG. 16 , the folding hinge includes a plurality of hinge bars 10 with both ends hinged to each other, a fixing device 20 for fixing the plurality of hinge bars 10 and a reinforcing rod 15 .

The hinge bar 10 includes a main shaft 11 in the middle, at least one strip 12 hinged on both sides of the main shaft 11 and a rotating plate 13 hinged on the outside of the strip 12 .

The main shaft 11 includes a shaft body 111 , a fixed groove 112 recessed on both sides of the shaft body 111 , a gear groove 114 , a damping groove 115 and a first groove between the fixed groove 112 and the gear groove 114 . The partition part 117 , the second partition part 118 located between the gear groove 114 and the damping groove 115 , and the third partition part 119 located outside the damping groove 115 .

The inner surface of the fixing groove 112 of the main shaft 11 is in the same horizontal plane as the inner surface of the strip body 1 and the rotating plate 13, and the hinge bars 10 are respectively convex in the transverse direction of the position where the fixing groove 112 is located. A protruding block 101 is formed, and a screw hole 102 is provided on the protruding block 101 . The main shaft 11 , the bar 12 and the protrusion 101 on the rotating plate 13 are on the same straight line in the transverse direction.

Focusing on Fig. 2 and Fig. 16, the free end of the main shaft 11 protrudes outward to form a hinged part 127, and the lateral sides of the hinged part 127 are provided with hinged grooves 128, and the strip-shaped body 12 of the main shaft 11 The lateral sides of the free end of the rotating plate 13 are respectively provided with hinged protrusions 129 and hinged grooves 135 hinged in the hinged groove 128, and the free end of the rotating plate 13 is provided with hinged grooves 135 hinged in the strip 12. of hinged protrusions. The hinged slots 128, 135 are hinged to the hinged protrusion 129 via a peg (not labeled). Two strips 12 and a rotating plate 13 are respectively hinged on both sides of the main shaft 11 in sequence. The hinge structure design of the free end of the hinge bar 10 is described in detail in the patent application CN201920305522.0, and will not be repeated here.

The fixing device 20 includes a fixed female seat 21 and a fixed male seat 22 cooperating with the fixed female seat 21 to rotate. The fixed female seat 21 and the fixed male seat 22 both include a base 211, a lower avoidance portion 212 opened at the bottom of the base 211 to accommodate the protrusion 101, and a lower avoidance portion 212 opened at the top of the base 211. The upper escape portion 213 and the screw hole 214 passes through the base 211 and communicates with the upper and lower escape portions 212 , 213 . The two ends of the seat base 211 of the fixed female seat 21 are respectively extended to form a lower limit portion 215, an upper limit portion 216 and an arc-shaped groove 217 between the upper and lower limit portions 215, 216. The upper and lower limit portions 215, 216 at the longitudinal ends of the seat 21 extend in opposite directions in the transverse direction, that is, the arc-shaped grooves 217 at the longitudinal ends of the fixed female seat 21 extend in opposite directions and are arranged in point symmetry. The fixed male seat 22 also includes arc-shaped blocks 219 extending from both longitudinal ends of the seat base 211, the arc-shaped blocks 219 are matched with the arc-shaped grooves 217, and the fixed male seat 22 is longitudinally formed on two ends. The arc-shaped blocks 219 at the end extend in opposite directions in the transverse direction, and are arranged in point symmetry. The arc block 219 is snapped into the arc slot 217 and can rotate in the arc slot 217 .

The fixed female seat 21 and the fixed male seat 22 of the fixing device 20 are screwed on the protrusion 101 of the hinge bar 10 through bolts or screws (not shown), and the protrusion 101 fits into the lower avoidance position. In the portion 212 , the bolt passes through the screw hole 214 and is locked in the screw hole 102 on the protrusion 101 , and the nut part of the bolt is accommodated in the upper escape portion 213 . A fixed female seat 21 is provided on the bump 101 of the main shaft 11, and a fixed male seat 22 that cooperates with the fixed female seat 21 is provided on the bar 12 adjacent to the main shaft 11, and so on. A fixed female seat 21 or a fixed male seat 22 is fixed on the rotating plate 13, but the fixed female seat 21 or the fixed male seat 22 fixed on the rotating plate 13 only needs to be provided with an arc-shaped groove 217 or a The arc block 219 gets final product.

Focusing on Fig. 4 and Fig. 8 , after the fixing groove 112 of the main shaft 11 is recessed, a connecting portion 113 is formed at the bottom of the fixing groove 112, and the inner surface of the connecting portion 113 is connected to the strip 12. And the inner surface of the rotating plate 13 is on the same horizontal plane when in the unfolded state. The thickness of the connecting portion 113 is relatively thin, but the strength required by the main shaft 11 is relatively large, and the strength of the connecting portion 113 is not enough to support it. Therefore, the shaft body 111 on both sides of the fixing groove 112 and the A fixing hole 120 is provided at the corresponding position of the first partition part 117, and a reinforcing rod 15 is inserted above the fixing groove 112, and both ends of the reinforcing rod 15 are fixed in the fixing hole 120, and the The reinforcing rod 15 is located above the fixing device 20 .

The outer surface of the folding hinge is folded outward by bonding a folding screen with a folding plate, and the folding plate is fixed on the distance changing device 40 .

The folding hinge of the present application is provided with at least one set of fixing devices 20 for fixing the main shaft 11, the strip body 12 and the rotating plate 13 at the middle position, and the fixing device 20 passes through the connection between the fixed female seat 21 and the fixed male seat 22. Rotate each other to achieve the flatness of the middle position of the main shaft 11, the bar 12 and the rotating plate 13, and avoid the problem that the main shaft 11, the bar 12 and the rotating plate 13 of the folding hinge cannot maintain the relative position and produce unevenness .

Referring to Fig. 1, Fig. 2, Fig. 4, Fig. 9, and Fig. 10, the synchronous mechanism 30 of the present application is assembled on the main shaft 11, and the synchronous mechanism 30 includes at least one pair of rotating shafts 31 and is fixed on the A pair of gears 35 on the rotating shaft 31.

The first and second partitions 117, 118 at the longitudinal ends of the gear groove 114 of the main shaft 11 are respectively provided with a pair of horizontally arranged shaft holes 121 in the transverse direction, and the lateral sides of the gear groove 114 are provided with coatings. The protective portion 122 on the lateral side of the gear groove 114 is provided with notches 1141 for connecting the distance changing device 40 on both lateral sides of the gear groove 114 close to the first partition portion 117 .

The pair of rotating shafts 31 are sheathed in the pair of shaft holes 121 respectively. A pair of gears 35 are fixed on the pair of rotating shafts 31 and located in the gear groove 114 . The pair of gears 35 engage with each other. When the pair of rotating shafts 31 are rotated by the distance changing device 40, the gears move with the relative movement of the rotating shafts 31, so that the pair of rotating shafts 31 can realize the synchronization of the rotation range and avoid the rotation range of both sides of the folding screen. Inconsistent and damage the folding screen.

The folded inner surface of the longitudinal free end of the main shaft 11 is cut to form a notch 125, and the corresponding position of the third partition 119 penetrates to form a part of the shaft hole 121, that is, the shaft hole 121 runs through the third shaft hole 121 in the longitudinal direction. The partition 119 , the second partition 118 , regardless of the first partition 117 . The pair of shaft holes 121 are respectively on the same straight line. The second blocking portion 118 protrudes from one side of the damping groove 115 to form a resisting portion 123 , the shaft hole 121 is at least partially located and passes through the resisting portion 123 , and the second blocking portion 118 is positioned on the damping groove 115 . A rotation hole 124 is formed on one side of the groove 115 and on the outer edge of the resisting portion 123 . A pair of arc-shaped grooves 126 are respectively formed under the notch portion 125 corresponding to the shaft hole 121 . The resisting portion 123 may also be formed by longitudinally extending from the third partition portion 119 on a side of the damping groove 115 .

The damping groove 115 is provided with an outer spring 32 sleeved on the rotating shaft 31, a first damping block 33 sleeved on the outside of the rotating shaft 31, and a first damping block 33 fixed on the rotating shaft 31 and connected to the first damping block 33. Cooperating second damping block 34. The spring 32 is clamped between the third partition portion 119 and the first damping block 33 , and the rear end of the second damping block 34 abuts against the resisting portion 123 . The first damping block 33 includes a main body (not shown) connected as one, through holes (not shown) opened on both lateral sides of the main body for the two rotating shafts 31 to pass through, and opened in the The concave-convex matching structure on the longitudinal side of the through hole, that is, the first damping block 33 is integrally sleeved on the rotating shaft 31 . There are two second damping blocks 34, which are respectively fixed on the rotating shaft 31 and rotate with the rotation of the rotating shaft 31. There is a corresponding concave-convex matching structure, through the elastic pressure of the spring 32, the concave-convex matching structure of the first damping block 33 and the second damping block 34 cooperate with each other to generate staged resistance or power assistance, and realize the folding screen Hovering at different positions during the folding process produces a better user experience effect.

Please refer to Fig. 4, Fig. 9 to Fig. 15, the distance changing device 40 includes a rotating base 41, a driving rod 46 that can rotate in the rotating hole 124 of the main shaft 11, placed in the rotating base 41 and The transmission member 47 driven by the driving rod 46 , the connecting base 43 movable relative to the rotating base 41 , and the linkage rod 44 that enables the transmission member 47 to drive the connecting base 43 to move.

10 to 12, the rotating base 41 includes a base body 411, a rotating part 412 extending from one lateral side of the base body 411 and fixed to the rotating shaft 31, and a recess formed in the base body. 411 and a matching portion 415 extending away from the rotating portion 412 and a first engaging portion 416 formed on the back of the base body 411 opposite to the matching portion 415 . The matching portion 415 is partially recessed on the base body 411 and partially extended from the base body 411 . The matching part 415 includes a recessed receiving part 421, a limiting part 422 formed by extending upward from the longitudinal sides of the receiving part 421 and then relatively bent and extended, and formed outside the longitudinal sides of the receiving part 421. The matching flange 423 on the edge, the communicating hole 424 passing through the accommodating part 421, the first rotating fitting part 425 passing through the matching part 415 and located at the longitudinal end of the communicating hole 424, set on a limiting part 422 The state control slot 426 and the post 427 on the back of the base 411 are provided. The communicating hole 424 includes a narrow portion 4242 on one side of the first rotating fitting portion 425 and a wide portion 4241 on a side away from the first rotating fitting portion 425, the width of the wide portion 4241 is larger than the narrow portion 4242. The width of portion 4242. The state control slot 426 includes an expanded state slot 4261 , a closed state slot 4262 and an isolation protrusion 4263 located between the expanded state slot 4261 and the closed state slot 4262 .

The driving rod 46 includes a shaft end 461 rotatable around the rotating hole 124 and a driving end 462 matched with the transmission member 47 . The shaft end 461 includes a shaft structure extending toward one side of the longitudinal direction and inserted into the rotation hole 124. The shaft end 461 is located outside the resisting portion 123. The shaft end 461 is connected to the second damper. There is a gap between the blocks 34 , and the second damping block 34 will not interfere with the rotation of the shaft end 461 . The driving end 462 includes a columnar structure formed at the end.

The linkage rod 44 includes first, second, and third rotating branches 441 , 442 , 443 arranged in sequence, and the first and third rotating branches 441 , 443 are respectively located at two ends of the second rotating branch 442 . The first rotation branch 441 is fixed on the first rotation matching portion 425 of the rotation seat 41 by a rivet.

The transmission member 47 includes a plate body portion 471, a buckle hole 472 provided on the plate body portion 471 and having a first opening 473 on the lateral outer side, and a buckle hole 472 disposed on the plate body portion 471 away from the buckle hole. 472, the third rotation fitting part 474 riveted with the third rotation branch part 443 by a rivet at one end, the avoidance part 475 provided on one side of the third rotation fitting part 474 and the buckle hole 472 and the said buckle hole 472 The installation cavity 477 between the third rotating fitting parts 474 . The installation cavity 477 is provided with a second opening 476 on the longitudinal outer side.

The connecting seat 43 includes a main body 431 , a matching groove 432 extending upward from both longitudinal sides of the main body 431 and then vertically oppositely bent and extended, a fixing hole 433 extending from the longitudinal outer side of the matching groove 432 , The rubber sleeve 434 sleeved in the matching groove 432, the rubber sleeve 434 is attached to the matching groove 432 to form a track groove 435, the riveting column 436 set on the inner surface of the main body part 431, and the The second rotating fitting part 438 at the rear end of the inner surface of the main body part 431 and the flat spring 437 with one end fixed on the riveting post 436 . The other end of the flat spring 437 is fixed on the cylinder 427 of the rotating plate 41 , and there are at least one pair of flat springs 437 . The second rotating branch 442 of the linkage rod 44 is limited on the second rotating fitting part 438 of the connecting seat 43 by a rivet, and the first, second and third rotating branches 441, 442, 443 can respectively rotate around The first rotation matching part 425 , the second rotation matching part 438 and the third rotation matching part 474 rotate.

A state control member 45 is installed in the installation cavity 477 of the transmission member 47, and the state control member 45 includes a base portion 451 placed in the installation cavity 477, and extends out of the installation cavity 477 from the base portion 451. The resisting end portion 453 outside the second opening 476 and the elastic member 452 are clamped between one end of the base portion 451 and the inner wall of the installation cavity 477 . The elastic member 452 is positioned by a positioning column (not shown) provided on the inner wall of the installation cavity 477, and the elastic member 452 provides elastic force to the state control member 45, so that the abutting end 453 Maintaining the outward supporting force, the abutting end 453 is switched between the expanded state groove 4261 and the closed state groove 4262 of the state control groove 426 of the rotating seat 41 to realize the positioning when switching between the expanded state and the closed state function to prevent excessive opening or closing operations.

When assembling the distance changing device 40, the shaft end 461 of the driving rod 46 is inserted into the rotating hole 124 outside the resisting portion 123; In the arc groove 126 of the gear groove 114 and the cutout portion 125 and the gear groove 114, insert the rotating shaft 31 from one end of the cutout portion 125 into the hole structure on the rotating portion 412 and the first The shaft hole 121 on the three partitions 119 extends into the damping groove 115. At this time, the spring 32 and the first and second damping blocks 33, 34 are respectively set on the outside of the rotating shaft 31. The second damping block 34 is held against the resisting portion 123; continue to push the rotating shaft 31 so that the rotating shaft 31 passes through the shaft hole 121 on the second partition portion 118 and extends into the gear groove 114, at the same time, Insert a pair of gears 35 and a rotating part 412 into the rotating shaft 31 , and continue pushing the rotating shaft to insert into the shaft hole 121 on the first partition part 117 .

The rotating plate 13 includes a rotating plate base 131, a widening portion 132 extending from both longitudinal sides of the rotating plate base 131 to the transverse direction, longitudinal ends 133 formed at both longitudinal ends of the rotating plate base 131 and formed on The second engaging portion 134 on the outer surface of the longitudinal end portion 133 cooperates with the first engaging portion 416 . When the rotating base 41 is assembled on the main shaft 11 , the first engaging portion 416 and the second engaging portion 134 cooperate with each other and can realize position limitation and relative movement when the rotating base 41 rotates.

Before assembling the rotating base 41 on the main shaft 11, the distance changing device 40 needs to be assembled, and the distance changing device is assembled as follows:

The other end of the flat spring 437 fixed on the riveting column 436 of the connecting seat 43 is fixed on the cylinder 427 on the back of the rotating seat 41, and the second rotating branch 442 of the linkage rod 44 is fixed on the rotating base 442. The second rotation fitting portion 438 of the connecting base 43 or the first rotation branch portion 441 is fixed on the first rotation fitting portion 425 of the rotation base 41 . The track groove 435 of the connecting seat 43 is set outside the matching flange 423 on both sides of the matching part of the rotating seat 41, and the track groove 435 is covered with a rubber sleeve 434 to make the cooperation between the two slide smoothly and avoid noise. produce.

The state control member 45 is fixed in the installation cavity 477 of the transmission member 47, and then the transmission member 47 is loaded into the accommodation portion 421 of the rotating base 41, and the two sides of the accommodation portion 421 The limit portion 422 restricts the position of the transmission member 47 in the longitudinal direction, and the abutment end portion 453 elastically fits with the state control groove 426; at this time, the third rotation branch 443 of the linkage rod 44 is fixed in rotation. on the third rotating matching portion 474 of the transmission member 47 . The first, second, and third rotating branches 441, 442, 443 and the first, second, and third rotating matching portions 425, 438, 474 may be a combination of holes and cylinder structures, or may be rivets Riveted in two hole structures.

The driving end 462 of the driving rod 46 is snapped into the buckling hole 472 of the transmission member 47 , and the driving rod 46 extends out along the first opening 473 on one side of the buckling hole 472 . The rotating portion 412 located in the gear slot 114 extends along the notch 1141 of the gear slot 114 .

The distance changing device 40 further includes a cover plate 48 , and the cover plate 48 is fixed above the accommodating portion 421 of the rotating base 41 by screws to fix the transmission member 47 on the rotating base 41 .

The operating principle of the distance changing device of the present application is as follows. When the connecting seat 43 is driven to rotate by the housing (such as a mobile phone case) to which it is connected, the rotating plate 13 drives the hinge bar 10 to rotate together. 13 and the rotating seat 41 relatively move through the first and second engaging parts 416, 134, and at the same time, the driving rod 46 rotates accordingly, and the driving end 462 of the driving rod 46 drives the transmission member 47 in the rotating The accommodating portion 421 of the seat 41 moves, so that the connecting rod 44 fixed on the transmission member 47 is rotated to drive the connecting seat 43 to move, and the movement of the connecting seat 43 can make the fixed on the connecting seat 43 The length of the casing changes, so as to adapt to the change in length of the folding screen due to bending.

During this process, the flat spring 437 provides the connection and elastic force between the connecting seat 43 and the rotating seat 41 . The flat spring 437 can also provide two states, cooperate with the state control member 45 and the state control groove 426 on the rotating seat 41 to realize positioning in two positions of unfolded state and folded state.

The above descriptions are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (11)

1. A folding hinge, characterized in that it comprises several hinged hinges at free ends and fixed and foldable fixing devices respectively fixed with the hinges, the fixing device includes a fixed female seat and a fixed male seat, each The root hinge bar corresponds to a fixed female seat or a fixed male seat, the fixed male seat and the fixed female seat are connected to each other and can rotate, and the fixed male seat and the fixed female seat are connected to the hinge bar at intervals. 2. The folding hinge according to claim 1, characterized in that, the folding hinge comprises at least one set of fixing devices located between the two free ends of the hinge. 3. The folding hinge according to claim 1, characterized in that, the folding hinge comprises at least two sets of fixing devices located between the two free ends of the hinge. 4 . The folding hinge according to claim 1 , wherein each hinge bar protrudes from an inner surface where the fixing device is assembled, and a protrusion is formed on the protrusion, and a screw hole is provided on the protrusion. 5. The folding hinge according to claim 4, characterized in that, both the fixed female seat and the fixed male seat include a seat base, and a lower avoidance portion opened on the seat base to accommodate the protrusion And the screw hole that runs through the base and communicates with the lower avoidance part, and the fixed female seat also includes a lower limit part, an upper limit part and a lower limit part extending from the two ends of the base in the longitudinal direction respectively, and the upper limit part and the upper limit part. , an arc-shaped groove between the lower limiting parts, and the fixed male seat further includes arc-shaped blocks extending from both longitudinal ends of the seat base to rotate in conjunction with the arc-shaped groove. 6. The folding hinge according to claim 5, characterized in that, the arc-shaped grooves on the longitudinal sides of the fixed female seat and the arc-shaped blocks on the longitudinal sides of the fixed male seat are formed by reversely extending in the transverse direction; Only one arc-shaped block or arc-shaped groove is arranged on the fixed male seat or the fixed female seat assembled on the outermost hinge bar. 7. The folding hinge according to claim 6, characterized in that, the top of the base of the fixed male seat or the fixed female seat is provided with an upper avoidance part, and the fixed female seat and the fixed male seat are passed through by bolts. The screw holes on the base are screwed into the screw holes of the protrusions, and the nuts of the bolts are accommodated in the upper avoiding portion. 8. The folding hinge according to claim 5, characterized in that, the hinge bar comprises a main shaft, several strips respectively arranged on both lateral sides of the main shaft, and a rotating plate located outside the strips . 9. The folding hinge according to claim 8, wherein the thickness of the main shaft is greater than that of the strip and/or the rotating plate, and the main shaft includes a shaft body and a shaft set on the shaft body. The fixing groove, the bottom of the fixing groove forms a connection part, and the protrusion is arranged on the connection part. 10. The folding hinge according to claim 9, wherein one side of the fixing groove is a shaft body, and the other side forms a first partition, and the position corresponding to the shaft body and the first partition is A fixing hole is formed, and the folding hinge further includes a reinforcing rod inserted into the fixing hole. 11. A folding display device, characterized by comprising the folding hinge according to any one of claims 1-10, the folding display device further comprising a synchronization mechanism assembled on the folding hinge and hinged on the folding hinge. Folding pitch changer on hinges.