Hinge assembly for flexible folding screen and flexible folding screen having the same

Abstract

The present invention discloses a hinge assembly for a flexible folding screen and a flexible folding screen having the same. The hinge assembly for the flexible folding screen includes a base and a rotating assembly, the rotating assembly includes a slider fixing seat, a first slider, a second slider, a first connector, a second connector and an adjusting element, the slider fixing seat is fixed to the base, the first slider and the second slider can both slide along the slider fixing seat, the first connector is pivotally connected to the first slider and the first connector is used to connect the first middle frame of the flexible folding screen, the second connector is pivotally connected to the second slider and the second connector is used to connect the second middle frame of the flexible folding screen, and the adjusting element is at least used to drive the first slider and the second slider away from each other. According to the hinge assembly for a flexible folding screen of the present invention, the screen can be tensioned and straightened, thereby improving the crease of the flexible folding screen.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible folding screens, and in particular to a hinge assembly for a flexible folding screen and a flexible folding screen having the hinge assembly. Background Art

[0002] When the flexible folding screen is bent, the part above the neutral layer will be squeezed, and the part below the neutral layer will be stretched. After the user uses it for a period of time, the flexible folding screen material cannot be restored due to deformation, resulting in creases. With the update and iteration of flexible folding screen electronic products, flexible folding screens tend to be thinner and lighter, and the bending radius of flexible folding screens is getting smaller and smaller. The smaller the bending radius, the deeper the crease depth. In the short term, changing the screen material and stacking cannot completely improve the crease problem, so hinges are needed to assist in improving the crease problem. Summary of the invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present invention proposes a hinge assembly for a flexible folding screen, which can tighten and straighten the screen when the flexible folding screen is flattened, thereby improving the crease of the flexible folding screen.

[0004] The present invention also proposes a flexible folding screen having the above-mentioned hinge assembly.

[0005] According to an embodiment of the present invention, a hinge assembly for a flexible folding screen includes a base and a rotating assembly, the rotating assembly includes a slider fixing seat, a first slider, a second slider, a first connecting head, a second connecting head and an adjusting element, the slider fixing seat is fixed to the base, the first slider and the second slider can both slide along the slider fixing seat, the first connecting head is pivotally connected to the first slider and the first connecting head is used to connect to the first middle frame of the flexible folding screen, the second connecting head is pivotally connected to the second slider and the second connecting head is used to connect to the second middle frame of the flexible folding screen, and the adjusting element is at least used to drive the first slider and the second slider away from each other.

[0006] According to the hinge assembly for a flexible folding screen according to an embodiment of the present invention, when the flexible folding screen is flattened, the first slider and the second slider move away from each other, and the distance between the two middle frames can be fine-tuned to compensate for the change in screen length in the screen bending area during use, thereby tensioning and straightening the screen to keep the screen flat at all times, thereby improving the creases of the flexible folding screen.

[0007] According to some embodiments of the present invention, the adjusting element includes a wedge block, the wedge block has a first wedge surface and a second wedge surface arranged opposite to each other, the distance between the first wedge surface and the second wedge surface gradually narrows, the first sliding block has a first sliding groove, the first wedge surface stops at the groove side wall of the first sliding groove, the second sliding block has a second sliding groove, the second wedge surface stops at the groove side wall of the second sliding groove, the length of the groove side wall of the first sliding groove is greater than the length of the first wedge surface, and the length of the groove side wall of the second sliding groove is greater than the length of the second wedge surface.

[0008] According to some embodiments of the present invention, the adjusting element further comprises an adjusting screw, wherein the adjusting screw is threadedly connected to the wedge block, and when the adjusting screw rotates, it is suitable for driving the wedge block to move along the axial direction of the adjusting screw.

[0009] According to some embodiments of the present invention, the adjusting element has a first extreme position and a second extreme position. In the first extreme position, the distance between the first slider and the second slider is the shortest; in the second extreme position, the distance between the first slider and the second slider is the farthest.

[0010] According to some embodiments of the present invention, the wedge block has a symmetric plane, and the angle between the first wedge surface and the symmetric plane and the angle between the second wedge surface and the symmetric plane are both θ. In the first extreme position, the reserved gap between one end of the wedge block and one end of the first slide groove and the second slide groove is G. When moving from the first extreme position to the second extreme position, the total movement of the first slider and the second slider is 2*△G*Tanθ.

[0011] According to some embodiments of the present invention, a synchronous motion component is further included, and the synchronous motion component includes:

[0012] A gear seat, the gear seat is fixed to the base, and a first shaft and a second shaft are arranged in parallel on the gear seat;

[0013] A first gear connecting rod and a second gear connecting rod, wherein the first gear connecting rod is pivotally connected to the first shaft, and the second gear connecting rod is pivotally connected to the second shaft;

[0014] A first slide slot seat and a second slide slot seat, the first slide slot seat is slidably matched with the first gear connecting rod and the first slide slot seat is used to connect the first middle frame of the flexible folding screen, the second slide slot seat is slidably matched with the second gear connecting rod and the second slide slot seat is used to connect the second middle frame of the flexible folding screen.

[0015] According to some embodiments of the present invention, the first gear connecting rod comprises a first connecting rod gear, and the second gear connecting rod comprises a second connecting rod gear;

[0016] The co-moving component also includes: a first gear shaft group and a second gear shaft group, the first gear shaft group and the second gear shaft group are rotatably mounted on the gear seat, and the axes of the first gear shaft group and the second gear shaft group are parallel to the axes of the first shaft and the second shaft, the first gear shaft group includes a first group of first gears and a first group of second gears, the first group of first gears are meshed with the first connecting rod gear for transmission, and the first group of second gears are meshed with the second connecting rod gear for transmission, the second gear shaft group includes a second group of first gears and a second group of second gears, the second group of first gears are meshed with the first connecting rod gear for transmission, and the second group of second gears are meshed with the second connecting rod gear for transmission.

[0017] According to some embodiments of the present invention, the first gear connecting rod further comprises a first connecting rod cam, and the second gear connecting rod further comprises a second connecting rod cam;

[0018] The synchronous assembly also includes: a cam group and a spring, the cam group includes a cam seat and a first cam and a second cam formed on the cam seat, the first connecting rod cam is in contact with the first cam for transmission, and the second connecting rod cam is in contact with the second cam for transmission, the first cam and the second cam both include an automatic flattening section, an automatic closing section and a stable support section located between the automatic flattening section and the automatic closing section, the stable support section is closer to the corresponding connecting rod cam than the automatic flattening section and the automatic closing section, the first connecting rod cam and the second connecting rod cam have a raised section, and the spring is used to apply an elastic force to make the first cam abut against the raised section of the first connecting rod cam and the second cam abut against the raised section of the second connecting rod cam.

[0019] According to some embodiments of the present invention, the cam groups are divided into two groups, wherein one group of the cam groups is mounted on the first gear shaft group, and the other group of the cam groups is mounted on the second gear shaft group.

[0020] According to another aspect of an embodiment of the present invention, a flexible folding screen includes a screen, a first middle frame, a second middle frame and the above-mentioned hinge assembly, the first middle frame, the second middle frame and the hinge assembly are located on the back side of the screen, and the hinge assembly is located between the first middle frame and the second middle frame, the first connecting head is fixedly connected to the first middle frame, and the second connecting head is fixedly connected to the second middle frame.

[0021] The hinge assembly of the flexible folding screen can tighten and straighten the screen, thereby improving the crease of the flexible folding screen.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of an embodiment of a hinge assembly for a flexible folding screen;

[0024] Figure 2 is a schematic diagram of another embodiment of a hinge assembly for a flexible folding screen;

[0025] Figure 3 is an exploded view of a rotating assembly of a hinge assembly for a flexible folding screen;

[0026] Figure 4 is a schematic diagram of a rotating assembly of a hinge assembly for a flexible folding screen in a first position;

[0027] Figure 5 is a schematic diagram of a rotating assembly of a hinge assembly for a flexible folding screen in a second position;

[0028] Figure 6 is a schematic diagram of a first gear connecting rod of a hinge assembly for a flexible folding screen;

[0029] Figure 7 is a schematic diagram of a cam group of a hinge assembly for a flexible folding screen;

[0030] Figure 8 is a schematic diagram of a moving assembly of a hinge assembly for a flexible folding screen;

[0031] Fig. 9 It is an exploded view of a moving component of a hinge assembly for a flexible folding screen;

[0032] Fig.10 It is an exploded view of the hinge assembly for the flexible folding screen;

[0033] Fig.11 It is a schematic diagram of a flexible folding screen;

[0034] Fig.12 It is a schematic diagram of the hinge assembly for a flexible folding screen from closed to flattened.

[0035] Reference numerals:

[0036] Hinge assembly 100, base 1, slider fixing seat 11, first slider 12, second slider 13, first connector 14, first arc segment 141, second arc segment 142, second connector 15, third arc segment 151, fourth arc segment 152, first middle frame 2, second middle frame 3, groove 16, wedge block 17, first wedge surface 171, second wedge surface 172, first slide groove 173, second slide groove 174, adjusting screw 18, connecting rod 19, gear seat 4, first gear connecting rod 5, second gear connecting rod 6, first slide groove seat 51, second slide groove seat 61, first shaft 41, The second shaft 42, the slide seat raised shaft 43, the first connecting rod gear 52, the second connecting rod gear 62, the first connecting rod cam 53, the second connecting rod cam 63, the cam group 44, the spring 45, the cam seat 46, the first cam 461, the second cam 462, the stable support section 464, the automatic flattening section 465, the automatic closing section 466, the spring stop 47, the retaining spring 48, the fastening screw 49, the first gear shaft group 55, the first group first gear 56, the first group second gear 54, the second gear shaft group 65, the second group first gear 66, the second group second gear 64, the covering 7, and the screen 8. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Combine the following Figure 1-Figure 12 The hinge assembly 100 for a flexible folding screen according to an embodiment of the present invention is described in detail. The flexible folding screen includes a screen 8, and the hinge assembly 100 is used to tension and straighten the screen 8 to improve the crease of the screen 8. The hinge assembly 100 is located below the screen 8 to hide the hinge assembly 100, improve the appearance of the flexible folding screen, and prevent the hinge assembly 100 from easily hiding dirt when it is exposed.

[0042] Reference Figure 1-Figure 5 , Figure 9-10 As shown, the hinge assembly 100 for a flexible folding screen according to an embodiment of the present invention may include a base 1 and a rotating assembly.

[0043] Among them, the rotating assembly may include a slider fixing seat 11, a first slider 12, a second slider 13, a first connector 14, a second connector 15 and an adjusting element. The slider fixing seat 11 is fixed to the base 1. Optionally, the slider fixing seat 11 is provided with a threaded hole, and the slider fixing seat 11 is fixed to the covering member 7 of the base 1 by a fastening screw 49. The slider fixing seat 11 can also be fixed to the base 1 by welding, bonding or other fasteners. The first slider 12 and the second slider 13 can both slide along the slider fixing seat 11. Optionally, the first slider 12 and the second slider 13 are provided with a groove 16, and both ends of the slider fixing seat 11 are formed as slide rails, and the slide rails are located in the groove 16, and the first slider 12 and the second slider 13 can both move along the slide rails. In some examples, such as Figure 3-Figure 5As shown, two slider fixing seats 11 are provided, and the two slider fixing seats 11 are parallel. Two grooves 16 are provided corresponding to the first slider 12, and two grooves 16 are provided corresponding to the second slider 13. The provision of two slider fixing seats 11 can make the sliding of the first slider 12 and the second slider 13 more stable. The first connector 14 is pivotally connected to the first slider 12 and the first connector 14 is used to connect the first middle frame 2 of the flexible folding screen. The second connector 15 is pivotally connected to the second slider 13 and the second connector 15 is used to connect the second middle frame 3 of the flexible folding screen. The first middle frame 2 and the second middle frame 3 are located below the screen. In this way, the flexible folding screen is folded through the first connector 14 and the second connector 15. Optionally, the first connector 14 is provided with a first arc segment 141 and a second arc segment 142 on the side where the first connector 14 is connected to the first slider 12, two avoidance openings are provided at positions corresponding to the first arc segment 141 and the second arc segment 142, the first arc segment 141 and the second arc segment 142 are respectively engaged with the avoidance openings, and the first connector 14 is rotatably connected to the first slider 12 through the first arc segment 141 and the second arc segment 142. Similarly, the second connector 15 is provided with a third arc segment 151 and a fourth arc segment 152 on the side where the second connector 15 is connected to the second slider 13, avoidance openings are provided at positions corresponding to the third arc segment 151 and the fourth arc segment 152, the third arc segment 151 and the fourth arc segment 152 are respectively engaged with the avoidance openings, and the second connector 15 is rotatably connected to the second slider 13 through the third arc segment 151 and the fourth arc segment 152. The adjusting element is at least used to drive the first slider 12 and the second slider 13 away from each other. When the adjusting element drives the first slider 12 and the second slider 13 to move away from each other, the first connector 14 and the second connector 15 also move away from each other, thereby driving the first middle frame 2 and the second middle frame 3 to move away from each other, and when the flexible folding screen is flattened, the screen can be tensioned and straightened to improve the crease. Optionally, in some examples, the adjusting element can also be used to drive the first slider 12 and the second slider 13 to move closer to each other, and the first connector 14 and the second connector 15 also move closer to each other, thereby driving the first middle frame 2 and the second middle frame 3 to move closer to each other. The hinge assembly 100 is arranged at the bending area of ​​the screen, so that the screen can be folded or unfolded when the first connector 14 rotates around the first slider 12 and the second connector 15 rotates around the second slider 13. For example, when the outer ends of the first connector 14 and the second connector 15 rotate in a direction close to each other, the screen is folded; when the outer ends of the first connector 14 and the second connector 15 rotate in a direction away from each other, the screen is unfolded.

[0044] According to the hinge assembly 100 for a flexible folding screen according to an embodiment of the present invention, when the flexible folding screen is flattened, the first slider 12 and the second slider 13 move away from each other, and the distance between the first middle frame 2 and the second middle frame 3 can be fine-tuned to compensate for the change in screen length in the screen bending area during use, thereby tensioning and straightening the screen to ensure that the screen is in a straight state and improve the crease of the flexible folding screen.

[0045] In some embodiments of the present invention, reference Figure 3-Figure 5 As shown, the adjustment element may include a wedge block 17, and the wedge block 17 has a first wedge surface 171 and a second wedge surface 172 that are arranged opposite to each other, and the distance between the first wedge surface 171 and the second wedge surface 172 gradually narrows. Optionally, as shown in the figure, the wedge block 17 is a trapezoidal structure. The first slider 12 has a first slide groove 173, and the first wedge surface 171 stops at the groove side wall of the first slide groove 173. The second slider 13 has a second slide groove 174, and the second wedge surface 172 stops at the groove side wall of the second slide groove 174. Optionally, the first slide groove 173 and the second slide groove 174 can form a trapezoidal groove that can accommodate the wedge block 17. The length of the groove side wall of the first slide groove 173 is greater than the length of the first wedge surface 171, and the length of the groove side wall of the second slide groove 174 is greater than the length of the second wedge surface 172. In this way, the wedge block 17 can move in the first slide groove 173 and the second slide groove 174. When the wedge block 17 moves toward the narrower end (such as Figure 4 When the middle wedge block 17 moves to the right, the first slider 12 and the second slider 13 move away from each other, and the distance between the first middle frame 2 and the second middle frame 3 can be fine-tuned to compensate for the change in screen length in the screen bending area during use, thereby tensioning and straightening the screen to ensure that the screen is in a straight state and improve the crease of the flexible folding screen.

[0046] In some embodiments of the present invention, reference Figure 3-Figure 5 As shown, the adjusting element further includes an adjusting screw 18, which is threadedly connected to the wedge block 17. When the adjusting screw 18 rotates, it is suitable for driving the wedge block 17 to move along the axial direction of the adjusting screw 18. As the wedge block 17 moves, the distance between the first slider 12 and the second slider 13 changes. Figure 3-Figure 5 As shown, a connecting rod 19 is provided between the wedge block 17 and the adjusting screw 18. The connecting rod 19 is fixed on the narrower end of the wedge block 17. The adjusting screw 18 is screwed to the connecting rod 19 and fixed by a retaining spring 48, so as to avoid interference between the adjusting screw 18 and the slider fixing seat 11. When the adjusting screw 18 rotates and the wedge block 17 moves toward the adjusting screw 18 along the axis of the adjusting screw 18, the first slider 12 and the second slider 13 move away from each other. When the adjusting screw 18 rotates in the opposite direction and the wedge block 17 moves in the opposite direction along the axis of the adjusting screw 18, the first slider 12 and the second slider 13 move toward each other. Optionally, the adjusting screw 18 can be driven by a motor or manually rotated by a screwdriver.

[0047] In some embodiments of the present invention, reference Figure 4-Figure 5 As shown, the adjusting element has a first extreme position and a second extreme position. In the first extreme position, that is, Figure 4 In the position shown, the distance between the first slider 12 and the second slider 13 is the shortest, and the distance between the first middle frame 2 and the second middle frame 3 is also the shortest; in the second extreme position, that is, Figure 5 In the position shown, the distance between the first slider 12 and the second slider 13 is the farthest, and the distance between the first middle frame 2 and the second middle frame 3 is also the farthest, which can compensate for the change in the length of the screen during use of the screen bending area, thereby tensioning and straightening the screen to ensure that the screen is in a straight state and improve the crease of the flexible folding screen. Optionally, by rotating the adjustment screw 18, the adjustment element can be transformed from the first extreme position to the second extreme position; by rotating the adjustment screw 18 in the opposite direction, the adjustment element can be transformed from the second extreme position to the first extreme position.

[0048] In some embodiments of the present invention, reference Figure 4 As shown, the wedge block 17 has a symmetric plane, the angle between the first wedge surface 171 and the symmetric plane, and the angle between the second wedge surface 172 and the symmetric plane are both θ, the first wedge surface 171 and the second wedge surface 172 are symmetrically arranged along the symmetric plane, and the first slider 12 and the second slider 13 move the same distance. In the first limit position, the distance between the first slider 12 and the second slider 13 is the shortest, and the reserved gap between one end of the wedge block 17 and one end of the first slide groove 173 and the second slide groove 174 is G. Then, when moving from the first limit position to the second limit position, the movement amount of the first slider 12 and the second slider 13 is △G*Tanθ respectively, and the total movement amount of the first slider 12 and the second slider 13 is 2*△G*Tanθ. At this time, the total movement amount of the first middle frame 2 and the second middle frame 3 is 2*△G*Tanθ, and the change amount of the screen length is 2*△G*Tanθ. The values ​​of G and θ can be determined by the change amount of the length of the bending area of ​​the screen.

[0049] In some embodiments of the present invention, reference Figure 1-Figure 2 , Figure 6-Figure 11 As shown, the hinge assembly 100 for a flexible folding screen of an embodiment of the present invention may further include a synchronous assembly, which includes a gear seat 4, a first gear connecting rod 5, a second gear connecting rod 6, a first slide groove seat 51, and a second slide groove seat 61.

[0050] The gear seat 4 is fixed to the base 1. Optionally, the gear seat 4 and the base 1 are connected by screws or welded. The gear seat 4 is provided with a first shaft 41 and a second shaft 42 arranged in parallel. Figure 9-10 In the example, the first shaft 41 is composed of two sections located on both sides of the gear seat 4 , and the second shaft 42 is also composed of two sections located on both sides of the gear seat 4 .

[0051] The first gear connecting rod 5 is pivotally connected to the first shaft 41. Optionally, the first gear connecting rod 5 is provided with a shaft hole, through which the first gear connecting rod 5 is connected to the first shaft 41 and the first gear connecting rod 5 can rotate around the shaft. The second gear connecting rod 6 is pivotally connected to the second shaft 42. Optionally, the second gear connecting rod 6 is provided with a shaft hole, through which the second gear connecting rod 6 is connected to the second shaft 42 and the second gear connecting rod 6 can rotate around the shaft.

[0052] The first slide slot seat 51 is slidably matched with the first gear connecting rod 5 and the first slide slot seat 51 is used to connect the first middle frame 2 of the flexible folding screen, and the second slide slot seat 61 is slidably matched with the second gear connecting rod 6 and the second slide slot seat 61 is used to connect the second middle frame 3 of the flexible folding screen. Optionally, a connecting rod groove is provided at one end of the first gear connecting rod 5 away from the first shaft 41, and a connecting rod groove is provided at one end of the second gear connecting rod 6 away from the second shaft 42. Both sides of the first slide slot seat 51 and the second slide slot seat 61 are provided with a slide slot seat protruding shaft 43, and the slide slot seat protruding shaft 43 of the first slide slot seat 51 can slide along the connecting rod groove of the first gear connecting rod 5, and the slide slot seat protruding shaft 43 of the second slide slot seat 61 can slide along the connecting rod groove of the second gear connecting rod 6. Optionally, the first slide slot seat 51 is connected to the first middle frame 2 by screws, and the first gear connecting rod 5 rotates synchronously with the first middle frame 2, and the second slide slot seat 61 is connected to the second middle frame 3 by screws, and the second gear connecting rod 6 rotates synchronously with the second middle frame 3. Since the first middle frame 2 is connected to the first connector 14, and the second middle frame 3 is connected to the second connector 15, when the first slider 12 and the second slider 13 are away from each other, the rotation center of the first connector 14 is inconsistent with the rotation center of the first gear connecting rod 5, and the rotation center of the second connector 15 is inconsistent with the rotation center of the second gear connecting rod 6. In order to smoothly bend the first middle frame 2 and the second middle frame 3, the first gear connecting rod 5 and the first middle frame 2 need to be slidably connected through the first slide seat 51. Similarly, the second gear connecting rod 6 and the second middle frame 3 need to be slidably connected through the second slide seat 61. At the same time, the first slide seat 51 and the second slide seat 61 can adjust the distance between the first middle frame 2 and the second middle frame 3 by sliding synchronously when the screen length changes.

[0053] In some embodiments of the present invention, reference Figure 6-Figure 9 As shown, the first gear connecting rod 5 includes a first connecting rod gear 52. Optionally, the first connecting rod gear 52 is located outside the first shaft 41. The second gear connecting rod 6 includes a second connecting rod gear 62. Optionally, the second connecting rod gear 62 is located outside the second shaft 42. Figure 8-Figure 9 In the example, the first gear connecting rod 5 is divided into two small gear connecting rods, and both are provided with a first connecting rod gear 52; the second gear connecting rod 6 is divided into two small gear connecting rods, and both are provided with a second connecting rod gear 62.

[0054] The synchronous assembly also includes: a first gear shaft group 55 and a second gear shaft group 65, the first gear shaft group 55 and the second gear shaft group 65 are rotatably mounted on the gear seat 4, and optionally, a slot is provided on the gear seat 4, and the first gear shaft group 55 and the second gear shaft group 65 are engaged with the gear seat 4 and can rotate in the slot. The axes of the first gear shaft group 55 and the second gear shaft group 65 are parallel to the axes of the first shaft 41 and the second shaft 42, and the first gear shaft group 55 includes a first group of first gears 56 and a first group of second gears 54, and the first group of first gears 56 and the first group of second gears 54 are arranged on the corresponding gear shafts, and the first group of first gears 56 and the first connecting rod gear 52 are meshed for transmission, and the first group of second gears 54 and the second connecting rod gear 62 are meshed for transmission, and optionally, the first group of first gears 56 and the first group of second gears 54 are meshed for transmission, and the first group of first gears 56, the first connecting rod gear 52, the first group of second gears 54, and the second connecting rod gear 62 are meshed with each other to form a linkage, and synchronously drive with the first middle frame 2 and the second middle frame 3. The second gear shaft group 65 includes a second group of first gears 66 and a second group of second gears 64. The second group of first gears 66 and the second group of second gears 64 are arranged on corresponding gear shafts. The second group of first gears 66 mesh with the first connecting rod gear 52 for transmission, and the second group of second gears 64 mesh with the second connecting rod gear 62 for transmission. Optionally, meshing transmission occurs between the second group of first gears 66 and the second group of second gears 64, and the second group of first gears 66, the first connecting rod gear 52, the second group of second gears 64, and the second connecting rod gear 62 mesh with each other to form a linkage, and are driven synchronously with the first middle frame 2 and the second middle frame 3.

[0055] In some embodiments of the present invention, reference Figure 6-Figure 12 As shown, the first gear connecting rod 5 also includes a first connecting rod cam 53, and the second gear connecting rod 6 also includes a second connecting rod cam 63. Optionally, the first connecting rod cam 53 is arranged on at least one side of the first connecting rod gear 52, and the second connecting rod cam 63 is arranged on at least one side of the second connecting rod gear 62.

[0056] The synchronous assembly further includes: a cam group 44 and a spring 45. The cam group 44 includes a cam seat 46 and a first cam 461 and a second cam 462 formed on the cam seat 46. Optionally, the first cam 461 and the second cam 462 are located at both ends of the cam seat 46. The first connecting rod cam 53 is in contact with the first cam 461 for transmission, and the second connecting rod cam 63 is in contact with the second cam 462 for transmission. The first cam 461 and the second cam 462 both include an automatic flattening section 465, an automatic closing section 466, and a stable support section 464 located between the automatic flattening section 465 and the automatic closing section 466. The stable support section 464 is closer to the corresponding connecting rod cam than the automatic flattening section 465 and the automatic closing section 466. The first connecting rod cam 53 and the second connecting rod cam 63 have a convex section. The spring 45 is used to apply elastic force to make the first cam 461 abut against the convex section of the first connecting rod cam 53 and the second cam 462 abut against the convex section of the second connecting rod cam 63.

[0057] Optionally, in some embodiments, the cam group 44 can be arranged only on one side of the first gear shaft group 55, or only on one side of the second gear shaft group 65, or can be arranged on both the first gear shaft group 55 and the second gear shaft group 65. Taking the cam group 44 arranged on one side of the first gear shaft group 55 as an example, four holes are provided on the cam seat 46, and the cam seat 46 is sleeved on the first shaft 41, the two gear shafts of the first gear shaft group 55, and the second shaft 42. The cam seat 46 can move axially without rotational movement. There are four springs 45, and a retaining spring 48 is provided on one side of the four springs 45 away from the cam seat 46. The spring 45 stopper is provided with four holes, and the four springs 45 are respectively sleeved on the first shaft 41, the two gear shafts of the first gear shaft group 55, and the second shaft 42. The retaining spring 48 is used to fix the spring 45 and perform axial stop on the spring 45.

[0058] Optionally, refer to Fig.12As shown, the flexible folding screen is divided into three stages from closing to flattening. The first stage is the automatic closing stage. The raised section of the first connecting rod cam 53 contacts the automatic closing section 466 of the first cam 461, and the raised section of the second connecting rod cam 63 contacts the automatic closing section 466 of the second cam 462. In some embodiments, during the automatic closing stage, the angle α of the flexible folding screen is ≤20°. Optionally, when the angle α of the flexible folding screen is less than 20°, the elastic force of the spring 45 squeezes the first cam 461 and the second cam 462, so that the first cam 461 abuts against the raised section of the first connecting rod cam 53, and the second cam 462 abuts against the raised section of the second connecting rod cam 63. Specifically, the raised section of the first connecting rod cam 53 and the automatic closing section 466 of the first cam 461, and the raised section of the second connecting rod cam 63 and the automatic closing section 466 of the second cam 462 rub against each other to generate torque, and the screen has a tendency to close, and the screen can be closed automatically. Optionally, in some embodiments, when the angle α of the flexible folding screen is 20°, the raised section of the first connecting rod cam 53 and the first cam 461 , and the raised section of the second connecting rod cam 63 and the second cam 462 are both in point contact.

[0059] The second stage is the stop phase, the raised section of the first connecting rod cam 53 contacts the stable support section 464 of the first cam 461, and the raised section of the second connecting rod cam 63 contacts the stable support section 464 of the second cam 462. In some embodiments, during the stop phase, the angle α of the flexible folding screen is greater than 20° and less than 160°, that is, 20°<α<160°. When the angle of the flexible folding screen is 20°<α<160°, the spring 45 is in a compressed state, so that the first cam 461 abuts against the raised section of the first connecting rod cam 53, and the second cam 462 abuts against the raised section of the second connecting rod cam 63. Specifically, the raised section of the first connecting rod cam 53 abuts against the stable support section 464 of the first cam 461, and the raised section of the second connecting rod cam 63 abuts against the stable support section 464 of the second cam 462. The flexible folding screen can maintain the current angle and can stop at any angle.

[0060] The third stage is the automatic flattening stage, in which the raised section of the first connecting rod cam 53 contacts the automatic flattening section 465 of the first cam 461, and the raised section of the second connecting rod cam 63 contacts the automatic flattening section 465 of the second cam 462. In some embodiments, during the automatic flattening stage, the angle α of the flexible folding screen is ≥160°. Optionally, when the angle α of the flexible folding screen is 160°, the raised section of the first connecting rod cam 53 contacts the first cam 461, and the raised section of the second connecting rod cam 63 contacts the second cam 462, and the screen can be automatically flattened under the action of the elastic force of the spring 45. When the angle α of the flexible folding screen is greater than 160°, the spring 45 stretches and squeezes the first cam 461 and the second cam 462, so that the first cam 461 abuts against the raised section of the first connecting rod cam 53, and the second cam 462 abuts against the raised section of the second connecting rod cam 63. Specifically, the raised section of the first connecting rod cam 53 and the automatic flattening section 465 of the first cam 461, and the raised section of the second connecting rod cam 63 and the automatic flattening section 465 of the second cam 462 rub against each other to generate torque, and the screen has a tendency to flatten. In the absence of external force, the screen can be flattened automatically. The process from flattening to closing is opposite to the process from closing to flattening. The torque setting values ​​between the first connecting rod cam 53 and the first cam 461, and between the second connecting rod cam 63 and the second cam 462 are determined by the weight of the folding product and the rebound force of the screen.

[0061] In some embodiments of the present invention, reference Figure 2 , Figure 8-Figure 10 As shown, there are two cam groups 44, one of which is mounted on the first gear shaft group 55, and the other is mounted on the second gear shaft group 65. Providing two cam groups 44 can disperse the force more, reduce wear, and help protect the hinge assembly 100 and increase its service life.

[0062] According to another embodiment of the present invention, the flexible folding screen Fig.11 As shown, it includes a screen, a first middle frame 2, a second middle frame 3 and the above-mentioned hinge assembly 100, the first middle frame 2, the second middle frame 3 and the hinge assembly 100 are located on the back side of the screen, and the hinge assembly 100 is located between the first middle frame 2 and the second middle frame 3, the first connecting head 14 is fixedly connected to the first middle frame 2, and the second connecting head 15 is fixedly connected to the second middle frame 3.

[0063] According to the flexible folding screen of the embodiment of the present invention, the hinge assembly 100 can tension and straighten the screen, thereby improving the crease of the flexible folding screen.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hinge assembly (100) for a flexible folding screen, characterized in that: include: Base (1); A rotating assembly, the rotating assembly comprising a slider fixing seat (11), a first slider (12), a second slider (13), a first connecting head (14), a second connecting head (15) and an adjusting element, the slider fixing seat (11) being fixed to the base (1), the first slider (12) and the second slider (13) being able to slide along the slider fixing seat (11), the first connecting head (14) being pivotally connected to the first slider (12) and the first connecting head (14) being used to connect to a first middle frame (2) of the flexible folding screen, the second connecting head (15) being pivotally connected to the second slider (13) and the second connecting head (15) being used to connect to a second middle frame (3) of the flexible folding screen, and the adjusting element being used to at least drive the first slider (12) and the second slider (13) to move away from each other; The adjusting element comprises a wedge block (17), wherein the wedge block (17) has a first wedge surface (171) and a second wedge surface (172) which are arranged opposite to each other, and the distance between the first wedge surface (171) and the second wedge surface (172) gradually narrows; the first sliding block (12) has a first sliding groove (173), wherein the first wedge surface (171) abuts against the groove side wall of the first sliding groove (173); the second sliding block (13) has a second sliding groove (174), wherein the second wedge surface (172) abuts against the groove side wall of the second sliding groove (174); the length of the groove side wall of the first sliding groove (173) is greater than the length of the first wedge surface (171), and the length of the groove side wall of the second sliding groove (174) is greater than the length of the second wedge surface (172).

2. The hinge assembly (100) according to claim 1, characterized in that: The adjusting element further comprises an adjusting screw (18), wherein the adjusting screw (18) is threadedly connected to the wedge block (17), and when the adjusting screw (18) is rotated, it is suitable for driving the wedge block (17) to move along the axial direction of the adjusting screw (18).

3. The hinge assembly (100) according to claim 1, characterized in that: The adjusting element has a first extreme position and a second extreme position. In the first extreme position, the distance between the first slider (12) and the second slider (13) is the shortest; in the second extreme position, the distance between the first slider (12) and the second slider (13) is the farthest.

4. The hinge assembly (100) according to claim 3, characterized in that: The wedge block (17) has a symmetric plane, and the angle between the first wedge surface (171) and the symmetric plane, and the angle between the second wedge surface (172) and the symmetric plane are both θ. In the first limit position, the reserved gap between one end of the wedge block (17) and one end of the first slide groove (173) and the second slide groove (174) is G. When moving from the first limit position to the second limit position, the total movement of the first slider (12) and the second slider (13) is 2*△G*Tanθ.

5. The hinge assembly (100) according to any one of claims 1 to 4, characterized in that: Also included is a synchronous assembly, the synchronous assembly comprising: A gear seat (4), the gear seat (4) being fixed to the base (1), and the gear seat (4) being provided with a first shaft (41) and a second shaft (42) arranged in parallel; A first gear connecting rod (5) and a second gear connecting rod (6), wherein the first gear connecting rod (5) is pivotally connected to the first shaft (41), and the second gear connecting rod (6) is pivotally connected to the second shaft (42); A first slide groove seat (51) and a second slide groove seat (61), wherein the first slide groove seat (51) is slidably matched with the first gear connecting rod (5) and the first slide groove seat (51) is used to connect the first middle frame (2) of the flexible folding screen, and the second slide groove seat (61) is slidably matched with the second gear connecting rod (6) and the second slide groove seat (61) is used to connect the second middle frame (3) of the flexible folding screen.

6. The hinge assembly (100) according to claim 5, characterized in that: The first gear connecting rod (5) includes a first connecting rod gear (52), and the second gear connecting rod (6) includes a second connecting rod gear (62); The synchronous assembly also includes: a first gear shaft group (55) and a second gear shaft group (65), wherein the first gear shaft group (55) and the second gear shaft group (65) are rotatably mounted on the gear seat (4), and the axes of the first gear shaft group (55) and the second gear shaft group (65) are parallel to the axes of the first shaft (41) and the second shaft (42), wherein the first gear shaft group (55) includes a first group of first gears (56) and a first group of second gears (54), wherein the first group of first gears (56) meshes with the first connecting rod gear (52) for transmission, and the first group of second gears (54) meshes with the second connecting rod gear (62) for transmission, and the second group of first gears (65) includes a second group of first gears (66) and a second group of second gears (64), wherein the second group of first gears (66) meshes with the first connecting rod gear (52) for transmission, and the second group of second gears (64) meshes with the second connecting rod gear (62) for transmission.

7. The hinge assembly (100) according to claim 6, characterized in that: The first gear connecting rod (5) further comprises a first connecting rod cam (53), and the second gear connecting rod (6) further comprises a second connecting rod cam (63); The synchronous assembly also includes: a cam group (44) and a spring (45); the cam group (44) includes a cam seat (46) and a first cam (461) and a second cam (462) formed on the cam seat (46); the first connecting rod cam (53) is in contact with the first cam (461) for transmission; the second connecting rod cam (63) is in contact with the second cam (462) for transmission; the first cam (461) and the second cam (462) both include an automatic flattening section, an automatic closing section and a stable support section located between the automatic flattening section and the automatic closing section; the stable support section is closer to the corresponding connecting rod cam than the automatic flattening section and the automatic closing section; the first connecting rod cam (53) and the second connecting rod cam (63) have a convex section; the spring (45) is used to apply an elastic force to make the first cam (461) abut against the convex section of the first connecting rod cam (53) and the second cam (462) abut against the convex section of the second connecting rod cam (63).

8. The hinge assembly (100) according to claim 7, characterized in that: The cam groups (44) are divided into two groups, one of which is mounted on the first gear shaft group (55), and the other is mounted on the second gear shaft group (65).

9. A flexible folding screen, characterized in that: The invention comprises a screen, a first middle frame (2), a second middle frame (3) and a hinge assembly (100) according to any one of claims 1 to 8, wherein the first middle frame (2), the second middle frame (3) and the hinge assembly (100) are located on the back side of the screen, and the hinge assembly (100) is located between the first middle frame (2) and the second middle frame (3), the first connecting head (14) is fixedly connected to the first middle frame (2), and the second connecting head (15) is fixedly connected to the second middle frame (3).

Images