An inward folding hinge mechanism with good supporting effect

Abstract

The present invention discloses an inward-folding hinge mechanism with good supporting effect, belonging to the technical field of folding display devices, wherein the protective cover is provided with a first outer frame and a second outer frame, and each arm of the two is provided with an inclined surface on one side facing the protective cover; it also includes a hinge assembly, and the first outer frame and the second outer frame are connected to form a frame structure through the hinge assembly, and the two rotate around the same axis and switch the protective cover from a planar shape to an overlapping shape; the bending trajectory of the hinge assembly is an arc line, and the arc line is tangent to the extension line of the inclined surface; a support plate is hinged between the two arms of the first outer frame and the second outer frame, and the two support plates can be spliced ​​into a supporting plane, and the supporting plane is attached to the surface of the protective cover to maximize the curvature radius R of the protective cover during the inward folding process, while simplifying the overall structure of the hinge mechanism, so as to achieve the purpose of having good support during the use of the protective cover.

Description

Technical Field

[0001] The present invention belongs to the technical field of folding display devices, and in particular, relates to an inward-folding hinge mechanism with good supporting effect. Background Art

[0002] Flexible display devices have the advantages of impact resistance, light weight, and easy portability. They have functions and user experience advantages that traditional displays cannot achieve. Therefore, flexible display technology is receiving more and more attention, and the protective cover is an indispensable component in flexible display devices.

[0003] In the era of rapid development of smart phones, glass has always been the first choice for mobile phone covers due to the requirements of light transmittance, strength and surface hardness. With the maturity of 3D glass technology, glass covers have been extended to curved screen mobile phones with fixed curvature.

[0004] At present, different manufacturers have chosen CPI film as the protective cover for foldable displays. CPI film (Colorless Polyimide) is essentially a resin material polyimide, a type of polymer containing an imide ring (-CO-N-CO-) on the main chain, among which polymers containing phthalimide structure are the most important. As a special engineering material, polyimide has been widely used in aviation, aerospace, microelectronics, nano, liquid crystal, separation membrane, laser and other fields. The existing flexible OLED substrate is also PI, and CPI de-yellowing on the basis of PI to meet the optical requirements of the cover.

[0005] CPI is becoming more and more mature in technology and can be directly applied. However, its disadvantages are obvious: the surface hardness of CPI material is poor, resulting in more and more visible traces of bumps and bumps in daily use; in addition, film products have material fatigue problems and cannot restore the original flatness after tens of thousands of bends.

[0006] The existing foldable display screens mainly have the following defects:

[0007] 1) When the display screen using CPI film is unfolded, the middle of the screen is convex, with ripples and wrinkles;

[0008] 2) When the display screen using CPI film is unfolded, the screen itself is not flat enough;

[0009] 3) The display screen using CPI film is not smooth enough when opened and closed, and requires physical force;

[0010] 4) When a display screen using CPI film is folded, a gap will be formed at the fold;

[0011] 5) The hinge structure design for folding the display screen using the CPI film is complex and costly.

[0012] The reason for the above defects is that the CPI film, as a polymer material, has elastic properties. After repeated folding, the film will be relaxed, stretched and creased. This problem is a common problem when using polymer materials.

[0013] To address the above problems, the stress on the CPI film when it is repeatedly folded can be reduced, or it can be replaced with ultra-thin glass with higher surface strength and no relaxation, elongation or creases. In addition, the material itself has good self-repairing ability and can still restore its original flatness after long-term repeated bending, without the problem of fatigue of film materials. However, the fatal flaw of ultra-thin glass is that it is fragile, especially when it is folded inward, the stress it is subjected to is large, which can easily cause damage to the ultra-thin glass.

[0014] In summary, according to the stress formula Among them, ε = stress (dimensionless), Z = the distance between the neutral plane and the surface, R = radius of curvature. It can be seen from the above formula that in order to minimize stress, the radius of curvature R should be maximized under the required device thickness. By maximizing the radius of curvature R, the stress on the CPI film can be minimized, which can solve the problems of screen relaxation and creases. At the same time, ultra-thin glass with the smallest curvature radius that can be tolerated can also be used. If ultra-thin glass is used, the problems of screen relaxation and creases can also be solved. At the same time, in order to prevent gaps in the middle of the screen and ensure that the middle part of the screen can be smoothly opened and closed, a hinge structure needs to be developed. Summary of the invention

[0015] In view of this, in order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide an inward-folding hinge mechanism with good supporting effect so as to maximize the curvature radius R of the protective cover during the inward folding process and minimize the stress, while simplifying the overall structure of the hinge mechanism to achieve the purpose of having good support during the use of the protective cover.

[0016] The technical solution adopted by the present invention is: an inward folding hinge mechanism with good supporting effect, comprising a protective cover plate, on which a first outer frame and a second outer frame are arranged, the first outer frame and the second outer frame are both U-shaped structures, and each arm of the U-shaped structure is provided with an inclined surface on one side facing the protective cover plate; further comprising a hinge assembly, through which the first outer frame and the second outer frame are connected to form a frame structure, and the hinge assembly drives the first outer frame and the second outer frame to rotate around the same axis and switches the protective cover plate from a plane shape to an overlapping shape; the bending trajectory of the hinge assembly is a circular arc line, and the circular arc line is tangent to the extension line of the inclined surface;

[0017] A support plate is hinged between the two arms of the first outer frame and the second outer frame, and the two support plates can be spliced ​​into a support plane, which is attached to the surface of the protective cover plate to constrain the bending surface of the protective cover plate to achieve the purpose of maximum curvature radius R, thereby reducing the stress of the protective cover plate during the bending process to eliminate the phenomenon of creases that are easy to generate.

[0018] Furthermore, the two support plates are symmetrically arranged relative to the center line between the first outer frame and the second outer frame, and each support plate is attached to the surface of the protective cover plate and rotates with the protective cover plate to ensure that during the relative rotation of the first outer frame and the second outer frame, the two support plates can operate synchronously, and the supporting force for the protective cover plate is more stable.

[0019] Furthermore, the protective cover is ultra-thin glass or CPI film. This structure can be applied to both ultra-thin glass and CPI film. In particular, it can provide good support for CPI film in the initial state to prevent its surface from collapsing, and the structure is simple and reliable.

[0020] Furthermore, it also includes a first shell bottom plate, a second shell bottom plate and a cover, the first shell bottom plate and the second shell bottom plate are respectively connected to the first outer frame and the second outer frame, and the first shell bottom plate and the second shell bottom plate are respectively hingedly connected to two sides of the cover, and an inner cavity for accommodating the hinge assembly and the support plate is provided in the cover to realize the assembly of the cover to ensure that the cover can accommodate the protective cover after the protective cover is folded.

[0021] Furthermore, it also includes a shell side plate, which is configured to be a corrugated strip, and the side surfaces of the shell side plate are respectively connected to the first outer frame and the second outer frame.

[0022] Furthermore, the hinge assembly includes a bending channel arranged between the first outer frame and the second outer frame, a plurality of gears are arranged in the bending channel, and driving plates are provided on both sides of the bending channel, and driving teeth meshing with the gears are provided at the ends of the driving plates; the two driving plates are respectively slidably arranged at the ends of the arms of the first outer frame and the second outer frame, and the hinge assembly can realize a circular arc when the gears therein are meshed with each other, thereby well constraining the bending surface of the protective cover.

[0023] Furthermore, the ends of the arms of the first outer frame and the second outer frame are both provided with a slide groove, in which the drive plate is mounted, and a reserved space for the movement of the drive plate can be formed in the slide groove to realize the linkage of the drive plate.

[0024] Furthermore, the bending channel includes a first bending plate and a second bending plate which are arranged in parallel. The relative movement of the first outer frame and the second outer frame drives the bending movement of the first bending plate and the second bending plate. The first bending plate and the second bending plate realize the function of limiting each gear and can cooperate with each gear to realize the formation of a bending surface.

[0025] Furthermore, the first bending plate and the second bending plate are both made of flexible materials, and the flexible materials can ensure smooth bending operations.

[0026] Furthermore, both ends of the first bent plate are respectively mounted on the ends of the arms of the first outer frame and the second outer frame, and both ends of the second bent plate are respectively mounted on the ends of the arms of the first outer frame and the second outer frame, which can simplify the complexity of the overall structure.

[0027] The beneficial effects of the present invention are:

[0028] 1. The inward-folding hinge mechanism suitable for the display device provided by the present invention is adopted to realize the relative rotation of the first outer frame and the second outer frame through the hinge assembly, and the bending trajectory of the hinge assembly is a circular arc line, which is tangent to the inclined surface to ensure that after the protective cover plate is bent, the bending curve of the protective cover plate has the largest curvature radius, so as to minimize the stress borne by the protective cover plate, so as to alleviate the problem of a large number of creases easily appearing on the protective cover plate during the reciprocating folding process in the prior art.

[0029] 2. Support plates are provided inside the first outer frame and the second outer frame, and the support plates are supported on the surface of the protective cover plate. At the same time, the two support plates are spliced ​​into a supporting plane, so as to provide good support for protective cover plates made of different materials. It has a wide applicability and can solve the problem of surface collapse that is prone to occur when the protective cover plate is bent between the first outer frame and the second outer frame, especially when the CPI film is used as the protective cover plate.

[0030] 3. The hinge assembly used in the present application is driven by multiple gears and driving plates at both ends, so that when the first outer frame and the second outer frame rotate relative to each other, the bending trajectory of the hinge assembly is an arc line. Compared with the existing hinge assembly, it has the advantages of simple structure and uniform and gentle bending trajectory.

[0031] 4. A cover is also provided between the first outer frame and the second outer frame. When the hinge mechanism is in a bent state, the ends of the two support plates can be accommodated by the cover to ensure the aesthetic appearance of the entire hinge mechanism. At the same time, it can provide good protection for the hinge assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a schematic diagram of the overall assembly structure of Example 1 of the inward-folding hinge mechanism with good supporting effect provided by the present invention in an unfolded state;

[0033] Figure 2 yes Figure 1 A partial enlarged schematic diagram of

[0034] Figure 3 It is a schematic diagram of the overall assembly structure of Example 1 of the inward-folding hinge mechanism with good supporting effect provided by the present invention in an unfolded state;

[0035] Figure 4 It is a schematic diagram of the overall assembly structure of Example 1 of the inward-folding hinge mechanism with good supporting effect provided by the present invention in a folded state;

[0036] Figure 5 It is a schematic diagram of the internal structure of Example 1 of the inward-folding hinge mechanism with good supporting effect provided by the present invention in a folded state;

[0037] Figure 6 It is an overall external schematic diagram of the inward folding hinge mechanism with good supporting effect provided by the present invention;

[0038] Figure 7 is a structural schematic diagram of a hinge assembly in Example 2 of an inward-folding hinge mechanism with good supporting effect provided by the present invention;

[0039] Figure 8 is a structural schematic diagram of a hinge assembly in Example 3 of an inward-folding hinge mechanism with good supporting effect provided by the present invention;

[0040] Fig. 9 yes Figure 8 Schematic diagram of the local structure;

[0041] Fig.10 It is a schematic diagram of the assembly structure of the cover in Example 1 of the inward folding hinge mechanism with good supporting effect provided by the present invention;

[0042] The reference numerals are as follows:

[0043] Protective cover plate -1, first outer frame -2, second outer frame -3, cover -4, inclined surface -5, support plate -6, first bending plate -7, drive plate -8, second bending plate -9, first shell bottom plate -10, second shell bottom plate -11, shell side plate -12, first shielding side plate -13, second shielding side plate -14, gear -15, slide groove -16, third drive plate -17, bending chain -18, first drive plate -19 and second drive plate -20, hanging groove -21, hook -22, hinged plate -23. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the invention product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does 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 cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" 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 direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The drawings in the embodiments of the present invention clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0050] Example 1

[0051] like Figure 1 As shown, in this embodiment, an inward folding hinge mechanism with good supporting effect is provided, which includes a protective cover plate 1. The protective cover plate 1 is used to be assembled on the flexible display screen to provide good protection for the flexible display screen, which will not be described in detail here.

[0052] like Figure 2 As shown, a first outer frame 2 and a second outer frame 3 are provided on the same side of the protective cover plate 1. The first outer frame 2 and the second outer frame 3 adopt the same shape and size structure, and a gap is left between the two to ensure that the first outer frame 2 and the second outer frame 3 can rotate relative to each other. The first outer frame 2 and the second outer frame 3 are both U-shaped structures, and the opening ends of the first outer frame 2 and the second outer frame 3 are arranged opposite to each other. Each arm of the U-shaped structure is provided with an inclined surface 5 on the side facing the protective cover plate 1. In theory, the inclination angle of the inclined surface 5 should be as small as possible, and the bending stress on the protective cover plate 1 is smaller. However, in actual products, the length of the arms of the first outer frame 2 and the second outer frame 3 should be considered to reasonably set the inclination angle of the inclined surface 5. The inclination angle of the inclined surface 5 can be limited to between 10° and 20°. Preferably, in this embodiment, the inclination angle of the inclined surface 5 is 15°.

[0053] like Figure 5 As shown, the display screen also includes a hinge assembly, through which the first outer frame 2 and the second outer frame 3 are connected to form a frame structure, the frame structure forms an assembly space for the display screen, and the hinge assembly drives the first outer frame 2 and the second outer frame 3 to rotate around the same axis (causing the first outer frame 2 and the second outer frame 3 to be in the same horizontal plane or in a mutually folded state), and when the two rotate relative to each other, the protective cover plate 1 can be switched from a flat state to an overlapping state, so as to realize the function of a folding screen; the bending trajectory of the hinge assembly is an arc line, and the bending trajectory of the arc line can be well aligned with the bending surface of the protective cover plate 1 The protective cover 1 is well matched and has a constraining effect on its bending surface to control the bending radius of the protective cover 1, so as to ultimately reduce the stress of the protective cover 1 during the bending process. The arc line is tangent to the extension line of the inclined surface 5 to ensure that the bending surface of the protective cover 1 can make a good transition during the bending process. From a differential point of view, since there is no too small bending surface segment on the bending surface of the protective cover 1, it can be ensured that the transition between the inclined surface 5 of the protective cover 1 and the bending surface has a minimum curvature. At this time, the curvature radius is the largest, the stress is the smallest, and the generation of creases is minimized.

[0054] like Figure 3As shown, a support plate 6 is hinged between the two arms of the first outer frame 2 and the second outer frame 3, and the support plate 6 is attached to the surface of the protective cover 1 and rotates with the protective cover 1 to provide a good support effect for the protective cover 1 in real time; when in the unfolded state, the two support plates 6 can be spliced ​​into a support plane, which is attached to the surface of the protective cover 1, and the rotation trajectories of the two support plates 6 are tangent (that is, there is no gap between the opposite sides of the two support plates 6). In order to ensure that the two support plates 6 can be spliced ​​into a support plane in the initial state, therefore, when the first outer frame 2 and the second outer frame 3 are in the folded state, the end side edges of the two support plates 6 will extend out of the range of the curved surface formed by the hinge assembly.

[0055] In this embodiment, in order to further enhance the supporting effect of the support plate 6, the support plate 6 is hinged to the two arms of the first outer frame 2 and the second outer frame 3 through a rotating shaft, and a torsion spring (not shown in the drawings) is sleeved on the rotating shaft. The torsion spring provides appropriate restoring force to the support plate 6, so that when the protective cover 1 switches from a folded state to a planar state, the support plate 6 can be reset to a horizontal state and provide good support for the protective cover 1; at the same time, the surface of the support plate 6 should be in contact with the surface of the protective cover 1 in the initial state; the surface of the support plate 6 should be flush with the surface of the inclined surface 5 when it is in the folded state, so that the protective cover 1 can be attached to the surface of the protective cover 1 in real time to provide good support for the protective cover 1.

[0056] In order to reduce the manufacturing cost and the stability of the hinge structure during operation, Figure 3 As shown, the two support plates 6 are symmetrically arranged relative to the center line between the first outer frame 2 and the second outer frame 3, and each support plate 6 is attached to the surface of the protective cover plate 1 and rotates with the protective cover plate 1, so as to achieve that during the relative rotation of the first outer frame 2 and the second outer frame 3, the two support plates 6 can initially move synchronously and provide the same supporting force to the protective cover plate 1.

[0057] When the protective cover plate 1 is made of ultra-thin glass or CPI film, especially when CPI film is used as the protective cover plate 1, the two support plates 6 can be spliced ​​into a support plane in the unfolded state, and the support plane can prevent the CPI film from collapsing, and at the same time, it will not increase the complexity of the entire hinge mechanism.

[0058] like Fig.10As shown, it also includes a first shell bottom plate 10, a second shell bottom plate 11 and a cover 4. The first shell bottom plate 10 and the second shell bottom plate 11 are located in the same plane and are respectively connected to the first outer frame 2 and the second outer frame 3. The first shell bottom plate 10 and the second shell bottom plate 11 are respectively hingedly connected to the two sides of the cover 4. The cover 4 is provided with an inner cavity for accommodating the hinge assembly and the support plate 6. The cover 4 is a rectangular frame with one end open. The first shell bottom plate 10 and the second shell bottom plate 11 are respectively hingedly connected to the opposite sides of the rectangular frame. The other two opposite side plates (named: the first shielding side plate 13 and the second shielding side plate 14) should be higher than the plane where the opening end of the rectangular frame is located. Fig.10 With this structure, when the hinge mechanism is in a folded state, the two opposite side panels can shield the side structures.

[0059] like Figure 6 As shown, it also includes an outer shell side panel 12, which is configured to be a corrugated strip, and the side surfaces of the outer shell side panel 12 are respectively connected to the first outer frame 2 and the second outer frame 3. The outer shell side panel 12 is used to beautify the appearance on the one hand, and on the other hand, when the first outer frame 2 and the second outer frame 3 rotate relative to each other, the outer shell side panel in the shape of a corrugated strip can produce a good deformation effect. The use of the outer shell side panel 12 in the shape of a corrugated strip is only a preferred technical solution in this embodiment. In actual situations, since the cover 4 is provided with a first shielding side panel 13 and a second shielding side panel 14, the outer shell side panel can be provided with two and respectively arranged on the sides of the first outer frame 2 and the second outer frame 3. When the first outer frame 2 and the second outer frame 3 are rotated to a folded state, the ends of the outer shell side panel can be shielded by the first shielding side panel 13 and the second shielding side panel 14, which can also ensure a good appearance. Of course, as Figure 4 As shown, a structure in which the first shielding side panel 13 and the second shielding side panel 14 are flush with the open end surface of the cover 4 may also be provided, and the outer shell side panel 12 mounted on the first outer frame 2 and the second outer frame 3 should have a gap reserved at the end close to the cover 4 to ensure that the first outer frame 2 and the second outer frame 3 can rotate normally and after rotation, the outer shell side panel 12 should be spliced ​​with the cover 4.

[0060] The hinge assembly includes a bending channel arranged between the first outer frame 2 and the second outer frame 3, that is, the bending channel is a channel path that can generate deformation, and a plurality of gears 15 are arranged in the bending channel. The size of each gear 15 is determined by the internal space of the bending channel and each gear 15 is a columnar structure, and driving plates 8 are provided on both sides of the bending channel, and driving teeth meshing with the gears 15 are provided at the ends of the driving plates 8, and driving teeth meshing with the gears 15 are provided at the ends of the driving plates 8; the two driving plates 8 are respectively slidably arranged at the ends of the arms of the first outer frame 2 and the second outer frame 3. When the first outer frame 2 and the second outer frame 3 rotate relative to each other, the first outer frame 2 and the second outer frame 3 will be linked to their respective driving plates 8 to rotate, and during the rotation of the driving plate 8, the gears 15 will be linked to rotate as well. At the same time, since the driving plate 8 can also generate sliding motion inside the first outer frame 2 and the second outer frame 3, after the bending channel is bent, it can be ensured that when the protective cover 1 is in a folded state, the bending curve of the bending channel is in an arc shape, so as to prevent the ultra-thin glass from being fragile at the bending position.

[0061] like Figure 3 As shown, the ends of the arms of the first outer frame 2 and the second outer frame 3 are both provided with a slide groove 16, in which the drive plate 8 is installed. When the first outer frame 2 and the second outer frame 3 are in a horizontal state, the distance between the bottoms of the two slide grooves should be greater than the distance between the ends of the two drive plates 8, so that during the bending process, the drive plate 8 can slide in the slide groove 16 to adjust and adapt to the bending radius.

[0062] like Figure 2 As shown, the bending channel includes a first bending plate 7 and a second bending plate 9 which are arranged in parallel, and the first outer frame 2 and the second outer frame 3 can drive the bending movement of the first bending plate 7 and the second bending plate 9 when the first outer frame 2 and the second outer frame 3 move relative to each other. During the bending movement, the gears 15 inside the bending channel mesh with each other to well constrain the bending surface of the bending channel; the first bending plate 7 and the second bending plate 9 are both made of flexible materials, such as: among non-metallic polymer materials, one or more of polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonates (PC), polysulfones (PES), polyimide (PI), etc.;

[0063] Metal: one or more of metal polymer materials such as Nickel Titanium, Copper / Zinc / Aluminiumalloy, Copper / Aluminium / Nickel alloy, and stainless steel.

[0064] The two ends of the first bending plate 7 are respectively assembled on the ends of the supporting arms of the first outer frame 2 and the second outer frame 3, and the two ends of the second bending plate 9 are respectively assembled on the ends of the supporting arms of the first outer frame 2 and the second outer frame 3. In this embodiment, the two ends of the first bending plate 7 and the second bending plate 9 are respectively clamped in the corresponding sliding grooves 16.

[0065] Example 2

[0066] like Figure 7 As shown, based on Example 1 and Example 2, in the actual product application process, the hinge assembly can also be implemented by the following structure, the hinge assembly includes a bending channel and a bending chain 18 installed inside the bending channel, the bending chain 18 is configured as a watch strap structure, there are many types of watch strap structures, and the structure adopted in this embodiment is shown in Figure 7 as an example; the end of the arm of the first outer frame 2 and the second outer frame 3 is slidably provided with a third drive plate 17, and the end of the third drive plate 17 is hingedly connected to the bending chain 18.

[0067] The bending channel includes a first bending plate 7 and a second bending plate 9 which are arranged in parallel. The relative movement of the first outer frame 2 and the second outer frame 3 drives the bending movement of the first bending plate 7 and the second bending plate 9. During the bending movement, the bending chain 18 inside the bending channel is linked under the action of the driving plate to well constrain the bending surface of the bending channel and ensure that the bending surface is in an arc shape. The first bending plate 7 and the second bending plate 9 are both made of flexible materials. In the embodiment, the flexible material is: among the non-metallic polymer materials, one or more of polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polysulfones (PES), polyimide (PI) and other non-metallic polymer materials;

[0068] Metal: one or more of metal polymer materials such as Nickel Titanium, Copper / Zinc / Aluminiumalloy, Copper / Aluminium / Nickel alloy, and stainless steel.

[0069] In the above, the size of the bending chain 18 is designed to be set according to the bending radius of the bending channel. When the bending radius is smaller, the size of the unit chain link in the bending chain 18 should be reduced. When the first outer frame 2 and the second outer frame 3 rotate relative to each other, under the driving action of the driving plates at both ends, each unit chain link in the bending chain 18 can be linked to make a micro-rotation, so as to realize the formation of a bending curved surface of the entire bending chain 18, and the bending curved surface can provide good support for the protective cover 1.

[0070] Example 3

[0071] like Figure 8 , Fig. 9 As shown, based on Example 1 and Example 2, in the actual product application process, the hinge assembly can also be implemented by the following structure, the hinge assembly includes a bending channel and a plurality of hinge plates 23 assembled in the bending channel, and the opposite sides of each hinge plate 23 are respectively provided with a hanging groove 21 and a hook 22, and the hanging groove 21 and the hook 22 on each hinge plate 23 are assembled and connected in sequence to form a hinge chain plate; the arm ends of the first outer frame 2 and the second outer frame 3 are respectively slidably provided with a first driving plate 19 and a second driving plate 20, and the first driving plate 19 and the second driving plate 20 are respectively provided with a hook 22 and a hanging groove 21, and the hook 22 and the hanging groove 21 are respectively assembled and connected with the two ends of the hinge chain plate.

[0072] The bending channel comprises a first bending plate 7 and a second bending plate 9 which are arranged in parallel. The relative movement of the first outer frame 2 and the second outer frame 3 drives the bending movement of the first bending plate 7 and the second bending plate 9. During the bending movement, the hinged plates 23 inside the bending channel are linked to each other to well constrain the bending surface of the bending channel and ensure that the bending surface is in an arc shape. The first bending plate 7 and the second bending plate 9 are both made of flexible materials. In the embodiment, the flexible material is: among the non-metallic polymer materials, one or more of polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonates (PC), polysulfones (PES), polyimide (PI) and the like.

[0073] Metal: one or more of metal polymer materials such as Nickel Titanium, Copper / Zinc / Aluminiumalloy, Copper / Aluminium / Nickel alloy, and stainless steel.

[0074] In the above, the size of the hinge plate 23 is designed to be set according to the bending radius of the bending channel. When the bending radius is smaller, the width of the hinge plate 23 should be reduced. When the first outer frame 2 and the second outer frame 3 rotate relative to each other, under the driving action of the first driving plate 19 and the second driving plate 20, each hinge plate 23 can be linked to make a slight rotation, so as to realize bending the entire hinge chain plate to form a bending surface, and the bending surface can provide good support for the protective cover 1.

[0075] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. An inward folding hinge mechanism with good supporting effect, comprising a protective cover plate, wherein the protective cover plate is provided with a first outer frame and a second outer frame, It is characterized in that The first outer frame and the second outer frame are both in a U-shaped structure, and each arm of the U-shaped structure is provided with an inclined surface on one side facing the protective cover plate; the hinge assembly is also included, and the first outer frame and the second outer frame are connected to form a frame structure through the hinge assembly, and the hinge assembly drives the first outer frame and the second outer frame to rotate around the same axis and switches the protective cover plate from a flat shape to an overlapping shape; the bending trajectory of the hinge assembly is an arc line, and the arc line is tangent to the extension line of the inclined surface; A support plate is hinged between the two arms of the first outer frame and the second outer frame, and the two support plates can be spliced ​​into a support plane, which is attached to the surface of the protective cover plate; In the folded state, the inclined surface is attached to the protective cover for support; the bending trajectory of the arc line can be well matched with the bending surface of the protective cover and play a restraining role on its bending surface; The hinge assembly includes a bending channel disposed between a first outer frame and a second outer frame, the bending channel includes a first bending plate and a second bending plate disposed in parallel, and the relative movement of the first outer frame and the second outer frame drives the bending movement of the first bending plate and the second bending plate; Two ends of the first bending plate are respectively mounted on the ends of the supporting arms of the first outer frame and the second outer frame, and two ends of the second bending plate are respectively mounted on the ends of the supporting arms of the first outer frame and the second outer frame.

2. The inward-folding hinge mechanism with good supporting effect according to claim 1, It is characterized in that The two support plates are symmetrically arranged relative to the center line between the first outer frame and the second outer frame, and each support plate is attached to the surface of the protection cover plate and rotates with the protection cover plate.

3. The inward-folding hinge mechanism with good supporting effect according to claim 1 or 2, It is characterized in that The protective cover plate is ultra-thin glass or CPI film.

4. The inward-folding hinge mechanism with good supporting effect according to claim 1, It is characterized in that It also includes a first shell bottom plate, a second shell bottom plate and a cover, wherein the first shell bottom plate and the second shell bottom plate are respectively connected to the first outer frame and the second outer frame, and the first shell bottom plate and the second shell bottom plate are respectively hingedly connected to two sides of the cover, and an inner cavity for accommodating the hinge assembly and the support plate is provided in the cover.

5. The inward-folding hinge mechanism with good supporting effect according to claim 1, It is characterized in that It also includes a shell side plate, which is configured to be a corrugated strip, and the side surfaces of the shell side plate are respectively connected to the first outer frame and the second outer frame.

6. The inward-folding hinge mechanism with good supporting effect according to claim 1, It is characterized in that A plurality of gears are arranged in the bending channel, and driving plates are arranged on both sides of the bending channel, and driving teeth meshing with the gears are arranged at the ends of the driving plates; the two driving plates are respectively slidably arranged at the ends of the arms of the first outer frame and the second outer frame.

7. The inward-folding hinge mechanism with good supporting effect according to claim 6, It is characterized in that The ends of the supporting arms of the first outer frame and the second outer frame are both provided with sliding grooves, in which the driving plate is installed.

8. The inward-folding hinge mechanism with good supporting effect according to claim 1, It is characterized in that The first bending plate and the second bending plate are both made of flexible materials.

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