Folding display screen

Abstract

The invention provides a folding display screen which comprises a plurality of display modules, a bearing strip, a plurality of limiting seats and limiting parts, the display modules are hinged in sequence, a reinforcing rib line is fixed to the bearing strip, and the reinforcing rib line extends from top to bottom and passes through the back face of each display module; the plurality of limiting seats are respectively arranged on the back surface of each display module; the limiting pieces are installed in the limiting bases of the odd number of display modules to press the reinforcing rib lines tightly and limit movement of the reinforcing rib lines on the back faces of the odd number of display modules. According to the structure provided by the invention, the flexible supporting framework is formed in the limiting seats through the reinforcing rib lines, and the limiting pieces are only mounted in the limiting seats of the odd number of display modules, so that the reinforcing rib lines are divided into fixed sections and moving sections which are alternated; during alternate folding, the alternate folding action of the display module is realized by directly utilizing the displacement of the reinforcing rib lines in the folding process, an auxiliary device for adjusting the positions of the rib lines does not need to be arranged, the structure is simple and practical, and faults are not easy to occur.

Description

Technical Field

[0001] The present invention relates to the field of screen display, and particularly to a foldable display screen. Background Art

[0002] In order to facilitate the handling and storage of large display screens, in the prior art, multiple display units are hinged up and down to form a foldable display screen. When in use, it can be unfolded, and a whole display surface is formed by multiple display units for display. However, after unfolding, only the topmost display unit is fixed, and the other display units are unfolded layer by layer through the hinge structure, resulting in a gradient distribution of longitudinal tensile forces on the screen assembly. Due to the action of gravity and insufficient rigidity of the hinge structure, the display units are prone to deformation due to stress concentration or fatigue damage of the connecting components, reducing the screen life.

[0003] To solve this problem, the prior art CN112530297A proposes a steel wire longitudinal reinforcement scheme. By setting positioning blocks on the steel wire to cooperate with the limit seats on the back of the display unit, multi-point support is realized to balance the force. Specifically, it includes three structural forms of the linkage between the steel wire and the lifting device, and the steel wire is pre-tightened to provide support force for each display unit. However, such a scheme has inherent defects: the steel wire needs to form a complex linkage structure with the lifting device, positioning blocks and limit seats, resulting in a significant increase in manufacturing cost and a high failure rate; if the accuracy of the lifting device is insufficient or worn, it may hinder the folding action of the screen or cause movement jamming, ultimately resulting in a flatness deviation when the screen is unfolded. Summary of the Invention

[0004] The present invention aims to solve the above technical problems in the prior art and proposes a foldable display screen.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The present invention proposes a foldable display screen, comprising:

[0007] Multiple display modules, which are sequentially hinged, and when folding, they are folded from bottom to top in sequence. The first display module from bottom to top is folded back to back with the second display module, the second display module is folded face to face with the third display module, and so on until the topmost display module;

[0008] A load-bearing bar, fixed with reinforcing wire, and the reinforcing wire extends from top to bottom and passes through the back of each display module;

[0009] Multiple limit seats, which are respectively arranged on the back of each display module and are used to pass through the reinforcing wire to limit the reinforcing wire at a position close to the back of the display module;

[0010] The limiting member is installed in the limiting seat of the odd-numbered display module to press the reinforcing rib wire, restricting the movement of the reinforcing rib wire on the back of the odd-numbered display module.

[0011] Specifically, the limiting seat includes a limiting base and a limiting cover. The limiting base is installed on the back of the display module and is provided with a longitudinal limiting groove passing through the reinforcing rib wire. The limiting cover is installed on the limiting base and covers the notch of the limiting groove.

[0012] Furthermore, the limiting member is installed between the limiting base and the limiting cover. The limiting member is connected to the limiting base to press the limiting rib strip in the limiting groove, or the limiting cover presses the limiting rib strip through the limiting member.

[0013] Furthermore, the limiting base and the limiting cover are strip-shaped, and the upper and lower ends are close to the upper and lower ends of the display module. The distance between the upper end of the limiting base and the upper end of the display module is equal to the distance between the lower end of the limiting base and the lower end of the display module.

[0014] Furthermore, a plurality of pairs of convex columns are arranged at intervals from top to bottom on the limiting base. The gap between each pair of convex columns forms the limiting groove, and the reinforcing rib wire sequentially passes through the gaps between each pair of convex columns from top to bottom.

[0015] Furthermore, the limiting member is a limiting gasket, and through holes are provided at the positions corresponding to the convex columns on the limiting gasket.

[0016] Furthermore, each display module includes a plurality of horizontally arranged display units, and the backs of the vertical edges of two adjacent display units are connected through the limiting seat.

[0017] Furthermore, a plurality of the limiting seats are arranged at horizontal intervals on the back of each display module. A corresponding number of the reinforcing rib wires are arranged at intervals along the length direction of the load-bearing strip, and each reinforcing rib wire passes through a column of the limiting seats.

[0018] Specifically, load-bearing studs are provided on the load-bearing strip. The upper end of the reinforcing rib wire is wound around the load-bearing stud and fixed by a fixing screw threadedly connected to the load-bearing stud.

[0019] Preferably, the reinforcing rib wire is a steel wire.

[0020] Compared with the prior art, the present invention proposes to form a flexible support framework in the limit seat through the reinforcing rib lines, and cooperate with the limit pieces of the single display module to achieve uniform stress distribution. Moreover, the limit pieces are only installed in the limit seats of the single display module, and a reinforcing rib line is actually divided into an alternating form of a fixed section, a moving section, and a fixed section. When folding alternately, the alternating folding action of the display module is directly realized by using the moving displacement of the reinforcing rib line itself during the folding process, without the need to set up auxiliary devices to adjust the position of the rib line, and the structure is simple and practical and not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic plan view of two display modules in an embodiment of the present invention;

[0023] Figure 2 It is a schematic structural view during folding in an embodiment of the present invention;

[0024] Figure 3 It is a schematic side view during folding in an embodiment of the present invention;

[0025] Figure 4 It is a schematic plan view of four display modules in an embodiment of the present invention;

[0026] Figure 5 For Figure 4 the three-dimensional structural view of the circled position;

[0027] Figure 6 It is a schematic plan view of the position of the limit seat in an embodiment of the present invention;

[0028] Figure 7 It is a schematic plan view of three display modules in an embodiment of the present invention;

[0029] Figure 8 It is a schematic three-dimensional view of three display modules in an embodiment of the present invention;

[0030] Figure 9 It is a schematic plan view of three display modules in an embodiment of the present invention with the steel wires and limit pieces hidden;

[0031] Figure 10 It is a schematic plan view of three display modules in an embodiment of the present invention with the steel wires hidden;

[0032] Figure 11 Schematic diagram of the structure of the three display module installation limiters in the embodiment of the present invention;

[0033] Figure 12 is Figure 11 partial enlarged view;

[0034] Figure 13 Planar structure schematic diagram after installing the steel wire in the embodiment of the present invention;

[0035] Figure 14 is Figure 13 partial enlarged view;

[0036] Figure 15 Planar structure schematic diagram after the steel wire is limited in the embodiment of the present invention;

[0037] Figure 16 is Figure 15 partial enlarged view;

[0038] Figure 17 Side view structure schematic diagram after the steel wire is limited in the embodiment of the present invention;

[0039] 1. Display module;

[0040] 11. First display module; 12. Second display module; 13. Third display module; 111. Display unit;

[0041] 2. Load-bearing bar;

[0042] 21. Fixing screw; 22. Load-bearing stud;

[0043] 3. Reinforcing rib wire;

[0044] 31. First folding point; 32. Second folding point;

[0045] 4. Limit seat;

[0046] 41. Limit base; 42. Limit cover; 43. Convex column;

[0047] 5. Limiter. Detailed implementation manners

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The principle and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0050] In the prior art, in the anti-tensile structure and display device for improving the stability of a folding screen in CN112530297A, when the folding screen needs to be folded, a lifting device is used to release the reinforcing wire downward, and there is no force connection between the limit seat and the positioning block, so as to avoid affecting the folding and unfolding actions of the screen. In this device, in order to avoid affecting the folding and unfolding of the screen, the wire needs to form a complex linkage structure with the lifting device, the positioning block and the limit seat, resulting in a significant increase in manufacturing cost and a relatively high failure rate.

[0051] In response to this, as Figure 1 、 2 、shown in Figure 3, the present invention proposes a folding display screen, including: multiple display modules 1, load-bearing bars 2, multiple limit seats 4 and limit members 5. Among them:

[0052] The A side of the display module 1 is the light-emitting surface, and the B side is the back surface. Multiple display modules 1 are sequentially connected through a hinge structure, and a stepped folding structure is formed from bottom to top when folded. The first display module 11 and the second display module 12 are folded back to back, and the second display module 12 and the third display module 13 are folded face to face, and so on until the uppermost display module 1, to achieve stability during space storage and flatness during unfolding by alternating the folding directions. The load-bearing bar 2 is located above the uppermost display module, and a longitudinally extending reinforcing rib line 3 is fixed thereon. This rib line passes downward from the top display module 1 through the back surfaces of all display modules 1. Multiple limit seats 4 are respectively installed at preset positions on the back surface of each display module 1, and a wire groove or a guiding hole is provided inside for the reinforcing rib line 3 to pass through, and the limit seat 4 is fixed to the back surface of the display module 1 through a snap or thread structure to ensure that the rib line always adheres to the back surface of the module. The limit member 5 is installed inside the limit seat 4 of the odd-numbered display modules 1 (such as the first display module 11 and the third display module 13), and specifically, an elastic pressing structure or a thread locking structure can be adopted, as Figure 5 、 6 shown, to limit the axial displacement of the reinforcing rib line 3 on the back surface of the odd-numbered display modules 1, forming an alternating limit mode of "fixed-free-fixed".

[0053] This structure forms a flexible support framework through the reinforcing rib line 3 in the limit seat 4, and cooperates with the limit members 5 of the odd-numbered display modules 1 to achieve uniform stress distribution. Since the limit members 5 are only installed in the limit seats 4 of the odd-numbered display modules 1, a reinforcing rib line 3 is actually divided into an alternating form of fixed segments, moving segments and fixed segments, as Figure 3As shown, when folding alternately, the first display module 11 and the second display module 12 are folded back to back (referred to as the first fold). The folding radius of the reinforcing rib line 3 at the first folding position 31 between the two modules is small, and it is shorter than the reinforcing rib line 3 required when not folded. Thus, the redundant reinforcing rib line 3 can move towards the back of the second display module 12. The second display module 12 and the third display module 13 are folded face to face (referred to as the second fold). The folding radius of the reinforcing rib line 3 at the second folding position 32 is large, and more reinforcing rib line 3 is required. At this time, the redundant reinforcing rib line 3 generated by the first fold will be pulled up and utilized to complete the second fold smoothly. Alternating this process completes the folding of the entire display screen. This method directly utilizes the displacement of the reinforcing rib line 3 itself during the folding process to achieve the alternating folding action of the display module 1, without the need to set up auxiliary devices to adjust the position of the rib line, with a simple and practical structure and not prone to failure.

[0054] In a specific embodiment, as Figure 4 、 5 、6 shows, the limit seat 4 specifically includes a limit base 41 and a limit cover 42. The limit base 41 is fixed to the back of the display module 1 by means of buckles or screws. Its main body is a long strip-shaped sheet structure with a longitudinally penetrating limit groove opened at the central position. The width of the groove matches the cross-sectional size of the reinforcing rib line 3 to ensure that the rib line accurately passes through the groove. The limit cover 42 is buckled above the limit base 41, and it is tightly closed with the base by means of threads or buckles, completely covering the opening end of the limit groove to form a physical restraint on the rib line. The groove of the base restricts the left and right offsets, and the cover restricts the upward movement, forming a three-dimensional limit. The combined structure of the base and the cover not only ensures that the rib line does not have lateral offsets during longitudinal movement, and the tight contact in the closed state effectively prevents external dust from entering the limit area, but also facilitates the installation and maintenance of the rib line through the opening and closing design.

[0055] The limiting member 5 is arranged in the sandwich space between the limiting base 41 and the limiting cover 42. Its main body is sheet-shaped. The limiting member 5 is directly connected to the limiting base 41 by screws. It extends into the limit groove and abuts against the surface of the reinforcing rib line 3, and can generate a continuous and stable locking force on the rib line. This direct connection method makes the pressing force direction perpendicular to the axis of the rib line, and ensures the locking reliability through the structural strength of the base.

[0056] In a specific embodiment, both the limit base 41 and the limit cover 42 adopt long strip-shaped sheet structures, and their longitudinal length directions extend parallel to the frame of the display module 1, and both ends of the limit base 41 extend beyond the limit cover 42. The upper and lower ends of the limit base 41 and the limit cover 42 are arranged adjacent to the upper and lower edges of the display module 1 respectively. Specifically, the distance from the upper edge of the limit base to the upper edge of the display module 1 is equal to the distance from the lower edge of the limit base to the lower edge of the display module 1. Make the redundant reinforcing rib line 3 generated by the first fold during folding equal to the lack of reinforcing rib line 3 in the second fold to ensure smooth folding.

[0057] In a specific embodiment, the limiting base 41 is longitudinally provided with multiple pairs of convex column groups arranged at intervals. Each group of convex columns 43 is composed of two symmetrically arranged convex structures on the left and right, and the gap between the two forms a partial limiting groove. The convex columns 43 are evenly distributed along the length direction of the base, and the center lines of each pair of convex columns 43 coincide with the longitudinal center line of the base. The reinforcing rib line 3 sequentially passes through the gaps of each pair of convex columns 43 from top to bottom, and the convex column 43 groups realize the full-course guiding of the rib line through step-by-step limiting. This segmented limiting structure decomposes the long-stroke positioning into multiple short-stroke controls, significantly improving the path stability of the rib line during bending and folding, and avoiding increasing the friction during the movement of the reinforcing rib line 3 due to excessive restraint.

[0058] The limiting member 5 is in the form of a limiting gasket. A through circular hole is provided in the gasket corresponding to the position of the convex column 43, and the diameter of the through hole is slightly larger than the cross-sectional dimension of the convex column 43 to ensure that the convex column 43 can freely pass through the gasket. When the limiting gasket is installed between the base and the limiting cover 42, the convex column 43 vertically passes through the through hole of the gasket, and the gasket realizes lateral positioning through the support of the convex column 43. At the same time, its lower surface contacts the top surface of the reinforcing rib line 3. The vertical pressure applied when the limiting cover 42 is closed is transmitted to the rib line through the gasket. This structure enables the gasket to accurately align with the pressing position of the rib line and eliminates the installation error of the gasket with the convex column 43 as the reference.

[0059] In the first embodiment, the limiting member 5 is provided with multiple through holes for passing screws. The limiting base 41 and the limiting cover 42 are connected by screws. Multiple pressing protrusions for pressing the limiting member 5 can be provided on the inner side surface of the limiting cover 42. Thus, when the limiting cover 42 is fixedly connected to the limiting base 41, the limiting member 5 can be pressed, and the reinforcing rib line 3 can be pressed through the limiting member 5.

[0060] In the second embodiment, the limiting member 5 is provided with multiple through holes for passing screws. The limiting base 41 and the limiting cover 42 are connected by screws. The limiting member 5 can be directly connected to the limiting base 41 by screws to press the reinforcing rib line 3.

[0061] In a specific embodiment, such as Figures 9 to 12As shown in the figure, each display module 1 includes a plurality of display units 111 arranged horizontally. The back sides of the vertical sides of adjacent display units 111 can be rigidly connected through a limit seat 4. Specifically, the limit seat 4 and the display unit 111 can be connected by screws. The limit seat 4 can be provided with a plurality of screw holes at intervals longitudinally. The limit seat 4 transversely straddles the vertical joint of adjacent units, and at the same time, the middle part is aligned with the reinforcing rib line 3 of the load-bearing bar 2. This transverse split design enables a single display module 1 to have unit-level replaceability while maintaining integrity. When a certain display unit 111 fails, it can be disassembled and replaced individually without affecting other parts. The limit seats 4 connecting between adjacent units form a transverse support frame, which together with the load-bearing bar 2 constitutes a cross support structure, significantly improving the planar stiffness and anti-twisting ability of the display screen in the unfolded state. The connection method on the back side of the vertical edge hides the connection structure behind the module, keeping the front of the display flat without protrusions, ensuring seamless splicing of the overall picture after multiple display modules 1 are unfolded.

[0062] In a specific embodiment, a plurality of groups of spaced-apart limit seats 4 are arranged horizontally on the back of each display module 1, and a plurality of reinforcing rib lines 3 are distributed longitudinally on the load-bearing bar 2. Each rib line passes through a row of horizontally arranged limit seats 4. That is, the limit seats 4 are evenly distributed horizontally along the display module 1, forming a longitudinal arrangement array corresponding to the number of rib lines. The reinforcing rib lines 3 extend downward from the top display module 1, and each rib line passes through the limit seats 4 of all the display modules 1 below the corresponding row, constituting a plurality of parallel longitudinal support paths. The multi-row rib lines achieve multi-point support through the constraint of the limit seats 4, dispersing the concentrated stress generated by folding to multiple limit points, effectively reducing the risk of overloading of a single point of force. When the display screen is unfolded, the multi-row rib lines provide planar support synchronously.

[0063] Preferably, as Figures 13 to 17 shown, the reinforcing rib line 3 is made of a steel wire made of high-strength stainless steel, and its upper end is wound around the load-bearing stud 22 at the top of the load-bearing bar 2. The load-bearing stud 22 is vertically installed on the load-bearing bar 2, and specifically, it can be a threaded connection. The end of the steel wire is fixed to the load-bearing stud 22 in a spiral winding manner, and the stable anchoring of the top end of the steel wire is achieved through the locking of the fixing screw 21 and the load-bearing stud 22. This articulated fixing method not only ensures the connection strength of the steel wire when it is longitudinally tensioned, but also allows the steel wire to produce a small amount of elastic deformation when it is folded and bent. The concentrated force at the top fixing point is evenly dispersed to all the limit seats 4 below through the steel wire, forming a tension transmission path from top to bottom. When the display screen is unfolded, the steel wire is in a moderately stretched state, effectively maintaining the planar stiffness of the display module 1; when folding, the bending stress is absorbed through the elastic deformation of the steel wire, preventing the structure from being damaged due to overload.

[0064] The foldable display screen proposed by the present invention is specifically installed in a lifting form. For example, the load-bearing bar is installed on the lifting seat. When the lifting seat rises, it drives the load-bearing bar to rise, and the display screen can be unfolded. When the load-bearing bar is lowered, the display screen can be folded. In addition, the foldable display screen also includes other necessary components, such as the power supply component corresponding to the display screen, etc., which are all conventional technologies that can be directly obtained in this field and are not the focus of the present invention, so they will not be specifically described.

[0065] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] For the sake of convenience in description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper" etc. can be used here to describe the spatial position relationship between a device or feature and other devices or features as shown in the figure. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here will be made.

[0067] In addition, it should be noted that the use of words such as "first", "second" etc. to limit components is only for the convenience of differentiating the corresponding components. Without further declaration, the above words have no special meaning, so it cannot be understood as a limitation on the protection scope of the present invention.

[0068] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A foldable display screen, characterized in that: include: A plurality of display modules, wherein the plurality of display modules are hinged in sequence and folded in sequence from bottom to top, wherein the first display module from bottom to top is folded back to back with the second display module, the second display module is folded face to face with the third display module, and so on to the topmost display module; A load-bearing bar, equipped with a reinforcing rib line, the reinforcing rib line extends from top to bottom and passes through the back side of each display module; A plurality of limit seats, respectively arranged on the back of each display module, for passing through the reinforcing rib line to limit the reinforcing rib line to a position close to the back of the display module; The limiting member is installed in the limiting seat of the odd-numbered display module to press the reinforcing rib line tightly and limit the movement of the reinforcing rib line on the back of the odd-numbered display module.

2. The foldable display screen according to claim 1, characterized in that: The limiting seat includes: a limiting base and a limiting cover, the limiting base is installed on the back of the display module and is provided with a longitudinal limiting groove passing through the reinforcing rib line, and the limiting cover is installed on the limiting base and covers the notch of the limiting groove.

3. The foldable display screen according to claim 2, characterized in that: The limiting member is installed between the limiting base and the limiting cover, and the limiting member is connected to the limiting base to press the limiting rib in the limiting groove, or the limiting cover presses the limiting rib through the limiting member.

4. The foldable display screen according to claim 2, wherein: The limiting base and the limiting cover are in the shape of long strips, and the upper and lower ends are close to the upper and lower ends of the display module, and the distance between the upper end of the limiting base and the upper end of the display module is equal to the distance between the lower end of the limiting base and the lower end of the display module.

5. The foldable display screen according to claim 2, characterized in that: The limiting base is provided with a plurality of pairs of bosses spaced apart from top to bottom, the gap between each pair of the bosses forms the limiting groove, and the reinforcing rib line passes through the gap between each pair of the bosses in sequence from top to bottom.

6. The foldable display screen according to claim 5, characterized in that: The limiting member is a limiting gasket, and a through hole is provided on the limiting gasket at a position corresponding to the convex column.

7. The foldable display screen according to any one of claims 1 to 6, characterized in that: Each of the display modules comprises a plurality of display units arranged transversely, and the back sides of the vertical edges of two adjacent display units are connected via the limiting seats.

8. The foldable display screen according to claim 1, wherein: A plurality of the limiting seats are arranged at intervals on the back of each display module, and a corresponding number of reinforcing rib lines are arranged at intervals along the length direction of the load-bearing bar, and each reinforcing rib line passes through a row of the limiting seats.

9. The foldable display screen according to claim 1, wherein: The load-bearing bar is provided with a load-bearing stud, and the upper end of the reinforcing rib line is wound around the load-bearing stud and fixed by a fixing screw threadedly connected to the load-bearing stud.

10. The foldable display screen according to claim 1, wherein: The reinforcing rib wire is a steel wire.

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