Articulated mechanism and LED display

Abstract

The present invention provides a hinge mechanism and an LED display screen, comprising a hinge body for fixing to a display unit and a connecting piece fixed to the hinge body; a first guide position is provided at one end of the hinge body, and a second guide position corresponding to the first guide position is provided at the other end of the hinge body; the connecting piece is fixed to the second guide position and is used to flexibly connect to the first guide position of another hinge mechanism so as to reduce or increase the angle between two adjacent hinge mechanisms by guiding the movement of the second guide position through the first guide position. The hinge mechanism and LED display screen provided by the present invention fix the hinge mechanism on the display unit so that the LED display screen itself can be bent, increasing the number of bending times of the assembled LED display screen, thereby improving the bending effect of the LED display screen.

Description

Technical Field

[0001] The invention belongs to the technical field of LED display screens, and more specifically, relates to a hinge mechanism and an LED display screen. Background Art

[0002] LED display is a flat-panel display used to display information such as text, images, videos and video signals. Because LED display can be extended arbitrarily, seamlessly assembled, has a long operating time, can use interactive technology, and has good display effects, it is widely used in airports, shopping malls, hotels, high-speed railways, subways, cinemas, exhibitions, office buildings and other places; in order to adapt to different application occasions, curved LED display screens have appeared on the market to improve the display effect.

[0003] One of the bending methods of existing LED display screens on the market is to fix several display units on a box to assemble an LED display screen, and then use the arc lock on the box to change the connection angle of adjacent boxes to realize the assembly between the LED display screens, so as to obtain a curved LED display screen through assembly. However, due to the fixed shape of the box itself, a single LED display screen is not easy to bend, so the curved surface of the arc-assembled LED display screen is obviously block-shaped and angular. When the site for placing the LED display screen is not large, the bending angle of the assembled LED display screen is limited. In addition, due to the large size of a single LED display screen, the bending angle of the assembled LED display screen is not ideal. At the same time, the joints and flatness of the LED display screens cannot be guaranteed. When subjected to gravity, tensile force and other forces, they will be severely deformed and easily misaligned, affecting the display effect. Summary of the invention

[0004] The object of the present invention is to provide a hinge mechanism and an LED display screen to solve the technical problem that the bending shape of the LED display screen is not ideal in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a hinge mechanism, including a hinge body for fixing to a display unit and a connecting member fixed to the hinge body; a first guide position is provided at one end of the hinge body, and a second guide position corresponding to the first guide position is provided at the other end of the hinge body; the connecting member is fixed at the second guide position, and is used to movably connect the first guide position of another hinge mechanism so as to guide the movement of the second guide position through the first guide position to achieve a reduction or increase in the angle between two adjacent hinge mechanisms.

[0006] Further, the first guide position includes a first arc-shaped hole, the second guide position is provided with a first connecting hole, and the connecting member includes a first connecting pin; the first connecting pin is used to pass through the first connecting hole and the first arc-shaped hole of another hinge mechanism and connect two adjacent hinge mechanisms; the movement of the second guide position is guided by the first arc-shaped hole of another hinge mechanism so that the angle between the two adjacent hinge mechanisms is reduced or increased; and / or

[0007] The first guide position includes a recessed guide position; the second guide position includes a boss adapted to the recessed guide position; the boss is used to extend into the recessed guide position of another hinge mechanism; the movement of the boss is guided by the recessed guide position of another hinge mechanism so that the angle between two adjacent hinge mechanisms is reduced or increased.

[0008] Furthermore, the first guide position further includes a second arc-shaped hole, the second guide position further includes a second connecting hole, and the connecting member further includes a second connecting pin;

[0009] The second connecting pin is used to pass through the second connecting hole and the second arc-shaped hole of another hinge mechanism and connect two adjacent hinge mechanisms;

[0010] The first arc-shaped hole and the second arc-shaped hole are located on the same arc line.

[0011] Further, the first arc-shaped hole limits one of the hinge mechanisms from bending arbitrarily within ±10° relative to the other hinge mechanism; and / or

[0012] The second arc-shaped hole limits any bending of one of the hinge mechanisms relative to the other hinge mechanism within ±10°.

[0013] Further, the recessed guide position includes a first guide groove and a second guide groove, the boss includes a first convex block and a second convex block, the first convex block is used to extend into the first guide groove of another hinge mechanism, and the second convex block is used to extend into the second guide groove of another hinge mechanism;

[0014] The first connecting hole and the second connecting hole are located on the first protrusion, and the ends of the first connecting pin and the second connecting pin are fixed on the second protrusion; a gap is provided between the first protrusion and the second protrusion for accommodating the first guide position of the other hinge mechanism, so that the first arc hole and the second arc hole of the other hinge mechanism are both located between the first protrusion and the second protrusion.

[0015] Furthermore, the first guide position also includes a third protrusion; the third protrusion is used to extend between the first protrusion and the second protrusion of the other hinge mechanism, and the first arc-shaped hole and the second arc-shaped hole are both provided on the third protrusion.

[0016] Furthermore, the second guide position also includes a third guide groove adapted to the third protrusion; the third guide groove is used for allowing the third protrusion of the other hinge mechanism to extend into and guide the movement of the third protrusion.

[0017] Furthermore, the second arc-shaped hole is arranged at the bottom of the first guide groove.

[0018] The present invention also provides an LED display screen, comprising a plurality of display units and a plurality of hinge mechanisms as described in any of the aforementioned technical solutions; each of the display units is provided with at least one hinge mechanism; adjacent hinge mechanisms of adjacent display units are movably connected so that adjacent display units are movably connected.

[0019] Furthermore, the upper end and the lower end of the display unit are each provided with a hinge mechanism;

[0020] The LED display screen further comprises at least one fixed cover; each fixed cover is used to connect two hinge mechanisms on one display unit so as to make the two hinge mechanisms move synchronously.

[0021] The beneficial effects of the hinge mechanism and LED display screen provided by the present invention are as follows: compared with the prior art, the connecting piece of the hinge mechanism of the present invention flexibly connects the second guide position of one hinge mechanism with the first guide position of another hinge mechanism, and then guides the second guide position of another hinge mechanism to move through the first guide position of one hinge mechanism so as to reduce or increase the angle between two adjacent hinge mechanisms. After multiple hinge mechanisms are guided to be hinged, the influence of the edges and corners formed by the bending of adjacent hinge mechanisms on the overall bending shape can be reduced, so that the overall shape is close to an arc; the hinge mechanism is fixedly connected to the display unit correspondingly, and the multiple hinge mechanisms after bending and guiding the hinge are bent so that the display unit bends relative to another adjacent display unit as the hinge mechanism moves, so that the overall shape of the LED display screen assembled by the multiple display units is closer to an arc, thereby improving the LED display screen. The display effect has more bending times and better bending effect than the existing assembled LED display screen. Since the first guide position of a hinge mechanism has a guiding effect on the movement of the second guide position of another hinge mechanism, the second guide position of one hinge mechanism cannot move arbitrarily relative to the first guide position of the other hinge mechanism, and can only move along the guiding direction of the first guide position of the other hinge mechanism. When the second guide position moves along other directions except the guiding direction of the first guide position of the other hinge mechanism, the first guide position of the other hinge mechanism can limit the second guide position. Therefore, after fixing the two display units at both ends of the assembled multiple display units, no other limiting structures are needed, and the hinge mechanisms of the entire LED display screen can limit and lock each other, thereby ensuring that the overall shape of the assembled LED display screen can be arc-shaped without deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of the positive bending of two hinge mechanisms provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of the reverse bending of two hinge mechanisms provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of an LED display screen provided by an embodiment of the present invention.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. hinge mechanism; 11. hinge body;

[0028] 111, first guide position;

[0029] 1111, recessed guide position; 11111, first guide groove; 11112, second guide groove;

[0030] 1112, first arc-shaped hole; 1113, second arc-shaped hole; 1114, third protrusion;

[0031] 112, second guide position; 1121, boss; 11211, first convex block; 11212, second convex block;

[0032] 1122, first connection hole; 1123, second connection hole;

[0033] 12. Connecting member; 121. First connecting pin; 122. Second connecting pin;

[0034] 2. Display unit; 3. Fixed cover. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] 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 two or more, unless otherwise clearly and specifically defined.

[0039] Please also read Figure 1 and Figure 2 Now, the hinge mechanism provided by the present invention is described. The hinge mechanism comprises a hinge body 11 for fixing to the display unit 2 and a connecting member 12 fixed to the hinge body 11; a first guide position 111 is provided at one end of the hinge body 11, and a second guide position 112 corresponding to the first guide position 111 is provided at the other end of the hinge body 11; the connecting member 12 is fixed to the second guide position 112 and is used to movably connect the first guide position 111 of another hinge mechanism 1 so as to reduce or increase the angle between two adjacent hinge mechanisms 1 by guiding the movement of the second guide position 112 through the first guide position 111.

[0040] Compared with the prior art, the hinge mechanism provided by the present invention has a connecting piece 12 that movably connects the second guide position 112 of one hinge mechanism 1 with the first guide position 111 of another hinge mechanism 1, and then guides the second guide position 112 of another hinge mechanism 1 to move through the first guide position 111 of one hinge mechanism 1 so as to reduce or increase the angle between two adjacent hinge mechanisms 1. After multiple hinge mechanisms 1 are guided to be hinged, the influence of the edges and corners formed by the movement and bending of adjacent hinge mechanisms 1 on the overall bending shape can be reduced, so that the overall shape is close to an arc; the hinge mechanism 1 is fixedly connected to the display unit 2 correspondingly, and the multiple hinge mechanisms 1 are hinged through the bending guide so that the display unit 2 moves with the hinge mechanism 1 and bends relative to another adjacent display unit 2, so that the overall shape of the LED display screen composed of the multiple display units 2 is closer to an arc, thereby improving the display effect of the LED display screen, and compared with the existing assembled LED display screen, the LED display screen is more convenient to manufacture. D display screen has more bending times and better bending effect; since the first guide position 111 of one hinge mechanism 1 has a guiding effect on the movement of the second guide position 112 of another hinge mechanism 1, the second guide position 112 of one hinge mechanism 1 cannot move arbitrarily relative to the first guide position 111 of the other hinge mechanism 1, and can only move along the guiding direction of the first guide position 111 of the other hinge mechanism 1. When the second guide position 112 moves along other directions except the guiding direction of the first guide position 111 of the other hinge mechanism 1, the first guide position 111 of the other hinge mechanism 1 can limit the second guide position 112, so that after fixing the two display units at both ends of the assembled multiple display units 2, no other limiting structure is needed, and the hinge mechanisms 1 of the entire LED display screen can limit and lock each other, ensuring that the overall shape of the assembled LED display screen can be arc-shaped without deformation.

[0041] Optionally, the first guide position 111 includes a first arc-shaped hole 1112, and the second guide position 112 is provided with a first connecting hole 1122; the connecting member 12 includes a first connecting pin 121; the first connecting pin 121 is used to pass through the first connecting hole 1122 and the first arc-shaped hole 1112 of another hinge mechanism 1 and connect two adjacent hinge mechanisms 1;

[0042] The movement of the second guide position 112 is guided by the first arc hole 1112 of the other hinge mechanism 1, so that the angle between the two adjacent hinge mechanisms 1 is reduced or increased; the first connecting pin 121 moves in the first arc hole 1112, and drives the second guide position 112 to rotate relative to the first guide position 111 of the other hinge mechanism 1; thereby, the bending of the two adjacent hinge mechanisms 1 is guided by the first arc hole 1112, thereby improving the rotation accuracy of the hinge mechanism 1; the structure is simple and the connection is convenient.

[0043] Optionally, the first guide position 111 includes a recessed guide position 1111; the second guide position 112 includes a boss 1121 adapted to the recessed guide position 1111; the boss 1121 is used to extend into the recessed guide position 1111 of another hinge mechanism 1;

[0044] The movement of the boss 1121 is guided by the recessed guide position 1111 of another hinge mechanism 1, so that the angle between two adjacent hinge mechanisms 1 is reduced or increased; the recessed guide position 1111 guides the movement of the boss 1121 of another hinge mechanism 1, thereby guiding the bending of the two adjacent hinge mechanisms 1 and improving the rotation accuracy of the hinge mechanism 1.

[0045] Specifically, the first guide position also includes a limit groove; the connecting piece is fixed to the boss, and the connecting piece is slidably arranged in the limit groove of another hinge mechanism, and the limit groove limits the sliding limit of the connecting piece and thus limits the activity limit of the arc-shaped protrusion; preventing the boss from sliding out of the recessed guide position of another hinge mechanism.

[0046] Alternatively, if Figure 1 and Figure 2 As shown, the first guide position 111 includes a recessed guide position 1111 and a first arc-shaped hole 1112, the second guide position 112 includes a first connecting hole 1122 and a boss 1121 adapted to the recessed guide position 1111, and the connecting member 12 includes a first connecting pin 121;

[0047] The first connecting pin 121 is used to pass through the first connecting hole 1122 and the first arc-shaped hole 1112 of another hinge mechanism 1 and connect two adjacent hinge mechanisms 1;

[0048] The movement of the second guide position 112 is guided by the first arc hole 1112 of another hinge mechanism 1, so that the angle between two adjacent hinge mechanisms 1 is reduced or increased;

[0049] The boss 1121 is used to extend into the recessed guide position 1111 of another hinge mechanism 1; the movement of the boss 1121 is guided by the recessed guide position 1111 of another hinge mechanism 1 so as to reduce or increase the angle between two adjacent hinge mechanisms 1; through the dual limiting guidance of the first arc hole 1112 and the recessed guide position 1111 to the second guide position 112 of another hinge mechanism 1, the guiding accuracy of the first guide position 111 to the second guide position 112 of the other hinge mechanism 1 is further improved, and the second guide position 112 of one hinge mechanism 1 is prevented from being misaligned with the first guide position 111 of another hinge mechanism 1, so that the precision of the spliced ​​arc is more accurate, and it is also convenient for the second guide position 112 of one hinge mechanism 1 and the first guide position 111 of another hinge mechanism 1 to limit and lock each other to avoid shaking.

[0050] Please also refer to Figure 1 and Figure 2 As a specific embodiment of the hinge mechanism provided by the present invention, the first guide position 111 further includes a second arc hole 1113, the second guide position 112 further includes a second connecting hole 1123, and the connecting member 12 further includes a second connecting pin 122;

[0051] The second connecting pin 122 is used to pass through the second connecting hole 1123 and the second arc hole 1113 of another hinge mechanism 1 and connect two adjacent hinge mechanisms 1; the connection strength between the second guide position 112 of one hinge mechanism 1 and the first guide position 111 of another hinge mechanism 1 is improved, and the influence of external force impact, wear and other factors on the first connecting pin 121 and the second connecting pin 122 is reduced, thereby improving the service life of the hinge mechanism 1;

[0052] The first arc hole 1112 and the second arc hole 1113 are located on the same arc line; so that the movement trajectory of the first connecting pin 121 of one hinge mechanism 1 in the first arc hole 1112 of another hinge mechanism 1 and the movement trajectory of the second connecting pin 122 of one hinge mechanism 1 in the second arc hole 1113 of another hinge mechanism 1 are located on the same arc line, and the first connecting pin 121 of another hinge mechanism 1 is guided and limited by the hole wall of the first arc hole 1112 of one hinge mechanism 1, and the second connecting pin 122 of another hinge mechanism 1 is guided and limited by the hole wall of the second arc hole 1113 of one hinge mechanism 1, so as to realize the limiting guidance of the first guiding position 111 of one hinge mechanism 1 to the second guiding position 112 of another hinge mechanism 1; at the same time The first arc hole 1112 and the second arc hole 1113 are arranged along the movement trajectory direction of the first connecting pin 121. Therefore, compared with other schemes (for example, the first hinge plate and the second hinge plate are respectively arranged at both ends of the connection length direction of the hinge mechanism, a circular hole and an arc hole are arranged along the width direction of the first hinge plate, and two circular holes are arranged along the width direction of the second hinge plate, and a pin shaft passes through the circular hole of the first hinge plate on one hinge mechanism and the corresponding circular hole of the second hinge plate on another adjacent hinge mechanism, and another pin shaft passes through the circular hole of the first hinge plate and the corresponding arc hole of the second hinge plate to hinge the two adjacent hinge mechanisms), the thickness of the hinge mechanism 1 is reduced, thereby reducing the thickness of the LED display screen, which is convenient for users to use.

[0053] Specifically, the first arc-shaped hole 1112 limits the maximum positive bending angle of one hinge mechanism 1 relative to another hinge mechanism 1 to 10° and the maximum reverse bending angle to 10°; and / or,

[0054] The second arc hole 1113 limits the maximum positive bending angle of one hinge mechanism 1 relative to the other hinge mechanism 1 to 10° and the maximum reverse bending angle to 10°; when one hinge mechanism 1 is bent forwardly relative to the other hinge mechanism 1, the angle between the two adjacent hinge mechanisms 1 decreases; when one hinge mechanism 1 is bent reversely relative to the other hinge mechanism 1, the angle between the two adjacent hinge mechanisms 1 increases; it ensures that one hinge mechanism 1 and the other hinge mechanism 1 can be bent at multiple angles, so that the LED display screen can be bent into a variety of arcs, and it can also avoid the bending angle being too large, which will increase the gap between adjacent display units 2 and affect the display effect.

[0055] Please also refer to Figure 1 and Figure 2As a specific embodiment of the hinge mechanism provided by the present invention, the recessed guide position 1111 includes a first guide groove 11111 and a second guide groove 11112, and the boss 1121 includes a first convex block 11211 and a second convex block 11212, the first convex block 11211 is used to extend into the first guide groove 11111 of another hinge mechanism 1, and the second convex block 11212 is used to extend into the second guide groove 11112 of another hinge mechanism 1;

[0056] The first connecting hole 1122 and the second connecting hole 1123 are located on the first protrusion 11211, and the ends of the first connecting pin 121 and the second connecting pin 122 are fixed on the second protrusion 11212. A gap is provided between the first protrusion 11211 and the second protrusion 11212 for accommodating the first guide position 111 of another hinge mechanism 1, so that the first arc hole 1112 and the second arc hole 1113 of the other hinge mechanism 1 are located between the first protrusion 11211 and the second protrusion 11212; it is convenient for the second guide position 112 of one hinge mechanism 1 and the first guide position 111 of another hinge mechanism 1 to be connected. The connection can reduce the volume of the hinge mechanism 1 and make the second guide position 112 of one hinge mechanism 1 more firmly connected to the first guide position 111 of the other hinge mechanism 1; the first arc hole 1112 and the second arc hole 1113 of one hinge mechanism 1 are located between the first protrusion 11211 and the second protrusion 11212 of the other hinge mechanism 1, so that the first protrusion 11211 and the second protrusion 11212 of one hinge mechanism 1 can limit the first guide position 111 of the other hinge mechanism 1, thereby preventing one hinge mechanism 1 from detaching from the other hinge mechanism 1 along the axial direction of the first connecting pin 121; and also preventing installation misalignment.

[0057] Specifically, the ends of the first connecting pin 121 and the second connecting pin 122 are both provided with threads, and the second protrusion 11212 is provided with a threaded hole. The ends of the first connecting pin 121 and the second connecting pin 122 can be inserted into the threaded hole and threadedly connected to the second protrusion 11212; the connection is firm, the structure is simple, and it is easy to install and maintain.

[0058] Please also refer to Figure 1 and Figure 2 As a specific embodiment of the hinge mechanism provided by the present invention, the first guide position 111 also includes a third protrusion 1114; the third protrusion 1114 is used to extend between the first protrusion 11211 and the second protrusion 11212 of another hinge mechanism 1, and the first arc hole 1112 and the second arc hole 1113 are both arranged on the third protrusion 1114, which reduces the volume of the first guide position 111, reduces the production cost of the hinge mechanism 1, and facilitates the connection between the first guide position 111 of one hinge mechanism 1 and the second guide position 112 of another hinge mechanism 1.

[0059] Furthermore, as a specific embodiment of the hinge mechanism provided by the present invention, the second guide position 112 also includes a third guide groove adapted to the third protrusion 1114; the third guide groove is used for the third protrusion 1114 of another hinge mechanism 1 to extend into and guide the movement of the third protrusion 1114; the third guide groove guides the movement of the third protrusion 1114 of another hinge mechanism 1, further improving the guiding accuracy of the first guide position 111 to the second guide position 112 of the other hinge mechanism 1; it also reduces the volume of the hinge mechanism 1, and occupies less space when two adjacent hinge mechanisms 1 are connected.

[0060] Please also refer to Figure 1 and Figure 2 As a specific embodiment of the hinge mechanism provided by the present invention, the second arc-shaped hole 1113 is arranged at the bottom of the first guide groove 11111; so as to shorten the length of the first guide position 111, thereby reducing the influence of the hinge mechanism 1 as an edge on the overall shape of the assembled multiple hinge mechanisms 1, making the overall shape closer to an arc, and at the same time increasing the bending angle of the adjacent hinge mechanisms 1.

[0061] See also Figure 3 The present invention also provides an LED display screen, comprising a plurality of display units 2 and a plurality of hinge mechanisms 1 as described in any of the aforementioned embodiments; at least one hinge mechanism 1 is fixedly provided on each display unit 2; adjacent hinge mechanisms 1 on adjacent display units 2 are movably connected to enable adjacent display units 2 to be movably connected.

[0062] Compared with the prior art, the LED display screen provided by the present invention fixes the hinge mechanism 1 on the display unit 2, so that a single LED display screen itself can be bent, and multiple display units 2 can be assembled by assembling multiple hinge mechanisms 1, so that the display unit 2 moves with the hinge mechanism 1, and the curvature of the overall shape of the LED display screen composed of multiple display units 2 can be changed, thereby improving the integrity of the LED display screen, improving the display effect of the LED display screen, and enhancing the user experience.

[0063] Specifically, the hinge mechanism 1 is detachably connected to the display unit 2; when the hinge mechanism 1 is damaged, only the hinge mechanism 1 needs to be replaced, and there is no need to replace the display unit 2 as a whole, thereby reducing maintenance costs.

[0064] Specifically, a hinge mechanism 1 is provided at the upper end and the lower end of the display unit 2;

[0065] The LED display screen also includes at least one fixed cover 3; each fixed cover 3 is used to connect two hinge mechanisms 1 on a display unit 2; so that the two hinge mechanisms 1 move synchronously; increase the stability and consistency of the bending of adjacent display units 2, and avoid inconsistent bending degrees at the upper and lower ends of the LED display screen.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Articulated mechanism, characterized in that: The hinge mechanism comprises a hinge body for fixing to a display unit and a connecting member fixed to the hinge body; a first guide position is provided at one end of the hinge body, and a second guide position corresponding to the first guide position is provided at the other end of the hinge body; the connecting member is fixed to the second guide position and is used to movably connect to the first guide position of another hinge mechanism so as to guide the movement of the second guide position through the first guide position to realize the reduction or increase of the angle between two adjacent hinge mechanisms; The first guide position includes a first arc-shaped hole, the second guide position is provided with a first connecting hole, and the connecting member includes a first connecting pin; the first connecting pin is used to pass through the first connecting hole and the first arc-shaped hole of another hinge mechanism and connect two adjacent hinge mechanisms; the movement of the second guide position is guided by the first arc-shaped hole of another hinge mechanism, so that the angle between the two adjacent hinge mechanisms is reduced or increased; The first guide position includes a recessed guide position; the second guide position includes a boss adapted to the recessed guide position; the boss is used to extend into the recessed guide position of another hinge mechanism; the movement of the boss is guided by the recessed guide position of another hinge mechanism, so that the angle between two adjacent hinge mechanisms is reduced or increased; The first guide position further includes a second arc-shaped hole, the second guide position further includes a second connecting hole, and the connecting member further includes a second connecting pin; The second connecting pin is used to pass through the second connecting hole and the second arc-shaped hole of another hinge mechanism and connect two adjacent hinge mechanisms; The first arc-shaped hole and the second arc-shaped hole are located on the same arc line; The first arc-shaped hole limits any bending of one of the hinge mechanisms relative to the other hinge mechanism within ±10°; and / or The second arc-shaped hole limits one of the hinge mechanisms from bending arbitrarily within ±10° relative to the other hinge mechanism; The recessed guide position includes a first guide groove and a second guide groove, and the boss includes a first convex block and a second convex block, wherein the first convex block is used to extend into the first guide groove of another hinge mechanism, and the second convex block is used to extend into the second guide groove of another hinge mechanism; The first connecting hole and the second connecting hole are located on the first protrusion, and the ends of the first connecting pin and the second connecting pin are fixed on the second protrusion; a gap is provided between the first protrusion and the second protrusion for accommodating the first guide position of the other hinge mechanism, so that the first arc hole and the second arc hole of the other hinge mechanism are both located between the first protrusion and the second protrusion.

2. The hinge mechanism according to claim 1, characterized in that: The first guide position further includes a third protrusion; the third protrusion is used to extend between the first protrusion and the second protrusion of the other hinge mechanism, and the first arc-shaped hole and the second arc-shaped hole are both arranged on the third protrusion.

3. The hinge mechanism according to claim 2, characterized in that: The second guide position also includes a third guide groove adapted to the third protrusion; the third guide groove is used for the third protrusion of another hinge mechanism to extend into and guide the movement of the third protrusion.

4. The hinge mechanism according to claim 1, characterized in that: The second arc-shaped hole is arranged at the bottom of the first guide groove.

5. An LED display screen, comprising a plurality of display units, characterized in that: It also includes a plurality of hinge mechanisms as described in any one of claims 1 to 4; each of the display units is provided with at least one hinge mechanism; and adjacent hinge mechanisms of adjacent display units are movably connected so that adjacent display units are movably connected.

6. The LED display screen according to claim 5, characterized in that: The upper end and the lower end of the display unit are each provided with a hinge mechanism; The LED display screen further comprises at least one fixed cover; each fixed cover is used to connect two hinge mechanisms on one display unit so as to make the two hinge mechanisms move synchronously.

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