Hinge module and LED display device

Abstract

The utility model discloses a hinge module and an LED display device, and relates to the technical field of LED display devices.The hinge module comprises a first hinge block and a second hinge block, the first hinge block comprises a first hinge body, guide hooks are arranged at the two ends of the first hinge body in the length direction, and the second hinge block comprises a second hinge body; the two ends, in the length direction, of the second hinge body are each provided with a guide groove body, and the first hinge body and the second hinge body slide relatively through guide matching of the guide hooks and the corresponding guide groove bodies. Therefore, the hinge module is controlled to be freely adjusted within a certain radian range through the relative sliding distance of the first hinge body and the second hinge body. According to the hinge module, the arc adjusting requirement of the LED display device is met, operation is easy, convenient and fast, meanwhile, the arc display effect is improved, and in addition, the problem that the production cost of the whole arc LED display device is high is solved.

Description

Technical Field

[0001] The present application relates to the technical field of LED display devices, and in particular to a hinge module and an LED display device. Background Art

[0002] LED display device is an innovative display device that can realize different forms of display such as flat, right-angle, and curved surfaces, thus bringing unprecedented design flexibility and wide applicability to display technology. It has broad application prospects in indoor, outdoor, stage, advertising and other fields.

[0003] In the related art, the LED display device is mainly formed by assembling at least two single-box screens. When the LED display device is subjected to arc adjustment operation, the angle locks provided on the sides of the two boxes are spliced ​​and adjusted to corresponding angles so that the two boxes are at a certain angle. In this way, the arc adjustment operation of the LED display device is achieved by changing the connection angles of adjacent boxes, thereby obtaining an LED display device with a preset arc shape.

[0004] However, in the process of realizing arc adjustment of LED display device, it is found that there are at least the following problems:

[0005] First, due to the fixed shape of the cabinet itself, the single-cabinet screen is not easy to bend, and the arc angle of the single-cabinet screen is small, which makes it difficult to meet the arc adjustment requirements of the LED display device;

[0006] Secondly, the arc transition of the whole screen using the above-mentioned cabinet and angle lock is stiff, the edges are obvious, and the seams and flatness between the single-cabinet screens cannot be guaranteed, affecting the display effect;

[0007] Third, the processing precision requirements for the box body and the angle lock are high, resulting in high production costs for the entire curved LED display device.

[0008] Therefore, it is necessary for those skilled in the art to provide a hinge module and an LED display device having the hinge module that can enable the curved surface of a single-box screen to have a large adjustment angle range, good curved surface display effect and low production cost. Utility Model Content

[0009] The purpose of this application is to provide a hinge module and an LED display device, which can enable the curved surface of a single-box screen to have a large adjustment angle range, good curved surface display effect and low production cost.

[0010] To achieve the above-mentioned purpose, the present application provides a hinge module for connecting an LED display module, the hinge module including a first hinge block and a second hinge block, the first hinge block including a first hinge body, and guide hooks are provided at both ends of the first hinge body along the length direction, the second hinge block including a second hinge body, and guide grooves are provided at both ends of the second hinge body along the length direction, the guide hooks can be movably embedded in the corresponding guide grooves, and the guide grooves are used to guide the movement of the guide hooks so that the guide hooks can move between the first position and the second position to adjust the angle between the first hinge block and the second hinge block.

[0011] In some embodiments, the second hinge block also includes a limit block, which is installed on the second hinge body. The guide hook is configured to be able to move between the first position and the second position under the limiting action of the corresponding guide groove bottom and the limit block.

[0012] In some embodiments, the limit block includes a first limit protrusion, the first limit protrusion is arranged in the corresponding guide groove body, and a second limit protrusion is provided at the end of the guide hook away from the first hinge body. The second limit protrusion and the first limit protrusion contact and abut against each other to limit the guide hook from moving in a direction away from the corresponding groove bottom.

[0013] In some embodiments, the first limiting protrusion is provided at the slot position of the corresponding guide slot body, so that the slot is limited to be able to prevent the guide hook from escaping from the corresponding guide slot body.

[0014] In some embodiments, the second hinge body is provided with a receiving groove, the receiving groove being in communication with the corresponding guide groove body, and the receiving groove is used to receive at least a portion of the structure of the limit block;

[0015] The limiting block is provided with a through hole, and the second hinge body is also provided with a connecting hole, which is located in the accommodating groove. The second hinge block also includes a connecting piece, which passes through the through hole and is connected to the corresponding connecting hole, so that the limiting block is fixed on the corresponding second hinge body.

[0016] In some embodiments, the second hinge block further includes a cover plate, which is detachably connected to the second hinge body and is used to cover the guide groove on the second hinge body.

[0017] In some embodiments, the cover plate includes two covering plates and a narrowing body arranged between the two covering plates. The two covering plates respectively cover the top of the two guide groove bodies. The width of the narrowing body is smaller than the covering plates to reduce weight and avoid the positioning pin on the second hinge body.

[0018] In some embodiments, a pair of guide hooks are provided at both ends of the first hinge body along the length direction, and the two pairs of guide hooks are symmetrically distributed about the central axis of the first hinge body;

[0019] A pair of guide grooves are provided at both ends of the second hinge body along the length direction, and the two pairs of guide grooves are symmetrically distributed about the central axis of the second hinge body.

[0020] In some embodiments, the hinge module includes a plurality of first hinge blocks and a plurality of second hinge blocks, the number of first hinge blocks is one less than the number of second hinge blocks, and a first hinge block is set between any two adjacent second hinge blocks; or the number of first hinge blocks is one more than the number of second hinge blocks, and a second hinge block is set between any two adjacent first hinge blocks.

[0021] The present application also provides an LED display device, including a box and multiple LED display modules, the multiple LED display modules are hinged to each other to form a display panel, the box includes two frame modules, and also includes any of the above hinge modules, two hinge modules are provided, the two ends of the display panel are respectively connected to the two hinge modules, and the two frame modules are respectively connected to the two sides of the two hinge modules.

[0022] Compared with the above-mentioned background technology, the hinge module provided in the embodiment of the present application includes a first hinge block and a second hinge block. The first hinge block includes a first hinge body, and guide hooks are provided at both ends of the first hinge body along the length direction. The second hinge block includes a second hinge body, and guide grooves are provided at both ends of the second hinge body along the length direction. The guide hooks and the corresponding guide grooves are used to guide the first hinge body and the second hinge body to slide relative to each other, thereby controlling the arbitrary adjustment of the hinge module within a certain arc range through the relative sliding distance of the first hinge body and the second hinge body.

[0023] In this way, compared with the traditional setting of splicing multiple single-box screens and realizing the arc adjustment operation of the LED display device by changing the connection angle of adjacent boxes, the beneficial effects brought by the hinge module adopted in this application mainly include:

[0024] First, a hinge module consisting of relatively sliding hinge blocks is used, and the relative sliding distance between the hinge blocks is used to control the arbitrary adjustment of the display screen within a large arc range, meeting the arc adjustment requirements of the LED display device.

[0025] Secondly, the LED display device of the present application does not require the use of multiple box splicing. When adjusting the arc, it is only necessary to adjust the relative sliding distance between the hinge blocks. There is no need for complicated splicing and arc adjustment operations. The operation is simple, convenient and fast. At the same time, the entire screen has no seams, making the arc surface of the screen more natural and the transition even and delicate, thereby improving the arc display effect, increasing the operability and product experience of the product, and having more advantages in market competition.

[0026] Third, the guiding coordination of guide hooks and corresponding guide grooves replaces the traditional method of splicing using angle locks on the side of the box. This not only has a large arc adjustment range and high flexibility, but also solves the problem of high production costs of the entire curved LED display device due to high processing precision requirements for the box and angle locks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0028] Figure 1 This is a schematic diagram of the assembly of a hinge module and multiple LED display modules in an embodiment of the present application;

[0029] Figure 2 for Figure 1 A schematic structural diagram of the first hinge block in the hinge module shown;

[0030] Figure 3 for Figure 1 A schematic structural diagram of the second hinge block in the hinge module shown;

[0031] Figure 4 for Figure 3 A schematic diagram of the internal structure of the second hinge block is shown;

[0032] Figure 5 This is a schematic diagram of a state where the arc of the hinge module is 0 degrees in an embodiment of the present application;

[0033] Figure 6 This is a schematic diagram of the hinge module in an embodiment of the present application, showing an inner arc of 45 degrees;

[0034] Figure 7 This is a schematic diagram of the hinge module in an embodiment of the present application, showing an outer arc of 45 degrees;

[0035] Figure 8 This is a schematic diagram of the hinge module in an S-shaped state in an embodiment of the present application;

[0036] Figure 9 This is an exploded view of the LED display device in the embodiment of the present application;

[0037] Figure 10 This is a schematic diagram of a state where the arc of the LED display device in the embodiment of the present application is 0 degrees;

[0038] Figure 11This is a schematic diagram of the LED display device in an embodiment of the present application in a state where the inner arc is 45 degrees;

[0039] Figure 12 This is a schematic diagram of the LED display device in an embodiment of the present application in a state where the outer arc is 45 degrees;

[0040] Figure 13 This is a schematic diagram of the LED display device in an S-shaped state in an embodiment of the present application.

[0041] in:

[0042] 10-hinge module;

[0043] 11-first hinge block, 111-first hinge body, 112-guide hook, 1121-second limiting protrusion;

[0044] 12-second hinge block, 121-second hinge body, 122-guide groove, 1221-notch, 1222-groove bottom, 123-limiting block, 1231-first limiting protrusion, 124-accommodating groove, 125-connecting member, 126-cover plate, 1261-cover plate, 1262-narrowing body;

[0045] 20-LED display module;

[0046] 30- box body, 31- frame module;

[0047] 40-Central control box module. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0050] See also Figures 1 to 4 The hinge module 10 provided in the embodiment of the present application is used to connect the LED display module 20. The hinge module 10 includes a first hinge block 11 and a second hinge block 12. The first hinge block 11 includes a first hinge body 111, and the first hinge body 111 has guide hooks 112 at both ends along the length direction. The second hinge block 12 includes a second hinge body 121, and the second hinge body 121 has guide grooves 122 at both ends along the length direction.

[0051] Among them, the guide hook 112 can be movably embedded in the corresponding guide groove body 122, and the guide groove body 122 is used to guide the movement of the guide hook 112, so that the guide hook 112 can move between the first position and the second position to adjust the angle between the first hinge block 11 and the second hinge block 12.

[0052] It should be noted that the above-mentioned first position and second position can be limited by the structure of the guide groove body 122. According to the actual arc adjustment needs, when each guide hook 112 is in the first position, the hinge module 10 can be in an inner arc state of 45 degrees. When each guide hook 112 is in the second position, the hinge module 10 can be in an outer arc state of 45 degrees.

[0053] In this way, the hinge module 10 can be adjusted within an arc range of +45 degrees to -45 degrees. Figure 5 , the curvature of the hinge module 10 can be 0 degrees, at which time the hinge module 10 is in a straight state; for example, please refer to Figure 6 , the hinge module 10 can be in an inner arc of 45 degrees, at this time the hinge module 10 is concave inwardly, and the arc is 45 degrees; for example, please refer to Figure 7 , the hinge module 10 can be in an outer arc of 45 degrees, at this time the hinge module 10 is concave to the outside, and the arc is 45 degrees; for example, please refer to Figure 8 The hinge module 10 can be in the state of +45 degrees to the left and -45 degrees to the right (inner arc 45 degrees + outer arc 45 degrees), and at this time the hinge module 10 is S-shaped.

[0054] Of course, according to actual arc adjustment needs, when the guide hook 112 is in the first position and the second position, the arc of the hinge module 10 can also be appropriately increased or decreased, and is not limited to 45 degrees.

[0055] It can be seen that the first hinge body 111 and the second hinge body 121 can slide relative to each other through the guiding cooperation of the guide hook 112 and the corresponding guide groove 122, so that the hinge module 10 can be arbitrarily adjusted within a certain arc range by controlling the relative sliding distance between the first hinge body 111 and the second hinge body 121.

[0056] In this way, compared with the traditional setting of splicing multiple single-box 30 screens and realizing the arc adjustment operation of the LED display device by changing the connection angle of adjacent boxes 30, the hinge module 10 adopted in this application adopts a hinge module 10 composed of relatively sliding hinge blocks, and uses the relative sliding distance between the hinge blocks to control the arbitrary adjustment of the display screen within a larger arc range, which meets the arc adjustment requirements of a single box 30 of the LED display device. When adjusting the arc, the LED display device using the above-mentioned hinge module 10 only needs to adjust the relative sliding distance between the hinge blocks to realize the arc adjustment of the single box 30 itself, without the need for complicated splicing and arc adjustment operations. It is simple, convenient and fast to operate. At the same time, the entire screen has no seams, which makes the arc surface of the screen more natural and the transition is uniform and delicate, thereby improving the arc display effect, increasing the operability and product experience of the product, and having more advantages in market competition. In addition, the guiding cooperation method of the guide hook 112 and the corresponding guide groove 122 replaces the traditional method of splicing using the angle lock on the side of the box 30. It not only has a large arc adjustment range and high flexibility, but also solves the problem of high production cost of the entire arc-shaped LED display device due to the high processing precision requirements of the box 30 and the angle lock.

[0057] In some embodiments, to facilitate the movement of the guide hook 112 between the first position and the second position, the second hinge block 12 also includes a limit block 123, which is installed on the second hinge body 121. The guide hook 112 is configured to be able to move between the first position and the second position under the limiting action of the groove bottom 1222 of the corresponding guide groove body 122 and the limit block 123.

[0058] Specifically, the guide groove body 122 is arc-shaped. Generally speaking, the length of the guide groove body 122 determines the curvature adjustment range of the LED display device where the hinge module 10 is located. When the guide hook 112 contacts the corresponding groove bottom 1222 of the guide groove body 122, the guide hook 112 reaches the first position, which is the first limit position of the curvature adjustment range; when the guide hook 112 contacts the corresponding limit block 123, the guide hook 112 reaches the second position, which is the second limit position of the curvature adjustment range.

[0059] In this way, under the limiting action of the guide groove body 122 and the limiting block 123 , the travel of the guide hook 112 can be limited between the first position and the second position.

[0060] In this embodiment, the limit block 123 includes a first limit protrusion 1231, which is arranged in the corresponding guide groove body 122, and a second limit protrusion 1121 is provided at the end of the guide hook 112 away from the first hinge body 111. The second limit protrusion 1121 and the first limit protrusion 1231 contact and abut against each other to limit the guide hook 112 from moving in the direction of the groove bottom 1222 away from the corresponding guide groove body 122.

[0061] That is to say, the guide hook 112 is limited by the contact and cooperation between the first limiting protrusion 1231 and the second limiting protrusion 1121 .

[0062] In some embodiments, the first limiting protrusion 1231 is disposed at the corresponding slot 1221 of the guide slot 122 , so that the slot 1221 is limited to prevent the guide hook 112 from separating from the corresponding guide slot 122 .

[0063] As can be seen, the first limiting protrusion 1231 of the limiting block 123 is designed to limit the range of motion of the guide hook 112, thereby ensuring that the guide hook 112 moves within a predetermined path or space. This design ensures that the guide hook 112 does not exceed its intended range of motion and prevents the guide hook 112 from escaping from the corresponding guide slot 122.

[0064] To facilitate installation of the limiting block 123 , the limiting block 123 may be connected to the second hinge body 121 in a detachable manner.

[0065] Specifically, the second hinge body 121 is provided with a receiving groove 124, which communicates with the corresponding guide groove 122. The receiving groove 124 is used to accommodate at least part of the structure of the limiting block 123. For example, in addition to the first limiting protrusion 1231, the limiting block 123 also includes a portion for connecting with the second hinge body 121. The receiving groove 124 is used to accommodate the portion of the limiting block 123 that is connected to the second hinge body 121. When this portion is located in the receiving groove 124, the first limiting protrusion 1231 on the limiting block 123 can extend into the corresponding notch 1221 of the guide groove 122, so that the notch 1221 of the guide groove 122 is constricted to a position that can prevent the guide hook 112 from disengaging from the guide groove 122.

[0066] In addition, the limit block 123 is provided with a through hole, and the second hinge body 121 is also provided with a connecting hole, which is located in the accommodating groove 124. The second hinge block 12 also includes a connecting member 125, which passes through the through hole and is connected to the corresponding connecting hole, so that the limit block 123 is fixed on the corresponding second hinge body 121.

[0067] Of course, the connector 125 can be a detachable connector such as a screw or bolt, and correspondingly, the connecting hole can be a threaded connecting hole. The detachable connector is used to fix the limit block 123 to the second hinge body 121, which facilitates the installation and removal of the limit block 123.

[0068] Not only that, by loosening the connection between the screw or bolt and the connecting hole, the posture of the limit block 123 on the second hinge body 121 can also be adjusted. Specifically, after loosening the screw or bolt, the limit block 123 is rotated with the screw or bolt as the axis, thereby changing the position of the first limit protrusion 1231 on the limit block 123 in the corresponding guide groove body 122. In this way, the movement range of the guide hook 112 can be adjusted according to the actual arc adjustment needs, so that the arc adjustment range meets the application needs.

[0069] In some embodiments, the second hinge block 12 further includes a cover plate 126 , which is detachably connected to the second hinge body 121 . The cover plate 126 is used to cover the guide slot 122 on the second hinge body 121 .

[0070] It can be understood that the guide groove 122 and the limit block 123 can limit the displacement of the guide hook 112 within the plane where the second hinge body 121 is located. On this basis, by providing a cover plate 126 connected to the second hinge body 121, the displacement of the guide hook 112 in the plane perpendicular to the second hinge body 121 can be further limited. In this way, the guide hook 112 can be limited in three-dimensional space, so that the guide hook 112 moves strictly according to the preset path or space, ensuring that the guide hook 112 will not exceed the range of its movement.

[0071] In this embodiment, the cover plate 126 includes two covering plate bodies 1261 and a narrowing body 1262 arranged between the two covering plate bodies 1261. The two covering plate bodies 1261 respectively cover the top of the two guide groove bodies 122. The width of the narrowing body 1262 is smaller than the covering plate bodies 1261. This can reduce the overall weight of the cover plate 126 and avoid the positioning pin on the second hinge body 121.

[0072] In order to ensure the stability of the connection of the cover 126, connection points can be set at the four corners of the cover 126, for example, four screws are screwed into the four corners of the cover 126 respectively to achieve the connection between the cover 126 and the second hinge body 121.

[0073] In some embodiments, in order to further improve the stability of the movement of the hinge module 10 during arc adjustment operation, a pair of guide hooks 112 are provided at both ends of the first hinge body 111 along the length direction, and the two pairs of guide hooks 112 are symmetrically distributed about the central axis of the first hinge body 111. Correspondingly, a pair of guide grooves 122 are provided at both ends of the second hinge body 121 along the length direction, and the two pairs of guide grooves 122 are symmetrically distributed about the central axis of the second hinge body 121.

[0074] In some embodiments, the hinge module 10 includes a plurality of first hinge blocks 11 and a plurality of second hinge blocks 12, and the number of first hinge blocks 11 is one less than the number of second hinge blocks 12. For example, the hinge module 10 includes three first hinge blocks 11 and four second hinge blocks 12, and a first hinge block 11 is provided between any two adjacent second hinge blocks 12. Alternatively, the number of first hinge blocks 11 is one more than the number of second hinge blocks 12, and a second hinge block 12 is provided between any two adjacent first hinge blocks 11. This arrangement ensures that both sides of the hinge module 10 are equipped with the first hinge block 11 or the second hinge block 12, thereby ensuring that the components connected to both sides of the hinge module 10 can have a unified structural arrangement, thereby reducing the cost of structural design.

[0075] In some embodiments, the first hinge block 11 and the second hinge block 12 are both provided with a pull rod and a positioning pin, and the pull rod controls the positioning pin to achieve the locking and loosening of the upper and lower splicing of the box body 30 connected to the hinge module 10.

[0076] Specifically, each box body 30 has a positioning pin at the upper end and an opening at the lower end. When the upper and lower boxes 30 are spliced ​​together, the pull rod drives the positioning pin to extend into the hole and lock it, and the two boxes 30 can be loosened by withdrawing from the hole.

[0077] Please also refer to Figure 9 The present application provides an LED display device, including a box body 30 and multiple LED display modules 20. The multiple LED display modules 20 are hinged to each other to form a display panel. The box body 30 includes two frame modules 31 and also includes the hinge module 10 described in the above specific embodiment. Two hinge modules 10 are provided. The upper and lower ends of the display panel are respectively connected to the two hinge modules 10, and the two frame modules 31 are respectively connected to the left and right sides of the two hinge modules 10.

[0078] In addition, the LED display device further includes a central control box module 40 , which is communicatively connected to the LED display module 20 and is used to control the LED display module 20 to perform display work.

[0079] The main structure of the lower hinge module 10 and the upper hinge module 10 is the same, both including three first hinge blocks 11 and four second hinge blocks 12. A first hinge block 11 is arranged between any two adjacent second hinge blocks 12, and the curvature adjustment of the LED display module 20 is achieved through the guide hook 112 on the first hinge body 111 and the guide groove 122 and the limit block 123 on the first hinge body 111. Such an arrangement can ensure that the left and right sides of the hinge module 10 are both second hinge blocks 12. Therefore, the two frames 31 connected to the left and right sides of the hinge module 10 can adopt the same structure, that is, both frames 31 are provided with guide hooks 112 to cooperate with the guide groove 122 of the second hinge block 12, without the need for one of the frames 31 to be provided with a guide hook 112 and the other frame 31 to be provided with a guide groove 122. In this design, the two frames 31 adopt the same structure, which can reduce the structural design cost and mold manufacturing cost of the frames 31. The main difference between the lower hinge module 10 and the upper hinge module 10 is that the upper hinge module 10 is provided with a handle assembly.

[0080] It can be seen that in order to make the LED display device have an "S"-shaped curvature, an LED display module 20 + upper and lower hinge modules 10 + left and right frame modules 31 are used. The upper and lower hinge modules 10 are connected to the LED display module 20. The curvature of the LED display device can be controlled by adjusting the curvature of the hinge module 10. It has the characteristics of simple operation and convenient and fast arc adjustment. Whether the LED display device is adjusted to an inner arc or an outer arc, it can be achieved without taking both hands off the lock handle, which greatly improves the efficiency of the curvature adjustment.

[0081] With the above arrangement, the LED display device where the hinge module 10 is located can be adjusted within an arc range of +45 degrees to -45 degrees.

[0082] Please also refer to Figure 10 The curvature of the LED display device where the hinge module 10 is located can be 0 degrees, and at this time the hinge module 10 is in a straight state.

[0083] Please also refer to Figure 11 The LED display device where the hinge module 10 is located can be in an inner arc state of 45 degrees. At this time, the hinge module 10 is concave inward and the arc is 45 degrees.

[0084] Please also refer to Figure 12 The LED display device where the hinge module 10 is located can be in an outer arc state of 45 degrees. At this time, the hinge module 10 is concave outward and the arc is 45 degrees.

[0085] Please also refer to Figure 13 The LED display device where the hinge module 10 is located can be in a state of +45 degrees to the left and -45 degrees to the right (inner arc 45 degrees + outer arc 45 degrees), and at this time the hinge module 10 is S-shaped.

[0086] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0087] The hinge module and LED display device provided by the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the solution and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the present application.

Claims

1. A hinge module for connecting an LED display module, characterized in that: The hinge module includes a first hinge block and a second hinge block, the first hinge block includes a first hinge body, and the first hinge body is provided with guide hooks at both ends along the length direction, the second hinge block includes a second hinge body, and the second hinge body is provided with guide grooves at both ends along the length direction, the guide hooks can be movably embedded in the corresponding guide grooves, and the guide grooves are used to guide the movement of the guide hooks, so that the guide hooks can move between a first position and a second position to adjust the angle between the first hinge block and the second hinge block.

2. The hinge module according to claim 1, wherein: The second hinge block also includes a limit block, which is installed on the second hinge body. The guide hook is configured to be able to move between the first position and the second position under the limiting action of the corresponding groove bottom of the guide groove body and the limit block.

3. The hinge module according to claim 2, wherein: The limit block includes a first limit protrusion, which is arranged in the corresponding guide groove body. A second limit protrusion is provided at the end of the guide hook away from the first hinge body. The second limit protrusion and the first limit protrusion contact and abut against each other to limit the movement of the guide hook in the direction away from the corresponding groove bottom.

4. The hinge module according to claim 3, wherein: The first limiting protrusion is provided at the corresponding notch position of the guide slot body, so that the notch is limited to a position capable of preventing the guide hook from being separated from the corresponding guide slot body.

5. The hinge module according to claim 2, wherein: The second hinge body is provided with a receiving groove, the receiving groove is communicated with the corresponding guide groove body, and the receiving groove is used to receive at least a part of the structure of the limiting block; The limiting block is provided with a through hole, and the second hinge body is also provided with a connecting hole, which is located in the accommodating groove. The second hinge block also includes a connecting piece, which passes through the through hole and is connected to the corresponding connecting hole, so that the limiting block is fixed on the corresponding second hinge body.

6. The hinge module according to claim 1, wherein: The second hinge block further includes a cover plate, which is detachably connected to the second hinge body and is used to cover the guide groove on the second hinge body.

7. The hinge module according to claim 6, wherein: The cover plate includes two covering plates and a narrowing body arranged between the two covering plates. The two covering plates respectively cover the top of the two guide grooves. The width of the narrowing body is smaller than that of the covering plates to reduce weight and avoid the positioning pin on the second hinge body.

8. The hinge module according to any one of claims 1 to 7, wherein: A pair of guide hooks are provided at both ends of the first hinge body along the length direction, and the two pairs of guide hooks are symmetrically distributed about the central axis of the first hinge body; A pair of guide grooves are provided at both ends of the second hinge body along the length direction, and the two pairs of guide grooves are symmetrically distributed about the central axis of the second hinge body.

9. The hinge module according to any one of claims 1 to 7, wherein: The hinge module includes several first hinge blocks and several second hinge blocks, the number of the first hinge blocks is one less than the number of the second hinge blocks, and a first hinge block is set between any two adjacent second hinge blocks; or the number of the first hinge blocks is one more than the number of the second hinge blocks, and a second hinge block is set between any two adjacent first hinge blocks.

10. An LED display device, comprising a housing and a plurality of LED display modules, wherein the plurality of LED display modules are hinged to each other to form a display panel, the housing comprising two frames, characterized in that: It also includes the hinge module according to any one of claims 1 to 9, wherein two hinge modules are provided, both ends of the display panel are respectively connected to the two hinge modules, and the two frames are respectively connected to the two sides of the two hinge modules.

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