Rotary locking device and display screen

Abstract

The utility model provides a rotary locking device and a display screen, the rotary locking device is used for detachable connection between a fixed main body and an installation main body, and the rotary locking device comprises a rotating shaft, a locking mechanism and a locking mechanism, the rotating action piece is rotationally arranged on the rotating shaft, a clamping hook is arranged at one end of the rotating action piece, and a triggering structure is arranged at the other end of the rotating action piece; the elastic piece is connected with the rotating action piece and can drive the rotating action piece to rotate to the locking position, and at the moment, the triggering structure acts to drive the rotating action piece to reversely rotate to the unlocking position; according to the rotary locking device and the display screen, the clamping hook capable of effectively limiting the installation case and the rotary action piece capable of being switched between the locking position and the unlocking position are adopted, so that the display module and the installation case can be effectively, reliably and rapidly connected in a detachable mode; the problem that in the prior art, a large screen fixing structure cannot give consideration to stability and assembly and disassembly efficiency is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen assembly, in particular to a rotary locking device and a display screen. Background Art

[0002] Large-screen display technology, with its remarkable features such as excellent brightness, long service life, and wide viewing angle, has become the preferred display solution in many occasions such as commercial spaces and pedestrian streets. With the continuous improvement of the public's requirements for visual experience, the trend of the display screen size is also towards larger sizes.

[0003] In order to support these increasingly large display panels, traditional fixed structures often adopt a design that is stable but not easily disassembled. Although this design ensures stability, in actual operation, there are many inconveniences, especially when the display screen fails or needs maintenance, it lacks the ability to respond quickly.

[0004] Therefore, the industry urgently needs a new type of installation and fixing structure that can not only stably carry large-size display screens but also provide a convenient and fast installation and disassembly method to improve the maintenance efficiency and ensure that the display screen can be restored to normal operation in a timely manner, meeting people's needs for efficient and stable display technology. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the utility model is to provide a rotary locking device and a display screen, which solve the problem that the large-screen fixed structure in the prior art cannot balance stability and installation and disassembly efficiency.

[0006] To solve the above technical problem, the utility model provides a rotary locking device for fixing the detachable connection between a main body and an installation main body, including:

[0007] A rotating shaft, which is arranged on the fixed main body;

[0008] A rotary action member, which is rotatably arranged on the rotating shaft. One end of the rotary action member is provided with a hook, and the other end is provided with a trigger structure;

[0009] An elastic member, which is connected to the rotary action member and can drive the rotary action member to rotate to the locking position. At this time, through the action of the trigger structure, the rotary action member is driven to rotate in the reverse direction to the unlocking position.

[0010] As a more preferred method, the trigger structure is made of a magnetic material, and a magnetic tool is used to attract or repel the trigger structure on the side of the fixed main body, and the trigger structure acts to drive the rotary action member to rotate to the unlocking position.

[0011] As a more preferred way, the catch includes a stop portion and a wedge portion integrally formed on the stop portion, wherein the wedge portion is disposed at an end of the rotating member. When the rotating member is in the locked position, the wedge portion limits the installation body.

[0012] As a more preferred way, the wedge portion includes a step protruding from the stop portion. When the rotating member is in the locked position, the wedge portion limits the installation body through the step. The step protruding from the stop portion can effectively limit the installation body and ensure the stability of the connection between the installation body and the fixed body.

[0013] As a more preferred way, the wedge portion includes a wedge surface disposed on the step. When the rotating member is in the locked position, the installation body is brought close to the fixed body. The installation body slides along the wedge surface and applies a squeezing force to the wedge surface. The squeezing force pushes the rotating member to rotate until the installation body slides out of the wedge surface and the squeezing force disappears. The rotating member rotates to the locked position under the action of the elastic member. In this way, the use of the rotary locking device is further facilitated. When connecting the installation body, there is no need to use tools to control the triggering mechanism to make the rotating member in the unlocked position.

[0014] As a more preferred way, the orientation of the step is consistent with the direction in which the rotating member rotates towards the locked position.

[0015] As a more preferred way, the elastic member is a torsion spring. One end of the torsion spring is fixedly sleeved on the rotating shaft, and the other end of the torsion spring is connected to the rotating member and applies an elastic force to the rotating member. Using the torsion spring as the elastic member has a simple structure, easy-to-obtain materials, and convenient use.

[0016] To solve the above problems, the present invention also provides a display screen, including:

[0017] One or more display modules and an installation chassis for installing the display modules;

[0018] The above-mentioned rotary locking device is used to detachably arrange the display module on the installation chassis.

[0019] As a more preferred way, the display module further includes a fine-tuning structure. The fine-tuning structure is fixed on the display module. The rotating shaft of the rotary locking device is rotatably arranged on the fine-tuning structure. By fine-tuning the distance between the rotating shaft and the installation chassis through the fine-tuning structure, the gap between the display module and the installation chassis is further fine-tuned, thereby realizing the fine-tuning of the flatness of the display screen.

[0020] As a more preferred embodiment, the fine-tuning structure includes a rotating shaft seat, adjusting screws respectively disposed above and below the rotating shaft seat, and an elastic adjusting member. A limiting hole is provided on the rotating shaft seat, and the rotating shaft is disposed in the limiting hole. Adjusting holes communicating with the limiting hole are respectively provided above and below the rotating shaft seat. The adjusting screws and the elastic adjusting member are respectively disposed in the adjusting holes and are in contact with the rotating shaft. The elastic adjusting member applies an elastic force to the rotating shaft towards the adjusting screw, so that the rotating shaft abuts against the adjusting screw. By rotating the adjusting screw to finely adjust the size of the adjusting screw screwed into the adjusting hole, the position of the rotating shaft in the limiting hole can be finely adjusted accordingly.

[0021] As described above, the rotating locking device and the display screen of the present invention have the following beneficial effects: When the rotating locking device of the present invention is in use, the installation main body is brought close to the fixed main body. The installation main body applies a squeezing force to the rotation acting member and causes the rotation acting member to rotate towards the unlocking position against the elastic force of the elastic member. When the installation main body is installed in place, the squeezing force applied to the rotation acting member disappears. The rotation acting member rotates to the locking position under the action of the elastic member, and the hook limits the installation main body, and the fixed main body is connected to the installation main body. Then, by triggering the structure to act, the rotation acting member is driven to rotate reversely to the unlocking position, and the limitation of the installation main body is released, and the installation main body and the fixed main body are unlocked from each other. In the present invention, the hook can effectively limit the installation main body, has good stability, and at the same time, the rotation acting member is driven by the triggering structure and the elastic member to quickly switch between the locking position and the unlocking position, realizing the quick detachable connection between the installation main body and the fixed main body.

[0022] The display screen of the present invention uses the above-mentioned rotating locking device to realize the detachable connection between the display module and the installation chassis. The rotating shaft is fixed on the display module. Similarly, first, the rotation acting member is rotated to the unlocking position by using the triggering structure. The installation chassis is brought close to the display module, and the triggering structure is released. The rotation acting member rotates to the locking position under the action of the elastic member, and the hook limits the installation chassis, and the display module is connected to the installation chassis. Then, by triggering the structure to act, the rotation acting member is driven to rotate reversely to the unlocking position, and the limitation of the installation chassis is released, and the installation chassis and the display module are unlocked from each other. In the present invention, the hook can effectively limit the installation main body, has good stability, and at the same time, the rotation acting member is driven by the triggering structure and the elastic member to quickly switch between the locking position and the unlocking position, realizing the quick detachable connection between the installation main body and the fixed main body.

[0023] In summary, the rotary locking device and the display screen of the present utility model realize the effective, reliable and quickly detachable connection of the display module and the installation chassis through the hook that can effectively limit the installation chassis and the rotating member that can switch between the locked position and the unlocked position, and solve the problem that the large-screen fixing structure in the prior art cannot balance stability and disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It shows an exploded schematic view of the rotary locking device of the present utility model;

[0025] Figure 2 It shows a schematic view of the locking process in an embodiment of the rotary locking device and the display screen of the present utility model;

[0026] Figure 3 It shows a schematic view when the rotary locking device and the display screen of the present utility model are locked in an embodiment;

[0027] Figure 4 It shows a schematic view of the unlocking process in an embodiment of the rotary locking device and the display screen of the present utility model;

[0028] Figure 5 It shows a schematic view when the rotary locking device and the display screen of the present utility model are unlocked in an embodiment;

[0029] Figure 6 It shows a schematic view of the locking process in another embodiment of the rotary locking device and the display screen of the present utility model;

[0030] Figure 7 It shows a schematic view when the rotary locking device and the display screen of the present utility model are locked in another embodiment;

[0031] Figure 8 It shows a schematic view of the unlocking process in another embodiment of the rotary locking device and the display screen of the present utility model;

[0032] Figure 9 It shows a schematic view when the rotary locking device and the display screen of the present utility model are unlocked in another embodiment.

[0033] DESCRIPTION OF REFERENCE NUMERALS

[0034] 1 Rotating shaft

[0035] 2 Rotating member

[0036] 21 Hook

[0037] 211 Stopping portion

[0038] 212 Wedge portion

[0039] 212a Step

[0040] 212b Wedge surface

[0041] 22 Trigger structure

[0042] 23 Crank

[0043] 24 Rotating shaft hole

[0044] 3 Elastic member

[0045] 4 Fine-tuning structure

[0046] 41 Rotating shaft seat

[0047] 411 Limit hole

[0048] 412 Adjusting hole

[0049] 42 Adjusting screw

[0050] 43 Elastic adjusting member

[0051] 5 Fixed main body

[0052] 6 Mounting main body

[0053] 7 Magnetic tool Specific implementation mode

[0054] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0055] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is only limited by the claims of the published patent. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "beneath", "lower part", "above", "upper part", etc., may be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0056] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", "holding", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition only occurs when the combination of elements, functions, or operations is inherently mutually exclusive in some way.

[0058] As Figures 1 to 9 shown, the present utility model provides a rotary locking device for fixing the detachable connection between the main body 5 and the mounting main body 6, including:

[0059] A rotating shaft 1, the rotating shaft 1 is arranged on the fixed main body 5;

[0060] A rotating action member 2, the rotating action member 2 is rotatably arranged on the rotating shaft 1, one end of the rotating action member 2 is provided with a hook 21, and the other end is provided with a trigger structure 22;

[0061] An elastic member 3, the elastic member 3 is connected to the rotating action member 2 and can drive the rotating action member 2 to rotate to the locking position, and then through the action of the trigger structure 22, drive the rotating action member 2 to rotate in the reverse direction to the unlocking position.

[0062] To better introduce the rotary locking device of the present utility model, the following specific applications are now combined for illustration: When the rotary locking device of the present utility model is in use, the mounting main body 6 is brought close to the fixed main body 5. The mounting main body 6 applies a squeezing force to the rotary moving member 2, causing the rotary moving member 2 to rotate towards the unlocking position against the elastic force of the elastic member 3. When the mounting main body 6 is installed in place, the squeezing force applied to the rotary moving member 6 disappears. The rotary moving member 2 rotates to the locking position under the action of the elastic member 3, and the hook 21 limits the mounting main body 6, and the fixed main body 5 is connected to the mounting main body 6. Then, by the action of the triggering structure 22, the rotary moving member 2 is driven to rotate in the reverse direction to the unlocking position, and the limit of the mounting main body 6 is released, and the mounting main body 6 and the fixed main body 5 are unlocked from each other. In the present utility model, the hook 21 can effectively limit the mounting main body 6, having good stability. At the same time, through the triggering structure 22 and the elastic member 3, the rotary moving member 2 is driven to quickly switch between the locking position and the unlocking position, realizing the quick detachable connection between the mounting main body 6 and the fixed main body 5.

[0063] Further, in this embodiment, as Figure 1 shown, the rotary moving member 2 further includes a crank 23. One end of the crank 23 is connected to the triggering structure 22, and the other end of the crank 23 is connected to the hook 21. A rotating shaft hole 24 is provided at the connection between the crank 23 and the hook 21, and the rotating shaft 1 passes through the rotating shaft hole 24, thereby realizing the rotational setting of the rotary moving member 2 on the rotating shaft 1.

[0064] In this embodiment, as Figure 1 shown, the triggering structure 22 is made of a magnetic attraction material, and a magnetic attraction tool 7 is used to attract or repel the triggering structure 22 on the side of the fixed main body 5, and the triggering structure 22 acts to drive the rotary moving member 2 to rotate to the unlocking position.

[0065] In this embodiment, as Figure 1 shown, the hook 21 includes a stop portion 211 and a wedge portion 212 integrally formed with the stop portion 211. The wedge portion 212 is provided at the end of the rotary moving member 2. When the rotary moving member 2 is in the locking position, the wedge portion 212 limits the mounting main body 6.

[0066] In this embodiment, as Figure 1 shown, the wedge portion 212 includes a step 212a protruding from the stop portion 211. When the rotary moving member 2 is in the locking position, the wedge portion 212 limits the mounting main body 6 through the step 212a. The step 212a protruding from the stop portion 211 can effectively limit the mounting main body 6, ensuring the stability of the connection between the mounting main body 6 and the fixed main body 5.

[0067] In this embodiment, as Figure 1 shown, the wedge portion 212 includes a wedge surface 212b provided on the step 212a. When the rotating actuator 2 is in the locked position, the mounting body 6 is brought close to the fixed body 5. The mounting body 6 slides along the wedge surface 212b and applies a pressing force to the wedge surface 212b. The pressing force pushes the rotating actuator 2 to rotate until the mounting body 6 slides out of the wedge surface 212b and the pressing force disappears. The rotating actuator 2 rotates to the locked position under the action of the elastic member 3; thus, it further facilitates the use of the rotary locking device. When connecting the mounting body 6, there is no need to use tools to control the triggering mechanism to act so that the rotating actuator 2 is in the unlocked position.

[0068] In this embodiment, as Figure 1 shown, the orientation of the step 212a is the same as the direction in which the rotating actuator 2 rotates towards the locked position. When the hook 21 faces upward, the step 212a faces rightward, and when locking, the rotating actuator 2 rotates clockwise towards the locked position; when the step 212a faces leftward, the rotating actuator 2 rotates counterclockwise towards the locked position when locking. Specifically, in this embodiment, as Figure 2 shown, the hook 21 faces upward and the step 212a is arranged to face rightward. When locking the fixed body 5 and the mounting body 6, the mounting body 6 is brought close to the fixed body 5. The mounting body 6 slides along the wedge surface 212b and applies a pressing force to the wedge surface 212b. The pressing force pushes the rotating actuator 2 to rotate counterclockwise, as Figure 2 shown, until the mounting body 6 slides out of the wedge surface 212b and the pressing force disappears. The rotating actuator 2 rotates clockwise to the locked position under the action of the elastic member 3, and the mounting body 6 and the fixed body 5 are locked to each other, as Figure 3 shown; when unlocking is required, a magnetic tool 7 can be used to attract or repel the trigger structure 22 on the side of the fixed body 5. The trigger structure 22 acts to drive the rotating actuator 2 to rotate counterclockwise to the unlocked position, as Figure 4 shown, so that the mounting body 6 and the fixed body 5 are unlocked from each other, as Figure 5 shown; similarly, in another embodiment, as Figure 6 shown, the hook 21 faces upward and the step 212a is arranged to face leftward. In this embodiment, when locking the fixed body 5 and the mounting body 6, the mounting body 6 is brought close to the fixed body 5. The mounting body 6 slides along the wedge surface 212b and applies a pressing force to the wedge surface 212b. The pressing force pushes the rotating actuator 2 to rotate clockwise, as Figure 6As shown; until the installation main body 6 slides out of the wedge surface 212b and the extrusion force disappears, the rotary actuator 2 rotates counterclockwise to the locked position under the action of the elastic member 3, and the installation main body 6 and the fixed main body 5 are locked to each other, as Figure 7 shown; then, a magnetic attraction tool 7 can be used to attract or repel the trigger structure 22 on the side of the fixed main body 5, and the trigger structure 22 acts to drive the rotary actuator 2 to rotate clockwise to the unlocked position, as Figure 8 shown, so that the installation main body 6 and the fixed main body 5 are unlocked from each other, as Figure 9 shown.

[0069] In this embodiment, as Figure 1 shown, the elastic member 3 is a torsion spring. One end of the torsion spring is fixedly sleeved on the rotating shaft 1, and the other end of the torsion spring is connected to the rotary actuator 2 and applies an elastic force to the rotary actuator 2. Using the torsion spring as the elastic member 3 has a simple structure, easy-to-obtain materials, and is convenient to use.

[0070] To solve the above problems, the present invention also provides a display screen, including:

[0071] One or more display modules and an installation chassis for installing the display modules;

[0072] The above-mentioned rotary locking device is used to detachably arrange the display module on the installation chassis.

[0073] To better introduce the present invention, the following specific application is now combined for illustration: The display screen of the present invention uses the above-mentioned rotary locking device to realize the detachable connection between the display module and the installation chassis. The rotating shaft 1 is fixed on the display module. Similarly, first, the trigger structure 22 is used to rotate the rotary actuator 2 to the unlocked position. The installation chassis is brought close to the display module, and the trigger structure 22 is released. The rotary actuator 2 rotates to the locked position under the action of the elastic member 3, and the hook 21 limits the installation chassis, and the display module is connected to the installation chassis; then, the trigger structure 22 acts to drive the rotary actuator 2 to rotate in the reverse direction to the unlocked position, and the limit of the installation chassis is released, and the installation chassis and the display module are unlocked from each other; in the present invention, the hook 21 can effectively limit the installation main body 6, has good stability, and at the same time, the trigger structure 22 and the elastic member 3 drive the rotary actuator 2 to quickly switch between the locked position and the unlocked position, realizing the quick detachable connection between the installation main body 6 and the fixed main body 5.

[0074] In this embodiment, as Figure 1As shown, the display module further includes a fine-tuning structure 4. The fine-tuning structure 4 is fixed to the display module. The rotating shaft 1 of the rotary locking device is rotatably arranged on the fine-tuning structure 4. The distance between the rotating shaft 1 and the installation chassis is fine-tuned through the fine-tuning structure 4, so as to achieve the effect of fine-tuning the gap between the display module and the installation chassis, thereby realizing the fine-tuning of the flatness of the display screen.

[0075] In this embodiment, as Figure 1 shown, the fine-tuning structure 4 includes a rotating shaft seat 41, adjusting screws 42 respectively arranged above and below the rotating shaft seat 41, and an elastic adjusting member 43. A limiting hole 411 is provided on the rotating shaft seat 41. The rotating shaft 1 is arranged in the limiting hole 411. Adjusting holes 412 communicating with the limiting hole 411 are respectively provided above and below the rotating shaft seat 41. The adjusting screws 42 and the elastic adjusting member 43 are respectively arranged in the adjusting holes 412 and are in contact with the rotating shaft 1 respectively. The elastic adjusting member 43 applies an elastic force to the rotating shaft 1 towards the adjusting screw 42, so that the rotating shaft 1 abuts against the adjusting screw 42. By rotating the adjusting screw 42 to fine-tune the size of the adjusting screw 42 screwed into the adjusting hole 412, the position of the rotating shaft 1 in the limiting hole 411 is fine-tuned.

[0076] Furthermore, in this embodiment, when the triggering structure 22 is made of a magnetic attraction material, a magnetic attraction tool 7 is used to attract or repel the triggering structure 22 on the front side of the display unit. The triggering structure 22 acts to drive the rotating member 2 to rotate to the unlocking position, so that the display screen can be conveniently maintained from the front side.

[0077] As described above, the rotary locking device and the display screen of the present invention have the following beneficial effects: When the rotary locking device of the present invention is in use, the rotating member 2 is rotated to the unlocking position by using the triggering structure 22. The installation main body 6 is brought close to the fixed main body 5, and the triggering structure 22 is released. The rotating member 2 rotates to the locking position under the action of the elastic member 3. The hook 21 limits the installation main body 6, and the fixed main body 5 is connected to the installation main body 6; then, the rotating member 2 is driven to rotate in the reverse direction to the unlocking position by the action of the triggering structure 22, and the limitation of the installation main body 6 is released, and the installation main body 6 and the fixed main body 5 are unlocked from each other; in the present invention, the hook 21 can effectively limit the installation main body 6, has good stability, and at the same time, the rotating member 2 is driven by the triggering structure 22 and the elastic member 3 to quickly switch between the locking position and the unlocking position, realizing the quick detachable connection between the installation main body 6 and the fixed main body 5;

[0078] In summary, the rotating locking device and the display screen of the present utility model realize the effective, reliable and quickly detachable connection of the display module and the installation chassis through the hook 21 that can effectively limit the installation chassis and the rotating member 2 that can switch between the locking position and the unlocking position, and solve the problem that the large screen fixing structure in the prior art cannot balance stability and disassembly efficiency. Therefore, the present utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0079] The above embodiments are only illustrative of the principles and effects of the present utility model and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A rotary locking device for fixing a detachable connection between a main body (5) and a mounting body (6), characterized in that: include: A rotating shaft (1), wherein the rotating shaft (1) is arranged on the fixed body (5); A rotating action member (2), the rotating action member (2) being rotatably disposed on the rotating shaft (1), one end of the rotating action member (2) being provided with a hook (21), and the other end of the rotating action member (2) being provided with a trigger structure (22); The elastic member (3) is connected to the rotating member (2) and can drive the rotating member (2) to rotate to a locked position. At this time, the trigger structure (22) is activated to drive the rotating member (2) to rotate in the opposite direction to an unlocked position.

2. The rotary locking device according to claim 1, characterized in that: The trigger structure (22) is made of magnetic material, and a magnetic tool (7) is used to attract or repel the trigger structure (22) on the side of the fixed body (5). The action of the trigger structure (22) drives the rotating action member (2) to rotate to an unlocking position.

3. The rotary locking device according to claim 1, characterized in that: The hook (21) comprises a stopper portion (211) and a wedge-shaped portion (212) integrally formed with the stopper portion (211), wherein the wedge-shaped portion (212) is arranged at an end of the rotating action member (2), and when the rotating action member (2) is in a locked position, the wedge-shaped portion (212) limits the mounting body (6).

4. The rotary locking device according to claim 3, characterized in that: The wedge-shaped portion (212) comprises a step (212a) protruding from the stop portion (211); when the rotating action member (2) is in a locked position, the wedge-shaped portion (212) limits the mounting body (6) via the step (212a).

5. The rotary locking device according to claim 4, characterized in that: The wedge-shaped portion (212) comprises a wedge-shaped surface (212b) arranged on the step (212a). When the rotating action member (2) is in the locking position, the installation body (6) is brought close to the fixed body (5), the installation body (6) slides along the wedge-shaped surface (212b) and applies a squeezing force to the wedge-shaped surface (212b), the squeezing force pushes the rotating action member (2) to rotate until the installation body (6) slides out of the wedge-shaped surface (212b), the squeezing force disappears, and the rotating action member (2) rotates to the locking position under the action of the elastic member (3).

6. The rotary locking device according to claim 4, characterized in that: The direction of the step (212a) is consistent with the direction in which the rotating action member (2) rotates toward the locking position.

7. The rotary locking device according to claim 1, characterized in that: The elastic member (3) is a torsion spring, one end of which is fixedly sleeved on the rotating shaft (1), and the other end of which is connected to the rotating action member (2) to apply elastic force to the rotating action member (2).

8. A display screen, characterized in that: include: One or more display modules and a mounting chassis for mounting the display modules; One or more rotary locking devices according to any one of claims 1 to 7 are used to detachably mount the display module on the mounting chassis.

9. The display screen according to claim 8, characterized in that: The display module further comprises a fine-tuning structure (4), wherein the fine-tuning structure (4) is fixed on the display module, and the rotating shaft (1) of the rotary locking device is rotatably arranged on the fine-tuning structure (4). The distance between the rotating shaft (1) and the mounting chassis is fine-tuned by the fine-tuning structure (4), thereby achieving the effect of fine-tuning the gap between the display module and the mounting chassis, thereby realizing fine-tuning of the flatness of the display screen.

10. The display screen according to claim 9, characterized in that: The fine-tuning structure (4) comprises a rotating shaft seat (41), an adjusting screw (42) arranged at the upper and lower parts of the rotating shaft seat (41), and an elastic adjusting member (43); a limiting hole (411) is arranged on the rotating shaft seat (41); the rotating shaft (1) is arranged in the limiting hole (411); the upper and lower parts of the rotating shaft seat (41) are respectively provided with adjusting holes (412) which are in communication with the limiting hole (411); the adjusting screw (42) and the elastic adjusting member (43) are arranged in the adjusting holes (412) and are respectively in contact with the rotating shaft (1); the elastic adjusting member (43) applies an elastic force to the rotating shaft (1) towards the adjusting screw (42), so that the rotating shaft (1) abuts against the adjusting screw (42); the size of the adjusting screw (42) screwed into the adjusting hole (412) is fine-tuned by rotating the adjusting screw (42), thereby achieving the purpose of fine-tuning the position of the rotating shaft (1) in the limiting hole (411).

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