Fixing mechanism for multi-size display screen and display device

By combining the fixed support and fixed frame structure with the design of the gas-driven piston plate, the problem of cumbersome operation for fixing multi-size display screens in the existing technology is solved, and screen protection is achieved during the fast and stable fixing and replacement of multiple screens.

CN121156933APending Publication Date: 2025-12-19SHENZHEN HAIZHIQING TECH CO LTD
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Patent Information

Application Number
CN202511519704.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-23
Publication Date
2025-12-19

AI Technical Summary

Technical Problem

Existing display screen fixing mechanisms are mostly designed for single-size adaptation, which leads to cumbersome operation, low installation efficiency, and difficulty in ensuring the consistency of the fixing status of multiple screens.

Method used

It adopts a combination structure of fixed support and fixed frame, and uses gas to drive piston plate to drive push column to realize the synchronous fixation of multiple display screens. Combined with gear mechanism to prevent loosening due to accidental operation, it can adapt to the fixation requirements of screens of different sizes.

Benefits of technology

It enables quick and stable fixing and locking of multi-size display screens, reduces operation steps, improves installation efficiency, and prevents other screens from becoming loose or damaged when replacing a screen.

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Abstract

The invention relates to the technical field of display screen fixing, and discloses a fixing mechanism for a multi-size display screen, the fixing mechanism comprises a fixing support column and a fixing frame, a display screen is arranged in the fixing frame, a first L-shaped column is arranged on the fixing frame, a fixing cavity is formed in the fixing support column, a limiting assembly and a pushing assembly are arranged in the fixing cavity, and the limiting assembly and the pushing assembly are arranged in the fixing cavity. According to the display screen fixing frame, all display screens on the fixing supporting column are inserted into the fixing cavity through the first L-shaped columns of the fixing frame, all the first L-shaped columns move downwards to push gas into the connecting pipe, the gas is pushed into the connecting pipe, and then the gas is pushed into the connecting pipe; finally, gas in the gas collection box pushes a piston plate and a pushing column to move upwards, all first limiting columns are driven to synchronously penetrate through a first sliding plate and a first L-shaped column, all the display screens to be detected are fixed, one-by-one operation is not needed, and the fixing and mounting time is greatly shortened.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display screen fixing, in particular to a fixing mechanism for multi-size display screens and a display device. BACKGROUND

[0002] With the rapid development of display technology, the application scenarios of display screens are increasingly widespread, from traditional televisions, computer monitors to smart phones, smart wearable devices, etc., and the size and specifications thereof show a diversification trend. In the production and testing links of display screens (such as aging test, performance test, etc.), multiple display screens of different sizes often need to be fixed on a test support at the same time to improve the test efficiency.

[0003] The fixing mechanism for display screens is usually designed to adapt to a single size, that is, a fixing structure can only match a display screen of a specific size. When different size screens need to be tested, the corresponding fixing components need to be replaced, which is cumbersome and has poor versatility. Moreover, the existing fixing methods are mostly independent fixing one by one, that is, each display screen needs to be fixed by a bolt, a buckle or a clamp. When multiple screens are installed, multiple operations need to be repeated, which leads to low installation efficiency and makes it difficult to ensure the consistency of the fixed state of multiple screens. SUMMARY

[0004] The purpose of the present application is to provide a fixing mechanism for multi-size display screens and a display device to solve the problems raised in the background.

[0005] TECHNICAL SOLUTION The present application provides the following technical solution: a fixing mechanism for multi-size display screens, comprising a fixing support and a fixing frame, a display screen is arranged in the fixing frame, a first L-shaped column is arranged on the fixing frame, a fixing cavity is formed in the fixing support, a limiting assembly and a pushing assembly are arranged in the fixing cavity, the limiting assembly comprises a second L-shaped column and a first limiting column, the pushing assembly comprises a pushing column, when multiple fixing frames on the same fixing support enter the fixing cavity in sequence through the first L-shaped column, the first L-shaped column contacts the second L-shaped column under the action of gravity, the first L-shaped column moves downward and charges the pushing assembly, and after the last fixing frame is fixed on the fixing support, the pushing assembly drives the first limiting column to fix the first L-shaped column through the pushing column.

[0006] Preferably, the pushing assembly further comprises a gas collecting tank and a connecting pipe, one end of the connecting pipe is connected with the second L-shaped column, and the other end extends into the gas collecting tank, a piston plate and an adjusting valve are arranged in the gas collecting tank, and the piston plate is fixedly connected with the pushing column.

[0007] Preferably, a piston cavity is arranged in the second L-shaped column, a pushing plate is arranged in the piston cavity, and the piston cavity is in communication with the gas collecting tank through the connecting pipe.

[0008] Preferably, the fixed cavity is provided with a first sliding plate, an extrusion piston cylinder, a first rack column, a first fixed column and a movable rod, the first sliding plate is in contact with the first L-shaped column, the movable rod side is provided with a push plate, the first rack column is provided with a first inclined block, and the first inclined block is fixedly connected with the first limiting column.

[0009] Preferably, the first fixed column is provided with a first rotating gear and a second rotating gear, and the first rotating gear and the second rotating gear are in movable contact, the first rotating gear is provided with a ratchet gear, and the second rotating gear is provided with a limiting tooth block.

[0010] Preferably, the movable rod is provided with a first reset spring, the first rack column is in meshing connection with the first rotating gear, and the movable rod side is in meshing connection with the second rotating gear.

[0011] Preferably, the push column side is provided with a connecting frame, the connecting frame is provided with an inclined push column and an inclined column, and the upper end of the inclined push column is in sliding contact with the first inclined block.

[0012] Preferably, the connecting frame is provided with a second inclined block, the second inclined block is provided with a second limiting column, and the inclined push column is provided with a limiting groove matched with the second limiting column, and the second inclined block and the inclined column are in sliding contact through the inclined surface.

[0013] Preferably, the inclined column is provided with a first connecting column, the inclined push column is provided with a second connecting column, the horizontal height of the first connecting column is higher than that of the second connecting column, and the first connecting column and the second connecting column are both located below the push plate, the second connecting column is provided with a second sliding plate below, and the second sliding plate is provided with a second reset spring below.

[0014] A display device comprises a fixing mechanism for multi-size display screens.

[0015] Advantages Compared with the prior art, the fixing mechanism for multi-size display screens and the display device have the following advantages: 1、In the fixing mechanism for multi-size display screens, after all the display screens on the fixing support are inserted into the fixed cavities through the first L-shaped columns of the fixing frames, the downward movement of each first L-shaped column pushes the gas into the connecting pipe, and finally the gas in the gas collecting box pushes the piston plate and the push column upward, thereby driving all the first limiting columns to penetrate the first sliding plate and the first L-shaped column synchronously, so that the fixation of all the display screens to be detected is completed, and the fixation and installation time is greatly shortened.

[0016] 2、The display screen in the application, when a certain display screen needs to be replaced, the push plate corresponding to the fixed cavity is pushed down, the second limiting column is separated from the inclined push column through the structure of the inclined column and the second inclined block, and the inclined push column is driven to move downward and separate from the first inclined block; at the same time, the movable rod drives the gear mechanism to drive the first rack column and the first inclined block to move, so that the first limiting column is separated from the first L-shaped column of the screen, and the fixing mechanism of other screens remains in the locked state in the whole process, so as to avoid damage of other screens due to loose operation.

[0017] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, rather than limiting the present disclosure.

[0018] The present application file provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 The fixed figure of the display screen of the present application; Figure 2 The schematic diagram of the first L-shaped column of the present application extending into the fixed support column; Figure 3 The schematic diagram in the fixed cavity of the present application; Figure 4 The connection diagram of the first rack column and the first rotating gear of the present application; Figure 5 The position diagram of the connecting frame, the first connecting column and the second connecting column of the present application; Figure 6 The connection explosion diagram of the first rotating gear and the second rotating gear of the present application; Figure 7 The connection diagram of the second connecting column and the sliding plate of the present application; Figure 8 The connection diagram of the push column, the connecting frame and the inclined push column of the present application; Figure 9 The partial sectional view of the inclined push column and the connecting frame of the present application; Figure 10 The working diagram of the push column of the present application; Figure 11 The front view of the display device of the present application; Figure 12 The rear view of the display device of the present application.

[0021] Explanation of reference signs: In the figure: 1, fixed support column; 2, fixed frame; 3, display screen; 4, dial plate; 5, first L-shaped column; 6, second L-shaped column; 7, first sliding plate; 8, push column; 9, connecting pipe; 10, extrusion piston cylinder; 11, first rack column; 12, first inclined block; 13, first limiting column; 14, first fixed column; 15, first rotating gear; 16, second rotating gear; 17, movable rod; 18, inclined push column; 19, first return spring; 20, second return spring; 21, connecting frame; 22, first connecting column; 23, second connecting column; 24, second sliding plate; 25, ratchet gear; 26, limiting tooth block; 27, inclined column; 28, second inclined block; 29, second limiting column; 30, limiting groove; 31, gas collecting box; 32, piston plate; 33, regulating valve; 34, push plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0023] Embodiment: Please refer to Figures 1-12 The present application provides a technical solution: a fixing mechanism for multi-size display screens, which comprises a fixed support column 1 and a fixed frame 2. The fixed frame 2 is provided with a display screen 3. The fixed frame 2 is provided with a first L-shaped column 5. The fixed support column 1 is provided with a fixed cavity. The fixed cavity is provided with a limiting assembly and a push assembly. The limiting assembly comprises a second L-shaped column 6 and a first limiting column 13. The second L-shaped column 6 is fixedly installed inside the fixed cavity and close to the side edge inner wall of the fixed cavity. The first limiting column 13 is fixedly installed on the first inclined block 12. The push assembly comprises a push column 8. The push column 8 penetrates through all the fixed cavities in the fixed support column 1 and is movably connected to the gas collecting box 31 in the lowermost fixed cavity in the fixed support column 1. After multiple fixed frames 2 on the same fixed support column 1 enter the fixed cavities in sequence through the first L-shaped column 5, the first L-shaped column 5 contacts the second L-shaped column 6 under the action of gravity. The first L-shaped column 5 moves downward and charges the push assembly. After the last fixed frame 2 is fixed on the fixed support column 1, the push assembly drives the first limiting column 13 to fix the first L-shaped column 5 through the push column 8. The limiting column 13 can penetrate through the first sliding plate 7 and the first L-shaped column 5 to limit and fix the first L-shaped column 5.

[0024] In this embodiment, the pushing assembly further includes a gas collecting box 31 and a connecting pipe 9. One end of the connecting pipe 9 is connected with the second L-shaped column 6, and the other end extends into the gas collecting box 31. A piston plate 32 is movably installed in the gas collecting box 31, and an adjusting valve 33 is fixedly installed inside the gas collecting box 31. The bottom end of the pushing column 8 penetrates through the inner wall of the top end of the gas collecting box 31 and is fixedly connected with the piston plate 32. The adjusting valve 33 is arranged at the outlet of the connecting pipe 9 in the gas collecting box 31. Only when all the fixed frames 2 on the fixed support 1 are inserted into the fixed cavities, the adjusting valve 33 in the gas collecting box 31 will be opened to release the accumulated gas in the connecting pipe 9 into the gas collecting box 31. Under the pushing of the gas, the piston plate 32 in the gas collecting box 31 will move upwards, and the pushing column 8 will move upwards, which can simultaneously drive all the first limiting columns 13 in the fixed support 1 to synchronously fix the fixed frames 2.

[0025] In this embodiment, the second L-shaped column 6 is provided with a piston cavity, a pushing plate 34 is movably installed in the piston cavity, and the piston cavity is communicated with the gas collecting box 31 through the connecting pipe 9. A through slot with the length of the first L-shaped column 5 is formed in the fixed support 1. When the first L-shaped column 5 first contacts the first sliding plate 7 through the through slot and pushes the first sliding plate 7, when the first L-shaped column 5 cannot move in the fixed cavity, the first L-shaped column 5 will move downwards. The first L-shaped column 5 will drive the pushing plate 34 to move downwards in the piston cavity, and push the gas in the piston cavity into the connecting pipe 9. When the first L-shaped column 5 moves downwards, the first L-shaped column 5 and the second L-shaped column 6 will be mutually clamped.

[0026] In this embodiment, the first sliding plate 7, the first rack column 11 and the movable rod 17 are movably installed in the fixed cavity, and the extrusion piston cylinder 10 and the first fixed column 14 are fixedly installed. The extrusion piston cylinder 10 is fixedly connected with the back side of the first sliding plate 7. The first rack column 11 and the movable rod 17 are both movably installed with connecting rods in the interiors thereof, and the end portions of the connecting rods are fixedly connected with the inner wall of the fixed cavity. The first sliding plate 7 contacts the first L-shaped column 5. The movable rod 17 is fixedly installed with a pushing plate 4 on the side edge thereof. The pushing plate 4 penetrates through the side wall of the fixed support 1 and extends outward. The first inclined block 12 is fixedly installed on the upper end of the first rack column 11. The side edge of the first inclined block 12 is fixedly connected with the first limiting column 13. The first rack column 11 and the first limiting column 13 are not located on the same side.

[0027] In this embodiment, the first fixed column 14 is movably installed with the first rotating gear 15 and the second rotating gear 16. The first rotating gear 15 and the second rotating gear 16 are movably contacted. The first rotating gear 15 is fixedly installed with a ratchet gear 25 on the side close to the second rotating gear 16. The second rotating gear 16 is movably installed with a limiting tooth block 26 in the interior thereof. The ratchet gear 25 of the first rotating gear 15 extends into the second rotating gear 16 and is meshingly connected with the limiting tooth block 26.

[0028] When the first rack column 11 moves to the side of the first sliding plate 7, the first rotating gear 15 will drive the second rotating gear 16 to rotate through the ratchet gear 25 and the limiting tooth block 26, and when the first rack column 11 moves away from the first sliding plate 7, the first rotating gear 15 will not drive the second rotating gear 16 to rotate through the ratchet gear 25 and the limiting tooth block 26.

[0029] In the embodiment, the bottom end of the movable rod 17 is fixedly installed with the first reset spring 19, the first rack column 11 is in meshing connection with the first rotating gear 15, and the side edge of the movable rod 17 is in meshing connection with the second rotating gear 16.

[0030] When the first inclined block 12 moves transversely and is inserted into the first sliding plate 7 and the first L-shaped column 5, the first rack column 11 will move in the same direction with the first inclined block 12.

[0031] In the embodiment, the side edge of the pushing column 8 is fixedly installed with the connecting frame 21, the connecting frame 21 is movably installed with the inclined pushing column 18 and the inclined column 27 respectively, the upper end of the inclined pushing column 18 is in sliding contact with the first inclined block 12, and the upper end of the inclined pushing column 18 and the lower end of the first inclined block 12 are both provided with matching inclined edges, which can drive the first inclined block 12 to move close to the first sliding plate 7 when the inclined pushing column 18 moves upward, and the inclined pushing column 18 and the inclined column 27 are arranged in parallel with each other and do not contact each other.

[0032] In the embodiment, the connecting frame 21 is movably installed with the second inclined block 28, one side of the second inclined block 28 close to the inclined pushing column 17 is fixedly installed with the second limiting column 29, and the other side of the second inclined block 28 is fixedly installed with the third reset spring, the second limiting column 29 is clamped with the inclined pushing column 18, the inclined pushing column 18 is provided with a limiting groove 30 matched with the second limiting column 29, and the second inclined block 28 and the inclined column 27 are in sliding contact through the inclined surface.

[0033] A sliding cavity is formed in the connecting frame 21 and is arranged in an inclined manner relative to the inclined pushing column 18, that is, the sliding cavity and the second inclined block 28 are not in a vertical state relative to the inclined pushing column 18, and when the inclined column 27 moves downward in the connecting frame 21, the second inclined block 28 will be driven to slide and press the third reset spring on the side edge of the second inclined block 28, and at the same time, the second inclined block 28 will drive the second limiting column 29 to be separated from the inclined pushing column 18 when sliding, so that the inclined pushing column 18 can be driven to move downward by the second connecting column 23, thereby facilitating the separation of the first limiting column 13 and the first L-shaped column 5, so that when in use, a display screen on the fixed support column 1 can be replaced during aging test, preventing the fixing mechanism of other display screens on the same fixed support column 1 from being separated, and preventing other display screens from being damaged.

[0034] In this embodiment, the bottom end of the inclined column 27 is fixedly installed with the first connecting column 22, the inclined column 27 penetrates through the connecting frame 21, and a through hole matching the movement track of the inclined column 27 is formed in the connecting frame 21, the bottom end of the inclined pushing column 18 is fixedly installed with the second connecting column 23, the horizontal height of the first connecting column 22 is higher than that of the second connecting column 23, and the first connecting column 22 and the second connecting column 23 are both located below the dial plate 4, the second connecting column 23 is fixedly installed below the second sliding plate 24, and the second sliding plate 24 is fixedly installed below the second reset spring 20.

[0035] When the dial plate 4 starts to move downward, the dial plate 4 will first contact the first connecting column 22 and drive the inclined column 27 to move downward through the first connecting column 22, and when the second limiting column 29 is separated from the inclined pushing column 18, the dial plate 4 will contact the second connecting column 23 during the downward movement, at this time, the first connecting column 22 and the second connecting column 23 will be driven to move downward together, and the second reset spring 20 will be extruded.

[0036] The through groove matching the length of the first L-shaped column 5 is formed in the fixed support column, and the fixed mechanism can meet the fixing requirements of display screens of different sizes through the clamping and sliding plate self-adaptive pushing of the first L-shaped column 5 and the second L-shaped column 6, without the need to design a fixed component for a specific size screen, and the application range is wider.

[0037] The piston plate is pushed by gas to realize synchronous upward movement of the pushing column, so as to ensure that all the first limiting columns are uniformly stressed and locked.

[0038] The meshing design of the ratchet gear and the limiting tooth block in the gear mechanism can prevent the first rack column 11 from moving reversely in the fixed state, avoid loosening of the first limiting column 13, provide stable fixed support for display screen aging test, and reduce the risk of screen displacement in the detection process.

[0039] Please refer to Figures 1-2 A display device comprising a fixing mechanism for display screens of different sizes.

[0040] The working principle of the embodiment is as follows: when the display screen is installed on the same fixed support 1, the first L-shaped column 5 on the fixed frame 2 is inserted into the fixed cavity in the fixed support 1, and when the first L-shaped column 5 enters the fixed cavity, the first sliding plate 7 is first pushed, and when the first sliding plate 7 cannot be pushed, the fixed frame 2 is lowered under the action of gravity, and the first L-shaped column 5 is in contact with the second L-shaped column 6 in the fixed cavity, and the second L-shaped column 6 is lowered, and the pushing plate 34 in the second L-shaped column 6 is lowered, and the gas in the second L-shaped column 6 is pushed into the connecting pipe 9, and when the last display screen on the same fixed support 1 is hung, the adjusting valve 33 is automatically opened, and the gas in the connecting pipe 9 is transported to the gas collecting box 31, so that the piston plate 32 in the gas collecting box 31 is lifted and the pushing column 8 is lifted together, and when the pushing column 8 is lifted, the connecting frame 21 is lifted together, and at this time, the second limiting column 29 in the connecting frame 21 is clamped on the inclined pushing column 18, so that the inclined pushing column 18 is lifted together with the connecting frame 21, and after the inclined pushing column 18 is lifted, the first inclined block 12 is brought close to the first sliding plate 7 through the action of the inclined edge, and the first limiting column 13 is penetrated through the first sliding plate 7 and the first L-shaped column 5, and the first L-shaped column 5 is limited and fixed, so that all the display screens to be detected on the same fixed support 1 are fixed synchronously, and the fixing and installation time of the display screens to be detected is shortened.

[0041] At the same time, the first L-shaped column 5 is limited and fixed by the first limiting column 13, so that the stability of the display screen during the aging test is ensured, and the display screen is prevented from being damaged.

[0042] When a display screen to be detected in the same fixed support 1 needs to be replaced, the pushing plate 4 in the corresponding fixed cavity is pushed down, and after the pushing plate 4 is lowered, the movable rod 17 and the first connecting column 22 are lowered together, and the movable rod 17 is first in contact with the first connecting column 22, and the inclined column 27 is lowered, and the second inclined block 28 is moved in the connecting frame 21, and the second limiting column 29 is separated from the inclined pushing column 18, and when the second limiting column 29 is separated from the inclined pushing column 18, the pushing plate 4 is in contact with the second connecting column 23, and at this time, the first connecting column 22 and the second connecting column 23 are below the pushing plate 4, and after the second connecting column 23 is lowered, the inclined pushing column 18 and the first inclined block 12 are separated from each other, and when the movable rod 17 is lowered, the second rotating gear 16 is rotated, and the first rotating gear 15 is rotated to the side of the movable rod 17 through the action of the ratchet gear 25 and the limiting tooth block 26, so that the first rotating gear 15 drives the first inclined block 12 to move transversely in the fixed cavity through the first rack column 11, and the first limiting column 13 is separated from the first L-shaped column 5, so that the display screen is replaced, and at the same time, the fixing mechanism of other display screens on the same fixed support 1 is not loosened.

[0043] Certain exemplary embodiments of the present application have been described above by way of illustration, and it is to be understood that certain modifications can be made without departing from the spirit and scope of the application as set forth in the claims. Accordingly, the above description and drawings are to be construed in an illustrative, and not a restrictive, sense.

Claims

1. A fixing mechanism for multi-size display screens, comprising a fixing support (1) and a fixing frame (2), wherein a display screen (3) is disposed in the fixing frame (2), characterized in that: The fixed frame (2) is provided with a first L-shaped column (5), and the fixed support column (1) is provided with a fixed cavity. The fixed cavity is provided with a limiting component and a pushing component. The limiting component includes a second L-shaped column (6) and a first limiting column (13). The pushing component includes a pushing column (8). When multiple fixed frames (2) on the same fixed support column (1) enter the fixed cavity in sequence through the first L-shaped column (5), the first L-shaped column (5) contacts the second L-shaped column (6) under the action of gravity. After the first L-shaped column (5) moves down, it will charge the pushing component. After the last fixed frame (2) is fixed on the fixed support column (1), the pushing component will drive the first limiting column (13) to fix the first L-shaped column (5) through the pushing column (8).

2. The fixing mechanism for multi-size display screens according to claim 1, characterized in that: The pushing assembly also includes an air collection box (31) and a connecting pipe (9). One end of the connecting pipe (9) is connected to the second L-shaped column (6), and the other end extends into the air collection box (31). The air collection box (31) is provided with a piston plate (32) and a regulating valve (33), and the piston plate (32) is fixedly connected to the pushing column (8).

3. The fixing mechanism for multi-size display screens according to claim 2, characterized in that: The second L-shaped column (6) is provided with a piston chamber, and a push plate (34) is provided in the piston chamber. The piston chamber is connected to the gas collection box (31) through a connecting pipe (9).

4. The fixing mechanism for multi-size display screens according to claim 1, characterized in that: The fixed cavity is provided with a first sliding plate (7), a compression piston cylinder (10), a first rack column (11), a first fixed column (14) and a movable rod (17). The first sliding plate (7) is in contact with the first L-shaped column (5). A toggle plate (4) is provided on the side of the movable rod (17). A first inclined block (12) is provided on the first rack column (11). The first inclined block (12) is fixedly connected to the first limiting column (13).

5. A fixing mechanism for multi-size display screens according to claim 4, characterized in that: The first fixed column (14) is provided with a first rotating gear (15) and a second rotating gear (16), and the first rotating gear (15) and the second rotating gear (16) are in contact with each other. The first rotating gear (15) is provided with a ratchet (25), and the second rotating gear (16) is provided with a limiting tooth block (26).

6. A fixing mechanism for multi-size display screens according to claim 5, characterized in that: The movable rod (17) is provided with a first return spring (19), the first rack column (11) is meshed with the first rotating gear (15), and the side of the movable rod (17) is meshed with the second rotating gear (16).

7. A fixing mechanism for multi-size display screens according to claim 4, characterized in that: A connecting frame (21) is provided on the side of the pushing column (8), and a slanted pushing column (18) and a slanted column (27) are provided in the connecting frame (21). The upper end of the slanted pushing column (18) is in sliding contact with the first slanted block (12).

8. A fixing mechanism for multi-size display screens according to claim 7, characterized in that: The connecting frame (21) is provided with a second inclined block (28), and a second limiting post (29) is provided on the second inclined block (28). The inclined push post (18) is provided with a limiting groove (30) that matches the second limiting post (29). The second inclined block (28) and the inclined post (27) slide in contact through the inclined surface.

9. A fixing mechanism for multi-size display screens according to claim 8, characterized in that: The inclined column (27) is provided with a first connecting column (22), and the inclined push column (18) is provided with a second connecting column (23). The horizontal height of the first connecting column (22) is higher than that of the second connecting column (23). Both the first connecting column (22) and the second connecting column (23) are located below the toggle plate (4). A second sliding plate (24) is provided below the second connecting column (23), and a second reset spring (20) is provided below the second sliding plate (24).

10. A display device, characterized in that: Includes a fixing mechanism for multi-size display screens as described in any one of claims 1-9.