An automatic screen detection device based on an LED display screen

Abstract

This utility model relates to the field of automatic screen detection technology, including a workbench, an automatic screen detection device for LED displays, a fixed frame, a sliding frame, slidably mounted on the outer wall of a support plate; a placement plate for placing the screen to be tested, fixedly mounted on the top of the workbench; a contact for touch screen testing, fixedly mounted on the bottom of the placement plate; and a fixing device for clamping the screen, located on the top of the workbench. The fixing device can switch between a first state and a second state. In the first state, the fixing device fixes the screen on the surface of the placement plate. In the second state, the fixing device engages with the screen on the surface of the placement plate, and a connecting rod pushes the clamping plate and the fixed plate to fix the screen. This allows the contact to move downwards and automatically clamp the screen during testing, achieving simultaneous detection and fixing, reducing manual operation steps.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to an automatic screen detection device based on an LED display screen. Background Technology

[0002] LED touchscreen technology combines the high brightness and high contrast advantages of traditional LED displays with touch interaction capabilities, and is widely used in smart terminals, educational equipment, commercial displays, industrial control, and other fields. As users' demands for interactive experiences increase, touchscreen LED displays need to simultaneously meet the dual standards of display quality and touch accuracy, making their testing requirements more complex.

[0003] In existing technologies, such as Chinese Patent No. CN204719366U, the screen detection device includes a screen detection base fixed to the chassis table. The screen detection base has a screen detection vertical rod, a trapezoidal screen detection clamp is installed at the lower part of the vertical rod, and a screen detection tray is fixedly installed on the trapezoidal clamp. A screen detection block is fixedly installed at the upper part of the vertical rod, a screen detection horizontal rod is installed on the clamp, and a screen detection fixing plate is installed on the horizontal rod. Screen detection CCD image sensors are arranged side-by-side on the fixing plate, correspondingly positioned above the screen detection tray. This invention features a compact structure, is easy to manufacture, simple to operate, has high assembly precision, and good consistency. It reduces the labor intensity of operators, ensures their personal safety, and improves production efficiency.

[0004] While the above solutions offer advantages, they also have disadvantages. Although current technology offers many advantages, it lacks an automatic clamping and fixing function. When the testing probes apply pressure to the screen, the lack of a synchronous fixing mechanism makes the screen prone to displacement or shaking due to external forces, leading to inaccurate test data and potentially damaging the screen surface due to excessive pressure. Furthermore, the lack of limit protection mechanisms in traditional equipment makes it susceptible to excessive compression or insecure fixing during clamping. This not only fails to prevent screen deformation and damage under pressure but also makes it difficult to maintain a stable testing environment, ultimately affecting the reliability of the test results. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic screen detection device based on an LED display screen, comprising a workbench, and the automatic screen detection device for the LED display screen further comprising:

[0007] A fixed frame is fixedly installed on the top of the workbench. An electric push rod is fixedly installed on the top of the inner wall of the fixed frame. A support plate is slidably installed on the inner wall of the fixed frame. The support plate is fixedly connected to the output end of the electric push rod.

[0008] The sliding frame is slidably mounted on the outer wall of the support plate;

[0009] A mounting plate for placing the test screen is fixedly installed on top of the workbench;

[0010] The contact points used for touch screen testing are fixedly installed at the bottom of the placement plate;

[0011] A clamping device for holding the screen is located on the top of the worktable;

[0012] The fixing device can switch between a first state and a second state. In the first state, the fixing device fixes the screen on the surface of the placement board, and in the second state, the fixing device releases the fixation of the screen on the surface of the placement board.

[0013] A limiting device for restricting the placement plate is installed on the outer wall of the placement plate.

[0014] In a preferred embodiment, the fixing device includes:

[0015] A fixing plate is slidably mounted on the surface of the placement plate, and a clamping plate is slidably mounted on the side of the fixing plate near the electric push rod;

[0016] A sliding rod slides through an outer wall of a fixed plate, and the sliding rod is fixedly connected to a clamping plate.

[0017] A sliding plate is slidably mounted on the top of the placement plate, and the sliding plate is fixedly connected to the fixed plate.

[0018] One end of the connecting rod is rotatably connected to the bottom of the support plate, and a sliding block is slidably installed on the top of the sliding plate. The other end of the connecting rod is rotatably connected to the sliding block. A spring is provided between the fixed plate and the clamping plate.

[0019] The technical effect of adopting the above-mentioned further solution is that the sliding plate is moved by the linkage, and the sliding plate moves towards the fixed plate in the direction of the screen, thereby fixing the screen.

[0020] In a preferred embodiment, the fixing device further includes:

[0021] Fixed plate two is slidably installed on top of the placement plate;

[0022] One end of the connecting rod is rotatably connected to the bottom of the first fixed plate, and the other end of the connecting rod is rotatably connected to the bottom of the second fixed plate.

[0023] The technical effect of adopting the above-mentioned further solution is that the movement of the fixed plate will drive the connecting rod to move, and the movement of the connecting rod will pull the fixed plate two to move towards the screen, thereby strengthening the fixation of the screen and making the detection more accurate.

[0024] In a preferred embodiment, the fixing device further includes:

[0025] The sliding block is slidably mounted on one side of the fixed plate near the sliding plate;

[0026] A sliding key slides through the top of the sliding block, wherein the top of the sliding block is a slope.

[0027] The placement plate has a limiting groove on its surface, and the shape of the sliding key matches the limiting groove.

[0028] The technical effect of adopting the above-mentioned further solution is that the sliding rod will contact the inclined surface of the sliding block when it moves. After the sliding rod contacts the inclined surface, it will push the sliding block to move downward. The downward movement of the sliding block will push the sliding key to move, so that the sliding key is inserted into the limiting groove to limit the fixed plate.

[0029] In a preferred embodiment, the fixing device further includes:

[0030] The push plate is slidably mounted on top of the sliding plate;

[0031] The push rod is slidably mounted on the top of the sliding plate;

[0032] A limiting rod is slidably mounted on the top of the sliding plate, and the limiting rod is fixedly connected to the push rod.

[0033] The push plate and the push rod are positioned on opposite sides with an inclined surface, and a spring is provided between the push rod and the sliding plate.

[0034] The technical effect of adopting the above-mentioned further solution is that: when the push plate moves, it will come into contact with the inclined surface of the push rod, and the push rod will be pushed. The movement of the push rod will drive the limit rod to move, and the limit rod's restriction on the sliding block will be released.

[0035] In a preferred embodiment, the fixing device further includes:

[0036] The positioning plate is fixedly installed on the top of the sliding plate;

[0037] The telescopic rod is fixedly installed on the side of the positioning plate near the limit rod;

[0038] A sliding plate is slidably mounted on top of a sliding board, and the sliding plate is fixedly connected to the movable end of a telescopic rod.

[0039] Among them, a third spring is provided between the positioning plate and the sliding plate, and the elastic coefficient of the third spring is greater than that of the first spring.

[0040] The technical effect of adopting the above-mentioned further solution is that by providing a spring between the positioning plate and the slide plate, it is possible to continue to provide a forward thrust to the fixed plate when the sliding block pushes the slide plate to move, so that the fixed plate remains in its original position.

[0041] In a preferred embodiment, the limiting device includes:

[0042] A sliding sleeve is slidably mounted on the outer wall of the contact.

[0043] The sliding rod is slidably mounted on the outer wall of the contact.

[0044] The slider is slidably mounted on the outer wall of the contact. One end of the sliding rod is fixedly connected to the sliding sleeve, and the other end of the sliding rod is fixedly connected to the slider.

[0045] The technical effect of adopting the above-mentioned further solution is that the movement of the sliding sleeve can push the movement of the sliding rod, the movement of the sliding rod can push the slider to move, and the movement of the slider can release the limit on the sliding frame.

[0046] In a preferred embodiment, the limiting device further includes:

[0047] The limiting block slides through the outer wall of the sliding frame;

[0048] The support plate has a slot on the side near the limiting block, the limiting block contacts the inner wall of the slot, and a spring is provided between the limiting block and the sliding frame.

[0049] The technical effect of adopting the above-mentioned further solution is that the fourth spring is used so that after the slider pushes the limit block to release the limit on the sliding frame, when the slider is reset, the fourth spring will drive the limit block to reset.

[0050] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0051] 1. This utility model uses a connecting rod to push the clamping plate and the fixing plate to fix the screen, so that the screen can be automatically clamped when the contact moves downward to detect the screen, realizing the simultaneous detection and fixing, reducing manual operation steps. At the same time, the connecting rod pulls the fixing plate to clamp synchronously, forming a two-way fixation, ensuring that the screen will not shift or shake due to pressure when the contact is detected, thus improving the detection accuracy.

[0052] 2. In this utility model, after the sliding key contacts the inner wall of the limiting groove, it can limit the fixed plate one, preventing the sliding plate from continuing to push the fixed plate one to move, thereby ensuring that the fixed plate one is kept in the predetermined position. This avoids the clamping plate from being accidentally released from the screen, ensuring that the screen is stable and does not shift or get damaged. The sliding plate can compress the spring three, which plays a buffering role, preventing the fixed plate one from being pushed further, avoiding excessive squeezing or unnecessary pressure on the screen, and maintaining the safety of the device.

[0053] 3. In this utility model, the sliding bracket can drive the contact to move when the contact is in contact with the screen, which avoids the contact moving when it is in contact with the screen. If the contact is not in complete contact with the screen, the touch sensor may not be able to detect the position of the touch point correctly, thus generating incorrect touch data. This will affect the response accuracy of the device and may cause the touch input to be not correctly recognized or misidentified as an incorrect touch point. Attached Figure Description

[0054] Figure 1 A schematic diagram of the main structure of an automatic screen detection device based on an LED display screen provided by this utility model;

[0055] Figure 2 A schematic diagram showing the positional structure of the fixing plate and the clamping plate provided by this utility model;

[0056] Figure 3 This is a schematic diagram showing the positional structure of the connecting rod and the fixing plate 2 provided by this utility model;

[0057] Figure 4 A schematic diagram of the positional structure of the sliding block and sliding frame provided by this utility model;

[0058] Figure 5 A schematic diagram showing the positional structure of the sliding sleeve and sliding rod provided by this utility model;

[0059] Figure 6 A schematic diagram of the position structure of the slider and the limiting block provided by this utility model.

[0060] Legend:

[0061] 1. Workbench; 2. Fixing frame; 3. Electric push rod; 4. Support plate; 5. Sliding frame; 6. Placement plate; 7. Contact head; 8. Fixing plate one; 9. Clamping plate; 10. Connecting rod; 11. Sliding plate; 12. Sliding rod; 13. Fixing plate two; 14. Connecting rod; 21. Sliding block; 22. Sliding key; 23. Push plate; 24. Push rod; 25. Limiting rod; 26. Slide plate; 27. Positioning plate; 28. Telescopic rod; 31. Sliding sleeve; 32. Sliding rod; 33. Slider; 34. Limiting block. Detailed Implementation

[0062] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0063] Example 1:

[0064] Please see Figures 1-6 This embodiment provides an automatic screen detection device for LED displays that can fix the screen while detecting it. The specific idea is as follows:

[0065] An automatic screen testing device for LED displays includes a worktable 1, a fixing device and a fixing frame 2, an electric push rod 3, a support plate 4, a sliding frame 5, a placement plate 6, and a contact 7.

[0066] Among them, the fixed frame 2 is fixedly installed on the top of the workbench 1, the electric push rod 3 is fixedly installed on the top of the inner wall of the fixed frame 2, the support plate 4 is slidably installed on the inner wall of the fixed frame 2, and the support plate 4 is fixedly connected to the output end of the electric push rod 3.

[0067] The sliding frame 5 is slidably mounted on the outer wall of the support plate 4. The placement plate 6, used to place the screen to be tested, is fixedly mounted on the top of the workbench 1. The contact 7, used to perform touch screen testing on the screen, is fixedly mounted on the bottom of the placement plate 6. The fixing device for clamping the screen is set on the top of the workbench 1.

[0068] The fixing device can switch between a first state and a second state. In the first state, the fixing device fixes the screen on the surface of the placement plate 6. In the second state, the fixing device releases the fixation of the screen on the surface of the placement plate 6.

[0069] A limiting device for restricting the placement plate 6 is provided on the outer wall of the placement plate 6.

[0070] As examples, in this embodiment, the fixing device includes a fixing plate 8, a clamping plate 9, a connecting rod 10, a sliding plate 11, a sliding rod 12, a fixing plate 13, and a connecting rod 14.

[0071] Among them, the fixing plate 8 slides on the surface of the placement plate 6, and the clamping plate 9 is slidably installed on the side of the fixing plate 8 near the electric push rod 3;

[0072] The sliding rod 12 slides through the outer wall of the fixed plate 8 and is fixedly connected to the clamping plate 9. The sliding plate 11 is slidably installed on the top of the placement plate 6 and is fixedly connected to the fixed plate 8.

[0073] One end of the connecting rod 10 is rotatably connected to the bottom of the support plate 4, and a sliding block is slidably installed on the top of the sliding plate 11. The other end of the connecting rod 10 is rotatably connected to the sliding block. A spring is provided between the fixed plate 8 and the clamping plate 9. The spring is provided to facilitate retraction when clamping the screen and avoid damage to the screen.

[0074] The fixed plate 13 is slidably placed on the top of the placement plate 6. One end of the connecting rod 14 is rotatably connected to the bottom of the fixed plate 8, and the other end of the connecting rod 14 is rotatably connected to the bottom of the fixed plate 13.

[0075] In this embodiment, the fixed plate 13 and the clamping plate 9 move towards the screen at the same time to fix the screen, so that the screen will not move due to the contact of the contact 7 during the test. The support plate 4 pushes the clamping plate 9 and the fixed plate 13 to fix the screen through the connecting rod 10, so that the contact 7 can automatically clamp the screen when it moves downward to test the screen, realizing the simultaneous performance of testing and fixing, and reducing manual operation steps.

[0076] Working principle: When touch screen testing is required, the screen needs to be placed on the surface of the placement plate 6. After placement, the electric push rod 3 will be activated, and the output end of the electric push rod 3 will extend to push the support plate 4 downward. The downward movement of the support plate 4 will drive the sliding frame 5 to move, and the movement of the sliding frame 5 will drive the contact 7 to move. The contact 7 will contact the screen surface. After contact, the sliding frame 5 will drive the contact 7 to move laterally to test the screen. When the support plate 4 moves downward, it will push the connecting rod 10 to move, and the movement of the connecting rod 10 will push the sliding plate 11 to move. The movement of the sliding plate 11 will push the fixed plate 8 to move, and the movement of the fixed plate 8 will push the sliding rod 12 to move. The movement of the sliding rod 12 will push the clamping plate 9 to move towards the screen. Simultaneously, the movement of the first fixing plate 8 will drive the connecting rod 14 to move, and the movement of the connecting rod 14 will pull the second fixing plate 13 to move towards the screen. The simultaneous movement of the second fixing plate 13 and the clamping plate 9 towards the screen will fix the screen, preventing the screen from moving due to contact with the contact 7 during testing. The support plate 4 pushes the clamping plate 9 and the second fixing plate 13 to fix the screen through the connecting rod 10, so that the contact 7 can automatically clamp the screen when it moves downward to test the screen, realizing the synchronous operation of testing and fixing, reducing manual operation steps. At the same time, the connecting rod 14 pulls the second fixing plate 13 to clamp synchronously, forming a two-way fixation, ensuring that the screen will not shift or shake due to pressure when the contact 7 is tested, thus improving the testing accuracy.

[0077] Example 2:

[0078] like Figures 1-6 As shown in Example 1, this example also provides an automatic screen detection device for LED displays that avoids excessive clamping of the screen. The specific idea is as follows:

[0079] The fixing device set on the top of the workbench 1 also includes: a sliding block 21, a sliding key 22, a push plate 23, a push rod 24, a limit rod 25, a sliding plate 26, a positioning plate 27, and a telescopic rod 28.

[0080] The sliding block 21 is slidably installed on the side of the fixed plate 8 near the sliding plate 11. The sliding key 22 slides through the top of the sliding block 21, wherein the top of the sliding block 21 is set as an inclined surface.

[0081] It should be noted that a limiting groove is provided on the surface of the placement plate 6, and the shape of the sliding key 22 matches the limiting groove.

[0082] The push plate 23 is slidably mounted on the top of the sliding plate 11, the push rod 24 is slidably mounted on the top of the sliding plate 11, and the limit rod 25 is slidably mounted on the top of the sliding plate 11. The limit rod 25 is fixedly connected to the push rod 24.

[0083] In this embodiment, it should be noted that the side of the push plate 23 and the push rod 24 that are close to each other is set as an inclined surface, and a second spring is provided between the push rod 24 and the sliding plate 11. The second spring is provided to drive the push rod 24 to reset.

[0084] The positioning plate 27 is fixedly installed on the top of the sliding plate 11, the telescopic rod 28 is fixedly installed on the side of the positioning plate 27 near the limiting rod 25, the slide plate 26 is slidably installed on the top of the sliding plate 11, and the slide plate 26 is fixedly connected to the movable end of the telescopic rod 28.

[0085] It should be noted that a spring 3 is provided between the positioning plate 27 and the sliding plate 26. The purpose of providing spring 3 is to apply a continuous force to the fixed plate 8 when the sliding block pushes the sliding plate 26 to move. The elastic coefficient of spring 3 is greater than that of spring 1.

[0086] In this embodiment, after the sliding key 22 contacts the inner wall of the limiting groove, it can limit the fixed plate 8 and prevent the sliding plate 11 from continuing to push the fixed plate 8 to move, thereby ensuring that the fixed plate 8 is kept in the predetermined position. This avoids the clamp 9 from being accidentally released from fixing the screen, ensuring that the screen is stable and does not shift or get damaged.

[0087] Working principle: When the clamping plate 9 contacts the screen, the sliding plate 11 continuously pushes the fixed plate 8 towards the clamping plate 9. The clamping plate 9, due to the reaction force generated with the screen, pushes the sliding rod 12. The sliding rod 12 then pushes the push plate 23. The push plate 23 contacts the inclined surface of the sliding block 21, causing it to move downwards. This downward movement of the sliding block 21 moves the sliding key 22, which then contacts the inner wall of the limiting groove. The sliding key 22 then limits the fixed plate 8, preventing the sliding plate 11 from pushing it further. The push plate 23 then contacts the inclined surface of the push rod 24, pushing it away from the sliding plate 11. This movement of the push rod 24 moves the limiting rod 25, releasing the obstruction to the sliding block. The connecting rod 10 then pushes... The sliding block moves towards the slide plate 26 and comes into contact with it. The movement of the sliding block pushes the slide plate 26 towards the positioning plate 27, causing the slide plate 26 to compress the spring 3 and contract, preventing continuous pressure on the fixed plate 8. The spring 3, pressed by the slide plate 26, keeps the fixed plate 8 in place, preventing it from moving and thus preventing the clamp 9 from releasing the screen. After the sliding key 22 contacts the inner wall of the limiting groove, it limits the fixed plate 8, preventing the sliding plate 11 from continuing to push it, thus ensuring the fixed plate 8 remains in the predetermined position. This prevents the clamp 9 from accidentally releasing the screen, ensuring the screen remains stable and does not shift or get damaged. The slide plate 26 compresses the spring 3, providing a buffer and preventing the fixed plate 8 from being pushed further, avoiding excessive pressure or unnecessary stress on the screen, and maintaining the safety of the device.

[0088] Example 3:

[0089] like Figures 1-6 As shown, based on Embodiment 1, this embodiment also provides an automatic screen detection device to avoid detecting LED displays that begin to move before contacting the screen. The specific idea is as follows:

[0090] The automatic screen detection device for this LED display also includes a limit device.

[0091] As examples, in this embodiment, the limiting device also includes a sliding sleeve 31, a sliding rod 32, a slider 33, and a limiting block 34.

[0092] The sliding sleeve 31 is slidably installed on the outer wall of the contact 7, the sliding rod 32 is slidably installed on the outer wall of the contact 7, the slider 33 is slidably installed on the outer wall of the contact 7, one end of the sliding rod 32 is fixedly connected to the sliding sleeve 31, the other end of the sliding rod 32 is fixedly connected to the slider 33, and the limiting block 34 slides through the outer wall of the sliding frame 5.

[0093] It should also be noted that the support plate 4 has a slot on the side near the limiting block 34, the limiting block 34 contacts the inner wall of the slot, and a spring 4 is provided between the limiting block 34 and the sliding frame 5. The spring 4 is provided to drive the limiting block 34 to reset.

[0094] In this embodiment, the movement of slider 33 will push limit block 34 to move away from support plate 4, and the limit block 34 will release the limit on sliding frame 5, so that when contact 7 contacts the screen, sliding frame 5 can drive contact 7 to move, avoiding contact 7 from starting to move when it is in contact with the screen. If contact 7 does not fully contact the screen, the touch sensor may not be able to detect the position of the touch point correctly, thus generating incorrect touch data.

[0095] Working principle: When the support plate 4 moves the contact 7 downward, it will drive the sliding sleeve 31 to move. The sliding sleeve 31 will make contact with the screen. After the sliding sleeve 31 makes contact with the screen, the contact 7 continues to move downward, and the sliding sleeve 31 will slide towards the limiting block 34. The sliding sleeve 31 will push the sliding rod 32 to move. The sliding rod 32 will push the slider 33 to move towards the limiting block 34. The slider 33 will push the limiting block 34 to move away from the support plate 4. Then the limiting block 34 will release the limitation on the sliding frame 5, so that when the contact 7 makes contact with the screen, the sliding frame 5 can drive the contact 7 to move. This avoids the contact 7 starting to move when it is in contact with the screen. If the contact 7 does not make complete contact with the screen, the touch sensor may not be able to detect the position of the touch point correctly, thus generating incorrect touch data. This will affect the response accuracy of the device and may cause the touch input to be not correctly recognized or misidentified as an incorrect touch point.

[0096] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0097] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A screen automatic detection device based on LED display screen, comprising a workbench (1), characterized in that, The automatic screen detection device for LED displays also includes: A fixed frame (2) is fixedly installed on the top of the workbench (1). An electric push rod (3) is fixedly installed on the top of the inner wall of the fixed frame (2). A support plate (4) is slidably installed on the inner wall of the fixed frame (2). The support plate (4) is fixedly connected to the output end of the electric push rod (3). The sliding frame (5) is slidably mounted on the outer wall of the support plate (4); The placement plate (6) used to place the test screen is fixedly installed on the top of the workbench (1); The contact (7) used for touch screen testing is fixedly installed at the bottom of the placement plate (6); A fixing device for clamping the screen is provided on the top of the worktable (1); The fixing device can switch between a first state and a second state. In the first state, the fixing device will fix the screen on the surface of the placement plate (6), and in the second state, the fixing device will release the fixation of the screen on the surface of the placement plate (6). A limiting device for restricting the placement plate (6) is provided on the outer wall of the placement plate (6). 2.The LED display screen based screen automatic detection device according to claim 1, characterized in that, The fixing device includes: Fixed plate 1 (8) is slidably mounted on the surface of placement plate (6), and a clamping plate (9) is slidably mounted on the side of fixed plate 1 (8) near electric push rod (3); The slide rod (12) slides through the outer wall of the fixed plate (8), and the slide rod (12) is fixedly connected to the clamping plate (9); A sliding plate (11) is slidably mounted on the top of the placement plate (6), and the sliding plate (11) is fixedly connected to the fixed plate (8); One end of the connecting rod (10) is rotatably connected to the bottom of the support plate (4), and a sliding block is slidably installed on the top of the sliding plate (11). The other end of the connecting rod (10) is rotatably connected to the sliding block. A spring is provided between the fixed plate (8) and the clamping plate (9).

3. The automatic screen detection device based on an LED display screen according to claim 2, characterized in that, The fixing device also includes: Fixed plate 2 (13) is slidably mounted on top of placement plate (6); One end of the connecting rod (14) is rotatably connected to the bottom of the first fixing plate (8), and the other end of the connecting rod (14) is rotatably connected to the bottom of the second fixing plate (13).

4. The automatic screen detection device based on an LED display screen according to claim 3, characterized in that, The fixing device also includes: The sliding block (21) is slidably mounted on the side of the fixed plate (8) near the sliding plate (11); The sliding key (22) slides through the top of the sliding block (21), wherein the top of the sliding block (21) is set as a slope; The placement plate (6) has a limiting groove on its surface, and the sliding key (22) has an outline that matches the limiting groove.

5. The automatic screen detection device based on an LED display screen according to claim 4, characterized in that, The fixing device also includes: Push plate (23) is slidably mounted on top of sliding plate (11); The push rod (24) is slidably mounted on the top of the sliding plate (11); The limiting rod (25) is slidably mounted on the top of the sliding plate (11), and the limiting rod (25) is fixedly connected to the push rod (24); The push plate (23) and the push rod (24) are inclined on the side that are close to each other, and a spring is provided between the push rod (24) and the sliding plate (11).

6. The automatic screen detection device based on an LED display screen according to claim 5, characterized in that, The fixing device also includes: Positioning plate (27) is fixedly installed on the top of sliding plate (11); The telescopic rod (28) is fixedly installed on the side of the positioning plate (27) near the limiting rod (25); A sliding plate (26) is slidably mounted on top of a sliding plate (11), and the sliding plate (26) is fixedly connected to the movable end of a telescopic rod (28); Among them, a third spring is provided between the positioning plate (27) and the sliding plate (26), and the elastic coefficient of the third spring is greater than that of the first spring.

7. The automatic screen detection device based on an LED display screen according to claim 6, characterized in that, The limiting device includes: The sliding sleeve (31) is slidably mounted on the outer wall of the contact (7); The sliding rod (32) is slidably mounted on the outer wall of the contact (7); The slider (33) is slidably mounted on the outer wall of the contact (7). One end of the sliding rod (32) is fixedly connected to the sliding sleeve (31), and the other end of the sliding rod (32) is fixedly connected to the slider (33).

8. The automatic screen detection device based on an LED display screen according to claim 6, characterized in that, The limiting device also includes: Limiting block (34) slides through the outer wall of sliding frame (5); The support plate (4) has a slot on the side near the limiting block (34), the limiting block (34) is in contact with the inner wall of the slot, and a spring is provided between the limiting block (34) and the sliding frame (5).

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