A television back plate flatness rapid detection jig

Abstract

The application discloses a television backboard flatness quick detection jig, which comprises a jig body, an elastic flow guide layer, a containing groove, a clamping groove, a transparent fluid and an elastic flow guide layer. When the detection jig is placed on the television backboard and slides back and forth, if the detection surface of the backboard has a protrusion, the protrusion extrudes the elastic flow guide layer and locally embeds into the containing groove, so that the color layer is deformed at the corresponding position of the protrusion; if the detection surface of the backboard has a depression, the transparent fluid deforms and fills the elastic flow guide layer to the depression under the action of gravity, so that the color layer is deformed at the corresponding position of the depression. The utility model provides a television backboard flatness quick detection jig, which utilizes the interaction between the protrusion or depression of the backboard and the elastic flow guide layer and the transparent fluid to make the color layer directly deformed or discolored, so that the flatness of the backboard can be quickly judged.

Description

Technical Field

[0001] This utility model particularly relates to a rapid testing fixture for the flatness of a television back panel. Background Technology

[0002] As a core structural component of display devices, the flatness of the TV back panel directly affects the screen assembly precision and optical imaging quality. Currently, back panel flatness detection mainly relies on the following methods: Optical inspection method: Surface topography data is collected by laser scanning or CCD camera. Although the accuracy is high (up to ±0.01mm), the equipment cost is high (the price of a single device exceeds 500,000 yuan) and complex algorithms are required to process the data. Pressure sensor method: The pressure change at the contact surface between the back plate and the fixture is detected by a pressure distributor. This requires a dense array of sensors (≥100 measuring points), which makes the system complex and has high maintenance costs. Manual visual inspection: This method relies on the operator's touch or a magnifying glass to observe scratches and dents. It is highly subjective and has a false negative rate of up to 30%. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rapid testing fixture for the flatness of a television back panel.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution: A rapid testing fixture for the flatness of a television back panel includes: The fixture body has a slot inside, which is used to insert the TV back panel to be tested; An elastic guide layer is fixedly covered on the inner wall of the card slot, and a color layer is provided on the side surface of the elastic guide layer facing away from the card slot; A receiving groove is formed in the fixture body and is separated from the slot by the elastic flow guiding layer; the receiving groove is filled with transparent fluid, and the elastic flow guiding layer separates the receiving groove from the slot; When the testing fixture is placed on the TV back panel and slides back and forth: if there is a protrusion on the testing surface of the back panel, the protrusion squeezes the elastic guide layer and partially embeds into the receiving groove, causing the color layer to deform at the position corresponding to the protrusion; if there is a depression on the testing surface of the back panel, the transparent fluid pushes the elastic guide layer to deform and fill the depression under the action of gravity, causing the color layer to deform at the position corresponding to the depression.

[0005] Preferably, the transparent fluid is silicone oil or mineral oil.

[0006] Preferably, the fixture body is provided with a transparent observation window, the position of which corresponds to the area of ​​the color layer, for directly observing the deformation area of ​​the color layer caused by the protrusion or depression of the back plate.

[0007] Preferably, the color layer includes: A base coating is fixedly disposed on the surface of the elastic flow guiding layer; A pressure-sensitive color-changing layer covers the base coating; A transparent protective layer, transparent and covering the surface of the pressure-sensitive color-changing layer.

[0008] Preferably, the color-changing threshold of the pressure-sensitive color-changing layer is 0.05-0.3 MPa.

[0009] Preferably, the substrate coating is a modified polyurethane-acrylate composite coating.

[0010] Preferably, the transparent protective layer is a nano-reinforced polysiloxane film.

[0011] The beneficial effects of this utility model are: This invention provides a rapid testing fixture for the flatness of television back panels, enabling "one-slide judgment" testing with significant advantages. During testing, the operator simply places the fixture on the television back panel and slides it back and forth. Utilizing the interaction between the back panel's protrusions or depressions and the elastic guide layer and transparent fluid, the color layer undergoes a visually apparent deformation or color change at the corresponding position. The flatness of the back panel can then be quickly determined through a transparent observation window, greatly simplifying the testing process, reducing the skill requirements for operators, and decreasing the false negative rate. Furthermore, the use of a non-contact or flexible contact principle effectively protects the back panel from damage, and the pressure-sensitive color-changing layer can be reused, reducing testing costs. Compared to the high cost of optical testing methods, the system complexity of pressure sensor methods, and the high false negative rate of manual visual inspection, this invention's testing fixture provides a more economical and efficient testing solution, offering a new and reliable means of quality control in television production, which is beneficial for improving production efficiency and product quality. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram illustrating the use of a rapid testing fixture for the flatness of a television back panel according to this application. Figure 2 This is a schematic diagram of the structure of a rapid testing fixture for the flatness of a television back panel according to this application. Figure 1 ; Figure 3 This is a schematic diagram of the structure of a rapid testing fixture for the flatness of a television back panel according to this application. Figure 2 . Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0014] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.

[0015] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, soldering, snap-fitting, or embedding to suitably replace it.

[0016] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.

[0017] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.

[0018] The working principle of this utility model is as follows: First, referring to Figure 1, fix the TV back panel to be tested in the designated position with the test surface 1-1 facing upwards. The fixture body 1 has a slot 2 and an adjacent receiving groove 5 separated by an elastic guide layer 3. The elastic guide layer 3 is tightly fixed to the inner wall of the slot 2, and its surface facing away from the slot 2 is coated with a color layer 4. The structure of the color layer 4 is shown in Figure 3, including a base coating 41, a pressure-sensitive color-changing layer 42, and a transparent protective layer 43. The receiving groove 5 is filled with silicone oil (or mineral oil), and a sealing device ensures that the transparent fluid will not leak. When testing the TV back panel, align the testing fixture and place it on the TV back panel, so that the TV back panel is located in the slot 2. Then, slide the testing fixture back and forth left and right, while the TV back panel remains stationary. During the reciprocating motion of the testing fixture, if there are protrusions on the surface of the TV back panel, the protrusions will push up the elastic guide layer 3, causing it to bulge upwards locally. This will cause the color layer 4 on the surface of the elastic guide layer 3 to deform or change color at the corresponding position of the protrusion, resulting in a change in color or shape of the color layer 4. If there are depressions on the surface of the TV back panel, the transparent fluid inside the testing fixture will push the elastic guide layer 3 to deform and fill the depressions under the action of gravity. The color layer 4 on the surface of the elastic guide layer 3 will be deformed or changed color at the corresponding position of the depression, resulting in a change in color or shape of the color layer 4. The operator can directly observe the changes in the color layer 4 through the transparent observation window 9 and the transparent fluid (the transparent fluid cannot affect the color change, and the operator can directly see the color layer through the transparent fluid), thereby judging the flatness of the TV back panel and achieving "one-scratch judgment" testing, which greatly improves the testing efficiency and convenience.

[0019] In the above technical solution, the transparent fluid is silicone oil or mineral oil. These two transparent fluids have suitable fluidity, stability and lubricity, and can stably play their role in the elastic guide layer 3 during the detection process, pushing it to deform accurately into the recess of the back plate, while not causing adverse effects on the back plate and fixture, such as corrosion.

[0020] In the above technical solution, the fixture body 1 is provided with a transparent observation window 9. The position of the transparent observation window 9 corresponds to the area of ​​the color layer 4. Through the transparent observation window 9, the deformation area of ​​the color layer 4 caused by the protrusion or depression of the back plate can be directly observed, which makes it convenient for operators to quickly judge the flatness of the back plate without disassembly or other auxiliary tools, greatly improving the efficiency and convenience of the inspection.

[0021] Based on the above technical solution, the color layer 4 includes: Base coating 41: Fixedly disposed on the surface of the elastic flow guiding layer 3, it provides an adhesion base for the pressure-sensitive color-changing layer 42, ensuring the overall firmness of the color layer 4; the base coating 41 is a modified polyurethane-acrylate composite coating. This composite coating has good adhesion, flexibility and durability, and can be tightly bonded to the surface of the elastic flow guiding layer 3, while providing stable support for the pressure-sensitive color-changing layer 42, ensuring the performance stability and structural integrity of the color layer 4 during long-term use.

[0022] Pressure-sensitive color-changing layer 42: Covered on the base coating 41, it can change color when pressure is applied and can return to its original color when the pressure is removed, making it reusable, reducing testing costs, and making it easy to intuitively display the location of back panel flatness problems.

[0023] Transparent protective layer 43: Transparent and covering the surface of the pressure-sensitive color-changing layer 42, it protects the pressure-sensitive color-changing layer 42 from interference from external environmental factors such as dust, moisture, and scratches, extending the service life of the color layer 4 and ensuring the accuracy of the test results. The transparent protective layer 43 is a nano-reinforced polysiloxane film. This material has excellent transparency, wear resistance, chemical corrosion resistance, and scratch resistance. While providing good protection, it will not obstruct or interfere with the color change display effect of the pressure-sensitive color-changing layer 42, ensuring that operators can clearly and accurately observe the deformation area of ​​the color layer 4.

[0024] The color-changing threshold of the pressure-sensitive color-changing layer 42 is 0.05-0.3MPa. This range of color-changing thresholds can effectively correspond to the pressure changes caused by the flatness deviation that may occur in the actual production of the TV back panel. This ensures that the testing fixture is neither too sensitive and prone to misjudgment, nor too insensitive and misses the actual flatness problem, thereby guaranteeing the reliability of the test results.

[0025] This invention provides a rapid testing fixture for the flatness of television back panels, enabling "one-slide judgment" testing with significant advantages. During testing, the operator simply places the fixture on the television back panel and slides it back and forth. Utilizing the interaction between the back panel's protrusions or depressions and the elastic guide layer and transparent fluid, the color layer undergoes a visually apparent deformation or color change at the corresponding position. The flatness of the back panel can then be quickly determined through a transparent observation window, greatly simplifying the testing process, reducing the skill requirements for operators, and decreasing the false negative rate. Furthermore, the use of a non-contact or flexible contact principle effectively protects the back panel from damage, and the pressure-sensitive color-changing layer can be reused, reducing testing costs. Compared to the high cost of optical testing methods, the system complexity of pressure sensor methods, and the high false negative rate of manual visual inspection, this invention's testing fixture provides a more economical and efficient testing solution, offering a new and reliable means of quality control in television production, which is beneficial for improving production efficiency and product quality.

[0026] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. A television backboard flatness quick detection jig, characterized in that, Including: The fixture body (1) has a slot (2) inside, which is used to insert the TV back panel to be tested; An elastic guide layer (3) is fixedly covered on the inner wall of the card slot (2), and a color layer (4) is provided on the side surface of the elastic guide layer (3) facing away from the card slot (2). A receiving groove (5) is formed inside the fixture body (1) and is separated from the slot (2) by the elastic guide layer (3); the receiving groove (5) is filled with transparent fluid, and the elastic guide layer (3) separates the receiving groove (5) from the slot (2). When the testing fixture is placed on the TV back panel and slides back and forth: if there is a protrusion on the testing surface (1-1) of the back panel, the protrusion squeezes the elastic guide layer (3) and partially embeds into the receiving groove (5), causing the color layer (4) to deform at the position corresponding to the protrusion; if there is a depression on the testing surface (1-1) of the back panel, the transparent fluid pushes the elastic guide layer (3) to deform and fill the depression under the action of gravity, causing the color layer (4) to deform at the position corresponding to the depression.

2. The television backplane flatness quick detection jig according to claim 1, characterized in that, The transparent fluid is silicone oil or mineral oil.

3. The television backplane flatness quick detection jig according to claim 1, characterized in that, The fixture body (1) is provided with a transparent observation window (9), the position of which corresponds to the area of ​​the color layer (4), and is used to directly observe the deformation area of ​​the color layer (4) caused by the protrusion or depression of the back plate.

4. The television backplane flatness quick detection jig according to claim 1, characterized in that, The color layer (4) includes: A base coating (41) is fixedly disposed on the surface of the elastic flow guiding layer (3); A pressure-sensitive color-changing layer (42) covers the base coating (41); A transparent protective layer (43) is transparent and covers the surface of the pressure-sensitive color-changing layer (42).

5. The television backplane flatness quick detection jig according to claim 4, characterized in that, The color-changing threshold of the pressure-sensitive color-changing layer (42) is 0.05-0.3 MPa.

6. The television backplane flatness quick detection jig according to claim 4, characterized in that, The base coating (41) is a modified polyurethane-acrylate composite coating.

7. The television backplane flatness quick detection jig according to claim 4, characterized in that, The transparent protective layer (43) is a nano-reinforced polysiloxane film.

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