A vehicle-mounted display screen aging test device

Abstract

The application provides a kind of vehicle display screen aging test device, it is arranged as rolling pressure structure to pressure head, based on bearing, elastic block is installed on the horizontal part of rolling support shaft, when needing to be pressed to the product to be tested, the vertical part of rolling support shaft is rotated, the pressure head is turned to the edge of the display screen to be tested, the elastic block is contacted with the edge of the display screen to be tested, even if the edge of the display screen to be tested is higher at this time, the cylindrical elastic block rolls with the horizontal part of rolling support shaft as the axis, to ensure that the edge of the display screen to be tested can be gradually pressed down;The contact position of the display screen to be tested is deformed during the rolling process of the elastic block, and there is no rigid contact with the display screen, so the edge of the display screen is not damaged.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle display screen testing equipment, specifically a vehicle display screen aging testing device. Background Technology

[0002] During the production process, automotive displays require aging tests. Aging tests for automotive electronic devices aim to evaluate their reliability and performance under long-term use and extreme environmental conditions. The aging test cycle typically ranges from several weeks to several months. An existing automotive display aging test device includes: a base; a set of test interfaces that connect to multiple interfaces on the back of the product; and data transmission and power supply to the display during testing. In this embodiment, the automotive display has a rectangular structure. Resin positioning structures are distributed at the four corners of the display. The rectangle formed by the four positioning structures is adapted to the size of the automotive display.

[0003] During testing, the vehicle-mounted display screen under test is positioned using a positioning structure at its top corner. After positioning, the data interface on the back of the display screen should align with the test interface. Pressing down on the display screen establishes data interface connection. However, because there is no locking structure at the data interface, a downward clamping force is applied to the display screen from above after connection to ensure stable connection during testing. The testing device provides downward clamping force to the display screen through a clamping structure.

[0004] The vehicle-mounted display screen has a metal edge. The clamping structure includes a clamping head and a rotating support column. The clamping head is rotatably mounted on the rotating support column via a connecting plate and is a vertically downward cylindrical structure. Once the vehicle-mounted display screen data interface is connected, the clamping heads at the four corners are rotated inward. Because the display screen edge is a curved surface with a lower outer edge and a higher inner edge, as the clamping heads rotate towards the display screen, they can gradually press down on the display screen edge, ultimately clamping the vehicle-mounted display screen onto the test interface.

[0005] However, in actual use, it was found that because the clamping head contacts the edge of the display screen based on rigid friction during rotation, it is easy to scratch the edge of the display screen if the operator is not careful, resulting in paint chipping. For some products, such as an 8-inch screen from a certain brand, the paint chipping rate is >3.5%, which significantly affects the product yield. Summary of the Invention

[0006] To address the problem that the clamping structure of existing vehicle display screen aging test devices easily damages the product, this utility model provides a vehicle display screen aging test device that will not damage the product during use.

[0007] The structure of this utility model is as follows: an aging test device for a vehicle display screen, comprising: a base, a test interface, a positioning structure, and a clamping structure, wherein the test interface, the positioning structure, and the clamping structure are disposed on the upper surface of the base; The clamping structure is characterized by comprising: a rolling support shaft, a mounting base, and a clamping head; The mounting base is disposed on the upper end face of the base; The rolling support shaft includes: an integrally formed horizontal part and a vertical part; the vertical part is disposed perpendicular to the upper end surface of the base and is rotatably mounted on the mounting base; The clamping head includes an elastic block and a bearing, wherein the elastic block is cylindrical and is rolled on the horizontal part of the rolling support shaft based on the bearing; At least four clamping heads are provided, evenly distributed around the outer edges of the display screen to be tested.

[0008] Its further features are: The clamping structure further includes a spring and a limiting ring. A vertical spring cavity is formed inside the mounting base. The inlet size of the spring cavity is adapted to the vertical size of the rolling support shaft. The inner diameter of the spring cavity is larger than the inlet size of the spring cavity. The outer diameter of the limiting ring is adapted to the inner diameter of the spring cavity; The vertical part of the rolling support shaft is inserted into the spring cavity, and the limiting ring is fitted onto the bottom end of the vertical part of the rolling support shaft; The spring is disposed in the spring cavity and fitted onto the outer periphery of the vertical part of the rolling support shaft. The upper and lower ends of the spring respectively press against the upper end face of the spring cavity and the limiting ring. The clamping structure further includes: a support base, which is a cylindrical structure with an inner cavity diameter adapted to the vertical dimension of the rolling support shaft; the support base is installed on the upper end face of the mounting base, and its inner cavity is connected to the spring cavity of the mounting base; The support base has a U-shaped opening on one side facing the display screen to be tested, and the opening size is greater than or equal to the diameter of the horizontal part of the rolling support shaft; the height of the support base is less than the length of the vertical part of the rolling support shaft. The positioning structure is an L-shaped structure, distributed at the four apex corners of the display screen to be tested, and the four L-shapes form the four apex corners of a rectangle; The top of the positioning structure, which faces the display screen under test, is provided with a guide slope that is narrower at the bottom and wider at the top; The support base and the mounting base are fixedly connected.

[0009] This application provides an aging test device for vehicle-mounted displays. The clamping head is configured as a rolling clamping structure, and an elastic block is mounted on the horizontal part of a rolling support shaft based on a bearing. When the product to be tested needs to be clamped, the vertical part of the rolling support shaft is rotated, turning the clamping head towards the edge of the display screen to be tested. The elastic block contacts the edge of the display screen. Even if the edge of the display screen is high at this time, the cylindrical elastic block rolls around the horizontal part of the rolling support shaft, ensuring that the edge of the display screen to be tested can be gradually pressed down. During the rolling process, the contact position of the elastic block with the display screen will deform, and there is no rigid contact with the display screen, so the edge of the display screen will not be damaged. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the aging test device for vehicle-mounted displays in this application; Figure 2 This is a three-dimensional structural diagram of the clamping structure in this application; Figure 3 This is a cross-sectional schematic diagram of the clamping structure in the case of the clamping head being lifted in this application. Figure 4 This is a cross-sectional schematic diagram of the clamping structure in the state where the clamping head is clamping the display screen in this application. Detailed Implementation

[0011] like Figures 1-4 As shown, this application includes an aging test device for an in-vehicle display screen, comprising: a base 1, a test interface 2, a positioning structure 3, and a clamping structure 4. The test interface 2, positioning structure 3, and clamping structure 4 are disposed on the upper surface of the base 1. Positioning bolt holes are provided on the base 1, and the base 1 can be fixed to the test platform by bolts 5 to prevent shaking during the test and subsequent test failure. The test interface 2 is based on existing technology.

[0012] The positioning structure 3 is an L-shaped structure, distributed at the four top corners of the display screen to be tested. The four L-shapes form the four top corners of a rectangle. The top of the part of the positioning structure 3 facing the display screen to be tested is provided with a guide slope 31 that is narrow at the bottom and wide at the top. The four guide slopes 31 form a rectangular shape that is narrow at the bottom and wide at the top. By setting the guide slopes 31, the vehicle display screen to be tested can be guided to be placed in the correct position, and at the same time, it can prevent damage to the shell of the vehicle display screen during the placement process.

[0013] Figure 1 In the test area 11, the protection zone for the display screen under test is located within a rectangular area formed by four positioning structures 3. Bolt holes are provided on the positioning structures 3, which are fixed to the upper surface of the base by positioning bolts 32. The position of the positioning structures 3 on the base can be adjusted according to the specific size and shape of the vehicle display screen being tested.

[0014] like Figure 2 , Figure 3 , Figure 4 As shown, the clamping structure 4 includes: a rolling support shaft 41, a clamping head, a limiting ring 43, a mounting base 45, a support base 46, and a spring 47.

[0015] Mounting base 45 is disposed on the upper end face of base 1; the rolling support shaft 41 includes: an integrally formed horizontal part and a vertical part; the vertical part is disposed perpendicular to the upper end face of base 1 and is rotatably mounted on mounting base 45. In specific implementation, mounting base 45 and positioning structure 3 are integrally formed, so that after fixing positioning structure 3 on base 1, mounting base 45 can be fixedly installed at the same time, and the position of mounting base 45 does not need to be adjusted.

[0016] The clamping head includes an elastic block 42 and a bearing 44. The elastic block 42 is cylindrical and is rolled on the horizontal part of the rolling support shaft 41 based on the bearing 44. At least four clamping heads are provided and evenly distributed on the outer periphery of the display screen to be tested. They can provide uniform clamping force to the display screen to be tested, so that the data interface of the display screen to be tested will not fall off during long-term testing.

[0017] The elastic block 42 is made of an elastic material such as rubber or silicone, which has a certain degree of hardness and can deform. In this embodiment, the clamping head is achieved by coating the surface of the bearing roller with a silicone rubber layer with a Shore hardness of 40±5. The bearing roller can float slightly with the position of the display screen, converting sliding friction into rolling friction, and can dynamically adapt to the height of the display screen being tested. To avoid stress concentration, the diameter of the bearing roller is set to 8mm in this embodiment.

[0018] A vertical spring cavity 48 is formed inside the mounting base 45. The inlet size of the spring cavity 48 is adapted to the vertical part size of the rolling support shaft 41. The inner diameter of the spring cavity 48 is larger than the inlet diameter of the spring cavity 48. The outer diameter of the limiting ring 43 is adapted to the inner diameter of the spring cavity 48. The vertical part of the rolling support shaft 41 is inserted into the spring cavity 48, and the limiting ring 43 is fitted onto the bottom end of the vertical part of the rolling support shaft 41.

[0019] Spring 47 is disposed in spring cavity 48 and fitted on the outer periphery of the vertical part of rolling support shaft 41. The upper and lower ends of spring 47 respectively press against the upper end face of spring cavity 48 and limiting ring 43.

[0020] The vertical portion of the rolling support shaft 41 is movably mounted in the spring cavity 48. The spring cavity 48 is a cylindrical cavity. A limiting ring 43 is disposed at the bottom of the vertical portion of the rolling support shaft 41, ensuring that the vertical portion of the rolling support shaft 41 can rotate within the spring cavity 38 and rotate in the vertical direction. Simultaneously, the spring 47, fitted onto the vertical portion of the rolling support shaft 41, provides a downward pulling force to the vertical portion of the rolling support shaft 41. In this embodiment, the spring preload is ≤5N.

[0021] In this embodiment, the support base 46 is fixedly installed above the mounting base 45. The inner diameter of the support base 46 is adapted to the vertical dimension of the rolling support shaft 41. The support base 46 is installed on the upper end face of the mounting base 45, and its inner cavity is connected to the spring cavity 48 of the mounting base 45. The bottom outlet of the support base 46 becomes the inlet of the spring cavity 43, so that both ends of the spring 47 simultaneously press against the bottom end face of the support base 46 and the upper end face of the limiting ring 43.

[0022] The support base 46 has a cylindrical structure. The support base 46 has a U-shaped opening 461 on the side facing the display screen to be tested. The size of the opening 461 is greater than or equal to the diameter of the horizontal part of the rolling support shaft 41.

[0023] When the rolling support shaft 41 is pulled up, the vertical part of the rolling support shaft faces upward, the spring 47 is compressed by the limiting ring 43, and simultaneously the horizontal part of the rolling support shaft 41 is rotated. This allows the horizontal part and the elastic block 42 to be pulled up and placed in a reverse position outside the opening 461 on the steering support seat 46. This ensures that the elastic block 42 will not interfere with the placement of the vehicle display screen under test into the test area 11 before the test begins, making this application more practical. Figure 3 As shown, the elastic block 42 is twisted to the opposite direction of the opening 461.

[0024] After the vehicle display screen to be tested is placed in the test area 11, the elastic block 42 is twisted to the angle of the opening 461. Due to the elastic force applied by the spring 47, the elastic block 42 will be pulled downwards until it presses against the edge of the vehicle display screen to be tested. Figure 4 As shown, four elastic blocks 42 together press against the edge of the vehicle display screen to be tested in the test area 11. The diameter and length of the elastic blocks 42, the length of the vertical and horizontal parts of the rolling support shaft 41, and the height of the U-shaped opening 461 on the support base 46 are adjusted according to the actual situation to ensure that the elastic blocks 42 can press against the display screen when they are turned to the display screen to be tested.

Claims

1. An aging test device for vehicle-mounted displays, comprising: The base includes a test interface, a positioning structure, and a clamping structure, wherein the test interface, the positioning structure, and the clamping structure are disposed on the upper surface of the base; The clamping structure is characterized by comprising: a rolling support shaft, a mounting base, and a clamping head; The mounting base is disposed on the upper end face of the base; The rolling support shaft includes: an integrally formed horizontal part and a vertical part; the vertical part is disposed perpendicular to the upper end surface of the base and is rotatably mounted on the mounting base; The clamping head includes an elastic block and a bearing, wherein the elastic block is cylindrical and is rolled on the horizontal part of the rolling support shaft based on the bearing; At least four clamping heads are provided, evenly distributed around the outer edges of the display screen to be tested.

2. The vehicle-mounted display screen aging test device according to claim 1, characterized in that: The clamping structure further includes a spring and a limiting ring. A vertical spring cavity is formed inside the mounting base. The inlet size of the spring cavity is adapted to the vertical size of the rolling support shaft. The inner diameter of the spring cavity is larger than the inlet size of the spring cavity. The outer diameter of the limiting ring is adapted to the inner diameter of the spring cavity; The vertical part of the rolling support shaft is inserted into the spring cavity, and the limiting ring is fitted onto the bottom end of the vertical part of the rolling support shaft; The spring is disposed in the spring cavity and fitted onto the outer periphery of the vertical part of the rolling support shaft. The upper and lower ends of the spring respectively press against the upper end face of the spring cavity and the limiting ring.

3. The vehicle-mounted display screen aging test device according to claim 2, characterized in that: The clamping structure further includes: a support base, which is a cylindrical structure with an inner cavity diameter adapted to the vertical dimension of the rolling support shaft; the support base is installed on the upper end face of the mounting base, and its inner cavity is connected to the spring cavity of the mounting base; The support base has a U-shaped opening on one side facing the display screen to be tested, and the opening size is greater than or equal to the diameter of the horizontal part of the rolling support shaft; the height of the support base is less than the length of the vertical part of the rolling support shaft.

4. The vehicle-mounted display screen aging test device according to claim 1, characterized in that: The positioning structure is an L-shaped structure, distributed at the four apex corners of the display screen to be tested, with the four L-shapes forming the four apex corners of a rectangle.

5. The vehicle-mounted display screen aging test device according to claim 1, characterized in that: The top of the positioning structure, which faces the display screen to be tested, is provided with a guide slope that is narrower at the bottom and wider at the top.

6. The vehicle-mounted display screen aging test device according to claim 3, characterized in that: The support base and the mounting base are fixedly connected.

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