A display screen sealing test device

Abstract

This utility model discloses a display screen sealing performance testing device, belonging to the technical field of sealing performance testing devices. It includes a device body with a built-in air pump, a test chamber in the middle of the device body, an electric push rod, a positioning component, and an auxiliary sealing component installed at the bottom of the test chamber, a test air nozzle installed at the top output end of the electric push rod, and an air guide tube fixedly connected between the test air nozzle and the air pump. The positioning component fixes the back of the display screen, and the auxiliary sealing component seals the interface on the back of the display screen. During testing, the back of the display screen faces downwards, and the front is not subjected to downward pressure. The positioning suction cup acts on the back of the display screen, preventing changes in sealing performance due to fixation, thus greatly reducing testing errors. Positive pressure and negative pressure tests are performed separately. The positive pressure test effectively avoids testing errors caused by the frame and polarizer being tightly adhered during the negative pressure test.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing test devices, and in particular to a display screen sealing test device. Background Technology

[0002] The biggest bottleneck in bonding touchscreens to displays is the gap between the display's frame and the polarizer. Therefore, the sealing performance needs to be tested before the product is put on the market.

[0003] Regarding display screen sealing testing devices, a search reveals, for example, a liquid crystal display screen sealing inspection device provided by patent publication number CN209820716U, which includes a device body and a hole-plugging mechanism. The device body includes a vacuum platform for placing the liquid crystal display screen product. The surface of the vacuum platform is evenly provided with several vacuum exhaust holes. When plugging the holes, the hole-plugging mechanism covers part of the vacuum exhaust holes. A vacuum connector is provided on one side of the vacuum platform, which is connected to an external vacuum pump. A pressure platform is provided above the vacuum platform, which can meet the requirement of complete sealing of the testing environment, while effectively reducing equipment costs. The large-size vacuum platform and pressure platform can meet the testing of products of various sizes. The sealing ring on the product can effectively protect the product and shorten the product production cycle.

[0004] However, the aforementioned liquid crystal display sealing test device clamps both sides of the display screen. This clamping action causes the frame and polarizer to fit tightly together. This means that a display screen that might have poor sealing may be mistakenly tested as having good sealing under this clamping action, resulting in a large test error. Therefore, a display screen sealing test device is proposed to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this application is to provide a display screen sealing test device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a display screen sealing test device, comprising a device body with a built-in air pump, a test chamber in the middle of the device body, an electric push rod installed at the bottom of the test chamber, a test air nozzle installed at the top output end of the electric push rod, and a guide pipe fixedly connected between the test air nozzle and the air pump. Positioning components are vertically fixed around the bottom of the test chamber, and these positioning components fix the back of the display screen. An auxiliary sealing component is movably installed at the bottom of the test chamber to seal the interface on the back of the display screen.

[0007] As a further supplement to this solution, the air pump is a dual-purpose blow and suction air pump.

[0008] As a further supplement to this solution, the positioning components include a support tube and a positioning suction cup. The support tube is vertically fixed to the bottom of the test chamber, and the positioning suction cup is fixedly connected to the top of the support tube. The device body also has a separate vacuum pump built in, and the bottom of the support tube is fixedly connected to the vacuum pump through a second air guide tube.

[0009] As a further supplement to this solution, the auxiliary sealing components include a support plate, an arch frame, a lifting rod, a sealing structure, and a threaded rod; The bottom end of the support plate is detachably connected to the inner bottom end of the test chamber. The arch frame is fixed to the upper end of the support plate. The lifting rod slides vertically through the arch frame. The threaded rod is vertically rotated and installed on the upper end of the support plate. The upper half of the threaded rod is threaded onto the inner side of the arch frame. The sealing structure is installed on the top of the arch frame.

[0010] As a further supplement to this solution, the sealing structure includes a sealing cover and a sealing ring. The sealing cover is fixed to the top of the arch frame, and the sealing ring is fixed to the top periphery of the sealing cover.

[0011] As a further supplement to this solution, a rotating ring is fixedly sleeved on the lower half of the threaded rod.

[0012] As a further supplement to this solution, a positioning post is vertically fixed on the bottom surface of the support plate, and the bottom of the test chamber is densely covered with positioning holes that are compatible with the positioning post.

[0013] In summary, the technical effects and advantages of this utility model are as follows: 1. In this utility model, during testing, the back of the display screen faces down, and the front is not subjected to downward pressure. The positioning suction cup acts on the back of the display screen, which avoids changes in the sealing due to the fixing effect, thereby greatly reducing the test error.

[0014] 2. In this utility model, positive pressure test and negative pressure test are performed respectively. The positive pressure test is to use the air pump to blow air towards the data interface of the display screen through the test nozzle, and the negative pressure test is to use the air pump to draw air towards the data interface of the display screen through the test nozzle. The positive pressure test can effectively avoid the test error caused by the frame and polarizer being tightly attached due to negative pressure during the negative pressure test.

[0015] 3. In this utility model, by setting an auxiliary sealing component, when there may be multiple interfaces on the back of the display screen, the auxiliary sealing component can be used to seal the other interfaces before testing one interface. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure in this embodiment; Figure 2 This is a schematic diagram of the cross-sectional structure in this embodiment; Figure 3 This is a schematic diagram of the auxiliary sealing component in this embodiment; Figure 4 This is a schematic diagram showing the disassembled structure of the auxiliary sealing component in this embodiment.

[0018] In the diagram: 1. Device body; 101. Positioning socket; 2. Test nozzle; 3. Electric push rod; 4. Support tube; 5. Positioning suction cup; 6. Auxiliary sealing component; 61. Support plate; 62. Arch frame; 63. Lifting rod; 64. Sealing cover; 65. Sealing ring; 66. Threaded rod; 67. Rotating ring; 68. Positioning column; 7. Display screen. Detailed Implementation

[0019] 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.

[0020] Example: Reference Figure 1-4 The device shown includes a display screen sealing test device, comprising a device body 1 with a built-in air pump (not shown in the figure), and a test chamber in the middle of the device body 1, in which the display screen 7 to be tested is subjected to a sealing test.

[0021] The test chamber is equipped with a conventional electric push rod 3, such as the HLF01A model, installed at the bottom. A conventional test nozzle 2 is installed at the top output end of the electric push rod 3. The test nozzle 2 is compatible with the data interface of the conventional display screen 7. An air guide tube is fixedly connected between the test nozzle 2 and the air pump. Specifically, the air pump is a conventional blow-and-suction dual-purpose air pump, such as a conventional high-pressure vortex air pump. During testing, positive pressure testing and negative pressure testing can be performed separately. In the positive pressure test, the air pump blows air towards the data interface of the display screen 7 through the test nozzle 2. In the negative pressure test, the air pump draws air towards the data interface of the display screen 7 through the test nozzle 2. The positive pressure test can effectively avoid the test error caused by the frame and polarizer being tightly attached due to negative pressure during the negative pressure test.

[0022] The test chamber has vertically fixed positioning components around its inner bottom edge. These positioning components secure the back of the display screen 7. Specifically, the positioning components include a support tube 4 and a positioning suction cup 5. The support tube 4 is vertically fixed to the inner bottom edge of the test chamber, and the positioning suction cup 5 is fixedly connected to the top edge of the support tube 4. The device body 1 also has a built-in vacuum pump (not shown in the figure). The bottom edge of the support tube 4 is fixedly connected to the vacuum pump through a second air guide tube. The back of the display screen 7 is placed on the positioning suction cup 5, and the vacuum pump, through the support tube 4, firmly suctions the display screen 7 to the positioning suction cup 5, thus fixing the display screen 7 and facilitating stable sealing tests.

[0023] Because the back of the display screen 7 is facing down during testing, the front is not subjected to downward pressure, and the positioning suction cup 5 acts on the back of the display screen 7, thus avoiding changes in the sealing due to the fixing effect, thereby greatly reducing the test error.

[0024] In addition, considering that there may be multiple interfaces on the back of the display screen 7, when testing one interface, it is necessary to seal the other interfaces. An auxiliary sealing component 6 is movably installed at the bottom of the inner end of the test chamber. Of course, there are several auxiliary sealing components 6, but only one is shown in the figure. The auxiliary sealing component 6 seals the interfaces on the back of the display screen 7. Specifically, the auxiliary sealing component 6 includes a support plate 61, an arch frame 62, a lifting rod 63, a sealing structure, and a threaded rod 66. The bottom end of the support plate 61 is detachably connected to the bottom of the inner end of the test chamber. The arch frame 62 is fixed to the upper end of the support plate 61. The lifting rod 63 slides vertically through the arch frame 62. The threaded rod 66 is vertically rotated and installed at the upper end of the support plate 61, and the upper half of the threaded rod 66 is threaded onto the inner side of the arch frame 62. The sealing structure is installed at the top of the arch frame 62.

[0025] The sealing structure includes a sealing cover 64 and a sealing ring 65. The sealing cover 64 is fixed to the top of the arch frame 62, and the sealing ring 65 is fixed to the top periphery of the sealing cover 64. The sealing ring 65 can be a conventional rubber ring, which can enhance the sealing performance and better protect the display screen 7.

[0026] Based on the above structural arrangement, the auxiliary sealing component 6 is placed directly below the interface that needs to be sealed. The auxiliary sealing component 6 is horizontally fixed to the bottom of the test chamber. Then, the threaded rod 66 is rotated, which drives the lifting rod 63 to move upward, thereby covering the outer side of the interface with the sealing cover 64. The sealing ring 65 is used to seal and adhere to the back of the display screen 7, thus achieving a seal at the interface.

[0027] To facilitate the rotation of the threaded rod 66, a rotating ring 67 is fixedly sleeved on the lower half of the threaded rod 66.

[0028] The support plate 61 has a vertically fixed positioning post 68 on its bottom surface. The bottom of the test chamber is densely covered with positioning holes 101 that are compatible with the positioning post 68. The support plate 61 can be fixed in the horizontal direction by aligning the positioning post 68 with the corresponding positioning hole 101 and inserting it, thereby facilitating the stable rotation of the threaded rod 66.

[0029] The working principle of this utility model is as follows: the back of the display screen 7 is placed on the positioning suction cup 5, and the vacuum pump is used to make the positioning suction cup 5 firmly stick to the display screen 7 through the support tube 4, thereby fixing the display screen 7. Next, place the auxiliary sealing component 6 directly below the interface that needs to be sealed, and insert the positioning pin 68 into the corresponding positioning hole 101 to fix the support plate 61 in the horizontal direction. Then, rotate the threaded rod 66, which drives the lifting rod 63 to move upward, thereby covering the outside of the interface with the sealing cover 64, and sealing the back of the display screen 7 with the sealing ring 65 to achieve the sealing at the interface. During testing, positive pressure and negative pressure tests can be performed separately: Positive pressure test: Use the air pump to blow air towards the data interface of the display screen 7 through the test nozzle 2; Negative pressure test: The air pump is used to draw air through the test nozzle 2 toward the data interface of the display screen 7.

[0030] It should be noted that the specific models and specifications of electrical equipment such as air pumps, electric push rods 3, and vacuum pumps in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here. Moreover, their power supply and its principle (including the principle of sealing test by positive and negative pressure) are clear to those skilled in the art, and will not be described in detail here.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A display screen tightness testing device comprising a device body (1) with a built-in air pump, characterized in that, The device body (1) has a test chamber in the middle, an electric push rod (3) is installed at the bottom of the test chamber, a test nozzle (2) is installed at the top output end of the electric push rod (3), and a guide pipe is fixedly connected between the test nozzle (2) and the air pump. The test chamber is vertically fixed around its inner bottom edge with positioning components, which fix the back of the display screen (7). An auxiliary sealing component (6) is movably installed at the bottom of the test chamber, and the auxiliary sealing component (6) seals the interface on the back of the display screen (7).

2. The display screen leak test apparatus of claim 1, wherein: The air pump is a dual-purpose blow and suction air pump.

3. The display screen leak testing apparatus of claim 1, wherein: The positioning component includes a support tube (4) and a positioning suction cup (5). The support tube (4) is vertically fixed to the bottom of the test chamber. The positioning suction cup (5) is fixedly connected to the top of the support tube (4). The device body (1) also has a separate vacuum pump built in. The bottom of the support tube (4) is fixedly connected to the vacuum pump through the second air guide tube.

4. The display screen leak testing apparatus of claim 1, wherein: The auxiliary sealing component (6) includes a support plate (61), an arch frame (62), a lifting rod (63), a sealing structure, and a threaded rod (66). The bottom end of the support plate (61) is detachably connected to the inner bottom end of the test chamber. The arch frame (62) is fixed to the upper end of the support plate (61). The lifting rod (63) slides vertically through the arch frame (62). The threaded rod (66) is vertically rotated and installed on the upper end of the support plate (61). The upper half of the threaded rod (66) is threaded onto the inner side of the arch frame (62). The sealing structure is installed on the top of the arch frame (62).

5. The display screen leak testing apparatus of claim 4, wherein: The sealing structure includes a sealing cover (64) and a sealing ring (65). The sealing cover (64) is fixed to the top of the arch frame (62), and the sealing ring (65) is fixed to the periphery of the top of the sealing cover (64).

6. The display screen leak testing apparatus of claim 4, wherein: The lower half of the threaded rod (66) is fixedly sleeved with a rotating ring (67).

7. The display screen leak testing apparatus of claim 4, wherein: The bottom surface of the support plate (61) is vertically fixed with a positioning post (68), and the bottom end of the test cavity is densely covered with positioning holes (101) that are compatible with the positioning post (68).

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