A sealing frame quality inspection device for liquid crystal display module production

Abstract

This invention belongs to the field of liquid crystal display module technology, and in particular, a quality inspection device for sealing frames used in the production of liquid crystal display modules. Addressing the problems mentioned in the background art regarding the easy displacement of the sealing frame position and the difficulty in inspecting cracks and burrs in the sealing frame, the present invention proposes the following solution: A base plate is included, and a quality inspection auxiliary mechanism is provided on the top of the base plate. The quality inspection auxiliary mechanism includes a first cylinder disposed on the top of the base plate, a connecting plate hinged to the piston rod of the first cylinder, and a first limiting plate hinged to the outer wall of one end of the connecting plate. This invention achieves positioning of the sealing frame body in the quality inspection auxiliary mechanism, preventing positional deviations. It also facilitates subsequent inspection of the sealing frame body's appearance using dial indicators and visual inspection instruments. The quality inspection mechanism can promptly detect cracks and burrs in the sealing frame body, removing defective products in a timely manner and ensuring the high efficiency of subsequent assembly of the liquid crystal display module.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display module technology, and in particular to a quality inspection device for a sealing frame used in the production of liquid crystal display modules. Background Technology

[0002] A liquid crystal display module refers to a general term for modular components assembled from liquid crystal display panels and related driving circuits, backlights, integrated circuits, etc. Its structure varies slightly depending on the downstream product application. With the development of touch technology, touchscreens are becoming increasingly common in liquid crystal displays, especially in small and medium-sized terminal products. Touch-integrated liquid crystal display modules also include the touchscreen component.

[0003] Simply put, an LCD module is a screen plus a backlight assembly. The display component of an LCD TV is the LCD module, which is equivalent to the picture tube in a CRT TV. Other parts include power supply circuits, signal processing circuits, and of course, the casing. The module mainly consists of the screen and the backlight assembly. These two parts are assembled together, but they operate independently (i.e., their circuits are unrelated). The principle of LCD display is that the backlight assembly emits uniform surface light, which is transmitted to our eyes through the LCD screen. The screen's function is to process this light pixel by pixel to display an image.

[0004] Liquid crystal display modules are very common in daily life. The sealing frame, as one of the structural components of a liquid crystal display module, plays a crucial role. However, the sealing frame has the following shortcomings during quality inspection:

[0005] First, the sealing frame must undergo quality inspection before assembling the LCD display module. The usual inspection method is a sealing test. However, the sealing frame is prone to displacement when the worker holds it, which makes subsequent quality inspection difficult.

[0006] Meanwhile, if cracks or burrs appear on the surface of the sealing frame, they are difficult to observe directly with the naked eye. However, if these problems cannot be identified, they will affect the subsequent assembly of the LCD module. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a quality inspection device for sealing frames used in the production of liquid crystal display modules. This device overcomes the deficiencies of existing technologies and effectively solves the problems of easy displacement of the sealing frame position and difficulty in inspecting cracks and burrs in the sealing frame.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A sealing frame quality inspection device for liquid crystal display module production includes a base plate, and a quality inspection auxiliary mechanism is provided on the top of the base plate. The quality inspection auxiliary mechanism includes a first cylinder provided on the top of the base plate, a connecting plate hinged to the piston rod of the first cylinder, a first limiting plate hinged to the outer wall of one end of the connecting plate, and a second limiting plate hinged to the outer wall of the other end of the connecting plate.

[0010] The top outer wall of the base plate is provided with a quality inspection mechanism, which includes a multi-axis robot fixed to the top outer wall of the base plate by bolts, a dial indicator connected to the outer wall of one end of the multi-axis robot, and a vision inspection instrument connected to the outer wall of one side of the dial indicator. A side plate is welded to the top outer wall of the base plate, and a second cylinder is fixed to the top inner wall of the side plate by bolts. The piston rod of the second cylinder is connected to a sealing inspection cover.

[0011] Through the above-described scheme, in the quality inspection auxiliary mechanism, after the sealing frame body is placed on the top plate, the extension and retraction of the first cylinder telescopic rod can control the tilt direction of the connecting plate, thereby achieving the positioning of the sealing frame body and preventing positional deviations. This also facilitates the subsequent inspection of the sealing frame body's appearance by dial indicators and vision inspection instruments. In the quality inspection mechanism, based on the air pump used to test the airtightness of the sealing frame body via the sealing inspection cover, a multi-axis robot is used to adjust the dial indicator and vision inspection instrument along the outer wall of the sealing frame body to inspect its appearance quality. This allows for the timely detection of cracks, burrs, and other problems in the sealing frame body, promptly removing defective products and ensuring the high efficiency of subsequent assembly of the LCD display module.

[0012] Preferably, an air inlet is connected to the center of the outer wall of the top of the sealing detection cover, and the air inlet can be connected to an air pump with a pressure gauge through an air pipe.

[0013] Preferably, a rotary cylinder is fixedly connected to the top outer wall of the base plate by bolts, and the output shaft of the rotary cylinder is connected to a partition plate, with the bottom outer wall of the first cylinder hinged to the top outer wall of the partition plate.

[0014] Preferably, a top plate is welded to the top outer wall of the partition, and a connecting plate is rotatably connected to the bottom outer wall of the top plate, while the first limiting plate and the second limiting plate are slidably connected to the inner wall of the top plate.

[0015] Preferably, a sealing frame body is placed on the outer wall of the top of the top plate, and a dial indicator is closely attached to the outer wall of the sealing frame body.

[0016] Preferably, the top outer wall of the sealing frame body is welded with symmetrically distributed positioning rods, and the positioning rods are slidably connected to the top inner wall of the side plate.

[0017] Preferably, a PLC control cabinet is placed on the top outer wall of the base plate, and a quality inspection display is provided on one side of the PLC control cabinet. The quality inspection display and the PLC control cabinet are connected by a signal line.

[0018] Preferably, the PLC control cabinet is connected to the first cylinder, the multi-axis robot, the dial indicator, the vision inspection instrument, the second cylinder, and the rotary cylinder via signal lines.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The sealing frame quality inspection device for liquid crystal display module production of the present invention, in the quality inspection auxiliary mechanism, after the sealing frame body is placed on the top plate, the direction of the connecting plate tilt can be controlled by the extension and retraction of the first cylinder telescopic rod, thereby realizing the positioning of the sealing frame body and preventing positional deviation. At the same time, it also provides convenience for subsequent micrometer and vision inspection instrument to inspect the appearance of the sealing frame body.

[0021] 2. The sealing frame quality inspection device for liquid crystal display module production of the present invention, in the quality inspection mechanism, based on the air tightness test of the sealing frame body by connecting the sealing test cover to the air pump, uses a multi-axis robot to adjust the dial indicator and vision inspection instrument along the outer wall of the sealing frame body to inspect its appearance quality. It can promptly detect cracks, burrs and other problems of the sealing frame body, and promptly remove unqualified products, ensuring the high efficiency of subsequent assembly of liquid crystal display modules. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a sealing frame quality inspection device for liquid crystal display module production proposed in this invention;

[0023] Figure 2 This is a side view of the overall structure of a sealing frame quality inspection device for liquid crystal display module production proposed in this invention;

[0024] Figure 3 This is a bottom view of the overall structure of a sealing frame quality inspection device for liquid crystal display module production proposed in this invention;

[0025] Figure 4 This is a schematic diagram of the quality inspection auxiliary mechanism of a sealing frame quality inspection device for liquid crystal display module production proposed in this invention.

[0026] In the diagram: 1. Base plate; 2. Quality inspection auxiliary mechanism; 21. First cylinder; 22. Connecting plate; 23. First limit plate; 24. Second limit plate; 3. Quality inspection mechanism; 31. Multi-axis robot; 32. Dial indicator; 33. Vision inspection instrument; 4. Side plate; 5. Second cylinder; 6. Sealing inspection cover; 7. Air inlet; 8. Rotary cylinder; 9. Partition plate; 10. Top plate; 11. Sealing frame body; 12. Positioning rod; 13. PLC control cabinet; 14. Quality inspection display. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example 1, refer to Figure 4 A quality inspection device for a sealing frame used in the production of liquid crystal display modules includes a base plate 1, and a quality inspection auxiliary mechanism 2 is provided on the top of the base plate 1. The quality inspection auxiliary mechanism 2 includes the following components:

[0029] Quality inspection auxiliary mechanism 2: The quality inspection auxiliary mechanism 2 includes a first cylinder 21 set on the top of the base plate 1, a connecting plate 22 hinged to the piston rod of the first cylinder 21, a first limiting plate 23 hinged to the outer wall of one end of the connecting plate 22, and a second limiting plate 24 hinged to the outer wall of the other end of the connecting plate 22.

[0030] In this embodiment, after the sealing frame body 11 is placed on the top plate 10, the extension and retraction of the telescopic rod of the first cylinder 21 can control the tilting direction of the connecting plate 22, thereby achieving the positioning of the sealing frame body 11 and preventing positional deviation. It also facilitates the subsequent inspection of the appearance of the sealing frame body by the dial indicator 32 and the vision inspection instrument 33.

[0031] Example 2, refer to Figure 1-2 A quality inspection device for a sealing frame used in the production of liquid crystal display modules, wherein a quality inspection mechanism 3 is provided on the top outer wall of the base plate 1, and the quality inspection mechanism 3 includes the following components:

[0032] Quality inspection agency 3: Quality inspection agency 3 includes a multi-axis robot 31 that is fixed to the top outer wall of the base plate 1 by bolts, a dial indicator 32 that is connected to the outer wall of one end of the multi-axis robot 31, and a vision inspection instrument 33 that is connected to the outer wall of one side of the dial indicator 32.

[0033] A side plate 4 is welded to the top outer wall of the base plate 1, and a second cylinder 5 is fixedly connected to the top inner wall of the side plate 4 by bolts. The piston rod of the second cylinder 5 is connected to a sealing detection cover 6.

[0034] In this embodiment, based on the air tightness of the sealing frame body 11 detected by the air pump connected to the sealing test cover 6, the multi-axis robot 31 is used to adjust the dial indicator 32 and the vision inspection instrument 33 along the outer wall of the sealing frame body 11 to detect its appearance quality. This can promptly identify problems such as cracks and burrs in the sealing frame body 11, remove unqualified products in time, and ensure the high efficiency of subsequent assembly of the liquid crystal display module.

[0035] Reference Figure 1 An air inlet 7 is connected to the center of the outer wall of the top of the sealing test cover 6, and the air inlet 7 can be connected to an air pump with an air pressure gauge through an air pipe.

[0036] Reference Figure 1 A rotary cylinder 8 is fixedly connected to the top outer wall of the base plate 1 by bolts, and the output shaft of the rotary cylinder 8 is connected to a partition 9. The bottom outer wall of the first cylinder 21 is hinged to the top outer wall of the partition 9.

[0037] Reference Figure 1 A top plate 10 is welded to the top outer wall of the partition 9, and a connecting plate 22 is rotatably connected to the bottom outer wall of the top plate 10. The first limiting plate 23 and the second limiting plate 24 are both slidably connected to the inner wall of the top plate 10.

[0038] Reference Figure 1 A sealing frame body 11 is placed on the outer wall of the top plate 10, and a dial indicator 32 is attached to the outer wall of the sealing frame body 11.

[0039] Reference Figure 1-2 The top outer wall of the sealing frame body 11 is welded with symmetrically distributed positioning rods 12, and the positioning rods 12 are slidably connected to the top inner wall of the side plate 4.

[0040] Reference Figure 2 A PLC control cabinet 13 is placed on the top outer wall of the base plate 1, and a quality inspection display 14 is set on one side of the PLC control cabinet 13. The quality inspection display 14 and the PLC control cabinet 13 are connected by a signal line.

[0041] Reference Figure 1-4 The PLC control cabinet 13 is connected to the first cylinder 21, the multi-axis robot 31, the dial indicator 32, the vision inspection instrument 33, the second cylinder 5, and the rotary cylinder 8 via signal lines.

[0042] Working principle: First, the sealing frame body 11 is placed on the top plate 10. The sealing frame body 11 can be positioned against the outer wall of the first limiting plate 23 or the second limiting plate 24. Then, the sealing detection cover 6 is moved downward by the second cylinder 5 and placed on the sealing frame body 11. The air pump with a pressure gauge is connected to the air inlet 7 at the center of the top outer wall of the sealing detection cover 6 through the air pipe. The air tightness of the sealing frame body 11 is judged by the amount of gas output by the air pump and the amount of leakage.

[0043] After the sealing test is passed, the sealing test cover 6 is reset. At this time, through the multi-axis linkage of the multi-axis robot 31, the dial indicator 32 and the vision inspection instrument 33 are adjusted to inspect the appearance quality along the outer wall of the sealing frame body 11. After the dial indicator 32 and the vision inspection instrument 33 inspect both sides of the sealing frame body 11, the partition 9 is rotated by the rotary cylinder 8. At this time, the telescopic rod of the first cylinder 21 performs telescopic operation to switch the height of the first limit plate 23 and the second limit plate 24. The multi-axis robot 3 controls the dial indicator 32 and the vision inspection instrument 33 to inspect the appearance quality along the other two sides of the sealing frame body 11, so as to promptly identify cracks, burrs and other problems of the sealing frame body 11 and remove unqualified products.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sealing frame quality inspection device for liquid crystal display module production, comprising a base plate (1), characterized in that, The bottom plate (1) is provided with a quality inspection auxiliary mechanism (2) on the top, and the quality inspection auxiliary mechanism (2) includes a first cylinder (21) provided on the top of the bottom plate (1), a connecting plate (22) hinged to the piston rod of the first cylinder (21), a first limiting plate (23) hinged to the outer wall of one end of the connecting plate (22), and a second limiting plate (24) hinged to the outer wall of the other end of the connecting plate (22). The top outer wall of the base plate (1) is provided with a quality inspection mechanism (3), and the quality inspection mechanism (3) includes a multi-axis robot (31) fixedly connected to the top outer wall of the base plate (1) by bolts, a dial indicator (32) connected to one end of the outer wall of the multi-axis robot (31), and a vision inspection instrument (33) connected to one side of the outer wall of the dial indicator (32). The top outer wall of the base plate (1) is welded with a side plate (4), and the top inner wall of the side plate (4) is fixedly connected with a second cylinder (5) by bolts. The piston rod of the second cylinder (5) is connected to a sealing inspection cover (6). The sealing test cover (6) has an air inlet (7) connected to the center of the outer wall at the top, and the air inlet (7) can be connected to an air pump with a pressure gauge through an air pipe. The top outer wall of the base plate (1) is fixedly connected to a rotary cylinder (8) by bolts, and the output shaft of the rotary cylinder (8) is connected to a partition (9). The bottom outer wall of the first cylinder (21) is hinged to the top outer wall of the partition (9). The top outer wall of the partition (9) is welded with a top plate (10), and the connecting plate (22) is rotatably connected to the bottom outer wall of the top plate (10). The first limiting plate (23) and the second limiting plate (24) are slidably connected to the inner wall of the top plate (10). A sealing frame body (11) is placed on the top outer wall of the top plate (10), and a dial indicator (32) is attached to the outer wall of the sealing frame body (11).

2. The sealing frame quality inspection device for liquid crystal display module production according to claim 1, characterized in that, The sealing frame body (11) has symmetrically distributed positioning rods (12) welded to the top outer wall, and the positioning rods (12) are slidably connected to the top inner wall of the side plate (4).

3. The sealing frame quality inspection device for liquid crystal display module production according to claim 1, characterized in that, A PLC control cabinet (13) is placed on the top outer wall of the base plate (1), and a quality inspection display (14) is provided on one side of the PLC control cabinet (13). The quality inspection display (14) and the PLC control cabinet (13) are connected by a signal line.

4. The sealing frame quality inspection device for liquid crystal display module production according to claim 3, characterized in that, The PLC control cabinet (13) is connected to the first cylinder (21), the multi-axis robot (31), the dial indicator (32), the vision inspection instrument (33), the second cylinder (5), and the rotary cylinder (8) via signal lines.

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