Self-protection liquid crystal display mode test jig
This self-protected LCD display mode test fixture, which monitors the current through a pre-power-on device and engages a gear rack, solves the problems of circuit damage caused by load short circuits and screen damage caused by traditional disassembly, achieving safe and efficient testing and disassembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-04-07
AI Technical Summary
In existing LCD display testing methods, direct power-on testing is prone to causing circuit damage due to load short circuits, and traditional disassembly methods are prone to screen damage, increasing testing costs and operational risks.
A pre-power-on device is used to monitor the power circuit current, determine the load short circuit condition, and drive the push rod to move linearly through gear and rack meshing, smoothly pushing out the LCD screen and avoiding damage to the circuit and screen.
It effectively avoids circuit damage caused by short-circuit current, improves test safety, and protects the screen through a smooth disassembly method, reducing test costs and operational risks.
Smart Images
Figure CN224095982U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid crystal display mode technology, and in particular to a self-protecting liquid crystal display mode testing fixture. Background Technology
[0002] LCD screens are widely used in televisions, computer monitors, mobile phones, car dashboards, and many other fields. They display images or text by controlling the transmission of light.
[0003] Existing LCD display testing technologies often employ direct power-on testing. However, this method can generate significant short-circuit currents when a short circuit exists in the load of the module under test, potentially damaging the internal circuitry of the fixture and posing a safety hazard. Furthermore, traditional methods of disassembling LCD screens often involve prying open the disassembly ports, which can easily damage the screen due to uneven force, increasing testing costs and operational risks. Utility Model Content
[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a self-protected liquid crystal display mode test fixture. Through the pre-power-on device, the power circuit current can be monitored before the formal test to determine whether there is a short circuit in the load, thereby effectively avoiding damage to the fixture caused by excessive short circuit current and improving test safety. By rotating the shaft, the gear and rack mesh, causing the push rod to move linearly and push the top plate, thereby smoothly pushing the liquid crystal display screen out of the fixing slot, avoiding screen damage caused by prying in traditional disassembly methods. After disassembly, the spring force can make the push rod quickly return to its original position for easy use next time.
[0005] This utility model also provides a test fixture with a self-protected liquid crystal display mode, comprising: a fixture body, a pre-power-on and testing device and a fixing groove on the top of the fixture body, an adjustment groove inside the fixture body, and a disassembly port on the side of the fixing groove; a second cover plate on the top of the fixing groove; a connecting shaft rotatably connected to the side of the adjustment groove; a gear fixedly connected to the bottom of the connecting shaft; a rack meshing with the gear; a push rod fixedly connected to the back of the rack; a top plate fixedly connected to the top of the push rod; and a spring at the bottom of the push rod. Through this device, the pre-power-on monitoring current flows through the power circuit to determine if a load short circuit exists, effectively protecting the circuit from damage. Rotating the shaft causes the gear and rack to mesh, and the linear movement of the push rod pushes the top plate to detach the liquid crystal display from the fixing groove, greatly facilitating the disassembly operation.
[0006] According to the self-protecting liquid crystal display mode test fixture of this utility model, four legs are fixedly connected to the lower surface of the fixture body, and the legs are located at the four corners of the fixture body. Through the support of the legs, the fixture body remains stable, facilitating testing operations.
[0007] According to the self-protected liquid crystal display mode test fixture of this utility model, the pre-power-on connection is located between the test device and the fixed slot. The test device is connected to the pre-power-on connection, and the fixed slot is also connected to the pre-power-on connection. Through this device, the pre-power-on device can monitor the current in the power circuit before formal power-on, thereby determining whether there are any abnormalities such as short circuits, preventing circuit damage in advance, and ensuring current safety during the use of the fixture.
[0008] According to the self-protecting liquid crystal display mode testing fixture of this utility model, a first cover plate is provided on the pre-power-on device, and a first handle is provided on the first cover plate. Through the above device, the internal structure of the pre-power-on device can be protected by the first cover plate and its handle, preventing dust or foreign objects from entering.
[0009] According to the self-protecting liquid crystal display mode testing fixture of this utility model, the adjustment groove is located directly below the fixed groove, and the disassembly port is connected to the fixed groove. This device, through the adjustment groove and the fixed groove, facilitates the installation and operation of the disassembly auxiliary mechanism.
[0010] According to the self-protecting liquid crystal display mode test fixture of this utility model, a second handle is provided on the top of the second cover plate, and a rotating ring is provided outside the connecting shaft, with the rotating ring located outside the fixture body. Through the above device, the design of the second handle facilitates opening or closing the second cover plate, making operation and maintenance convenient; the rotating ring makes the rotation of the connecting shaft more convenient, allowing the user to control the operation of the disassembly auxiliary mechanism by rotating the rotating ring.
[0011] According to the self-protecting liquid crystal display mode testing fixture of this utility model, the gear is located inside the adjustment groove, and a movable groove is provided at the bottom of the fixed groove. The movable groove is fitted with a top plate, and the top plate is located inside the movable groove. Through the above device, the cooperation design of the gear and the movable groove allows the top plate to move smoothly within the fixed groove, thereby pushing the liquid crystal display screen out of the fixed groove and avoiding screen damage caused by uneven force during disassembly.
[0012] According to the self-protecting liquid crystal display mode testing fixture of this utility model, the lower surface of the spring and the push rod are connected to the bottom of the adjustment groove, and the top of the push rod penetrates through the adjustment groove. Through this device, the spring force allows the push rod to quickly return to its original position after disassembly, facilitating future use. Simultaneously, the spring connection design ensures the stability and reliability of the push rod's movement.
[0013] Beneficial effects
[0014] 1. Compared with the prior art, the test fixture for self-protection LCD display mode can monitor the power circuit current before formal testing through a pre-power-on device to determine whether there is a short circuit in the load, thereby effectively avoiding damage to the fixture caused by excessive short circuit current and improving test safety.
[0015] 2. Compared with the existing technology, this self-protection LCD display mode test fixture drives the gear and rack to mesh by rotating the shaft, so that the push rod moves linearly and pushes the top plate, thereby smoothly pushing the LCD screen out of the fixing groove. This avoids screen damage caused by prying in traditional disassembly methods. After disassembly, the spring force can make the push rod quickly return to its original position for easy use next time. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0017] Figure 1 This is the front view of the self-protection liquid crystal display mode test fixture of this utility model;
[0018] Figure 2 This utility model is a self-protecting liquid crystal display mode testing fixture. Figure 1 Internal structure diagram;
[0019] Figure 3 This utility model is a self-protecting liquid crystal display mode testing fixture. Figure 1 Internal sectional view;
[0020] Figure 4 This utility model is used in the self-protection liquid crystal display mode testing fixture. Figure 2 Enlarged view of point A in the middle;
[0021] Figure 5 This utility model is used in the self-protection liquid crystal display mode testing fixture. Figure 3 Enlarged view of section B in the middle.
[0022] Legend:
[0023] 1. Fixture body; 2. Support leg; 3. Pre-energized; 4. First cover plate; 5. Testing device; 6. Adjustment groove; 7. Top rod; 8. Top plate; 9. Fixing groove; 10. Moving groove; 11. Disassembly port; 12. Spring; 13. Rack; 14. Gear; 15. Coupling; 16. Rotary ring; 17. Second cover plate. Detailed Implementation
[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 This utility model provides a self-protecting liquid crystal display mode testing fixture, which includes: a fixture body 1, four legs 2 fixedly connected to the lower surface of the fixture body 1, the legs 2 being located at the four corners of the fixture body 1, a pre-power-on 3, a testing device 5 and a fixing groove 9 being provided on the top of the fixture body 1, the pre-power-on 3 being connected between the testing device 5 and the fixing groove 9, the testing device 5 being connected to the pre-power-on 3, the fixing groove 9 being connected to the pre-power-on 3, a first cover plate 4 being provided on the pre-power-on 3, a first handle (not shown in the figure) being provided on the first cover plate 4, an adjustment groove 6 being provided inside the fixture body 1, a disassembly port 11 being provided on the side of the fixing groove 9, the adjustment groove 6 being located directly below the fixing groove 9, and the disassembly port 11 being connected to the fixing groove 9;
[0026] Specifically, before testing, a preset voltage is applied to the LCD module under test through the pre-power-on device 3, and the current in the power supply circuit is monitored in real time. If the current exceeds the preset threshold, it is determined that there is a short circuit in the load, the power supply is cut off and an alarm is issued to avoid damage to the fixture body 1. If the current is normal, the formal test is carried out. The test device 5 mainly includes a current monitoring module, a pre-power-on power supply module and connecting wires. Its principle is to provide a low-voltage current through the pre-power-on module before formal power-on, and to detect the current change in the power supply circuit in real time through the current monitoring module. If the current exceeds the normal range, it indicates that there is a short circuit or other circuit abnormality, and the system will automatically cut off the power supply to prevent further damage to the equipment.
[0027] Reference Figure 3 , Figure 4 , Figure 5The top of the fixed groove 9 is provided with a second cover plate 17. The side of the adjusting groove 6 is rotatably connected with a connecting shaft 15. The top of the second cover plate 17 is provided with a second handle (not shown in the figure). The outside of the connecting shaft 15 is provided with a rotating ring 16, which is located outside the jig body 1. The bottom of the connecting shaft 15 is fixedly connected with a gear 14, which is located inside the adjusting groove 6. The bottom of the fixed groove 9 is provided with a moving groove 10, which is fitted with a top plate 8. The top plate 8 is located inside the moving groove 10. The gear 14 is meshed with a rack 13. The back of the rack 13 is fixedly connected with a top rod 7. The top of the top rod 7 is fixedly connected with the top plate 8. The bottom of the top rod 7 is provided with a spring 12. The spring 12 and the lower surface of the top rod 7 are connected to the bottom of the adjusting groove 6. The top of the top rod 7 passes through the adjusting groove 6.
[0028] Specifically, after the test is completed, when disassembling the LCD screen, the external rotating ring 16 drives the connecting shaft 15 and gear 14 to rotate. The gear 14 meshes with the rack 13 to make the push rod 7 move linearly, pushing the top plate 8 to smoothly push the LCD screen out of the fixing groove 9, avoiding screen damage caused by traditional disassembly methods. After disassembly, the elastic force of the spring 12 makes the push rod 7 quickly return to its original position for easy use next time.
[0029] Working principle: When in use, the jig body 1 is directly powered on. If there is a short circuit in the load, a large current will be generated, which will damage the jig. The current can be monitored by the pre-power-on 3 to determine whether there is a short circuit in the load, thereby protecting the circuit. At the same time, when disassembling the LCD screen, it is easy to damage the screen by prying it out through the disassembly port 11. At this time, rotating the shaft will drive the gear 14 to mesh with the rack 13, causing the push rod 7 to move linearly and push the top plate 8 to disengage the LCD screen from the fixing slot 9, thus facilitating disassembly. After completion, due to the elasticity of the spring 12, the push rod 7 will quickly return to its original position for easy use next time.
[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A self-protecting liquid crystal display mode testing fixture, characterized in that, include: The fixture body (1) is provided with a pre-power-on (3), a test device (5) and a fixing groove (9) on the top. The fixture body (1) is provided with an adjustment groove (6) inside. The fixing groove (9) is provided with a disassembly port (11) on the side. The top of the fixed groove (9) is provided with a second cover plate (17), the side of the adjusting groove (6) is rotatably connected with a connecting shaft (15), the bottom of the connecting shaft (15) is fixedly connected with a gear (14), the gear (14) is externally meshed with a rack (13), the back of the rack (13) is fixedly connected with a top rod (7), the top of the top rod (7) is fixedly connected with a top plate (8), and the bottom of the top rod (7) is provided with a spring (12).
2. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The lower surface of the fixture body (1) is fixedly connected with four legs (2), which are located at the four corners of the fixture body (1).
3. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The pre-power-on (3) is connected between the test device (5) and the fixing slot (9). The test device (5) is connected to the pre-power-on (3), and the fixing slot (9) is connected to the pre-power-on (3).
4. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The pre-power-on (3) is provided with a first cover plate (4), and the first cover plate (4) is provided with a first handle.
5. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The adjustment groove (6) is located directly below the fixing groove (9), and the disassembly port (11) is connected to the fixing groove (9).
6. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The second cover plate (17) is provided with a second handle on the top, and a rotating ring (16) is provided on the outside of the connecting shaft (15), and the rotating ring (16) is located outside the fixture body (1).
7. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The gear (14) is located inside the adjusting groove (6), and a movable groove (10) is provided at the bottom of the fixed groove (9). The movable groove (10) is fitted with the top plate (8), and the top plate (8) is located inside the movable groove (10).
8. The self-protecting liquid crystal display mode testing fixture according to claim 1, characterized in that, The lower surface of the spring (12) and the top rod (7) are connected to the bottom of the adjustment groove (6), and the top of the top rod (7) passes through the adjustment groove (6).