Pressing test device of liquid crystal display screen

Abstract

The utility model discloses a liquid crystal display screen pressing test device, which comprises an equipment bottom plate, a support plate and an equipment top plate, a sliding ring groove is arranged on the top surface of the equipment bottom plate, a sliding arc block is slidably connected in the sliding ring groove, a hydraulic base plate is fixedly connected to the top end of the sliding arc block, and a hydraulic telescopic rod is arranged on one side of the hydraulic base plate. The tail end of the hydraulic telescopic rod is fixedly connected with a screen clamping angle block, the top face in the screen clamping angle block is fixedly connected with a rubber pressing block, a rotating circular groove is formed in the equipment top plate in a penetrating mode, a rotating circular plate is embedded in the rotating circular groove, the top end and the bottom end of the rotating circular plate are symmetrically and fixedly sleeved with anti-falling edge rings, and a horizontal groove is formed in the center line of the rotating circular plate in a penetrating mode. According to the utility model, the pressing rotation angle can be adjusted by 360 degrees through cooperation of the rotating circular plate and the positioning clamping rod, fine adjustment of the horizontal position of the pneumatic pump can be realized through the threaded rod and the hexagonal nut, and the function of multi-point pressing test can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to press testing equipment technical field, concretely is a kind of press testing device of liquid crystal display. BACKGROUND

[0002] The press testing device of liquid crystal display is a special equipment for the performance detection of liquid crystal display, which applies controllable pressing force, impact force or multi-point pressure to the display screen through mechanical, hydraulic and pneumatic driving modes, simulates the pressing and collision scenarios that may be encountered in daily use, and combines pressure sensors and visual detection technologies to monitor and record the physical changes and display performance parameters of the display screen during the pressing process in real time, so as to evaluate the reliability of quality indicators such as structural strength, touch sensitivity and display stability.

[0003] The existing Chinese patent document CN216669220U discloses a press testing device for liquid crystal display, which includes a vertical pressure mechanism, a horizontal pressure mechanism and a limiting mechanism. The vertical pressure mechanism is arranged above the liquid crystal display and can apply pressing force to the liquid crystal display. The horizontal pressure mechanism is provided with two horizontal pressure mechanisms, which are respectively located on the opposite sides of the vertical pressure mechanism and can abut against the opposite sides of the vertical pressure mechanism to generate friction force between the horizontal pressure mechanism and the vertical pressure mechanism. The horizontal pressure mechanism can abut against the limiting mechanism to limit the normal pressure of the horizontal pressure mechanism on the vertical pressure mechanism. The press testing device for liquid crystal display can accurately control the pressing force on the liquid crystal display, which not only reduces the damage rate of the liquid crystal display, but also improves the accuracy of the press detection results. However, the press testing device for liquid crystal display still has the following problems: the pressing position is fixed, and the liquid crystal display body needs to be frequently moved to change the pressing position, which is easy to fall and damage. Moreover, the pressure mechanism at the fixed position can only realize single-point pressing, and it is difficult to simulate the multi-point pressure that the display screen receives in actual use. SUMMARY

[0004] The utility model aims at solving the problem of the press testing device for liquid crystal display, i.e. the pressing position is fixed, the liquid crystal display body needs to be frequently moved to change the pressing position, which is easy to fall and damage, and the pressure mechanism at the fixed position can only realize single-point pressing, which is difficult to simulate the multi-point pressure that the display screen receives in actual use, and provides a press testing device for liquid crystal display.

[0005] To achieve the above object, the utility model provides following technical scheme: a kind of pressing test device of liquid crystal display, it include: equipment bottom plate, support plate and equipment top plate, the equipment bottom plate top surface is equipped with sliding ring groove, the sliding ring groove inside is slidably connected with sliding arc block, the sliding arc block top end is fixedly connected with hydraulic base plate, one side of the hydraulic base plate is equipped with hydraulic telescopic rod, the hydraulic telescopic rod end is fixedly connected with screen clamping angle block, the screen clamping angle block inside top surface is fixedly connected with rubber pressing block, the equipment top plate is equipped with rotating circular groove, the rotating circular groove is embedded with rotating circular plate inside, the rotating circular plate top end and bottom end are symmetrically fixedly sleeved with anti-off edge ring, the rotating circular plate center line is equipped with horizontal groove, the horizontal groove inside is slidably connected with air pump base, the air pump base bottom end is fixedly connected with air pressure pump body, the air pressure pump body output end is provided with airflow duct, the airflow duct is provided with airflow passage inside, the airflow passage bottom end is fixedly connected with limit ring, the limit ring inside is movably provided with guide rod, the guide rod top end is fixedly connected with piston block, the guide rod outside is sleeved with reset spring, the guide rod bottom end is fixedly connected with pressing head.

[0006] As the further scheme of the utility model: the sliding ring groove inside is slidably connected with four groups of sliding arc blocks, the same number of specifications of hydraulic base plate, hydraulic telescopic rod, screen clamping angle block and rubber pressing block structure are all arranged at the top end of four groups of sliding arc blocks, and the freely telescopic hydraulic telescopic rod cooperates with screen clamping angle block and its internal structure to carry out arbitrary four-way clamping and pressing operation on liquid crystal display, so as to adapt to the fixing needs of liquid crystal display of different shapes and specifications.

[0007] As the further scheme of the utility model: the top end of four groups of sliding arc blocks is provided with extension piece structure on one side, and positioning clamping piece is movably inserted in the inside, and the equipment bottom plate top surface is equipped with several groups of adjusting clamping grooves around the outer circle of sliding ring groove, the end of positioning clamping piece is adapted to the specification of adjusting clamping groove, so as to conveniently fix the specific position of the group of sliding arc blocks in the sliding ring groove.

[0008] As the further scheme of the utility model: the rotating circular plate is embedded and clamped in the rotating circular groove inside by two groups of anti-off edge rings, and the structure of circular groove and circular plate makes the rotating circular plate also rotate at any angle inside, one end of the group of anti-off edge rings sleeved at the top end of rotating circular plate is movably provided with positioning clamping rod, the top surface of equipment top plate is equipped with several groups of adjusting rod grooves around the outer circle of rotating circular groove, the end of positioning clamping rod is adapted to the specification of adjusting rod groove, so as to conveniently fix the rotating angle.

[0009] As a further scheme of the utility model: the horizontal groove inside both sides are fixedly connected with stand plates, two groups of stand plates are fixedly arranged with threaded rods between them, the air pump base top is fixedly connected with a connecting plate, the connecting plate is penetrated with a through slot, the through slot is connected with a hexagon nut, the hexagon nut is provided with a recess in the middle, so that it can be clamped into the through slot without falling out and can rotate freely, the hexagon nut is screwed on the outside of the threaded rod.

[0010] As a further scheme of the utility model: the air pressure pump body communicates with the airflow pipeline to generate high-pressure gas, the inner wall of the airflow channel is smooth to reduce airflow loss, the guide rod generates impact force under the action of high-pressure airflow through the piston block to simulate pressing, the return spring is sleeved on the outside of the guide rod, and the top end is fixedly connected to the bottom end of the piston block, and the bottom end is fixedly connected to the top end of the limiting ring, so that the guide rod automatically returns to the inside of the airflow channel without high-pressure airflow injection, so as to avoid continuous pressing damage to the screen, and the pressing head is integrated with a pressure sensor module to realize real-time feedback of pressing force.

[0011] As a further scheme of the utility model: the device top plate is hinged to one side top end of the supporting plate, two groups of supporting rods are fixedly connected to one end of the bottom surface of the device top plate in a symmetrical manner, a control screen is installed at one end of the device bottom plate, and the control screen and the air pressure pump body are electrically connected.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1、The utility model discloses a combination design of sliding ring groove, rotating circular plate and threaded rod, realizing three-dimensional flexible adjustment of "clamping position-pressing angle-pressing point", four groups of hydraulic clamping structures can move along the ring groove and be accurately positioned, adapting to display screens of different sizes and shapes, the rotating circular plate cooperates with the positioning clamping rod to adjust the pressing rotation angle by 360 degrees, the threaded rod and the hexagon nut can realize fine adjustment of the horizontal position of the air pressure pump, this multi-dimensional adjustable structure changes the limitations of fixed angle and single position of traditional test devices, can simulate the pressure scene of display screens at any point in actual use, and significantly improves the comprehensiveness and precision of test.

[0014] 2、The utility model integrates the pressure sensor module in the pressing head, realizes real-time monitoring and feedback of pressing force, realizes visualization of pressure data and accurate parameter control in cooperation with the control screen, discards the extensive mode of judging pressure relying on experience, and simultaneously, the air pressure drive cooperates with the return spring to form an automatic circulation mechanism of "pressing-returning", and the pressing head is quickly withdrawn after completing test, so that irreversible damage of the display screen caused by continuous pressing is avoided. DRAWINGS

[0015] Figure 1It is the whole structure schematic view of the pressing test device of the liquid crystal display screen.

[0016] Figure 2 It is the structure schematic view of the sliding ring groove in the pressing test device of the liquid crystal display screen.

[0017] Figure 3 It is the structure schematic view of the rotating round plate in the pressing test device of the liquid crystal display screen.

[0018] Figure 4 It is the structure schematic view of the air pressure pump body in the pressing test device of the liquid crystal display screen.

[0019] Figure 5 It is the structure schematic view of the guide connecting rod in the pressing test device of the liquid crystal display screen.

[0020] Figure 6 It is the structure schematic view of the supporting rod in the pressing test device of the liquid crystal display screen.

[0021] In the figure: 1, equipment bottom plate; 2, support plate; 3, equipment top plate; 4, sliding ring groove; 5, sliding arc block; 6, hydraulic base plate; 7, hydraulic telescopic rod; 8, screen clamping corner block; 9, rubber pressing block; 10, positioning clamping piece; 11, adjusting clamping groove; 12, rotating round groove; 13, rotating round plate; 14, anti-off edge ring; 15, positioning clamping rod; 16, adjusting rod groove; 17, horizontal groove; 18, vertical plate; 19, threaded rod; 20, air pump base; 21, connecting plate; 22, through groove; 23, hexagonal nut; 24, air pressure pump body; 25, air flow pipeline; 26, air flow passage; 27, limiting ring; 28, guide connecting rod; 29, piston block; 30, return spring; 31, pressing head; 32, supporting rod; 33, control screen. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, it is necessary to explain that, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The embodiments will be described below according to the overall structure of the utility model.

[0024] Referring to Figures 1 to 6 In the utility model embodiment, a kind of pressing test device of liquid crystal display screen, it include: equipment bottom plate 1, support plate 2 and equipment top plate 3, equipment bottom plate 1 top surface is equipped with sliding ring groove 4, sliding ring groove 4 inside slidingly connected with sliding arc block 5, sliding arc block 5 top end is fixedly connected with hydraulic base plate 6, one side of hydraulic base plate 6 is equipped with hydraulic telescopic rod 7, hydraulic telescopic rod 7 end is fixedly connected with screen clamping angle block 8, screen clamping angle block 8 inside top surface is fixedly connected with rubber pressing block 9, equipment top plate 3 is equipped with rotating circular groove 12, rotating circular groove 12 is embedded with rotating circular plate 13, rotating circular plate 13 top end and bottom end are symmetrically fixedly provided with anti-off edge ring 14, horizontal slot 17 is equipped on the center line of rotating circular plate 13, air pump base 20 is slidably connected in horizontal slot 17, air pump base 20 bottom end is fixedly connected with air pressure pump body 24, air pressure pump body 24 output end is provided with airflow duct 25, airflow duct 25 is provided with airflow passage 26, airflow passage 26 bottom end is fixedly connected with limit ring 27, limit ring 27 is movably provided with lead-in rod 28, lead-in rod 28 top end is fixedly connected with piston block 29, lead-in rod 28 outer side is provided with reset spring 30, lead-in rod 28 bottom end is fixedly connected with pressing head 31.

[0025] Referring to Figures 1 to 6The four groups of sliding arc blocks 5 are slidably connected inside the sliding ring groove 4, and the top ends of the four groups of sliding arc blocks 5 are provided with the same number of specifications of hydraulic base plates 6, hydraulic telescopic rods 7, screen clamping corner blocks 8 and rubber pressing blocks 9 structures. The freely telescopic hydraulic telescopic rods 7 cooperate with the screen clamping corner blocks 8 and the internal structures thereof to perform arbitrary four-way clamping and pressing operations on the liquid crystal display screen, and adapt to the fixing requirements of liquid crystal display screens of different shapes and specifications.

[0026] By adopting the above scheme: the four groups of sliding arc blocks 5 are evenly distributed in the sliding ring groove 4 and can slide along the circumferential direction of the ring groove to drive the top-end hydraulic base plates 6, hydraulic telescopic rods 7 and other components to move. The hydraulic telescopic rods 7 are driven by hydraulic pressure and can be flexibly adjusted in length according to the size and shape of the display screen to accurately clamp the display screen from four directions. For example, for a square display screen, the four groups of hydraulic telescopic rods 7 can be adjusted to make the screen clamping corner blocks 8 adhere to the four corners of the display screen. For an irregularly shaped display screen, the four groups of clamping structures can also be adjusted respectively to achieve stable fixing. This four-way clamping design greatly improves the compatibility of the device for different specifications of display screens compared to the clamping method in a single direction or fixed position, effectively avoids the deviation of test results caused by unstable fixing of the display screen during testing, and improves the universality and reliability of the test.

[0027] With reference to Figures 1 to 6 The top end of each of the four groups of sliding arc blocks 5 is provided with an extension piece structure, and a positioning clamping piece 10 is movably inserted in each extension piece structure. The top surface of the equipment base plate 1 is provided with a plurality of groups of adjustment clamping grooves 11 around the outer circle of the sliding ring groove 4. The end of the positioning clamping piece 10 is adapted to the specification of the adjustment clamping groove 11, so as to conveniently fix the specific position of the sliding arc block 5 in the sliding ring groove 4.

[0028] By adopting the above scheme: the extension piece structure extends from the top end of the sliding arc block 5 to provide a mounting position for the positioning clamping piece 10. The positioning clamping piece 10 can move in the extension piece to realize the action of insertion and extraction. The adjustment clamping grooves 11 provided on the equipment base plate 1 around the sliding ring groove 4 are evenly distributed at a certain interval to form multiple selectable positioning points. When the sliding arc block 5 moves to the appropriate position, the positioning clamping piece 10 is inserted into the corresponding adjustment clamping groove 11 to firmly fix the sliding arc block 5 in the sliding ring groove 4. This design can quickly lock the position of the clamping structure to prevent the sliding arc block 5 from moving due to vibration and other factors during testing, thereby affecting the fixing effect of the display screen and the accuracy of the test. At the same time, the multiple adjustment clamping grooves 11 provide rich position adjustment options, which can flexibly select the best clamping position according to the actual size of the display screen and the test requirements, thereby enhancing the flexibility and stability of the device in use.

[0029] With reference to Figures 1 to 6, the rotating circular plate 13 is embedded and clamped in the rotating circular groove 12 through two groups of anti-edge falling rings 14, and the structure of the circular groove and the circular plate enables the rotating circular plate 13 to also rotate at any angle inside it, one end of the group of anti-edge falling rings 14 through which the rotating circular plate 13 is sleeved is movably provided with a positioning clamping rod 15, and a plurality of groups of adjusting rod grooves 16 are arranged in a ring column on the top surface of the equipment top plate 3 around the outer circle of the rotating circular groove 12, and the tail end of the positioning clamping rod 15 is matched with the specification of the adjusting rod groove 16, so as to conveniently fix the rotation angle.

[0030] By adopting the above scheme: the rotating circular plate 13 is wrapped by two groups of anti-edge falling rings 14 and embedded in the rotating circular groove 12, the anti-edge falling ring 14 plays a role of preventing the rotating circular plate 13 from falling off the rotating circular groove 12, and meanwhile does not affect the rotation of the rotating circular plate 13 in the groove, the rotating circular plate 13 can be freely rotated by 360 degrees in the rotating circular groove 12 according to the test requirement, so as to adjust the position of the pressing head 31 relative to the liquid crystal display screen, the positioning clamping rod 15 can be movably inserted at one end of the anti-edge falling ring 14, and the adjusting rod groove 16 provided on the equipment top plate 3 around the rotating circular groove 12 is distributed at a certain interval, like the adjusting clamping groove 11, when the rotating circular plate 13 is rotated to the required angle, the positioning clamping rod 15 is inserted into the corresponding adjusting rod groove 16, and the angle of the rotating circular plate 13 can be fixed, which enables the pressing head 31 to press the display screen from different positions, simulates the situation that the display screen may be subjected to any point pressure in actual use, compared with the fixed-angle test mode, can more comprehensively detect the pressure resistance of the display screen, and improves the reliability and effectiveness of the test result.

[0031] Referring to Figures 1 to 6 , the horizontal groove 17 is symmetrically and fixedly connected with a vertical plate 18 on both sides, a threaded rod 19 is fixedly arranged between the two groups of vertical plates 18, a connecting plate 21 is fixedly connected to the top end of the air pump base 20, a through groove 22 is penetratingly arranged in the connecting plate 21, a hexagonal nut 23 is clamped in the through groove 22, the hexagonal nut 23 is arranged in a structure that a recess is arranged in the middle section, so that the hexagonal nut 23 can be clamped in the through groove 22 without falling out and can be freely rotated, and the hexagonal nut 23 is sleeved and screwed on the outside of the threaded rod 19.

[0032] With the above scheme: the vertical plate 18 is vertically fixed inside the horizontal groove 17 on both sides, which plays a supporting and fixing role for the threaded rod 19, the threaded rod 19 spans between the two groups of vertical plates 18, the air pump base 20 is connected with the threaded rod 19 through the connecting plate 21, the through slot 22 provides installation space for the hexagonal nut 23, and the groove in the middle of the hexagonal nut 23 is matched with the through slot 22, so that the hexagonal nut 23 can rotate in the through slot 22 and will not be separated from the connecting plate 21. When it is necessary to adjust the position of the air pressure pump body 24 in the horizontal groove 17, the hexagonal nut 23 is rotated. Since the hexagonal nut 23 is in threaded connection with the threaded rod 19, the air pump base 20 will be moved along the threaded rod 19 in the horizontal groove 17. This design cooperates with the flexible rotation of the rotating circular plate 13 to realize that the air pressure pump body 24 can be finely adjusted at each position. The position of the pressing head 31 can be accurately adjusted according to the test area of the display screen, so as to ensure that the pressing test can cover each key part of the display screen and improve the comprehensiveness and pertinence of the test.

[0033] With reference to Figures 1 to 6 , the air pressure pump body 24 communicates with the airflow pipeline 25 to generate high-pressure gas jet, the inner wall of the airflow channel 26 is smooth to reduce airflow loss, the guide rod 28 generates impact force under the action of high-pressure airflow through the piston block 29 to simulate pressing, the reset spring 30 is sleeved outside the guide rod 28, and the top end is fixed to the bottom end of the piston block 29, and the bottom end is fixed to the top end of the limiting ring 27, so that the guide rod 28 automatically resets to the inside of the airflow channel 26 without high-pressure airflow injection, so as to avoid continuous pressure application to damage the screen. The pressing head 31 is internally integrated with a pressure sensor module to realize real-time feedback of pressing force.

[0034] With the above scheme: the air pressure pump body 24 as the power core converts electrical energy into gas pressure energy, the generated high-pressure gas is delivered to the airflow channel 26 through the airflow pipeline 25, and the smooth inner wall of the airflow channel 26 effectively reduces the resistance of the gas flow and reduces energy loss, so as to ensure that the high-pressure gas can act on the piston block 29 with stable pressure. When the high-pressure gas enters the airflow channel 26, it pushes the piston block 29, and then drives the guide rod 28 and the pressing head 31 to move downward to generate a pressing impact force on the liquid crystal display screen, simulate the pressure condition of the display screen in actual use, and the reset spring 30 is compressed in the pressing process. When the air pressure pump stops supplying gas and the high-pressure airflow disappears, the reset spring 30 pushes the guide rod 28 upward by virtue of its own elastic restoring force, so that it returns to the initial position, preventing the display screen from being irreversibly damaged due to long-term pressure. The pressure sensor module integrated in the pressing head 31 can sense and measure the pressure in the pressing process in real time, and transmit the data to the control system, so as to facilitate the operator to accurately master the pressing force and realize accurate control of the test process. Compared with the traditional way of judging pressure by experience, the accuracy and repeatability of the test result are greatly improved.

[0035] With reference toFigures 1 to 6 The device top plate 3 is hinged to one side top end of the support plate 2, and two groups of support rods 32 are symmetrically fixed to one end of the bottom surface of the device top plate 3; one end of the device bottom plate 1 is provided with a control screen 33, and the control screen 33 is electrically connected with the air pressure pump body 24.

[0036] The device top plate 3 is hinged to the support plate 2, so that the device top plate 3 can rotate around the hinge point, facilitating the placement or removal of the liquid crystal display screen before testing, and improving the convenience of operation; the support rods 32 are symmetrically installed at one end of the bottom surface of the device top plate 3, and when the device top plate 3 is rotated to the horizontal testing position, the support rods 32 support the device top plate 3, ensuring the stability thereof during testing, preventing the shaking of the top plate from affecting the test results; the control screen 33 integrates display and control functions, and the operator can set the working parameters of the air pressure pump body 24, such as the output air pressure size and the pressing frequency, through the control screen 33, and the control screen 33 also displays the related data during the pressing test in real time, such as the pressing force and the test time.

[0037] The working principle of the utility model is as follows: when in use, the liquid crystal display screen is placed on the top surface of the device bottom plate 1, and the hydraulic base plate 6, the hydraulic telescopic rod 7, the screen clamping corner block 8 and the rubber pressing block 9 are moved by the four sliding arc blocks 5 located in the sliding ring grooves 4; according to the shape and size of the display screen, the hydraulic telescopic rod 7 is adjusted in length to make the screen clamping corner block 8 stably clamp the display screen from four directions, and the rubber pressing block 9 elastically presses the four corners of the display screen; then, the positioning clamping piece 10 is inserted into the extension piece and the adjusting clamping groove 11 to fix the position of the sliding arc block 5, so that the display screen will not be displaced during the test;

[0038] If it is necessary to change the pressing position, the rotating circular plate 13 is first rotated, the air pressure pump body 24, the guide connecting rod 28 and the pressing head 31 are adjusted in rotation angle by the free rotation characteristics of the rotating circular plate 13 in the rotating circular groove 12, and at the same time, the hexagonal nut 23 is rotated to move on the threaded rod 19, the air pump base 20 is slid in the horizontal groove 17, the horizontal position of the air pressure pump body 24 is finely adjusted, the angle of the rotating circular plate 13 is fixed by inserting the positioning clamping rod 15 into the anti-off edge ring 14 and the adjusting rod groove 16 after adjustment, and the pressing head 31 is aligned with the test area of the display screen;

[0039] The operator sets the working parameters of the air pressure pump body 24, such as the output air pressure size, the pressing frequency, etc. through the control screen 33. After the air pressure pump body 24 is started, the high-pressure gas generated enters the air flow channel 26 through the air flow pipeline 25, pushes the piston block 29, and makes the guide rod 28 and the pressing head 31 move downward to generate a pressing impact force on the liquid crystal display screen. During the pressing process, the pressure sensor module in the pressing head 31 monitors the pressing degree in real time and feeds back the data to the control screen 33. When the air pressure pump stops supplying air, the reset spring 30 pushes the guide rod 28 and the pressing head 31 to reset, preventing the display screen from being damaged due to continuous pressure.

[0040] The device top plate 3 is connected to the support plate 2 in a hinged manner. Before testing, the top plate can be rotated to facilitate the placement or removal of the display screen. During testing, the support rod 32 supports the device top plate 3 to ensure the stability of the top plate during testing. The control screen 33 can not only set the test parameters, but also display the pressing degree, test time and other data in real time, which facilitates the operator to monitor the test process and realizes the precise control of the entire pressing test process.

[0041] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A pressure testing device for a liquid crystal display screen, comprising: The equipment base plate (1), support plate (2), and equipment top plate (3) are characterized in that a sliding annular groove (4) is provided on the top surface of the equipment base plate (1), a sliding arc block (5) is slidably connected inside the sliding annular groove (4), a hydraulic base plate (6) is fixedly connected to the top of the sliding arc block (5), a hydraulic telescopic rod (7) is installed on one side of the hydraulic base plate (6), a screen clamping corner block (8) is fixedly connected to the end of the hydraulic telescopic rod (7), a rubber pressure block (9) is fixedly connected to the top surface inside the screen clamping corner block (8), a rotating circular groove (12) is provided through the equipment top plate (3), a rotating circular plate (13) is embedded inside the rotating circular groove (12), and anti-detachment edge rings (14) are symmetrically fixedly fitted at the top and bottom of the rotating circular plate (13). A horizontal groove (17) is provided through the center line of the rotating circular plate (13). A pump base (20) is slidably engaged inside the horizontal groove (17). A pressure pump body (24) is fixedly connected to the bottom end of the pump base (20). An airflow pipe (25) is provided at the output end of the pressure pump body (24). An airflow channel (26) is provided inside the airflow pipe (25). A limit ring (27) is fixedly connected to the bottom end of the airflow channel (26). A guide rod (28) is movably inserted inside the limit ring (27). A piston block (29) is fixedly connected to the top end of the guide rod (28). A reset spring (30) is sleeved on the outside of the guide rod (28). A pressing head (31) is fixedly connected to the bottom end of the guide rod (28).

2. The pressure testing device for a liquid crystal display screen according to claim 1, characterized in that, The sliding ring groove (4) is internally connected to four sets of sliding arc blocks (5). The top of each of the four sets of sliding arc blocks (5) is provided with the same number and specifications of hydraulic base plate (6), hydraulic telescopic rod (7), screen clamping corner block (8) and rubber pressure block (9) structure. The freely extendable hydraulic telescopic rod (7) cooperates with the screen clamping corner block (8) and its internal structure to perform arbitrary four-way clamping and pressing operation on the liquid crystal display screen, adapting to the fixing requirements of liquid crystal display screens of different shapes and specifications.

3. The pressure testing device for a liquid crystal display screen according to claim 1, characterized in that, Each of the four sets of sliding arc blocks (5) has an extension plate structure on one side of its top end, and each of them has a positioning card (10) inserted inside. The top surface of the equipment base plate (1) has several sets of adjustment slots (11) arranged in a ring around the outer ring of the sliding ring groove (4). The end of the positioning card (10) is adapted to the size of the adjustment slot (11) to conveniently fix the specific position of the set of sliding arc blocks (5) in the sliding ring groove (4).

4. The pressure testing device for a liquid crystal display screen according to claim 1, characterized in that, The rotating circular plate (13) is embedded and locked inside the rotating circular groove (12) by two sets of anti-detachment edge rings (14). The structure of the circular groove and the circular plate allows the rotating circular plate (13) to rotate at any angle inside. One end of the anti-detachment edge ring (14) sleeved on the top of the rotating circular plate (13) is movably connected to a positioning rod (15). The top surface of the equipment top plate (3) is provided with several sets of adjusting rod grooves (16) arranged in a ring around the outer ring of the rotating circular groove (12). The end of the positioning rod (15) is adapted to the specifications of the adjusting rod groove (16) to facilitate fixing the rotation angle.

5. The pressure testing device for a liquid crystal display screen according to claim 1, characterized in that, The horizontal groove (17) has vertical plates (18) symmetrically fixed on both sides inside. A threaded rod (19) is fixed between the two sets of vertical plates (18). A connecting plate (21) is fixed to the top of the air pump base (20). The connecting plate (21) has a through groove (22) through it. A hexagonal nut (23) is snapped into the through groove (22). The hexagonal nut (23) is designed with a groove in the middle section so that it can be snapped into the through groove (22) without coming out and can rotate freely. The hexagonal nut (23) is screwed onto the outside of the threaded rod (19).

6. The pressure testing device for a liquid crystal display screen according to claim 1, characterized in that, The air pump body (24) is connected to the airflow pipe (25) to generate high-pressure gas. The inner wall of the airflow channel (26) is smooth to reduce airflow loss. The guide rod (28) generates impact force to simulate pressing under the action of high-pressure airflow through the piston block (29). The reset spring (30) is sleeved on the outside of the guide rod (28) and its top end is fixed to the bottom end of the piston block (29), and its bottom end is fixed to the top end of the limiting ring (27), so that the guide rod (28) automatically resets back to the inside of the airflow channel (26) when there is no high-pressure airflow jet, so as to avoid continuous pressure damage to the screen. The pressing head (31) has an integrated pressure sensor module to provide real-time feedback on the pressing force.

7. The pressure testing device for a liquid crystal display screen according to claim 1, characterized in that, The top plate (3) of the equipment is hinged to the top of one side of the support plate (2). Two sets of support rods (32) are symmetrically fixed to one end of the bottom surface of the top plate (3). A control panel (33) is installed at one end of the bottom plate (1) of the equipment. The control panel (33) is electrically connected to the air pressure pump body (24).

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