A calibration fixture for a liquid crystal display
Patent Information
- Application Number
- CN202210078139.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-01-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2042-01-24
AI Technical Summary
The existing LCD display fixing device has problems such as weak fixation and inaccurate correction, which causes the LCD display to easily loosen during the assembly process, affecting the accuracy of the assembly position.
An LCD display calibration fixture including a base, a support frame, a rotating plate, a fixed frame, a closing mechanism, a limiting mechanism and a clamping mechanism is designed. Through the distance sensor, electric push rod, limiting plate, rack, deceleration Motors and other components enable precise clamping and calibration of LCD screens.
It achieves high-accuracy fixing and calibration of the LCD screen, ensuring positional stability during assembly, and cleans dust with a hair dryer, improving overall assembly efficiency and quality.
Smart Images
Figure CN114434369B8_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a fixing device, and more particularly to a calibration fixing device for a liquid crystal display screen. Background Technology
[0002] As society continues to develop and people's living standards improve, their demands for quality of life also increase. Consequently, material needs rise, and LCD TVs have become a necessity for every household. Currently, most LCD TVs on the market have large LCD screens. LCD TVs are generally placed in the living room, which not only solves the problem of watching TV but also serves as a decorative element. If the living room is large, using an LCD TV with a larger screen will provide a better viewing experience and enhance the overall ambiance of the living room.
[0003] LCD TVs are generally assembled from an LCD screen and a TV casing. Currently, the assembly process involves first fixing the LCD screen to a work surface, then assembling the TV casing. While the operation is simple, problems arise during the LCD screen fixing process, such as insecure fixing and inaccurate alignment. Current LCD screen fixing equipment uses clamping devices to secure the four sides of the LCD screen to the work surface. Because LCD screens come in various sizes, the positions of the clamping components within the clamping device need to be adjusted according to the screen's specifications. This can easily lead to misalignment of the clamping components during assembly, causing the LCD screen to loosen and resulting in inaccurate alignment between the LCD screen and the TV casing. Therefore, a calibration and fixing device for LCD screens that can achieve high accuracy in clamping and calibrating the LCD screen is needed. Summary of the Invention
[0004] In order to overcome the shortcomings of current equipment for fixing LCD screens, such as insecure fixing and inaccurate calibration, the technical problem of the present invention is to provide a calibration and fixing device for LCD screens that can achieve high accuracy in clamping and calibrating LCD screens.
[0005] The technical solution of the present invention is: a calibration and fixing device for a liquid crystal display screen, comprising a base, a support frame, a rotating plate, a fixing frame, a first fixing slide rail, a closing mechanism, a limiting mechanism, and a clamping mechanism. A support frame is provided on one side of the top of the base, and a rotating plate is rotatably connected to the support frame. A fixing frame is provided on the top of the rotating plate, and a first fixing slide rail is provided on the top of the fixing frame. A closing mechanism is provided on the fixing frame, and a limiting mechanism is provided between the fixing frame and the closing mechanism. A clamping mechanism for clamping the liquid crystal display screen is provided on the limiting mechanism.
[0006] Preferably, the closing mechanism includes a first distance sensor, a first electric push rod, a first limiting plate, a rack, a rotating shaft, and a full gear. The first distance sensor is provided on the top of the fixed frame, the first electric push rod is provided on the inner top wall of the fixed frame, the first limiting plate is slidably connected to both sides of the fixed frame, the rack is provided at the bottom of the first limiting plate, and the rotating shaft is rotatably connected to the inner top wall of the fixed frame, with a full gear on the rotating shaft.
[0007] Preferably, the limiting mechanism includes a first pressure sensor, a second limiting plate, a reduction motor, a first connecting rod, and a second connecting rod. The second limiting plate is slidably connected to both sides of the fixed frame. The first limiting plate on one side is equipped with a first pressure sensor. The reduction motor is located in the middle of the bottom wall of the fixed frame. The output shaft of the reduction motor is equipped with a first connecting rod. The second connecting rod is rotatably connected to the inner bottom of the second limiting plate.
[0008] Preferably, the clamping mechanism includes a first clamping plate, a third connecting rod, and a fixing bolt. The third connecting rod is symmetrically and slidably connected to both the second limiting plate and the first limiting plate. A first clamping plate is provided between the tops of two adjacent third connecting rods. Fixing bolts are threadedly connected to both sides of the second limiting plate and the first limiting plate.
[0009] Preferably, the device also includes a pushing mechanism, which includes a second distance sensor, a second electric push rod, a first fixing plate, and a second clamping plate. The second distance sensor is provided on the second limiting plate on one side, and the second electric push rod is provided in the middle of the bottom wall of the fixing frame. The top of the telescopic rod of the second electric push rod is provided with a first fixing plate, and the top of the first fixing plate is provided with a second clamping plate for fixing the LCD screen.
[0010] Preferably, a cleaning mechanism is also included, comprising a second pressure sensor, a third electric push rod, a slide rod, a second fixed slide rail, a slider, a blower, and a photoelectric sensor. The second pressure sensor is located on one side of the top of the second clamping plate, and the third electric push rod is located at the bottom of the first limiting plate near the second distance sensor. A slide rod is located on one side of the telescopic rod of the third electric push rod, and the second fixed slide rail is located on the top of the first clamping plate near the third electric push rod. A slider is slidably connected to the top of the second fixed slide rail, and a blower for cleaning dust from the LCD screen is located on the top of the slider. A photoelectric sensor is located on one side of the inner wall of the second fixed slide rail.
[0011] Preferably, the system also includes an adjustment mechanism, which includes a second fixed plate, a lead screw, a turntable, and a fixed tube. The second fixed plate is connected to one side of the support frame, and the lead screw is threadedly connected to the second fixed plate. The turntable is located at the bottom of the lead screw, and the fixed tube is rotatably connected to the top of the lead screw.
[0012] Preferably, the device also includes a control box. The control box is located on one side of the fixed frame. The control box contains a switching power supply, a control module, and a power module. The switching power supply powers the entire device. The output terminal of the switching power supply is electrically connected to the power module. The power module is connected to a main power switch via a circuit. The control module and the power module are electrically connected. The control module is connected to a DS1302 clock circuit and a 24C02 circuit. The first distance sensor, the second distance sensor, the first pressure sensor, the second pressure sensor, and the photoelectric sensor are electrically connected to the control module. The first electric push rod, the second electric push rod, the third electric push rod, and the geared motor are connected to the control module via peripheral circuits.
[0013] Compared with the prior art, the present invention has the following advantages: 1. When the first distance sensor detects that the distance between itself and the liquid crystal display screen is less than the rated value, it triggers the telescopic rod of the first electric push rod to work, thereby driving the first limiting plate to move inward. The first pressure sensor triggers the reduction motor, thereby driving the second limiting plate to move inward. The first limiting plate and the second limiting plate clamp the liquid crystal display screen, which can play the role of calibrating and fixing the liquid crystal display screen.
[0014] 2. The second distance sensor triggers the second electric push rod, which drives the second clamping plate to move upward and cooperate with the first clamping plate to clamp the top and bottom of the LCD screen in both directions.
[0015] 3. The second pressure sensor triggers the third electric push rod, which in turn moves the blower to the left. Under the action of the airflow, the dust on the surface of the LCD screen can be cleaned. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.
[0017] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.
[0018] Figure 3 This is a schematic diagram of the first partial three-dimensional structure of the present invention.
[0019] Figure 4 This is a schematic diagram of the second partial three-dimensional structure of the present invention.
[0020] Figure 5 This is a three-dimensional structural diagram of the closing mechanism of the present invention.
[0021] Figure 6 This is a partial three-dimensional structural diagram of the closing mechanism of the present invention.
[0022] Figure 7 This is a three-dimensional structural diagram of the first part of the limiting mechanism of the present invention.
[0023] Figure 8 This is a three-dimensional structural diagram of the second part of the limiting mechanism of the present invention.
[0024] Figure 9 This is a three-dimensional structural diagram of the clamping mechanism of the present invention.
[0025] Figure 10 This is an enlarged schematic diagram of part A of the present invention.
[0026] Figure 11 This is a three-dimensional structural diagram of the first part of the driving mechanism of the present invention.
[0027] Figure 12 This is a three-dimensional structural diagram of the second part of the actuating mechanism of the present invention.
[0028] Figure 13 This is a three-dimensional structural diagram of the first part of the cleaning mechanism of the present invention.
[0029] Figure 14 This is a three-dimensional structural diagram of the second part of the cleaning mechanism of the present invention.
[0030] Figure 15 This is a three-dimensional structural diagram of the adjustment mechanism of the present invention.
[0031] Figure 16 This is a circuit block diagram of the present invention.
[0032] Figure 17 This is the circuit schematic diagram of the present invention.
[0033] Explanation of reference numerals in the attached drawings: 1_base, 2_support frame, 21_rotating plate, 3_fixed frame, 31_control box, 4_first fixed slide rail, 5_closing mechanism, 51_first distance sensor, 52_first electric push rod, 53_first limiting plate, 54_rack, 55_rotating shaft, 56_full gear, 6_limiting mechanism, 61_first pressure sensor, 62_second limiting plate, 63_reduction motor, 64_first connecting rod, 65_second connecting rod, 7_clamping mechanism, 71_first clamping Plate, 72_Third connecting rod, 73_Fixing bolt, 8_Pushing mechanism, 81_Second distance sensor, 82_Second electric push rod, 83_First fixing plate, 84_Second clamping plate, 9_Cleaning mechanism, 91_Second pressure sensor, 93_Third electric push rod, 94_Slide rod, 95_Second fixed slide rail, 96_Slider, 97_Blower, 98_Photoelectric sensor, 10_Adjusting mechanism, 101_Second fixing plate, 102_Lead screw, 103_Turntable, 104_Fixing tube. Detailed Implementation
[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0035] Example 1
[0036] A calibration fixing device for a liquid crystal display screen, such as Figure 1-17 As shown, it includes a base 1, a support frame 2, a rotating plate 21, a fixed frame 3, a first fixed slide rail 4, a closing mechanism 5, a limiting mechanism 6, and a clamping mechanism 7. The support frame 2 is located on the top left side of the base 1. The rotating plate 21 is rotatably connected to the upper part of the support frame 2. The fixed frame 3 is located on the top of the rotating plate 21. The first fixed slide rail 4 is located on the top of the fixed frame 3. The closing mechanism 5 is located on the fixed frame 3. The limiting mechanism 6 is located between the fixed frame 3 and the closing mechanism 5. The clamping mechanism 7 is located on the limiting mechanism 6.
[0037] The closing mechanism 5 includes a first distance sensor 51, a first electric push rod 52, a first limiting plate 53, a rack 54, a rotating shaft 55, and a full gear 56. The first distance sensor 51 is located in the middle of the top of the fixed frame 3. The first electric push rod 52 is located on the rear side of the inner top wall of the fixed frame 3. The first limiting plate 53 is slidably connected to both the front and rear sides of the fixed frame 3. The bottom of the first limiting plate 53 on the rear side is connected to the telescopic rod of the first electric push rod 52. The bottom of the first limiting plate 53 is provided with a rack 54. The rotating shaft 55 is rotatably connected to the middle of the inner top wall of the fixed frame 3. The full gear 56 is provided on the rotating shaft 55. The full gear 56 and the rack 54 mesh with each other.
[0038] The limiting mechanism 6 includes a first pressure sensor 61, a second limiting plate 62, a reduction motor 63, a first connecting rod 64, and a second connecting rod 65. The second limiting plate 62 is slidably connected to both the left and right sides of the upper part of the fixed frame 3. The first pressure sensor 61 is located in the middle of the first limiting plate 53 on the front side. The reduction motor 63 is located in the middle of the inner bottom wall of the fixed frame 3. The output shaft of the reduction motor 63 is equipped with the first connecting rod 64. The second connecting rod 65 is rotatably connected to the inner bottom of the second limiting plate 62. The second connecting rod 65 and the first connecting rod 64 are rotatably connected.
[0039] The clamping mechanism 7 includes a first clamping plate 71, a third connecting rod 72, and a fixing bolt 73. The third connecting rod 72 is symmetrically and slidably connected to the second limiting plate 62 and the first limiting plate 53. The third connecting rods 72 are respectively distributed along the length of the second limiting plate 62 and the first limiting plate 53. A first clamping plate 71 is provided between the tops of two adjacent third connecting rods 72. The fixing bolts 73 are threadedly connected to both sides of the second limiting plate 62 and the first limiting plate 53. The fixing bolts 73 are respectively close to the third connecting rods 72.
[0040] It also includes a pushing mechanism 8, which includes a second distance sensor 81, a second electric push rod 82, a first fixing plate 83 and a second clamping plate 84. The second distance sensor 81 is provided in the middle of the second limiting plate 62 on the right side. The second electric push rod 82 is provided in the middle of the bottom wall of the fixed frame 3. The first fixing plate 83 is provided at the top of the telescopic rod of the second electric push rod 82. The reduction motor 63 passes through the first fixing plate 83. The second clamping plate 84 is provided at the top of the first fixing plate 83.
[0041] It also includes a cleaning mechanism 9, which includes a second pressure sensor 91, a third electric push rod 93, a slide rod 94, a second fixed slide rail 95, a slider 96, a blower 97, and a photoelectric sensor 98. The second pressure sensor 91 is located in the middle of the rear side of the top of the second clamping plate 84. The third electric push rod 93 is located at the bottom of the first limiting plate 53 on the front side. The slide rod 94 is located on the right side of the telescopic rod of the third electric push rod 93. The second fixed slide rail 95 is located at the top of the first clamping plate 71 on the front side. The slide rod 94 passes through the second fixed slide rail 95. The slider 96 is slidably connected to the top of the second fixed slide rail 95. The right side of the slider 96 is connected to the left side of the slide rod 94. The blower 97 is located at the top of the slider 96. The photoelectric sensor 98 is located on the left side of the inner wall of the second fixed slide rail 95.
[0042] When calibrating and fixing the LCD screen, the device can be powered on first, the blower 97 turned on, and then the LCD screen placed on top of the first fixed slide rail 4. When the first distance sensor 51 detects that the distance between itself and the LCD screen is less than the rated value, the control module controls the telescopic rod of the first electric push rod 52 to extend for 2 seconds and then stop working. The extension of the telescopic rod of the first electric push rod 52 drives the first limiting plate 53 and rack 54 on the rear side to move forward, and drives the first limiting plate 53 and rack 54 on the front side to move backward through the full gear 56. The backward movement of the first limiting plate 53 on the front side drives the first pressure sensor 61 to move backward. The two first limiting plates 53 move to limit the front and rear sides of the LCD screen. When the first pressure sensor 61 contacts the LCD screen and detects that the pressure value is greater than the rated value, the control module controls the output shaft of the reduction motor 63 to rotate forward for 2 seconds and then automatically stop working. The output of the reduction motor 63... The shaft rotates clockwise, causing the first connecting rod 64 to rotate. This rotation, via the second connecting rod 65, moves the second limiting plate 62 inwards. The inward movement of the second limiting plate 62 limits the left and right sides of the LCD screen. The inward movement of the first limiting plate 53 and the second limiting plate 62 further moves the first clamping plate 71, the third connecting rod 72, and the fixing bolt 73 inwards. When the first limiting plate 53 and the second limiting plate 62 stop moving, the first clamping plate 71 is positioned above the LCD screen. The fixing bolt 73 can then be rotated to separate from the third connecting rod 72. The first clamping plate 71 can then be manually moved downwards until it is flush with the top of the LCD screen. The fixing bolt 73 is then rotated to slowly clamp the third connecting rod 72. This ensures that the first clamping plate 71 holds the LCD screen in place, improving its stability and achieving the effect of calibrating and fixing the LCD screen.
[0043] The second limiting plate 62 moves inward, causing the second distance sensor 81 to move to the left. When the second distance sensor 81 detects that the distance between itself and the LCD screen is less than the rated value, the control module controls the second electric push rod 82 to extend for 1 second and then automatically stop working. The extension of the second electric push rod 82 causes the first fixing plate 83 and the second clamping plate 84 to move upward. The upward movement of the second clamping plate 84 can push the bottom of the LCD screen upward, while the first clamping plate 71 blocks the top of the LCD screen. Under the action of the second clamping plate 84 and the first clamping plate 71, the LCD screen can be clamped.
[0044] The second clamping plate 84 moves upward, causing the second pressure sensor 91 to move upward. When the second pressure sensor 91 detects a pressure value greater than the rated value, the control module controls the telescopic rod of the third electric push rod 93 to retract for 2 seconds and then automatically stops working. The retraction of the telescopic rod of the third electric push rod 93 causes the slide rod 94 and the slider 96 to move to the left. The leftward movement of the slider 96 causes the blower 97 to move to the left. During the leftward movement of the blower 97, the blown air cleans the dust on the top of the LCD screen. When the slider 96 moves to the left and approaches the photoelectric sensor 98, the slider 96 will gradually block the photoelectric sensor 98, and the light around the photoelectric sensor 98 will be blocked. When the brightness value decreases, and the photoelectric sensor 98 detects that the brightness value is less than the rated value, the control module controls the extension rod of the third electric push rod 93 to extend for 2 seconds and then automatically stop working. The extension rod of the third electric push rod 93 causes the slide rod 94, slider 96, and the components above it to move to the right and reset. At this time, the position of the LCD screen has been calibrated and the cleaning work of the LCD screen is completed. The staff can then assemble the TV casing and the LCD screen. The assembly work needs to be completed within 10 minutes. 10 minutes after the extension rod of the third electric push rod 93 automatically stops working after extending, the control module controls the first electric push rod 52 After the telescopic rod retracts for 2 seconds, it stops working. The retraction of the telescopic rod of the first electric push rod 52 drives the rear first limiting plate 53 and rack 54 to move backward. Through the full gear 56, it drives the front first limiting plate 53 and rack 54 to move forward. The forward movement of the front first limiting plate 53 drives the first pressure sensor 61 to move forward. The two first limiting plates 53 respectively release the front and rear sides of the LCD screen. The first pressure sensor 61 moves away from the LCD screen. When the first pressure sensor 61 detects that the pressure value is less than the rated value, the control module controls the output shaft of the reduction motor 63 to reverse for 2 seconds and then automatically stops working. The reverse rotation of the output shaft of the reduction motor 63 drives... The first connecting rod 64 rotates, which in turn drives the second limiting plate 62 to move outward via the second connecting rod 65. The outward movement of the second limiting plate 62 can release the left and right sides of the LCD screen. The outward movement of the second limiting plate 62 causes the second distance sensor 81 to move to the right, and the second distance sensor 81 and the LCD screen slowly separate. When the second distance sensor 81 detects that the distance between it and the LCD screen is greater than the rated value, the control module controls the second electric push rod 82 to shorten its telescopic rod for 1 second and then automatically stop working. The shortening of the telescopic rod of the second electric push rod 82 causes the first fixing plate 83 and the second clamping plate 84 to move downward.The user can rotate the fixing bolt 73 to separate it from the third connecting rod 72, then manually move the first clamping plate 71 upwards until it separates from the top of the LCD screen. Next, rotate the fixing bolt 73 to slowly clamp the third connecting rod 72, thus releasing the LCD screen from the first clamping plate 71 and the second clamping plate 84. The user can then remove the LCD screen. When not in use, the device can be powered off, and the blower 97 can be turned off. Furthermore, the operator can adjust the working time of the first electric push rod 52 and the second electric push rod 82 according to the size of the LCD screen, thereby controlling the distance the first limit plate 53 and the second limit plate 62 move.
[0045] It also includes an adjustment mechanism 10, which includes a second fixed plate 101, a lead screw 102, a turntable 103, and a fixed tube 104. The second fixed plate 101 is connected to the upper right side of the support frame 2. The lead screw 102 is threadedly connected to the second fixed plate 101. The turntable 103 is provided at the bottom of the lead screw 102. The fixed tube 104 is rotatably connected to the top of the lead screw 102. The fixed tube 104 is movably connected to the lower right side of the fixed frame 3.
[0046] If it is necessary to adjust the angle of the fixed frame 3, the turntable 103 can be rotated to drive the lead screw 102 to rotate. The lead screw 102 rotates on the second fixed plate 101, which will cause the lead screw 102 to move up and down, thereby driving the fixed tube 104 to move up and down, and thus causing the fixed frame 3 and the rotating plate 21 to rotate. The angle of the fixed frame 3 is adjusted, which makes it easier for the staff to install the outer shell on the LCD screen.
[0047] It also includes a control box 31. The control box 31 is located on the front side of the fixed frame 3. The control box 31 contains a switching power supply, a control module, and a power module. The switching power supply supplies power to the entire device. The output terminal of the switching power supply is electrically connected to the power module. The power module is connected to the main power switch via a line. The control module and the power module are electrically connected. The control module is connected to a DS1302 clock circuit and a 24C02 circuit. The first distance sensor 51, the second distance sensor 81, the first pressure sensor 61, the second pressure sensor 91, and the photoelectric sensor 98 are electrically connected to the control module. The first electric push rod 52, the second electric push rod 82, the third electric push rod 93, and the geared motor 63 are connected to the control module via peripheral circuits.
[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention 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 invention.
Claims
1. A calibration and fixing device for a liquid crystal display screen, characterized in that: It includes a base (1), a support frame (2), a rotating plate (21), a fixed frame (3), a first fixed slide rail (4), a closing mechanism (5), a limiting mechanism (6), and a clamping mechanism (7). The base (1) has a support frame (2) on one side of its top. The support frame (2) is rotatably connected to the rotating plate (21). The top of the rotating plate (21) has a fixed frame (3). The top of the fixed frame (3) has a first fixed slide rail (4). The fixed frame (3) has a closing mechanism (5). The fixed frame (3) and the closing mechanism (5) have a limiting mechanism (6). The limiting mechanism (6) has a clamping mechanism (7) for clamping the LCD screen.
2. The calibration and fixing device for a liquid crystal display screen according to claim 1, characterized in that: The closing mechanism (5) includes a first distance sensor (51), a first electric push rod (52), a first limiting plate (53), a rack (54), a rotating shaft (55), and a full gear (56). The first distance sensor (51) is provided on the top of the fixed frame (3), the first electric push rod (52) is provided on the inner top wall of the fixed frame (3), the first limiting plate (53) is slidably connected to both sides of the fixed frame (3), the rack (54) is provided at the bottom of the first limiting plate (53), the rotating shaft (55) is rotatably connected to the inner top wall of the fixed frame (3), and the full gear (56) is provided on the rotating shaft (55).
3. A calibration and fixing device for a liquid crystal display screen according to claim 2, characterized in that: The limiting mechanism (6) includes a first pressure sensor (61), a second limiting plate (62), a reduction motor (63), a first connecting rod (64), and a second connecting rod (65). The second limiting plate (62) is slidably connected to both sides of the fixed frame (3). The first limiting plate (53) on one side is provided with the first pressure sensor (61). The reduction motor (63) is provided in the middle of the bottom wall of the fixed frame (3). The output shaft of the reduction motor (63) is provided with the first connecting rod (64). The second connecting rod (65) is rotatably connected to the inner side of the bottom of the second limiting plate (62).
4. A calibration and fixing device for a liquid crystal display screen according to claim 3, characterized in that: The clamping mechanism (7) includes a first clamping plate (71), a third connecting rod (72) and a fixing bolt (73). The third connecting rod (72) is symmetrically slidably connected to the second limiting plate (62) and the first limiting plate (53). The first clamping plate (71) is provided between the tops of two adjacent third connecting rods (72). The fixing bolt (73) is threadedly connected to both sides of the second limiting plate (62) and the first limiting plate (53).
5. A calibration and fixing device for a liquid crystal display screen according to claim 4, characterized in that: It also includes a pushing mechanism (8), which includes a second distance sensor (81), a second electric push rod (82), a first fixing plate (83) and a second clamping plate (84). The second distance sensor (81) is provided on the second limiting plate (62) on one side. The second electric push rod (82) is provided in the middle of the bottom wall of the fixing frame (3). The first fixing plate (83) is provided at the top of the telescopic rod of the second electric push rod (82). The second clamping plate (84) for fixing the liquid crystal display screen is provided at the top of the first fixing plate (83).
6. A calibration and fixing device for a liquid crystal display screen according to claim 5, characterized in that: It also includes a cleaning mechanism (9), which includes a second pressure sensor (91), a third electric push rod (93), a slide rod (94), a second fixed slide rail (95), a slider (96), a blower (97), and a photoelectric sensor (98). The second pressure sensor (91) is provided on one side of the top of the second clamping plate (84). The third electric push rod (93) is provided at the bottom of the first limiting plate (53) near the second distance sensor (81). The slide rod (94) is provided on one side of the telescopic rod of the third electric push rod (93). The second fixed slide rail (95) is provided on the top of the first clamping plate (71) near the third electric push rod (93). The slider (96) is slidably connected to the top of the second fixed slide rail (95). The blower (97) for cleaning dust on the LCD screen is provided on the top of the slider (96). The photoelectric sensor (98) is provided on one side of the inner wall of the second fixed slide rail (95).
7. A calibration and fixing device for a liquid crystal display screen according to claim 6, characterized in that: It also includes an adjustment mechanism (10), which includes a second fixed plate (101), a lead screw (102), a turntable (103) and a fixed tube (104). The second fixed plate (101) is connected to one side of the support frame (2). The lead screw (102) is threadedly connected to the second fixed plate (101). The turntable (103) is provided at the bottom of the lead screw (102). The fixed tube (104) is rotatably connected to the top of the lead screw (102).
8. A calibration and fixing device for a liquid crystal display screen according to claim 7, characterized in that: It also includes a control box (31). The control box (31) is located on one side of the fixed frame (3). The control box (31) contains a switching power supply, a control module and a power module. The switching power supply supplies power to the entire device. The output terminal of the switching power supply is electrically connected to the power module. The power module is connected to the main power switch via a line. The control module and the power module are electrically connected. The control module is connected to the DS1302 clock circuit and the 24C02 circuit. The first distance sensor (51), the second distance sensor (81), the first pressure sensor (61), the second pressure sensor (91) and the photoelectric sensor (98) are electrically connected to the control module. The first electric push rod (52), the second electric push rod (82), the third electric push rod (93) and the geared motor (63) are connected to the control module via peripheral circuits.