CN114434369A - Calibration fixing device for liquid crystal display - Google Patents

Abstract

The invention relates to a fixing device, in particular to a calibration fixing device for a liquid crystal display screen. The technical problem of the invention is as follows: the utility model provides a can realize pressing from both sides tight and the high calibration fixing device for liquid crystal display of calibration degree of accuracy to liquid crystal display. The technical scheme of the invention is as follows: the utility model provides a calibration fixing device for liquid crystal display, is including base, support frame, rotor plate, fixed frame, first fixed slide rail, fold mechanism and stop gear, and base top one side is equipped with the support frame, and the rotation type is connected with the rotor plate on the support frame, and the rotor plate top is equipped with fixed frame, and fixed frame top is equipped with first fixed slide rail, is equipped with on the fixed frame and folds the mechanism, fixes the frame and folds and be equipped with stop gear between the mechanism. The second distance sensor triggers a second electric push rod to drive the second clamping plate to move upwards to be matched with the first clamping plate, and the top and the bottom of the liquid crystal display screen are clamped in a two-way mode.

Description

A calibration fixture for liquid crystal display

technical field

The invention relates to a fixing device, in particular to a calibration fixing device for a liquid crystal display screen.

Background technique

With the continuous development of society, people's living standards are also constantly improving, people have higher and higher requirements for their quality of life, and material requirements increase accordingly. LCD TVs have become a necessity for every household. Now LCD TVs on the market are Most of the LCD screens are large in size. LCD TVs are generally placed in the living room. In addition to solving the problem of watching TV, it can also play a decorative effect on the living room. If the living room is relatively large, use a larger LCD screen. The effect of the LCD TV will be better, which can improve the grade of the living room.

The LCD TV is generally assembled from the LCD screen and the TV shell. Now, in the process of assembling the LCD screen and the TV shell, the LCD screen needs to be fixed on the working plane first, and then the TV shell is assembled to operate. Although it is simple, in the process of fixing the LCD screen, there will be problems such as unstable fixation and inaccurate correction. Now the equipment for fixing the LCD screen, the four sides of the LCD screen are respectively fixed to the work by the clamping device. On the plane, since the specifications of the LCD screen are different, it is necessary to adjust the position of the clamping member in the clamping device according to the specifications of the LCD screen. During the process, the clamping piece will be offset, so that the assembled LCD screen will be loosened, resulting in inaccurate alignment of the assembly position between the LCD screen and the TV casing. Alignment fixtures for high-accuracy LCD panels that perform clamping and alignment.

SUMMARY OF THE INVENTION

In order to overcome the shortcomings of the current equipment for fixing the liquid crystal display screen, the fixation is not firm and the calibration is inaccurate. Use calibration fixtures.

The technical scheme of the present invention is: a calibration 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 limit mechanism and a clamping mechanism, and a top of the base is A support frame is arranged on the side, a rotating plate is rotatably connected to the support frame, a fixed frame is arranged on the top of the rotating plate, a first fixed sliding rail is arranged on the top of the fixed frame, and a closing mechanism is arranged on the fixed frame. A limiting mechanism is provided, and a clamping mechanism for clamping the liquid crystal display screen is arranged on the limiting mechanism.

Preferably, the closing mechanism includes a first distance sensor, a first electric push rod, a first limit plate, a rack, a rotating shaft and a full gear, the top of the fixed frame is provided with a first distance sensor, and the inner top wall of the fixed frame is provided with a first distance sensor. An electric push rod, both sides of the fixed frame are slidably connected with a first limit plate, the bottom of the first limit plate is provided with a rack, the inner top wall of the fixed frame is rotatably connected with a rotating shaft, and the rotating shaft is provided with a full gear.

Preferably, the limiting mechanism includes a first pressure sensor, a second limiting plate, a deceleration motor, a first connecting rod and a second connecting rod, and both sides of the fixing frame are slidably connected with a second limiting plate, and one side is slidably connected to the second limiting plate. The first limit plate is provided with a first pressure sensor, the middle of the inner bottom wall of the fixed frame is provided with a deceleration motor, the output shaft of the deceleration motor is provided with a first connecting rod, and the inner side of the bottom of the second limit plate is rotatably connected with a second connecting rod .

Preferably, the clamping mechanism includes a first clamping plate, a third connecting rod and a fixing bolt, the second limiting plate and the first limiting plate are symmetrically connected with a third connecting rod in a sliding manner, and the adjacent two A first clamping plate is arranged between the tops of the third connecting rods, and fixing bolts are threadedly connected to both sides of the second limiting plate and the first limiting plate.

Preferably, it also includes a push mechanism, the push mechanism includes a second distance sensor, a second electric push rod, a first fixing plate and a second clamping plate, and the second limit plate on one side is provided with a second distance sensor A second electric push rod is arranged in the middle of the inner 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 liquid crystal display screen.

Preferably, a cleaning mechanism is also included. The cleaning mechanism includes a second pressure sensor, a third electric push rod, a sliding rod, a second fixed sliding rail, a sliding block, a hair dryer and a photoelectric sensor. The top side of the second clamping plate is provided with There is a second pressure sensor, a third electric push rod is arranged at the bottom of the first limit plate on the side close to the second distance sensor, and a sliding rod is arranged on the telescopic rod side of the third electric push rod, and a sliding rod is arranged near the third electric push rod. The top of the first clamping plate on the side is provided with a second fixed slide rail, the top of the second fixed slide rail is slidably connected with a slider, the top of the slider is provided with a blower for cleaning the dust on the LCD screen, and the inner wall of the second fixed slide rail is There is a photoelectric sensor on one side.

Preferably, it also includes an adjustment mechanism, the adjustment mechanism includes a second fixing plate, a screw rod, a turntable and a fixing pipe, a second fixing plate is connected to one side of the support frame, and a screw rod is threadedly connected to the second fixing plate, and the screw The bottom of the rod is provided with a turntable, and the top of the screw rod is rotatably connected with a fixed tube.

Preferably, it also includes a control box, a control box is arranged on one side of the fixed frame, and a switching power supply, a control module and a power supply module are installed in the control box, the switching power supply supplies power to the whole device, and the output end of the switching power supply and the power supply module are electrically connected. Connection, the power module is connected with the main power switch through the line, the control module and the power module are electrically connected, the control module is connected with the DS1302 clock circuit and the 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, and the first electric push rod, the second electric push rod, the third electric push rod and the deceleration motor are connected to the control module through a peripheral circuit.

Compared with the prior art, the present invention has the following advantages: 1. The distance between the first distance sensor and the liquid crystal display screen is detected to be less than the rated value, and the telescopic rod of the first electric push rod is triggered to work, thereby driving the first limiter; The position plate moves inward, and the deceleration motor is triggered by the first pressure sensor, which in turn drives the second limit plate to move inward. The first limit plate and the second limit plate clamp the liquid crystal display screen, which can calibrate and fix The role of the LCD screen.

2. The second distance sensor triggers the second electric push rod, which drives the second clamping plate to move up and cooperate with the first clamping plate to clamp the top and bottom of the LCD screen in both directions.

3. The second pressure sensor triggers the third electric push rod, and then drives the blower to move to the left. Under the action of the wind, the dust on the surface of the liquid crystal display screen can be cleaned.

Description of drawings

FIG. 1 is a schematic diagram of a first three-dimensional structure of the present invention.

FIG. 2 is a schematic diagram of a second three-dimensional structure of the present invention.

FIG. 3 is a schematic diagram of a first partial three-dimensional structure of the present invention.

FIG. 4 is a schematic diagram of a second partial three-dimensional structure of the present invention.

FIG. 5 is a schematic three-dimensional structure diagram of the closing mechanism of the present invention.

FIG. 6 is a partial three-dimensional structural schematic diagram of the closing mechanism of the present invention.

FIG. 7 is a schematic diagram of the first part of the three-dimensional structure of the limiting mechanism of the present invention.

FIG. 8 is a schematic diagram of the second part of the three-dimensional structure of the limiting mechanism of the present invention.

FIG. 9 is a schematic three-dimensional structure diagram of the clamping mechanism of the present invention.

Figure 10 is an enlarged schematic view of Part A of the present invention.

11 is a schematic diagram of the first part of the three-dimensional structure of the pushing mechanism of the present invention.

FIG. 12 is a schematic diagram of the second part of the three-dimensional structure of the pushing mechanism of the present invention.

FIG. 13 is a schematic view of the first part of the three-dimensional structure of the cleaning mechanism of the present invention.

FIG. 14 is a schematic view of the second part of the three-dimensional structure of the cleaning mechanism of the present invention.

FIG. 15 is a schematic three-dimensional structure diagram of the adjusting mechanism of the present invention.

16 is a circuit block diagram of the present invention.

FIG. 17 is a circuit schematic diagram of the present invention.

Description of reference numerals: 1_base, 2_support frame, 21_rotating plate, 3_fixed frame, 31_control box, 4_first fixed slide rail, 5_close mechanism, 51_first distance sensor, 52 _first electric push rod, 53_first limit plate, 54_rack, 55_rotating shaft, 56_full gear, 6_limiting mechanism, 61_first pressure sensor, 62_second limiter, 63_gear motor, 64_first connecting rod, 65_second connecting rod, 7_clamping mechanism, 71_first clamping plate, 72_third connecting rod, 73_fixing bolt, 8_push mechanism, 81_Second distance sensor, 82_Second electric push rod, 83_First fixed plate, 84_Second clamping plate, 9_Cleaning mechanism, 91_Second pressure sensor, 93_Third electric push rod, 94_slide bar, 95_second fixed slide rail, 96_slider, 97_hair dryer, 98_photoelectric sensor, 10_adjustment mechanism, 101_second fixed plate, 102_screw, 103_turntable, 104_ Fixed tube.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

A calibration fixing device for a liquid crystal display screen, as shown in Figure 1-17, includes a base 1, a support frame 2, a rotating plate 21, a fixing frame 3, a first fixing slide rail 4, a closing mechanism 5, and a limit mechanism 6 and the clamping mechanism 7, a support frame 2 is arranged on the left side of the top of the base 1, a rotating plate 21 is rotatably connected to the upper part of the support frame 2, a fixed frame 3 is arranged on the top of the rotating plate 21, and a first fixed slide rail is arranged on the top of the fixed frame 3 4. A closing mechanism 5 is arranged on the fixed frame 3 , a limiting mechanism 6 is arranged between the fixing frame 3 and the closing mechanism 5 , and a clamping mechanism 7 is arranged on the limiting mechanism 6 .

The closing mechanism 5 includes a first distance sensor 51 , a first electric push rod 52 , a first limit plate 53 , a rack 54 , a rotating shaft 55 and a full gear 56 , and a first distance sensor 51 is arranged in the middle of the top of the fixed frame 3 . The rear side of the inner top wall of the frame 3 is provided with a first electric push rod 52, the front and rear sides of the fixed frame 3 are slidably connected with a first limit plate 53, the bottom of the first limit plate 53 on the rear side and the first electric push rod 52 is connected with the telescopic rod, the bottom of the first limit plate 53 is provided with a rack 54, the middle of the inner top wall of the fixed frame 3 is rotatably connected with a rotating shaft 55, and the rotating shaft 55 is provided with a full gear 56, full gear 56 and rack 54 mesh.

The limit mechanism 6 includes a first pressure sensor 61 , a second limit plate 62 , a deceleration motor 63 , a first connecting rod 64 and a second connecting rod 65 , and the left and right sides of the upper part of the fixed frame 3 are slidably connected with a second The limit plate 62, the first limit plate 53 on the front side is provided with a first pressure sensor 61, the middle of the inner bottom wall of the fixed frame 3 is provided with a deceleration motor 63, and the output shaft of the deceleration motor 63 is provided with a first connecting rod 64, The inner sides of the bottoms of the two limiting plates 62 are rotatably connected with a second connecting rod 65 , and the second connecting rod 65 is rotatably connected with the first connecting rod 64 .

The clamping mechanism 7 includes a first clamping plate 71, a third connecting rod 72 and a fixing bolt 73. The second limiting plate 62 and the first limiting plate 53 are symmetrically slidably connected with a third connecting rod 72, The third connecting rods 72 are respectively distributed in the length direction of the second limiting plate 62 and the first limiting plate 53 , and a first clamping plate 71 is provided between the tops of the two adjacent third connecting rods 72 . Both sides of the limiting plate 62 and the first limiting plate 53 are threadedly connected with fixing bolts 73 , and the fixing bolts 73 are respectively close to the third connecting rod 72 .

It also includes a pushing mechanism 8. The pushing mechanism 8 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 limit plate 62 on the right side is provided in the middle. There is a second distance sensor 81, a second electric push rod 82 is arranged in the middle of the inner bottom wall of the fixing frame 3, a first fixing plate 83 is arranged on the top of the telescopic rod of the second electric push rod 82, and the deceleration motor 63 passes through the first fixing plate 83, the top of the first fixing plate 83 is provided with a second clamping plate 84.

Also includes a cleaning mechanism 9, the cleaning mechanism 9 includes a second pressure sensor 91, a third electric push rod 93, a slide bar 94, a second fixed slide rail 95, a slider 96, a blower 97 and a photoelectric sensor 98, the second clip A second pressure sensor 91 is provided in the middle of the top rear side of the tightening plate 84 , a third electric push rod 93 is provided at the bottom of the first limit plate 53 on the front side, and a sliding rod is provided on the right side of the telescopic rod of the third electric push rod 93 94, the top of the first clamping plate 71 on the front side is provided with a second fixed slide rail 95, the slide bar 94 passes through the second fixed slide rail 95, and the top of the second fixed slide rail 95 is slidably connected with a slider 96, and the slider The right side of 96 is connected to the left side of the sliding rod 94 , the top of the sliding block 96 is provided with a blower 97 , and the left side of the inner wall of the second fixed slide rail 95 is provided with a photoelectric sensor 98 .

When people need to calibrate and fix the LCD screen, they can first power on the device, turn on the hair dryer 97, and then place the LCD screen on the top of the first fixed slide rail 4. The first distance sensor 51 detects and the LCD screen When the distance between the screens 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 stops working. The position plate 53 and the rack 54 move forward, and the full gear 56 drives the front first limit plate 53 and the rack 54 to move backward, and the front first limit plate 53 moves backward to drive the first pressure sensor. 61 moves backward, and the two first limit plates 53 move to limit the front and rear sides of the liquid crystal display screen. When the first pressure sensor 61 contacts the liquid crystal display screen and detects that the pressure value is greater than the rated value, the control module controls the deceleration motor. The output shaft of 63 rotates forward for 2 seconds and then automatically stops working. The forward rotation of the output shaft of the deceleration motor 63 drives the first connecting rod 64 to rotate, and the first connecting rod 64 rotates through the second connecting rod 65 to drive the second limit plate. 62 moves inward, and the second limit plate 62 moves inward to limit the left and right sides of the LCD screen; the first limit plate 53 and the second limit plate 62 move inward to drive the first clamp The plate 71, the third connecting rod 72 and the fixing bolt 73 move inward. When the first limiting plate 53 and the second limiting plate 62 stop moving, the first clamping plate 71 is located above the liquid crystal display screen, respectively. The fixing bolt 73 can be rotated to separate the fixing bolt 73 from the third connecting rod 72, and then the first clamping plate 71 is manually moved down to fit with the top of the LCD screen, and then the fixing bolt 73 is rotated and slowly clamped The third connecting rod 72 can keep the first clamping plate 71 clamped to the liquid crystal display screen, which can improve the stability of the liquid crystal display screen and achieve the effect of calibrating and fixing the liquid crystal display screen.

The inward movement of the second limit plate 62 drives the second distance sensor 81 to move to the left. When the second distance sensor 81 detects that the distance from the liquid crystal display screen is less than the rated value, the control module controls the second electric push rod 82 to expand and contract. After the rod is extended for 1 second, it automatically stops working. The extension of the second electric push rod 82 and the extension rod drives the first fixing plate 83 and the second clamping plate 84 to move upward. The bottom is upward and the top of the LCD screen is blocked by the first clamping plate 71. Under the action between the second clamping plate 84 and the first clamping plate 71, the LCD screen can be clamped. .

The upward movement of the second clamping plate 84 drives the second pressure sensor 91 to move upward. When the second pressure sensor 91 detects that the pressure value is greater than the rated value, the control module controls the telescopic rod of the third electric push rod 93 to perform a retracting motion for 2 seconds and then automatically Stop working, the telescopic rod of the third electric push rod 93 shrinks to drive the slide rod 94 and the slider 96 to move to the left, and the slider 96 moves to the left to drive the blower 97 to move to the left. Clean the dust on the top of the liquid crystal display 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 value around the photoelectric sensor 98 will decrease. The photoelectric sensor 98 detects When the light value is less than the rated value, the control module controls the telescopic rod of the third electric push rod 93 to stretch for 2 seconds and then automatically stops working, and the telescopic rod of the third electric push rod 93 stretches to drive the sliding rod 94 and the sliding rod. Block 96 and the above components are moved to the right and reset. At this time, the position of the LCD screen has been calibrated, and the cleaning of the LCD screen is completed. The staff can assemble the TV casing and the LCD screen. The assembly work needs to be done in 10. Completed within minutes; 10 minutes after the telescopic rod of the third electric push rod 93 automatically stops working after stretching, the control module controls the telescopic rod of the first electric push rod 52 to shrink for 2 seconds and then stops working, and the first electric push rod 52 stops working. The retraction of the telescopic rod of the push rod 52 drives the first limit plate 53 and the rack 54 on the rear side to move backward, and the full gear 56 drives the first limit plate 53 and the rack 54 on the front side to move forward. The forward movement of the first limit plate 53 drives the first pressure sensor 61 to move forward, the two first limit plates 53 are respectively released from the front and rear sides of the liquid crystal display screen, the first pressure sensor 61 is far away from the liquid crystal display screen, the first When the pressure sensor 61 detects that the pressure value is less than the rated value, the control module controls the output shaft of the deceleration motor 63 to reverse for 2 seconds and then automatically stops working. The output shaft of the deceleration motor 63 reverses and drives the first connecting rod 64 to rotate. When the connecting rod 64 rotates, the second connecting rod 65 drives the second limit plate 62 to move to the outside, and the second limit plate 62 moves to the outside to loosen the left and right sides of the liquid crystal display screen; the second limit plate 62 Moving to the outside drives the second distance sensor 81 to move to the right, and the second distance sensor 81 and the liquid crystal display screen are slowly separated. When the second distance sensor 81 detects that the distance between the second distance sensor 81 and the liquid crystal display screen is greater than the rated value, the control module controls The telescopic rod of the second electric push rod 82 is shortened for 1 second and automatically stops working. The shortening of the telescopic rod of the second electric push rod 82 drives the first fixing plate 83 and the second clamping plate 84 to move downward; people can rotate the fixing bolt 73, Separate the fixing bolt 73 from the third connecting rod 72, then manually move the first clamping plate 71 upward to separate from the top of the LCD screen, and then rotate the fixing bolt 73 to slowly clamp the third connecting rod 72, so that The first clamping plate 71 and the second clamping plate 84 can be made to release the liquid crystal display screen, and people can take out the liquid crystal display screen, When not in use, the device can be powered off and the hair dryer 97 is turned off; and the staff can adjust the working hours of the first electric push rod 52 and the second electric push rod 82 according to the specifications of the liquid crystal display screen, and then can control The distance that the first limiting plate 53 and the second limiting plate 62 move.

It also includes an adjustment mechanism 10. The adjustment mechanism 10 includes a second fixing plate 101, a screw rod 102, a turntable 103 and a fixing pipe 104. The upper right side of the support frame 2 is connected with a second fixing plate 101. The second fixing plate 101 is threaded. The screw rod 102 is connected with the screw rod 102 , the bottom of the screw rod 102 is provided with a turntable 103 , the top of the screw rod 102 is rotatably connected with a fixed tube 104 , and the fixed tube 104 is movably connected with the lower part of the right side of the fixed frame 3 .

If the angle of the fixing frame 3 needs to be adjusted, the screw rod 102 can be rotated by rotating the turntable 103. The screw rod 102 rotates on the second fixing plate 101, which will cause the screw rod 102 to move up and down, which in turn drives the fixed tube 104 to move up and down. , so that the fixed frame 3 and the rotating plate 21 are rotated, and the angle of the fixed frame 3 is adjusted, so that it is convenient for the staff to install the casing on the liquid crystal display screen.

It also includes a control box 31, the front side of the fixed frame 3 is provided with a control box 31, a switching power supply, a control module and a power supply module are installed in the control box 31, the switching power supply supplies power for the whole device, and the output end of the switching power supply and the power supply module are electrically connected. The power supply module is connected with the main power switch through the line, the control module and the power supply module are electrically connected, the control module is connected with the DS1302 clock circuit and the 24C02 circuit, the first distance sensor 51, the second distance sensor 81, the first distance sensor 81, the first distance sensor The pressure sensor 61, the second pressure sensor 91 and the photoelectric sensor 98 are connected through the electrical and control module, the first electric push rod 52, the second electric push rod 82, the third electric push rod 93 and the deceleration motor 63 are controlled by the peripheral circuit and Module connection.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. Within the knowledge scope of those skilled in the art, various modifications can be made without departing from the spirit of the present invention. kind of change.

Claims (8)

1. A calibration fixing device for a liquid crystal display screen, characterized in that it comprises a base (1), a support frame (2), a rotating plate (21), a fixing frame (3), a first fixing slide rail (4), The closing mechanism (5), the limiting mechanism (6) and the clamping mechanism (7) are provided with a support frame (2) on the top side of the base (1), and a rotating plate (21) is rotatably connected to the support frame (2). , the top of the rotating plate (21) is provided with a fixed frame (3), the top of the fixed frame (3) is provided with a first fixed slide rail (4), the fixed frame (3) is provided with a closing mechanism (5), the fixed frame (3) ) and the closing mechanism (5), a limiting mechanism (6) is provided, and the limiting mechanism (6) is provided with a clamping mechanism (7) for clamping the liquid crystal display screen. 2. A calibration fixing device for a liquid crystal display screen according to claim 1, characterized in that: the closing mechanism (5) comprises a first distance sensor (51), a first electric push rod (52), a first limiter The position plate (53), the rack (54), the rotating shaft (55) and the full gear (56) are provided with a first distance sensor (51) on the top of the fixing frame (3), and a second distance sensor (51) on the inner top wall of the fixing frame (3). An electric push rod (52), a first limit plate (53) is slidably connected on both sides of the fixed frame (3), and a rack (54) is provided at the bottom of the first limit plate (53), and the fixed frame ( 3) A rotating shaft (55) is rotatably connected to the inner top wall, and a full gear (56) is arranged on the rotating shaft (55). 3. A calibration fixing device for a liquid crystal display according to claim 2, characterized in that: the limit mechanism (6) comprises a first pressure sensor (61), a second limit plate (62), a deceleration motor (63), the first connecting rod (64) and the second connecting rod (65), both sides of the fixing frame (3) are slidably connected with a second limit plate (62), and the first limit plate ( 53) A first pressure sensor (61) is provided, a reduction motor (63) is arranged in the middle of the inner bottom wall of the fixing frame (3), a first connecting rod (64) is arranged on the output shaft of the reduction motor (63), and a second limit The inner side of the bottom of the plate (62) is rotatably connected with a second connecting rod (65). 4. A calibration fixing device for a liquid crystal display screen according to claim 3, characterized in that: the clamping mechanism (7) comprises a first clamping plate (71), a third connecting rod (72) and a fixing bolt (73), the second limiting plate (62) and the first limiting plate (53) are symmetrically slidably connected with third connecting rods (72), and the tops of the two adjacent third connecting rods (72) A first clamping plate (71) is arranged therebetween, and both sides of the second limiting plate (62) and the first limiting plate (53) are threadedly connected with fixing bolts (73). 5. A calibration fixing device for a liquid crystal display screen according to claim 4, characterized in that it further comprises a pushing mechanism (8), and the pushing mechanism (8) comprises a second distance sensor (81), a second electric motor The push rod (82), the first fixing plate (83) and the second clamping plate (84), a second distance sensor (81) is provided on the second limiting plate (62) on one side, and the fixing frame (3) A second electric push rod (82) is arranged in the middle of the inner bottom wall, the top of the telescopic rod of the second electric push rod (82) is provided with a first fixing plate (83), and the top of the first fixing plate (83) is provided with a fixing plate for fixing the liquid crystal Second clamping plate (84) for display screen. 6. A calibration fixing device for a liquid crystal display screen according to claim 5, characterized in that it further comprises a cleaning mechanism (9), and the cleaning mechanism (9) comprises a second pressure sensor (91), a third electric motor Push rod (93), sliding rod (94), second fixed slide rail (95), sliding block (96), blower (97) and photoelectric sensor (98). There is a second pressure sensor (91), a third electric push rod (93) is provided at the bottom of the first limit plate (53) on the side close to the second distance sensor (81), and the third electric push rod (93) is telescopic A slide bar (94) is provided on one side of the rod, and a second fixed slide rail (95) is provided on the top of the first clamping plate (71) on the side close to the third electric push rod (93). The second fixed slide rail (95) ) a slider (96) is slidably connected to the top of the slider (96), a blower (97) is arranged on the top of the slider (96) for cleaning dust on the LCD screen, and a photoelectric sensor (98) is arranged on one side of the inner wall of the second fixed slide rail (95). ). 7. A calibration fixing device for a liquid crystal display screen according to claim 6, characterized in that it further comprises an adjustment mechanism (10), and the adjustment mechanism (10) comprises a second fixing plate (101), a screw (101) 102), a turntable (103) and a fixing pipe (104), a second fixing plate (101) is connected to one side of the support frame (2), and a screw rod (102) is threadedly connected to the second fixing plate (101). The bottom of the rod (102) is provided with a turntable (103), and the top of the screw rod (102) is rotatably connected with a fixed tube (104). 8. A calibration fixing device for a liquid crystal display screen according to claim 7, characterized in that it further comprises a control box (31), a control box (31) is provided on one side of the fixing frame (3), and the control box ( 31) A switching power supply, a control module and a power supply module are installed inside. The switching power supply supplies power to the whole device. The output end of the switching power supply is electrically connected to the power supply module. Through electrical connection, the control module is connected with DS1302 clock circuit and 24C02 circuit, first distance sensor (51), second distance sensor (81), first pressure sensor (61), second pressure sensor (91) and photoelectric The sensor (98) is electrically connected with the control module, and the first electric push rod (52), the second electric push rod (82), the third electric push rod (93) and the deceleration motor (63) pass through the peripheral circuit and the control module connect.

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