A test device for LCD display production

Abstract

The invention discloses a testing device for producing LCD liquid crystal display screens, which comprises a box body, wherein a first cylinder is arranged inside the box body, a first output shaft is passed through the top of the first cylinder, a support plate is welded on the top of the first output shaft, a first motor sleeve is welded on one side above the support plate, a support column is welded on the other side above the support plate, the support column is composed of a large cylinder at the bottom and a small cylinder at the top, a first reduction motor is fixedly installed inside the first motor sleeve, the first reduction motor is composed of a motor body and an output shaft, the small cylinder at the top of the support column and the output shaft of the first reduction motor are equal in diameter and height, and the top ends are on the same plane, the output shaft of the first reduction motor and the small cylinder at the top of the support column are both sleeved with a gear rod, and the device solves the problem of low strength detection efficiency in the current production of LCD liquid crystal display screens.

Description

Technical Field

[0001] The invention belongs to the technical field of LCD liquid crystal display screen production, and in particular relates to a testing device for LCD liquid crystal display screen production. Background Art

[0002] The LCD screen is composed of two glass plates separated by liquid crystal material. The liquid crystal material itself does not emit light, so there are lamps on both sides of the screen as light sources, and there is a backlight and reflective film on the back of the LCD screen. The backlight is composed of fluorescent materials that can emit light. Its main function is to provide a uniform background light source. The light emitted by the backlight enters the liquid crystal layer after passing through the first polarization filter layer. The droplets in the liquid crystal layer are contained in a tiny cell structure. One or more cells constitute a pixel on the screen. Between the glass plate and the liquid crystal material is a transparent electrode, which is divided into rows and columns. At the intersection of the row and the column, the optical rotation state of the liquid crystal is changed by changing the voltage. The role of the liquid crystal material is similar to that of a small light valve. When the electrode in the LCD generates an electric field, the liquid crystal molecules will be distorted, thereby regularly refracting the light passing through it, and then being filtered by the second filter layer and displayed on the screen.

[0003] During the production process of LCD screens, the screens need to be fully inspected, including strength testing, before they can be installed on the housing for assembly. The traditional method is manual inspection, which involves placing the LCD screen to be inspected under a pressing device, and then manually taking out the screen after the pressing device performs a pressing operation. The workload of the workers is large, resulting in low inspection efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a test device for LCD display screen production in order to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a test device for LCD liquid crystal display screen production, comprising a box body, a first cylinder is arranged inside the box body, a first output shaft is passed through the top of the first cylinder, a support plate is welded to the top of the first output shaft, a first motor sleeve is welded to one side above the support plate, a support column is welded to the other side above the support plate, the support column is composed of a large cylinder at the bottom and a small cylinder at the top, a first reduction motor is fixedly installed inside the first motor sleeve, the first reduction motor is composed of a motor body and an output shaft, the small cylinder at the top of the support column and the output shaft of the first reduction motor are equal in diameter and height, and the top ends are on the same plane, the output shaft of the first reduction motor and the small cylinder at the top of the support column The columns are all sleeved with gear rods, which are composed of a straight rod and a half gear at one end, and the two half gears are respectively meshed with each other with the support column and the first reduction motor as fixed centers, and the movable end of each gear rod is hinged with a transmission rod, and a placement plate is arranged above the two transmission rods, and two horizontal sliding grooves are provided on the placement plate, and the sliding groove is a groove-shaped through-hole structure with a groove-shaped countersunk head on the upper part, and sliding parts are arranged in the two sliding grooves, and the sliding parts are a combination of a cylinder with a large head diameter and a cylinder with a small lower diameter, and the sliding part is adapted to the sliding groove, that is, the head of the sliding part is stuck in the groove-shaped countersunk head of the sliding groove, and the lower part of the sliding part passes through the groove-shaped through-hole of the sliding groove, and the lower end of the sliding part passes through the transmission rod and is glued with a round cover.

[0006] The present invention further illustrates that a fixing plate is welded to one side of the box body, a second motor sleeve is welded to the top of the fixing plate, a second reduction motor is fixedly installed inside the second motor sleeve, the output end of the second reduction motor passes through the box body and is connected to a coupling, the other end of the coupling is connected to a bidirectional screw, the threads at both ends of the bidirectional screw have opposite rotation directions and equal lengths, one end of the bidirectional screw is threadedly connected to a first bracket, a front clamp is welded to the top of the first bracket, the other end of the bidirectional screw is threadedly connected to a second bracket, a connecting plate is welded to one side of the second bracket, a semicircular avoidance hole is opened in the middle position of one side of the connecting plate for avoiding the position of the first output shaft, two rear clamps are respectively welded to the two ends on the same side of the avoidance hole on the connecting plate, and the front clamp and the rear clamp are both "L" shaped.

[0007] The present invention further describes that auxiliary support plates 1 are provided on both sides of the first bracket and the first output shaft, and the auxiliary support plates 1 are welded on the inner side of the box body, and two rollers are fixedly installed on both sides of the front clamp and the rear clamp, and the rollers roll on the auxiliary support plates 1.

[0008] The present invention further illustrates that four telescopic rods are fixedly installed at the four corners inside the box body, the top ends of the four telescopic rods are fixedly connected to the upper cover and are located at the four corners inside it, a second cylinder is arranged above the upper cover, and a detection plate is fixedly installed at the output end of the second cylinder.

[0009] The present invention further illustrates that two auxiliary support plates are welded on the left and right sides of the inside of the box body, respectively, and a clamp block is arranged above each of the two auxiliary support plates. The clamp block has a structure in which an upper inclined surface is connected to a lower straight arm, and the top of the clamp block is in the same plane as the top of the box body. The maximum distance between the relative inclined surfaces of the two clamp blocks is greater than the length of the display screen, and the length of the display screen is greater than the minimum distance between the relative inclined surfaces of the two clamp blocks. A spring is welded on one side of the clamp block, and the other end of the spring is welded to the inner side of the box body.

[0010] The present invention further describes that a shaft bracket is sleeved on the middle portion of the bidirectional screw, and one side of the shaft bracket is welded inside the box.

[0011] The present invention further describes that the inner sides of the front clamp, the rear clamp and the clamp block are all glued with the buffer cotton, and the upper sides of the placement plate and the second auxiliary support plate are also glued with the buffer cotton.

[0012] The present invention further describes that the horizontal planes of the front clamping member and the rear clamping member are in the same plane as the horizontal plane of the second auxiliary support plate.

[0013] The present invention further describes that an operation screen is fixedly installed above the fixing plate.

[0014] The present invention further illustrates that a control system is provided inside the operating screen, and the first cylinder, the first reduction motor, the telescopic rod, the second reduction motor and the second cylinder are all electrically connected to the control system.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0016] (1) The first cylinder and the first reduction motor are provided as power sources, and the horizontal movement of the placement plate is realized by the articulated transmission of the gear rod and the transmission rod. During the inspection, the LCD display screen to be inspected is placed on the placement plate, and the placement plate is retracted into the interior of the box through the transmission of the gear rod and the transmission shaft, and is carried downward by the first cylinder. After the inspection is completed, it is extended out of the box again, replacing the manual placement of the LCD display screen to be inspected to the inspection position by the workers, which is beneficial to reducing the workload of manual operation and improving work efficiency.

[0017] (2) The second reduction motor is provided as a power source, and the second reduction motor drives the bidirectional screw to rotate through the coupling. Since the bidirectional screw is threadedly connected with the first bracket and the second bracket, the first bracket drives the front clamp to move while the bidirectional screw rotates, and the second bracket drives the rear clamp to move through the connecting plate. This is beneficial for the support plate to clamp the LCD display screen to be inspected front and back after the support plate supports the LCD display screen to be inspected into the box body, which is beneficial for assisting the completion of the inspection of the LCD display screen and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 is a schematic diagram of the internal structure of a box body according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 3 is a side cross-sectional view of an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a first cylinder transmission structure of an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the motor transmission structure of an embodiment of the present invention;

[0024] Figure 6 is a side view of the motor transmission structure of an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of sliding fit on a placement plate according to an embodiment of the present invention;

[0026] In the figure: 1, box body; 2, first cylinder; 3, first output shaft; 4, support plate; 41, first motor sleeve; 5, support column; 6, first reduction motor; 7, gear rod; 8, half gear; 9, transmission rod; 10, sliding member; 101, round cover; 11, placement plate; 111, sliding groove; 12, buffer cotton; 13, fixing plate; 131, second motor sleeve; 14, operation screen; 15, second reduction motor; 16, coupling; 17, bidirectional screw; 171, first bracket; 172, second bracket; 173, connecting plate; 174, shaft bracket; 18, front clamp; 19, rear clamp; 20, roller; 201, auxiliary support plate 1; 21, telescopic rod; 22, upper cover; 23, second cylinder; 24, detection plate; 25, spring; 26, auxiliary support plate 2; 27, clamping block. DETAILED DESCRIPTION

[0027] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The embodiment of the present invention provides a test device for LCD liquid crystal display production. Figure 1 Schematic diagram of the internal structure of the box body of this embodiment. Figure 1 and Figure 4 As shown, the test device for producing LCD liquid crystal display screens comprises a box body 1, a first cylinder 2 is arranged inside the box body 1, a first output shaft 3 is passed through the top of the first cylinder 2, a support plate 4 is welded to the top of the first output shaft 3, a first motor sleeve 41 is welded to one side above the support plate 4, a support column 5 is welded to the other side above the support plate 4, the support column 5 is composed of a large cylinder at the bottom and a small cylinder at the top, a first reduction motor 6 is fixedly installed inside the first motor sleeve 41, and the first reduction motor 6 consists of a motor main The small cylinder on the top of the support column 5 and the output shaft of the first reduction motor 6 are equal in diameter and height, and the top ends are on the same plane. The output shaft of the first reduction motor 6 and the small cylinder on the top of the support column 5 are both sleeved with a gear rod 7, and the gear rod 7 is composed of a straight rod and a half gear 8 at one end. The two half gears 8 are respectively meshed with each other with the support column 5 and the first reduction motor 6 as fixed centers. The movable end of each gear rod 7 is hinged with a transmission rod 9, and a placement plate 11 is arranged above the two transmission rods 9.

[0029] like Figure 4 and Figure 7As shown, two horizontal sliding grooves 111 are provided on the placement plate 11, and the sliding groove 111 is a groove-shaped through-hole structure with a groove-shaped countersunk head on the upper part, and sliding members 10 are arranged in the two sliding grooves 111, and the sliding member 10 is a combination of a cylinder with a large head diameter and a cylindrical structure with a small lower diameter, and the sliding member 10 is adapted to the sliding groove 111, that is, the head of the sliding member 10 is clamped on the groove-shaped countersunk head of the sliding groove 111, and the lower part of the sliding member 10 passes through the groove-shaped through-hole of the sliding groove 111, and the lower end of the sliding member 10 passes through the transmission rod 9 and is glued with a round cover 101, and the cooperation between the sliding member 10 and the sliding groove 111 is conducive to connecting the placement plate 11 with the transmission rod 9, and realizing its own sliding operation with the movement of the transmission rod 9.

[0030] The above structure uses the first reduction motor 6 as a power source. The start-up of the first reduction motor 6 will drive the two half gears 8 to mesh with each other, so that the movable end of the gear rod 7 rotates with the support column 5 and the first reduction motor 6 as the center. Because the movable end of the gear rod 7 is hinged to the transmission rod 9, the other end of the transmission rod 9 is connected to the sliding groove 111 through the sliding member 10, that is, when the gear rod 7 drives the other end of the transmission rod 9 to generate a force in an inclined direction, the force is decomposed by sliding the sliding member 10 left and right in the horizontal sliding groove 111, so that the placement plate 11 can only move in the front and rear directions as the transmission rod 9 is pulled. During the inspection process, the worker places the LCD display screen to be inspected on the placement plate 11, and the first reduction motor 6 rotates forward to drive the two half gears 8 to mesh with each other, so that the movable end of the gear rod 7 retracts the placement plate 11 inward through the transmission rod 9. After the detection work is completed, the placement plate 11 is extended out of the box body 1 again through the reversal of the first reduction motor 6 and the transmission of the gear rod 7 through the transmission rod 9. Mechanical transmission replaces the manual placement of the LCD display screen to be detected to the detection position by workers, which is conducive to reducing the amount of manual operation tasks and improving work efficiency.

[0031] In certain preferred embodiments, Figure 1 and Figure 5As shown, a fixing plate 13 is welded to one side of the box body 1, a second motor sleeve 131 is welded to the top of the fixing plate 13, a second reduction motor 15 is fixedly installed inside the second motor sleeve 131, an output end of the second reduction motor 15 passes through the box body 1 and is connected to a coupling 16, the other end of the coupling 16 is connected to a bidirectional screw 17, the threads at both ends of the bidirectional screw 17 have opposite rotation directions and equal lengths, one end of the bidirectional screw 17 is threadedly connected to a first bracket 171, the top of the first bracket 171 A front clamp 18 is welded thereto, and the other end of the bidirectional screw 17 is threadedly connected to a second bracket 172, a connecting plate 173 is welded to one side of the second bracket 172, a semicircular avoidance hole is opened in the middle position of one side of the connecting plate 173 for avoiding the position of the first output shaft 3, and two rear clamps 19 are welded to the two ends on the same side of the avoidance hole on the connecting plate 173, respectively, and the front clamp 18 and the rear clamp 19 are both "L"-shaped, and the two sides of the "L" shape are respectively used to support the bottom of the display screen and clamp the side of the display screen.

[0032] like Figure 5 As shown, auxiliary support plates 201 are provided on both sides of the first bracket 171 and the first output shaft 3, and the auxiliary support plates 201 are welded to the inner side of the box body 1, and two rollers 20 are fixedly installed on both sides of the front clamp 18 and the rear clamp 19, and the rollers 20 roll on the auxiliary support plates 201.

[0033] The above structure uses the second reduction motor 15 as a power source, and the second reduction motor 15 drives the bidirectional screw 17 to rotate through the coupling 16. Since the bidirectional screw 17 is threadedly connected with the first bracket 171 and the second bracket 172, the first bracket 171 drives the front clamp 18 to move while the bidirectional screw 17 rotates, and the second bracket 172 drives the rear clamp 19 to move through the connecting plate 173. At the same time, the rollers 20 fixedly installed on both sides of the front clamp 18 and the rear clamp 19 roll on the auxiliary support plate 201, which is beneficial to assist the movement of the front clamp 18 and the rear clamp 19, and is used for the placement plate 11 to clamp the front and rear sides of the LCD display screen to be detected after the LCD display screen to be detected is placed into the box body 1.

[0034] In certain preferred embodiments, Figure 2As shown, four telescopic rods 21 are fixedly installed at the four corners inside the box body 1, and the top ends of the four telescopic rods 21 are fixedly connected to the upper cover 22 and are located at the four corners inside it. A second cylinder 23 is arranged above the upper cover 22, and a detection plate 24 is fixedly installed at the output end of the second cylinder 23. The telescopic rods 21 are conducive to driving the upper cover 22 to be lifted and lowered, so that the device can be opened when placing and removing the LCD display screen to be detected, and closed when detecting the display screen, so as to avoid injuries to the staff due to the breakage of the display screen glass quality problem during the detection process.

[0035] In certain preferred embodiments, Figure 1 As shown, auxiliary auxiliary support plates 26 are welded to the left and right sides of the interior of the box body 1, and a clamping block 27 is arranged above each of the auxiliary auxiliary support plates 26. The clamping block 27 has a structure in which an upper inclined surface is connected to a lower straight arm. The top of the clamping block 27 is in the same plane as the top of the box body 1. The maximum distance between the relative inclined surfaces of the two clamping blocks 27 is greater than the length of the display screen, and the length of the display screen is greater than the minimum distance between the relative inclined surfaces of the two clamping blocks 27, so as to ensure that the clamping block 27 can successfully clamp the display screen. A spring 25 is welded to one side of the clamping block 27, and the other end of the spring 25 is welded to the inner side of the box body 1.

[0036] The above structure is conducive to driving the display screen to move into the cavity through the placement plate 11 before the detection work. When the display screen moves downward to contact the inclined surface of the clamp block 27, the display screen is subjected to the downward pressure of the detection plate 24, and the chamfered inclined surface causes the spring 25 to be compressed, and the two clamp blocks 27 move outward until the display screen is clamped by the straight arms of the clamp blocks 27, so as to achieve the positioning of the left and right sides of the display screen. After the detection is completed, the placement plate 11 drags the display screen to move upward. When the display screen is separated from the straight arms of the clamp block 27, the spring 25 extends, driving the clamp block 27 to move inward until the display screen is completely separated from the inclined surface of the clamp block 27, and the clamp block 27 returns to the initial position.

[0037] In certain preferred embodiments, Figure 6 As shown, a shaft bracket 174 is sleeved in the middle of the bidirectional screw 17 , and one side of the shaft bracket 174 is welded inside the box body 1 . The shaft bracket 174 is helpful for supporting and stabilizing the bidirectional screw 17 .

[0038] In some preferred embodiments, the inner sides of the front clamp 18, the rear clamp 19 and the clamping block 27 are all glued with the buffer cotton 12, which is used to play a buffering role and protect the display screen when clamping the display screen. The buffer cotton 12 is also glued on the top of the placement plate 11 and the auxiliary support plate 26 to protect the horizontal surface of the display screen and prevent the display screen from being scratched.

[0039] In certain preferred embodiments, Figure 2 As shown, an operation screen 14 is fixedly installed above the fixed plate 13, and the operation screen 14 is conducive to manually controlling the start or stop of work and displaying whether the detected LCD display screen is abnormal.

[0040] In some preferred embodiments, the horizontal planes of the front clamp 18 and the rear clamp 19 are in the same plane as the horizontal plane of the auxiliary support plate 26, which is beneficial for the display screen to be detected after it descends to the same horizontal plane, thereby improving the detection stability.

[0041] In some optional embodiments, such as Figure 2 As shown, the box body 1 and the upper cover 22 are adapted to each other, and when the upper surface of the box body 1 contacts the lower surface of the upper cover 22, the interior is separated from the exterior, which is beneficial to prevent splashing debris caused by the rupture of the LCD display screen due to uncertain factors from harming the staff during the detection process.

[0042] In the above embodiment, a control system is provided inside the operation screen 14, and the first cylinder 2, the first reduction motor 6, the telescopic rod 21, the second reduction motor 15 and the second cylinder 23 are all electrically connected to the control system.

[0043] In the above embodiment, in order to better operate the control device, the control system also includes the following operating steps: starting the device, placing the LCD display screen on the placement plate 11, the control system controls the first reduction motor 6 to rotate forward, driving the two half gears 8 to engage and rotate with each other, and the gear rod 7 pulls the transmission rod 9 to move, and the transmission rod 9 drives the placement plate 11 to be retracted into the box body 1, and then the control system controls the telescopic rod 21 to retract until the lower surface of the upper cover 22 contacts the upper surface of the box body 1, and then the control system controls the second cylinder 23 to drive the detection plate 24 to move downward and close to the LCD display screen through the output end, and then the control system The system controls the first cylinder 2 to drive the placement plate 11 to descend through a series of connecting parts, and the detection plate 24 cooperates with the placement plate 11 to clamp the display screen so that it passes through the inclined surface of the clamping block 27 until the placement plate 11 and the auxiliary support plate 26 move to the same plane. At this time, the two clamping blocks 27 clamp the left and right sides of the display screen and position it in the up and down directions. Then the control system controls the second reduction motor 15 to rotate forward. The second reduction motor 15 rotates forward through the rotation of the bidirectional screw 17 to drive the front clamp 18 and the rear clamp 19 to be relatively close until the display screen is clamped in the front and back directions to carry out the next step of detecting the LCD display screen.

[0044] After the detection is completed, the control system controls the second reduction motor 15 to reverse, and drives the front clamp 18 and the rear clamp 19 to move relatively away from their original positions through the rotation of the bidirectional screw 17. The output end of the second cylinder 23 drives the detection plate 24 to retract upward, and controls the first cylinder 2 to drive the placement plate 11 and the detection plate 24 to rise to the initial position at the same time through a series of connecting parts. Then, the control system controls the telescopic rod 21 to drive the upper cover 22 to rise to its original position. Finally, the control system controls the first reduction motor 6 to reverse, driving the two half gears 8 to engage and rotate with each other, and the gear rod 7 then pulls the transmission rod 9 to drive the placement plate 11 to extend out of the box 1, and waits for the staff to take away the display screen after the detection, so as to realize the device's detection work on the LCD display screen.

[0045] In some optional embodiments, the operation screen 14 is provided with start, stop and close options and an alarm prompt function, which is specifically embodied in that by clicking start, the device can automatically perform display screen detection according to the above process; by clicking stop, the device operation can be immediately interrupted to facilitate the situation where the device needs to be stopped immediately in response to an emergency; by clicking close, the placement plate 11 can be retracted and the upper cover 22 can be lowered to the closed state of the device after the operation is stopped, which is beneficial for better protection of the internal structure of the device when not in use and reducing the occupied space.

[0046] The working principle of the embodiment of the present invention is as follows: the LCD display screen to be detected is placed on the placement plate 11, the first reduction motor 6 rotates forward to drive the two half gears 8 to mesh, the movable end of the gear rod 7 rotates to drive the hinged transmission rod 9 to move, and the transmission rod 9 drives the placement plate 11 to be retracted into the box body 1, and then the control system controls the telescopic rod 21 to retract until the lower surface of the upper cover 22 contacts the upper surface of the box body 1, and the device is closed, and then the control system controls the output end of the second cylinder 23 to drive the detection plate 24 to move downward and close to the LCD display screen, and then controls the first cylinder 2 to drive the placement plate 11 to descend through a series of connecting parts, and at the same time, the detection plate 24 and the placement plate 11 are retracted. The plate 11 cooperates to clamp the display screen so that it passes through the inclined surface of the clamping block 27 until the placement plate 11 and the auxiliary support plate 26 are moved to the same plane. At this time, the two clamping blocks 27 clamp the left and right sides of the display screen. Then the control system controls the second reduction motor 15 to rotate forward. The second reduction motor 15 rotates forward through the rotation of the bidirectional screw 17 to drive the front clamp 18 and the rear clamp 19 to be relatively close until the display screen is clamped in the front and rear directions. Then the LCD display screen is inspected. After the inspection is completed, the mechanism in the device moves in the reverse direction to extend the display screen out of the box 1. The worker removes the inspected display screen to complete the automatic inspection of the LCD display screen.

[0047] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0048] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for LCD display screen production, comprising a box (1), characterized in that: A first cylinder (2) is arranged inside the housing (1), a first output shaft (3) is passed through the top of the first cylinder (2), a support plate (4) is welded to the top of the first output shaft (3), a first motor sleeve (41) is welded to one side of the top of the support plate (4), a support column (5) is welded to the other side of the top of the support plate (4), the support column (5) is composed of a large cylinder at the bottom and a small cylinder at the top, a first reduction motor (6) is fixedly installed inside the first motor sleeve (41), the first reduction motor (6) is composed of a motor body and an output shaft, the small cylinder at the top of the support column (5) and the output shaft of the first reduction motor (6) are equal in diameter and height, and the top ends are on the same plane, the output shaft of the first reduction motor (6) and the small cylinder at the top of the support column (5) are both sleeved with a gear rod (7), the gear rod (7) is composed of a straight rod and a half gear (8) at one end, the two half gears are connected to each other. The wheels (8) are meshed with each other with the support column (5) and the first reduction motor (6) as fixed centers, and the movable end of each gear rod (7) is hinged with a transmission rod (9). A placement plate (11) is arranged above the two transmission rods (9), and the placement plate (11) is provided with two horizontal sliding grooves (111). The sliding grooves (111) are groove-shaped through-hole structures with groove-shaped countersunk heads on the upper part, and sliding members are arranged in the two sliding grooves (111). (10), the sliding member (10) is a combination of a cylindrical structure with a large head diameter and a cylindrical structure with a small lower diameter, and the sliding member (10) is adapted to the sliding groove (111), that is, the head of the sliding member (10) is stuck in the groove-shaped countersunk head of the sliding groove (111), and the lower part of the sliding member (10) passes through the groove-shaped through hole of the sliding groove (111), and the lower end of the sliding member (10) passes through the transmission rod (9) and is glued with a round cover (101); A bidirectional screw (17) is further provided inside the box body (1), one end of the bidirectional screw (17) is threadedly connected to a first bracket (171), a front clamp (18) is welded above the first bracket (171), and the other end of the bidirectional screw (17) is threadedly connected to a second bracket (172); Four telescopic rods (21) are fixedly mounted at the four corners of the box body (1), the top ends of the four telescopic rods (21) are fixedly connected to the upper cover (22) and are located at the four corners of the box body (1), a second cylinder (23) is arranged above the upper cover (22), and a detection plate (24) is fixedly mounted at the output end of the second cylinder (23).

2. A test device for LCD display production according to claim 1, characterized in that: The threads at both ends of the bidirectional screw (17) are in opposite directions and have equal lengths. A fixing plate (13) is welded to one side of the housing (1). A second motor sleeve (131) is welded above the fixing plate (13). A second reduction motor (15) is fixedly installed inside the second motor sleeve (131). The output end of the second reduction motor (15) passes through the housing (1) and is connected to a coupling (16). The other end of the coupling (16) is connected to the bidirectional screw (17). A connecting plate (173) is welded to one side of the second bracket (172). A semicircular avoidance hole is opened in the middle of one side of the connecting plate (173) for avoiding the position of the first output shaft (3). Two rear clamps (19) are respectively welded to the two ends of the same side of the avoidance hole on the connecting plate (173). Both the front clamp (18) and the rear clamp (19) are "L"-shaped.

3. A test device for LCD display production according to claim 2, characterized in that: Auxiliary support plates (201) are provided on both sides of the first bracket (171) and the first output shaft (3), and the auxiliary support plates (201) are welded to the inner side of the box body (1). Two rollers (20) are fixedly mounted on both sides of the front clamp (18) and the rear clamp (19), and the rollers (20) roll on the auxiliary support plates (201).

4. A test device for LCD display production according to claim 3, characterized in that: Two auxiliary support plates (26) are welded to the left and right sides of the interior of the box (1), and a clamping block (27) is arranged above each of the two auxiliary support plates (26). The clamping block (27) is a structure in which an upper inclined surface is connected to a lower straight arm. The top of the clamping block (27) is in the same plane as the top of the box (1). The maximum distance between the relative inclined surfaces of the two clamping blocks (27) is greater than the length of the display screen, and the length of the display screen is greater than the minimum distance between the relative inclined surfaces of the two clamping blocks (27). A spring (25) is welded to one side of the clamping block (27), and the other end of the spring (25) is welded to the inner side of the box (1).

5. A test device for LCD display production according to claim 4, characterized in that: A shaft support (174) is sleeved in the middle of the bidirectional screw (17), and one side of the shaft support (174) is welded inside the box (1).

6. A test device for LCD display production according to claim 5, characterized in that: The inner sides of the front clamp (18), the rear clamp (19) and the clamp block (27) are all glued with cushioning cotton (12), and the upper sides of the placement plate (11) and the second auxiliary support plate (26) are also glued with the cushioning cotton (12).

7. A test device for LCD display production according to claim 6, characterized in that: The horizontal planes of the front clamping piece (18) and the rear clamping piece (19) are in the same plane as the horizontal plane of the second auxiliary support plate (26).

8. The LCD display production test device according to claim 7, characterized in that: An operating screen (14) is fixedly mounted above the fixing plate (13).

9. A test device for LCD display production according to claim 8, characterized in that: A control system is provided inside the operating screen (14), and the first cylinder (2), the first reduction motor (6), the telescopic rod (21), the second reduction motor (15) and the second cylinder (23) are all electrically connected to the control system.

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