A liquid crystal display AOI online imaging recognition device

Abstract

The present invention relates to the technical field of display screen recognition, and specifically to an AOI online imaging recognition device for a liquid crystal display screen, comprising a device body, a storage platform, a conveyor belt, a mounting plate, an electric push rod, a fixing sleeve, a fixing mechanism, an adjusting mechanism, and a baffle. The storage platform is installed inside the device body, the conveyor belt is located at the front side of the storage platform, the mounting plate is initially located at the left side of the conveyor belt, the electric push rod is installed above the conveyor belt, the fixing sleeve is located above the conveyor belt, the fixing mechanism is located at the conveyor belt, the adjusting mechanism is located on the fixing sleeve, and the baffle is installed at the front side of the fixing sleeve. Through the automatic timed conveyance of the conveyor belt, a display screen to be detected can automatically enter the interior of the device, and at the same time, the one-way movement of the ratchet and the power transmission of the crank connecting rod are used to realize the shielding of dust before imaging recognition, thereby improving the online imaging recognition accuracy of the display screen AOI.

Description

Technical Field

[0001] The invention relates to the technical field of display screen recognition, in particular to an AOI online imaging recognition device for a liquid crystal display screen. Background Art

[0002] The LCD AOI online imaging recognition equipment is an automatic optical inspection equipment specially used in the production process of LCD screens. It captures the image of the LCD screen and uses image processing and analysis technology to automatically identify and classify the defects of the screen, thereby achieving efficient and accurate quality inspection.

[0003] During the process of acquiring images from the LCD screen, the LCD screen will be fixed and then driven into the detection device. Through the photodiode device and the imaging system that matches it, light will be irradiated onto the surface of the LCD screen. The device then receives the light reflected by the LCD screen being detected and converts it into charge signals. These charge signals are converted into digital grayscale values ​​to ultimately form image data. During the process of light irradiation and reflection, dust or impurities will affect the propagation and reception of light at the LCD screen; during the process of AOI online imaging recognition, a certain amount of heat will be generated inside it, so the LCD screen to be tested cannot be tested in a wrapped state, otherwise it will cause the temperature of the equipment and the screen to rise, thereby affecting the display effect and stability of the screen, so most of the existing technologies are carried out in a dust-free workshop; however, on the one hand, the construction of a dust-free workshop is difficult, and it is difficult to maintain the absolute dust-freeness of the dust-free workshop in daily life when people enter and exit. At this time, dust in the air will inevitably enter the detection equipment with the LCD screen to be tested, thereby affecting the transmission and reflection of the detection light; on the other hand, it is difficult to equip many factories or operation areas with dust-free workshops, and manual operations will constantly contact the screen, and the installation process will carry dust or fingerprints to the surface of the screen, thereby affecting the accuracy of the AOI online imaging recognition of the screen;

[0004] Based on this, in order to solve the problem that the dust brought by manual operation and installation and the dust brought by the environment itself are large, and thus it is difficult to ensure the accuracy of display screen AOI online imaging recognition, the present invention designs a liquid crystal display screen AOI online imaging recognition device. Summary of the invention

[0005] The present invention provides an AOI online imaging recognition device for a liquid crystal display screen, which solves the problem that the dust carried by manual operation and installation and the dust brought by the environment in which the device is located are large, making it difficult to ensure the accuracy of AOI online imaging recognition of the display screen; through the automatic timed transportation of the conveyor belt, the display screen to be inspected can automatically enter the interior of the device, and at the same time, the unidirectional movement of the ratchet and the power transmission of the crank connecting rod are used to achieve dust shielding before imaging recognition, thereby improving the AOI online imaging recognition accuracy of the display screen.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides an AOI online imaging recognition device for a liquid crystal display screen, comprising a device body, a storage platform, a conveyor belt, a mounting plate, an electric push rod, a fixing sleeve, a fixing mechanism, an adjusting mechanism, and a baffle, wherein the storage platform is installed inside the device body, the conveyor belt is located at the front side of the storage platform, a display screen to be detected is placed on the mounting plate, the mounting plate is initially located at the left side of the conveyor belt, the electric push rod is installed above the conveyor belt, the fixing sleeve is located above the conveyor belt and at the output end of the electric push rod, a supplementary unit is provided at the fixing sleeve, the fixing mechanism is located at the storage platform, the adjusting mechanism is located on the fixing sleeve, the baffle is installed at the front side of the storage platform, the conveyor belt conveys the mounting plate into the fixing sleeve, the electric push rod pushes the fixing sleeve to the storage platform, the fixing mechanism is driven by the electric push rod to fix the fixing sleeve to the mounting plate, and the baffle drives the adjusting mechanism through the fixing mechanism to automatically shield dust at the entrance of the storage platform.

[0008] Preferably, the supplementary unit includes a compression spring, a support plate and a limit bracket, one end of the compression spring is installed on the equipment body, the support plate is located at the other end of the compression spring, the limit bracket is installed on the right side of the conveyor belt, and several fixing sleeves are placed between the limit bracket and the support plate. A laser sensor is installed on the limit bracket, and the laser sensor is connected to the electric push rod electrical signal.

[0009] Preferably, the mounting plate is divided into a connecting portion and a placing portion, the connecting portion is provided with a plurality of connecting holes, a fixing ring is installed on the fixing sleeve, a latch is installed on the fixing sleeve when the fixing sleeve is not in contact with the mounting plate, and a fixing groove is provided on the fixing ring; a reset spring is installed between the latch and the fixing sleeve.

[0010] Preferably, the fixing mechanism comprises a positioning column and a pressure plate, wherein the positioning column is installed on a side of the storage platform, and the pressure plate is located above the storage platform, and the shape of the side cross-section of the pressure plate is a trapezoid.

[0011] Preferably, a rounded corner is provided at the front end edge of the positioning column.

[0012] Preferably, the adjusting mechanism includes a push block, a rack, a ratchet, a connecting rod, a support plate, a limit spring and a torsion spring, the push block is installed on the positioning column, the rack is installed on the end of the push block away from the positioning column, the ratchet is installed on the equipment body, the ratchet is unidirectionally meshed with the rack, the ratchet includes a wheel body, ratchet teeth and a bending spring, the wheel body and the ratchet teeth are hinged on one side, the bending spring is located between the wheel body and the free end of the ratchet teeth, the connecting rod is installed on the wheel body, the other end of the connecting rod is installed with a support plate, the limit spring is installed between the push block and the positioning column, and the torsion spring is installed between the push block and the rack.

[0013] Preferably, the length of the baffle in the front-to-back direction is equal to the distance between the storage platform and the top, and the thickness of the baffle gradually decreases from the center to both sides.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention proposes an AOI online imaging recognition device for a liquid crystal display screen, which cooperates with a fixing mechanism and an adjusting mechanism to keep the display screen stable during the imaging recognition process, reduce the interference of external dust on the imaging recognition process, and avoid the problem of unclear imaging due to external light interference or shaking of the display screen, thereby improving the efficiency of display screen imaging recognition.

[0016] 2. The present invention proposes an AOI online imaging recognition device for a liquid crystal display screen. When passing through a positioning column, if the fixing sleeve is not tilted at this time, it will move directly forward along the edge of the positioning column and then move inward. If the fixing sleeve is tilted at this time, the rounded corners of the positioning column will gradually correct the fixing sleeve, and then keep the fixing sleeve in a straight line direction to enter, thereby avoiding the fixing sleeve from tilting and entering, causing the mounting plate and the display screen to be detected to tilt and enter, thereby affecting the effect of display screen imaging recognition; after entering the positioning column, the upper fixing ring will contact the top pressure plate at this time, and as it goes deeper inward, the pressure plate gradually increases the extrusion force on the fixing ring, thereby pushing the pressure plate to move downward, and when the pressure plate moves downward, it will push the pin to move sideways, thereby squeezing the reset spring, and the fixing ring moves downward, thereby making the mounting plate fixed by the fixed shaft on the fixing ring, and then the pin enters the fixing groove, thereby keeping the fixing ring, the fixing sleeve and the mounting plate fixed, and then the mounting plate will only move deeper along the straight line at this time, thereby improving the position fixation of the display screen to be detected, reducing shaking during imaging recognition, and improving the accuracy of imaging recognition.

[0017] 3. The present invention proposes an AOI online imaging recognition device for a liquid crystal display screen. In the process of the fixed sleeve moving inward, the push block will push the push block, and the push block will drive the baffle to fold through the structure of the rack and the ratchet. After the baffle is folded, it can just cover the inside of the device body, on the one hand to reduce the entry of dust into the interior, and on the other hand to prevent external light from entering the interior and affecting the light detected internally, thereby improving the accuracy of display screen imaging recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation mode of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation mode or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are one implementation mode of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of a supplementary unit of the present invention;

[0021] Figure 3 It is a schematic diagram of the fixing mechanism and the adjusting mechanism of the present invention;

[0022] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0023] Figure 5 It is a schematic diagram of the mounting plate of the present invention;

[0024] Figure 6 It is a schematic diagram of the present invention removing the conveyor belt;

[0025] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0026] Figure 8 It is a schematic diagram of the support plate of the present invention.

[0027] In the figure: P, display screen to be tested; 1, equipment body; 2, storage platform; 3, conveyor belt; 4, mounting plate; 41, connecting part; 411, connecting hole; 42, placement part; 5, electric push rod; 6, fixing sleeve; 61, supplementary unit; 611, compression spring; 612, support plate; 613, limit bracket; 614, laser sensor; 62, fixing ring; 621, fixing groove; 63, latch; 64, reset spring; 7, fixing mechanism; 71, positioning column; 711, fillet; 72, pressure plate; 8, adjustment mechanism; 81, push block; 82, rack; 83, ratchet; 831, wheel body; 832, ratchet; 833, bending spring; 84, connecting rod; 85, support plate; 86, limit spring; 87, torsion spring; 9, baffle. DETAILED DESCRIPTION

[0028] In order to better understand the above solution, the above technical solution is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figure 1 As shown, the present invention provides an AOI online imaging recognition device for a liquid crystal display screen, comprising a device body 1, a storage platform 2, a conveyor belt 3, a mounting plate 4, an electric push rod 5, a fixing sleeve 6, a fixing mechanism 7, an adjustment mechanism 8, and a baffle 9. The storage platform 2 is installed inside the device body 1, and a light output and light receiving probe is installed above the storage platform 2, which is used to perform online imaging recognition on the liquid crystal display screen on the storage platform 2. The conveyor belt 3 is located at the front side of the storage platform 2, and the conveyor belt 3 is driven by a motor. The rightmost end of the conveyor belt 3 does not exceed the leftmost end of the storage platform 2, thereby ensuring that the conveyor belt 3 does not interfere with the normal transmission of the storage platform 2. A display screen to be detected is placed on the mounting plate 4, and the initial position of the mounting plate 4 is located on the left side of the conveyor belt 3. A plurality of display screens to be detected are initially placed on the mounting plate 4. The mounting plate 4 can be used as a protective cover for the display screen, thereby protecting the edge position of the display screen to avoid damage to the edge during transportation, contact, etc., thereby causing obstacles to the display of the display screen;

[0030] The mounting plate 4 can be set so that when it reaches the inside of the fixing sleeve 6, its left edge exceeds the left edge of the fixing sleeve 6. Then, when the conveyor belt 3 is transporting, when the mounting plate 4 is just located inside the fixing sleeve 6, the conveyor belt 3 just separates from the mounting plate 4, thereby preventing the mounting plate 4 from being unable to enter the inside of the fixing sleeve 6.

[0031] The electric push rod 5 is installed above the conveyor belt 3. The electric push rod 5 is used to push the display screen to be detected onto the storage platform 2 and then be used for detection. The fixed sleeve 6 is located above the conveyor belt 3 and at the output end of the electric push rod 5. The fixed sleeve 6 is large in size, which can facilitate the use of display screens of different lengths, thereby improving the diversity of equipment detection; a supplementary unit 61 is provided at the fixed sleeve 6, the fixing mechanism 7 is located at the conveyor belt 3, the adjusting mechanism 8 is located at the storage platform 2, and the baffle 9 is installed on the front side of the storage platform 2. On the one hand, the baffle 9 serves as a bridge before the display screen to be detected enters the storage platform 2 for detection. On the other hand, under the action of the adjusting mechanism 8, it can block dust after the display screen to be detected enters, so as to avoid dust affecting the light irradiation and the normal imaging of the display screen during the imaging recognition process.

[0032] The conveyor belt 3 conveys the mounting plate 4 into the fixing sleeve 6, the electric push rod 5 pushes the fixing sleeve 6 to the storage platform 2, the fixing mechanism 7 is driven by the electric push rod 5 to fix the fixing sleeve 6 and the mounting plate 4, and the baffle 9 drives the adjusting mechanism 8 through the fixing mechanism 7 to automatically block the dust at the entrance of the storage platform 2.

[0033] First, the display screen is placed in the mounting plate 4. The mounting plate 4 is annular. On the one hand, it is to protect the edge of the display screen. On the other hand, it cooperates with the fixing mechanism 7 to fix and position the display screen to be imaged and identified, so as to avoid the problem of poor imaging effect caused by shaking or tilting of the display screen. Then, under the action of the conveyor belt 3, the mounting plate 4 gradually brings the display screen to be detected to the front end of the storage platform 2, and then enters the fixing sleeve 6. Under the action of the electric push rod 5, the fixing sleeve 6 brings the mounting plate 4 and moves toward the storage platform 2 through the baffle 9. During the movement, it will pass through the fixing mechanism 7. Under the action of the fixing mechanism 7, the fixing sleeve 6 will be gradually fixed to the mounting plate 4, thereby limiting the positive direction of the mounting plate 4. When the display screen reaches the storage platform 2, the display screen also reaches the storage platform 2 in the forward direction at this time, thereby improving the position accuracy and stability of the display screen imaging recognition. In this process, the adjusting mechanism 8 will also be driven to gradually flip the baffle 9 to gradually block the display screen to be imaged and recognized. On the one hand, it blocks the dust outside, and on the other hand, it also reduces the influence of external light on the internal imaging recognition. Through the cooperation of the fixing mechanism 7 and the adjusting mechanism 8, the display screen remains stable during the imaging recognition process, and the interference of external dust on the imaging recognition process is reduced, while avoiding the problem of unclear imaging due to external light interference or shaking of the display screen, thereby improving the efficiency of display screen imaging recognition.

[0034] like Figure 2 , 3As shown in , 4, the supplementary unit 61 includes a compression spring 611, a support plate 612 and a limit bracket 613. One end of the compression spring 611 is installed on the equipment body 1. A groove is opened on the equipment body 1. The compression spring 611 is located at the bottom of the groove. The support plate 612 is located at the other end of the compression spring 611. The support plate 612 is located in the groove. The limit bracket 613 is installed on the right side of the conveyor belt 3. A plurality of fixing sleeves 6 are placed between the limit bracket 613 and the support plate 612. A laser sensor 614 is installed on the limit bracket 613. The laser sensor 614 is connected to the electric push rod 5 by electrical signals.

[0035] Several fixing sleeves 6 are first placed here on the right side of the conveyor belt 3. In the initial state, the supporting force of the compression spring 611 is used to press against the supporting plate 612, so that the supporting plate 612 and the top of the limiting bracket 613 maintain a certain clamping force. At this time, after the electric push rod 5 pushes away a fixing sleeve 6, the support plate 612 will move upward under the influence of the spring elastic force, and then drive the second fixing sleeve 6 to the position of the first fixing sleeve 6, thereby realizing the replenishment of the fixing sleeve 6. The top of the limiting bracket 613 is a rotating connection. After a batch of fixing sleeves 6 are used up, by rotating the top of the limiting bracket 613, several fixing sleeves 6 are placed on the supporting plate 612, thereby squeezing the compression spring 611, and then rotating the limiting bracket 613 to form a supplement to the fixing sleeve 6.

[0036] The laser sensor 614 is used to sense the position of the mounting plate 4 in the fixed sleeve 6. The laser sensor 614 here can be a distance sensor. When the mounting plate 4 enters along the hole on the left side of the fixed sleeve 6, the distance between the mounting plate 4 and the laser sensor 614 gradually decreases. When the mounting plate 4 completely enters the fixed sleeve 6, the laser sensor 614 senses that the distance has reached the specified position, and then transmits the electrical signal to the electric push rod 5. When the electric push rod 5 is started, the electric push rod 5 pushes the fixed sleeve 6 carrying the mounting plate 4 to move backward, and then reaches the storage platform 2, realizing automatic transmission.

[0037] like Figure 5 As shown, the mounting plate 4 is divided into a connecting portion 41 and a placing portion 42. The placing portion 42 is located in the inner ring of the connecting portion 41 and is used to support the display screen. The connecting portion 41 is provided with a plurality of connecting holes 411. A fixing ring 62 is installed on the fixing sleeve 6. When the fixing sleeve 6 is not in contact with the mounting plate 4, a latch 63 is installed on the side wall of the fixing sleeve 6. A fixing groove 621 is provided on the fixing ring 62. A reset spring 64 is installed between the latch 63 and the fixing sleeve 6.

[0038] The display screen is initially placed on the placement portion 42 to form a preliminary positioning. At this time, the display screen and the mounting plate 4 are relatively fixed, and during the transmission of the display screen, there will be no problems with the surface or internal display of the display screen due to friction, collision, etc.; a number of fixed shafts are installed at the bottom of the fixing ring 62, and the fixed shafts correspond to the connecting holes 411 one by one. When the conveyor belt 3 brings the mounting plate 4 to the fixing sleeve 6, as the conveyor belt 3 is gradually input, the right end of the mounting plate 4 first enters the fixing sleeve 6, and then under the friction force of the conveyor belt 3 on the left side of the mounting plate 4, the mounting plate 4 gradually enters the fixing sleeve 6; at this time, the laser sensor 614 transmits the signal to the electric push rod 5, and the electric push rod 5 drives the fixing sleeve 6 to pass through the baffle 9 When the locking cam 63 is engaged, the locking cam 63 is engaged with the locking cam 64, and the locking cam 63 is engaged with the locking cam 64. When the locking cam 63 is engaged, the locking cam 63 is engaged with the locking cam 64, and the locking cam 63 is engaged with the locking cam 64. When the locking cam 63 is engaged, the locking cam 63 is engaged with the locking cam 64, and the locking cam 63 is engaged with the locking cam 64.

[0039] like Figure 3 , 4 As shown in FIGS. 6 and 7 , the fixing mechanism 7 includes a positioning column 71 and a pressure plate 72. The positioning column 71 is installed on the side of the storage platform 2, and the pressure plate 72 is located above the storage platform 2. The side cross-section of the pressure plate 72 is trapezoidal in shape. A rounded corner 711 is provided at the front end edge of the positioning column 71.

[0040] When the fixing sleeve 6 moves toward the storage platform 2, it will pass through the positioning column 71. The positioning column 71 and the storage platform 2 together form a concave shape. When the fixing sleeve 6 passes the positioning column 71, if the fixing sleeve 6 is not tilted at this time, it will directly move forward along the edge of the positioning column 71 and then move inward. If the fixing sleeve 6 is tilted at this time, the rounded corner 711 of the positioning column 71 will gradually correct the fixing sleeve 6, and then keep the fixing sleeve 6 in a straight direction to enter, thereby preventing the fixing sleeve 6 from tilting in, causing the mounting plate 4 and the display screen to be detected to tilt in, thereby affecting the display screen imaging recognition effect; after entering the positioning column 71, the upper fixing ring 62 will be aligned with the fixing ring 62 at this time. The pressure plate 72 at the top contacts with each other, and as it goes deeper inward, the pressure plate 72 gradually increases the squeezing force on the fixing ring 62, thereby pushing the pressure plate 72 downward. When the pressure plate 72 moves downward, it pushes the latch 63 to move sideways, thereby squeezing the reset spring 64, and the fixing ring 62 moves downward, so that the mounting plate 4 is fixed by the fixed shaft on the fixing ring 62, and then the latch 63 enters the fixing groove 621, so that the fixing ring 62, the fixing sleeve 6 and the mounting plate 4 remain fixed, and then the mounting plate 4 will only move deeper in a straight line direction at this time, thereby improving the position fixation of the display screen to be detected, reducing the shaking during the imaging recognition process, and improving the accuracy of imaging recognition.

[0041] like Figure 6 , 7 As shown in , 8, the adjustment mechanism 8 includes a push block 81, a rack 82, a ratchet 83, a connecting rod 84, a support plate 85, a limit spring 86 and a torsion spring 87. The push block 81 is installed on the positioning column 71, and the rack 82 is installed on the end of the push block 81 away from the positioning column 71. The ratchet 83 is installed in the equipment body 1 and close to the outer edge of the storage platform 2. The ratchet 83 is unidirectionally meshed with the rack 82. The ratchet 83 includes a wheel body 831, a ratchet tooth 832 and a bending spring 833. The wheel body 831 and the ratchet tooth 832 are hinged on one side, and the bending spring 833 is located between the free ends of the wheel body 831 and the ratchet tooth 832. The connecting rod 84 is installed on the wheel body 831, and the other end of the connecting rod 84 is installed with a support plate 85. The limit spring 86 is installed between the push block 81 and the positioning column 71, and the torsion spring 87 is installed between the push block 81 and the rack 82.

[0042] The distance between the push block 81 and the front end of the positioning column 71 is greater than the length of the fixing sleeve 6 in the front-to-back direction, thereby ensuring that when the push block 81 pushes the baffle 9 to fold, it will not affect the fixing sleeve 6 and the display screen to be detected on the fixing sleeve 6;

[0043] When the fixed sleeve 6 continues to move deeper, the fixed sleeve 6 will contact the push block 81. At this time, the elastic force of the limit spring 86 is less than the elastic force of the torsion spring 87. The fixed sleeve 6 will push the push block 81 to move forward synchronously, and the other end of the push block 81 is connected to the rack 82, and the rack 82 will drive the ratchet 83 matched therewith to rotate. When looking from left to right, when the rack 82 moves backward at this time, the ratchet 83 rotates clockwise, thereby driving the connecting rod 84 to rotate synchronously clockwise. The connecting rod 84 and the ratchet 83 are hinged, and one end of the connecting rod 84 located on the ratchet 83 is connected to the ratchet 83. The intermediate position is changed to the upper position of the ratchet 83, thereby driving the support plate 85 at the other end of the connecting rod 84 to move upward synchronously, and then the support plate 85 will push the baffle 9 to fold clockwise. Based on the magnitude of the folding force at this point, the material and structure of the baffle 9 can be selected as a density and light material. At the same time, during the rotation of the baffle 9, the point of action of the support plate 85 on the baffle 9 moves from the direction close to the hinge point of the baffle 9 and the storage platform 2 to the direction close to the hinge point of the baffle 9 and the storage platform 2 (i.e., moves forward), thereby alleviating the problem of the gradual increase of gravity as the baffle 9 gradually rises; the ratchet 84 at this point 3 is relatively conventional, thereby reducing the problem of interference. Of course, gears can be used here. The ratchet 83 is more tolerant than the gears. Although it increases a certain cost, in the process of automation, the ratchet 83 can avoid the excessive rotation angle of the gear due to the limit spring 86 resetting too quickly, thereby causing the connection between the connecting rod 84 on the ratchet 83 to reach the position directly below, that is, the dead point in the crank connecting rod 84, thereby affecting the overall work; in the process of the fixed sleeve 6 gradually moving, the force of the limit spring 86 gradually increases until it is equal to the force of the torsion spring 87, and then the fixed sleeve 6 is fixed. The sleeve 6 remains relatively still, which facilitates the imaging recognition of the display screen to be detected. When the electric push rod 5 applies force again, the pressing force of the limit spring 86 on the push block 81 is greater than the force of the torsion spring 87, and the push block 81 is folded, so that the fixed sleeve 6 passes over the push block 81, and the push block 81 is reset under the action of the limit spring 86, and the synchronous baffle 9 is reset under the action of its own gravity, and then the ratchet 83 is reset. The ratchet 83 will limit the reset position of the rack 82 while resetting, so as to avoid the elasticity of the limit spring 86 causing the rack 82 to jump repeatedly, thereby deflecting and affecting the next work.

[0044] like Figure 6 As shown, the length of the baffle plate 9 in the front-to-back direction is equal to the distance between the storage platform 2 and the top, and the thickness of the baffle plate 9 gradually decreases from the center to both sides.

[0045] At this time, the baffle 9 can just cover the inside of the device body 1 after being folded, which on the one hand reduces the entry of dust into the inside, and on the other hand prevents external light from entering the inside and affecting the light detected internally, thereby improving the accuracy of display screen imaging recognition. The internal light is irradiated on the baffle 9. If the baffle 9 reflects the light on the display screen at this time, it will also affect the display screen. Therefore, the baffle 9 is set to be inclined and tilted from the center to both sides, so that the light shining on the baffle 9 can be reflected to the edge area, reducing the influence of the reflected light on the display screen imaging recognition.

[0046] First, the display screen is placed in the installation plate 4. Then, under the action of the conveyor belt 3, the installation plate 4 gradually arrives at the front end of the storage platform 2 with the display screen to be detected, and then enters the fixing sleeve 6. Under the action of the electric push rod 5, the fixing sleeve 6 moves toward the storage platform 2 through the baffle 9 with the installation plate 4. At this time, it will pass through the positioning column 71. When the fixing sleeve 6 passes through the positioning column 71, if the fixing sleeve 6 is not tilted at this time, it will directly move forward along the edge of the positioning column 71 and then move inward. If the fixing sleeve 6 is tilted at this time, the rounded corner 711 of the positioning column 71 will gradually correct the fixing sleeve 6, and then keep the fixing sleeve 6 in a straight direction.

[0047] After entering the positioning column 71, the upper fixing ring 62 will contact the top pressure plate 72. As it goes deeper inward, the pressure plate 72 gradually increases the squeezing force on the fixing ring 62, thereby pushing the pressure plate 72 to move downward. When the pressure plate 72 moves downward, it pushes the latch 63 to move sideways, thereby squeezing the return spring 64, and the fixing ring 62 moves downward, so that the mounting plate 4 is fixed by the fixing shaft on the fixing ring 62. Then the latch 63 enters the fixing groove 621, and the fixing ring 62, the fixing sleeve 6 and the mounting plate 4 are fixed.

[0048] When the fixing sleeve 6 continues to move deeper, the fixing sleeve 6 will contact the push block 81. At this time, the elastic force of the limit spring 86 is less than the elastic force of the torsion spring 87, and the fixing sleeve 6 will push the push block 81 to move forward synchronously. The other end of the push block 81 is connected to the rack 82, and the rack 82 will drive the ratchet 83 matched therewith to rotate, thereby driving the support plate 85 at the other end of the connecting rod 84 to move upward synchronously, and then the support plate 85 will push the baffle 9 to fold clockwise; in the process of the fixing sleeve 6 gradually moving, the force of the limit spring 86 gradually increases until it is equal to the force of the torsion spring 87, and then the fixing sleeve 6 remains relatively still, thereby facilitating the imaging recognition of the display screen to be detected;

[0049] As the electric push rod 5 continues to push, the pressing force of the limit spring 86 on the push block 81 is greater than the force of the torsion spring 87, the push block 81 is folded, and then the fixed sleeve 6 passes over the push block 81, the push block 81 is reset under the action of the limit spring 86, the synchronous baffle 9 is reset under the action of its own gravity, and then the ratchet 83 is reset, and then the fixed sleeve 6 reaches the rear transmission belt, and the front conveyor belt 3 continues to convey the mounting plate 4 to achieve a cycle.

[0050] The basic principles and beneficial effects of the present invention are shown and described above. At the same time, the present invention is not limited to the above embodiments. Without departing from the effects and scope of the present invention, the present invention may have various changes and improvements. These changes and improvements all fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid crystal display AOI online imaging recognition device, characterized by: The device comprises a device body (1), a storage platform (2), a conveyor belt (3), a mounting plate (4), an electric push rod (5), a fixing sleeve (6), a fixing mechanism (7), an adjusting mechanism (8), and a baffle (9), wherein the storage platform (2) is installed inside the device body (1), the conveyor belt (3) is located at the front side of the storage platform (2), a display screen to be detected is placed on the mounting plate (4), the initial position of the mounting plate (4) is located at the left side of the conveyor belt (3), the electric push rod (5) is installed above the conveyor belt (3), the fixing sleeve (6) is located above the conveyor belt (3) and at the output end of the electric push rod (5), and the A supplementary unit (61) is provided at the fixed sleeve (6), the fixed mechanism (7) is located at the storage platform (2), the adjustment mechanism (8) is located on the fixed sleeve (6), the baffle (9) is installed on the front side of the storage platform (2), the conveyor belt (3) conveys the mounting plate (4) into the fixed sleeve (6), the electric push rod (5) pushes the fixed sleeve (6) to the storage platform (2), the fixed mechanism (7) is driven by the electric push rod (5) to fix the fixed sleeve (6) and the mounting plate (4), and the baffle (9) drives the adjustment mechanism (8) through the fixed mechanism (7) to automatically block dust at the entrance of the storage platform (2); The fixing mechanism (7) comprises a positioning column (71) and a pressing plate (72), wherein the positioning column (71) is mounted on the side of the storage platform (2), and the pressing plate (72) is located above the storage platform (2), and the side-view cross-section of the pressing plate (72) is a trapezoid; The adjusting mechanism (8) comprises a push block (81), a rack (82), a ratchet (83), a connecting rod (84), a support plate (85), a limit spring (86) and a torsion spring (87); the push block (81) is mounted on the positioning column (71); the rack (82) is mounted on an end of the push block (81) away from the positioning column (71); the ratchet (83) is mounted in the device body (1) and close to the storage platform (2); the ratchet (83) is unidirectionally meshed with the rack (82); the ratchet (83) comprises a wheel body (83); 1), a ratchet (832) and a bending spring (833), the wheel body (831) and the ratchet (832) are hinged on one side, the bending spring (833) is located between the wheel body (831) and the free end of the ratchet (832), the connecting rod (84) is mounted on the wheel body (831), the other end of the connecting rod (84) is mounted with a supporting plate (85), the limit spring (86) is mounted between the push block (81) and the positioning column (71), and the torsion spring (87) is mounted between the push block (81) and the rack (82).

2. The liquid crystal display AOI online imaging recognition device according to claim 1, characterized in that: The supplementary unit (61) comprises a compression spring (611), a support plate (612) and a limit bracket (613); one end of the compression spring (611) is mounted on the device body (1); the support plate (612) is located at the other end of the compression spring (611); the limit bracket (613) is mounted on the right side of the conveyor belt (3); a plurality of fixing sleeves (6) are placed between the limit bracket (613) and the support plate (612); a laser sensor (614) is mounted on the limit bracket (613); and the laser sensor (614) is connected to the electric push rod (5) via an electrical signal.

3. The liquid crystal display AOI online imaging recognition device according to claim 2, characterized in that: The mounting plate (4) is divided into a connecting portion (41) and a placing portion (42); the connecting portion (41) is provided with a plurality of connecting holes (411); a fixing ring (62) is installed on the fixing sleeve (6); a latch (63) is installed on the fixing sleeve (6); a fixing groove (621) is provided on the fixing ring (62); and a return spring (64) is installed between the latch (63) and the fixing sleeve (6).

4. The liquid crystal display AOI online imaging recognition device according to claim 1, characterized in that: A rounded corner (711) is provided at the front end edge of the positioning column (71).

5. The liquid crystal display AOI online imaging recognition device according to claim 1, characterized in that: The length of the baffle (9) in the front-to-back direction is equal to the distance between the storage platform (2) and the top, and the thickness of the baffle (9) gradually decreases from the center to the two sides.

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