LED display screen flatness detection device

Abstract

The invention relates to the technical field of flatness detection, and discloses an LED display screen flatness detection device, which comprises a detection box, an air box is fixedly mounted on the inner wall of the top of the detection box, a reciprocating threaded rod is rotatably mounted in the air box, the reciprocating threaded rod penetrates through the air box, a plurality of fan blades are fixedly mounted on the reciprocating threaded rod, and the fan blades are rotatably mounted in the air box. The dust removal device further comprises a dust removal mechanism, the dust removal mechanism comprises a driving motor fixedly installed on the front face of the air bellow, an output shaft of the driving motor is fixedly connected with the reciprocating threaded rod, and a plurality of exhaust pipes are fixedly installed on the front face of the air bellow. Air with dust can be discharged into the first cavity from the holes in the first T-shaped hollow annular plate with the holes, large dust particles can be left on the inner wall of the bottom of the first cavity, small dust can be discharged from the holes in the front face of the air outlet hollow box, it is guaranteed that no dust is left in the detection box, and the detection efficiency is improved. Errors are avoided when the laser detector detects the flatness of the LED display screen through laser, and the detection accuracy is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of flatness detection equipment, and in particular to a flatness detection device for an LED display screen. Background Art

[0002] In the inspection of finished LED display screens, flatness inspection is a more important step, and the flatness of LED display screens will affect the display effect of LED display screens. The smaller the flatness, the smoother the display screen, the more uniform the color, and the better the viewing effect. The larger the flatness, the easier it is for the display screen to be distorted, the easier it is for the color to be broken, and the worse the viewing effect. Existing LED display screen flatness detection devices often use infrared or laser detection to ensure the accuracy of their detection and can obtain flatness data more accurately.

[0003] When placing the LED display screen, the detection box needs to be opened. At this time, dust in the air will enter the detection box, and the LED display screen will also be stained with dust. When using laser detection, the reflection of dust particles is diffuse reflection, which will cause the reflected light to scatter in all directions. The weakening of the light intensity received by the detector may cause the contrast of the interference fringes to decrease, affecting the subsequent analysis and processing of the fringes, making it difficult to accurately measure the flatness of the display screen. Summary of the invention

[0004] The purpose of the present invention is to provide a flatness detection device for an LED display screen, so as to solve the problem that when placing an LED display screen, a detection box needs to be opened. At this time, dust in the air will enter the detection box, and the LED display screen will also be stained with dust. When using laser detection, since the reflection of dust particles is diffuse reflection, this will cause the reflected light to be scattered in all directions. The weakening of the light intensity received by the detector may cause the contrast of the interference fringes to decrease, affecting the subsequent analysis and processing of the fringes, making it difficult to accurately measure the flatness of the display screen.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a device for detecting the flatness of an LED display screen, comprising a detection box, a bellows fixedly mounted on the top inner wall of the detection box, a reciprocating threaded rod rotatably mounted in the bellows, the reciprocating threaded rod penetrates the bellows, a plurality of fan blades are fixedly mounted on the reciprocating threaded rod, and further comprising:

[0007] Dust removal mechanism, the dust removal mechanism includes a driving motor fixedly installed on the front of the air box, the output shaft of the driving motor is fixedly connected with a reciprocating threaded rod, several exhaust pipes are fixedly installed on the front of the air box, an air outlet hollow box is fixedly installed on the front of the detection box, the front ends of several exhaust pipes communicate with the air outlet hollow box, an L-shaped air inlet pipe is fixedly installed at the bottom of the air box, an air inlet groove is formed on the front of the L-shaped air inlet pipe, a mounting plate is fixedly installed in the detection box, a laser detector is fixedly installed at the bottom of the mounting plate, a rectangular fixing frame is fixedly installed in the detection box, a closing door is hingedly installed on the front of the detection box, and a T-shaped plate is slidably installed through the L-shaped air inlet pipe.

[0008] Further, a positioning mechanism is arranged in the detection box, the positioning mechanism includes a positioning plate fixedly installed in the detection box, a rectangular rod is slidably penetrated through the positioning plate, a triangular plate is fixedly installed at the top end of the rectangular rod, the triangular plate penetrates through the rectangular fixing frame and is slidably connected with the rectangular fixing frame, a positioning spring is sleeved on the rectangular rod, the top end of the positioning spring is fixedly connected with the rectangular fixing frame, the bottom end of the positioning spring is fixedly connected with the positioning plate, two limiting rods are fixedly installed in the detection box, and both of the two limiting rods penetrate through the positioning plate and are slidably connected with the positioning plate.

[0009] Further, a connecting rod is hingedly installed on the back of the positioning plate, the end of the connecting rod is hingedly installed with a U-shaped sliding rod, the U-shaped sliding rod is slidably connected with the detection box, a positioning push plate is fixedly installed at the end of the U-shaped sliding rod, the positioning push plate is adapted to the rectangular fixing frame, several clamping springs are fixedly installed at the end of the positioning push plate, and the ends of several clamping springs are all fixedly connected with the detection box.

[0010] Further, a sealing mechanism is arranged on the detection box, the sealing mechanism includes a cavity one and a cavity two formed in the air outlet hollow box, the cavity one communicates with the cavity two, a perforated T-shaped hollow ring plate one is slidably installed in the cavity two, a sealing spring one is fixedly installed on the front inner wall of the perforated T-shaped hollow ring plate one, and the end of the sealing spring one is fixedly connected with the air outlet hollow box.

[0011] Further, an air inlet hollow box is fixedly installed on the back of the detection box, a cavity three and a cavity four are formed in the air inlet hollow box, a perforated T-shaped hollow ring plate two is slidably installed in the cavity three, a sealing spring two is fixedly installed on the front inner wall of the perforated T-shaped hollow ring plate two, and the end of the sealing spring two is fixedly connected with the air inlet hollow box.

[0012] Further, the end of the reciprocating threaded rod penetrates into the air inlet hollow box and is rotatably connected to the air inlet hollow box. The right end of the L-shaped air inlet pipe communicates with the cavity four. A plurality of cleaning plates are fixedly installed on the outer wall of the reciprocating threaded rod, and the front surfaces of the plurality of cleaning plates are all in contact with the air inlet hollow box.

[0013] Further, a dust removal mechanism is arranged on the reciprocating threaded rod. The dust removal mechanism includes an internally threaded plate threadedly sleeved on the reciprocating threaded rod. The top of the internally threaded plate is fixedly installed with an L-shaped sliding rod. The L-shaped sliding rod penetrates through the air outlet hollow box and is slidably connected to the air outlet hollow box and the detection box. The front end of the L-shaped sliding rod is fixedly installed with a T-shaped contact plate.

[0014] Further, a T-shaped adaptation plate is fixedly installed on the front surface of the air outlet hollow box. A U-shaped sliding plate is slidably sleeved on the T-shaped adaptation plate. A dust removal spring is sleeved on the T-shaped adaptation plate. The top end of the dust removal spring is fixedly connected to the T-shaped adaptation plate. The bottom end of the T-shaped contact plate is fixedly connected to the U-shaped sliding plate. The bottom end of the U-shaped sliding plate extends into the air outlet hollow box and is slidably connected to the air outlet hollow box. The front surface of the U-shaped sliding plate is fixedly installed with an L-shaped movable plate. The left side and the right side of the L-shaped movable plate are respectively fixedly installed with L-shaped fixing plates. The bottom ends of the two L-shaped fixing plates both extend into the detection box and are both slidably connected to the detection box. The sides of the two L-shaped fixing plates close to each other are both fixedly connected to the T-shaped plate.

[0015] The present invention has the following beneficial effects:

[0016] (1) For an LED display screen flatness detection device of the present invention, after placing and fixing the LED display screen in the loop-shaped fixing frame, start the driving motor. The driving motor drives the reciprocating threaded rod to rotate. The reciprocating threaded rod drives a plurality of fan blades to rotate. The rotation of the plurality of fan blades generates a suction force. The suction force sucks air into the detection box through the air inlet groove on the front surface of the L-shaped air inlet pipe. At this time, the detection box is in a sealed state. During the air suction process, a negative pressure is generated in the detection box. Under the negative pressure state, the dust in the detection box including on the LED display screen will be sucked into the L-shaped air inlet pipe, and then from the air box, the exhaust pipe to the air outlet hollow box. The air will push the perforated T-shaped hollow ring plate one in the cavity two to move away from the detection box. At this time, the sealing spring one undergoes a tensile deformation. When the hole on the perforated T-shaped hollow ring plate one enters the cavity one, the air with dust will be discharged into the cavity one from the hole on the perforated T-shaped hollow ring plate one. Larger dust particles will remain on the inner wall of the bottom of the cavity one, and smaller dust will be discharged from the hole on the front surface of the air outlet hollow box, ensuring that there is no residual dust in the detection box, ensuring that there is no error when the laser detector laser-detects the flatness of the LED display screen, and effectively improving the detection accuracy;

[0017] (2) For a flatness detection device of an LED display screen according to the present invention, when placing the LED display screen, open the closing door and slide the LED display screen into the loop-shaped fixing frame. When the LED display screen touches the triangular plate, the triangular plate will descend. At this time, the positioning spring undergoes compressive deformation. When the LED display screen touches and pushes the positioning push plate, the positioning push plate will drive the U-shaped sliding rod to move away from the detection box. At this time, the clamping spring undergoes compressive deformation. The U-shaped sliding rod will drive the connecting rod to move synchronously, and the connecting rod will drive the positioning plate to rise. At this time, the positioning spring will further undergo compressive deformation. After the LED display screen leaves the triangular plate, the positioning spring will pop out under the action of elastic force to limit the position of the LED display screen. Correspondingly, the clamping spring will, under the action of elastic force, cause the positioning push plate to further limit the position of the LED display screen, thereby accurately positioning the LED display screen and preventing the LED display screen from shifting during the detection process or the laser detector from not being directly facing the LED display screen, resulting in detection errors;

[0018] (3) For a flatness detection device of an LED display screen according to the present invention, during the rotation of the reciprocating threaded rod, it will drive the internally threaded plate to move back and forth. When the internally threaded plate moves forward, it will drive the L-shaped sliding rod to move. The L-shaped sliding rod will drive the T-shaped contact plate to move away from the air outlet hollow box. The T-shaped contact plate will touch the U-shaped sliding plate. The U-shaped sliding plate will descend under the action of its inclined surface. At this time, the dust exhaust spring undergoes tensile deformation. The U-shaped sliding plate will leave the air outlet hollow box. At this time, the air blown out from the cavity one will blow out from the gap between the U-shaped sliding plate and the air outlet hollow box and blow off the larger dust particles that have fallen on the U-shaped sliding plate, preventing the accumulation of larger dust on the U-shaped sliding plate and causing blockage in the cavity one and unable to exhaust air normally;

[0019] (4) The present invention provides a flatness detection device for an LED display screen. When the L-shaped sliding plate descends, it will drive the L-shaped movable plate to descend, the L-shaped movable plate will drive the L-shaped fixed plate to descend, and the L-shaped fixed plate will drive the T-shaped plate to descend. At this time, the L-shaped air inlet pipe is connected to the air inlet hollow box. The negative pressure in the detection box will cause the T-shaped hollow ring plate with holes to be sucked in the direction close to the detection box. At this time, the sealing spring 2 will be stretched and deformed. When the hole on the T-shaped hollow ring plate with holes enters the cavity 4, the negative pressure will suck the outside air into the detection box. During the rotation of the reciprocating threaded rod, it will drive a number of cleaning plates to rotate. The cleaning plates will remove the accumulated air on the back of the air inlet hollow box. The dust on the surface is scraped off to avoid dust clogging and affecting the normal air suction effect of the device. The outside air entering the detection box will be taken away together with the heat generated by the laser detector during detection and discharged out of the detection box to avoid high temperature in the detection box affecting the detection results. In the process of reciprocating movement of the internal threaded plate, there will be continuous negative pressure and air intake in the detection box to maintain the alternation of dust removal and heat dissipation. When the drive motor stops running, the corresponding sealing spring 2 and sealing spring 1 will reset the perforated T-shaped hollow ring plate 2 and the perforated T-shaped hollow ring plate 1 under the action of elastic force to ensure the sealing of the detection box, avoid dust from entering the detection box and reduce the impact of dust on detection.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of a side partial cross-sectional structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0025] Figure 4 It is a side cross-sectional structural schematic diagram of the present invention;

[0026] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of B;

[0027] Figure 6 For the present invention Figure 2 Schematic diagram of the enlarged structure of C;

[0028] Figure 7 For the present invention Figure 4 Schematic diagram of the enlarged structure of D in it;

[0029] Figure 8 For the present invention Figure 4 Schematic diagram of the enlarged structure of E in it.

[0030] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0031] In the figure: 1, detection box; 2, air box; 3, reciprocating threaded rod; 4, fan blade; 5, dust removal mechanism; 501, drive motor; 502, exhaust duct; 503, air outlet hollow box; 505, L-shaped air inlet pipe; 506, air inlet groove; 508, mounting plate; 509, laser detector; 510, rectangular fixing frame; 511, closing door; 512, T-shaped plate; 6, positioning mechanism; 601, positioning plate; 602, rectangular rod; 603, triangular plate; 604, positioning spring; 605, limiting rod; 606, connecting rod; 607, U-shaped sliding rod; 608, positioning push plate; 609, clamping spring; 7, sealing mechanism; 701, cavity one; 702, cavity two; 703, perforated T-shaped hollow ring plate one; 704, sealing spring one; 707, air inlet hollow box; 708, cavity three; 709, cavity four; 710, perforated T-shaped hollow ring plate two; 711, sealing spring two; 712, cleaning plate; 8, dust discharging mechanism; 801, internally threaded plate; 802, L-shaped sliding rod; 803, T-shaped contact plate; 804, T-shaped adapting plate; 805, U-shaped sliding plate; 806, dust discharging spring; 807, L-shaped movable plate; 808, L-shaped fixing plate. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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, rather than all 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.

[0033] Please refer to Figure 1 - Figure 8 As shown, the present invention is an LED display screen flatness detection device, including a detection box 1. An air box 2 is fixedly installed on the inner wall of the top of the detection box 1. A reciprocating threaded rod 3 is rotatably installed in the air box 2. The reciprocating threaded rod 3 penetrates through the air box 2. A plurality of fan blades 4 are fixedly installed on the reciprocating threaded rod 3. Further included are:

[0034] Dust removal mechanism 5, the dust removal mechanism 5 includes a driving motor 501 fixedly installed on the front of the air box 2, the output shaft of the driving motor 501 is fixedly connected to the reciprocating threaded rod 3, several exhaust pipes 502 are fixedly installed on the front of the air box 2, an air outlet hollow box 503 is fixedly installed on the front of the detection box 1, the front ends of several exhaust pipes 502 are all communicated with the air outlet hollow box 503, an L-shaped air inlet pipe 505 is fixedly installed at the bottom of the air box 2, an air inlet groove 506 is opened on the front of the L-shaped air inlet pipe 505, a mounting plate 508 is fixedly installed in the detection box 1, a laser detector 509 is fixedly installed at the bottom of the mounting plate 508, a rectangular fixing frame 510 is fixedly installed in the detection box 1, a closing door 511 is hingedly installed on the front of the detection box 1, and a T-shaped plate 512 is slidably installed through the L-shaped air inlet pipe 505.

[0035] As Figure 2 and Figure 5 shown, a positioning mechanism 6 is arranged in the detection box 1, the positioning mechanism 6 includes a positioning plate 601 fixedly installed in the detection box 1, a rectangular rod 602 is slidably penetrated through the positioning plate 601, a triangular plate 603 is fixedly installed at the top end of the rectangular rod 602, the triangular plate 603 penetrates through the rectangular fixing frame 510 and is slidably connected with the rectangular fixing frame 510, a positioning spring 604 is sleeved on the rectangular rod 602, the top end of the positioning spring 604 is fixedly connected with the rectangular fixing frame 510, the bottom end of the positioning spring 604 is fixedly connected with the positioning plate 601, two limiting rods 605 are fixedly installed in the detection box 1, and both two limiting rods 605 penetrate through the positioning plate 601 and are slidably connected with the positioning plate 601.

[0036] When placing the LED display screen, open the closing door 511 and slide the LED display screen into the rectangular fixing frame 510. When the LED display screen touches the triangular plate 603, the triangular plate 603 will descend, and at this time, the positioning spring 604 undergoes a compressive deformation.

[0037] As Figure 2 、 Figure 4 and Figure 5 shown, a connecting rod 606 is hingedly installed on the back of the positioning plate 601, the end of the connecting rod 606 is hingedly installed with a U-shaped sliding rod 607, the U-shaped sliding rod 607 is slidably connected with the detection box 1, a positioning push plate 608 is fixedly installed at the end of the U-shaped sliding rod 607, the positioning push plate 608 is adapted to the rectangular fixing frame 510, several clamping springs 609 are fixedly installed at the end of the positioning push plate 608, and the ends of several clamping springs 609 are all fixedly connected with the detection box 1.

[0038] When the LED display contacts and pushes the positioning push plate 608, the positioning push plate 608 drives the U-shaped slide bar 607 to move away from the detection box 1. At this time, the clamping spring 609 undergoes a compressive deformation. The U-shaped slide bar 607 drives the connecting rod 606 to move synchronously, and the connecting rod 606 drives the positioning plate 601 to rise. At this time, the positioning spring 604 further undergoes a compressive deformation. After the LED display leaves the triangular plate 603, the positioning spring 604 pops out under the action of elastic force to limit the LED display. Correspondingly, the clamping spring 609 makes the positioning push plate 608 further limit the LED display under the action of elastic force, so as to accurately position the LED display, avoid the displacement of the LED display during the detection process, or prevent the laser detector 509 from not being directly facing the LED display, resulting in detection errors.

[0039] As Figure 6 shown, a sealing mechanism 7 is provided on the detection box 1. The sealing mechanism 7 includes a cavity one 701 and a cavity two 702 opened in the air outlet hollow box 503. The cavity one 701 communicates with the cavity two 702. A perforated T-shaped hollow ring plate one 703 is slidably installed in the cavity two 702. A sealing spring one 704 is fixedly installed on the front inner wall of the perforated T-shaped hollow ring plate one 703. The end of the sealing spring one 704 is fixedly connected to the air outlet hollow box 503.

[0040] The air will push the perforated T-shaped hollow ring plate one 703 in the cavity two 702 to move away from the detection box 1. At this time, the sealing spring one 704 undergoes a tensile deformation. When the hole on the perforated T-shaped hollow ring plate one 703 enters the cavity one 701, the dusty air will be discharged into the cavity one 701 from the hole on the perforated T-shaped hollow ring plate one 703. Larger dust particles will remain on the bottom inner wall of the cavity one 701, and smaller dust will be discharged from the hole on the front of the air outlet hollow box 503, ensuring that no dust remains in the detection box 1, ensuring that there will be no error when the laser detector 509 laser detects the flatness of the LED display, and effectively improving the detection accuracy.

[0041] As Figure 3 shown, an air inlet hollow box 707 is fixedly installed on the back of the detection box 1. A cavity three 708 and a cavity four 709 are opened in the air inlet hollow box 707. A perforated T-shaped hollow ring plate two 710 is slidably installed in the cavity three 708. A sealing spring two 711 is fixedly installed on the front inner wall of the perforated T-shaped hollow ring plate two 710. The end of the sealing spring two 711 is fixedly connected to the air inlet hollow box 707.

[0042] The negative pressure in the detection box 1 will suck the perforated T-shaped hollow ring plate two 710 towards the detection box 1. At this time, the sealing spring two 711 undergoes a tensile deformation. After the hole on the perforated T-shaped hollow ring plate two 710 enters the cavity four 709, the negative pressure will suck the outside air into the detection box 1.

[0043] As Figure 3 shown, the end of the reciprocating threaded rod 3 penetrates into the air inlet hollow box 707 and is rotatably connected to the air inlet hollow box 707. The right end of the L-shaped air inlet pipe 505 communicates with the cavity four 709. A plurality of cleaning plates 712 are fixedly installed on the outer wall of the reciprocating threaded rod 3, and the front surfaces of the plurality of cleaning plates 712 are all in contact with the air inlet hollow box 707.

[0044] During the rotation of the reciprocating threaded rod 3, it will drive a plurality of cleaning plates 712 to rotate. The cleaning plates 712 will scrape off the dust accumulated on the holes on the back of the air inlet hollow box 707, avoiding the blockage of dust and affecting the normal air suction effect of the device.

[0045] As Figure 3 、 Figure 6 and Figure 8 shown, a dust discharging mechanism 8 is arranged on the reciprocating threaded rod 3. The dust discharging mechanism 8 includes an internal thread plate 801 threadedly sleeved on the reciprocating threaded rod 3. The top of the internal thread plate 801 is fixedly installed with an L-shaped sliding rod 802. The L-shaped sliding rod 802 penetrates through the air outlet hollow box 503 and is slidably connected to the air outlet hollow box 503 and the detection box 1. The front end of the L-shaped sliding rod 802 is fixedly installed with a T-shaped contact plate 803.

[0046] During the rotation of the reciprocating threaded rod 3, it will drive the internal thread plate 801 to move back and forth. When the internal thread plate 801 moves forward, it will drive the L-shaped sliding rod 802 to move, and the L-shaped sliding rod 802 will drive the T-shaped contact plate 803 to move away from the air outlet hollow box 503.

[0047] As Figure 3 、 Figure 6 and Figure 8 shown, a T-shaped adapting plate 804 is fixedly installed on the front surface of the air outlet hollow box 503. A U-shaped sliding plate 805 is slidably sleeved on the T-shaped adapting plate 804. A dust discharging spring 806 is sleeved on the T-shaped adapting plate 804. The top end of the dust discharging spring 806 is fixedly connected to the T-shaped adapting plate 804. The bottom end of the T-shaped contact plate 803 is fixedly connected to the U-shaped sliding plate 805. The bottom end of the U-shaped sliding plate 805 extends into the air outlet hollow box 503 and is slidably connected to the air outlet hollow box 503. The front surface of the U-shaped sliding plate 805 is fixedly installed with an L-shaped movable plate 807. The left side and the right side of the L-shaped movable plate 807 are respectively fixedly installed with L-shaped fixing plates 808. The bottom ends of the two L-shaped fixing plates 808 both extend into the detection box 1 and are both slidably connected to the detection box 1. One side of the two L-shaped fixing plates 808 close to each other is fixedly connected to the T-shaped plate 512.

[0048] The T-shaped contact plate 803 will come into contact with the C-shaped sliding plate 805. Under the action of its inclined plane, the C-shaped sliding plate 805 will descend. At this time, the dust exhaust spring 806 will undergo tensile deformation. The C-shaped sliding plate 805 will leave the air outlet hollow box 503. At this time, the air blown out from the cavity one 701 will blow out from the gap between the C-shaped sliding plate 805 and the air outlet hollow box 503, and blow off the larger dust particles that have fallen on the C-shaped sliding plate 805, avoiding the accumulation of larger dust on the C-shaped sliding plate 805, resulting in blockage in the cavity one 701 and unable to exhaust air normally.

[0049] After placing and fixing the LED display screen in the U-shaped fixing frame 510, start the driving motor 501. The driving motor 501 drives the reciprocating threaded rod 3 to rotate. The reciprocating threaded rod 3 drives several fan blades 4 to rotate. The rotation of several fan blades 4 will generate a suction force. The suction force will suck air into the detection box 1 through the air inlet groove 506 on the front of the L-shaped air inlet pipe 505. At this time, the detection box 1 is in a sealed state. During the air suction process, a negative pressure will be generated in the detection box 1. Under the negative pressure state, the dust in the detection box 1 including the LED display screen will be sucked into the L-shaped air inlet pipe 505, and then enter the air outlet hollow box 503 through the air box 2 and the exhaust pipe 502. The air will push the perforated T-shaped hollow ring plate one 703 in the cavity two 702 to move away from the detection box 1. At this time, the sealing spring one 704 will undergo tensile deformation. When the holes on the perforated T-shaped hollow ring plate one 703 enter the cavity one 701, the air with dust will be discharged into the cavity one 701 from the holes on the perforated T-shaped hollow ring plate one 703. The larger dust particles will remain on the inner wall of the bottom of the cavity one 701, and the smaller dust will be discharged from the holes on the front of the air outlet hollow box 503, ensuring that there is no residual dust in the detection box 1, ensuring that there will be no error when the laser detector 509 laser detects the flatness of the LED display screen, and effectively improving the accuracy of detection; When placing the LED display screen, open the closing door 511 and slide the LED display screen into the U-shaped fixing frame 510. When the LED display screen touches the triangular plate 603, the triangular plate 603 will descend. At this time, the positioning spring 604 will undergo compressive deformation. When the LED display screen touches and pushes the positioning push plate 608, the positioning push plate 608 will drive the C-shaped sliding rod 607 to move away from the detection box 1. At this time, the clamping spring 609 will undergo compressive deformation. The C-shaped sliding rod 607 will drive the connecting rod 606 to move synchronously. The connecting rod 606 will drive the positioning plate 601 to rise. At this time, the positioning spring 604 will further undergo compressive deformation. After the LED display screen leaves the triangular plate 603, the positioning spring 604 will pop out under the action of the elastic force to limit the LED display screen. Correspondingly, the clamping spring 609 will make the positioning push plate 608 further limit the LED display screen under the action of the elastic force, so as to accurately position the LED display screen, avoiding the displacement of the LED display screen during the detection process, or the detection error caused by the laser detector 509 not being directly facing the LED display screen;

[0050] During the rotation of the reciprocating threaded rod 3, the internal threaded plate 801 will be driven to move back and forth. When the internal threaded plate 801 moves forward, it will drive the L-shaped sliding rod 802 to move. The L-shaped sliding rod 802 will drive the T-shaped contact plate 803 to move away from the air outlet hollow box 503. The T-shaped contact plate 803 will contact the C-shaped sliding plate 805. The C-shaped sliding plate 805 will descend under the action of its inclined plane. At this time, the dust removal spring 806 undergoes tensile deformation. The C-shaped sliding plate 805 will leave the air outlet hollow box 503. At this time, the air blown out from the cavity one 701 will blow out from the gap between the C-shaped sliding plate 805 and the air outlet hollow box 503, and blow off the larger dust particles that have fallen on the C-shaped sliding plate 805, avoiding the accumulation of larger dust on the C-shaped sliding plate 805, resulting in blockage in the cavity one 701 and inability to exhaust air normally; during the descent of the C-shaped sliding plate 805, it will drive the L-shaped movable plate 807 to descend. The L-shaped movable plate 807 drives the L-shaped fixed plate 808 to descend. The L-shaped fixed plate 808 drives the T-shaped plate 512 to descend. At this time, the L-shaped air inlet pipe 505 communicates with the air inlet hollow box 707. The negative pressure in the detection box 1 will suck the perforated T-shaped hollow ring plate two 710 towards the detection box 1. At this time, the sealing spring two 711 undergoes tensile deformation. When the holes on the perforated T-shaped hollow ring plate two 710 enter the cavity four 709, the negative pressure will suck the outside air into the detection box 1. During the rotation of the reciprocating threaded rod 3, it will drive a plurality of cleaning plates 712 to rotate. The cleaning plates 712 will scrape off the dust accumulated on the holes on the back of the air inlet hollow box 707, avoiding dust blockage and affecting the normal air suction effect of the device. The outside air entering the detection box 1 will take away the heat generated during the detection by the laser detector 509 and be discharged outside the detection box 1 together, avoiding the generation of high temperature in the detection box 1 and affecting the detection result. During the reciprocating movement of the internal threaded plate 801, the detection box 1 will continuously have negative pressure and intake air, maintaining the alternation of dust removal and heat dissipation. When the drive motor 501 stops running, the corresponding sealing spring two 711 and sealing spring one 704 will, under the action of elastic force, reset the perforated T-shaped hollow ring plate two 710 and the perforated T-shaped hollow ring plate one 703 to ensure the sealing of the detection box 1, avoiding dust entering the detection box 1 and reducing the influence of dust on the detection.

[0051] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A device for detecting the flatness of an LED display screen, comprising a detection box (1), a bellows (2) fixedly mounted on the top inner wall of the detection box (1), a reciprocating threaded rod (3) rotatably mounted in the bellows (2), the reciprocating threaded rod (3) passing through the bellows (2), a plurality of fan blades (4) fixedly mounted on the reciprocating threaded rod (3), characterized in that: It further includes: A dust removal mechanism (5), the dust removal mechanism (5) includes a driving motor (501) fixedly installed on the front of the air box (2), the output shaft of the driving motor (501) is fixedly connected to the reciprocating threaded rod (3), several exhaust pipes (502) are fixedly installed on the front of the air box (2), an air outlet hollow box (503) is fixedly installed on the front of the detection box (1), the front ends of several exhaust pipes (502) communicate with the air outlet hollow box (503), an L-shaped air inlet pipe (505) is fixedly installed at the bottom of the air box (2), an air inlet groove (506) is formed on the front of the L-shaped air inlet pipe (505), a mounting plate (508) is fixedly installed in the detection box (1), a laser detector (509) is fixedly installed at the bottom of the mounting plate (508), a rectangular fixing frame (510) is fixedly installed in the detection box (1), a closing door (511) is hingedly installed on the front of the detection box (1), and a T-shaped plate (512) is slidably installed through the L-shaped air inlet pipe (505).

2. The LED display screen flatness detection device according to claim 1, characterized in that: A positioning mechanism (6) is arranged in the detection box (1), the positioning mechanism (6) includes a positioning plate (601) fixedly installed in the detection box (1), a rectangular rod (602) slidably penetrates through the positioning plate (601), a triangular plate (603) is fixedly installed at the top end of the rectangular rod (602), the triangular plate (603) penetrates through the rectangular fixing frame (510) and is slidably connected to the rectangular fixing frame (510), a positioning spring (604) is sleeved on the rectangular rod (602), the top end of the positioning spring (604) is fixedly connected to the rectangular fixing frame (510), the bottom end of the positioning spring (604) is fixedly connected to the positioning plate (601), two limiting rods (605) are fixedly installed in the detection box (1), and both of the two limiting rods (605) penetrate through the positioning plate (601) and are slidably connected to the positioning plate (601).

3. The LED display screen flatness detection device according to claim 2, characterized in that: A connecting rod (606) is hingedly installed on the back of the positioning plate (601), the end of the connecting rod (606) is hingedly installed with a U-shaped sliding rod (607), the U-shaped sliding rod (607) is slidably connected to the detection box (1), a positioning push plate (608) is fixedly installed at the end of the U-shaped sliding rod (607), the positioning push plate (608) is adapted to the rectangular fixing frame (510), several clamping springs (609) are fixedly installed at the end of the positioning push plate (608), and the ends of several clamping springs (609) are fixedly connected to the detection box (1).

4. The LED display screen flatness detection device according to claim 1, characterized in that: A sealing mechanism (7) is provided on the detection box (1). The sealing mechanism (7) includes a first cavity (701) and a second cavity (702) opened in the air outlet hollow box (503). The first cavity (701) communicates with the second cavity (702). A perforated T-shaped hollow ring plate one (703) is slidably installed in the second cavity (702). A first sealing spring (704) is fixedly installed on the front inner wall of the perforated T-shaped hollow ring plate one (703). The end of the first sealing spring (704) is fixedly connected to the air outlet hollow box (503).

5. The LED display screen flatness detection device according to claim 1, characterized in that: An air inlet hollow box (707) is fixedly installed on the back of the detection box (1). A third cavity (708) and a fourth cavity (709) are opened in the air inlet hollow box (707). A perforated T-shaped hollow ring plate two (710) is slidably installed in the third cavity (708). A second sealing spring (711) is fixedly installed on the front inner wall of the perforated T-shaped hollow ring plate two (710). The end of the second sealing spring (711) is fixedly connected to the air inlet hollow box (707).

6. The LED display screen flatness detection device according to claim 5, characterized in that: The end of the reciprocating threaded rod (3) penetrates through the air inlet hollow box (707) and is rotatably connected to the air inlet hollow box (707). The right end of the L-shaped air inlet pipe (505) communicates with the fourth cavity (709). A plurality of cleaning plates (712) are fixedly installed on the outer wall of the reciprocating threaded rod (3). The fronts of the plurality of cleaning plates (712) are all in contact with the air inlet hollow box (707).

7. The LED display screen flatness detection device according to claim 1, characterized in that: A dust discharging mechanism (8) is provided on the reciprocating threaded rod (3). The dust discharging mechanism (8) includes an internally threaded plate (801) threadedly sleeved on the reciprocating threaded rod (3). An L-shaped sliding rod (802) is fixedly installed on the top of the internally threaded plate (801). The L-shaped sliding rod (802) penetrates through the air outlet hollow box (503) and is slidably connected to the air outlet hollow box (503) and the detection box (1). A T-shaped contact plate (803) is fixedly installed at the front end of the L-shaped sliding rod (802).

8. The LED display screen flatness detection device according to claim 7, characterized in that: A T-shaped adaptor plate (804) is fixedly installed on the front of the air outlet hollow box (503). A U-shaped sliding plate (805) is slidably sleeved on the T-shaped adaptor plate (804). A dust discharging spring (806) is sleeved on the T-shaped adaptor plate (804). The top end of the dust discharging spring (806) is fixedly connected to the T-shaped adaptor plate (804). The bottom end of the T-shaped contact plate (803) is fixedly connected to the U-shaped sliding plate (805). The bottom end of the U-shaped sliding plate (805) extends into the air outlet hollow box (503) and is slidably connected to the air outlet hollow box (503). An L-shaped movable plate (807) is fixedly installed on the front of the U-shaped sliding plate (805). L-shaped fixing plates (808) are fixedly installed on the left side and the right side of the L-shaped movable plate (807) respectively. The bottom ends of the two L-shaped fixing plates (808) both extend into the detection box (1) and are both slidably connected to the detection box (1). The sides of the two L-shaped fixing plates (808) close to each other are both fixedly connected to the T-shaped plate (512).

Images