Touch screen flatness detection equipment

Abstract

The invention belongs to the technical field of laser detection, and particularly relates to touch screen flatness detection equipment which comprises a base and an L-shaped supporting frame fixedly arranged at the top of the base, and further comprises a moving mechanism arranged at the top of the L-shaped supporting frame, a first air cylinder is arranged at the bottom of the moving mechanism, and a laser detector is fixedly arranged at the moving end of the first air cylinder; and the annular positioning seat is fixedly arranged at the top of the base, and an annular auxiliary touch screen is detachably arranged at the top of the annular positioning seat. The to-be-detected touch screen is ensured to be horizontally placed through the annular positioning seat, and the annular auxiliary touch screen makes up the defect of an edge structure so as to avoid abnormity of a laser detection signal; the lifting mechanism is matched with the dust removal mechanism to clean dust on the surface and accurately control the height, the alignment degree detection mechanism and the lifting mechanism cooperatively adjust the alignment degree of the touch screen to be detected and the annular auxiliary touch screen, the problems that edge detection data of the touch screen is missing and accuracy is insufficient are effectively solved, and the accuracy and stability of flatness detection are improved.

Description

Technical Field

[0001] This invention belongs to the field of laser detection technology, and in particular relates to a touch screen flatness detection device. Background Technology

[0002] In the manufacturing process of touch screens, flatness is one of the key indicators for measuring their quality, which directly affects the subsequent assembly accuracy and performance. To meet the requirements of high-precision testing, most of the current mainstream flatness testing equipment adopts laser testing technology, which can accurately capture the minute unevenness changes on the surface by analyzing the reflection signal of the laser beam on the touch screen surface, thereby realizing the evaluation of flatness, such as the touch screen flatness testing equipment disclosed in announcement number CN108955585A. However, in actual testing, due to sudden structural gaps at the edges of the touchscreen, such as edge truncation, untransitioned boundaries, or discontinuous connections with surrounding structures, the reflection path changes abnormally when the laser beam illuminates the area. Some reflected light may be misjudged by the detection system as a flatness error of the surface itself due to angular deviations. At the same time, sudden gaps at the edges may also form shadows, blocking the laser beam and preventing the reflection signal in that area from being effectively captured, resulting in missing detection data. This leads to deviations in the flatness assessment of the edge area, which in turn affects the accurate judgment of the overall flatness of the touchscreen, becoming a significant factor restricting the performance improvement of testing equipment.

[0003] To address this, a touchscreen flatness testing device is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a touchscreen flatness testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a touch screen flatness detection device, comprising a base and an L-shaped support frame fixedly disposed on the top of the base, and further comprising: A moving mechanism is provided on the top of the L-shaped support frame. A first cylinder is provided at the bottom of the moving mechanism, and a laser detector is fixedly provided at the moving end of the first cylinder. An annular positioning seat is fixedly installed on the top of the base. An annular auxiliary touch screen is detachably provided on the top of the annular positioning seat. The cooperation between the annular positioning seat and the annular auxiliary touch screen positions and installs the touch screen to be tested, and the annular auxiliary touch screen can compensate for edge defects of the touch screen to be tested. A lifting mechanism is provided on the top of the base and is located inside the annular positioning seat. The lifting mechanism is used to support the touch screen to be tested. A dust removal mechanism is located on the top of the base, and both the air outlet and air inlet of the dust removal mechanism are connected to the side wall of the annular positioning seat. Two alignment detection mechanisms are respectively disposed on both sides of the annular positioning seat, and the alignment detection mechanisms are used to detect the surface alignment of the annular auxiliary touch screen and the touch screen to be tested; The PLC controller is fixedly mounted on the side wall of the L-shaped support frame. The moving mechanism, the first cylinder, the lifting mechanism, the dust removal mechanism, and the alignment detection mechanism are all electrically connected to the PLC controller.

[0006] Preferably, the moving mechanism includes two longitudinal slide rails fixedly disposed on the top of the L-shaped support frame, and a transverse slide rail is fixedly disposed between the sliders of the two longitudinal slide rails, with the bottom of the slider of the transverse slide rail fixedly connected to the first cylinder.

[0007] Preferably, the lifting mechanism includes a lifting support plate located inside the annular positioning seat, a second cylinder is fixedly provided at the center of the lower surface of the lifting support plate, and the second cylinder is fixedly provided at the top of the base, and telescopic rods are fixedly provided between the four corners of the lower surface of the lifting support plate and the top of the base.

[0008] Preferably, the dust removal mechanism includes a dust collection box fixedly installed on one side of the top of the base. The dust collection box has an air suction pipe and an air outlet pipe fixedly installed on both sides. The annular positioning seat has air chambers inside both sides. One end of the air suction pipe and one end of the air outlet pipe are respectively connected to the two air chambers. The inner walls of both sides of the annular positioning seat are provided with air suction holes and air outlet holes that are connected to the two air chambers.

[0009] Preferably, the dust collection box includes a box body fixedly installed on the top of the base, the suction pipe and the exhaust pipe are respectively fixedly connected to the two sides of the box body, the inside of the box body is fixedly provided with a fixing plate and an activated carbon filter, the inside of the fixing plate is fixedly provided with a fan, and the outer wall of the box body is fixedly provided with a mounting plate fixedly connected to the activated carbon filter.

[0010] Preferably, the alignment detection mechanism includes a support plate fixedly mounted on the side wall of the annular positioning seat, a third cylinder fixedly mounted on the side wall of the support plate, a detection fixing sleeve fixedly mounted on the moving end of the third cylinder, a detection slide rod slidably mounted inside the detection fixing sleeve, a detection housing fixedly mounted on the side wall of the detection fixing sleeve, a resistance rod vertically fixedly mounted inside the detection housing, a conductive ring slidably mounted on the wall of the resistance rod, and an insulating connecting rod fixedly mounted between the side wall of the conductive ring and the detection slide rod.

[0011] Preferably, a hemispherical rubber head is fixedly provided at the lower end of the detection slide rod, and limiting strips are fixedly provided on both sides of the rod wall of the detection slide rod. A limiting groove that cooperates with the limiting strip is provided on the inner side wall of the detection fixing sleeve.

[0012] Preferably, two mounting rings are symmetrically fixed on both sides of the annular auxiliary touch screen, and the interior of the mounting rings is provided with mounting bolts that are threadedly connected to the annular positioning seat.

[0013] Compared with existing technologies, the advantages of this invention are as follows: 1. Through the setting of the annular positioning seat and the annular auxiliary touch screen, the annular positioning seat can slide to contact the side wall of the touch screen under test through its inner side wall, forming a four-sided constraint to ensure that the touch screen under test is always placed in a horizontal state, providing a stable reference posture for subsequent testing; while the annular auxiliary touch screen at the top of the annular positioning seat can form a continuous transition surface with the edge of the touch screen under test, making up for the detection defects caused by sudden structural loss (such as truncation, discontinuous connection) at the edge of the touch screen under test, avoiding data loss caused by abnormal reflection or shadow occlusion when the laser irradiates the edge, and improving the reliability of the flatness detection of the edge area.

[0014] 2. Through the set lifting mechanism and dust removal mechanism, the lifting mechanism can slowly raise the touch screen to be tested. When it passes between the air intake and exhaust ports of the dust removal mechanism, the airflow circulation formed by the dust removal mechanism can efficiently peel off and filter the dust on the surface of the touch screen to be tested, so as to avoid dust adhesion affecting the accuracy of the laser reflection signal. At the same time, the lifting mechanism can precisely control the rising height of the touch screen to be tested, providing a basis for its alignment with the ring auxiliary touch screen, reducing the interference of external factors on the detection accuracy from both pre-processing and positioning aspects.

[0015] 3. Through the set lifting mechanism and alignment detection mechanism, the alignment detection mechanism can accurately identify the height difference between the touch screen to be tested and the ring auxiliary touch screen by detecting the movement of the sliding rod. Then, by controlling the lifting mechanism to perform closed-loop adjustment, it ensures that the surface of the touch screen to be tested and the surface of the ring auxiliary touch screen are flush, avoiding the interference of poor edge alignment on the laser detection benchmark. Combined with the compensation of the edge structure by the ring auxiliary touch screen, the accuracy of the overall flatness assessment is effectively improved. Attached Figure Description

[0016] Figure 1 This is a first-view perspective perspective of a touchscreen flatness detection device provided by the present invention; Figure 2 This is a second-view perspective perspective of a touchscreen flatness detection device provided by the present invention; Figure 3 This is a perspective view of a touch screen flatness detection device base, annular positioning seat, and annular auxiliary touch screen connection provided by the present invention. Figure 4 This is a perspective view of the base, annular positioning seat, and annular auxiliary touch screen of a touch screen flatness detection device provided by the present invention after being cut open; Figure 5 This is a perspective view of the dust removal mechanism of a touch screen flatness detection device provided by the present invention; Figure 6 This is a perspective view of an alignment detection mechanism for a touchscreen flatness detection device provided by the present invention.

[0017] In the diagram: 1. Base, 2. L-shaped support frame, 3. Moving mechanism, 31. Longitudinal slide rail, 32. Transverse slide rail, 4. First cylinder, 5. Laser detector, 6. Circular positioning seat, 7. Circular auxiliary touch screen, 8. Lifting mechanism, 81. Lifting pallet, 82. Second cylinder, 83. Telescopic rod, 9. Dust removal mechanism, 91. Dust collection box, 92. Suction pipe, 93. Exhaust pipe, 94. Air chamber, 95. Suction hole, 96. Exhaust hole, 911. Housing, 912. Fixing plate, 913. Activated carbon filter, 914. Fan, 915. Mounting plate, 10. Alignment detection mechanism, 101. Support plate, 102. Third cylinder, 103. Detection fixing sleeve, 104. Detection slide rod, 105. Detection housing, 106. Resistance rod, 107. Conductive ring, 108. Insulating connecting rod, 109. Limiting strip, 11. PLC controller, 12. Mounting ring, 13. Mounting bolt. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] like Figures 1-6 As shown, a touch screen flatness testing device includes a base 1 and an L-shaped support frame 2 fixedly mounted on the top of the base 1, and further includes: The moving mechanism 3 is located on the top of the L-shaped support frame 2. The bottom of the moving mechanism 3 is equipped with a first cylinder 4, and the moving end of the first cylinder 4 is fixedly equipped with a laser detector 5. The moving mechanism 3 includes two longitudinal slide rails 31 fixedly installed on the top of the L-shaped support frame 2. A transverse slide rail 32 is fixedly installed between the sliders of the two longitudinal slide rails 31. The bottom of the slider of the transverse slide rail 32 is fixedly connected to the first cylinder 4. The longitudinal slide rails 31 can drive the transverse slide rail 32 to move longitudinally, and the transverse slide rail 32 can drive the first cylinder 4 to move laterally, thereby driving the first cylinder 4 and the laser detector 5 at its moving end to move in multiple directions.

[0020] An annular positioning seat 6 is fixedly mounted on the top of the base 1. An annular auxiliary touch screen 7 is detachably mounted on the top of the annular positioning seat 6. The cooperation between the annular positioning seat 6 and the annular auxiliary touch screen 7 positions and installs the touch screen to be tested. The annular auxiliary touch screen 7 can compensate for edge defects of the touch screen to be tested. The annular auxiliary touch screen 7 is made of the same material as the touch screen to be tested. Two mounting rings 12 are symmetrically fixed on both sides of the annular auxiliary touch screen 7. The mounting rings 12 have mounting bolts 13 that are threadedly connected to the annular positioning seat 6 inside. By loosening the mounting bolts 13 with a wrench, the fixing between the mounting rings 12 and the annular positioning seat 6 is released, so that the annular auxiliary touch screen 7 can be disassembled for maintenance. A lifting mechanism 8 is located on the top of the base 1 and inside the annular positioning seat 6. The lifting mechanism 8 is used to lift the touch screen to be tested. The lifting mechanism 8 includes a lifting plate 81 located inside the annular positioning seat 6. A second cylinder 82 is fixedly installed at the center of the lower surface of the lifting plate 81 and is fixedly installed on the top of the base 1. The second cylinder 82 is a high-precision cylinder that can accurately control the up and down movement of the lifting plate 81. Telescopic rods 83 are fixedly installed between the four corners of the lower surface of the lifting plate 81 and the top of the base 1. The telescopic rods 83 can play an auxiliary stabilizing role for the lifting plate 81. As the lifting plate 81 rises or falls, the telescopic rods 83 will extend or shorten.

[0021] A dust removal mechanism 9 is located on the top of the base 1, and both the air outlet and air inlet of the dust removal mechanism 9 are connected to the side wall of the annular positioning seat 6. The dust removal mechanism 9 includes a dust collection box 91 fixedly installed on one side of the top of the base 1. A suction pipe 92 and an air outlet pipe 93 are fixedly installed on both sides of the dust collection box 91. Air chambers 94 are provided inside both sides of the annular positioning seat 6. One end of the suction pipe 92 and one end of the air outlet pipe 93 are respectively connected to the two air chambers 94. Suction holes 95 and air outlet holes 96 communicating with the two air chambers 94 are opened on the inner walls of both sides of the annular positioning seat 6. The number and position of the suction holes 95 and air outlet holes 96 are the same. The dust collection box 91 includes a fixed... A housing 911 is fixedly installed on the top of the base 1. An air intake pipe 92 and an air outlet pipe 93 are fixedly connected to the two sides of the housing 911 respectively. A fixing plate 912 and an activated carbon filter 913 are fixedly installed inside the housing 911. A fan 914 is fixedly installed inside the fixing plate 912. An installation plate 915 is fixedly installed on the outer wall of the housing 911 and is fixedly connected to the activated carbon filter 913. The installation plate 915 is magnetically connected to the housing 911. When the activated carbon filter 913 needs to be maintained, the operator can apply external force to the installation plate 915 to remove the activated carbon filter 913 from the inside of the housing 911.

[0022] Two alignment detection mechanisms 10 are respectively disposed on both sides of the annular positioning seat 6, and the alignment detection mechanism 10 is used to detect the surface alignment of the annular auxiliary touch screen 7 and the touch screen to be tested. The alignment detection mechanism 10 includes a support plate 101 fixedly disposed on the side wall of the annular positioning seat 6, a third cylinder 102 fixedly disposed on the side wall of the support plate 101, a detection fixing sleeve 103 fixedly disposed on the moving end of the third cylinder 102, a detection slide rod 104 slidably disposed inside the detection fixing sleeve 103, a detection housing 105 fixedly disposed on the side wall of the detection fixing sleeve 103, a resistance rod 106 vertically fixedly disposed inside the detection housing 105, a conductive ring 107 slidably disposed on the rod wall of the resistance rod 106, and an insulating connecting rod 108 fixedly disposed between the side wall of the conductive ring 107 and the detection slide rod 104. When the sliding rod 104 is pushed upward, it can drive the conductive ring 107 to move on the resistor rod 106, thereby reducing the length of the resistor rod 106 connected in the circuit. The lower end of the sliding rod 104 is fixed with a hemispherical rubber head, which can prevent the lower end of the sliding rod 104 from directly contacting the ring auxiliary touch screen 7 and the touch screen under test, thus protecting the ring auxiliary touch screen 7 and the touch screen under test. Limiting strips 109 are fixed on both sides of the rod wall of the sliding rod 104. The inner side wall of the detection fixing sleeve 103 is provided with a limiting groove that cooperates with the limiting strip 109. When the sliding rod 104 moves inside the detection fixing sleeve 103, the limiting strip 109 can slide inside the limiting groove, thereby preventing the sliding rod 104 from rotating inside the detection fixing sleeve 103.

[0023] The PLC controller 11 is fixedly mounted on the side wall of the L-shaped support frame 2. The moving mechanism 3, the first cylinder 4, the lifting mechanism 8, the dust removal mechanism 9, and the alignment detection mechanism 10 are all electrically connected to the PLC controller 11.

[0024] The operating principle of the present invention is described as follows: The operator first places the touch screen to be tested into the annular positioning seat 6. At this time, the lifting plate 81 is in the state of being lowered to the bottom. After the touch screen to be tested is placed in, it naturally falls into the lowest position inside the annular positioning seat 6 (the sliding contact constraint of the inner sidewalls of the annular positioning seat 6 with the sidewalls of the touch screen to be tested ensures that the touch screen to be tested is always placed in a horizontal state). The height of the upper surface of the touch screen to be tested is lower than the height of the air intake hole 95 and the air outlet hole 96. Then, the power supply of the device is turned on. The operator manually operates the PLC controller 11 to simultaneously start the fan 914 and the second cylinder 82. When the fan 914 runs, it extracts gas from the housing 911, the suction pipe 92, and the corresponding air chamber 94, while simultaneously discharging this gas into the exhaust pipe 93 and the corresponding air chamber 94. At this time, the suction hole 95 and the exhaust hole 96 on the inner side of the annular positioning seat 6 are in a relative state, forming an airflow circulation path. As the moving end of the second cylinder 82 slowly extends, the lifting plate 81 drives the touch screen to be tested on its upper surface to rise slowly and synchronously. When the touch screen to be tested passes between the suction hole 95 and the exhaust hole 96... Under negative pressure, the suction port 95 adsorbs the dust on the surface of the touch screen to be tested, while the exhaust port 96 blows out the gas delivered by the housing 911. With the cooperation of the two, the airflow can flow along the surface of the touch screen to be tested, peel off the dust attached to the surface of the touch screen to be tested and bring it into the suction port 95. After the dust-carrying gas enters the housing 911, it will pass through the activated carbon filter 913. The dust is intercepted and filtered by the filter. The filtered clean gas is delivered to the exhaust port 96 through the exhaust pipe 93 and blown towards the surface of the touch screen to be tested during the rising process, realizing the recycling of gas and continuously completing the surface cleaning. After the dust is cleaned, the moving end of the second cylinder 82 continues to extend, driving the touch screen under test to rise continuously. Since the height to which the touch screen under test is raised by the second cylinder 82 is fixed, when it rises to the preset position, the upper surface of the touch screen under test can automatically be aligned with the upper surface of the ring auxiliary touch screen 7. At this time, the PLC controller 11 controls the second cylinder 82 and the fan 914 to stop working. Subsequently, the staff activated the third cylinders 102 on both sides through the PLC controller 11. The moving end of the third cylinder 102 extended, pushing the detection fixing sleeve 103 and the detection slide rod 104 inside to move synchronously. This caused the hemispherical rubber head at the lower end of the detection slide rod 104 to move from the upper surface of the ring auxiliary touch screen 7 (the hemispherical rubber head is made of the same rubber material as the tip of the stylus, which is soft and elastic, and has a smooth surface, so it will not scratch the touch screen to be tested and the ring auxiliary touch screen 7). It passed through the splicing gap between the touch screen to be tested and the ring auxiliary touch screen 7 until it moved to the upper surface of the touch screen to be tested. The impact of the splicing gap is smaller than the impact of the edge cut-off, the boundary without transition, or the discontinuous connection with the surrounding structure of the touch screen to be tested, and has a smaller impact on the subsequent laser detection. When there are no morphological defects at the bottom of the touch screen to be tested, there is no height difference between it and the ring auxiliary touch screen 7. When the hemispherical rubber head moves on the surface of the smoothly transitioned splicing gap, it will not exert an upward pushing force on the detection slide bar 104. At this time, the alignment detection mechanism 10 determines that the upper surfaces of the two screens are flush and controls the third cylinder 102 to retract, so that the lower end of the detection slide bar 104 moves away from the surface of the touch screen to be tested. If there is a local protrusion defect at the bottom of the touch screen to be tested, such as stress deformation caused by uneven material, the protrusion will increase the overall placement height of the touch screen to be tested (since the four sides of the touch screen to be tested are already horizontally limited by the inner wall of the ring auxiliary touch screen 7, as long as there is a local protrusion at the bottom of the touch screen to be tested, the height of the touch screen to be tested placed inside the ring auxiliary touch screen 7 will increase). This will cause its upper surface to be higher than the upper surface of the ring auxiliary touch screen 7 after it rises. When the hemispherical rubber head passes through the splicing gap, it will be squeezed upward due to the step created by the height difference, pushing the detection slide rod 104 to slide upward in the detection fixing sleeve 103. Since the insulating connecting rod 108 is rigidly connected to the detection slide rod 104, the conductive ring 107 moves upward accordingly, shortening the effective length of the resistor rod 106 connected to the circuit. According to Ohm's law, the decrease in the total resistance of the circuit will lead to an increase in the current. At this time, the measuring circuit collects the current change signal at both ends of the resistor rod 106, and transmits it to the PLC controller 11 after filtering and amplification. The PLC controller 11 triggers closed-loop regulation based on current change: The device presets the resistance of the resistor rod 106 to be 100Ω / mm per unit length, and the circuit power supply voltage is constant at 10V. In the initial state, the resistance of the resistor rod 106 connected to the circuit is 1000Ω, and the corresponding loop current is 0.01A. When there is a height difference in the touch screen to be tested, the detection slider 104 drives the conductive ring 107 to move upward, which shortens the length of the resistor rod 106 connected to the circuit, reduces the resistance, and increases the current accordingly. For example, if the detected current increases from 0.01A to 0.012A, calculations show that the resistance of the resistor rod 106 connected to the circuit drops to approximately 833Ω, and the connection length shortens by 1.67mm. This indicates that the upper surface of the touchscreen under test is 1.67mm higher than the ring-shaped auxiliary touchscreen 7. At this time, the PLC controller 11 immediately sends an adjustment command to the second cylinder 82 based on the correspondence between this current change and the height difference, controlling its piston rod to precisely retract by 1.67mm, thereby driving the lifting platform 81 and the touchscreen under test to move down synchronously. During the adjustment process, as the touchscreen under test moves down... As the detection slider 104 is no longer pushed by the height difference, it gradually falls back under its own gravity or the action of the reset mechanism. The conductive ring 107 moves down synchronously on the resistor rod 106, the resistance length connected to the circuit gradually recovers, and the circuit current also gradually decreases. When the current stabilizes again within the preset threshold range of 0.01A, it indicates that the upper surface of the touch screen to be tested has been re-aligned with the upper surface of the ring auxiliary touch screen 7. The PLC controller 11 then controls the second cylinder 82 to stop its operation and controls the third cylinder 102 to retract, so that the lower end of the detection slider 104 moves away from the surface of the touch screen to be tested. After the alignment test between the touchscreen under test and the ring-shaped auxiliary touchscreen 7 is completed, the operator operates the PLC controller 11 to start the first cylinder 4. The moving end of the first cylinder 4 extends, driving the laser detector 5 to approach the upper surface of the touchscreen under test until it reaches the preset detection distance. At the same time, the laser detector 5, the vertical slide rail 31, and the horizontal slide rail 32 are activated. The vertical slide rail 31 and the horizontal slide rail 32 work together to drive the laser detector 5 to perform a full-range scan on the upper surface of the touchscreen under test, thereby completing the flatness test. The laser beam emitted by the laser emitter inside the laser detector 5... The laser beam is shone at a fixed angle onto the surface of the touchscreen to be tested. After some of the laser is reflected by the surface, it is received by the laser receiver inside the laser detector 5. If there are unevenness on the surface of the touchscreen to be tested, the reflection angle of the laser will change, causing the position of the light spot received by the laser receiver to shift. By calculating this shift, the unevenness of the corresponding position on the surface of the touchscreen to be tested can be obtained, thereby realizing the detection of the flatness of the upper surface of the entire touchscreen to be tested. The laser detector 5 then feeds back the detection results to the PLC controller 11, and displays them to the staff on the display of the PLC controller 11. When the laser detector 5 moves to the edge of the touchscreen to be tested, the ring-shaped auxiliary touchscreen 7 can compensate for the edge defects of the touchscreen to be tested. This is because the edge of the touchscreen to be tested may have structural discontinuities, such as sudden cut-offs, which can easily cause abnormal reflection of the laser in that area, affecting the accuracy of the test. The ring-shaped auxiliary touchscreen 7 connects with the edge of the touchscreen to be tested, forming a continuous and flat transition surface. When the laser shines on this area, the reflection path is stable and will not produce abnormal reflections due to the edge defects of the touchscreen itself. This allows the laser detector 5 to still obtain a stable and effective reflection signal when scanning the edge area, ensuring the reliability of the edge flatness test and improving the accuracy of the test. After the test is completed, the staff will operate the PLC controller 11 again to control the laser detector 5 to return to its original position. At the same time, the staff will control the second cylinder 82 to extend, so that the second cylinder 82 will drive the lifting plate 81 and the touch screen to be tested on its surface to move upward until the touch screen to be tested moves out of the inside of the annular positioning seat 6. At this time, it is convenient for the staff to directly remove the touch screen to be tested.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A touchscreen flatness testing device, comprising a base (1) and an L-shaped support frame (2) fixedly disposed on the top of the base (1), characterized in that, Also includes: The moving mechanism (3) is located on the top of the L-shaped support frame (2). The bottom of the moving mechanism (3) is provided with a first cylinder (4), and the moving end of the first cylinder (4) is fixedly provided with a laser detector (5). A ring-shaped positioning seat (6) is fixedly installed on the top of the base (1). A ring-shaped auxiliary touch screen (7) is detachably provided on the top of the ring-shaped positioning seat (6). The cooperation between the ring-shaped positioning seat (6) and the ring-shaped auxiliary touch screen (7) positions and installs the touch screen to be tested. The ring-shaped auxiliary touch screen (7) can compensate for the edge defects of the touch screen to be tested. A lifting mechanism (8) is provided on the top of the base (1) and is located inside the annular positioning seat (6). The lifting mechanism (8) is used to lift the touch screen to be tested. The dust removal mechanism (9) is located on the top of the base (1), and the air outlet and air inlet of the dust removal mechanism (9) are connected to the side wall of the annular positioning seat (6). Two alignment detection mechanisms (10) are respectively disposed on both sides of the annular positioning seat (6), and the alignment detection mechanism (10) is used to detect the surface alignment of the annular auxiliary touch screen (7) and the touch screen to be tested; The PLC controller (11) is fixedly installed on the side wall of the L-shaped support frame (2). The moving mechanism (3), the first cylinder (4), the lifting mechanism (8), the dust removal mechanism (9) and the alignment detection mechanism (10) are all electrically connected to the PLC controller (11).

2. The touchscreen flatness testing device according to claim 1, characterized in that, The moving mechanism (3) includes two longitudinal slide rails (31) fixedly installed on the top of the L-shaped support frame (2), and a transverse slide rail (32) is fixedly provided between the sliders of the two longitudinal slide rails (31). The bottom of the slider of the transverse slide rail (32) is fixedly connected to the first cylinder (4).

3. The touchscreen flatness testing device according to claim 1, characterized in that, The lifting mechanism (8) includes a lifting plate (81) located inside the annular positioning seat (6). A second cylinder (82) is fixedly provided at the center of the lower surface of the lifting plate (81), and the second cylinder (82) is fixedly provided at the top of the base (1). Telescopic rods (83) are fixedly provided between the four corners of the lower surface of the lifting plate (81) and the top of the base (1).

4. The touchscreen flatness testing device according to claim 1, characterized in that, The dust removal mechanism (9) includes a dust collection box (91) fixedly installed on one side of the top of the base (1). The dust collection box (91) is fixedly provided with a suction pipe (92) and an exhaust pipe (93) on both sides. The annular positioning seat (6) is provided with air chambers (94) on both sides. One end of the suction pipe (92) and one end of the exhaust pipe (93) are respectively connected to the two air chambers (94). The inner walls of both sides of the annular positioning seat (6) are provided with suction holes (95) and exhaust holes (96) that are connected to the two air chambers (94).

5. The touchscreen flatness testing device according to claim 4, characterized in that, The dust collection box (91) includes a box body (911) fixedly installed on the top of the base (1), the suction pipe (92) and the exhaust pipe (93) are fixedly connected to the two sides of the box body (911) respectively, a fixing plate (912) and an activated carbon filter (913) are fixedly installed inside the box body (911), a fan (914) is fixedly installed inside the fixing plate (912), and an installation plate (915) fixedly connected to the activated carbon filter (913) is fixedly installed on the outer side wall of the box body (911).

6. The touchscreen flatness testing device according to claim 1, characterized in that, The alignment detection mechanism (10) includes a support plate (101) fixedly mounted on the side wall of the annular positioning seat (6). A third cylinder (102) is fixedly mounted on the side wall of the support plate (101). A detection fixing sleeve (103) is fixedly mounted on the moving end of the third cylinder (102). A detection slide rod (104) is slidably mounted inside the detection fixing sleeve (103). A detection housing (105) is fixedly mounted on the side wall of the detection fixing sleeve (103). A resistance rod (106) is vertically fixed inside the detection housing (105). A conductive ring (107) is slidably mounted on the wall of the resistance rod (106). An insulating connecting rod (108) is fixedly mounted between the side wall of the conductive ring (107) and the detection slide rod (104).

7. The touchscreen flatness testing device according to claim 6, characterized in that, The lower end of the detection slide rod (104) is fixedly provided with a hemispherical rubber head, and both sides of the rod wall of the detection slide rod (104) are fixedly provided with limiting strips (109). The inner side wall of the detection fixing sleeve (103) is provided with a limiting groove that cooperates with the limiting strips (109).

8. The touchscreen flatness testing device according to claim 1, characterized in that, The ring-shaped auxiliary touch screen (7) is symmetrically fixed with two mounting rings (12) on both sides, and the mounting rings (12) are provided with mounting bolts (13) that are threadedly connected to the ring positioning seat (6).

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