A backplane flatness detection device

Abstract

This utility model discloses a backplate flatness testing device, including a rotary table with a placement plane, a support plate disposed on the rotary table, the support plate having a support plane for adhering to the back of the backplate, a base having a mounting plane parallel to the base, an adjusting rod connected to the mounting plane, the adjusting rod being axially perpendicular to the mounting plane, a controllable movable sliding sleeve sleeved on the outside, a measuring rod disposed on the side of the sliding sleeve, a slot having a slot at the end of the measuring rod away from the sliding sleeve, an elastic element built into the slot, one end of the elastic element abutting against the inner wall of the slot, the other end being connected to a feeler gauge inserted into the slot, the feeler gauge having a measuring end, and the device also includes a controller connected to a torque sensor. This flatness testing device uses a torque sensor to provide real-time feedback on the contact state between the feeler gauge and the backplate, realizing controllable testing force, quantitative determination of contact gap, and data-driven testing results, thus improving the automation and accuracy of flatness testing.

Description

Technical Field

[0001] This utility model relates to a testing device, and more particularly to a backplate flatness testing device. Background Technology

[0002] In modern manufacturing and testing processes, backplanes (such as LCD backplanes and solar cell module backplanes) serve as critical load-bearing structures, and their flatness directly affects the accuracy and yield of subsequent bonding, welding, or assembly processes. Therefore, high-precision flatness testing of the backplane's back side is necessary before it leaves the factory. Especially in precision electronics manufacturing and high-reliability structural component processing scenarios, the flatness of the backplane directly relates to product consistency and functional stability; hence, related industries generally rely on manual or semi-automatic methods for testing.

[0003] Currently, conventional devices for testing the flatness of the back side of a backplate often employ a manual rotation mechanism in conjunction with a standard calibration plate. Specifically, the operator mounts the calibration plate on the manual rotation mechanism. The calibration plate itself has a highly flat material-bearing surface that meets specifications. During testing, the back side of the backplate to be tested is placed against the material-bearing surface. By manually rotating the calibration plate, the backplate is slowly rotated around its central axis. A feeler gauge is then manually inserted into the contact gap between the back side of the backplate and the calibration plate to determine if there is an insertable gap, thus evaluating the flatness.

[0004] However, while the aforementioned structure is simple in its operating principle, it suffers from problems such as reliance on manual judgment, unstable accuracy, low efficiency, and difficulty in real-time quantification and recording of test results. Specifically, the feeler gauge is operated manually, the testing process cannot be automatically quantified and recorded, and it is greatly affected by the operator's subjectivity and operational stability. Furthermore, the detection of contact gaps still relies on manual perception of the insertion state, lacking a real-time feedback mechanism, and making it impossible to accurately track and trace the detection accuracy. Therefore, there is an urgent need for a flatness testing device that can improve the reliability of the test. Utility Model Content

[0005] The purpose of this invention is to provide a backplate flatness detection device that can automatically determine the contact state and quantify it by combining torque feedback.

[0006] The technical solution adopted by this utility model to solve the above problems is: a backplate flatness detection device, comprising:

[0007] A rotary table, including a drive end for controlled rotation, the drive end including a placement plane;

[0008] A support plate is disposed at the placement plane. The support plate includes a support plane for placing the back plate and is in contact with the back of the back plate. The support plane is parallel to the placement plane.

[0009] The base includes a mounting surface parallel to the material-bearing surface;

[0010] A torque sensor is disposed at the mounting plane, and the torque sensor includes an input terminal;

[0011] An adjusting rod is connected to the input end, and the axis of the adjusting rod is perpendicular to the mounting plane;

[0012] A sliding sleeve is fitted over the outside of the adjusting rod and is controlled to move or remain stationary along the extension direction of the adjusting rod.

[0013] A measuring rod is disposed on the side of the sliding sleeve. The extension direction of the measuring rod is perpendicular to the extension direction of the adjusting rod, and a slot is provided at the end of the measuring rod away from the sliding sleeve along its own extension direction.

[0014] An elastic element is disposed in the slot, and one end of the elastic element abuts against the inner wall of the slot near the sliding sleeve side;

[0015] A feeler gauge, comprising a measuring end and an insertion end, the insertion end being inserted into the slot and connected to the other end of the elastic element, the measuring end extending to the outside of the measuring rod;

[0016] The controller is connected to the torque sensor to receive the detection value from the torque sensor.

[0017] When the detection device is in operation, the side of the feeler gauge closest to the base is coplanar with the material-bearing plane, and the measuring end of the feeler gauge abuts against the contact gap between the back of the back plate and the material-bearing plane.

[0018] Preferably, the side of the sliding sleeve is provided with a through threaded groove, and a locking knob is threadedly connected to the threaded groove. When the sliding sleeve is in a stationary state, one end of the locking knob abuts against the side of the adjusting rod.

[0019] Preferably, the back panel flatness detection device further includes a leveling mechanism, the leveling mechanism comprising:

[0020] An adjustment base includes a fixed plane for placing the rotary table;

[0021] Several adjustable feet are provided, each adjustable foot having a telescopic end and a fixed end. The fixed end of the adjustable foot is connected to the adjusting seat. The telescopic end is telescopically extended and retracted in a controlled manner, and the telescopic direction of the telescopic end is perpendicular to the fixed plane.

[0022] Preferably, the number of adjusting legs is three, and the three adjusting brackets are all located on the side of the adjusting seat away from the fixed plane, and the three adjusting brackets are arranged in a ring at equal intervals with the center of the fixed plane as the center.

[0023] Preferably, the side of the material support plate away from the rotary table has a protruding structure, and the side of the protruding structure away from the rotary table is the material support plane.

[0024] Preferably, the edge contour of the outer periphery of the protruding structure is the same as the edge contour of the outer periphery of the back plate, and the periphery of the back plate is perpendicular to the back surface of the back plate.

[0025] Preferably, the back panel flatness detection device further includes a positioning frame, the positioning frame including a through frame groove, the edge contour of the inner wall of the frame groove being the same as the edge contour of the outer periphery of the protruding structure, and when the positioning frame is fitted onto the protruding structure, the side of the positioning frame away from the rotary table is higher than the material bearing plane.

[0026] Preferably, the side of the adjusting rod is provided with scale marks.

[0027] Preferably, a groove is provided at the center of the material-bearing plane of the material-bearing plate, and a controlled electromagnetic component is provided in the groove to apply a magnetic attraction force to the back plate placed on the material-bearing plane when the detection device is in working state.

[0028] Beneficial effects of the embodiments of this utility model

[0029] 1. Because this utility model adopts a combination of adjusting rod, sliding sleeve, measuring rod, feeler gauge and elastic element, and obtains the force feedback signal when the feeler gauge contacts the back plate in real time through torque sensor, and cooperates with controller to receive and judge data, it effectively solves the problems of relying on manual insertion of feeler gauge for judgment, inconsistent detection force, unquantifiable contact state and no data recording of detection results in the prior art. Thus, it realizes high-precision automatic detection of the contact gap between the back plate and the material bearing plane, improves the data and traceability of the detection process, and objectively judges the detection results.

[0030] 2. Because this utility model adopts a leveling mechanism consisting of a fixed plane and multiple controllable telescopic adjustable legs, especially the three adjustable legs arranged in a ring at equal intervals with the center of the fixed plane as the center, it effectively solves the problems of difficulty in accurately controlling the levelness of the material bearing reference surface, reliance on manual adjustment, and unstable posture leading to detection errors in the prior art. Thus, it realizes high-precision leveling control of the entire rotary table, improves the stability and reliability of the material bearing plane as the detection reference surface, and ensures the consistency and accuracy of the flatness detection results. Attached Figure Description

[0031] Figure 1 This is a schematic structural diagram of a flatness detection device proposed in one embodiment of the present invention.

[0032] Figure 2 This is a schematic front sectional view of a flatness detection device proposed in one embodiment of the present invention.

[0033] Figure 3 This is a schematic structural diagram of a positioning frame sleeved on the outside of a protruding structure according to one embodiment of the present invention.

[0034] Figure 4 This is a schematic front sectional view of the positioning frame sleeved on the outside of the protruding structure according to one embodiment of the present invention.

[0035] Among them: 10, rotary table; 110, drive end; 120, placement plane; 20, material support plate; 210, protruding structure; 211, material support plane; 30, back plate; 40, base; 410, mounting plane; 50, torque sensor; 60, adjusting rod; 70, sliding sleeve; 80, measuring rod; 810, slot; 90, elastic element; 1000, feeler gauge; 1010, locking knob; 1020, leveling mechanism; 1021, adjusting seat; 1022, adjusting support foot; 1030, positioning frame. Detailed Implementation

[0036] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] Please see Figures 1 to 2 A preferred embodiment of this application discloses a device for detecting the flatness of an electronic screen back panel 30. The flatness detection device includes a rotary table 10, a support plate 20, a base 40, a torque sensor 50, an adjusting rod 60, a sliding sleeve 70, a measuring rod 80, an elastic element 90, a feeler gauge 1000, and a controller. Each component has a clear structure and a compact fit. The whole device is used to achieve high-precision detection of the contact gap between the back of the back panel 30 and the detection reference plane. The rotary table 10 includes a controllable rotating drive end 110, which includes a placement plane 120; a support plate 20 is disposed on the placement plane 120, which includes a support plane 211 for placing the back plate 30 and abutting against the back of the back plate 30, and the support plane 211 is parallel to the placement plane 120; a base 40 includes a mounting plane 410, which is parallel to the support plane 211; a torque sensor 50 is disposed on the mounting plane 410, and the torque sensor 50 includes an input end; an adjusting rod 60 is connected to the input end, and the axis of the adjusting rod 60 is perpendicular to the mounting plane 410; a sliding sleeve 70 is sleeved on the outside of the adjusting rod 60 and is controllable. The adjusting rod 60 moves or remains stationary along its extension direction; a measuring rod 80 is disposed on the side of the sliding sleeve 70, the extension direction of the measuring rod 80 is perpendicular to the extension direction of the adjusting rod 60, and a slot 810 is formed at the end of the measuring rod 80 away from the sliding sleeve 70 along its own extension direction; an elastic element 90 is disposed in the slot 810, one end of the elastic element 90 abuts against the inner wall of the slot 810 near the sliding sleeve 70; a feeler gauge 1000 includes a measuring end and an insertion end, the insertion end is inserted into the slot 810 and connected to the other end of the elastic element 90, and the measuring end extends to the outside of the measuring rod 80; the controller is connected to the torque sensor 50 to receive the detection value of the torque sensor 50. When the detection device is in operation, the side of the feeler gauge 1000 near the base 40 is coplanar with the material-bearing plane 211, and the measuring end of the feeler gauge 1000 abuts against the contact gap between the back of the back plate 30 and the material-bearing plane 211.

[0040] Specifically:

[0041] The rotary table 10 is located on the upper part of the device and includes a controllable rotating drive end 110. The drive end 110 rotates stably around the vertical central axis under the action of a control signal. A placement plane 120 is provided on it. The placement plane 120 has high machining precision and is used to support and position subsequent components.

[0042] The bottom of the support plate 20 is fixed to the placement plane 120 by a mechanical connection or fastening device to prevent it from shifting during the testing process. The upper surface of the support plate 20 is the support plane 211, which is used to directly adhere to the back panel 30 of the electronic screen to be tested. The support plane 211 is strictly parallel to the placement plane 120 of the rotary table 10 to ensure the consistency of the testing reference plane.

[0043] The base 40 serves as a stable support structure for the entire device, and has a mounting plane 410 on it. The mounting plane 410 is precision machined and structurally parallel to the material-bearing plane 211. The torque sensor 50 is fixedly mounted on the mounting plane 410, with its main body facing upwards, and has a reserved electrical interface for connection with the controller. The torque sensor 50 includes an upward-facing input terminal for receiving the axial force from the adjustment component and converting the force into an electrical signal output.

[0044] The bottom of the adjusting rod 60 is firmly connected to the input end, and its body extends vertically and is axially perpendicular to the mounting plane 410 to ensure stable guidance for the subsequent movement of the sliding sleeve 70 on it.

[0045] The sliding sleeve 70 is a hollow structure fitted around the adjusting rod 60. It can move up and down along the axis of the adjusting rod 60 under control commands, or remain stationary at a set position. Its outer wall is provided with guide rails or positioning grooves to improve positioning accuracy. The measuring rod 80 is mounted on the side wall of the sliding sleeve 70, extending laterally with its extension direction perpendicular to the extension direction of the adjusting rod 60, ensuring good lateral support for the feeler gauge 1000 during contact testing. The end of the measuring rod 80 furthest from the sliding sleeve 70 has a longitudinal slot 810. This slot 810 is a concave structure with a rectangular or wedge-shaped cross-section, facilitating the embedding of elastic components and enabling elastic adjustment.

[0046] The elastic element 90 is disposed inside the slot 810, with one end abutting against the inner wall of the slot 810 near the sliding sleeve 70, and the other end connected to the insertion end of the feeler gauge 1000. The elastic element 90 is preferably a helical compression spring made of spring steel wire or a flat shape memory alloy sheet, which has a stable restoring force and a moderate amount of deformation to ensure that the feeler gauge 1000 can provide a clear and controllable displacement torque signal when subjected to resistance.

[0047] The feeler gauge 1000 includes an insertion end and a measuring end. The insertion end is inserted into the slot 810 and reliably connected to the elastic element 90. The measuring end extends from the outside of the measuring rod 80 and, in the working state, contacts any gap that may exist between the back of the electronic backplate 30 and the material-bearing plane 211. The flatness of the part can be estimated by whether the measuring end can be inserted into the gap.

[0048] The controller is electrically connected to the torque sensor 50 via a signal line, enabling it to receive, analyze, and record sensor readings in real time. When the detection device enters the working state, the rotary table 10 slowly rotates, causing the back plate 30 to rotate around its center. The measuring end of the feeler gauge 1000 periodically contacts the back of the back plate 30 under the control of the sliding sleeve 70. If there is a gap in a certain part of the back plate 30, after the feeler gauge 1000 is inserted into the gap, it will experience a reaction force as the back plate 30 rotates. This reaction force acts on the adjusting rod 60 and is transmitted to the torque sensor 50, which converts it into an electrical signal and transmits it to the controller. After analyzing the torque change data, the controller can accurately determine whether the feeler gauge 1000 has been successfully inserted and the torque value it receives, thereby achieving a quantitative determination of the contact state.

[0049] This device is suitable for flatness inspection of the back panel 30 of electronic screens, and is particularly suitable for the manufacturing process of components such as LCD displays, glass substrates, or thin metal sheets where high flatness is required. It is suitable for use in cleanrooms or testing laboratories with relatively stable temperatures and minimal vibration. The equipment can be integrated into automated testing production lines or used as a standalone testing platform.

[0050] In this embodiment, the present invention employs a combined structure of adjusting rod 60, sliding sleeve 70, measuring rod 80, feeler gauge 1000, and elastic element 90. Furthermore, it uses torque sensor 50 to acquire the force feedback signal when the feeler gauge 1000 contacts the back plate 30 in real time, and coordinates with the controller for data reception and judgment. Therefore, it effectively solves the problems of relying on manual insertion of the feeler gauge 1000 for judgment, inconsistent detection force, unquantifiable contact state, and lack of data recording in the prior art. This achieves high-precision automatic detection of the contact gap between the back of the back plate 30 and the material-bearing plane 211, improves the datafication and traceability of the detection process, and ensures objective judgment of the detection results.

[0051] To ensure that the sliding sleeve 70 remains stably in the set position and to prevent positional shift due to external vibration or its own weight during the testing process, in some embodiments, please refer to... Figure 2 The sliding sleeve 70 has a through threaded groove on its side, which extends through the body of the sliding sleeve 70 along the wall thickness direction. A locking knob 1010 is threadedly connected to the threaded groove. One end of the locking knob 1010 abuts against the side of the adjusting rod 60 when the sliding sleeve 70 is in a stationary state.

[0052] Specifically:

[0053] The locking knob 1010 has an outer knob section and an inner abutment section. Its structure is usually made of metal and processed into a one-piece structure. The knob section is located on the outside of the slide sleeve 70, which is convenient for manual operation or automatic turning. The abutment section is located on the inside of the slide sleeve 70.

[0054] When the sliding sleeve 70 is stationary, tightening the locking knob 1010 causes its internal abutment section to pass through the threaded groove and extend inward, ultimately making direct contact with the outer wall side of the adjusting rod 60 to form a clamping force. This, through radial friction, stably locks the sliding sleeve 70 in its current position on the adjusting rod 60. This structure not only enables positioning and fixation at any height but also allows for manual fine-tuning of the knob before testing to ensure that the sliding sleeve 70, measuring rod 80, and feeler gauge 1000 assembly operate stably in the appropriate testing position.

[0055] This locking structure requires no additional electronic control components, is simple in structure, highly versatile, and easy to install. It can be widely adapted to adjusting rod 60 assemblies of various diameters and materials. Furthermore, after the inspection task is completed, simply loosening the locking knob 1010 counterclockwise releases the sliding sleeve 70 and restores its movable state along the axial direction of the adjusting rod 60, thus enabling highly repeatable inspection operations.

[0056] In practical applications, the device is suitable for inspecting flatness-sensitive components such as electronic devices and flat glass in indoor or semi-clean environments. It has moderate requirements for temperature and humidity, does not require a high-precision constant temperature control environment, and is also suitable as an auxiliary inspection unit outside the production line.

[0057] In this embodiment, because the present invention adopts a structure in which a through threaded groove is provided on the side of the sliding sleeve 70 and a locking knob 1010 is threadedly connected, the locking knob 1010 can reliably abut against the side of the adjusting rod 60 and achieve stable locking when the sliding sleeve 70 is stationary. Therefore, it effectively solves the problems of easy sliding of the sliding sleeve 70, unstable positioning of the feeler gauge 1000 during the detection process, and the influence of sliding interference on the detection accuracy in the prior art. Thus, it realizes the reliable holding of the sliding sleeve 70 at any height position, and improves the structural stability, operation convenience and consistency of the detection device and the detection data.

[0058] To improve the installation stability and operational accuracy of the overall testing device, please refer to the following embodiments: Figures 1 to 4The flatness detection device further includes a leveling mechanism 1020, which includes an adjusting base 1021 and several adjusting legs 1022. The adjusting base 1021 includes a fixed plane for placing the rotary table 10; the adjusting legs 1022 include a telescopic end and a fixed end, the fixed end of the adjusting legs 1022 is connected to the adjusting base 1021, the telescopic end extends and retracts in a controlled manner, and the extension and retraction direction of the telescopic end is perpendicular to the fixed plane.

[0059] Specifically:

[0060] The adjusting seat 1021 is a support platform with high structural strength and stability. Its upper surface is a fixed plane, which serves as the installation reference surface for the rotary table 10. This fixed plane is precision-machined, possessing excellent flatness and hardness to ensure high stability of the upper rotary table 10 during operation. The adjusting seat 1021 can be made of aluminum alloy, carbon steel, or composite materials, and the specific material can be flexibly selected according to the application scenario and the overall load-bearing requirements of the machine.

[0061] Several adjusting feet 1022 are disposed at the bottom of the adjusting base 1021. Each adjusting foot 1022 includes a fixed end and a telescopic end. The fixed end is rigidly connected to the adjusting base 1021 and is fixed by screws, slots 810, or welding, making the adjusting foot 1022 an extension support structure of the adjusting base 1021. The telescopic end is arranged vertically relative to the fixed end, and its telescopic direction is perpendicular to the fixed plane of the adjusting base 1021. In the implementation, the adjusting foot 1022 can be a fine-tuning screw, so that the fixed plane can be manually adjusted in conjunction with a frame level to achieve high-precision leveling.

[0062] The extension and retraction of each adjusting leg 1022 can be adjusted independently to adapt to initial conditions such as uneven ground or non-level device body. By adjusting the extension and retraction of three or more adjusting legs 1022, the entire adjusting base 1021 can be finely adjusted to achieve overall level correction of the fixed plane, thereby keeping the rotary table 10 in a strictly level working state.

[0063] During operation, the operator can finely adjust each adjusting foot 1022 based on the data fed back from the level instrument until the fixed plane of the adjusting seat 1021 reaches the expected level. After leveling, the rotary table 10, the material support plate 20, and the upper detection module all operate with the leveled fixed plane as the reference, thereby ensuring that the detection system completes the entire detection process under a highly consistent spatial reference.

[0064] This structure is suitable for places such as factories, experimental platforms, and testing workshops with slightly sloping ground or vibration disturbances. It is especially suitable for deployment in scenarios where multiple devices are calibrated together and higher requirements are placed on high-precision flatness testing.

[0065] In this embodiment, because the present invention employs a leveling mechanism 1020 consisting of an adjusting seat 1021 and several vertically controllable telescopic adjusting legs 1022, the rotary table 10 can achieve precise adjustment of its horizontal posture during the initial installation or testing process. Therefore, it effectively solves the problems of non-level initial installation of the testing device and accumulation of testing errors caused by the tilt of the material bearing surface in the prior art. This results in improved multi-scenario adaptability of the testing device, guaranteed levelness of the reference surface, and significant enhancement of testing stability and accuracy.

[0066] In order to achieve stable support and structural simplification of the leveling mechanism 1020, in a further embodiment, the number of the adjusting legs 1022 is three, and the three adjusting brackets are all arranged on the side of the adjusting seat 1021 away from the fixed plane, and the three adjusting brackets are arranged in a ring at equal intervals with the center of the fixed plane as the center.

[0067] Specifically:

[0068] The three adjusting legs 1022 are all independent structures, with their fixed ends firmly connected to the bottom of the adjusting base 1021, forming an equilateral supporting triangle layout on the bottom plane of the adjusting base 1021. This three-point support layout is simple in structure and has a clear mechanical support path. It can not only effectively distribute the self-weight of the detection device and the upper load, but also has good geometric stability, which is conducive to forming a unique and definite supporting plane and avoiding structural deformation or stress concentration problems caused by over-constraint.

[0069] The telescopic ends of each adjusting leg 1022 are designed as controllable structures, enabling targeted height fine-tuning in different mounting environments. Since the three adjusting legs 1022 are distributed at equal angles along a circular trajectory, during actual leveling, only three points need to be adjusted independently to efficiently correct the tilt angle of the fixed plane of the adjusting seat 1021, ensuring it accurately returns to a horizontal state and providing a highly reliable horizontal reference benchmark for the upper rotary table 10 and the support plate 20.

[0070] In this embodiment, the present invention adopts a three-point support arrangement structure with the center of the adjustment seat 1021 as the center and three adjustment legs 1022 equally spaced in a ring. This forms a stable triangular support system among the adjustment legs 1022. Therefore, it effectively solves the problems of complex adjustment of multi-support structures, low efficiency of the leveling process, and the influence of structural non-uniformity on the leveling accuracy in the prior art. As a result, it achieves the technical effect of high overall support stability of the detection device, fast and efficient leveling process, and accurate and reliable results.

[0071] To improve the contact accuracy of the contact gap between the measuring end of the feeler gauge 1000 and the back surface of the back plate 30 and the material-bearing plane 211, and to ensure reliable positioning and stable fit of the back plate 30, in some embodiments, please refer to... Figure 2 and Figure 4 The material support plate 20 has a protruding structure 210 on the side away from the rotary table 10, and the side of the protruding structure 210 away from the rotary table 10 is the material support plane 211. The outer peripheral edge contour of the protruding structure 210 is the same as the outer peripheral edge contour of the back plate 30, and the peripheral side of the back plate 30 is perpendicular to the back surface of the back plate 30.

[0072] Specifically:

[0073] The protruding structure 210 is integrally formed on the main body of the support plate 20. Its overall structure extends outward from the surface of the support plate 20 substrate, forming a partially protruding platform. The top surface of the protruding structure 210 is the high-precision machined support plane 211, whose surface has undergone flatness control treatment, enabling it to achieve surface contact and adhesion with the back of the electronic screen back panel 30. The material of the protruding structure 210 can be high-strength aluminum alloy or high-polymer wear-resistant material, possessing good rigidity and dimensional stability.

[0074] To ensure rapid positioning of the backplate 30 during placement and to avoid boundary drift or rotational errors, the outer peripheral edge contour of the protruding structure 210 is strictly consistent with the outer peripheral edge contour of the backplate 30 to be tested. This contour can be customized for specific models of backplates 30. Through the close fit of the edge contours, the backplate 30 can achieve rapid guidance and automatic limiting when placed into the testing station, improving operational convenience and positioning repeatability.

[0075] Furthermore, the peripheral contour of the back plate 30 to be tested is perpendicular to its back surface, so that when the periphery of the back plate 30 is inserted into the contour limit area of ​​the protruding structure 210, the back plate 30 can stably abut against the protruding structure 210 in the vertical direction, preventing poor contact caused by tilting or warping, thereby ensuring that the fit between the feeler gauge 1000 and the contact gap is constant and the data is stable throughout the entire testing process.

[0076] This structure is suitable for various rectangular or irregularly shaped backplates 30, and is particularly suitable for inspection tasks involving glass backplates 30, metal casings of liquid crystal displays, solar cell encapsulation panels, and other devices with precision frame structures. The device can be used in cleanrooms, process inspection rooms, and offline sampling stations next to production lines, meeting the requirements for high compatibility and high-precision placement.

[0077] In this embodiment, because the present invention employs a technique in which the material support plate 20 has a protruding structure 210 on the side away from the rotary table 10, and the outer periphery of the protruding structure 210 is consistent with the edge contour of the back plate 30, the material support plane 211 forms a precise fitting interface on the top surface of the protrusion, which can guide the back plate 30 to be quickly positioned in a predetermined direction. Therefore, it effectively solves the problems of inaccurate placement, unstable fitting, and inconsistent contact gaps of the back plate 30 in the prior art, thereby achieving accurate alignment of the feeler gauge 1000 detection point with the gap, improved measurement stability, and significant enhancement of detection efficiency and positioning consistency.

[0078] To further improve the positioning accuracy and placement efficiency of the backplate 30 on the material-bearing plane 211, and to avoid the backplate 30 affecting the flatness detection results due to edge offset during the bonding process, in some embodiments, please refer to... Figures 3 to 4 The flatness detection device also includes a positioning frame 1030, which assists the back plate 30 in automatically aligning with the protruding structure 210 during placement and ensures that it is in a standard positioning state before detection. The positioning frame 1030 includes a through frame groove, the edge contour of the inner wall of the frame groove is the same as the edge contour of the outer periphery of the protruding structure 210, and when the positioning frame 1030 is fitted onto the protruding structure 210, the side of the positioning frame 1030 away from the rotary table 10 is higher than the material receiving plane 211.

[0079] Specifically:

[0080] The positioning frame 1030 is a hollow, shell-like structure with a through-groove running through its central area, extending from the upper surface to the lower opening. The inner wall of the groove has a finely machined annular edge, the contour of which perfectly matches the outer contour of the protruding structure 210 on the supporting plate 20 below. This design ensures that when the positioning frame 1030 is fitted over the protruding structure 210 from top to bottom, the inner wall edge of the groove fits snugly against the outer contour of the protruding structure 210, achieving highly precise alignment and guidance.

[0081] The positioning frame 1030 can be made of lightweight alloy, engineering plastic, or other materials with sufficient rigidity and dimensional stability. Its inner surface can be treated with anti-wear or self-lubricating agents to prevent dimensional deviations or jamming problems during long-term use. The positioning frame 1030 is structurally detachable and can be fixedly connected to the support plate 20 by pins, buckles, or slide rails to achieve quick installation and disassembly.

[0082] Specifically, the side of the positioning frame 1030 away from the rotary table 10 is higher than the material-bearing plane 211 in the height direction. That is, the positioning frame 1030 has a vertical protrusion in the installation direction of the back plate 30. This part forms an effective limiting barrier when the back plate 30 is placed. When the back plate 30 is lowered into the frame groove area by manual or automated robotic arm operation, its edge first contacts the inner wall of the positioning frame 1030 and is guided into place. Finally, when it is pressed down to the material-bearing plane 211, it naturally falls into the standard contour of the protruding structure 210, achieving fast and reliable edge alignment.

[0083] This structure is particularly suitable for cases where the edge contour of the backplate 30 is rectangular, rounded rectangular, or a specific irregular shape. It can significantly reduce mounting errors and repetition errors, ensuring data consistency and test window consistency during the measurement process. At the same time, since the positioning frame 1030 provides physical limiting, it avoids unwanted displacement behaviors such as sliding, tilting, and rotation, significantly enhancing the stability and test repeatability of the device during long-term operation.

[0084] In this embodiment, the present invention adopts a positioning frame 1030 structure with a frame groove, and makes its inner wall contour consistent with the outer contour of the protruding structure 210. Furthermore, the positioning wall with a height higher than the material bearing plane 211 is used to guide and physically limit the edge of the back plate 30. Therefore, the problems of back plate 30 placement offset, inaccurate positioning and low efficiency of manual alignment in the prior art are effectively solved. Thus, the technical effects of rapid and accurate positioning of the back plate 30 in the detection device, enhanced bonding consistency and significantly improved repeatability and stability of flatness detection results are achieved.

[0085] To facilitate the operator's intuitive judgment of the axial position of the sliding sleeve 70 on the adjusting rod 60 and to improve the accuracy and repeatability of the height adjustment of the measuring point, in some embodiments, the adjusting rod 60 is provided with scale marks on its side (not shown in the figure).

[0086] Specifically:

[0087] The scale marks are evenly distributed along the axial direction of the adjusting rod 60 and are located on the outer surface of the adjusting rod 60. The scale spacing can be preset according to the measurement accuracy requirements and is formed by laser etching, etching printing or mechanical scratching to ensure its wear resistance and clarity.

[0088] The scale markings are continuous or discontinuous lines, accompanied by numbers or symbols, used to indicate the current position of the sliding sleeve 70 relative to the reference end of the adjusting rod 60. When the sliding sleeve 70 moves up and down vertically on the adjusting rod 60, its side maintains a relative sliding relationship with the surface of the adjusting rod 60. The operator can quickly confirm the current height status of the measuring component by observing the scale position aligned with the sliding sleeve 70.

[0089] The scale marks can be used in conjunction with a viewing window (not shown in the figure), an observation hole (not shown in the figure), or a scale alignment indicator line (not shown in the figure) set on the outer wall of the sliding sleeve 70, so that the specific position of the sliding sleeve 70 after each adjustment can be accurately read, and manual recording or control system parameter input can be performed accordingly, thereby improving the positioning consistency and operation convenience of the entire detection device.

[0090] This structure is suitable for scenarios that require frequent switching of measurement height or inspection of the flatness of multiple backplates at 30 points. Especially in inspection processes involving human intervention, the scale structure provides operational consistency assurance and helps reduce errors from repeated operations and human adjustment deviations.

[0091] In this embodiment, because the present invention uses the technical means of setting scale marks on the side of the adjusting rod 60, the operator or the supporting device can quickly identify and locate the height position of the sliding sleeve 70. Therefore, it effectively solves the problems of lack of visual reference, poor operation repeatability and difficulty in confirming the adjustment result in the prior art of adjusting the position of the sliding sleeve 70. Thus, it realizes the technical effects of intuitive and controllable adjustment of the sliding sleeve 70, improved adjustment efficiency and enhanced consistency and reproducibility of measurement data.

[0092] To further improve the bonding stability of the backplate 30 during the testing process, suppress micro-warping, and reduce local floating caused by uneven gravity or external disturbances, in some embodiments, please refer to [reference needed]. Figure 4 The flatness detection device also includes a groove at the center of the material-bearing plane 211 of the material-bearing plate 20, and a controlled electromagnetic component in the groove to apply a magnetic attraction force to the back plate 30 placed on the material-bearing plane 211 when the detection device is in working state.

[0093] Specifically:

[0094] A groove for accommodating electromagnetic components is machined in the central area of ​​the receiving plane 211 of the receiving plate 20. The opening of the groove faces upward, and the bottom is integrally formed with the internal structure of the receiving plate 20. This groove is preferably located at the geometric center of the receiving plane 211 so that the magnetic force generates a uniformly distributed adsorption effect on the surface of the back plate 30. The groove size is set according to the volume of the embedded electromagnetic components and the heat control requirements. The groove walls are insulated to prevent magnetic leakage or heat conduction from interfering with the surrounding structure.

[0095] An electromagnetic component is fixedly installed inside the groove. This component can be a sheet electromagnet, a coil core assembly, or an integrated electrically controlled magnetic block. Its energization state is controlled by the overall controller. When the detection device is in operation, the electromagnetic component is energized to generate a stable magnetic field, and applies a certain magnetic attraction force to the metal back plate 30 (such as a display back plate 30 with a magnetic coating or metal shell) attached to it through the material-bearing plane 211. This achieves active adsorption and holding of the back plate 30, making its back surface fit more tightly with the material-bearing plane 211.

[0096] The adsorption process can be continuous or intermittent, or its intensity can be adjusted according to the control logic, to match different stages of the detection process. For example, adsorption can be maintained during rotary detection and automatically released after reading is completed, making it easy to remove and replace the backplate 30. The adsorption intensity can be flexibly adjusted by changing the current, magnetic core polarity, or excitation frequency to accommodate backplate 30 materials of different thicknesses and magnetic properties.

[0097] This structure is suitable for flatness inspection scenarios requiring high fit and disturbance resistance, especially in the inspection of thin, lightweight electronic backplanes 30 with sensitive edges to slight warping. Applicable environments include normal temperature conditions, dry and clean inspection rooms, or the terminal areas of automated production lines. It can be used in combination with other positioning or fixing mechanisms to achieve multi-mode stabilization.

[0098] In this embodiment, because the present invention adopts the technical means of setting a groove in the center of the support plate 20 and embedding a controlled electromagnetic component, the detection device can apply magnetic attraction force to the back plate 30 during operation, thereby enhancing the bonding and holding effect. Therefore, it effectively solves the problems of unstable bonding, edge floating and interference vibration of the back plate 30 in the detection process in the prior art, and thus achieves a significant improvement in the bonding consistency of the back plate 30, the detection accuracy, and the overall detection reliability and anti-interference ability.

[0099] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A backplane flatness detection apparatus, characterized by, include: A rotary table, including a drive end for controlled rotation, the drive end including a placement plane; A support plate is disposed at the placement plane. The support plate includes a support plane for placing the back plate and is in contact with the back of the back plate. The support plane is parallel to the placement plane. The base includes a mounting surface parallel to the material-bearing surface; A torque sensor is disposed at the mounting plane, and the torque sensor includes an input terminal; An adjusting rod is connected to the input end, and the axis of the adjusting rod is perpendicular to the mounting plane; A sliding sleeve is fitted over the outside of the adjusting rod and is controlled to move or remain stationary along the extension direction of the adjusting rod. A measuring rod is disposed on the side of the sliding sleeve. The extension direction of the measuring rod is perpendicular to the extension direction of the adjusting rod, and a slot is provided at the end of the measuring rod away from the sliding sleeve along its own extension direction. An elastic element is disposed in the slot, and one end of the elastic element abuts against the inner wall of the slot near the sliding sleeve side; A feeler gauge, comprising a measuring end and an insertion end, the insertion end being inserted into the slot and connected to the other end of the elastic element, the measuring end extending to the outside of the measuring rod; A controller is connected to the torque sensor to receive the detection value from the torque sensor; When the detection device is in operation, the side of the feeler gauge closest to the base is coplanar with the material-bearing plane, and the measuring end of the feeler gauge abuts against the contact gap between the back of the back plate and the material-bearing plane.

2. The apparatus for detecting flatness of a backplane according to claim 1, wherein The sliding sleeve has a through threaded groove on its side, and a locking knob is threadedly connected to the threaded groove. When the sliding sleeve is in a stationary state, one end of the locking knob abuts against the side of the adjusting rod.

3. The apparatus of claim 1, wherein It also includes a leveling mechanism, which comprises: An adjustment base includes a fixed plane for placing the rotary table; Several adjustable feet are provided, each adjustable foot having a telescopic end and a fixed end. The fixed end of the adjustable foot is connected to the adjusting seat. The telescopic end is telescopically extended and retracted in a controlled manner, and the telescopic direction of the telescopic end is perpendicular to the fixed plane.

4. The apparatus of claim 3, wherein The number of adjustable feet is three, and all three adjustable feet are located on the side of the adjusting seat away from the fixed plane. The three adjustable feet are arranged in a ring at equal intervals with the center of the fixed plane as the center.

5. The apparatus of claim 1, wherein The material support plate has a protruding structure on the side away from the rotary table, and the side of the protruding structure away from the rotary table is the material support plane.

6. The apparatus of claim 5, wherein, The outer periphery of the protruding structure has the same edge profile as the outer periphery of the back plate, and the periphery of the back plate is perpendicular to the back surface of the back plate.

7. The apparatus of claim 6, wherein, It also includes a positioning frame, which includes a through frame groove. The edge contour of the inner wall of the frame groove is the same as the edge contour of the outer periphery of the protruding structure. When the positioning frame is fitted onto the protruding structure, the side of the positioning frame away from the rotary table is higher than the material bearing plane.

8. The apparatus of claim 1, wherein, The side of the adjusting rod has graduation marks.

9. The apparatus of claim 1, wherein, A groove is provided at the center of the material-bearing plane of the material-bearing plate, and a controlled electromagnetic component is provided in the groove to apply a magnetic attraction force to the back plate placed on the material-bearing plane when the detection device is in working state.

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