A folding screen torsion test device and method

Abstract

The application provides a folding screen torsion test device and method, which comprises a base body with a built-in torque sensor, a hinge fixing mechanism and a rotary driving mechanism. The fixed clamp and the movable clamp of the hinge fixing mechanism can clamp two hinges of the folding screen respectively, and the movable clamp is equipped with a follow-up arm. The rotary disc of the rotary driving mechanism is linked with the torque sensor, and the two groups of elastic limiting arms at the end of the extension support can rotate with the rotary disc and enclose a limiting space. The follow-up arm is driven by limiting cooperation to drive the movable clamp to complete horizontal reciprocating torsion motion relative to the fixed clamp. The application can accurately collect torque data during the torsion process, eliminate data fluctuations caused by transmission clearance, truly restore the long-term opening and closing fatigue aging working conditions of the hinge, adapt to the testing of folding screen hinges of multiple specifications, accurately detect the torque attenuation and durability of the hinge, effectively improve the testing accuracy and efficiency, and provide reliable data support for the performance verification and structure optimization of the folding screen hinge.

Description

Technical Field

[0001] This invention relates to the field of foldable screen technology, and in particular to a foldable screen torsion testing device and method. Background Technology

[0002] As foldable screen terminal products continue to iterate and develop, the torque performance of the hinge components on both sides of the foldable screen directly affects the opening and closing feel, usage stability and service life of the whole device. During the product development stage, it is necessary to conduct long-term torque aging tests on the hinges to verify the torque decay characteristics and durability reliability of the hinges after continuous repetitive opening and closing conditions.

[0003] Currently, there is a lack of dedicated testing fixtures for torque aging testing of dual hinges for foldable screens. Most tests rely on modified general-purpose testing equipment. However, this general-purpose equipment is difficult to match the synchronous assembly and motion conditions of dual hinges for foldable screens, resulting in poor test compatibility and an inability to stably adapt to different specifications of foldable screen hinge samples. Furthermore, the general-purpose structure has large transmission clearances and insufficient clamping and positioning accuracy, which easily leads to torque data fluctuations during testing. It is difficult to accurately collect hinge torque change data during aging, resulting in large test error. This cannot truly reflect the collaborative working state of dual hinges under actual use conditions of foldable screens, and it is impossible to efficiently and reliably complete the torque durability verification of dual hinges for foldable screens, thus hindering the reliability research and performance evaluation of foldable screen hinges. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of poor accuracy and compatibility in the testing of folding screen hinges in the prior art, and to provide a folding screen torsion testing device and method.

[0005] To address the aforementioned technical problems, this invention provides a foldable screen torsion testing device, comprising: a platform, wherein a torque sensor is disposed inside the platform; a hinge fixing mechanism, comprising a fixed clamp and a movable clamp, wherein two hinges of the foldable screen to be tested are respectively clamped in the fixed clamp and the movable clamp, wherein the fixed clamp is fixedly connected to the platform, and a follower arm is disposed on the movable clamp; and a rotation driving mechanism, comprising a turntable, an extension bracket, and two elastic limiting arms, wherein the turntable is connected to the torque sensor, one end of the extension bracket is connected to the turntable, and the other end is connected to the two elastic limiting arms, so as to drive the elastic limiting arms to rotate around the central axis of the turntable, wherein a limiting space is formed between the two elastic limiting arms, and the follower arm can be inserted into the limiting space to move horizontally around the fixed clamp via the elastic limiting arms.

[0006] In one embodiment of the present invention, the fixing clamp includes a fixing plate, a first vertical plate, a first bottom beam, and a first clamping plate. The fixing plate is connected to the platform. The first vertical plate extends vertically. The first bottom beam is connected to the bottom of the first vertical plate to support a hinge. The first clamping plate is slidably connected to the top of the first vertical plate in a vertical direction. A tension spring is provided between the first clamping plate and the first vertical plate to cooperate with the first bottom beam to clamp a hinge. The moving clamp includes a second vertical plate, a second bottom beam, and a second clamping plate. The second vertical plate extends vertically. One end of the follower arm is connected to the second vertical plate. The second bottom beam is connected to the bottom of the second vertical plate to support a hinge. The second clamping plate is slidably connected to the top of the second vertical plate in a vertical direction. A tension spring is provided between the second clamping plate and the second vertical plate to cooperate with the second bottom beam to clamp another hinge.

[0007] In one embodiment of the present invention, the hinge fixing mechanism further includes an unlocking mechanism. The unlocking mechanism includes a base frame and two unlocking components. The base frame is disposed on the platform and located on one side of the fixing clamp. The two unlocking components are disposed on the base frame and respectively correspond to the fixing clamp and the moving clamp. Each unlocking component includes an unlocking driver, a slider, and an unlocking hook. The unlocking driver is connected to the base frame, and the slider is connected to the power output end of the unlocking driver to move in a vertical direction. The unlocking hook is disposed on the slider. The unlocking hooks of the two unlocking components can respectively abut against and lift the first clamping plate and the second clamping plate.

[0008] In one embodiment of the present invention, the unlocking mechanism further includes a counter-pressure assembly, which includes a pressure drive and a pressure protrusion. The pressure drive is connected to the base frame, and the pressure protrusion is connected to the power output end of the pressure drive to move in a vertical direction. The pressure protrusion can abut against the pressure beam of the first vertical plate to counter-pressure the lifting tendency of the unlocking mechanism on the fixing clamp.

[0009] In one embodiment of the present invention, the unlocking mechanism further includes a positioning component, which includes an opening and closing driver, two opening and closing plates, and a positioning pin. The opening and closing driver is disposed on the base frame, and the two opening and closing plates are respectively connected to the two power output ends of the opening and closing driver to move relative to each other in the horizontal direction. The positioning pin is disposed on at least one of the opening and closing plates, and the positioning pin can pass through and be connected to the positioning hole of the positioning member on the second vertical plate.

[0010] In one embodiment of the present invention, the elastic limiting arm includes a first mounting shaft, a second mounting shaft, a mounting block, a compression spring, a rotating frame, and a stop ball. The mounting block is connected to the extension bracket, and the rotating frame is rotatably connected to the mounting block via the first mounting shaft. The bottom surface of the rotating frame is provided with two stop protrusions spaced apart along its width direction, and the top surface of the rotating frame is provided with a limiting wheel that can abut against the follower arm. The second mounting shaft passes through and is connected to the mounting block, and the compression spring is sleeved on the second mounting shaft, with one end connected to the stop ball. Under normal testing conditions, the stop ball is locked between the two stop protrusions, restricting the rotation of the rotating frame relative to the mounting block, allowing the elastic limiting arm to drive the follower arm to move. When the moving fixture experiences over-travel jamming or over-rotation, the follower arm pushes the limiting wheel in the opposite direction, causing the rotating frame to press down on the stop ball and compress the compression spring, causing the stop protrusions to disengage from the limiting constraint of the stop ball, so that the rotating frame can adaptively rotate relative to the mounting block, thereby releasing the follower arm.

[0011] In one embodiment of the present invention, the rotary drive mechanism further includes a rotary driver, which is disposed on the platform and the power output end of the rotary driver is connected to the turntable; the extension bracket is provided with a leveling beam, which extends horizontally and is symmetrically disposed on both sides of the extension bracket to be leveled by external leveling weights; the platform is provided with a barcode scanner, which is disposed facing the hinge fixing mechanism.

[0012] In one embodiment of the present invention, the foldable screen torsion testing device further includes a control mechanism, wherein the rotation drive mechanism, the hinge fixing mechanism and the torque sensor are respectively connected to the control mechanism.

[0013] This invention also provides a method for testing the torsion of a foldable screen, which uses the aforementioned foldable screen torsion testing equipment to perform the torsion test. The method includes: Step S1, after resetting the foldable screen torsion testing equipment to its initial zero position, clamping and fixing the two hinges of the foldable screen to be tested onto the fixed fixture and the movable fixture respectively, and positioning and locking the two hinges to complete the clamping of the sample to be tested; Step S2, setting the preset rotation angle, test speed, and preset number of cycles, starting the test, and driving the movable fixture to reciprocate and twist relative to the fixed fixture through a rotation drive mechanism to simulate the folding process. In the actual opening and closing operation of the folding screen, during the reciprocating swing of the moving clamp, the torque sensor collects the real-time torque data of the hinge and records the real-time rotation angle of the moving clamp simultaneously, establishing a torque-angle correspondence; Step S3: Repeat the torsional swing action of step S2 until the moving clamp swings back and forth relative to the fixed clamp for a preset number of cycles, then stop the drive mechanism and complete the aging cycle; Step S4: After the device stops, obtain the torque detection data after the aging cycle, compare it with the initial torque parameters, and detect and evaluate the torsional durability performance and torque decay of the folding screen hinge.

[0014] In one embodiment of the present invention, in step S1, the first clamping plate of the fixed clamp and the second clamping plate of the moving clamp are respectively raised at the initial zero position by two unlocking components. After the two hinges of the folding screen to be tested are respectively placed inside the fixed clamp and the moving clamp, the first clamping plate and the second clamping plate are released to complete the clamping of the sample to be tested in the vertical direction. In steps S2 and S3, under normal testing conditions, the elastic limiting arm in the rotation drive mechanism maintains rigid limitation through the locking cooperation of the stop ball and the stop protrusion, and stably drives the follower arm and the moving clamp to swing. When over-position jamming or over-travel rotation occurs during the test, the follower arm pushes the limiting wheel in the opposite direction, driving the rotating frame to adaptively release the follower arm.

[0015] The technical solution of the present invention has the following advantages compared with the prior art:

[0016] The folding screen torsion testing equipment and method described in this invention constructs a dedicated folding screen hinge torsion aging test structure by setting up a matching platform, hinge fixing mechanism and rotation drive mechanism, which effectively solves the industry pain points of poor compatibility, low testing accuracy and inability to adapt to the dual-hinge collaborative torsion test conditions of existing conventional testing equipment.

[0017] The torque sensor integrated inside the platform can directly coordinate with the turntable of the rotary drive mechanism, enabling real-time and accurate acquisition of torque data during the hinge torsion process. This avoids the problems of large transmission gaps and significant data fluctuations in traditional general-purpose testing equipment, greatly improving the accuracy and stability of torque test data. This solution uses fixed and movable clamps to hold the two hinges of the folding screen respectively, accurately simulating the opening and closing torsion motion of the folding screen during actual use, and adapting to the clamping and testing needs of various folding screen hinge specifications.

[0018] Meanwhile, this equipment boasts strong adaptability and compatibility. Relying on the two elastic limiting arms at the end of the extension bracket to form a limiting space, it drives the follower arm of the moving fixture to limit movement. This enables the moving fixture to achieve smooth reciprocating horizontal torsional motion relative to the fixed fixture. The transmission is stable and the motion is highly consistent, which can realistically reproduce the fatigue aging conditions of folding screen hinges after long-term opening and closing. It effectively avoids the defects of traditional testing methods, such as distortion in the simulation of working conditions and large testing errors. It accurately detects the torque decay performance and durability reliability of the hinge after long-term torsion, providing accurate and reliable test data support for the structural optimization, performance verification and quality development of folding screen hinges, and significantly improving the overall efficiency and accuracy of torque aging testing of folding screen hinges. Attached Figure Description

[0019] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the folding screen torsion testing device in a preferred embodiment of the present invention;

[0021] Figure 2 yes Figure 1 The diagram shows a three-dimensional structure of the platform, rotation drive mechanism, and fixing fixture in the folding screen torsion testing equipment.

[0022] Figure 3 yes Figure 1 A three-dimensional structural diagram of the fixing fixture in the folding screen torsion test equipment shown;

[0023] Figure 4 yes Figure 1 A three-dimensional structural diagram of the moving fixture in the folding screen torsion testing device shown;

[0024] Figure 5 yes Figure 1 A three-dimensional structural diagram of part of the rotation drive mechanism in the folding screen torsion test device shown;

[0025] Figure 6 yes Figure 5 Enlarged structural diagram at point A in the middle;

[0026] Figure 7 yes Figure 1 A three-dimensional structural diagram of the unlocking mechanism in the foldable screen torsion test device shown;

[0027] Figure 8 yes Figure 7 Enlarged structural diagram at point B in the middle.

[0028] Explanation of reference numerals in the accompanying drawings: 100, platform; 110, barcode scanner; 200, rotary drive mechanism; 210, rotary driver; 220, turntable; 230, extension bracket; 231, leveling beam; 240, elastic limiting arm; 241, first mounting shaft; 242, mounting block; 243, second mounting shaft; 2431, stop ball; 244, compression spring; 245, rotating frame; 2451, stop protrusion; 246, limiting wheel; 300, hinge fixing mechanism; 310, fixing clamp; 311, fixing plate; 312, first vertical plate; 3121, lower pressure beam; 31 3. First bottom beam; 314. First clamping plate; 320. Moving clamp; 321. Second vertical plate; 3211. Positioning component; 3212. Positioning hole; 322. Second bottom beam; 323. Second clamping plate; 324. Follower arm; 330. Unlocking mechanism; 331. Base frame; 332. Unlocking assembly; 3321. Unlocking driver; 3322. Slider; 3323. Unlocking hook; 333. Counter-impact assembly; 3331. Press-down driver; 3332. Press-down protrusion; 334. Positioning assembly; 3341. Opening and closing driver; 3342. Opening and closing plate; 3343. Positioning pin. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0030] Example 1: See Figures 1 to 8As shown, this embodiment provides a folding screen torsion testing device, which includes: a platform 100, the platform 100 having a torque sensor inside; a hinge fixing mechanism 300, the hinge fixing mechanism 300 including a fixing clamp 310 and a moving clamp 320, the two hinges of the folding screen to be tested being clamped in the fixing clamp 310 and the moving clamp 320 respectively, wherein the fixing clamp 310 is fixed to the platform 100, and the moving clamp 320 is provided with a follower arm 324; and a rotation drive mechanism 200, the rotation drive mechanism... The structure 200 includes a turntable 220, an extension bracket 230, and two elastic limiting arms 240. The turntable 220 is connected to the torque sensor. One end of the extension bracket 230 is connected to the turntable 220, and the other end is connected to the two elastic limiting arms 240, so as to drive the elastic limiting arms 240 to rotate around the central axis of the turntable 220. The space between the two elastic limiting arms 240 is a limiting space. The follower arm 324 can be inserted into the limiting space to move horizontally around the fixed clamp 310 through the elastic limiting arms 240.

[0031] In this embodiment, the platform 100 serves as the overall load-bearing foundation structure, providing a stable installation benchmark and assembly space for each functional mechanism. At the same time, the built-in torque sensor can sense and collect torque parameters during the torsion process in real time, enabling accurate detection and output of test data.

[0032] Furthermore, the platform 100 is equipped with a barcode scanner 110, which is positioned towards the hinge fixing mechanism 300. The barcode scanner 110 can scan and identify the sample to be tested placed at the hinge fixing mechanism 300, quickly read the sample identity information, and realize the automatic association and binding of sample information with the current torsion test data. There is no need to manually enter the sample number information, which reduces the problems of incorrect or missing entries caused by manual entry, facilitates the traceability management of each set of test data, and improves the automation level and reliability of test data management of the entire test equipment.

[0033] Furthermore, the rotary drive mechanism 200 also includes a rotary driver 210, which is mounted on the platform 100, and its power output end is connected to the turntable 220. The rotary driver 210 provides controllable rotational power to the turntable 220, directly driving it to reciprocate through its power output end. This provides the power source for the entire rotary drive mechanism 200, allowing for controllable adjustment of the rotation angle and speed. This simulates the actual opening and closing motion of a folding screen hinge, ensuring stable and controllable output motion of the turntable 220, and thus guaranteeing the reliability of subsequent torque data acquisition.

[0034] In this embodiment, the fixing clamp 310 in the hinge fixing mechanism 300 is fixedly installed on the platform 100, which can stably position and clamp one of the hinges of the folding screen to ensure that the test reference end is fixed. The moving clamp 320 is used to clamp the other hinge of the folding screen. The follower arm 324 provided on it can form a linkage with the rotation drive mechanism 200 to achieve reliable clamping and positioning of the two hinges under test, and meet the assembly requirements of synchronous torsion test of the double hinges of the folding screen.

[0035] Furthermore, the fixing clamp 310 includes a fixing plate 311, a first vertical plate 312, a first bottom beam 313, and a first clamping plate 314. The fixing plate 311 is connected to the platform 100. The first vertical plate 312 extends vertically. The first bottom beam 313 is connected to the bottom of the first vertical plate 312 to support the hinge. The first clamping plate 314 is slidably connected to the top of the first vertical plate 312 in the vertical direction. A tension spring is provided between the first clamping plate 314 and the first vertical plate 312 to cooperate with the first bottom beam 313 to clamp a hinge. The fixing fixture 310 achieves reliable installation and positioning of the entire assembly on the platform 100 through the fixing plate 311. The first vertical plate 312 provides an installation reference for the first bottom beam 313 and the first clamping plate 314. The first bottom beam 313 is used to support the hinge from below. The first clamping plate 314 can slide vertically along the first vertical plate 312 and provides a continuous downward elastic clamping force with the help of a tension spring. It works in conjunction with the first bottom beam 313 to perform vertical elastic clamping on the hinge. The hinge can be quickly clamped without manual tightening of bolts. It can adapt to the small dimensional tolerances of the hinge, which can not only ensure that the hinge is firmly clamped and avoid the sample slippage during the test, thus avoiding a decrease in test accuracy, but also simplify the sample disassembly and assembly process and improve the efficiency of the test operation.

[0036] Correspondingly, the movable clamp 320 includes a second vertical plate 321, a second bottom beam 322, and a second clamping plate 323. The second vertical plate 321 extends vertically, one end of the follower arm 324 is connected to the second vertical plate 321, the second bottom beam 322 is connected to the bottom of the second vertical plate 321 to support the hinge, the second clamping plate 323 is slidably connected to the top of the second vertical plate 321 in the vertical direction, and a tension spring is provided between the second clamping plate 323 and the second vertical plate 321 to cooperate with the second bottom beam 322 to clamp another hinge. The mobile fixture 320 uses the second vertical plate 321 as the main mounting base, providing assembly support for the follower arm 324, the second bottom beam 322, and the second clamping plate 323. The follower arm 324 is fixed to the second vertical plate 321, which can completely transmit the driving force output by the rotary drive mechanism 200 to the entire mobile fixture 320. The second bottom beam 322 supports and positions the other hinge of the folding screen from the bottom. The second clamping plate 323 can slide vertically along the second vertical plate 321. It relies on the tension spring to provide downward elastic clamping force and cooperates with the second bottom beam 322 to achieve elastic clamping of the hinge. It can adapt to the slight size difference of the hinge. The clamping process will not cause hard compression damage to the hinge. During the test, it can ensure that the hinge is clamped firmly and does not slip, ensure reliable torque transmission, reduce test errors caused by clamping, and simplify sample disassembly and assembly operations, thereby improving the overall testing efficiency.

[0037] In this embodiment, the hinge fixing mechanism 300 further includes an unlocking mechanism 330. The unlocking mechanism 330 includes a base frame 331 and two unlocking components 332. The base frame 331 is disposed on the platform 100 and located on one side of the fixing clamp 310. The two unlocking components 332 are both disposed on the base frame 331 and are respectively disposed corresponding to the fixing clamp 310 and the moving clamp 320. The unlocking component 332 includes an unlocking driver 3321, a slider 3322, and an unlocking hook 3323. The unlocking driver 3321 is connected to the base frame 331. The slider 3322 is connected to the power output end of the unlocking driver 3321 to move in the vertical direction. The unlocking hook 3323 is disposed on the slider 3322. The unlocking hook 3323 of the two unlocking components 332 can respectively abut against and lift the first clamping plate 314 and the second clamping plate 323. The unlocking mechanism 330 relies on a base frame 331 arranged on the platform 100 and located on one side of the fixed clamp 310 to provide a stable mounting carrier for the two sets of unlocking components 332. The two sets of unlocking components 332 are arranged corresponding to the fixed clamp 310 and the moving clamp 320, respectively. The unlocking driver 3321 drives the slider 3322 to move in the vertical direction, thereby actuating the unlocking hook 3323 on the slider 3322. The unlocking hook 3323 is used to lift the first clamping plate 314 and the second clamping plate 323 respectively, thereby overcoming the pre-tightening force of the tension spring and realizing the automatic release of the clamps. There is no need to manually open the clamping plates. The unlocking operation of the two clamps can be completed simultaneously or separately, which facilitates the placement and removal of the hinge to be tested, reduces the clamping deviation caused by manual operation, improves the automation level of sample loading and unloading, and also helps to ensure the consistency of each clamping and unlocking action and reduce the test error introduced by human factors.

[0038] Furthermore, the unlocking mechanism 330 also includes a counter-pressure assembly 333, which includes a pressure drive 3331 and a pressure protrusion 3332. The pressure drive 3331 is connected to the base frame 331, and the pressure protrusion 3332 is connected to the power output end of the pressure drive 3331 to move in the vertical direction. The pressure protrusion 3332 can abut against the pressure beam 3121 of the first vertical plate 312 to counter-pressure the lifting tendency of the unlocking mechanism 330 on the fixed clamp 310. The counter-clamping assembly 333 relies on the base frame 331 to complete the installation and fixation of the pressure driver 3331. The pressure driver 3331 drives the pressure protrusion 3332 to move vertically. When the pressure protrusion 3332 presses against the pressure beam 3121 of the first vertical plate 312, it can apply a downward clamping force to the fixed clamp 310 during the process of the unlocking hook 3323 lifting the first clamping plate 314 to generate an upward reaction force. The upward lifting trend of the fixed clamp 310 caused by the operation of the counter-clamping unlocking mechanism 330 prevents the fixed clamp 310 from tilting or displacing, avoids the clamping force from disturbing the test benchmark, eliminates the test deviation caused by the force offset of the clamp, ensures the stability of the fixed clamp 310 during the test, and effectively improves the accuracy of the torque test results and the consistency of repeated tests.

[0039] In addition, the unlocking mechanism 330 also includes a positioning component 334, which includes an opening and closing driver 3341, two opening and closing plates 3342, and a positioning pin 3343. The opening and closing driver 3341 is disposed on the base frame 331. The two opening and closing plates 3342 are respectively connected to the two power output ends of the opening and closing driver 3341 to move relative to each other in the horizontal direction. The positioning pin 3343 is disposed on at least one of the opening and closing plates 3342, and the positioning pin 3343 can pass through and connect to the positioning hole 3212 of the positioning member 3211 on the second vertical plate 321. The positioning component 334 assembles the opening and closing driver 3341 onto the base frame 331. The opening and closing driver 3341 drives the two opening and closing plates 3342 to achieve relative horizontal movement, causing the positioning pin 3343 on the opening and closing plate 3342 to insert into the positioning hole 3212 of the positioning member 3211 at the second vertical plate 321, thereby locking and positioning the moving fixture 320. This can constrain the position of the moving fixture 320 during the sample clamping stage, eliminate the assembly gap of the moving fixture 320, ensure that the moving fixture 320 is in a uniform reference position after each clamping, avoid the initial position offset caused by the gap, complete the precise positioning before the test, and release the positioning constraint after the test starts to avoid interfering with the torsional swing, reduce the torque acquisition error caused by the position deviation, and improve the repeatability consistency of multiple cycle tests.

[0040] In this embodiment, the turntable 220 in the rotary drive mechanism 200 is connected to the torque sensor, which can transmit the torsional torque to the torque sensor in real time during rotation, ensuring synchronous acquisition of torque data. The extension bracket 230 acts as a bridge, rotating synchronously with the turntable 220 and stably supporting two sets of elastic limiting arms 240. This allows the elastic limiting arms 240 to make regular circular reciprocating motions around the central axis of the turntable 220. The limiting space formed by the two elastic limiting arms 240 allows the follower arm 324 of the moving clamp 320 to enter and fit into the limiting space. Then, the synchronous rotation of the elastic limiting arms 240 smoothly pushes the follower arm 324 to move, driving the moving clamp 320 to complete a stable horizontal reciprocating torsional motion relative to the fixed clamp 310. This accurately simulates the actual opening and closing torsional working conditions of the folding screen hinge. The overall structure cooperates and works together to effectively realize the dedicated torque aging and torsional performance test of the folding screen double hinge.

[0041] Further, the elastic limiting arm 240 includes a first mounting shaft 241, a second mounting shaft 243, a mounting block 242, a compression spring 244, a rotating frame 245, and a stop ball 2431. The mounting block 242 is connected to the extension bracket 230. The rotating frame 245 is rotatably connected to the mounting block 242 via the first mounting shaft 241. The bottom surface of the rotating frame 245 is provided with two stop protrusions 2451 spaced apart along its width direction. The top surface of the rotating frame 245 is provided with a limiting wheel 246, which can abut against the follower arm 324. The second mounting shaft 243 passes through and is connected to the mounting block 242. The compression spring 244 is sleeved on the second mounting block 242. The shaft 243 is connected to the stop ball 2431 at one end. Under normal testing conditions, the stop ball 2431 is locked between the two stop protrusions 2451, restricting the rotation of the rotating frame 245 relative to the mounting block 242, so that the elastic limiting arm 240 drives the follower arm 324 to move. When the moving clamp 320 is stuck or rotates beyond its range, the follower arm 324 pushes the limiting wheel 246 in the opposite direction, causing the rotating frame 245 to press down the stop ball 2431 and the compression spring 244, so that the stop protrusion 2451 is released from the limiting constraint of the stop ball 2431, so that the rotating frame 245 can rotate adaptively relative to the mounting block 242, thereby releasing the follower arm 324.

[0042] The elastic limiting arm 240 is reliably assembled with the extension bracket 230 via the mounting block 242. The first mounting shaft 241 provides a rotational hinge fulcrum for the rotating frame 245, and the second mounting shaft 243 provides an assembly guide for the compression spring 244. The compression spring 244 continuously applies an elastic preload to the stop ball 2431. Under normal test conditions, the stop ball 2431 is engaged between the two stop protrusions 2451, restricting the rotation of the rotating frame 245 relative to the mounting block 242. The driving torque is stably transmitted by the limiting wheel 246 on the top surface of the rotating frame 245 abutting against the follower arm 324, thus reliably driving the moving clamp 320. When the moving fixture 320 experiences over-position jamming or overtravel rotation, the follower arm 324 applies a reverse pushing force to the limit wheel 246, driving the rotating frame 245 to rotate and press down the stop ball 2431 and compress the spring 244. This causes the stop protrusion 2451 to disengage from the limit constraint of the stop ball 2431. The rotating frame 245 then rotates adaptively relative to the mounting block 242 and releases the follower arm 324. This achieves overload buffering and force relief, preventing damage to the hinge, fixture, and drive mechanism from hard impacts, improving equipment operating safety, reducing the adverse effects of jamming faults on test data, and ensuring stable testing.

[0043] Specifically, in this embodiment, the extension bracket 230 is provided with a leveling beam 231. The leveling beam 231 extends horizontally and is symmetrically arranged on both sides of the extension bracket 230 for leveling by external leveling weights. The leveling beam 231 can be fitted with external leveling weights, enabling dynamic balance adjustment of the extension bracket 230 and the overall rotating assembly of the turntable 220. This counteracts the eccentricity caused by uneven weight distribution of the rotating components, reduces vibration and additional torque generated during rotation, minimizes interference from eccentric vibration on the torque sensor's acquisition results, improves the stability of rotational motion, and further enhances the accuracy of torque testing and the repeatability of multiple test results.

[0044] In this embodiment, the foldable screen torsion testing equipment also includes a control mechanism. The rotation drive mechanism 200, the hinge fixing mechanism 300, and the torque sensor are respectively connected to the control mechanism. This control mechanism is connected to the rotation drive mechanism 200, the hinge fixing mechanism 300, and the torque sensor, enabling unified coordination of the collaborative actions between the various mechanisms. It completes the setting of test parameters, automatic scheduling and control of the test process, and achieves the orderly execution of fixture unlocking, sample positioning, and reciprocating torsion actions. Simultaneously, it receives torque and angle signals collected by the torque sensor, completes the reception and processing of test data, and realizes automated testing of the entire equipment, reducing manual intervention, ensuring consistent execution of each test process, and further reducing test errors caused by human factors.

[0045] Example 2: This example provides a foldable screen torsion test method, which uses the foldable screen torsion test equipment described in Example 1 to perform the foldable screen torsion test, and includes:

[0046] Step S1: After resetting the folding screen torsion testing equipment to its initial zero position, clamp and fix the two hinges of the folding screen to be tested onto the fixed fixture and the movable fixture respectively, and lock the two hinges in place to complete the clamping of the sample to be tested. This process eliminates residual travel and mechanical deviation of the equipment by resetting the equipment to its initial zero position, unifies the starting reference for each test, and then clamps the two hinges of the folding screen onto the fixed fixture and the movable fixture respectively and locks them in place. This effectively eliminates sample clamping gaps and positional offsets, ensures that the clamping posture of the hinges to be tested is standard and the stress state is consistent, avoids the dispersion of test data caused by clamping deviations, and provides a stable and consistent test premise for subsequent high-precision torsion aging tests.

[0047] Further, in step S1, the first clamping plate of the fixed fixture and the second clamping plate of the movable fixture are raised from the initial zero position by two unlocking components. After the two hinges of the folding screen to be tested are respectively placed inside the fixed fixture and the movable fixture, the first clamping plate and the second clamping plate are released to complete the clamping of the sample to be tested in the vertical direction. This step utilizes two sets of unlocking components to raise the first clamping plate and the second clamping plate from the initial zero position, overcoming the tension spring force to achieve automatic opening of the fixture, facilitating the placement of the two hinges of the folding screen into the corresponding fixtures. After placement, the clamping plates are released, and the tension spring force is used to achieve elastic clamping of the hinges to be tested in the vertical direction. The entire clamping action is automatically completed by the equipment mechanism, and the clamping starting position is uniformly at the initial zero position. This avoids the problems of inconsistent clamping force and placement position deviation caused by manual clamping, ensuring that the clamping posture and pre-tightening state of the sample are consistent each time, reducing the systematic error introduced by clamping, and providing a reliable sample assembly basis for subsequent torsion testing.

[0048] Step S2: Set the preset rotation angle, test speed, and preset number of cycles for the test. Start the test. The rotating drive mechanism drives the moving fixture to reciprocate and twist relative to the fixed fixture, simulating the actual opening and closing of the foldable screen. During the reciprocating swing of the moving fixture, the torque sensor collects the real-time torque data of the hinge and simultaneously records the real-time rotation angle of the moving fixture, establishing a torque-angle correspondence. This process achieves standardized and quantifiable configuration of the test conditions by preset test parameters such as rotation angle, test speed, and number of cycles. After the test starts, the rotating drive mechanism drives the moving fixture to reciprocate and twist relative to the fixed fixture, accurately replicating the real mechanical motion state of the foldable screen during daily opening and closing. At the same time, the torque sensor collects torque data and rotation angle data in real time during the movement, establishing a precise torque-angle correspondence and achieving full synchronous recording of test data, ensuring the completeness, authenticity, and traceability of the test data.

[0049] Step S3: Repeat the torsional oscillation motion of step S2 until the moving fixture oscillates back and forth relative to the fixed fixture for a preset number of cycles, then stop the drive mechanism to complete the aging cycle. This process, through continuous cyclic execution of the torsional oscillation motion, simulates a large number of reciprocating torsional aging conditions of the folding screen hinge under preset working conditions, fully replicating the fatigue wear process of the hinge during long-term use. By stopping the machine after reaching the preset number of cycles, the aging test level and aging degree are precisely controlled, achieving standardized and consistent durability aging verification, and ensuring that the test conditions for different samples are completely uniform.

[0050] Furthermore, in steps S2 and S3, under normal test conditions, the elastic limiting arm in the rotary drive mechanism maintains rigid limitation through the locking cooperation of the stop ball and the stop protrusion, stably driving the follower arm and the moving fixture to swing; when over-position jamming or over-travel rotation occurs during the test, the follower arm pushes the limiting wheel in the opposite direction, driving the rotary frame to adaptively release the follower arm. During the test cycle of steps S2 and S3, rigid limiting is achieved by the locking cooperation between the stop ball and the stop protrusion of the elastic limit arm. This can reliably transmit driving force to the follower arm, driving the moving fixture to complete the reciprocating swing. This ensures effective torque transmission under normal test conditions, guarantees stable torsional action and no obvious gaps in motion transmission. When over-travel jamming or over-rotation failure occurs during the test, the follower arm pushes the limit wheel in the opposite direction to cause the rotating frame to move and adaptively release the follower arm, timely unloading abnormal loads. This prevents the hinges, fixtures and drive mechanism of the folding screen under test from being subjected to excessive hard impacts and thus avoids damage. It also reduces the risk of damage to the equipment and samples due to fault conditions and ensures safe and reliable operation of the test process.

[0051] Step S4: After the device comes to a complete stop, acquire the torque detection data after the aging cycle, compare it with the initial torque parameters, and detect and evaluate the torsional durability and torque decay of the folding screen hinge. This process involves collecting the aging torque data after the device is completely stationary and the mechanical state is stable, and comparing and analyzing it with the initial baseline torque parameters. This allows for a direct and accurate quantification of the torque decay, performance changes, and stability differences of the hinge after long-term reciprocating torsion, effectively evaluating the torsional durability, fatigue resistance, and service life of the folding screen hinge, and completing the accurate detection and technical assessment of the hinge's reliability.

[0052] In summary, the folding screen torsion testing equipment and method described in this invention, by setting up a matching platform, hinge fixing mechanism and rotation drive mechanism, constructs a dedicated folding screen hinge torsion aging test structure, effectively solving the industry pain points of poor compatibility, low testing accuracy and inability to adapt to the dual-hinge collaborative torsion testing conditions of existing conventional testing equipment.

[0053] The torque sensor integrated inside the platform can directly coordinate with the turntable of the rotary drive mechanism, enabling real-time and accurate acquisition of torque data during the hinge torsion process. This avoids the problems of large transmission gaps and significant data fluctuations in traditional general-purpose testing equipment, greatly improving the accuracy and stability of torque test data. This solution uses fixed and movable clamps to hold the two hinges of the folding screen respectively, accurately simulating the opening and closing torsion motion of the folding screen during actual use, and adapting to the clamping and testing needs of various folding screen hinge specifications.

[0054] Meanwhile, this equipment boasts strong adaptability and compatibility. Relying on the two elastic limiting arms at the end of the extension bracket to form a limiting space, it drives the follower arm of the moving fixture to limit movement. This enables the moving fixture to achieve smooth reciprocating horizontal torsional motion relative to the fixed fixture. The transmission is stable and the motion is highly consistent, which can realistically reproduce the fatigue aging conditions of folding screen hinges after long-term opening and closing. It effectively avoids the defects of traditional testing methods, such as distortion in the simulation of working conditions and large testing errors. It accurately detects the torque decay performance and durability reliability of the hinge after long-term torsion, providing accurate and reliable test data support for the structural optimization, performance verification and quality development of folding screen hinges, and significantly improving the overall efficiency and accuracy of torque aging testing of folding screen hinges.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A foldable screen torsion testing device, characterized in that: include: A platform, wherein a torque sensor is installed inside the platform; A hinge fixing mechanism includes a fixed clamp and a movable clamp. The two hinges of the folding screen to be tested are respectively clamped in the fixed clamp and the movable clamp. The fixed clamp is fixed to the platform body, and the movable clamp is provided with a follower arm. A rotary drive mechanism includes a turntable, an extension bracket, and two elastic limiting arms. The turntable is connected to the torque sensor. One end of the extension bracket is connected to the turntable, and the other end is connected to the two elastic limiting arms to drive the elastic limiting arms to rotate around the central axis of the turntable. There is a limiting space between the two elastic limiting arms. The follower arm can be inserted into the limiting space to move horizontally around the fixed clamp via the elastic limiting arms.

2. The folding screen torsion testing device according to claim 1, characterized in that: The fixing clamp includes a fixing plate, a first vertical plate, a first bottom beam, and a first clamping plate. The fixing plate is connected to the platform. The first vertical plate extends vertically. The first bottom beam is connected to the bottom of the first vertical plate to support the hinge. The first clamping plate is slidably connected to the top of the first vertical plate in the vertical direction. A tension spring is provided between the first clamping plate and the first vertical plate to cooperate with the first bottom beam to clamp a hinge. The movable clamp includes a second vertical plate, a second bottom beam, and a second clamping plate. The second vertical plate extends vertically. One end of the follower arm is connected to the second vertical plate. The second bottom beam is connected to the bottom of the second vertical plate to support the hinge. The second clamping plate is slidably connected to the top of the second vertical plate in the vertical direction. A tension spring is provided between the second clamping plate and the second vertical plate to cooperate with the second bottom beam to clamp another hinge.

3. The folding screen torsion testing device according to claim 2, characterized in that: The hinge fixing mechanism further includes an unlocking mechanism, which includes a base frame and two unlocking components. The base frame is disposed on the platform and located on one side of the fixing clamp. The two unlocking components are disposed on the base frame and are respectively disposed corresponding to the fixing clamp and the moving clamp. Each unlocking component includes an unlocking driver, a slider, and an unlocking hook. The unlocking driver is connected to the base frame, and the slider is connected to the power output end of the unlocking driver to move in a vertical direction. The unlocking hook is disposed on the slider. The unlocking hooks of the two unlocking components can respectively abut against and lift the first clamping plate and the second clamping plate.

4. The folding screen torsion testing device according to claim 3, characterized in that: The unlocking mechanism also includes a counter-pressure assembly, which includes a pressure drive and a pressure protrusion. The pressure drive is connected to the base frame, and the pressure protrusion is connected to the power output end of the pressure drive to move in the vertical direction. The pressure protrusion can abut against the pressure beam of the first vertical plate to counter-pressure the lifting tendency of the unlocking mechanism on the fixing clamp.

5. The folding screen torsion testing device according to claim 3, characterized in that: The unlocking mechanism further includes a positioning component, which includes an opening and closing driver, two opening and closing plates, and a positioning pin. The opening and closing driver is disposed on the base frame, and the two opening and closing plates are respectively connected to the two power output ends of the opening and closing driver to move relative to each other in the horizontal direction. The positioning pin is disposed on at least one of the opening and closing plates, and the positioning pin can pass through and be connected to the positioning hole of the positioning member on the second vertical plate.

6. The folding screen torsion testing device according to claim 1, characterized in that: The elastic limiting arm includes a first mounting shaft, a second mounting shaft, a mounting block, a compression spring, a rotating frame, and a stop ball. The mounting block is connected to the extension bracket. The rotating frame is rotatably connected to the mounting block via the first mounting shaft. The bottom surface of the rotating frame is provided with two stop protrusions spaced apart along its width direction. The top surface of the rotating frame is provided with a limiting wheel that can abut against the follower arm. The second mounting shaft passes through and is connected to the mounting block. The compression spring is sleeved on the second mounting shaft, and one end of it is connected to the stop ball. Under normal testing conditions, the stop ball is locked between the two stop protrusions, restricting the rotation of the rotating frame relative to the mounting block, allowing the elastic limit arm to drive the follower arm to move. When the moving fixture experiences over-intervention or over-travel rotation, the follower arm pushes the limit wheel in the opposite direction, causing the rotating frame to press down on the stop ball and compress the spring, causing the stop protrusion to disengage from the limit constraint of the stop ball, so that the rotating frame can rotate adaptively relative to the mounting block, thereby releasing the follower arm.

7. The folding screen torsion testing device according to claim 1, characterized in that: The rotary drive mechanism further includes a rotary driver, which is mounted on the platform and the power output end of the rotary driver is connected to the turntable. The extension bracket is equipped with a leveling beam, which extends horizontally and is symmetrically arranged on both sides of the extension bracket to be leveled by external leveling weights. The platform is equipped with a barcode scanner, which is positioned facing the hinge fixing mechanism.

8. The folding screen torsion testing device according to claim 1, characterized in that: The foldable screen torsion testing equipment also includes a control mechanism, and the rotation drive mechanism, the hinge fixing mechanism, and the torque sensor are respectively connected to the control mechanism.

9. A method for testing the torsion of a foldable screen, characterized in that: The folding screen torsion test is performed using the folding screen torsion testing equipment according to any one of claims 1 to 8, which includes: Step S1: After resetting the folding screen torsion test device to the initial zero position, clamp and fix the two hinges of the folding screen to be tested onto the fixed fixture and the movable fixture respectively, and position and lock the two hinges respectively to complete the clamping of the sample to be tested. Step S2: Set the preset rotation angle, test speed and preset number of cycles parameters, start the test, drive the moving fixture to reciprocate and twist relative to the fixed fixture through the rotation drive mechanism to simulate the actual opening and closing of the folding screen. During the reciprocating swing of the moving fixture, the torque sensor collects the real-time torque data of the hinge in real time and records the real-time rotation angle of the moving fixture at the same time to establish the torque-angle correspondence. Step S3: Repeat the torsional swing motion of step S2 until the moving fixture swings back and forth relative to the fixed fixture for a preset number of cycles, then stop the drive mechanism and complete the aging cycle. Step S4: After the device comes to a standstill, obtain the torque detection data after the aging cycle, compare it with the torque parameters in the initial state, and detect and evaluate the torsional durability and torque decay of the folding screen hinge.

10. The foldable screen torsion test method according to claim 9, characterized in that: In step S1, the first clamping plate of the fixed clamp and the second clamping plate of the movable clamp are raised at the initial zero position by two unlocking components. After the two hinges of the folding screen to be tested are respectively placed inside the fixed clamp and the movable clamp, the first clamping plate and the second clamping plate are released to complete the clamping of the sample to be tested in the vertical direction. In steps S2 and S3, under normal test conditions, the elastic limiting arm in the rotary drive mechanism maintains rigid limitation through the locking cooperation between the stop ball and the stop protrusion, stably driving the follower arm and the moving fixture to swing; when over-position jamming or over-travel rotation occurs during the test, the follower arm pushes the limiting wheel in the opposite direction, driving the rotary frame to adaptively release the follower arm.

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