A display screen compression strength detection device

Abstract

This application relates to the field of display screen compressive strength testing technology, specifically disclosing a display screen compressive strength testing device, including a base, a sliding stage slidably disposed on the upper end of the base, a placement seat rotatably disposed on the side wall of the sliding stage, a cylinder slidably disposed on the side wall of the placement seat away from the sliding stage, a clamping assembly disposed on the inner circumferential wall of the cylinder, and two sets of six-axis robots symmetrically disposed on the side of the base away from the sliding stage. A compressive strength testing mechanism is disposed on the output end of both sets of six-axis robots and on the base. A wearable device is fixed to the outer circumferential wall of the cylinder via a strap and then stably clamped by the clamping assembly. The sliding stage slides on the base, driving the placement seat and the wearable device to a suitable testing position. Subsequently, collision detection and two-point collaborative compressive strength testing are performed by the compressive strength testing mechanism, thereby simulating collision detection of the wearable device during arm swing and movement, as well as compressive strength testing in single-point mode and two-point collaborative mode.

Description

Technical Field

[0001] This application relates to the field of display screen compressive strength testing technology, and in particular to a display screen compressive strength testing device. Background Technology

[0002] As an output device that converts electronic signals into visual optical information, the display screen is the core interface of modern human-computer interaction and is widely used in various consumer electronics products such as smartphones, televisions, tablets, etc. Among them, smartwatches and smart bands use curved screens with flexible plastic substrates and OLED technology, which not only improves wearing comfort but also brings a more immersive visual experience. To ensure the reliability and durability of such curved displays in various usage environments, compressive strength testing devices have emerged. Their core function is to quantitatively evaluate the mechanical properties of the screen by simulating external force loading to verify whether its structural strength meets the requirements of product design and safety specifications.

[0003] In existing technologies, wearable device curved screen pressure resistance testing devices typically consist of core structures such as a loading mechanism, a workpiece fixture, a sensor module, and a control system. The loading mechanism often uses a servo electric cylinder or pneumatic component as a power source, and its output end is fixed to the pressure head through a rigid connector to apply force to the screen. The workpiece fixture is mounted on the device base and uses adjustable clamping arms or contoured grooves to position and clamp wearable devices with specific curvatures. The sensor module typically includes force sensors and displacement sensors, which are integrated inside the loading mechanism and below the fixture, respectively, to collect force and deformation data in real time during the test. The control system is connected to each actuator and sensor component via cables and is responsible for loading preset parameters and recording and analyzing test data.

[0004] Regarding the aforementioned technologies, the existing loading mechanisms can only apply multi-point sequential pressure to the curved screen of wearable devices, making it difficult to simulate the working conditions of arm swinging or impacting hard objects during daily use. As a result, a large number of screen failure modes caused by motion are systematically missed. Secondly, it is difficult to achieve pressure resistance testing by applying pressure at two points simultaneously, and it is impossible to reveal the stress field coupling effect generated by the two-point force application. This coupling effect is the key to inducing the propagation of microcracks and interface slippage in stress concentration areas such as screen edges and curved corners. As a result, the actual stress situation cannot be effectively assessed, reducing the comprehensiveness and accuracy of reliability verification of curved displays of wearable devices. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a display screen compressive strength testing device.

[0006] The display screen compressive strength testing device provided in this application adopts the following technical solution: A display screen compressive strength testing device includes a base, a sliding stage slidably disposed on the upper end of the base, a placement seat rotatably disposed on the side wall of the sliding stage, a cylinder slidably disposed on the side wall of the placement seat away from the sliding stage, a clamping assembly for clamping a wearable device disposed on the inner peripheral wall of the cylinder, and two sets of six-axis robots symmetrically disposed on the side of the base away from the sliding stage. Both the output ends of the two sets of six-axis robots and the base are provided with compressive strength testing mechanisms for collision detection and two-point collaborative compressive strength testing of the curved screen of the wearable device.

[0007] By adopting the above technical solution, the wearable device is fixed to the outer peripheral wall of the cylinder by a strap, and then stably clamped by the clamping component in this application. The sliding stage slides on the base, which can drive the placement seat, the cylinder and the wearable device to a suitable detection position. Then, the collision detection and two-point collaborative pressure detection are performed by the pressure detection mechanism on the output end of two sets of six-axis robots and on the base, thereby simulating the collision detection of the wearable device during the swinging and movement of the human arm. It can also perform pressure detection in single-point mode and pressure detection in two-point collaborative mode. The two sets of six-axis robots can apply pressure to the screen synchronously with their own independent position, force and angle, simulating the complex stress field of two objects squeezing the screen at the same time. It can accurately reveal the superposition and interference effect of stress waves inside the screen under the two-point stress coupling effect, especially the real mechanical response mechanism of stress concentration areas such as the edge of the curved screen and the top corner of the curved surface in the composite stress field, so that the real stress situation of the most vulnerable part of the screen can be effectively evaluated, improving the comprehensiveness and accuracy of the pressure detection of the curved screen of the wearable device.

[0008] Optionally, the clamping assembly includes a first lead screw motor, a first gripper, and a second gripper. The first lead screw motor is fixedly disposed on the inner circumferential wall of the cylinder. The lead screw of the first lead screw motor includes a first threaded section and a second threaded section, and the first threaded section and the second threaded section are symmetrically arranged. A sliding groove is provided on the inner circumferential wall of the cylinder. The first gripper and the second gripper are both slidably disposed in the sliding groove. The first gripper is threadedly connected to the first threaded section, and the second gripper is threadedly connected to the second threaded section.

[0009] By adopting the above technical solution, after the wearable device is fixed on the cylinder, the first lead screw motor is started. The lead screw of the first lead screw motor rotates and drives the first and second grippers to slide synchronously in opposite directions in the sliding groove opened on the inner circumferential wall of the cylinder. This allows the first and second grippers to approach each other and automatically center and clamp the wearable device, ensuring that the wearable device is in the same position after each clamping. This eliminates human clamping deviation, improves detection repeatability and data consistency, and can adapt to wearable devices of different shapes and sizes. The clamping is stable and reliable, reducing data distortion caused by device shaking during the detection process.

[0010] Optionally, the pressure resistance testing mechanism includes a first electric push rod, a mounting box, a first mounting base, a first mounting shaft, a first detection head, an angle adjustment component, a two-point collaborative detection component, and a swing arm detection component. The first electric push rod is vertically disposed on the upper end of the placement base, and its telescopic end is fixedly connected to the cylinder. The mounting box is disposed on the upper end of the base and located between the two sets of six-axis robots. The first mounting base is disposed on the upper end of the mounting box. The first mounting shaft is rotatably disposed on the inner side wall of the first mounting base. The first detection head is disposed on the outer peripheral wall of the first mounting shaft. The angle adjustment component is disposed inside the mounting box and is used to adjust the angle of the first detection head. The two-point collaborative detection component is symmetrically disposed on the output ends of the two sets of six-axis robots and is used to perform two-point collaborative pressure resistance testing on the curved screen of the wearable device. The swing arm detection component is disposed on the side wall of the sliding table and is used to perform swing arm collision testing on the curved screen of the wearable device.

[0011] By adopting the above technical solution, when it is necessary to perform collision detection on the curved screen, the first electric push rod is activated. The telescopic end of the first electric push rod moves, which drives the cylinder to move. The movement of the cylinder drives the wearable device to move, thereby driving the wearable device to actively descend and dynamically collide with the first detection head at an adjustable speed and force. This accurately simulates the dynamic impact conditions from slight bumps to severe impacts, and more realistically simulates the mechanical boundary conditions of the wearable device dynamic collision with hard objects in actual scenarios such as motion inertia. It can systematically evaluate the dynamic impact tolerance threshold of the curved screen under different motion intensities.

[0012] Optionally, the angle adjustment assembly includes a drive motor, a worm gear, a worm, a rotating shaft, and a first reduction motor. The drive motor is disposed on the side wall of the mounting box, and its output end extends through the side wall of the mounting box. The worm is fixedly connected to the output end of the drive motor. The rotating shaft is rotatably disposed on the inner top wall of the mounting box and fixedly connected to the lower end of the first mounting base. The worm gear is sleeved on the outer peripheral wall of the rotating shaft and meshes with the worm. The first reduction motor is disposed on the side wall of the first mounting base, and its output end is fixedly connected to the first mounting shaft.

[0013] By adopting the above technical solution, when it is necessary to adjust the angle of the first detection head in the horizontal direction, the drive motor is started. The output end of the drive motor rotates, driving the worm gear fixedly connected to it to rotate. The rotation of the worm gear drives the worm wheel to rotate, and the rotation of the worm wheel drives the rotating shaft, the first mounting base, and the first detection head to rotate, thereby realizing the adjustment of the angle of the first detection head in the horizontal direction. Utilizing the self-locking characteristics of the worm gear, the posture can be stably maintained at any rotation angle, avoiding angle deviation caused by force during the detection process. When it is necessary to adjust the pitch angle of the first detection head in the vertical plane, the first reduction motor is started. The output end of the first reduction motor rotates, driving the first mounting shaft to rotate. The rotation of the first mounting shaft drives the first detection head on the outer peripheral wall to pitch and swing, thereby realizing the adjustment of the pitch angle of the first detection head in the vertical plane. By adjusting the angle in the horizontal direction and the pitch angle in the vertical plane, the real scenario of impacting the screen from the side, oblique, or other non-perpendicular directions is simulated, enabling the first detection head to achieve posture adjustment at any angle in space, expanding the coverage of detection conditions.

[0014] Optionally, the two-point collaborative detection component includes a mounting plate, a second mounting base, a second mounting shaft, a second detection head, a second electric actuator, and a second geared motor. The mounting plate is disposed on the output end of the six-axis robot. The second electric actuator is disposed on the mounting plate, with its telescopic end penetrating through the mounting plate. The second mounting base is disposed on the telescopic end of the second electric actuator. The second mounting shaft is rotatably disposed on the inner sidewall of the second mounting base. The second geared motor is disposed on the sidewall of the second mounting base, with its output end fixedly connected to the second mounting shaft. The second detection head is disposed on the outer peripheral wall of the second mounting shaft.

[0015] By adopting the above technical solution, before conducting the two-point collaborative pressure resistance test, the cylinder and wearable device are first retracted using the first electric actuator to return them to their initial position. Then, two sets of six-axis robots are activated, moving the mounting plate and its second detection head to the detection position. Utilizing the robots' multi-degree-of-freedom motion capabilities, precise positioning of any point on the curved screen is achieved, thus enabling accurate coverage of vulnerable areas such as the center, edges, curvature transition zones, and even the top corners of the curved screen. If fine-tuning of the angle of the second detection head is required, the second reduction motor is activated. The output of the high-speed motor rotates, which drives the second mounting shaft to rotate. The rotation of the second mounting shaft drives the second detection head to rotate, thereby enabling fine adjustment of the angle of the second detection head. This allows the detection head to contact the screen in different postures, such as vertical, tilted, or lateral, simulating impacts and compressions from different directions. Then, the second electric push rod is activated. The extension end of the second electric push rod moves, driving the second mounting base and the second detection head to move and compress the curved screen at a preset position. This achieves two-point coordinated pressure resistance testing of the curved screen and can precisely control the contact distance and pressure intensity between the second detection head and the screen. This system achieves continuously adjustable pressure ranging from slight contact to strong compression. Through the coordinated control of two sets of six-axis robots, the two second detection heads can perform pressure detection in diverse position combinations. They can simultaneously apply pressure to different areas at the center and edge of the screen, symmetrically apply pressure to the left and right edges, or asymmetrically apply pressure to the curvature transition area and apex. This allows for flexible configuration of any two-point positions. In terms of pressure modes, it can perform simultaneous dynamic collision detection at two points to simulate the transient condition of multiple objects impacting the screen simultaneously during movement, as well as continuous static compression detection at two points to simulate creep and stress relaxation behavior under long-term pressure holding. It can also be simplified to standalone operation to achieve single-point dynamic compression or single-point continuous static compression detection. This multi-mode and multi-combination detection capability can systematically reveal the superposition and interference effects of stress waves inside the curved screen under two-point stress coupling, evaluate the influence of different position combinations on the screen failure threshold, provide a complete detection method for the reliability verification of curved screens under complex multi-source stress fields, and reveal the real failure mechanism of the curved screen edge and curvature transition area under two-point stress coupling.

[0016] Optionally, the swing arm detection component includes a third reduction motor, which is disposed on the side wall of the sliding table and its output end is fixedly connected to the placement seat.

[0017] By adopting the above technical solution, when it is necessary to simulate swing arm collision detection, the third reduction motor is activated. The output end of the third reduction motor rotates, driving the placement seat to rotate. The rotation of the placement seat drives the cylinder and the clamped wearable device to rotate synchronously and collide with the first detection head. This allows the wearable device to simulate the swinging motion of a human arm and perform swing arm collision detection, reproducing the composite working condition of the curved screen dynamically impacting external hard objects during the user's walking, running, or arm swinging. This achieves comprehensive coverage of the dynamic collision response of the curved screen under different swing arm intensities, makes up for the lack of static detection in assessing motion inertia failure modes, and provides a comprehensive assessment of the reliability of the curved screen.

[0018] Optionally, the first detection head and the second detection head are each provided with four sets at intervals, and the four sets of first detection heads and the four sets of second detection heads are respectively spherical detection heads, cylindrical detection heads, conical detection heads and multi-protrusion detection heads.

[0019] By adopting the above technical solution, the four sets of first detection heads are switched via the first mounting shaft and the first reduction motor, and the four sets of second detection heads are switched via the second mounting shaft and the second reduction motor. This allows the first and second detection heads to select different shapes of detection heads according to testing requirements. The spherical detection head simulates the collision of rounded hard objects such as door frame edges or table corners with the screen, generating a stress distribution that gradually expands from point contact to surface contact, used to evaluate the impact toughness and stress dispersion ability of the curved screen. The cylindrical detection head simulates large-area compression, used to evaluate the overall structural stiffness and static pressure resistance of the curved screen. Deformation capability: The conical test head simulates extreme point impacts such as punctures from sharp objects like key tips or pebble tips, used to evaluate the fracture toughness and ultimate compressive strength of curved screen cover glass. The multi-convex point test head simulates scenarios where multiple points of contact occur simultaneously, such as keychains or gravel inside a bag, generating a superimposed interference effect of multiple stress concentration points, used to evaluate the surface hardness, scratch resistance, and failure modes under multi-point stress coupling of curved screens. The combined use of the four test heads can comprehensively cover all dimensions of testing scenarios, from macroscopic large-area compression to microscopic point-contact wear, making the compressive strength test results highly consistent with real-world use.

[0020] Optionally, a second lead screw motor is provided at the upper end of the base, and a connecting block is threadedly connected to the output end of the second lead screw motor. The upper end of the connecting block is fixedly connected to the lower end of the sliding table, and a laser rangefinder is slidably arranged on the inner top wall of the placement seat along the width direction.

[0021] By adopting the above technical solution, after the first detection head adjusts its angle, it will create a certain distance between itself and the curved screen of the wearable device. At this time, the second lead screw motor is activated, and the output end of the second lead screw motor rotates, driving the connecting block threaded to the lead screw to move along the axis of the lead screw. The movement of the connecting block drives the sliding table, the placement seat, the cylinder, and the wearable device to move horizontally in sync. The laser rangefinder emits a laser beam towards the first detection head and receives the reflected signal, thereby precisely adjusting the position of the wearable device. This allows the curved screen to automatically follow the angle change of the first detection head and adjust to the optimal detection distance, realizing the linkage control between the angle adjustment of the first detection head and the workpiece position compensation. This ensures that a precise pressure distance can be maintained under different collision detection angles, providing stable contact conditions for dynamic collision detection.

[0022] Optionally, pressure sensors are embedded in both the end of the rotating shaft near the first mounting base and the end of the telescopic end of the second electric actuator near the second mounting base.

[0023] By adopting the above technical solution, when the first detection head contacts the screen, the contact force is transmitted to the rotating shaft through the first mounting base, and the pressure sensor collects the force signal in real time. When the second detection head contacts the screen, the contact force is transmitted to the extension end of the second electric push rod through the second mounting base, and the pressure sensor collects the force signal in real time. This allows for precise measurement of the real-time contact force between the first and second detection heads and the screen, providing millisecond-level high-frequency data acquisition for force value changes during dynamic extrusion. The feedback signal from the pressure sensor ensures that the applied pressure accurately reaches the preset value and remains constant. For dynamic collision detection and extrusion detection, the pressure sensor can capture the peak force and force rise rate at the moment of collision, assessing the screen's dynamic impact resistance. For continuous extrusion detection, the pressure sensor can record the force value decay during long-term pressure holding, revealing the creep characteristics and stress relaxation behavior of the screen material. The synchronous data acquisition of the two pressure sensors provides complete mechanical data support for analyzing the screen failure mechanism under two-point stress coupling.

[0024] Optionally, both the first mounting base and the mounting plate are equipped with industrial cameras for observing and recording the collision detection and pressure resistance testing process of the curved screen of the wearable device.

[0025] By adopting the above technical solutions, industrial cameras continuously acquire image data during collision detection and pressure testing, recording the surface morphology changes, crack initiation and propagation processes, and indentation formation trajectories of the screen during the stress process. For multi-point collaborative pressure testing, industrial cameras arranged at multiple angles can simultaneously record the stress response and interference effects around two pressure points from different perspectives, revealing the propagation path and superposition law of stress waves inside the screen, and providing intuitive empirical data for subsequent process improvement and design optimization.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The angle adjustment component in this application can adjust the angle of the first detection head. Starting the drive motor causes the output end of the drive motor to rotate, which in turn rotates the worm gear. The worm gear then rotates the worm wheel, which in turn rotates the rotating shaft, the first mounting base, and the first detection head, thereby achieving horizontal angle adjustment of the first detection head. Utilizing the self-locking characteristic of the worm gear, the orientation can be stably maintained at any rotation angle, preventing angle deviation due to force during detection. Starting the first reduction motor causes the output end of the first reduction motor to rotate, which in turn rotates the first mounting shaft. The rotation of the first mounting shaft causes the first detection head on the outer peripheral wall to pitch and swing, thereby achieving vertical angle adjustment of the first detection head. By adjusting the angle in the horizontal direction and the vertical angle in the vertical plane, the application simulates real-world scenarios of impacting the screen from non-vertical directions such as sides or oblique angles, enabling the first detection head to achieve orientation adjustment at any angle in space, thus expanding the coverage of detection conditions. 2. The two-point collaborative detection component in this application can perform two-point collaborative pressure resistance testing on a curved screen. First, the cylinder and wearable device are retracted to their initial position using the first electric actuator. Then, two sets of six-axis robots are activated, driving the mounting plate and its second detection head to the detection position. Utilizing the multi-degree-of-freedom motion capability of the robots, precise positioning of any point on the curved screen is achieved, thereby realizing accurate coverage of vulnerable areas such as the center area, edge area, curvature transition area, and even the top corners of the curved screen. The second reduction motor is then activated, and its output rotates to drive the second... The second mounting shaft rotates, which in turn drives the second detection head to rotate, thereby enabling fine-tuning of the angle of the second detection head. This allows the detection head to contact the screen in different postures, such as vertical, tilted, or lateral, simulating impacts and compressions from different directions. Subsequently, the second electric push rod is activated, and the telescopic end of the second electric push rod moves, driving the second mounting base and the second detection head to move and compress the curved screen at a preset position. This achieves two-point coordinated pressure resistance testing of the curved screen and can precisely control the contact distance and pressure intensity between the second detection head and the screen, enabling continuous adjustment from slight contact to strong compression. Through the coordinated control of two sets of six-axis robots, the two second detection heads can perform pressure detection in a variety of position combinations. They can simultaneously act on different areas of the screen center and edge, act symmetrically on the left and right edges, or act asymmetrically on the curvature transition area and the top corner. This allows for flexible configuration of any two point positions. In terms of pressure modes, they can perform dynamic collision detection at two points simultaneously to simulate the transient condition of multiple objects impacting the screen simultaneously during movement, or perform static compression detection at two points continuously to simulate creep and stress relaxation behavior under long-term pressure holding. They can also be simplified to stand-alone operation to achieve single-point dynamic compression or single-point static continuous compression detection. This multi-mode and multi-combination detection capability can systematically reveal the superposition and interference effects of stress waves inside the curved screen under the action of two-point stress coupling, evaluate the influence of different position combinations on the screen failure threshold, provide a complete detection method for the reliability verification of curved screens under complex multi-source stress fields, and reveal the real failure mechanism of the curved screen edge and curvature transition area under the action of two-point stress coupling. 3. The swing arm detection component in this application can perform swing arm collision detection on the curved screen. It starts the third reduction motor, and the output end of the third reduction motor rotates to drive the placement seat to rotate. The rotation of the placement seat drives the cylinder and the clamped wearable device to rotate synchronously and collide with the first detection head. This allows the wearable device to simulate the swinging motion of a human arm and perform swing arm collision detection, thus restoring the composite working condition of the curved screen dynamically colliding with external hard objects during the user's walking, running or swinging arm. It achieves comprehensive coverage of the dynamic collision response of the curved screen under different swing arm intensities, makes up for the lack of static detection in evaluating motion inertia failure modes, and comprehensively evaluates the reliability of the curved screen. 4. The four sets of first detection heads and four sets of second detection heads in this application can simulate various collision conditions. The four sets of first detection heads are switched via a first mounting shaft and a first reduction motor, and the four sets of second detection heads are switched via a second mounting shaft and a second reduction motor. This allows the first and second detection heads to be selected according to testing requirements, using different shapes of detection heads. The spherical detection head simulates the collision of rounded hard objects such as door frame edges or table corners with the screen, generating a stress distribution that gradually expands from point contact to surface contact, used to evaluate the impact toughness and stress dispersion capability of curved screens. The cylindrical detection head simulates large-area compression, used to evaluate the curved screen. The overall structural rigidity and resistance to static pressure deformation are assessed. The conical test head simulates extreme point impacts such as the puncture of sharp objects like key tips or pebble tips, used to evaluate the fracture toughness and ultimate compressive strength of curved screen cover glass. The multi-convex point test head simulates the scenario of multiple points of contact such as keychains or gravel in a bag, generating the superposition interference effect of multiple stress concentration points, used to evaluate the surface hardness, scratch resistance, and failure modes under multi-point stress coupling of curved screens. The combined use of the four test heads can comprehensively cover all-dimensional test scenarios from macroscopic large-area compression to microscopic point-contact wear, making the compressive strength test results highly consistent with real use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 Partial structural diagram; Figure 3 This is a cross-sectional structural diagram of a portion of the structure; Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0029] Reference numerals: 1. Base; 11. Sliding stage; 12. Placement seat; 13. Cylinder; 14. Six-axis robot; 2. Clamping assembly; 21. First lead screw motor; 22. First gripper; 23. Second gripper; 24. Sliding groove; 3. Pressure resistance detection mechanism; 31. First electric actuator; 32. Mounting box; 33. First mounting seat; 34. First mounting shaft; 35. First detection head; 36. Third geared motor; 4. Angle adjustment assembly; 41. Drive motor; 42. Worm gear; 43. Worm; 44. Rotating shaft; 45. First geared motor; 5. Two-point collaborative detection assembly; 51. Mounting plate; 52. Second mounting seat; 53. Second mounting shaft; 54. Second detection head; 55. Second electric actuator; 56. Second geared motor; 6. Second lead screw motor; 61. Connecting block; 62. Laser rangefinder; 7. Pressure sensor; 8. Industrial camera. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0031] This application discloses a display screen compressive strength testing device, referring to... Figure 1 A display screen compressive strength testing device includes a base 1, a sliding stage 11 slidably mounted on the upper end of the base 1, a placement seat 12 rotatably mounted on the side wall of the sliding stage 11, a cylinder 13 slidably mounted on the side wall of the placement seat 12 away from the sliding stage 11, a clamping assembly 2 mounted on the inner circumferential wall of the cylinder 13, and two sets of six-axis robots 14 symmetrically mounted on the side of the base 1 away from the sliding stage 11. A compressive strength testing mechanism 3 is mounted on the output end of the two sets of six-axis robots 14 and on the base 1.

[0032] The wearable device is fixed to the outer peripheral wall of the cylinder 13 by a strap, and then stably clamped by the clamping component 2 in this embodiment. The sliding stage 11 slides on the base 1, which can drive the placement seat 12, the cylinder 13 and the wearable device to a suitable detection position. Then, the collision detection and two-point collaborative pressure detection are performed by the pressure detection mechanism 3 on the output end of the two sets of six-axis robots 14 and on the base 1, thereby simulating the collision detection of the wearable device during the swinging and movement of the human arm. It can also perform pressure detection in single-point mode and pressure detection in two-point collaborative mode. The two sets of six-axis robots 14 can apply pressure to the screen synchronously with their own independent position, force and angle, simulating the complex stress field of two objects squeezing the screen at the same time. It can accurately reveal the superposition and interference effect of stress waves inside the screen under the two-point stress coupling effect, especially the real mechanical response mechanism of stress concentration areas such as the edge of the curved screen and the top corner of the curved surface in the composite stress field, so that the real stress situation of the most vulnerable part of the screen can be effectively evaluated, improving the comprehensiveness and accuracy of the pressure detection of the curved screen of the wearable device.

[0033] Reference Figure 1 and Figure 2 Since the wearable device is only fixed by the watch strap, it may shift during collision detection. Therefore, the clamping component 2 in this embodiment includes a first lead screw motor 21, a first gripper 22, and a second gripper 23. The first lead screw motor 21 is bolted to the inner circumferential wall of the cylinder 13. The lead screw of the first lead screw motor 21 includes a first threaded section and a second threaded section, and the first threaded section and the second threaded section are symmetrically arranged. A sliding groove 24 is provided on the inner circumferential wall of the cylinder 13. The first gripper 22 and the second gripper 23 are both slidably installed in the sliding groove 24. The first gripper 22 is threadedly connected to the first threaded section, and the second gripper 23 is threadedly connected to the second threaded section.

[0034] The first lead screw motor 21 is started, and the lead screw of the first lead screw motor 21 rotates to drive the first gripper 22 and the second gripper 23 to slide synchronously in opposite directions in the sliding groove 24 opened in the inner peripheral wall of the cylinder 13. This allows the first gripper 22 and the second gripper 23 to move closer to each other and automatically center and clamp the wearable device, ensuring that the wearable device is in the same position after each clamping, eliminating human clamping deviation, improving detection repeatability and data consistency, and adapting to wearable devices of different shapes and sizes. The clamping is stable and reliable, reducing data distortion caused by device shaking during the detection process. In this embodiment, clamping pads are provided on the inner sidewalls of the first gripper 22 and the second gripper 23. The clamping pads can effectively increase the friction between the wearable device and the strap or shell, improve the stability and positioning accuracy of the clamping, and reduce the indentation or scratches on the surface of the wearable device, protecting the integrity of the product appearance.

[0035] Reference Figure 1 ,Figure 2 and Figure 3 To perform collision detection on the curved screen, the pressure detection mechanism 3 in this embodiment includes a first electric push rod 31, a mounting box 32, a first mounting base 33, a first mounting shaft 34, a first detection head 35, an angle adjustment component 4, a two-point collaborative detection component 5, and a swing arm detection component. The first electric push rod 31 is vertically bolted to the upper end of the placement base 12, and its telescopic end is fixedly connected to the cylinder 13. The mounting box 32 is welded to the upper end of the base 1 and is located between the two sets of six-axis robots 14. The first mounting base 33 is fixedly installed on the upper end of the mounting box 32. The first mounting shaft 34 is rotatably installed on the inner side wall of the first mounting base 33. The first detection head 35 is welded to the outer peripheral wall of the first mounting shaft 34. The angle adjustment component 4 is installed inside the mounting box 32. The two-point collaborative detection component 5 is symmetrically installed on the output ends of the two sets of six-axis robots 14. The swing arm detection component is installed on the side wall of the sliding table 11.

[0036] The first electric actuator 31 is activated, and the telescopic end of the first electric actuator 31 moves, causing the cylinder 13 to move. The movement of the cylinder 13 causes the wearable device to move, thereby driving the wearable device to actively descend and dynamically collide with the first detection head 35 at an adjustable speed and force. This accurately simulates the dynamic impact conditions from slight bumps to severe impacts, and more realistically simulates the mechanical boundary conditions of the wearable device dynamic collision with hard objects in actual scenarios such as motion inertia. It can systematically evaluate the dynamic impact tolerance threshold of the curved screen under different motion intensities.

[0037] Reference Figure 1 and Figure 2 When performing collision detection on a curved screen, the angle of the first detection head 35 needs to be adjusted according to the detection requirements. Therefore, the angle adjustment component 4 in this embodiment includes a drive motor 41, a worm gear 42, a worm 43, a rotating shaft 44, and a first reduction motor 45. The drive motor 41 is bolted to the side wall of the mounting box 32, and its output end is set through the side wall of the mounting box 32. The worm 43 is fixedly connected to the output end of the drive motor 41. The rotating shaft 44 is rotatably mounted on the inner top wall of the mounting box 32 and fixedly connected to the lower end of the first mounting base 33. The worm gear 42 is sleeved on the outer peripheral wall of the rotating shaft 44 and meshes with the worm 43. The first reduction motor 45 is bolted to the side wall of the first mounting base 33, and its output end is fixedly connected to the first mounting shaft 34.

[0038] The drive motor 41 is started, and its output rotates, driving the worm gear 43 fixedly connected to it to rotate. The worm gear 43 rotates, driving the worm wheel 42 to rotate. The worm wheel 42 rotates, driving the rotating shaft 44, the first mounting base 33, and the first detection head 35 to rotate, thereby achieving the horizontal angle adjustment of the first detection head 35. Utilizing the self-locking characteristics of the worm wheel 42 and worm gear 43, the posture can be stably maintained at any rotation angle, avoiding angle deviation due to force during the detection process. When it is necessary to adjust the pitch angle of the first detection head 35 in the vertical plane, the first reduction motor 45 is started, and its output rotates, driving the first mounting shaft 34 to rotate. The rotation of the first mounting shaft 34 causes the first detection head 35 on the outer peripheral wall to pitch and swing, thereby achieving the pitch angle adjustment of the first detection head 35 in the vertical plane. By adjusting the angle in the horizontal direction and the pitch angle in the vertical plane, the real scenario of impacting the screen from the side, oblique, or other non-vertical directions is simulated, enabling the first detection head 35 to achieve posture adjustment at any angle in space, expanding the coverage of detection conditions.

[0039] Reference Figure 1 and Figure 3 To perform two-point collaborative pressure resistance testing on curved screens, the two-point collaborative testing component 5 in this embodiment includes a mounting plate 51, a second mounting base 52, a second mounting shaft 53, a second testing head 54, a second electric push rod 55, and a second reduction motor 56. The mounting plate 51 is bolted to the output end of the six-axis robot 14. The second electric push rod 55 is bolted to the mounting plate 51, and its telescopic end passes through the mounting plate 51. The second mounting base 52 is fixedly mounted on the telescopic end of the second electric push rod 55. The second mounting shaft 53 is rotatably mounted on the inner side wall of the second mounting base 52. The second reduction motor 56 is bolted to the side wall of the second mounting base 52, and its output end is fixedly connected to the second mounting shaft 53. The second testing head 54 is welded to the outer peripheral wall of the second mounting shaft 53.

[0040] Before conducting the two-point collaborative pressure resistance test, the cylinder 13 and the wearable device are retracted to their initial position using the first electric actuator 31. Then, two sets of six-axis robots 14 are activated, moving the mounting plate 51 and its second detection head 54 to the detection position. Utilizing the robots' multi-degree-of-freedom motion capabilities, precise positioning of any point on the curved screen is achieved, thus enabling accurate coverage of vulnerable areas such as the center, edges, curvature transition zones, and even the top corners of the curved screen. If fine-tuning of the angle of the second detection head 54 is required, the second reduction motor 56 is activated, and the output of the second reduction motor 56... The rotation of the end drives the second mounting shaft 53 to rotate, and the rotation of the second mounting shaft 53 drives the second detection head 54 to rotate, thereby realizing the fine adjustment of the angle of the second detection head 54, so that the detection head can contact the screen in different postures such as vertical, tilted or lateral, simulating impact and compression from different directions. Then, the second electric push rod 55 is activated, and the extension end of the second electric push rod 55 moves, driving the second mounting base 52 and the second detection head 54 to move, and compressing the curved screen at a preset position, thereby realizing two-point coordinated pressure resistance testing of the curved screen, and accurately controlling the contact distance and pressure intensity between the second detection head 54 and the screen. Achieving continuous adjustability from slight contact to strong compression, the two second detection heads 54, through the coordinated control of two sets of six-axis robots 14, can perform pressure detection in diverse position combinations. They can simultaneously act on different areas of the screen center and edge, symmetrically act on the left and right edges, or asymmetrically act on the curvature transition area and apex. This allows for flexible configuration of any two-point positions. In terms of pressure modes, it can perform simultaneous dynamic collision detection at two points to simulate the transient condition of multiple objects impacting the screen simultaneously during movement, as well as continuous static compression detection at two points to simulate creep and stress relaxation behavior under long-term pressure holding. It can also be simplified to standalone operation to achieve single-point dynamic compression or single-point continuous static compression detection. This multi-mode and multi-combination detection capability can systematically reveal the superposition and interference effects of stress waves inside the curved screen under two-point stress coupling, evaluate the influence of different position combinations on the screen failure threshold, provide a complete detection method for the reliability verification of curved screens under complex multi-source stress fields, and reveal the real failure mechanism of the curved screen edge and curvature transition area under two-point stress coupling.

[0041] Reference Figure 1The arm-swing detection component in this embodiment includes a third reduction motor 36. The third reduction motor 36 is bolted to the side wall of the sliding table 11, and its output end is fixedly connected to the placement seat 12. When the third reduction motor 36 is started, the output end of the third reduction motor 36 rotates, causing the placement seat 12 to rotate. The rotation of the placement seat 12 causes the cylinder 13 and the clamped wearable device to rotate synchronously and collide with the first detection head 35. This allows the wearable device to simulate the swinging motion of a human arm and perform arm-swing collision detection, restoring the composite working condition of the curved screen dynamically colliding with external hard objects during the user's walking, running, or arm swinging. This achieves comprehensive coverage of the dynamic collision response of the curved screen under different arm-swing intensities, makes up for the lack of static detection in evaluating motion inertia failure modes, and comprehensively evaluates the reliability of the curved screen.

[0042] Reference Figure 2 and Figure 3 In this embodiment, four sets of first detection heads 35 and two detection heads 54 are spaced apart. The four sets of first detection heads 35 and four sets of second detection heads 54 are respectively spherical detection heads, cylindrical detection heads, conical detection heads, and multi-protrusion detection heads. The four sets of first detection heads 35 are switched via a first mounting shaft 34 and a first reduction motor 45, and the four sets of second detection heads 54 are switched via a second mounting shaft 53 and a second reduction motor 56. This allows the first detection heads 35 and second detection heads 54 to select different shapes of detection heads according to testing requirements. The spherical detection head simulates the collision of rounded hard objects such as door frame edges or table corners with the screen, generating a stress distribution that gradually expands from point contact to surface contact, used to evaluate curved screens. Impact toughness and stress dispersion capability: The cylindrical test head simulates large-area compression to evaluate the overall structural stiffness and resistance to static pressure deformation of the curved screen; the conical test head simulates extreme point impacts such as punctures from sharp objects like key tips or pebble tips to evaluate the fracture toughness and ultimate compressive strength of the curved screen cover glass; and the multi-convex point test head simulates scenarios where multiple points of contact occur simultaneously, such as with a keychain or gravel inside a bag, generating a superimposed interference effect of multiple stress concentration points to evaluate the surface hardness, scratch resistance, and failure modes under multi-point stress coupling of the curved screen. The combined use of these four test heads can comprehensively cover all dimensions of testing scenarios, from macroscopic large-area compression to microscopic point-contact wear, ensuring that the compressive strength test results are highly consistent with real-world usage.

[0043] Reference Figure 1 In order to adjust the position of the wearable device, a second lead screw motor 6 is bolted to the upper end of the base 1 in this embodiment of the application. A connecting block 61 is threaded to the output end of the second lead screw motor 6. The upper end of the connecting block 61 is fixedly connected to the lower end of the sliding table 11. A laser rangefinder 62 is slidably installed on the inner top wall of the placement seat 12.

[0044] The second lead screw motor 6 is started. The output end of the second lead screw motor 6 rotates, driving the connecting block 61, which is threadedly connected to the lead screw, to move along the axis of the lead screw. The movement of the connecting block 61 causes the sliding table 11, the placement seat 12, the cylinder 13, and the wearable device to move horizontally synchronously. The laser rangefinder 62 emits a laser beam towards the first detection head 35 and receives the reflected signal, thereby precisely adjusting the position of the wearable device. This allows the curved screen to automatically follow the angle change of the first detection head 35 and adjust to the optimal detection distance, realizing the linkage control between the angle adjustment of the first detection head 35 and the workpiece position compensation. This ensures that a precise pressure distance can be maintained under different collision detection angles, providing stable contact conditions for dynamic collision detection. In this embodiment, the inner top of the placement seat 12... An electric telescopic rod is horizontally installed on the wall, and the telescopic end of the electric telescopic rod is fixedly connected to the side wall of the laser rangefinder 62. When the first detection head 35 is adjusted in the horizontal direction, the electric telescopic rod is activated. The telescopic end of the electric telescopic rod moves, driving the laser rangefinder 62 to move. In conjunction with the second lead screw motor 6, the laser rangefinder 62 moves along the lead screw axis, realizing a closed-loop follow-up between the angle adjustment of the first detection head 35 and the position adjustment of the wearable device. This ensures the consistency and controllability of the collision contact distance under different detection angles, avoids the blind spot or position deviation caused by the deflection of the detection head, improves the positioning accuracy and repeatability of dynamic collision detection, and further enhances the automation and data reliability of the entire detection process.

[0045] Reference Figure 4 In this embodiment, pressure sensors 7 are embedded in the ends of the rotating shaft 44 near the first mounting base 33 and the telescopic ends of the second electric push rod 55 near the second mounting base 52. When the first detection head 35 contacts the screen, the contact force is transmitted to the rotating shaft 44 through the first mounting base 33, and the pressure sensor 7 collects the force signal in real time. When the second detection head 54 contacts the screen, the contact force is transmitted to the telescopic end of the second electric push rod 55 through the second mounting base 52, and the pressure sensor 7 collects the force signal in real time, thereby accurately measuring the real-time contact force between the first and second detection heads 35 and the screen, providing dynamic compression. The force changes during the process provide high-frequency data acquisition at the millisecond level. Through the feedback signal of pressure sensor 7, it is ensured that the applied pressure accurately reaches the preset value and remains constant. For dynamic collision detection and extrusion detection, pressure sensor 7 can capture the peak force and force rise rate at the moment of collision to evaluate the screen's dynamic impact resistance. For continuous extrusion detection, pressure sensor 7 can record the force decay during long-term pressure holding, revealing the creep characteristics and stress relaxation behavior of the screen material. The synchronous data acquisition of the two pressure sensors 7 can provide complete mechanical data support for analyzing the screen failure mechanism under the two-point stress coupling effect.

[0046] Reference Figure 3 and Figure 4In order to observe and record the process of collision detection and pressure resistance testing of curved screen, industrial cameras 8 are fixedly installed on the first mounting base 33 and the mounting plate 51 in this embodiment of the application. The industrial cameras 8 continuously collect image data during the collision detection and pressure resistance testing process, record the surface morphology changes, crack initiation and propagation process and indentation formation trajectory of the screen during the stress process. For multi-point collaborative pressure testing, the industrial cameras 8 arranged at multiple angles can simultaneously record the stress response and interference effect around the two pressure points from different perspectives, reveal the propagation path and superposition law of stress waves inside the screen, and provide intuitive empirical data for subsequent process improvement and design optimization.

[0047] The implementation principle of the display screen compressive strength testing device in this application is as follows: Start the drive motor 41. The output end of the drive motor 41 rotates, which drives the worm gear 43 to rotate. The worm gear 43 rotates, which drives the worm wheel 42 to rotate. The worm wheel 42 rotates, which drives the rotating shaft 44, the first mounting base 33, and the first detection head 35 to rotate, thereby realizing the angle adjustment of the first detection head 35 in the horizontal direction. Start the first reduction motor 45. The output end of the first reduction motor 45 rotates, which drives the first mounting shaft 34 to rotate. The rotation of the first mounting shaft 34 drives the first detection head 35 on the outer peripheral wall to pitch and swing, thereby realizing the pitch angle adjustment of the first detection head 35 in the vertical plane. First, the cylinder 13 and wearable device are retracted to their initial position using the first electric actuator 31. Then, two sets of six-axis robots 14 are activated, moving the mounting plate 51 and its second detection head 54 to the detection position. Utilizing the robots' multi-degree-of-freedom motion capability, precise positioning of any point on the curved screen is achieved. Next, the second reduction motor 56 is activated, its output rotating to drive the second mounting shaft 53, which in turn rotates the second detection head 54, allowing for fine-tuning of its angle. Finally, the second electric actuator 55 is activated, its telescopic end moving to move the second mounting base 52 and the second detection head 54. The system compresses the curved screen at preset positions, thereby achieving two-point collaborative pressure resistance testing of the curved screen. It can continuously adjust from slight contact to strong compression. Through the collaborative control of two sets of six-axis robots 14, the two second detection heads 54 can perform pressure testing in a variety of position combinations. They can act on different areas of the center and edge of the screen at the same time, or act symmetrically on the left and right edges, or act asymmetrically on the curvature transition area and the top corner. It can achieve flexible configuration of any two-point position. In terms of pressure mode, it can perform dynamic collision detection at two points at the same time, or static compression detection at two points continuously, or it can be simplified to stand-alone operation to achieve single-point dynamic compression or single-point static continuous compression detection. The third reduction motor 36 is started. The output end of the third reduction motor 36 rotates, which drives the placement seat 12 to rotate. The rotation of the placement seat 12 drives the cylinder 13 and the clamped wearable device to rotate synchronously and collide with the first detection head 35, so that the wearable device simulates the swinging motion of the human arm and performs arm collision detection. The four sets of first detection heads 35 are switched via the first mounting shaft 34 and the first reduction motor 45, and the four sets of second detection heads 54 are switched via the second mounting shaft 53 and the second reduction motor 56, so that the first detection heads 35 and the second detection heads 54 can select detection heads of different shapes according to the testing requirements.

[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for testing the compressive strength of a display screen, characterized in that: The device includes a base (1), a sliding platform (11) is slidably disposed on the upper end of the base (1), a placement seat (12) is rotatably disposed on the side wall of the sliding platform (11), a cylinder (13) is slidably disposed on the side wall of the placement seat (12) away from the sliding platform (11), a clamping component (2) for clamping the wearable device is disposed on the inner peripheral wall of the cylinder (13), and two sets of six-axis robots (14) are symmetrically disposed on the side of the base (1) away from the sliding platform (11). Both the output end of the two sets of six-axis robots (14) and the base (1) are provided with a pressure detection mechanism (3) for collision detection and two-point collaborative pressure detection of the curved screen of the wearable device.

2. The display screen compressive strength testing device according to claim 1, characterized in that: The clamping assembly (2) includes a first lead screw motor (21), a first gripper (22), and a second gripper (23). The first lead screw motor (21) is fixedly disposed on the inner peripheral wall of the cylinder (13). The lead screw of the first lead screw motor (21) includes a first threaded section and a second threaded section, and the first threaded section and the second threaded section are symmetrically arranged. A sliding groove (24) is provided on the inner peripheral wall of the cylinder (13). The first gripper (22) and the second gripper (23) are both slidably disposed in the sliding groove (24). The first gripper (22) is threadedly connected to the first threaded section, and the second gripper (23) is threadedly connected to the second threaded section.

3. The display screen compressive strength testing device according to claim 1, characterized in that: The pressure resistance testing mechanism (3) includes a first electric push rod (31), a mounting box (32), a first mounting seat (33), a first mounting shaft (34), a first detection head (35), an angle adjustment component (4), a two-point collaborative detection component (5), and a swing arm detection component. The first electric push rod (31) is vertically arranged at the upper end of the placement seat (12), and its telescopic end is fixedly connected to the cylinder (13). The mounting box (32) is arranged at the upper end of the base (1) and is located between the two sets of six-axis robots (14). The first mounting seat (33) is arranged at the upper end of the mounting box (32). The mounting shaft (34) is rotatably mounted on the inner side wall of the first mounting base (33), the first detection head (35) is mounted on the outer peripheral wall of the first mounting shaft (34), the angle adjustment component (4) is mounted in the mounting box (32) and is used to adjust the angle of the first detection head (35), the two-point collaborative detection component (5) is symmetrically mounted on the output ends of the two sets of six-axis robots (14) and is used to perform two-point collaborative pressure resistance detection on the curved screen of the wearable device, and the swing arm detection component is mounted on the side wall of the sliding table (11) and is used to perform swing arm collision detection on the curved screen of the wearable device.

4. The display screen compressive strength testing device according to claim 3, characterized in that: The angle adjustment assembly (4) includes a drive motor (41), a worm gear (42), a worm (43), a rotating shaft (44), and a first reduction motor (45). The drive motor (41) is disposed on the side wall of the mounting box (32), and its output end is disposed through the side wall of the mounting box (32). The worm (43) is fixedly connected to the output end of the drive motor (41). The rotating shaft (44) is rotatably disposed on the inner top wall of the mounting box (32) and is fixedly connected to the lower end of the first mounting seat (33). The worm gear (42) is sleeved on the outer peripheral wall of the rotating shaft (44) and meshes with the worm (43). The first reduction motor (45) is disposed on the side wall of the first mounting seat (33), and its output end is fixedly connected to the first mounting shaft (34).

5. The display screen compressive strength testing device according to claim 4, characterized in that: The two-point collaborative detection component (5) includes a mounting plate (51), a second mounting base (52), a second mounting shaft (53), a second detection head (54), a second electric push rod (55), and a second geared motor (56). The mounting plate (51) is disposed on the output end of the six-axis robot (14). The second electric push rod (55) is disposed on the mounting plate (51), and its telescopic end passes through the mounting plate (51). The second mounting base (52) is disposed on the telescopic end of the second electric push rod (55). The second mounting shaft (53) is rotatably disposed on the inner side wall of the second mounting base (52). The second geared motor (56) is disposed on the side wall of the second mounting base (52), and its output end is fixedly connected to the second mounting shaft (53). The second detection head (54) is disposed on the outer peripheral wall of the second mounting shaft (53).

6. The display screen compressive strength testing device according to claim 3, characterized in that: The swing arm detection component includes a third reduction motor (36), which is disposed on the side wall of the sliding table (11) and its output end is fixedly connected to the placement seat (12).

7. The display screen compressive strength testing device according to claim 5, characterized in that: The first detection head (35) and the second detection head (54) are each provided with four sets at intervals, and the four sets of first detection heads (35) and the four sets of second detection heads (54) are respectively spherical detection heads, cylindrical detection heads, conical detection heads and multi-protrusion detection heads.

8. The display screen compressive strength testing device according to claim 1, characterized in that: The upper end of the base (1) is provided with a second lead screw motor (6), and the output end of the second lead screw motor (6) is threaded with a connecting block (61). The upper end of the connecting block (61) is fixedly connected to the lower end of the sliding table (11). A laser rangefinder (62) is slidably provided on the inner top wall of the placement seat (12) along the width direction.

9. The display screen compressive strength testing device according to claim 5, characterized in that: Pressure sensors (7) are embedded in the end of the rotating shaft (44) near the first mounting base (33) and the end of the telescopic end of the second electric push rod (55) near the second mounting base (52).

10. A display screen compressive strength testing device according to claim 5, characterized in that: Both the first mounting base (33) and the mounting plate (51) are equipped with industrial cameras (8) for observing and recording the collision detection and pressure resistance detection process of the curved screen of the wearable device.

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