Bending test device and test method

Abstract

The invention provides a bending test device and method, and the device is used for carrying out the bending test of a to-be-tested object, and the device comprises a cabin body, the interior of the cabin body is provided with a cabin, and the bottom of the cabin body is provided with a bearing platform; the environment control device is used for at least regulating and controlling the air pressure, the humidity, the temperature and the illumination radiation in the cabin, so that the test environment in the cabin simulates different climatic environments; the bending mechanism is arranged on the bearing table in the cabin and is used for bending the object to be tested; and the detection mechanism is used for detecting the aging state of the bent object to be detected. According to the bending test device provided by the embodiment of the invention, the external environment can be simulated, the change state of the to-be-tested object in the bending process can be monitored, and the accuracy and the reliability of a bending test result are improved.

Description

Technical Field

[0001] The present application relates to the field of bending technology, and in particular to a bending test device and a test method. Background Art

[0002] With the development of economy and technology, the application of display screens is becoming more and more extensive. With the birth of flexible screens, they are widely used in various electronic devices because of their bendability and good flexibility. Compared with traditional screens, they are thin and light, have low power consumption, and are more durable. Especially after the advent of foldable electronic products, the challenges to the bending performance of flexible screens are getting higher and higher. Before these electronic products or flexible screens leave the factory, they need to be tested by bending test equipment to ensure the bending resistance of the flexible screen, and then ensure the product yield of the finished flexible display screen.

[0003] At present, the traditional single-axis test device is still used for testing flexible screens, which has low test efficiency. There is also a lack of corresponding research on the environmental stress of bending, and the evaluation and measurement rely on manual subjective judgment, lacking quantitative and objective test methods. This test method seriously affects the test results of the reliability of the bending characteristics of the screen, and the test efficiency is low. Summary of the invention

[0004] In view of this, the present application provides a bending test device to solve the problems of low reliability of test results and low test efficiency.

[0005] Some embodiments of the present application provide a bending test device. The present application is introduced from multiple aspects below, wherein the embodiments and beneficial effects of the multiple aspects can be referenced to each other.

[0006] In the first aspect, the present application provides a bending test device for performing a bending test on an object to be tested, comprising a cabin body, a chamber formed inside the cabin body, and a supporting platform at the bottom of the cabin body; an environmental control device for regulating at least the air pressure, humidity, temperature, and light radiation inside the cabin body so that the test environment inside the cabin body simulates different climate environments; a bending mechanism, arranged on the supporting platform in the cabin body, for bending the object to be tested; and a detection mechanism for detecting the aging state of the object to be tested after bending.

[0007] According to the bending test device of the embodiment of the present application, the test environment in the cabin is regulated by the environmental control device, and the influence of environmental factors on the test results is eliminated, thereby improving the reliability of the test results. The detection mechanism automatically detects the changes of the object to be tested during the bending process, and the whole process is monitored, which is convenient for analyzing the comprehensive indicators of the object to be tested. The obtained detection data is more objective than the subjective evaluation of personnel, further improving the reliability and accuracy of the test results.

[0008] As an embodiment of the first aspect of the present application, the bending mechanism includes: a bracket, which is arranged on a supporting platform; a rotating shaft extending in a first direction, which is rotatably mounted on the bracket; a bending arm, which includes a first arm extending in the first direction and a second arm extending in the second direction, wherein an angle is formed between the first direction and the second direction, and the two ends of the second arm are respectively connected to the first arm and the rotating shaft, and the first arm is used to fix the object to be tested; a driving mechanism, which is connected to the rotating shaft and is used to drive the rotating shaft to rotate, so that the bending arm drives a part of the object to be tested to bend in the direction where another part is located. The structure is simple, easy to integrate, and can realize the bending of the folding device.

[0009] As an embodiment of the first aspect of the present application, there are two bending arms, which are respectively arranged on both sides of the rotating shaft; there is one driving mechanism, which is connected to the rotating shaft between the two bending arms through a conveyor belt. This structure can drive the two bending arms to rotate through one driving mechanism, that is, realize the simultaneous detection of two objects to be tested, which can improve the detection efficiency.

[0010] As an embodiment of the first aspect of the present application, the bending mechanism further includes: a first fixing plate for fixing the object to be tested, the first fixing plate being arranged on the bracket and being arranged opposite to the bending arm, so that a part of the object to be tested is fixed and another part is rotated to achieve bending.

[0011] As an embodiment of the first aspect of the present application, a mounting component for fixing the object to be tested is provided on the first arm, and the mounting component includes: a base, one end of the base is connected to the first arm, and a U-shaped groove is provided on the base, and the open end of the U-shaped groove faces the first fixed plate; a mounting plate for fixing the object to be tested, one end of the mounting plate is provided with a roller, and the roller is arranged in the U-shaped groove, and rolls in the U-shaped groove under the push or pull of the mounting plate; the axis of the roller is parallel to the axis of the rotating shaft. This structure can release the XY degree of freedom and avoid the extrusion stress caused by the deviation of the installed axis.

[0012] As an embodiment of the first aspect of the present application, the rotating shaft includes: a first rotating shaft and a second rotating shaft arranged along a third direction, the third direction being a direction perpendicular to the axis of the rotating shaft; first bending arms are respectively provided on both sides of the first rotating shaft, and the first bending arms are used to fix the first end of the object to be tested; second bending arms are respectively provided on both sides of the second rotating shaft, and the second bending arms are used to fix the second end of the object to be tested; wherein each second bending arm corresponds to a first bending arm, and the first bending arm and the second bending arm have the same rotation direction, and the rotation strokes do not overlap. This structure can realize the bending of the double-axis folded object to be tested, and the bending test can be realized by fixing the middle part.

[0013] As an embodiment of the first aspect of the present application, the driving mechanism includes: a first driving mechanism connected to the first rotating shaft, used to drive the first rotating shaft to drive the first bending arm to rotate; a second driving mechanism connected to the second rotating shaft, used to drive the second rotating shaft to drive the second bending arm to rotate. This structure has a small overall size, and through one motor to two, the driving shaft is reused to simplify the structure. In addition, the speed and rotation angle of the motor can be adjusted to meet the test requirements.

[0014] As an embodiment of the first aspect of the present application, the object to be tested includes a first part, a second part and a third part, and a first rotating joint and a second rotating joint connecting the three parts; the bending mechanism includes: a second fixing plate for fixing the first part; an ejection mechanism, the ejection mechanism is arranged on the support platform, and is used to lift the second part so that the second part moves relative to the first part around the first rotating joint and / or moves relative to the third part around the second rotating joint; a pulling and closing mechanism, the pulling and closing mechanism is used to fix the third part and apply force to the third part so that it moves relative to the second part around the second rotating joint. The structure is simple, and the bending of the folding machine with multiple degrees of freedom is achieved by means of a driving shaft, and the form is simpler and more flexible.

[0015] As an embodiment of the first aspect of the present application, the pulling and closing mechanism includes: a slide plate, which is slidably arranged on the support platform; an elastic arm, one end of which is connected to the slide plate, and the other end of which is used to fix the third part of the object to be tested; and a third driving mechanism, which is connected to the slide plate and is used to drive the slide plate to slide along the support platform. Since the elastic arm has a certain elasticity and can bend a certain curvature, it can be equivalent to a multi-axis mechanism.

[0016] As an embodiment of the first aspect of the present application, the object to be tested includes a first part, a second part and a third part, and a first rotating joint and a second rotating joint connecting the three parts; the bending mechanism includes: a support frame, provided with a clamping portion for fixing the first part; a primary rotating pair, mounted on the support frame and connected to the second part, the axis of the primary rotating pair is used to align with the axis of the first rotating joint; a secondary rotating pair, rotatably connected to the primary rotating pair and used to fix the third part, the axis of the secondary rotating pair is used to align with the axis of the second rotating joint; a fourth driving mechanism is connected to the primary rotating pair, used to drive the primary rotating pair to drive the secondary rotating pair to rotate. The structure realizes the control of the movement of the bending product by designing an external multi-degree-of-freedom auxiliary structure, and realizes the movement control of multiple motion axes for a passive, non-driven S-shaped folding product with a connecting rod mechanism by externally hanging a multi-degree-of-freedom mechanism.

[0017] As an embodiment of the first aspect of the present application, the bending mechanism includes: a translation track, the translation track is fixed on the bearing platform; a fixed shaft, fixed at one end of the translation track, used to fix one end of the object to be tested; a rotation shaft, arranged on the translation track, used to rotate to roll up or pull apart the object to be tested; a driving member, driving the rotation shaft to slide along the translation track to make the rotation shaft approach or move away from the fixed shaft. This structure can simulate the bending behavior of a person, and pull and close the curling screen at one time, which is in line with the user's usage behavior.

[0018] As an embodiment of the first aspect of the present application, a plurality of bending mechanisms are provided, and the plurality of bending mechanisms are arranged in an array on the vehicle-mounted platform, which has a high degree of integration and can detect a plurality of objects to be detected at the same time, thereby improving detection efficiency.

[0019] As an embodiment of the first aspect of the present application, the detection mechanism includes: a camera, the camera is facing the bending mechanism, and is used to obtain an image of the object to be tested after being bent; a processor, connected to the camera, is used to obtain the image, and analyze the aging state of the object to be tested after being bent based on the image; a monitoring station, connected to the processor, is used to display the results of the aging state. The aging state of the object to be tested can be monitored in real time, which is convenient for the test operator to observe, and further improves the reliability of the test results, and greatly improves the test efficiency.

[0020] In the second aspect, the present application also provides a bending test method, which is applied to the bending test device of the first aspect embodiment, and the method includes: the environment control device adjusts the test environment inside the cabin according to the test requirements; the bending mechanism bends the object to be tested according to the test requirements; the detection mechanism obtains the image of the object to be tested after bending, and detects the aging state of the object to be tested after bending based on the image. The test method of the embodiment of the present application has reliable test results and high test efficiency.

[0021] As an embodiment of the second aspect, the aging state of the object to be tested after being bent is detected based on an image, including: marking the corner points of the image; finding the region of interest in the image based on the corner points; inverting the region of interest and binarizing the abnormal region; and judging the aging state of the object to be tested after being bent based on the abnormal region. After image processing, the surface aging of the object to be tested can be accurately measured from the appearance, and the test results are objective and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of a bending test device provided in an embodiment of the present application;

[0023] Figure 2 Partial exemplary structure of the integrated bending test device provided in the embodiment of the present application Figure 1 ;

[0024] Figure 3Partial exemplary structure of the integrated bending test device provided in the embodiment of the present application Figure 2 ;

[0025] Figure 4 The exemplary structure of the object to be tested provided in the embodiments of the present application;

[0026] Figure 5 An exemplary structural diagram of a first bending mechanism provided in an embodiment of the present application;

[0027] Figure 6 An exemplary structure of another angle of the bending mechanism provided in the embodiment of the present application;

[0028] Figure 7 An exemplary structure of a mounting component provided in an embodiment of the present application;

[0029] Figure 8 An exemplary structural diagram of a second bending mechanism provided in an embodiment of the present application;

[0030] Fig. 9 An exemplary structural diagram of a third bending mechanism provided in an embodiment of the present application;

[0031] Fig.10 The embodiment of the present application provides Fig. 9 A schematic diagram of state changes of a biaxial foldable mobile phone bent by a third bending mechanism is shown;

[0032] Fig.11 For the embodiment of this application Fig. 9 A schematic structural diagram of a pulling and closing mechanism of a third bending mechanism is provided;

[0033] Fig.12 A schematic diagram of N equivalent passive joints of the elastic arm provided in an embodiment of the present application;

[0034] Fig.13 An exemplary structural diagram of a fourth bending mechanism provided in an embodiment of the present application;

[0035] Fig.14 For the embodiment of this application Fig.13 A schematic diagram of the structure of the fourth bending mechanism provided being connected to the biaxial folding mobile phone;

[0036] Fig.15 An exemplary structural diagram of a fifth bending mechanism provided in an embodiment of the present application;

[0037] Fig.16 An exemplary structural diagram of a sixth bending mechanism provided in an embodiment of the present application;

[0038] Fig.17 A flow chart of data transmission of a bending test system provided in an embodiment of the present application;

[0039] Fig.18 A schematic diagram of the structure of a multi-fold screen provided in an embodiment of the present application;

[0040] Fig.19 A flow chart of the status analysis of the screen by the detection mechanism provided in an embodiment of the present application.

[0041] Reference numerals:

[0042] Bending test device 100;

[0043] Cabin 110; Cabin 111; Carrying platform 112; Testing station 113;

[0044] Bending mechanism 120;

[0045] first bending mechanism 121; bracket 1211; rotating shaft 1212; bending arm 1213; first arm 1213a; second arm 1213b; mounting component 1213c; base c1; U-shaped groove c11; mounting plate c2; roller c21; driving mechanism 1214; first fixing plate 1215; first bearing 1216; second bearing 1217;

[0046] The second bending mechanism 122; the first bracket 1221; the first rotating shaft 1222; the first bending arm 1223; the first driving mechanism 1224; the second bracket 1225; the second rotating shaft 1226; the second bending arm 1227; the second driving mechanism 1228;

[0047] The third bending mechanism 123; the second fixing plate 1231; the ejection mechanism 1232; the pulling and closing mechanism 1233; the slide rail 1233a; the slide plate 1233b; the elastic arm 1233c; the third driving mechanism 1233d;

[0048] Fourth bending mechanism 124; support frame 1241; primary rotation pair 1242; secondary rotation pair 1243; fourth driving mechanism 1244; clamping portion 1245;

[0049] The fifth bending mechanism 125; the translation track 1251; the fixed shaft 1252; the rotation shaft 1253; the driving member 1254;

[0050] The sixth bending mechanism 126; the third rotating shaft 1261; the third bending arm 1262; the fifth driving mechanism 1263; the fourth rotating shaft 1264; the fourth bending arm 1265; the sixth driving mechanism 1266;

[0051] Detection mechanism 130; camera 131;

[0052] Object to be tested: 200;

[0053] Single-axis folding mobile phone 210; first screen 211; second screen 212; rotation axis 213;

[0054] Double-axis folding mobile phone 220; first folding screen 221; second folding screen 222; third folding screen 223; first rotating joint 224; second rotating joint 225. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0056] To facilitate the understanding of the technical solution of the present application, the technical problem to be solved by the present application is first explained.

[0057] In some embodiments, the bending test equipment includes at least one bearing component, and the bearing component includes a horizontal fixed part and two movable parts that are rotatably connected to both sides of the horizontal fixed part. The movable part has the freedom of movement to flip up and down relative to the horizontal fixed part to achieve the test of the bending reliability of the wing-type bending sample. However, this bending test equipment does not take into account the test environment factors. Since the user may be in different environments when actually using the object to be tested, for example, under different air pressure, humidity, temperature and light radiation factors, there will be large differences in the performance changes of the product after use. Therefore, if there is no test combined with actual environmental factors, the reliability of the test results will be reduced. In addition, each time the equipment bends the object to be tested multiple times, it needs to rely on the subjective judgment of the tester's naked eye observation, which not only affects the reliability of the test results, but also has low test efficiency.

[0058] Based on the above technical problems, the embodiment of the present application provides a bending test device, which can simulate the external environment by setting components such as a cabin, an environmental control device and a detection mechanism, and the connection relationship between the components, so that the bending test device can take environmental factors into consideration when bending the object to be tested, thereby improving the reliability of the test. In addition, during the bending process of the object to be tested, the device automatically monitors the object to be tested to detect the performance change state of the folding product, and can standardize the evaluation of the crease area, so that the test results are reliable and the test efficiency is greatly improved.

[0059] The bending test device of the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0060] refer to Figure 1 , Figure 1 The overall structural schematic diagram of the bending test device 100 provided in an embodiment of the present application is shown.

[0061] like Figure 1As shown, the bending test device 100 includes a cabin 110, an environmental control device (not shown), a bending mechanism and a detection mechanism. A cabin 111 is formed inside the cabin 110, and the cabin 111 can be in an airtight state. The bottom of the cabin 110 is a support platform 112. The bending mechanism is arranged on the support platform 112 in the cabin 111, and can bend the object to be tested. The detection mechanism can automatically detect the aging state of the object to be tested after bending. Among them, the environmental control device can regulate the air pressure, humidity, temperature, and light radiation inside the cabin 111, so that the test environment inside the cabin 111 simulates different external climate environments.

[0062] The bending test device 100 of the embodiment of the present application realizes the regulation of the test environment in the cabin 111 through the environmental control device, that is, eliminates the influence of environmental factors on the test results, thereby improving the reliability of the test results. The detection mechanism automatically detects the changes in the object to be tested during the bending process, realizes the monitoring of the whole process, and facilitates the analysis of the comprehensive indicators of the object to be tested. And the obtained detection data is more objective than the subjective evaluation of personnel, further improving the reliability and accuracy of the test results.

[0063] In some embodiments, the environmental control device may include a heating component, a humidifying component, a pressurizing component, a light source, and various sensors for monitoring the internal environment of the cabin 111. These components may be connected to a controller. Based on the test environment in the cabin 111 detected by the sensor and the environmental conditions that need to be simulated in the test requirements, the controller may control the start and stop of the heating component to adjust the temperature in the cabin 111; control the start and stop of the humidifying component to control the humidity in the cabin 111; control the start and stop of the light source to regulate the light radiation; control the start and stop of the air pressure component to regulate the air pressure in the cabin 111, etc. The specific structures of these components can refer to the specific structures in the prior art, and will not be illustrated one by one in the embodiments of the present application.

[0064] In some embodiments, Figure 1As shown, the detection mechanism may include a camera 131, a processor (not shown) and a monitoring station (not shown). The processor is connected to the camera and the monitoring station respectively. The camera 131 faces the bending mechanism 120, so that the image of the object to be tested 200 after bending can be obtained. After the camera 131 obtains the image, it sends the image to the processor, and the processor analyzes the aging state of the object to be tested after bending based on the image, for example, touch changes (TOE cracks), small black spots on the screen (screen package cracking), broken bright spots on the screen (TFT cracking), screen bubbles and Peeling (large-scale Peeling initial state), etc. After the monitoring station obtains the aging state data, the result of the aging state is displayed on the display screen, which is convenient for the tester to understand the aging state of the object to be tested in real time. This test method can monitor the aging state of the object to be tested in real time, which is convenient for the test operator to observe, and further improves the reliability of the test results, and greatly improves the test efficiency.

[0065] In an embodiment of the present application, the number of cameras 131 can be set according to the number of tests of the objects under test 200. One object under test can correspond to one camera or multiple cameras to ensure that changes in each object under test during the folding process can be captured to improve test accuracy.

[0066] In an embodiment of the present application, a plurality of bending mechanisms 120 may be disposed inside the chamber 111 . The plurality of bending mechanisms 120 are integrated together to simultaneously measure a plurality of objects to be tested, thereby improving test efficiency.

[0067] refer to Figure 2 , Figure 2 The partial exemplary structure of the integrated bending test device 100 provided in the embodiment of the present application is shown. Figure 1 .like Figure 1 and Figure 2 As shown, four test stations 113 are arranged on the carrier 112, and a bending mechanism can be arranged on each test station 113. These bending mechanisms can have the same structure or different structures. The integrated bending test device 100 of the embodiment of the present application can effectively improve the test efficiency.

[0068] Furthermore, in some embodiments, Figure 1 and Figure 2 The bending mechanism 120 and the support platform 112 are detachably connected. In actual use, different bending mechanisms 120 can be replaced according to test needs to improve the overall test flexibility of the bending test device 100.

[0069] It is understandable that the above Figure 2The test stations 113 in the illustrated embodiment are described by taking 4 test stations as an example. In some embodiments, there may be 2 test stations 113, 3 test stations 113, or more test stations 113, etc. The present application does not limit the number of test stations 113.

[0070] refer to Figure 3 , Figure 3 The partial exemplary structure of the integrated bending test device 100 provided in the embodiment of the present application is shown. Figure 2 .like Figure 3 As shown, two test stations 113 are provided on the carrier 112, wherein each test station 113 is provided with a bending mechanism 120. In actual measurement, the following can be selected as needed: Figure 3 As shown in , the structures of the two bending mechanisms 120 may have the same structure. In some embodiments, bending mechanisms 120 with different structures may also be installed on each station to test objects with different structures.

[0071] In the following embodiments, the bending mechanism 120 of the embodiment of the present application will be described in conjunction with the accompanying drawings.

[0072] The bending mechanism 120 of the embodiment of the present application is used to repeatedly bend the object to be tested. The object to be tested may be a flexible screen or an electronic device equipped with a flexible screen. In some embodiments, the object to be tested may also be a component of other materials, such as a sheet of metal material, etc. The present application does not limit the material, shape, etc. of the object to be tested.

[0073] In the following embodiments, the object to be tested is an electronic device equipped with a flexible screen as an example for description. The electronic device may be a folding mobile phone, a tablet personal computer, an e-book reader, a laptop computer, a personal digital assistant (PDA), a personal computer, a notebook, a vehicle-mounted device, a wearable device (such as a watch), a box, and other electronic devices that need to be opened and closed. The folding mobile phone is introduced as an example of the object to be tested.

[0074] The specific structure and working principle of the bending mechanism 120 in the embodiment of the present application are described below in conjunction with the accompanying drawings.

[0075] Before describing the specific structure of the bending mechanism 120, the structures of several conventional folding mobile phones are first summarized.

[0076] refer to Figure 4 , Figure 4An exemplary structure of the object to be tested according to an embodiment of the present application is exemplified.

[0077] in, Figure 4 (a) is a schematic diagram of the rotation of the single-axis foldable mobile phone 210 around the axis. Figure 4 As shown in (a), the single-axis folding mobile phone 210 includes a first screen 211, a second screen 212 and a hinge device. Among them, the first screen 211 and the second screen 212 are rotatably connected by a hinge device. In the embodiment of the present application, the hinge device is a rotating axis 213 around which the two screens rotate. In different usage scenarios, the user can open or fold the two screens to achieve different usage states of the single-axis folding mobile phone 210. When the foldable mobile phone is changed from a folded state to a fully opened state, the rotation angle between the two screens can change from 0° to 180°. When designing the bending mechanism, based on the specific structure of the single-axis folding mobile phone 210, a bending mechanism for a single-axis test can be designed.

[0078] Figure 4 (b) is a schematic diagram of the rotation of the dual-axis foldable mobile phone 220 around the axis. Figure 4 As shown in (b), the dual-axis folding mobile phone 220 includes a first folding screen 221 (first part), a second folding screen 222 (second part), a third folding screen 223 (third part), a first rotating joint 224 and a second rotating joint 225. Among them, the first folding screen 221 and the second folding screen 222 are rotationally connected through the first rotating joint 224, and the second folding screen 222 and the third folding screen 223 are rotationally connected through the second rotating joint 225. In the embodiment of the present application, the first rotating joint 224 and the second rotating joint 225 are formed into a double axis. In different usage scenarios, the user can open or fold the three screens to achieve different usage states of the dual-axis folding mobile phone 220. When the foldable mobile phone is folded from a fully opened state, the corresponding rotation angle between each two screens can change from 0° to 180°. When designing the bending mechanism, based on the specific structure of the dual-axis folding mobile phone 220, a bending mechanism for dual-axis testing can be designed.

[0079] Those skilled in the art can understand that the opening angle of the foldable mobile phone can also be 90°, 120°, 210°, etc. Moreover, the above embodiment is described by taking two axes as an example, in some embodiments, there can also be more than three axes, etc., and the present application does not limit this.

[0080] It is understandable that, in the actual test process, the bending mechanism 120 can be selected according to the specific structure of the folding mobile phone. For example, when testing a single-axis folding mobile phone 210, a bending mechanism for measuring a single-axis object to be tested 200 can be selected, and when testing a double-axis folding mobile phone 220, a bending mechanism for testing an S-shaped double-axis object to be tested 200 can be selected. The bending mechanism can be disassembled or installed as needed during use.

[0081] In the following embodiments, bending mechanisms of different structures are described respectively. To facilitate the distinction between the various bending mechanisms, in the following embodiments, the bending mechanisms are named in the order of the first bending mechanism, the second bending mechanism, the third bending mechanism, etc.

[0082] refer to Figure 5 , Figure 5 FIG. 1 shows an exemplary structural diagram of a first bending mechanism 121 provided in an embodiment of the present application. The first bending mechanism 121 is applied to Figure 4 The dual-axis folding mobile phone 220 shown in (a) is shown in FIG. Figure 5 As shown, the first bending mechanism 121 includes a bracket 1211, a rotating shaft 1212, a bending arm 1213 and a driving mechanism 1214. The bracket 1211 is arranged on a supporting platform (such as Figure 1 The rotating shaft 1212 is rotatably mounted on the bracket 1211. Figure 5 As shown, the bending arm 1213 includes a first arm 1213a extending in a first direction and a second arm 1213b extending in a second direction. The two ends of the second arm 1213b are respectively connected to the first arm 1213a and the rotating shaft 1212. The rotating shaft 1212 is connected to the driving mechanism 1214, and the driving mechanism 1214 can drive the rotating shaft 1212 to rotate so as to drive the bending arm 1213 to rotate around the rotating shaft 1212. The direction of the axis of the rotating shaft 1212 is the first direction, and the angle between the first direction and the second direction is 90°. In some embodiments, the angle can be less than 90° or greater than 90°.

[0083] It can be understood that the second direction in the present application is not a fixed direction, but a direction that can rotate around the rotating shaft 1212. The second direction intersects with the axial direction and is arranged around the axis of the rotating shaft 1212.

[0084] like Figure 5 As shown, the first bending mechanism 121 is used to fold the single-axis mobile phone (such as Figure 4 In the bending test, the rotating shaft 213 of the uniaxial folding mobile phone is aligned with the axis of the rotating shaft 1212 of the bending mechanism, and then the first screen (such as Figure 4The first screen 211 shown in (a) in FIG. 1 and the same below) is fixed, and the second screen (such as Figure 4 One end of the second screen 212 shown in (a) of FIG. 1 and the same below) is fixedly connected to the first arm 1213a of the bending arm 1213. When the driving mechanism 1214 is turned on, the positive direction (such as the set positive direction) is set. Figure 5 The rotating shaft 1212 rotates in the counterclockwise direction shown in the figure, and the rotating shaft 1212 rotates, and the rotating shaft 1212 drives the bending arm 1213 to rotate, so that the first arm 1213a drives the first screen 211 to bend toward the second screen 212. When the bending angle reaches the set angle, for example, a bending of 180°, the driving mechanism 1214 rotates in the reverse direction, driving the rotating shaft 213 to rotate in the reverse direction (opposite to the forward rotation direction) to return the first screen to its original position, and so on, multiple bending of the mobile phone is achieved.

[0085] In some embodiments, Figure 5 As shown, the bending arms 1213 include two symmetrically arranged left and right. The two bending arms 1213 can use a section of the middle of the rotating shaft 1212 as a dividing line and are respectively arranged on both sides of the rotating shaft 1212 in the region. A driving mechanism 1214 is provided, and the driving mechanism 1214 can be connected to an end region in the middle of the rotating shaft 1212 to achieve a one-to-two mode, and drive the two bending arms to rotate at the same time, which not only has a simple structure, but also can improve the working efficiency of the bending mechanism.

[0086] like Figure 5 As shown, a first bearing 1216 may be provided in the middle of the rotating shaft 1212, and the driving mechanism 1214 includes a second bearing 1217, and the two bearings may be connected by a conveyor belt. When the driving mechanism 1214 drives the second bearing 1217 to rotate, the first bearing 1216 is driven to rotate by the conveyor belt to realize the rotation of the rotating shaft 1212, and then the bending arm 1213 is rotated. In the following embodiments, when the driving mechanism drives the rotating shaft to rotate, this connection mode can be adopted, and it will not be described one by one hereafter.

[0087] refer to Figure 6 , Figure 6 Shows Figure 5 Another exemplary structure of the bending mechanism is shown.

[0088] like Figure 6 As shown, the bending mechanism 121 also includes a first fixing plate 1215, which can fix the mobile phone to be tested, or a clamping plate used to fix the mobile phone or display screen. The first fixing plate 1215 is arranged on the bracket 1211 and is arranged opposite to the bending arm 1213. When the second screen 212 of the single-axis folding mobile phone 210 is fixed on the first fixing plate 1215, the first arm 1213a of the bending arm 1213 can fix the second screen 212. The firmness of the mobile phone fixation is improved.

[0089] like Figure 6 As shown, a mounting component 1213c is provided on the first arm 1213a, and the mounting component 1213c can fix the first screen of the single-axis foldable mobile phone. The mounting component 1213c includes a base c1 and a mounting plate c2. One end of the base c1 is connected to the first arm 1213a. The mounting plate c2 is used to connect to the first screen to facilitate the fixing of the first screen.

[0090] refer to Figure 6 and Figure 7 , Figure 7 FIG. 1 shows an exemplary structure of the mounting component 1213c provided in an embodiment of the present application. Figure 6 and Figure 7 As shown, the base c1 is provided with a U-shaped groove c11, and the open end of the U-shaped groove c11 faces the first fixing plate 1215. A roller c21 is provided at one end of the mounting plate c2, and the roller c21 is arranged in the U-shaped groove c11. The axis of the roller c21 is parallel to the axis of the rotating shaft 1212. When the driving mechanism 1214 drives the bending arm 1213 to rotate, if the rotating axis of the mobile phone (such as Figure 4 There is a deviation between the rotating axis 213 of (a) and the rotating axis 1212 of the bending mechanism, that is, when the axes are not aligned, the mounting plate c2 will push or pull the roller c21 to roll in the U-shaped groove c11 to compensate for the misalignment of the axes. The bending mechanism applies mechanical stress to the mobile phone under test, affecting the test results.

[0091] It can be understood that the axis of the roller c21 is relatively parallel to the axis of the rotating shaft 1212. In some embodiments, if the space of the U-shaped groove c11 is large enough, the axis of the roller c21 and the axis of the rotating shaft 1212 can also form an angle within a controllable range. As long as the roller c21 moves in the U-shaped groove c11 and does not have unnecessary mechanical collision with other components, it can buffer the mechanical stress caused by the misalignment of the axis of the rotating shaft 1212 of the mobile phone and the rotating shaft 1212 of the bending mechanism, and ensure that other components are not damaged.

[0092] The first bending mechanism 121 of the embodiment of the present application adopts a half-fixed, generally bent form, and the U-shaped design of the fork of the mounting component 1213c can release the XY degrees of freedom and avoid the extrusion stress caused by the deviation of the mounting axis. This structure is suitable for the form of the whole machine and the screen monomer.

[0093] In the above embodiment, the bending mechanism test for a single-axis folding mobile phone is described. In the following embodiment, the bending mechanism test for a double-axis folding mobile phone (reference Figure 4 The bending mechanism of the dual-axis folding mobile phone 220 shown in (b) (the same below) is explained.

[0094] refer to Figure 8 , Figure 8 FIG. 1 shows an exemplary structural diagram of the second bending mechanism 122 provided in an embodiment of the present application. The second bending mechanism 122 is applied to Figure 4 The dual-axis folding mobile phone 220 shown in (b) of FIG. Figure 8 (a) is a schematic diagram of the three-dimensional structure of the second bending mechanism 122, Figure 8 (b) is a schematic structural diagram of the second bending mechanism 122 at another angle.

[0095] like Figure 8 As shown in (a) in FIG. 8 and (b) in FIG. 8 , the direction of the axis of the rotating shaft is the first direction, the third direction is the direction perpendicular to the axis of the rotating shaft, the second direction intersects with the first direction, and the second direction is a variable direction, that is, the direction that can rotate around the rotating shaft, that is, the second direction can sometimes be parallel to the third direction, and sometimes intersect with the third direction.

[0096] like Figure 8 As shown in (a) of FIG. 8 and (b) of FIG. 8 , the second bending mechanism 122 includes two groups of mechanisms, and the first group of mechanisms includes a first bracket 1221, a first rotating shaft 1222, two first bending arms 1223 and a first driving mechanism 1224. The first rotating shaft 1222 is mounted on the first bracket 1221. Each first bending arm 1223 includes a third arm extending in the first direction and a fourth arm extending in the second direction, and the two ends of the fourth arm are respectively connected to the third arm and the first rotating shaft 1222. The first rotating shaft 1222 is connected to the first driving mechanism 1224, and the first driving mechanism 1224 can drive the first rotating shaft 1222 to rotate so as to drive the first bending arm 1223 to rotate around the first rotating shaft 1222.

[0097] like Figure 8 (a) and Figure 8 As shown in (b), the second group of mechanisms includes a second bracket 1225, a second rotating shaft 1226, two second bending arms 1227 and a second driving mechanism 1228. The second rotating shaft 1226 is mounted on the second bracket 1225. Each group of second bending arms 1227 includes a fifth arm extending in the first direction and a sixth arm extending in the second direction, and both ends of the sixth arm are respectively connected to the fourth arm and the second rotating shaft 1226. The second rotating shaft 1226 is connected to the second driving mechanism 1228, and the second driving mechanism 1228 can drive the second rotating shaft 1226 to rotate so as to drive the second bending arm 1227 to rotate around the second rotating shaft 1226. Among them, the first bending arm 1223 and the second bending arm 1227 have the same rotation direction, and the rotation strokes do not overlap.

[0098] It is understandable that the first bracket 1221 and the second bracket 1225 can be a whole or two separate brackets, and the present application does not limit the structure of the bracket.

[0099] like Figure 8 (a) and Figure 8 As shown in (b) of FIG. 1 , the two groups of mechanisms are symmetrically arranged, wherein the first rotating shaft 1222 and the second rotating shaft 1226 are arranged along the third direction. Figure 8 The first bending arm 1223 and the second bending arm 1227 on the left side of (a) are symmetrically arranged. Figure 8 The first bending arm 1223 and the second bending arm 1227 on the right side of (a) are symmetrically arranged, so that the dual-axis foldable mobile phone can be bent by rotating the two bending arms simultaneously.

[0100] Combination Figure 4 (b) and Figure 8 As shown in (a) in the figure, the bending of the dual-axis foldable mobile phone 220 is explained by taking the first bending arm 1223 and the second bending arm 1227 on the same side as an example.

[0101] During the test, the second folding screen 222 of the dual-axis folding mobile phone 220 is fixed on the bracket, the first folding screen 221 is connected to the first bending arm 1223, the third folding screen 223 is connected to the second bending arm 1227, the first driving mechanism 1224 and the second driving mechanism 1228 are turned on, the first driving mechanism 1224 drives the first bending arm 1223 to rotate in a direction above the axis, and the second driving mechanism 1228 drives the second bending arm 1227 to rotate in a direction below the axis. The two bending arms have the same rotation direction and the rotation strokes do not overlap, thereby realizing the bending of the dual-axis folding mobile phone 220.

[0102] It is understandable that the rotation angle of the first bending arm 1223 and the second bending arm 1227 can be 0-180°, or can exceed 180°. In addition, the rotation directions of the first bending arm 1223 and the second bending arm 1227 are only exemplary. In some embodiments, the first bending arm 1223 rotates in a direction below the axis, and the second bending arm 1227 rotates in a direction above the axis, which is not limited in the present application.

[0103] According to the second bending mechanism 122 of the embodiment of the present application, the bending of the biaxial folding object to be tested can be realized, and the integration can be realized. The bending test can be realized by fixing the middle part. The overall size is small, and the drive shaft can be reused by a motor to simplify the structure. In addition, the speed and rotation angle of the motor can be adjusted to meet the test requirements.

[0104] refer to Fig. 9 and Fig.10 , Fig. 9 An exemplary structural diagram of the third bending mechanism 123 provided in an embodiment of the present application is shown. Fig.10 For passing Fig. 9The third bending mechanism 123 is used to bend the biaxial folding mobile phone 220. Figure 4 The double-axis folding mobile phone 220 shown in (b) of FIG. Fig. 9 As shown, the third bending mechanism 123 includes a second fixing plate 1231, an ejection mechanism 1232 and a pulling mechanism 1233 arranged on the bearing platform. The ejection mechanism 1232 is arranged between the second fixing plate 1231 and the pulling mechanism 1233. Fig. 9 and Fig.10 As shown, the second fixing plate 1231 fixes the first folding screen 221 of the dual-axis folding mobile phone 220, and the pulling and closing mechanism 1233 fixes the third screen. When the ejection mechanism 1232 lifts up the second folding screen 222, the second folding screen 222 rotates and bends relative to the first folding screen 221 around the first rotating joint 224, and the pulling and closing mechanism 1233 pulls the third folding screen 223 downward, so that the second folding screen 222 rotates relative to the third folding screen 223 around the second rotating joint 225, so as to achieve the following. Fig.10 The three screens are folded as shown.

[0105] It can be understood that the bending angle between each two screens mentioned above is 180°, which is described by taking full folding as an example. In some embodiments, the bending angle may be less than 180° or greater than 180°, and the present application does not limit this.

[0106] refer to Figure 9-11 , Fig.11 The present application embodiment is shown Fig. 9 A schematic diagram of the structure of the pulling and closing mechanism 1233 of the third bending mechanism 123 is provided. Fig. 9 and Fig.11 As shown, the pulling and closing mechanism 1233 includes a slide rail 1233a, a slide plate 1233b, an elastic arm 1233c and a third driving mechanism 1233d. Among them, the slide rail 1233a is set on the supporting platform 112, and the slide plate 1233b is slidably set on the slide rail 1233a. One end of the elastic arm 1233c is connected to the slide plate 1233b, and the third driving mechanism 1233d is connected to the slide plate 1233b. During the bending test, when the ejection mechanism 1232 pushes the second folding screen 222 to fold toward the first folding screen 221, the second folding screen 222 pulls the third folding screen 223 and pulls the elastic arm 1233c to move toward the first folding screen 221. At this time, the slide plate 1233b moves along the slide rail 1233a toward the first folding screen 211 until the three screens are folded together. When the mobile phone is moved from the folded state to the unfolded state, the third driving mechanism 1233d drives the slide plate 1233b to move away from the first folding screen 221, and the elastic arm 1233c pulls the third folding screen 223 to unfold the three screens. The above actions are repeated to achieve multiple bending of the dual-axis folding mobile phone 220.

[0107] In the third bending mechanism 123 of the embodiment of the present application, since the elastic arm 1233c has a certain elasticity and can bend to a certain arc, it can be equivalent to a multi-axis mechanism.

[0108] refer to Fig.12 , Fig.12 FIG. 1 shows a schematic diagram of N equivalent passive joints of the elastic arm 1233c of the embodiment of the present application. Fig.12 As shown in (a) of FIG. 1 , the elastic arm 1233c is bent and deformed, and the degree of its bending is equivalent to a multi-joint mechanism, such as Fig.12 As shown in (b) in FIG. 1 , the elastic arm after bending deformation can be equivalent to multiple joints, such as joint 1, joint 2 to joint n. Fig.12 As shown in (c), the elastic arm is equivalent to the rotation angle of each joint, that is, the final bending arc can be equivalently realized. The use of the elastic arm 1233c can reduce the setting of the multi-joint mechanism, which is not only simple in structure, but also can better achieve the bending of the object to be tested.

[0109] According to the third bending mechanism 123 of the embodiment of the present application, a multi-degree-of-freedom folding machine is bent by a driving shaft, which is simpler and more flexible. By designing the elastic arm 1233c, a passive multi-degree-of-freedom joint series is simulated, which can simulate a product that is manually pulled together at one time.

[0110] refer to Fig.13 and Fig.14 , Fig.13 An exemplary structural diagram of the fourth bending mechanism 124 provided in an embodiment of the present application is shown. Fig.14 The present application embodiment is shown Fig.13 The fourth bending mechanism 124 is provided as a schematic diagram of the structure of the connection with the dual-axis folding mobile phone. Figure 4 (b) shows the structure of the dual-axis folding mobile phone 220.

[0111] like Fig.13 As shown, the bending mechanism 4 includes a support frame 1241, a primary rotation pair 1242, a secondary rotation pair 1243 and a fourth driving mechanism 1244. Among them, the support frame 1241 is provided with a clamping portion 1245 for fixing the first part. The primary rotation pair 1242 is mounted on the support frame 1241, the secondary rotation pair 1243 is rotatably connected to the primary rotation pair 1242, and the fourth driving mechanism 1244 is connected to the primary rotation pair 1242.

[0112] like Fig.13 and Fig.14As shown, during the test, the first rotating joint 224 of the dual-axis folding mobile phone 220 is aligned with the rotating shaft of the primary rotating pair 1242, and the second rotating joint 225 is aligned with the rotating shaft of the secondary rotating pair 1243. The first folding screen 221 is fixed by the clamping part 1245, the second folding screen 222 is fixed to the primary rotating pair 1242, and the third folding screen 223 is fixed to the secondary rotating pair 1243. When the fourth driving mechanism 1244 is turned on, the primary rotating pair 1242 is driven to rotate, and the primary rotating pair 1242 drives the secondary rotating pair 1243 to rotate, thereby driving the second folding screen 222 to rotate around the first rotating joint 224 and around the second rotating joint 225, and the third screen rotates around the second rotating joint 225, so as to realize the folding of the three screens. When unfolding, the fourth driving mechanism 1244 drives the primary rotating pair and the secondary rotating pair in reverse to unfold the three screens, and then repeats the above actions to realize multiple bending of the dual-axis folding mobile phone 220.

[0113] According to the fourth bending mechanism 124 of the embodiment of the present application, an external multi-degree-of-freedom auxiliary structure is designed to realize the control of the movement of the bent product. A passive, non-driven S-shaped folding product with a linkage mechanism is controlled by an external multi-degree-of-freedom mechanism to realize the motion control of multiple motion axes.

[0114] In the above embodiment, the object to be tested is a multi-screen structure. In some embodiments, the object to be tested can also be a single-screen structure, and the entire screen is bent, such as a curled screen, and the corresponding bending mechanism is as follows: Fig.15 shown.

[0115] refer to Fig.15 , Fig.15 FIG. 1 shows an exemplary structural diagram of the fifth bending mechanism 125 provided in an embodiment of the present application. Fig.15 As shown, the fifth bending mechanism 125 includes a translation track 1251, a fixed shaft 1252, a rotation shaft 1253 and a driving member 1254. The translation track 1251 is fixed on the carrier, and the fixed shaft 1252 is fixed to one end of the translation track 1251. The rotation shaft 1253 is arranged on the translation track 1251, and the driving member 1254 is connected to the rotation shaft 1253 to drive the rotation shaft 1253 to slide along the translation track 1251.

[0116] During testing, the fixed shaft 1252 is fixedly connected to one end of the rolling screen, and the rotating shaft 1253 is connected to the other end of the rolling screen. After the driving member 1254 is turned on, the rotating shaft 1253 is driven to rotate so that the rotating shaft 1253 rolls up the rolling screen. During the rolling process, the rotating shaft 1253 can approach the fixed shaft 1252 under the action of the driving member 1254 to achieve the rolling of the rolling screen. When the rolling screen is unfolded, the rotating shaft 1253 can rotate in the opposite direction. At the same time, the driving member 1254 drives the rotating shaft 1253 to slide along the translation track 1251 in the direction away from the fixed shaft 1252. Thereafter, the above actions are repeated repeatedly to bend the rolling screen multiple times. The bending mechanism has a simple structure and can achieve the bending of the rolling screen.

[0117] According to the fifth bending mechanism 125 of the embodiment of the present application, the structure can simulate the bending behavior of human behavior and pull and close the curled screen at one time, which is in line with the user's usage behavior.

[0118] In some embodiments, considering the user's usage habits, when the mobile phone is opened or folded, the force applied by the hand to the screen is unbalanced, which will cause the screen to be subjected to not only the bending force of rotation around the axis, but also uneven force on both sides of the screen during the folding process. Therefore, the embodiments of the present application also provide a bending mechanism to simulate the situation where the user applies uneven force.

[0119] refer to Fig.16 , Fig.16 FIG. 1 shows an exemplary structural diagram of the sixth bending mechanism 126 provided in an embodiment of the present application. Fig.16 As shown, the sixth bending mechanism 126 includes a first bending assembly and a second bending assembly arranged on the left and right, the first bending assembly includes a third rotating shaft 1261, a third bending arm 1262 and a fifth driving mechanism 1263, the third rotating shaft 1261 can be fixed on the bearing platform by a bracket, and the third rotating shaft 1261 is respectively connected to the third bending arm 1262 and the fifth driving mechanism 1263. The second bending assembly includes a fourth rotating shaft 1264, a fourth bending arm 1265 and a sixth driving mechanism 1266, the fourth rotating shaft 1264 can be fixed on the bearing platform 112 by a bracket, and the fourth rotating shaft 1264 is respectively connected to the fourth driving arm and the sixth driving mechanism 1266.

[0120] During the test, Figure 4Taking the single-axis folding mobile phone 210 shown in (a) as an example, the first screen 211 is fixed on the bracket, and the second screen 212 is fixed by the third bending arm 1262 and the fourth bending arm 1265 respectively. In order to reflect the uneven force of the single-axis folding mobile phone 210, the rotation speeds of the fifth driving mechanism 1263 and the sixth driving mechanism 1266 can be asynchronous, thereby simulating the uneven force on the screen when the user rotates the screen using the mobile phone. Thereby, the accuracy of the test results is more accurately improved.

[0121] It can be understood that in some embodiments, in order to better simulate the stress conditions when a person operates a mobile phone with his hands, multiple driving mechanisms can be added. The position where each driving mechanism applies force to the screen can be set according to the position where the user presses the screen when folding the mobile phone. In the embodiments of the present application, the number of driving mechanisms is not limited.

[0122] In the above embodiment, when the mobile phone is bent, the speed at which the user folds the screen of the mobile phone can be combined. For example, when the user operates the single-axis folding mobile phone 210, when the angle between the two screens changes from 30° to 180°, the rotation time is 0.3 seconds. Based on the user's rotation speed, the bending speed and acceleration of the screen by the driving mechanism are controlled, so as to better imitate the user's behavior and improve the accuracy of detection.

[0123] In an embodiment of the present application, the sixth bending mechanism 126 may further include a fine-tuning force mechanism respectively connected to the fifth driving mechanism 1263 and the sixth driving mechanism 1266, for controlling the rotation speed, angle, acceleration, etc. of the respectively connected driving mechanisms.

[0124] refer to Fig.17 , Fig.17 The flow diagram of data transmission of the bending test device provided in the embodiment of the present application is shown. The bending test device 100 includes a PC monitoring station. Among them, the driving mechanism of the bending test device 100 can be a motor of the bending station, and the motor is connected to the PC monitoring station, and the PC monitoring station is used to control the angle, rotation speed, acceleration, etc. of the motor of the bending station. When fine-tuning is required, the PC monitoring station can fine-tune the rotation angle, speed, etc. of the motor through the fine-tuning force mechanism and the fine-tuning force sensor.

[0125] like Fig.17As shown, in some embodiments, the bending test device 100 may further include a fault detection module. For example, the fault detection module may be a part of the detection mechanism and is used to communicate with the object to be tested. When the object to be tested is an electronic device with a communication function, for example, a mobile phone, the mobile phone can communicate with the fault detection module, and the mobile phone itself can report the corresponding fault code after self-checking the bottom layer through the chip and display touch performance. The mobile phone sends the fault code to the fault detection module, which then reports it to the monitoring station. The self-check function of the object to be tested can be realized, combined with the fault detected by the detection mechanism from the appearance, and the fault of the mobile phone screen can be analyzed from multiple angles, thereby improving the reliability of the detection.

[0126] In some embodiments, a folding mechanism can also be designed for a screen that has multiple folds and whose area is halved after each fold. Fig.18 , 18 shows a schematic diagram of the structure of the multi-fold screen of the embodiment of the present application. Fig.18 As shown, the folding screen can be folded twice, and the area is halved each time it is folded. Based on the user's use behavior of folding, the bending mechanism may include a mechanical arm, and the mechanical arm is used to flip the screen so that the screen can be folded multiple times. In the embodiments of the present application, the structure of the mechanical arm can refer to the structure of the prior art, and the specific structure of the mechanical arm will not be described in the embodiments of the present application.

[0127] In summary, according to the bending test device 100 of the embodiment of the present application, the form of the product and the user's use behavior are taken into consideration. According to different user scenarios and environmental conditions of the failure mechanism, as well as sensor technologies such as vision and force perception, the changes of the object to be tested during the bending process can be quickly identified, the state during the bending process can be monitored, the accuracy of the bending test can be improved, and the reliability of the test results can be improved. In addition, the device has a high degree of integration and can meet the testing needs of various products.

[0128] The following describes the process (method) of the bending test of the embodiment of the present application in combination with the bending test device 100 described in the above embodiment.

[0129] like Figure 1 As shown, during the test, the environmental control device adjusts the test environment inside the cabin 111 according to the test requirements, for example, temperature, humidity, air pressure, light radiation and other conditions with failure excitation mechanism, so as to simulate the environment of different climates, different altitudes and different regions. The bending mechanism bends the object to be tested 200 according to the test requirements, wherein the specific structure and working principle of the bending mechanism can refer to the above embodiment. Figure 5-Figure 16 During the bending process, the detection mechanism can obtain an image of the object to be tested 200 after bending in real time, and detect the aging state of the object to be tested 200 after bending based on the image.

[0130] refer to Fig.19 , Fig.19 FIG. 1 is a flow chart showing the state analysis of the screen by the detection mechanism of the embodiment of the present application. Fig.19 As shown, the method includes S190-S193.

[0131] S190, marking the corner points of the image, and obtaining the coordinate position of each point in the coordinate system.

[0132] S191, find the region of interest (ROI) in the image based on the corner points. Outline the area to be processed from the processed image in the form of a box, circle, ellipse, irregular polygon, etc. based on the coordinates of the corner points. For example, the area with creases.

[0133] S192, invert the color of the region of interest and binarize the abnormal region.

[0134] After the image is grayed, it is binarized (adaptive) and the ROI area is corroded to remove noise and expanded to fill broken lines. The canny edge detection algorithm is used to show the contour. The findContours function is used to find the contour, limit the contour plasticity, and determine whether there is an abnormal contour. The abnormal contour is framed to obtain the abnormal area.

[0135] S193, judging the aging state of the object to be tested after being bent based on the abnormal area.

[0136] After determining the abnormal area, the aging state of the object to be tested can be further determined, for example, whether the aging is severe, mild, etc. The test method of the embodiment of the present application has reliable test results and high test efficiency.

[0137] It should be noted that the above-mentioned image processing process can refer to the image processing process in the prior art, and the embodiments of the present application will not be described in detail.

[0138] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0139] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0140] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0141] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A bending test device, used for performing a bending test on an object to be tested, characterized in that: include: A cabin body, wherein a cabin is formed inside the cabin body, and the bottom of the cabin body is a bearing platform; An environmental control device, used to at least regulate the air pressure, humidity, temperature, and light radiation inside the cabin so that the test environment inside the cabin simulates different climate environments; A bending mechanism, disposed on the carrying platform in the cabin, and used for bending the object to be tested; The detection mechanism is used to detect the aging state of the object to be tested after being bent.

2. The device according to claim 1, characterized in that The bending mechanism comprises: A bracket, arranged on the bearing platform; a rotating shaft extending in a first direction, wherein the rotating shaft is rotatably mounted on the bracket; A bending arm, comprising a first arm extending in the first direction and a second arm extending in the second direction, the first direction and the second direction form an angle, two ends of the second arm are respectively connected to the first arm and the rotating shaft, and the first arm is used to fix the object to be tested; The driving mechanism is connected to the rotating shaft and is used to drive the rotating shaft to rotate so that the bending arm drives a part of the object to be measured to bend in the direction where another part is located.

3. The device according to claim 2, characterized in that There are two bending arms, and the two bending arms are respectively arranged on both sides of the rotating shaft; The driving mechanism is provided with one, and the driving mechanism is connected to the rotating shaft located between the two bending arms through a conveyor belt.

4. The device according to claim 2, characterized in that The bending mechanism also includes: A first fixing plate for fixing the object to be tested, wherein the first fixing plate is arranged on the bracket and is arranged opposite to the bending arm.

5. The device according to claim 4, characterized in that The first arm is provided with a mounting component for fixing the object to be tested, and the mounting component includes: A base, one end of which is connected to the first arm, the base being provided with a U-shaped groove, the opening end of which faces the first fixing plate; A mounting plate for fixing the object to be measured, wherein a roller is provided at one end of the mounting plate, and the roller is arranged in the U-shaped groove and rolls in the U-shaped groove under the push or pull of the mounting plate; The axis of the roller is parallel to the axis of the rotating shaft.

6. The device according to claim 2, characterized in that The rotating shaft comprises: A first rotating shaft and a second rotating shaft arranged along a third direction, wherein the third direction is a direction perpendicular to the axis of the rotating shaft; First bending arms are respectively provided on both sides of the first rotating shaft, and the first bending arms are used to fix the first end of the object to be measured; Second bending arms are respectively provided on both sides of the second rotating shaft, and the second bending arms are used to fix the second end of the object to be measured; Each of the second bending arms corresponds to one of the first bending arms, and the first bending arm and the second bending arm have the same rotation direction and non-overlapping rotation strokes.

7. The device according to claim 6, characterized in that The driving mechanism comprises: A first driving mechanism, connected to the first rotating shaft, used to drive the first rotating shaft to drive the first bending arm to rotate; The second driving mechanism is connected to the second rotating shaft and is used for driving the second rotating shaft to drive the second bending arm to rotate.

8. The device according to claim 1, characterized in that The object to be tested comprises a first part, a second part and a third part, and a first rotation joint and a second rotation joint connecting the three parts; The bending mechanism comprises: a second fixing plate for fixing the first portion; an ejection mechanism, the ejection mechanism being disposed on the bearing platform and being used for lifting up the second part so that the second part moves relative to the first part around the first rotation joint and / or moves relative to the third part around the second rotation joint; A pulling and closing mechanism is used to fix the third part and apply force to the third part so that it moves relative to the second part around the second rotation joint.

9. The device according to claim 8, characterized in that The pulling and closing mechanism comprises: A slide plate, the slide plate being slidably disposed on the bearing platform; An elastic arm, one end of which is connected to the slide plate, and the other end of which is used to fix the third part of the object to be tested; The third driving mechanism is connected to the slide plate and is used to drive the slide plate to slide along the supporting platform.

10. The device according to claim 1, characterized in that The object to be tested comprises a first part, a second part and a third part, and a first rotation joint and a second rotation joint connecting the three parts; The bending mechanism comprises: A support frame, provided with a clamping portion for fixing the first portion; a primary rotation pair, mounted on the support frame and connected to the second portion, wherein the axis of the primary rotation pair is used to align with the axis of the first rotation joint; a secondary rotation pair, rotatably connected to the primary rotation pair and used to fix the third part, wherein the axis of the secondary rotation pair is used to align with the axis of the second rotation joint; The fourth driving mechanism is connected to the primary rotating pair and is used to drive the primary rotating pair to drive the secondary rotating pair to rotate.

11. The device according to claim 1, characterized in that The bending mechanism comprises: A translation track, wherein the translation track is fixed on the bearing platform; A fixed shaft, fixed to one end of the translation track, used to fix one end of the object to be measured; A rotation axis, arranged on the translation track, for self-rotation to roll up or pull apart the object to be tested; The driving member drives the rotating shaft to slide along the translation track so as to make the rotating shaft approach to or move away from the fixed shaft.

12. The device according to claim 1, characterized in that There are multiple bending mechanisms, and the multiple bending mechanisms are arranged in an array on the supporting platform.

13. The device according to claim 1, characterized in that The detection mechanism includes: A camera, the camera facing the bending mechanism, and used to obtain an image of the object to be tested after being bent; A processor connected to the camera, and configured to acquire the image and analyze the aging state of the object to be tested after bending based on the image; A monitoring station is connected to the processor and is used to display the result of the aging status.

14. A bending test method, characterized in that: Applied to the bending test device according to claims 1-13, the method comprises: The environmental control device adjusts the test environment inside the cabin according to the test requirements; The bending mechanism bends the object to be tested according to the test requirements; The detection mechanism obtains the image of the object to be detected after being bent, and detects the aging state of the object to be detected after being bent based on the image.

15. The method according to claim 14, characterized in that Detecting the aging state of the object to be tested after bending based on the image includes: Marking corner points of the image; Finding a region of interest in the image based on the corner points; Invert and binarize the region of interest to frame the abnormal region; The aging state of the object to be tested after being bent is determined based on the abnormal area.

Images