A detection system, an opening and closing clamp and a reverse arch detection method of a folding screen

Abstract

Embodiments of the present application provide a detection system, an opening and closing clamp, and a reverse arch detection method of a folding screen. The detection system is used to detect a folding screen of a folding electronic device, the folding electronic device being foldable along a folding axis, and the folding screen having an axis region corresponding to the position of the folding axis. The detection system comprises an opening and closing clamp and a profilometer. The opening and closing clamp comprises a base, a fixing assembly and a turnover mechanism arranged on the base. The fixing assembly is used to fix the folding electronic device on the turnover mechanism. The turnover mechanism has a rotating shaft and a bearing surface for bearing the folding electronic device, so that the turnover mechanism can drive the folding electronic device to fold or flatten along the folding axis, thereby adjusting the opening and closing angle of the folding electronic device. The profilometer is arranged towards the bearing surface of the turnover mechanism, and is used to obtain line profile data of the axis region of the folding screen, thereby dynamically detecting the state of the folding screen during folding or flattening of the folding electronic device.

Description

Technical Field

[0001] This application relates to the field of testing technology, and in particular to a testing system, an opening and closing fixture, and a method for detecting the anti-arching of a folding screen. Background Technology

[0002] With the rapid development of electronic technology, foldable electronic devices are becoming increasingly popular among consumers. Foldable electronic devices can fold along their folding axis. During the folding process, the axis area of ​​the folding screen of the foldable electronic device may arch, resulting in a reverse arching problem. When restoring the device, this reverse arching may cause abnormal noises, affecting the user experience.

[0003] Currently, the approach to this problem is mainly observational, making it impossible to pinpoint and quantify the camber issue in foldable screens. The camber disappears when the foldable electronic device is in a suspended state. Therefore, how to dynamically detect the state of the foldable screen during the folding or unfolding process of foldable electronic devices is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a detection system, an opening and closing fixture, and a method for detecting the anti-camber of a foldable screen, so as to achieve dynamic detection of the foldable screen state during the folding or unfolding process of a foldable electronic device. The specific technical solution is as follows:

[0005] An embodiment of the first aspect of this application provides a detection system for detecting the folding screen of a foldable electronic device, the foldable electronic device being foldable along its folding axis, the folding screen having an axis region corresponding to the position of the folding axis; the detection system includes an opening and closing fixture and a profiler; the opening and closing fixture includes a base, and a fixing component and a flipping mechanism disposed on the base; the fixing component is used to fix the foldable electronic device to the flipping mechanism; the flipping mechanism has a rotation axis and a bearing surface for supporting the foldable electronic device, so that the flipping mechanism can drive the foldable electronic device to fold or flatten along the folding axis to adjust the opening and closing angle of the foldable electronic device; the profiler is disposed facing the bearing surface of the flipping mechanism for acquiring line profile data of the axis region of the folding screen.

[0006] As can be seen from the above, the detection system of this application embodiment is used to detect the folding screen of a foldable electronic device. The foldable electronic device can be folded along its folding axis, and the folding screen has an axis region corresponding to the position of the folding axis. The detection system includes an opening and closing fixture and a profiler. The opening and closing fixture includes a base, and a fixing component and a flipping mechanism disposed on the base. During the detection process, the foldable electronic device is placed on the bearing surface of the flipping mechanism, and the folding screen is oriented in a direction away from the bearing surface, so that the profiler can obtain the line profile data of the axis region of the folding screen. The folding axis of the foldable electronic device is parallel to the rotation axis of the flipping mechanism, and in a direction perpendicular to the bearing surface. The folding electronic device is fixed to the flipping mechanism by a fixing component; this ensures that the folding electronic device will not shift during the flipping mechanism's folding or flattening along the folding axis, thereby adjusting the opening and closing angle of the folding electronic device. This allows for dynamic detection of the folding screen's state during the folding or flattening process, enabling real-time measurement and data acquisition of the folding screen's surface contour. In this embodiment, the opening and closing fixture is a dynamic bending fixture, which, in conjunction with a contour measuring instrument, measures the contour of the axis area to identify anti-arching issues. Furthermore, the contour data can be analyzed through post-processing to objectively identify and quantify the degree of anti-arching.

[0007] In some embodiments of this application, the bearing surface includes: a first bearing portion and a second bearing portion;

[0008] The flipping mechanism includes: a first rotating part and a second rotating part; the first rotating part includes a first bearing part; the second rotating part includes a second bearing part; the rotation axes of the first rotating part and the second rotating part coincide to form the rotation axis of the flipping mechanism; the first rotating part and the second rotating part are used to drive the foldable electronic device to fold or flatten along the folding axis.

[0009] As can be seen from the above, the first rotating part is used to drive the first machine body to rotate, and the second rotating part is used to drive the second machine body to rotate; the rotation axes of the first rotating part and the second rotating part coincide to form the rotation axis of the flipping mechanism to ensure the uniqueness of the rotation center, thereby ensuring rotation accuracy.

[0010] In some embodiments of this application, the flipping mechanism further includes: a first driving structure;

[0011] The first driving structure is used to drive the first rotating part or the second rotating part to rotate around the rotating axis.

[0012] As can be seen from the above, the first driving structure provides power to the first rotating part or the second rotating part, thereby enabling the flipping mechanism to drive the foldable electronic device to fold or flatten.

[0013] In some embodiments of this application, the first driving structure includes: a first motor and a transmission structure;

[0014] One end of the transmission structure is connected to the first motor, and the other end is connected to the first rotating part or the second rotating part.

[0015] As can be seen from the above, during the testing process, the first rotating part can be driven by the first driving structure to drive the first body to rotate, or the second rotating part can be driven by the first driving structure to drive the second body to rotate, or the first rotating part can be driven to drive the first body to rotate and the second rotating part can drive the second body to rotate at the same time. This can achieve single-sided opening and closing or double-sided opening and closing, and can realize the folding or flattening of foldable electronic devices.

[0016] In some embodiments of this application, the transmission structure includes: a first transmission wheel, a second transmission wheel, a belt, a connecting shaft, and a bearing;

[0017] The first transmission wheel is connected to the output shaft of the first motor and is connected to the second transmission wheel via the belt, so that the first transmission wheel and the second transmission wheel can rotate synchronously.

[0018] The second transmission wheel is connected to the first end of the connecting shaft;

[0019] The second end of the connecting shaft is connected to the first rotating part or the second rotating part;

[0020] The connecting shaft is rotatably connected to the base via the bearing.

[0021] As can be seen from the above, the rotation of the output shaft of the first motor drives the rotation of the first rotating part. The first transmission wheel and the second transmission wheel are connected by a belt to achieve synchronous rotation. The second transmission wheel is connected to the first end of the connecting shaft, and the second end of the connecting shaft is connected to the first rotating part or the second rotating part, thereby realizing the drive of the first rotating part or the second rotating part by the first motor. The connecting shaft is rotatably connected to the base through a bearing to realize the installation between the flipping mechanism and the base.

[0022] In some embodiments of this application, the first rotating part is provided with a first connecting ring on each side of the extending direction of the rotating shaft;

[0023] The second rotating part is provided with a second connecting ring on each side of the extending direction of the rotating shaft;

[0024] The number of the first driving structures is two;

[0025] Each of the connecting shafts passes through an adjacent first connecting ring and a second connecting ring; one connecting shaft is fixedly connected to the first connecting ring and rotatably connected to the second connecting ring; the other connecting shaft is fixedly connected to the second connecting ring and rotatably connected to the first connecting ring.

[0026] As can be seen from the above, each connecting shaft passes through an adjacent first connecting ring and a second connecting ring, serving as a quasi-axis. This ensures that the rotation centers of the first rotating part and the second rotating part are coaxial, thereby guaranteeing the motion accuracy of the flipping mechanism and improving detection accuracy. One connecting shaft is fixedly connected to the first connecting ring and rotatably connected to the second connecting ring, while the other connecting shaft is fixedly connected to the second connecting ring and rotatably connected to the first connecting ring. This ensures that the first rotating part and the second rotating part do not interfere with each other during rotation, further improving detection accuracy.

[0027] In some embodiments of this application, the fixing component includes:

[0028] A horizontal fixing component is used to restrict the movement of the foldable electronic device in a first direction and a second direction;

[0029] A vertical fixing component is used to restrict the movement of the foldable electronic device in the third direction;

[0030] The first direction is the extension direction of the rotation axis, and the third direction is the direction perpendicular to the bearing surface. The first direction, the second direction, and the third direction are perpendicular to each other.

[0031] As can be seen from the above, by using horizontal and vertical fixing components to restrict the movement of foldable electronic devices in different directions, the fixing effect is more reliable.

[0032] In some embodiments of this application, the horizontal fixing component includes at least two positioning and clamping mechanisms;

[0033] The positioning and clamping mechanism is fixedly connected to the flipping mechanism;

[0034] The at least two positioning and clamping mechanisms are respectively disposed on both sides of the flipping mechanism in the second direction, for limiting the movement of the foldable electronic device in the first direction and / or the second direction.

[0035] As can be seen from the above, the two positioning and clamping mechanisms can be used to fix the first body and the second body respectively, ensuring the reliability of the fixation.

[0036] In some embodiments of this application, the positioning and clamping mechanism includes:

[0037] Clamping blocks are used to abut against the foldable electronic device;

[0038] A second drive structure is used to drive the clamping block to move along the second direction so that the at least two positioning clamping mechanisms clamp or release the foldable electronic device.

[0039] As can be seen from the above, the two clamping blocks can push the foldable electronic device from opposite directions, thereby clamping the foldable electronic device and restricting its movement. The second drive structure provides power to the clamping blocks. Furthermore, the clamping blocks are designed to directly push the foldable electronic device to achieve clamping. The clamping method is simple and can be applied to foldable electronic devices of different sizes, making the detection system more versatile.

[0040] In some embodiments of this application, the second driving structure includes:

[0041] A sliding element is fixedly connected to the clamping block;

[0042] A cylinder, wherein the cylinder housing is slidably connected to the sliding member, and the cylinder piston rod is fixedly connected to the sliding member to drive the sliding member to move along the second direction.

[0043] As can be seen from the above, the cylinder-driven method has high motion accuracy, high stability, and is easy to control; the sliding component is used to realize the transmission between the cylinder and the clamping block, which is simple in connection and has higher transmission accuracy.

[0044] In some embodiments of this application, the horizontal fixing component further includes at least two limiting members;

[0045] The at least two limiting members are disposed on the bearing surface of the flipping mechanism and are spaced apart in the first direction to restrict the movement of the foldable electronic device in the first direction.

[0046] As can be seen from the above, the limiting component plays the role of limiting and positioning. In the process of fixing the foldable electronic device, the limiting component can be used to position the foldable electronic device first to ensure that the position is accurate before the positioning clamping mechanism is used to clamp the foldable electronic device.

[0047] In some embodiments of this application, the vertical fixing component includes:

[0048] The connecting arm is connected to the flipping mechanism;

[0049] The pressing component, connected to the connecting arm, is disposed on the bearing surface side of the flipping mechanism and can move towards or away from the bearing surface in a third-party upward direction.

[0050] As can be seen from the above, by moving the pressing component in a third direction, the foldable electronic device is pressed onto the bearing surface of the flipping mechanism, and this vertical fixing component can be applied to foldable electronic devices of different sizes, making it more versatile.

[0051] In some embodiments of this application, the pressing element includes:

[0052] Rollers are used to press the foldable electronic device together;

[0053] The connector has a first end connected to the roller and a second end connected to the connecting arm.

[0054] As can be seen from the above, the outer surface of the roller is curved, making it less likely to damage the foldable screen.

[0055] In some embodiments of this application, the second end of the connector is connected to the connecting arm via a connecting post and a spring;

[0056] One end of the connecting column is fixedly connected to the connecting arm, and the other end is a free end;

[0057] The second end of the connector is slidably connected to the connecting post;

[0058] The spring is sleeved on the outside of the connecting post and abuts against the free end of the connecting post and the second end of the connector, respectively.

[0059] As can be seen from the above, this design allows the clamping action of the pressing component to be achieved through the elastic force of the spring, and when it is necessary to release the fixation, the pressing component can be lifted directly and the spring can be compressed, which facilitates the assembly and disassembly of foldable electronic devices.

[0060] In some embodiments of this application, the vertical fixing assembly further includes: a guide member;

[0061] The guide member is parallel to and spaced apart from the connecting column;

[0062] One end of the guide is fixedly connected to the connecting arm, and the other end is a free end; the guide is slidably connected to the connecting member.

[0063] As can be seen from the above, with this configuration, the guide component has a guiding function, ensuring that the pressing component will not deviate during the upward movement of the third party.

[0064] In some embodiments of this application, the vertical fixing component further includes: a third driving structure;

[0065] The third driving structure is used to drive the connecting arm, causing the pressing component to move along the second direction.

[0066] As can be seen from the above, the third drive structure drives the vertical fixing component to move in the second direction to accommodate foldable electronic devices of different sizes.

[0067] In some embodiments of this application, the detection system further includes: a displacement stage;

[0068] The opening and closing clamp is mounted on the displacement stage;

[0069] The displacement stage is used to drive the opening and closing fixture to move, so as to adjust the relative positional relationship between the profiler and the opening and closing fixture.

[0070] As can be seen from the above, by setting a displacement stage, the relative positional relationship between the profilometer and the fixture can be adjusted, enabling the profilometer to collect line profile data at different positions of the foldable electronic device.

[0071] In some embodiments of this application, the displacement stage includes a vertical adjustment mechanism; the vertical adjustment mechanism includes: a support base, a second motor, and a lead screw assembly;

[0072] The output shaft of the second motor is connected to the lead screw assembly, the lead screw assembly is connected to the opening and closing clamp, and the opening and closing clamp is slidably connected to the support base, so that the second motor can drive the opening and closing clamp to slide in a direction perpendicular to the bearing surface through the lead screw assembly.

[0073] As can be seen from the above, the lead screw assembly has high transmission accuracy and strong stability, and can convert the rotation of the second motor into linear motion.

[0074] In some embodiments of this application, the support base includes: a side plate and a guide rail;

[0075] The lead screw assembly is fixedly connected to the side plate;

[0076] The guide rail is fixedly connected to the side plate, extends in a direction perpendicular to the bearing surface, and is slidably connected to the opening and closing clamp.

[0077] As can be seen from the above, the guide rail plays a role in fixing and guiding, enabling the opening and closing clamp to move more smoothly in the third direction.

[0078] In some embodiments of this application, the displacement stage further includes a horizontal adjustment mechanism; the horizontal adjustment mechanism includes: a first slide rail and a second slide rail;

[0079] The vertical adjustment mechanism is fixedly connected to the first slide rail;

[0080] The first slide rail is arranged along a first direction, and the second slide rail is arranged along a second direction; the first slide rail and the second slide rail are slidably connected; or, the first slide rail is arranged along a second direction, and the second slide rail is arranged along a first direction; the first slide rail and the second slide rail are slidably connected.

[0081] The first direction is the extension direction of the rotating shaft, and the second direction is perpendicular to the first direction and parallel to the bearing surface.

[0082] As can be seen from the above, the use of slide rails results in smoother movement; the first and second slide rails control the movement in the first and second directions respectively, ensuring that the two movement directions do not interfere with each other, and thus achieving higher movement accuracy.

[0083] In some embodiments of this application, the detection system further includes: a processor;

[0084] The processor is used to process the line contour data obtained by the profilometer, and determine whether the folding screen of the foldable electronic device is arched based on the processing result.

[0085] As can be seen from the above, by processing the line contour data obtained by the profilometer, the processing result is compared with the preset distance threshold to determine whether the folding screen is cambered. When the height difference is greater than the preset distance threshold, the folding screen can be determined to be cambered, which solves the problem of being unable to locate and quantify the camber problem of folding screens in related technologies.

[0086] In some embodiments of this application, the detection system further includes: a mounting bracket;

[0087] The mounting bracket is used to mount the profilometer.

[0088] As can be seen from the above, the mounting bracket can ensure the position of the profilometer.

[0089] An embodiment of the second aspect of this application provides an opening and closing clamp, characterized in that it is used to clamp a foldable electronic device; the opening and closing clamp includes a base, and a fixing component and a flipping mechanism disposed on the base; the fixing component is used to fix the foldable electronic device to the flipping mechanism; the flipping mechanism has a rotating shaft and a bearing surface for supporting the foldable electronic device, so that the flipping mechanism can drive the foldable electronic device to fold or flatten along the folding shaft to adjust the opening and closing angle of the foldable electronic device.

[0090] As can be seen from the above, the opening and closing clamp of this application embodiment can fix the foldable electronic device to the flipping mechanism through the fixing component, ensuring that the foldable electronic device will not shift during the process of the flipping mechanism driving the foldable electronic device to fold or flatten along the folding axis, so as to adjust the opening and closing angle of the foldable electronic device, thereby realizing the dynamic folding of the foldable electronic device, so as to realize the real-time measurement and data acquisition of the surface contour of the foldable screen.

[0091] An embodiment of the third aspect of this application proposes a method for detecting the anti-arching of a foldable screen, the method comprising:

[0092] Obtain line contour data of the preset folding position of the foldable screen at different folding angles; wherein, the line contour data is obtained by detection through the detection system of any embodiment of the first aspect; the line contour data is the correspondence between the folding angle, the screen detection position and the height of the foldable screen;

[0093] The target screen detection position of the highest point of the folding screen is determined from the line contour data, and the first correspondence between the folding angle and the height of the folding screen at the target screen detection position is obtained.

[0094] Based on the first correspondence, the highest point of the anti-arch and the lowest point after the anti-arch is restored are determined; wherein, the highest point of the anti-arch is the peak point of the folded screen height under the target screen detection position, and the lowest point after the anti-arch is the trough point of the folded screen height under the target screen detection position;

[0095] Determine a second correspondence between the screen detection position and the height of the folded screen at the folding angle of the highest point of the anti-arch, and determine a third correspondence between the screen detection position and the height of the folded screen at the folding angle of the lowest point after the anti-arch is restored;

[0096] Calculate the height difference of the folded screen at each of the same screen detection positions in the third correspondence relationship and the second correspondence relationship;

[0097] If there is a height difference greater than a preset distance threshold, the folding screen is determined to be arched.

[0098] As can be seen from the above, the folding screen anti-arching detection method of this application embodiment processes the line contour data of the preset folding position of the folding screen under different folding angles, determines the target screen detection position of the highest point of the folding screen in the line contour data, and obtains the first correspondence between the folding angle and the height of the folding screen at the target screen detection position. Based on the first correspondence, the highest point of anti-arching and the lowest point after anti-arching recovery are determined, thereby determining the second correspondence between the screen detection position and the height of the folding screen at the folding angle of the highest point of anti-arching, and determining the third correspondence between the screen detection position and the height of the folding screen at the folding angle of the lowest point after anti-arching recovery. By calculating the height difference of the folding screen height at each of the same screen detection positions in the third correspondence and the second correspondence, and comparing it with a preset distance threshold, it is determined whether the folding screen is anti-arched. When the height difference is greater than the preset distance threshold, it can be determined that the folding screen is anti-arched, which solves the problem in related technologies that it is impossible to locate and quantify the anti-arching problem of folding screens.

[0099] In some embodiments of this application, determining the target screen detection position of the highest point of the foldable screen in the line contour data and obtaining a first correspondence between the folding angle and the height of the foldable screen at the target screen detection position includes:

[0100] A three-dimensional contour map is generated based on the line contour data; wherein, the three coordinate axes of the three-dimensional contour map represent the folding angle, the screen detection position, and the folding screen height, respectively.

[0101] The highest point of the foldable screen is obtained from the point with the highest height in the 3D contour map, and the target screen detection position corresponding to the highest point of the foldable screen is obtained.

[0102] The curve of folding angle and folding screen height at the target screen detection position is extracted from the three-dimensional contour map to obtain the first curve, wherein the first correspondence is the first curve.

[0103] As can be seen from the above, by generating a 3D contour map from the line contour data, the contour of the foldable screen can be shown more clearly, making it easier to accurately identify the highest point of the foldable screen; by generating the first curve, the first correspondence between the folding angle and the height of the foldable screen at the target screen detection position can be reflected more intuitively.

[0104] In some embodiments of this application, determining the highest point of the anti-arch and the lowest point after the anti-arch is restored based on the first correspondence includes:

[0105] Calculate the gradient curve of the first curve to obtain the second curve;

[0106] In the second curve, the point where the gradient is zero is determined, and the point corresponding to the point where the gradient is zero is determined in the first curve to obtain the highest point of the anti-arch and the lowest point after the anti-arch is restored.

[0107] As can be seen from the above, by obtaining the second curve, the trend of gradient change can be observed intuitively, thereby quickly determining the location of the highest point of the anti-arch and the lowest point after the anti-arch is restored.

[0108] In some embodiments of this application, determining the second correspondence between the screen detection position and the folded screen height at the folding angle of the highest point of the anti-arch and determining the third correspondence between the screen detection position and the folded screen height at the folding angle of the lowest point after the anti-arch is restored includes:

[0109] Determine the highest point of the anti-arch and the lowest point after the anti-arch is restored, and the folding angles of the corresponding points in the first curve to obtain the first folding angle and the second folding angle.

[0110] Curves of the screen detection position and the height of the folded screen at the first folding angle and the second folding angle are generated respectively to obtain a third curve and a fourth curve, wherein the second correspondence is the third curve and the third correspondence is the fourth curve;

[0111] The calculation of the height difference of the folded screen at each of the same screen detection positions in the third correspondence relationship and the second correspondence relationship; determining the folded screen to be cambered when there is a height difference greater than a preset distance threshold includes:

[0112] The difference curve between the third curve and the fourth curve is calculated to obtain the fifth curve; if there is a point in the fifth curve that is higher than a preset distance threshold, the folding screen is determined to be arched.

[0113] As can be seen from the above, the third and fourth curves can intuitively show the relationship between the screen height corresponding to the highest point of the anti-arch and the lowest point after the anti-arch is restored at different screen detection positions.

[0114] In some embodiments of this application, the preset folding position is one-quarter, one-half, and three-quarters of the length of the axial region of the folding screen; the folding angle ranges from 0° to 20°.

[0115] As can be seen from the above, the arching problem of foldable screens is usually triggered when the opening angle is about 170°. The opening angle of 170° corresponds to a folding angle of 10°. Detection within the range of folding angle of 0°-20° can cover the opening angle at which the arching problem of foldable screens is triggered, and the range is reasonable, which is conducive to improving production efficiency. Attached Figure Description

[0116] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0117] Figure 1 This is a schematic diagram of the structure of a foldable electronic device according to an embodiment of this application (flattened state);

[0118] Figure 2 This is a schematic diagram of the structure of a foldable electronic device according to an embodiment of this application (folded state);

[0119] Figure 3 This is a schematic diagram of the detection system (equipped with a foldable electronic device) according to an embodiment of this application;

[0120] Figure 4 This is a diagram showing the connection relationship between the opening and closing clamp and the foldable electronic device in the embodiments of this application;

[0121] Figure 5 This is a first-view structural schematic diagram of the opening and closing clamp in the embodiments of this application;

[0122] Figure 6 for Figure 5 A schematic diagram of the decomposed structure;

[0123] Figure 7 for Figure 4 Top view;

[0124] Figure 8 This is a schematic diagram of the first driving structure from a first-view perspective in an embodiment of this application;

[0125] Figure 9 This is a schematic diagram of the first driving structure from a second perspective in an embodiment of this application;

[0126] Figure 10 for Figure 8 A schematic diagram of the decomposed structure;

[0127] Figure 11 This is a structural schematic diagram of the opening and closing clamp from a second perspective in an embodiment of this application;

[0128] Figure 12 for Figure 11 Top view;

[0129] Figure 13 This is a first-view structural schematic diagram of the first positioning and clamping mechanism in the embodiments of this application;

[0130] Figure 14 This is a structural schematic diagram of the first positioning and clamping mechanism in the embodiments of this application from a second perspective.

[0131] Figure 15 for Figure 13 A schematic diagram of the decomposed structure;

[0132] Figure 16 for Figure 13 A schematic diagram of the decomposed structure from another perspective;

[0133] Figure 17 This is a schematic diagram of the structure of the second positioning and clamping mechanism in the embodiments of this application;

[0134] Figure 18 This is a structural schematic diagram of the vertical fixing component from a first-view perspective in an embodiment of this application;

[0135] Figure 19 This is a structural schematic diagram of the vertical fixing component from a second perspective in an embodiment of this application;

[0136] Figure 20 for Figure 5 Side view;

[0137] Figure 21 This is a schematic diagram of the displacement stage in an embodiment of this application;

[0138] Figure 22 for Figure 21 A schematic diagram of the decomposed structure;

[0139] Figure 23 This is a schematic diagram of the vertical adjustment mechanism in the embodiments of this application;

[0140] Figure 24 for Figure 23 A schematic diagram of the decomposed structure;

[0141] Figure 25 This is a schematic diagram of the horizontal adjustment mechanism in an embodiment of this application;

[0142] Figure 26 This is a flowchart of the anti-arching detection method for a foldable screen according to an embodiment of this application;

[0143] Figure 27 This is a schematic diagram of the preset folding position in the embodiments of this application;

[0144] Figure 28 This is a line contour curve of the preset folding position (reverse arch folding screen) when the folding angle is 20° in the embodiments of this application;

[0145] Figure 29This is a line contour curve (reverse arch folding screen) of the preset folding position when the folding angle is 10° in the embodiments of this application;

[0146] Figure 30 This is a line contour curve (reverse arch folding screen) of the preset folding position when the folding angle is 0° in the embodiments of this application;

[0147] Figure 31 This is a three-dimensional contour diagram in the embodiments of this application;

[0148] Figure 32 This is the first graph in the embodiments of this application;

[0149] Figure 33 This is the second graph in the embodiments of this application;

[0150] Figure 34 These are the third and fourth curves in the embodiments of this application;

[0151] Figure 35 This is the fifth graph in the embodiments of this application;

[0152] Figure 36 This is a line contour curve of the preset folding position when the folding angle is 20° in the embodiments of this application (normal folding screen);

[0153] Figure 37 This is a line contour curve of the preset folding position when the folding angle is 10° in the embodiments of this application (normal folding screen);

[0154] Figure 38 This is a line contour curve of the preset folding position when the folding angle is 0° in the embodiments of this application (normal folding screen).

[0155] Explanation of reference numerals in the attached figures:

[0156] Foldable electronic device 1; First body 11; Second body 12; Foldable screen 13; Middle frame 14; Axis area S1; Non-axis area S2; Folding axis N; Rotation mechanism 15;

[0157] Opening and closing clamp 10; base 100; first mounting plate 110; second mounting plate 120; support column 130; third mounting plate 140; fixing assembly 200; horizontal fixing assembly 210; positioning and clamping mechanism 211; clamping block 2111; first clamping block 21111; second clamping block 21112; second drive structure 2112; sliding member 21121; cylinder 21122; cylinder housing 21123; cylinder piston rod 21124; protruding structure 21125; sliding groove structure 21126; bolt 21127; first nut 21128; connecting notch 21129; limiting member 212; vertical fixing assembly 220; connecting arm 2 21; Pressing component 222; Roller 2221; Connector 2222; Connecting column 223; Spring 224; Guide component 225; Third drive structure 226; Tilting mechanism 300; Rotating shaft M; Bearing surface 301; First bearing part 301a; Second bearing part 301b; Mounting hole 3011; First rotating part 310; First connecting ring 311; Second rotating part 320; Second connecting ring 321; First drive structure 330; First motor 331; Output shaft of the first motor 3311; Transmission structure 332; First transmission wheel 3321; Second transmission wheel 3322; Belt 3323; Connecting shaft 3324; Bearing 3325;

[0158] 20 profilometer; 30 mounting bracket;

[0159] Displacement stage 40; vertical adjustment mechanism 41; support base 411; base plate 4111; side plate 4112; guide rail 4113; first support plate 4114; second motor 412; output shaft of the second motor 4121; lead screw assembly 413; screw 4131; second nut 4132; fastener 4133; coupling 4134; second support plate 414; first connecting plate 415; second connecting plate 416; slider 417; wire storage box 418; horizontal adjustment mechanism 42; first slide rail 421; first slide groove 4211; second slide rail 422; second slide groove 4221; first sliding connector 423; second sliding connector 424; third connecting plate 425; bearing base 43. Detailed Implementation

[0160] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0161] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, "first mounting plate" and "second mounting plate" are used to distinguish different mounting plates and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or position, and the terms "first" and "second" do not necessarily imply that they are different.

[0162] It should be noted that, in this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0163] With the rapid development of electronic technology, foldable electronic devices are becoming increasingly popular among consumers. Foldable electronic devices can fold along their folding axis. During folding, the axis area of ​​the folding screen may arch, resulting in a reverse arching problem. Upon retraction, this arching may produce abnormal noises, such as the screen hitting the steel plate or hinge panel, affecting the user experience. Currently, this problem is mainly addressed through observation, making it impossible to pinpoint and quantify the reverse arching issue. The reverse arching disappears when the foldable electronic device is in a suspended state. Therefore, how to dynamically detect the state of the folding screen during the folding or unfolding process of foldable electronic devices is a problem that urgently needs to be solved by those skilled in the art. To solve the above technical problems, embodiments of this application provide a detection system, an opening and closing fixture, and a method for detecting the reverse arching of a folding screen.

[0164] Foldable electronic devices can be mobile phones, tablets, wearable devices, in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), and other foldable mobile terminal products. This application does not limit the specific type of foldable electronic device.

[0165] For ease of explanation, the following embodiments use a foldable electronic device, such as a mobile phone, to illustrate the structure of the foldable electronic device and the structure of the detection system for detecting it.

[0166] like Figure 1 and Figure 2As shown, Figure 1 This is a schematic diagram of the structure of the foldable electronic device 1 according to an embodiment of this application (in a flattened state). Figure 2 This is a schematic diagram of the structure of the foldable electronic device 1 according to an embodiment of this application (folded state). The foldable electronic device 1 includes a pivot mechanism 15, a first body 11 and a second body 12. Both the first body 11 and the second body 12 include a middle frame 14. The middle frames 14 of the first body 11 and the second body 12 are respectively connected to the two sides of the pivot mechanism 15. The pivot mechanism 15 drives the first body 11 and the second body 12 to rotate, so that the first body 11 and the second body 12 can be folded and flattened along the folding axis N. The extension direction of the folding axis N is consistent with the extension direction of the pivot mechanism 15.

[0167] The foldable electronic device 1 also includes a foldable screen 13, which includes an axis area S1 and two non-axis areas S2. The two non-axis areas S2 are located on both sides of the axis area S1. The part of the foldable screen 13 corresponding to the axis area S1 covers the pivot mechanism 15. The parts of the foldable screen 13 corresponding to the two non-axis areas S2 belong to the first body 11 and the second body 12, respectively. The parts of the foldable screen 13 corresponding to the non-axis areas S2 can be connected to the middle frame 14 and can be folded or unfolded under the drive of the middle frame 14.

[0168] The foldable screen 13 can be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MOLED) display, a quantum dot light-emitting diode (QLED) display, or a liquid crystal display (LCD), etc. The display screen 13 can also have touch functionality, meaning it can be a touchscreen.

[0169] The structure of the detection system according to the embodiments of this application will be described in detail below.

[0170] like Figures 3 to 6 As shown, Figure 3 This is a schematic diagram of the detection system according to an embodiment of this application (equipped with a foldable electronic device 1). Figure 4 This is a diagram showing the connection relationship between the opening and closing clamp 10 and the foldable electronic device 1 in the embodiments of this application. Figure 5 This is a first-view structural schematic diagram of the opening and closing clamp 10 in the embodiments of this application. Figure 6 for Figure 5 The exploded structural diagram is shown below. For ease of description, we can define a first direction, a second direction, and a third direction that are perpendicular to each other. The first direction is the extension direction of the rotation axis M, and the third direction is the direction perpendicular to the bearing surface 301. An embodiment of the first aspect of this application proposes a detection system for detecting the folding screen 13 of a foldable electronic device 1. The foldable electronic device 1 can be folded along its folding axis N, and the folding screen 13 has an axis region S1 corresponding to the position of the folding axis N. The detection system includes an opening and closing clamp 10 and a profilometer 20. Specifically, the opening and closing clamp 10 includes a base 100, and a fixing component 200 and a flipping mechanism 300 disposed on the base 100; the fixing component 200 is used to fix the foldable electronic device 1 to the flipping mechanism 300; the flipping mechanism 300 has a rotation axis M and a bearing surface 301 for bearing the foldable electronic device 1, so that the flipping mechanism 300 can drive the foldable electronic device 1 to fold or flatten along the folding axis N, so as to adjust the opening and closing angle of the foldable electronic device 1; the profiler 20 is disposed toward the bearing surface 301 of the flipping mechanism 300, and is used to acquire the line profile data of the axis region S1 of the foldable screen 13.

[0171] The detection system of this application embodiment is used to detect the folding screen 13 of a foldable electronic device 1. The foldable electronic device 1 can be folded along its folding axis N, and the folding screen 13 has an axis region S1 corresponding to the position of the folding axis N. The detection system includes an opening and closing fixture 10 and a profiler 20. The opening and closing fixture 10 includes a base 100, a fixing component 200 disposed on the base 100, and a flipping mechanism 300. During the detection process, the foldable electronic device 1 is placed on the bearing surface 301 of the flipping mechanism 300, so that the folding screen 13 is oriented away from the bearing surface 301, so that the profiler 20 can obtain the line profile data of the axis region S1 of the folding screen 13. Figure 7 As shown, Figure 7 for Figure 4In the top view, the folding axis N of the foldable electronic device 1 is parallel to the rotation axis M of the flipping mechanism 300 and coincides in the direction perpendicular to the bearing surface 301. The foldable electronic device 1 is fixed to the flipping mechanism 300 by the fixing component 200. This ensures that the foldable electronic device 1 will not shift during the process of the flipping mechanism 300 folding or flattening along the folding axis N, thereby adjusting the opening and closing angle of the foldable electronic device 1. This allows for dynamic detection of the state of the foldable screen 13 during the folding or flattening process of the foldable electronic device 1, enabling real-time measurement and data acquisition of the surface contour of the foldable screen 13. In this embodiment, the opening and closing fixture 10 is a dynamic bending fixture. In conjunction with the contour measuring instrument 20, the contour of the axis area S1 is measured to identify the anti-arching problem. Furthermore, the degree of anti-arching can be objectively identified and quantified by analyzing the contour data through post-processing.

[0172] Alternatively, the profilometer 20 can be a white light confocal sensor.

[0173] It is understandable that the screen surface of the foldable screen 13 can be set parallel to the bearing surface 301. Then the first direction is the extension direction of the folding axis N of the foldable electronic device 1, which can be the width direction of the foldable electronic device 1, and the second direction can correspond to the length direction of the foldable electronic device 1.

[0174] In some embodiments of this application, such as Figure 3 As shown, the detection system also includes a mounting frame 30 and a displacement stage 40; the mounting frame 30 is used to mount the profilometer 20. To ensure the position of the profilometer 20, the mounting frame 30 can be a gantry frame. The opening and closing fixture 10 is mounted on the displacement stage 40; the displacement stage 40 is used to drive the opening and closing fixture 10 to adjust the relative positional relationship between the profilometer 20 and the fixture 10. By setting the displacement stage 40, the relative positional relationship between the profilometer 20 and the fixture can be adjusted, allowing the profilometer 20 to collect line profile data from different positions of the foldable electronic device 1. The structure of the displacement stage 40 will be described in detail later.

[0175] In some embodiments of this application, such as Figures 5 to 7 As shown, the base 100 may include a first mounting plate 110 and a second mounting plate 120 spaced apart, and the first mounting plate 110 and the second mounting plate 120 are connected by a support column 130; two third mounting plates 140 may be provided on the side of the first mounting plate 110 away from the second mounting plate 120, the two third mounting plates 140 may be spaced apart in a first direction and perpendicular to the first mounting plate 110, for connection with the flipping mechanism 300, such that the bearing surface 301 of the flipping mechanism 300 is located on the side of the first mounting plate 110 away from the second mounting plate 120.

[0176] In some embodiments of this application, such as Figures 5 to 7As shown, the bearing surface 301 includes a first bearing portion 301a and a second bearing portion 301b; the flipping mechanism 300 includes a first rotating portion 310 and a second rotating portion 320; the first rotating portion 310 includes the first bearing portion 301a; the second rotating portion 320 includes the second bearing portion 301b; the rotation axes of the first rotating portion 310 and the second rotating portion 320 coincide with the rotation axis M of the flipping mechanism 300; the first rotating portion 310 and the second rotating portion 320 are used to drive the foldable electronic device 1 to fold or flatten along the folding axis N. The first rotating portion 310 is used to drive the first body 11 to rotate, and the second rotating portion 320 is used to drive the second body 12 to rotate; the rotation axes of the first rotating portion 310 and the second rotating portion 320 coincide with the rotation axis M of the flipping mechanism 300 to ensure the uniqueness of the rotation center, thereby ensuring rotation accuracy.

[0177] In some embodiments of this application, such as Figures 5 to 7 As shown, the flipping mechanism 300 also includes a first drive structure 330, which drives the first rotating part 310 or the second rotating part 320 to rotate around the rotation axis M. The first drive structure 330 provides power to the first rotating part 310 or the second rotating part 320, thereby enabling the flipping mechanism 300 to fold or flatten the foldable electronic device 1.

[0178] In some embodiments of this application, such as Figures 5 to 7 As shown, the first drive structure 330 includes a first motor 331 and a transmission structure 332; one end of the transmission structure 332 is connected to the first motor 331, and the other end is connected to the first rotating part 310 or the second rotating part 320. During the testing process, the first rotating part 310 can be driven by the first drive structure 330 alone to rotate the first body 11, or the second rotating part 320 can be driven by the first drive structure 330 alone to rotate the second body 12, or the first rotating part 310 can be driven to rotate the first body 11 and the second rotating part 320 can rotate the second body 12 simultaneously. This allows for single-sided or double-sided opening and closing, enabling the folding or flattening of the foldable electronic device 1.

[0179] Optionally, the first rotating part 310 and the second rotating part 320 may be disposed on the side of the first mounting plate 110 away from the second mounting plate 120, the first motor 331 may be disposed between the first mounting plate 110 and the second mounting plate 120 and fixedly connected to the first mounting plate 110; the transmission structure 332 may be disposed on the side of the first mounting plate 110 and the second mounting plate 120.

[0180] In some embodiments of this application, such as Figures 7 to 10 As shown, Figure 8 This is a schematic diagram of the first driving structure 330 from a first-view perspective in an embodiment of this application. Figure 9This is a schematic diagram of the first driving structure 330 from a second perspective in an embodiment of this application. Figure 10 for Figure 8 The exploded structural diagram shows that the transmission structure 332 includes a first transmission wheel 3321, a second transmission wheel 3322, a belt 3323, a connecting shaft 3324, and a bearing 3325. The first transmission wheel 3321 is connected to the output shaft 3311 of the first motor and to the second transmission wheel 3322 via the belt 3323, so that the first transmission wheel 3321 and the second transmission wheel 3322 can rotate synchronously. The second transmission wheel 3322 is connected to the first end of the connecting shaft 3324. The second end of the connecting shaft 3324 is connected to the first rotating part 310 or the second rotating part 320. The connecting shaft 3324 is rotatably connected to the base 100 via the bearing 3325. Optionally, the bearing 3325 can be fixedly connected to the third mounting plate 140, so that the connecting shaft 3324 can be rotatably connected to the third mounting plate 140. The output shaft 3311 of the first motor rotates, driving the first rotating part 310 to rotate. The first transmission wheel 3321 and the second transmission wheel 3322 are connected by a belt 3323 to achieve synchronous rotation. The second transmission wheel 3322 is connected to the first end of the connecting shaft 3324, and the second end of the connecting shaft 3324 is connected to the first rotating part 310 or the second rotating part 320, thereby realizing the driving of the first rotating part 310 or the second rotating part 320 by the first motor 331. The connecting shaft 3324 is rotatably connected to the base 100 through the bearing 3325, realizing the installation between the flipping mechanism 300 and the base 100.

[0181] In some embodiments of this application, reference is returned. Figure 5 and Figure 6The first rotating part 310 has a first connecting ring 311 on each side of the extension direction (first direction) of the rotating shaft M; the second rotating part 320 has a second connecting ring 321 on each side of the extension direction (first direction) of the rotating shaft M; there are two first driving structures 330; each connecting shaft 3324 passes through an adjacent first connecting ring 311 and a second connecting ring 321; one connecting shaft 3324 is fixedly connected to the first connecting ring 311 and rotatably connected to the second connecting ring 321, and the other connecting shaft 3324 is fixedly connected to the second connecting ring 321 and rotatably connected to the first connecting ring 311. Each connecting shaft 3324 passes through an adjacent first connecting ring 311 and a second connecting ring 321, serving as a quasi-axis to ensure that the rotation centers of the first rotating part 310 and the second rotating part 320 are coaxial, thereby guaranteeing the motion accuracy of the flipping mechanism 300 and improving detection accuracy. One connecting shaft 3324 is fixedly connected to the first connecting ring 311 and rotatably connected to the second connecting ring 321, while the other connecting shaft 3324 is fixedly connected to the second connecting ring 321 and rotatably connected to the first connecting ring 311. This ensures that the first rotating part 310 and the second rotating part 320 will not interfere with each other during rotation, thus improving detection accuracy.

[0182] In some embodiments of this application, such as Figure 11 As shown, Figure 11 This is a structural schematic diagram of the opening and closing clamp 10 from a second perspective in an embodiment of this application. The fixing component 200 includes a horizontal fixing component 210 and a vertical fixing component 220. The horizontal fixing component 210 is used to restrict the movement of the foldable electronic device 1 in a first direction and a second direction; the vertical fixing component 220 is used to restrict the movement of the foldable electronic device 1 in a third direction. By restricting the movement of the foldable electronic device 1 in different directions by the horizontal fixing component 210 and the vertical fixing component 220 respectively, the fixing effect is more reliable.

[0183] In some embodiments of this application, such as Figure 11 and Figure 12 As shown, Figure 12 for Figure 11 The top view shows that the horizontal fixing assembly 210 includes at least two positioning clamping mechanisms 211; the positioning clamping mechanisms 211 are fixedly connected to the flipping mechanism 300; the at least two positioning clamping mechanisms 211 are respectively disposed on both sides of the flipping mechanism 300 in the second direction, for limiting the movement of the foldable electronic device 1 in the first direction and / or the second direction. The two positioning clamping mechanisms 211 can be used to fix the first body 11 and the second body 12 respectively, ensuring the reliability of the fixation.

[0184] In some embodiments of this application, such as Figure 11 and Figure 12 As shown, the positioning and clamping mechanism 211 includes a clamping block 2111 and a second driving structure 2112. The clamping block 2111 is used to abut against the foldable electronic device 1. The second driving structure 2112 is used to drive the clamping block 2111 to move in a second direction, so that at least two positioning and clamping mechanisms 211 clamp or release the foldable electronic device 1. The two clamping blocks 2111 can push the foldable electronic device 1 from opposite directions, so that the foldable electronic device 1 is clamped, thereby restricting its movement. The second driving structure 2112 provides power to the clamping block 2111. Furthermore, the clamping block 2111 is designed to directly push the foldable electronic device 1 to achieve clamping. The clamping method is simple and can be applied to foldable electronic devices 1 of different sizes, making the detection system more versatile.

[0185] Optionally, during the clamping process, a compressive force of 0-20N can be applied to the foldable electronic device 1. That is, while opening and closing, a load of 0-20N parallel to the foldable screen 13 and inward can be applied to simulate the force applied by a human hand during the folding or unfolding of the foldable electronic device 1, thereby obtaining a more accurate detection structure.

[0186] In some embodiments of this application, such as Figures 12 to 16 As shown, Figure 13 This is a first-view structural schematic diagram of the first positioning and clamping mechanism 211 in the embodiments of this application. Figure 14 This is a second-view structural schematic diagram of the first positioning and clamping mechanism 211 in the embodiments of this application. Figure 15 for Figure 13 A schematic diagram of the decomposed structure. Figure 16 for Figure 13 An exploded view from another perspective shows that the second drive structure 2112 includes a slider 21121 and a cylinder 21122. The slider 21121 is fixedly connected to the clamping block 2111. The cylinder housing 21123 is slidably connected to the slider 21121, and the cylinder piston rod 21124 is fixedly connected to the slider 21121 to drive the slider 21121 to move in the second direction. Using the cylinder 21122 for driving provides high motion accuracy, high stability, and easy control. Using the slider 21121 to realize the transmission between the cylinder 21122 and the clamping block 2111 is a simple connection method, and the sliding connection method provides higher transmission accuracy.

[0187] Optionally, such as Figure 15 and Figure 16As shown, the cylinder housing 21123 may be provided with a protruding structure 21125, and the sliding member 21121 may be provided with a sliding groove structure 21126 adapted to the protruding structure 21125. The protruding structure 21125 is slidably disposed in the sliding groove structure 21126 to realize the sliding connection between the two. The sliding groove structure 21126 has a guiding function. The sliding member 21121 can be connected to the piston rod 21124 of the cylinder by fasteners. For example, the sliding member 21121 may be provided with a connecting notch 21129. The head of the bolt 21127 and the first nut 21128 are respectively disposed on both sides of the connecting notch 21129. The tail of the bolt 21127 passes through the connecting notch 21129 and is fixedly connected to the piston rod 21124 of the cylinder, thereby realizing the connection between the cylinder 21122 and the sliding member 21121.

[0188] In some embodiments of this application, there may be more than one type of positioning and clamping mechanism 211. Figures 13 to 16 The structure of the first positioning and clamping mechanism 211 in the embodiments of this application is shown, as follows: Figure 17 As shown, Figure 17 This is a schematic diagram of the structure of the second positioning clamping mechanism 211 in this embodiment. The difference between the second positioning clamping mechanism 211 and the first positioning clamping mechanism 211 is that the first clamping block 21111 in the first positioning clamping mechanism 211 and the second clamping block 21112 in the second positioning clamping mechanism 211 have different structures. Their shapes differ at the contact points with the foldable electronic device 1, thereby avoiding obstruction of the side buttons of the foldable electronic device 1, such as mobile phones. The arrangement of the first and second positioning clamping mechanisms 211 can be found in the reference section. Figure 7 The first positioning clamping mechanism 211 and the second positioning clamping mechanism 211 can each be two, symmetrically arranged on both sides of the flipping mechanism 300, so as to provide a uniform pushing force and make the force on the foldable electronic device 1 more uniform.

[0189] In some embodiments of this application, reference continues to be made to Figure 7 The horizontal fixing component 210 also includes at least two limiting members 212; the at least two limiting members 212 are disposed on the bearing surface 301 of the flipping mechanism 300 and spaced apart in the first direction to limit the movement of the foldable electronic device 1 in the first direction. The limiting members 212 play a role in limiting and positioning. In the process of fixing the foldable electronic device 1, the limiting members 212 can be used to position the foldable electronic device 1 first to ensure accurate positioning before the positioning clamping mechanism 211 clamps the foldable electronic device 1. Figure 7 In the illustrated embodiment, there are four limiting members 212, symmetrically arranged on both sides of the foldable electronic device 1, evenly distributed for easy positioning. Figure 6As shown, the bearing surface 301 of the flipping mechanism 300 can be provided with multiple mounting holes 3011 for setting limit members 212 to adapt to foldable electronic devices 1 of different sizes and improve the versatility of the detection device.

[0190] In some embodiments of this application, such as Figures 18 to 20 As shown, Figure 18 This is a first-view structural schematic diagram of the vertical fixing component 220 in the embodiments of this application. Figure 19 This is a structural schematic diagram of the vertical fixing component 220 from a second perspective in an embodiment of this application. Figure 20 for Figure 5 In the side view, the vertical fixing assembly 220 includes a connecting arm 221 and a pressing member 222. The connecting arm 221 is connected to the flipping mechanism 300. The pressing member 222 is connected to the connecting arm 221 and is disposed on the bearing surface 301 side of the flipping mechanism 300, and can move towards or away from the bearing surface 301 in a third-order direction. By moving the pressing member 222 in a third-order direction, the foldable electronic device 1 is pressed onto the bearing surface 301 of the flipping mechanism 300. This vertical fixing assembly 220 can be applied to foldable electronic devices 1 of different sizes, thus having higher versatility.

[0191] In some embodiments of this application, such as Figures 18 to 20 As shown, the pressing component 222 includes a roller 2221 and a connector 2222; the roller 2221 is used to press the foldable electronic device 1; the connector 2222 has a first end connected to the roller 2221 and a second end connected to the connecting arm 221. The outer surface of the roller 2221 is arc-shaped, making it less likely to damage the foldable screen 13.

[0192] In some embodiments of this application, such as Figures 18 to 20 As shown, the second end of connector 2222 is connected to connecting arm 221 via connecting post 223 and spring 224; one end of connecting post 223 is fixedly connected to connecting arm 221, and the other end is a free end; the second end of connector 2222 is slidably connected to connecting post 223; spring 224 is sleeved on the outside of connecting post 223 and abuts against the free end of connecting post 223 and the second end of connector 2222 respectively. With this configuration, the spring force of spring 224 can achieve the pressing effect of pressing member 222, and when it is necessary to release the fixation, simply lift pressing member 222 and compress spring 224, facilitating the assembly and disassembly of foldable electronic device 1.

[0193] In some embodiments of this application, such as Figures 18 to 20As shown, the vertical fixing assembly 220 also includes a guide member 225; the guide member 225 is parallel to and spaced apart from the connecting post 223; one end of the guide member 225 is fixedly connected to the connecting arm 221, and the other end is a free end; the guide member 225 is slidably connected to the connecting member 2222. With this configuration, the guide member 225 has a guiding function, ensuring that the pressing member 222 does not deviate during its upward movement.

[0194] In some embodiments of this application, such as Figures 18 to 20 As shown, the vertical fixing assembly 220 also includes a third drive structure 226, which drives the connecting arm 221 to move the pressing member 222 along the second direction. The third drive structure 226 drives the vertical fixing assembly 220 to move in the second direction to accommodate foldable electronic devices 1 of different sizes.

[0195] Optionally, the structure of the third drive structure 226 can be the same as that of the second drive structure 2112, which will not be described in detail here.

[0196] like Figure 20 As shown, both the horizontal fixing component 210 and the vertical fixing component 220 can be connected to the flipping mechanism 300 to ensure that the foldable electronic device 1 can be reliably fixed to the flipping mechanism 300 as the flipping mechanism 300 moves during the folding or unfolding process of the foldable electronic device 1. Optionally, it can be fixed by means of a motor fixedly connected to the first rotating part 310 or the second rotating part 320.

[0197] In some embodiments of this application, such as Figures 21 to 24 As shown, Figure 21 This is a schematic diagram of the displacement stage 40 in an embodiment of this application. Figure 22 for Figure 21 A schematic diagram of the decomposed structure. Figure 23 This is a schematic diagram of the vertical adjustment mechanism 41 in the embodiments of this application. Figure 24 for Figure 23 The exploded structural diagram shows that the displacement stage 40 includes a vertical adjustment mechanism 41; the vertical adjustment mechanism 41 includes a support base 411, a second motor 412, and a lead screw assembly 413; the output shaft 4121 of the second motor is connected to the lead screw assembly 413, the lead screw assembly 413 is connected to the opening and closing clamp 10, and the opening and closing clamp 10 is slidably connected to the support base 411, so that the second motor 412 can drive the opening and closing clamp 10 to slide in a direction perpendicular to the bearing surface 301 (third direction) through the lead screw assembly 413. The lead screw assembly 413 has high transmission accuracy and strong stability, and can convert the rotation of the second motor 412 into linear motion.

[0198] In some embodiments of this application, such as Figures 21 to 24As shown, the support base 411 includes a side plate 4112 and a guide rail 4113; the lead screw assembly 413 is fixedly connected to the side plate 4112; the guide rail 4113 is fixedly connected to the side plate 4112, extends along a direction perpendicular to the bearing surface 301 (third direction), and is slidably connected to the opening and closing clamp 10. The guide rail 4113 serves to fix and guide, enabling the opening and closing clamp 10 to move more smoothly along the third direction.

[0199] Optionally, there may be two guide rails 4113, which are spaced apart on the side plate 4112 in the second direction.

[0200] Optionally, such as Figures 21 to 24 As shown, the lead screw assembly 413 may include a screw 4131, a second nut 4132, a coupling 4134, and two fixing members 4133. The screw 4131 passes through the fixing member 4133, and the two are rotatably connected. The two fixing members 4133 are spaced apart on the side plate 4112, which rotatably fixes the screw 4131 to the support base 411. One end of the screw 4131 is connected to the output shaft 4121 of the second motor through the connecting shaft 3324. The second nut 4132 is disposed between the two fixing members 4133 and is rotatably connected to the screw 4131. The second nut 4132 is fixedly connected to the base 100 of the opening and closing clamp 10, thereby driving the opening and closing clamp 10 to move in a third direction.

[0201] In some embodiments of this application, such as Figures 21 to 24 As shown, the support base 411 also includes a base plate 4111 and a first support plate 4114. The base plate 4111 and the side plate 4112 are vertically arranged and fixedly connected. The first support plate 4114 is connected to both the base plate 4111 and the side plate 4112, serving a reinforcing function. The vertical adjustment structure may also include a second support plate 414, a first connecting plate 415, a second connecting plate 416, and a slider 417. The second connecting plate 416 is fixedly connected to the second mounting plate 120 of the opening and closing clamp 10. The second support plate 414 is connected to the second connecting plate 416 and the second mounting plate 120, respectively, serving a reinforcing function. The slider 417 is disposed on the first connecting plate 415 and is slidably connected to the guide rail 4113.

[0202] A cable storage box 418 may be provided on the side plate 4112 of the support base 411 for easy cable storage; the cable storage box 418 may be located on the side of the side plate 4112 away from the lead screw assembly 413.

[0203] In some embodiments of this application, such as Figure 25 As shown, Figure 25This is a schematic diagram of the horizontal adjustment mechanism 42 in an embodiment of this application. The displacement stage 40 further includes the horizontal adjustment mechanism 42; the horizontal adjustment mechanism 42 includes a first slide rail 421 and a second slide rail 422; the vertical adjustment mechanism 41 is fixedly connected to the first slide rail 421; the first slide rail 421 is arranged along a first direction, and the second slide rail 422 is arranged along a second direction; the first slide rail 421 and the second slide rail 422 are slidably connected; or, the first slide rail 421 is arranged along the second direction, and the second slide rail 422 is arranged along the first direction; the first slide rail 421 and the second slide rail 422 are slidably connected. Using slide rails makes the movement smoother; the first slide rail 421 and the second slide rail 422 respectively control the movement in the first and second directions, ensuring that the two movement directions do not interfere with each other, resulting in higher movement accuracy.

[0204] Optionally, the horizontal adjustment mechanism 42 may further include a first sliding connector 423, a second sliding connector 424, and a third connecting plate 425; a first sliding groove 4211 may be provided on the first slide rail 421; a second sliding groove 4221 may be provided on the second slide rail 422; the first sliding connector 423 is slidably disposed in the first sliding groove 4211 and fixedly connected to the base plate 4111 of the support seat 411; the second sliding connector 424 is slidably disposed in the second sliding groove 4221 and fixedly connected to the third connecting plate 425, and the third connecting plate 425 is fixedly connected to the first slide rail 421. The displacement stage 40 may further include a bearing seat 43, and the second slide rail 422 is disposed on the bearing seat 43.

[0205] In some embodiments of this application, the detection system further includes a processor (not shown in the figures); the processor is used to process the line contour data acquired by the profilometer 20, and determine whether the folding screen 13 of the foldable electronic device 1 is convex based on the processing result. The processor can process the line contour data using the following method, which includes:

[0206] The line contour data of the preset folding position of the foldable screen 13 at different folding angles are obtained; wherein, the line contour data is obtained by detection through the detection system of any embodiment of the first aspect; the line contour data is the correspondence between the folding angle, the screen detection position and the height of the foldable screen;

[0207] The target screen detection position of the highest point of the foldable screen is determined from the online contour data, and the first correspondence between the folding angle and the height of the foldable screen at the target screen detection position is obtained.

[0208] Based on the first correspondence, the highest point of the anti-arch and the lowest point after the anti-arch is restored are determined; wherein, the highest point of the anti-arch is the peak point of the folded screen height under the target screen detection position, and the lowest point after the anti-arch is the trough point of the folded screen height under the target screen detection position.

[0209] The second correspondence between the screen detection position and the folded screen height at the folding angle of the highest point of the anti-arch is determined, and the third correspondence between the screen detection position and the folded screen height at the folding angle of the lowest point after the anti-arch is restored is determined.

[0210] Calculate the height difference of the folded screen at each corresponding screen detection position in the third correspondence relationship and the second correspondence relationship;

[0211] If there is a height difference greater than the preset distance threshold, the foldable screen 13 is determined to be arched.

[0212] The processor processes the line contour data obtained by the profilometer 20, and compares the processing result with a preset distance threshold to determine whether the folding screen 13 is cambered. If the height difference is greater than the preset distance threshold, the folding screen 13 can be determined to be cambered, which solves the problem of being unable to locate and quantify the camber problem of the folding screen 13 in related technologies.

[0213] The following describes the method of using the detection system according to an embodiment of this application, including the following steps:

[0214] Step 1: Use rollers 2221 and limiting components 212 to fix the position of the foldable electronic device 1;

[0215] Step 2: Clamping block 2111 extends along the second direction to clamp the foldable electronic device 1, while applying a load parallel to the foldable screen 13 inward.

[0216] Step 3: According to the settings of the host computer (not shown in the figure), the three-axis displacement stage 40 moves the flipping mechanism 300 and the foldable electronic device 1 to the designated position;

[0217] Step 4: After starting the measurement, the two first motors 331 of the flipping mechanism 300 drive the first rotating part 310 and the second rotating part 320 to rotate via the belt 3323, thereby driving the foldable electronic device 1 to bend (fold or flatten). At the same time, the line white light confocal sensor (profilometer 20) collects the line profile of the foldable screen 13 in real time.

[0218] Step 5: The first motor 331 and the contour meter 20 are triggered synchronously to collect and record the rotation angle and line contour data of the flipping mechanism 300;

[0219] Step 6: Based on the collected line contour data, identify the sudden changes in the screen contour of the foldable screen 13 during the bending (folding or flattening) process of the foldable electronic device 1, and identify the anti-arching problem of the foldable screen 13.

[0220] The detection system of this application embodiment is compatible with the detection of the flatness of the folding screen 13 and the detection of the anti-arching problem of the folding screen 13 during the opening and closing process (folding or flattening) of the folding electronic device 1; it supports the detection angle range of 0°-60° adjustable.

[0221] like Figures 4 to 7 As shown, an embodiment of the second aspect of this application provides an opening and closing clamp 10 for clamping a foldable electronic device 1, which is applied to the detection system of any embodiment of the first aspect of this application. The opening and closing clamp 10 includes a base 100, a fixing component 200 and a flipping mechanism 300 disposed on the base 100. The fixing component 200 is used to fix the foldable electronic device 1 to the flipping mechanism 300. The flipping mechanism 300 has a rotation axis M and a bearing surface 301 for carrying the foldable electronic device 1, so that the flipping mechanism 300 can drive the foldable electronic device 1 to fold or flatten along the folding axis N to adjust the opening and closing angle of the foldable electronic device 1.

[0222] The opening and closing clamp 10 of this application embodiment can fix the foldable electronic device 1 to the flipping mechanism 300 through the fixing component 200, ensuring that the foldable electronic device 1 will not shift during the process of the flipping mechanism 300 driving the foldable electronic device 1 to fold or flatten along the folding axis N, so as to adjust the opening and closing angle of the foldable electronic device 1, thereby realizing the dynamic folding of the foldable electronic device 1, so as to realize the real-time measurement and data acquisition of the surface contour of the foldable screen 13.

[0223] The method for detecting the anti-arching of a foldable screen according to the embodiments of the third aspect of this application will be described in detail below.

[0224] like Figure 26 As shown, Figure 26 This is a flowchart illustrating a method for detecting the anti-camber of a foldable screen according to an embodiment of this application. A third aspect of this application proposes a method for detecting the anti-camber of a foldable screen, which includes:

[0225] S1. Obtain the line contour data of the preset folding position of the foldable screen at different folding angles;

[0226] The line contour data is obtained by detection through the detection system of any embodiment of the first aspect; the line contour data is the correspondence between the folding angle, the screen detection position and the height of the folding screen;

[0227] S2. Determine the target screen detection position of the highest point of the folding screen from the online contour data, and obtain the first correspondence between the folding angle and the height of the folding screen at the target screen detection position;

[0228] S3. Based on the first correspondence, determine the highest point of the anti-arch and the lowest point after the anti-arch is restored;

[0229] Among them, the highest point of the anti-arch is the peak point of the folded screen height under the target screen detection position, and the lowest point after the anti-arch is the trough point of the folded screen height under the target screen detection position; in some scenarios, when there are multiple trough points, the lowest point after the anti-arch is the first trough point after the highest point of the anti-arch in the time sequence.

[0230] S4. Determine the second correspondence between the screen detection position and the folding screen height at the folding angle of the highest point of the anti-arch and the third correspondence between the screen detection position and the folding screen height at the folding angle of the lowest point after the anti-arch is restored.

[0231] S5. Calculate the height difference of the folded screen at each corresponding screen detection position in the third correspondence relationship and the second correspondence relationship;

[0232] S6. If there is a height difference greater than the preset distance threshold, determine that the foldable screen is arched.

[0233] The anti-arching detection method for foldable screens in this application embodiment processes the line contour data of the preset folding position of the foldable screen at different folding angles. It determines the target screen detection position of the highest point of the foldable screen from the line contour data and obtains a first correspondence between the folding angle and the height of the foldable screen at the target screen detection position. Based on the first correspondence, it determines the highest point of the anti-arching and the lowest point after the anti-arching is restored, thereby determining a second correspondence between the screen detection position and the height of the foldable screen at the folding angle of the highest point of the anti-arching, and a third correspondence between the screen detection position and the height of the foldable screen at the folding angle of the lowest point after the anti-arching is restored. By calculating the height difference between the foldable screen heights at the same screen detection positions in the third and second correspondences and comparing it with a preset distance threshold, it determines whether the foldable screen is anti-arched. When the height difference is greater than the preset distance threshold, the foldable screen is determined to be anti-arched, thus solving the problem in related technologies where the anti-arching problem of foldable screens cannot be located and quantified.

[0234] It should be noted that the angle between the first and second bodies of the foldable electronic device is the opening and closing angle. When the foldable electronic device is in a flattened state, the opening and closing angle is 180°; the folding angle is 180° minus the opening and closing angle; and both the first and second bodies can rotate around the folding axis. Therefore, the rotation angle of both the first and second bodies is half of the folding angle.

[0235] Optionally, such as Figure 27 As shown, Figure 27 This is a schematic diagram of the preset folding positions in the embodiments of this application. The preset folding positions 1, 2, and 3 can be located at one-quarter, one-half, and three-quarters of the length of the axis region S1 of the folding screen 13, respectively. Figure 27The area indicated by the dashed line corresponds to the axis region S1 of the foldable screen. Detecting different preset folding positions helps improve the accuracy of the detection results. During the detection process, the three preset folding positions can be detected separately. If the height difference between the three preset folding positions is not greater than a preset distance threshold, it is determined that the foldable screen 13 does not have an anti-arching effect; if the height difference between any of the three preset folding positions is greater than the preset distance threshold, it is determined that the foldable screen 13 has an anti-arching effect.

[0236] Optionally, the folding angle can range from 0° to 20°. The camber problem in foldable screens is typically triggered at an opening angle of approximately 170°. A 170° opening angle corresponds to a 10° folding angle. Detection within the 0°-20° folding angle range covers the opening angles at which the camber problem is triggered, and this reasonable range is beneficial for improving production efficiency. During the detection process, a fixed opening angle interval can be established, for example, triggering data acquisition at 0.02° intervals, to correlate line contour data with the folding angle.

[0237] like Figures 28 to 30 As shown, Figure 28 This is a line contour curve of the preset folding position (reverse arch folding screen) when the folding angle is 20° in the embodiments of this application. Figure 29 This is a line contour curve (reverse arch folding screen) of the preset folding position when the folding angle is 10° in the embodiments of this application. Figure 30 This is a line contour curve (reverse arch folding screen) of the preset folding position when the folding angle is 0° in the embodiment of this application. The horizontal axis (X) represents the screen detection position. The length of the preset folding position can be evenly divided into 2048 points, each point representing a screen detection position. The overall length of the screen detection position can be 11.6mm. The vertical axis (Z) represents the height of the folding screen.

[0238] In some embodiments of this application, S2, determining the target screen detection position of the highest point of the folding screen from the online contour data, and obtaining a first correspondence between the folding angle and the height of the folding screen at the target screen detection position, includes:

[0239] Step 21: Generate a 3D contour map based on the line contour data;

[0240] like Figure 31 As shown, Figure 31 This is a three-dimensional contour map in the embodiments of this application, wherein the three coordinate axes (X, Y, Z) of the three-dimensional contour map represent the folding angle, the screen detection position, and the folding screen height, respectively.

[0241] Step 22: Obtain the highest point of the foldable screen in the 3D contour map, and obtain the target screen detection position corresponding to the highest point of the foldable screen.

[0242] Figure 31 In the embodiment shown, the value of the target screen detection position corresponding to the highest point of the folding screen is 10mm;

[0243] Step 23: Extract the curve of folding angle and folding screen height at the target screen detection position from the 3D contour map to obtain the first curve, where the first correspondence is the first curve;

[0244] like Figure 32 As shown, Figure 32 This is the first graph in the embodiment of this application, where the horizontal axis (X) represents the folding angle and the vertical axis (Z) represents the height of the folding screen.

[0245] By generating a 3D contour map from the line contour data, the contour of the foldable screen can be shown more clearly, making it easier to accurately identify the highest point of the foldable screen; by generating the first curve, the first correspondence between the folding angle and the height of the foldable screen at the target screen detection position can be reflected more intuitively.

[0246] In some embodiments of this application, S3, determining the highest point of the anti-arch and the lowest point after the anti-arch is restored according to the first correspondence relationship includes:

[0247] Step 31: Calculate the gradient curve of the first curve to obtain the second curve;

[0248] like Figure 33 As shown, Figure 33 This is the second graph in the embodiment of this application, where the horizontal axis (X) represents the folding angle and the vertical axis (Z) represents the gradient;

[0249] Step 32: Determine the point where the gradient is zero in the second curve, and determine the point where the gradient is zero in the first curve to obtain the highest point of the anti-arch and the lowest point after the anti-arch is restored.

[0250] like Figure 32 and Figure 33 As shown by the dashed lines, the left dashed line corresponds to the highest point of the anti-arch, and the right dashed line corresponds to the lowest point after the anti-arch is restored. During the folding process of the folding screen within the folding angle range of 0°-14°, the lowest point after the anti-arch is restored is the point with the lowest height after the highest point of the anti-arch appears, that is, the first point with a gradient of zero after the highest point of the anti-arch appears.

[0251] By obtaining the second curve, the changing trend of the gradient can be observed intuitively, thereby quickly determining the location of the highest point of the anti-arch and the lowest point after the anti-arch recovers.

[0252] In some embodiments of this application, S4, determining the second correspondence between the screen detection position and the folded screen height at the folding angle of the highest point of the anti-arch and the third correspondence between the screen detection position and the folded screen height at the folding angle of the lowest point after the anti-arch is restored, includes:

[0253] Step 41: Determine the highest point of the reverse arch and the lowest point after the reverse arch is restored, and the folding angle of the corresponding points in the first curve to obtain the first folding angle and the second folding angle.

[0254] like Figure 32 and Figure 33 As shown, the first folding angle corresponding to the highest point of the reverse arch is 8.9°, and the second folding angle corresponding to the lowest point after the reverse arch is restored is 9.8°.

[0255] Step 42: Generate curves of screen detection position versus folded screen height at the first folding angle and the second folding angle respectively, to obtain the third curve and the fourth curve. The second correspondence is the third curve, and the third correspondence is the fourth curve.

[0256] like Figure 34 As shown, Figure 34 These are the third and fourth curves in the embodiments of this application, where the horizontal axis (X) represents the screen detection position and the vertical axis (Z) represents the height of the folded screen.

[0257] The third and fourth curves provide a clear visual relationship between the screen heights corresponding to the highest point of the anti-arch and the lowest point after the anti-arch is restored, at different screen detection positions.

[0258] In some embodiments of this application, S5, calculating the height difference of the folded screen height at each identical screen detection position in the third correspondence relationship and the second correspondence relationship, includes:

[0259] Step 51: Calculate the difference curve between the third curve and the fourth curve to obtain the fifth curve;

[0260] like Figure 35 As shown, Figure 35 This is the fifth graph in the embodiments of this application, where the horizontal axis (X) represents the screen detection position and the vertical axis (Z) represents the height difference;

[0261] S6. When there is a height difference greater than a preset distance threshold, determine if the foldable screen is cambered, including:

[0262] Step 61: If there are points in the fifth curve that are higher than the preset distance threshold, determine that the foldable screen is arched.

[0263] Figure 35The dashed line represents the preset distance threshold, which is 0.6mm. This method allows for a more intuitive and rapid determination of whether there are points exceeding the preset distance threshold, and the corresponding screen detection positions of those points.

[0264] like Figures 36 to 38 As shown, Figure 36 This is a line contour curve of the preset folding position (normal folding screen) when the folding angle is 20° in the embodiments of this application. Figure 37 This is a line contour curve of the preset folding position (normal folding screen) when the folding angle is 10° in the embodiments of this application. Figure 38 This is a line contour curve of the preset folding position (normal folding screen) when the folding angle is 0° in the embodiments of this application. (This is achieved by comparing with...) Figures 28 to 30 By comparing the outline diagram of the inverted folding screen shown, it can be concluded that the outline of a normal folding screen does not arch upwards during the folding process.

[0265] The anti-arching detection method for foldable screens in this application embodiment is based on the following principle: the screen height at a certain point of the foldable screen changes with the bending angle. If there is an anti-arching problem, the height of the foldable screen will drop sharply during the process of reaching the highest point and then returning to normal. The process of anti-arching recovery is obtained by detecting the starting point and the ending point of the sharp change through gradient detection. By detecting the difference in the outline height of the foldable screen between the starting point and the ending point, the anti-arching height can be quantified and the severity of anti-arching can be judged according to the threshold.

[0266] It should be noted that in the examples and description of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0267] Although this application has been illustrated and described with reference to certain preferred embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of this application.

Claims

1. A detection system, characterized in that, A detection system is used to detect a foldable screen of a foldable electronic device, the foldable electronic device being foldable along its folding axis, the foldable screen having an axis region corresponding to the position of the folding axis; the detection system includes: An opening and closing clamp includes a base, a fixing component and a flipping mechanism disposed on the base; the fixing component is used to fix the foldable electronic device to the flipping mechanism; the flipping mechanism has a rotation axis and a bearing surface for supporting the foldable electronic device, so that the flipping mechanism can drive the foldable electronic device to fold or flatten along the folding axis to adjust the opening and closing angle of the foldable electronic device; the bearing surface includes a first bearing portion and a second bearing portion; the flipping mechanism includes a first driving structure, a first rotating part and a second rotating part; the first rotating part includes the first bearing portion; the second rotating part includes the second bearing portion; the rotation axes of the first rotating part and the second rotating part coincide to form the rotation axis of the flipping mechanism; the first rotating part and the second rotating part are used to drive the foldable electronic device to fold or flatten along the folding axis; the first driving structure includes a first motor; the first motor is capable of driving the first rotating part or the second rotating part; A profiler is positioned facing the bearing surface of the flipping mechanism and is used to acquire line profile data of the axial region of the folding screen; The first motor and the contour meter are triggered synchronously to collect and record the rotation angle and line contour data of the flipping mechanism; the line contour data is the correspondence between the folding angle, the screen detection position and the height of the folding screen; the folding angle is 180° minus the opening angle.

2. The detection system according to claim 1, characterized in that, The first driving structure includes: a transmission structure; One end of the transmission structure is connected to the first motor, and the other end is connected to the first rotating part or the second rotating part.

3. The detection system according to claim 2, characterized in that, The transmission structure includes: a first transmission wheel, a second transmission wheel, a belt, a connecting shaft, and a bearing; The first transmission wheel is connected to the output shaft of the first motor and is connected to the second transmission wheel via the belt, so that the first transmission wheel and the second transmission wheel can rotate synchronously. The second transmission wheel is connected to the first end of the connecting shaft; The second end of the connecting shaft is connected to the first rotating part or the second rotating part; The connecting shaft is rotatably connected to the base via the bearing.

4. The detection system according to claim 3, characterized in that, The first rotating part is provided with a first connecting ring on each side of the extending direction of the rotating shaft; The second rotating part is provided with a second connecting ring on each side of the extending direction of the rotating shaft; The number of the first driving structures is two; Each of the connecting shafts passes through an adjacent first connecting ring and a second connecting ring; one connecting shaft is fixedly connected to the first connecting ring and rotatably connected to the second connecting ring; the other connecting shaft is fixedly connected to the second connecting ring and rotatably connected to the first connecting ring.

5. The detection system according to any one of claims 1 to 4, characterized in that, The fixing component includes: A horizontal fixing component is used to restrict the movement of the foldable electronic device in a first direction and a second direction; A vertical fixing component is used to restrict the movement of the foldable electronic device in the third direction; The first direction is the extension direction of the rotation axis, and the third direction is the direction perpendicular to the bearing surface. The first direction, the second direction, and the third direction are perpendicular to each other.

6. The detection system according to claim 5, characterized in that, The horizontal fixing assembly includes at least two positioning and clamping mechanisms; The positioning and clamping mechanism is fixedly connected to the flipping mechanism; The at least two positioning and clamping mechanisms are respectively disposed on both sides of the flipping mechanism in the second direction, for limiting the movement of the foldable electronic device in the first direction and / or the second direction.

7. The detection system according to claim 6, characterized in that, The positioning and clamping mechanism includes: Clamping blocks are used to abut against the foldable electronic device; A second drive structure is used to drive the clamping block to move along the second direction so that the at least two positioning clamping mechanisms clamp or release the foldable electronic device.

8. The detection system according to claim 7, characterized in that, The second driving structure includes: A sliding element is fixedly connected to the clamping block; A cylinder, wherein the cylinder housing is slidably connected to the sliding member, and the cylinder piston rod is fixedly connected to the sliding member to drive the sliding member to move along the second direction.

9. The detection system according to claim 6, characterized in that, The horizontal fixing assembly further includes: at least two limiting members; The at least two limiting members are disposed on the bearing surface of the flipping mechanism and are spaced apart in the first direction to restrict the movement of the foldable electronic device in the first direction.

10. The detection system according to claim 5, characterized in that, The vertical fixing component includes: The connecting arm is connected to the flipping mechanism; The pressing component, connected to the connecting arm, is disposed on the bearing surface side of the flipping mechanism and can move towards or away from the bearing surface in a third-party upward direction.

11. The detection system according to claim 10, characterized in that, The pressing component includes: Rollers are used to press the foldable electronic device together; The connector has a first end connected to the roller and a second end connected to the connecting arm.

12. The detection system according to claim 11, characterized in that, The second end of the connector is connected to the connecting arm via a connecting post and a spring; One end of the connecting column is fixedly connected to the connecting arm, and the other end is a free end; The second end of the connector is slidably connected to the connecting post; The spring is sleeved on the outside of the connecting post and abuts against the free end of the connecting post and the second end of the connector, respectively.

13. The detection system according to claim 12, characterized in that, The vertical fixing assembly further includes: a guide member; The guide member is parallel to and spaced apart from the connecting column; One end of the guide is fixedly connected to the connecting arm, and the other end is a free end; the guide is slidably connected to the connecting member.

14. The detection system according to claim 10, characterized in that, The vertical fixing component also includes: a third driving structure; The third driving structure is used to drive the connecting arm, causing the pressing component to move along the second direction.

15. The detection system according to claim 1, characterized in that, The detection system also includes: a displacement stage; The opening and closing clamp is mounted on the displacement stage; The displacement stage is used to drive the opening and closing fixture to move, so as to adjust the relative positional relationship between the profiler and the opening and closing fixture.

16. The detection system according to claim 15, characterized in that, The displacement table includes a vertical adjustment mechanism; the vertical adjustment mechanism includes: a support base, a second motor, and a lead screw assembly; The output shaft of the second motor is connected to the lead screw assembly, the lead screw assembly is connected to the opening and closing clamp, and the opening and closing clamp is slidably connected to the support base, so that the second motor can drive the opening and closing clamp to slide in a direction perpendicular to the bearing surface through the lead screw assembly.

17. The detection system according to claim 16, characterized in that, The support base includes: a side plate and a guide rail; The lead screw assembly is fixedly connected to the side plate; The guide rail is fixedly connected to the side plate, extends in a direction perpendicular to the bearing surface, and is slidably connected to the opening and closing clamp.

18. The detection system according to claim 16, characterized in that, The displacement stage further includes a horizontal adjustment mechanism; the horizontal adjustment mechanism includes: a first slide rail and a second slide rail; The vertical adjustment mechanism is fixedly connected to the first slide rail; The first slide rail is arranged along a first direction, and the second slide rail is arranged along a second direction; the first slide rail and the second slide rail are slidably connected; or, the first slide rail is arranged along a second direction, and the second slide rail is arranged along a first direction; the first slide rail and the second slide rail are slidably connected. The first direction is the extension direction of the rotating shaft, and the second direction is perpendicular to the first direction and parallel to the bearing surface.

19. The detection system according to claim 1, characterized in that, The detection system also includes: a processor; The processor is used to process the line contour data obtained by the profilometer, and determine whether the folding screen of the foldable electronic device is arched based on the processing result.

20. The detection system according to claim 1, characterized in that, The detection system also includes: a mounting bracket; The mounting bracket is used to mount the profilometer.

21. A method for detecting the anti-camber of a foldable screen, characterized in that, The method includes: Obtain line contour data of the preset folding position of the foldable screen at different folding angles; wherein, the line contour data is obtained by the detection system according to any one of claims 1 to 20; the line contour data is the correspondence between the folding angle, the screen detection position and the height of the foldable screen; The target screen detection position of the highest point of the folding screen is determined from the line contour data, and the first correspondence between the folding angle and the height of the folding screen at the target screen detection position is obtained. Based on the first correspondence, the highest point of the anti-arch and the lowest point after the anti-arch is restored are determined; wherein, the highest point of the anti-arch is the peak point of the folded screen height under the target screen detection position, and the lowest point after the anti-arch is the trough point of the folded screen height under the target screen detection position; Determine a second correspondence between the screen detection position and the height of the folded screen at the folding angle of the highest point of the anti-arch, and determine a third correspondence between the screen detection position and the height of the folded screen at the folding angle of the lowest point after the anti-arch is restored; Calculate the height difference of the folded screen at each of the same screen detection positions in the third correspondence relationship and the second correspondence relationship; If there is a height difference greater than a preset distance threshold, the folding screen is determined to be arched.

22. The method for detecting the anti-camber of a foldable screen according to claim 21, characterized in that, The step of determining the target screen detection position of the highest point of the foldable screen in the line contour data, and obtaining the first correspondence between the folding angle and the height of the foldable screen at the target screen detection position, includes: A three-dimensional contour map is generated based on the line contour data; wherein, the three coordinate axes of the three-dimensional contour map represent the folding angle, the screen detection position, and the folding screen height, respectively. The highest point of the foldable screen is obtained from the point with the highest height in the 3D contour map, and the target screen detection position corresponding to the highest point of the foldable screen is obtained. The curve of folding angle and folding screen height at the target screen detection position is extracted from the three-dimensional contour map to obtain the first curve, wherein the first correspondence is the first curve.

23. The method for detecting the anti-camber of a foldable screen according to claim 22, characterized in that, The step of determining the highest point of the anti-arch and the lowest point after the anti-arch is restored based on the first correspondence includes: Calculate the gradient curve of the first curve to obtain the second curve; In the second curve, the point where the gradient is zero is determined, and the point corresponding to the point where the gradient is zero is determined in the first curve to obtain the highest point of the anti-arch and the lowest point after the anti-arch is restored.

24. The method for detecting the anti-camber of a foldable screen according to claim 22, characterized in that, The determination of the second correspondence between the screen detection position and the folded screen height at the folding angle of the highest point of the anti-arch and the third correspondence between the screen detection position and the folded screen height at the folding angle of the lowest point after the anti-arch is restored includes: Determine the highest point of the anti-arch and the lowest point after the anti-arch is restored, and the folding angle of the corresponding points in the first curve to obtain the first folding angle and the second folding angle. Curves of the screen detection position and the height of the folded screen at the first folding angle and the second folding angle are generated respectively to obtain a third curve and a fourth curve, wherein the second correspondence is the third curve and the third correspondence is the fourth curve; The calculation of the height difference of the folded screen at each of the same screen detection positions in the third correspondence relationship and the second correspondence relationship; determining the folded screen to be cambered when there is a height difference greater than a preset distance threshold includes: The difference curve between the third curve and the fourth curve is calculated to obtain the fifth curve; if there is a point in the fifth curve that is higher than a preset distance threshold, the folding screen is determined to be arched.

25. The method for detecting the anti-camber of a foldable screen according to claim 21, characterized in that, The preset folding positions are one-quarter, one-half, and three-quarters of the length of the axial region of the folding screen; the folding angle ranges from 0° to 20°.

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