Detection system, opening and closing clamp and anti-arch detection method of folding screen

Abstract

The embodiment of the invention provides a detection system, an opening and closing clamp and an anti-arch detection method of a folding screen. The detection system is used for detecting a folding screen of the folding type electronic equipment, the folding type electronic equipment can be folded along a folding shaft of the folding type electronic equipment, and the folding screen is provided with a shaft area corresponding to the position of the folding shaft; the detection system comprises an opening and closing clamp and a contourgraph; the opening and closing clamp comprises a base, a fixing assembly and a turnover mechanism, wherein the fixing assembly and the turnover mechanism are arranged on the base. The fixing assembly is used for fixing the folding electronic equipment on the turnover mechanism; the turnover mechanism is provided with a rotating shaft and a bearing surface for bearing the folding type electronic equipment, so that the turnover mechanism can drive the folding type electronic equipment to be folded or flattened along the folding shaft to adjust the opening and closing angle of the folding type electronic equipment; and the contourgraph is arranged towards the bearing surface of the turnover mechanism and is used for acquiring the line contour data of the axis region of the folding screen, so that the state of the folding screen is dynamically detected in the folding or flattening process of the folding electronic equipment.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a detection system, an opening and closing fixture, and a method for detecting the reverse arch of a folding screen. Background Art

[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 folding screen of a foldable electronic device may arch along the axis, a problem known as reverse arching. This problem can also cause unusual noise during the unfolding process, impacting the user experience.

[0003] Currently, this issue is primarily observed, and it's not possible to pinpoint or quantify the folding screen's bulge. When a foldable electronic device is in a hovering state, the bulge disappears. Therefore, how to dynamically detect the folding screen's state during the folding or unfolding process is an urgent problem for those skilled in the art. Summary of the Invention

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

[0005] An embodiment of the first aspect of the present application proposes a detection system for detecting a folding screen of a foldable electronic device, wherein the foldable electronic device can be folded along its folding axis, and the folding screen has an axis area corresponding to the position of the folding axis; the detection system includes an opening and closing fixture and a profilometer; the opening and closing fixture includes a base, and a fixing component and a flipping mechanism arranged on the base; the fixing component is used to fix the foldable electronic device to the flipping mechanism; the flipping mechanism has a rotating axis and a bearing surface for bearing the folding electronic device, so that the flipping mechanism can drive the folding electronic device to fold or flatten along the folding axis to adjust the opening and closing angle of the folding electronic device; the profilometer is arranged towards the bearing surface of the flipping mechanism, and is used to obtain line contour data of the axis area of the folding screen.

[0006] As can be seen from the above, the detection system of the embodiment of the present application 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 area corresponding to the position of the folding axis; the detection system includes an opening and closing fixture and a profilometer; the opening and closing fixture includes a base, and a fixing component and a flipping mechanism arranged on the base; during the detection process, the foldable electronic device is set on the supporting surface of the flipping mechanism, and the folding screen is set in a direction away from the supporting surface, so that the profilometer can obtain the line contour data of the axis area of the folding screen; the folding axis of the folding electronic device is set parallel to the rotation axis of the flipping mechanism, and in a direction perpendicular to the supporting surface. Overlap, fix the foldable electronic device to the flip mechanism through a fixing component; ensure that the foldable electronic device will not shift when the flip mechanism drives 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 dynamic detection of the folding screen state during the folding or flattening of the foldable electronic device, and realizing real-time measurement and data collection of the surface contour of the foldable screen; the opening and closing fixture in the embodiment of the present application is a dynamic bending fixture, which cooperates with the profilometer to measure the contour of the axis area and identify the arch problem, and further, the contour data can be analyzed through post-processing to objectively identify and quantify the degree of arch.

[0007] In some embodiments of the present 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 the first bearing part; the second rotating part includes the second bearing part; the rotation axes of the first rotating part and the second rotating part coincide with 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 unfold along the folding axis.

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

[0010] In some embodiments of the present 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, so that the flipping mechanism can drive the foldable electronic device to fold or unfold.

[0013] In some embodiments of the present 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 detection process, the first rotating part can be driven by only the first driving structure to drive the first body to rotate, or the second rotating part can be driven by only the first driving structure to drive the second body to rotate, or the first rotating part can be driven to rotate the first body and the second rotating part can be driven to rotate at the same time, so that single-sided opening and closing or double-sided opening and closing can be achieved, and both can realize the folding or flattening of the foldable electronic device.

[0016] In some embodiments of the present 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 through 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 through the bearing.

[0021] As can be seen from the above, the output shaft of the first motor rotates to drive the first rotating part to rotate, 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 driving 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 the present application, the first rotating portion is provided with a first connecting ring on both sides of the extending direction of the rotating shaft;

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

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

[0025] Each of the connecting shafts is passed through one of the first connecting rings and one of the second connecting rings that are adjacent to each other; one of the connecting shafts is fixedly connected to the first connecting ring and is rotatably connected to the second connecting ring; the other of the connecting shafts is fixedly connected to the second connecting ring and is rotatably connected to the first connecting ring.

[0026] As can be seen from the above, each connecting shaft is passed through a first connecting ring and a second connecting ring arranged adjacent to each other, and has the function of a quasi-axis, which can make the rotation centers of the first rotating part and the second rotating part coaxial, thereby ensuring the movement accuracy of the flipping mechanism, which is conducive to improving the detection accuracy; one connecting shaft is fixedly connected to the first connecting ring and is rotatably connected to the second connecting ring, and the other connecting shaft is fixedly connected to the second connecting ring and is rotatably connected to the first connecting ring, which can ensure that the first rotating part and the second rotating part will not affect each other during the rotation process, which is conducive to improving the detection accuracy.

[0027] In some embodiments of the present application, the fixing assembly includes:

[0028] a horizontal fixing assembly, for limiting movement of the foldable electronic device in a first direction and a second direction;

[0029] a vertical fixing assembly, used to limit the movement of the foldable electronic device in a third direction;

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

[0031] As can be seen from the above, the horizontal fixing assembly and the vertical fixing assembly respectively restrict the movement of the foldable electronic device in different directions, and the fixing effect is more reliable.

[0032] In some embodiments of the present application, the horizontal fixing assembly 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 arranged on both sides of the flipping mechanism in the second direction, and are used to limit 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 fixation.

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

[0037] A clamping block, configured to abut against the foldable electronic device;

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

[0039] As can be seen from the above, the two clamps can push the foldable electronic device from opposite directions, so that the foldable electronic device is clamped, thereby restricting its movement. The second drive structure provides power for the clamps; and the clamps 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 the present application, the second driving structure includes:

[0041] a sliding member, fixedly connected to the clamping block;

[0042] A cylinder, wherein a housing of the cylinder is slidably connected to the sliding member, and a piston rod of the cylinder 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 drive method has high motion accuracy, high stability and easy control; the sliding part is used to realize the transmission between the cylinder and the clamping block, the connection method is simple, and the sliding connection method has higher transmission accuracy.

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

[0045] The at least two limiting members are arranged on the bearing surface of the flip mechanism and are spaced apart in the first direction, so as to limit the movement of the foldable electronic device in the first direction.

[0046] As can be seen from the above, the limiting member plays the role of limiting and positioning. In the process of fixing the foldable electronic device, the limiting member can be used to position the foldable electronic device first, and then the positioning clamping mechanism can be used to clamp the foldable electronic device after ensuring the accurate position.

[0047] In some embodiments of the present application, the vertical fixing assembly includes:

[0048] a connecting arm connected to the flipping mechanism;

[0049] The pressing piece is connected to the connecting arm, is arranged on the bearing surface side of the turnover mechanism, and can move toward or away from the bearing surface in a third direction.

[0050] As can be seen from the above, the foldable electronic device is pressed onto the supporting surface of the flip mechanism by the movement of the pressing member in the third direction, and this vertical fixing assembly can be applied to foldable electronic devices of different sizes and has higher versatility.

[0051] In some embodiments of the present application, the pressing member includes:

[0052] A roller, used for pressing the foldable electronic device;

[0053] A connecting member, a first end of which is connected to the roller, and a second end of which is connected to the connecting arm.

[0054] As can be seen from the above, the outer surface of the roller is curved, which is not easy to damage the folding screen.

[0055] In some embodiments of the present application, the second end of the connecting member 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 connecting member is slidably connected to the connecting column;

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

[0059] As can be seen from the above, with such a configuration, the pressing effect of the pressing part can be achieved through the elastic force of the spring, and when the fixation needs to be released, the pressing part can be directly lifted and the spring can be compressed, which facilitates the disassembly and assembly of the foldable electronic device.

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

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

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

[0063] As can be seen from the above, with such an arrangement, the guide member has a guiding function, ensuring that the pressing member will not deviate during the movement in the third direction.

[0064] In some embodiments of the present application, the vertical fixing assembly further comprises: a third driving structure;

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

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

[0067] In some embodiments of the present application, the detection system further comprises: a translation stage;

[0068] The opening and closing fixture is arranged on the displacement platform;

[0069] The displacement platform is used to drive the opening and closing fixture to move so as to adjust the relative position relationship between the profilometer and the opening and closing fixture.

[0070] As can be seen from the above, by setting up a translation stage, the relative position relationship between the profilometer and the fixture can be adjusted, so that the profilometer can collect line profile data at different positions of the foldable electronic device.

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

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

[0073] As can be seen from the above, the 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 the present application, the support base includes: side panels and guide rails;

[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 fixture.

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

[0078] In some embodiments of the present application, the translation 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 the first direction, and the second slide rail is arranged along the second direction; the first slide rail and the second slide rail are slidably connected; or, the first slide rail is arranged along the second direction, and the second slide rail is arranged along the first direction; the first slide rail and the second slide rail are slidably connected;

[0081] The first direction is an extending direction of the rotation axis, 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 the slide rail method makes the movement smoother; the first slide rail and the second slide rail control the movement in the first direction and the second direction respectively, ensuring that the two movement directions do not interfere with each other and the movement accuracy is higher.

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

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

[0085] As can be seen from the above, the line profile data obtained by the profilometer is processed by the processor, and the processing result is compared with the preset distance threshold to determine whether the folding screen is arched. When the height difference is greater than the preset distance threshold, it can be determined that the folding screen is arched, which solves the problem in related technologies that the folding screen arch problem cannot be located and quantified.

[0086] In some embodiments of the present application, the detection system further comprises: a mounting frame;

[0087] The mounting bracket is used for mounting 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 the present application proposes an opening and closing clamp, which is 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 arranged on the base; the fixing component is used to fix the foldable electronic device to the flipping mechanism; the flipping mechanism has a rotating axis and a supporting 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.

[0090] As can be seen from the above, the opening and closing fixture of the embodiment of the present application can fix the foldable electronic device to the flip mechanism through a fixing component, ensuring that the foldable electronic device will not shift when the flip mechanism drives 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 dynamic folding of the foldable electronic device, so as to realize real-time measurement and data collection of the surface contour of the folding screen.

[0091] An embodiment of a third aspect of the present application provides a method for detecting an anti-arch of a folding screen, the method comprising:

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

[0093] Determining a target screen detection position of the highest point of the folding screen in the line profile data, and obtaining a first corresponding relationship between a folding angle and a folding screen height at the target screen detection position;

[0094] Determine, based on the first corresponding relationship, the highest point of the inverted arch and the lowest point after the inverted arch is restored; wherein, the highest point of the inverted arch is the peak point of the folding screen height at the target screen detection position, and the lowest point of the inverted arch after the inverted arch is the trough point of the folding screen height at the target screen detection position;

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

[0096] Calculating a height difference between the folding screen heights at the same screen detection positions in the third corresponding relationship and the second corresponding relationship;

[0097] When there is a height difference greater than a preset distance threshold, it is determined that the folding screen is arched.

[0098] As can be seen from the above, the method for detecting the reverse arch of the folding screen in the embodiment of the present application processes the line contour data of the preset folding position of the folding screen at 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. According to the first correspondence, the highest point of the reverse arch and the lowest point after the reverse arch is restored 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 the reverse arch, 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 the reverse arch is restored. By calculating the height difference of the folding screen height at each same screen detection position in the third correspondence and the second correspondence, and comparing it with the preset distance threshold, it is determined whether the folding screen is reverse arched. When the height difference is greater than the preset distance threshold, it can be determined that the folding screen is reverse arched, which solves the problem in the related art that the reverse arch problem of the folding screen cannot be located and quantified.

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

[0100] generating a three-dimensional contour map according to the line profile data; wherein three coordinate axes of the three-dimensional contour map respectively represent the folding angle, the screen detection position, and the folding screen height;

[0101] Obtaining the point with the highest height of the folding screen in the three-dimensional contour image to obtain the highest point of the folding screen, and obtaining the target screen detection position corresponding to the highest point of the folding screen;

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

[0103] As can be seen from the above, by generating a three-dimensional contour graph from the line contour data, the contour of the folding screen can be shown more clearly, which facilitates accurate identification of the highest point of the folding screen; by generating the first curve, the first correspondence between the folding angle and the folding screen height at the target screen detection position can be more intuitively reflected.

[0104] In some embodiments of the present application, determining the highest point of the inverted arch and the lowest point after the inverted arch is restored according to the first corresponding relationship includes:

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

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

[0107] As can be seen from the above, by obtaining the second curve, the changing trend of the gradient can be observed intuitively, thereby quickly determining the positions of the highest point of the inverted arch and the lowest point after the inverted arch recovers.

[0108] In some embodiments of the present application, determining 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 determining 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, include:

[0109] Determine the highest point of the inverted arch and the lowest point of the inverted arch after restoration, and the folding angles of the corresponding points on the first curve to obtain a first folding angle and a second folding angle;

[0110] Generate curves of the screen detection position and the folding screen height at the first folding angle and the second folding angle, respectively, to obtain a third curve and a fourth curve, wherein the second corresponding relationship is the third curve, and the third corresponding relationship is the fourth curve;

[0111] The calculating the height difference between the folding screen heights at the same screen detection positions in the third corresponding relationship and the second corresponding relationship; and determining that the folding screen is arched when there is a height difference greater than a preset distance threshold, includes:

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

[0113] As can be seen from the above, the third curve and the fourth curve can intuitively show the size 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 the present application, the preset folding positions are one quarter, one half, and three quarters of the length of the axis area of the folding screen; the folding angle has a value range of 0°-20°.

[0115] It can be seen from the above that the arch problem of the folding screen is usually triggered when the opening and closing angle is about 170°. The opening and closing angle of 170° corresponds to a folding angle of 10°. Testing within the folding angle range of 0°-20° can cover the opening and closing angles that are triggered by the arch problem of the folding screen, and the range is reasonable, which is conducive to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0116] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0117] Figure 1 A schematic structural diagram of a foldable electronic device according to an embodiment of the present application (in a flattened state);

[0118] Figure 2 A schematic structural diagram of a foldable electronic device according to an embodiment of the present application (folded state);

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

[0120] Figure 4 A diagram showing the connection between the opening and closing fixture and the foldable electronic device in an embodiment of the present application;

[0121] Figure 5 This is a schematic structural diagram of the opening and closing clamp from a first perspective in an embodiment of the present application;

[0122] Figure 6 for Figure 5 Schematic diagram of the decomposition structure;

[0123] Figure 7 for Figure 4 A top view of

[0124] Figure 8 This is a structural diagram of the first driving structure from a first perspective in an embodiment of the present application;

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

[0126] Figure 10 for Figure 8 Schematic diagram of the decomposition structure;

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

[0128] Figure 12 for Figure 11 A top view of

[0129] Figure 13 This is a structural schematic diagram of the first positioning and clamping mechanism in the embodiment of the present application from a first perspective;

[0130] Figure 14 This is a structural schematic diagram of the first positioning and clamping mechanism in the embodiment of the present application from a second perspective;

[0131] Figure 15 for Figure 13 Schematic diagram of the decomposition structure;

[0132] Figure 16 for Figure 13 Schematic diagram of the decomposition structure from another perspective;

[0133] Figure 17 This is a structural diagram of the second positioning and clamping mechanism in the embodiment of the present application;

[0134] Figure 18 This is a schematic structural diagram of a vertical fixing assembly from a first perspective in an embodiment of the present application;

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

[0136] Figure 20 for Figure 5 Side view of;

[0137] Figure 21 Schematic diagram of the structure of the translation stage in the embodiment of the present application;

[0138] Figure 22 for Figure 21 Schematic diagram of the decomposition structure;

[0139] Figure 23 Schematic diagram of the structure of the vertical adjustment mechanism in the embodiment of the present application;

[0140] Figure 24 for Figure 23 Schematic diagram of the decomposition structure;

[0141] Figure 25 This is a structural diagram of the level adjustment mechanism in an embodiment of the present application;

[0142] Figure 26 This is a flow chart of a method for detecting an anti-arch of a folding screen according to an embodiment of the present application;

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

[0144] Figure 28 This is a line profile curve diagram of a preset folding position when the folding angle is 20° in the embodiment of the present application (reverse arch folding screen);

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

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

[0147] Figure 31 It is a three-dimensional outline diagram in the embodiment of this application;

[0148] Figure 32 This is the first curve diagram in the embodiment of the present application;

[0149] Figure 33 This is the second curve diagram in the embodiment of the present application;

[0150] Figure 34 The third and fourth curves in the embodiment of the present application;

[0151] Figure 35 This is the fifth curve diagram in the embodiment of the present application;

[0152] Figure 36 This is a line profile curve diagram of a preset folding position when the folding angle is 20° in the embodiment of the present application (normal folding screen);

[0153] Figure 37 This is a line profile curve diagram of a preset folding position when the folding angle is 10° in the embodiment of the present application (normal folding screen);

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

[0155] Description of reference numerals:

[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; rotating shaft mechanism 15;

[0157] Opening and closing fixture 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 clamping mechanism 211; clamping block 2111; first clamping block 21111; second clamping block 21112; second driving structure 2112; sliding member 21121; cylinder 21122; cylinder housing 21123; cylinder piston rod 21124; protrusion structure 21125; slide groove structure 21126; bolt 21127; first nut 21128; connecting notch 21129; stopper 212; vertical fixing assembly 220; connecting arm 2 21; pressing member 222; roller 2221; connecting member 2222; connecting column 223; spring 224; guide member 225; third driving structure 226; flip mechanism 300; rotating shaft M; bearing surface 301; first bearing portion 301a; second bearing portion 301b; mounting hole 3011; first rotating portion 310; first connecting ring 311; second rotating portion 320; second connecting ring 321; first driving structure 330; first motor 331; output shaft 3311 of the first motor; transmission structure 332; first transmission pulley 3321; second transmission pulley 3322; belt 3323; connecting shaft 3324; bearing 3325;

[0158] Profilometer 20; mounting bracket 30;

[0159] Displacement platform 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 4121 of second motor; screw assembly 413; screw 4131; second nut 4132; fixing member 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 slot 4211; second slide rail 422; second slide slot 4221; first sliding connector 423; second sliding connector 424; third connecting plate 425; supporting base 43. DETAILED DESCRIPTION

[0160] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

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

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

[0163] With the rapid development of electronic technology, foldable electronic devices are becoming more and more popular among consumers. Foldable electronic devices can be folded along their folding axis. During the folding process, the axis area of the folding screen of the foldable electronic device will be arched, that is, the reverse arch problem will occur. When it is restored, the reverse arch sound may occur. For example, when it is restored, the screen bamboo book hits the steel sheet or the rotating shaft door panel to produce an abnormal sound, which affects the user experience. At present, the problem is mainly observed, and it is impossible to locate and quantify the reverse arch problem of the folding screen. When the foldable electronic device is in a hovering state, the reverse arch will disappear. Therefore, how to dynamically detect the state of the folding screen during the folding or flattening process of the foldable electronic device is a problem that technical personnel in this field urgently need to solve. In order to solve the above technical problems, the embodiments of the present application provide a detection system, an opening and closing fixture, and a reverse arch detection method for a folding screen.

[0164] Foldable electronic devices may be foldable mobile terminal products such as mobile phones, tablet computers, wearable devices, in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptop computers, ultra-mobile personal computers (UMPCs), netbooks, and personal digital assistants (PDAs). The embodiments of the present application do not limit the specific types of foldable electronic devices.

[0165] For the convenience of explanation, the following embodiments take a foldable electronic device as an example, and illustrate the structure of the foldable electronic device and the structure of the detection system for detecting the foldable electronic device.

[0166] like Figure 1 and Figure 2As shown, Figure 1 This is a structural diagram of a foldable electronic device 1 according to an embodiment of the present application (in a flattened state). Figure 2 This is a structural schematic diagram of the foldable electronic device 1 of an embodiment of the present application (folded state). The foldable electronic device 1 includes a hinge mechanism 15, a first body 11 and a second body 12. The first body 11 and the second body 12 both 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 hinge mechanism 15. The hinge 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 hinge mechanism 15.

[0167] The foldable electronic device 1 also includes a folding screen 13, which includes an axis area S1 and two non-axis areas S2, and the two non-axis areas S2 are respectively located on both sides of the axis area S1; the part of the folding screen 13 corresponding to the axis area S1 covers the hinge mechanism 15; the parts of the folding screen 13 corresponding to the two non-axis areas S2 belong to the first body 11 and the second body 12 respectively, and the parts of the folding 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 folding screen 13 can be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MID) display, a micro organic light-emitting diode (MID) display, a micro organic light-emitting diode (MID) display, a quantum dot light-emitting diode (QLED) display, or a liquid crystal display (LCD), etc. The display 13 can also have a touch function, that is, the display 13 can be a touch screen.

[0169] The structure of the detection system of the embodiment of the present application is described in detail below.

[0170] like Figures 3 to 6 As shown, Figure 3 This is a schematic structural diagram of a detection system according to an embodiment of the present application (equipped with a foldable electronic device 1). Figure 4 : is a diagram showing the connection between the opening and closing fixture 10 and the foldable electronic device 1 in an embodiment of the present application. Figure 5 This is a schematic structural diagram of the opening and closing clamp 10 from a first perspective in an embodiment of the present application. Figure 6 for Figure 5 , for the convenience of description, we can define a first direction, a second direction and a third direction perpendicular to each other, wherein 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 the present application proposes a detection system for detecting a 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 area S1 corresponding to the position of the folding axis N; the detection system includes an opening and closing fixture 10 and a profilometer 20. Specifically, the opening and closing fixture 10 includes a base 100, and a fixing component 200 and a flipping mechanism 300 arranged 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 rotating 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 to adjust the opening and closing angle of the foldable electronic device 1; the profilometer 20 is arranged toward the bearing surface 301 of the flipping mechanism 300, and is used to obtain the line contour data of the axis area S1 of the folding screen 13.

[0171] The detection system of the embodiment of the present application is used to detect the folding screen 13 of the 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 area S1 corresponding to the position of the folding axis N. The detection system includes an opening and closing fixture 10 and a profilometer 20. The opening and closing fixture 10 includes a base 100, a fixing component 200 and a flip mechanism 300 arranged on the base 100. During the detection process, the foldable electronic device 1 is placed on the supporting surface 301 of the flip mechanism 300, so that the folding screen 13 is placed in a direction away from the supporting surface 301, so that the profilometer 20 can obtain line profile data of the axis area 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 arranged parallel to the rotation axis M of the flip mechanism 300, and coincides in a direction perpendicular to the bearing surface 301, and the foldable electronic device 1 is fixed to the flip mechanism 300 by the fixing component 200; ensuring that the foldable electronic device 1 does not shift when the flip mechanism 300 drives 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 dynamic detection of the state of the folding screen 13 during the folding or flattening of the foldable electronic device 1, and realizing real-time measurement and data collection of the surface contour of the foldable screen 13; the opening and closing fixture 10 in the embodiment of the present application is a dynamic bending fixture, which cooperates with the profilometer 20 to perform contour measurement on the axis area S1 to identify the arch problem, and further, the contour data can be analyzed through post-processing to objectively identify and quantify the degree of arch.

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

[0173] It can be understood that the screen surface of the folding screen 13 can be set parallel to the supporting 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 the present application, 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 door-shaped 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 position between the profilometer 20 and the opening and closing fixture 10. By providing the displacement stage 40, the relative position between the profilometer 20 and the fixture can be adjusted, allowing the profilometer 20 to collect line profile data at 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 the present application, Figures 5 to 7 As shown, the base 100 may include a first mounting plate 110 and a second mounting plate 120 that are 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 set on the side of the first mounting plate 110 away from the second mounting plate 120, and the two third mounting plates 140 may be spaced apart in the first direction and arranged perpendicular to the first mounting plate 110, for connecting to the flipping mechanism 300, so 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 the present application, Figures 5 to 7As shown, the supporting surface 301 includes a first supporting portion 301a and a second supporting portion 301b; the flip mechanism 300 includes a first rotating portion 310 and a second rotating portion 320; the first rotating portion 310 includes the first supporting portion 301a; the second rotating portion 320 includes the second supporting 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 flip 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 unfold 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 flip mechanism 300 to ensure the uniqueness of the rotation center, thereby ensuring rotation accuracy.

[0177] In some embodiments of the present application, Figures 5 to 7 As shown, the flip mechanism 300 further includes a first driving structure 330, which is used to drive the first rotating portion 310 or the second rotating portion 320 to rotate around the rotation axis M. The first driving structure 330 provides power to the first rotating portion 310 or the second rotating portion 320, thereby enabling the flip mechanism 300 to drive the foldable electronic device 1 to fold or unfold.

[0178] In some embodiments of the present application, Figures 5 to 7 As shown, the first driving 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 detection process, the first driving structure 330 can drive the first rotating part 310 to rotate the first body 11, or the first driving structure 330 can drive the second rotating part 320 to rotate the second body 12. Alternatively, the first rotating part 310 can be driven to rotate the first body 11, and the second rotating part 320 can be driven to rotate the second body 12 simultaneously. This allows for single-sided or double-sided opening and closing, and both can achieve folding or flattening of the foldable electronic device 1.

[0179] Optionally, the first rotating part 310 and the second rotating part 320 can be arranged on the side of the first mounting plate 110 away from the second mounting plate 120, the first motor 331 can be arranged 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 can be arranged on the side of the first mounting plate 110 and the second mounting plate 120.

[0180] In some embodiments of the present application, Figures 7 to 10 As shown, Figure 8 This is a structural diagram of the first driving structure 330 from a first perspective in an embodiment of the present application. Figure 9This is a structural diagram of the first driving structure 330 from a second perspective in an embodiment of the present application. Figure 10 for Figure 8 The exploded structural diagram of 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 is connected to the second transmission wheel 3322 via the belt 3323, so that the first and second transmission wheels 3321, 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 to drive the first rotating part 310 to rotate, and 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 to realize the installation between the flipping mechanism 300 and the base 100.

[0181] In some embodiments of the present application, refer back to Figure 5 and Figure 6A first connecting ring 311 is provided on both sides of the first rotating part 310 in the extension direction (first direction) of the rotating axis M; a second connecting ring 321 is provided on both sides of the second rotating part 320 in the extension direction (first direction) of the rotating axis M; there are two first driving structures 330; each connecting shaft 3324 is passed 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 is rotatably connected to the second connecting ring 321, and the other connecting shaft 3324 is fixedly connected to the second connecting ring 321 and is rotatably connected to the first connecting ring 311. Each connecting shaft 3324 is passed through a first connecting ring 311 and a second connecting ring 321 that are adjacent to each other, and has the function of a coaxial axis, which can make the rotation centers of the first rotating part 310 and the second rotating part 320 coaxial, thereby ensuring the movement accuracy of the flipping mechanism 300, which is beneficial to improving the detection accuracy; one connecting shaft 3324 is fixedly connected to the first connecting ring 311 and is rotatably connected to the second connecting ring 321, and the other connecting shaft 3324 is fixedly connected to the second connecting ring 321 and is rotatably connected to the first connecting ring 311, which can ensure that the first rotating part 310 and the second rotating part 320 will not affect each other during the rotation process, which is beneficial to improving the detection accuracy.

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

[0183] In some embodiments of the present application, Figure 11 and Figure 12 As shown, Figure 12 for Figure 11 As shown in the top view, the horizontal fixing assembly 210 includes at least two positioning and clamping mechanisms 211; these positioning and clamping mechanisms 211 are fixedly connected to the flip mechanism 300. The at least two positioning and clamping mechanisms 211 are positioned on either side of the flip mechanism 300 in the second direction to restrict movement of the foldable electronic device 1 in the first and / or second directions. The two positioning and clamping mechanisms 211 can be used to secure the first body 11 and the second body 12, respectively, ensuring secure fixation.

[0184] In some embodiments of the present application, Figure 11 and Figure 12 As shown, the positioning and clamping mechanism 211 includes a clamping block 2111 and a second drive structure 2112; the clamping block 2111 is used to abut against the foldable electronic device 1; the second drive 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, clamping the foldable electronic device 1 and restricting its movement. The second drive structure 2112 provides power for the clamping blocks 2111. The clamping blocks 2111 are designed to directly push the foldable electronic device 1 to achieve clamping. This simple clamping method can be applied to foldable electronic devices 1 of different sizes, making the detection system more versatile.

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

[0186] In some embodiments of the present application, Figures 12 to 16 As shown, Figure 13 This is a structural diagram of the first positioning and clamping mechanism 211 from a first perspective in an embodiment of the present application. Figure 14 This is a structural diagram of the first positioning and clamping mechanism 211 from a second perspective in an embodiment of the present application. Figure 15 for Figure 13 Schematic diagram of the decomposition structure, Figure 16 for Figure 13 A schematic diagram of the exploded structure from another perspective shows that the second drive structure 2112 includes a sliding member 21121 and a cylinder 21122. The sliding member 21121 is fixedly connected to the clamping block 2111. The cylinder's housing 21123 is slidably connected to the sliding member 21121, and the cylinder's piston rod 21124 is fixedly connected to the sliding member 21121 to drive the sliding member 21121 in the second direction. The drive method using the cylinder 21122 provides high motion precision, high stability, and easy control. The use of the sliding member 21121 to achieve transmission between the cylinder 21122 and the clamping block 2111 simplifies the connection method, and the sliding connection method has higher transmission precision.

[0187] Alternatively, as Figure 15 and Figure 16As shown, a protrusion structure 21125 may be provided on the outer shell 21123 of the cylinder, and a slide groove structure 21126 compatible with the protrusion structure 21125 may be provided on the sliding member 21121, and the protrusion structure 21125 is slidably set in the slide groove structure 21126 to realize a sliding connection between the two, and the slide groove structure 21126 has a guiding function; the sliding member 21121 can be connected to the piston rod 21124 of the cylinder through a fastener; for example, a connecting notch 21129 may be provided on the sliding member 21121, and the head of the bolt 21127 and the first nut 21128 are respectively arranged on both sides of the connecting notch 21129, and 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 the present application, there may be more than one positioning and clamping mechanism 211. Figures 13 to 16 The structure of the first positioning and clamping mechanism 211 in the embodiment of the present application is shown. Figure 17 As shown, Figure 17 This is a schematic diagram of the structure of the second positioning and clamping mechanism 211 in the embodiment of the present application. The difference between the second positioning and clamping mechanism 211 and the first positioning and clamping mechanism 211 is that the first clamping block 21111 in the first positioning and clamping mechanism 211 and the second clamping block 21112 in the second positioning and clamping mechanism 211 have different structures. The shapes of the parts where they are used to abut against the foldable electronic device 1 are different, so that the side buttons of the foldable electronic device 1 such as a mobile phone can be avoided. The arrangement of the first positioning and clamping mechanism 211 and the second positioning and clamping mechanism 211 can be returned to reference Figure 7 The number of the first positioning and clamping mechanisms 211 and the second positioning and clamping mechanisms 211 can both be two, symmetrically arranged on both sides of the flip mechanism 300, thereby providing a uniform pushing force, making the force on the foldable electronic device 1 more uniform.

[0189] In some embodiments of this application, continue to refer to Figure 7 The horizontal fixing assembly 210 also includes at least two limiting members 212 . These limiting members 212 are disposed on the supporting surface 301 of the flip mechanism 300 and are spaced apart in the first direction to limit the movement of the foldable electronic device 1 in the first direction. The limiting members 212 serve both position limiting and positioning purposes. During the process of securing the foldable electronic device 1 , the limiting members 212 can be used to first position the foldable electronic device 1. Once the position is accurate, the positioning and clamping mechanism 211 can then be used to clamp the foldable electronic device 1 . Figure 7 In the embodiment shown, there are four limiters 212, which are symmetrically arranged on both sides of the foldable electronic device 1 and evenly distributed for easy positioning. Figure 6As shown, the bearing surface 301 of the flip mechanism 300 can be provided with a plurality of mounting holes 3011 for setting the limiting member 212 to adapt to foldable electronic devices 1 of different sizes and improve the versatility of the detection device.

[0190] In some embodiments of the present application, Figures 18 to 20 As shown, Figure 18 2 is a schematic structural diagram of the vertical fixing assembly 220 from a first perspective in an embodiment of the present application. Figure 19 2 is a structural diagram of the vertical fixing assembly 220 in the embodiment of the present application from a second perspective. Figure 20 for Figure 5 As shown 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 flip mechanism 300. The pressing member 222 is connected to the connecting arm 221 and is positioned on the side of the supporting surface 301 of the flip mechanism 300. The pressing member 222 can move toward or away from the supporting surface 301 in the third direction. The movement of the pressing member 222 in the third direction presses the foldable electronic device 1 against the supporting surface 301 of the flip mechanism 300. This vertical fixing assembly 220 is adaptable to foldable electronic devices 1 of different sizes, providing greater versatility.

[0191] In some embodiments of the present application, Figures 18 to 20 As shown, the pressing member 222 includes a roller 2221 and a connecting member 2222; the roller 2221 is used to press the foldable electronic device 1; the connecting member 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 curved, which is not easy to crush the foldable screen 13.

[0192] In some embodiments of the present application, Figures 18 to 20 As shown, the second end of the connecting member 2222 is connected to the connecting arm 221 via a connecting post 223 and a spring 224. One end of the connecting post 223 is fixedly connected to the connecting arm 221, while the other end is free. The second end of the connecting member 2222 is slidably connected to the connecting post 223. The spring 224 is sleeved on the outside of the connecting post 223 and abuts against the free end of the connecting post 223 and the second end of the connecting member 2222. This arrangement allows the elastic force of the spring 224 to achieve the compression of the pressing member 222. When the clamping member 222 needs to be released, the pressing member 222 can be simply lifted to compress the spring 224, thereby facilitating the assembly and disassembly of the foldable electronic device 1.

[0193] In some embodiments of the present application, Figures 18 to 20As shown, the vertical fixing assembly 220 further includes a guide member 225; the guide member 225 is parallel to and spaced 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 free; the guide member 225 is slidably connected to the connecting member 2222. This arrangement provides a guiding function, ensuring that the pressing member 222 does not deviate during movement in the third direction.

[0194] In some embodiments of the present application, Figures 18 to 20 As shown, the vertical fixing assembly 220 further includes a third driving structure 226, which is used to drive the connecting arm 221 to move the pressing member 222 in the second direction. The third driving 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 driving structure 226 may be the same as that of the second driving structure 2112 , and details thereof will not be repeated here.

[0196] like Figure 20 As shown, the horizontal fixing assembly 210 and the vertical fixing assembly 220 can both be connected to the flip mechanism 300, so that when the foldable electronic device 1 is folded or unfolded, the flip mechanism 300 moves with the foldable electronic device 1, ensuring that the foldable electronic device 1 can be securely fixed to the flip mechanism 300. Alternatively, the foldable electronic device 1 can be fixedly connected to the first rotating portion 310 or the second rotating portion 320.

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

[0198] In some embodiments of the present application, 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 in a direction perpendicular to the bearing surface 301 (the third direction), and is slidably connected to the opening and closing clamp 10. The guide rail 4113 serves to fix and guide the opening and closing clamp 10, allowing it to move more smoothly in 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] Alternatively, as Figures 21 to 24 As shown, the screw assembly 413 may include a screw 4131, a second nut 4132, a coupling 4134 and two fixing parts 4133; the screw 4131 is inserted into the fixing part 4133, and the two are rotatably connected. The two fixing parts 4133 are spaced apart on the side plate 4112 to rotatably fix the screw 4131 on the support seat 411; one end of the screw 4131 is connected to the output shaft 4121 of the second motor through the connecting shaft 3324, and the second nut 4132 is arranged between the two fixing parts 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 along the third direction.

[0201] In some embodiments of the present application, Figures 21 to 24 As shown, the support base 411 also includes a bottom plate 4111 and a first support plate 4114. The bottom plate 4111 and the side plates 4112 are arranged vertically and fixedly connected. The first support plate 4114 is respectively connected to the bottom plate 4111 and the side plates 4112 to serve as reinforcement. 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 fixture 10. The second support plate 414 is respectively connected to the second connecting plate 416 and the second mounting plate 120 to serve as reinforcement. The slider 417 is arranged on the first connecting plate 415 and is slidably connected to the guide rail 4113.

[0202] A wire storage box 418 may be provided on the side plate 4112 of the support seat 411 to facilitate storage of cables; the wire storage box 418 may be provided on a side of the side plate 4112 away from the lead screw assembly 413 .

[0203] In some embodiments of the present application, Figure 25 As shown, Figure 25This is a schematic diagram of the structure of the horizontal adjustment mechanism 42 in the embodiment of the present application. The translation stage 40 also includes a 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 the first direction, and the second slide rail 422 is arranged along the 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. The use of slide rails makes movement smoother; the first slide rail 421 and the second slide rail 422 respectively control movement in the first direction and the second direction, ensuring that the two movement directions do not interfere with each other and improving 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. The first slide rail 421 may be provided with a first slide groove 4211, and the second slide rail 422 may be provided with a second slide groove 4221. The first sliding connector 423 is slidably disposed in the first slide groove 4211 and fixedly connected to the bottom plate 4111 of the support base 411. The second sliding connector 424 is slidably disposed in the second slide groove 4221 and fixedly connected to the third connecting plate 425, which is fixedly connected to the first slide rail 421. The translation stage 40 may further include a bearing base 43, with the second slide rail 422 disposed on the bearing base 43.

[0205] In some embodiments of the present application, the detection system further includes a processor (not shown); the processor is configured to process the line profile data acquired by the profilometer 20 and determine whether the foldable screen 13 of the foldable electronic device 1 is arched based on the processing results. The processor may process the line profile data using the following method, including:

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

[0207] Determine a target screen detection position of the highest point of the folding screen in the line profile data, and obtain a first correspondence between the folding angle and the folding screen height at the target screen detection position;

[0208] According to the first corresponding relationship, determine the highest point of the anti-arch and the lowest point after the anti-arch is restored; wherein the highest point of the anti-arch is the peak point of the folding screen height at the target screen detection position, and the lowest point after the anti-arch is restored is the trough point of the folding screen height at the target screen detection position;

[0209] Determine a 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 determine a 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;

[0210] Calculating the height difference between the folding screen heights at the same screen detection positions in the third corresponding relationship and the second corresponding relationship;

[0211] When there is a height difference greater than a preset distance threshold, it is determined that the folding screen 13 is arched.

[0212] The line profile data obtained by the profiler 20 is processed by the processor, and the processing result is compared with the preset distance threshold to determine whether the folding screen 13 is arched. When the height difference is greater than the preset distance threshold, it can be determined that the folding screen 13 is arched, which solves the problem in the related art that the arch problem of the folding screen 13 cannot be located and quantified.

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

[0214] Step 1: Use the roller 2221 and the limiter 212 to fix the position of the foldable electronic device 1;

[0215] Step 2: The clamping block 2111 extends in the second direction to clamp the foldable electronic device 1 while applying an inward load parallel to the foldable screen 13;

[0216] Step 3: According to the position set by the host computer (not shown in the figure), the three-axis translation stage 40 moves the flip 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 flip mechanism 300 drive the first rotating part 310 and the second rotating part 320 to rotate via the belt 3323, causing the foldable electronic device 1 to bend (fold or flatten). At the same time, the linear white light confocal sensor (profilometer 20) collects the line profile of the screen surface of the foldable screen 13 in real time;

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

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

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

[0221] like Figures 4 to 7 As shown, an embodiment of the second aspect of the present application proposes 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 the present application; the opening and closing clamp 10 includes a base 100, and a fixing component 200 and a flipping mechanism 300 arranged 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 rotating axis M and a supporting surface 301 for supporting 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 fixture 10 of the embodiment of the present application can fix the foldable electronic device 1 to the flip mechanism 300 through the fixing component 200, ensuring that the foldable electronic device 1 will not shift when the flip mechanism 300 drives 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 dynamic folding of the foldable electronic device 1, so as to realize real-time measurement and data collection of the screen surface contour of the folding screen 13.

[0223] The following is a detailed description of the anti-arch detection method of the folding screen proposed in the embodiment of the third aspect of the present application.

[0224] like Figure 26 As shown, Figure 26 This is a method flow chart of a method for detecting an inverted dome of a folding screen according to an embodiment of the present application. An embodiment of the third aspect of the present application provides a method for detecting an inverted dome of a folding screen. The method for detecting an inverted dome of a folding screen includes:

[0225] S1. Obtaining line profile data of a preset folding position of the folding screen at different folding angles;

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

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

[0228] S3. Determine the highest point of the inverted arch and the lowest point after the inverted arch is restored based on the first corresponding relationship;

[0229] The highest point of the anti-arch is the peak point of the folding screen height at the target screen detection position, and the lowest point after the anti-arch is restored is the trough point of the folding screen height at the target screen detection position. In some scenarios, when there are multiple trough points, the lowest point after the anti-arch is restored is the first trough point after the highest point of the anti-arch in the time sequence.

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

[0231] S5. Calculate the height difference between the folding screen heights at the same screen detection positions in the third corresponding relationship and the second corresponding relationship;

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

[0233] The method for detecting the reverse arch of a folding screen in an embodiment of the present application processes the obtained line contour data of the preset folding position of the folding screen at different folding angles, determines the target screen detection position of the highest point of the folding screen in the line contour data, and obtains a first correspondence between the folding angle and the height of the folding screen at the target screen detection position. According to the first correspondence, the highest point of the reverse arch and the lowest point after the reverse arch is restored 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 the reverse arch, 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 the reverse arch is restored. By calculating the height difference between the folding screen heights of each same screen detection position in the third correspondence and the second correspondence, and comparing it with the preset distance threshold, it is determined whether the folding screen is reverse arched. When the height difference is greater than the preset distance threshold, it can be determined that the folding screen is reverse arched, which solves the problem in the related art that the reverse arch problem of the folding screen cannot be located and quantified.

[0234] It should be noted that the angle between the first body and the second body 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 the first body and the second body can both rotate around the folding axis, so the rotation angle of the first body and the second body is both half of the folding angle.

[0235] Alternatively, as Figure 27 As shown, Figure 27 Schematic diagram of the preset folding positions in the embodiment of the present application. Preset folding position 1, preset folding position 2, and preset folding position 3 may be respectively one-quarter, one-half, and three-quarters of the length of the axis area S1 of the folding screen 13. Figure 27The range indicated by the dashed line corresponds to the folding screen's axis region S1. Testing different preset folding positions improves the accuracy of the test results. During the test, each of the three preset folding positions can be tested separately. If the height difference between the three preset folding positions is no greater than a preset distance threshold, the folding screen 13 is determined to be free of arching. If the height difference between any of the three preset folding positions is greater than the preset distance threshold, the folding screen 13 is determined to be arched.

[0236] Optionally, the folding angle can range from 0° to 20°. The anti-arch problem of the folding screen is usually triggered when the opening and closing angle is about 170°. The folding angle corresponding to the opening and closing angle of 170° is 10°. Testing within the folding angle range of 0°-20° can cover the opening and closing angles triggered by the anti-arch problem of the folding screen, and the range is reasonable, which is conducive to improving production efficiency. During the detection process, the opening and closing angle interval can be fixed, for example, an interval of 0.02° can trigger data collection once, so as to realize the association between line profile data and folding angle.

[0237] like Figures 28 to 30 As shown, Figure 28 is a line profile curve diagram of a preset folding position when the folding angle is 20° in the embodiment of the present application (reverse arch folding screen), Figure 29 : is a line profile curve (reverse arch folding screen) of a preset folding position when the folding angle is 10° in the embodiment of the present 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 the present application, wherein the horizontal axis (X) represents the screen detection position, and the length of the preset folding position can be evenly corresponded to 2048 points, each point represents a screen detection position, and the overall length of the screen detection position can be 11.6 mm; the vertical axis (Z) represents the height of the folding screen.

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

[0239] Step 21: Generate a three-dimensional contour map based on the line contour data;

[0240] like Figure 31 As shown, Figure 31 is a three-dimensional contour graph in an embodiment of the present application, wherein the three coordinate axes (X, Y, Z) of the three-dimensional contour graph represent the folding angle, the screen detection position, and the folding screen height, respectively;

[0241] Step 22: Obtain the point with the highest height of the folding screen in the three-dimensional contour image to obtain the highest point of the folding screen, and obtain the target screen detection position corresponding to the highest point of the folding 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 10 mm;

[0243] Step 23: extracting a curve of the folding angle and the folding screen height at the target screen detection position from the three-dimensional contour graph to obtain a first curve, wherein the first corresponding relationship is the first curve;

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

[0245] By generating a three-dimensional contour graph from line contour data, the contour of the folding screen can be shown more clearly, facilitating accurate identification of the highest point of the folding screen; by generating a first curve, the first correspondence between the folding angle and the height of the folding screen at the target screen detection position can be more intuitively reflected.

[0246] In some embodiments of the present application, S3, determining the highest point of the inverted arch and the lowest point after the inverted arch is restored according to the first corresponding relationship, includes:

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

[0248] like Figure 33 As shown, Figure 33 This is the second curve graph in the embodiment of the present application, wherein 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 corresponding to the point where the gradient is zero in the first curve to obtain the highest point of the inverted arch and the lowest point after the inverted arch is restored.

[0250] like Figure 32 and Figure 33 As shown by the dotted lines in the figure, the dotted line on the left corresponds to the highest point of the anti-arch, and the dotted line on the right corresponds to the lowest point after the anti-arch is restored. When the folding screen is folded within a 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 positions of the highest point of the inverse arch and the lowest point after the inverse arch recovers.

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

[0253] Step 41: Determine the highest point of the inverted arch and the lowest point after the inverted arch is restored, and the folding angles of the corresponding points on the first curve to obtain a first folding angle and a second folding angle;

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

[0255] Step 42: Generate curves of the screen detection position and the folding screen height at the first folding angle and the second folding angle, respectively, to obtain a third curve and a fourth curve, wherein the second corresponding relationship is the third curve, and the third corresponding relationship is the fourth curve;

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

[0257] The third and fourth curves can intuitively show the size 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.

[0258] In some embodiments of the present application, S5, calculating the height difference between the folding screen heights at the same screen detection positions in the third correspondence and the second correspondence, includes:

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

[0260] like Figure 35 As shown, Figure 35 This is a fifth curve diagram in the embodiment of the present application, wherein 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, determining that the folding screen is arched includes:

[0262] Step 61: If there is a point in the fifth curve whose distance is higher than the preset distance threshold, determine that the folding screen is arched;

[0263] Figure 35The middle dotted line represents the preset distance threshold, which is 0.6 mm. The above method can more intuitively and quickly determine whether there are points exceeding the preset distance threshold, as well as the screen detection position corresponding to the points exceeding the preset distance threshold.

[0264] like Figures 36 to 38 As shown, Figure 36 is a line profile curve diagram of a preset folding position when the folding angle is 20° in the embodiment of the present application (normal folding screen), Figure 37 is a line profile curve diagram of a preset folding position when the folding angle is 10° in the embodiment of the present application (normal folding screen), Figure 38 The line profile curve diagram of the preset folding position when the folding angle is 0° in the embodiment of the present application (normal folding screen) is shown by comparing with Figures 28 to 30 By comparing the line contour diagram of the anti-arch folding screen shown, it can be concluded that the line contour of the normal folding screen will not arch upward during the folding process.

[0265] The method for detecting the arch of the folding screen in the embodiment of the present application is based on the following principle: the screen height at a certain point of the folding screen changes with the change of the bending angle. If there is a problem of arching of the folding screen, the height of the folding screen will drop sharply when the folding screen reaches the highest point and then returns to normal. The starting point and end point of the sharp change are detected by gradient, which is the process of arch recovery. By detecting the difference in the height of the folding screen contour at the starting point and the end point, the arch height can be quantified and the severity of the arch 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, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0267] Although the present application has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the application.

Claims

1. A detection system, characterized in that: A detection system for detecting a foldable electronic device having a foldable screen, wherein the foldable electronic device is foldable along a folding axis thereof, and wherein the foldable screen has an axis area corresponding to the position of the folding axis; the detection system comprises: An opening and closing fixture includes a base, a fixing assembly and a flip mechanism disposed on the base; the fixing assembly is used to fix the foldable electronic device to the flip mechanism; the flip mechanism has a rotation axis and a bearing surface for bearing the foldable electronic device, so that the flip 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; A profilometer is arranged toward the bearing surface of the flip mechanism and is used to obtain line profile data of the axis area of the folding screen.

2. The detection system according to claim 1, characterized in that The bearing surface includes: a first bearing portion and a second bearing portion; The flipping mechanism includes: a first rotating part and a second rotating part; the first rotating part includes the first bearing part; the second rotating part includes the second bearing part; the rotation axes of the first rotating part and the second rotating part coincide with 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 unfold along the folding axis.

3. The detection system according to claim 2, characterized in that The flipping mechanism further includes: a first driving structure; The first driving structure is used to drive the first rotating part or the second rotating part to rotate around the rotating axis.

4. The detection system according to claim 3, characterized in that The first driving structure includes: a first motor and 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.

5. The detection system according to claim 4, 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 through 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 through the bearing.

6. The detection system according to claim 5, characterized in that: The first rotating part is provided with a first connecting ring on both sides of the extending direction of the rotating shaft; The second rotating part is provided with a second connecting ring on both sides of the extending direction of the rotating shaft; The number of the first driving structures is two; Each of the connecting shafts is passed through one of the first connecting rings and one of the second connecting rings that are adjacent to each other; one of the connecting shafts is fixedly connected to the first connecting ring and is rotatably connected to the second connecting ring; the other of the connecting shafts is fixedly connected to the second connecting ring and is rotatably connected to the first connecting ring.

7. The detection system according to any one of claims 1 to 6, characterized in that: The fixing assembly includes: a horizontal fixing assembly, for limiting movement of the foldable electronic device in a first direction and a second direction; a vertical fixing assembly, used to limit the movement of the foldable electronic device in a third direction; The first direction is an extending direction of the rotation axis, the third direction is a direction perpendicular to the bearing surface, and the first direction, the second direction and the third direction are perpendicular to each other.

8. The detection system according to claim 7, 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 arranged on both sides of the flipping mechanism in the second direction, and are used to limit the movement of the foldable electronic device in the first direction and / or the second direction.

9. The detection system according to claim 8, characterized in that: The positioning and clamping mechanism comprises: A clamping block, configured to abut against the foldable electronic device; The second driving structure is used to drive the clamping block to move along the second direction, so that the at least two positioning and clamping mechanisms clamp or release the foldable electronic device.

10. The detection system according to claim 9, characterized in that: The second driving structure includes: a sliding member, fixedly connected to the clamping block; A cylinder, wherein a housing of the cylinder is slidably connected to the sliding member, and a piston rod of the cylinder is fixedly connected to the sliding member to drive the sliding member to move along the second direction.

11. The detection system according to claim 8, characterized in that: The horizontal fixing assembly further includes: at least two limiting members; The at least two limiting members are arranged on the bearing surface of the flip mechanism and are spaced apart in the first direction, so as to limit the movement of the foldable electronic device in the first direction.

12. The detection system according to claim 7, characterized in that: The vertical fixing assembly includes: a connecting arm connected to the flipping mechanism; The pressing piece is connected to the connecting arm, is arranged on the bearing surface side of the turnover mechanism, and can move toward or away from the bearing surface in a third direction.

13. The detection system according to claim 12, characterized in that: The pressing piece includes: A roller, used for pressing the foldable electronic device; A connecting member, a first end of which is connected to the roller, and a second end of which is connected to the connecting arm.

14. The detection system according to claim 13, characterized in that: The second end of the connecting member is connected to the connecting arm via a connecting column 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 connecting member is slidably connected to the connecting column; The spring is sleeved on the outside of the connecting column and abuts against the free end of the connecting column and the second end of the connecting member respectively.

15. The detection system according to claim 14, characterized in that: The vertical fixing assembly further comprises: a guide member; The guide member is parallel to the connecting column and spaced apart; One end of the guide member is fixedly connected to the connecting arm, and the other end is a free end; the guide member is slidably connected to the connecting member.

16. The detection system according to claim 12, characterized in that: The vertical fixing assembly further includes: a third driving structure; The third driving structure is used to drive the connecting arm to drive the pressing member to move along the second direction.

17. The detection system according to claim 1, characterized in that The detection system further includes: a translation stage; The opening and closing fixture is arranged on the displacement platform; The displacement platform is used to drive the opening and closing fixture to move so as to adjust the relative position relationship between the profilometer and the opening and closing fixture.

18. The detection system according to claim 17, characterized in that: The translation stage includes a vertical adjustment mechanism; the vertical adjustment mechanism includes: a support seat, a second motor and a screw assembly; The output shaft of the second motor is connected to the screw assembly, the screw assembly is connected to the opening and closing clamp, and the opening and closing clamp is slidably connected to the support seat, so that the second motor can drive the opening and closing clamp to slide in a direction perpendicular to the bearing surface through the screw assembly.

19. The detection system according to claim 18, characterized in that The support base includes: side plates and guide rails; 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 fixture.

20. The detection system according to claim 18, wherein: The displacement platform 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 the first direction, and the second slide rail is arranged along the second direction; the first slide rail and the second slide rail are slidably connected; or, the first slide rail is arranged along the second direction, and the second slide rail is arranged along the first direction; the first slide rail and the second slide rail are slidably connected; The first direction is the extending direction of the rotation axis, and the second direction is perpendicular to the first direction and parallel to the bearing surface.

21. The detection system according to claim 1, characterized in that The detection system further includes: a processor; The processor is used to process the line profile data acquired by the profilometer, and determine whether the folding screen of the foldable electronic device is arched according to the processing result.

22. The detection system according to claim 1, wherein: The detection system further comprises: a mounting frame; The mounting bracket is used for mounting the profilometer.

23. An opening and closing clamp, characterized in that: Used to clamp foldable electronic devices; the opening and closing fixture includes: a base, and a fixing component and a flip mechanism arranged on the base; The fixing assembly is used to fix the foldable electronic device to the flip mechanism; The flip mechanism has a rotating shaft and a bearing surface for bearing the foldable electronic device, so that the flip 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.

24. A method for detecting the arch of a folding screen, characterized in that: The method comprises: Obtaining line profile data of a preset folding position of the folding screen at different folding angles; wherein the line profile data is obtained by detection by the detection system according to any one of claims 1 to 22; and the line profile data is a correspondence between the folding angle, the screen detection position, and the folding screen height; Determining a target screen detection position of the highest point of the folding screen in the line profile data, and obtaining a first corresponding relationship between a folding angle and a folding screen height at the target screen detection position; Determine, based on the first corresponding relationship, the highest point of the inverted arch and the lowest point after the inverted arch is restored; wherein the highest point of the inverted arch is the peak point of the folding screen height at the target screen detection position, and the lowest point of the inverted arch after the inverted arch is the trough point of the folding screen height at the target screen detection position; Determine a second correspondence between the screen detection position and the height of the folding 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 folding screen at the folding angle of the lowest point after the anti-arch is restored; Calculating the height difference between the folding screen heights at the same screen detection positions in the third corresponding relationship and the second corresponding relationship; When there is a height difference greater than a preset distance threshold, it is determined that the folding screen is arched.

25. The method for detecting the reverse arch of a folding screen according to claim 24, characterized in that: The determining of a target screen detection position of the highest point of the folding screen in the line profile data, and obtaining a first corresponding relationship between a folding angle and a folding screen height at the target screen detection position, includes: generating a three-dimensional contour map according to the line profile data; wherein three coordinate axes of the three-dimensional contour map respectively represent the folding angle, the screen detection position, and the folding screen height; Obtaining the point with the highest height of the folding screen in the three-dimensional contour image to obtain the highest point of the folding screen, and obtaining the target screen detection position corresponding to the highest point of the folding screen; A curve of the folding angle and the folding screen height at the target screen detection position is extracted from the three-dimensional contour map to obtain a first curve, wherein the first corresponding relationship is the first curve.

26. The method for detecting the reverse arch of a folding screen according to claim 25, characterized in that: Determining the highest point of the inverted arch and the lowest point after the inverted arch is restored according to the first corresponding relationship includes: Calculating a gradient curve of the first curve to obtain a second curve; The point where the gradient is zero is determined in the second curve, and the point corresponding to the point where the gradient is zero in the first curve is determined to obtain the highest point of the inverted arch and the lowest point after the inverted arch is restored.

27. The method for detecting the reverse arch of a folding screen according to claim 25, characterized in that: The determining of the second corresponding relationship between the screen detection position and the folding screen height at the folding angle of the highest point of the anti-arch, and the determining of the third corresponding relationship between the screen detection position and the folding screen height at the folding angle of the lowest point after the anti-arch is restored, include: Determine the highest point of the inverted arch and the lowest point of the inverted arch after restoration, and the folding angles of the corresponding points on the first curve to obtain a first folding angle and a second folding angle; Generate curves of the screen detection position and the folding screen height at the first folding angle and the second folding angle, respectively, to obtain a third curve and a fourth curve, wherein the second corresponding relationship is the third curve, and the third corresponding relationship is the fourth curve; The calculating the height difference between the folding screen heights at the same screen detection positions in the third corresponding relationship and the second corresponding relationship; and determining that the folding screen is arched when there is a height difference greater than a preset distance threshold, includes: A difference curve between the third curve and the fourth curve is calculated to obtain a fifth curve; and when there is a point in the fifth curve that is higher than a preset distance threshold, it is determined that the folding screen is arched.

28. The method for detecting the reverse arch of a folding screen according to claim 24, characterized in that: The preset folding positions are one-quarter, one-half and three-quarters of the length of the axis area of the folding screen; the folding angle ranges from 0° to 20°.

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