Foldable electronic equipment

Abstract

The utility model provides foldable electronic equipment which is applied to the technical field of terminals. The foldable electronic equipment comprises at least one rotating shaft assembly; the at least two middle frames are sequentially arranged in the first direction, and every two adjacent middle frames are connected in a foldable mode through a rotating shaft assembly; the flexible display screen is arranged on the same side of the at least two middle frames and the at least one rotating shaft assembly, the flexible display screen can be folded or unfolded in the axis direction of the rotating shaft assembly, and the axis direction is perpendicular to the first direction; the side face, facing the flexible display screen, of at least one rotating shaft assembly and / or at least one middle frame is provided with a protrusion, and when the flexible display screen is in an unfolded state, the protrusion can be used for supporting the flexible display screen to reduce the area of a concave area in the flexible display screen and the depth of the concave, so that the surface of the flexible display screen is basically flat, and the display effect is improved. And the shadow problem is improved.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a foldable electronic device. Background Technology

[0002] Flexible displays have been widely used in various electronic devices, such as foldable electronic devices like mobile phones and tablets. These foldable electronic devices include at least two middle frames arranged in an array and at least one hinge assembly. Two adjacent middle frames can be connected by a hinge assembly. The middle frames and the hinge assembly can be used to provide support for the flexible display. When two adjacent middle frames move towards or away from each other around the hinge assembly, the flexible display installed on the middle frames can be folded or unfolded.

[0003] Ideally, when a flexible display is unfolded, the sides of the frame and hinge assembly facing the display can support it and keep its surface flat. However, manufacturing errors in the frame and hinge assembly, as well as repeated bending of foldable electronic devices, can prevent the frame and / or hinge assembly from accurately reaching the intended top position. This results in an uneven surface, and bulges and depressions on the display surface cause discontinuous visible reflected light, leading to shadows and negatively impacting the user experience. Utility Model Content

[0004] This application provides a foldable electronic device that can solve the problem of uneven surface and light and shadow on flexible displays.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a foldable electronic device, comprising: at least one hinge assembly; at least two middle frames arranged sequentially along a first direction, wherein each pair of adjacent middle frames is foldably connected by a hinge assembly; a flexible display screen disposed on the same side of the at least two middle frames and the at least one hinge assembly, the flexible display screen being foldable or unfoldable along the axial direction of the hinge assembly, the axial direction being perpendicular to the first direction; and at least one hinge assembly and / or at least one middle frame having a protrusion on the side facing the flexible display screen, wherein when the flexible display screen is in the unfolded state, the protrusion is used to support the flexible display screen, making the surface of the flexible display screen substantially flat.

[0007] The foldable electronic device in this application embodiment can be a single-fold or multi-fold (e.g., bi-fold, tri-fold, etc.) electronic device. The folding method of the foldable electronic device can include inward folding and / or outward folding. The surface of the flexible display screen is basically flat, which means that the flatness of the surface of the flexible display screen is less than or equal to a preset value. For example, the preset value can be greater than 0 and less than or equal to 0.3 millimeters (mm).

[0008] Based on the foldable electronic device provided in this application embodiment, when there is a height difference between the side of the hinge assembly facing the flexible display screen and the side of the middle frame facing the flexible display screen, a protrusion can be provided on at least one side of the hinge assembly facing the flexible display screen and / or on at least one side of the middle frame facing the flexible display screen. This protrusion can compensate for the height difference between the hinge assembly and the middle frame, thereby providing support for the flexible display screen, reducing the area and depth of the recessed area on the surface of the flexible display screen, making the surface of the flexible display screen basically flat, and improving the light and shadow.

[0009] In one possible design, each hinge assembly includes at least two foldably connected door panels. At least one target door panel in the hinge assembly has its side facing the flexible display screen lower than a first reference plane. A protrusion is provided on the side of the target door panel facing the flexible display screen. The target door panel can be any one of the door panels in the at least one hinge assembly. The first reference plane is the horizontal plane containing the highest side in a second direction among the sides of the door panels (excluding the target door panel) facing the flexible display screen and the sides of the at least two middle frames facing the flexible display screen. The second direction is perpendicular to the first direction and perpendicular to the axis of the hinge assembly. Specifically, the second direction can be a vertical direction from the middle frame to the flexible display screen or a vertical direction from the door panel of the hinge assembly to the flexible display screen. The number of protrusions on the target door panel can be one or more, and the protrusions can be arranged along the axis of the hinge assembly.

[0010] Based on this design, in the second direction, when at least one target door panel in the pivot assembly faces a side of the flexible display screen that is lower than the first reference plane, protrusions can be provided on each target door panel to compensate for the height difference between each target door panel and other door panels and the middle frame. This allows each target door panel to provide support for the flexible display screen through the protrusions, reducing the depth of the recess in the area corresponding to each target door panel and improving the flatness of the flexible display screen surface.

[0011] In one possible design, the protrusions on the target door panel are located at both ends of the axis of the pivot assembly. This approach can save costs compared to continuously setting multiple protrusions along the axial direction.

[0012] In one possible design, the thickness of the protrusion on the target door panel is equal to or substantially equal to the distance between the side of the target door panel facing the flexible display and the first reference surface. In other words, the height difference between the first surface of the protrusion on the target door panel facing the flexible display and the first reference surface can be less than or equal to a preset error. For example, this preset error can be less than or equal to 0.15 mm.

[0013] In one possible design, the side of the target frame facing the flexible display screen in at least two of the frame mid-frames is lower than the second reference plane, and a protrusion is provided on the side of the target frame facing the flexible display screen. The target door panel is any one of the at least two frame mid-frames. The second reference plane is the horizontal plane containing the highest surface in a second direction among the sides of the mid-frames other than the target frame facing the flexible display screen and the side of the door panel in at least one hinge assembly facing the flexible display screen. The second direction is perpendicular to the first direction and perpendicular to the axial direction of the hinge assembly. The second reference plane may be the same as or different from the first reference plane.

[0014] Based on this design, in the second direction, when the side of at least one target frame facing the flexible display is lower than the second reference plane, protrusions can be provided on each target frame to compensate for the height difference between each target frame and other frames and the door panels in the hinge assembly. This allows each target frame to provide support for the flexible display through the protrusions, reducing the depth of the recess in the area corresponding to each target frame and improving the flatness of the flexible display surface.

[0015] In one possible design, the thickness of the protrusion on the target frame is equal to or substantially equal to the distance between the side of the target frame facing the flexible display and the second reference surface. In other words, the height difference between the first surface of the protrusion on the target frame facing the flexible display and the second reference surface can be less than or equal to a preset error. For example, this preset error can be less than or equal to 0.15 mm.

[0016] In one possible design, the protrusion on the target frame is located in the area of ​​the target frame near the hinge assembly. When the side of the target frame facing the flexible display is low, it will cause an outward bulge in the area of ​​the flexible display opposite the hinge assembly. Placing the protrusion in the area of ​​the target frame near the hinge assembly can make the undulations in the area of ​​the flexible display opposite the hinge assembly smoother, improve the flatness of the display surface, and improve the light and shadow issues.

[0017] In one possible design, the protrusions on the target frame are located in areas near the top and bottom of the flexible display screen. This method is cost-effective compared to continuously providing multiple protrusions on the target frame along an axis parallel to the pivot assembly.

[0018] In one possible design, the shape of the protrusion facing the first surface of the flexible display screen is circular, elliptical, annular, or rectangular.

[0019] In one possible design, the protrusion includes a first sub-protrusion and a second sub-protrusion disposed around the periphery of the first sub-protrusion, wherein the material of the first sub-protrusion is different from the material of the second sub-protrusion. For example, the material of the first sub-protrusion may be a thermosetting adhesive or a soft adhesive, and the material of the second sub-protrusion may be a UV-curable adhesive.

[0020] In one possible design, the viscosity of the protruding material is less than or equal to 30 centipoise seconds (cps).

[0021] In one possible design, the width r of the protrusion facing the first surface of the flexible display satisfies the formula: 1 mm ≤ r ≤ 2.3 mm.

[0022] In one possible design, the width of the first surface of the raised flexible display is less than or equal to the width of the second surface of the raised flexible display facing away from it. That is, the raised part can be a column structure that is narrow at the top and wide at the bottom or a column structure with the same width at the top and bottom. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the disassembled structure of a foldable electronic device provided in an embodiment of this application.

[0024] Figure 2 This is a partial structural diagram of a foldable electronic device in a folded state, provided as an embodiment of this application.

[0025] Figure 3 This is a partial structural diagram of a foldable electronic device in an unfolded state, as provided in an embodiment of this application.

[0026] Figure 4 for Figure 3 AA section diagram.

[0027] Figure 5 This is a partial structural diagram of another foldable electronic device provided in the embodiments of this application when it is in the unfolded state.

[0028] Figure 6 for Figure 5 AA section diagram.

[0029] Figure 7 for Figure 5 Another AA section view.

[0030] Figure 8 This is a partial cross-sectional view of a foldable electronic device in an unfolded state, as provided in an embodiment of this application.

[0031] Figure 9 This is a partial structural diagram of another foldable electronic device provided in the embodiments of this application when it is in the unfolded state.

[0032] Figure 10 for Figure 9 AA section diagram.

[0033] Figure 11 This is a partial structural diagram of another foldable electronic device provided in the embodiments of this application when it is in the unfolded state.

[0034] Figure 12 for Figure 11 AA section diagram.

[0035] Figure 13 A partial cross-sectional view of another foldable electronic device provided in this application embodiment when it is in an unfolded state.

[0036] Figure 14 This is a partial structural diagram of another foldable electronic device provided in the embodiments of this application when it is in the unfolded state.

[0037] Figure 15 for Figure 14 AA section diagram.

[0038] Figure 16 for Figure 14 Another AA section view.

[0039] Figure 17 This is a partial cross-sectional view of another foldable electronic device provided in the embodiments of this application when it is in the unfolded state.

[0040] Figure 18 This is a partial structural diagram of another foldable electronic device provided in the embodiments of this application when it is in the unfolded state.

[0041] Figure label:

[0042] 10. Foldable electronic device; 11. Flexible display screen; 12. Protrusion; 121. First sub-protrusion; 122. Second sub-protrusion; 13. Middle frame; 13a. First middle frame; 13b. Second middle frame; 13c. Third middle frame; 14. Hinge assembly; 141. Door panel; 141a. First door panel; 141b. Second door panel; 141c. Third door panel; 141d. Fourth door panel; 141e. Fifth door panel; 141f. Sixth door panel; 142. Main shaft; 143. First arc arm; 144. Second arc arm; 15. First side arm; 16. Second side arm; 21. First reference plane; 22. Second reference plane. Detailed Implementation

[0043] The technical solutions of the embodiments of this application are described below with reference to the accompanying drawings and related embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements, or elements having the same or similar functions, throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0044] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "at least one" or "one or more" refers to one or more (including two). "Multiple" means two or more, unless otherwise explicitly specified. The term "and / or" is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In the description of this application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc., indicate the orientation or positional relationship based on the installation orientation or positional relationship, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0048] In the embodiments of this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0049] A foldable electronic device generally includes at least two mid-frames arranged in an array, at least one hinge assembly, and a flexible display screen. Each pair of adjacent mid-frames can be foldably connected via a hinge assembly. The flexible display screen can be laid on the mid-frames and hinge assemblies, and has at least two states: an unfolded state and a folded state. When any two adjacent mid-frames move towards each other from their unfolded state via the hinge assembly, the flexible display screen can switch from the unfolded state to the folded state; when two mid-frames move back to their unfolded state via the hinge assembly, the flexible display screen can switch from the folded state to the unfolded state. When the flexible display screen is in the unfolded state, and all mid-frames and hinge assemblies in the foldable electronic device have reached the intended top screen position, the sides of all mid-frames and hinge assemblies facing the flexible display screen can form a support surface. This support surface can abut against the flexible display screen and support it.

[0050] In one scenario, if there are manufacturing or assembly errors in the mid-frame and hinge components, some mid-frames and / or hinge components may fail to reach the intended top screen position. Consequently, a height difference will exist between the sides of some mid-frames facing the flexible display and the sides of some hinge components facing the flexible display, resulting in an uneven support surface. After repeated bending, bulges and dents will appear on the surface of the flexible display, exacerbating creases in the folding area and causing shadows on the display, affecting the user experience. In another scenario, if the repeatability of the mid-frame and hinge components decreases after repeated folding of the electronic device, some mid-frames and / or hinge components may also fail to reach the intended top screen position, resulting in an uneven support surface. The surface of the flexible display will be uneven, and the bulges and dents on the surface will cause discontinuous visible reflected light, leading to shadows on the surface of the flexible display.

[0051] To address the aforementioned technical problems, this application provides a foldable electronic device that can have protrusions on the side of at least one hinge assembly and / or at least one mid-frame facing the flexible display screen. The protrusions can be used to compensate for the height difference between the side of the hinge assembly facing the flexible display screen and the side of the mid-frame facing the flexible display screen, and provide support for the flexible display screen, reduce the area and depth of the recessed area on the surface of the flexible display screen, improve the flatness of the surface of the flexible display screen, and improve the light and shadow.

[0052] Figure 1 This is a schematic diagram of the disassembled structure of a foldable electronic device provided in this application embodiment. The foldable electronic device 10 can be a mobile phone, tablet computer, e-book reader, or other electronic device with folding function. The foldable electronic device 10 can be a foldable screen device with one, two, three, or more folds. The folding method of the foldable electronic device 10 can include inward folding and / or outward folding. Inward folding means that during the process of the foldable electronic device 10 changing from an unfolded state to a folded state, the flexible display screen 11 in the foldable electronic device 10 folds inward, and the flexible display screen 11 is located inside the shell of the foldable electronic device 10. Outward folding means that during the process of the foldable electronic device 10 changing from a folded state to an unfolded state, the flexible display screen 11 in the foldable electronic device 10 folds outward, and the flexible display screen 11 is located outside the shell of the foldable electronic device 10. Inward folding can be an inward folding type that can be folded vertically or horizontally; outward folding can be an outward folding type that can be folded vertically or horizontally. This application embodiment uses a horizontally foldable inward folding mobile phone as an example for illustration.

[0053] The foldable electronic device 10 provided in this embodiment includes a flexible display screen 11, at least one hinge assembly 14, and at least two middle frames 13 arranged along a first direction X. Each pair of adjacent middle frames 13 is foldably connected by a hinge assembly 14, and the flexible display screen 11 is disposed on the same side of the at least two middle frames 13 and the at least one hinge assembly 14. When adjacent middle frames 13 move towards or away from each other via the hinge assembly 14, the flexible display screen 11 can be folded or unfolded along the axial direction Y of the hinge assembly 14, allowing the flexible display screen 11 to switch between an unfolded and folded state. The axial direction Y of the hinge assembly 14 is perpendicular to the first direction X, and the first direction X is parallel to the completely flat surface of the flexible display screen 11 in the unfolded state.

[0054] It should be noted that the number of middle frames 13 and the number of hinge assemblies 14 in the foldable electronic device 10 are related to the number of times the foldable electronic device 10 can be folded. Specifically, the number of folds is equal to the number of hinge assemblies 14, and the number of middle frames 13 is one more than the number of hinge assemblies 14.

[0055] For example, such as Figure 1 As shown, in the case where the foldable electronic device 10 is a single-fold electronic device that can be folded left and right, the foldable electronic device 10 may include two middle frames 13 arranged along the first direction X and a hinge assembly 14, the two middle frames 13 being respectively Figure 1 The first middle frame 13a and the second middle frame 13b shown are foldably connected by a pivot assembly 14. The flexible display screen 11 is located on the same side of the pivot assembly 14, the first middle frame 13a and the second middle frame 13b. When the first middle frame 13a and the second middle frame 13b move towards each other or away from each other through the pivot assembly 14, the flexible display screen 11 can switch between an unfolded state and a folded state.

[0056] For example, in the case where the foldable electronic device 10 is a bi-foldable electronic device that can be folded left and right, the foldable electronic device 10 includes at least three middle frames 13 arranged along a first direction X and two hinge assemblies 14. The three middle frames 13 can be a first middle frame 13a, a second middle frame 13b, and a third middle frame 13c, respectively, and the two hinge assemblies 14 can be a first hinge assembly and a second hinge assembly, respectively. The first middle frame 13a is located to the left of the second middle frame 13b, and the third middle frame 13c is located to the right of the second middle frame 13b. The first middle frame 13a and the second middle frame 13b can be foldably connected via the first hinge assembly, and the second middle frame 13b and the third middle frame 13c can be foldably connected via the second hinge assembly.

[0057] In one possible design, each pivot assembly 14 may include at least two foldably connected door panels 141 and a main shaft 142. When the flexible display screen 11 is in the unfolded state, the at least two door panels 141 in the pivot assembly 14 are arranged along a first direction X. For any door panel 141, the side of the door panel 141 facing away from the flexible display screen 11 can be fixedly connected to one end of an arc arm, and the other end of the arc arm can be rotatably connected to the main shaft 142. The two middle frames 13 located on both sides of the pivot assembly 14 can be rotatably connected to the main shaft 142 through corresponding side arms, wherein one end of each side arm is rotatably connected to the main shaft 142, and the other side arm is fixedly connected to the corresponding middle frame 13.

[0058] In one example, such as Figure 2 The diagram shows a partial structural illustration of a foldable electronic device 10 in its folded state. If the hinge assembly 14 includes two door panels 141, namely a first door panel 141a and a second door panel 141b, then the first door panel 141a and the second door panel 141b can be located on opposite sides of the main shaft 142. The side of the first door panel 141a facing away from the flexible display screen 11 can be fixedly connected to one end of the first arc arm 143, and the other end of the first arc arm 143 is rotatably connected to the main shaft 142. The side of the second door panel 141b facing away from the flexible display screen 11 can be fixedly connected to one end of the second arc arm 144, and the other end of the second arc arm 144 is rotatably connected to the main shaft 142. In another example, such as... Figure 2 As shown, if the pivot assembly 14 includes three door panels 141, namely the first door panel 141a, the second door panel 141b and the third door panel 141c, then the first door panel 141a and the second door panel 141b can be located on both sides of the main shaft 142, and the third door panel 141c can be set on the side of the main shaft 142 facing the flexible display screen 11.

[0059] Furthermore, such as Figure 2As shown, based on the two examples above, the foldable electronic device 10 may further include a first side arm 15 and a second side arm 16. One end of the first side arm 15 is rotatably connected to the main shaft 142, and the other end of the first side arm 15 is fixedly connected to the first middle frame 13a located on the left side of the pivot assembly 14. One end of the second side arm 16 is rotatably connected to the main shaft 142, and the other end of the second side arm 16 is fixedly connected to the second middle frame 13b located on the right side of the pivot assembly 14. The first door panel 141a and the second door panel 141b move towards each other, and the first middle frame 13a and the second middle frame 13b located on both sides of the pivot assembly 14 move towards each other, which can switch the flexible display screen 11 to a folded state. When the pivot assembly 14 is in the folded state, the first door panel 141a and the second door panel 141b are respectively set at an angle to the third door panel 141c, and the first middle frame 13a and the second middle frame 13b are parallel and substantially perpendicular to the third door panel 141c. When the first door panel 141a and the second door panel 141b move in opposite directions, and when the first middle frame 13a and the second middle frame 13b located on both sides of the pivot assembly 14 move in opposite directions, the flexible display screen 11 can be switched to the unfolded state. When the flexible display screen 11 is in the unfolded state, the sides of all the middle frames 13 facing the flexible display screen and the sides of all the door panels in the pivot assembly 14 facing the flexible display screen can form a supporting plane to jointly support the flexible display screen 11.

[0060] In other examples, if the number of door panels 141 in the pivot assembly 14 is greater than three, then... Figure 2 Based on the pivot assembly 14 shown, at least one additional door panel is added to the left side of the first door panel 141a and the right side of the second door panel 141b, and each additional door panel 141 can be rotatably connected to the main shaft 142 through a corresponding arc arm.

[0061] When the foldable electronic device 10 is in the unfolded state, if a door panel 141 in a certain middle frame 13 and / or a certain hinge assembly 14 does not reach the expected top screen position, then in the second direction Z, there will be a certain height difference between the side of the middle frame 13 and door panel 141 that has not reached the expected top screen position and the side of the flexible display screen 11 facing the flexible display screen 11, and the side of the middle frame 13 and door panel 141 that has reached the expected top screen position facing the flexible display screen 11. This will cause some areas of the surface of the flexible display screen 11 to be concave downwards and some areas to bulge. Here, the second direction Z refers to the vertical direction from the middle frame 13 to the flexible display screen 11 or the vertical direction from the door panel 141 of the hinge assembly 14 to the flexible display screen 11. The second direction Z is perpendicular to the first direction X and perpendicular to the axial direction Y of the hinge assembly 14. Based on this, in the foldable electronic device 10 provided in this application embodiment, at least one protrusion 12 can be provided on at least one side of the middle frame 13 facing the flexible display screen 11, and / or on at least one door panel 141 of at least one hinge assembly 14 facing the flexible display screen 11. The protrusion 12 is used to compensate for the height difference between the lower and highest sides of the middle frame 13 and the hinge assembly 14 used to support the flexible display screen 11. By supporting the flexible display screen 11 with the protrusion 12, the area and depth of the recessed area in the flexible display screen 11 are reduced, making the surface of the flexible display screen 11 basically flat.

[0062] It should be noted that the hinge assembly 14 reaching the expected top screen position means that the side of each door panel 141 in the hinge assembly 14 facing the flexible display screen 11 is completely flush with the flexible display screen 11. The middle frame 13 reaching the expected top screen position means that the side of the middle frame 13 facing the flexible display screen 11 is completely flush with the flexible display screen 11. When all the door panels 141 in the middle frame 13 and the hinge assembly 14 reach the expected top screen position, the sides of each middle frame 13 facing the flexible display screen 11 and the sides of each door panel 141 facing the flexible display screen 11 in the hinge assembly 14 are at the same height in the second direction Z, and the sides of each middle frame 13 facing the flexible display screen 11 and the sides of each door panel 141 facing the flexible display screen 11 can form a flat supporting plane.

[0063] The surface of the flexible display screen 11 described in this application embodiment is substantially flat, meaning that the flatness of the surface of the flexible display screen 11 is less than or equal to a preset value. For example, the preset value can be greater than 0 and less than or equal to 0.3 millimeters (mm).

[0064] In this embodiment, the position of the protrusion 12 in the foldable electronic device 10 is related to the height of the sides of each door panel 141 facing the flexible display screen 11 and the sides of each middle frame 13 facing the flexible display screen 11 in the second direction Z. The position of the protrusion 12 will be specifically described below through different embodiments.

[0065] Example 1

[0066] When at least one target door panel in at least one hinge assembly 14 has its side facing the flexible display screen 11 lower than the first reference plane 21, a protrusion 12 can be provided on the side of each target door panel facing the flexible display screen 11. The target door panel is any one of the door panels 141 in all hinge assemblies 14 of the foldable electronic device 10. Multiple target door panels are multiple different door panels 141 in all hinge assemblies 14 of the foldable electronic device 10. These multiple different door panels 141 may belong to the same hinge assembly 14, or they may belong to different hinge assemblies 14, or some of the multiple different door panels 141 may belong to one hinge assembly 14 while others belong to other different hinge assemblies 14. Based on this, when the flexible display screen 11 is in the unfolded state, the protrusion 12 on the target door panels, all the middle frames 13, and the sides of the other door panels 141 (excluding all target door panels) facing the flexible display screen 11 can all support the flexible display screen 11 and make the surface of the flexible display screen 11 substantially flat.

[0067] The first reference plane 21 is the horizontal plane containing the highest surface in the second direction Z of the side of the other door panels 141 (excluding at least one target door panel) of at least one pivot assembly 14 facing the flexible display screen 11 and the side of at least two middle frames 13 facing the flexible display screen 11. Any two of the second direction Z, the first direction X, and the axial direction Y of the pivot assembly 14 are perpendicular to each other, and the second direction Z is perpendicular to the flexible display screen 11.

[0068] Specifically, in one example, if, in the second direction Z, the side of a target door panel facing the flexible display screen 11 among all the hinge assemblies 14 is not only lower than the sides of other door panels 141 facing the flexible display screen 11, but also lower than the sides of all the middle frames 13 facing the flexible display screen 11, and the sides of the other door panels 141 (excluding the target door panel) facing the flexible display screen 11 are at the same height in the second direction Z as the sides of all the middle frames 13 facing the flexible display screen 11, then at least one protrusion 12 can be provided on the side of the target door panel facing the flexible display screen 11. The first reference surface 21 can be the horizontal plane containing the highest surface in the second direction Z among the sides of all the hinge assemblies 14 (excluding the target door panel) facing the flexible display screen 11 and the sides of all the middle frames 13 facing the flexible display screen 11.

[0069] Furthermore, in this example, the thickness of the protrusion 12 on the target door panel can be equal to or substantially equal to the distance between the side of the target door panel facing the flexible display screen 11 and the first reference surface 21. In other words, the height difference between the first surface of the protrusion 12 on the target door panel facing the flexible display screen 11 and the first reference surface 21 in the second direction Z can be less than or equal to a first preset error. Specifically, the thickness t of the protrusion 12 satisfies the formula: |t-d1|≤a, where d1 is the distance between the side of the target door panel with the protrusion 12 facing the flexible display screen 11 and the first reference surface 21, and a is the first preset error. For example, the first preset error can be less than or equal to 0.15mm. Here, "substantially equal to" means that there can be a small deviation between the two. For example, the thickness of the protrusion 12 on the target door panel is less than the distance between the side of the target door panel facing the flexible display screen 11 and the first reference surface 21, and the difference between the two is 0.15mm, or the thickness of the protrusion 12 on the target door panel is greater than the distance between the side of the target door panel facing the flexible display screen 11 and the first reference surface 21, and the difference between the two is 0.15mm.

[0070] For example, Figure 3 This is a partial structural diagram of an electronic device in an unfolded state, provided in an embodiment of this application. Figure 4 for Figure 3 The AA cross-sectional view shows that, assuming the foldable electronic device 10 is a single-fold electronic device, the foldable electronic device 10 includes two middle frames 13 and a hinge assembly 14. The two middle frames 13 are respectively... Figure 3 and Figure 4 The first middle frame 13a and the second middle frame 13b shown in the figure, the pivot assembly 14 includes three door panels 141, the three door panels 141 are respectively Figure 3 and Figure 4 The first door panel 141a, the second door panel 141b, and the third door panel 141c are shown. Based on this, as... Figure 4 As shown, if the sides of the first middle frame 13a, the third door panel 141c, the second door panel 141b, and the second middle frame 13b facing the flexible display screen 11 are at the same height in the second direction Z and are all located on the first reference plane 21, and in the second direction, the side of the first door panel 141a facing the flexible display screen 11 is lower than the first reference plane 21, then a protrusion 12 can be provided on the side of the first door panel 141a facing the flexible display screen 11. The first surface of the protrusion 12 facing the flexible display screen 11 is at approximately the same height as the first reference plane 21, so that the first door panel 141a can provide support for the flexible display screen in the unfolded state through the protrusion 12, reducing the depth of the downward recess in the area of ​​the flexible display screen 11 opposite to the first door panel 141a, and making the flexible display screen 11 in the unfolded state basically flat.

[0071] In another example, if, in the second direction Z, at least two of the target door panels of all the hinge assemblies 14 have sides facing the flexible display screen 11 that are not only lower than the sides of other door panels 141 facing the flexible display screen 11, but also lower than the sides of all the middle frames 13 facing the flexible display screen 11, and the sides of the other door panels 141 (excluding all the target door panels) facing the flexible display screen 11 are at the same height in the second direction Z as the sides of all the middle frames 13 facing the flexible display screen 11, then at least one protrusion 12 can be provided on the side of each target door panel facing the flexible display screen 11. The first reference plane 21 can be the horizontal plane containing the highest surface in the second direction Z among the sides of all the hinge assemblies 14 (excluding all the target door panels) facing the flexible display screen 11 and the sides of all the middle frames 13 facing the flexible display screen 11. Based on this, the protrusions 12 on each target door panel, all the middle frames 13, and the other door panels 141 (excluding all the target door panels) can all provide support for the flexible display screen 11, making the surface of the flexible display screen 11 substantially flat.

[0072] Optionally, in the second direction Z, if at least two target door panels are at the same height on the side facing the flexible display screen 11, the thickness of the protrusion 12 provided on each target door panel can be the same, and the height of the first surface of the protrusion 12 provided on each target door panel facing the flexible display screen 11 is the same or substantially the same as the height of the first reference surface 21.

[0073] For example, Figure 5 This is a partial structural diagram of an electronic device in an unfolded state, provided in an embodiment of this application. Figure 6 for Figure 5 AA section diagram, as shown Figure 5 and Figure 6 As shown, the foldable electronic device 10 is assumed to include a first middle frame 13a, a second middle frame 13b, and a hinge assembly 14 located between the first middle frame 13a and the second middle frame 13b. The hinge assembly 14 includes a first door panel 141a, a second door panel 141b, and a third door panel 141c. Based on this, as... Figure 6As shown, if the sides of the first middle frame 13a facing the flexible display screen 11 and the sides of the second middle frame 13b facing the flexible display screen 11 are at the same height in the second direction Z and are both located on the first reference plane 21, and in the second direction, the sides of the first door panel 141a, the third door panel 141c, and the second door panel 141b facing the flexible display screen 11 are all at the same height and are all below the first reference plane 21, then the first door panel 141a, the third door panel 141c, and the second door panel 141b can all be used as target door panels, and the sides of the first door panel 141a facing the flexible display screen 11 and the sides of the third door panel 141c facing the flexible display screen 11 can all be used as target door panels. At least one protrusion 12 is provided on the side of the first door panel 141a and the side of the second door panel 141b facing the flexible display screen 11. The first surface of the protrusion 12 on each target door panel facing the flexible display screen 11 is at approximately the same height as the first reference surface 21. This allows the first door panel 141a, the second door panel 141b, and the third door panel 141c to provide support for the flexible display screen 11 in the unfolded state through the corresponding protrusion 12, thereby reducing the area of ​​the recessed region on the surface of the flexible display screen 11 and reducing the depth of the downward recess in the area of ​​the flexible display screen 11 opposite to each target door panel, so that the flexible display screen 11 in the unfolded state is basically flat.

[0074] Optionally, in the second direction Z, if at least two target door panels are at different heights facing the flexible display screen 11, the distance between the side of each target door panel facing the flexible display screen 11 and the first reference surface 21 will also be different, and correspondingly, the thickness of the protrusion 12 provided on each target door panel will also be different. The thickness of the protrusion 12 provided on any target door panel is equal to or substantially equal to the distance between the side of the target door panel facing the flexible display screen 11 and the first reference surface 21.

[0075] For example, Figure 7 for Figure 5 Another AA section diagram, such as Figure 7 As shown, if the sides of the first middle frame 13a facing the flexible display screen 11 and the sides of the second middle frame 13b facing the flexible display screen 11 are at the same height in the second direction Z and are both located on the first reference plane 21, and in the second direction, the sides of the first door panel 141a, the third door panel 141c, and the second door panel 141b facing the flexible display screen 11 are at different heights and are all below the first reference plane 21, then protrusions 12 of different thicknesses are respectively provided on the sides of the first door panel 141a, the second door panel 141b, and the third door panel 141c facing the flexible display screen 11. Figure 7As shown, the distance between the side of the first door panel 141a facing the flexible display screen 11 and the first reference surface 21 is less than the distance between the side of the third door panel 141c facing the flexible display screen 11 and the first reference surface 21. The thickness of the protrusion 12 on the first door panel 141a is less than the thickness of the protrusion 12 on the third door panel 141c. The distance between the side of the third door panel 141c facing the flexible display screen 11 and the first reference surface 21 is less than the distance between the side of the second door panel 141b facing the flexible display screen 11 and the first reference surface 21. The thickness of the protrusion 12 on the third door panel 141c is less than the thickness of the protrusion 12 on the second door panel 141b. Furthermore, the first surface of the protrusion 12 on each target door panel has the same or substantially the same thickness as the first reference surface 21 in the second direction Z. Based on this, the first middle frame 13a, the protrusions 12 on each target door panel, and the second middle frame 13b can provide support for the flexible display screen 11 in the unfolded state and make the surface of the flexible display screen 11 substantially flat.

[0076] For example, Figure 8 This is a cross-sectional view (AA) of another foldable electronic device in its unfolded state. Assuming the foldable electronic device 10 is a bi-fold electronic device, it includes three mid-frames 13 and two hinge assemblies 14. The three mid-frames 13 are respectively... Figure 8 The first middle frame 13a, second middle frame 13b, and third middle frame 13c shown have two pivot assemblies 14, which are respectively a first pivot assembly and a second pivot assembly. The first pivot assembly is located between the first middle frame 13a and the second middle frame 13b, and the second pivot assembly is located between the second middle frame 13b and the third middle frame 13c. The first pivot assembly includes a first door panel 141a, a second door panel 141b, and a third door panel 141c, and the second pivot assembly includes a fourth door panel 141d, a fifth door panel 141e, and a sixth door panel 141f. Based on this, as... Figure 8 As shown, if the sides of the first middle frame 13a, the third door panel 141c, the second door panel 141b, the second middle frame 13b, the fourth door panel 141d, the sixth door panel 141f, and the third middle frame 13c facing the flexible display screen 11 are at the same height in the second direction Z and are all located on the first reference plane 21, and the sides of the first door panel 141a and the fifth door panel 141e facing the flexible display screen 11 are at different heights in the second direction Z and are both lower than the first reference plane 21, then protrusions 12 of different thicknesses can be provided on the sides of the first door panel 141a and the fifth door panel 141e facing the flexible display screen 11. Figure 8As shown, the distance between the side of the first door panel 141a facing the flexible display screen 11 and the first reference surface 21 is greater than the distance between the side of the fifth door panel 141e facing the flexible display screen 11 and the first reference surface 21. The thickness of the protrusion 12 provided on the first door panel 141a is greater than the thickness of the protrusion 12 provided on the fifth door panel 141e. Furthermore, the height of the first surface of each protrusion 12 facing the flexible display screen 11 in the second direction Z is equal to or substantially equal to the height of the first reference surface 21 in the second direction Z.

[0077] Example 2

[0078] When at least one of the at least two mid-frames 13 of the foldable electronic device 10 has a side facing the flexible display screen 11 that is lower than the second reference plane 22 in the second direction Z, a protrusion 12 may be provided on the side of the at least one target mid-frame facing the flexible display screen 11. The target mid-frame is any one of all mid-frames 13 in the foldable electronic device 10, and multiple target mid-frames may be multiple different mid-frames 13 among all mid-frames 13 in the foldable electronic device 10. In Embodiment 2, the second reference plane 22 is the horizontal plane containing the highest surface in the second direction Z among the sides of the other mid-frames 13 (excluding at least one target mid-frame) facing the flexible display screen 11 and the side of the door panel 141 in at least one hinge assembly 14 facing the flexible display screen 11.

[0079] In one example, if, in the second direction Z, the side of a target mid-frame 13 facing the flexible display screen 11 is not only lower than the sides of the other mid-frames 13 facing the flexible display screen 11, but also lower than the sides of all door panels 141 facing the flexible display screen 11, and the sides of the other mid-frames 13 facing the flexible display screen 11 and the sides of all door panels 141 facing the flexible display screen 11 are at the same height in the second direction Z, then at least one protrusion 12 can be provided on the side of the target mid-frame facing the flexible display screen 11. The second reference surface 22 can be the horizontal plane of the highest surface in the second direction among the sides of the other mid-frames 13 facing the flexible display screen 11 and the sides of all door panels 141 facing the flexible display screen 11.

[0080] Furthermore, in this example, the thickness of the protrusion 12 on the target frame can be equal to or substantially equal to the distance between the side of the target frame facing the flexible display screen 11 and the second reference surface 22. In other words, the height difference between the first surface of the protrusion 12 on the target frame facing the flexible display screen 11 and the second reference surface 22 in the second direction Z can be less than or equal to a first preset error. Specifically, the thickness t of the protrusion 12 satisfies the formula: |t-d2|≤a, where d2 is the distance between the side of the target frame with the protrusion 12 facing the flexible display screen 11 and the second reference surface 22, and a is the first preset error. For example, the first preset error can be less than or equal to 0.15mm. The phrase "basically equal to" means that there can be a small deviation between the two. For example, the thickness of the protrusion 12 on the target frame is less than the distance between the side of the target frame facing the flexible display screen 11 and the second reference surface 22, and the difference between the two is 0.15mm. Or the thickness of the protrusion 12 on the target frame is greater than the distance between the side of the target frame facing the flexible display screen 11 and the second reference surface 22, and the difference between the two is 0.15mm.

[0081] For example, Figure 9 This is a partial structural diagram of an electronic device in an unfolded state, provided in an embodiment of this application. Figure 10 for Figure 9 The AA cross-sectional view is provided. Assuming the foldable electronic device 10 is a single-fold electronic device, this single-fold electronic device includes a first middle frame 13a, a second middle frame 13b, and a pivot assembly 14 located between the first middle frame 13a and the second middle frame 13b. Based on this, as... Figure 10As shown, if, in the second direction Z, the height of the side of the second middle frame 13b facing the flexible display screen 11 is lower than the height of the side of each door panel 141 facing the flexible display screen 11 and the side of the first middle frame 13a facing the flexible display screen 11 in the pivot assembly 14, and the height of the side of each door panel 141 facing the flexible display screen 11 and the side of the first middle frame 13a facing the flexible display screen 11 are the same in the second direction Z, then the horizontal plane where the side of each door panel 141 facing the flexible display screen 11 and the side of the first middle frame 13a facing the flexible display screen 11 are located can be used as the second reference plane 22, and the second middle frame 13b can be used as the target middle frame, so that a protrusion 12 is provided on the side of the second middle frame 13b facing the flexible display screen 11. The protrusion 12 on the second middle frame 13b faces the first surface of the flexible display screen 11 at the same or basically the same height as the first reference surface 21. When the flexible display screen 11 is in the unfolded state, the protrusion 12 on the second middle frame 13b, the first middle frame 13a, the first door panel 141a, the second door panel 141b and the third door panel 141c in the pivot assembly 14 can jointly support the flexible display screen 11, thereby reducing the depth of the downward recess in the area of ​​the flexible display screen 11 opposite to the second middle frame 13b, and making the surface of the flexible display screen 11 in the unfolded state basically flat.

[0082] In another example, if, in the second direction Z, at least two of the target mid-frames 13 have sides facing the flexible display screen 11 that are not only lower than the sides of the other mid-frames 13 facing the flexible display screen 11, but also lower than the sides of all door panels 141 facing the flexible display screen 11, and the sides of the other mid-frames 13 (excluding all target mid-frames) facing the flexible display screen 11 are at the same height in the second direction Z as the sides of all door panels 141 facing the flexible display screen 11, then at least one protrusion 12 can be provided on the side of each target mid-frame facing the flexible display screen 11. The second reference plane 22 can be the horizontal plane containing the sides of the other mid-frames 13 (excluding all target mid-frames) facing the flexible display screen 11 and the sides of all door panels 141 facing the flexible display screen 11. Based on this, the protrusions 12 provided on each target mid-frame, all door panels 141, and the other mid-frames 13 (excluding all target mid-frames) can jointly support the flexible display screen 11, making the surface of the flexible display screen 11 substantially flat.

[0083] Optionally, in the second direction Z, if at least two target frames are at the same height on the sides facing the flexible display screen 11, the thickness of the protrusions 12 on each target frame can be the same or substantially the same, meaning the difference in thickness between any two protrusions 12 on the target frames can be less than or equal to a second preset error. The thickness of the first surface of each protrusion 12 facing the flexible display screen 11 and the second reference surface 22 in the second direction Z is the same or substantially the same, meaning the height difference between the first surface of each protrusion 12 facing the flexible display screen 11 and the second reference surface 22 can be less than or equal to a first preset error. The second preset error can be greater than the first preset error; for example, the second preset error can be greater than or equal to 0.3 mm.

[0084] For example, such as Figure 11 and Figure 12 As shown, assuming the foldable electronic device 10 is a single-fold electronic device, if the height of the side of the first middle frame 13a facing the flexible display screen 11 in the second direction Z and the height of the side of the second middle frame 13b facing the flexible display screen 11 in the second direction Z are both lower than the height of the side of each door panel 141 facing the flexible display screen 11 in the second direction Z in the hinge assembly 14, and the side of each door panel 141 facing the flexible display screen 11 is at the same height in the second direction Z, then the horizontal plane of the side of each door panel 141 facing the flexible display screen 11 can be used as the second reference plane 22, the first middle frame 13a and the second middle frame 13b can both be used as target middle frames, and a protrusion 12 is provided on the side of the first middle frame 13a facing the flexible display screen 11, and a protrusion 12 is provided on the side of the second middle frame 13b facing the flexible display screen 11. Based on this, as Figure 12 As shown, if the distance between the side of the first middle frame 13a facing the flexible display screen 11 and the second reference surface 22 is equal to the distance between the side of the second middle frame 13b facing the flexible display screen 11 and the second reference surface 22, then the thickness of the protrusion 12 provided on the first middle frame 13a is the same as or substantially the same as the thickness of the protrusion 12 provided on the second middle frame 13b. In the second direction Z, the height of the first surface of the flexible display screen 11 of the protrusions 12 provided on the second middle frame 13a and the second middle frame 13b is the same as or substantially the same as the height of the side of each door panel 141 facing the flexible display screen 11. Here, "substantially the same height" means that the height difference between the two in the second direction Z is less than or equal to a preset error, so that when the flexible display screen 11 is in the unfolded state, the protrusions 12 provided on the first middle frame 13a, the protrusions provided on the second middle frame 13b, and the first door panel 141a, the second door panel 141b, and the third door panel 141c in the pivot assembly 14 can jointly support the flexible display screen 11 and make the surface of the flexible display screen 11 substantially flat.

[0085] Optionally, in the second direction Z, if at least two target frames are at different heights facing the flexible display screen 11, the distance between the side of each target frame facing the flexible display screen 11 and the second reference surface 22 will also be different, and correspondingly, the thickness of the protrusion 12 provided on each target frame will also be different. The thickness of the protrusion 12 provided on a certain target frame is equal to or substantially equal to the distance between the side of that target frame facing the flexible display screen 11 and the second reference surface 22.

[0086] For example, see Figure 13 The diagram shows a partial cross-sectional view of a foldable electronic device. Assuming the foldable electronic device 10 is a bi-fold electronic device, it includes three mid-frames 13 and two hinge assemblies 14. The three mid-frames 13 are respectively... Figure 13 The first middle frame 13a, second middle frame 13b, and third middle frame 13c shown in the diagram have two pivot assemblies 14, which are respectively a first pivot assembly and a second pivot assembly. The first pivot assembly is located between the first middle frame 13a and the second middle frame 13b, and the second pivot assembly is located between the second middle frame 13b and the third middle frame 13c. The first pivot assembly includes a first door panel 141a, a second door panel 141b, and a third door panel 141c, and the second pivot assembly includes a fourth door panel 141d, a fifth door panel 141e, and a sixth door panel 141f. Based on this, as... Figure 13 As shown, if the sides of each door panel 141 in the first pivot assembly facing the flexible display screen 11, the sides of each door panel 141 in the second pivot assembly facing the flexible display screen 11, and the sides of the second middle frame 13b facing the flexible display screen 11 are at the same height in the second direction Z, and are higher than the heights of the sides of the first middle frame 13a and the third middle frame 13c facing the flexible display screen 11 in the second direction Z, then the horizontal plane where the side of the second middle frame 13b faces the flexible display screen 11 can be used as the second reference plane 22. At least one protrusion 12 is provided on the side of the first middle frame 13a facing the flexible display screen 11, and at least one protrusion 12 is provided on the side of the third middle frame 13c facing the flexible display screen 11. Further, if the distance between the side of the first middle frame 13a facing the flexible display screen 11 and the second reference plane 22 is less than the distance between the side of the third middle frame 13c facing the flexible display screen 11 and the second reference plane 22, then as... Figure 12As shown, the thickness of the protrusion 12 on the third middle frame 13c is greater than the thickness of the protrusion 12 on the first middle frame 13a, and the height of the first surface of each protrusion 12 facing the flexible display screen 11 in the second direction Z is the same or basically the same as the height of the second middle frame 13b and the side of each door panel 141 facing the flexible display screen 11 in the second direction Z, thereby reducing the area and depth of the recessed area on the surface of the flexible display screen 11, so that the surface of the flexible display screen 11 in the unfolded state is basically flat.

[0087] Example 3

[0088] Based on the above embodiments one and two, when the height of the side of the target middle frame facing the flexible display screen 11 in the second direction Z of at least two middle frames 13 of the foldable electronic device 10, and the height of the side of the target door panel facing the flexible display screen 11 in the second direction Z of at least one hinge assembly 14, are both lower than the same reference plane, at least one protrusion 12 can be provided on the side of each target middle frame facing the flexible display screen 11, and at least one protrusion 12 can be provided on the side of each target door panel facing the flexible display screen 11. At this time, the first reference plane 21 and the second reference plane 22 are at the same height in the second direction Z, and the first reference plane 21 and the second reference plane 22 are the same reference plane. The first reference plane 21 and the second reference plane 22 are both the horizontal plane of the highest surface in the second direction Z among the sides of all middle frames 13 other than the target middle frame facing the flexible display screen 11 and the sides of all hinge assemblies 14 other than the target door panel facing the flexible display screen 11.

[0089] Specifically, for any target door panel, the thickness of the protrusion 12 on the target door panel can be equal to or substantially equal to the distance between the side of the target door panel facing the flexible display screen 11 and the reference surface, and the height of the side of the protrusion 12 on the target door panel facing the flexible display screen 11 in the second direction Z can be equal to or substantially equal to the height of the reference surface in the second direction Z. Similarly, for any target middle frame, the thickness of the protrusion 12 on the target middle frame can be equal to or substantially equal to the distance between the side of the target middle frame facing the flexible display screen 11 and the reference surface, and the height of the side of the protrusion 12 on the target middle frame facing the flexible display screen 11 in the second direction Z can be equal to or substantially equal to the height of the reference surface in the second direction Z.

[0090] For example, Figure 14 This is a partial structural diagram of an electronic device in an unfolded state, provided in an embodiment of this application. Figure 15 for Figure 14 A type of AA cross-section diagram, Figure 16 for Figure 14Another AA section view. For example... Figures 14 to 16 As shown, assuming the foldable electronic device 10 is a single-fold electronic device, the single-fold electronic device includes: a first middle frame 13a and a second middle frame 13b arranged along a first direction X, and a hinge assembly 14 located between the first middle frame 13a and the second middle frame 13b. Based on this, as Figure 15 As shown, if the height of the side of the second middle frame 13b facing the flexible display screen 11 in the second direction Z is the highest compared to the height of the side of each door panel 141 in the first middle frame 13a and the hinge assembly 14 facing the flexible display screen 11 in the second direction Z, then the horizontal plane where the side of the second middle frame 13b facing the flexible display screen 11 is located can be used as the reference plane. Figure 15 The reference plane is represented by a dashed line parallel to the first direction X. At least one protrusion 12 is provided on the side of the first middle frame 13a facing the flexible display screen 11 and on the side of each door panel 141 facing the flexible display screen 11. Based on this, if the distance between the side of the first middle frame 13a facing the flexible display screen 11 and the reference plane is equal to the distance between the side of each door panel 141 facing the flexible display screen 11 and the reference plane, then the difference between the thicknesses of any two protrusions 12 on the first middle frame 13a and each door panel 141 can be less than or equal to a second preset error, and the second preset error is less than or equal to twice the first preset error.

[0091] like Figure 16 As shown, if the heights of the first middle frame 13a facing the flexible display screen 11, the first door panel 141a facing the flexible display screen 11, the second door panel 141b facing the flexible display screen 11, and the third door panel 141c facing the flexible display screen 11 are all different in the first direction, then the thicknesses of the protrusions 12 provided on the first middle frame 13a, the first door panel 141a, the second door panel 141b, and the third door panel 141c are also different, and the first surface of any protrusion 12 facing the flexible display screen 11 is different from the reference surface. Figure 16 The dashed line parallel to the first direction X represents the reference plane. The height difference in the second direction Z is less than or equal to the first preset error. The protrusion 12 on the first middle frame 13a, the protrusion 12 on each door panel 141, and the side of the second middle frame 13b facing the flexible display screen 11 can jointly support the flexible display screen 11 so that the surface of the flexible display screen 11 is basically flat.

[0092] For example, see Figure 17The partial cross-sectional view of the foldable electronic device shown illustrates that, assuming the foldable electronic device 10 is a bi-fold electronic device, it includes: a first middle frame 13a, a second middle frame 13b, and a third middle frame 13c arranged along a first direction X; a first pivot assembly located between the first middle frame 13a and the second middle frame 13b; and a second pivot assembly located between the second middle frame 13b and the third middle frame 13c. Figure 17 As shown, in the second direction Z, the first door panel 141a, the third door panel 141c, the second middle frame 13b, the fifth door panel 141e, and the sixth door panel 141f in the first pivot assembly are at the same height facing the flexible display screen 11, and are all greater than the heights of the first middle frame 13a, the second door panel 141b, the fourth door panel 141d, and the third middle frame 13c facing the flexible display screen 11. Therefore, the horizontal plane containing any one of the first door panel 141a, the third door panel 141c, the second middle frame 13b, the fifth door panel 141e, and the sixth door panel 141f facing the flexible display screen 11 can be considered as the reference plane. Figure 17 The reference plane is represented by a dashed line parallel to the first direction X. Based on this, at least one protrusion 12 can be provided on the side of the first middle frame 13a, the second door panel 141b, the fourth door panel 141d, and the third middle frame 13c facing the flexible display screen 11. The height difference between the first surface of each protrusion 12 facing the flexible display screen 11 and the reference plane in the second direction Z is less than or equal to the first preset error. The protrusion 12 can be used to support the flexible display screen 11 to reduce the area and depth of the recessed area on the surface of the flexible display screen 11 in the unfolded state, so that the surface of the flexible display screen 11 is basically flat.

[0093] Furthermore, such as Figure 17 As shown in the diagram, if the heights of the sides of the first middle frame 13a, the second door panel 141b, the fourth door panel 141d, and the third middle frame 13c facing the flexible display screen 11 are all different in the second direction Z, then the thicknesses of the protrusions 12 on the first middle frame 13a, the second door panel 141b, the fourth door panel 141d, and the third middle frame 13c will also be different. Figure 17As shown, the height of the side of the second door panel 141b facing the flexible display screen 11, the height of the side of the first middle frame 13a facing the flexible display screen 11, the height of the side of the fourth door panel 141d facing the flexible display screen 11, and the height of the side of the third middle frame 13c facing the flexible display screen 11 decrease sequentially. Correspondingly, the thickness of the protrusion 12 provided on the second door panel 141b, the thickness of the protrusion 12 provided on the first middle frame 13a, the thickness of the protrusion 12 provided on the fourth door panel 141d, and the thickness of the protrusion 12 provided on the third middle frame 13c gradually increase.

[0094] Optionally, in any of the above embodiments, such as Figure 3 , Figure 5 , Figure 8 as well as Figure 14 As shown, for any target door panel with a protrusion 12, the number of protrusions 12 on the side of the target door panel facing the flexible display screen 11 can be one or more. When there is only one protrusion 12 on the target door panel, it can be continuously laid on the target door panel along the axial direction Y of the pivot assembly 14, and the length of the protrusion 12 along the pivot direction Y can be less than or equal to the length of the target door panel along the pivot direction Y. When there are multiple protrusions 12 on the target door panel, the multiple protrusions 12 can be spaced apart along the pivot direction Y, and the positions of the protrusions 12 can avoid fasteners (such as screws) and other parts on the target door panel. The number of protrusions 12 on different target door panels can be the same or different, and the length of each protrusion 12 along the axial direction Y of the pivot assembly 14 can be the same or different.

[0095] This application does not specify the number of protrusions 12 provided on a target door panel. For example, as Figure 5 and Figure 14 As shown, if the number of protrusions 12 on a target door panel is greater than or equal to three, the spacing between any two adjacent protrusions 12 on the same door panel 141 can be the same or different. For example, as... Figure 3 and Figure 18 As shown, Figure 3 and Figure 18 When the target door panel is the first door panel 141a, two protrusions 12 can be provided on the target door panel, and the two protrusions 12 are located at both ends of the axis of the rotating shaft assembly 14. One of the protrusions 12 can be provided in the area near the top of the flexible display screen in the target door panel, and the other protrusion 12 can be provided in the area near the bottom of the flexible display screen in the target door panel. This setting method can save the material cost of the protrusions 12.

[0096] Optionally, in any of the above embodiments, for any target frame with a protrusion 12, the number of protrusions 12 on the side of the target frame facing the flexible display screen 11 can be one or more. If the number of protrusions 12 on the target frame is one, then the protrusion 12 can be continuously laid along the axial direction Y at any position on the side of the target frame facing the flexible display screen 11; or, the protrusion 12 can be disposed in the area of ​​the target frame near the hinge assembly 14. For example, in a one-fold electronic device, if the first frame 13a is the target frame, the protrusion 12 can be disposed in the area of ​​the first frame 13a near the first door panel 141a in the hinge assembly 14; in a two-fold electronic device, if the second frame 13b is the target frame, the protrusion 12 can be disposed in the area of ​​the second frame 13b near the second door panel 141b of the first hinge assembly, or in the area of ​​the second frame 13b near the fifth door panel 141e of the second hinge assembly.

[0097] When there are multiple protrusions 12 on the target frame, these protrusions 12 can be randomly positioned at different locations on the target frame. Alternatively, the multiple protrusions 12 can be arranged along the Y-axis on the target frame. Or, some of the protrusions 12 can be located in the area near the top of the flexible display screen within the target frame, while others can be located in the area near the bottom of the flexible display screen within the target frame, for example... Figure 18 As shown, two protrusions 12 are provided in the first middle frame 13a, one protrusion 12 is located in the top region of the first middle frame 13a, and the other protrusion 13 is located in the bottom region of the first middle frame 13a; three protrusions 12 are arranged in the top region of the second middle frame 13b along the first direction X, and three protrusions 12 are arranged in the bottom region of the second middle frame 13b along the first direction X. Alternatively, at least one of the protrusions 12 is located in the region of the target middle frame near the hinge assembly 14, for example, in a folding electronic device, such as... Figure 9 As shown, in the area of ​​the second door panel 141b near the pivot assembly 14 in the second middle frame 13b, a plurality of protrusions 12 are arranged in the Y-axis direction. In the case that the first pivot assembly and the second pivot assembly are respectively provided on the left and right sides of the second middle frame 13b, at least one protrusion 12 can be provided in the area of ​​the second middle frame 13b near the first pivot assembly, and at least one protrusion 12 can be provided in the area of ​​the second middle frame 13b near the second pivot assembly, which can prevent the area on the surface of the flexible display screen 11 corresponding to the second middle frame 13b from tilting left and right.

[0098] It should be noted that, generally, each mid-frame 13 in a foldable electronic device 10 is provided with mounting slots for installing chips, batteries, sensors, and other devices. Therefore, the positions of the protrusions 12 on each target mid-frame can avoid the positions of the mounting slots in the target mid-frame. Furthermore, each mid-frame 13 may also contain screws or other fasteners or parts; therefore, the positions of the protrusions 12 on each target mid-frame can avoid the positions of the fasteners and other parts in the target mid-frame.

[0099] Optionally, in any of the above embodiments of this application, for any protrusion 12 provided on each target door panel and each target frame, the protrusion 12 may be made of a material, and the material of the protrusion 12 may be a low-viscosity material. For example, the viscosity of the material of the protrusion 12 may be less than or equal to 30 centipoise seconds (cps). For example, the material of the protrusion 12 may be ultraviolet glue (UV) adhesive or light-curing adhesive.

[0100] Optionally, the protrusion 12 can also be made of various different materials. Specifically, the protrusion 12 may include a first sub-protrusion 121 and a second sub-protrusion 122 disposed around the first sub-protrusion 121, wherein the material of the first sub-protrusion 121 is different from the material of the second sub-protrusion 122. For example, as shown... Figure 9 and Figure 10 As shown, the second sub-protrusion 122 is a hollow cylindrical structure, and the hollow of the second sub-protrusion 122 is filled with the first sub-protrusion 121. The height of the side of the first sub-protrusion 121 facing the flexible display screen 11 in the second direction Z can be lower than or equal to the height of the side of the second sub-protrusion 122 facing the flexible display screen 11 in the second direction Z.

[0101] Optionally, the viscosity of the material of the first sub-protrusion 121 and the viscosity of the material of the second sub-protrusion 122 can both be less than or equal to 30 cps. For example, the material of the first sub-protrusion 121 can be a thermosetting adhesive or a soft adhesive, and the material of the second sub-protrusion 122 can be a UV-curable adhesive. Optionally, the softness of the first sub-protrusion 121 can be higher than that of the second sub-protrusion 122, and the material cost of the second sub-protrusion 122 can be higher than that of the first sub-protrusion 121.

[0102] Optionally, the entire protrusion 12 can have a structure that is narrower at the top and wider at the bottom, that is, the width of the first surface of the protrusion 12 facing the flexible display screen 11 can be smaller than the width of the second surface of the protrusion 12 facing away from the flexible display screen 11. Further, as... Figure 4 , Figure 7 , Figure 8 , Figure 12 as well as Figure 13As shown, the side of the protrusion 12 located between the first and second surfaces can be arc-shaped.

[0103] Optionally, such as Figure 6 As shown, the entire protrusion 12 can be a structure with the same width at the top and bottom, that is, the width of the first surface of the protrusion 12 facing the flexible display screen 11 can be equal to the width of the second surface of the protrusion 12 facing away from the flexible display screen 11.

[0104] The shape of the first surface of the protrusion 12 can be circular, elliptical, annular, rectangular, squarish-circular, or other shapes, with the annular shape including circular rings and others. Figure 9 The square ring shown. The shape of the second surface of the protrusion 12 may be the same as or different from the shape of the first surface. The shapes of the first and second surfaces of the protrusions 12 provided on different components may be the same or different. The shapes of the first and second surfaces of multiple protrusions 12 provided on the same target frame or the same target door panel may be the same or different. This application does not make specific limitations in this regard.

[0105] Optionally, the width r of the first surface of the protrusion 12 satisfies the formula: 1mm ≤ r ≤ 2.3mm. It should be noted that in this embodiment, if the first surface is circular, its width can be the diameter of the circle. If the first surface is elliptical, its width can be the major or minor diameter of the ellipse. If the first surface is annular, its width is the outer diameter of the annulus. If the first surface is rectangular, its width can be the length or width of the rectangle. Correspondingly, if the second surface of the protrusion 12 is circular, its width can be the diameter of the circle. If the second surface is elliptical, its width can be the major or minor diameter of the ellipse. If the second surface is annular, its width is the outer diameter of the annulus. If the first surface is rectangular, its width can be the length or width of the rectangle.

[0106] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A foldable electronic device, characterized in that, include: At least one rotating shaft assembly (14); At least two middle frames (13) are arranged sequentially along a first direction, and each pair of adjacent middle frames (13) can be foldably connected by a pivot assembly (14); A flexible display screen (11) is disposed on the same side of the at least two middle frames (13) and the at least one pivot assembly (14). The flexible display screen (11) can be folded or unfolded along the axial direction of the pivot assembly (14), and the axial direction is perpendicular to the first direction. At least one of the pivot assembly (14) and / or at least one of the middle frame (13) are provided with a protrusion (12) on the side facing the flexible display screen (11). When the flexible display screen (11) is in the unfolded state, the protrusion (12) is used to support the flexible display screen (11) so that the surface of the flexible display screen (11) is basically flat.

2. The foldable electronic device according to claim 1, characterized in that, Each of the pivot assemblies (14) includes at least two foldably connected door panels (141), at least one of the target door panels in the pivot assembly (14) has its side facing the flexible display screen (11) lower than the first reference plane, and each of the target door panels has the protrusion (12) on its side facing the flexible display screen (11), and the target door panel is any one of the door panels (141) in the at least one pivot assembly (14); The first reference plane is the horizontal plane containing the highest surface in the second direction among the side of the door panel (141) of the at least one pivot assembly (14) other than the at least one target door panel facing the flexible display screen (11) and the side of the at least two middle frames (13) facing the flexible display screen (11), the second direction being perpendicular to the first direction and perpendicular to the axis direction.

3. The foldable electronic device according to claim 2, characterized in that, The protrusion (12) provided on the target door panel is located at both ends of the axis of the pivot assembly (14).

4. The foldable electronic device according to claim 2 or 3, characterized in that, The thickness of the protrusion (12) on the target door panel is equal to or substantially equal to the distance between the side of the target door panel facing the flexible display screen (11) and the first reference surface.

5. The foldable electronic device according to any one of claims 1 to 4, characterized in that, At least one of the at least two middle frames (13) has a side facing the flexible display screen (11) that is lower than the second reference plane. Each of the target middle frames has a protrusion (12) on its side facing the flexible display screen (11). The target middle frame is any one of the at least two middle frames (13). The second reference plane is the horizontal plane containing the highest surface in the second direction among the sides of the at least two middle frames (13) other than the at least one target middle frame facing the flexible display screen (11) and the side of the door panel (141) in the at least one pivot assembly (14) facing the flexible display screen (11), the second direction being perpendicular to the first direction and perpendicular to the axis direction.

6. The foldable electronic device according to claim 5, characterized in that, The thickness of the protrusion (12) provided on the target frame is equal to or substantially equal to the distance between the side of the target frame facing the flexible display screen (11) and the second reference surface.

7. The foldable electronic device according to claim 5 or 6, characterized in that, The protrusion (12) provided on the target frame is located in the area of ​​the target frame near the pivot assembly (14).

8. The foldable electronic device according to any one of claims 5 to 7, characterized in that, The protrusion (12) provided on the target frame is located in the area near the top of the flexible display screen (11) and the area near the bottom of the flexible display screen (11) in the target frame.

9. The foldable electronic device according to any one of claims 1 to 8, characterized in that, The shape of the protrusion (15) facing the first surface of the flexible display screen (11) is circular, elliptical, annular, or rectangular.

10. The foldable electronic device according to any one of claims 1 to 9, characterized in that, The protrusion (12) includes a first sub-protrusion (121) and a second sub-protrusion (122) disposed around the first sub-protrusion (121), wherein the material of the first sub-protrusion (121) is different from the material of the second sub-protrusion (122).

11. The foldable electronic device according to any one of claims 1 to 10, characterized in that, The viscosity of the material of the protrusion (12) is less than or equal to 30 cps.

12. The foldable electronic device according to any one of claims 1 to 11, characterized in that, The width r of the protrusion (12) facing the first surface of the flexible display screen (11) satisfies the formula: 1mm≤r≤2.3mm.

13. The foldable electronic device according to any one of claims 1 to 12, characterized in that, The width of the protrusion (12) facing the first surface of the flexible display screen (11) is less than or equal to the width of the protrusion (12) facing away from the flexible display screen (11).

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