Flexible glass, flexible display, and foldable electronic device

Abstract

The application relates to a flexible glass, a flexible screen and a foldable electronic device, which comprise a first supporting part, a second supporting part and a bendable part connected between the first supporting part and the second supporting part, the thicknesses of the first supporting part and the second supporting part are all greater than the thickness of the bendable part, the bendable part has a plurality of subparts with different thicknesses, the thickness of the subpart close to the middle of the bendable part is smaller than the thickness of the subpart far from the middle of the bendable part. The flexible glass, the flexible screen and the foldable electronic device of the application, the bendable part of the flexible glass comprises a plurality of subparts with different thicknesses, the thickness of the subpart close to the middle of the bendable part is smaller than the thickness of the subpart far from the middle of the bendable part, so that the rigidity of the connecting position of the bendable part with the first supporting part and the second supporting part and the bending performance at the bendable part are considered, when the flexible glass is bent at the position corresponding to the bendable part, the bending performance of the plurality of subparts of the bendable part is improved and the wrinkle deformation is reduced, and then the probability of the occurrence of the crease is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, in particular to a flexible glass, a flexible screen and a foldable electronic device. BACKGROUND

[0002] The foldable electronic device can be folded for use, further improving portability and gaining favor of consumers. The foldable electronic device needs to be equipped with a rotating shaft mechanism to meet the folding use requirement.

[0003] In the related art, the flexible screen of the foldable electronic device usually uses flexible glass as a protective glass to adapt to the folding performance. The flexible glass in the industry at present is mainly ultra-thin glass with equal thickness. The strength of this form of glass is low, and the failure rate is high. Thickening the thickness of the flexible glass can enhance the strength, but also increases the probability of creases. Even if a water drop screen, i.e. the bending part of the flexible screen in the folded state is curved in the shape of a water drop, it is still inevitable to produce creases at the bending position, which brings adverse effects on the appearance and reliability of the flexible screen. SUMMARY

[0004] The present application provides a flexible glass, a flexible screen and a foldable electronic device to solve the technical problem of how to balance the strength and bending performance while reducing the probability of creases.

[0005] In one aspect, the present application provides a flexible glass, comprising a first support part, a second support part and a bendable part connected between the first support part and the second support part, the thickness of the first support part and the second support part is greater than the thickness of the bendable part, the bendable part has a plurality of unequal thickness subparts, the thickness of the subpart close to the middle of the bendable part is less than the thickness of the subpart away from the middle of the bendable part.

[0006] In another aspect, the present application provides a flexible screen, comprising a flexible display panel and a flexible glass as described above, the flexible display panel has a light emitting surface, the flexible glass is connected with the flexible display panel and covers the light emitting surface.

[0007] The present application provides a foldable electronic device, comprising a rotating shaft mechanism and a flexible screen as described above, the rotating shaft mechanism is connected with the flexible screen, and the rotating shaft mechanism is opposite to the position of the bendable part of the flexible glass of the flexible screen, the rotating shaft mechanism is used to flatten or fold the position corresponding to the bendable part of the flexible screen when rotating.

[0008] The flexible glass, the flexible screen and the foldable electronic device provided by the present application, the flexible glass comprises a first support part, a second support part and a bendable part connected between the first support part and the second support part, and the thicknesses of the first support part and the second support part are both greater than the thickness of the bendable part, so that good bending performance can be obtained at the bendable part. The first support part and the second support part are thicker than the bendable part, thereby improving the support strength and reducing the failure probability of the flexible glass. Since the bendable part comprises a plurality of sub-parts with different thicknesses, the thickness of the sub-part close to the middle of the bendable part is less than the thickness of the sub-part far from the middle of the bendable part, thereby taking into account the rigidity of the connection position of the bendable part with the first support part and the second support part and the bending performance at the bendable part, so that when the flexible glass is bent at the position of the bendable part, the plurality of sub-parts of the bendable part improve the bending performance and reduce the wrinkle deformation, thereby reducing the probability of occurrence of the crease. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0010] Figure 1 The structural schematic diagram of the display screen provided by an embodiment.

[0011] Figure 2 The structural schematic diagram of the display screen provided by an embodiment along the I-I line in Figure 1 .

[0012] Figure 3 The structural schematic diagram of the display screen provided by an embodiment in a folded state.

[0013] Figure 4 The structural schematic diagram of the flexible glass of the display screen provided by an embodiment, and the vertical dashed line in the figure schematically separates a plurality of sub-parts of the bendable part.

[0014] Figure 5 The structural schematic diagram of the flexible glass of the display screen provided by another embodiment.

[0015] Figure 6 The structural schematic diagram of the flexible glass of the display screen provided by still another embodiment.

[0016] Figure 7 The schematic diagram of the foldable electronic device provided by an embodiment in a flat state.

[0017] Figure 8Another state of the folding electronic device according to an embodiment is shown.

[0018] Figure 9 A plan view of the folding electronic device according to an embodiment is shown, with the dotted line structure showing the installation position of the rotation shaft mechanism.

[0019] Figure 10 A cross-sectional structure view along the line II-II in Figure 9

[0020] Figure 11 Figure 10 A structure view of the folding electronic device in the folded state is shown.

[0021] Figure 12 A structure view of the folding electronic device in the folded state according to another embodiment is shown.

[0022] Figure 13 A structure view of the folding electronic device in the unfolded state according to another embodiment is shown.

[0023] Figure 14 Figure 13 A structure view of the folding electronic device in the folded state is shown.

[0024] Figure 15 A structure view of the folding electronic device in the folded state according to another embodiment is shown.

[0025] Figure 16 A structure view of the folding electronic device according to an embodiment, showing the installation position of the first traction member and the second traction member relative to the buffer pad.

[0026] Figure 17 A structure view of the first traction member of the folding electronic device according to an embodiment is shown.

[0027] Figure 18 A structure view of the first traction member at the circle A is shown. Figure 17

[0028] Reference signs:

[0029] ​​​​100, folding electronic device; 100a, first connecting piece; 100b, second connecting piece; 10, middle frame assembly; 12, first shell; 12a, first structural piece; 14, second shell; 14a, second structural piece; 20, flexible screen; 20a, bendable part; 20b, first connecting part; 20c, second connecting part; 20d, third connecting part; 20e, fourth connecting part; 21, flexible display panel; 21a, light exit surface; 22, flexible glass; 221, first support part; 222, second support part; 223, subpart; 224, groove; 30, rotation shaft mechanism; 31, middle plate; 31a, arc-shaped slot; 31b, sink slot; 32, first support piece; 33, second support piece; 40, traction assembly; 41, first traction piece; 41a, first perforation; 411, traction base material; 412, traction film; 413, adhesive piece; 42, second traction piece; 42a, second perforation; 50, buffer pad; 60, support sheet; 60a, first adhesive part; 60b, second adhesive part; Z-Z, bending axis. DETAILED DESCRIPTION

[0030] For the purposes of this application, a more complete understanding of the application can be obtained by reference to the following description in connection with the associated drawings. The preferred embodiments of the application are illustrated in the drawings. However, the application can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0031] As used herein, "folding electronic device" refers to, but is not limited to, a device capable of receiving and / or transmitting communication signals via any one or more of the following connection means: (1) via a wired connection means, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; (2) via a wireless interface means, such as a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.

[0032] As an electronic device, a folding electronic device can be referred to as a "mobile terminal" which is set to communicate through a wireless interface. Examples of the mobile terminal include, but are not limited to, the following electronic devices: (1) a satellite phone or a cellular phone; (2) a Personal Communications System (PCS) terminal which can combine a cellular radio telephone with data processing, facsimile, and data communication capabilities; (3) a radio telephone, a pager, an Internet / Intranet access, a Web browser, a notepad, a calendar, a Personal Digital Assistant (PDA) equipped with a Global Positioning System (GPS) receiver; (4) a conventional laptop and / or palm-top receiver; (5) a conventional laptop and / or palm-top radio telephone transceiver, and the like.

[0033] In combination Figure 1 and Figure 2 As shown in FIG. 1, an embodiment of the present application provides a flexible screen 20 including a flexible display panel 21 and a flexible glass 22. The flexible display panel 21 has a light emitting surface 21a, which refers to a surface of the flexible display panel 21 for emitting light for display. The flexible glass 22 is connected to the flexible display panel 21 and covers the light emitting surface 21a, thereby protecting the flexible display panel 21.

[0034] Based on the fact that the flexible screen 20 can meet the folding requirement, the positions of the flexible display panel 21 and the flexible glass 22 which are adapted to the folding of the flexible screen 20 are all referred to as "bendable portions 20a", that is, the flexible display panel 21 and the flexible glass 22 both have corresponding bendable portions 20a.

[0035] The flexible glass 22 includes a first support portion 221 and a second support portion 222 which are connected. In the flexible glass 22, the bendable portion 20a of the flexible glass 22 is connected between the first support portion 221 and the second support portion 222, and the thicknesses of the first support portion 221 and the second support portion 222 are both greater than the thickness of the bendable portion 20a, so that good bending performance can be obtained at the bendable portion 20a. Accordingly, the first support portion 221 and the second support portion 222 are thicker than the bendable portion 20a, thereby improving the support strength to reduce the probability of failure of the flexible glass 22, so as to better protect the flexible display panel 21.

[0036] It can be understood that in combination Figure 3As shown, when the first support part 221 and the second support part 222 are bent relative to each other at the bendable part 20a, the corresponding position of the bendable part 20a of the flexible display panel 21 will also bend correspondingly, so as to realize the bending of the flexible screen 20 as a whole at the position of the corresponding bendable part 20a. Correspondingly, when the flexible screen 20 is unfolded, the bendable part 20a is unfolded and located between the first support part 221 and the second support part 222.

[0037] In combination Figure 4 As shown, the bendable part 20a includes a plurality of sub-parts 223 with different thicknesses, and the thickness of the sub-part 223 close to the middle of the bendable part 20a is smaller than the thickness of the sub-part 223 away from the middle of the bendable part 20a, so as to balance the rigidity of the connection position of the bendable part 20a with the first support part 221 and the second support part 222 and the bending performance at the bendable part 20a, so that when the flexible glass 22 bends at the position of the corresponding bendable part 20a, the plurality of sub-parts 223 of the bendable part 20a improve the bending performance and reduce the wrinkle deformation, thereby reducing the probability of the occurrence of the crease.

[0038] Further, the plurality of sub-parts 223 of the bendable part 20a not only have different thicknesses, but also the thicknesses of the positions of the sub-parts 223 can be set to be different. Specifically, for the sub-part 223, the farther away from the middle position of the bendable part 20a, the greater the thickness of the sub-part 223. In this way, the plurality of sub-parts 223 of the bendable part 20a present a gradient gradient form, so as to improve the bending performance while reducing the probability of the occurrence of the inconsistent brightness of light at the connection position of the sub-part 223, so as to maintain the good display effect of the flexible screen 20.

[0039] In the present application, the thickness of the structure refers to the size of the structure in the thickness direction of the flexible screen 20. For the structure with equal thickness, the thickness is the distance from one side surface to the other side surface. For the structure with different thicknesses, the thickness is the average thickness obtained by averaging the thicknesses measured at the positions of the structure.

[0040] In order to facilitate understanding, the thicknesses of the first support part 221 and the second support part 222 are greater than the thickness of the bendable part 20a, and the flexible glass 22 is described from the overall shape. It can be understood that the flexible glass 22 is a soft and bendable ultra-thin glass, and the overall thickness is usually in microns. In combination Figure 1 and Figure 2As shown, one side surface of the flexible glass 22 is provided with a groove 224, so that the flexible glass 22 has opposite thickened regions and thinned regions in thickness. The groove 224 corresponds to the thinned region and extends along a straight line, so that the thickened regions are separated into a first support portion 221 and a second support portion 222. The thinned region forms a bendable portion 20a between the first support portion 221 and the second support portion 222. In this way, for the flexible glass 22, the first support portion 221 and the second support portion 222 corresponding to the thickened regions are provided with thickened structures, so that the glass has high strength and is not easy to break, so as to adapt to the protection needs of the flexible display panel 21. Correspondingly, the bendable portion 20a corresponding to the thinned region is provided with a thinned design, so as to reduce the rigidity and facilitate the improvement of the bending performance. Since the bendable portion 20a has a plurality of sub-regions 223 with different thicknesses, the thickness of the sub-region 223 close to the middle of the bendable portion 20a is smaller than the thickness of the sub-region 223 away from the middle of the bendable portion 20a. In this way, the bendable portion 20a has sufficient strength at the positions adjacent to the first support portion 221 and the second support portion 222, so as to reduce the probability of breakage, and at the same time, since the thickness of the sub-region 223 close to the middle of the bendable portion 20a is smaller than the thickness of the sub-regions 223 on both sides, the bendable portion 20a is easy to bend and the wrinkle deformation is reduced, so as to reduce the probability of crease.

[0041] The first support portion 221 and the second support portion 222 are both equal-thickness structures, and the thickness of the first support portion 221 is equal to the thickness of the second support portion 222. In this way, the flexible glass 22 can realize uniform support of the flexible display panel 21, and avoid that the first support portion 221 and the second support portion 222 generate local stress on the flexible display panel 21 due to different thicknesses, so as to facilitate the improvement of the service life of the display screen.

[0042] Further, in combination with the above-mentioned embodiments, the first support portion 221 and the second support portion 222 can be equal-thickness structures. Figure 4 As shown, the thickness of the sub-region 223 in the middle of the bendable portion 20a is d, and the thickness of the first support portion 221 is D, and 1 / 4≤d / D≤3 / 4. It is found through bending test of the flexible glass 22 that the flexible glass 22 of this embodiment can undergo bending for millions of times without crease.

[0043] The thickness of the first support portion 221 and the second support portion 222 can be set according to the configuration needs of the flexible screen 20. In some embodiments, the thickness D of the first support portion 221 is in the range of 120 μm to 200 μm, for example, D is 120 μm, 150 μm, 180 μm or 200 μm.

[0044] It should be noted that the number of sub portions 223 in the bendable portion 20a can be 5, 6 or more. The more the number of sub portions 223, the finer the unequal thickness region of the bendable portion 20a can be divided, so that the shape of the bendable portion 20a during bending is closer to a circular arc shape, thereby more conducive to reducing the probability of creases in the bendable portion 20a. For example, in combination with Figure 4 As shown, the bendable portion 20a includes 5 sub portions 223, and 2 sub portions 223 are arranged on both sides of the middle sub portion 223. For another example, in combination with Figure 5 The bendable portion 20a includes 7 sub portions 223, and 3 sub portions 223 are arranged on both sides of the middle sub portion 223. Of course, in some embodiments, the bendable portion 20a can also include other numbers of sub portions 223, and the number of sub portions 223 can be odd or even, which is not limited here.

[0045] As shown in Figure 5 The surfaces of the plurality of sub portions 223 for forming the groove 224 are smoothly transitioned in sequence, so that there is no obvious ridge line between adjacent sub portions 223. In this way, when the flexible display panel 21 displays light, the light is not easy to appear obvious bright spots after passing through the position of the bendable portion 20a, so as to maintain the good display effect of the flexible screen 20. At this time, through this setting, when external light irradiates the bendable portion 20a, the sub portions 223 of the bendable portion 20a are also not easy to produce striped phenomenon of different brightness, so as to maintain the overall appearance quality of the flexible screen 20.

[0046] It should be noted that the bendable portion 20a is formed by the thinning setting position of the groove 224 on the flexible glass 22, so that the surface of the bendable portion 20a is recessed to form the groove 224. Specifically, the plurality of sub portions 223 form the groove 224 due to the different thicknesses, and based on this, the surfaces of the plurality of sub portions 223 for forming the groove 224 refer to the surfaces of the groove walls of the sub portions 223 forming the groove 224.

[0047] Continuing to combine Figure 5As shown, the sub-section 223 located in the middle of the bendable portion 20a is of an equal thickness structure, and the surfaces of the other sub-sections 223 forming the grooves 224 are all wedge-shaped slopes. In this embodiment, the slope of the wedge-shaped slope of the sub-section 223 closer to the middle of the bendable portion 20a is smaller than the slope of the wedge-shaped slope of the sub-section 223 farther from the middle of the bendable portion 20a, so that when the light passes through the bendable portion 20a, local bright spots are not easily generated, thereby being conducive to maintaining the overall display effect of the flexible screen 20. In some embodiments, the farther the sub-section 223 is from the middle of the bendable portion 20a, the greater the slope of the surface of the sub-section 223 for forming the groove 224, so that the plurality of sub-sections 223 of the bendable portion 20a exhibit a gradient gradient form, so as to facilitate improving the bending performance while reducing the probability of light appearing with inconsistent brightness at the connection position of the sub-section 223, so as to maintain the good display effect of the flexible screen 20.

[0048] Further, the inclination angle of the wedge-shaped slope closest to the middle of the bendable portion 20a is α, and the value range of α is 0.1°≤α≤2°, such as 0.1°, 0.3°, 0.5°, 0.8°, 0.9°, 1.1°, 1.6°, 1.8° or 2°. Through the display effect and appearance test of the flexible glass 22 in the flexible screen 20, it is found that when the value range of the inclination angle α of the wedge-shaped slope closest to the middle of the bendable portion 20a is set to 0.1°≤α≤2°, the display effect of the flexible screen 20 of the present application is no different from that of the flexible screen 20 with the flexible glass 22 of equal thickness, and it is also difficult to observe different reflections from the corresponding recessed positions of the flexible screen 20 of the present application in appearance. Therefore, the flexible screen 20 of the present application improves the bending performance of the flexible screen 20 and reduces the probability of generating folds while maintaining stable performance in all aspects.

[0049] Continue to combine Figure 5As shown, in some embodiments, the width of the groove 224 is W, the width of the sub-portion 223 located in the middle of the bendable portion 20a is w, and 1 / 2≤w / W≤3 / 4. In this way, the width of the sub-portion 223 located in the middle of the groove 224 accounts for most of the width, so as to improve the bending performance of the bendable portion 20a. It should be noted that, in some embodiments, the width W of the groove 224 can be 3mm-8mm, for example, the width W of the groove 224 is 3mm, 4mm, 5mm, 6mm, 7mm or 8mm. In this way, it can not only ensure sufficient slot width to improve the bending performance of the flexible glass 22, but also set enough sub-portion 223 to reduce the probability of obvious light spots when light passes through different sub-portions 223; at the same time, the width of the groove 224 will not be too large to increase the processing cost of the slot, and a large width of the thickened area is reserved to improve the overall strength of the flexible glass 22 and reduce the failure probability. It should be particularly noted that the glass failure is for the protection effect of the flexible glass 22 on the flexible display panel 21. For example, if the flexible glass 22 is too thin and too soft, the strength cannot meet the protection needs of the flexible display panel 21, and if the flexible glass 22 is too thick, it is easy to break when bent, which will also affect its protection effect on the flexible display panel 21. Therefore, in this application, the flexible glass 22 as a protective glass for the flexible display panel 21 should be within the thickness range that can adapt to the protection of the flexible display panel 21, and the structure of the bendable portion 20a is set to balance the strength and bending performance while reducing the probability of creases.

[0050] Further, the width of the sub-portion 223 close to the middle position of the bendable portion 20a is greater than the width of the sub-portion 223 far from the middle position of the bendable portion 20a. Since the thickness of the sub-portion 223 close to the middle of the bendable portion 20a is smaller than the thickness of the sub-portion 223 far from the middle of the bendable portion 20a, by setting the thickness and width of the sub-portion 223, the width of the sub-portion 223 with thicker thickness is narrower, so that the middle position of the bendable portion 20a has better bending performance than the two side positions, and the positions close to the first support portion 221 and the second support portion 222 have sufficient strength, so that the flexible glass 22 can better play the protection performance on the flexible display panel 21 while taking into account the bending performance and reducing the probability of creases.

[0051] It should be noted that, in some embodiments, the closer the sub-portion 223 to the middle position of the bendable portion 20a, the greater the width of the sub-portion 223. Through this structural arrangement, the sub-portions 223 of the bendable portion 20a can present a gradient change, so as to balance the bending performance of the bendable portion 20a while maintaining good display effect of the flexible screen 20.

[0052] In some embodiments, the surfaces of the plurality of sub-sections 223 for forming the grooves 224 are all concave curved surfaces.

[0053] In some embodiments, the surfaces of the plurality of sub-sections 223 for forming the grooves 224 are all concave curved surfaces. Figure 6 As shown, the sub-section 223 in the middle of the bendable section 20a is of an equal thickness structure, and the surfaces of the other sub-sections 223 for forming the grooves 224 are all concave curved surfaces. By arranging the concave curved surfaces, the transition between the plurality of sub-sections 223 can be smoother, thereby facilitating the bending of the bendable section 20a without causing creases. Further, the curvature of the sub-section 223 in the middle of the bendable section 20a is smaller than the curvature of the sub-sections 223 on the two sides, so as to facilitate maintaining the connection strength of the bendable section 20a and the first support section 221 and the second support section 222 on the two sides, and reducing the failure probability of the flexible glass 22.

[0054] Referring to Figure 7 and Figure 8 As shown, the sub-section 223 in the middle of the bendable section 20a is of an equal thickness structure, and the surfaces of the other sub-sections 223 for forming the grooves 224 are all concave curved surfaces. By arranging the concave curved surfaces, the transition between the plurality of sub-sections 223 can be smoother, thereby facilitating the bending of the bendable section 20a without causing creases. Further, the curvature of the sub-section 223 in the middle of the bendable section 20a is smaller than the curvature of the sub-sections 223 on the two sides, so as to facilitate maintaining the connection strength of the bendable section 20a and the first support section 221 and the second support section 222 on the two sides, and reducing the failure probability of the flexible glass 22.

[0055] As shown, the sub-section 223 in the middle of the bendable section 20a is of an equal thickness structure, and the surfaces of the other sub-sections 223 for forming the grooves 224 are all concave curved surfaces. By arranging the concave curved surfaces, the transition between the plurality of sub-sections 223 can be smoother, thereby facilitating the bending of the bendable section 20a without causing creases. Further, the curvature of the sub-section 223 in the middle of the bendable section 20a is smaller than the curvature of the sub-sections 223 on the two sides, so as to facilitate maintaining the connection strength of the bendable section 20a and the first support section 221 and the second support section 222 on the two sides, and reducing the failure probability of the flexible glass 22. Figure 9 to Figure 11 As shown, for the convenience of description, when the foldable electronic device 100 is folded for use, the axis around which the flexible screen 20 is bent at the position of the bendable section 20a is referred to as a "bending axis Z-Z", i.e., the flexible screen 20 can be bent around the bending axis Z-Z. Hereinafter, the "bending axis of the flexible screen 20" and the "bending axis of the bendable section 20a" both refer to the bending axis Z-Z. Understandably, the hinge mechanism 30 is opposite to the bendable section 20a, and the hinge axis of the hinge mechanism 30 is parallel to the bending axis Z-Z of the bendable section 20a. When the hinge mechanism 30 rotates, the position of the corresponding bendable section 20a of the flexible screen 20 is flattened or folded.

[0056] For the convenience of understanding, the part of the flexible screen 20 opposite to the folding part is referred to as a "first screen body" and a "second screen body" respectively. Understandably, when the flexible screen 20 is flattened, the first screen body and the second screen body are located on the opposite sides of the bendable section 20a correspondingly, and thus the first screen body and the second screen body are folded on each other during the folding process of the flexible screen 20 at the position of the bendable section 20a.

[0057] The flexible screen 20 comprises a first connecting portion 20b and a second connecting portion 20c. The first connecting portion 20b is arranged on the side of the first screen body away from the flexible glass, and the second connecting portion 20c is arranged on the side of the second screen body away from the flexible glass. The hinge mechanism 30 is connected to the first connecting portion 20b and the second connecting portion 20c. When the hinge mechanism 30 rotates, the hinge mechanism 30 drives the flexible screen 20 to move between the unfolded state and the folded state.

[0058] In combination Figure 10 and Figure 11 As shown in

[0059] It is to be noted that the bendable portion 20a is in the shape of a water drop in the folded state. For example, in some embodiments, the hinge mechanism 30 comprises a middle plate 31 and first and second support members 32 and 33 connected to the two sides of the middle plate 31. The first and second support members 32 and 33 are rotatable relative to the middle plate 31 to unfold or fold the bendable portion 20a. In the folded state, the first and second support members 32 and 33 and the middle plate 31 form a receiving space, and the bendable portion 20a is folded in the receiving space. In this embodiment, the first and second support members 32 and 33 press the flexible screen 20 to make the bendable portion 20a in the shape of a water drop.

[0060] In the unfolded state, the first and second support members 32 and 33 support the flexible screen 20, so that the flexible screen 20 has good flatness to obtain good display effect.

[0061] Again referring to Figure 7 and Figure 8As shown, the folding electronic device 100 comprises a middle frame assembly 10, the middle frame assembly 10 comprises a first shell 12 and a second shell 14, and a rotating shaft mechanism 30 is connected between the first shell 12 and the second shell 14, so that the first shell 12 and the second shell 14 can rotate relative to each other. It can be understood that the flexible screen 20 is connected with the first shell 12 and the second shell 14, and the rotating shaft mechanism 30 covers the rotating shaft mechanism 30 at the position corresponding to the bendable part 20a of the folding flexible screen 20, so as to maintain the overall aesthetic appearance of the folding electronic device 100. The first shell 12 and the flexible screen 20 can be connected through a first structural member 12a, and the second shell 14 and the flexible screen 20 can be connected through a second structural member 14a. The first structural member 12a and the second structural member 14a can be a glue layer or a screw, which is not limited here.

[0062] The middle frame assembly 10 forms a receiving cavity (not shown in the figure), and the folding electronic device 100 can further comprise a circuit board (not shown in the figure) and a battery (not shown in the figure), both of which can be arranged in the receiving cavity of the middle frame assembly 10. The circuit board can integrate the processor, the power management module, the storage unit and the baseband chip of the folding electronic device 100. The flexible screen 20 is in communication connection with the processor, and the battery can supply power to the electronic elements on the flexible screen 20 and the circuit board. In some embodiments, the folding electronic device 100 can further comprise a camera module (not shown in the figure), the camera module is in communication connection with the circuit board, and the battery can supply power to the camera module. It can be understood that the folding electronic device 100 of the embodiments of the present application includes but is not limited to terminal devices such as mobile phones, tablet computers and other portable folding electronic devices 100.

[0063] In combination Figure 10 And Figure 11 As shown, the traction assembly 40 comprises a first traction member 41 and a second traction member 42. One end of the first traction member 41 is connected with the first support member 32, and the other end is connected with the flexible screen 20. One end of the second traction member 42 is connected with the second support member 33, and the other end is connected with the flexible screen 20. In this embodiment, the first traction member 41 and the second traction member 42 respectively pull the parts on both sides of the bendable part 20a corresponding to the bending axis Z-Z, which not only can change the circular contour of the bendable part 20a, but also can easily balance the stress on both sides of the bendable part 20a, so that the bendable part 20a is not easy to deviate to one side of the first support member 32 and the second support member 33 due to uneven stress.

[0064] Further, referring to Figure 11As shown, based on the water-drop shape of the bendable portion 20a in the folded state, the action point of the pulling force applied by the traction assembly 40 (e.g., the first traction member 41 and the second traction member 42) on the bendable portion 20a is located at the lower half of the water-drop shape, so that the pulling effect of the first traction member 41 and the second traction member 42 on the bendable portion 20a is better. Specifically, the position where the first traction member 41 is connected to the flexible screen 20 corresponds to the side of the widest part MW of the water-drop shape of the bendable portion 20a in the folded state, which is close to the bending vertex G. At this time, in the case that the folding electronic device 100 is folded upwards in the vertical plane, the position where the first traction member 41 is connected to the flexible screen 20 corresponds to the lower part of the widest part MW of the water-drop shape of the bendable portion 20a, and at this time, the bendable portion 20a can be better pulled by the first traction member 41, so that the bendable portion 20a tends to be more circularly curved. It should be noted that the widest part MW of the water-drop shape refers to the position corresponding to the maximum dimension of the thickness direction of the folding electronic device 100 in the folded state of the bendable portion 20a; correspondingly, the bending vertex G refers to the position corresponding to the minimum dimension of the thickness direction of the folding electronic device 100 in the folded state of the bendable portion 20a, i.e., the position of the maximum curvature of the bendable portion 20a.

[0065] The position where the second traction member 42 is connected to the flexible screen 20 is located at the side of the widest part MW of the water-drop shape of the bendable portion 20a in the folded state, which is close to the bending vertex G, so that the pulling effect of the second traction member 42 on the bendable portion 20a can be improved, and the bendable portion 20a tends to be more circularly curved. The flexible screen 20 is provided with a third connecting portion 20d, and the first traction member 41 is connected to the first connecting portion 20b and the third connecting portion 20d. In this way, during the folding of the bendable portion 20a, the first traction member 41 will be bent together, and since the first traction member 41 is located on the side of the bendable portion 20a facing the rotating shaft mechanism 30, the first traction member 41 will generate a mutual pulling force on the first connecting portion 20b and the third connecting portion 20d, so that the bendable portion 20a correspondingly deforms, so that the bendable portion 20a can be adjusted from a flat water-drop shape to be closer to a circular shape, so as to reduce the probability of creases occurring in the bendable portion 20a.

[0066] In this embodiment, the third connecting portion 20d is the connection position of the first traction member 41 to the flexible screen 20, and is also the action point of the pulling force generated by the first traction member 41 on the bendable portion 20a of the flexible screen 20. Therefore, the third connecting portion 20d can be arranged at the position where the flexible screen 20 is connected, which is located at the side of the widest part MW of the water-drop shape of the bendable portion 20a in the folded state, which is close to the bending vertex G, so as to further improve the pulling effect of the first traction member 41 on the bendable portion 20a, and the bendable portion 20a corresponding to the bendable portion 20a of the flexible screen 20 tends to be more circularly curved. In combination with the above Figure 10As shown, in this embodiment, the first traction member 41 is arranged to have a gap with the bendable portion 20a between the first connecting portion 20b and the third connecting portion 20d when the bendable portion 20a is in the flat state. This not only reduces the probability of the first traction member 41 contacting the bendable portion 20a during the bending process, but also reduces the contact stress between the first traction member 41 and the flexible screen 20 even if the first traction member 41 contacts the flexible screen 20 during the bending process, thereby reducing the probability of the flexible screen 20 being damaged.

[0067] Further, the gap between the first traction member 41 and the flexible screen 20 is less than or equal to 3 times the thickness of the first traction member 41 when the bendable portion 20a is in the flat state. In this gap range, the traction force of the first traction member 41 on the flexible screen 20 is appropriate, and the traction force of the first traction member 41 is not too large to easily pull off the flexible screen 20 or even damage the structure of the flexible screen 20. In this arrangement, the traction force of the first traction member 41 on the flexible screen 20 is not too small to cause the deformation of the bendable portion 20a to be not obvious.

[0068] The distance between the first connecting portion 20b and the third connecting portion 20d is 1 / 3-1 / 2 of the flat length of the flexible screen 20 corresponding to the bendable portion 20a when the bendable portion 20a is in the flat state. The part of the flexible screen 20 between the first connecting portion 20b and the third connecting portion 20d is the main deformation part under the action of the first traction member 41, and is arranged to be 1 / 3-1 / 2 of the flat length of the flexible screen 20 corresponding to the bendable portion 20a. This not only causes the position of the flexible screen 20 corresponding to the bendable portion 20a to have an obvious deformation amount, but also avoids the local part of the flexible screen 20 corresponding to the bendable portion 20a being damaged by excessive stress.

[0069] It should be noted that, in the present application, the flattened length of the bendable portion 20a is the length of the flexible screen 20 corresponding to the bendable portion 20a in the flattened state in the direction parallel to the first shell 12 and the second shell 14 of the foldable electronic device 100. Figure 10 The distance between the two end positions of the bendable portion 20a of the flexible screen 20 in the horizontal direction of the foldable electronic device 100 is shown. The two ends of the bendable portion 20a of the flexible screen 20 are connected to the first connecting portion 20b and the second connecting portion 20c, respectively. Therefore, the flattened length of the bendable portion 20a of the flexible screen 20 is the distance between the first connecting portion 20b and the second connecting portion 20c.

[0070] In some embodiments, the second traction member 42 is connected to the position of the bendable portion 20a of the flexible screen 20 in a similar manner as the first traction member 41. In combination with the above description of the first traction member 41, Figure 10 and Figure 11 As shown, the bendable portion 20a is provided with a fourth connecting portion 20e, the second traction member 42 is connected to the second connecting portion 20c and the fourth connecting portion 20e, and when the bendable portion 20a of the flexible screen 20 is in the flattened state, the second traction member 42 is arranged in a structural gap between the second connecting portion 20c and the fourth connecting portion 20e of the flexible screen 20. The benefits of this arrangement can be referred to the arrangement of the first traction member 41, which will not be described here. Accordingly, in this embodiment, when the bendable portion 20a of the flexible screen 20 is in the flattened state, the gap between the second traction member 42 and the flexible screen 20 is less than or equal to 3 times the thickness of the second traction member 42. The fourth connecting portion 20e serves as the connection position of the second traction member 42 and the flexible screen 20, and also as the force application point when the second traction member 42 pulls the bendable portion 20a of the flexible screen 20. Therefore, the position where the fourth connecting portion 20e is connected to the flexible screen 20 can be arranged on the side close to the bending vertex G of the widest part MW of the water drop shape of the bendable portion 20a in the folded state, further improving the pulling effect of the second traction member 42 on the bendable portion 20a, so that the bendable portion 20a tends to be more circularly curved.

[0071] In some embodiments, the distance between the second connecting portion 20c and the fourth connecting portion 20e of the bendable portion 20a in the flattened state is 1 / 3 to 1 / 2 of the flattened length of the bendable portion 20a of the flexible screen 20. In this embodiment, the part of the flexible screen 20 between the second connecting portion 20c and the fourth connecting portion 20e serves as the main deformation part under the action of the second traction member 42. By arranging it to be 1 / 3 to 1 / 2 of the flattened length of the bendable portion 20a of the flexible screen 20, not only can the bendable portion 20a of the flexible screen 20 be deformed significantly, but also the local stress on the bendable portion 20a of the flexible screen 20 can be avoided from being too large to cause damage.

[0072] Combination Figure 11 As shown, the first connecting portion 20b and the second connecting portion 20c are symmetrically arranged about a virtual plane, the first support member 32 and the second support member 33 are symmetrically arranged about a virtual plane, and the first traction member 41 and the second traction member 42 are symmetrically arranged about a virtual plane. The virtual plane is defined by the central symmetry plane of the bendable portion 20a in its folded state. The bendable portion 20a is symmetrical about the virtual plane in its folded state. In this embodiment, the symmetrical arrangement helps maintain the force balance on both sides of the foldable electronic device 100 corresponding to the folding position. Furthermore, this symmetrical structural arrangement can reduce structural complexity and facilitate assembly.

[0073] Combination Figure 10 and Figure 11 As shown, a clearance groove is provided on the middle plate 31, and the extension direction of the clearance groove is parallel to the bending axis ZZ of the bendable part 20a. When the bendable part 20a is in the folded state, the position of the bendable part 20a closest to the middle plate 31 is opposite to the clearance groove. In this way, the clearance groove can be used to create clearance, reducing the contact stress between the bendable part 20a and the middle plate 31 in the folded state.

[0074] The clearance groove includes an arc-shaped groove 31a and a recessed groove 31b located at the bottom of the arc-shaped groove 31a, the depth of the recessed groove 31b being less than or equal to the depth of the arc-shaped groove 31a. In this embodiment, the recessed groove 31b further improves the stress concentration of the bendable portion 20a in the folded state, making the bendable portion 20a less prone to stress concentration and damage.

[0075] In this application, the arc-shaped groove 31a refers to a clearance groove whose cross-section is arc-shaped. It should be noted that the arc-shaped groove 31a can also be omitted. For example, in conjunction with... Figure 12 As shown, the clearance groove on the middle plate 31 is a recessed groove 31b. In addition, the cross-sectional shape of the clearance groove can be arc-shaped or rectangular, and is not limited here.

[0076] A buffer pad 50 is provided on the side of the middle plate 31 facing the bendable portion 20a, and the buffer pad 50 covers part of the clearance groove. When the bendable portion 20a deforms by pressing against the buffer pad 50, part of the structure of the buffer pad 50 is accommodated in the clearance groove. In this embodiment, the buffer pad 50 further reduces the contact stress between the bendable portion 20a and the middle plate 31, thereby helping to reduce the probability of damage to the bendable portion 20a.

[0077] The cushion 50 can be one, or two or more. It should be noted that when the cushion 50 is two or more, the two or more cushions can be arranged in pairs on opposite sides of the clearance groove, so as to provide a cushioning protection effect on the bendable portion 20a. Meanwhile, even if the bendable portion 20a is in contact with the cushion 50 in the folded state, the cushion 50 can enter the clearance groove without damaging the bendable portion 20a. The two or more cushions arranged in pairs can be cut off by die cutting, and the two cushions on opposite sides of the clearance groove can have no obvious gap or a gap less than or equal to 1 mm.

[0078] In combination Figure 13 and Figure 14 As shown in FIGS. 1, 2 and 3, in some embodiments, the flexible screen 20 includes a support sheet 60 arranged corresponding to the bendable portion 20a, and the traction assembly 40 is connected to the support sheet 60, and when the bendable portion 20a is in the folded state, the traction assembly 40 pulls the bendable portion 20a by pulling the support sheet 60.

[0079] In the embodiments in which the flexible screen 20 includes the support sheet 60, the position of the support sheet 60 for connecting to the traction assembly 40 can define the third connecting portion 20d and the fourth connecting portion 20e, that is, in this embodiment, the third connecting portion 20d and the fourth connecting portion 20e can be located on the support sheet 60 of the flexible screen 20.

[0080] In this embodiment, when the bendable portion 20a is in the unfolded state, the support sheet 60 applies a tension to the bendable portion 20a towards the first connecting portion 20b and the second connecting portion 20c, so as to stretch the un-restored adhesive and film materials in the layer structure of the bendable portion 20a to improve the light and shadow of the flexible screen 20 and reduce the creases. Since the traction assembly 40 can pull the support sheet 60 to pull the bendable portion 20a, and the support sheet 60 itself has good bending performance, when the support sheet 60 pulls the bendable portion 20a, the support sheet 60 can uniformly apply a pulling force to the bendable portion 20a, so as to maintain the overall structural stability of the bendable portion 20a. In some embodiments, the elastic modulus of the support sheet 60 is greater than or equal to 100 Gpa, so that the support sheet 60 has good elasticity and can flatten the bendable portion 20a.

[0081] As shown in FIGS. 1, 2 and 3, in some embodiments, the flexible screen 20 includes a support sheet 60 arranged corresponding to the bendable portion 20a, and the traction assembly 40 is connected to the support sheet 60, and when the bendable portion 20a is in the folded state, the traction assembly 40 pulls the bendable portion 20a by pulling the support sheet 60. Figure 13As shown, the opposite ends of the support sheet 60 are respectively provided with a first adhesive portion 60a and a second adhesive portion 60b. The first adhesive portion 60a and the second adhesive portion 60b can be adhesive layers, so as to facilitate the adhesion of the support sheet 60 to the flexible screen 20. The connection mode between the support sheet 60 and the flexible screen 20 is not limited herein. For example, the first adhesive portion 60a and the second adhesive portion 60b for connecting the support sheet 60 to the flexible screen 20 can also be replaced by a first component and a second component for realizing screw connection or clamping connection, i.e., the first component and the second component respectively connect the two ends of the support sheet 60 to the flexible screen 20.

[0082] Further, the traction assembly 40 (such as the first traction member 41 and the second traction member 42) is connected to the side of the support sheet 60 away from the bendable portion 20a, and the position (such as the third connecting portion 20d and the fourth connecting portion 20e) at which the traction assembly 40 is connected to the support sheet 60 is located between the first component (such as the first adhesive portion 60a) and the second component (such as the second adhesive portion 60b), so that the traction assembly 40 can better pull the support sheet 60, and the support sheet 60 deforms together with the bendable portion 20a, so as to facilitate the bendable portion 20a to be more circularly bent.

[0083] As shown, Figure 14 The first traction member 41 and the first support member 32 can be connected to the same first connecting portion 20b. In combination with Figure 15 The first traction member 41 and the second support member 33 can be connected to different positions of the flexible screen 20. For example, the flexible screen 20 is provided with two or more first connecting portions 20b arranged at intervals, and the first traction member 41 and the second support member 33 are respectively connected to different first connecting portions 20b. Correspondingly, the second traction member 42 and the second support member 33 can be connected to the same second connecting portion 20c, or can be respectively connected to different second connecting portions 20c. The connection positions of the first traction member 41 and the second traction member 42 are not limited herein. As long as the pivot mechanism 30 drives the folding movement of the flexible screen 20 at the position corresponding to the bendable portion 20a, the pivot mechanism 30 can pull the bendable portion 20a through the first traction member 41 and the second traction member 42. For example, in combination with Figure 10 and Figure 16 The first traction member 41 can be provided with a first through hole 41a, and the foldable electronic device 100 comprises a first connecting member 100a penetrating through the first through hole 41a and connecting the first support member 32 to the first connecting portion 20b. The second traction member 42 can be provided with a second through hole 42a, and the foldable electronic device 100 comprises a second connecting member 100b penetrating through the second through hole 42a and connecting the second support member 33 to the second connecting portion 20c.

[0084] The first traction member 41 and the second traction member 42 can have the same structure or different structures. In some embodiments, the first traction member 41 and the second traction member 42 are combined into one traction member. Figure 17 and Figure 18 As shown in FIG. 1, the first traction member 41 includes a traction base material 411 and a traction film 412 connected to the traction base material 411. The traction base material 411 supports the traction film 412 and provides elastic return, and has sufficient rigidity. The traction base material 411 has an elastic modulus greater than or equal to 100 GPa. The traction film 412 has good flexibility to deform after being attached to the bendable portion 20a and to apply elastic pulling force to the bendable portion 20a in the bent state. The traction film 412 can have openings to improve its deformation capability. The traction film 412 has an elastic modulus of 5 GPa to 200 GPa, such as 5 GPa, 45 GPa, 95 GPa, 115 GPa, 145 GPa, 180 GPa, or 200 GPa. In some embodiments, the traction film 412 can also be designed without openings, in which case the traction film 412 can be made of a material having an elastic modulus less than 5 GPa. The materials of the traction base material 411 and the traction film 412 are not limited herein.

[0085] In the embodiments in which the first traction member 41 includes the traction base material 411, the first perforation 41a can be provided in the traction base material 411. The first traction member 41 includes an adhesive member 413 connected to the traction film 412 and used to connect the traction film 412 to the flexible screen 20. The adhesive member 413 includes, but is not limited to, a glue layer or a double-sided adhesive tape.

[0086] Any combination of the technical features of the above-described embodiments can be made. To make the description brief, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0087] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A foldable electronic device, characterized in that, The flexible screen includes a flexible display panel having a light exit surface and a flexible glass connected to the flexible display panel and covering the light exit surface, and the hinge mechanism is connected to the flexible screen and opposite a bendable portion of the flexible glass of the flexible screen, and the hinge mechanism is used to flatten or fold the flexible screen corresponding to the position of the bendable portion when rotating, and the flexible glass includes a first support portion, a second support portion, and a bendable portion connected between the first support portion and the second support portion, and the thickness of the first support portion and the second support portion is greater than the thickness of the bendable portion, and the flexible screen includes a first screen body and a second screen body corresponding to opposite sides of the bendable portion, and the side of the first screen body and the second screen body away from the flexible glass is respectively provided with a first connecting portion and a second connecting portion, and the hinge mechanism is connected to the first connecting portion and the second connecting portion. The folding electronic device further includes a traction assembly connected to the side of the flexible screen facing the hinge mechanism, and when the flexible screen moves towards the folded state, the hinge mechanism pulls the bendable portion towards the first connecting portion and the second connecting portion through the traction assembly, and the hinge mechanism includes a middle plate and a first support and a second support connected to both sides of the middle plate, and the first support and the second support can rotate relative to the middle plate to flatten or fold the flexible screen.

2. The foldable electronic device of claim 1, wherein, The first support and the second support form a storage space with the middle plate when the flexible screen is in the folded state, and the bendable portion is stored in the storage space, and the first support and the second support support the flexible screen when the flexible screen is in the flattened state, and the traction assembly includes a first traction and a second traction, one end of the first traction is connected to the first support, and the other end is connected to the flexible screen.

3. The foldable electronic device of claim 1, wherein, One end of the second traction is connected to the second support, and the other end is connected to the flexible screen.

4. The foldable electronic device of claim 3, wherein, The bendable portion is in the shape of a water droplet when in the folded state, and the point of action of the traction assembly on the bendable portion is located in the lower half of the water droplet.

5. The foldable electronic device of claim 4, wherein, The flexible screen is provided with a third connecting portion, the first traction is connected to the first connecting portion and the third connecting portion, and when the flexible screen is in the flattened state, the first traction is arranged in a structural gap of the flexible screen between the first connecting portion and the third connecting portion.

6. The foldable electronic device of claim 3, wherein, When the flexible screen is in the flattened state, the gap between the first traction and the flexible screen is less than or equal to 3 times the thickness of the first traction. When the flexible screen is in the flattened state, the distance between the first connecting portion and the third connecting portion is 1 / 3-1 / 2 of the flattened length of the bendable portion. When the flexible screen is in the flattened state, the distance between the first connecting portion and the third connecting portion is 1 / 3-1 / 2 of the flattened length of the bendable portion.

7. The foldable electronic device of claim 1, wherein, The first connecting part and the second connecting part are symmetrically arranged about a virtual plane, the first supporting part and the second supporting part are symmetrically arranged about the virtual plane, and the first traction part and the second traction part are symmetrically arranged about the virtual plane, wherein the virtual plane is a central symmetry plane of the bendable part in the folded state.

8. The foldable electronic device of claim 1, wherein, The flexible screen comprises a supporting sheet arranged on the bendable part, and the traction assembly is connected to the supporting sheet; when the flexible screen is in the folded state, the traction assembly pulls the supporting sheet to pull the bendable part; and when the flexible screen is in the unfolded state, the supporting sheet applies a tension to the bendable part towards the first connecting part and the second connecting part.

9. The foldable electronic device of claim 8, wherein, The two ends of the supporting sheet are respectively provided with a first part and a second part, the first part and the second part are connected to the flexible screen, and the traction assembly is connected to the side of the supporting sheet away from the bendable part, and the position where the traction assembly is connected to the supporting sheet is between the first part and the second part.

10. The foldable electronic device according to any one of claims 1-9, wherein, The bendable part has a plurality of sub-parts with different thicknesses, and the thickness of the sub-part close to the middle of the bendable part is smaller than the thickness of the sub-part far from the middle of the bendable part.

11. The foldable electronic device of claim 10, wherein, One side surface of the flexible glass is provided with a groove, so that the flexible glass has opposite thickening regions and thinning regions in thickness, the groove corresponds to the thinning region and extends along a straight line, so that the thickening regions are divided into the first supporting part and the second supporting part, and the thinning region forms the bendable part between the first supporting part and the second supporting part.

12. The foldable electronic device of claim 10, wherein, The first supporting part and the second supporting part are both equal-thickness structures, and the thickness of the first supporting part is equal to that of the second supporting part.

13. The foldable electronic device of claim 12, wherein, The thickness of the sub-part located at the middle of the bendable part is d, and the thickness of the first supporting part is D, and 1 / 4≤d / D≤3 / 4.

14. The foldable electronic device of claim 13, wherein, The value range of D is 120 μm-200 μm.

15. The foldable electronic device of claim 11, wherein, The surfaces of the plurality of sub-parts for forming the groove are smoothly and sequentially transitioned.

16. The foldable electronic device of claim 15, wherein, The surfaces of the plurality of sub-parts for forming the groove are all concave curved surfaces. Alternatively, the sub-part located at the middle of the bendable part is an equal-thickness structure, and the surfaces of the other sub-parts for forming the groove are all concave curved surfaces.

17. The foldable electronic device of claim 16, wherein, The curvature of the sub-part located at the middle of the bendable part is smaller than that of the sub-parts located at the two sides.

18. The foldable electronic device of claim 15, wherein, The sub-part located at the middle of the bendable part is an equal-thickness structure, and the surfaces of the other sub-parts for forming the groove are all wedge-shaped inclined surfaces, and the slope of the wedge-shaped inclined surface of the sub-part close to the middle of the bendable part is smaller than that of the sub-part far from the middle of the bendable part.

19. The foldable electronic device of claim 18, wherein, The inclination angle of the wedge-shaped inclined surface closest to the middle of the bendable part is α, and the value range of α is 0.1°≤α≤2°.

20. The foldable electronic device of claim 18, wherein, The width of the groove is W, the width of the sub-part located at the middle of the bendable part is w, and 1 / 2≤w / W≤3 / 4.

21. The foldable electronic device of claim 20, wherein, The width of the sub-part close to the middle of the bendable part is greater than that of the sub-part far from the middle of the bendable part.

22. The foldable electronic device of claim 18, wherein, The width of the sub portion closer to the middle of the bendable portion is greater than the width of the sub portion farther from the middle of the bendable portion.

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