Folding mechanism and folding display device
Patent Information
- Application Number
- GB2025011329
- Authority / Receiving Office
- GB · GB
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-05-26
- Publication Date
- 2025-08-27
AI Technical Summary
As the screen size of the OLED display device increases, how to increase the folding torque has become a design problem, and it is difficult for the prior art to effectively increase the torque of the folding mechanism to adapt to the large-size folding display device.
A folding mechanism is designed to realize self-locking of the rotating shaft and the shaft bag by setting a limiting portion and a gap between the rotating assembly and the shaft bag, and increase the friction force by using gears and elastic friction components, thereby increasing the torque of the folding mechanism. .
It realizes a stable folding and open state suitable for large-size folding display devices, enhances the torque of the folding mechanism, and ensures a stable folding and expansion of the flexible screen.
Abstract
Description
Folding mechanism and folding display device Technical Field
[0001] The present disclosure relates to the field of display technology, and in particular to a folding mechanism and a folding display device. Background Art
[0002] Organic Light-Emitting Diode (OLED) displays offer advantages such as vibrant colors, self-luminescence, thinness, and flexibility. OLED displays can utilize flexible substrates, making them foldable. However, as OLED display screen sizes increase, the torque required to fold them also needs to increase accordingly. This presents a design challenge.
[0003] Summary of the Invention
[0004] In one aspect, a folding mechanism is provided, comprising: a first support member, a first rotating assembly, and a first shaft package. The first rotating assembly comprises a first rotating shaft and a first rotating arm, the first rotating arm being secured to the first rotating shaft. Two shaft packages are secured to the first support member. The first shaft package has a first slit extending through the inner and outer surfaces of the first shaft package and extending through both ends of the first shaft package parallel to the axis of the first rotating shaft. The inner surface of the first shaft package has a second stopper, spaced apart from the first slit along the circumferential direction of the first shaft package. The outer circumferential surface of the first rotating shaft has the first stopper. The first stopper is configured to engage with the second stopper when rotating to a first position and engage with the inner end of the first slit when rotating to a second position. This allows the first rotating shaft and the first shaft package to self-lock twice, allowing the folding mechanism to maintain both an open state and a stable folded state. During these two self-locking processes, the friction between the first rotating shaft and the first shaft package increases the torque of the folding mechanism, making it suitable for large-scale folding display devices.
[0005] In some embodiments, there are two first rotating components, and the two first rotating components are arranged in parallel along the first direction; there are two first shaft packages, and the two first shaft packages are arranged in parallel along the first direction; the first direction intersects with the axis of the first rotating shaft.
[0006] In some embodiments, the first rotating arm has a first tooth structure. The folding mechanism further includes M second shaft packages and M first gears meshed in sequence, the M first gears meshing between the first tooth structures of the two first rotating arms and rotatably mounted within the M second shaft packages; the M second shaft packages are fixed to the first support member; M is greater than or equal to 2 and is an even number.
[0007] In some embodiments, the first rotating assembly further comprises: a second support member, a first curved slide, and a first connecting member, wherein the second support member is located to one side of the first support member along the first direction; the second support member is connected to the first rotating arm. The first curved slide is located on the second support member; the first rotating arm has a first sliding portion that slides in the first curved slide. The first connecting member has a linear slide; the first rotating arm has a second sliding portion that slides in the linear slide.
[0008] In some embodiments, the first rotating assembly further includes: a first arc-shaped block, the first arc-shaped block is fixed on the second supporting member; the first connecting member has a second arc-shaped slide, and the first arc-shaped block is slidably arranged in the second arc-shaped slide.
[0009] In some embodiments, the first rotating assembly further includes: a second connecting member; a first end of the second connecting member is rotatably connected to the first connecting member, and a second end of the second connecting member is rotatably connected to the first supporting member.
[0010] In some embodiments, the second end of the second connecting member and the rotation axis of the first supporting member are parallel to the rotation axis of the first rotating shaft of the first rotating assembly.
[0011] In some embodiments, the folding mechanism further includes: two second rotating assemblies, the two second rotating assemblies being arranged side by side along a first direction; the second rotating assemblies including a second rotating shaft, a second rotating arm, and an elastic friction assembly; the second rotating arm being fixedly mounted on the second rotating shaft; the elastic friction assembly being slidably mounted on the second rotating shaft; and the axis of the first rotating shaft coinciding with the axis of the second rotating shaft. The folding mechanism further includes a third connecting member, the third connecting member being slidably mounted on the second rotating shafts of the two second rotating assemblies, the third connecting member being located between the elastic friction assembly and the second rotating arm; the third connecting member having a first protrusion on a side surface facing the second rotating arm, and the second rotating arm having a second protrusion on a side surface facing the third connecting member. The first rotating arm and the second rotating arm rotate synchronously, and when rotating to the first position, the first protrusion is offset from the second protrusion; when rotating to the second position, the first protrusion contacts the second protrusion, thereby pushing the third connecting member to compress the elastic friction assembly.
[0012] In some embodiments, the second rotating shaft has a third limiting portion; the elastic friction component has a first channel, and the first channel has a fourth limiting portion; the third limiting portion and the fourth limiting portion are engaged to limit the relative rotation of the second rotating shaft and the elastic friction component.
[0013] In some embodiments, the elastic friction assembly includes: a locking member, a first friction member and at least one elastic member, the first friction member is close to the connecting member relative to the at least one elastic member; the locking member is fixed on one end of the second rotating shaft away from the at least one elastic member.
[0014] In some embodiments, the folding mechanism also includes: a fourth connecting member; the fourth connecting member is rotatably mounted on the second rotating shaft of the two second rotating components, and is located between the third connecting member and the first friction member; the second rotating component also includes: a second friction member, the second friction member is mounted and fixed on the second rotating shaft, and is located between the third connecting member and the fourth connecting member.
[0015] In some embodiments, the folding mechanism also includes: a fixing member, which is rotatably mounted on the second rotating shaft of the two second rotating components and is fixedly connected to the first support member; the fixing member has a third sliding portion, the second rotating arm has a third arc-shaped slide, and the third sliding portion is slidably arranged in the third arc-shaped slide.
[0016] In some embodiments, the second rotating arm has a second tooth structure. The folding mechanism further includes: N second gears meshing in sequence, meshing between the second tooth structures of the two second rotating arms, and rotatably mounted on the third connecting member and the fixed member; N is greater than or equal to 2 and is an even number.
[0017] On the other hand, a folding mechanism is provided, comprising: a first support member, a second rotating assembly, and a third connecting member, wherein the second rotating assembly is arranged in parallel along a first direction; the second rotating assembly comprises a second rotating shaft, a second rotating arm, and an elastic friction assembly; the second rotating arm is fixedly mounted on the second rotating shaft; the elastic friction assembly is slidably mounted on the second rotating shaft; the axis of the first rotating shaft coincides with the axis of the second rotating shaft. The third connecting member is slidably mounted on the second rotating shafts of the two second rotating assemblies, and the third connecting member is located between the elastic friction assembly and the second rotating arm; the third connecting member has a first protrusion on a side surface facing the second rotating arm, and the second rotating arm has a second protrusion on a side surface facing the third connecting member. The first rotating arm rotates synchronously with the second rotating arm, and when rotating to the first position, the first protrusion is staggered with the second protrusion; when rotating to the second position, the first protrusion contacts the second protrusion to push the third connecting member to compress the elastic friction assembly.
[0018] On the other hand, a folding display device is provided, comprising: the above-mentioned folding mechanism, a flexible screen and a connecting component, wherein the folding mechanism is located on the back of the flexible screen; and the connecting component connects the flexible screen to the folding mechanism.
[0019] In some embodiments, the connection assembly includes: a flexible fixing member and a locking member. The flexible fixing member is located on the front of the flexible screen; the flexible fixing member is located at one end of the folding axis of the flexible screen and straddles the folding axis; the flexible fixing member is provided with a fixing portion at a position opposite the folding axis. The locking member includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion being connected to the fixing portion, and the second connecting portion being connected to the first support member of the folding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.
[0021] FIG1 is a structural diagram of a foldable display device according to some embodiments;
[0022] FIG2 is a structural diagram of a foldable display device according to some embodiments;
[0023] FIG3 is a structural diagram of a folding mechanism according to some embodiments;
[0024] 4 to 6 are structural diagrams of a first folding mechanism according to some embodiments;
[0025] 7 to 9 are structural diagrams of a second folding mechanism according to some embodiments;
[0026] FIG10 is a structural diagram of a flexible screen and a connection assembly according to some embodiments;
[0027] FIG. 11 is a structural diagram of a connection assembly and a folding mechanism according to some embodiments. DETAILED DESCRIPTION
[0028] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.
[0029] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.
[0030] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.
[0031] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.
[0032] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.
[0033] Some embodiments of the present disclosure provide a foldable display device XS. The foldable display device XS is a product with an image (including static images or dynamic images, wherein the dynamic image may be a video) display function. The foldable display device XS may be, for example: a virtual reality (VR) display device or an augmented reality (AR) display device. The foldable display device XS may also be, for example: a display, a mobile phone (Mobile Phone), a tablet computer (Pad), a laptop computer, a television, a personal digital assistant (PDA), an ultra-mobile personal computer (UMPC), a netbook, a wearable device (such as a smart watch) or a vehicle-mounted display device, etc. This embodiment does not limit the type of the foldable display device XS.
[0034] A foldable display device XS is a foldable display device. It has two states: an open state and a folded state. Figure 1 shows the foldable display device XS in the open state. Referring to Figure 2 , the foldable display device XS includes a flexible screen 2, a folding mechanism 5, and two frames 3. The flexible screen 2 is mounted on the two frames 3 via a folding structure, allowing the flexible screen 2 to be folded using the folding mechanism 5.
[0035] In some examples, the foldable display device XS further includes two rear covers 4 and two connected front frames 1. The front frame 1 and the rear cover 4 are respectively snapped onto the two sides of the frame 3 (e.g., the upper side and the lower side as shown in FIG2 ). For example, the front frame 1 has a raised first stopper, and the frame 3 may have a first stopper groove. The first stopper is inserted into the first stopper groove to assemble the front frame 1 and the frame 3; it can also serve to connect the front frame 1 and the frame 3. The front frame 1 has a raised second stopper, and the rear cover 4 has a second stopper groove. The second stopper is inserted into the second stopper groove to assemble the rear cover 4 and the frame 3; it can also serve to connect the rear cover 4 and the frame 3.
[0036] 3 , the folding mechanism 5 may include a first support member 53 and at least one (e.g., one, or two) first folding mechanisms 54. The first support member 53 has a first surface BM1 and a second surface opposite to each other (the back surface of the first surface BM1 as shown in FIG3 ). The first folding mechanism 54 is located on the side of the first surface BM1 facing away from the second surface and is connected to the first support member 53. For example, the first folding mechanism 54 is provided on the first surface BM1 of the first support member 53. For another example, the first support member 53 has a mounting port for connection, and the first folding mechanism 54 is fixed in the mounting port.
[0037] In some examples, the folding mechanism 5 may further include a second support member 52. In some examples, there may be one second support member 52, located on one side of the first support member 53. In other examples, there may be two second support members 52, located on either side of the first support member 53 along the first direction. The following description uses the case where there are two second support members 52 as an example.
[0038] The first support member 53 is located between the two second support members 52. The first folding mechanism 54 is connected to the two second support members 52. Each first folding mechanism 54 can drive the two second support members 52 to rotate relative to the first support member 53. The folding mechanism 5 also includes at least one (e.g., one, or two) second folding mechanism 51. The second folding mechanism 51 is connected to the first support member 53, and the second folding mechanism 51 is connected to the two second support members 52. Each second folding mechanism 51 can drive the two second support members 52 to rotate relative to the first support member 53; that is, the first folding mechanism 54 and the second folding mechanism 51 can simultaneously drive the two second support members 52 to rotate relative to the first support member 53. As shown in FIG3 , the folding mechanism 5 includes two second folding mechanisms 51 and two first folding mechanisms 54. The two second folding mechanisms 51 are located between the two second folding mechanisms 51. Both the second support member 52 and the first support member 53 can be plate-like structures. The material of the first support member 53 can be carbon fiber. The material of the second support member 52 can be carbon fiber.
[0039] In the related art, existing foldable display devices include a connected flexible display and a folding mechanism for folding the flexible display. As the size of the flexible display increases, the folding mechanism's torque needs to be increased to facilitate folding the larger flexible display. However, increasing the torque of the folding mechanism presents a design challenge.
[0040] Referring to Figures 4 to 6 , the first folding mechanism 54 includes a first rotating assembly 541 and a first shaft package 542. In some examples, there may be one first rotating assembly 541 and one first shaft package 542. In other examples, there may be two first rotating assemblies 541 and two first shaft packages 542; the two first rotating assemblies 541 are arranged side by side along the first direction; and the two first shaft packages 542 are arranged side by side along the first direction. The following description uses the case where there may be two first rotating assemblies 541 and two first shaft packages 542 as an example.
[0041] The first rotating assembly 541 includes a first rotating shaft 5416 and a first rotating arm 5411. The first rotating arm 5411 is mounted and fixed on the first rotating shaft 5416. When the first rotating arm 5411 rotates, it drives the first rotating shaft 5416 to rotate; that is, the first rotating arm 5411 and the first rotating shaft 5416 rotate synchronously about the axis of the first rotating shaft 5416. In some examples, the first rotating arm 5411 includes a first rotating portion and a second mounting portion connected thereto; the second mounting portion has a first through hole TK1, and the first rotating shaft 5416 is fixedly inserted into the first through hole TK1 of the second mounting portion. For example, the cross-sections of the first rotating shaft 5416 and the first through hole TK1 are both "D"-shaped. The first direction intersects (e.g., is perpendicular to) the axis of the first rotating shaft 5416.
[0042] The outer circumference of the first rotating shaft 5416 has a first stopper XW3. The inner surface of the first shaft package 542 has a second stopper 5421. For example, the first shaft package 542 has a second channel, and the second channel has a second stopper 5421. For example, if the cross-section of the first rotating shaft 5416 and the cross-section of the second channel are both D-shaped, then the first stopper XW3 and the second stopper 5421 can both be planes within the D-shape. In this case, the first stopper XW3 can be referred to as the first stopper surface, and the second stopper 5421 can be referred to as the second stopper surface.
[0043] A first rotating shaft 5416 is rotatably mounted within a first shaft package 542, and the two first shaft packages 542 are fixed to the first support member 53. In this way, the first rotating arm 5411 can rotate within the first shaft package 542 via the first rotating shaft 5416. When the first limiting portion XW3 and the second limiting portion 5421 engage, the first rotating shaft 5416 is restricted from rotating within the first shaft package 542. The first rotating shaft 5416 and the first shaft package 542 have an interference fit or a transition fit, which reduces the gap between the first rotating shaft 5416 and the first shaft package 542, thereby preventing the first limiting portion XW3 and the second limiting portion 5421 from shaking or rotating when engaged. Since the first rotating arm 5411 will drive the first rotating shaft 5416 to rotate, in order to enable the first rotating shaft 5416 to rotate in the first shaft package 542, the first shaft package 542 also has a first gap 5422; the first gap 5422 passes through the inner surface and the outer surface of the first shaft package, and passes through both ends of the first shaft package along the direction parallel to the axis of the first rotating shaft. In this way, when the first rotating shaft 5416 rotates from the position where the first limiting portion XW3 and the second limiting portion 5421 are engaged to the position where the first limiting portion XW3 and the second limiting portion 5421 are offset, the first rotating shaft 5416 causes the width of the first gap 5422 to expand. At this time, the first rotating shaft 5416 and the first shaft package 542, for example, change from an interference fit to a clearance fit; thereby, the first rotating shaft 5416 can rotate within the first shaft package 542, thereby increasing the friction between the first rotating shaft 5416 and the first shaft package 542. This friction can increase the torsion of the first folding mechanism, so that the first folding mechanism can be applied to folding display devices of any size (e.g., less than or equal to 40 inches, or greater than 40 inches). The inner end of the first gap 5422 can be understood as a virtual plane in the first gap 5422 close to the inner surface of the first shaft package.
[0044] When the first rotating arm 5411 rotates to the first position, the inner end of the first slit 5422 and one of the second stoppers 5421 engage with the first stopper XW3. This can be understood as the inner end of the first slit 5422 and one of the second stoppers 5421 contacting the first stopper XW3, thereby achieving self-locking between the first rotating shaft 5416 and the first shaft package 542. When the first rotating arm 5411 rotates to the second position, the inner end of the first slit 5422 and the other of the second stoppers 5421 engage with the first stopper XW3. This can be understood as the inner end of the first slit 5422 and the other of the second stoppers 5421 contacting the first stopper XW3, thereby further achieving self-locking between the first rotating shaft 5416 and the first shaft package 542. These two self-locking mechanisms enable the first folding mechanism to maintain both the open and stable folded states.
[0045] In some examples, when the first rotating arm 5411 rotates to the first position, the inner end of the first slit 5422 contacts the first stopper XW3; when the first rotating arm 5411 rotates to the second position, the second stopper 5421 contacts the first stopper XW3. In other examples, when the first rotating arm 5411 rotates to the first position, the second stopper 5421 contacts the first stopper XW3; when the first rotating arm 5411 rotates to the second position, the inner end of the first slit 5422 contacts the first stopper XW3.
[0046] The first position may be one of the position when the first folding mechanism 54 is in the open state and the position when the first folding mechanism 54 is in the folded state, and the second position may be the other of the position when the first folding mechanism 54 is in the open state and the position when the first folding mechanism 54 is in the folded state. For example, the first position may be the position when the first folding mechanism 54 is in the open state, and the second position may be the position when the first folding mechanism 54 is in the folded state. For another example, the second position may be the position when the first folding mechanism 54 is in the open state, and the first position may be the position when the first folding mechanism 54 is in the folded state. Throughout this document, the first position may be the position when the first folding mechanism 54 is in the open state, and the second position may be the position when the first folding mechanism 54 is in the folded state.
[0047] The second limiting portion 5421 and the first slit 5422 are spaced apart along the circumferential direction of the first shaft package 542. In some examples, the plane where the inner end of the first slit 5422 is located intersects the plane where the second limiting portion 5421 is located. For example, the angle between the plane where the inner end of the first slit 5422 is located and the plane where the second limiting portion 5421 is located can be 30° to 90° (for example, 30°, 45°, 60°, 70°, 80°, 90°, etc.). In some examples, the width of the first slit 5422, the first limiting portion XW3, and the width of the second limiting portion 5421 are all approximately equal.
[0048] For example, referring again to Figures 4 to 6 , the first rotating arm 5411 has a first tooth structure CJ2; the first tooth structure CJ2 is composed of a plurality of gear teeth. The first folding mechanism 54 also includes M second shaft packages and M first gears 543 meshing in sequence, where M is greater than or equal to 2 and is an even number. The M first gears 543 mesh between the first tooth structures CJ2 of the two first rotating arms 5411; for example, the first gear 543 closest to the first rotating arm 5411 meshes with the first tooth structure CJ2. The M first gears 543 are rotatably mounted within the M second shaft packages; for example, the first gear 543 is coaxially fixed to the first fixed shaft, with both ends of the first fixed shaft rotatably disposed within the second shaft packages. The rotation axes of the M first gears 543 are parallel to the axis of the first rotating shaft 5416; for example, the axis of the first fixed shaft is parallel to the axis of the first rotating shaft 5416. The M second shaft packages are fixed to the first support member 53. When the two first rotating arms 5411 rotate, the first tooth structure CJ2 on the first rotating arm 5411 drives the first gear 543 to rotate. The N second gears 515 can make the two second rotating arms 5111 rotate synchronously.
[0049] In some embodiments, referring to Figures 4 to 6 , in other examples, the number of second support members 52 may be one, and the first rotating arm 5411 is connected to the second support member 52. In other examples, the number of second support members 52 may be two, and one first rotating arm 5411 is connected to one second support member 52. The following description will continue based on the case where there are two second support members 52.
[0050] In some examples, the first rotating assembly 541 further includes a first curved slide 5412. The first curved slide 5412 is located on the second support member 52; for example, the first curved slide 5412 is fixed to the second support member 52. The first rotating arm 5411 includes a first sliding portion ZD9, which is slidably disposed within the first curved slide 5412. Thus, the first rotating arm 5411 is connected to the second support member 52 via the first curved slide 5412, thereby enabling the first rotating arm 5411 to drive the second support member 52 to rotate via the first curved slide 5412. If the first sliding portion ZD9 is cylindrical, the centerline of the first sliding portion ZD9 is parallel to the axis of the first rotating shaft 5416.
[0051] The first rotating assembly also includes a first connecting member 5413. The first connecting member 5413 has a linear slide (referred to as the first linear slide HD1). The first rotating arm 5411 has a second sliding portion ZXH2, which slides within the first linear slide HD1. This allows the first connecting member 5413 to move linearly relative to the first rotating arm 5411. When the first folding mechanism 54 is in the folded state, the first connecting member 5413 can slide toward the first support member 53. The first connecting member 5413 is fixedly connected to the frame of the foldable display device. When the first folding mechanism 54 is in the folded state, the frame slides toward the first support member 53 along with the first connecting member 5413, bringing the surface of the frame proximate to the first support member 53 closer to the first support member 53 (for example, the surface of the frame proximate to the first support member 53 is parallel to the first support member 53), thereby reducing the gap between the frame and the first support member 53.
[0052] In some examples, the first rotating portion ZD2 can include a first planar plate PM2 and a first curved plate WQ2 connected to each other. The first curved plate PM2 is connected to the first mounting portion AZ2. The first planar plate PM2 has a first opening KK2. The first sliding portions ZD9 can be two, located on two opposing sidewalls of the first opening KK2. Correspondingly, there can also be two first curved slides ZD9, located within the first opening KK2. If there are two first linear slides, the two opposing edges of the first planar plate PM2 slide within the two first linear slides.
[0053] The first rotating assembly further includes a first arc block 545, which is fixed to the second supporting member 52. The first connecting member 5413 has a second arc slide HX2, and the first arc block 545 is slidably disposed in the second arc slide HX2.
[0054] In some embodiments, the first rotating assembly further includes: a second connecting member. The first end of the second connecting member is rotatably connected to the first connecting member 5413. For example, the first end of the second connecting member is connected to the first connecting member 5413 via a second fixed shaft, and the first end of the second connecting member rotates around the axis of the second fixed shaft. The rotation axis of the first end of the second connecting member and the first connecting member 5413 is parallel to the axis of the first rotating shaft, for example, the axis of the second fixed shaft is parallel to the axis of the first rotating shaft. The second end of the second connecting member is rotatably connected to the first support member 53. The rotatable connection between the first end of the second connecting member and the first connecting member 5413 can be referred to the relevant description of the rotatable connection between the first end of the sixth connecting member and the fifth connecting member below. The rotatable connection between the second end of the second connecting member and the first support member 53 can be referred to the relevant description of the rotatable connection between the second end of the sixth connecting member and the first support member 53 below.
[0055] In some examples, the rotational axis between the second end of the second connector and the first support member 53 is located between the rotational axes of the first rotating shafts of the two first rotating assemblies. The rotational axis between the second end of the second connector and the first support member 53 is parallel to the rotational axes of the first rotating shafts of the two first rotating assemblies. This ensures that the rotational axis between the second end of the second connector and the first support member is not concentric with the rotational axis between the first rotating arm and the first curved slideway, thereby enabling the first connector to slide linearly relative to the first rotating arm.
[0056] 7 to 9 , the second folding mechanism 51 includes two second rotating components 511 , and the second rotating components 511 are arranged in parallel along the first direction.
[0057] The second rotating assembly 511 includes a second rotating shaft 5116 , a second rotating arm 5111 and an elastic friction assembly 5118 .
[0058] The second rotating arm 5111 is mounted on and fixed to the second rotating shaft 5116. When the second rotating arm 5111 rotates, it drives the second rotating shaft 5116 to rotate as well; that is, the second rotating arm 5111 and the second rotating shaft 5116 rotate synchronously about the axis of the second rotating shaft 5116. In some examples, the second rotating arm 5111 includes a connected second rotating portion ZD1 and at least one (e.g., one or two) second mounting portions AZ1. The second mounting portion AZ1 has a through-hole TK2, and the second rotating shaft 5116 is fixedly inserted into the through-hole TK2 of the second mounting portion AZ1. The axes of the through-holes TK2 of the two second mounting portions AZ1 coincide.
[0059] The axis of the second rotating shaft 5116 coincides with the axis of the first rotating shaft 5416 , so that the second rotating arm 5111 and the first rotating arm 5411 can rotate synchronously.
[0060] The elastic friction assembly 5118 is slidably mounted on the second shaft 5116. In some examples, the elastic friction assembly 5118 has a first channel, the second shaft 5116 is inserted into the first channel, and there is a gap between the second shaft 5116 and the first channel (for example, the second shaft 5116 and the first channel are loosely fitted), so that the elastic friction assembly 5118 can slide relative to the second shaft 5116.
[0061] Furthermore, the elastic friction assembly 5118 is restricted from rotating relative to the second rotating shaft 5116, so that the elastic friction assembly 5118 rotates synchronously with the second rotating shaft 5116. In some examples, the second rotating shaft 5116 has a third limiting portion XW1, and the first channel has a fourth limiting portion. For example, if the cross-sections of the second rotating shaft 5116 and the first channel are both D-shaped, then the third limiting portion XW1 and the fourth limiting portion can both be planes within the D-shape. The third limiting portion XW1 is engaged with the fourth limiting portion, for example, the "D"-shaped second rotating shaft 5116 is inserted into the "D"-shaped first channel; to limit the relative rotation of the second rotating shaft 5116 and the elastic friction component 5118; in other examples, the cross-section of the second rotating shaft 5116 and the cross-section of the first channel are both regular polygons (such as quadrilaterals, pentagons, hexagons, etc.) or ellipses, etc., for example, the pentagonal second rotating shaft 5116 is sleeved in the pentagonal first channel, thereby limiting the rotation of the elastic friction component 5118 relative to the second rotating shaft 5116.
[0062] In this way, the elastic friction component 5118 can slide on the second rotating shaft 5116 along the axial direction of the second rotating shaft 5116; and the elastic friction component 5118 and the second rotating shaft 5116 rotate synchronously.
[0063] The second folding mechanism 51 also includes a third connecting member 513. The third connecting member 513 is located between the elastic friction assembly 5118 and the second rotating arm 5111. The third connecting member 513 is slidably mounted on the second rotating shafts 5116 of the two second rotating assemblies 511. In other words, the third connecting member 513 can slide on the second rotating shafts 5116 of the two second rotating assemblies 511 along the axis of the second rotating shafts 5116. In some examples, the third connecting member 513 has two second through holes, and the second rotating shafts 5116 of the two second rotating assemblies 511 are respectively inserted into the two second through holes. The aperture of the second through holes is larger than the aperture of the second rotating shaft 5116 (for example, the second rotating shaft 5116 and the second through hole can be a clearance fit), so that the third connecting member 513 can slide on the second rotating shaft 5116 along the axis of the second rotating shaft 5116.
[0064] In addition, the second rotation shafts 5116 of the two second rotational components 511 are rotatably mounted on the third connecting member 513. For example, the second rotation shafts 5116 of the two second rotational components 511 rotate in the two second through holes of the third connecting member 513 respectively.
[0065] The third connecting member 513 has a plurality of first protrusions TQ1 on one side of the surface facing the second pivot arm 5111. The portion between two first protrusions TQ1 is referred to as a first recess AX1. In some examples, the first protrusion TQ1 may include a first slope and a second slope. One of the first slope and the second slope has an angle less than 90°, while the other has an angle greater than 90°. This means that one of the first and second slopes is an upward slope and the other is a downward slope. The junction of the first and second slopes is a first protrusion end, and the junction of the first slope of a first protrusion TQ1 and the second slope of an adjacent first protrusion TQ1 is a first recess AX1.
[0066] The second pivot arm 5111 has a plurality of second protrusions TQ2 on one side of the surface facing the third connector 513; the portion between two second protrusions TQ2 is referred to as a second recess AX2. For example, the second mounting portion AZ1 has a plurality of second protrusions TQ2 on one side of the surface facing the third connector 513. In some examples, the second protrusions TQ2 may include a third slope and a fourth slope. One of the cut-off angles of the third slope and the cut-off angle of the fourth slope is less than 90°, while the other is greater than 90°, meaning that one of the third and fourth slopes is an upward slope and the other is a downward slope. The junction of the third and fourth slopes is the second protrusion end, and the junction of the third slope of a second protrusion TQ2 and the fourth slope of an adjacent second protrusion TQ2 is the second recess AX2.
[0067] When the second pivot arm 5111 rotates to the first position, the plurality of first protrusions TQ1 are offset from the plurality of second protrusions TQ2. For example, the ends of the first protrusions are located in the second recess AX2, while the ends of the second protrusions are located in the first recess AX1. Because the second pivot arm 5111 is rotatable, when the second pivot arm 5111 rotates to the second position, the plurality of first protrusions TQ1 contact the plurality of second protrusions TQ2. For example, the ends of the second protrusions are located on the first or second slope, while the ends of the first protrusions are located on the third or fourth slope. In another example, the ends of the first protrusions are directly opposite the ends of the second protrusions.
[0068] As a result, the first and second pivot arms 5111 rotate synchronously. During the rotation of the second pivot arm 5111 from the first position to the second position, the first protrusion TQ1 and the second protrusion TQ2 transition from being offset to contacting each other. Furthermore, the second pivot arm 5111 is fixedly connected to the second pivot shaft 5116, causing the third connecting member 513 to move away from the second pivot arm 5111. The third connecting member 513 pushes the elastic friction assembly 5118 away from the second pivot arm 5111, squeezing the elastic friction assembly 5118 and generating a rebound force. During this process, the second pivot arm 5111 also rotates the second pivot shaft 5116, which in turn rotates the elastic friction assembly 5118. The second pivot shaft 5116 can rotate relative to the third connecting member 513, allowing the elastic friction assembly 5118 to rotate relative to the third connecting member 513. This generates friction between the elastic friction assembly 5118 and the third connecting member 513, thereby generating torsional force in the second folding mechanism 51.
[0069] In some embodiments, the elastic friction assembly 5118 includes a locking member 5119, a first friction member TX1, and at least one (e.g., one or more) elastic member TX2. The first friction member TX1 is positioned closer to the third connecting member 513 than the at least one elastic member TX2. As a result, during the rotation of the second rotating arm 5111 from the first position to the second position, friction is generated between the first friction member TX1 and the third connecting member 513. The elastic member TX2 is compressed, generating a rebound force that maintains contact between the first friction member TX1 and the third connecting member 513. In some examples, the first friction member TX1 has a third through-hole, and the elastic member TX2 has a fourth through-hole. The axes of the third and fourth through-holes coincide to form a first passage. For example, the elastic member TX2 may be a disc spring, a spring, or the like. For example, the first friction member TX1 may be a friction plate, which may have a circular, rectangular, or other shape. The first friction member TX1 has multiple oil holes. Adding oil to these oil holes can enhance the wear resistance of the first friction member TX1.
[0070] The locking member 5119 is fixed to an end of the second rotating shaft 5116 away from the at least one elastic member TX2, thereby preventing the elastic friction assembly 5118 from slipping off the second rotating shaft 5116. For example, the locking member 5119 can be a locking nut, which can also play an adjustment role.
[0071] In some examples, the second folding mechanism 51 further includes a fourth connecting member 514. The fourth connecting member 514 is slidably mounted on the second rotating shafts 5116 of the two second rotating assemblies 511. That is, the fourth connecting member 514 can slide on the second rotating shafts 5116 of the two second rotating assemblies 511 along the axis of the second rotating shafts 5116. In some examples, the fourth connecting member 514 has two fifth through holes, and the second rotating shafts 5116 of the two second rotating assemblies 511 are respectively inserted into the two fifth through holes. The aperture of the fifth through holes is larger than the aperture of the second rotating shafts 5116 (for example, the second rotating shafts 5116 and the fifth through holes can be a clearance fit), allowing the fourth connecting member 514 to slide on the second rotating shafts 5116 along the axis of the second rotating shafts 5116. In addition, the second rotating shafts 5116 of the two second rotating assemblies 511 are rotatably mounted on the fourth connecting member 514. For example, the second rotation shafts 5116 of the two second rotational assemblies 511 respectively rotate in the two fifth through holes of the fourth connecting member 514. The fourth connecting member 514 is located between the third connecting member 513 and the first friction member TX1.
[0072] The second rotating assembly 511 further includes a second friction member 5117. The second friction member 5117 is slidably mounted on the second rotating shaft 5116. In some examples, the second friction member 5117 has a sixth through-hole into which the second rotating shaft 5116 is inserted. A clearance exists between the second rotating shaft 5116 and the sixth through-hole (e.g., a clearance fit exists between the second rotating shaft 5116 and the sixth through-hole), allowing the second friction member 5117 to slide relative to the second rotating shaft 5116. Furthermore, the second friction member 5117 is restricted from rotating relative to the second rotating shaft 5116, allowing the second friction member 5117 and the second rotating shaft 5116 to rotate synchronously. In some examples, the sixth through-hole has a D-shaped cross-section. The D-shaped second rotating shaft 5116 is inserted into the D-shaped sixth through-hole, thereby restricting relative rotation between the second rotating shaft 5116 and the elastic friction assembly 5118. In this way, the second friction member 5117 can slide on the second rotating shaft 5116 along the axial direction of the second rotating shaft 5116 ; and the second friction member 5117 and the second rotating shaft 5116 rotate synchronously.
[0073] The second friction member 5117 is located between the third connecting member 513 and the fourth connecting member 514. Specifically, along the axis of the second rotating shaft 5116, the third connecting member 513, the second friction member 5117, the fourth connecting member 514, the first friction member TX1, the elastic member TX2, and the locking member 5119 are sequentially arranged. This generates friction between the first friction member TX1 and the fourth connecting member 514, between the second friction member 5117 and the third connecting member 513, and between the second friction member 5117 and the fourth connecting member 514. This increases the friction of the second folding mechanism 51, and thus the torsional force of the second folding mechanism 51.
[0074] In some examples, in each second rotating assembly 511, a second rotating shaft 5116 is disposed within the through-hole TK2 of the second mounting portion AZ1. In other words, the second rotating shaft 5116 extends on both sides of the second mounting portion AZ1. The extended portions of the second rotating shaft 5116 located on either side of the second mounting portion AZ1 are symmetrically provided with a third connecting member 513, a second friction member 5117, a fourth connecting member 514, a first friction member TX1, an elastic member TX2, and a locking member 5119. This increases the friction and torque of the second folding mechanism 51. The number of first friction members TX1 located on either side of the second mounting portion can be equal or unequal.
[0075] In some embodiments, referring to Figures 7 to 9 , the second folding mechanism 51 further includes: a fixing member 512. The fixing member 512 is rotatably mounted on the second rotating shafts 5116 of the two second rotating components 511. For example, the fixing member 512 has two seventh through holes, the aperture of the seventh through holes is larger than the diameter of the second rotating shaft 5116 (for example, the seventh through holes are clearance-fitted with the second rotating shaft 5116), and the second rotating shafts 5116 of the two second rotating components 511 are inserted into the two seventh through holes of the fixing member 512. In some examples, when there are two second mounting portions AZ1, the fixing member 512 is located between the two second mounting portions AZ1. The fixing member 512 is fixedly connected to the first support member 53, for example, by using bolts, snaps, etc. to fix the fixing member 512 to the first support member 53.
[0076] The second rotating arm 5111 has a third curved slide ZD12. For example, when there are two second mounting parts AZ1, a third curved slide ZD12 can be formed between the two second mounting parts AZ1. The fixing member 512 has a third sliding part 5121, which is slidably arranged in the third curved slide ZD12. When the second rotating arm 5111 rotates, the third sliding part 5121 slides in the third curved slide ZD12. When the third sliding part 5121 contacts the first limit end of the third curved slide ZD12, the second folding mechanism 51 is in the first position; when the third sliding part 5121 contacts the second limit end of the third curved slide ZD12, the second folding mechanism 51 is in the second position. The first limiting end and the second limiting end of the third curved slide ZD12 are two extreme positions of the third curved slide ZD12 , that is, the third sliding portion 5121 only slides between the first limiting end and the second limiting end of the third curved slide ZD12 .
[0077] Continuing with Figures 7 to 9 , the second rotating arm 5111 has a second tooth structure CJ1, which is composed of a plurality of gear teeth. The second folding mechanism 51 also includes N second gears 515 meshing in sequence. N is greater than or equal to 2 and is an even number; for example, N is equal to 2. The N second gears 515 mesh between the second tooth structures CJ1 of the two second rotating arms 5111. For example, the second gear 515 closest to the second rotating arm 5111 meshes with the second tooth structure CJ1. The N second gears 515 are rotatably mounted on the third connecting member 513 and the fixed member 512. For example, the second gear 515 is coaxially fixed to the fourth fixed shaft, with the ends of the fourth fixed shaft rotatably disposed in the eighth through-hole of the third connecting member 513 and the ninth through-hole of the fixed member 512, respectively. The rotation axes of the N second gears 515 are parallel to the axis of the second rotating shaft 5116. For example, the axis of the fourth fixed shaft is parallel to the axis of the second rotating shaft 5116. When the two second rotating arms 5111 rotate, the second tooth structure CJ1 on the second rotating arm 5111 drives the second gear 515 to rotate. The N second gears 515 can make the two second rotating arms 5111 rotate synchronously.
[0078] In some embodiments, referring again to Figures 7 to 9 , when there are two second support members 52, one second rotating arm 5111 is connected to each second support member 52. In some examples, the second rotating assembly 511 further includes a fourth curved slide 5114 and a fifth connecting member 5112. The fourth curved slide 5114 is located on the second support member 52; for example, the fourth curved slide 5114 is fixed to the second support member 52. The second rotating arm 5111 has a fourth sliding portion ZD10 that slides within the fourth curved slide 5114. The fifth connecting member 5112 has a second linear slide HD2. The second rotating arm 5111 has a fifth sliding portion ZXH1 that slides within the second linear slide HD2. If the fourth sliding portion ZD10 is cylindrical, the centerline of the fourth sliding portion ZD10 is parallel to the axis of the second rotating shaft 5116. The description of the connection between the second rotating arm 5111 and a second support member 52 may refer to the related description of the connection between the first rotating arm 5411 and a second support member 52 .
[0079] The second rotating assembly 511 further includes a second arc block 5115, which is fixed to the second supporting member 52. The fifth connecting member 5112 has a fifth arc slide HX5, and the second arc block 5115 is slidably disposed in the fifth arc slide HX5.
[0080] In some embodiments, the second rotating assembly 511 further includes a sixth connecting member 5113. The first end of the sixth connecting member 5113 is rotatably connected to the fifth connecting member 5112. For example, the first end of the sixth connecting member 5113 is connected to the fifth connecting member 5112 via a fifth fixed axis, and the first end of the sixth connecting member 5113 rotates about the axis of the fifth fixed axis. The rotation axis between the first end of the sixth connecting member 5113 and the fifth connecting member 5112 is parallel to the axis of the second rotating axis 5116. For example, the axis of the fifth fixed axis is parallel to the axis of the second rotating axis 5116. The second end of the sixth connecting member 5113 is rotatably connected to the first support member 53. For example, the first support member 53 has a first hollow portion, and a semi-cylindrical third fixed axis is disposed on the first support member 53, and the third fixed axis is located within the first hollow portion. The second end of the sixth connecting member 5113 is semi-cylindrical and engages with the third fixed axis, thereby achieving a rotatable connection between the second end of the sixth connecting member 5113 and the first support member 53. A fixed cover is mounted on the first support member 53, with the fixed cover facing the first hollow portion, thereby confining the second end of the sixth connecting member 5113 between the fixed cover and the third fixed axis. In some examples, the rotation axis between the second end of the sixth connecting member 5113 and the first support member 53 is located between the rotation axes of the second rotating shafts 5116 of the two second rotating assemblies 511. The rotation axis between the second end of the sixth connecting member 5113 and the first support member 53 is parallel to the rotation axes of the second rotating shafts 5116 of the two second rotating assemblies 511.
[0081] An embodiment of the present disclosure provides a folding display device XS. Referring to Figures 10 and 11, the folding display device XS also includes a connecting component 6. The folding mechanism is located on the back of the flexible screen 2; the connecting component 6 connects the flexible screen 2 to the folding mechanism.
[0082] In some examples, the connection assembly 6 includes: a flexible fixing member 61 and a locking member 62. The flexible fixing member 61 is located on the front of the flexible screen 2; for example, the flexible fixing member 61 contacts the frame of the flexible screen 2 and does not contact the display area of the flexible screen 2. The flexible fixing member 61 is located at one end of the folding axis of the flexible screen 2 and straddles the folding axis. The folding axis of the flexible screen 2 is directly opposite the first support member (for example, the centerline of the first support member 53 is directly opposite). A fixing portion LJ is provided on the flexible fixing member 61 at a position opposite the folding axis. For example, the fixing portion LJ can be a connecting hole. The connecting hole LJ is directly opposite the first support member 53 (for example, the centerline of the connecting hole LJ is directly opposite the centerline of the first support member 53). The locking member 62 includes a first connecting portion 621 and a second connecting portion 622, which are connected to each other. The first connecting portion 621 is connected to the fixing portion LJ. For example, the first connecting portion 621 is inserted into the connecting hole. This prevents the portion of the flexible member 61 that is directly opposite the first support member from arching. The second connecting portion 622 is fixedly connected to the first support member 53 of the folding mechanism; for example, the second connecting portion 622 is inserted into a groove in the first support member 53 from the second surface BM2 of the first support member and is adhered using glue. The flexible fixing member 61 is made of a flexible, impact-resistant material, such as rubber (e.g., thermoplastic polyurethane rubber). The first connecting portion 621 and the second connecting portion 622 can be integrally formed. The first connecting portion 621 and the second connecting portion 622 can be made of a metal material, such as aluminum or iron.
[0083] In some examples, a gap of 0.2 mm to 0.5 mm (e.g., 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc.) exists between the flexible fixing member 61 and the flexible screen 2. This gap can prevent the flexible fixing member 61 from crushing the flexible screen 2. For example, a cushioning foam can be filled in the gap to reduce shaking of the flexible screen 2.
[0084] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.
Claims
1. A folding mechanism, comprising: a first support member; A first rotating assembly comprises a first rotating shaft and a first rotating arm, wherein the first rotating arm is sleeved and fixed on the first rotating shaft; as well as, A first shaft package is fixed on the first support member; the first shaft package has a first slit, the first slit runs through the inner surface and the outer surface of the first shaft package, and runs through both ends of the first shaft package in a direction parallel to the axis of the first rotating shaft; the inner surface of the first shaft package has a second limit portion, and the second limit portion and the first slit are spaced apart in the circumferential direction of the first shaft package; Wherein, the outer peripheral surface of the first rotating shaft has a first limiting portion, and the first limiting portion is used to: engage with the second limiting portion when rotating to the first position, and engage with the inner end of the first gap when rotating to the second position.
2. The folding mechanism according to claim 1, wherein: There are two first rotating components, which are arranged in parallel along a first direction; there are two first shaft packages, which are arranged in parallel along a first direction; and the first direction intersects with the axis of the first rotating shaft.
3. The folding mechanism according to claim 2, wherein: The first rotating arm has a first tooth structure; The folding mechanism further includes M second shaft packages and M first gears meshed in sequence, wherein the M first gears mesh between the first tooth structures of the two first rotating arms and are rotatably sleeved in the M second shaft packages; The M second shaft packages are fixed on the first support member; M is greater than or equal to 2 and is an even number.
4. The folding mechanism according to any one of claims 1 to 3, wherein: The folding mechanism comprises: a second support member, located at one side of the first support member along the first direction; the second support member is connected to the first rotating arm; The first rotating assembly also includes: a first arcuate slide and a first connecting member, the first arcuate slide is located on the second supporting member; the first rotating arm has a first sliding portion, the first sliding portion is slidably set in the first arcuate slide; the first connecting member has a straight slide; the first rotating arm has a second sliding portion, the second sliding portion is slidably set in the straight slide.
5. The folding mechanism according to claim 4, wherein: The first rotating assembly further includes: The first arc block is fixed on the second supporting member; the first connecting member has a second arc slideway, and the first arc block is slidably arranged in the second arc slideway.
6. The folding mechanism according to any one of claims 1 to 5, wherein: The first rotating assembly further includes: A second connecting member; a first end of the second connecting member is rotatably connected to the first connecting member, and a second end of the second connecting member is rotatably connected to the first supporting member.
7. The folding mechanism according to claim 6, wherein: The second end of the second connecting member and the rotation axis of the first supporting member are parallel to the rotation axis of the first rotating shaft of the first rotating assembly.
8. The folding mechanism according to any one of claims 1 to 7, wherein: The folding mechanism further comprises: two second rotating components arranged in parallel along the first direction; the second rotating components comprise a second rotating shaft, a second rotating arm and an elastic friction component; the second rotating arm is sleeved and fixed on the second rotating shaft; the elastic friction component is slidably sleeved on the second rotating shaft; the axis of the first rotating shaft coincides with the axis of the second rotating shaft; The folding mechanism further comprises a third connecting member, which is slidably mounted on the second rotating shafts of the two second rotating components, and is located between the elastic friction component and the second rotating arm; a first protrusion is provided on a side surface of the third connecting member facing the second rotating arm, and a second protrusion is provided on a side surface of the second rotating arm facing the third connecting member; Wherein, the first rotating arm and the second rotating arm rotate synchronously, and when rotating to the first position, the first protrusion and the second protrusion are staggered; when rotating to the second position, the first protrusion contacts the second protrusion to push the third connecting member to compress the elastic friction component.
9. The folding mechanism according to claim 8, wherein: The second rotating shaft has a third limiting portion; the elastic friction component has a first channel, and the first channel has a fourth limiting portion; the third limiting portion is engaged with the fourth limiting portion to limit the relative rotation of the second rotating shaft and the elastic friction component.
10. The folding mechanism according to claim 8 or 9, wherein: The elastic friction assembly includes: a locking member, a first friction member and at least one elastic member, the first friction member is close to the third connecting member relative to the at least one elastic member; the locking member is fixed on one end of the second rotating shaft away from the at least one elastic member.
11. The folding mechanism according to claim 10, wherein: The folding mechanism further includes: a fourth connecting member; the fourth connecting member is rotatably mounted on the second rotating shafts of the two second rotating components and is located between the third connecting member and the first friction member; The second rotating assembly further includes: a second friction member, which is fixedly mounted on the second rotating shaft and located between the third connecting member and the fourth connecting member.
12. The folding mechanism according to any one of claims 8 to 11, wherein: The folding mechanism also includes: a fixing member, which is rotatably mounted on the second rotating shafts of the two second rotating components and fixedly connected to the first supporting member; the fixing member has a third sliding portion, the second rotating arm has a third arc-shaped slide, and the third sliding portion is slidably arranged in the third arc-shaped slide.
13. The folding mechanism according to claim 12, wherein: The second rotating arm has a second tooth structure; The folding mechanism also includes: N second gears meshing in sequence, meshing between the second tooth structures of the two second rotating arms, and rotatably mounted on the third connecting member and the fixing member; N is greater than or equal to 2 and is an even number.
14. A folding mechanism, comprising: a first support member; Two second rotating assemblies are arranged in parallel along the first direction; the second rotating assemblies include a second rotating shaft, a second rotating arm and an elastic friction assembly; The second rotating arm is sleeved and fixed on the second rotating shaft; the elastic friction component is slidably sleeved on the second rotating shaft; the axis of the first rotating shaft coincides with the axis of the second rotating shaft; and a third connecting member, slidably mounted on the second rotating shafts of the two second rotating components, the third connecting member being located between the elastic friction component and the second rotating arm; a first protrusion is provided on a side surface of the third connecting member facing the second rotating arm, and a second protrusion is provided on a side surface of the second rotating arm facing the third connecting member; Wherein, the first rotating arm and the second rotating arm rotate synchronously, and when rotating to the first position, the first protrusion and the second protrusion are staggered; When rotating to the second position, the first protrusion contacts the second protrusion to push the third connecting member to compress the elastic friction assembly.
15. A foldable display device, comprising: Flexible screen; The folding mechanism according to any one of claims 1 to 14, located on the back side of the flexible screen; as well as, A connecting component connects the flexible screen to the folding mechanism.
16. The foldable display device according to claim 15, wherein: The connection component comprises: A flexible fixing member is located on the front of the flexible screen; the flexible fixing member is located at one end of the folding axis of the flexible screen and straddles the folding axis; a fixing portion is provided on the flexible fixing member at a position opposite to the folding axis; The locking member comprises a first connecting portion and a second connecting portion connected to each other, wherein the first connecting portion is connected to the fixing portion, and the second connecting portion is connected to the first supporting member of the folding mechanism.