Rotating mechanism and foldable electronic device

Abstract

This application provides a rotating mechanism and a foldable electronic device. The rotating mechanism includes a support base, a mounting component, a main swing arm, a secondary swing arm, and an auxiliary swing arm. The main swing arm is rotatably connected to the support base; the secondary swing arm is rotatably connected to the support base and slidably connected to the mounting component; the auxiliary swing arm includes an auxiliary section, which is rotatably connected to the mounting component, rotatably connected to the main swing arm, and slidably and rotatably connected to the secondary swing arm. By setting the auxiliary swing arm, the rotation angle of the main swing arm is reduced, the wall thickness of the main swing arm is increased, and the structural strength of the main swing arm and the rotating mechanism are improved. The increased screen-accommodating space eliminates the need for a screen-accommodating groove on the upper surface of the support base, or simplifies the design by requiring only a shallower groove. Therefore, when the foldable electronic device is in its unfolded state, the display screen is reliably supported, increasing the reliability of the display screen.

Description

[0001] This application is a divisional application of Chinese patent application filed on April 9, 2025, with application number 202510442796.4 and entitled "Rotating Mechanism and Foldable Electronic Device". Technical Field

[0002] This application relates to the field of electronic product technology, and in particular to a rotating mechanism and a foldable electronic device. Background Technology

[0003] With the development of technology, various electronic devices have become indispensable products in daily life and production. Among them, foldable electronic devices have gradually become a development trend due to their advantages of larger display area and portability.

[0004] Foldable electronic devices rely mainly on a rotating mechanism to achieve their folding function. However, current rotating mechanisms have poor structural strength and can easily lead to reduced display reliability. Summary of the Invention

[0005] The rotating mechanism and foldable electronic device provided in this application improve the structural strength of the rotating mechanism and the reliability of the display screen.

[0006] The first aspect of this application provides a rotating mechanism, including: a support base, a mounting member, a main swing arm, a secondary swing arm, and an auxiliary swing arm. The main swing arm is rotatably connected to the support base; the secondary swing arm is rotatably connected to the support base and slidably connected to the mounting member; the auxiliary swing arm includes an auxiliary section, which is rotatably connected to the mounting member, rotatably connected to the main swing arm, and slidably and rotatably connected to the secondary swing arm.

[0007] It is understood that there are two mounting components, two main swing arms, two secondary swing arms, and two auxiliary swing arms. The two mounting components are the first mounting component and the second mounting component, the two main swing arms are the first main swing arm and the second main swing arm, the two secondary swing arms are the first secondary swing arm and the second secondary swing arm, and the two auxiliary swing arms are the first auxiliary swing arm and the second auxiliary swing arm.

[0008] Along the width direction of the rotating mechanism, the first mounting component and the second mounting component are located on opposite sides of the support base. Both the first main swing arm and the second main swing arm are rotatably connected to the support base. The first main swing arm is rotatably connected to the first auxiliary swing arm, and the first auxiliary swing arm is rotatably connected to the first mounting component. The second main swing arm is rotatably connected to the second auxiliary swing arm, and the second auxiliary swing arm is rotatably connected to the second mounting component. Both the first secondary swing arm and the second secondary swing arm are rotatably connected to the support base. The first secondary swing arm is slidably connected to the first mounting component and slidably and rotatably connected to the first auxiliary swing arm. The second secondary swing arm is slidably connected to the second mounting component and slidably and rotatably connected to the second auxiliary swing arm.

[0009] The rotating mechanism has a folded state and an unfolded state. When switching between the folded and unfolded states, the first main swing arm and the second main swing arm rotate relative to the supporting base. The first main swing arm rotates relative to the first auxiliary swing arm, and the first auxiliary swing arm rotates relative to the first mounting member. The second main swing arm rotates relative to the second auxiliary swing arm, and the second auxiliary swing arm rotates relative to the second mounting member. The first secondary swing arm and the second secondary swing arm rotate relative to the supporting base, the first secondary swing arm slides relative to the first mounting member, and the second secondary swing arm slides relative to the second mounting member. This achieves the relative unfolding or relative folding of the first and second mounting members.

[0010] The rotating mechanism is used in a foldable electronic device, which includes a first housing, a second housing, and a display screen. A first mounting member is mounted on the first housing, and a second mounting member is mounted on the second housing. The display screen includes a first display section, a third display section, and a second display section connected in sequence. The first display section is fixed to the first housing, the second display section is fixed to the second housing, the third display section is opposite to the rotating mechanism, and the third display section is not fixed to a support base.

[0011] The rotating mechanism switches between an unfolded and folded state, enabling the foldable electronic device to switch between these states. When the foldable electronic device switches between these states, the display screen unfolds or folds accordingly. Both the first and second display units are fixed, therefore they do not bend. The third display unit bends or unfolds according to the state of the foldable electronic device. When the foldable electronic device is in the folded state, the rotating mechanism forms a screen-accommodating space, part of the inner wall of which is the upper surface of the support base. The third display unit bends into a teardrop shape, and the bent third display unit is located within the screen-accommodating space.

[0012] In this application, by setting an auxiliary swing arm, the rotation angle of the secondary swing arm can be reduced, thereby increasing the wall thickness of the secondary swing arm and / or increasing the screen housing space. Increasing the wall thickness of the secondary swing arm increases its structural strength. Increasing the screen housing space eliminates the need for a screen housing groove on the upper surface of the support base, or suffices to have a very shallow groove. Therefore, when the foldable electronic device is in its unfolded state, the display screen is reliably supported, improving its flatness, increasing its sensitivity, and reducing the risk of damage.

[0013] The following explains the principle behind increasing the wall thickness of the secondary swing arm: The mounting component and the support base are connected by two levels of swing arms, namely the main swing arm and the auxiliary swing arm. While the main swing arm rotates relative to the support base, it also rotates relative to the auxiliary swing arm, which in turn rotates relative to the mounting component. In this way, compared to a scheme where the mounting component and the support base are only connected by the rotation of the main swing arm, the rotation angle of the main swing arm relative to the support base is reduced.

[0014] The wall thickness of the main swing arm is affected by its rotation angle. This is because, when the foldable electronic device is in the unfolded state, a portion of the main swing arm is located in the gap between the housing and the support base. This portion cannot protrude beyond the gap to avoid affecting the appearance of the foldable electronic device. When the foldable electronic device is in the folded state, a portion of the main swing arm also helps to enclose the screen space, and this portion cannot compress the display screen. Therefore, the total operating space of the main swing arm is fixed when the foldable electronic device switches between the unfolded and folded states. With the total operating space and screen space of the main swing arm remaining constant, a larger rotation angle requires more space for rotation, resulting in less space for the main swing arm's wall thickness, and thus a thinner wall. Conversely, a smaller rotation angle requires less space for rotation, resulting in more space for the main swing arm's wall thickness, and thus a thicker wall.

[0015] In this embodiment, by setting an auxiliary swing arm, the rotation angle of the main swing arm is reduced. The space saved by reducing the rotation angle of the main swing arm can be used to increase the wall thickness of the main swing arm, thereby increasing the structural strength of the main swing arm and thus improving the overall structural strength of the rotating mechanism.

[0016] The following explains the principle behind increasing the volume of the screen-accommodating space: The rotation angle of the main swing arm decreases, while the wall thickness of the main swing arm remains constant or increases only slightly. This increases the distance between the upper surfaces of the two main swing arms, effectively increasing the volume of the screen-accommodating space. Consequently, the depth of the screen-accommodating groove on the upper surface of the support base can be reduced, or even eliminated altogether to increase the screen-accommodating space, thereby improving the flatness of the upper surface of the support plate. Therefore, when the foldable electronic device is in its unfolded state, the display screen is reliably supported, improving its flatness, increasing its sensitivity, and reducing the risk of damage—in other words, increasing the display screen's reliability.

[0017] In some embodiments, the auxiliary swing arm is provided with a supporting surface; the auxiliary swing arm also includes a stop section, which is fixedly connected to the auxiliary section along the length direction of the rotating mechanism, and the stop section is provided with a stop surface; the rotating mechanism includes an unfolded state and a folded state. When the rotating mechanism is in the folded state, the supporting surface and the stop surface are opposite to each other, which includes both contact and gap.

[0018] When a foldable electronic device is folded and its support base is subjected to external impact, the display screen can be prevented from being squeezed and thus from being damaged by setting the supporting surface and the stop surface to face each other.

[0019] When the foldable electronic device is in a folded state, there is a gap h1 between the supporting surface and the stop surface. Under these conditions, if the foldable electronic device is dropped and the support base is subjected to an external impact force, the secondary swing arm will not slide downward relative to the support base because it is rotatably connected to the support base. The auxiliary swing arm is rotatably connected to the mounting component, and the mounting component is fixedly connected to the housing, so the mounting component and the housing will not slide downward relative to the auxiliary swing arm. However, because there is a gap between the supporting surface and the stop surface, the auxiliary swing arm will slide downward relative to the secondary swing arm. The mounting component and the housing will also slide downward together with the auxiliary swing arm until the stop surface and the supporting surface come into contact with each other.

[0020] After the stop surface and the supporting surface abut, the housing, the auxiliary swing arm of the mounting component, and the support base all stop sliding down, and the housing, mounting component, auxiliary swing arm, secondary swing arm, and support base are relatively fixed. The downward sliding distance of the housing and mounting component is equal to the width of the gap h1. The gap h1 is very small, therefore, the downward movement distance of the first and second display parts fixed to the two housings is very small, which can prevent wrinkles or even breakage at the connection between the first and third display parts, and also prevent wrinkles or even breakage at the connection between the second and third display parts, that is, prevent the display screen from being squeezed, and thus prevent the entire display screen from failing.

[0021] Of course, if the stop and support surfaces are already in contact before the foldable electronic device is dropped, the mounting and housing will not slide down, which will also prevent the display from being squeezed.

[0022] It is evident that the auxiliary swing arm serves two purposes: reducing the rotation angle of the secondary swing arm and supporting the mounting components. Furthermore, the auxiliary swing arm does not affect the normal operation of the rotating mechanism.

[0023] In some embodiments, the auxiliary swing arm is provided with a retaining notch, and the retaining surface includes the inner wall surface of the retaining notch; the stop surface includes the outer surface of the stop section; when the rotating mechanism is in a folded state, the stop section is located inside the retaining notch so that the retaining surface and the stop surface are opposite each other. The stop section extends into the retaining notch, which can not only play a stopping role, but also increase the structural compactness of the rotating mechanism.

[0024] In some embodiments, the auxiliary section is stacked on the mounting member along the thickness direction of the rotating mechanism; the main swing arm is located between the mounting member and the support base along the width direction of the rotating mechanism.

[0025] An auxiliary rotating hole is provided on the side of the mounting component away from the main swing arm, and an auxiliary rotating component is provided on the side of the auxiliary section away from the main swing arm. The auxiliary rotating component is rotatably connected to the auxiliary rotating hole. The auxiliary rotating component can be an arc-shaped plate, and the auxiliary rotating hole is an arc-shaped hole, with the arc-shaped contour of the auxiliary rotating hole located on a circle.

[0026] An auxiliary rotating cylinder is provided on the side of the auxiliary section facing the main swing arm, and a main rotating cylinder is provided on the side of the main swing arm facing the auxiliary section. The auxiliary rotating cylinder is rotatably connected to the main rotating cylinder. Specifically, a connecting shaft can be used to pass through the main rotating cylinder and the auxiliary rotating cylinder, and both the main rotating cylinder and the auxiliary rotating cylinder can rotate around the axis of the connecting shaft.

[0027] The secondary swing arm includes a secondary sliding part and a sliding connection mounting part for the secondary sliding part; the secondary sliding part and the auxiliary section are arranged at intervals along the length direction of the rotating mechanism; the secondary sliding part is provided with an auxiliary guide slide on the side facing the auxiliary section; the auxiliary section is provided with an auxiliary guide slide groove on the side facing the secondary sliding part; the auxiliary guide slide slides and is connected to the auxiliary guide slide groove.

[0028] It is understood that the main swing arm and the auxiliary swing arm are arranged at intervals along the length of the rotating mechanism, and the interval between the main swing arm and the auxiliary swing arm is very small. The auxiliary sliding part of the auxiliary swing arm is slidably connected to the mounting component. Using this structure, an auxiliary section is set up on the part opposite to the mounting component and the main swing arm. At this time, the auxiliary section and the auxiliary sliding part are spaced very small along the length of the rotating mechanism. Then, an auxiliary rotating component, an auxiliary rotating cylinder, and an auxiliary guide groove are set in the auxiliary section. This allows the auxiliary swing arm to be smoothly connected to the mounting component, the main swing arm, and the auxiliary swing arm, while maintaining the structural compactness of the rotating mechanism.

[0029] In some embodiments, the secondary sliding part is provided with a first support member, and the first support member and the auxiliary guide member are arranged at intervals along the length direction of the rotating mechanism. The auxiliary swing arm is provided with a second support member, and the second support member and the auxiliary guide groove are arranged at intervals along the length direction of the rotating mechanism. When the rotating mechanism is in the folded state, the first support member and the second support member abut against each other.

[0030] During the transition of the foldable electronic device from an unfolded state to a folded state, as the device approaches the folded position, the first and second support members slide and rotate in connection. Specifically, the convex arc-shaped surface of the first support member slides along the concave arc-shaped surface of the second support member. Because the secondary swing arm is relatively long, the first and second support members are positioned on the side furthest from the auxiliary guide and guide groove. This allows the secondary swing arm to rotate synchronously on both sides along the length of the rotating mechanism, preventing the side furthest from the auxiliary guide from not rotating fully. Furthermore, after the foldable electronic device is in the folded state, the second support member supports the secondary swing arm, increasing its stability and thus ensuring the foldable electronic device remains stable in the folded state.

[0031] In some embodiments, the secondary sliding part is provided with a retaining notch, which is located on the side of the auxiliary guide member away from the auxiliary section along the length direction of the rotating mechanism; the inner wall surface of the retaining notch includes a first side surface and a retaining surface; the auxiliary swing arm also includes a stop section, which is fixedly connected to the auxiliary section along the length direction of the rotating mechanism, and is stacked on the mounting member along the thickness direction of the rotating mechanism; the outer surface of the stop section includes an auxiliary end face and a stop surface; a first support member protrudes from the first side surface; a second support member protrudes from the auxiliary end face; when the rotating mechanism is in a folded state, the stop section is located inside the retaining notch, the stop surface and the retaining surface are opposite to each other along the width direction of the rotating mechanism, the first side surface and the auxiliary end face are opposite to each other along the length direction of the rotating mechanism, and the first support member and the second support member abut against each other.

[0032] The first support member and the abutment surface share the abutment notch, and the second support member and the stop surface share the stop section, which increases the structural compactness of the rotating mechanism. Furthermore, the supporting and guiding functions of the first and second support members allow for better fit between the stop surface and the abutment surface, preventing misalignment and ensuring the auxiliary swing arm's support function does not fail. This, in turn, prevents the mounting components and housing from sliding downwards, reducing the risk of damage to the display screen.

[0033] In some embodiments, the secondary sliding part is further provided with a first limiting member, which is located between the abutment notch and the auxiliary guide member; the mounting part is provided with a secondary sliding groove, the secondary sliding part is slidably connected to the secondary sliding groove, a first limiting protrusion is provided in the secondary sliding groove, the first limiting protrusion and the bottom surface of the secondary sliding groove cooperate to form a first limiting interval, and the first limiting member is located within the first limiting interval.

[0034] When the rotating mechanism switches between the unfolded and folded states, the first limiting member remains within the first limiting interval, which can prevent the secondary sliding part from disengaging from the secondary sliding groove.

[0035] In some embodiments, the mounting member has a second notch on the side away from the support base, and the second notch is connected to the secondary sliding groove along the width direction of the rotating mechanism; the auxiliary swing arm also includes a connecting section, which is connected between the auxiliary section and the stop section; the connecting section is located in the second notch, and the connecting section has an avoidance through hole; along the width direction of the rotating mechanism, the connecting section and the first limiting protrusion are opposite each other, and the avoidance through hole is connected to the secondary sliding groove; when the rotating mechanism is in the unfolded state, the first limiting member extends into the avoidance through hole.

[0036] The connecting section links the auxiliary section and the stop section, allowing the stop section to operate synchronously with the auxiliary section without requiring a separate connecting structure for the stop section. The connecting section is located within the second notch, increasing the structural compactness of the rotating mechanism. The connecting section includes a clearance through-hole to prevent interference with the operation of the secondary swing arm.

[0037] In some embodiments, the main swing arm includes two main rotating cylinders arranged at intervals along the length of the rotating mechanism; an auxiliary rotating cylinder is located within the interval between the two main rotating cylinders, and the auxiliary rotating cylinder and the two main rotating cylinders are rotatably connected via a connecting shaft. This can enhance the connection stability between the main swing arm and the auxiliary swing arm, and increase the structural compactness of the rotating mechanism.

[0038] In some embodiments, the mounting member has an auxiliary protrusion on the side facing the auxiliary swing arm; along the thickness direction of the rotating mechanism, an auxiliary rotation hole passes through the auxiliary protrusion and the side of the mounting member away from the auxiliary swing arm; The auxiliary swing arm has a guide opening, which faces the auxiliary rotating component along the width direction of the rotating mechanism. The auxiliary protrusion is located within the guide opening. By providing the auxiliary protrusion, the contact area between the auxiliary rotating hole and the auxiliary rotating component is increased in the direction surrounding the rotation axis of the auxiliary swing arm and the mounting component. This increases the reliability and stability of the connection between the auxiliary swing arm and the mounting component. The location of the auxiliary protrusion within the guide opening also increases the structural compactness of the rotating mechanism.

[0039] In some embodiments, the auxiliary section has a protrusion on the side facing the mounting member, and an auxiliary guide groove is disposed on the protrusion. The mounting member has a mounting through hole that extends through the mounting member along the thickness direction of the rotating mechanism. When the rotating mechanism is in a folded state, the protrusion is located within the mounting through hole. By providing the protrusion, sufficient space is provided in the auxiliary section for the auxiliary guide groove. The protrusion being located within the mounting through hole increases the structural compactness of the rotating mechanism.

[0040] In some embodiments, the auxiliary swing arm is provided with a first clearance notch and a second clearance notch. The first clearance notch is located in the auxiliary section, and the second clearance notch is located in the connecting section. The first clearance notch is used to avoid the main swing arm, and the second clearance notch is used to avoid the secondary swing arm. When the rotating mechanism switches between the unfolded state and the folded state, the main swing arm extends into the first clearance notch, and the secondary swing arm extends into the second clearance notch. That is, by providing the first and second clearance notches, the smooth operation of the rotating mechanism can be ensured.

[0041] In some embodiments, the auxiliary swing arm further includes a first bearing section and a second bearing section. The first bearing section is fixed to the end of the auxiliary section away from the connecting section, and the second bearing section is fixed to the end of the stop section away from the connecting section. The first bearing section, the auxiliary section, the connecting section, the stop section, and the second bearing section are sequentially fixedly connected. The upper surfaces of the first bearing section, the auxiliary section, the connecting section, the stop section, and the second bearing section can be used to support the display screen, thus eliminating the need for a separate component to support the display screen.

[0042] In some embodiments, the auxiliary section includes an auxiliary bearing portion and an auxiliary connecting portion. The auxiliary bearing portion is fixed between the first bearing section and the connecting section, and the auxiliary connecting portion is fixed on the side of the auxiliary bearing portion facing the mounting component. The auxiliary rotating component, the auxiliary rotating cylinder, and the auxiliary guide groove are all disposed in the auxiliary connecting portion.

[0043] In some embodiments, the auxiliary swing arm further includes a first bearing section and a second bearing section, which are respectively connected to both sides of the auxiliary section.

[0044] In some embodiments, the auxiliary swing arm further includes a connecting section and a stop section, and the first load-bearing section, the auxiliary load-bearing section, the connecting section, the stop section, and the second load-bearing section are sequentially and fixedly connected. The first load-bearing section, the auxiliary load-bearing section, the connecting section, the stop section, and the second load-bearing section can be integrally formed into a single component. This single component can be used to support the display screen, to act as a stop, and to reduce the rotation angle of the main swing arm.

[0045] In some embodiments, the rotating mechanism further includes a support plate, which is stacked on the mounting member along the thickness direction of the rotating mechanism. An auxiliary swing arm is located between the support plate and the mounting member. The support plate is rotatably connected to the mounting member, and the support plate and the mounting member are virtually rotatably connected. The support plate is slidably and rotatably connected to the main swing arm.

[0046] The second aspect of this application provides a foldable electronic device, including two housings and a rotating mechanism according to any one of the first aspects of this application. The rotating mechanism is disposed between the two housings and is connected to both housings respectively. The two housings can rotate relative to each other through the rotating mechanism. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0048] Figure 1 This is a schematic diagram of the foldable electronic device provided in this application in a folded state.

[0049] Figure 2 This is a schematic diagram of the unfolded state of the foldable electronic device provided in the embodiments of this application.

[0050] Figure 3 This is a schematic diagram of the main body of the foldable electronic device provided in the embodiments of this application.

[0051] Figure 4 This is a partial structural schematic diagram of the foldable electronic device provided in the embodiments of this application.

[0052] Figure 5 This is another partial structural schematic diagram of the foldable electronic device provided in the embodiments of this application.

[0053] Figure 6 This is a schematic diagram of the split structure of the rotating mechanism provided in the first embodiment of this application.

[0054] Figure 7 This is a schematic diagram of the rotating mechanism provided in the first embodiment of this application.

[0055] Figure 8 yes Figure 6 The diagram shows the structure of the support base for the rotating mechanism.

[0056] Figure 9 yes Figure 6 The diagram shows the structural structure of the mounting assembly of the rotating mechanism.

[0057] Figure 10 yes Figure 9 The diagram shows a structural schematic of the mounting components from another perspective.

[0058] Figure 11 yes Figure 6 A schematic diagram of the structure of the first swing arm assembly of the rotating mechanism shown.

[0059] Figure 12 yes Figure 11 The diagram shows a structural schematic of the first swing arm assembly from another perspective.

[0060] Figure 13 yes Figure 6 The diagram shows the structure of the second swing arm assembly of the rotating mechanism.

[0061] Figure 14 yes Figure 13 A structural schematic diagram of the second swing arm assembly shown from another perspective.

[0062] Figure 15 yes Figure 6 The diagram shows the structural schematic of the load-bearing component of the rotating mechanism.

[0063] Figure 16 yes Figure 15 The structural schematic diagram of the load-bearing component shown is from another perspective.

[0064] Figure 17 yes Figure 6 The diagram shows the structure of the auxiliary components of the rotating mechanism.

[0065] Figure 18 yes Figure 17 A structural schematic diagram of the auxiliary component shown from another perspective.

[0066] Figure 19 This is a schematic diagram of the rotating mechanism provided in the first embodiment of this application in its unfolded state.

[0067] Figure 20 yes Figure 19 The diagram shows a partial structural schematic of the rotating mechanism.

[0068] Figure 21 yes Figure 19 A schematic diagram of the AA-direction cross-section structure.

[0069] Figure 22 yes Figure 19 Schematic diagram of the BB-direction cross-section structure.

[0070] Figure 23 yes Figure 19 Schematic diagram of the CC-direction cross-section structure.

[0071] Figure 24 yes Figure 19 Schematic diagram of the DD-direction cross-section structure.

[0072] Figure 25 yes Figure 19 Schematic diagram of the EE cross-section structure.

[0073] Figure 26 This is a schematic diagram of the rotating mechanism provided in the first embodiment of this application in a semi-expanded state.

[0074] Figure 27 This is a schematic diagram of the rotating mechanism provided in the first embodiment of this application in a folded state.

[0075] Figure 28 yes Figure 21 The cross-sectional view shown is a schematic diagram illustrating the process of switching from the unfolded state to the folded state.

[0076] Figure 29 yes Figure 22 The cross-sectional view shown is a schematic diagram illustrating the process of switching from the unfolded state to the folded state.

[0077] Figure 30 yes Figure 23 The cross-sectional view shown is a schematic diagram illustrating the process of switching from the unfolded state to the folded state.

[0078] Figure 31 This is a schematic diagram of the cooperation process between the first support member and the second support member when the rotating mechanism provided in the first embodiment of this application switches from the unfolded state to the folded state.

[0079] Figure 32 This is a partial structural diagram of the rotating mechanism provided in the first embodiment of this application in a folded state.

[0080] Figure 33 This is a simplified schematic diagram of a partial structure of the rotating mechanism provided in the first embodiment of this application.

[0081] Figure 34 This is a simplified schematic diagram of a partial structure of a rotating mechanism in related technologies.

[0082] Figure 35 This is a schematic diagram of the movement space of the main swing arm when the rotation mechanism provided in the first embodiment of this application switches from the unfolded state to the folded state.

[0083] Figure 36 This is a schematic diagram of the cooperation process between the stop surface and the supporting surface when the rotating mechanism provided in the first embodiment of this application switches from the unfolded state to the folded state.

[0084] Figure 37 yes Figure 32 A magnified structural diagram at point A in the diagram.

[0085] Figure 38 This is a schematic diagram showing the stop surface and the abutment surface facing each other when the rotating mechanism provided in the first embodiment of this application is in a folded state.

[0086] Figure 39 This is a schematic diagram from another perspective showing the stop surface and the abutment surface facing each other when the rotating mechanism provided in the first embodiment of this application is in a folded state.

[0087] Figure 40 This is a diagram showing the state changes of the rotating mechanism provided in the first embodiment of this application when it is in a folded state and subjected to an external impact force.

[0088] Figure 41 This is a diagram showing the state changes of a foldable electronic device in the related technology when it is folded and subjected to an external impact force.

[0089] Figure 42 This is a diagram showing the state changes of a foldable electronic device in another related technology when it is folded and subjected to an external impact force.

[0090] Figure 43 yes Figure 20 The diagram shows a partial structural schematic of the rotating mechanism.

[0091] Figure 44 This is a schematic diagram of the structure of the auxiliary swing arm, including a first part and a second part, in the rotating mechanism provided in the first embodiment of this application.

[0092] Figure 45 This is a schematic diagram of the split structure of the rotating mechanism provided in the second embodiment of this application.

[0093] Figure 46 This is a schematic diagram of the rotating mechanism provided in the second embodiment of this application.

[0094] Figure 47 yes Figure 45The diagram shows the structure of the support base for the rotating mechanism.

[0095] Figure 48 yes Figure 45 The diagram shows the structural design of the mounting components for the rotating mechanism.

[0096] Figure 49 yes Figure 45 The diagram shows a structural schematic of the mounting component of the rotating mechanism from another perspective.

[0097] Figure 50 yes Figure 45 The diagram shows the structure of the main swing arm of the rotating mechanism.

[0098] Figure 51 yes Figure 45 The diagram shows the structure of the auxiliary swing arm of the rotating mechanism.

[0099] Figure 52 yes Figure 45 The diagram shows the structure of the auxiliary swing arm of the rotating mechanism.

[0100] Figure 53 yes Figure 52 The diagram shows another view of the auxiliary swing arm.

[0101] Figure 54 This is a schematic diagram of the rotating mechanism provided in the second embodiment of this application in its unfolded state.

[0102] Figure 55 yes Figure 54 The diagram shows a partial structural schematic of the rotating mechanism.

[0103] Figure 56 This is a schematic diagram of the rotating mechanism in a semi-expanded state provided in the second embodiment of this application.

[0104] Figure 57 This is a schematic diagram of the rotating mechanism in a folded state provided in the second embodiment of this application.

[0105] Figure 58 This is a partial structural diagram of the rotating mechanism provided in the second embodiment of this application in a folded state.

[0106] Figure 59 This is a schematic diagram of the process of the auxiliary active member and the auxiliary active hole cooperating when the rotating mechanism provided in the second embodiment of this application switches from the unfolded state to the folded state.

[0107] Figure 60 This is a schematic diagram of the process by which the auxiliary rotating cylinder and the main rotating cylinder rotate around the connecting shaft when the rotating mechanism provided in the second embodiment of this application switches from the unfolded state to the folded state.

[0108] Figure 61 This is a schematic diagram of the process of the auxiliary guide slide and the auxiliary guide slide groove cooperating when the rotating mechanism provided in the second embodiment of this application switches from the unfolded state to the folded state.

[0109] Figure 62 This is a schematic diagram of the cooperation process between the stop surface and the supporting surface when the rotating mechanism provided in the second embodiment of this application switches from the unfolded state to the folded state.

[0110] Figure 63 This is a schematic diagram showing the stop surface and the abutment surface facing each other when the rotating mechanism provided in the second embodiment of this application is in a folded state. Detailed Implementation

[0111] The embodiments of this application are described below with reference to the accompanying drawings.

[0112] This application provides a foldable electronic device, including but not limited to cellphones, notebook computers, tablet computers, personal digital assistants, wearable devices, and mobile devices. In some embodiments, a foldable phone is used as an example for illustration.

[0113] Foldable phones include horizontal foldable phones and vertical foldable phones. Typically, foldable phones are rectangular in shape. A horizontal foldable phone folds along its width, reducing its width to half its unfolded size. A vertical foldable phone folds along its length, reducing its length to half its unfolded size.

[0114] Generally, horizontally foldable phones are mostly large-screen phones, also known as large-screen phones. Here, "large-screen" means that when horizontally foldable phones are unfolded, the screen area is approximately twice the size of a traditional smartphone screen. Vertically foldable phones are mostly small-screen phones, also known as small-screen phones. When vertically foldable phones are unfolded, the screen area is roughly the same as a traditional smartphone screen. Of course, the screen area of ​​a horizontally foldable phone can also be the same as that of a traditional smartphone screen, or a multiple of it, such as 1.5 times, 2.1 times, or 2.5 times, etc. The screen area of ​​a vertically foldable phone can also be 1.2 times, 1.5 times, or 2 times, etc., the size of a traditional smartphone screen. This embodiment uses a horizontally foldable phone as an example for explanation.

[0115] Please see Figure 1 and Figure 2 This application provides an electronic device. Figure 1 This is a schematic diagram of the foldable electronic device 1000 provided in this application in a folded state. Figure 2 This is a schematic diagram of the unfolded state of the foldable electronic device 1000 provided in the embodiments of this application. Figure 1 The foldable electronic device 1000 shown has a folding angle of approximately 0 degrees. Figure 2 The unfolding angle of the foldable electronic device 1000 shown is approximately 180 degrees. For ease of description, the width direction of the foldable electronic device 1000 is defined as the X direction, the length direction as the Y direction, and the thickness direction as the Z direction. The X, Y, and Z directions are all perpendicular to each other.

[0116] It should be noted that the directional terms such as "top," "bottom," "left," "right," "front," and "rear" used in the description of the foldable electronic device 1000 in this application are mainly based on the attached diagram of the foldable electronic device 1000. Figure 2 as well as Figure 4 The orientation of the device is described in the diagram, with the positive Z-axis direction as "top" or "up", the negative Z-axis direction as "bottom" or "down", the positive X-axis direction as "right", the negative X-axis direction as "left", the negative Y-axis direction as "back", and the positive Y-axis direction as "front". This does not constitute a limitation on the orientation of the foldable electronic device 1000 in actual application scenarios.

[0117] A foldable electronic device 1000 includes a main body 1100 and a display screen 1300, the display screen 1300 being mounted on the main body 1100. The display screen 1300 can be a flexible screen, and includes a display surface and a mounting surface, which are positioned opposite to each other. The display surface is used to display text, images, and videos, etc. The display screen 1300 includes a first display unit 1310, a second display unit 1320, and a third display unit 1330. The third display unit 1330 is located between the first display unit 1310 and the second display unit 1320.

[0118] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of the main body 1100 of the foldable electronic device 1000 provided in the embodiments of this application.

[0119] The main body 1100 includes two housings 1200 and a rotating mechanism 100. The housing 1200 may include a middle frame (not shown) and a back cover (not shown). The middle frame has a receiving space (not shown) for accommodating devices such as batteries (not shown) and circuit boards (not shown). The back cover is fixedly connected to the middle frame and can close the receiving space to prevent the batteries and circuit boards from being exposed.

[0120] The two housings 1200 are a first housing 1210 and a second housing 1220, respectively. A rotating mechanism 100 is disposed between the first housing 1210 and the second housing 1220. The rotating mechanism 100 is connected to the first housing 1210 and the second housing 1220 respectively to realize the rotating connection between the first housing 1210 and the second housing 1220. The first housing 1210 and the second housing 1220 can rotate relative to each other through the rotating mechanism 100, so that the main body 1100 can switch between a folded state and an unfolded state.

[0121] The display screen 1300 is mounted on the main body 1100, and the mounting surface is fixedly connected to the main body 1100. Specifically, the first housing 1210 carries the first display unit 1310, and the second housing 1220 carries the second display unit 1320. The rotating mechanism 100 is disposed opposite to the third display unit 1330.

[0122] See Figure 2 and Figure 3 The first housing 1210 and the second housing 1220 rotate relative to each other via the rotating mechanism 100. When the foldable electronic device 1000 is in the unfolded state, the display screen 1300 has a large display area, enabling the foldable electronic device 1000 to display and operate on a large screen, thus improving the user experience. (See also...) Figure 1 When the foldable electronic device 1000 is in the folded state, the display screen 1300 is located between the first housing 1210 and the second housing 1220. The first housing 1210 and the second housing 1220 protect the display surface of the display screen 1300, which can greatly reduce the probability of the display screen 1300 being damaged, and the overall size is reduced, making it easier to carry. It can be understood that when the rotating mechanism 100 is in the folded state, the foldable electronic device 1000 is in the folded state; when the rotating mechanism 100 is in the unfolded state, the foldable electronic device 1000 is in the unfolded state.

[0123] refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a partial structural schematic diagram of the foldable electronic device 1000 provided in an embodiment of this application. Figure 5 This is another partial structural schematic diagram of the foldable electronic device 1000 provided in the embodiments of this application. Figure 6This is a schematic diagram of the split structure of the rotating mechanism 100 provided in the first embodiment of this application. The rotating mechanism 100 includes a support base 10, a mounting assembly 20, a first swing arm assembly 30, a second swing arm assembly 40, a load-bearing assembly 50, an auxiliary assembly 60, a synchronizing element 70, and a damping assembly 80. There can be one or more second swing arm assemblies 40 and first swing arm assemblies 30.

[0124] The mounting assembly 20 includes two mounting members 21, both of which can be wedge-shaped blocks. The two mounting members 21 are designated as a first mounting member 21a and a second mounting member 21b. A first receiving cavity 1211 is provided on the side of the first housing 1210 facing the second housing 1220, and a second receiving cavity 1221 is provided on the side of the second housing 1220 facing the first housing 1210. A support base 10 is disposed between the first housing 1210 and the second housing 1220. The first mounting member 21a and the second mounting member 21b are respectively fixed within the first receiving cavity 1211 and the second receiving cavity 1221. Figure 4 and Figure 5 Only the portion of the first housing 1210 with the first receiving cavity 1211 and the portion of the second housing 1220 with the second receiving cavity 1221 are shown. The remaining portions of the first housing 1210 and the second housing 1220 are not shown. In reality, the first housing 1210 extends a considerable length away from the second housing 1220 (e.g., Figure 2 As shown in the diagram), the second housing 1220 will also extend a longer length away from the first housing 1210 (as shown in the diagram). Figure 2 As shown in the image).

[0125] It is understood that the first receiving cavity 1211 is disposed in the middle frame of the first housing 1210, and the first receiving cavity 1211 is located on the side of the middle frame of the first housing 1210 away from its receiving space, that is, the first receiving cavity 1211 is located on the side of the middle frame away from the back cover. Furthermore, the receiving space of the middle frame of the first housing 1210 and the first receiving cavity 1211 are completely offset along the X-axis. Similarly, the second receiving cavity 1221 is disposed in the middle frame of the second housing 1220, and the second receiving cavity 1221 is located on the side of the middle frame of the second housing 1220 away from its receiving space, that is, the second receiving cavity 1221 is located on the side of the middle frame away from the back cover. Furthermore, the receiving space of the middle frame of the second housing 1220 and the second receiving cavity 1221 are completely offset along the X-axis. The first receiving cavity 1211 and the second receiving cavity 1221 are only used to receive the rotating mechanism 100, and do not include receiving space for components such as batteries and circuit boards.

[0126] The first swing arm assembly 30 includes two main swing arms 31, namely a first main swing arm 31a and a second main swing arm 31b. The second swing arm assembly 40 includes two auxiliary swing arms 41, namely a first auxiliary swing arm 41a and a second auxiliary swing arm 41b. The bearing assembly 50 includes two bearing plates 51, namely a first bearing plate 51a and a second bearing plate 51b. The auxiliary assembly 60 includes two auxiliary swing arms 61, namely a first auxiliary swing arm 61a and a second auxiliary swing arm 61b.

[0127] The main swing arm 31 is connected to the support base 10, the mounting member 21, the bearing plate 51, and the auxiliary swing arm 61. The first main swing arm 31a is connected to the first bearing plate 51a and the first auxiliary swing arm 61a, and the second main swing arm 31b is connected to the second bearing plate 51b and the second auxiliary swing arm 61b. The secondary swing arm 41 is connected to the support base 10, the mounting member 21, and the auxiliary swing arm 61. The first secondary swing arm 41a is connected to the first mounting member 21a and the first auxiliary swing arm 61a, and the second secondary swing arm 41b is connected to the second mounting member 21b and the second auxiliary swing arm 61b. The bearing plate 51 is stacked on the mounting member 21 and is connected to the mounting member 21 and the main swing arm 31. The first bearing plate 51a is connected to the first mounting member 21a and the first main swing arm 31a, and the second bearing plate 51b is connected to the second mounting member 21b and the second main swing arm 31b. An auxiliary swing arm 61 is connected to the main swing arm 31, the secondary swing arm 41, and the mounting member 21. The first auxiliary swing arm 61a is connected to the first main swing arm 31a, the first secondary swing arm 41a, and the first mounting member 21a. The second auxiliary swing arm 61b is connected to the second main swing arm 31b, the second secondary swing arm 41b, and the second mounting member 21b. A synchronizing element 70 is mounted on the support base 10, and a damping assembly 80 is mounted on the support base 10.

[0128] The main swing arm 31, the secondary swing arm 41, and the auxiliary swing arm 61 enable the first housing 1210 and the second housing 1220 to rotate relative to the support base 10, allowing the foldable electronic device 1000 to switch between an unfolded and a folded state. The upper surface of the carrier plate 51 and the upper surface of the support base 10 support the display screen 1300, ensuring that the display screen 1300 remains flat in the unfolded state. When the rotating mechanism 100 switches between the unfolded and folded states, the auxiliary swing arm 61 also assists the main swing arm 31 in reducing the rotation angle, thereby reducing the overall rotation angle of the rotating mechanism 100. The rotation angle of the secondary swing arm 41 is correspondingly reduced, which can reduce the wall thickness of the secondary swing arm 41, preventing the secondary swing arm 41 from being exposed when the rotating mechanism 100 is in the folded state. It also increases the flatness of the upper surface of the support base 10, allowing the support base 10 to better support the display screen 1300 when the rotating mechanism 100 is in the unfolded state, ensuring the flatness of the display screen 1300. Synchronizer 70 is used to synchronize the operation of the first housing 1210 and the second housing 1220, and damping assembly 80 is used to provide damping force during the operation of the first housing 1210 and the second housing 1220.

[0129] refer to Figure 7 , Figure 7 This is a schematic diagram of the rotating mechanism 100 provided in the first embodiment of this application. The main swing arm 31 is rotatably connected to the support base 10, and the main swing arm 31 and the support base 10 are virtually rotatably connected. The main swing arm 31 is rotatably connected to the auxiliary swing arm 61, and the main swing arm 31 is slidably and rotatably connected to the mounting member 21. The auxiliary swing arm 41 is rotatably connected to the support base 10, and the auxiliary swing arm 41 is slidably and rotatably connected to the mounting member 21. The auxiliary swing arm 61 is rotatably connected to the main swing arm 31, and the auxiliary swing arm 61 is slidably and rotatably connected to the auxiliary swing arm 41, and the auxiliary swing arm 61 is rotatably connected to the mounting member 21. The bearing plate 51 is slidably and rotatably connected to the mounting member 21, and the bearing plate 51 is slidably and rotatably connected to the main swing arm 31.

[0130] refer to Figure 8 , Figure 8 yes Figure 6The diagram shows the structure of the support base 10 of the rotating mechanism 100. The support base 10 includes a shaft cover 11 and a support plate 12. The shaft cover 11 is arc-shaped. Concave arc-shaped receiving grooves 13 and convex arc-shaped surfaces 14 are formed on opposite sides of the shaft cover 11 along the Z-axis. When the foldable electronic device 1000 is in a folded state, the convex arc-shaped surface 14 is part of the external surface of the rotating mechanism 100. The receiving groove 13 includes a main rotating groove 15 and a secondary rotating groove 16 arranged along the Y-axis. The bottom surface of the main rotating groove 15 is a concave arc-shaped surface. The main rotating groove 15 is used to connect the main swing arm 31, and the secondary rotating groove 16 is used to connect the secondary swing arm 41. Two mounting shafts are provided in the secondary rotating groove 16, namely a first mounting shaft 17 and a second mounting shaft 18. Along the X-axis, the first mounting shaft 17 and the second mounting shaft 18 are arranged at intervals, and the axial directions of both the first mounting shaft 17 and the second mounting shaft 18 are parallel to the Y-axis direction. The first mounting shaft 17 and the second mounting shaft 18 are used to connect the first auxiliary swing arm 41a and the second auxiliary swing arm 41b, respectively. Along the Z-axis direction, the support plate 12 is stacked and fixed to the shaft cover 11, and covers the receiving groove 13. The lower surface of the support plate 12 faces the shaft cover 11, and the upper surface of the support plate 12 is used to support the display screen 1300.

[0131] It is understood that a first notch (not shown in the figure) is provided at the position opposite to the support plate 12 and the main rotating groove 15. The first notch penetrates the upper and lower surfaces of the support plate 12 and is used to avoid the main swing arm 31. A second notch (not shown in the figure) is provided at the position opposite to the support plate 12 and the auxiliary rotating groove 16. The second notch penetrates the upper and lower surfaces of the support plate 12 and is used to avoid the auxiliary swing arm 41. The support plate 12 is also provided with a main limiting protrusion 19. Along the Z-axis direction, the main limiting protrusion 19 and the bottom wall surface of the main rotating groove 15 are spaced apart and opposite each other. The surface of the main limiting protrusion 19 facing the main rotating groove 15 is a convex arc surface. The main limiting protrusion 19 is used to limit the main swing arm 31 and prevent the main swing arm 31 from detaching from the main rotating groove 15.

[0132] refer to Figure 9 and Figure 10 , Figure 9 yes Figure 6 A schematic diagram of the mounting assembly 20 of the rotating mechanism 100 shown. Figure 10 yes Figure 9 A structural schematic diagram of the mounting component 20 shown from another perspective.

[0133] Mounting assembly 20 includes two mounting members 21, namely a first mounting member 21a and a second mounting member 21b. The mounting members 21 are generally rectangular plates, with their length, width, and height directions corresponding to the Y-axis, X-axis, and Z-axis, respectively. Furthermore, the thickness of the mounting member 21 gradually decreases from the side furthest from the support base 10 to the side closest to the support base 10; that is, the mounting member 21 can be a wedge-shaped block. In the following text, the upper and lower surfaces of the mounting member 21 refer to the two opposite faces of the mounting member 21 along the Z-axis, and the side faces of the mounting member 21 refer to the two opposite faces of the mounting member 21 along the X-axis.

[0134] Mounting component 21 is provided with a main sliding hole 22, a secondary sliding groove 23, an auxiliary rotating hole 24, a mounting through hole 25, and a load-bearing guide hole 26. The main sliding hole 22 is used to connect the main swing arm 31, the secondary sliding groove 23 is used to connect the secondary swing arm 41, the auxiliary rotating hole 24 is used to connect the auxiliary swing arm 61, the mounting through hole 25 is used to accommodate a part of the auxiliary swing arm 61, and the load-bearing guide hole 26 is used to connect the support plate 51. Along the Y-axis direction, there can be two load-bearing guide holes 26, which are located at opposite ends of the mounting component 21 along the Y-axis direction. The main rotating groove 15, the mounting through hole 25, and the secondary sliding groove 23 are arranged sequentially at intervals along the Y-axis direction, and each of the main rotating groove 15, the mounting through hole 25, and the secondary sliding groove 23 is located between two load-bearing guide holes 26. There are two auxiliary rotating holes 24, which are arranged at intervals along the Y-axis. The two auxiliary rotating holes 24 are the first rotating hole 241 and the second rotating hole 242, respectively. The first rotating hole 241 is located between the main sliding hole 22 and the mounting through hole 25, and the second rotating hole 242 is connected to the auxiliary sliding groove 23 along the Z-axis.

[0135] The main sliding hole 22, auxiliary rotating hole 24, mounting through hole 25, and bearing guide hole 26 all penetrate the mounting member 21 along the Z-axis direction. It can be understood that the upper surface of the mounting member 21 has multiple protrusions 27, which increase the thickness of the mounting member 21. The multiple protrusions 27 include a main protrusion 271, two auxiliary protrusions 272, and a bearing protrusion 273. The main protrusion 271 is located at the position where the main sliding hole 22 is located on the mounting member 21. The main sliding hole 22 penetrates the main protrusion 271 along the Z-axis direction, resulting in a longer extension length of the main sliding hole 22, which can prevent the main swing arm 31 from detaching from the mounting member 21. The two auxiliary protrusions 272 are respectively located at the positions where the two auxiliary rotating holes 24 are located on the mounting member 21. Along the Z-axis direction, the two auxiliary rotating holes 24 penetrate the two auxiliary protrusions 272 respectively, resulting in a longer inner wall surface of the auxiliary rotating holes 24, which can prevent the auxiliary swing arm 61 from detaching from the mounting member 21. The bearing protrusion 273 is located at the position where the mounting part 21 has the bearing guide hole 26. The bearing guide hole 26 passes through the bearing protrusion 273 along the Z-axis direction, so that the extension length of the bearing guide hole 26 is relatively long, which can prevent the bearing plate 51 and the mounting part 21 from separating.

[0136] The inner wall surface of the main sliding hole 22 is a plane extending obliquely along the Z-axis. Specifically, the main sliding hole 22 of the first mounting member 21a extends from the upper left to the lower right, and the main sliding hole 22 of the second mounting member 21b extends from the upper right to the lower left. The inner wall surfaces of the auxiliary rotating hole 24 and the bearing guide hole 26 are both concave arc surfaces, and the inner wall surface of the auxiliary rotating hole 24 is a part of the inner wall surface of the circle in which the auxiliary rotating hole 24 is located. The inner wall surface of the bearing guide hole 26 of the first mounting member 21a extends from the upper right to the lower left, and the inner wall surface of the bearing guide hole 26 of the second mounting member 21b extends from the upper left to the lower right.

[0137] The secondary sliding groove 23 is recessed on the upper surface of the mounting member 21, and also extends through two opposite sides of the mounting member 21 along the X-axis. The mounting member 21 is also provided with secondary limiting protrusions 231, two in total, both of which are used to prevent the secondary swing arm 41 from disengaging from the secondary sliding groove 23. The two secondary limiting protrusions 231 are a first limiting protrusion 232 and a second limiting protrusion 233. The first limiting protrusion 232 protrudes from the bottom surface of the secondary sliding groove 23, and includes a connecting section 234 and a limiting section 235. One end of the connecting section 234 is fixed to the bottom surface of the secondary sliding groove 23, and the limiting section 235 is fixed to the other end of the connecting section 234, and a first limiting gap 236 is formed between the limiting section 235 and the bottom surface of the secondary sliding groove 23. The second limiting protrusion 233 protrudes from the upper surface of the mounting member 21 and extends upward toward the secondary sliding groove 23. A second limiting interval 237 is formed between the bottom surface of the second limiting protrusion 233 and the bottom surface of the secondary sliding groove 23. Both the first limiting interval 236 and the second limiting interval 237 are used to limit the secondary swing arm 41 and prevent the secondary swing arm 41 from disengaging from the secondary sliding groove 23.

[0138] Mounting member 21 is also provided with a first notch 28 and a second notch 29. The first notch 28 penetrates the upper and lower surfaces of mounting member 21 and also penetrates the side of mounting member 21 facing the support base 10. Along the X-axis, the first notch 28 communicates with the main sliding hole 22 and is used to mate with the main swing arm 31. The second notch 29 penetrates the bottom surface of the auxiliary sliding groove 23 and the lower surface of mounting member 21 and also penetrates the side of mounting member 21 away from the support base 10. The second notch 29 is used to mate with the auxiliary swing arm 61 to increase the structural compactness of the rotating mechanism 100.

[0139] refer to Figure 11 and Figure 12 , Figure 11 yes Figure 6 A schematic diagram of the structure of the first swing arm assembly 30 of the rotating mechanism 100 shown. Figure 12 yes Figure 11 The diagram shows a structural schematic of the first swing arm assembly 30 from another perspective. The first swing arm assembly 30 includes two connecting shafts 32 and two main swing arms 31, namely a first main swing arm 31a and a second main swing arm 31b. The two connecting shafts 32 are also respectively the first connecting shaft 32a and the second connecting shaft 32b. Each main swing arm 31 includes a main rotating part 33 and a main sliding part 34. Figure 11The main rotating part 33 and the main sliding part 34 are divided by dashed lines. The main rotating part 33 and the main sliding part 34 are fixedly connected along the X-axis. A portion of the lower surface of the main sliding part 34 is a convex arc-shaped surface. The main sliding part 34 is provided with main limiting members 35 on opposite sides along the Y-axis. The main limiting members 35 are arc-shaped plates. The upper surface of the main limiting members 35 is a concave arc-shaped surface, and the lower surface of the main limiting members 35 is a convex arc-shaped surface. The main limiting members 35 are used to cooperate with the main limiting protrusion 19 of the support base 10 to prevent the main swing arm 31 from disengaging from the main rotating groove 15.

[0140] The main rotating part 33 includes two main rotating cylinders 36 spaced apart and opposite each other along the Y-axis. The space between the two main rotating cylinders 36 is a mounting space 37, which is used to mount a portion of the auxiliary swing arm 61. Each main rotating cylinder 36 has a main rotating hole 38 that extends through it along the Y-axis. A connecting shaft 32 is rotatably connected to the main rotating hole 38. The portion of the connecting shaft 32 located between the two main rotating cylinders 36 is used to connect with the auxiliary swing arm 61, thus enabling a rotatable connection between the main swing arm 31 and the auxiliary swing arm 61. A portion of the connecting shaft 32 extends out of the main rotating hole 38, and this extended portion is located on the side of one of the main rotating cylinders 36 opposite to the mounting space 37. This extended portion of the connecting shaft 32 is used to connect with the auxiliary swing arm 61.

[0141] Along the X-axis, the main rotating part 33 is also provided with an extension 39 on the side away from the main sliding part 34. Figure 11 The main rotating part 33 and the extension 39 are divided by a dashed line. The extension 39 has a main guide slide 391 on the side away from the main rotating part 33. The main guide slide 391 is in the shape of a round rod. The main guide slide 391 is used to connect with the mounting part 21 so that the main swing arm 31 and the mounting part 21 are slidably and rotatably connected.

[0142] refer to Figure 13 and Figure 14 , Figure 13 yes Figure 6 A schematic diagram of the structure of the second swing arm assembly 40 of the rotating mechanism 100 shown. Figure 14 yes Figure 13 The diagram shows a structural schematic of the second swing arm assembly 40 from another perspective. The second swing arm assembly 40 includes two auxiliary swing arms 41, namely a first auxiliary swing arm 41a and a second auxiliary swing arm 41b. Each auxiliary swing arm 41 includes a secondary rotating part 42 and a secondary sliding part 43 fixedly connected along the X-axis direction.

[0143] The auxiliary rotating part 42 includes two auxiliary rotating cylinders 44, which are arranged at intervals along the Y-axis. Each auxiliary rotating cylinder 44 is provided with an auxiliary rotating hole 45, which extends through the auxiliary rotating cylinder 44 along the Y-axis and is used to connect with a mounting shaft.

[0144] The secondary sliding portion 43 is provided with a retaining notch 46 and a secondary limiting member 47, which are spaced apart along the Y-axis. A portion of the inner wall surface of the retaining notch 46 is a retaining surface 48, which is parallel to the plane formed by the Z-axis and Y-axis directions. The retaining notch 46 penetrates the secondary sliding portion 43 along the Z-axis and also penetrates the side of the secondary sliding portion 43 away from the secondary rotating portion 42. The inner wall surface of the retaining notch 46 includes a first side surface 461, a second side surface 462, and a third side surface 463. Along the Y-axis, the first side surface 461 and the second side surface 462 are spaced apart and opposite each other, and the third side surface 463 connects between the first side surface 461 and the second side surface 462. The third side surface 463 and the opening of the retaining notch 46 are opposite each other along the X-axis, and the third side surface 463 forms the aforementioned retaining surface 48. The secondary limiting member 47 is formed by a downward recess on the upper surface of the secondary sliding part 43. There are three secondary limiting members 47, including two first limiting members 471 and one second limiting member 472. The first limiting members 471 and the second limiting members 472 are located on both sides of the abutment notch 46 along the Y-axis direction, and a clearance gap is provided between the two first limiting members 471. The first limiting members 471 are used to cooperate with the first limiting interval 236 of the mounting member 21, and the second limiting member 472 is used to cooperate with the second limiting interval 237 of the mounting member 21. The clearance gap is used to avoid the connecting section 234 of the first limiting protrusion, thereby preventing the secondary swing arm 41 from disengaging from the secondary sliding groove 23.

[0145] The secondary sliding part 43 is also provided with an auxiliary guide cylinder 431, which is located on the side of the first limiting member 471 away from the abutment notch 46. The auxiliary guide cylinder 431 has a through hole 432, and an auxiliary guide member 433 is fixed in the through hole 432. The auxiliary guide member 433 is in the shape of a round rod. At least a portion of the auxiliary guide member 433 extends out of the through hole 432, and the auxiliary guide member 433 is located on the side of the auxiliary guide cylinder 431 away from the first limiting member 471. A first support member 49 is protruding from the first side surface 461 of the abutment notch 46. The first support member 49 has a convex arc-shaped surface. Both the auxiliary guide member 433 and the first support member 49 are used to connect with the auxiliary swing arm 61. In some other embodiments, the through hole 432 may be omitted, and the auxiliary guide member 433 and the secondary sliding part 43 may be integrally formed.

[0146] refer to Figure 15 and Figure 16 , Figure 15 yes Figure 6 A schematic diagram of the structure of the bearing component 50 of the rotating mechanism 100 shown. Figure 16 yes Figure 15 The diagram shows a structural schematic of the support assembly 50 from another perspective. The support assembly 50 includes two support plates 51, which are a first support plate 51a and a second support plate 51b, respectively.

[0147] The support plate 51 is generally rectangular. The upper and lower surfaces of the support plate 51 refer to two opposite surfaces along the Z-axis. The upper surface of the support plate 51 supports the display screen 1300. The lower surface of the support plate 51 has a second first support guide 52 and a second support guide 53 protruding from it. The two first support guides 52 are located on opposite sides of the lower surface of the support plate 51 along the Y-axis, and the second support guide 53 is located between the two first support guides 52. The first support guide 52 is arc-shaped and is used to connect with the support guide hole 26 of the mounting member 21. In other embodiments, the number of first support guides 52 may be one, three, or four, etc., and this application does not impose specific limitations. The second support guide 53 has a connecting guide hole 54 that penetrates the second support guide 53 along the Y-axis and is used to connect with the main swing arm 31. It is understood that in some other embodiments, the connecting guide hole 54 may not penetrate through the second bearing guide member 53, but may be recessed in one side of the second bearing guide member 53.

[0148] refer to Figure 17 and Figure 18 , Figure 17 yes Figure 6 A schematic diagram of the auxiliary component 60 of the rotating mechanism 100 shown in the figure. Figure 18 yes Figure 17 The diagram shows another structural view of the auxiliary component 60. The auxiliary component 60 includes two auxiliary swing arms 61, namely a first auxiliary swing arm 61a and a second auxiliary swing arm 61b. Each auxiliary swing arm 61 includes an auxiliary section 611, a connecting section 612, and a stop section 613 connected sequentially along the Y-axis. Figure 17 The boundaries of the auxiliary section 611, connecting section 612, and stop section 613 are indicated by dashed lines. Along the X-axis, the width of the auxiliary section 611 is greater than the width of the connecting section 612, and the width of the stop section 613 is greater than the width of the auxiliary section 611.

[0149] The auxiliary section 611, the connecting section 612 and the stop section 613 all include a first side and a second side that are opposite to each other along the X-axis direction. The first side of the auxiliary section 611, the first side of the connecting section 612 and the first side of the stop section 613 are basically flush.

[0150] The auxiliary swing arm 61 is provided with two auxiliary rotating parts 62, multiple guide openings 63, an auxiliary rotating cylinder 64, an auxiliary guide groove 65, a stop surface 66, a second support part 67, and an avoidance through hole 68.

[0151] Two auxiliary rotating components 62 are located on both sides of the auxiliary swing arm 61 along the Y-axis. Specifically, the two auxiliary rotating components 62 are respectively disposed on the auxiliary section 611 and the supporting section, and are connected to the two auxiliary rotating holes 24 of the mounting component 21. Both auxiliary rotating components 62 are arc-shaped plates, with a concave arc surface on one side and a convex arc surface on the other side. The two auxiliary rotating components 62 are the first rotating component 621 and the second rotating component 622. Along the Y-axis, the first rotating component 621 and the second rotating component 622 are located on both sides of the auxiliary swing arm 61 along the Y-axis. The first rotating component 621 is disposed on the first side of the auxiliary section 611, and the second rotating component 622 is disposed on the first side of the supporting section.

[0152] Along the X-axis, the guide opening 63 and the auxiliary rotating member 62 are opposite each other. Specifically, a portion of the convex arc surface of the auxiliary rotating member 62 is also a portion of the inner wall surface of the guide opening 63. There are three guide openings 63, two of which are located in the auxiliary section 611 and are opposite to the first rotating member 621. The third guide opening 63 is located in the abutment section and is opposite to the second rotating member 622. The guide openings 63 are used to cooperate with the protrusions 27 of the mounting member 21 to increase the reliability of the connection between the auxiliary swing arm 61 and the mounting member 21. The guide openings 63 penetrate the auxiliary swing arm 61 along the Z-axis. It can be understood that two of the guide openings 63 are located on both sides of the auxiliary swing arm 61 along the Y-axis, and these two guide openings 63 can also penetrate the two opposite sides of the auxiliary swing arm 61 along the Y-axis.

[0153] An auxiliary rotating cylinder 64 is disposed on the second side of the auxiliary section 611 and is used to connect with the main swing arm 31. The auxiliary rotating cylinder 64 is provided with a connecting through hole 641, and the axial direction of the auxiliary rotating cylinder 64 is parallel to the Y-axis direction. The connecting through hole 641 is used to connect with the main swing arm 31 through a connecting shaft 32.

[0154] An auxiliary guide groove 65 is disposed on the side of the auxiliary section 611 facing the connecting section 612. A protruding block 69 protrudes from the lower surface of the auxiliary section 611, extending along the X-axis. The auxiliary guide groove 65 is recessed on the side of the protruding block 69 facing the connecting section 612, extending along the X-axis. The auxiliary guide groove 65 is used to connect with the auxiliary guide member 433 of the secondary swing arm 41.

[0155] The stop section 613 includes an auxiliary end face 614 and a stop surface 66. The auxiliary end face 614 is located on the side of the stop section 613 opposite to the connecting section 612, and the stop surface 66 is located on the second side of the stop section 613. The stop surface 66 is used to cooperate with the abutment surface 48 of the auxiliary swing arm 41 so that the auxiliary swing arm 61 and the auxiliary swing arm 41 cooperate to support the mounting member 21.

[0156] The second support member 67 protrudes from the auxiliary end face 614 of the stop section 613 and is located on the side of the auxiliary end face 614 closest to the stop face 66. Specifically, one side of the second support member 67 along the X-axis is flush with the stop face 66, and the other side of the second support member 67 along the X-axis has a concave arc-shaped surface. The concave arc-shaped surface of the second support member 67 can cooperate with the convex arc-shaped surface of the first support member 49 to provide guidance and support.

[0157] An obstacle avoidance through-hole 68 is provided in the connecting section 612. Along the X-axis direction, the obstacle avoidance through-hole 68 penetrates the connecting section 612, that is, it penetrates both the first and second sides of the connecting section 612. There are two obstacle avoidance through-holes 68, which are spaced apart along the Y-axis direction. The obstacle avoidance through-holes 68 are used to cooperate with the first limiting member 471 of the auxiliary swing arm 41 to prevent the auxiliary swing arm 61 from interfering with the movement of the auxiliary swing arm 41.

[0158] refer to Figure 19 and Figure 20 , Figure 19 This is a schematic diagram of the rotating mechanism 100 provided in the first embodiment of this application in its unfolded state. Figure 20 yes Figure 19 The diagram shows a partial structural schematic of the rotating mechanism 100. Two mounting members 21 are respectively disposed on both sides of the support base 10, and two main swing arms 31 are rotatably connected to the support base 10, and the two main swing arms 31 are slidably and rotatably connected to the mounting members 21. That is, the first main swing arm 31a and the second main swing arm 31b are rotatably connected to the support base 10. The first main swing arm 31a is slidably and rotatably connected to the first mounting member 21a, and the second main swing arm 31b is slidably and rotatably connected to the second mounting member 21b.

[0159] The main swing arm 31 is slidably and rotatably connected to the support base 10, specifically including a main sliding part 34 rotatably connected to a main rotating groove 15. Specifically, the main sliding part 34 is located within the main rotating groove 15, and the main sliding part 34 can rotate within the main rotating groove 15. Furthermore, the main limiting member 35 extends into the gap between the main limiting protrusion 19 and the bottom surface of the main rotating groove 15 to prevent the main swing arm 31 from disengaging from the main rotating groove 15.

[0160] The main swing arm 31 is slidably and rotatably connected to the mounting component 21, specifically including: an extension 39 of the main swing arm 31 extending into the first notch 28 of the mounting component 21, and a main sliding member 391 slidably and rotatably connected to the main sliding hole 22 of the mounting component 21. That is, the main sliding member 391 can extend into the main sliding hole 22, and the main sliding member 391 can slide and rotate within the main sliding hole 22, and the main sliding member 391 slides along the Z-axis direction.

[0161] Continue to refer to Figure 19 and Figure 20Two auxiliary swing arms 41 are rotatably connected to the support base 10, and two auxiliary swing arms 41 are slidably connected to two mounting parts 21. That is, the first auxiliary swing arm 41a and the second auxiliary swing arm 41b are rotatably connected to the support base 10, the first auxiliary swing arm 41a is slidably connected to the first mounting part 21a, and the second auxiliary swing arm 41b is slidably connected to the second mounting part 21b.

[0162] The auxiliary swing arm 41 is rotatably connected to the support base 10, specifically including: an auxiliary sliding part 43 rotatably connected to an auxiliary rotating groove 16, wherein an auxiliary rotating cylinder 44 extends into the auxiliary rotating groove 16, and a mounting shaft passes through an auxiliary rotating hole 45, and the auxiliary rotating cylinder 44 can rotate around the axial direction of the mounting shaft.

[0163] The sliding connection mounting component 21 of the secondary swing arm 41 specifically includes: a secondary sliding part 43 slidably connected to a secondary sliding groove 23, that is, the secondary sliding part 43 is located within the secondary sliding groove 23, and the secondary sliding part 43 can slide within the secondary sliding groove 23. Furthermore, the connecting section 234 of the first limiting protrusion 232 is located within the clearance hole 473 between the two first limiting members 471 of the secondary swing arm 41, with the first limiting member 471 extending into the first limiting interval 236 and the second limiting member 472 extending into the second limiting interval 237.

[0164] refer to Figure 20 Along the Z-axis, two auxiliary swing arms 61 are stacked on top of two mounting members 21, respectively. The two auxiliary swing arms 61 are rotatably connected to the two mounting members 21, respectively, and respectively rotatably connected to the two main swing arms 31. The two auxiliary swing arms 61 are also slidably and rotatably connected to the two secondary swing arms 41. Specifically, the first auxiliary swing arm 61a is stacked on top of the first mounting member 21a, rotatably connected to the first mounting member 21a, rotatably connected to the first main swing arm 31a, and slidably and rotatably connected to the first secondary swing arm 41a. The second auxiliary swing arm 61b is stacked on top of the second mounting member 21b, rotatably connected to the second mounting member 21b, rotatably connected to the second main swing arm 31b, and slidably and rotatably connected to the second secondary swing arm 41b.

[0165] The auxiliary swing arm 61, stacked above the mounting member 21, specifically includes: a stop section 613 stacked above the secondary sliding groove 23 and the second rotating hole 242, with the stop section 613 and the secondary sliding part 43 having abutment notches 46 facing each other. A connecting section 612 stacked above the secondary sliding groove 23, and along the X-axis, the connecting section 612 and the first limiting protrusion 232 facing each other. A portion of the connecting section 612 is located within the second notch 29 of the mounting member 21. At this time, along the X-axis, the portion of the secondary sliding groove 23 having the first limiting protrusion 232 communicates with the clearance through hole 68 of the connecting section 612. The connecting section 612 connects the auxiliary section 611 and the stop section 613, allowing the stop section 613 to operate synchronously with the auxiliary section 611, eliminating the need for a separate connection structure for the stop section 613.

[0166] The auxiliary section 611 is stacked on the mounting member 21 where the mounting through hole 25 and the first rotating hole 241 are provided. The main swing arm 31 is located between the mounting member 21 and the support base 10. The protrusion 69 of the auxiliary section 611 is located in the mounting through hole 25, which can increase the structural compactness of the rotating mechanism 100. The opening of the auxiliary guide groove 65 on the protrusion 69 faces the secondary sliding groove 23, that is, along the Y-axis direction, the auxiliary guide groove 65 and the secondary sliding groove 23 are connected. When the foldable electronic device 1000 is in the folded state, the two first limiting members 471 of the secondary swing arm 41 extend into the two auxiliary guide grooves 65 respectively, thereby avoiding interference between the auxiliary swing arm 61 and the secondary swing arm 41 and increasing the structural compactness of the rotating mechanism 100.

[0167] refer to Figure 21 , Figure 21 yes Figure 19 A cross-sectional view along direction AA is provided. The auxiliary swing arm 61 is rotatably connected to the mounting component 21, specifically including two auxiliary rotating parts 62 of the auxiliary swing arm 61, which are respectively rotatably connected to two auxiliary rotating holes 24 of the mounting component 21. The auxiliary rotating parts 62 extend into the auxiliary rotating holes 24 and can rotate within them. Simultaneously, the auxiliary protrusion 272 of the mounting component 21 is located within the guide opening 63 of the auxiliary swing arm 61, ensuring a reliable connection between the auxiliary swing arm 61 and the mounting component 21, and increasing the structural compactness of the rotating mechanism 100. That is, the mounting component 21 has an auxiliary rotating hole 24 on the side away from the main swing arm 31, and the auxiliary section 611 has an auxiliary rotating part 62 on the side away from the main swing arm 31, with the auxiliary rotating part 62 rotatably connected to the auxiliary rotating hole 24. The auxiliary rotating part 62 can be an arc-shaped plate, and the auxiliary rotating hole 24 is an arc-shaped hole, with the arc-shaped contour of the auxiliary rotating hole 24 located on a circle.

[0168] refer to Figure 22 , Figure 22 yes Figure 19A cross-sectional view of the structure along the BB direction is provided. The auxiliary swing arm 61, rotatably connected to the main swing arm 31, specifically includes: a main rotating part 33 rotatably connected to an auxiliary rotating cylinder 64 of the auxiliary swing arm 61. The auxiliary rotating cylinder 64 extends into the mounting gap 37 between the two main rotating cylinders 36. At this time, along the Y-axis direction, the main rotating hole 38 of the main rotating cylinder 36 and the connecting through hole 641 of the auxiliary rotating cylinder 64 are coaxial and connected. Then, a connecting shaft 32 passes through the connecting through hole 641 and the main rotating hole 38, allowing both the main rotating cylinder 36 and the auxiliary rotating cylinder 64 to rotate axially around the connecting shaft 32. That is, the auxiliary section 611 has an auxiliary rotating cylinder 64 on the side facing the main swing arm 31, and the main swing arm 31 has a main rotating cylinder 36 on the side facing the auxiliary section 611, with the auxiliary rotating cylinder 64 rotatably connected to the main rotating cylinder 36.

[0169] refer to Figure 23 , Figure 23 yes Figure 19 A schematic diagram of the cross-sectional structure along the CC direction. The auxiliary swing arm 61 is slidably and rotatably connected to the secondary swing arm 41, specifically including: the auxiliary guide slide 433 of the secondary swing arm 41 extends into the auxiliary guide slide groove 65 of the auxiliary section 611, and the auxiliary guide slide 433 can slide and rotate within the auxiliary guide slide groove 65. That is, the secondary sliding part 43 is slidably connected to the mounting part 21; along the length direction of the rotating mechanism 100, the secondary sliding part 43 and the auxiliary section 611 are arranged at intervals; the auxiliary guide slide 433 is provided on the side of the secondary sliding part 43 facing the auxiliary section 611; the auxiliary guide slide groove 65 is provided on the side of the auxiliary sliding part 43 facing the secondary sliding part 43; the auxiliary guide slide 433 is slidably and rotatably connected to the auxiliary guide slide groove 65.

[0170] As can be seen above, the main swing arm 31 and the auxiliary swing arm 41 are arranged at intervals along the length of the rotating mechanism 100, and the interval between the main swing arm 31 and the auxiliary swing arm 41 is very small. The auxiliary sliding part 43 of the auxiliary swing arm 41 is slidably connected to the mounting member 21. Using this structure, an auxiliary section 611 is set on the opposite part of the mounting member 21 and the main swing arm 31. At this time, the auxiliary section 611 and the auxiliary sliding part 43 are spaced very small along the length of the rotating mechanism 100. Then, an auxiliary rotating member 62, an auxiliary rotating cylinder 64 and an auxiliary guide groove 65 are set in the auxiliary section 611. This allows the auxiliary swing arm 41 to be smoothly connected to the mounting member 21, the main swing arm 31 and the auxiliary swing arm 41, while maintaining the structural compactness of the rotating mechanism 100.

[0171] refer to Figure 20 , Figure 24 and Figure 25 , Figure 24 yes Figure 19 Schematic diagram of the DD-direction cross-section structure. Figure 25 yes Figure 19The diagram shows a cross-sectional view along the EE direction. Two support plates 51 are stacked on top of two mounting members 21, with the secondary swing arm 41 and auxiliary swing arm 61 located between the support plates 51 and the mounting members 21. The lower surface of the support plates 51 faces the mounting members 21, and the two support plates 51 are rotatably connected to the two mounting members 21, forming a virtual rotatable connection. The two support plates 51 are slidably and rotatably connected to the two main swing arms 31. Furthermore, the support plates 51 and mounting members 21 are connected in a lower pair, and the support plates 51 and main swing arms 31 are connected in a higher pair. Specifically, the first support plate 51a is stacked on the first mounting member 21a, rotatably connected to the first mounting member 21a, and slidably and rotatably connected to the first main swing arm 31a. The second support plate 51b is stacked on the second mounting member 21b, rotatably connected to the second mounting member 21b, and slidably and rotatably connected to the second main swing arm 31b.

[0172] In detail, the first bearing guide slide member 52 of the bearing plate 51 is rotatably connected to the bearing guide slide hole 26 of the mounting member 21, and the connecting shaft 32 of the main swing arm 31 is slidably and rotatably connected to the connecting guide slide hole 54 of the bearing plate 51. That is, the first bearing guide slide member 52 is located inside the bearing guide slide hole 26, and the first bearing guide slide member 52 can slide and rotate inside the bearing guide slide hole 26. The connecting shaft 32 of the main swing arm 31 is located inside the connecting guide slide hole 54, and the connecting shaft 32 can slide and rotate along the connecting guide slide hole 54.

[0173] refer to Figure 20 When the foldable electronic device 1000 is in the unfolded state, the upper surface of the first housing 1210, the upper surface of the first support plate 51a, the upper surface of the support plate 12, the upper surface of the second support plate 51b, and the upper surface of the second housing 1220 are arranged sequentially along the X-axis to form an integral plane. The integral plane is used to support the display screen 1300 so that the display screen 1300 can remain flat.

[0174] refer to Figure 26 and Figure 27 , Figure 26 This is a schematic diagram of the rotating mechanism 100 provided in the first embodiment of this application in a semi-expanded state. Figure 27 This is a schematic diagram of the rotating mechanism 100 provided in the first embodiment of this application in a folded state. When the foldable electronic device 1000 switches between an unfolded state and a folded state, the main sliding portion 34 of the main swing arm 31 rotates relative to the support base 10, the main rotating portion 33 of the main swing arm 31 rotates relative to the auxiliary swing arm 61, and the main guiding slide 391 of the main swing arm 31 slides and rotates within the main guiding slide hole 22 of the mounting member 21. The secondary rotating portion 42 of the secondary swing arm 41 rotates relative to the support base 10, the secondary sliding portion 43 of the secondary swing arm 41 slides relative to the mounting member 21, and the secondary sliding portion 43 of the secondary swing arm 41 also slides and rotates relative to the auxiliary swing arm 61. (Reference) Figure 28 , Figure 28 yes Figure 21 The cross-sectional view shown is a schematic diagram illustrating the process of switching from the unfolded state to the folded state. The auxiliary swing arm 61 rotates relative to the mounting member 21; specifically, the auxiliary rotating member 62 rotates within the auxiliary rotating hole 24. (Reference) Figure 29 , Figure 29 yes Figure 22 The cross-sectional view shown is a schematic diagram illustrating the process of switching from the unfolded state to the folded state. The auxiliary swing arm 61 rotates relative to the main swing arm 31; specifically, both the auxiliary rotating cylinder 64 and the main rotating cylinder 36 rotate axially around the connecting shaft 32. (Reference) Figure 30 , Figure 30 yes Figure 23 The cross-sectional view shown is a schematic diagram of the process of switching from the unfolded state to the folded state. The auxiliary swing arm 61 slides and rotates relative to the secondary swing arm 41, specifically, the auxiliary guide slide 433 slides and rotates within the auxiliary guide slide groove 65. The support plate 51 rotates relative to the mounting part 21, and the support plate 51 slides and rotates relative to the main swing arm 31.

[0175] Additionally, refer to Figure 31 and Figure 32 , Figure 31 This is a schematic diagram illustrating the engagement process of the first support member 49 and the second support member 67 when the rotating mechanism 100 provided in the first embodiment of this application switches from an unfolded state to a folded state. Figure 32 This is a partial structural diagram of the rotating mechanism 100 provided in the first embodiment of this application in a folded state. During the process of switching the foldable electronic device 1000 from an unfolded state to a folded state, when the foldable electronic device 1000 approaches the folded state, the first support member 49 of the auxiliary swing arm 41 and the second support member 67 of the stop section 613 are slidably and rotatably connected. The connection method of the first support member 49 and the second support member 67 is a semi-high-pair connection. Specifically, the convex arc surface of the first support member 49 slides along the concave arc surface of the second support member 67. Since the auxiliary swing arm 41 is relatively long along the Y-axis, the first support member 49 and the second support member 67 are provided on the side away from the auxiliary guide slide member 433 and the auxiliary guide slide groove 65 to cooperate. On the one hand, this allows the two opposite sides of the auxiliary swing arm 41 along the Y-axis to rotate synchronously, preventing the side of the auxiliary swing arm 41 away from the auxiliary guide slide member 433 from not rotating into place. On the other hand, after the foldable electronic device 1000 is in a folded state, the second support member 67 can support the secondary swing arm 41, increase the stability of the secondary swing arm 41, and thus enable the foldable electronic device 1000 to remain stable in the folded state.

[0176] When the foldable electronic device 1000 is in a folded state, the first housing 1210 and the second housing are folded relative to each other, that is, the first housing 1210 and the second housing 1220 are opposite each other along the Z-axis direction, the first support plate 51a and the second support plate 51b are opposite each other along the Z-axis direction, and the first support plate 51a is inclined relative to the first housing 1210, and the second support plate 51b is inclined relative to the second housing 1220. At this time, the two support plates 51 and the support base 10 form an accommodating space, and the third display part 1330 of the display screen 1300 is bent and located within the accommodating space. In this embodiment, the third display part 1330 is bent into a teardrop shape. Of course, the third display part 1330 can also be bent into other shapes, and correspondingly, the accommodating space can also be in other shapes.

[0177] In this embodiment, an auxiliary swing arm 61 is added, which has three degrees of freedom. By setting the auxiliary swing arm 61 and the main swing arm 31 to be rotatably connected, that is, by setting the auxiliary swing arm 61 and the main swing arm 31 to be connected in a lower pair, two degrees of freedom of the auxiliary swing arm 61 are eliminated. By setting the auxiliary swing arm 61 and the secondary swing arm 41 to be slidably and rotatably connected, that is, by setting the auxiliary swing arm 61 and the secondary swing arm 41 to be connected in a higher pair, one degree of freedom of the auxiliary swing arm 61 is eliminated. This ensures that the rotation mechanism 100 maintains a single degree of freedom, ensuring that the rotation mechanism 100 can smoothly drive the foldable electronic device 1000 to switch between the folded state and the unfolded state.

[0178] In addition, in this embodiment, the auxiliary swing arm 61 and the secondary swing arm 41 are directly connected without the need for additional shafts for connection, which reduces the number of parts in the rotating mechanism 100 and increases the efficiency of assembling the rotating mechanism 100.

[0179] As can be seen above, the mounting component 21 and the support base 10 are connected by two stages of swing arms: a main swing arm 31 and an auxiliary swing arm 61. While the main swing arm 31 rotates relative to the support base 10, it also rotates relative to the auxiliary swing arm 61, which in turn rotates relative to the mounting component 21. Therefore, compared to a scheme where the mounting component 21 and the support base 10 are only connected by the main swing arm 31, the rotation angle of the main swing arm 31 relative to the support base 10 is reduced. For example: [Refer to...] Figure 33 , Figure 33 This is a simplified partial structural diagram of the rotating mechanism 100 provided in the first embodiment of this application. When the foldable electronic device 1000 switches from the unfolded state to the folded state, the mounting member 21 and the support base 10 are connected by two stages of swing arms: the main swing arm 31 and the auxiliary swing arm 61. The rotation angle of the main swing arm 31 relative to the support base 10 is approximately b degrees. (Reference) Figure 34 , Figure 34 This is a simplified schematic diagram of a partial structure of the rotating mechanism 100 in the related technology. Figure 34The diagram illustrates that the mounting component 21 and the support base 10 are connected only by the main swing arm 31, and the rotation angle of the main swing arm 31 relative to the support base 10 is approximately 'a' degrees. Angle 'b' is significantly smaller than angle 'a'. Typically, angle 'a' is around 110 degrees, in which case angle 'b' can be less than 110 degrees. Specifically, angle 'b' can be 105 degrees, 100 degrees, 95 degrees, 90 degrees, 85 degrees, 80 degrees, 75 degrees, 70 degrees, or 65 degrees, etc. That is, in this embodiment, by setting an auxiliary swing arm 61 and rotatably connecting the auxiliary swing arm 61 to the main swing arm 31, and rotatably connecting the auxiliary swing arm 61 to the mounting component 21, the rotation angle of the main swing arm 31 is reduced.

[0180] refer to Figure 35 , Figure 35 This is a schematic diagram of the active space of the main swing arm 31 when the rotating mechanism 100 provided in the first embodiment of this application switches from the unfolded state to the folded state. The wall thickness of the main swing arm 31 is affected by the rotation angle of the main swing arm 31. Specifically, the relationship between the wall thickness of the main swing arm 31 and the rotation angle of the main swing arm 31 is as follows: the smaller the rotation angle of the main swing arm 31, the thicker the wall thickness of the main swing arm 31 can be. Conversely, the larger the rotation angle of the main swing arm 31, the thinner the wall thickness of the main swing arm 31 can be. This is because when the foldable electronic device 1000 is in the unfolded state, the portion of the main swing arm 31 located between the housing 1200 and the support base 10 cannot extend into the gap between the housing 1200 and the support base 10. Specifically, the lower surface of the main swing arm 31 cannot extend into the gap between the housing 1200 and the support base 10. When the foldable electronic device 1000 is in the folded state, a portion of the main swing arm 31 is used to enclose the screen space, specifically a portion of the upper surface of the main swing arm 31 is used to enclose the screen space. To prevent the main swing arm 31 from squeezing the display screen 1300, the portion of the main swing arm 31 used to enclose the space for accommodating the screen needs to be designed according to the curvature of the display screen 1300. Therefore, when the foldable electronic device 1000 switches between the unfolded state and the folded state, the total moving space of the main swing arm 31 is fixed.

[0181] refer to Figure 31 With the foldable electronic device 1000 in a folded state as a reference, the total movable space K of the main swing arm 31 lies between the upper edge of the shaft cover 11 of the support base 10 and the lower surface of the curved portion of the display screen 1300. When the total movable space volume of the main swing arm 31 remains constant, and the screen-accommodating space volume remains constant, the larger the rotation angle of the main swing arm 31, the larger the space required for the main swing arm 31 to rotate, and the smaller the space left for the wall thickness of the main swing arm 31, resulting in a smaller wall thickness. Conversely, the smaller the rotation angle of the main swing arm 31, the smaller the space required for the main swing arm 31 to rotate, and the larger the space left for the wall thickness of the main swing arm 31, resulting in a larger wall thickness.

[0182] In this embodiment, by setting an auxiliary swing arm 61, the rotation angle of the main swing arm 31 is reduced. The space saved by reducing the rotation angle of the main swing arm 31 can be used to increase the wall thickness of the main swing arm 31, thereby increasing the structural strength of the main swing arm 31.

[0183] Under normal circumstances, to increase the screen-holding space and prevent the display screen 1300 from being squeezed, a screen-holding groove is provided on the upper surface of the support plate 12. When the foldable electronic device 1000 is in the folded state, the curved part of the display screen 1300 extends into the screen-holding groove to prevent the display screen 1300 from being squeezed and deformed. However, when the foldable electronic device 1000 is in the unfolded state, the display screen 1300 is not supported at the screen-holding groove position, and the display screen 1300 may bend. Furthermore, if the user operates the display screen 1300 in the position opposite to the screen-holding groove, the display screen 1300 will deform downwards and extend into the screen-holding groove, and the display screen 1300 may not be able to sense the user's pressure, that is, the sensitivity of the display screen 1300 will decrease. In order to make the display screen 1300 sense the pressure operation, the user may repeatedly press hard, which may lead to damage to the display screen 1300.

[0184] To address the aforementioned issues, in some embodiments, the space saved by reducing the rotation angle of the main swing arm 31 can be used to increase the screen-accommodating space. Specifically, the rotation angle of the main swing arm 31 is reduced while the wall thickness of the main swing arm 31 remains unchanged. In this case, the distance between the upper surfaces of the two main swing arms 31 increases, meaning the volume of the screen-accommodating space increases. Therefore, the depth of the screen-accommodating groove on the upper surface of the support plate 12 can be reduced, or even eliminated altogether, thereby increasing the flatness of the upper surface of the support plate 12. For example, without the auxiliary swing arm 61, the rotation angle of the main swing arm 31 is approximately 100 degrees, corresponding to a wall thickness of approximately 0.4 mm and a screen-accommodating groove depth of approximately 0.2 mm. After the auxiliary swing arm 61 is provided, the rotation angle of the main swing arm 31 is reduced to approximately 90 degrees, while the wall thickness of the main swing arm 31 remains unchanged, i.e., the wall thickness of the main swing arm 31 is still approximately 0.4 mm, and the screen-accommodating groove depth is reduced to approximately 0.1 mm. At this time, when the foldable electronic device 1000 is in the unfolded state, the display screen 1300 is reliably supported, which improves the flatness of the display screen 1300, increases the sensitivity of the display screen 1300, and reduces the risk of damage to the display screen 1300.

[0185] In some embodiments, the space saved by reducing the rotation angle of the main swing arm 31 can be divided into two parts: one part is used to increase the wall thickness of the main swing arm 31, and the other part is used to increase the screen-accommodating space. For example, without the auxiliary swing arm 61, the rotation angle of the main swing arm 31 is approximately 100 degrees, corresponding to a wall thickness of approximately 0.4 mm and a screen-accommodating groove depth of approximately 0.2 mm. After the auxiliary swing arm 61 is provided, the rotation angle of the main swing arm 31 is reduced to approximately 90 degrees, corresponding to a wall thickness of approximately 0.45 mm and a screen-accommodating groove depth of approximately 0.15 mm.

[0186] Additionally, refer to Figure 36 and Figure 37 , Figure 36 This is a schematic diagram illustrating the engagement process of the stop surface 66 and the abutment surface 48 when the rotating mechanism 100 provided in the first embodiment of this application switches from the unfolded state to the folded state. Figure 37 yes Figure 32 The diagram shows an enlarged view of point A. In this embodiment, a notch 46 is provided on the auxiliary swing arm 41, with a portion of the inner wall of the notch 46 serving as the abutment surface 48. A stop section 613 is provided on the auxiliary swing arm 61, with the side of the stop section 613 serving as the stop surface 66. During the process of the foldable electronic device 1000 switching from an unfolded state to a folded state, the stop section 613 gradually extends into the notch 46.

[0187] refer to Figure 38 and Figure 39 , Figure 38 This is a schematic diagram showing the stop surface 66 and the abutment surface 48 facing each other when the rotating mechanism 100 provided in the first embodiment of this application is in a folded state. Figure 39 This is a schematic diagram from another perspective showing the stop surface 66 and the abutment surface 48 facing each other when the rotating mechanism 100 provided in the first embodiment of this application is in a folded state. When the foldable electronic device 1000 is in a folded state, the stop section 613 is located within the abutment notch 46, and the abutment surface 48 and the stop surface 66 face each other. Here, "facing each other" can be understood as follows: along the direction from the support base 10 to the mounting member 21, that is, along the X-axis direction, the orthogonal projection of the stop surface 66 on the mounting member 21 is at least partially located on the abutment surface 48. However, under normal circumstances, due to processing and assembly reasons, there is a gap h1 between the stop and the abutment surface 48.

[0188] The stop section 613 is located within the abutment notch 46, serving both as a stop and increasing the structural compactness of the rotating mechanism 100. Furthermore, when the stop section 613 is within the abutment notch 46, the auxiliary end face 614 of the stop section 613 and the first side face 461 of the abutment notch 46 face each other, and the first support member 49 and the second support member 67 abut against each other. This allows for better cooperation between the stop surface 66 and the abutment surface 48, preventing misalignment between them, preventing the auxiliary swing arm 61 from failing to support itself, and thus preventing the mounting member 21 and the housing 1200 from sliding downwards, reducing the risk of damage to the display screen 1300.

[0189] As can be seen, the first support member 49 and the abutment surface 48 share the abutment notch 46, and the second support member 67 and the stop surface 66 share the stop section 613, which can increase the structural compactness of the rotating mechanism 100. Furthermore, the supporting and guiding functions of the first support member 49 and the second support member 67 allow the stop surface 66 and the abutment surface 48 to better cooperate, preventing misalignment between them, preventing the auxiliary swing arm 61 from failing to support itself, and thus preventing the mounting part 21 and the housing 1200 from sliding downwards, reducing the risk of damage to the display screen 1300.

[0190] When the foldable electronic device 1000 is in the folded state, the stop surface 66 and the abutment surface 48 are parallel to each other. This results in a large contact area and surface-to-surface contact when the stop surface 66 and the abutment surface 48 come into contact with each other. This can increase the force balance of the auxiliary swing arm 61 and the mounting component 21, thereby reducing the risk of damage to the auxiliary swing arm 61 and the mounting component 21.

[0191] refer to Figure 40 , Figure 40 This is a diagram showing the state changes of the rotating mechanism 100 provided in the first embodiment of this application when it is in a folded state and subjected to an external impact force. Figure 40 Figure (a) shows the state of the rotating mechanism 100 of the foldable electronic device 100 before it is subjected to an external impact force. Figure 40 Figure (b) shows the state of the rotating mechanism 100 of the foldable electronic device 1000 after being subjected to an external impact force. When the foldable electronic device 1000 is in the folded state, the first housing 1210 and the second housing 1220 are folded relative to each other, that is, the first housing 1210 and the second housing 1220 are stacked along the Z-axis direction. The two support plates 51 are opposite each other along the Z-axis direction, and the upper surface of the support plate 51 is inclined relative to the upper surface of the housing 1200. The two support plates 51 and the support plate 12 form a teardrop-shaped screen-containing space. The third display part 1330 of the display screen 1300 is located within the screen-containing space, and the third display part 1330 is bent into a teardrop shape. Of course, the third display part 1330 can also be bent into other shapes.

[0192] When the first housing 1210 and the second housing 1220 are folded relative to each other, and the support base 10 is subjected to an external impact force, the support base 10 is located at the bottom of the foldable electronic device 1000. The housing 1200, the mounting member 21, the auxiliary swing arm 61, the secondary swing arm 41, and the support base 10 are arranged sequentially from top to bottom. That is, the first housing 1210, the first mounting member 21a, the first secondary swing arm 41a, and the support base 10 are arranged sequentially from top to bottom, and the second housing 1220, the second mounting member 21b, the second secondary swing arm 41b, and the support base 10 are arranged sequentially from top to bottom.

[0193] When the support base 10 is subjected to an external impact force, the secondary swing arm 41 and the support base 10 are rotatably connected via a mounting shaft. The secondary swing arm 41 is supported by the mounting shaft and will not slide downward relative to the support base 10. The auxiliary swing arm 61 and the mounting member 21 are rotatably connected. The mounting member 21 is supported by the auxiliary swing arm 61 and will not slide downward relative to the auxiliary swing arm 61. However, the secondary swing arm 41 and the auxiliary swing arm 61 are slidably and rotatably connected, and there is a gap h1 between the stop surface 66 and the abutment surface 48. Therefore, the auxiliary swing arm 61 will slide downward relative to the secondary swing arm 41, and the mounting member 21 and the housing 1200 will slide downward synchronously with the auxiliary swing arm 61.

[0194] After the stop surface 66 and the abutment surface 48 come into contact, the housing 1200, the mounting component 21, and the auxiliary swing arm 61 all stop sliding down, and the housing 1200, the mounting component 21, the auxiliary swing arm 61, the secondary swing arm 41, and the support base 10 are relatively fixed. The distance that the housing 1200 and the mounting component 21 slide downward is equal to the width of the gap h1. The gap h1 is very small, therefore, the distance that the first display part 1310 and the second display part 1320 move downward is very small, which can prevent wrinkles or even breakage at the connection between the first display part 1310 and the third display part 1330, and can also prevent wrinkles or even breakage at the connection between the second display part 1320 and the third display part 1330, that is, prevent the display screen 1300 from being squeezed, and thus prevent the entire display screen 1300 from failing.

[0195] In addition, the impact force of the support base 10 can be transmitted to the housing 1200 in sequence through the secondary swing arm 41, the auxiliary swing arm 61 and the mounting component 21, forming an effective force transmission path between the support base 10, the secondary swing arm 41, the auxiliary swing arm 61, the mounting component 21 and the housing 1200. This effective force transmission path can disperse the impact force to the support base 10, the secondary swing arm 41, the auxiliary swing arm 61, the mounting component 21 and the housing 1200, thereby reducing the stress on the support base 10 and preventing damage to the support base 10.

[0196] Of course, it is understandable that if the first housing 1210 and the second housing 1220 are folded relative to each other, and the support base 10 is not subjected to external impact, the stop surface 66 is already in contact with the abutment surface 48. Then, after the support base 10 is subjected to external impact, the housing 1200, the mounting component 21, and the auxiliary swing arm 61 will tend to move downwards. However, the support base 10, the auxiliary swing arm 41, and the auxiliary swing arm 61 are relatively fixed and have become a whole, forming an effective force transmission path. Therefore, the housing 1200 will not move downwards, thus preventing the display screen 1300 from being squeezed.

[0197] In related technologies, refer to Figure 41 , Figure 41 This is a diagram showing the state changes of a foldable electronic device 1000 in a folded state when subjected to an external impact force. Figure 41 (a) shows the state of the foldable electronic device 1000 before it is subjected to an impact. Figure 41 Image (b) illustrates the state of the foldable electronic device 1000 after being subjected to an impact. When the foldable electronic device 1000 is in a folded state, if it is accidentally dropped and the support base 10 is at the impact point, the support base 10 will be subjected to an impact force. Under the action of the impact force, the secondary swing arm 41 will slide relative to the housing 1200. At this time, the housing 1200 moves towards the support base 10. The first display part 1310 of the display screen 1300 is fixedly connected to the first housing 1210, and the second display part 1320 is fixedly connected to the second housing 1220. Therefore, the first display part 1310 and the second display part 1320 also move towards the support base 10. At this time, the third display part 1330 will be squeezed. This causes the third display part 1330 to fail, which in turn causes the entire display screen 1300 to fail.

[0198] Compared with the aforementioned related technologies, in this embodiment, when the housing 1200 and the mounting member 21 slide downwards, the stop surface 66 and the abutment surface 48 abut against each other. This allows the housing 1200 to slide downwards only a very small distance, or even not downwards at all, preventing the display screen 1300 from malfunctioning and reducing the stress on the support base 10, thus preventing damage to the support base 10. In other words, it can increase the drop resistance of the foldable electronic device 1000.

[0199] In another related technology, reference Figure 42 , Figure 42 This is a diagram showing the state changes of a foldable electronic device 1000 in another related technology when it is in a folded state and subjected to an external impact force. Figure 42 Image (a) illustrates the state of the foldable electronic device 1000 before it is subjected to an impact force. Figure 42Image (b) illustrates the state of the foldable electronic device 1000 after being subjected to an impact force. A protrusion 520 is provided on the surface of the support plate 51 facing the mounting member 21. A first groove 410 is provided on the secondary swing arm 41, and a second groove 210 is provided on the mounting member 21. When the foldable electronic device 1000 is in the folded state, the secondary swing arm 41 is located between the support plate 51 and the mounting member 21, the first groove 410 and the second groove 210 are connected, and the protrusion 520 extends into the first groove 410 and the second groove 210. Then, one end of the protrusion 520 faces the inner wall surface of the first groove 410, and the other end of the protrusion 520 faces the inner wall surface of the second groove 210. When the foldable electronic device 1000 is in a folded state and the support base 10 is subjected to an external impact force, the housing 1200 and the carrier plate 51 slide downward relative to the support base 10. One end of the protrusion 520 abuts against the inner wall surface of the first groove 410, and the other end of the protrusion 520 abuts against the inner wall surface of the second groove 210, thereby supporting the housing 1200 and preventing the housing 1200 from driving the first display part 1310 and the second display part 1320 to move downward, thus avoiding the display screen 1300 being squeezed.

[0200] However, in this related technology, the support plate 51 is mainly used to support the display screen 1300 to ensure that the display screen 1300 can be flattened when the foldable electronic device 1000 is in the unfolded state. When the foldable electronic device 1000 is in the folded state, the support plate 51 is used to enclose the space containing the screen. Therefore, when the foldable electronic device 1000 switches between the unfolded and folded states, the space occupied by the support plate 51 and the rotation angle are mainly designed according to the state of the display screen 1300, and the rotation angle that the support plate 51 can rotate is relatively limited.

[0201] When the protrusion 520 on the support plate 51 is provided to also support the housing 1200, the overlap between the protrusion 520 and the inner wall of the first groove 410 is small due to space and rotation angle limitations of the support plate 51. Therefore, if the foldable electronic device 1000 is in a folded state and the support base 10 is subjected to external impact, the protrusion 520 may slide down from the inner wall of the first groove 410. At this time, the support plate 51 loses its support, and correspondingly, the housing 1200 supported by the support plate 51 also loses its support. Naturally, the housing 1200 will cause the first display part 1310 and the second display part 1320 to slide downward, thereby causing the display screen 1300 to be squeezed.

[0202] To increase the overlap between the protrusion 520 and the first groove 410, the width of the gap between the protrusion 520 and the first groove 410 needs to be increased. This means that when the foldable electronic device 1000 is subjected to external impact, the downward sliding distance of the support plate 51 and the housing 1200 increases. This causes the first display unit 1310 and the second display unit 1320 to slide downwards a greater distance, resulting in wrinkles at the connection between the first display unit 1310 and the third display unit 1330. Ultimately, this could lead to the failure of the display screen 1300.

[0203] Furthermore, since the protrusion 520 is located on the surface of the support plate 51 facing the mounting member 21, the protrusion 520 needs to extend a certain thickness away from the support plate 51 to cooperate with the secondary swing arm 41. This results in a portion of the protrusion 520 extending out of the first groove 410 and the second groove 210 when the foldable electronic device 1000 is in a folded state. Consequently, the center of gravity of the protrusion 520 is completely misaligned with the center surface of the inner wall of the first groove 410. When the support base 10 is subjected to external impact, the protrusion 520 is prone to detach from the secondary swing arm 41, affecting the stability of the housing 1200. This leads to the housing 1200 easily sliding downwards, ultimately causing the display screen 1300 to be squeezed.

[0204] In this embodiment, when the foldable electronic device 1000 is in the unfolded state, the auxiliary swing arm 61 is tilted at a certain angle relative to the secondary swing arm 41. When the foldable electronic device 1000 switches from the unfolded state to the folded state, the rotation angle of the auxiliary swing arm 61 is greater than the rotation angle of the support plate 51, so that when the foldable electronic device 1000 is in the folded state and the support base 10 is subjected to external impact force, the overlap between the stop surface 66 and the abutment surface 48 is greater than... Figure 42 The overlap between the inner wall surfaces of the protrusion 520 and the first groove 410 in the prior art is shown. Of course, the above comparison results are based on the following premise: the gap h1 and... Figure 42 In the related art shown, the width of the gap between the protrusion 520 and the inner wall surface of the first groove 410 is the same. For example, the gap h1 in the embodiment of this application and Figure 42 In the related art shown, when the gap between the inner wall surfaces of the protrusion 520 and the first groove 410 is approximately 0.35 mm, the overlap between the stop surface 62 and the abutment surface 263 in this embodiment is 0.38 mm. Figure 42 In the related technology shown, the overlap between the inner wall surfaces of the protrusion 520 and the first groove 410 is 0.11 mm. That is, the stop gap h1 of the anti-drop structure in this embodiment can be made smaller, and the overlap can be made larger, which is beneficial to improving drop reliability.

[0205] As can be seen from the above, in this embodiment, the stop surface 66 of the auxiliary swing arm 61 and the abutting surface 48 of the secondary swing arm 41 abut against each other, which can improve the drop reliability of the foldable electronic device 1000, improve the reliability against sharp impacts, and provide good impact drop performance. At the same time, the auxiliary swing arm 61 and the connection between the main swing arm 31 and the mounting component 21 facilitate the flattening of the rotating mechanism 100. Furthermore, in this embodiment, a main-secondary structure can be adopted, where the main refers to the first swing arm assembly 30 and the secondary refers to the second swing arm assembly 40, to reduce the number of parts and cost of the rotating mechanism 100. In related technologies, a main-secondary-main structure is generally used, resulting in a larger number of parts in the rotating mechanism.

[0206] In this embodiment of the application, reference is made to Figure 43 , Figure 43 yes Figure 20 The diagram shows a partial structural schematic of the rotating mechanism 100. The foldable electronic device 1000 also requires a synchronizing element 70 to achieve synchronized operation of the first housing 1210 and the second housing 1220, and a damping assembly 80 to provide damping force for their operation. Specifically, the synchronizing element 70 is a helical block, comprising a first helical sleeve 71 and a second helical sleeve 72 fixedly connected along the X-axis. The first helical sleeve 71 has a first helical surface 73, and the second helical sleeve 72 has a second helical surface 74. The damping assembly 80 includes two first concave cams 81, two second concave cams 82, two main elastic elements 83, and two pushing elements 84. Along the X-axis, the two first concave cams 81 are fixedly connected, the two second concave cams 82 are fixedly connected, and the two pushing elements 84 are fixedly connected.

[0207] The synchronizing element 70 needs to cooperate with the auxiliary swing arm 41 to achieve synchronization. Specifically, the two auxiliary rotating cylinders 44 of the auxiliary swing arm 41 are the first auxiliary rotating cylinder 441 and the second auxiliary rotating cylinder 442. The rotating part of the auxiliary swing arm 41 is provided with a mating helical surface 443. A part of the mating helical surface 443 is located on the side of the first auxiliary rotating cylinder 441 facing the second auxiliary rotating cylinder 442, and the other part of the mating helical surface 443 is located on the side of the second auxiliary rotating cylinder 442 facing the first auxiliary rotating cylinder 441.

[0208] refer to Figure 44 , Figure 44This is a schematic diagram of the structure of the auxiliary rocker arm 41 in the rotating mechanism 100 provided in the first embodiment of this application, including a first part 411 and a second part 412. It is understood that compared to machining methods such as computerized numerical control (CNC) machine tools, using molds to process the auxiliary rocker arm 41 can reduce costs. Therefore, the auxiliary rocker arm 41 can be configured as a split structure. Specifically, the auxiliary rocker arm 41 includes a first part 411 and a second part 412 that are detachably connected along the Y-axis direction. The first part 411 includes a first auxiliary rotating cylinder 441, a portion of the auxiliary sliding part 43 with an auxiliary guide cylinder 431, and a first limiting member 471. The second part 412 includes a second auxiliary rotating cylinder 442, a portion of the auxiliary sliding part 43 with an abutment notch 46, another first limiting member 471, and a second limiting member 472. When the auxiliary rocker arm 41 is configured as a single unit, the first auxiliary rotating cylinder 441 and the second auxiliary rotating cylinder 442 are connected as one unit along the Y-axis. In this case, a portion of the mating helical surface 443 will protrude relative to the inner wall of the auxiliary rotating hole 45, thus preventing the mold from being ejected. In this embodiment, the auxiliary rocker arm 41 is configured as a detachable first part 411 and a second part 412, allowing the first auxiliary rotating cylinder 441 and the second auxiliary rotating cylinder 442 to be formed independently. This avoids the mating helical surface 443 protruding relative to the inner wall of the auxiliary rotating hole 45, thus allowing the auxiliary rocker arm 41 to be machined using a mold. Of course, in other embodiments, the auxiliary rocker arm 41 can also be CNC machined into a single unit, and this application is not limited to this.

[0209] refer to Figure 43 The first rotating cylinder 441, the first spiral sleeve 71, and the second rotating cylinder 442 of the first auxiliary swing arm 41a are sequentially sleeved on the first mounting shaft 17. The first spiral sleeve 71 can move axially along the first mounting shaft 17. The first spiral surface 73 of the first spiral sleeve 71 abuts against the mating spiral surface 443 of the first auxiliary swing arm 41a. The first rotating cylinder 441, the second spiral sleeve 72, and the second rotating cylinder 442 of the second auxiliary swing arm 41b are sequentially sleeved on the second mounting shaft 18. The second spiral sleeve 72 can move axially along the second mounting shaft 18. The second spiral surface 74 of the second spiral sleeve 72 abuts against the mating spiral surface 443 of the second auxiliary swing arm 41b.

[0210] When the foldable electronic device 1000 switches between a folded state and an unfolded state, the first auxiliary rotating cylinder 441 and the second auxiliary rotating cylinder 442 of the first auxiliary swing arm 41a rotate around the first mounting shaft 17. The first helical surface 73 of the first helical sleeve 71 and the mating helical surface 443 of the first auxiliary swing arm 41a cooperate with each other to make the first helical sleeve 71 move along the Y-axis. The first helical sleeve 71 drives the second helical sleeve 72 to move along the Y-axis. The second helical surface 74 of the second helical sleeve 72 and the second mating helical surface 443 of the second auxiliary swing arm 41b cooperate with each other to drive the first auxiliary rotating cylinder 441 and the second rotating cylinder 442 of the second auxiliary swing arm 41b to rotate around the second mounting shaft 18, so that the first auxiliary swing arm 41a and the second swing arm 41b move synchronously, thereby realizing the synchronous movement of the first housing 1210 and the second housing 1220.

[0211] The first auxiliary rotating cylinder 441 has a first concave-convex portion 444 at its end opposite to the second auxiliary rotating cylinder 442, and the second auxiliary rotating cylinder 442 has a second concave-convex portion 445 at its end opposite to the first auxiliary rotating cylinder 441. The first concave cam 81 has a first mating concave-convex portion 85, and the second concave cam 82 has a second mating concave-convex portion 86. The first concave cam 81, the second concave cam 82, the main elastic element 83, and the pushing element 84 are all disposed in the receiving groove 13 of the support base 10. The two first concave cams 81 are respectively sleeved on the first mounting shaft 17 and the second mounting shaft 18, the two second concave cams 82 are respectively sleeved on the first mounting shaft 17 and the second mounting shaft 18, the two main elastic elements 83 are respectively sleeved on the first mounting shaft 17 and the second mounting shaft 18, and the two pushing elements 84 are respectively sleeved on the first mounting shaft 17 and the second mounting shaft 18. Along the Y-axis, the first concave cam 81, the first auxiliary rotating cylinder 441, the first spiral sleeve 71, the second auxiliary rotating cylinder 442, the second concave cam 82, the main elastic element 83, and the pushing element 84 are arranged sequentially, with the main elastic element 83 in a pre-compressed state. The first concave-convex part 444 and the first mating concave-convex part 85 are engaged, and the second concave-convex part 445 and the second mating concave-convex part 86 are engaged.

[0212] When the foldable electronic device 1000 switches between a folded state and an unfolded state, both the first housing 1210 and the second housing 1220 rotate relative to the support base 10. The first auxiliary rotating cylinder 441 and the second auxiliary rotating cylinder 442 of the two auxiliary swing arms 41 also rotate relative to the support base 10. The engagement state of the first protrusion 444 and the first mating protrusion 85 changes, as does the engagement state of the second protrusion 445 and the second mating protrusion 86. This causes the main elastic element 83 to be compressed or extended, thereby providing damping force to the first housing 1210 and the second housing 1220. The change in the engagement state of the first protrusion 444 and the first mating protrusion 85 refers to the fact that, as the auxiliary swing arms 41 rotate, the first protrusion 444 and the first mating protrusion 85 can switch between peak-valley engagement and peak-peak engagement. Peak-valley fit refers to the convex portion of the first convex-concave portion 444 being located within the concave portion of the first mating convex-concave portion 85, and the convex portion of the first mating convex-concave portion 85 being located within the concave portion of the first convex-concave portion 444. Peak-peak fit refers to the convex portion of the first convex-concave portion 444 and the convex portion of the first mating convex-concave portion 85 abutting each other. The change in the fit state of the second convex-concave portion 445 and the second mating convex-concave portion 86 is similar to the change in the fit state of the first convex-concave portion 444 and the first mating convex-concave portion 85, and will not be described in detail here.

[0213] The second embodiment of this application provides a rotating mechanism 100, see reference. Figure 45 , Figure 45 This is a schematic diagram of the split structure of the rotating mechanism 100 provided in the second embodiment of this application. The rotating mechanism 100 includes a support base 10, a mounting assembly 20, a first swing arm assembly 30, a second swing arm assembly 40, an auxiliary assembly 60, a synchronizing element 70, and a damping assembly 80. There can be one or more second swing arm assemblies 40 and first swing arm assemblies 30.

[0214] The first swing arm assembly 30 includes two main swing arms 31 and two connecting shafts 32. The two main swing arms 31 are designated as first main swing arm 31a and second main swing arm 31b, and the two connecting shafts 32 are designated as first connecting shaft 32a and second connecting shaft 32b. The second swing arm assembly 40 includes two auxiliary swing arms 41, designated as first auxiliary swing arm 41a and second auxiliary swing arm 41b. The auxiliary assembly 60 includes two auxiliary swing arms 61, designated as first auxiliary swing arm 61a and second auxiliary swing arm 61b.

[0215] refer to Figure 46 , Figure 46This is a schematic diagram of the rotating mechanism 100 provided in the second embodiment of this application. The main swing arm 31 is rotatably connected to the support base 10 and the auxiliary swing arm 61. The secondary swing arm 41 is rotatably connected to the support base 10, slidably connected to the mounting member 21, and slidably and rotatably connected to the auxiliary swing arm 61. The auxiliary swing arm 61 is rotatably connected to the main swing arm 31 and slidably and rotatably connected to the secondary swing arm 41, forming a high-pair connection between the auxiliary swing arm 61 and the secondary swing arm 41. The auxiliary swing arm 61 is rotatably connected to the mounting member 21, forming a low-pair connection between the auxiliary swing arm 61 and the mounting member 21.

[0216] The structures of the bearing base, mounting component 21, main swing arm 31, and auxiliary swing arm 41 are similar to those in the above embodiments. In this embodiment, only a brief description is given, and no further details are provided.

[0217] refer to Figure 47 , Figure 47 yes Figure 45 The diagram shows the structure of the support base 10 of the rotating mechanism 100. The support base includes a shaft cover 11 and a support plate 12, and is provided with a main rotating groove 15 and a secondary rotating groove 16.

[0218] refer to Figure 48 and Figure 49 , Figure 48 yes Figure 45 A schematic diagram of the structure of the mounting component 21 of the rotating mechanism 100 shown. Figure 49 yes Figure 45 The diagram shows a structural schematic of the mounting member 21 of the rotating mechanism 100 from another perspective. The mounting member 21 is provided with a secondary sliding groove 23, an auxiliary rotating hole 24, and a mounting through hole 25. Along the Y-axis, the secondary sliding groove 23, the mounting through hole 25, and the auxiliary rotating cylinder 64 are arranged sequentially at intervals. A secondary limiting protrusion 231 is provided within the secondary sliding groove 23, and this secondary limiting protrusion 231 has the same structure as the first limiting protrusion 232 in the above embodiment. An auxiliary protrusion 272 is provided on the upper surface of the mounting member 21, located at the position where the auxiliary rotating hole 24 is located. The auxiliary rotating hole 24 penetrates the auxiliary protrusion 272 along the Z-axis.

[0219] refer to Figure 50 , Figure 50 yes Figure 45 The diagram shows the structure of the main swing arm 31 of the rotating mechanism 100. The main swing arm 31 includes a main rotating part 33 and a main sliding part 34. The main rotating part 33 includes two main rotating cylinders 36, and the main rotating cylinders 36 are provided with main rotating holes 38. The difference from the above embodiment is that the main swing arm 31 does not have an extension member 39.

[0220] refer to Figure 51 , Figure 51 yes Figure 45The diagram shows the structure of the secondary swing arm 41 of the rotating mechanism 100. The secondary swing arm 41 includes a secondary rotating part 42 and a secondary sliding part 43. The secondary rotating part 42 includes two secondary rotating cylinders 44. The secondary sliding part 43 has a supporting part, a secondary limiting member 47, and an auxiliary guide member 433. The supporting part includes a supporting notch 46, located on one side of the secondary sliding part 43 along the Y-axis direction. The supporting notch 46 penetrates the secondary sliding part 43 along the Z-axis direction, also penetrating one side of the secondary sliding part 43 along the Y-axis direction and the side of the secondary sliding part 43 away from the secondary rotating part 42. The inner wall surface opposite to the opening of the supporting notch 46 is the supporting surface 48. There are two secondary limiting members 47, spaced apart along the Y-axis direction. The auxiliary guide member 433 is fixed to the side of the secondary sliding part 43 away from the secondary rotating part 42 and is in the shape of a round rod. It is understandable that, in order to facilitate the processing of the secondary swing arm 41, the secondary swing arm 41 can be divided into a first part 411 and a second part 412. After the first part 411 and the second part 412 are processed respectively, they can be detachably connected.

[0221] refer to Figure 52 and Figure 53 , Figure 52 yes Figure 45 A schematic diagram of the auxiliary swing arm 61 of the rotating mechanism 100 shown in the figure. Figure 53 yes Figure 52 The diagram shows another structural view of the auxiliary swing arm 61. In this embodiment, a separate support plate 51 is not required. Instead, the auxiliary swing arm 61 supports the display screen 1300. Specifically, the auxiliary swing arm 61 includes a first support segment 615, an auxiliary segment 611, a connecting segment 612, a stop segment 613, and a second support segment 616, which are sequentially fixedly connected along the Y-axis. The upper surfaces of the first support segment 615, auxiliary segment 611, connecting segment 612, stop segment 613, and second support segment 616 are sequentially connected and flush to support the display screen 1300.

[0222] The auxiliary section 611 includes an auxiliary support portion 6111 and an auxiliary connecting portion 6112. The auxiliary support portion 6111 is fixed between the first support portion 615 and the connecting portion 612. The first support portion 615, auxiliary section 611, connecting portion 612, stop portion 613, and second support portion 616 are integrally formed. The upper surface of the auxiliary support portion 6111 supports the display screen 1300. The lower surface of the auxiliary support portion 6111 has a recessed auxiliary mounting groove 619, which also penetrates two opposite sides of the auxiliary support portion 6111 along the X-axis. The auxiliary connecting portion 6112 is installed within the auxiliary mounting groove 619. Specifically, the auxiliary support portion 6111 has a fixing hole 6113, which penetrates the bottom surface of the auxiliary mounting groove 619 and the upper surface of the auxiliary support portion 6111. The upper surface of the auxiliary connecting portion 6112 has a protruding fixing block 6114. The fixing block 6114 is fixed inside the fixing hole 6113 to fix the auxiliary support part 6111 and the auxiliary connecting part 6112. In some other embodiments, the auxiliary connecting part 6112 and the auxiliary support part 6111 can be fixed by fastener connection or welding. Alternatively, the auxiliary connecting part 6112 and the auxiliary support part 6111 can also be integrally formed.

[0223] The auxiliary swing arm 61 is provided with an auxiliary rotating component 62, an auxiliary rotating cylinder 64, an auxiliary guide groove 65, a guide opening 63, a stop surface 66, a first clearance notch 617, and a second clearance notch 618.

[0224] The auxiliary rotating component 62, the auxiliary rotating cylinder 64, and the auxiliary guide groove 65 are all disposed on the auxiliary connecting portion 6112. The auxiliary rotating component 62 and the auxiliary rotating cylinder 64 are located on opposite sides of the auxiliary connecting portion 6112 along the X-axis. A protruding block 69 is provided on the lower surface of the auxiliary connecting portion 6112, and the auxiliary guide groove 65 is disposed on the protruding block 69. The structure of the auxiliary rotating component 62, the auxiliary rotating cylinder 64, and the auxiliary guide groove 65 is the same as in the above embodiment, and will not be described again.

[0225] The guide opening 63 and the auxiliary rotating member 62 are opposite each other. Specifically, the guide opening 63 is provided in the auxiliary section 611 along the Z-axis direction, and the guide opening 63 passes through the auxiliary bearing part 6111 and the auxiliary connecting part 6112. The guide opening 63 is used to avoid the auxiliary protrusion 272.

[0226] A stop surface 66 is provided on a stop section 613. The stop section 613 has a stop notch that extends through the stop section 613 along the Z-axis and also extends through one side of the stop section 613. The stop surface 66 is the inner wall surface of the stop notch, and the openings of the stop surface 66 and the stop notch are opposite each other along the X-axis.

[0227] The first clearance notch 617 is provided in the auxiliary section 611, specifically in the auxiliary support portion 6111 of the auxiliary section 611. Along the Z-axis, the first clearance notch 617 penetrates the auxiliary support portion 6111 and also penetrates one side of the auxiliary support portion 6111. The first clearance notch 617 is used to avoid the main swing arm 31. The first clearance notch 617 and the stop notch are connected along the Y-axis.

[0228] The second clearance notch 618 is provided in the connecting section 612 along the Z-axis direction, and the second clearance notch 618 penetrates through the connecting section 612 and also penetrates one side of the connecting section 612. The second clearance notch 618 is used to avoid the auxiliary swing arm 41.

[0229] The stop notch, the first clearance notch 617, and the second clearance notch 618 are all located on the side of the auxiliary swing arm 61 facing the support base 10.

[0230] refer to Figure 54 and Figure 55 , Figure 54 This is a schematic diagram of the rotating mechanism 100 in the unfolded state according to the second embodiment of this application. Figure 55 yes Figure 54 The diagram shows a partial structural schematic of the rotating mechanism 100. Two mounting members 21 are respectively disposed on both sides of the support base 10. Two main swing arms 31 are rotatably connected to the support base 10, specifically, the main sliding part 34 is rotatably connected to the main rotating groove 15 of the support base 10. The two main swing arms 31 are rotatably connected to two auxiliary swing arms 61. Two secondary swing arms 41 are rotatably connected to the support base 10, and the two secondary swing arms 41 are slidably connected to the two mounting members 21, specifically, the secondary rotating part 42 is rotatably connected to the secondary rotating groove 16 of the support base 10, and the secondary sliding part 43 is slidably connected to the secondary sliding groove 23 of the mounting member 21.

[0231] Along the Z-axis, two auxiliary swing arms 61 are stacked on top of two mounting components 21, respectively. The two auxiliary swing arms 61 are rotatably connected to the two mounting components 21, respectively. The two auxiliary swing arms 61 are rotatably connected to the two main swing arms 31, respectively. The two auxiliary swing arms 61 are slidably and rotatably connected to the two secondary swing arms 41. The first clearance notch 617 is opposite to the main swing arm 31, and the second clearance notch 618 is opposite to the secondary swing arm 41.

[0232] When the foldable electronic device 1000 is in the unfolded state, the upper surface of the first housing 1210, the upper surface of the first auxiliary swing arm 61a, the upper surface of the support plate 12, the upper surface of the second auxiliary swing arm 61b, and the upper surface of the second housing 1220 are arranged sequentially along the X-axis to form an integral plane, which is used to support the display screen 1300.

[0233] refer to Figure 56 , Figure 57 and Figure 58 , Figure 56 This is a schematic diagram of the rotating mechanism 100 in a semi-expanded state according to the second embodiment of this application. Figure 57 This is a schematic diagram of the rotating mechanism 100 in the folded state provided in the second embodiment of this application. Figure 58 This is a partial structural diagram of the rotating mechanism 100 provided in the second embodiment of this application in a folded state. When the foldable electronic device 1000 switches between an unfolded state and a folded state, the main swing arm 31 rotates relative to the support base 10, and the main swing arm 31 also rotates relative to the auxiliary swing arm 61. The secondary swing arm 41 rotates relative to the support base 10, and the secondary swing arm 41 slides relative to the mounting member 21. (Reference) Figure 59 , Figure 59 This is a schematic diagram illustrating the process of the auxiliary active member and the auxiliary active hole cooperating when the rotating mechanism 100 provided in the second embodiment of this application switches from an unfolded state to a folded state. The auxiliary swing arm 61 rotates relative to the mounting member 21, specifically the auxiliary rotating member 62 rotates within the auxiliary rotating hole 24. (See reference) Figure 60 , Figure 60 This is a schematic diagram illustrating the process of the auxiliary rotating cylinder 64 and the main rotating cylinder 36 rotating around the connecting shaft 32 when the rotating mechanism 100 provided in the second embodiment of this application switches from an unfolded state to a folded state. The auxiliary swing arm 61 rotates relative to the main swing arm 31; specifically, both the auxiliary rotating cylinder 64 and the main rotating cylinder 36 rotate axially around the connecting shaft 32. (See reference...) Figure 61 , Figure 61 This is a schematic diagram illustrating the process of the auxiliary guide slide 433 and the auxiliary guide slide groove 65 cooperating when the rotating mechanism 100 provided in the second embodiment of this application switches from an unfolded state to a folded state. The auxiliary swing arm 61 slides and rotates relative to the secondary swing arm 41, specifically, the auxiliary guide slide 433 slides and rotates within the auxiliary guide slide groove 65. During the movement, the main swing arm 31 can extend into the first clearance notch 617, and the secondary swing arm 41 can extend into the second clearance notch 618, thereby avoiding interference between the main swing arm 31 and the auxiliary swing arm 61, as well as between the secondary swing arm 41 and the auxiliary swing arm 61, allowing the rotating mechanism 100 to operate smoothly.

[0234] When the foldable electronic device 1000 is in a folded state, the two auxiliary swing arms 61 and the support base 10 form a screen enclosure space.

[0235] In this embodiment, the mounting component 21 and the support base 10 are connected by two stages of swing arms: a main swing arm 31 and an auxiliary swing arm 61. This reduces the rotation angle of the main swing arm 31. When the rotation angle of the main swing arm 31 decreases, the rotation angle of the auxiliary swing arm 41 also decreases. The space saved by reducing the rotation angle of the auxiliary swing arm 41 can be used to increase the wall thickness of the auxiliary swing arm 41, thereby increasing its structural strength. And / or, the space saved by reducing the rotation angle of the auxiliary swing arm 41 can be used to increase the screen receiving space, thereby reducing the depth of the screen receiving groove on the upper surface of the support plate 12, or even eliminating the need for a screen receiving groove on the upper surface of the support plate 12, thus increasing the flatness of the upper surface of the support plate 12. This ensures that when the foldable electronic device 1000 is in the unfolded state, the display screen 1300 is reliably supported, improving the flatness of the display screen 1300, increasing the sensitivity of the display screen 1300, and reducing the risk of damage to the display screen 1300. Detailed principles can be found in the above embodiments and will not be repeated here.

[0236] refer to Figure 62 and Figure 63 , Figure 62 This is a schematic diagram illustrating the engagement process of the stop surface 66 and the abutment surface 48 when the rotating mechanism 100 provided in the second embodiment of this application switches from the unfolded state to the folded state. Figure 63 This is a schematic diagram showing the stop surface 66 and the abutment surface 48 facing each other when the rotating mechanism 100 provided in the second embodiment of this application is in a folded state. During the process of switching the foldable electronic device 1000 from an unfolded state to a folded state, the stop segment 613 gradually extends into the abutment notch 46. When the foldable electronic device 1000 is in a folded state, the stop segment 613 is located within the abutment notch 46, and the abutment surface 48 and the stop surface 66 face each other. When the foldable electronic device 1000 is in a folded state and the support base 10 is subjected to an external impact force, the abutment surface 48 and the stop surface 66 can abut against each other to support the mounting member 21 and the housing 1200, preventing the display screen 1300 from being squeezed. The detailed principle is as described in the above embodiment and will not be repeated here.

[0237] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotating mechanism applied to a foldable electronic device, the foldable electronic device including a display screen, characterized in that, include: Support base, Installation components, The main swing arm is rotatably connected to the support base; A secondary swing arm, which is rotatably connected to the support base and slidably connected to the mounting component; An auxiliary swing arm is rotatably connected to the mounting component, rotatably connected to the main swing arm, and slidably and rotatably connected to the secondary swing arm.

2. The rotating mechanism according to claim 1, characterized in that, The auxiliary swing arm is provided with an auxiliary guide groove, and the secondary swing arm is provided with an auxiliary guide component. The auxiliary guide component is slidably and rotatably connected to the auxiliary guide groove.

3. The rotating mechanism according to claim 1 or 2, characterized in that, The secondary swing arm includes a secondary sliding part, which is slidably connected to the mounting component.

4. The rotating mechanism according to any one of claims 1-3, characterized in that, An auxiliary rotating cylinder is provided on the side of the auxiliary swing arm facing the main swing arm, and a main rotating cylinder is provided on the side of the main swing arm facing the auxiliary swing arm. The auxiliary rotating cylinder is rotatably connected to the main rotating cylinder.

5. The rotating mechanism according to claim 4, characterized in that, The main swing arm includes two main rotating cylinders, which are arranged at intervals along the length of the rotating mechanism; the auxiliary rotating cylinder is located in the interval between the two main rotating cylinders, and the auxiliary rotating cylinder and the two main rotating cylinders are rotatably connected by a connecting shaft.

6. The rotating mechanism according to any one of claims 1-5, characterized in that, The mounting component has an auxiliary rotation hole on the side away from the main swing arm, and the auxiliary swing arm has an auxiliary rotating component on the side away from the main swing arm, and the auxiliary rotating component is rotatably connected to the auxiliary rotation hole.

7. The rotating mechanism according to any one of claims 1-6, characterized in that, The auxiliary swing arm is used to support the display screen.

8. The rotating mechanism according to any one of claims 1-7, characterized in that, The auxiliary swing arm further includes an auxiliary section, which is rotatably connected to the mounting component, rotatably connected to the main swing arm, and slidably and rotatably connected to the secondary swing arm.

9. The rotating mechanism according to claim 8, characterized in that, The auxiliary guide groove is provided in the auxiliary section.

10. The rotating mechanism according to claim 9, characterized in that, The auxiliary guide slide is disposed on the side of the secondary sliding part facing the auxiliary section, and the auxiliary guide slide groove is disposed on the side of the auxiliary section facing the secondary sliding part.

11. The rotating mechanism according to claim 9 or 10, characterized in that, The auxiliary section has a protrusion on the side facing the mounting component, and the auxiliary guide groove is disposed on the protrusion.

12. The rotating mechanism according to claim 11, characterized in that, The mounting component is provided with a mounting through hole, which extends through the mounting component along the thickness direction of the rotating mechanism; when the rotating mechanism is in a folded state, the protrusion is located inside the mounting through hole.

13. The rotating mechanism according to any one of claims 8-12, characterized in that, The auxiliary rotating cylinder is disposed on the side of the auxiliary section facing the main swing arm, and the main rotating cylinder is disposed on the side of the main swing arm facing the auxiliary section.

14. The rotating mechanism according to any one of claims 8-13, characterized in that, The auxiliary rotating component is located on the side of the auxiliary section away from the main swing arm.

15. The rotating mechanism according to any one of claims 8-14, characterized in that, The auxiliary swing arm also includes a first bearing section and a second bearing section, which are located on both sides of the auxiliary section.

16. The rotating mechanism according to any one of claims 8-15, characterized in that, The auxiliary section includes an auxiliary support portion and an auxiliary connecting portion. The auxiliary support portion is located between the first support section and the second support section, and the auxiliary connecting portion is fixed to the side of the auxiliary support portion facing the mounting component.

17. The rotating mechanism according to claim 16, characterized in that, The auxiliary rotating component, the auxiliary rotating cylinder, and the auxiliary guide groove are all disposed on the auxiliary connecting part.

18. The rotating mechanism according to claim 16 or 17, characterized in that, The first load-bearing section, the auxiliary load-bearing part, and the second load-bearing section are integrally formed.

19. The rotating mechanism according to any one of claims 8-18, characterized in that, The first support segment, the auxiliary segment, and the second support segment are used to support the display screen.

20. The rotating mechanism according to any one of claims 8-19, characterized in that, The surfaces of the first support section, the auxiliary section, and the second support section opposite to the mounting member are flush to support the display screen.

21. The rotating mechanism according to claims 1-20, characterized in that, Along the thickness direction of the rotating mechanism, the auxiliary swing arm is stacked on the mounting member; along the width direction of the rotating mechanism, the main swing arm is located between the mounting member and the support base.

22. The rotating mechanism according to any one of claims 1-21, characterized in that, The auxiliary swing arm is provided with a bearing surface; The auxiliary swing arm also includes a stop section, which is fixedly connected to the auxiliary section along the length of the rotating mechanism, and the stop section is provided with a stop surface; The rotating mechanism includes an unfolded state and a folded state. When the rotating mechanism is in the folded state, the abutting surface and the stop surface are opposite each other.

23. The rotating mechanism according to claim 22, characterized in that, The auxiliary swing arm is provided with a supporting notch, and the supporting surface includes the inner wall surface of the supporting notch; The stop surface includes the outer surface of the stop segment; When the rotating mechanism is in a folded state, the stop section is located within the abutment notch, so that the abutment surface and the stop surface are opposite each other.

24. The rotating mechanism according to any one of claims 3-23, characterized in that, The secondary sliding part is provided with a first support member, and the first support member and the auxiliary guide member are arranged at intervals along the length direction of the rotating mechanism; The auxiliary swing arm is provided with a second support member, and the second support member and the auxiliary guide groove are arranged at intervals along the length direction of the rotating mechanism. When the rotating mechanism is in a folded state, the first support member and the second support member abut against each other.

25. The rotating mechanism according to claim 24, characterized in that, The auxiliary sliding part is provided with a retaining notch. Along the length direction of the rotating mechanism, the retaining notch is located on the side of the auxiliary guide slide that is away from the auxiliary section. The inner wall surface of the retaining notch includes a first side surface and a retaining surface. The auxiliary swing arm further includes a stop section. Along the length direction of the rotating mechanism, the stop section is fixedly connected to the auxiliary section. Along the thickness direction of the rotating mechanism, the stop section is stacked on the mounting component. The outer surface of the stop section includes an auxiliary end face and a stop face. The first support member protrudes from the first side surface; the second support member protrudes from the auxiliary end face. When the rotating mechanism is in a folded state, the stop section is located within the abutment notch. Along the width direction of the rotating mechanism, the stop surface and the abutment surface are opposite each other. Along the length direction of the rotating mechanism, the first side surface and the auxiliary end surface are opposite each other, and the first support member and the second support member abut against each other.

26. The rotating mechanism according to claim 25, characterized in that, The secondary sliding part is also provided with a first limiting member, which is located between the abutment notch and the auxiliary guide member along the length direction of the rotating mechanism; The mounting component is provided with a secondary sliding groove, and the secondary sliding part is slidably connected to the secondary sliding groove. The secondary sliding groove is provided with a first limiting protrusion. The first limiting protrusion and the bottom surface of the secondary sliding groove cooperate to form a first limiting interval, and the first limiting component is located within the first limiting interval.

27. The rotating mechanism according to claim 26, characterized in that, The mounting component has a second notch on the side away from the support base, and the second notch communicates with the secondary sliding groove along the width direction of the rotating mechanism; The auxiliary swing arm further includes a connecting section, which connects the auxiliary section and the stop section; the connecting section is located within the second notch and is provided with a clearance through hole; along the width direction of the rotating mechanism, the connecting section and the first limiting protrusion are opposite each other, and the clearance through hole is connected to the secondary sliding groove; When the rotating mechanism is in the unfolded state, the first limiting member extends into the clearance through hole.

28. The rotating mechanism according to any one of claims 6-27, characterized in that, The mounting component has an auxiliary protrusion on the side facing the auxiliary swing arm; along the thickness direction of the rotating mechanism, the auxiliary rotating hole passes through the auxiliary protrusion and the side of the mounting component away from the auxiliary swing arm; The auxiliary swing arm is provided with a guide opening, and the auxiliary protrusion is located inside the guide opening.

29. The rotating mechanism according to claims 15-28, characterized in that, The auxiliary swing arm further includes a connecting section and a stop section, and the first load-bearing section, the auxiliary load-bearing part, the connecting section, the stop section and the second load-bearing section are fixedly connected in sequence.

30. The rotating mechanism according to any one of claims 1 to 14, characterized in that, The rotating mechanism further includes a support plate, which is stacked on the mounting member along the thickness direction of the rotating mechanism. The auxiliary swing arm is located between the support plate and the mounting member. The support plate is rotatably connected to the mounting member, and the support plate is slidably and rotatably connected to the main swing arm.

31. A foldable electronic device, characterized in that, The device includes a display screen, two housings, and a rotating mechanism as described in any one of claims 1 to 30. The rotating mechanism is disposed between the two housings and is connected to each of the two housings. The two housings are capable of rotating relative to each other via the rotating mechanism. The display screen is mounted on the two housings and the rotating mechanism.

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