Electronic device and folding mechanism

Abstract

An electronic device and a folding mechanism, the folding mechanism of the electronic device comprising a main shaft, a first support, a second support, a first swing arm, a second swing arm, a first synchronous gear and a second synchronous gear. The first swing arm is rotationally connected to the main shaft and slidingly connected to the first support, and the second swing arm is rotationally connected to the main shaft and slidingly connected to the second support. The first synchronous gear is rotationally connected to the main shaft, and comprises a first tooth portion and a second tooth portion with different radii of the addendum circle; the second synchronous gear is rotationally connected to the main shaft, and comprises a third tooth portion and a fourth tooth portion with different radii of the addendum circle, and the second tooth portion meshes with the third tooth portion. The application flexibly configures the space of the folding mechanism occupied by the synchronous gear by setting the synchronous gear to comprise two tooth portions with different radii of the addendum circle, so as to avoid the synchronous gear from abutting against the flexible display screen or hindering the movement of the door panel.

Description

[0001] This application is a divisional application. The original application has the application number 202380025789.3 and the original application date is September 26, 2023. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of foldable electronic products technology, and more particularly to an electronic device and a folding mechanism. Background Technology

[0003] With the development of flexible display technology, foldable electronic devices based on flexible displays have become an emerging technological innovation point in the industry. Current flexible display foldable devices are trending towards miniaturization, and ensuring the synchronization of foldable devices within a limited space is of great importance.

[0004] Existing synchronous gears have the same tooth tip circle for each individual synchronous gear, which results in insufficient flexibility in space occupation. Some teeth of the synchronous gear may abut against the flexible display screen or obstruct the movement of the door panel, which can easily damage the flexible display screen or affect the movement of the folding mechanism. Summary of the Invention

[0005] This application provides an electronic device and a folding mechanism. By configuring a synchronous gear with two teeth of different radii for their tip circles, the space occupied by the synchronous gear in the folding mechanism is flexibly configured. This avoids the synchronous gear pressing against the flexible display screen during folding, thus preventing damage to the flexible display screen, or obstructing the movement of the door panel, thereby affecting the folding or opening of the electronic device.

[0006] In a first aspect, embodiments of this application provide an electronic device. The electronic device includes a first housing, a second housing, a folding mechanism, and a flexible display screen. The first housing, the second housing, and the folding mechanism jointly support the flexible display screen. The folding mechanism includes a main shaft, a first support, a second support, a first swing arm, a second swing arm, a first synchronous gear, and a second synchronous gear. The first swing arm includes a first rotating end and a first sliding end. The first rotating end is rotatably connected to the main shaft, and the first sliding end is slidably connected to the first support. The first housing is fixedly connected to the first support. The second swing arm includes a second rotating end and a second sliding end. The second rotating end is rotatably connected to the main shaft, and the second sliding end is slidably connected to the second support. The second housing is fixedly connected to the second support. It is understood that the folding mechanism is located between the first housing and the second housing. The first synchronous gear and the second synchronous gear are used to make the first swing arm and the second swing arm move synchronously; the first synchronous gear is rotatably connected to the main shaft, and the first synchronous gear includes a first tooth and a second tooth, the radius of the tip circle of the first tooth is different from the radius of the tip circle of the second tooth; the second synchronous gear is rotatably connected to the main shaft, and the second synchronous gear includes a third tooth and a fourth tooth, the radius of the tip circle of the third tooth is different from the radius of the tip circle of the fourth tooth, and the third tooth meshes with the second tooth.

[0007] Here, the addendum circle refers to the circle containing the tip of the tooth. The radius of the addendum circle is the distance from the tip of the tooth to the center of rotation. In the embodiments of this application, the first rotating end of the first swing arm and the second rotating end of the second swing arm are connected by a first synchronous gear and a second synchronous gear meshing, so that the rotation angle of the first rotating end of the first swing arm and the rotation angle of the second rotating end of the second swing arm are the same in magnitude and opposite in direction, so that the rotation of the first swing arm and the second swing arm relative to the main shaft remains synchronized, that is, they move closer to each other or further away from each other synchronously.

[0008] Understandably, the radius of the tip circle of the first tooth can be greater than or less than the radius of the tip circle of the second tooth, and the radius of the tip circle of the fourth tooth can be greater than or less than the radius of the tip circle of the third tooth.

[0009] In this embodiment, the first synchronizing gear includes two tooth sections, namely a first tooth section and a second tooth section, and the second synchronizing gear includes two tooth sections, namely a third tooth section and a fourth tooth section. The addendum circles of the two tooth sections of the first synchronizing gear can have different dimensions, and the addendum circles of the two tooth sections of the second synchronizing gear can also have different dimensions. This allows for adjustments to the dimensions of the different tooth sections of the synchronizing gears, the rotation center of the first synchronizing gear, and the rotation center of the second synchronizing gear, based on the space and structure of the folding mechanism. This makes the use of space by the first and second synchronizing gears within the folding mechanism more flexible, facilitating full utilization of the internal space of the folding mechanism. Understandably, with the miniaturization of electronic devices and folding mechanisms, the internal space of the folding mechanism is limited. By setting the addendum circle dimensions of the two tooth sections of the first synchronizing gear and the two tooth sections of the second synchronizing gear to be different, this application can achieve a reasonable configuration of the rotation centers of the first rotating end, the first synchronizing gear, the second synchronizing gear, and the second rotating end within a limited space, maximizing space utilization. For example, in some embodiments, if the screen space is limited in the folded state, the tooth tip circles of the second and third teeth can be set to be smaller in size to avoid the second and third teeth from abutting the flexible display screen in the folded state; if the door panel is to avoid movement of the folding mechanism, the tooth tip circles of the first and fourth teeth can be set to be smaller in size.

[0010] In one possible implementation, the first tooth engages with the first rotating end, and the fourth tooth engages with the second rotating end.

[0011] In one possible implementation, the spindle includes a first side and a second side disposed opposite to each other, the first side being the external side of the spindle, and the second side being closer to the flexible display screen relative to the first side; the radius of the tip circle of the first tooth is greater than the radius of the tip circle of the second tooth, and the radius of the tip circle of the fourth tooth is greater than the radius of the tip circle of the third tooth; during the process of the folding mechanism folding from the open state to the closed state, the second tooth moves toward the second side, and the third tooth moves toward the second side.

[0012] In this embodiment, by setting the radius of the tip circle of the first tooth to be larger than that of the second tooth, and the radius of the tip circle of the fourth tooth to be larger than that of the third tooth, it is advantageous to use as few synchronous gears as possible. This allows for synchronous movement of the first and second swing arms and the first and second supports, and also prevents the second and third teeth of the first and second synchronous gears from abutting against the flexible display screen when the folding mechanism is in the closed state, thus avoiding damage to the flexible display screen and increasing the screen-accommodating space. Furthermore, the larger tip circle of the first tooth in this application is used to mesh with the first swing arm, and the larger tip circle of the fourth tooth is used to mesh with the second swing arm. The larger tip circles of the first and fourth teeth help reduce the number of synchronous gears and increase movement accuracy. In other words, this embodiment can provide as much screen-accommodating space as possible with as few synchronous gears as possible. This ensures that, in the context of minimizing electronic device designs, the first and second supports of the folding mechanism can be folded or opened synchronously within a limited space without damaging the flexible display screen. The fewer the number of synchronizing gears and the larger their size, the smaller the cumulative transmission error, which helps improve motion accuracy.

[0013] In one possible implementation, the radius of the tip circle of the first tooth is larger than the radius of the tip circle of the first rotating end, and the radius of the tip circle of the fourth tooth is larger than the radius of the tip circle of the second rotating end. This ensures that during the folding or opening process of the folding mechanism, the rotation angle of the first tooth is smaller than the rotation angle of the first swing arm, and the rotation angle of the fourth tooth is smaller than the rotation angle of the second swing arm. This helps to prevent the first and fourth teeth, which have larger tip circle sizes, from obstructing the movement of the first and second door panels and hindering the opening or folding of the folding mechanism due to excessive rotation angle.

[0014] In one possible implementation, the distance between the rotation center of the first rotating end and the rotation center of the first synchronous gear is a first distance, and the distance between the rotation center of the first synchronous gear and the rotation center of the second synchronous gear is a second distance. The first distance is greater than the second distance, which helps to reserve sufficient space for the setting of the first tooth of the first rotating end and the first tooth of the first synchronous gear. The size of the tooth tip circle of the first tooth can be increased as needed to reduce the rotation angle of the first tooth during the folding or opening process of the folding mechanism, and to avoid the first tooth hitting the first door panel during rotation. In addition, by setting the distance between the rotation center of the first rotating end and the rotation center of the first synchronous gear to be larger, it is beneficial to set the rotation center of the first rotating end to be located on the side of the plane where the first door panel is located away from the flexible display screen when the folding mechanism is in the closed state, which helps to avoid the first tooth colliding with the first door panel and also helps to increase the screen-accommodating space of the folding mechanism.

[0015] In one possible implementation, the distance between the rotation center of the second rotating end and the rotation center of the second synchronous gear is a third distance, the distance between the rotation center of the first synchronous gear and the rotation center of the second synchronous gear is a second distance, and the third distance is greater than the second distance.

[0016] In one possible implementation, the first synchronous gear includes a first toothless portion and a second toothless portion, which are spaced apart. Both the first and second toothless portions are located between and spaced relative to each other. The first toothless portion is closer to the first side than the second toothless portion, and the second toothless portion is closer to the second side than the first toothless portion. The curvature of the first toothless portion is greater than that of the second toothless portion. By setting the curvature of the first toothless portion to be greater than that of the second toothless portion, multiple teeth of the second toothed portion are prevented from abutting against the bottom of the outer cover plate when the folding mechanism is in the unfolded state. This helps to reduce the space occupied by the first synchronous gear in the thickness direction of the electronic device when unfolded.

[0017] In one possible implementation, the first synchronizing gear includes a first toothless portion and a second toothless portion, the first toothed portion and the second toothed portion being spaced apart, the first toothless portion and the second toothless portion being located between the first toothed portion and the second toothed portion and being spaced apart from each other, the first toothless portion being closer to the first side than the second toothless portion, and the second toothless portion being closer to the second side than the first toothless portion; the tooth connecting the first toothed portion and the first toothless portion is the first tooth, the tooth connecting the second toothed portion and the first toothless portion is the second tooth, the tooth connecting the first toothed portion and the second toothless portion is the third tooth, and the tooth connecting the second toothed portion and the second toothless portion is the fourth tooth, the distance between the tip of the first tooth and the tip of the second tooth is greater than the distance between the tip of the third tooth and the tip of the fourth tooth.

[0018] In one possible implementation, the folding mechanism includes a first door panel and a second door panel, located on the second side. When the folding mechanism is in the open state, the first support surface of the first door panel is flush with the second support surface of the second door panel. When the folding mechanism is in the closed state, the first support surface of the first door panel and the second support surface of the second door panel are opposite to each other and are far apart from each other in the direction close to the main shaft. When the folding mechanism is in the closed state, the rotation center of the first rotating end is located on the side of the plane where the first door panel is located away from the flexible display screen, and the rotation center of the second rotating end is located on the side of the plane where the second door panel is located away from the flexible display screen. In this embodiment, by setting the rotation center of the rotating end on the side of the door panel away from the flexible display screen, it is beneficial to form a teardrop-shaped screen-accommodating space in the folded state and to increase the screen-accommodating space. When folding from an unfolded state to a closed state, the rotation angle of the door panel is generally greater than that of the swing arm. If the rotation center of the rotating end is on the side of the door panel facing the flexible display screen, when the electronic device is folded to the same state (compared to when the rotation center of the rotating end is on the side of the door panel away from the flexible display screen), the door panel needs to rotate a larger angle, which reduces the screen space. Furthermore, if the rotation center of the rotating end is on the side of the door panel facing the flexible display screen, the swing arm and door panel are more prone to positional interference, requiring greater clearance between them. In this embodiment, by setting the rotation center of the rotating end to always be on the side of the door panel away from the flexible display screen, the probability of interference between the two is low.

[0019] In one possible implementation, the folding mechanism includes a first door panel and a second door panel located on the second side. When the folding mechanism is in the open state, the first support surface of the first door panel is flush with the second support surface of the second door panel. When the folding mechanism is in the closed state, the first support surface of the first door panel and the second support surface of the second door panel are opposite to each other and are far apart from each other in the direction close to the main shaft. When the folding mechanism is in the open state, the vertical projection of the first synchronous gear on the plane where the first door panel is located at least partially overlaps with the first door panel, and the vertical projection of the second synchronous gear on the plane where the second door panel is located at least partially overlaps with the second door panel. During the process of folding the folding mechanism from the open state to the closed state, the first tooth moves closer to the first side, and the fourth tooth moves closer to the first side. When the folding mechanism is folded from the unfolded state to the closed state, the first tooth rotates towards the first side of the main shaft and away from the flexible display screen, and the fourth tooth rotates towards the first side of the main shaft and away from the flexible display screen to avoid the first door panel, the second door panel, and the flexible display screen.

[0020] In one possible implementation, the folding mechanism includes a first door panel, a second door panel, a first moving member, and a second moving member. The first moving member is rotatably connected to the main shaft and rotatably connected to the first bracket. The second rotating member is rotatably connected to the main shaft and rotatably connected to the second bracket. The first door panel is fixedly connected to the first moving member, and the second door panel is fixedly connected to the second moving member. Since the first door panel is fixed to the first moving member and the second door panel is fixed to the second moving member, during the relative unfolding or folding process of the folding mechanism, neither the first door panel nor the second door panel rotates relative to the first moving member. This avoids the first tooth with a larger tip circle size abutting against the first door panel and hindering its movement, or the fourth tooth with a larger tip circle size abutting against the second door panel and hindering its movement, during the relative folding or opening process of the folding mechanism. This allows the first and second door panels to avoid the first and fourth teeth during the relative folding or opening process of the folding mechanism.

[0021] In one possible implementation, the main shaft includes an outer cover plate, with the first side being the outer side of the outer cover plate. The folding mechanism includes a first locking member, a second locking member, a fixing element, and an elastic element. The second locking member is located between the first locking member and the fixing element. The first synchronous gear and the second synchronous gear are located between the first locking member and the second locking member. The elastic element is located between the second locking member and the fixing element. Both the first locking member and the fixing element are fixed to the outer cover plate. The damping mechanism includes a first locking member, a second locking member, a fixing element, and an elastic element. In this application, both the first locking member and the fixing element are fixed to the outer cover plate. During the rotation of the swing arm, only the second locking member moves, while the first locking member and the fixing element remain stationary, thus ensuring the stability of the damping mechanism in this embodiment.

[0022] In one possible implementation, the surface of the first locking member facing the second locking member is a smooth surface; the end of the second locking member facing the first locking member is provided with a plurality of spaced-apart protrusion groups, each protrusion group including a plurality of protrusions, the plurality of protrusions arranged in a ring and spaced apart, and a first locking groove is formed between adjacent protrusions; the end of the first synchronous gear facing the second locking member is provided with a plurality of first protrusions, and the side of the second synchronous gear facing the second locking member is provided with a plurality of second protrusions; the plurality of first protrusions engage with the first locking groove of one protrusion group, and the plurality of second protrusions engage with the first locking groove of another protrusion group. The smooth surface of the first locking member facing the second locking member can be understood as the absence of any protruding structure on the side of the first locking member facing the second locking member, and the side of the first locking member facing the second locking member may include multiple parts, each of which is smooth. In this embodiment, by setting the surface of the first locking member facing the second locking member to be a smooth surface and providing a plurality of spaced-apart protrusion groups at the end of the second locking member facing the first locking member, rotational resistance is reduced.

[0023] In one possible implementation, the first locking member includes a body and a protrusion. The protrusion is located on the side of the body facing the second locking member. The side of the first rotating end facing the first locking member includes a first abutting portion and a second abutting portion. The second abutting portion protrudes from the first abutting portion and abuts against the body. A portion of the first abutting portion abuts against the protrusion, and a gap exists between the other portion of the first abutting portion and the body. In this embodiment, by setting a gap between the portion of the structure at the end of the first rotating end facing the first locking member and the first locking member, the contact area can be reduced, thus reducing friction. If the contact area between the end of the first rotating end facing the first locking member and the first locking member is too small, there is no tactile feedback when folding or opening. If the contact area is too large, it is difficult to fold or open. This application can adjust the contact area by adjusting the gap between the end of the first rotating end facing the first locking member and the first locking member, thereby controlling the tactile feedback when folding or opening the electronic device.

[0024] In one possible implementation, the folding mechanism includes a first moving member rotatably connected to the first support and the main shaft.

[0025] In one possible implementation, the first moving member is slidably connected to the first bracket. The rotatable connection and slidable connection of the first moving member to the first bracket makes the connection between the first bracket and the first moving member more stable.

[0026] In one possible implementation, the folding mechanism includes a first moving member slidably connected to the first bracket and rotatably connected to the main shaft.

[0027] In one possible implementation, one end of the first moving member is provided with a third arc-shaped groove and a first hole spaced apart, and one end of the first bracket is provided with a first arc-shaped strip and a first shaft. The first arc-shaped strip engages with the third arc-shaped groove and can move within the third arc-shaped groove. The first shaft passes through the first hole and can slide within the first hole. By setting the first shaft to engage with the first hole, the first arc-shaped strip of the first bracket can be prevented from disengaging when moving within the third arc-shaped groove of the first moving member, without affecting the relative folding or opening of the first bracket and the first moving member.

[0028] In one possible implementation, the first door panel includes a first edge and a second edge disposed opposite to each other. When the folding mechanism is in the open state, the second edge is close to the second door panel. The second edge includes a first avoidance structure located on the side of the first door panel away from the flexible display screen. The first avoidance structure helps to prevent the first tooth from colliding with the first door panel and the fourth tooth from colliding with the second door panel.

[0029] In one possible implementation, the first avoidance structure includes a slope facing the side of the first door panel away from the flexible display screen. In other implementations, the first avoidance structure can be an L-shaped recess, and the second avoidance structure can be an L-shaped recess. This application does not limit the specific structure of the first and second avoidance structures.

[0030] Secondly, this application provides a folding mechanism, including a main shaft, a first support, a second support, a first swing arm, a second swing arm, a first synchronous gear, and a second synchronous gear; the first swing arm includes a first rotating end and a first sliding end, the first rotating end being rotatably connected to the main shaft, and the first sliding end being slidably connected to the first support; the second swing arm includes a second rotating end and a second sliding end, the second rotating end being rotatably connected to the main shaft, and the second sliding end being slidably connected to the second support; the first synchronous gear and the second synchronous gear are used to make the first swing arm and the second swing arm move synchronously; the first synchronous gear is rotatably connected to the main shaft, and the first synchronous gear includes a first tooth and a second tooth, the radius of the tip circle of the first tooth being different from the radius of the tip circle of the second tooth; the second synchronous gear is rotatably connected to the main shaft, and the second synchronous gear includes a third tooth and a fourth tooth, the radius of the tip circle of the third tooth being different from the radius of the tip circle of the fourth tooth, and the third tooth meshing with the second tooth.

[0031] In this embodiment, the first rotating end of the first swing arm and the second rotating end of the second swing arm are connected by a first synchronous gear and a second synchronous gear, so that the rotation angle of the first rotating end of the first swing arm and the rotation angle of the second rotating end of the second swing arm are the same in magnitude and opposite in direction, so that the rotation of the first swing arm and the second swing arm relative to the main shaft is synchronized, that is, they move closer to each other or further away from each other synchronously.

[0032] Understandably, the radius of the tip circle of the first tooth can be greater than or less than the radius of the tip circle of the second tooth, and the radius of the tip circle of the fourth tooth can be greater than or less than the radius of the tip circle of the third tooth.

[0033] In this embodiment, the first synchronizing gear includes two tooth sections, namely a first tooth section and a second tooth section, and the second synchronizing gear includes two tooth sections, namely a third tooth section and a fourth tooth section. The addendum circles of the two tooth sections of the first synchronizing gear can have different dimensions, and the addendum circles of the two tooth sections of the second synchronizing gear can also have different dimensions. This allows for adjustments to the dimensions of the different tooth sections of the synchronizing gears, the rotation center of the first synchronizing gear, and the rotation center of the second synchronizing gear, based on the space and structure of the folding mechanism. This makes the use of space by the first and second synchronizing gears within the folding mechanism more flexible, facilitating full utilization of the internal space of the folding mechanism. Understandably, with the miniaturization of electronic devices and folding mechanisms, the internal space of the folding mechanism is limited. This application, by setting the addendum circle dimensions of the two tooth sections of the first synchronizing gear and the two tooth sections of the second synchronizing gear to be different, achieves a reasonable configuration of the rotation centers of the first rotating end, the first synchronizing gear, the second synchronizing gear, and the second rotating end within a limited space, maximizing space utilization. For example, in some embodiments, if the screen space is limited in the folded state, the tooth tip circles of the second and third teeth can be set to be smaller in size to avoid the second and third teeth from abutting the flexible display screen in the folded state; if the door panel is to avoid movement of the folding mechanism, the tooth tip circles of the first and fourth teeth can be set to be smaller in size.

[0034] In one possible implementation, the first tooth engages with the first rotating end, and the fourth tooth engages with the second rotating end.

[0035] In one possible implementation, the spindle includes a first side and a second side disposed opposite to each other, the first side being the external side of the spindle, and the second side being closer to the flexible display screen relative to the first side; the radius of the tip circle of the first tooth is greater than the radius of the tip circle of the second tooth, and the radius of the tip circle of the fourth tooth is greater than the radius of the tip circle of the third tooth; during the process of the folding mechanism folding from the open state to the closed state, the second tooth moves toward the second side, and the third tooth moves toward the second side.

[0036] In this embodiment, by setting the radius of the tip circle of the first tooth to be larger than that of the second tooth, and the radius of the tip circle of the fourth tooth to be larger than that of the third tooth, it is advantageous to use as few synchronous gears as possible. This allows for synchronous movement of the first and second swing arms and the first and second supports, and also prevents the second and third teeth of the first and second synchronous gears from abutting against the flexible display screen when the folding mechanism is in the closed state, thus avoiding damage to the flexible display screen and increasing the screen-accommodating space. Furthermore, the larger tip circle of the first tooth in this application is used to mesh with the first swing arm, and the larger tip circle of the fourth tooth is used to mesh with the second swing arm. The larger tip circles of the first and fourth teeth help reduce the number of synchronous gears and increase movement accuracy. In other words, this embodiment can provide as much screen-accommodating space as possible with as few synchronous gears as possible. This ensures that, in the context of minimizing electronic device designs, the first and second supports of the folding mechanism can be folded or opened synchronously within a limited space without damaging the flexible display screen. The fewer the number of synchronizing gears and the larger their size, the smaller the cumulative transmission error, which helps improve motion accuracy.

[0037] In one possible implementation, the radius of the tip circle of the first tooth is larger than the radius of the tip circle of the first rotating end, and the radius of the tip circle of the fourth tooth is larger than the radius of the tip circle of the second rotating end. This makes it so that during the folding or opening process of the folding mechanism, the rotation angle of the first tooth is smaller than the rotation angle of the first swing arm, and the rotation angle of the fourth tooth is smaller than the rotation angle of the second swing arm. This helps to prevent the first tooth and the fourth tooth, which have larger tip circle sizes, from obstructing the movement of the first door panel and the second door panel due to excessive rotation angle during the rotation process, thus hindering the opening or folding of the folding mechanism.

[0038] In one possible implementation, the distance between the rotation center of the first rotating end and the rotation center of the first synchronous gear is a first distance, and the distance between the rotation center of the first synchronous gear and the rotation center of the second synchronous gear is a second distance. The first distance is greater than the second distance, which helps to reserve sufficient space for the setting of the first tooth of the first rotating end and the first tooth of the first synchronous gear. The size of the tooth tip circle of the first tooth can be increased as needed to reduce the rotation angle of the first tooth during the folding or opening process of the folding mechanism, and to avoid the first tooth hitting the first door panel during rotation. In addition, by setting the distance between the rotation center of the first rotating end and the rotation center of the first synchronous gear to be larger, it is beneficial to set the rotation center of the first rotating end to be located on the side of the plane where the first door panel is located away from the flexible display screen when the folding mechanism is in the closed state, which helps to avoid the first tooth colliding with the first door panel and also helps to increase the screen-accommodating space of the folding mechanism.

[0039] In one possible implementation, the distance between the rotation center of the second rotating end and the rotation center of the second synchronous gear is a third distance, the distance between the rotation center of the first synchronous gear and the rotation center of the second synchronous gear is a second distance, and the third distance is greater than the second distance.

[0040] In one possible implementation, the first synchronous gear includes a first toothless portion and a second toothless portion, which are spaced apart. Both the first and second toothless portions are located between and spaced relative to each other. The first toothless portion is closer to the first side than the second toothless portion, and the second toothless portion is closer to the second side than the first toothless portion. The curvature of the first toothless portion is greater than that of the second toothless portion. By setting the curvature of the first toothless portion to be greater than that of the second toothless portion, multiple teeth of the second toothed portion are prevented from abutting against the bottom of the outer cover plate when the folding mechanism is in the unfolded state. This helps to reduce the space occupied by the first synchronous gear in the thickness direction of the electronic device when unfolded.

[0041] In one possible implementation, the first synchronizing gear includes a first toothless portion and a second toothless portion, the first toothed portion and the second toothed portion being spaced apart, the first toothless portion and the second toothless portion being located between the first toothed portion and the second toothed portion and being spaced apart from each other, the first toothless portion being closer to the first side than the second toothless portion, and the second toothless portion being closer to the second side than the first toothless portion; the tooth connecting the first toothed portion and the first toothless portion is the first tooth, the tooth connecting the second toothed portion and the first toothless portion is the second tooth, the tooth connecting the first toothed portion and the second toothless portion is the third tooth, and the tooth connecting the second toothed portion and the second toothless portion is the fourth tooth, the distance between the tip of the first tooth and the tip of the second tooth is greater than the distance between the tip of the third tooth and the tip of the fourth tooth.

[0042] In one possible implementation, the folding mechanism includes a first door panel and a second door panel, located on the second side. When the folding mechanism is in the open state, the first support surface of the first door panel is flush with the second support surface of the second door panel. When the folding mechanism is in the closed state, the first support surface of the first door panel and the second support surface of the second door panel are opposite to each other and are far apart from each other in the direction close to the main shaft. When the folding mechanism is in the closed state, the rotation center of the first rotating end is located on the side of the plane where the first door panel is located away from the flexible display screen, and the rotation center of the second rotating end is located on the side of the plane where the second door panel is located away from the flexible display screen. In this embodiment, by setting the rotation center of the rotating end on the side of the door panel away from the flexible display screen, it is beneficial to form a teardrop-shaped screen-accommodating space in the folded state and to increase the screen-accommodating space. When folding from an unfolded state to a closed state, the rotation angle of the door panel is generally greater than that of the swing arm. If the rotation center of the rotating end is on the side of the door panel facing the flexible display screen, when the electronic device is folded to the same state (compared to when the rotation center of the rotating end is on the side of the door panel away from the flexible display screen), the door panel needs to rotate a larger angle, which reduces the screen space. Furthermore, if the rotation center of the rotating end is on the side of the door panel facing the flexible display screen, the swing arm and door panel are more prone to positional interference, requiring greater clearance between them. In this embodiment, by setting the rotation center of the rotating end to always be on the side of the door panel away from the flexible display screen, the probability of interference between the two is low.

[0043] In one possible implementation, the folding mechanism includes a first door panel and a second door panel located on the second side. When the folding mechanism is in the open state, the first support surface of the first door panel is flush with the second support surface of the second door panel. When the folding mechanism is in the closed state, the first support surface of the first door panel and the second support surface of the second door panel are opposite to each other and are far apart from each other in the direction close to the main shaft. When the folding mechanism is in the open state, the vertical projection of the first synchronous gear on the plane where the first door panel is located at least partially overlaps with the first door panel, and the vertical projection of the second synchronous gear on the plane where the second door panel is located at least partially overlaps with the second door panel. During the process of folding the folding mechanism from the open state to the closed state, the first tooth moves closer to the first side, and the fourth tooth moves closer to the first side. When the folding mechanism is folded from the unfolded state to the closed state, the first tooth rotates towards the first side of the main shaft and away from the flexible display screen, and the fourth tooth rotates towards the first side of the main shaft and away from the flexible display screen to avoid the first door panel, the second door panel, and the flexible display screen.

[0044] In one possible implementation, the folding mechanism includes a first door panel, a second door panel, a first moving member, and a second moving member. The first moving member is rotatably connected to the main shaft and rotatably connected to the first bracket. The second rotating member is rotatably connected to the main shaft and rotatably connected to the second bracket. The first door panel is fixedly connected to the first moving member, and the second door panel is fixedly connected to the second moving member. Since the first door panel is fixed to the first moving member and the second door panel is fixed to the second moving member, during the relative unfolding or folding process of the folding mechanism, neither the first door panel nor the second door panel rotates relative to the first moving member. This avoids the first tooth with a larger tip circle size abutting against the first door panel and hindering its movement, or the fourth tooth with a larger tip circle size abutting against the second door panel and hindering its movement, during the relative folding or opening process of the folding mechanism. This allows the first and second door panels to avoid the first and fourth teeth during the relative folding or opening process of the folding mechanism.

[0045] In one possible implementation, the main shaft includes an outer cover plate, with the first side being the outer side of the outer cover plate. The folding mechanism includes a first locking member, a second locking member, a fixing element, and an elastic element. The second locking member is located between the first locking member and the fixing element. The first synchronous gear and the second synchronous gear are located between the first locking member and the second locking member. The elastic element is located between the second locking member and the fixing element. Both the first locking member and the fixing element are fixed to the outer cover plate. The damping mechanism includes a first locking member, a second locking member, a fixing element, and an elastic element. In this application, both the first locking member and the fixing element are fixed to the outer cover plate. During the rotation of the swing arm, only the second locking member moves, while the first locking member and the fixing element remain stationary, thus ensuring the stability of the damping mechanism in this embodiment.

[0046] In one possible implementation, the surface of the first locking member facing the second locking member is a smooth surface; the end of the second locking member facing the first locking member is provided with a plurality of spaced-apart protrusion groups, each protrusion group including a plurality of protrusions, the plurality of protrusions arranged in a ring and spaced apart, and a first locking groove is formed between adjacent protrusions; the end of the first synchronous gear facing the second locking member is provided with a plurality of first protrusions, and the side of the second synchronous gear facing the second locking member is provided with a plurality of second protrusions; the plurality of first protrusions engage with the first locking groove of one protrusion group, and the plurality of second protrusions engage with the first locking groove of another protrusion group. The smooth surface of the first locking member facing the second locking member can be understood as the absence of any protruding structure on the side of the first locking member facing the second locking member, and the side of the first locking member facing the second locking member may include multiple parts, each of which is smooth. In this embodiment, by setting the surface of the first locking member facing the second locking member to be a smooth surface and providing a plurality of spaced-apart protrusion groups at the end of the second locking member facing the first locking member, rotational resistance is reduced.

[0047] In one possible implementation, the first locking member includes a body and a protrusion. The protrusion is located on the side of the body facing the second locking member. The side of the first rotating end facing the first locking member includes a first abutting portion and a second abutting portion. The second abutting portion protrudes from the first abutting portion and abuts against the body. A portion of the first abutting portion abuts against the protrusion, and a gap exists between the other portion of the first abutting portion and the body. In this embodiment, by setting a gap between the portion of the structure at the end of the first rotating end facing the first locking member and the first locking member, the contact area can be reduced, thus reducing friction. If the contact area between the end of the first rotating end facing the first locking member and the first locking member is too small, there is no tactile feedback when folding or opening. If the contact area is too large, it is difficult to fold or open. This application can adjust the contact area by adjusting the gap between the end of the first rotating end facing the first locking member and the first locking member, thereby controlling the tactile feedback when folding or opening the electronic device.

[0048] In one possible implementation, the folding mechanism includes a first moving member rotatably connected to the first support and the main shaft.

[0049] In one possible implementation, the first moving member is slidably connected to the first bracket. The rotatable connection and slidable connection of the first moving member to the first bracket makes the connection between the first bracket and the first moving member more stable.

[0050] In one possible implementation, the folding mechanism includes a first moving member slidably connected to the first bracket and rotatably connected to the main shaft.

[0051] In one possible implementation, one end of the first moving member is provided with a third arc-shaped groove and a first hole spaced apart, and one end of the first bracket is provided with a first arc-shaped strip and a first shaft. The first arc-shaped strip engages with the third arc-shaped groove and can move within the third arc-shaped groove. The first shaft passes through the first hole and can slide within the first hole. By setting the first shaft to engage with the first hole, the first arc-shaped strip of the first bracket can be prevented from disengaging when moving within the third arc-shaped groove of the first moving member, without affecting the relative folding or opening of the first bracket and the first moving member.

[0052] In one possible implementation, the first door panel includes a first edge and a second edge disposed opposite to each other. When the folding mechanism is in the open state, the second edge is close to the second door panel. The second edge includes a first avoidance structure located on the side of the first door panel away from the flexible display screen. The first avoidance structure helps to prevent the first tooth from colliding with the first door panel and the fourth tooth from colliding with the second door panel.

[0053] In one possible implementation, the first avoidance structure includes a slope facing the side of the first door panel away from the flexible display screen. In other implementations, the first avoidance structure can be an L-shaped recess, and the second avoidance structure can be an L-shaped recess. This application does not limit the specific structure of the first and second avoidance structures. Attached Figure Description

[0054] 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.

[0055] Figure 1 This is a schematic diagram showing the disassembled structure of an electronic device in an unfolded state, as provided in an embodiment of this application. Figure 2 This is an exploded structural diagram of a housing device provided in the embodiments of this application when it is in the unfolded state; Figure 3 This is a schematic diagram of the housing device provided in the embodiments of this application when it is in a folded state; Figure 4A This is an exploded structural diagram of the housing device provided in the embodiments of this application when it is in a folded state; Figure 4B yes Figure 4A Enlarged view of the structure at point A of the housing device shown; Figure 5 This is an exploded structural diagram of a folding mechanism provided in an embodiment of this application; Figure 6 yes Figure 5 The diagram shows the assembled structure of the folding mechanism. Figure 7 yes Figure 6 The structure shown is a cross-sectional view at point AA; Figure 8 This is a partially exploded structural diagram of a spindle provided in an embodiment of this application; Figure 9 yes Figure 8 A schematic diagram of the structure shown from another perspective; Figure 10A This is a structural schematic diagram of a spindle fixing component provided in an embodiment of this application; Figure 10B for Figure 10A A structural schematic diagram of the fastener from another perspective; Figure 11 This is an exploded structural diagram of a damping component, a first synchronizing gear, and a second synchronizing gear provided in an embodiment of this application; Figure 12A This is a schematic diagram of a first synchronous gear and a second synchronous gear structure provided in an embodiment of this application; Figure 12B This is a schematic diagram of a first synchronous gear and a second synchronous gear structure provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of a damping component, a first synchronous gear, and a second synchronous gear assembled according to an embodiment of this application; Figure 14 This is a partial structural diagram of a spindle provided in an embodiment of this application; Figure 15 This is a schematic diagram of the structure of a first support and a second support provided in an embodiment of this application; Figure 16 yes Figure 15 A schematic diagram of the first and second supports from another angle; Figure 17 This is a schematic diagram of the structure of a first moving member and a second moving member provided in an embodiment of this application; Figure 18 yes Figure 17 A structural schematic diagram of the first and second moving parts from another angle; Figure 19 This is a schematic diagram of the structure of a first swing arm and a second swing arm provided in an embodiment of this application; Figure 20 yes Figure 19 A schematic diagram of the structure of the first and second swing arms at another angle; Figure 21 This is a schematic diagram of a first swing arm and a second swing arm assembled to a damping assembly according to an embodiment of this application; Figure 22 This is an exploded structural diagram of a first support, a second support, a first moving member, a second moving member, a first swing arm, and a second swing arm provided in an embodiment of this application; Figure 23 This is a partial structural schematic diagram of a folding mechanism provided in an embodiment of this application; Figure 24 This is a structural schematic diagram of a first door panel and a second door panel provided in an embodiment of this application; Figure 25 yes Figure 7 The diagram shows the structure of the folding mechanism in its folded state. Figure 26 yes Figure 25 The diagram shows the structure of the folding mechanism assembled with the flexible display screen. Figure 27AAn exploded view of a first swing arm, a first synchronizing gear, a second synchronizing gear, and a second swing arm provided for embodiments of this application; Figure 27B A schematic diagram of a combined structure of a first swing arm, a first synchronous gear, a second synchronous gear, and a second swing arm provided for an embodiment of this application; Figure 28 yes Figure 6 The structure shown is a cross-sectional view at BB. Figure 29 yes Figure 28 The diagram shows the structure in another usage state; Figure 30 yes Figure 6 The structure shown is a cross-sectional view at CC. Figure 31 yes Figure 30 The diagram shown is a schematic representation of the structure in its folded state. Figure 32 yes Figure 6 The structure shown is a cross-sectional view at DD. Figure 33 yes Figure 32 The diagram shows the structure in its folded state. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0058] This application provides an electronic device, which can be a foldable electronic product such as a mobile phone, tablet computer, laptop computer, or wearable device. This application uses a mobile phone as an example for illustration.

[0059] like Figure 1 and Figure 2 As shown, Figure 1 This is an exploded structural diagram of an electronic device 100 in its unfolded state. Figure 2 This is an exploded structural diagram of the housing device 20 in its unfolded state. The electronic device 100 includes a flexible display screen 10 and a housing device 20. The housing device 20 is used to support the flexible display screen 10 and can fold or unfold the flexible display screen 10 for use by the user or for storing the electronic device 100.

[0060] The housing device 20 includes a first housing 21, a second housing 22, and a folding mechanism 23. The folding mechanism 23 is located between the first housing 21 and the second housing 22, and is used to enable the first housing 21 and the second housing 22 to be unfolded or folded relative to each other. The first housing 21 is fixedly connected to the folding mechanism 23, and the second housing 22 is fixedly connected to the folding mechanism 23. The first housing 21, the second housing 22, and the folding mechanism 23 together support the flexible display screen 10.

[0061] Understandably, the first housing 21 and the second housing 22 are housing components used to install and fix other parts of the electronic device 100, and have diverse structures. For example, the first housing 21 and the second housing 22 can be used to install batteries, motherboards, camera modules, speakers, etc., to realize the functions of the electronic device 100. The embodiments of this application only briefly illustrate some of the structures of the first housing 21 and the second housing 22, and the accompanying drawings are also simplified. The embodiments of this application do not strictly limit the specific structure of the first housing 21 and the second housing 22.

[0062] The flexible display screen 10 includes a first non-bending portion 11, a second non-bending portion 12, and a bending portion 13, with the bending portion 13 connecting the first non-bending portion 11 and the second non-bending portion 12. The flexible display screen 10 is mounted on a housing device 20. Exemplarily, the first non-bending portion 11 corresponds to the first housing 21, the second non-bending portion 12 corresponds to the second housing 22, and the bending portion 13 corresponds to the folding mechanism 23. The first non-bending portion 11 is fixedly connected to the first housing 21; for example, the first non-bending portion 11 can be bonded to the support surface 211 of the first housing 21 using an adhesive layer. The second non-bending portion 12 is fixedly connected to the second housing 22; for example, the second non-bending portion 12 can be bonded to the support surface 221 of the second housing 22 using an adhesive layer. The bending portion 13 includes a first region adjacent to the first non-bending portion 11, a second region adjacent to the second non-bending portion 12, and a third region located between the first and second regions. The folding mechanism 23 includes a first door panel 238 and a second door panel 239. The first door panel 238 includes a first support surface 2381 for supporting the flexible display screen 10, and the second door panel 239 includes a second support surface 2391 for supporting the flexible display screen 10. The first region of the bending portion 13 can be fixedly connected to a portion of the first support surface 2381 of the first door panel 238, for example, by adhesive bonding. The second region of the bending portion 13 can be fixedly connected to a portion of the second support surface 2391 of the second door panel 239, for example, by adhesive bonding. The third part of the bending portion 13 corresponds to another part of the first support surface 2381 of the first door panel 238 and another part of the second support surface 2391 of the second door panel 239. The third part of the bending portion 13 can move relative to the other part of the first support surface 2381 of the first door panel 238 and the other part of the second support surface 2391 of the second door panel 239. The third part of the bending portion 13 provides dimensional allowance for the deformation of the flexible display screen 10, ensuring that the flexible display screen 10 will not be pulled and damaged during the relative folding or unfolding process of the folding mechanism 23.

[0063] When the folding mechanism 23 is in the open state, the first support surface 2381 of the first door panel 238 and the second support surface 2391 of the second door panel 239 are flush and used to support the flexible display screen 10. When the folding mechanism 23 is in the closed state, the first support surface 2381 of the first door panel 238 and the second support surface 2391 of the second door panel 239 are arranged opposite to each other and are far apart from each other in the direction close to the main axis of the folding mechanism 23.

[0064] Understandably, the adhesive layer between the first non-bending portion 11 and the first housing 21, the adhesive layer between the second non-bending portion 12 and the second housing 22, the adhesive layer between the first region of the bending portion 13 and the first support surface 2381 of the first door panel 238, and the adhesive layer between the second region of the bending portion 13 and the second support surface 2391 of the second door panel 239 can be a continuous full-surface adhesive layer, a point-discontinuous adhesive layer, or an adhesive layer with a hollowed-out area. The specific solution of the adhesive layer is not strictly limited in the embodiments of this application.

[0065] See Figure 1 When the electronic device 100 is in a flattened state, that is, when the housing device 20 is in a flattened state, the flexible display screen 10 unfolds along with the housing device 20 and is also in a flattened state. For example, the folding mechanism 23 can be on the same plane as the first housing 21 and the second housing 22; in other words, the angle between the first housing 21 and the second housing 22 can be approximately 180°. In other embodiments, when the housing device 20 is in a flattened state, the angle between the first housing 21 and the second housing 22 can also be 175°, 183°, or 168°, etc., that is, the angle between the first housing 21 and the second housing 22 can deviate somewhat from 180°.

[0066] For example, when the housing device 20 is in a flattened state, the first housing 21 and the second housing 22 are joined together. The joined first housing 21 and the second housing 22 can abut against each other. The joining of the first housing 21 and the second housing 22 can stop the unfolding action of the housing device 20, preventing it from over-folding during unfolding and damaging the flexible display screen 10 and the folding mechanism 23, thereby improving the reliability of the flexible display screen 10 and the electronic device 100. The joined first housing 21 and the second housing 22 together constitute the outer surface of the electronic device 100, and the outer surface of the folding mechanism 23 is shielded by the first housing 21 and the second housing 22.

[0067] like Figure 3 , Figure 4A and Figure 4B As shown, Figure 3 This is a schematic diagram of the housing device 20 provided in the embodiment of this application when it is in a folded state. Figure 4A This is an exploded structural diagram of the housing device 20 provided in the embodiments of this application when it is in a folded state. Figure 4B yes Figure 4A The enlarged view of the structure at point A of the housing device 20 is shown. When the electronic device 100 is in the folded state, that is, when the housing device 20 is in the folded state, the flexible display screen 10 ( Figure 3 (Not shown) As the housing device 20 folds, it is in a folded state. When the folding mechanism 23 deforms, it can drive the first housing 21 and the second housing 22 to fold into a folded state, and the flexible display screen ( Figure 3 , Figure 4A and Figure 4B (Not shown) Folded along with the housing device 20, the flexible display screen 10 is located inside the housing device 20 and is enclosed by it. In other words, the electronic device 100 can be an inward-folding flexible display screen device. Understandably, when the user folds the electronic device 100 when not in use, the housing device 20 protects the inner flexible display screen 10, preventing scratches, collision damage, etc., to the flexible display screen 10. In other embodiments, the electronic device 100 can also be an outward-folding device.

[0068] For example, during the process of the first housing 21 and the second housing 22 unfolding or folding relative to each other, the bending portion 13 of the flexible display screen 10 deforms, the first housing 21 drives the first non-bending portion 11 to move, and the second housing 22 drives the second non-bending portion 12 to move, and the first non-bending portion 11 and the second non-bending portion 12 fold or unfold relative to each other.

[0069] For example, when the housing device 20 is in the folded state, the first housing 21 and the second housing 22 can be completely closed, with no gap or only a small gap between them, which can provide good waterproof, dustproof, and foreign object protection, thereby improving the reliability of the electronic device 100. After the first housing 21 and the second housing 22 are completely closed, the folding mechanism 23 is exposed. In this way, the first housing 21, the second housing 22, and the folding mechanism 23 together constitute the exterior surface of the electronic device 100.

[0070] The first housing 21 and the second housing 22 can also be unfolded or folded to an intermediate state, so that the folding mechanism 23 and the electronic device 100 are in an intermediate state. The intermediate state can be any state between the flattened state and the folded state, and the flexible display screen 10 moves with the housing device 20.

[0071] See Figure 2 , Figure 3 , Figure 4A and Figure 4B Taking the connection between the first housing 21 and the folding mechanism 23 as an example, the folding mechanism 23 includes a first bracket 232, and the first housing 21 is fixedly connected to the first bracket 232. A fixing groove 212 is provided on the side of the first housing 21 near the folding mechanism 23, and the first bracket 232 is installed in the fixing groove 212. Exemplarily, the first bracket 232 has a first fastening hole 2320, and the first housing 21 has a second fastening hole 213. During installation, the first fastening hole 2320 and the second fastening hole 213 are correspondingly arranged, and a fastening structure (not shown in the figure) passes through the first fastening hole 2320 and the second fastening hole 213 to achieve a fixed connection between the first housing 21 and the folding mechanism 23. The fastening structure can be a screw, bolt, etc.

[0072] The second housing 22 is disposed opposite to the first housing 21, and the second housing 22 is fixedly connected to the folding mechanism 23. For example, the folding mechanism 23 is provided with a second bracket 233. The fixed connection method between the second housing 22 and the second bracket 233 of the folding mechanism 23 is the same as the connection method between the first housing 21 and the folding mechanism 23, and will not be described again here. After the first housing 21 and the folding mechanism 23 are fixedly connected, and the second housing 22 and the folding mechanism 23 are fixedly connected, they together support the flexible display screen 10.

[0073] It is understood that the connection between the first housing 21 and the folding mechanism 23 and the connection between the second housing 22 and the folding mechanism 23 are not limited to fastening structures. They can also be fixed by welding, bonding, fastening, etc., to achieve a fixed connection between the first housing 21 and the folding mechanism 23 and the second housing 22 and the folding mechanism 23. In this way, the first housing 21 and the second housing 22 will open or close during the opening or closing of the folding mechanism 23.

[0074] In this embodiment of the application, during the folding and unfolding process of the housing device 20, the first bracket 232 and the second bracket 233 can move synchronously, that is, move closer to each other or move further away from each other synchronously, so as to improve the mechanical operation experience of the housing device 20 and the electronic device 100.

[0075] In this embodiment, the flexible display screen 10, along with the housing device 20, can be folded and unfolded. When the electronic device 100 is in a flattened state, the flexible display screen 10 is also flattened and can display information for user use. It is understood that the flexible display screen 10 can be a full-screen display, thus giving the electronic device 100 a larger display area to improve the user experience. When the electronic device 100 is in a folded state, the flexible display screen 10 is folded, resulting in a smaller overall planar size of the electronic device 100, making it easier for users to carry and store.

[0076] The flexible display screen 10 can display images. The flexible display screen 10 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MOLED) display screen, a micro light-emitting diode (MLED) display screen, or a quantum dot light-emitting diode (QLED) display screen.

[0077] In some embodiments, the electronic device 100 may further include multiple modules (not shown in the figures), which may be housed inside the housing device 20. The multiple modules of the electronic device 100 may include, but are not limited to, a motherboard, processor, memory, battery, camera module, earpiece module, speaker module, microphone module, antenna module, sensor module, etc. This application embodiment does not specifically limit the number, type, or location of the modules of the electronic device 100.

[0078] like Figure 5 , Figure 6 and Figure 7 As shown, Figure 5 This is an exploded structural diagram of a folding mechanism 23. Figure 6 for Figure 5 The diagram shown is a schematic of the assembled folding mechanism 23. Figure 7 for Figure 6The diagram shows a cross-sectional view of the structure at point AA. The folding mechanism 23 includes a main shaft 231, a first support 232, a second support 233, a first swing arm 234, a second swing arm 235, a first synchronous gear 236, and a second synchronous gear 237. In some embodiments, the folding mechanism 23 further includes a first door panel 238, a second door panel 239, a first moving member 241, and a second moving member 242. The first support 232, second support 233, first swing arm 234, second swing arm 235, first synchronous gear 236, second synchronous gear 237, first moving member 241, and second moving member 242 can collectively form a first rotating assembly. The folding mechanism 23 may also include a second rotating assembly. Both the first and second rotating assemblies are connected to the main shaft 231, the first door panel 238, and the second door panel 239. The first rotating assembly can serve as a rotating assembly at one end of the folding mechanism 23, and the second rotating assembly can serve as a rotating assembly at the other end of the folding mechanism 23.

[0079] The second rotating component and the first rotating component can have the same or similar structure, be symmetrical or partially symmetrical, or have different structures. In some embodiments, the second rotating component and the first rotating component are centrally symmetrical structures. The basic design of the component structure of the second rotating component, the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the component can all refer to the relevant scheme of the first rotating component. At the same time, it is permissible for the second rotating component and the first rotating component to have slight differences in the detailed structure or positional arrangement of the components.

[0080] For example, the second rotating assembly may include a first bracket 232', a second bracket 233', a first swing arm 234', a second swing arm 235', a first synchronous gear 236', a second synchronous gear 237', a first moving component 241', and a second moving component 242'. The structure of each component of the second rotating assembly, the interconnection between the components, and the connection between each component and the main shaft 231, the first door panel 238, and the second door panel 239 can be referred to the relevant description of the first rotating assembly, and will not be repeated in the embodiments of this application.

[0081] In this embodiment, the first support 232 of the first rotating component and the first support 232' of the second rotating component can be independent structural components or two parts of an integral structural component; similarly, the second support 233 of the first rotating component and the second support 233' of the second rotating component can be independent structural components or two parts of an integral structural component. In other embodiments, the folding mechanism 23 may also include the first rotating component and other rotating components, the structure of which may be the same as or different from that of the first rotating component, and this application does not impose strict limitations on this.

[0082] In some embodiments, a first support 232 can be connected to a main shaft 231, and a second support 233 can be connected to a main shaft 231. The first support 232 and the second support 233 are distributed on opposite sides of the main shaft 231. For example, one end of a first swing arm 234 is rotatably connected to the main shaft 231, and the other end of the first swing arm 234 is slidably connected to the first support 232. One end of a first moving member 241 is rotatably connected to the main shaft 231, and the other end of the first moving member 241 is rotatably connected to the first support 232, allowing the first support 232 to rotate relative to the main shaft 231. One end of a second swing arm 235 is rotatably connected to the main shaft 231, and the other end of the second swing arm 235 is slidably connected to the second support 233. One end of a second moving member 242 is rotatably connected to the main shaft 231, and the other end of the second moving member 242 is rotatably connected to the second support 233, allowing the second support 233 to rotate relative to the main shaft 231.

[0083] In other embodiments, the first bracket 232 may also be directly rotatably connected to the main shaft 231. For example, the first bracket 232 may have an arc arm, and the main shaft 231 may have an arc groove. The arc arm on the first bracket 232 engages with the arc groove on the main shaft 231 to achieve a rotatable connection between the first bracket 232 and the main shaft 231. Similarly, the second bracket 233 may also be directly rotatably connected to the main shaft 231. For example, the second bracket 233 may have an arc arm, and the main shaft 231 may have an arc groove. The arc arm on the second bracket 233 engages with the arc groove on the main shaft 231 to achieve a rotatable connection between the second bracket 233 and the main shaft 231.

[0084] Understandably, the first support 232 can be connected to the main shaft 231 via the first swing arm 234 and the first moving component 241, and the second support 233 can be connected to the main shaft 231 via the second swing arm 235 and the second moving component 242. Since the first support 232 is fixedly connected to the first housing 21 and the second support 233 is fixedly connected to the second housing 22 (see...), Figure 1 and Figure 2 Therefore, when the first bracket 232 rotates relative to the main shaft 231 and the second bracket 233 rotates relative to the main shaft 231, the first housing 21 rotates relative to the second housing 22, and the first housing 21 and the second housing 22 can be folded or unfolded relative to each other.

[0085] In some embodiments, both the first synchronizing gear 236 and the second synchronizing gear 237 are rotatably connected to the main shaft 231. One end of the first swing arm 234 is slidably connected to the first bracket 232, and the other end of the first swing arm 234 is rotatably connected to the main shaft 231 and meshes with the first synchronizing gear 236. One end of the second swing arm 235 is slidably connected to the second bracket 233, and the other end of the second swing arm 235 is rotatably connected to the main shaft 231 and meshes with the second synchronizing gear 237. The first synchronizing gear 236 and the second synchronizing gear 237 are used to make the first swing arm 234 and the second swing arm 235 rotate synchronously to improve the mechanical operation experience of the housing device 20 and the electronic device 100.

[0086] In other embodiments, the first swing arm 234 may not mesh with the first synchronous gear 236, and the first swing arm 234 and the first synchronous gear 236 may be sleeved on the same adapter shaft and may be arranged at intervals along the direction of extension of the adapter shaft. The second swing arm 235 may not mesh with the second synchronous gear 237, and the second swing arm 235 and the second synchronous gear 237 may be sleeved on the same adapter shaft and may be arranged at intervals along the direction of extension of the adapter shaft. The first synchronous gear 236 and the second synchronous gear 237 are used to make the first swing arm 234 and the second swing arm 235 rotate synchronously.

[0087] The first synchronizing gear 236 and the second synchronizing gear 237 mesh with each other. The first synchronizing gear 236 includes a first tooth portion 2361 and a second tooth portion 2362. The radius of the tip circle of the first tooth portion 2361 is different from the radius of the tip circle of the second tooth portion 2362. The first tooth portion 2361 meshes with the first rotating end of the first rocker arm 234, and the second tooth portion 2362 meshes with the second synchronizing gear 237.

[0088] The second synchronizing gear 237 includes a third tooth section 2371 and a fourth tooth section 2372. The radius of the addendum circle of the third tooth section 2371 is different from that of the fourth tooth section 2372. The third tooth section 2371 meshes with the second tooth section 2362, and the fourth tooth section 2372 meshes with the second rotating end of the second rocker arm 235. The addendum circle refers to the circle containing the tip of the tooth. The radius of the addendum circle is the distance from the tip of the tooth to the center of rotation.

[0089] In this embodiment, the first synchronizing gear 236 includes two teeth, namely a first tooth 2361 and a second tooth 2362, and the second synchronizing gear 237 includes two teeth, namely a third tooth 2371 and a fourth tooth 2372. The addendum circles of the two teeth of the first synchronizing gear 236 and the two teeth of the second synchronizing gear 237 can be different. This allows for adjustments to the dimensions of different parts of the synchronizing gears, the rotation center of the first synchronizing gear 236, and the rotation center of the second synchronizing gear 237 according to the space and structural requirements of the folding mechanism 23. This makes the first synchronizing gear 236 and the second synchronizing gear 237 occupy space in the folding mechanism 23 more flexibly, which is beneficial for making full use of the internal space of the folding mechanism 23. Understandably, with the miniaturization of the electronic device 100 and the folding mechanism 23, the internal space of the folding mechanism 23 is limited. This application achieves a reasonable configuration of the rotation centers of the first rotating end 2341, the first synchronous gear 236, the second synchronous gear 237, and the second rotating end 2351 within a limited space by setting the addendum circles of the two teeth of the first synchronous gear 236 and the two teeth of the second synchronous gear 237 to maximize space utilization. For example, in some embodiments, if the screen space is limited in the folded state, the addendum circles of the second tooth 2362 and the third tooth 2371 can be set to be smaller to avoid the second tooth 2362 and the third tooth 2371 from abutting the flexible display screen in the folded state; if the door panel is to be moved by the folding mechanism 23, the addendum circles of the first tooth 2361 and the fourth tooth 2372 can be set to be smaller.

[0090] like Figure 8 and Figure 9 As shown, Figure 8 This is a partial exploded view of the main axis 231. Figure 9 for Figure 8 The diagram shows a structural schematic from another perspective. The main shaft 231 includes an outer cover plate 2311 and a fastener 2312. The outer cover plate 2311 is bent to form an inner space 2313 of the main shaft 231, which is located inside the outer cover plate 2311. The fastener 2312 can be accommodated in the inner space 2313. There can be two fasteners, namely fastener 2312 and fastener 2312'. Fastener 2312 and fastener 2312' respectively cooperate with the first rotating assembly and the second rotating assembly. Fastener 2312 and fastener 2312' can be independent structural components or two parts of an integral structural component. The number and structural form of the fasteners are not limited in the embodiments of this application. The structures of fastener 2312 and fastener 2312' can be the same or similar, symmetrical or partially symmetrical, or different.

[0091] The fastener 2312 is fixed to the outer cover plate 2311. For example, the fastener 2312 is provided with a first fixing hole 2312-1, and the outer cover plate 2311 is provided with a protrusion located in the inner space 2313. The protrusion is provided with a second fixing hole 2311-1. The fastener 2317 passes through the corresponding first fixing hole 2312-1 and second fixing hole 2311-1 to realize the fixed connection between the fastener 2312 and the outer cover plate 2311. The fastener 2317 can be a screw or bolt, etc. This application does not limit the number of fasteners and can set them as needed.

[0092] In some embodiments, the outer cover plate 2311 may be provided with a positioning post 2311-2, and the fixing member 2312 may be provided with a positioning hole 2312-2. When assembling the outer cover plate 2311 and the fixing member 2312, the positioning post 2311-2 may be inserted into the positioning hole 2312-2 first to achieve the initial pre-assembly of the outer cover plate 2311 and the fixing member 2312, and then the fastener 2317 may be used to achieve the fixed connection of the outer cover plate 2311 and the fixing member 2312.

[0093] In this embodiment, the number and position of the first fixing hole 2312-1, the second fixing hole 2311-1, the positioning hole 2312-2, and the positioning post 2311-2 are not limited, and can be arranged according to the structure and space of the outer cover plate 2311 and the fastener 2312. Figure 8 and Figure 9 The structure shown is merely schematic.

[0094] It is understood that the connection method between the fastener 2312 and the outer cover plate 2311 is not limited to fastener fixing. It can also be fixed and installed by welding, bonding, snap-fit ​​connection, etc., to achieve a fixed connection between the fastener 2312 and the outer cover plate 2311. In other embodiments, the fastener 2312 and the outer cover plate 2311 can also be an integral structure.

[0095] In some embodiments, see Figure 9 The outer cover plate 2311 of the spindle 231 includes an outer surface 2314 disposed opposite to the inner space 2313, and the outer surface 2314 is the outer surface of the outer cover plate 2311. Exemplarily, the outer surface 2314 of the outer cover plate 2311 may include a first arcuate portion 2314a, a flat portion 2314b, and a second arcuate portion 2314c, with the first arcuate portion 2314a and the second arcuate portion 2314c respectively connected to both sides of the flat portion 2314b. In some other embodiments, the outer surface 2314 may also be an arcuate surface or other smooth curved surface.

[0096] The fact that the outer cover 2311's outer surface 2314 is shaped like an arc or curved surface helps improve the appearance and grip experience of the electronic device 100 when it is in the closed state. In addition, the middle part of the outer surface 2314 can be a flat portion 2314b, which makes the thickness of the outer cover 2311 (the dimension in the direction perpendicular to the flat portion 2314b) smaller, the overall thickness of the housing device 20 when it is in the open state is smaller, and the overall width when it is in the closed state is smaller, which is beneficial to the miniaturization and thinning of the electronic device 100.

[0097] Exemplarily, the spindle 231 also includes a first side 2315 and a second side 2316 disposed opposite to each other. The first side is the outer side of the spindle 231, and the second side 2316 is closer to the flexible display screen 10 relative to the first side 2315. The second side 2316 is used to support the flexible display screen 10. Understandably, the first side 2315 is the outer side of the outer cover plate 2311.

[0098] See again Figure 1 , Figure 2 and Figure 9 When the first housing 21 and the second housing 22 are unfolded to a flattened state, the first housing 21 and the second housing 22 cover the outer cover plate 2311's exterior surface 2314. In other words, when the housing device 20 is in a flattened state, the first housing 21 and the second housing 22 can cover the outer cover plate 2311 from the back side of the housing device 20 (i.e., the side facing away from the flexible display screen 10). At this time, the first housing 21 and the second housing 22 can also cover other components of the folding mechanism 23 from the back side of the housing device 20, enabling the housing device 20 to achieve back-side self-shading, thereby protecting the folding mechanism 23 and ensuring the integrity of the appearance of the housing device 20 and the electronic device 100, resulting in a better aesthetic experience and better waterproof and dustproof performance. In other words, the exterior surface seen from the back side of the electronic device 100 is the exterior surface of the first housing 21 and the second housing 22.

[0099] See also Figure 3 , Figure 4A and Figure 9 When the first housing 21 and the second housing 22 are folded relative to each other to the folded state, the outer surface 2314 of the outer cover 2311 is exposed relative to the first housing 21 and the second housing 22. At this time, the first housing 21, the second housing 22, and the outer cover 2311 together form the exterior components of the electronic device 100. Therefore, the electronic device 100 can achieve back-side self-shading in the folded state, which is beneficial to improving the appearance integrity and has good waterproof and dustproof performance.

[0100] like Figure 10A and Figure 10B As shown, Figure 10A A schematic diagram of the fixing member 2312 of the main spindle 231. Figure 10Bfor Figure 10A The diagram shows a structural schematic of the fastener 2312 from another perspective. The fastener 2312 includes a main body 2312-3 and a first protrusion 2312-4, a second protrusion 2312-5, a third protrusion 2312-6, and a fourth protrusion 2312-7 located on the main body 2312-3. The main body 2312-3 includes a surface 2312a, which is the surface of the main body 2312-3 facing away from the outer cover plate 2311. The surface 2312a of the main body 2312-3 includes a first facet 2312a-1 and a second facet 2312a-2. The first facet 2312a-1 and the second facet 2312a-2 can be bent, and both the first facet 2312a-1 and the second facet 2312a-2 can be arc-shaped surfaces.

[0101] The first protrusion 2312-4 and the second protrusion 2312-5 can be disposed opposite to each other on the two inner sidewalls of the main body 2312-3. A first gap 2312b is formed between the first protrusion 2312-4 and the first parting surface 2312a-1, and a second gap 2312c is formed between the second protrusion 2312-5 and the first parting surface 2312a-1. The first protrusion 2312-4 and the second protrusion 2312-5, together with the first parting surface 2312a-1, form a first mounting space 2312-8. It can be understood that the first mounting space 2312-8 may include the first gap 2312b, the second gap 2312c, and the space between the first gap 2312b and the second gap 2312c.

[0102] The third protrusion 2312-6 and the fourth protrusion 2312-7 are disposed opposite to each other on the two inner sidewalls of the main body 2312-3. A third gap 2312d is formed between the third protrusion 2312-6 and the second parting surface 2312a-2, and a fourth gap 2312e is formed between the fourth protrusion 2312-7 and the second parting surface 2312a-2. The third protrusion 2312-6, the fourth protrusion 2312-7, and the second parting surface 2312a-2 together enclose a second mounting space 2312-9. It can be understood that the second mounting space 2312-9 may include the third gap 2312d, the fourth gap 2312e, and the space between the third gap 2312d and the fourth gap 2312e. In some embodiments, the fastener 2312 includes a fastening part 2312f, which protrudes from the outer sidewall of the main body 2312-3 and has a through hole 2312g. In some embodiments, the first protrusion 2312-4, the second protrusion 2312-5, the third protrusion 2312-6, and the fourth protrusion 2312-7 can be arc-shaped structures, and the first gap 2312b, the second gap 2312c, the third gap 2312d, and the fourth gap 2312e formed can also be arc-shaped spaces.

[0103] like Figure 11 , Figure 12A and Figure 13 As shown, Figure 11 This is an exploded structural diagram of the damping assembly 243, the first synchronizing gear 236, and the second synchronizing gear 237. Figure 12A This is a schematic diagram of the structure of the first synchronizing gear 236 and the second synchronizing gear 237. Figure 13 This is a schematic diagram of the assembled structure of the damping assembly 243, the first synchronous gear 236, and the second synchronous gear 237. The main shaft 231 includes the damping assembly 243, which is mounted on the outer cover plate 2311 of the main shaft 231. The damping assembly 243 includes a first locking member 2431, a second locking member 2432, a first adapter shaft 2433, a second adapter shaft 2434, multiple third adapter shafts 2435, multiple elastic members 2436, and a fixing element 2437. The second locking member 2432 is located between the first locking member 2431 and the fixing element 2437. The first synchronous gear 236 and the second synchronous gear 237 are located between the first locking member 2431 and the second locking member 2432. The elastic member 2436 is located between the second locking member 2432 and the fixing element 2437. Both the first locking member 2431 and the fixing element 2437 are fixed to the outer cover plate 2311.

[0104] Exemplarily, the first locking member 2431 may include a first mounting hole 2431-1 and a plurality of first through holes 2431-2. The first mounting hole 2431-1 is used for fixed connection with the outer cover plate 2311. The plurality of first through holes 2431-2 are spaced apart from each other. The plurality of first through holes 2431-1 may be arranged in a straight line, an arc, a wavy line, or other similar pattern. In this embodiment, four first through holes 2431-2 are used as an example. The first mounting hole 2431-1 and the first through holes 2431-2 extend in different directions. The surface of the first locking member 2431 facing the second locking member 2432 is a smooth surface. This can be understood as the surface of the first locking member 2431 facing the second locking member 2432 having no protruding structural features. The surface of the first locking member 2431 facing the second locking member 2432 may include multiple parts, each of which is smooth, which helps to reduce rotational resistance.

[0105] The first locking member 2431 also includes a body 2431-3 and a protrusion 2431-4, with the protrusion 2431-4 located on the side of the body 2431-3 facing the second locking member 2432. The surface of the body 2431-3 facing the second locking member 2432 is a smooth surface, and the surface of the protrusion 2431-4 facing the second locking member 2432 is also a smooth surface.

[0106] Exemplarily, the second locking member 2432 includes a locking plate 2432-1 and a plurality of protrusion groups 2432-2, which are fixed to the same side surface of the locking plate 2432-1 and face the first locking member 2431. The locking plate 2432-1 includes a plurality of second through holes 2432-3, which are spaced apart from each other. The plurality of second through holes 2432-3 can be arranged in a straight line, an arc, a wavy line, or other similar pattern. The plurality of protrusion groups 2432-2 are arranged one-to-one with the plurality of second through holes 2432-3. The number of second through holes 2432-3 and the number of protrusion groups 2432-2 can be four, but this application does not limit the number of second through holes 2432-3 and the number of protrusion groups 2432-2. Each bump group 2432-2 may include multiple bumps 2432-4, which are arranged in a ring and spaced apart from each other. The multiple bumps 2432-4 are arranged around the second through hole 2432-3, and a first locking groove 2432-5 is formed between two adjacent bumps 2432-4. The second locking member 2432 can be a one-piece molded structural component to have high structural strength.

[0107] Exemplarily, the fixing element 2437 is located on the side of the elastic element 2436 facing away from the second locking element 2432. The fixing element 2437 includes a second mounting hole 2437-1 and a plurality of third through holes 2437-2. The second mounting hole 2437-1 is used for fixed connection with the spindle 231. The plurality of third through holes 2437-2 are spaced apart from each other, and the extension directions of the second mounting hole 2437-1 and the third through holes 2437-2 are different. Exemplarily, the number, arrangement shape, and arrangement spacing of the plurality of first through holes 2431-2, the plurality of second through holes 2432-3, and the plurality of third through holes 2437-2 can be the same. The number of third through holes 2437-2 can be four, and the plurality of third through holes 2437-2 can be arranged in a straight line, an arc, a wavy line, or other similar patterns.

[0108] Exemplarily, the elastic element 2436 is located on the side of the second locking element 2432 facing away from the first locking element 2431. The elastic element 2436 may include a plurality of springs 2436-1. The number of springs 2436-1 is the same as the number of first through holes 2431-2. Specifically, the number of springs 2436-1 can be four. In some other embodiments, the elastic element 2436 may also be made of elastic materials such as elastic rubber; this application does not strictly limit this.

[0109] For example, the top end of the first adapter shaft 2433 is provided with a limiting flange 2433-1, the outer diameter of which is larger than the outer diameter of the main body of the first adapter shaft 2433. The bottom end of the first adapter shaft 2433 is provided with a limiting groove 2433-2, which is recessed relative to the outer surface of the main body of the first adapter shaft 2433, and the diameter of the bottom wall of the limiting groove 2433-2 is smaller than the outer diameter of the main body of the first adapter shaft 2433.

[0110] The first adapter shaft 2433 is inserted into the first locking member 2431, the second locking member 2432, one of the springs 2436-1, and the fixing element 2437. The first adapter shaft 2433 passes through one of the first through holes 2431-2 of the first locking member 2431, one of the second through holes 2432-3 of the second locking member 2432, the inner space of one of the springs 2436-1, and one of the third through holes 2437-2 of the fixing element 2437. Furthermore, the limiting flange 2433-1 of the first adapter shaft 2433 is located on the side of the first locking member 2431 facing away from the second locking member 2432 and abuts against the first locking member 2431. The fixing element 2437 is engaged in the limiting slot 2433-2 of the first adapter shaft 2433, so that the first locking member 2431, the second locking member 2432, one of the springs 2436-1, and the fixing element 2437 can maintain a relatively fixed positional relationship, with the spring 2436-1 in a compressed state. The bottom end of the first adapter shaft 2433 can also be fixedly connected to the fixing element 2437 by welding or bonding. For example, the top end of the second adapter shaft 2434 is provided with a limiting flange 2434-1, the outer diameter of which is larger than the outer diameter of the main body of the second adapter shaft 2434. The bottom end of the second adapter shaft 2434 is provided with a limiting groove 2434-2, which is recessed inward relative to the outer surface of the main body of the second adapter shaft 2434. The diameter of the bottom wall of the limiting groove 2434-2 is smaller than the outer diameter of the main body of the second adapter shaft 2434. The structure of the second adapter shaft 2434 can be the same as that of the first adapter shaft 2433 to use the same material, reducing the types of materials and lowering costs. In other embodiments, the structure of the second adapter shaft 2434 may differ from that of the first adapter shaft 2433; this application does not impose strict limitations on this.

[0111] The second adapter shaft 2434 is inserted into the first locking member 2431, the second locking member 2432, one of the springs 2436-1, and the fixing element 2437. The second adapter shaft 2434 passes through one of the first through holes 2431-2 of the first locking member 2431, one of the second through holes 2432-3 of the second locking member 2432, the inner space of one of the springs 2436-1, and one of the third through holes 2437-2 of the fixing element 2437. Furthermore, the limiting flange 2434-1 of the second adapter shaft 2434 is located on the side of the first locking member 2431 facing away from the second locking member 2432 and abuts against the first locking member 2431. The fixing element 2437 is engaged in the limiting groove 2434-2 of the second adapter shaft 2434, so that the first locking member 2431, the second locking member 2432, one of the springs 2436-1, and the fixing element 2437 can maintain a relatively fixed positional relationship, with the spring 2436-1 in a compressed state. The bottom end of the second adapter shaft 2434 can also be fixedly connected to the fixing element 2437 by welding or bonding. For example, the top end of the third adapter shaft 2435 is provided with a limiting flange 2435-1, the outer diameter of which is larger than the outer diameter of the main body of the third adapter shaft 2435. The bottom end of the third adapter shaft 2435 is provided with a limiting groove 2435-2, which is recessed inward relative to the outer surface of the main body of the third adapter shaft 2435. The diameter of the bottom wall of the limiting groove 2435-2 is smaller than the outer diameter of the main body of the third adapter shaft 2435. The structure of the third adapter shaft 2435 can be the same as that of the first adapter shaft 2433 to use the same material, reducing the types of materials and lowering costs. In other embodiments, the structure of the third adapter shaft 2435 may differ from that of the first adapter shaft 2433; this application does not impose strict limitations on this.

[0112] The number of third adapter shafts 2435 is the same as the number of synchronous gears (including the first synchronous gear 236 and the second synchronous gear 237, and possibly more synchronous gears). The third adapter shafts 2435, synchronous gears, and a portion of the springs 2436-1 in the elastic element 2436 are arranged in a one-to-one correspondence. The third adapter shaft 2435 is inserted into the first locking member 2431, one of the synchronous gears, the second locking member 2432, one of the springs 2436-1, and the fixing element 2437. Specifically, the third adapter shaft 2435 passes through one of the first through holes 2431-2 of the first locking member 2431, one of the second through holes 2432-3 of the second locking member 2432, the shaft hole of the first synchronous gear 236 (or the shaft hole of the second synchronous gear 237, or the shaft hole of other synchronous gears; one third adapter shaft 2435 corresponds to one synchronous gear), the inner space of one of the springs 2436-1, and one of the third through holes 2437-2 of the fixing element 2437. Furthermore, the limiting flange 2435-1 of the third adapter shaft 2435 is located on the side of the first locking member 2431 facing away from the second locking member 2432 and abuts against the first locking member 2431. The fixing element 2437 is engaged in the limiting groove 2435-2 of the third adapter shaft 2435, so that the first locking member 2431, the second locking member 2432, the synchronous gear, one of the springs 2436-1, and the fixing element 2437 can maintain a relatively fixed positional relationship, with the spring 2436-1 in a compressed state. The bottom end of the third adapter shaft 2435 can also be fixedly connected to the fixing element 2437 by welding or bonding.

[0113] For example, see Figure 11 and Figure 12A The first synchronous gear 236 and the second synchronous gear 237 are located between the first locking member 2431 and the second locking member 2432. The first synchronous gear 236 and the second synchronous gear 237 mesh with each other. The radius R1 of the tip circle of the first tooth portion 2361 of the first synchronous gear 236 is different from the radius R2 of the tip circle of the second tooth portion 2362. The second tooth portion 2362 meshes with the second synchronous gear 237. In some embodiments, the radius R1 of the tip circle of the first tooth portion 2361 can be larger than the radius R2 of the tip circle of the second tooth portion 2362. Taking the radius R1 of the tip circle of the first tooth portion 2361 of the first synchronous gear 236 as an example, the radius R1 of the tip circle of the first tooth portion 2361 is the distance from the tip of the tooth of the first tooth portion 2361 to the rotation center of the first tooth portion 2361.

[0114] The radius R3 of the tip circle of the third tooth portion 2371 of the second synchronizing gear 237 is different from the radius R4 of the tip circle of the fourth tooth portion 2372, and the third tooth portion 2371 meshes with the second tooth portion 2362. In some embodiments, the radius R4 of the tip circle of the fourth tooth portion 2372 may be greater than the radius R3 of the tip circle of the third tooth portion 2371.

[0115] In other embodiments, the radius R1 of the tip circle of the first tooth 2361 may be smaller than the radius R2 of the tip circle of the second tooth 2362, and the radius R4 of the tip circle of the fourth tooth 2372 may be smaller than the radius R3 of the tip circle of the third tooth 2371.

[0116] like Figure 12B As shown, Figure 12B This is a schematic diagram of the structure of the first synchronizing gear 236 and the second synchronizing gear 237. Figure 12A and Figure 12B The structures are identical, but for ease of identification. The pitch circle radius R11 of the first tooth portion 2361 of the first synchronous gear 236 is different from the pitch circle radius R12 of the second tooth portion 2362. Similarly, the pitch circle radius R13 of the third tooth portion 2371 of the second synchronous gear 237 is different from the pitch circle radius R14 of the fourth tooth portion 2372. The pitch circle is the product of the module and the number of teeth. The module is a fundamental parameter for calculating the geometric dimensions of a gear. The size of the module reflects the thickness, thinness, size, and load-bearing capacity of the gear. When the size of the addendum circle changes, the size of the pitch circle changes accordingly.

[0117] The first synchronizing gear 236 also includes a first rotating shaft hole 2363 and a plurality of first protrusions 2364. The plurality of first protrusions 2364 are located at one end of the first synchronizing gear 236 and are arranged around the first rotating shaft hole 2363. The plurality of first protrusions 2364 are arranged in a ring and spaced apart from each other and are positioned toward the second locking member 2432.

[0118] The second synchronizing gear 237 includes a second shaft hole 2373 and a plurality of second protrusions 2374. The plurality of second protrusions 2374 are located at one end of the second synchronizing gear 237 and are arranged around the second shaft hole 2373. The plurality of second protrusions 2374 are arranged in a ring and spaced apart from each other and face the second locking member 2432.

[0119] A third adapter shaft 2435 is inserted into the first shaft hole 2363 of the first synchronous gear 236 to achieve a rotatable connection between the first synchronous gear 236 and the main shaft 231. Another third adapter shaft 2435 is inserted into the second shaft hole 2373 of the second synchronous gear 237 to achieve a rotatable connection between the second synchronous gear 237 and the main shaft 231.

[0120] In some usage configurations, a first protrusion 2364 of the first synchronizing gear 236 is staggered with multiple protrusions 2432-4 of the second locking member 2432 to form a locking structure, with the multiple first protrusions 2364 correspondingly locking into multiple first locking grooves 2432-5. The shape and position of the multiple first protrusions 2364 of the first synchronizing gear 236 are adapted to the shape and position of the corresponding multiple first locking grooves 2432-5. Similarly, a second protrusion 2374 of the second synchronizing gear 237 is staggered with multiple protrusions 2432-4 of the second locking member 2432 to form a locking structure, with the multiple second protrusions 2374 correspondingly locking into multiple first locking grooves 2432-5. The shape and position of the multiple second protrusions 2374 of the second synchronizing gear 237 are adapted to the shape and position of the corresponding multiple first locking grooves 2432-5.

[0121] The first synchronizing gear 236 can be a one-piece molded structural component to achieve high structural strength. The second synchronizing gear 237 can also be a one-piece molded structural component to achieve high structural strength. The first synchronizing gear 236 and the second synchronizing gear 237 can have identical structures to utilize the same material, reducing material types and lowering costs. In other embodiments, the structures of the first synchronizing gear 236 and the second synchronizing gear 237 can also differ; this application does not impose strict limitations on this.

[0122] It is understood that the damping component 243 of this application can have multiple implementation structures. The above is only one implementation of the structure of the damping component 243. This application does not limit the specific structure of the damping component 243.

[0123] like Figure 10A , Figure 10B , Figure 13 and Figure 14 As shown, Figure 14 This is a partial structural diagram of spindle 231. Figure 14 The assembly includes a fastener 2312, a damping component 243, and a portion of an outer cover plate 2311. The fastener 2312 of the spindle 231 is mounted on the outer cover plate 2311, and the damping component 243 is also mounted on the outer cover plate 2311. The fastener 2312 and the outer cover plate 2311 are fixedly connected by fasteners 2317, as detailed in the foregoing description, which will not be repeated here.

[0124] The damping assembly 243 is installed on the outer cover plate 2311. The first mounting hole 2431-1 of the first locking member 2431 of the damping assembly 243 corresponds to the through hole 2312g of the fixing member 2312. Fasteners pass through the first mounting hole 2431-1 and the through hole 2312g of the fixing member 2312 to achieve a fixed connection between the damping assembly 243 and the fixing member 2312. Furthermore, multiple fasteners can be used, and the fasteners pass through the second mounting hole 2437-1 of the fixing element 2437 to achieve a fixed connection between the damping assembly 243 and the outer cover plate 2311 of the spindle 231. The connection method between the damping assembly 243 and the outer cover plate 2311 is not limited to fastener connection; bolts or clips can also be used. The damping assembly 243 can also be directly fixedly connected to the outer cover plate 2311 without being fixedly connected to the fixing member 2312.

[0125] The first locking member 2431 and the fixing element 2437 of this application are both fixed to the outer cover plate 2311. During the rotation of the first swing arm 234 and the second swing arm 235, only the second locking member 2432 moves, while the first locking member 2431 and the fixing element 2437 remain stationary, thus stabilizing the damping mechanism in the embodiment of this application.

[0126] like Figure 15 and Figure 16 As shown, Figure 15 This is a structural diagram of the first support 232 and the second support 233. Figure 16 yes Figure 15The diagram shows a first bracket 232 and a second bracket 233 from another angle. The first bracket 232 includes a first main body 2321 and a first mounting portion 2322, a second mounting portion 2323, and a third mounting portion 2324 located on the first main body 2321. The first mounting portion 2322 and the second mounting portion 2323 are located at opposite ends of the first main body 2321, and the third mounting portion 2324 is located between the first mounting portion 2322 and the second mounting portion 2323. The first mounting portion 2322 protrudes from the first main body 2321 and includes a first mating portion 2322-1 and a first arc-shaped strip 2322-2. The first arc-shaped strip 2322-2 is located on the side of the first mating portion 2322-1 facing the third mounting portion 2324. The first arc-shaped strip 2322-2 is an arc-shaped strip structure. The second mounting part 2323 includes a first arc-shaped groove 2323-1, which includes an opening and a bottom wall disposed opposite to each other. The opening and bottom wall of the first arc-shaped groove 2323-1 extend along the direction in which the first mounting part 2322, the second mounting part 2323, and the third mounting part 2324 are arranged. The third mounting part 2324 includes a first sliding groove 2324-1, which includes a first main groove 2324-2 and a first side groove 2324-3 and a second side groove 2324-4 located at both ends of the first main groove 2324-2. The first main groove 2324-2, the first side groove 2324-3, and the second side groove 2324-4 are interconnected.

[0127] The second bracket 233 includes a second main body 2331 and a fourth mounting portion 2332, a fifth mounting portion 2333, and a sixth mounting portion 2334 located on the second main body 2331. The fourth mounting portion 2332 and the fifth mounting portion 2333 are located at opposite ends of the second main body 2331, and the sixth mounting portion 2334 is located between the fourth mounting portion 2332 and the fifth mounting portion 2333. The fourth mounting portion 2332 protrudes from the second main body 2331 and includes a second mating portion 2332-1 and a second arc-shaped strip 2332-2. The second arc-shaped strip 2332-2 is located on the side of the second mating portion 2332-1 facing the sixth mounting portion 2334. The second arc-shaped strip 2332-2 is an arc-shaped strip structure. The fifth mounting part 2333 includes a second arc-shaped groove 2333-1, which includes an opening and a bottom wall disposed opposite to each other. The opening and bottom wall of the second arc-shaped groove 2333-1 extend along the direction in which the fourth mounting part 2332, the fifth mounting part 2333, and the sixth mounting part 2334 are arranged. The sixth mounting part 2334 includes a second sliding groove 2334-1, which includes a second main groove 2334-2 and a third side groove 2334-3 and a fourth side groove 2334-4 located at both ends of the second main groove 2334-2. The second main groove 2334-2, the third side groove 2334-3, and the fourth side groove 2334-4 are interconnected.

[0128] like Figure 17 and Figure 18 As shown, Figure 17 This is a structural schematic diagram of the first moving part 241 and the second moving part 242. Figure 18 yes Figure 17 The diagram shows the structure of the first moving component 241 and the second moving component 242 from another angle. The first moving component 241 includes a first connecting portion 2411, a first connecting arm 2412, and a first arc-shaped arm 2413. The first connecting arm 2412 is fixedly connected between the first connecting portion 2411 and the first arc-shaped arm 2413. The first connecting portion 2411 includes a first end 2411-1 and a second end 2411-2 disposed opposite to each other. The first end 2411-1 is provided with a third arc-shaped groove 2411-3, and the second end 2411-2 is provided with a third arc-shaped strip 2411-4. The second end 2411-2 also includes a first assembly hole 2411-5. The first arc-shaped arm 2413 includes a first main arc-shaped arm 2413-1 and a fourth arc-shaped strip 2413-2 and a fifth arc-shaped strip 2413-3 located on opposite sides of the first main arc-shaped arm 2413-1. The first main arc arm 2413-1 also includes a first groove 2413-4, a second assembly hole 2413-5, and a first limiting post 2413-6. The first groove 2413-4 is disposed opposite to the first connecting part 2411.

[0129] The second moving component 242 includes a second connecting portion 2421, a second connecting arm 2422, and a second arc-shaped arm 2423. The second connecting arm 2422 is fixedly connected between the second connecting portion 2421 and the second arc-shaped arm 2423. The second connecting portion 2421 includes a third end 2421-1 and a fourth end 2421-2 disposed opposite to each other. The third end 2421-1 is provided with a fourth arc-shaped groove 2421-3, and the fourth end 2421-2 is provided with a sixth arc-shaped strip 2421-4. The fourth end 2421-2 also includes a third assembly hole 2421-5. The second arc-shaped arm 2423 includes a second main arc-shaped arm 2423-1 and a seventh arc-shaped strip 2423-2 and an eighth arc-shaped strip 2423-3 located on opposite sides of the second main arc-shaped arm 2423-1. The second main arc-shaped arm 2423-1 also includes a second groove 2423-4, a fourth assembly hole 2423-5, and a second limiting post 2423-6. The second groove 2423-4 is positioned opposite to the first connecting part 2411.

[0130] like Figure 19 and Figure 20 As shown, Figure 19 This is a structural schematic diagram of the first swing arm 234 and the second swing arm 235. Figure 20 yes Figure 19The diagram shows the structure of the first swing arm 234 and the second swing arm 235 from another angle. The first swing arm 234 includes a first rotating end 2341 and a first sliding end 2342. The first rotating end 2341 includes a third pivot hole 2343, a fifth tooth 2344, and a plurality of third protrusions 2345. The fifth tooth 2344 surrounds the third pivot hole 2343, and the plurality of third protrusions 2345 surround the third pivot hole 2343 and are located on one side of the fifth tooth 2344. One side of the first rotating end 2341 includes a first abutting portion 2341-1 and a second abutting portion 2341-2, with the second abutting portion 2341-2 protruding from the first abutting portion 2341-1. The first sliding end 2342 includes a first main sliding portion 2346 and a first side portion 2347 and a second side portion 2348 located on opposite sides of the first main sliding portion 2346. The first main sliding portion 2346 is fixedly connected to the first rotating end 2341. The first swing arm 234 can be a one-piece molded structural component to have high structural strength.

[0131] The second swing arm 235 includes a second rotating end 2351 and a second sliding end 2352. The second rotating end 2351 includes a fourth pivot hole 2353, a sixth tooth 2354, and a plurality of fourth protrusions 2355. The sixth tooth 2354 surrounds the fourth pivot hole 2353, and the plurality of fourth protrusions 2355 surround the fourth pivot hole 2353 and are located on one side of the sixth tooth 2354. One side of the second rotating end 2351 includes a third abutment portion 2351-1 and a fourth abutment portion 2351-2, with the fourth abutment portion 2351-2 protruding from the third abutment portion 2351-1. The second sliding end 2352 includes a second main sliding portion 2356 and a third side portion 2357 and a fourth side portion 2358 located on opposite sides of the second main sliding portion 2356. The second main sliding portion 2356 is fixedly connected to the second rotating end 2351. The second swing arm 2355 can be a one-piece molded structural component to achieve high structural strength.

[0132] The first swing arm 234 and the second swing arm 235 can have the same structure to use the same material, reducing the types of materials and lowering costs. In other embodiments, the structures of the first swing arm 234 and the second swing arm 235 can also be different, and this application does not impose strict limitations on this.

[0133] like Figure 13 , Figure 19 and Figure 21 As shown, Figure 21This is a schematic diagram of the first swing arm 234 and the second swing arm 235 assembled into the damping assembly 243. The first adapter shaft 2433 of the damping assembly 243 passes through the third shaft hole 2343 of the first rotating end 2341 of the first swing arm 234, and the first rotating end 2341 of the first swing arm 234 is rotatably connected to the main shaft 231. The second adapter shaft 2434 of the damping assembly 243 passes through the fourth shaft hole 2353 of the second rotating end 2351 of the second swing arm 235, and the second rotating end 2351 of the second swing arm 235 is rotatably connected to the main shaft 231.

[0134] In some embodiments, the third pivot hole 2343 of the first swing arm 234, the first pivot hole 2363 of the first synchronous gear 236, the second pivot hole 2373 of the second synchronous gear 237, and the fourth pivot hole 2353 of the second swing arm 235 are arranged in an arc shape, which can make full use of the space of the main shaft 231, so that the main shaft 231 can release more internal space to accommodate the flexible display screen, thereby improving the compactness of the structural components of the electronic device 100, reducing the volume of the electronic device 100, and facilitating the miniaturization and thinning of the electronic device 100.

[0135] See also Figure 11 and Figure 21 In some usage configurations, a third protrusion 2345 of the first swing arm 234 is staggered with multiple protrusions 2432-4 of the second locking member 2432 to form a locking structure, with the multiple third protrusions 2345 correspondingly locking into multiple first locking grooves 2432-5. The shape and position of the multiple third protrusions 2345 of the first swing arm 234 are adapted to the shape and position of the corresponding multiple first locking grooves 2432-5. Similarly, a fourth protrusion 2355 of the second swing arm 235 is staggered with multiple protrusions 2432-4 of the second locking member 2432 to form a locking structure, with the multiple fourth protrusions 2355 correspondingly locking into multiple first locking grooves 2432-5. The shape and position of the multiple fourth protrusions 2355 of the second swing arm 235 are adapted to the shape and position of the corresponding multiple first locking grooves 2432-5.

[0136] In this embodiment, the elastic element 2436 is compressed between the second locking element 2432 and the fixing element 2437. The elastic force generated by the elastic element 2436 drives the second locking element 2432 to press the first swing arm 234, the second swing arm 235, the first synchronous gear 236, and the second synchronous gear 237. Through the locking structure between the second locking element 2432 and the first swing arm 234, the second swing arm 235, the first synchronous gear 236, and the second synchronous gear 237, this embodiment allows the first swing arm 234, the second swing arm 235, the first synchronous gear 236, and the second synchronous gear 237 to remain in certain positions. When the first rotating end 2341 of the first swing arm 234, the second rotating end 2351 of the second swing arm 235, the first synchronous gear 236, and the second synchronous gear 237 rotate relative to the first locking member 2431 and the second locking member 2432, the relative positions of the first protrusion 2364 of the first synchronous gear 236, the second protrusion 2374 of the second synchronous gear 237, the third protrusion 2345 of the first swing arm 234, the fourth protrusion 2355 of the second swing arm 235, and the multiple protrusions 2432-4 of the second locking member 2432 change, thus forming different locking structures.

[0137] Specifically, when the first swing arm 234 and the second swing arm 235 move relative to each other, the first rotating end 2341 of the first swing arm 234, the second rotating end 2351 of the second swing arm 235, and the first and second synchronous gears 236 and 237 need to be switched from one locking structure to another with the first locking member 2431 and the second locking member 2432. During the switching process, the second locking member 2432 moves away from the first locking member 2431, and the elastic member 2436 is further compressed. The elastic force generated by the elastic member 2436 forms a motion damping force, so that the first swing arm 234 and the second swing arm 235 require a certain driving force to move relative to each other. In short, the locking structure between the second locking member 2432 and the first swing arm 234, the second swing arm 235, the first synchronous gear 236, and the second synchronous gear 237 can provide motion damping force for the relative movement of the first swing arm 234 and the second swing arm 235.

[0138] See Figure 11 , Figure 19 and Figure 21As shown, the second abutting portion 2341-2 of the first rotating end 2341 abuts against the body 2431-3 of the first locking member 2431, a portion of the first abutting portion 2341-1 abuts against the protrusion 2431-4 of the first locking member 2431, and a gap 244 exists between the other portion of the first abutting portion 2341-1 and the body 2431-3 of the first locking member 2431. In this embodiment, by setting a gap between the part of the structure of the first rotating end 2341 facing the first locking member 2431 and the first locking member 2431, the contact area can be reduced, thus reducing friction. If the contact area between the end of the first rotating end 2341 facing the first locking member 2431 and the first locking member 2431 is too small, there is no tactile feedback when folding or opening; if the contact area between the end of the first rotating end 2341 facing the first locking member 2431 and the first locking member 2431 is too large, it is difficult to fold or open. This application can control the folding or unfolding feel of the electronic device 100 by adjusting the contact area between the end of the first rotating end 2341 facing the first locking member 2431 and the first locking member 2431.

[0139] The cooperation relationship between the third abutting part 2351-1 and the fourth abutting part 2351-2 of the second rotating end 2351 and the first locking member 2431 is referred to the cooperation relationship between the first abutting part 2341-1 and the second abutting part 2341-2 of the first rotating end 2341 and the first locking member 2431, and will not be repeated here.

[0140] like Figure 16 , Figure 17 and Figure 22 As shown, Figure 22 This is an exploded structural diagram of the first support 232, the second support 233, the first moving component 241, the second moving component 242, the first swing arm 234, and the second swing arm 235. The first support 232 is rotatably connected to the first moving component 241. Exemplarily, the first mounting portion 2322 of the first support 232 is rotatably connected to the first end 2411-1 of the first connecting portion 2411 of the first moving component 241. The first arcuate strip 2322-2 of the first mounting portion 2322 is located within the third arcuate groove 2411-3 of the first end 2411-1. The first arcuate strip 2322-2 of the first mounting portion 2322 engages with the third arcuate groove 2411-3 of the first end 2411-1 and can move within the third arcuate groove 2411-3 of the first end 2411-1, thereby achieving the rotatable connection between the first support 232 and the first moving component 241. It is understandable that the curvature of the first arc-shaped strip 2322-2 of the first mounting part 2322 can be consistent with the curvature of the third arc-shaped groove 2411-3 of the first end 2411-1.

[0141] The second mounting portion 2323 of the first bracket 232 is rotatably connected to the second end 2411-2 of the first connecting portion 2411 of the first moving member 241. The third arc-shaped strip 2411-4 of the second end 2411-2 is located within the first arc-shaped groove 2323-1 of the second mounting portion 2323. The third arc-shaped strip 2411-4 of the second end 2411-2 cooperates with the first arc-shaped groove 2323-1 of the second mounting portion 2323 and can move within the first arc-shaped groove 2323-1 of the second mounting portion 2323 to achieve the rotatable connection between the first bracket 232 and the first moving member 241. It can be understood that the curvature of the third arc-shaped strip 2411-4 of the second end 2411-2 can be consistent with the curvature of the first arc-shaped groove 2323-1 of the second mounting portion 2323.

[0142] The second bracket 233 is rotatably connected to the second moving member 242. Exemplarily, the fourth mounting portion 2332 of the second bracket 233 is rotatably connected to the third end 2421-1 of the second connecting portion 2421 of the second moving member 242. The second arcuate strip 2332-2 of the fourth mounting portion 2332 is located within the fourth arcuate groove 2421-3 of the third end 2421-1. The second arcuate strip 2332-2 of the fourth mounting portion 2332 engages with the fourth arcuate groove 2421-3 of the third end 2421-1 and can move within the fourth arcuate groove 2421-3 of the third end 2421-1, thereby achieving the rotatable connection between the second bracket 233 and the second moving member 242. It is understood that the curvature of the second arcuate strip 2332-2 of the fourth mounting portion 2332 can be consistent with the curvature of the fourth arcuate groove 2421-3 of the third end 2421-1.

[0143] The fifth mounting portion 2333 of the second bracket 233 is rotatably connected to the fourth end 2421-2 of the second connecting portion 2421 of the second moving member 242. The sixth arc-shaped strip 2421-4 of the fourth end 2421-2 is located within the second arc-shaped groove 2333-1 of the fifth mounting portion 2333. The sixth arc-shaped strip 2421-4 of the fourth end 2421-2 cooperates with the second arc-shaped groove 2333-1 of the fifth mounting portion 2333 and can move within the second arc-shaped groove 2333-1 of the fifth mounting portion 2333 to achieve the rotatable connection between the second bracket 233 and the second moving member 242. It can be understood that the curvature of the sixth arc-shaped strip 2421-4 of the fourth end 2421-2 can be consistent with the curvature of the second arc-shaped groove 2333-1 of the fifth mounting portion 2333.

[0144] The above is only one way of rotating the first support 232 and the first moving part 241 and the second support 233 and the second moving part 242. The first support 232 and the first moving part 241 and the second support 233 and the second moving part 242 can also be rotatably connected in the form of a solid shaft through a rotating shaft.

[0145] See also Figure 15 , Figure 19 and Figure 22 The first sliding end 2342 of the first swing arm 234 is slidably connected to the third mounting portion 2324 of the first bracket 232. For example, the first main sliding portion 2346 of the first sliding end 2342 is correspondingly disposed with the first main groove 2324-2 of the third mounting portion 2324, the first side portion 2347 of the first sliding end 2342 is engaged with the first side groove 2324-3 of the third mounting portion 2324, and the second side portion 2348 of the first sliding end 2342 is engaged with the second side groove 2324-4 of the third mounting portion 2324. The first sliding end 2342 can slide within the third mounting portion 2324 to achieve a sliding connection between the first swing arm 234 and the first bracket 232.

[0146] The second sliding end 2352 of the second swing arm 235 is slidably connected to the sixth mounting portion 2334 of the second bracket 233. For example, the second main sliding portion 2356 of the second sliding end 2352 is correspondingly disposed with the second main groove 2334-2 of the sixth mounting portion 2334, the third side portion 2357 of the second sliding end 2352 is engaged with the third side groove 2334-3 of the sixth mounting portion 2334, and the fourth side portion 2358 of the second sliding end 2352 is engaged with the fourth side groove 2334-4 of the sixth mounting portion 2334. The second sliding end 2352 can slide within the sixth mounting portion 2334 to achieve a sliding connection between the second swing arm 235 and the second bracket 233.

[0147] In some embodiments, the first sliding end 2342 of the first swing arm 234 may be provided with a sliding groove, and the third mounting portion 2324 of the first bracket 232 may be provided with a sliding structure. The sliding structure of the third mounting portion 2324 cooperates with the sliding groove of the first swing arm 234 to achieve a sliding connection between the first swing arm 234 and the first bracket 232. Alternatively, the second sliding end 2352 of the second swing arm 235 may be provided with a sliding groove, and the sixth mounting portion 2334 of the second bracket 233 may be provided with a sliding structure. The sliding structure of the sixth mounting portion 2334 cooperates with the sliding groove of the second swing arm 235 to achieve a sliding connection between the second swing arm 235 and the second bracket 233. This application does not describe the sliding connection method between the first swing arm 234 and the first bracket 232, or the sliding connection method between the second swing arm 235 and the second bracket 233.

[0148] See also Figure 10A , Figure 10B , Figure 17 and Figure 23 , Figure 23This is a partial structural schematic diagram of the folding mechanism 23. The first moving member 241 is rotatably connected to the main shaft 231, so that the first support 232 is connected to the main shaft 231. Exemplarily, the first arc-shaped arm 2413 of the first moving member 241 is rotatably connected to the first mounting space 2312-8 of the fixing member 2312 of the main shaft 2311. The fourth arc-shaped strip 2413-2 of the first arc-shaped arm 2413 engages with the second gap 2312c of the first mounting space 2312-8. The second gap 2312c can be an arc-shaped space used to cooperate with the fourth arc-shaped strip 2413-2, realizing the rotatable connection between the first moving member 241 and the main shaft 231. The fifth arcuate strip 2413-3 of the first arcuate arm 2413 engages with the first gap 2312b of the first mounting space 2312-8. The first gap 2312b can be an arcuate space used to cooperate with the fifth arcuate strip 2413-3 to achieve a rotational connection between the first moving component 241 and the main shaft 231. The first main arcuate arm 2413-1 of the first arcuate arm 2413 is located in the space between the first gap 2312b and the second gap 2312c. The first arcuate arm 2413 can rotate within the first mounting space 2312-8 to achieve a rotational connection between the first moving component 241 and the main shaft 231.

[0149] In this embodiment, the cooperation between the first moving component 241 and the main shaft 231 forms a virtual axis rotational connection structure, which can reduce the design difficulty of the folding mechanism 23, lower the size requirements of the folding mechanism 23, and is conducive to the thinning and lightening of the folding mechanism 23. In some other embodiments, the first moving component 241 and the main shaft 231 can also be rotated through a physical shaft, and this application embodiment does not strictly limit this.

[0150] The second moving component 242 is rotatably connected to the main shaft 231, so that the second bracket 233 is connected to the main shaft 231. Exemplarily, the second arcuate arm 2423 of the second moving component 242 is rotatably connected to the second mounting space 2312-9 of the fixing member 2312 of the main shaft 231. The seventh arcuate strip 2423-2 of the second arcuate arm 2423 engages with the fourth gap 2312e of the second mounting space 2312-9. The fourth gap 2312e can be an arcuate space for cooperating with the seventh arcuate strip 2423-2 to achieve a rotatable connection between the second moving component 242 and the main shaft 231. The eighth arcuate strip 2423-3 of the second arcuate arm 2423 engages with the third gap 2312d of the second mounting space 2312-9. The third gap 2312d can be an arcuate space for cooperating with the eighth arcuate strip 2423-3 to achieve a rotatable connection between the second moving component 242 and the main shaft 231. The second main arc arm 2423-1 of the second arc arm 2423 is located in the space between the third gap 2312d and the fourth gap 2312e. The second arc arm 2423 can rotate in the second mounting space 2312-9 to realize the rotational connection between the second moving part 242 and the main shaft 231.

[0151] In this embodiment, the cooperation between the second moving component 242 and the main shaft 231 forms a virtual axis rotational connection structure, which can reduce the design difficulty of the folding mechanism 23, lower the size requirements of the folding mechanism 23, and is conducive to the thinning and lightening of the folding mechanism 23. In some other embodiments, the second moving component 242 and the main shaft 231 can also be rotated through a physical shaft, and this application embodiment does not strictly limit this.

[0152] like Figure 6 , Figure 23 and Figure 24 As shown, Figure 24 This is a structural schematic diagram of the first door panel 238 and the second door panel 239. The first door panel 238 and the second door panel 239 are located on the second side 2316 of the main shaft 231. The first door panel 238 has a plate-like structure. The first door panel 238 includes a first limiting hole 2382, a fifth assembly hole 2383, a sixth assembly hole 2384, a first plate edge 2385, and a second plate edge 2386. The first plate edge 2385 and the second plate edge 2386 are arranged opposite to each other, and the first limiting hole 2382, the fifth assembly hole 2383, and the sixth assembly hole 2384 are located between the first plate edge 2385 and the second plate edge 2386. The position and number of the first limiting hole 2382, the fifth assembly hole 2383, and the sixth assembly hole 2384 on the first door panel 238 can be set as needed, and this application does not limit them.

[0153] The second door panel 239 includes a second limiting hole 2392, a seventh assembly hole 2393, an eighth assembly hole 2394, a third edge 2395, and a fourth edge 2396. The third edge 2395 and the fourth edge 2396 are arranged opposite to each other, and the second limiting hole 2392, the seventh assembly hole 2393, and the eighth assembly hole 2394 are located between the third edge 2395 and the fourth edge 2396. The position and number of the second limiting hole 2392, the seventh assembly hole 2393, and the eighth assembly hole 2394 on the second door panel 239 can be set as needed, and this application does not limit them.

[0154] The first door panel 238 is fixedly connected to the first moving component 241. During the installation of the first door panel 238, the first limiting post 2413-6 of the first moving component 241 passes through the first limiting hole 2382 of the first door panel 238, achieving the initial positioning and installation of the first door panel 238 and the first moving component 241. The fifth assembly hole 2383 of the first door panel 238 corresponds to the second assembly hole 2413-5 of the first moving component 241, and the fasteners ( Figure 23 and Figure 24(Not shown) A fixed connection is achieved through the fifth assembly hole 2383 and the second assembly hole 2413-5. The sixth assembly hole 2384 of the first door panel 238 is correspondingly set with the first assembly hole 2411-5 of the first moving part 241, and the fastener ( Figure 23 and Figure 24 (Not shown) Passing through the sixth assembly hole 2384 and the first assembly hole 2411-5 to achieve a fixed connection between the first door panel 238 and the first moving member 241.

[0155] The second door panel 239 is fixedly connected to the second moving component 242. During the installation of the second door panel 239, the second limiting post 2423-6 of the second moving component 242 passes through the second limiting hole 2392 of the second door panel 239, achieving the initial positioning and installation of the second door panel 239 and the second moving component 242. The seventh assembly hole 2393 of the second door panel 239 is correspondingly set with the fourth assembly hole 2423-5 of the second moving component 242, and the fasteners ( Figure 23 and Figure 24 (Not shown) A fixed connection is achieved through the seventh assembly hole 2393 and the fourth assembly hole 2423-5. The eighth assembly hole 2394 of the second door panel 239 is correspondingly set with the third assembly hole 2421-5 of the second moving part 242, and the fastener ( Figure 23 and Figure 24 (Not shown) Passing through the eighth assembly hole 2394 and the third assembly hole 2421-5 to achieve a fixed connection between the second door panel 239 and the second moving member 242.

[0156] When the first moving member 241 and the second moving member 242 unfold or fold relative to each other, they can drive the first door panel 238 and the second door panel 239 to unfold or fold relative to each other. When the first door panel 238 and the second door panel 239 unfold relative to each other, they are used to jointly support the flexible display screen, forming a mechanical support for the flexible display screen. During the relative folding process of the first door panel 238 and the second door panel 239, space is created to accommodate the flexible display screen.

[0157] like Figure 7 , Figure 25 and Figure 26 As shown, Figure 25 for Figure 7 The diagram shows the structure of the folding mechanism 23 in the folded state. Figure 26 for Figure 25The diagram shows the structure of the folding mechanism 23 assembled with the flexible display screen 10. The first rotating end 2341 of the first swing arm 234 meshes with the first tooth 2361 of the first synchronous gear 236, and the second rotating end 2351 of the second swing arm 235 meshes with the fourth tooth 2372 of the second synchronous gear 237. The second tooth 2362 of the first synchronous gear 236 meshes with the third tooth 2371 of the second synchronous gear 237. In this embodiment, the first rotating end 2341 of the first swing arm 234 and the second rotating end 2351 of the second swing arm 235 are connected by the first synchronous gear 236 and the second synchronous gear 237, so that the rotation angle of the first rotating end 2341 of the first swing arm 234 and the rotation angle of the second rotating end 2351 of the second swing arm 235 are the same in magnitude and opposite in direction, ensuring that the rotation of the first swing arm 234 and the second swing arm 235 relative to the main shaft 231 remains synchronized, that is, they synchronously move closer to or further away from each other.

[0158] Since the first sliding end 2342 of the first swing arm 234 is slidably connected to the first bracket 232, and the second sliding end 2352 of the second swing arm 235 is slidably connected to the second bracket 233, during the rotation of the first bracket 232 and the second bracket 233 relative to the main shaft 231, the first swing arm 234 will affect the rotation angle of the first bracket 232, and the second swing arm 235 will affect the rotation angle of the second bracket 233, so that the rotation of the first bracket 232 and the second bracket 233 relative to the main shaft 231 remains synchronized, that is, they move closer to each other or further away from each other in sync, so as to improve the mechanical operation experience of the housing device 20 and the electronic device 100.

[0159] See also Figure 12A and Figure 25In some embodiments, the radius R1 of the tip circle of the first tooth portion 2361 can be larger than the radius R2 of the tip circle of the second tooth portion 2362, and the radius R4 of the tip circle of the fourth tooth portion 2372 can be larger than the radius R3 of the tip circle of the third tooth portion 2371. Within the same accommodating space, a larger radius of the synchronizing gear allows for a smaller number of synchronizing gears to be installed, resulting in a smaller cumulative transmission error (relative to a smaller radius of the synchronizing gear, where a smaller radius allows for a larger number of synchronizing gears, but leads to a larger cumulative transmission error). However, when the radius of the synchronizing gear is large, during the folding process of the folding mechanism, the larger radius synchronizing gear may abut against the flexible display screen, damaging it. In this embodiment, by setting the radius R1 of the tip circle of the first tooth portion 2361 to be greater than the radius R2 of the tip circle of the second tooth portion 2362, and the radius R4 of the tip circle of the fourth tooth portion 2372 to be greater than the radius R3 of the tip circle of the third tooth portion 2371, the dimensions of the first synchronous gear 236 and the second synchronous gear 237 at different positions can be flexibly adjusted. By using the first synchronous gear 236 with a larger sum of R1 and R2 and the second synchronous gear 237 with a larger sum of R3 and R4, the number of synchronous gears can be reduced, and the cumulative transmission error of the synchronous gears can be reduced. That is, by using as few synchronous gears as possible, the first swing arm 234 and the second swing arm 235 move synchronously, and the first support 232 and the second support 233 move synchronously. Furthermore, by setting the second tooth portion 2361 to be greater than the radius R2 of the tip circle of the second tooth portion 2362, the dimensions of the first synchronous gear 2361 and the second synchronous gear 237 can be flexibly adjusted. The smaller size of the tip circle of the second tooth 2362 and the third tooth 2371 of the first synchronous gear 236 and the third tooth 2371 of the second synchronous gear 237, when the folding mechanism 23 is in the closed state, prevents the second tooth 2362 of the first synchronous gear 236 and the third tooth 2371 of the second synchronous gear 237 from abutting against the flexible display screen (during the folding process, the second tooth 2362 of the first synchronous gear 236 moves towards the second side 2316 of the main shaft 231 and approaches the flexible display screen, and the third tooth 2371 of the second synchronous gear 237 moves towards the second side 2316 of the main shaft 231 and approaches the flexible display screen. If the tip circle of the second tooth 2362 and the third tooth 2371 is larger, they will abut against the flexible display screen 10), thus increasing the screen storage space.

[0160] Furthermore, the first tooth portion 2361 of this application has a larger tip circle size, which meshes with the first swing arm 234. Similarly, the fourth tooth portion 2372 has a larger tip circle size, which meshes with the second swing arm 235. This arrangement of the first tooth portion 2361 and the fourth tooth portion 2372 helps reduce the number of synchronous gears and increases motion accuracy. In other words, this embodiment can use as few synchronous gears as possible to provide as much screen space as possible. This ensures that the first support 232 and the second support 233 of the folding mechanism 23 can be folded or opened synchronously within a limited space, especially when the electronic device 100 is designed to be miniaturized. Fewer synchronous gears and larger gear sizes result in smaller cumulative transmission errors, which improves motion accuracy.

[0161] For example, when the folding mechanism 23 is in the open state, the vertical projection of the first synchronous gear 236 on the plane where the first door panel 238 is located overlaps at least partially with the first door panel 238, and the vertical projection of the second synchronous gear 237 on the plane where the second door panel 239 is located overlaps at least partially with the second door panel 239.

[0162] When the folding mechanism 23 is in the unfolded state, the second tooth 2362, away from the first side 2315 of the main shaft 231, and the third tooth 2371, away from the first side 2315 of the main shaft 231, mesh, while the second tooth 2362 and the third tooth 2371 are close to the first side 2315 of the main shaft 231. The first tooth 2361 is away from the first side 2315 of the main shaft 231 and is near the flexible display screen 10, while the fourth tooth 2372 is away from the first side 2315 of the main shaft 231 and is close to the flexible display screen 10. When the folding mechanism 23 is in the closed state, the second tooth 2362, near the first side 2315 of the main shaft 231, and the third tooth 2371, near the first side 2315 of the main shaft 231, mesh, while the second tooth 2362 and the third tooth 2371 are away from the first side 2315 of the main shaft 231 and are close to the flexible display screen 10. The first tooth 2361 is close to the first side 2315 of the main shaft 231 and away from the flexible display screen 10, and the fourth tooth 2372 is close to the first side 2315 of the main shaft 231 and away from the flexible display screen 10. When the folding mechanism 23 is folded from the unfolded state to the closed state, the second tooth 2362 moves towards the second side 2316 of the main shaft 231, the third tooth 2371 moves towards the second side 2316 of the main shaft 231, the first tooth 2361 moves towards the first side 2315 of the main shaft 231, and the fourth tooth 2372 rotates towards the first side 2315 of the main shaft 231 to avoid the first door panel 238, the second door panel 239 and the flexible display screen 10. When the folding mechanism 23 is unfolded from the closed state to the unfolded state, the second tooth 2362 rotates toward the first side 2315 of the main shaft 231, the third tooth 2371 rotates toward the first side 2315 of the main shaft 231, the first tooth 2361 rotates away from the first side 2315 of the main shaft 231, and the fourth tooth 2372 rotates away from the first side 2315 of the main shaft 231.

[0163] In this embodiment, by setting the tip circle size of the second tooth 2362 and the third tooth 2371 to be small, it is possible to avoid the second tooth 2362 and the third tooth 2371 abutting against the flexible display screen 10 and damaging the flexible display screen 10 when the folding mechanism 23 is folded from the unfolded state to the closed state. Furthermore, by setting the radii of the tip circles of the second tooth 2362 and the third tooth 2371 to be smaller, this application can increase the screen-accommodating space of the folding mechanism 23 in the closed state. (During the folding process, the second tooth 2362 of the first synchronous gear 236 moves towards the second side 2316 of the main shaft 231 and approaches the flexible display screen, and the third tooth 2371 of the second synchronous gear 237 moves towards the second side 2316 of the main shaft 231 and approaches the flexible display screen. If the size of the tip circles of the second tooth 2362 and the third tooth 2371 is set to be larger, the space occupied by the second tooth 2362 and the third tooth 2371 will be larger, resulting in a smaller screen-accommodating space for the folding mechanism 23.) In this way, even if the folding mechanism 23 tends to be miniaturized, there will still be enough space to accommodate the display screen, avoiding the situation where the flexible display screen 10 bends less in the folded state due to the miniaturization of the folding mechanism 23, thus preventing creases from appearing on the flexible display screen 10, which would affect the quality of the electronic device 100 and the user experience.

[0164] Without the design of first tooth 2361 and second tooth 2362 of different sizes, and third tooth 2371 and fourth tooth 2372 of different sizes, the first synchronous gear 236 would use teeth of the same size, and the second synchronous gear 237 would use teeth of the same size. This would increase the space occupied by the first synchronous gear 236 and the second synchronous gear 237 in the folding mechanism 23, and the first synchronous gear 236 and the second synchronous gear 237 would either abut against the flexible display screen 10 or reduce the space occupied by the flexible display screen 10.

[0165] In some embodiments of this application, the first door panel 238 is fixedly connected to the first moving member 241, and the second door panel 239 is fixedly connected to the second moving member 242. During the rotation of the first moving member 241 relative to the main shaft 231 and relative to the first bracket 232, the first door panel 238 moves; during the rotation of the second moving member 242 relative to the main shaft 231 and relative to the second bracket 233, the second door panel 239 moves. The first door panel 238 and the second door panel 239 can be folded or opened relative to each other. Since the first door panel 238 is fixed to the first moving member 241 and the second door panel 239 is fixed to the second moving member 242, during the relative unfolding or folding of the folding mechanism 23, the first door panel 238 does not rotate relative to the first moving member 241, and the second door panel 239 does not rotate relative to the second moving member 242. This avoids the first tooth 2361 with a larger tooth tip circle size from abutting against the first door panel 238 and hindering the movement of the first door panel 238, or the fourth tooth 2372 with a larger tooth tip circle size from abutting against the second door panel 239 and hindering the movement of the second door panel 239, during the relative folding or opening of the folding mechanism 23. This allows the first door panel 238 and the second door panel 239 to avoid the first tooth 2361 and the fourth tooth 2372.

[0166] In some embodiments, when the folding mechanism 23 is in the closed state, the rotation center of the first rotating end 2341 is located on the side of the plane where the first door panel 238 is located that is away from the flexible display screen 10, and the rotation center of the second rotating end 2351 is located on the side of the plane where the second door panel 239 is located that is away from the flexible display screen 10. Taking the first rotating end 2341 of the first swing arm 234 and the first door panel 238 as examples, in this embodiment, by setting the rotation center of the first rotating end 2341 to the side of the first door panel 238 away from the flexible display screen 10, it is beneficial to form a teardrop-shaped screen-accommodating space in the folded state and to increase the screen-accommodating space. When folding from an unfolded state to a closed state, the rotation angle of the first door panel 238 is generally greater than that of the first swing arm 234. If the rotation center of the first rotating end 2341 is on the side of the first door panel 238 facing the flexible display screen 10, when the electronic device 100 is folded to the same state (compared to the side of the first door panel 238 away from the flexible display screen 10), the first door panel 238 needs to rotate a larger angle, which will reduce the screen space. Furthermore, if the rotation center of the first rotating end 2341 is on the side of the first door panel 238 facing the flexible display screen 10, the first swing arm 234 and the first door panel 238 are more prone to positional interference, and the avoidance requirements between the first door panel 238 and the first swing arm 234 are higher. In this embodiment, by setting the rotation center of the first rotating end 2341 to always be on the side of the first door panel 238 away from the flexible display screen 10, the probability of interference between the two is small.

[0167] In some embodiments, the second edge 2386 of the first door panel 238 includes a first clearance structure 2387, and the third edge 2395 of the second door panel 239 includes a second clearance structure 2397. Exemplarily, the first clearance structure 2387 and the second clearance structure 2397 can both be inclined surfaces. When the folding mechanism 23 is in the unfolded state, the second edge 2386 is close to the second door panel 239, and the third edge 2395 is close to the first door panel 238. The first clearance structure 2387 is located on the side of the first door panel 238 facing away from the flexible display screen, and the second clearance structure 2397 is located on the side of the second door panel 239 facing away from the flexible display screen. The first clearance structure 2387 and the second clearance structure 2397 are used to prevent the first door panel 238 and the second door panel 239 from colliding with the larger first tooth 2361 and fourth tooth 2372 during the relative folding or opening of the folding mechanism 23, thus avoiding affecting the folding or opening of the folding mechanism 23. In other embodiments, the first clearance structure 2387 can be an L-shaped recess, and the second clearance structure 2397 can be an L-shaped recess. This application does not limit the specific structure of the first clearance structure 2387 and the second clearance structure 2397.

[0168] See also Figure 7 , Figure 12B and Figure 25 The first synchronous gear 236 also includes a first toothless portion 2365 and a second toothless portion 2366. The first toothed portion 2361 and the second toothed portion 2362 are spaced apart. Both the first toothless portion 2365 and the second toothless portion 2366 are located between the first toothed portion 2361 and the second toothed portion 2362 and are spaced apart. The first toothless portion 2365 is closer to the first side 2315 than the second toothless portion 2366, and the second toothless portion 2366 is closer to the second side 2316 than the first toothless portion 2365. The curvature of the first toothless portion 2365 is greater than that of the second toothless portion 2366. By setting the curvature of the first toothless portion 2365 to be greater than that of the second toothless portion 2366, multiple teeth of the second toothed portion 2362 are prevented from abutting the bottom of the outer cover plate 2311 when the folding mechanism 23 is in the unfolded state. This helps to reduce the space occupied by the first synchronous gear 236 in the thickness direction of the electronic device 100 when the folding mechanism 23 is in the unfolded state.

[0169] In some embodiments, the tooth connecting the first toothed portion 2361 and the first toothless portion 2365 is designated as the first tooth 2361-1, the tooth connecting the second toothed portion 2362 and the first toothless portion 2365 is designated as the second tooth 2362-1, the tooth connecting the first toothed portion 2361 and the second toothless portion 2366 is designated as the third tooth 2361-2, and the tooth connecting the second toothed portion 2362 and the second toothless portion 2366 is designated as the fourth tooth 2362-2. The first tooth 2361-1 and the second tooth 2362-1 are connected to both ends of the first toothless portion 2365, and the third tooth 2361-2 and the fourth tooth 2362-2 are connected to both ends of the second toothless portion 2366. The distance L4 between the tip of the first tooth 2361-1 and the tip of the second tooth 2362-1 is greater than the distance L5 between the tip of the third tooth 2361-2 and the tip of the fourth tooth 2362-2. This prevents multiple teeth of the second tooth 2362 from abutting against the bottom of the outer cover plate 2311 when the folding mechanism 23 is in the unfolded state. This helps to reduce the space occupied by the first synchronous gear 236 in the thickness direction of the electronic device 100 in the unfolded state.

[0170] The second synchronizing gear 237 includes a third toothless portion 2375 and a fourth toothless portion 2376. The structures of the third toothless portion 2375 and the fourth toothless portion 2376 are described with reference to the first toothless portion 2365 and the second toothless portion 2366, and will not be repeated here.

[0171] like Figure 27A As shown, Figure 27A This is an exploded structural diagram of the first swing arm 234, the first synchronous gear 236, the second synchronous gear 237, and the second swing arm 235. In some embodiments, the radius R1 of the tip circle of the first tooth 2361 is greater than the radius R5 of the tip circle of the first rotating end 2341, and the radius R4 of the tip circle of the fourth tooth 2372 is greater than the radius R6 of the tip circle of the second rotating end 2351. During the folding or unfolding process of the folding mechanism 23, the rotation angle of the first tooth 2361 is smaller than the rotation angle of the first swing arm 234, and the rotation angle of the fourth tooth 2372 is smaller than the rotation angle of the second swing arm 235. This helps to prevent the first tooth 2361 and the fourth tooth 2372, which have larger tip circle sizes, from obstructing the movement of the first door panel 238 and the second door panel 239 when their rotation angles are too large.

[0172] In some embodiments, the radius of the pitch circle of the first tooth portion 2361 is larger than the radius of the pitch circle of the first rotating end 2341, and the radius of the pitch circle of the fourth tooth portion 2372 is larger than the radius of the pitch circle of the second rotating end 2351. When the size of the tip circle changes, the size of the pitch circle changes accordingly.

[0173] Other synchronous gears may also be provided between the first synchronous gear 236 and the second synchronous gear 237, that is, the first synchronous gear 236 and the second synchronous gear 237 may mesh indirectly. The other synchronous gears between the first synchronous gear 236 and the second synchronous gear 237 may be designed with two tooth sections with different addendum circles, or they may be designed with tooth sections with the same addendum circles. This application does not limit this.

[0174] Figure 27B This is a schematic diagram of a combined structure of a first swing arm 234, a first synchronous gear 236, a second synchronous gear 237, and a second swing arm 235, provided for embodiments of this application. The distance from the rotation center of the first rotating end 2341 to the rotation center of the first synchronous gear 236 is a first distance L1, the distance from the rotation center of the first synchronous gear 236 to the rotation center of the second synchronous gear 237 is a second distance L2, and the distance from the rotation center of the second rotating end 2351 to the rotation center of the second synchronous gear 237 is a third distance L3. The first distance L1 is greater than the second distance L2, and the third distance L3 is greater than the second distance. Taking the first spacing L1 being greater than the second spacing L2 as an example, it is beneficial to reserve sufficient space for the setting of the first rotating end 2341 and the first tooth 2361 of the first synchronous gear 236. The size of the tooth tip circle of the first tooth 2361 can be increased as needed to reduce the angle of rotation of the first tooth 2361 during the folding or opening of the folding mechanism 23, thus avoiding the first tooth 2361 from hitting the first door panel 238 during rotation. Furthermore, by setting the distance between the rotation center of the first rotating end 2341 and the rotation center of the first synchronous gear 236 to be larger, it is beneficial to set the rotation center of the first rotating end 2341 to be located on the side of the plane where the first door panel 238 is located away from the flexible display screen 10 when the folding mechanism 23 is in the closed state. This helps to avoid the first tooth 2361 from colliding with the first door panel 238 and also helps to increase the screen-accommodating space of the folding mechanism 23.

[0175] like Figure 28 and Figure 29 As shown, Figure 28 for Figure 6 The structure shown is a cross-sectional view at BB. Figure 29 for Figure 28 The diagram shows the structure in another usage state. Figure 28 The structure shown is in a flattened state. Figure 29The structure shown is in a folded state. In some embodiments, the first mounting portion 2322 of the first bracket 232 is rotatably connected to the first end 2411-1 of the first moving member 241. When the folding mechanism 23 unfolds from a closed state to an unfolded state, the first arcuate strip 2322-2 of the first mounting portion 2322 rotates out of the third arcuate groove 2411-3 of the first end 2411-1. When the folding mechanism 23 folds from an unfolded state to a closed state, the first arcuate strip 2322-2 of the first mounting portion 2322 rotates into the third arcuate groove 2411-3 of the first end 2411-1. In this embodiment, the rotational connection between the first bracket 232 and the first moving member 241 is achieved by the rotation of the first arcuate strip 2322-2 of the first mounting portion 2322 within the third arcuate groove 2411-3 of the first end 2411-1, resulting in a simple connection method. In other embodiments, the first bracket 232 and the first moving member 241 can also be rotatably connected by a pin or other means, which is not limited in this application.

[0176] In some embodiments, in conjunction with reference Figure 16 , Figure 17 , Figure 28 and Figure 29 The first moving component 241 is slidably connected to the first bracket 232. The first end 2411-1 of the first moving component 241 has a first hole 2411-6, which is spaced apart from the third arc-shaped groove 2411-3. The first mounting portion 2322 of the first bracket 232 has a first shaft 2322-3, which passes through the first hole 2411-6 and can slide within it. By configuring the first shaft 2322-3 to cooperate with the first hole 2411-6, this application prevents the first arc-shaped strip 2322-2 of the first bracket 232 from disengaging when moving within the third arc-shaped groove 2411-3 of the first moving component 241, without affecting the relative folding or unfolding of the first bracket 232 and the first moving component 241.

[0177] Understandably, the first shaft 2322-3 and the first mounting part 2322 can be an integral structure, or the first mounting part 2322 can have a hole, and the first shaft 2322-3 can be inserted into the hole of the first mounting part to fix the first shaft 2322-3 to the first mounting part 2322 of the first bracket 232.

[0178] The second moving part 242 is slidably connected to the second bracket 233. The second moving part 242 is provided with a second hole 2421-6, and the second bracket 233 is provided with a second shaft 2332-3. The connection method between the second shaft 2332-3 and the second hole 2421-6 is the same as that between the first shaft 2322-3 and the first hole 2411-6, and will not be described again here.

[0179] The fourth mounting portion 2332 of the second bracket 233 is rotatably connected to the third end 2421-1 of the second moving member 242. When the folding mechanism 23 unfolds from the closed state to the unfolded state, the second arcuate strip 2332-2 of the fourth mounting portion 2332 rotates out of the fourth arcuate groove 2421-3 of the third end 2421-1. When the folding mechanism 23 folds from the unfolded state to the closed state, the second arcuate strip 2332-2 of the fourth mounting portion 2332 rotates into the fourth arcuate groove 2421-3 of the third end 2421-1. In this embodiment, the rotational connection between the second bracket 233 and the second moving member 242 is achieved by the rotation of the second arcuate strip 2332-2 of the fourth mounting portion 2332 within the fourth arcuate groove 2421-3 of the third end 2421-1, resulting in a simple connection method. In other embodiments, the second bracket 233 and the second moving member 242 may also be rotatably connected by a pin or other means, which is not limited in this application.

[0180] It is understood that the first moving component 241 can be rotatably connected to the first bracket 232, or the first moving component 241 can be slidably connected to the first bracket 232, or the first moving component 241 can be both rotatably connected to the first bracket 232 and slidably connected to the first bracket 232. The second moving component 242 can be rotatably connected to the second bracket 233, or the second moving component 242 can be both rotatably connected to the second bracket 233 and slidably connected to the second bracket 233.

[0181] like Figure 30 and Figure 31 As shown, Figure 30 for Figure 6 The structure shown is a cross-sectional view at CC. Figure 31 for Figure 30 The diagram shows the structure in its folded state.

[0182] The second mounting portion 2323 of the first bracket 232 is rotatably connected to the second end 2411-2 of the first moving member 241. When the folding mechanism 23 unfolds from a closed state to an unfolded state, the third arcuate strip 2411-4 of the second end 2411-2 rotates out of the first arcuate groove 2323-1 of the second mounting portion 2323. When the folding mechanism 23 folds from an unfolded state to a closed state, the third arcuate strip 2411-4 of the second end 2411-2 rotates into the first arcuate groove 2323-1 of the second mounting portion 2323. In this embodiment, the rotational connection between the first bracket 232 and the first moving member 241 is achieved by the rotation of the third arcuate strip 2411-4 of the second end 2411-2 within the first arcuate groove 2323-1 of the second mounting portion 2323, resulting in a simple connection method. In other embodiments, the first bracket 232 and the first moving member 241 may also be rotatably connected by a pin or other means, which is not limited in this application.

[0183] The fifth mounting portion 2333 of the second bracket 233 is rotatably connected to the fourth end 2421-2 of the second moving member 242. When the folding mechanism 23 unfolds from the closed state to the unfolded state, the sixth arcuate strip 2421-4 of the fourth end 2421-2 rotates out of the second arcuate groove 2333-1 of the fifth mounting portion 2333. When the folding mechanism 23 folds from the unfolded state to the closed state, the sixth arcuate strip 2421-4 of the fourth end 2421-2 rotates into the second arcuate groove 2333-1 of the fifth mounting portion 2333. In this embodiment, the rotatable connection between the second bracket 233 and the second moving member 242 is achieved by the rotation of the sixth arcuate strip 2421-4 of the fourth end 2421-2 within the second arcuate groove 2333-1 of the fifth mounting portion 2333, resulting in a simple connection method. In other embodiments, the second bracket 233 and the second moving member 242 may also be rotatably connected by a pin or other means, which is not limited in this application.

[0184] This application provides a first mounting portion 2322 of the first bracket 232 that is rotatably connected to the first end 2411-1 of the first moving member 241, and a second mounting portion 2323 of the first bracket 232 that is rotatably connected to the second end 2411-2 of the first moving member 241. That is, both ends of the first bracket 232 and both ends of the first moving member 241 are provided with rotatable connection structures and are rotatably connected, which makes the connection mechanism between the first bracket 232 and the first moving member 241 highly stable and able to rotate stably during folding or unfolding, thus ensuring the stability of the folding mechanism 23. The fourth mounting part 2332 of the second bracket 233 is rotatably connected to the third end 2421-1 of the second moving part 242, and the fifth mounting part 2333 of the second bracket 233 is rotatably connected to the fourth end 2421-2 of the second moving part 242. That is, both ends of the second bracket 233 and both ends of the second moving part 242 are provided with rotatable connection structures and are rotatably connected, which makes the connection mechanism of the second bracket 233 and the second moving part 242 highly stable and able to rotate stably during folding or unfolding, thus ensuring the stability of the folding mechanism 23.

[0185] like Figure 32 and Figure 33 As shown, Figure 32 for Figure 6 The structure shown is a cross-sectional view at DD. Figure 33 for Figure 32The diagram shows the structure in its folded state. The first arc-shaped arm 2413 of the first moving member 241 is rotatably connected to the fixing member 2312 of the main shaft 231. The first arc-shaped arm 2413 is mounted in the first mounting space 2312-8. When the folding mechanism 23 folds from the unfolded state to the closed state, the first arc-shaped arm 2413 partially rotates out of the first mounting space 2312-8. When the folding mechanism 23 unfolds from the closed state to the unfolded state, the first arc-shaped arm 2413 rotates into the first mounting space 2312-8.

[0186] In this embodiment, the first arc-shaped arm 2413 of the first moving member 241 and the fixing member 2312 of the main shaft 231 cooperate to form a virtual axis rotational connection structure. The rotational connection between the first moving member 241 and the main shaft 231 via a virtual axis reduces the design difficulty of the folding mechanism 23, lowers the size requirements of the folding mechanism 23, and is beneficial for the folding mechanism 23 and its thinness. In some other embodiments, the rotational connection between the first moving member 241 and the main shaft 231 can also be achieved via a physical axis; this application does not strictly limit this.

[0187] The second arc-shaped arm 2423 of the second moving part 242 is rotatably connected to the fixing part 2312 of the main shaft 231. The second arc-shaped arm 2423 is installed in the second mounting space 2312-9. When the folding mechanism 23 is folded from the unfolded state to the closed state, the second arc-shaped arm 2423 partially rotates out of the second mounting space 2312-9. When the folding mechanism 23 is unfolded from the closed state to the unfolded state, the second arc-shaped arm 2423 rotates into the second mounting space 2312-9.

[0188] In this embodiment, the second arcuate arm 2423 of the second moving member 242 and the fixing member 2312 of the main shaft 231 cooperate to form a virtual axis rotational connection structure. The rotational connection between the second moving member 242 and the main shaft 231 via a virtual axis reduces the design difficulty of the folding mechanism 23, lowers the size requirements of the folding mechanism 23, and is beneficial for the folding mechanism 23 and its thinness. In some other embodiments, the rotational connection between the second moving member 242 and the main shaft 231 can also be achieved via a physical axis; this embodiment does not strictly limit this.

[0189] See Figure 32 and Figure 33 The fifth assembly hole 2383 of the first door panel 238 corresponds to the second assembly hole 2413-5 of the first moving member 241, and fasteners pass through the fifth assembly hole 2383 and the second assembly hole 2413-5. The fasteners can be screws, bolts, etc. The second door panel 239 is fixed to the second moving member 242. During the unfolding or folding process of the folding mechanism 23, the first door panel 238 and the second door panel 239 can move with the first moving member 241 and the second moving member 242.

[0190] The structure and interconnections of the main shaft 231, first bracket 232, second bracket 233, first swing arm 234, second swing arm 235, first moving component 241, second moving component 242, first locking component 2431, second locking component 2432, first adapter shaft 2433, second adapter shaft 2434, multiple third adapter shafts 2435, multiple elastic components 2436, fixing element 2437, first door panel 238, and second door panel 239 in this embodiment are only folded This is one implementation of the folding mechanism 23. The folding mechanism 23 can also be implemented in other ways, as long as it uses the first synchronous gear 236 and the second synchronous gear 237 of this application. The radius R1 of the tip circle of the first tooth portion 2361 of the first synchronous gear 236 is different from the radius R2 of the tip circle of the second tooth portion 2362, and the radius R3 of the tip circle of the third tooth portion 2371 of the second synchronous gear 237 is different from the radius R4 of the tip circle of the fourth tooth portion 2372. All of these are within the scope of protection of this application. Exemplarily, in other embodiments, the folding mechanism 23 may also include a third door panel. A folding mechanism with a third door panel can also adopt the design of the first synchronous gear 236 and the second synchronous gear 237 of this application.

[0191] This application designs the first synchronous gear 236 and the second synchronous gear 237 to have different radii R1 and R2 of the tip circle of the first tooth portion 2361 of the first synchronous gear 236, and different radii R3 and R4 of the tip circle of the third tooth portion 2371 of the second synchronous gear 237. This design allows for adjustments to the dimensions of the first synchronous gear 236 and the second synchronous gear 237 according to the space of the folding mechanism 23. This makes the first synchronous gear 236 and the second synchronous gear 237 more flexible in occupying the space of the folding mechanism 23, and allows for adjustments to the dimensions of different parts as needed, which is beneficial for making full use of the internal space of the folding mechanism 23. Furthermore, in some embodiments of this application, by setting the radius R1 of the tip circle of the first tooth 2361 to be larger than the radius R2 of the tip circle of the second tooth 2362, and the radius R4 of the tip circle of the fourth tooth 2372 to be smaller than the radius R3 of the tip circle of the third tooth 2371, it is advantageous to use as few synchronous gears as possible to provide as much screen space as possible. As the electronic device 100 tends towards miniaturization, it can ensure that the first support 232 and the second support 233 of the folding mechanism 23 can be folded or opened synchronously within a limited space. The fewer the number of synchronous gears and the larger the size of the synchronous gears, the smaller the cumulative transmission error of the synchronous gears, which is beneficial to improving motion accuracy.

[0192] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions 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. An electronic device (100), characterized in that, It includes a first housing (21), a second housing (22), a folding mechanism (23), and a flexible display screen (10). The first housing (21), the second housing (22), and the folding mechanism (23) together support the flexible display screen (10). The folding mechanism (23) includes a main shaft (231), a first bracket (232), a second bracket (233), a first swing arm (234), a second swing arm (235), a first synchronous gear (236), and a second synchronous gear (237). The first swing arm (234) includes a first rotating end (2341) and a first sliding end (2342). The first rotating end (2341) is rotatably connected to the main shaft (231), and the first sliding end (2342) is slidably connected to the first bracket (232). The first housing (21) is fixedly connected to the first bracket (232). The second swing arm (235) includes a second rotating end (2351) and a second sliding end (2352). The second rotating end (2351) is rotatably connected to the main shaft (231), and the second sliding end (2352) is slidably connected to the second bracket (233). The second housing (22) is fixedly connected to the second bracket (233). The first synchronizing gear (236) and the second synchronizing gear (237) are used to make the first swing arm (234) and the second swing arm (235) move synchronously; The first synchronizing gear (236) is rotatably connected to the main shaft (231) around a first rotation center. The first synchronizing gear (236) includes a first tooth portion (2361) and a second tooth portion (2362). The first tooth portion (2361) includes multiple teeth, and the circle containing the tips of the multiple teeth of the first tooth portion (2361) is the tip circle of the first tooth portion (2361). The second tooth portion (2362) includes multiple teeth, and the circle containing the tips of the multiple teeth of the second tooth portion (2362) is... The radius of the tip circle of the second tooth (2362) is different from the radius of the tip circle of the first tooth (2361). The radius of the tip circle of the first tooth (2361) is the distance from the tip of any one of the teeth of the first tooth (2361) to the first rotation center. The radius of the tip circle of the second tooth (2362) is the distance from the tip of any one of the teeth of the second tooth (2362) to the first rotation center. The second synchronizing gear (237) is rotatably connected to the main shaft (231) around the second rotation center. The second synchronizing gear (237) includes a third tooth section (2371) and a fourth tooth section (2372). The third tooth section (2371) includes multiple teeth, and the circle containing the tips of the multiple teeth of the third tooth section (2371) is the tip circle of the third tooth section (2371). The fourth tooth section (2372) includes multiple teeth, and the circle containing the tips of the multiple teeth of the fourth tooth section (2372) is the tip circle of the fourth tooth section (2372). The radius of the tip circle of the third tooth (2371) is different from the radius of the tip circle of the fourth tooth (2372). The radius of the tip circle of the third tooth (2371) is the distance from the tip of any one of the teeth of the third tooth (2371) to the second rotation center. The radius of the tip circle of the fourth tooth (2372) is the distance from the tip of any one of the teeth of the fourth tooth (2372) to the second rotation center. The third tooth (2371) meshes with the second tooth (2362).

2. The electronic device (100) as claimed in claim 1, characterized in that, The first tooth (2361) meshes with the first rotating end (2341), and the fourth tooth (2372) meshes with the second rotating end (2351).

3. The electronic device (100) as described in claim 1 or 2, characterized in that, The main shaft (231) includes a first side (2315) and a second side (2316) disposed opposite to each other. The first side (2315) is the external side of the main shaft (231), and the second side (2316) is closer to the flexible display screen (10) than the first side (2315). The radius of the tip circle of the first tooth (2361) is greater than the radius of the tip circle of the second tooth (2362), and the radius of the tip circle of the fourth tooth (2372) is greater than the radius of the tip circle of the third tooth (2371). During the process of folding the folding mechanism (23) from the open state to the closed state, the first tooth (2361) moves closer to the first side (2315), the fourth tooth (2372) moves closer to the first side (2315), the second tooth (2362) moves closer to the second side (2316), and the third tooth (2371) moves closer to the second side (2316).

4. The electronic device (100) as claimed in claim 3, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239). The first door panel (238) and the second door panel (239) are located on the second side (2316). When the folding mechanism (23) is in the open state, the first door panel (238) is located between the second tooth (2362) and the flexible display screen (10), and the second door panel (239) is located between the third tooth (2371) and the flexible display screen (10). When the folding mechanism (23) is in the closed state, the first door panel (238) is not located between the second tooth (2362) and the flexible display screen (10), and the second door panel (239) is not located between the third tooth (2371) and the flexible display screen (10).

5. The electronic device (100) as claimed in claim 2, characterized in that, The first rotating end (2341) is rotatably connected to the main shaft (231) about a third rotation center, and the second rotating end (2351) is rotatably connected to the main shaft (231) about a fourth rotation center. The first rotating end (2341) includes a fifth tooth (2344), which includes multiple teeth, and the circle containing the tips of the multiple teeth of the fifth tooth (2344) is the tip circle of the fifth tooth (2344). The second rotating end (2351) includes a sixth tooth (2354), which includes multiple teeth, and the circle containing the tips of the multiple teeth of the sixth tooth (2354) is the tip circle of the fifth tooth (2344). The circle is the tip circle of the sixth tooth (2354), the radius of the tip circle of the first tooth (2361) is greater than the radius of the tip circle of the fifth tooth (2344), the radius of the tip circle of the fourth tooth (2372) is greater than the radius of the tip circle of the sixth tooth (2354), the radius of the tip circle of the fifth tooth (2344) is the distance from the tip of any one of the teeth of the fifth tooth (2344) to the third rotation center, and the radius of the tip circle of the sixth tooth (2354) is the distance from the tip of any one of the teeth of the sixth tooth (2354) to the fourth rotation center.

6. The electronic device (100) as described in any one of claims 3-5, characterized in that, The distance between the rotation center of the first rotating end (2341) and the first rotation center is the first distance (L1), and the distance between the first rotation center and the second rotation center is the second distance (L2). The first distance (L1) is greater than the second distance (L2).

7. The electronic device (100) as described in any one of claims 3-6, characterized in that, The first synchronous gear (236) includes a first toothless portion (2365) and a second toothless portion (2366). The first toothed portion (2361) and the second toothed portion (2362) are spaced apart. The first toothless portion (2365) and the second toothless portion (2366) are both located between the first toothed portion (2361) and the second toothed portion (2362) and are spaced apart relative to each other. The first toothless portion (2365) is closer to the first side (2315) than the second toothless portion (2366), and the second toothless portion (2366) is closer to the second side (2316) than the first toothless portion (2365). The curvature of the first toothless portion (2365) is greater than the curvature of the second toothless portion (2366).

8. The electronic device (100) as claimed in any one of claims 3-6, characterized in that, The first synchronizing gear (236) includes a first toothless portion (2365) and a second toothless portion (2366). The first toothed portion (2361) and the second toothed portion (2362) are spaced apart. The first toothless portion (2365) and the second toothless portion (2366) are both located between the first toothed portion (2361) and the second toothed portion (2362) and are spaced apart from each other. The first toothless portion (2365) is closer to the first side (2315) than the second toothless portion (2366), and the second toothless portion (2366) is closer to the second side (2316) than the first toothless portion (2365). The tooth connecting the first toothed portion (2361) and the first toothless portion (2365) is the first tooth (2361-1), the tooth connecting the second toothed portion (2362) and the first toothless portion (2365) is the second tooth (2362-1), the tooth connecting the first toothed portion (2361) and the second toothless portion (2366) is the third tooth (2361-2), and the tooth connecting the second toothed portion (2362) and the second toothless portion (2366) is the fourth tooth (2362-2). The distance between the tip of the first tooth (2361-1) and the tip of the second tooth (2362-1) is greater than the distance between the tip of the third tooth (2361-2) and the tip of the fourth tooth (2362-2).

9. The electronic device (100) according to any one of claims 3-8, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239). The first door panel (238) and the second door panel (239) are located on the second side (2316). When the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239). When the folding mechanism (23) is in the closed state, the first support surface (2381) of the first door panel (238) and the second support surface (2391) of the second door panel (239) are opposite to each other and are far apart from each other in the direction close to the main shaft (231). When the folding mechanism (23) is in the closed state, the rotation center of the first rotating end (2341) is located on the side of the plane where the first door panel (238) is located away from the flexible display screen (10), and the rotation center of the second rotating end (2351) is located on the side of the plane where the second door panel (239) is located away from the flexible display screen (10).

10. The electronic device (100) according to any one of claims 3-9, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239). The first door panel (238) and the second door panel (239) are located on the second side (2316). When the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239). When the folding mechanism (23) is in the closed state, the first support surface (2381) of the first door panel (238) and the second support surface (2391) of the second door panel (239) are opposite to each other and are far apart from each other in the direction close to the main shaft (231). When the folding mechanism (23) is in the open state, the vertical projection of the first synchronous gear (236) on the plane where the first door panel (238) is located overlaps at least partially with the first door panel (238), and the vertical projection of the second synchronous gear (237) on the plane where the second door panel (239) is located overlaps at least partially with the second door panel (239).

11. The electronic device (100) according to any one of claims 3-8, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239), the first door panel (238) and the second door panel (239) are located on the second side (2316), and when the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239); When the folding mechanism (23) is in the closed state, the rotation center of the first rotating end (2341) is located on the side of the plane where the first door panel (238) is located away from the flexible display screen (10), and the rotation center of the second rotating end (2351) is located on the side of the plane where the second door panel (239) is located away from the flexible display screen (10).

12. The electronic device (100) according to any one of claims 3-9, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239), the first door panel (238) and the second door panel (239) are located on the second side (2316), and when the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239); When the folding mechanism (23) is in the open state, the vertical projection of the first synchronous gear (236) on the plane where the first door panel (238) is located overlaps at least partially with the first door panel (238), and the vertical projection of the second synchronous gear (237) on the plane where the second door panel (239) is located overlaps at least partially with the second door panel (239).

13. The electronic device (100) according to any one of claims 3-12, characterized in that, The main shaft (231) includes an outer cover plate (2311), the first side (2315) is the outer side of the outer cover plate (2311), the folding mechanism (23) includes a first locking member (2431), a second locking member (2432), a fixing element (2437) and an elastic member (2436), the second locking member (2432) is located between the first locking member (2431) and the fixing element (2437), the first synchronous gear (236) and the second synchronous gear (237) are located between the first locking member (2431) and the second locking member (2432), the elastic member (2436) is located between the second locking member (2432) and the fixing element (2437), and the first locking member (2431) and the fixing element (2437) are both fixed to the outer cover plate (2311).

14. The electronic device (100) as claimed in claim 13, characterized in that, The surface of the first locking member (2431) facing the second locking member (2432) is a smooth surface; the end of the second locking member (2432) facing the first locking member (2431) is provided with a plurality of spaced-apart protrusion groups (2432-2), each of the protrusion groups (2432-2) including a plurality of protrusions (2432-4), the plurality of protrusions (2432-4) are arranged in a ring and spaced apart, and a first locking groove (2432-5) is formed between adjacent protrusions (2432-4). The gear (236) has a plurality of first protrusions (2364) at one end facing the second locking member (2432), and the second synchronous gear (237) has a plurality of second protrusions (2374) on one side facing the second locking member (2432). The plurality of first protrusions (2364) engage with the first locking groove (2432-5) of one of the protrusion groups (2432-2), and the plurality of second protrusions (2374) engage with the first locking groove (2432-5) of another protrusion group (2432-2).

15. The electronic device (100) as claimed in claim 13, characterized in that, The first locking member (2431) includes a body (2431-3) and a protrusion (2431-4). The protrusion (2431-4) is located on the side of the body (2431-3) facing the second locking member (2432). The side of the first rotating end (2341) facing the first locking member (2431) includes a first abutting part (2341-1) and a second abutting part (2341-2). The second abutting part (2341-2) protrudes from the first abutting part (2341-1). The second abutting part (2341-2) abuts against the body (2431-3). A portion of the first abutting part (2341-1) abuts against the protrusion (2431-4), and a gap (244) exists between the other portion of the first abutting part (2341-1) and the body (2431-3).

16. The electronic device (100) as claimed in claim 1 or 2, characterized in that, The folding mechanism (23) includes a first moving part (241), which is rotatably connected to the first bracket (232) and the main shaft (231).

17. The electronic device (100) as claimed in claim 16, characterized in that, The first moving part (241) is slidably connected to the first bracket (232).

18. The electronic device (100) as claimed in claim 1 or 2, characterized in that, The folding mechanism (23) includes a first moving part (241), which is slidably connected to the first bracket (232) and rotatably connected to the main shaft (231).

19. The electronic device (100) as claimed in claim 17, characterized in that, One end of the first moving part (241) is provided with a third arc-shaped groove (2411-3) and a first hole (2411-6) spaced apart. One end of the first bracket (232) is provided with a first arc-shaped strip (2322-2) and a first shaft (2322-3). The first arc-shaped strip (2322-2) cooperates with the third arc-shaped groove (2411-3) and can move within the arc-shaped groove (2411-3). The first shaft (2322-3) passes through the first hole (2411-6) and can slide within the first hole (2411-6).

20. A folding mechanism (23), characterized in that, It includes a main shaft (231), a first bracket (232), a second bracket (233), a first swing arm (234), a second swing arm (235), a first synchronous gear (236), and a second synchronous gear (237); The first swing arm (234) includes a first rotating end (2341) and a first sliding end (2342). The first rotating end (2341) is rotatably connected to the main shaft (231), and the first sliding end (2342) is slidably connected to the first bracket (232). The second swing arm (235) includes a second rotating end (2351) and a second sliding end (2352). The second rotating end (2351) is rotatably connected to the main shaft (231), and the second sliding end (2352) is slidably connected to the second bracket (233). The first synchronizing gear (236) and the second synchronizing gear (237) are used to make the first swing arm (234) and the second swing arm (235) move synchronously; The first synchronizing gear (236) is rotatably connected to the main shaft (231) around a first rotation center. The first synchronizing gear (236) includes a first tooth portion (2361) and a second tooth portion (2362). The first tooth portion (2361) includes multiple teeth, and the circle containing the tips of the multiple teeth of the first tooth portion (2361) is the tip circle of the first tooth portion (2361). The second tooth portion (2362) includes multiple teeth, and the circle containing the tips of the multiple teeth of the second tooth portion (2362) is... The radius of the tip circle of the second tooth (2362) is different from the radius of the tip circle of the first tooth (2361). The radius of the tip circle of the first tooth (2361) is the distance from the tip of any one of the teeth of the first tooth (2361) to the first rotation center. The radius of the tip circle of the second tooth (2362) is the distance from the tip of any one of the teeth of the second tooth (2362) to the first rotation center. The second synchronizing gear (237) is rotatably connected to the main shaft (231) around the second rotation center. The second synchronizing gear (237) includes a third tooth section (2371) and a fourth tooth section (2372). The third tooth section (2371) includes multiple teeth, and the circle containing the tips of the multiple teeth of the third tooth section (2371) is the tip circle of the third tooth section (2371). The fourth tooth section (2372) includes multiple teeth, and the circle containing the tips of the multiple teeth of the fourth tooth section (2372) is the tip circle of the fourth tooth section (2372). The radius of the tip circle of the third tooth (2371) is different from the radius of the tip circle of the fourth tooth (2372). The radius of the tip circle of the third tooth (2371) is the distance from the tip of any one of the teeth of the third tooth (2371) to the second rotation center. The radius of the tip circle of the fourth tooth (2372) is the distance from the tip of any one of the teeth of the fourth tooth (2372) to the second rotation center. The third tooth (2371) meshes with the second tooth (2362).

21. The folding mechanism (23) as described in claim 20, characterized in that, The first tooth (2361) meshes with the first rotating end (2341), and the fourth tooth (2372) meshes with the second rotating end (2351).

22. The folding mechanism (23) as described in claim 20 or 21, characterized in that, The spindle (231) includes a first side (2315) and a second side (2316) arranged opposite to each other. The first side (2315) is the external side of the spindle (231). The radius of the tip circle of the first tooth (2361) is greater than the radius of the tip circle of the second tooth (2362), and the radius of the tip circle of the fourth tooth (2372) is greater than the radius of the tip circle of the third tooth (2371). During the process of folding the folding mechanism (23) from the open state to the closed state, the first tooth (2361) moves closer to the first side (2315), the fourth tooth (2372) moves closer to the first side (2315), the second tooth (2362) moves closer to the second side (2316), and the third tooth (2371) moves closer to the second side (2316).

23. The folding mechanism (23) as described in claim 22, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239). The first door panel (238) and the second door panel (239) are located on the second side (2316). When the folding mechanism (23) is in the open state, along the direction from the first side (2315) to the second side (2316), the projection of the first door panel (238) at least partially overlaps with the projection of the second tooth (2362), and the projection of the second door panel (239) at least partially overlaps with the projection of the third tooth (2371). When the folding mechanism (23) is in the closed state, along the direction from the first side (2315) to the second side (2316), the projections of the first door panel (238) and the second tooth (2362) do not overlap, and the projections of the second door panel (239) and the third tooth (2371) do not overlap.

24. The folding mechanism (23) as described in claim 23, characterized in that, The first rotating end (2341) is rotatably connected to the main shaft (231) about a third rotation center, and the second rotating end (2351) is rotatably connected to the main shaft (231) about a fourth rotation center. The first rotating end (2341) includes a fifth tooth (2344), which includes multiple teeth, and the circle containing the tips of the multiple teeth of the fifth tooth (2344) is the tip circle of the fifth tooth (2344). The second rotating end (2351) includes a sixth tooth (2354), which includes multiple teeth, and the circle containing the tips of the multiple teeth of the sixth tooth (2354) is the tip circle of the fifth tooth (2344). The circle is the tip circle of the sixth tooth (2354), the radius of the tip circle of the first tooth (2361) is greater than the radius of the tip circle of the fifth tooth (2344), the radius of the tip circle of the fourth tooth (2372) is greater than the radius of the tip circle of the sixth tooth (2354), the radius of the tip circle of the fifth tooth (2344) is the distance from the tip of any one of the teeth of the fifth tooth (2344) to the third rotation center, and the radius of the tip circle of the sixth tooth (2354) is the distance from the tip of any one of the teeth of the sixth tooth (2354) to the fourth rotation center.

25. The folding mechanism (23) as described in any one of claims 22-24, characterized in that, The distance between the rotation center of the first rotating end (2341) and the first rotation center is the first distance (L1), and the distance between the rotation center of the first synchronous gear (236) and the second rotation center is the second distance (L2). The first distance (L1) is greater than the second distance (L2).

26. The folding mechanism (23) as described in any one of claims 22-25, characterized in that, The first synchronous gear (236) includes a first toothless portion (2365) and a second toothless portion (2366). The first toothed portion (2361) and the second toothed portion (2362) are spaced apart. The first toothless portion (2365) and the second toothless portion (2366) are both located between the first toothed portion (2361) and the second toothed portion (2362) and are spaced apart relative to each other. The first toothless portion (2365) is closer to the first side (2315) than the second toothless portion (2366), and the second toothless portion (2366) is closer to the second side (2316) than the first toothless portion (2365). The curvature of the first toothless portion (2365) is greater than the curvature of the second toothless portion (2366).

27. The folding mechanism (23) as described in any one of claims 22-26, characterized in that, The first synchronizing gear (236) includes a first toothless portion (2365) and a second toothless portion (2366). The first toothed portion (2361) and the second toothed portion (2362) are spaced apart. The first toothless portion (2365) and the second toothless portion (2366) are both located between the first toothed portion (2361) and the second toothed portion (2362) and are spaced apart from each other. The first toothless portion (2365) is closer to the first side (2315) than the second toothless portion (2366), and the second toothless portion (2366) is closer to the second side (2316) than the first toothless portion (2365). The tooth connecting the first toothed portion (2361) and the first toothless portion (2365) is the first tooth (2361-1), the tooth connecting the second toothed portion (2362) and the first toothless portion (2365) is the second tooth (2362-1), the tooth connecting the first toothed portion (2361) and the second toothless portion (2366) is the third tooth (2361-2), and the tooth connecting the second toothed portion (2362) and the second toothless portion (2366) is the fourth tooth (2362-2). The distance between the tip of the first tooth (2361-1) and the tip of the second tooth (2362-1) is greater than the distance between the tip of the third tooth (2361-2) and the tip of the fourth tooth (2362-2).

28. The folding mechanism (23) as described in any one of claims 22-27, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239). The first door panel (238) and the second door panel (239) are located on the second side (2316). When the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239). When the folding mechanism (23) is in the closed state, the first support surface (2381) of the first door panel (238) and the second support surface (2391) of the second door panel (239) are opposite to each other and are far apart from each other in the direction close to the main shaft (231). When the folding mechanism (23) is in the closed state, the rotation center of the first rotating end (2341) is located on the side of the plane where the first door panel (238) is located away from the first support surface (2381), and the rotation center of the second rotating end (2351) is located on the side of the plane where the second door panel (239) is located away from the second support surface (2391).

29. The folding mechanism (23) as described in any one of claims 22-28, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239). The first door panel (238) and the second door panel (239) are located on the second side (2316). When the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239). When the folding mechanism (23) is in the closed state, the first support surface (2381) of the first door panel (238) and the second support surface (2391) of the second door panel (239) are opposite to each other and are far apart from each other in the direction close to the main shaft (231). When the folding mechanism (23) is in the open state, the vertical projection of the first synchronous gear (236) on the plane where the first door panel (238) is located overlaps at least partially with the first door panel (238), and the vertical projection of the second synchronous gear (237) on the plane where the second door panel (239) is located overlaps at least partially with the second door panel (239).

30. The folding mechanism (23) as described in any one of claims 22-27, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239), the first door panel (238) and the second door panel (239) are located on the second side (2316), and when the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239); When the folding mechanism (23) is in the closed state, the rotation center of the first rotating end (2341) is located on the side of the plane where the first door panel (238) is located away from the first support surface (2381), and the rotation center of the second rotating end (2351) is located on the side of the plane where the second door panel (239) is located away from the second support surface (2391).

31. The folding mechanism (23) as described in any one of claims 22-28, characterized in that, The folding mechanism (23) includes a first door panel (238) and a second door panel (239), the first door panel (238) and the second door panel (239) are located on the second side (2316), and when the folding mechanism (23) is in the open state, the first support surface (2381) of the first door panel (238) is flush with the second support surface (2391) of the second door panel (239); When the folding mechanism (23) is in the open state, the vertical projection of the first synchronous gear (236) on the plane where the first door panel (238) is located overlaps at least partially with the first door panel (238), and the vertical projection of the second synchronous gear (237) on the plane where the second door panel (239) is located overlaps at least partially with the second door panel (239).

32. The folding mechanism (23) as described in any one of claims 22-31, characterized in that, The main shaft (231) includes an outer cover plate (2311), the first side (2315) is the outer side of the outer cover plate (2311), the folding mechanism (23) includes a first locking member (2431), a second locking member (2432), a fixing element (2437) and an elastic member (2436), the second locking member (2432) is located between the first locking member (2431) and the fixing element (2437), the first synchronous gear (236) and the second synchronous gear (237) are located between the first locking member (2431) and the second locking member (2432), the elastic member (2436) is located between the second locking member (2432) and the fixing element (2437), and the first locking member (2431) and the fixing element (2437) are both fixed to the outer cover plate (2311).

33. The folding mechanism (23) as described in claim 32, characterized in that, The surface of the first locking member (2431) facing the second locking member (2432) is a smooth surface; the end of the second locking member (2432) facing the first locking member (2431) is provided with a plurality of spaced-apart protrusion groups (2432-2), each of the protrusion groups (2432-2) including a plurality of protrusions (2432-4), the plurality of protrusions (2432-4) are arranged in a ring and spaced apart, and a first locking groove (2432-5) is formed between adjacent protrusions (2432-4). The gear (236) has a plurality of first protrusions (2364) at one end facing the second locking member (2432), and the second synchronous gear (237) has a plurality of second protrusions (2374) on one side facing the second locking member (2432). The plurality of first protrusions (2364) engage with the first locking groove (2432-5) of one of the protrusion groups (2432-2), and the plurality of second protrusions (2374) engage with the first locking groove (2432-5) of another protrusion group (2432-2).

34. The folding mechanism (23) as described in claim 32, characterized in that, The first locking member (2431) includes a body (2431-3) and a protrusion (2431-4). The protrusion (2431-4) is located on the side of the body (2431-3) facing the second locking member (2432). The first rotating end (2341) includes a fifth tooth. The side of the fifth tooth facing the first locking member (2431) includes a first abutting part (2341-1) and a second abutting part (2341-2). The second abutting part (2341-2) protrudes from the first abutting part (2341-1) and abuts against the body (2431-3). A portion of the first abutting part (2341-1) abuts against the protrusion (2431-4), and a gap (244) exists between the other portion of the first abutting part (2341-1) and the body (2431-3).

35. The folding mechanism (23) as described in claim 20 or 21, characterized in that, The folding mechanism (23) includes a first moving part (241), which is rotatably connected to the first bracket (232) and the main shaft (231).

36. The folding mechanism (23) as described in claim 35, characterized in that, The first moving part (241) is slidably connected to the first bracket (232).

37. The folding mechanism (23) as described in claim 20 or 21, characterized in that, The folding mechanism (23) includes a first moving part (241), which is slidably connected to the first bracket (232) and rotatably connected to the main shaft (231).

38. The folding mechanism (23) as described in claim 36, characterized in that, One end of the first moving part (241) is provided with a third arc-shaped groove (2411-3) and a first hole (2411-6) spaced apart. One end of the first bracket (232) is provided with a first arc-shaped strip (2322-2) and a first shaft (2322-3). The first arc-shaped strip (2322-2) cooperates with the third arc-shaped groove (2411-3) and can move within the arc-shaped groove (2411-3). The first shaft (2322-3) passes through the first hole (2411-6) and can slide within the first hole (2411-6).

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