Folding mechanism and electronic device

Abstract

The present application provides a folding mechanism and an electronic device. The folding mechanism comprises a main shaft, a first fixing frame, a second fixing frame, a first connecting arm, a second connecting arm, and a first pin; the first connecting arm comprises a first connecting end and a second connecting end, the first connecting end is connected to the main shaft, the second connecting end is connected to the first fixing frame, and the first connecting end is provided with a first slot; the second connecting arm comprises a third connecting end and a fourth connecting end, the third connecting end is connected to the main shaft, and the fourth connecting end is connected to the second fixing frame; the first pin is located on the main shaft and movably connected to the main shaft, and the first pin can be inserted into the first slot when the folding mechanism is in a flattened state. In this way, the first connecting arm can no longer rotate relative to the main shaft. The first fixing frame can also no longer rotate relative to the main shaft. The main shaft, the first fixing frame and the second fixing frame can be maintained at a certain angle, such as 180°, so that the main shaft, the first fixing frame and the second fixing frame are less likely to experience flattening hump issues.

Description

Folding mechanism and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 16, 2023, with application number 202311547808.7, and priority to the Chinese patent application with the invention name “Folding mechanism and electronic device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of foldable electronic devices, and in particular to a folding mechanism and electronic devices. Background Art

[0003] With the development of science and technology and the demand of the electronic equipment market, the application of foldable electronic devices is becoming more and more extensive, and users have higher and higher requirements for the overall refinement of foldable electronic devices. Traditional foldable electronic devices include a first shell, a second shell and a folding mechanism. The traditional folding mechanism includes a connecting arm and a damping member. When the electronic device is in a flattened state, the damping member is supported on the connecting arm to keep the first shell and the second shell at a certain angle, such as 180°. However, after the electronic device is folded a large number of times, the damping force decreases due to wear of the components of the folding mechanism and spring attenuation of the damping member. The first shell and the second shell will rotate relative to the folding mechanism due to the rewinding force of the flexible screen, causing the electronic device to appear flattened and hunched (or not flattened), affecting the overall refinement of the electronic device.

[0004] Summary of the Invention

[0005] The purpose of this application is to provide a folding mechanism and electronic equipment that can be flattened and locked.

[0006] In a first aspect, the present application provides a folding mechanism. The folding mechanism includes a main shaft, a first fixed frame, a second fixed frame, a first connecting arm, a second connecting arm, and a first latch. The main shaft is located between the first fixed frame and the second fixed frame. The first connecting arm includes a first connecting end and a second connecting end, the first connecting end being connected to the main shaft, the second connecting end being connected to the first fixed frame, and the first connecting end being provided with a first slot. The second connecting arm includes a third connecting end and a fourth connecting end, the third connecting end being connected to the main shaft, and the fourth connecting end being connected to the second fixed frame. The first latch is located on the main shaft and movably connected to the main shaft. The first latch is configured to be inserted into the first slot when the folding mechanism is in a flattened state.

[0007] It is understood that by providing a first latch within the main shaft, when the folding mechanism is in the flattened state, at least a portion of the first plug portion of the first latch can be inserted into the first slot of the first connecting arm. This prevents the first connecting arm from rotating relative to the main shaft. The first fixing bracket also prevents rotation relative to the main shaft. In this manner, the main shaft, first fixing bracket, and second fixing bracket can be maintained at a certain angle, such as 180°, making the main shaft, first fixing bracket, and second fixing bracket less likely to hunch over when flattened.

[0008] Furthermore, when the folding mechanism is in the flattened state, the first connecting arm is locked from rotating by inserting the first latch into the first slot. The present application provides a folding mechanism that can be stably flattened and locked, thereby improving the stability of the folding mechanism in the flattened state.

[0009] In one possible implementation, the third connection end is provided with a second slot; the folding mechanism includes a second pin, the second pin is located on the main shaft and is spaced apart from the first pin, the second pin is movably connected to the main shaft, and the second pin is used to be able to be inserted into the second slot when the folding mechanism is in a flattened state.

[0010] It is understood that by providing a second latch within the main shaft, when the folding mechanism is in the flattened state, at least a portion of the second plug portion of the second latch can be inserted into the second slot of the second connecting arm. This prevents the second connecting arm from rotating relative to the main shaft. The second fixing bracket also prevents rotation relative to the main shaft. This allows the main shaft, first fixing bracket, and second fixing bracket to be better maintained at a predetermined angle, such as 180°. This makes the main shaft, first fixing bracket, and second fixing bracket less susceptible to hunching when flattened.

[0011] Furthermore, when the folding mechanism is in the flattened state, the second connecting arm is locked from rotating by inserting the second latch into the second slot. The present application provides a folding mechanism that can be stably flattened and locked, thereby improving the stability of the folding mechanism in the flattened state.

[0012] In one possible implementation, the first latch has a first meshing portion, and the second latch has a second meshing portion; the folding mechanism includes a synchronous gear, which is located on the main shaft and rotatably connected to the main shaft, and the second meshing portion meshes with the first meshing portion through the synchronous gear.

[0013] It is understood that by providing a synchronization gear between the first and second latch pins, the synchronization gear can simultaneously drive the movement of the second latch pin while driving the first latch pin. Thus, this embodiment can achieve synchronized movement of the first and second latch pins using a single driving force. The first and second latch pins are inserted into the first and second connecting arms, respectively. The folding mechanism of this embodiment is relatively simple in structure, reducing assembly difficulty and manufacturing costs.

[0014] In a possible implementation, the first latch has a first limiting portion, the second latch has a second limiting portion, a portion of the synchronous gear is located between the first limiting portion and the main shaft, and a portion of the synchronous gear is located between the second limiting portion and the main shaft.

[0015] It can be understood that the main shaft, the first stopper of the first latch, and the second stopper of the second latch cooperate to limit the position of the synchronizing gear in the thickness direction of the main shaft. Thus, the first and second latches not only lock the first and second connecting arms, respectively, when the folding mechanism is in the flattened state, but also cooperate with the main shaft to limit the position of the synchronizing gear in the thickness direction of the main shaft. The first and second latches achieve a "one-item, multi-purpose" effect.

[0016] In one possible implementation, the first connecting end and the third connecting end are arranged along a first direction, the first latch and the second latch are located between the first and third connecting ends, and the first latch and the second latch are arranged along a second direction, where the first direction is the longitudinal extension direction of the main axis, and the second direction intersects the first direction. In this way, the first connecting end of the first connecting arm, the third connecting end of the second connecting arm, and the first latch and the second latch are arranged more compactly on the main axis, achieving high space utilization.

[0017] In one possible implementation, the spindle includes a base and a cover, the cover being fixed to the base. Portions of the base and cover enclose a storage space; the first latch, the second latch, and the synchronization gear are all located within the storage space. This ensures that the base and cover protect the first latch, the second latch, and the synchronization gear, preventing them from interfering with external components of the spindle. Furthermore, the first latch, the second latch, the synchronization gear, and the spindle are arranged compactly, resulting in efficient space utilization.

[0018] In one possible implementation, the upper cover is provided with a first avoidance hole that passes through the upper cover and communicates with the receiving space. The first latch has a push portion, a portion of which passes through the first avoidance hole from the receiving space and extends outside the main shaft. This facilitates the user to move the push portion of the first latch relative to the main shaft.

[0019] In one possible implementation, the folding mechanism also includes a first shielding plate and a second shielding plate, the first shielding plate is fixedly connected to the second connecting end, and the second shielding plate is fixedly connected to the fourth connecting end; when the folding mechanism is in a flattened state, the first shielding plate and the second shielding plate are located on the same side of the first fixing frame, the main shaft and the second fixing frame, and the first shielding plate and the second shielding plate jointly cover the first fixing frame, the main shaft and the second fixing frame; the second shielding plate is provided with a second avoidance hole, and the second avoidance hole is arranged opposite to the first avoidance hole of the upper cover, and the pushing part passes through the second avoidance hole of the second shielding plate and extends to the side of the second shielding plate away from the main shaft.

[0020] It is understood that when the electronic device is in the flattened state, the first shielding plate is used to shield the gap between the first housing and the main shaft, and the second shielding plate is used to shield the gap between the second housing and the main shaft. Therefore, when the folding mechanism is in the flattened state, the first shielding plate and the second shielding plate can jointly shield the gap between the first and second housings, thereby achieving self-shielding. This helps improve the integrity of the appearance and reduces the risk of external dust and debris entering the internal folding mechanism, thereby ensuring the reliability of the electronic device.

[0021] In addition, by passing the pushing portion through the second avoidance hole of the second shielding plate and extending it to the side of the second shielding plate away from the main shaft, the user can easily move the pushing portion of the first latch to move the first latch relative to the main shaft.

[0022] In one possible implementation, the folding mechanism also includes a spring sheet, which includes a first straight portion, a bent portion and a second straight portion. The first straight portion and the second straight portion are both fixed to a side of the upper cover facing the accommodating space, and the bent portion protrudes in a direction close to the second latch; the second latch has a convex portion; when the first latch is inserted into the first slot, the convex portion of the second latch is located on a side of the bent portion of the spring sheet close to the third connection end; when the first latch is separated from the first slot, the convex portion of the second latch is located on a side of the bent portion of the spring sheet away from the third connection end.

[0023] It is understood that when the first latch is inserted into the first slot, the protrusion of the second latch can be located on the side of the bent portion of the spring sheet near the third connection end of the second connecting arm. The bent portion of the spring sheet can be used to block the second latch from moving in a direction away from the second connecting arm, thereby limiting the second plug-in portion of the second latch from dislodging from the second slot, ensuring that the second connecting arm no longer rotates relative to the main shaft, and improving the reliability of the connection between the second latch and the second connecting arm. Because the bent portion of the spring sheet can be used to block the second latch from moving in a direction away from the second connecting arm, the second latch will not drive the synchronous gear to rotate. The synchronous gear will not drive the first latch to move in a direction away from the first connecting arm, thereby limiting the first plug-in portion of the first latch from dislodging from the first slot, thereby ensuring that the first connecting arm no longer rotates relative to the main shaft, and improving the reliability of the connection between the first latch and the first connecting arm.

[0024] It is understood that when the first latch is separated from the first slot, the bent portion of the spring can be used to block the second latch from moving in a direction approaching the second connecting arm. This prevents the second connecting arm from being unable to rotate due to the second plug-in portion of the second latch being inserted into the second slot during the second connecting arm's rotation, thereby ensuring that the second connecting arm can rotate relative to the main shaft. Because the bent portion of the spring can block the second latch from moving in a direction approaching the second connecting arm, the second latch will not drive the synchronous gear to rotate. The synchronous gear will not drive the first latch to move in a direction approaching the first connecting arm. This prevents the first connecting arm from being unable to rotate due to the plug-in portion of the first latch being inserted into the first slot during the first connecting arm's rotation, thereby ensuring that the first connecting arm can rotate relative to the main shaft.

[0025] In a possible implementation, the main shaft is provided with a receiving groove, and at least a portion of the spring is located in the receiving groove. It is understandable that in the thickness direction of the main shaft, the spring and the upper cover have an overlapping area, which can improve space utilization.

[0026] In one possible implementation, the base has a rotating shaft located within the accommodating space, and the synchronous gear is sleeved on the rotating shaft and rotatably connected to the rotating shaft. It will be appreciated that, on the one hand, the rotating shaft can provide structural support for the synchronous gear's rotation. On the other hand, by making the rotating shaft part of the base, the structure of the folding mechanism can be simplified.

[0027] In one possible implementation, the base is provided with a first groove, the bottom wall of the first groove is an arc-shaped surface, the bottom surface of the upper cover includes the first arc-shaped surface, the first groove and the first arc-shaped surface form a first arc-shaped groove; the first connecting end is arc-shaped, and the first connecting end is located in the first arc-shaped groove.

[0028] It can be understood that the first connecting end of the first connecting arm is connected to the main shaft through a virtual axis. The structure of the rotational connection is relatively simple and occupies little space, which is conducive to reducing the thickness of the folding mechanism, making it easier for the folding mechanism and electronic equipment to achieve a lightweight setting.

[0029] In a possible implementation, a first avoidance groove is provided on the bottom wall of the first groove; when the folding mechanism is in a flattened state, the first avoidance groove is arranged opposite to the first slot, and a portion of the first latch can be inserted into the first avoidance groove.

[0030] It is understood that, by providing a first relief groove within the first arcuate groove, the present application allows a portion of the first plug-in portion of the first latch pin to be inserted into the first relief groove when the electronic device is flattened. The first relief groove can be used to prevent the first latch pin from interfering with the bottom wall of the first arcuate groove. Furthermore, the first relief groove can also, to a certain extent, limit the first latch pin in the width direction of the main shaft, thereby improving the stability of the first latch pin.

[0031] In one possible implementation, the second connecting end is slidably connected to the first fixing frame; the folding mechanism includes a first bracket and a first elastic member, the first bracket is located on the first fixing frame and is slidably connected to the first fixing frame, and the first bracket is abutted against the second connecting end; the first elastic member is located on the first fixing frame, and one end of the first elastic member abuts against the first bracket, and the other end abuts against the first fixing frame, and the first elastic member is used to apply a damping force to the second connecting end through the first bracket.

[0032] It is understood that by providing the first bracket and the first elastic member on the first bracket, the first elastic member can apply a damping force to the second connecting end through the first bracket, thereby making it more difficult for the first connecting arm to rotate relative to the main axis in the absence of external force, that is, the first connecting arm can be further locked. When the electronic device is folded or unfolded a large number of times, the damping force of the first elastic member will decrease, and the ability to resist and limit the first connecting arm will be weakened. In addition, when the folding mechanism is applied to the electronic device, the flexible screen will have a large retraction force after the electronic device is left in the folded state for a long time. In this way, when the electronic device is in the flattened state, due to the retraction force of the flexible screen, the flexible screen will overcome the smaller elastic force of the first elastic member to drive the first shell and the second shell closer to each other. The first shell can drive the first fixing frame to rotate relative to the main axis via the first connecting arm, and the second shell can drive the second fixing frame to rotate relative to the main axis via the second connecting arm. At this time, when the electronic device is in the flattened state, the first shell and the second shell cannot maintain the preset relative position relationship (for example, the first shell and the second shell are maintained at 180 degrees), that is, the electronic device will experience a flattening hunchback (unflattened) phenomenon. For example, there will be a relatively obvious angle between the first shell and the second shell, which may be 150°, 155° or 160°, etc. At this time, by arranging the first pin, the second pin and the synchronization gear in the main shaft, when the electronic device is in a flattened state, the first pin can be inserted into the first slot of the first connecting arm, and the second pin can be inserted into the second slot of the second connecting arm. At this time, even if the flexible screen applies a force to the first shell and the second shell to move closer to each other, the first connecting arm and the second connecting arm no longer rotate relative to the main shaft, the first fixing frame and the second fixing frame no longer rotate relative to the main shaft, and the first shell and the second shell no longer rotate relative to the main shaft. At this time, the first shell and the second shell can be maintained in a preset relative position (for example, the first shell and the second shell are maintained at 180°). When the electronic device is in a flattened state, the electronic device is more beautiful.

[0033] It is understandable that if the folding mechanism includes a first bracket and a first elastic member, the user can choose whether to insert the first pin into the first slot when the electronic device is in a flat state. For example, when the electronic device is folded or flattened a few times, since the damping force of the first elastic member is normal, the first elastic member can normally apply the damping force to the second connecting end through the first bracket. At this time, the first bracket and the first elastic member can lock the rotation of the first connecting arm, and the user does not need to insert the first pin into the first slot when the electronic device is in a flat state. When the electronic device is folded or flattened a lot of times, since the damping force of the first elastic member fails, the first elastic member cannot normally apply the damping force to the second connecting end through the first bracket. At this time, the first bracket and the first elastic member cannot lock the rotation of the first connecting arm, and the user can insert the first pin into the first slot when the electronic device is in a flat state.

[0034] In one possible implementation, the first bracket includes a first supporting block and a plurality of fixed columns, the plurality of first fixed columns are fixed at intervals on one side of the first supporting block, and the first supporting block is supported by the second connecting end; the first elastic member includes a plurality of springs, and the plurality of springs are correspondingly mounted on the plurality of first fixed columns.

[0035] In a second aspect, the present application provides an electronic device. The electronic device includes a first housing, a second housing, a flexible screen, and a folding mechanism according to any one of claims 1 to 3, wherein a first fixing frame is fixedly connected to the first housing, and a second fixing frame is fixedly connected to the second housing; the flexible screen includes a first display area, a second display area, and a third display area connected in sequence, wherein the first display area is fixed to the first housing, and the third display area is fixed to the second housing.

[0036] It is understandable that by providing a first latch within the main shaft, when the electronic device is in a flattened state, at least a portion of the first plug-in portion of the first latch can be inserted into the first slot of the first connecting arm. In this way, the first connecting arm can no longer rotate relative to the main shaft. The first fixing frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first fixing frame, and the second fixing frame can be maintained at a certain angle, such as 180 degrees. In other words, the main shaft, the first housing, and the second housing can be maintained at a certain angle, such as 180 degrees. In this way, the main shaft, the first housing, and the second housing are less likely to develop a hunchback problem when flattened.

[0037] Furthermore, when the electronic device is in a flattened state, the first connecting arm is locked from rotating by inserting the first latch into the first slot. The present application provides a folding mechanism and an electronic device that can be stably flattened and locked, thereby improving the stability of the electronic device in a flattened state.

[0038] In a third aspect, the present application provides an electronic device. The electronic device includes a folding mechanism, a first housing, and a second housing. The folding mechanism connects the first housing and the second housing and is used to relatively expand and close the first housing. The folding mechanism includes a main shaft, a first connecting arm, and a first latch. The first connecting arm includes a first connecting end and a second connecting end. The first connecting end is connected to the main shaft, and the second connecting end is connected to the first housing. The first connecting end is provided with a first slot. The first latch is located on the main shaft and movably connected to the main shaft. The first latch is used to be inserted into the first slot when the electronic device is in a flattened state.

[0039] It is understandable that by providing a first latch within the main shaft, when the electronic device is in a flattened state, at least a portion of the first plug-in portion of the first latch can be inserted into the first slot of the first connecting arm. In this way, the first connecting arm can no longer rotate relative to the main shaft. The first fixing frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first fixing frame, and the second fixing frame can be maintained at a certain angle, such as 180 degrees. In other words, the main shaft, the first housing, and the second housing can be maintained at a certain angle, such as 180 degrees. In this way, the main shaft, the first housing, and the second housing are less likely to develop a hunchback problem when flattened.

[0040] Furthermore, when the electronic device is in a flattened state, the first connecting arm is locked from rotating by inserting the first latch into the first slot. The present application provides a folding mechanism and an electronic device that can be stably flattened and locked, thereby improving the stability of the electronic device in a flattened state.

[0041] In one possible implementation, the folding mechanism includes a second connecting arm and a second pin; the second connecting arm includes a third connecting end and a fourth connecting end, the third connecting end is connected to the main shaft, the fourth connecting end is connected to the second shell, and the third connecting end is provided with a second slot; the second pin is located on the main shaft and is spaced apart from the first pin, the second pin is movably connected to the main shaft, and the second pin is used to be able to be inserted into the second slot when the electronic device is in a flattened state.

[0042] It is understood that by providing a second latch within the main shaft, the second latch can be inserted into the second slot of the second connecting arm when the electronic device is in a flattened state. This prevents the second connecting arm from rotating relative to the main shaft. The second fixing bracket also prevents rotation relative to the main shaft. In this case, the main shaft, first fixing bracket, and second fixing bracket can be better maintained at a certain angle, such as 180°. This also means that the main shaft, second housing, and second housing can be better maintained at a certain angle, such as 180°. This makes the main shaft, second housing, and second housing less likely to suffer from the problem of hunchback when flattened.

[0043] Furthermore, when the electronic device is in a flattened state, the second connecting arm is locked from rotating by inserting the second latch into the second slot. The present application provides a folding mechanism and an electronic device that can be stably flattened and locked, thereby improving the stability of the electronic device in a flattened state.

[0044] In one possible implementation, the first latch has a first meshing portion, and the second latch has a second meshing portion; the folding mechanism includes a synchronous gear, which is located on the main shaft and rotatably connected to the main shaft, and the second meshing portion meshes with the first meshing portion through the synchronous gear.

[0045] It is understood that by providing a synchronization gear between the first and second latch pins, the synchronization gear can simultaneously drive the movement of the second latch pin while driving the first latch pin. Thus, this embodiment can achieve synchronized movement of the first and second latch pins using a single driving force. The first and second latch pins are inserted into the first and second connecting arms, respectively. The folding mechanism of this embodiment is relatively simple in structure, reducing assembly difficulty and manufacturing costs.

[0046] In a possible implementation, the first latch has a first limiting portion, the second latch has a second limiting portion, a portion of the synchronous gear is located between the first limiting portion and the main shaft, and a portion of the synchronous gear is located between the second limiting portion and the main shaft.

[0047] It can be understood that the main shaft, the first stopper of the first latch, and the second stopper of the second latch cooperate to limit the position of the synchronizing gear in the thickness direction of the main shaft. Thus, the first and second latches not only lock the first and second connecting arms, respectively, when the folding mechanism is in the flattened state, but also cooperate with the main shaft to limit the position of the synchronizing gear in the thickness direction of the main shaft. The first and second latches achieve a "one-item, multi-purpose" effect.

[0048] In one possible implementation, the first connecting end and the third connecting end are arranged along a first direction, the first latch and the second latch are located between the first and third connecting ends, and the first latch and the second latch are arranged along a second direction, where the first direction is the longitudinal extension direction of the main axis, and the second direction intersects the first direction. In this way, the first connecting end of the first connecting arm, the third connecting end of the second connecting arm, and the first latch and the second latch are arranged more compactly on the main axis, achieving high space utilization.

[0049] In one possible implementation, the folding mechanism also includes a spring sheet, which includes a first straight portion, a bent portion and a second straight portion. The first straight portion and the second straight portion are both fixed to a side of the upper cover facing the accommodating space, and the bent portion protrudes in a direction close to the second latch; the second latch has a convex portion; when the first latch is inserted into the first slot, the convex portion of the second latch is located on a side of the bent portion of the spring sheet close to the third connection end; when the first latch is separated from the first slot, the convex portion of the second latch is located on a side of the bent portion of the spring sheet away from the third connection end.

[0050] It is understood that when the first latch is separated from the first slot, the bent portion of the spring can be used to block the second latch from moving in a direction approaching the second connecting arm. This prevents the second connecting arm from being unable to rotate due to the second plug-in portion of the second latch being inserted into the second slot during the second connecting arm's rotation, thereby ensuring that the second connecting arm can rotate relative to the main shaft. Because the bent portion of the spring can block the second latch from moving in a direction approaching the second connecting arm, the second latch will not drive the synchronous gear to rotate. The synchronous gear will not drive the first latch to move in a direction approaching the first connecting arm. This prevents the first connecting arm from being unable to rotate due to the plug-in portion of the first latch being inserted into the first slot during the first connecting arm's rotation, thereby ensuring that the first connecting arm can rotate relative to the main shaft.

[0051] It is understood that when the first latch is inserted into the first slot, the protrusion of the second latch can be located on the side of the bent portion of the spring clip that is closer to the third connection end of the second connecting arm. The bent portion of the spring clip can be used to block the second latch from moving away from the second connecting arm, thereby restricting the second plug-in portion of the second latch from dislodging from the second slot, ensuring that the second connecting arm no longer rotates relative to the main shaft, and improving the reliability of the connection between the second latch and the second connecting arm. It is understood that because the bent portion of the spring clip can block the second latch from moving away from the second connecting arm, the second latch will not drive the synchronization gear to rotate. The synchronization gear will not drive the first latch from moving away from the first connecting arm, thereby restricting the first plug-in portion of the first latch from dislodging from the first slot, further ensuring that the first connecting arm no longer rotates relative to the main shaft, and improving the reliability of the connection between the first latch and the first connecting arm.

[0052] In one possible implementation, the second connecting end is slidably connected to the first fixing frame; the folding mechanism includes a first bracket and a first elastic member, the first bracket is located on the first fixing frame and is slidably connected to the first fixing frame, and the first bracket is abutted against the second connecting end; the first elastic member is located on the first fixing frame, and one end of the first elastic member abuts against the first bracket, and the other end abuts against the first fixing frame, and the first elastic member is used to apply a damping force to the second connecting end through the first bracket.

[0053] It is understood that by providing the first bracket and the first elastic member on the first bracket, the first elastic member can apply a damping force to the second connecting end through the first bracket, thereby making it more difficult for the first connecting arm to rotate relative to the main axis in the absence of external force, thereby further locking the first connecting arm. In this embodiment, when the electronic device is folded or unfolded a large number of times, the damping force of the first elastic member will decrease, and the ability to resist and limit the first connecting arm will be weakened. In addition, when the folding mechanism is applied to the electronic device, the flexible screen will have a large retraction force after the electronic device is left in the folded state for a long time. Thus, when the electronic device is in the flattened state, due to the retraction force of the flexible screen, the flexible screen will overcome the smaller elastic force of the first elastic member to drive the first housing and the second housing closer to each other. The first housing can drive the first fixing frame to rotate relative to the main axis via the first connecting arm, and the second housing can drive the second fixing frame to rotate relative to the main axis via the second connecting arm. In this case, when the electronic device is in the flattened state, the first housing and the second housing cannot maintain the preset relative position relationship (for example, the first housing and the second housing are maintained at 180 degrees), that is, the electronic device will experience a flattening hunchback (unflattened) phenomenon. For example, there will be a relatively obvious angle between the first shell and the second shell, which may be 150°, 155° or 160°, etc. At this time, by arranging the first pin, the second pin and the synchronization gear in the main shaft, when the electronic device is in a flattened state, the first pin can be inserted into the first slot of the first connecting arm, and the second pin can be inserted into the second slot of the second connecting arm. At this time, even if the flexible screen applies a force to the first shell and the second shell to move closer to each other, the first connecting arm and the second connecting arm no longer rotate relative to the main shaft, the first fixing frame and the second fixing frame no longer rotate relative to the main shaft, and the first shell and the second shell no longer rotate relative to the main shaft. At this time, the first shell and the second shell can be maintained in a preset relative position (for example, the first shell and the second shell are maintained at 180°). When the electronic device is in a flattened state, the electronic device is more beautiful.

[0054] It is understandable that if the folding mechanism includes a first bracket and a first elastic member, the user can choose whether to insert the first pin into the first slot when the electronic device is in a flat state. For example, when the electronic device is folded or flattened a few times, since the damping force of the first elastic member is normal, the first elastic member can normally apply the damping force to the second connecting end through the first bracket. At this time, the first bracket and the first elastic member can lock the rotation of the first connecting arm, and the user does not need to insert the first pin into the first slot when the electronic device is in a flat state. When the electronic device is folded or flattened a lot of times, since the damping force of the first elastic member fails, the first elastic member cannot normally apply the damping force to the second connecting end through the first bracket. At this time, the first bracket and the first elastic member cannot lock the rotation of the first connecting arm, and the user can insert the first pin into the first slot when the electronic device is in a flat state. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0056] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application in a flattened state;

[0057] FIG2 is a partial cross-sectional schematic diagram of an embodiment of the electronic device shown in FIG1 taken along line AA;

[0058] FIG3 is a schematic structural diagram of an embodiment of the electronic device shown in FIG1 in a closed state;

[0059] FIG4 is a partial cross-sectional schematic diagram of an embodiment of the electronic device shown in FIG3 taken along line BB;

[0060] FIG5 is a partially exploded view of the electronic device shown in FIG1 in one embodiment;

[0061] FIG6 is a schematic structural diagram of the folding mechanism shown in FIG1 at another angle;

[0062] FIG7 is a partially exploded view of the folding mechanism shown in FIG6 in one embodiment;

[0063] FIG8 is a partially exploded view of the folding mechanism shown in FIG7 in one embodiment;

[0064] FIG9 is a partially exploded view of the folding mechanism shown in FIG8 in one embodiment;

[0065] FIG10 is an enlarged schematic diagram of the middle portion of the base shown in FIG9 in one embodiment;

[0066] FIG11 is a schematic structural diagram of the upper cover shown in FIG9 at another angle;

[0067] FIG12 is a schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0068] FIG13 is a partial cross-sectional schematic diagram of an embodiment of the main shaft shown in FIG12 at line CC;

[0069] FIG14 is a partial cross-sectional schematic diagram of an embodiment of the main shaft shown in FIG12 at line DD;

[0070] FIG15 is a partial cross-sectional schematic diagram of an embodiment of the main shaft shown in FIG12 at line EE;

[0071] FIG16 is a partially exploded view of the middle connection assembly shown in FIG8 in one embodiment;

[0072] FIG17 is a schematic diagram of a partial structure of the middle connecting assembly shown in FIG16 in one embodiment;

[0073] FIG18 is a schematic structural diagram of the first connecting arm and the second connecting arm shown in FIG16 in one embodiment;

[0074] FIG19 is a second schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0075] FIG20 is a third schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0076] FIG21 is a partial cross-sectional schematic diagram of an embodiment of the folding mechanism shown in FIG20 at line FF;

[0077] FIG22 is a partial cross-sectional view of the folding mechanism shown in FIG21 in a folded state;

[0078] FIG23 is a partial cross-sectional view of an embodiment of the folding mechanism shown in FIG22 at line GG;

[0079] FIG24 is a schematic structural diagram of the first latch shown in FIG16 at different angles in one embodiment;

[0080] FIG25 is a fourth schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0081] FIG26 is a fifth schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0082] FIG27 is a schematic diagram of a portion of the structure of the electronic device shown in FIG25 in a locked state;

[0083] FIG28 is a schematic structural diagram of the second latch shown in FIG16 at another angle in one embodiment;

[0084] FIG29 is a sixth schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0085] FIG30 is a schematic structural diagram of the folding mechanism shown in FIG29 in one embodiment;

[0086] FIG31 is a schematic diagram of a partial structure of the folding mechanism shown in FIG8 at another angle in one embodiment;

[0087] FIG32 is a schematic diagram of a partial structure of the folding mechanism shown in FIG8 in one embodiment;

[0088] FIG33 is a schematic structural diagram of the folding mechanism shown in FIG32 in one embodiment;

[0089] FIG34 is a partially exploded view of the first damping member and the second damping member shown in FIG16 in one embodiment;

[0090] FIG35 is an enlarged view of the first damping member, the second damping member, the third damping member and the fourth damping member shown in FIG16;

[0091] FIG36 is a partial structural schematic diagram eight of the folding mechanism shown in FIG8 in one embodiment;

[0092] FIG37 is an exploded view of the electronic device shown in FIG6 from another angle in one embodiment;

[0093] FIG38 is a schematic structural diagram of the electronic device shown in FIG37 in a folded state;

[0094] FIG39 is a schematic diagram of a partial structure of the electronic device shown in FIG6 at another angle in one embodiment. DETAILED DESCRIPTION

[0095] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0096] In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "install", "connect", "connect", and "connect" should be understood in a broad sense. 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; it can be an electrical connection or a mechanical connection. Among them, "fixed connection" means that they are connected to each other and the relative position relationship after connection remains unchanged. "Rotational connection" means that they are connected to each other and can rotate relative to each other after connection. "Sliding connection" means that they are connected to each other and can slide relative to each other after connection. In addition, two components are obtained by an integrated structure through an integrated molding process, which means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together through reprocessing (such as bonding, welding, snap connection, screw connection).

[0097] The directional terms mentioned in the embodiments of the present application, such as "top", "bottom", "inner", "outer", etc., are only used to refer to the directions in the drawings. Therefore, the directional terms used are for better and clearer description and understanding of the embodiments of the present application, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0098] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0099] Figure 1 is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application in a flattened state. Figure 2 is a schematic diagram of a partial cross-section of the electronic device 1000 shown in Figure 1 taken along line AA. Figure 3 is a schematic diagram of the structure of the electronic device 1000 shown in Figure 1 in a closed state. Figure 4 is a schematic diagram of a partial cross-section of the electronic device 1000 shown in Figure 3 taken along line BB.

[0100] As shown in Figures 1 to 4, the present application provides a foldable electronic device 1000. The foldable electronic device 1000 can be a foldable device such as a mobile phone, tablet computer, personal computer, laptop computer, vehicle-mounted device, or wearable device (such as a smart bracelet). The present application embodiment is described in detail using the example of the electronic device 1000 being a mobile phone.

[0101] For ease of description, for example, the thickness direction of the electronic device 1000 is defined as the Z-axis direction, and the extension direction of the rotation axis of the electronic device 1000 is the Y-axis direction, that is, the width direction of the electronic device 1000 is the Y-axis direction. The direction perpendicular to the Y-axis direction and the Z-axis direction is the X-axis direction, that is, the length direction of the electronic device 1000 is the X-axis. It will be understood that the coordinate system of the electronic device 1000 can also be flexibly set according to specific needs. For example, the Y-axis direction is defined as the first direction, the X-axis direction is defined as the second direction, and the Z-axis direction is defined as the third direction. In other embodiments, the first direction, the second direction, and the third direction can also be flexibly set according to needs, and it is sufficient to ensure that the first direction, the second direction, and the third direction intersect with each other.

[0102] It can be understood that in this embodiment, the direction of the rotation axis of the electronic device 1000 is the Y-axis direction, that is, the electronic device 1000 can be relatively flattened or folded along the Y-axis direction. In this way, when the electronic device 1000 is in a folded state, the size of the electronic device 1000 in the X-axis direction becomes smaller. This embodiment is explained by taking "the direction of the rotation axis of the electronic device 1000 is the Y-axis direction" as an example. At this time, the electronic device 1000 can be folded left and right, and the folding and flattening of the electronic device 1000 affects the length dimension of the electronic device 1000. In some other embodiments, the rotation axis of the electronic device 1000 can also be the X-axis direction, that is, the electronic device 1000 can be relatively flattened or folded along the X-axis direction. At this time, the electronic device 1000 can be folded up and down, and the folding and flattening of the electronic device 1000 affects the width dimension of the electronic device 1000.

[0103] Fig. 5 is a partial exploded view of the electronic device 1000 shown in Fig. 1 in one embodiment. Fig. 6 is a partial structural diagram of the electronic device 1000 shown in Fig. 1 in one embodiment.

[0104] As shown in Figures 5 and 6, the electronic device 1000 includes a folding mechanism 100, a flexible screen 200, a first shell 300, and a second shell 400. The flexible screen 200 can be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MLED) display, or a quantum dot light-emitting diode (QLED) display. In addition, the folding mechanism 100 can be an external folding mechanism or an internal folding mechanism. An external folding mechanism refers to a folding mechanism that can fold at least part of the flexible screen 200 to the outside of the shell. An internal folding mechanism refers to a folding mechanism that can fold at least part of the flexible screen 200 between two shells. This application does not limit the specific structure of the folding mechanism 100. In this embodiment, the folding mechanism 100 is described as an external folding mechanism.

[0105] 5 and 6 , illustratively, the folding mechanism 100 is connected between the first housing 300 and the second housing 400. The folding mechanism 100 is used to relatively unfold or fold the first housing 300 and the second housing 400.

[0106] As shown in Figures 1 and 2, when the first housing 300 and the second housing 400 are relatively unfolded to a flat state, the electronic device 1000 is in a flat state, and the first housing 300 and the second housing 400 can be 180 degrees apart. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation from 180 degrees, such as 165 degrees, 177 degrees, or 185 degrees.

[0107] As shown in Figures 3 and 4, when the first shell 300 and the second shell 400 are folded relative to each other to a closed state, the electronic device 1000 is in a folded state, the first shell 300 and the second shell 400 can be closed to each other, and there can be no large gap between the first shell 300 and the second shell 400. In this way, the appearance experience of the electronic device 1000 is better, and the waterproof, dustproof and foreign body-proof performance is better. The situation where the first shell 300 and the second shell 400 are closed includes the situation where the two are against each other, and can also include the situation where there is a small gap between the two. When there is a small gap between the first shell 300 and the second shell 400, some foreign objects outside the electronic device 1000 will not enter between the first shell 300 and the second shell 400 through the gap.

[0108] The first shell 300 and the second shell 400 can also be relatively unfolded or folded to an intermediate state, so that the electronic device 1000 is in an intermediate state. The intermediate state can be any state between the unfolded state and the closed state.

[0109] Referring to Figure 5 , and in conjunction with Figures 1 to 4 , the flexible screen 200 includes a first display area 201, a second display area 202, and a third display area 203. The second display area 202 is connected between the first display area 201 and the third display area 203. Figures 1 , 2 , and 5 all use dashed lines to schematically distinguish the first display area 201, the second display area 202, and the third display area 203. The first display area 201 of the flexible screen 200 is fixedly connected to the first housing 300. The third display area 203 is fixedly connected to the second housing 400. During the relative expansion or folding of the first housing 300 and the second housing 400, the first housing 300 can drive the first display area 201 to move, and the second housing 400 can drive the third display area 203 to move. The first display area 201 and the third display area 203 can expand or fold relative to each other, and the second display area 202 can deform.

[0110] It can be understood that since the first display area 201 is fixedly connected to the first shell 300 and the third display area 203 is fixedly connected to the second shell 400, when the first shell 300 and the second shell 400 are relatively unfolded or folded, the relative unfolding and folding movements between the first display area 201 and the third display area 203 can be accurately controlled, so that the folding process and movement form of the flexible screen 200 are controllable and the reliability is relatively high.

[0111] As shown in Figures 1 and 2, when the electronic device 1000 is in a flattened state, the flexible screen 200 can be in a flattened state. For example, the first display area 201, the second display area 202, and the third display area 203 of the flexible screen 200 can be 180 degrees. In other embodiments, the first display area 201, the second display area 202, and the third display area 203 can also have a slight deviation from 180 degrees, such as 165 degrees, 177 degrees, or 185 degrees. In this case, the flexible screen 200 has a continuous large display area, that is, the flexible screen 200 can achieve large-screen display, and the user experience is better.

[0112] For example, when the electronic device 1000 is in a flattened state, at least a portion of the folding mechanism 100 can be used to support the second display area 202. In this way, when the second display area 202 is subjected to pressing force, squeezing force, or impact force, the folding mechanism 100 can be used to improve the pressure resistance and impact resistance of the second display area 202, that is, to prevent the second display area 202 from being easily dented.

[0113] As shown in Figures 3 and 4, when the electronic device 1000 is in a folded state, the flexible screen 200 is in a folded state. For example, the first display area 201 and the third display area 203 of the flexible screen 200 are close to each other. The second display area 202 is bent. At this time, the flexible screen 200 can be roughly U-shaped. In addition, the flexible screen 200 is located outside the first shell 300, the folding mechanism 100 and the second shell 400. The first shell 300 and the second shell 400 are located between the first display area 201 and the third display area 203. At this time, the plane size of the electronic device 1000 is small (with a small width dimension), which is convenient for users to carry and store.

[0114] Fig. 7 is a partially exploded view of the folding mechanism 100 shown in Fig. 6 in one embodiment. Fig. 8 is a partially exploded view of the folding mechanism 100 shown in Fig. 7 in one embodiment.

[0115] 7 and 8, in conjunction with FIG5 and FIG6, the folding mechanism 100 includes a main shaft 1, a middle connecting assembly 2, an end connecting assembly 3, a first shielding plate 4a, and a second shielding plate 4b. The main shaft 1 extends in the Y-axis direction.

[0116] Illustratively, the spindle 1 is located between the first housing 300 and the second housing 400. The middle connecting assembly 2 connects the first housing 300, the spindle 1, and the second housing 400. The end connecting assembly 3 connects the first housing 300, the spindle 1, and the second housing 400. There are two end connecting assemblies 3, which are spaced apart in the axial direction of the spindle 1. For example, they can be connected to the top and bottom of the spindle 1, respectively. The two end connecting assemblies 3 are located on either side of the middle connecting assembly 2, that is, the middle connecting assembly 2 is located between the two end connecting assemblies 3.

[0117] It is understood that the interaction between the end connection assembly 3 and the middle connection assembly 2 enables the first housing 300 and the second housing 400 to be relatively expanded or folded. For example, the end connection assembly 3 is primarily used to enable the first housing 300 and the second housing 400 to be relatively expanded or folded. The middle connection assembly 2 is used to assist the end connection assembly 3 in enabling the first housing 300 and the second housing 400 to be relatively expanded or folded. The specific structure of the end connection assembly 3 is not specifically limited in this application.

[0118] Exemplarily, the first shielding plate 4a and the second shielding plate 4b are respectively connected to the two sides of the main shaft 1. When the electronic device 1000 is in a flattened state, the first shielding plate 4a is used to shield the gap between the first shell 300 and the main shaft 1, and the second shielding plate 4b is used to shield the gap between the second shell 400 and the main shaft 1. Therefore, in the flattened state, the folding mechanism 100 can jointly shield the gap between the first shell 300 and the second shell 400 by the first shielding plate 4a and the second shielding plate 4b, thereby achieving self-shielding, which is beneficial to improving the integrity of the appearance and reducing the risk of external dust, debris, etc. entering the folding mechanism 100, so as to ensure the reliability of the electronic device 1000. In some embodiments, the rotation center of the folding mechanism 100 as a whole is parallel to the axial direction of the main shaft 1, and the main shaft 1 extends along its axial direction.

[0119] As shown in Figure 8, the structures of the two end connection components 3 are mirror-symmetrical. At this time, since the structures of the two end connection components 3 are the same, the overall structure of the folding mechanism 100 is relatively simple and the processing cost is low. Since the two end connection components 3 are arranged in a mirror-symmetrical manner, during the rotation of the folding mechanism 100, the stress between the two end connection components 3 and the main shaft 1, the first shell 300 and the second shell 400 is relatively uniform, which is beneficial to improving the reliability of the folding mechanism 100. In some other embodiments, the structures of the two end connection components 3 may also be different. In some other embodiments, the embodiment of the present application may also only provide one end connection component 3, located at one end of the folding mechanism 100. It can be understood that the structure of the folding mechanism 100 can have a variety of combinations and deformation methods, and the embodiment of the present application does not strictly limit this.

[0120] FIG. 9 is a partially exploded view of the folding mechanism 100 shown in FIG. 8 in one embodiment.

[0121] As shown in FIG. 8 and FIG. 9 , in some embodiments, the main shaft 1 includes a base 11 and an upper cover 12 .

[0122] The base 11 is an integrally molded structure. It includes a first end portion 11a, a middle portion 11b, and a second end portion 11c, which are sequentially connected. The first end portion 11a and the second end portion 11c of the base 11 can be used to connect to the two end connection assemblies 3, respectively. The middle portion 11b of the base 11 can be used to connect to the middle connection assembly 2. It should be understood that for clarity and convenience in describing the specific structure of the base 11, FIG9 schematically distinguishes the first end portion 11a, the middle portion 11b, and the second end portion 11c using dashed lines.

[0123] It is understood that the first end 11a of the base 11 and the second end 11c of the base 11 can have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. For example, the first end 11a of the base 11 and the second end 11c of the base 11 have symmetrical structures. The structures of the first end 11a and the second end 11c of the base 11 can be determined based on the structure of the end connection assembly 3. This application does not specifically limit this.

[0124] As shown in Figure 9, the base 11 includes a front surface 11d and a back surface 11e. The back surface 11e of the base 11 is connected to the front surface 11d of the base 11. The front surface 11d of the base 11 is the surface of the base 11 facing the flexible screen 200. The back surface 11e of the base 11 is the surface of the base 11 facing away from the flexible screen 200.

[0125] FIG10 is an enlarged schematic diagram of the middle portion 11 b of the base 11 shown in FIG9 in one embodiment.

[0126] As shown in FIG. 10 , the middle portion 11 b of the base 11 is provided with a first groove 111 a , a second groove 111 b and a receiving groove 112 .

[0127] For example, both the first groove 111a and the second groove 111b may extend through the back surface 11e of the base 11. The bottom walls of the first groove 111a and the second groove 111b may be curved, meaning that both the first groove 111a and the second groove 111b include curved bottom walls. It is understood that the first groove 111a extending through the back surface 11e of the base 11 may mean that the first groove 111a forms an opening on the back surface 11e of the base 11. Any related descriptions below should be referred to the definitions herein. The details will not be elaborated upon below.

[0128] For example, the receiving groove 112 may be located between the first groove 111 a and the second groove 111 b and communicate with the first groove 111 a and the second groove 111 b .

[0129] Exemplarily, the middle portion 11b of the base 11 further comprises a first avoidance groove 113. The first avoidance groove 113 is located within the first groove 111a. The first avoidance groove 113 forms an opening at the bottom wall of the first groove 111a and communicates with the accommodating groove 112.

[0130] Exemplarily, the middle portion 11b of the base 11 further comprises a second avoidance groove 114. The second avoidance groove 114 is located in the second groove 111b. The second avoidance groove 114 forms an opening at the bottom wall of the second groove 111b and communicates with the accommodating groove 112.

[0131] For example, the middle portion 11b of the base 11 may also be provided with a plurality of fastening holes 115. The fastening holes 115 of the base 11 may be blind holes, or may pass through the back side 11e of the base 11 but may not pass through the front side 11d of the base 11.

[0132] As shown in FIG. 10 , the middle portion 11 b of the base 11 includes a rotating shaft 116 , a first limiting block 117 , and a second limiting block 118 .

[0133] For example, the rotating shaft 116 may be located in the receiving groove 112. In this case, the rotating shaft 116 is protruded from the bottom wall of the receiving groove 112. In one embodiment, the rotating shaft 116 may be located in the middle portion 11b of the receiving groove 112.

[0134] Exemplarily, the first stopper 117 and the second stopper 118 are both located within the receiving groove 112. In this case, the first stopper 117 and the second stopper 118 are spaced apart and protrude from the bottom wall of the receiving groove 112. The first stopper 117 and the second stopper 118 can be located on either side of the rotating shaft 116. It is understood that the first stopper 117 and the second stopper 118 of the base 11 can divide the receiving groove 112 into a first sub-groove 112a and a second sub-groove 112b that are interconnected. A portion of the rotating shaft 116 is located within the first sub-groove 112a, and a portion is located within the second sub-groove 112b.

[0135] FIG11 is a schematic structural diagram of the upper cover 12 shown in FIG9 at another angle.

[0136] As shown in Figure 11, the upper cover 12 includes a top surface 12a and a bottom surface 12b. The top surface 12a of the upper cover 12 is connected to the bottom surface 12b of the upper cover 12.

[0137] Exemplarily, the bottom surface 12 b of the upper cover 12 includes a first arcuate surface 121 and a second arcuate surface 122 that are spaced apart.

[0138] Exemplarily, the upper cover 12 is provided with a first avoidance hole 123. The first avoidance hole 123 passes through the top surface 12a and the bottom surface 12b of the upper cover 12. The first avoidance hole 123 is located between the first curved surface 121 and the second curved surface 122.

[0139] For example, the upper cover 12 is provided with a fixing hole 124. The fixing hole 124 passes through the top surface 12a and the bottom surface 12b of the upper cover 12. The fixing hole 124 is spaced apart from the first avoidance hole 123. The fixing hole 124 is also located between the first curved surface 121 and the second curved surface 122.

[0140] Exemplarily, the upper cover 12 is provided with a receiving groove 125 . The receiving groove 125 passes through the bottom surface 12 b of the upper cover 12 . The receiving groove 125 is located between the first curved surface 121 and the second curved surface 122 .

[0141] For example, the upper cover 12 may also be provided with a plurality of fastening holes 126. The fastening holes 126 of the upper cover 12 may be through holes, and the fastening holes 126 of the upper cover 12 may pass through the top surface 12a and the bottom surface 12b of the upper cover 12.

[0142] FIG12 is a schematic diagram of a partial structure of the folding mechanism 100 shown in FIG8 in one embodiment.

[0143] Referring to Figure 12 , and in conjunction with Figures 10 and 11 , the upper cover 12 is secured to the base 11. The bottom surface 12b of the upper cover 12 faces the back surface 11e of the base 11. For example, the multiple fastening holes 115 of the base 11 are aligned with the multiple fastening holes 126 of the upper cover 12. Fasteners pass through the fastening holes 115 of the base 11 and the fastening holes 126 of the upper cover 12 to secure the upper cover 12 to the base 11. The fasteners may include screws, bolts, rivets, or pins.

[0144] For example, the rotating shaft 116 of the base 11 can pass through the fixing hole 124 of the upper cover 12. In this case, a portion of the rotating shaft 116 is located within the fixing hole 124. It can be understood that the cooperation between the rotating shaft 116 and the fixing hole 124 can make the connection between the upper cover 12 and the base 11 more secure, that is, the connection stability between the upper cover 12 and the base 11 is improved.

[0145] FIG13 is a partial cross-sectional schematic diagram of an embodiment of the main shaft 1 shown in FIG12 at line CC.

[0146] As shown in Figure 13, after the upper cover 12 and the base 11 are fixed to each other, the first curved surface 121 of the upper cover 12 and the curved bottom wall of the first groove 111a of the base 11 are spaced apart, and the first curved surface 121 of the upper cover 12 and the first groove 111a of the base 11 form the first curved groove 13 of the main shaft 1.

[0147] FIG14 is a partial cross-sectional schematic diagram of an embodiment of the main shaft 1 shown in FIG12 at line DD.

[0148] The second arcuate surface 122 of the upper cover 12 is spaced apart from the arcuate bottom wall of the second groove 111 b of the base 11 . The second arcuate surface 122 of the upper cover 12 and the second groove 111 b of the base 11 form the second arcuate groove 14 of the main shaft 1 .

[0149] FIG15 is a partial cross-sectional schematic diagram of an embodiment of the main shaft 1 shown in FIG12 at line EE.

[0150] As shown in Figure 15, after the upper cover 12 and the base 11 are fixed to each other, a portion of the bottom surface 12b of the upper cover 12 and the first sub-groove 112a of the receiving groove 112 form the first receiving space 15 of the main shaft 1, and a portion of the bottom surface 12b of the upper cover 12 and the second sub-groove 112b of the receiving groove 112 form the second receiving space 16 of the main shaft 1. The first receiving space 15 and the second receiving space 16 are connected to form a receiving space 150, that is, the receiving space 150 includes the first receiving space 15 and the second receiving space 16. In addition, the first avoidance hole 123 of the upper cover 12 is connected to the first receiving space 15 and / or the second receiving space 16. At this time, the first avoidance hole 123 can be connected to the receiving space 150.

[0151] As shown in FIG. 15 , a portion of the rotating shaft 116 may be located in the first accommodating space 15 , and a portion thereof may be located in the second accommodating space 16 .

[0152] FIG. 16 is a partially exploded view of the middle connection assembly 2 shown in FIG. 8 in one embodiment.

[0153] As shown in Figure 16, the middle connecting assembly 2 includes a first fixing frame 21, a second fixing frame 22, a first connecting arm 23, a second connecting arm 24, a plug assembly 25, a first damping member 26a, a second damping member 26b, a third damping member 26c, and a fourth damping member 26d. For example, the plug assembly 25 includes a first latch 251, a second latch 252, a synchronizing gear 253, and a spring 254.

[0154] FIG17 is a schematic diagram of a partial structure of the middle connecting assembly 2 shown in FIG16 in one embodiment.

[0155] As shown in FIG. 17 , the first fixing frame 21 includes a bottom plate 211 , a slider 212 , a first guide rail block 213 a , a second guide rail block 213 b , a first protrusion 214 a , a second protrusion 214 b , and a first guide post 215 a .

[0156] Exemplarily, the bottom plate 211 of the first fixing frame 21 includes a first surface 216 a and a second surface 216 b disposed in opposite directions.

[0157] For example, the slider 212 is protruded from the first surface 216a of the bottom plate 211 of the first fixing frame 21. The slider 212 may extend in the direction of the X axis. In one embodiment, the slider 212 is substantially T-shaped.

[0158] Illustratively, the first protrusion 214a is protruded from the first surface 216a of the bottom plate 211 of the first fixing frame 21. The first protrusion 214a is located on one side of the slider 212 and is spaced apart from the slider 212. The space between the first protrusion 214a and the slider 212 is a first space 217a.

[0159] For example, the first guide post 215a is protruded from the surface of the first protrusion 214a facing the slider 212. The first guide post 215a is located in the first space 217a. The number of the first guide posts 215a can be two. The two first guide posts 215a are spaced apart.

[0160] Exemplarily, the first guide rail block 213a is protruded on the first surface 216a of the bottom plate 211 of the first fixed frame 21. The first guide rail block 213a is located between the slider 212 and the first protrusion 214a, that is, the first guide rail block 213a is located in the first space 217a. The length extension direction of the first guide rail block 213a can be the Y-axis direction. The first guide rail block 213a is provided with a first guide groove 218a. The length extension direction of the first guide groove 218a can be the Y-axis direction. In one embodiment, the number of the first guide rail blocks 213a can be two, and the two first guide rail blocks 213a can be spaced apart along the X-axis direction. The first guide grooves 218a of the two first guide rail blocks 213a are arranged relative to each other.

[0161] Exemplarily, the second protrusion 214b is protruding from the first surface 216a of the bottom plate 211 of the first fixing frame 21. The second protrusion 214b is located on a side of the slider 212 away from the first protrusion 214a and is spaced apart from the slider 212. The space between the second protrusion 214b and the slider 212 is a second space 217b.

[0162] Exemplarily, the second guide rail block 213b is protruded on the first surface 216a of the bottom plate 211 of the second fixed frame 22. The second guide rail block 213b is located between the slider 212 and the second protrusion 214b, that is, the second guide rail block 213b is located in the second space 217b. The length extension direction of the second guide rail block 213b can be the Y-axis direction. The second guide rail block 213b is provided with a second guide groove 218b. The length extension direction of the second guide groove 218b can be the Y-axis direction. In one embodiment, the number of the second guide rail blocks 213b can be two, and the two second guide rail blocks 213b can be spaced apart along the X-axis direction. The second guide grooves 218b of the two second guide rail blocks 213b are arranged relative to each other.

[0163] It is understood that the second fixing frame 22 and the first fixing frame 21 may have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the second fixing frame 22 and the first fixing frame 21 are symmetrical structures. The basic design of the component structure of the second fixing frame 22, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the assembly can refer to the relevant solutions of the first fixing frame 21. At the same time, the second fixing frame 22 and the first fixing frame 21 can have slight differences in the detailed structure or position arrangement of the components. The details will not be repeated here.

[0164] FIG18 is a schematic structural diagram of the first connecting arm 23 and the second connecting arm 24 shown in FIG16 in one embodiment.

[0165] As shown in Figure 18, the first connecting arm 23 includes a first connecting end 231 and a second connecting end 232 connected to the first connecting end 231. It will be appreciated that this embodiment is described using the example of the first connecting end 231 of the first connecting arm 23 as a rotating end and the second connecting end 232 as a sliding end. In other embodiments, the movement of the first connecting end 231 and the second connecting end 232 of the first connecting arm 23 is not specifically limited.

[0166] Exemplarily, the first connecting end 231 of the first connecting arm 23 is arc-shaped. The first connecting end 231 of the first connecting arm 23 includes a top surface 231a and a bottom surface 231b disposed in opposite directions, as well as a first side surface 231c and a second side surface 231d disposed in opposite directions. The first side surface 231c and the second side surface 231d of the first connecting end 231 are connected between the top surface 231a and the bottom surface 231b of the first connecting end 231. Exemplarily, both the top surface 231a and the bottom surface 231b of the first connecting end 231 can be arc-shaped. The first side surface 231c and the second side surface 231d of the first connecting end 231 can be flat and arc-shaped.

[0167] Illustratively, the first connecting end 231 of the first connecting arm 23 is provided with a first slot 2311. The first slot 2311 penetrates the top surface 231a, the bottom surface 231b, and the first side surface 231c of the first connecting end 231. In other embodiments, the first slot 2311 may not penetrate the top surface 231a and / or the bottom surface 231b of the first connecting end 231.

[0168] It is understandable that the cross-sectional shape of the first slot 2311 is not limited to the trapezoidal shape shown in FIG. 18 , and the cross-sectional shape of the first slot 2311 may also be rectangular, semicircular, triangular, or irregular.

[0169] As shown in Figure 18, the second connecting end 232 of the first connecting arm 23 is provided with a first slot 2321. The first slot 2321 can extend through the bottom and side surfaces of the second connecting end 232. The bottom surface of the second connecting end 232 is connected to the bottom surface 231b of the first connecting end 231. The side surface of the second connecting end 232 is the surface of the second connecting end 232 that is away from the first connecting end 231. For example, the first slot 2321 can be T-shaped.

[0170] It is understood that the second connecting arm 24 and the first connecting arm 23 of this embodiment may have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the second connecting arm 24 and the first connecting arm 23 are symmetrical structures. The basic design of the component structure of the second connecting arm 24, the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the assembly can all refer to the relevant solutions of the first connecting arm 23. For example, the second connecting arm 24 includes a third connecting end 241 and a fourth connecting end 242 connected to the third connecting end 241. The third connecting end 241 of the second connecting arm 24 is provided with a second slot 2411. The second slot 2411 can extend through the second side surface 241d of the third connecting end 241 (the second side surface 241d of the third connecting end 241 is oriented in the same direction as the second side surface 231d of the first connecting end 231 of the first connecting arm 23). At the same time, the second connecting arm 24 and the first connecting arm 23 may have slight differences in the detailed structure or positional arrangement of the components. The details will not be detailed here. In this embodiment, the third connecting end 241 of the second connecting arm 24 is a rotating end and the fourth connecting end 242 is a sliding end. In other embodiments, the movement mode of the third connecting end 241 and the fourth connecting end 242 of the second connecting arm 24 is not specifically limited.

[0171] Figure 19 is a second schematic diagram of a partial structure of the folding mechanism 100 shown in Figure 8 in one embodiment. Figure 20 is a third schematic diagram of a partial structure of the folding mechanism 100 shown in Figure 8 in one embodiment. Figure 21 is a partial cross-sectional schematic diagram of the folding mechanism 100 shown in Figure 20 at line FF in one embodiment.

[0172] As shown in Figures 19 to 21, the first connecting end 231 of the first connecting arm 23 is rotatably connected to the main shaft 1. For example, the first connecting end 231 of the first connecting arm 23 can be located within the first arcuate groove 13 of the main shaft 1. The first connecting end 231 of the first connecting arm 23 can rotate within the first arcuate groove 13 of the main shaft 1. Specifically, the top surface 231a of the first connecting end 231 of the first connecting arm 23 can face the first arcuate surface 121 of the upper cover 12, and the bottom surface 231b of the first connecting end 231 of the first connecting arm 23 can face the arcuate bottom surface of the first groove 111a of the base 11. It is understood that the first connecting end 231 of the first connecting arm 23 is connected to the main shaft 1 via a virtual axis. This rotatable connection is relatively simple in structure and occupies little space, which helps reduce the thickness of the folding mechanism 100, making it easier to achieve a lightweight and thin design for the folding mechanism 100 and the electronic device 1000. In some other embodiments, the first connecting end 231 of the first connecting arm 23 may also be connected to the main shaft 1 through a real shaft, which is not strictly limited in the embodiments of the present application.

[0173] As shown in Figures 19 to 21, the second connecting end 232 of the first connecting arm 23 is slidably connected to the first fixed frame 21. For example, at least a portion of the slider 212 of the first fixed frame 21 can be located within the first slide groove 2321 of the second connecting end 232 (Figure 18 also illustrates the structure of the first slide groove 2321, and details can also be found in Figure 18). It will be understood that in this embodiment, by configuring the slider 212 of the first fixed frame 21 and the first slide groove 2321 of the second connecting end 232 into a "T" shape, the slider 212 of the first fixed frame 21 and the first slide groove 2321 of the second connecting end 232 cooperate with each other to enable the first connecting arm 23 to slide relative to the first fixed frame 21 in the X-axis direction, thereby preventing separation in the Y-axis and Z-axis directions.

[0174] As shown in Figures 19 to 21, the third connecting end 241 of the second connecting arm 24 is rotatably connected to the main shaft 1. It is understood that the connection method between the third connecting end 241 of the second connecting arm 24 and the main shaft 1 can be similar to the connection method between the first connecting end 231 of the first connecting arm 23 and the main shaft 1. The details will not be repeated here.

[0175] In addition, the fourth connecting end 242 of the second connecting arm 24 is slidably connected to the second fixing frame 22. It is understood that the connection method between the fourth connecting end 242 of the second connecting arm 24 and the second fixing frame 22 can refer to the connection method between the second connecting end 232 of the first connecting arm 23 and the first fixing frame 21. The details are not repeated here.

[0176] As shown in Figures 19 to 21, the first fixing frame 21 can be connected to the main shaft 1 through the first connecting arm 23, and the second fixing frame 22 can be connected to the main shaft 1 through the second connecting arm 24. The main shaft 1 can be located between the first fixing frame 21 and the second fixing frame 22.

[0177] As shown in Figures 20 and 21, when the folding mechanism 100 is in the flattened state, the first fixing frame 21 and the second fixing frame 22 can be located on either side of the main shaft 1, and the first fixing frame 21 and the second fixing frame 22 can be unfolded relative to the main shaft 1. For example, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can be approximately 180 degrees. In other embodiments, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can also slightly deviate from 180 degrees, such as 165 degrees, 177 degrees, or 185 degrees.

[0178] Furthermore, when the folding mechanism 100 is in the flattened state, the majority of the first connecting end 231 of the first connecting arm 23 is located within the first arcuate groove 13 of the main shaft 1. A smaller portion of the slider 212 of the first fixing bracket 21 is located within the first sliding groove 2321 of the second connecting end 232 of the first connecting arm 23. It will be appreciated that the state of the second connecting arm 24 when the folding mechanism 100 is in the flattened state can be compared to the state of the first connecting arm 23 when the folding mechanism 100 is in the flattened state. The specific details of this embodiment will not be elaborated upon.

[0179] As shown in Figure 19, when the folding mechanism 100 is in the flattened state, the first slot 2311 of the first connecting end 231 of the first connecting arm 23 is positioned opposite the first avoidance groove 113 of the base 11, and the second slot 2411 of the third connecting end 241 of the second connecting arm 24 is positioned opposite the second avoidance groove 114 of the base 11. It will be understood that, in the present application, the relative positioning of component A and component B can mean that component A is projected along the target direction to form projection C, and component B is projected along the target direction to form projection D, and projections C and D can at least substantially overlap. In some embodiments, the substantial overlap can be any of the following: projection C is completely within projection D. Alternatively, projection D is completely within projection C. Alternatively, projection C and projection D intersect, and the intersection of projections C and D accounts for more than 50% of either projection C or projection D.

[0180] FIG22 is a partial cross-sectional view of the folding mechanism 100 shown in FIG21 in a folded state.

[0181] As shown in Figure 22, when the folding mechanism 100 is in the folded state, the first fixing frame 21 and the second fixing frame 22 are located on the same side of the main shaft 1, the first fixing frame 21 and the second fixing frame 22 are close to each other, and the first fixing frame 21 and the second fixing frame 22 are closed relative to the main shaft 1. For example, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can roughly form a "U" shape. In other embodiments, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can also form other shapes, which are not specifically limited in this application.

[0182] As shown in Figure 22 , when the folding mechanism 100 is in the folded state, a small portion of the first connecting end 231 of the first connecting arm 23 is located within the first arcuate groove 13 of the main shaft 1. The majority of the slider 212 of the first fixing frame 21 is located within the first slide groove 2321 (see Figure 18 ) of the second connecting end 232 of the first connecting arm 23. It will be appreciated that the state of the second connecting arm 24 when the folding mechanism 100 is in the folded state can be compared to the state of the first connecting arm 23 when the folding mechanism 100 is in the folded state. The specific details of this embodiment will not be described in detail here.

[0183] FIG23 is a partial cross-sectional view of an embodiment of the folding mechanism 100 shown in FIG22 taken along line GG.

[0184] As shown in FIG23 , in one embodiment, when the folding mechanism 100 is in the folded state, the first slot 2311 of the first connecting end 231 of the first connecting arm 23 and the first avoidance groove 113 of the base 11 can be staggered, that is, not positioned opposite each other. The arrangement of the second slot 2411 of the third connecting end 241 of the second connecting arm 24 and the second avoidance groove 114 of the base 11 can be similar to the arrangement of the first slot 2311 of the first connecting end 231 of the first connecting arm 23 and the first avoidance groove 113 of the base 11. The details are not further described here.

[0185] Please refer to Figures 21 and 22, and in combination with Figure 18, when the folding mechanism 100 is folded from the flattened state to the folded state, the first fixing frame 21 slides relative to the second connecting end 232 of the first connecting arm 23, the first connecting end 231 of the first connecting arm 23 rotates relative to the main shaft 1, the first fixing frame 21 moves closer to the main shaft 1, the second fixing frame 22 slides relative to the fourth connecting end 242 of the second connecting arm 24, the second fixing frame 22 moves closer to the main shaft 1, the third connecting end 241 of the second connecting arm 24 rotates relative to the main shaft 1, and the first fixing frame 21 and the second fixing frame 22 move closer to each other.

[0186] Please refer to Figures 21 and 22, and in combination with Figure 18, when the folding mechanism 100 is unfolded from the folded state to the flattened state, the first fixing frame 21 slides relative to the second connecting end 232 of the first connecting arm 23, the first connecting end 231 of the first connecting arm 23 rotates relative to the main shaft 1, the first fixing frame 21 moves away from the main shaft 1, the second fixing frame 22 slides relative to the fourth connecting end 242 of the second connecting arm 24, the second fixing frame 22 moves away from the main shaft 1, the third connecting end 241 of the second connecting arm 24 rotates relative to the main shaft 1, and the first fixing frame 21 and the second fixing frame 22 move away from each other.

[0187] FIG. 24 is a schematic structural diagram of the first latch 251 shown in FIG. 16 at different angles in one embodiment.

[0188] As shown in Figure 24 , the first latch 251 includes a first body 2511, a first plug-in portion 2512, a push portion 2513, a first engaging portion 2514, and a first stopper 2515. It will be appreciated that the first latch 251 in this embodiment is an integrally formed structure. To facilitate a clear and convenient description of the specific structure of the first latch 251, Figure 24 schematically illustrates the first body 2511 and the first plug-in portion 2512 using dashed lines. In other embodiments, the first latch 251 may also employ other structures. For example, the first latch 251 may not include the first engaging portion 2514 and the first stopper 2515.

[0189] Illustratively, the first body portion 2511 includes a side surface 2516 and a top surface 2517 and a bottom surface 2518 disposed opposite to each other. The side surface 2516 of the first body portion 2511 is connected between the top surface 2517 and the bottom surface 2518 of the first body portion 2511.

[0190] As shown in Figure 24, the push portion 2513 can be protruded from the top surface 2517 of the first body portion 2511. The shape of the push portion 2513 is not limited to the "L" shape shown in Figure 23. In other embodiments, the shape of the push portion 2513 can also be cylindrical, rectangular, irregular, etc.

[0191] As shown in Figure 24, the first plug-in portion 2512 can be protruded from the side surface 2516 of the first body portion 2511. The shape of the first plug-in portion 2512 is not limited to the trapezoidal shape shown in Figure 24. In other embodiments, the shape of the first plug-in portion 2512 can also be cylindrical, rectangular, irregular, etc.

[0192] As shown in Figure 24 , the first engaging portion 2514 can be protruded from a side surface 2516 of the first body portion 2511 and spaced apart from the first plug-in portion 2512. It is understood that the number of engaging teeth of the first engaging portion 2514 is not limited to the three shown in Figure 24 . The specific number can be determined based on demand.

[0193] As shown in FIG24 , the first limiting portion 2515 can be protruded from a side surface 2516 of the first body portion 2511 and located on one side of the first engaging portion 2514 .

[0194] Exemplarily, the top surface of the first limiting portion 2515 may be flush with the top surface of the first body portion 2511 .

[0195] Figure 25 is a fourth schematic diagram of a partial structure of the folding mechanism 100 shown in Figure 8 in one embodiment. Figure 26 is a fifth schematic diagram of a partial structure of the folding mechanism 100 shown in Figure 8 in one embodiment. Figure 25 may be a schematic diagram of the structure of Figure 26 with the upper cover 12 hidden.

[0196] As shown in Figures 25 and 26, at least a portion of the first latch 251 is located in the first accommodation space 15 of the main shaft 1. The first latch 251 is movably connected to the main shaft 1. Exemplarily, the first latch 251 is slidably connected to the main shaft 1.

[0197] It is understood that the cooperation between the base 11 and the upper cover 12 can limit the first latch 251 in the X-axis and Z-axis directions, and allow the first latch 251 to slide relative to the spindle 1 in the Y-axis direction. For example, the left side of the base 11 cooperates with the first limit block 117 and the second limit block 118 to limit the first latch 251 in the X-axis direction. The bottom of the base 11 cooperates with the upper cover 12 to limit the first latch 251 in the Z-axis direction.

[0198] Exemplarily, the first body portion 2511 of the first latch 251 is movably connected to the spindle 1. The top surface 2517 of the first body portion 2511 of the first latch 251 faces the same direction as the back surface 11e of the base 11 of the spindle 1. It is understandable that the first body portion 2511 is arranged between the bottom of the base 11 and the upper cover 12. The bottom of the base 11 and the upper cover 12 cooperate to limit the first body portion 2511 in the Z-axis direction. In addition, the first body portion 2511 is arranged between the left side of the base 11 and the first limit block 117 and the second limit block 118. The left side of the base 11 cooperates with the first limit block 117 and the second limit block 118 to limit the first body portion 2511 in the X-axis direction.

[0199] Illustratively, the first plug portion 2512 of the first latch 251 is positioned toward the first connecting arm 23. The first engaging portion 2514 is located between the first limiting portion 2515 and the bottom of the base 11. Furthermore, a portion of the pushing portion 2513 passes through the first avoidance hole 123 of the upper cover 12 from the accommodating space 150 and extends to the exterior of the spindle 1.

[0200] It will be appreciated that in this embodiment, when the electronic device 1000 is in the flattened state, the electronic device 1000 has two sub-states: an unlocked state and a locked state. When the electronic device 1000 is in the unlocked state, the first connecting arm 23 no longer rotates relative to the main shaft 1. When the electronic device 1000 is in the locked state, the first connecting arm 23 can rotate relative to the main shaft 1.

[0201] As shown in Figures 25 and 26, when the first latch 251 is in the unlocked state, at least a portion of the first plugging portion 2512 of the first latch 251 is not inserted into the first slot 2311 of the first connecting arm 23. In other words, at least a portion of the first plugging portion 2512 of the first latch 251 is located outside the first slot 2311 of the first connecting arm 23. At this time, the first connecting arm 23 can rotate relative to the main shaft 1 under external force.

[0202] For example, when the main shaft 1 is provided with a first avoidance groove 113, a portion of the first plug-in portion 2512 of the first pin 251 may not be inserted into the first avoidance groove 113 of the main shaft 1 (Figures 10 and 19 also illustrate the structure of the first avoidance groove 113, specifically refer to Figures 10 and 19), that is, a portion of the first plug-in portion 2512 of the first pin 251 is located outside the first avoidance groove 113.

[0203] FIG27 is a partial structural diagram of the electronic device 1000 shown in FIG25 in a locked state.

[0204] As shown in FIG. 27 , when the electronic device 1000 is in the locked state, at least a portion of the first plug portion 2512 of the first latch 251 is inserted into the first slot 2311 of the first connecting arm 23 .

[0205] For example, when the main shaft 1 is provided with the first avoidance groove 113, a portion of the first plug portion 2512 of the first latch 251 is also inserted into the first avoidance groove 113 of the main shaft 1. At this time, the first connecting arm 23 no longer rotates relative to the main shaft 1 under external force.

[0206] As shown in Figures 25 and 27, when the first pin 251 switches from the unlocked state to the locked state, the first pin 251 slides relative to the main shaft 1 along the negative direction of the Y axis, and the first plug-in portion 2512 of the first pin 251 can be inserted into the first slot 2311 of the first connecting arm 23 along the negative direction of the Y axis.

[0207] As shown in Figures 25 and 27, when the first pin 251 switches from the locked state to the unlocked state, the first pin 251 slides relative to the main shaft 1 along the positive direction of the Y axis, and the first plug-in portion 2512 of the first pin 251 can extend from the first slot 2311 of the first connecting arm 23 along the positive direction of the Y axis.

[0208] It will be appreciated that, by disposing the first latch 251 within the main shaft 1, the present application allows at least a portion of the first plug-in portion 2512 of the first latch 251 to be inserted into the first slot 2311 of the first connecting arm 23 when the electronic device 1000 is in the flattened state. This prevents the first connecting arm 23 from rotating relative to the main shaft 1. The first fixing bracket 21 also stops rotating relative to the main shaft 1. At this point, the main shaft 1, the first fixing bracket 21, and the second fixing bracket 22 can be maintained at a certain angle, such as 180°. This improves the stability and reliability of the folding mechanism 100 in the flattened state.

[0209] It will be appreciated that, by providing a first avoidance groove 113 within the first arcuate groove 13, the present application allows a portion of the first plug-in portion 2512 of the first latch 251 to be inserted into the first avoidance groove 113 when the electronic device 1000 is in a flattened state. The first avoidance groove 113 can be used to prevent the first latch 251 from interfering with the bottom wall of the first arcuate groove 13. Furthermore, the first avoidance groove 113 can also limit the first latch 251 in the X-axis direction to a certain extent, thereby improving the stability of the first latch 251.

[0210] It will be appreciated that the first latch 251 mentioned above can be movably connected to the main shaft 1. For example, the first latch 251 can slide relative to the main shaft 1 along the Y-axis. There are two ways to drive the first latch 251 relative to the main shaft 1: manual actuation and mechanical actuation. Manual actuation can involve, when the electronic device 1000 is in a flattened state, a user moving the push portion 2513 of the first latch 251 to move the first latch 251 along the Y-axis, thereby inserting or removing the first plugging portion 2512 of the first latch 251 into or out of the first slot 2311 of the first connecting arm 23. Mechanical actuation can involve a drive mechanism connected to the first latch 251, which drives the first latch 251 along the Y-axis, thereby inserting or removing the first plugging portion 2512 of the first latch 251 into or out of the first slot 2311 of the first connecting arm 23. The drive mechanism can include a motor, a transmission assembly, and other structures. The drive mechanism can be disposed within the main shaft 1. It is understandable that the present application does not limit the specific structure of the driving mechanism.

[0211] FIG. 28 is a schematic structural diagram of the second latch 252 shown in FIG. 16 at another angle in one embodiment.

[0212] As shown in Figure 28 , the second latch 252 includes a second body portion 2521, a second plug portion 2522, a protrusion 2523, a second engaging portion 2524, and a second stopper 2525. It will be appreciated that the second latch 252 in this embodiment is an integrally formed structure. To facilitate a clear and convenient description of the specific structure of the second latch 252, Figure 28 schematically illustrates the distinction between the second body portion 2521 and the second plug portion 2522 using dashed lines. In other embodiments, the second latch 252 may also employ other structures. For example, the second latch 252 may not include the second engaging portion 2524 and the second stopper 2525.

[0213] Illustratively, the second body portion 2521 includes a side surface 2526 and a top surface 2527 and a bottom surface 2528 disposed opposite to each other. The side surface 2526 of the second body portion 2521 is connected between the top surface 2527 and the bottom surface 2528 of the second body portion 2521 .

[0214] As shown in Figure 28, the protrusion 2523 can be protruding from the top surface 2527 of the second body portion 2521. The shape of the protrusion 2523 is not limited to the arch shape shown in Figure 28. In other embodiments, the shape of the protrusion 2523 can also be cylindrical, rectangular, irregular, etc.

[0215] As shown in Figure 28, the second plug-in portion 2522 can be protruded from the side surface 2526 of the second body portion 2521. The shape of the second plug-in portion 2522 is not limited to the trapezoidal shape shown in Figure 28. In other embodiments, the shape of the second plug-in portion 2522 can also be cylindrical, rectangular, irregular, etc.

[0216] As shown in Figure 28, the second engaging portion 2524 can be protruded from the side surface 2526 of the second body portion 2521 and spaced apart from the second plug-in portion 2522. It is understood that the number of engaging teeth of the second engaging portion 2524 is not limited to the three shown in Figure 28. The specific number can be determined according to needs.

[0217] 28 , the second limiting portion 2525 may be protruded from a side surface 2526 of the second body portion 2521 and located on one side of the second engaging portion 2524 . In this case, the second limiting portion 2525 may cover the second engaging portion 2524 .

[0218] Exemplarily, the top surface of the second limiting portion 2525 may be flush with the top surface of the second body portion 2521 .

[0219] FIG29 is a sixth schematic diagram of a partial structure of the folding mechanism 100 shown in FIG8 in one embodiment.

[0220] As shown in Figure 29 , for example, at least a portion of the second latch 252 is located within the second receiving space 16 of the spindle 1. The second latch 252 is spaced apart from the first latch 251. The second latch 252 is movably connected to the spindle 1. For example, the second latch 252 is slidably connected to the spindle 1. It will be appreciated that Figure 29 conceals the upper cover 12 of the spindle 1 to more clearly illustrate the positional relationship between the second latch 252, the synchronizing gear 253, and other components.

[0221] It is understood that the cooperation between the base 11 and the upper cover 12 can limit the second latch 252 in the X-axis and Z-axis directions, and allow the second latch 252 to slide relative to the spindle 1 in the Y-axis direction. For example, the right side of the base 11 cooperates with the first and second limit blocks 117 and 118 to limit the second latch 252 in the X-axis direction. The bottom of the base 11 cooperates with the upper cover 12 to limit the second latch 252 in the Z-axis direction.

[0222] For example, the first connection end 231 and the third connection end 241 are arranged along the Y-axis, the first latch 251 and the second latch 252 are located between the first connection end 231 and the third connection end 241, and the first latch 251 and the second latch 252 are arranged along the X-axis. In this way, the first connection end 231, the third connection end 241, the first latch 251, and the second latch 252 are arranged compactly on the spindle 1, improving space utilization. It will be appreciated that there are two scenarios for arranging the first latch 251 and the second latch 252 along the X-axis. In one scenario, the majority of the first latch 251 and the majority of the second latch 252 are arranged along the X-axis, with a small portion of the first latch 251 and the small portion of the second latch 252 overlapping in the Y-axis. In another scenario, the entire first latch 251 and the entire second latch 252 are arranged along the X-axis.

[0223] Exemplarily, the second body portion 2521 of the second latch 252 is movably connected to the spindle 1. The top surface 2527 of the second body portion 2521 of the second latch 252 faces the same direction as the back surface 11e of the base 11 of the spindle 1. It is understood that the second body portion 2521 is disposed between the bottom of the base 11 and the upper cover 12. The bottom of the base 11 and the upper cover 12 cooperate to limit the second body portion 2521 in the Z-axis direction. In addition, the second body portion 2521 is disposed between the right side of the base 11 and the first limit block 117 and the second limit block 118. The right side of the base 11 cooperates with the first limit block 117 and the second limit block 118 to limit the second body portion 2521 in the X-axis direction.

[0224] Exemplarily, the second plug portion 2522 of the second latch 252 is disposed toward the second connecting arm 24. The protrusion 2523 is located between the second body portion 2521 and the upper cover 12 (see FIG. 26). In addition, the second engagement portion 2524 is located between the second limiting portion 2525 and the bottom of the base 11.

[0225] As shown in Figure 29, the synchronous gear 253 is located on the main shaft 1 and is rotatably connected to the rotating shaft 116 of the base 11. For example, the synchronous gear 253 can be sleeved on the rotating shaft 116 of the base 11. In this case, a portion of the synchronous gear 253 can be located in the first accommodating space 15, and a portion can be located in the second accommodating space 16.

[0226] As shown in FIG29 , the first latch 251, the second latch 252, and the synchronous gear 253 are all located in the accommodating space 150. The synchronous gear 253 can mesh with the first meshing portion 2514 of the first latch 251 or the second meshing portion 2524 of the second latch 252 (see FIG28 , which illustrates the second meshing portion 2524 from another angle). In other words, the second meshing portion 2524 meshes with the first meshing portion 2514 via the synchronous gear 253.

[0227] For example, a portion of the synchronization gear 253 is located between the first stopper 2515 of the first latch 251 and the bottom of the base 11. A portion of the synchronization gear 253 is located between the second stopper 2525 of the second latch 252 and the bottom of the base 11. Thus, the bottom of the base 11 cooperates with the first stopper 2515 of the first latch 251 and the second stopper 2525 of the second latch 252 to limit the synchronization gear 253 in the Z-axis direction.

[0228] It is understandable that when the electronic device 1000 is in the unlocked state, the second connecting arm 24 may no longer rotate relative to the main shaft 1. When the electronic device 1000 is in the locked state, the second connecting arm 24 may also rotate relative to the main shaft 1.

[0229] As shown in FIG29 , when the second latch 252 is in the unlocked state, at least a portion of the second plug-in portion 2522 of the second latch 252 is not inserted into the second slot 2411 of the second connecting arm 24. That is, at least a portion of the second plug-in portion 2522 of the second latch 252 is located outside the second slot 2411 of the second connecting arm 24. At this time, the second connecting arm 24 can rotate relative to the main shaft 1 under external force.

[0230] For example, when the main shaft 1 is provided with a second avoidance groove 114, a portion of the second plug-in portion 2522 of the second pin 252 may not be inserted into the second avoidance groove 114 of the main shaft 1 (Figure 10 also illustrates the structure of the second avoidance groove 114, please refer to Figure 10 for details), that is, a portion of the second plug-in portion 2522 of the second pin 252 is located outside the second avoidance groove 114.

[0231] Figure 30 is a schematic structural diagram of an embodiment of the folding mechanism 100 shown in Figure 29. It is understood that in order to more clearly illustrate the positional relationship and connection relationship between the first latch 251, the second latch 252, the synchronization gear 253 and other components, Figure 30 hides the upper cover 12.

[0232] As shown in Figure 30, when the second latch 252 is in the locked state, at least a portion of the second plug portion 2522 of the second latch 252 is inserted into the second slot 2411 of the second connecting arm 24. At this time, the second connecting arm 24 can no longer rotate relative to the main shaft 1 under external force.

[0233] Exemplarily, when the main shaft 1 is provided with the second avoidance groove 114 , a portion of the second plug-in portion 2522 of the second latch 252 is also inserted into the second avoidance groove 114 of the main shaft 1 .

[0234] As shown in Figures 29 and 30, when the electronic device 1000 switches from the locked state to the unlocked state, a force along the positive direction of the Y-axis can be applied to the pushing portion 2513 of the first latch 251 (for example, the pushing portion 2513 is moved along the positive direction of the Y-axis). The first latch 251 slides relative to the main shaft 1 along the positive direction of the Y-axis, causing the synchronous gear 253 to rotate clockwise. The second engaging portion 2524 of the second latch 252 (see Figure 28) rotates with the synchronous gear 253, and the second latch 252 slides relative to the main shaft 1 along the negative direction of the Y-axis. The second plug-in portion 2522 of the second latch 252 can extend from the second slot 2411 of the second connecting arm 24 along the negative direction of the Y-axis.

[0235] As shown in Figures 29 and 30, when the electronic device 1000 switches from the unlocked state to the locked state, a force along the negative direction of the Y-axis can be applied to the pushing portion 2513 of the first latch 251 (for example, the pushing portion 2513 is moved along the negative direction of the Y-axis). The first latch 251 slides relative to the main shaft 1 along the negative direction of the Y-axis, causing the synchronous gear 253 to rotate counterclockwise. The second engaging portion 2524 of the second latch 252 (see Figure 28) rotates with the synchronous gear 253, and the second latch 252 slides relative to the main shaft 1 along the positive direction of the Y-axis. The second plug-in portion 2522 of the second latch 252 can be inserted into the second slot 2411 of the second connecting arm 24 along the positive direction of the Y-axis.

[0236] It is understood that the second latch 252 is driven relative to the spindle 1 by driving the first latch 251 along the Y-axis, and then using the synchronous gear 253 to synchronously drive the second latch 252 along the Y-axis. In other embodiments, the structure of the second latch 252 can also adopt the structure of the first latch 251. In this case, the user can directly move the second latch 252 to move it along the Y-axis. Alternatively, the drive mechanism can directly drive the first latch 251 along the Y-axis.

[0237] It will be appreciated that, by disposing the second latch 252 within the main shaft 1, the present application allows at least a portion of the second plug-in portion 2522 of the second latch 252 to be inserted into the second slot of the second connecting arm 24 when the electronic device 1000 is in the flattened state. This prevents the second connecting arm 24 from rotating relative to the main shaft 1. The second fixing frame 22 also stops rotating relative to the main shaft 1. At this point, the main shaft 1, first fixing frame 21, and second fixing frame 22 can be maintained at a certain angle, such as 180°. This improves the stability and reliability of the folding mechanism 100 in the flattened state.

[0238] It will be appreciated that in this embodiment, by providing a synchronization gear 253 between the first latch 251 and the second latch 252, the synchronization gear 253 simultaneously drives the second latch 252 along the Y-axis while driving the first latch 251 in the Y-axis direction. Thus, this embodiment can achieve synchronized movement of the first latch 251 and the second latch 252 using a single driving force. The first latch 251 and the second latch 252 are respectively inserted into the first connecting arm 23 and the second connecting arm 24. The structure of the plug assembly 25 in this embodiment is relatively simple, reducing assembly difficulty and manufacturing costs. Furthermore, when the electronic device 1000 is in the locked state, the first latch 251 and the second latch 252 can be simultaneously inserted into the first connecting arm 23 and the second connecting arm 24, respectively. Compared to solutions in which the first latch 251 is separately inserted into the first connecting arm 23 or the second latch 252 is separately inserted into the second connecting arm 24, the first fixing frame 21 and the second fixing frame 22 are less likely to rotate relative to the main shaft 1. The main shaft 1, the first fixing frame 21 and the second fixing frame 22 can be better maintained at a certain angle, such as 180°, so that the stability and reliability of the flattened state of the folding mechanism 100 are better.

[0239] It will be appreciated that, by providing a second relief groove 114 within the second arcuate groove 14, the present application allows a portion of the second plug-in portion 2522 of the second latch 252 to be inserted into the second relief groove 114 when the electronic device 1000 is in the flattened state. The second relief groove 114 can be used to prevent the second latch 252 from interfering with the bottom wall of the second arcuate groove 14. Furthermore, the second relief groove 114 can also, to a certain extent, limit the position of the second latch 252 in the X-axis direction, thereby enhancing the stability of the second latch 252.

[0240] FIG31 is a partial structural diagram of the folding mechanism 100 shown in FIG8 at another angle in one embodiment, wherein FIG31 illustrates the assembly structure of the spring 254 fixed to the upper cover 12 .

[0241] As shown in Figure 31, the spring piece 254 includes a first straight portion 2541, a bent portion 2542, and a second straight portion 2543 connected in sequence. In other words, the bent portion 2542 is connected between the first straight portion 2541 and the second straight portion 2543. For example, the surface of the bent portion 2542 can be a curved surface or an arc surface.

[0242] As shown in FIG31 , for example, the first straight portion 2541 and the second straight portion 2543 of the spring piece 254 are both fixed to the side of the upper cover 12 facing the accommodating space 150. The bent portion 2542 of the spring piece 254 protrudes away from the upper cover 12. In other words, the bent portion 2542 of the spring piece 254 protrudes in a direction closer to the second latch 252.

[0243] Exemplarily, the first straight portion 2541 and the second straight portion 2543 of the elastic piece 254 may be fixed to the upper cover 12 by means of gluing, welding, or the like.

[0244] Illustratively, the first straight portion 2541 and the second straight portion 2543 of the spring piece 254 are located within the receiving groove 125 of the upper cover 12. Illustratively, the first straight portion 2541 and the second straight portion 2543 of the spring piece 254 are fixed to the bottom wall of the receiving groove 125. Thus, in the Z-axis direction, the spring piece 254 and the upper cover 12 have an overlapping area, which can improve space utilization.

[0245] FIG32 is a seventh schematic diagram of a partial structure of the folding mechanism 100 shown in FIG8 in one embodiment.

[0246] As shown in FIG. 31 and FIG. 32 , when the upper cover 12 (see FIG. 31 ) is fixed to the base 11 , the bent portion 2542 of the elastic piece 254 protrudes toward the direction close to the second latch 252 .

[0247] As shown in Figures 31 and 32, when the electronic device 1000 is in the unlocked state, that is, when the first latch 251 is separated from the first slot 2311, the protrusion 2523 of the second latch 252 can be located on the side of the bent portion 2542 of the spring 254 away from the third connection end 241 of the second connecting arm 24. The bent portion 2542 of the spring 254 can be used to block the second latch 252 from moving toward the second connecting arm 24. This prevents the second connecting arm 24 from being unable to rotate due to the second insertion portion 2522 of the second latch 252 being inserted into the second slot 2411 during rotation of the second connecting arm 24, thereby ensuring that the second connecting arm 24 can rotate relative to the main shaft 1. It can be understood that because the bent portion 2542 of the spring 254 can block the second latch 252 from moving toward the second connecting arm 24, the second latch 252 does not drive the synchronous gear 253 to rotate. The synchronous gear 253 will not drive the first latch 251 to move in the direction close to the first connecting arm 23, thereby preventing the first connecting arm 23 from being unable to rotate due to the insertion portion of the first latch 251 into the first slot 2311 during the rotation of the first connecting arm 23, that is, ensuring that the first connecting arm 23 can rotate relative to the main shaft 1.

[0248] Fig. 33 is a schematic structural diagram of an embodiment of the folding mechanism 100 shown in Fig. 32. It is understood that in order to more clearly illustrate the connection relationship between the plug assembly 25 and other components, Figs. 32 and 33 hide the upper cover 12.

[0249] As shown in FIG33 , when the electronic device 1000 is in the locked state (i.e., when the first latch 251 is inserted into the first slot 2311), the protrusion 2523 of the second latch 252 can be located on the side of the bent portion 2542 of the spring 254 near the third connection end 241 of the second connecting arm 24. The bent portion 2542 of the spring 254 can block the second latch 252 from moving away from the second connecting arm 24, thereby restricting the second plug-in portion 2522 of the second latch 252 from disengaging from the second slot 2411, ensuring that the second connecting arm 24 no longer rotates relative to the spindle 1, and improving the reliability of the connection between the second latch 252 and the second connecting arm 24. It will be appreciated that because the bent portion 2542 of the spring 254 blocks the second latch 252 from moving away from the second connecting arm 24, the second latch 252 does not drive the synchronous gear 253 to rotate. The synchronous gear 253 will not drive the first latch 251 to move in a direction away from the first connecting arm 23, thereby limiting the first plug-in portion 2512 of the first latch 251 from being disengaged from the first slot 2311, thereby ensuring that the first connecting arm 23 no longer rotates relative to the main shaft 1, thereby improving the connection reliability between the first latch 251 and the first connecting arm 23.

[0250] It is understood that when the electronic device 1000 switches from the locked state to the unlocked state, the second latch 252 slides relative to the spindle 1 along the negative direction of the Y-axis, and the protrusion 2523 of the second latch 252 passes over the bent portion 2542 of the spring 254 and moves from the side of the bent portion 2542 of the spring 254 close to the second connecting arm 24 to the side of the bent portion 2542 of the spring 254 away from the second connecting arm 24. When the electronic device 1000 switches from the unlocked state to the locked state, the second latch 252 slides relative to the spindle 1 along the positive direction of the Y-axis, and the protrusion 2523 of the second latch 252 passes over the bent portion 2542 of the spring 254 and moves from the side of the bent portion 2542 of the spring 254 away from the second connecting arm 24 to the side of the bent portion 2542 of the spring 254 close to the second connecting arm 24. Since the spring piece 254 is deformable, the spring piece 254 releases space by deformation, so that the protrusion 2523 of the second latch 252 can pass over the bent portion 2542 of the spring piece 254 .

[0251] It will be appreciated that the above embodiment describes one configuration for restricting the movement of the second latch 252 when the plug assembly 25 is in the locked or unlocked state. In other embodiments, restricting the movement of the second latch 252 when the plug assembly 25 is in the locked or unlocked state can be accomplished in a variety of ways, and the specific embodiments are not limited herein. For example, the second latch 252 may not include the protrusion 2523. In this case, the bent portion 2542 of the spring 254 can abut against the main body of the second latch 252. The spring 254 can apply pressure along the Z-axis to the second latch 252, thereby increasing the friction between the second latch 252 and the base 11. Thus, when the plug assembly 25 is in the locked state, the bent portion 2542 of the spring 254 can prevent the second latch 252 from moving away from the second connecting arm 24, thereby restricting the second plug portion 2522 of the second latch 252 from disengaging from the second slot 2411 and ensuring that the second connecting arm 24 no longer rotates relative to the spindle 1. When the plug-in assembly 25 is in the unlocked state, the bent portion 2542 of the spring 254 can be used to block the second latch 252 from moving in the direction close to the second connecting arm 24, thereby preventing the second connecting arm 24 from being unable to rotate due to the plug-in portion of the second latch 252 being inserted into the second slot 2411 during the rotation of the second connecting arm 24, thereby ensuring that the second connecting arm 24 can rotate relative to the main shaft 1.

[0252] It is understood that the above embodiment describes a configuration in which, when the electronic device 1000 is in a locked or unlocked state, the movement of the second latch 252 is restricted by the spring clip 254, and the movement of the first latch 251 is restricted by the cooperation of the second latch 252, the synchronization gear 253, and the first latch 251. In other embodiments, when the synchronization gear 253 is not provided, another spring clip 254 can be directly provided on the first latch 251, and the cooperation of the other spring clip 254 with the first latch 251 can be directly utilized to restrict the movement of the first latch 251. The structural configuration of the other spring clip 254 and the first latch 251 can refer to the structure of the second latch 252 and the spring clip 254. The specific details are not described in detail in this application.

[0253] Figure 34 is a partially exploded view of the first damping member 26a and the second damping member 26b shown in Figure 16. Figure 35 is an enlarged view of the first damping member 26a, the second damping member 26b, the third damping member 26c and the fourth damping member 26d shown in Figure 16.

[0254] As shown in Figures 34 and 35, the first damping member 26a includes a first bracket 261a and a first elastic member 262a. The first bracket 261a is a rigid structure, so it is not easily deformed under the action of external forces. For example, the first bracket 261a includes multiple first fixing columns 263a, a first abutting block 264a, and two first sliding blocks 265a. The multiple first fixing columns 263a are fixed to one side of the first abutting block 264a at intervals. The two first sliding blocks 265a are fixed to one side of the first abutting block 264a at intervals. The multiple first fixing columns 263a are located between the two first sliding blocks 265a.

[0255] Exemplarily, the first elastic member 262a may include a plurality of springs. The number of springs may be the same as the number of first fixing posts 263a. The plurality of springs are sleeved on the plurality of first fixing posts 263a in a one-to-one correspondence. Exemplarily, one end of the spring may abut against the first abutting block 264a of the first bracket 261a. It is understood that the number of first fixing posts 263a and springs is not limited to the two illustrated in FIG16 . In other embodiments, the number of first fixing posts 263a and springs is not strictly limited. In other embodiments, one end of the spring may also be fixed to the first abutting block 264a of the first bracket 261a by welding or other means.

[0256] It is understood that the second damping member 26b and the first damping member 26a can have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the second damping member 26b and the first damping member 26a are symmetrical structures. The basic design of the second damping member 26b's component structure, the design of the connection relationships between the components, and the design of the connection relationships between the components and other structures outside the assembly can refer to the relevant embodiments of the first damping member 26a. At the same time, the second damping member 26b and the first damping member 26a can differ slightly in the detailed structure or position arrangement of the components. For example, the second damping member 26b includes a second bracket 261b and a second elastic member 262b. The second bracket 261b has a rigid structure, which makes it less susceptible to deformation under external forces. Exemplarily, the second bracket 261b has multiple second fixing columns 263b spaced apart. Exemplarily, the second elastic member 262b may include multiple springs. The multiple springs are mounted on the multiple second fixing columns 263b in a one-to-one correspondence.

[0257] It is understandable that the structure of the third damping member 26c is similar or identical to that of the first damping member 26a, and the structure of the fourth damping member 26d is similar or identical to that of the second damping member 26b, and similar contents are not repeated here.

[0258] FIG36 is a partial structural schematic diagram eight of the folding mechanism 100 shown in FIG8 in one embodiment.

[0259] 36 , the first damping member 26a is located on the first fixing frame 21 . For example, the first damping member 26a may be located on a side of the slider 212 close to the first protrusion 214a and at least partially between the two first guide rail blocks 213a of the first fixing frame 21 .

[0260] Exemplarily, the first bracket 261a of the first damping member 26a is slidably connected to the first fixing frame 21. Exemplarily, the two first sliding blocks 265a of the first bracket 261a can be respectively located in the first guide grooves 218a (see Figure 17) of the two first guide rail blocks 213a. The first bracket 261a can slide in the first guide grooves 218a of the two first guide rail blocks 213a.

[0261] For example, the two first elastic members 262a of the first damping member 26a are mounted one-to-one on the two first guide posts 215a (see FIG. 17 ) of the first fixing frame 21. The other ends of the first elastic members 262a abut against the first protrusion 214a of the first fixing frame 21. In other embodiments, the other ends of the first elastic members 262a can also be fixed to the first protrusion 214a of the first fixing frame 21 by welding or other means.

[0262] Exemplarily, the first abutting block 264a of the first bracket 261a of the first damping member 26a abuts against the second connecting end 232 of the first connecting arm 23. The first elastic member 262a is used to apply a damping force to the second connecting end 232 through the first bracket 261a to limit the first connecting arm 23.

[0263] For example, the contact position between the first bracket 261a and the second connecting end 232 of the first connecting arm 23 can be an inclined surface. In this way, the first bracket 261a, under the action of the first elastic member 262a, can apply a force along the positive direction of the X-axis to the first connecting arm 23. In other words, the first damping member 26a can provide a pre-tightening force to the first connecting arm 23, thereby preventing the first connecting arm 23 from rotating easily relative to the main shaft 1 in the absence of external force.

[0264] As shown in Figure 36 , the second damping member 26b is located on the first fixing frame 21. The second damping member 26b can be located on the side of the slider 212 near the second protrusion 214b, and at least partially between the two second guide rail blocks 213b of the first fixing frame 21. It is understood that the connection method between the second damping member 26b and the first fixing frame 21 can be similar to the connection method between the first damping member 26a and the first fixing frame 21. The specific details of this embodiment are not further described.

[0265] Furthermore, the second damping member 26b abuts against the second connecting end 232 of the first connecting arm 23. The second damping member 26b can be located on a side of the first connecting arm 23 away from the first damping member 26a. The second damping member 26b can apply a damping force to the first connecting arm 23, that is, the second damping member 26b can also provide a preload force to the first connecting arm 23, thereby further limiting the first connecting arm 23 from easily rotating relative to the main shaft 1 in the absence of external force. The mating relationship between the second damping member 26b and the first connecting arm 23 can be referred to as the mating relationship between the first damping member 26a and the first connecting arm 23. The details will not be repeated here.

[0266] Illustratively, the first damping member 26a and the second damping member 26b jointly resist the second connecting end 232 of the first connecting arm 23, so that the first connecting arm 23 and the first fixing frame 21 can maintain a preset relative position relationship when not subject to a large external force, the folding mechanism 100 can stay at a preset angle, and the rotating device can maintain a flattened state or a folded state, so as to improve the user experience of the folding mechanism 100 and the electronic device 1000.

[0267] It is understood that when the electronic device 1000 is folded or unfolded frequently, the damping force of the springs of the first damping member 26a and the second damping member 26b decreases, weakening the ability to hold the first connecting arm 23 in place. When the electronic device 1000 is in the flattened state, the first fixing frame 21 cannot maintain the preset relative positional relationship even without significant external force. A significant angle, such as 150°, 155°, or 160°, may exist between the first fixing frame 21 and the second fixing frame 22. In the present application, by providing a first latch 251, a second latch 252, and a synchronization gear 253, when the first latch 251 and the second latch 252 are in the locked state, the first connecting arm 23 and the second connecting arm 24 no longer rotate relative to the main shaft 1 even without significant external force. Neither the first fixing frame 21 nor the second fixing frame 22 rotate relative to the main shaft 1. At this point, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can maintain a certain angle, such as 180°. The folding mechanism 100 has better stability and reliability in the flattened state.

[0268] As shown in Figure 36, the third damper 26c and the fourth damper 26d are both located on the second fixing bracket 22. The third damper 26c and the fourth damper 26d can be located on either side of the second connecting arm 24. The third damper 26c and the fourth damper 26d both abut against the fourth connecting end 242 of the second connecting arm 24. The third damper 26c and the fourth damper 26d can apply a force along the positive X-axis direction to the second connecting arm 24. In other words, the third damper 26c and the fourth damper 26d can provide a preload force on the second connecting arm 24, further limiting the second connecting arm 24 from rotating relative to the main shaft 1 in the absence of external force. It should be understood that the coordination relationship between the third damper 26c, the fourth damper 26d, the second fixing bracket 22, and the second connecting arm 24 can be referred to as the coordination relationship between the first damper 26a, the second damper 26b, and the first connecting arm 23. The details will not be repeated here.

[0269] It is understood that when the electronic device 1000 is folded or unfolded a large number of times, the damping force of the springs of the third damper 26c and the fourth damper 26d decreases, weakening the ability to hold the second connecting arm 24 in place. When the electronic device 1000 is in the flattened state, the second fixing frame 22 cannot maintain the preset relative position even without significant external force. A significant angle, such as 150°, 155°, or 160°, may exist between the first fixing frame 21 and the second fixing frame 22. In the present application, by providing a first latch 251, a second latch 252, and a synchronization gear 253, when the first latch 251 and the second latch 252 are in the locked state, the first connecting arm 23 and the second connecting arm 24 no longer rotate relative to the main shaft 1 even without significant external force. Neither the first fixing frame 21 nor the second fixing frame 22 rotate relative to the main shaft 1. At this point, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can maintain a certain angle, such as 180°. The folding mechanism 100 has better stability and reliability in the flattened state.

[0270] Fig. 37 is an exploded view of the electronic device 1000 shown in Fig. 6 from another angle in one embodiment. Fig. 38 is a structural diagram of the electronic device 1000 shown in Fig. 37 in a locked state.

[0271] As shown in Figures 37 and 38, the first fixing frame 21 is fixed to the first shell 300. The second fixing frame 22 is fixed to the second shell 400. For example, the first shell 300 can be connected to the first shell 300 by screws. The second shell 400 can be connected to the second shell 400 by screws. It can be understood that in this embodiment, since the first connecting arm 23 is connected to the first fixing frame 21 and the first fixing frame 21 is fixed to the first shell 300, the first connecting arm 23 is connected to the first shell 300 through the first fixing frame 21. In other embodiments, the folding mechanism 100 may not be provided with the first fixing frame 21. In this case, the first connecting arm 23 is directly connected to the first shell 300. Similarly, in other embodiments, the second connecting arm 24 is directly connected to the second shell 400. This application does not limit this in detail.

[0272] As shown in Figures 37 and 38, when the electronic device 1000 switches from the flattened state to the folded state, the first housing 300 and the second housing 400 move closer to each other, and the first housing 300 can drive the first fixing frame 21 to rotate relative to the main axis 1 via the first connecting arm 23, and the second housing 400 can drive the second fixing frame 22 to rotate relative to the main axis 1 via the second connecting arm 24. Specifically, during the rotation of the first fixing frame 21 and the second fixing frame 22 relative to the main axis 1, the first fixing frame 21 also slides relative to the first connecting arm 23, and the first fixing frame 21 and the first housing 300 move toward the direction of the main axis 1, and the second fixing frame 22 also slides relative to the second connecting arm 24, and the second fixing frame 22 and the second housing 400 move toward the direction of the main axis 1.

[0273] As shown in Figures 37 and 38, when the electronic device 1000 switches from the folded state to the flattened state, the first housing 300 and the second housing 400 open to each other, and the first housing 300 can drive the first fixing frame 21 to rotate relative to the main axis 1 via the first connecting arm 23, and the second housing 400 can drive the second fixing frame 22 to rotate relative to the main axis 1 via the second connecting arm 24. Specifically, during the rotation of the first fixing frame 21 and the second fixing frame 22 relative to the main axis 1, the first fixing frame 21 also slides relative to the first connecting arm 23, and the first fixing frame 21 and the first housing 300 move in a direction away from the main axis 1. The second fixing frame 22 also slides relative to the second connecting arm 24, and the second fixing frame 22 and the second housing 400 move in a direction away from the main axis 1.

[0274] Referring to Figure 37 and in conjunction with Figure 36 , in one embodiment, electronic device 1000 includes a first damping member 26a, a second damping member 26b, a third damping member 26c, and a fourth damping member 26d. When electronic device 1000 is folded or unfolded frequently, the damping force of the springs of first damping member 26a and second damping member 26b decreases, weakening the ability to restrain first connecting arm 23. The damping force of the springs of third damping member 26c and fourth damping member 26d decreases, weakening the ability to restrain second connecting arm 24. Furthermore, due to the long-term static state of electronic device 1000 in its folded state, the rewinding force of flexible screen 200 is relatively large. It is understood that the rewinding force may be the internal stress within flexible screen 200 that causes it to return to its folded state. Thus, when the electronic device 1000 is in the flattened state, due to the retraction force of the flexible screen 200, the flexible screen 200 overcomes the relatively small elastic forces of the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d, thereby driving the first housing 300 and the second housing 400 toward each other. The first housing 300 can drive the first fixing frame 21 to rotate relative to the main axis 1 via the first connecting arm 23, and the second housing 400 can drive the second fixing frame 22 to rotate relative to the main axis 1 via the second connecting arm 24. At this time, when the electronic device 1000 is in the flattened state, the first housing 300 and the second housing 400 cannot maintain the preset relative positional relationship (for example, the first housing 300 and the second housing 400 remain at a 180° angle), resulting in the electronic device 1000 exhibiting a hunched back (unflattened) phenomenon. For example, a significant angle between the first housing 300 and the second housing 400 may exist, such as 150°, 155°, or 160°. In an embodiment, by providing a first latch 251, a second latch 252, and a synchronization gear 253 within the main shaft 1, when the electronic device 1000 is in a flattened state, the first latch 251 can be inserted into the first slot 2311 of the first connecting arm 23, and the second latch 252 can be inserted into the second slot 2411 of the second connecting arm 24. At this point, even if the flexible screen 200 applies a force to the first shell 300 and the second shell 400 to move toward each other, the first connecting arm 23 and the second connecting arm 24 no longer rotate relative to the main shaft 1, the first fixing frame 21 and the second fixing frame 22 no longer rotate relative to the main shaft 1, and the first shell 300 and the second shell 400 no longer rotate relative to the main shaft 1. At this point, the first shell 300 and the second shell 400 can remain in a preset relative position (for example, the first shell 300 and the second shell 400 remain at a 180° angle). When the electronic device 1000 is in a flattened state, the electronic device 1000 is more aesthetically pleasing.

[0275] It is understood that if the folding mechanism 100 includes the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d, the user can choose whether to insert the first latch 251 into the first slot 2311 when the electronic device 1000 is in the flat state. For example, when the electronic device 1000 has been folded or unfolded a few times, the damping forces of the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d are normal, so that the first damping member 26a and the second damping member 26b can normally apply the damping force to the first connecting arm 23, and the third damping member 26c and the fourth damping member 26d can normally apply the damping force to the second connecting arm 24. At this time, the first damper 26a, the second damper 26b, the third damper 26c, and the fourth damper 26d can lock the first connecting arm 23 and the second connecting arm 24 from rotating, so the user does not need to insert the first latch 251 into the first slot 2311 when the electronic device 1000 is in the flat state. When the electronic device 1000 is folded or unfolded a large number of times, the damping forces of the first damper 26a, the second damper 26b, the third damper 26c, and the fourth damper 26d are ineffective, so that the first damper 26a and the second damper 26b cannot apply a damping force to the first connecting arm 23, and the third damper 26c and the fourth damper 26d cannot apply a damping force to the second connecting arm 24. At this time, the first damper 26a, the second damper 26b, the third damper 26c and the fourth damper 26d cannot lock the first connecting arm 23 and the second connecting arm 24 from rotating, and the user can insert the first pin 251 into the first slot 2311 when the electronic device 1000 is in a flat state.

[0276] Referring to FIG. 37 and in conjunction with FIG. 36 , in another case, when the electronic device 1000 does not include the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d, in this embodiment, by disposing the plug-in assembly 25 within the main shaft 1, when the electronic device 1000 is in a flattened state, on the one hand, a locking method can be provided for the first connecting arm 23 and the second connecting arm 24, so that the first shell 300 and the second shell 400 can be maintained in a preset relative position. On the other hand, this can solve the problem that the first shell 300 and the second shell 400 cannot be maintained in the preset relative position (for example, the first shell 300 and the second shell 400 are maintained at 180°) due to the rewinding force of the flexible screen 200, that is, the electronic device 1000 will have a flattened hunchback phenomenon.

[0277] First, a locking method for the first connecting arm 23 and the second connecting arm 24 is provided. When the electronic device 1000 is in a flattened state, the first latch 251 of the plug-in assembly 25 can be inserted into the first slot 2311 of the first connecting arm 23, and the second latch 252 can be inserted into the second slot 2411 of the second connecting arm 24. In this way, the first connecting arm 23 and the second connecting arm 24 no longer rotate relative to the main shaft 1, the first fixing frame 21 and the second fixing frame 22 no longer rotate relative to the main shaft 1, and the first shell 300 and the second shell 400 no longer rotate relative to the main shaft 1. The first shell 300 and the second shell 400 can be maintained in a preset relative position (for example, the first shell 300 and the second shell 400 are maintained at a 180° angle). At this time, when the electronic device 1000 is in a flattened state, the electronic device 1000 is more beautiful.

[0278] Second, address the issue of the electronic device 1000 experiencing a flattened hunchback phenomenon. It's understandable that when the electronic device 1000 remains folded and stationary for an extended period, the flexible screen 200 experiences a significant retraction force. Consequently, when the electronic device 1000 is in the flattened state, the retraction force of the flexible screen 200 directly pulls the first and second housings 300 and 400 toward each other. The first housing 300 can drive the first fixing frame 21 to rotate relative to the main axis 1 via the first connecting arm 23, and the second housing 400 can drive the second fixing frame 22 to rotate relative to the main axis 1 via the second connecting arm 24. In this case, when the electronic device 1000 is in the flattened state, the first and second housings 300 and 400 cannot maintain their predetermined relative positions (e.g., the first and second housings 300 and 400 are positioned at 180°), resulting in the electronic device 1000 experiencing a flattened hunchback phenomenon. For example, a significant angle between the first and second housings 300 and 400 can be 150°, 155°, or 160°, etc. In an embodiment, when the electronic device 1000 is in a flattened state, the first latch 251 can be inserted into the first slot 2311 of the first connecting arm 23, and the second latch 252 can be inserted into the second slot 2411 of the second connecting arm 24. At this time, even if the flexible screen 200 applies a force to the first shell 300 and the second shell 400 to move closer to each other, the first connecting arm 23 and the second connecting arm 24 no longer rotate relative to the main axis 1, the first fixing frame 21 and the second fixing frame 22 no longer rotate relative to the main axis 1, and the first shell 300 and the second shell 400 no longer rotate relative to the main axis 1. At this time, the first shell 300 and the second shell 400 can be maintained in a preset relative position (for example, the first shell 300 and the second shell 400 are maintained at 180°). When the electronic device 1000 is in a flattened state, the electronic device 1000 is more beautiful.

[0279] FIG39 is a schematic diagram of a partial structure of the electronic device 1000 shown in FIG6 at another angle in one embodiment.

[0280] As shown in Figure 39 , the first shielding plate 4a is connected to the folding mechanism 100. For example, the first shielding plate 4a can be fixedly connected to the second connecting end 232 (see Figure 36 ) of the first connecting arm 23 (see Figure 36 ). For example, a portion of the first shielding plate 4a shields the side of the folding mechanism 100 that is closest to the first housing 300. The first shielding plate 4a can be flush with the first housing 300, enhancing the aesthetics and overall integrity of the electronic device 1000.

[0281] As shown in Figure 39 , the second shielding plate 4b is connected to the folding mechanism 100. For example, the second shielding plate 4b can be fixedly connected to the fourth connecting end 242 (see Figure 36) of the second connecting arm 24 (see Figure 36). For example, a portion of the second shielding plate 4b shields the side of the folding mechanism 100 that is closest to the second housing 400. The second shielding plate 4b can be flush with the second housing 400, enhancing the aesthetics and overall integrity of the electronic device 1000.

[0282] It can be understood that when the folding mechanism is in the flattened state, the first shielding plate 4a and the second shielding plate 4b are located on the same side of the first fixed frame 21, the main shaft 1 and the second fixed frame 22, and the first shielding plate 4a and the second shielding plate 4b jointly cover the first fixed frame 21, the main shaft 1 and the second fixed frame 22.

[0283] As shown in Figure 39, the second shielding plate 4b is provided with a second avoidance hole 41b. The second avoidance hole 41b is provided through the second shielding plate 4b.

[0284] Exemplarily, the second avoidance hole 41 b is disposed opposite to the first avoidance hole 123 (see FIG. 26 ) of the upper cover 12 .

[0285] For example, a portion of the push portion 2513 of the first latch 251 passes through the second avoidance hole 41b of the second shielding plate 4b and extends to the side of the second shielding plate 4b away from the main shaft 1. In other words, a portion of the push portion 2513 of the first latch 251 extends outside the electronic device 1000. It will be appreciated that when a user moves the push portion 2513 of the first latch 251, the push portion 2513 that partially extends outside the electronic device 1000 is more convenient to operate, allowing the user to more easily and accurately switch between the unlocked and locked states of the electronic device 1000, thus broadening its applicability and providing a better user experience.

[0286] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0287] It should be noted that all the above drawings are illustrative illustrations of this application and do not represent the actual size of the product. The dimensional ratio relationship between the components in the drawings does not serve as a limitation on the actual product of this application. The above are only some of the embodiments and implementation methods of this application. The scope of protection of this application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in this application can easily think of changes or replacements, which should be covered by the scope of protection of this application. Therefore, the scope of protection of this application shall be based on the scope of protection of the claims.

Claims

1. A folding mechanism (100), characterized in that: It comprises a main shaft (1), a first fixing frame (21), a second fixing frame (22), a first connecting arm (23), a second connecting arm (24) and a first latch (251), wherein the main shaft (1) is located between the first fixing frame (21) and the second fixing frame (22); The first connecting arm (23) comprises a first connecting end (231) and a second connecting end (232), the first connecting end (231) being connected to the main shaft (1), the second connecting end (232) being connected to the first fixing frame (21), and the first connecting end (231) being provided with a first slot (2311); The second connecting arm (24) comprises a third connecting end (241) and a fourth connecting end (242), the third connecting end (241) being connected to the main shaft (1), and the fourth connecting end (242) being connected to the second fixing frame (22); The first latch (251) is located on the main shaft (1) and is movably connected to the main shaft (1); the first latch (251) is used to be inserted into the first slot (2311) when the folding mechanism (100) is in a flattened state.

2. The folding mechanism (100) according to claim 1, characterized in that: The third connection end (241) is provided with a second slot (2411); The folding mechanism (100) comprises a second latch (252), the second latch (252) being located on the main shaft (1) and spaced apart from the first latch (251), the second latch (252) being movably connected to the main shaft (1), and the second latch (252) being configured to be inserted into the second slot (2411) when the folding mechanism (100) is in a flattened state.

3. The folding mechanism (100) according to claim 2, characterized in that: The first latch (251) has a first meshing portion (2514), and the second latch (252) has a second meshing portion (2524); The folding mechanism (100) comprises a synchronous gear (253), wherein the synchronous gear (253) is located on the main shaft (1) and is rotationally connected to the main shaft (1), and the second meshing portion (2524) meshes with the first meshing portion (2514) through the synchronous gear (253).

4. The folding mechanism (100) according to claim 3, characterized in that: The first latch (251) has a first limiting portion (2515), the second latch (252) has a second limiting portion (2525), a portion of the synchronous gear (253) is located between the first limiting portion (2515) and the main shaft (1), and a portion of the synchronous gear (253) is located between the second limiting portion (2525) and the main shaft (1).

5. The folding mechanism (100) according to any one of claims 2 to 4, characterized in that: The first connection end (231) and the third connection end (241) are arranged along a first direction, the first latch pin (251) and the second latch pin (252) are located between the first connection end (231) and the third connection end (241), and the first latch pin (251) and the second latch pin (252) are arranged along a second direction, the first direction is a length extension direction of the main axis (1), and the second direction intersects with the first direction.

6. The folding mechanism (100) according to claim 3 or 4, characterized in that: The main shaft (1) comprises a base (11) and an upper cover (12), wherein the upper cover (12) is fixed to the base (11), and a portion of the base (11) and a portion of the upper cover (12) enclose a receiving space (150); The first latch pin (251), the second latch pin (252) and the synchronous gear (253) are all located in the accommodating space (150).

7. The folding mechanism (100) according to claim 6, characterized in that: The upper cover (12) is provided with a first avoidance hole (123), the first avoidance hole (123) passes through the upper cover (12), and the first avoidance hole (123) is connected to the accommodating space (150); The first latch (251) has a pushing portion (2513), a portion of which passes through the first avoidance hole (123) from the accommodating space (150) and extends to the outside of the main shaft (1).

8. The folding mechanism (100) according to claim 7, characterized in that: The folding mechanism (100) further comprises a first shielding plate (4a) and a second shielding plate (4b), wherein the first shielding plate (4a) is fixedly connected to the second connecting end (232), and the second shielding plate (4b) is fixedly connected to the fourth connecting end (242); When the folding mechanism (100) is in a flattened state, the first shielding plate (4a) and the second shielding plate (4b) are located on the same side of the first fixing frame (21), the main shaft (1) and the second fixing frame (22), and the first shielding plate (4a) and the second shielding plate (4b) jointly cover the first fixing frame (21), the main shaft (1) and the second fixing frame (22); The second shielding plate (4b) is provided with a second avoidance hole (41b), the second avoidance hole (41b) is arranged opposite to the first avoidance hole (123) of the upper cover (12), and the pushing portion (2513) passes through the second avoidance hole (41b) of the second shielding plate (4b) and extends to The side of the second shielding plate (4b) away from the main shaft (1).

9. The folding mechanism (100) according to claim 6, characterized in that: The folding mechanism (100) further comprises a spring sheet (254), the spring sheet (254) comprising a first straight portion (2541), a bent portion (2542) and a second straight portion (2543), the first straight portion (2541) and the second straight portion (2543) both being fixed to a side of the upper cover (12) facing the accommodating space (150), and the bent portion (2542) protruding in a direction close to the second latch (252); The second latch (252) has a convex portion (2523); When the first latch (251) is inserted into the first slot (2311), the protrusion (2523) of the second latch (252) is located on a side of the bent portion (2542) of the spring sheet (254) close to the third connection end (241); When the first latch (251) is separated from the first slot (2311), the protrusion (2523) of the second latch (252) is located on a side of the bent portion (2542) of the spring sheet (254) away from the third connection end (241).

10. The folding mechanism (100) according to claim 9, characterized in that: The main shaft (1) is provided with a receiving groove (125), and at least a portion of the elastic sheet (254) is located in the receiving groove (125).

11. The folding mechanism (100) according to claim 6, characterized in that: The base (11) has a rotating shaft (116), the rotating shaft (116) is located in the accommodating space (150), and the synchronous gear (253) is sleeved on the rotating shaft (116) and rotatably connected to the rotating shaft (116).

12. The folding mechanism (100) according to any one of claims 6 to 11, characterized in that: The base (11) is provided with a first groove (111a), the bottom wall of the first groove (111a) is an arc-shaped surface, the bottom surface of the upper cover (12) includes a first arc-shaped surface (121), and the first groove (111a) and the first arc-shaped surface (121) form a first arc-shaped groove (13); The first connecting end (231) is in an arc shape, and the first connecting end (231) is located in the first arc groove (13).

13. The folding mechanism (100) according to claim 12, characterized in that: The bottom wall of the first groove (111a) is provided with a first avoidance groove (113); When the folding mechanism (100) is in a flattened state, the first avoidance groove (113) is arranged opposite to the first insertion slot (2311), and a portion of the first latch pin (251) can be inserted into the first avoidance groove (113).

14. The folding mechanism (100) according to any one of claims 1 to 13, characterized in that: The second connecting end (232) is slidably connected to the first fixing frame (21); The folding mechanism (100) comprises a first bracket (261a) and a first elastic member (262a), wherein the first bracket (261a) is located on the first fixing bracket (21) and is slidably connected to the first fixing bracket (21), and the first bracket (261a) is abutted against the second connecting end (232); The first elastic member (262a) is located on the first fixing frame (21), and one end of the first elastic member (262a) is abutted against the first bracket (261a), and the other end is abutted against the first fixing frame (21), and the first elastic member (262a) is used to apply a damping force to the second connecting end (232) through the first bracket (261a).

15. The folding mechanism (100) according to claim 14, characterized in that: The first bracket (261a) comprises a first abutting block (264a) and a plurality of fixing columns (263a), wherein the plurality of first fixing columns (263a) are fixed at intervals on one side of the first abutting block (264a), and the first abutting block (264a) abuts against the second connecting end (232); The first elastic member (262a) comprises a plurality of springs, and the plurality of springs are sleeved on the plurality of first fixing pillars (263a) in a one-to-one correspondence.

16. An electronic device (1000), characterized in that: The invention comprises a first shell (300), a second shell (400), a flexible screen (200), and a folding mechanism (100) according to any one of claims 1 to 15, wherein the first fixing frame (21) is fixedly connected to the first shell (300), and the second fixing frame (22) is fixedly connected to the second shell (400); The flexible screen (200) comprises a first display area (201), a second display area (202), and a third display area (203) which are connected in sequence; the first display area (201) is fixed to the first shell (300), and the third display area (203) is fixed to the second shell (400).

17. An electronic device (1000), characterized in that: The invention comprises a folding mechanism (100), a first shell (300) and a second shell (400), wherein the folding mechanism (100) connects the first shell (300) and the second shell (400), and the folding mechanism (100) is used to make the first shell (300) and the second shell (400) relatively unfold and close; The folding mechanism (100) comprises a main shaft (1), a first connecting arm (23) and a first latch (251); The first connecting arm (23) comprises a first connecting end (231) and a second connecting end (232), the first connecting end (231) being connected to the main shaft (1), the second connecting end (232) being connected to the first housing (300), and the first connecting end (231) being provided with a first slot (2311); The first latch (251) is located on the main shaft (1) and is movably connected to the main shaft (1); the first latch (251) is used to be inserted into the first slot (2311) when the electronic device (1000) is in a flattened state.

18. The electronic device (1000) according to claim 17, characterized in that: The folding mechanism (100) comprises a second connecting arm (24) and a second latch (252); The second connecting arm (24) comprises a third connecting end (241) and a fourth connecting end (242), the third connecting end (241) being connected to the main shaft (1), the fourth connecting end (242) being connected to the second housing (400), and the third connecting end (241) being provided with a second slot (2411); The second latch (252) is located on the main shaft (1) and is spaced apart from the first latch (251); the second latch (252) is movably connected to the main shaft (1); and the second latch (252) is used to be inserted into the second slot (2411) when the electronic device (1000) is in a flattened state.

19. The electronic device (1000) according to claim 18, characterized in that: The first latch (251) has a first meshing portion (2514), and the second latch (252) has a second meshing portion (2524); The folding mechanism (100) comprises a synchronous gear (253), wherein the synchronous gear (253) is located on the main shaft (1) and is rotationally connected to the main shaft (1), and the second meshing portion (2524) meshes with the first meshing portion (2514) through the synchronous gear (253).

20. The electronic device (1000) according to claim 18 or 19, characterized in that: The first connection end (231) and the third connection end (241) are arranged along a first direction, the first latch pin (251) and the second latch pin (252) are located between the first connection end (231) and the third connection end (241), and the first latch pin (251) and the second latch pin (252) are arranged along a second direction, the first direction is a length extension direction of the main axis (1), and the second direction intersects with the first direction.

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