Folding mechanism and electronic device

Abstract

The 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 latch. The first connecting arm comprises 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 fixing frame. 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 latch is located on the main shaft and movably connected to the main shaft. The first latch can be inserted into the first slot when the folding mechanism is in a flat 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 kept at a certain angle, for example, 180°. The main shaft, the first fixing frame and the second fixing frame are not prone to the problem of flat humpback.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of foldable electronic devices, and in particular, to a folding mechanism and an electronic device. BACKGROUND

[0002] With the development of technology and the demand of electronic device market, foldable electronic devices are more and more widely used, and users have higher and higher requirements on the overall delicacy of foldable electronic devices. The traditional foldable electronic device includes 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 flat state, the damping member abuts against the connecting arm, so that the first shell and the second shell are kept at a certain angle, such as 180°. However, after the electronic device is folded for a large number of times, the components of the folding mechanism are worn out and the damping force of the damping member is reduced due to spring attenuation, so that the first shell and the second shell rotate relative to the folding mechanism due to the rolling force of the flexible screen, thereby causing the electronic device to appear flat hump (or not flat) phenomenon, which affects the overall delicacy of the electronic device. SUMMARY

[0003] The purpose of the present application is to provide a folding mechanism and an electronic device which are flatly locked.

[0004] 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 bolt, the main shaft being 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 insertion 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 bolt is located in the main shaft and movably connected to the main shaft, and the first bolt is used to be inserted into the first insertion slot when the folding mechanism is in a flat state.

[0005] It can be understood that by providing the first bolt in the main shaft, at least part of the first insertion part of the first bolt can be inserted into the first insertion slot of the first connecting arm when the folding mechanism is in a flat state. In this way, the first connecting arm can no longer rotate relative to the main shaft. The first fixed frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first fixed frame and the second fixed frame can be kept at a certain angle, for example, 180°, and the main shaft, the first fixed frame and the second fixed frame are not prone to flat hump problem.

[0006] In addition, when the folding mechanism is in a flat state, the rotation of the first connecting arm is locked by inserting the first bolt into the first insertion slot. The present application provides a folding mechanism which is stably flatly locked, thereby improving the stability of the folding mechanism in a flat state.

[0007] In a possible implementation, the third connecting end is provided with a second slot; the folding mechanism comprises a second bolt, the second bolt is located on the main shaft and is arranged in a spaced manner with the first bolt, the second bolt is movably connected to the main shaft, and the second bolt is used to be inserted into the second slot when the folding mechanism is in the unfolded state.

[0008] It can be understood that, by arranging the second bolt in the main shaft, at least part of the second inserting part of the second bolt can be inserted into the second slot of the second connecting arm when the folding mechanism is in the unfolded state. In this way, the second connecting arm can no longer rotate relative to the main shaft. The second fixed frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first fixed frame and the second fixed frame can be better kept at a certain angle, for example, 180°. The main shaft, the first fixed frame and the second fixed frame are less likely to have the problem of unfolding humpback.

[0009] In addition, when the folding mechanism is in the unfolded state, the rotation of the second connecting arm is locked by inserting the second bolt into the second slot. The present application provides a folding mechanism that is stably unfolded and locked, thereby improving the stability of the folding mechanism in the unfolded state.

[0010] In a possible implementation, the first bolt has a first engaging part, and the second bolt has a second engaging part; the folding mechanism comprises a synchronous gear, the synchronous gear is located on the main shaft and is rotatably connected to the main shaft, and the second engaging part engages the first engaging part through the synchronous gear.

[0011] It can be understood that, by arranging the synchronous gear between the first bolt and the second bolt, the synchronous gear is used to synchronously drive the movement of the second bolt when the first bolt is driven to move. In this way, the present implementation can realize the synchronous movement of the first bolt and the second bolt by using one driving force. The first bolt and the second bolt are respectively inserted into the first connecting arm and the second connecting arm. The structure of the folding mechanism of the present implementation is relatively simple, and the assembly difficulty and manufacturing cost can be reduced.

[0012] In a possible implementation, the first bolt has a first limiting part, the second bolt has a second limiting part, and part of the synchronous gear is located between the first limiting part and the main shaft and part of the synchronous gear is located between the second limiting part and the main shaft.

[0013] It can be understood that, by the mutual cooperation of the main shaft, the first limiting part of the first bolt and the second limiting part of the second bolt, the synchronous gear is limited in the thickness direction of the main shaft. In this way, the first bolt and the second bolt can not only lock the first connecting arm and the second connecting arm respectively when the folding mechanism is in the unfolded state, but also can cooperate with the main shaft to limit the synchronous gear in the thickness direction of the main shaft. The first bolt and the second bolt have the effect of "one thing with multiple uses".

[0014] In a 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 connecting end and the third connecting end, and the first latch and the second latch are arranged along a second direction, the first direction being a length extension direction of the main shaft, and the second direction intersecting the first direction. In this way, the first connecting end of the first connecting arm, the third connecting end of the second connecting arm, the first latch, and the second latch are arranged compactly on the main shaft, and the space utilization rate is high.

[0015] In a possible implementation, the main shaft includes a base and an upper cover, the upper cover is fixed to the base, and a part of the base and a part of the upper cover enclose a containing space; the first latch, the second latch, and the synchronous gear are located in the containing space. In this way, on the one hand, the base and the upper cover can protect the first latch, the second latch, and the synchronous gear, and the first latch, the second latch, and the synchronous gear are not prone to interfering with devices outside the main shaft. On the other hand, the first latch, the second latch, and the synchronous gear are arranged compactly on the main shaft, and the space utilization rate is high.

[0016] In a possible implementation, the upper cover is provided with a first avoiding hole, the first avoiding hole penetrates through the upper cover, and the first avoiding hole is in communication with the containing space; the first latch has a pushing part, a part of the pushing part passes through the first avoiding hole from the containing space, and extends to the outside of the main shaft. In this way, a user can conveniently push the pushing part of the first latch to move the first latch relative to the main shaft.

[0017] In a possible implementation, the folding mechanism further includes a first shielding plate and a second shielding plate, the first shielding plate is fixedly connected with the second connecting end, and the second shielding plate is fixedly connected with the fourth connecting end; when the folding mechanism is in the unfolded 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 avoiding hole, the second avoiding hole is arranged opposite the first avoiding hole of the upper cover, the pushing part passes through the second avoiding hole of the second shielding plate, and extends to a side of the second shielding plate away from the main shaft.

[0018] It can be understood that, when the electronic device is in the unfolded state, the first shielding plate is used to shield a gap between the first shell and the main shaft, and the second shielding plate is used to shield a gap between the second shell and the main shaft. Therefore, the folding mechanism can jointly shield the gap between the first shell and the second shell by the first shielding plate and the second shielding plate in the unfolded state, so that self-shielding is achieved, the integrity of the appearance is improved, and the risk of external dust, sundries, and the like entering the inner folding mechanism is reduced, so as to ensure the reliability of the electronic device.

[0019] In addition, the pushing portion of the first plug is convenient for a user to push to move the first plug relative to the main shaft by passing through the second avoiding hole of the second shielding plate and extending to a side of the second shielding plate away from the main shaft.

[0020] In a possible implementation, the folding mechanism further comprises an elastic sheet, the elastic sheet comprises a first flat portion, a bent portion and a second flat portion, the first flat portion and the second flat portion are fixed to a side of the upper cover facing the accommodation space, and the bent portion protrudes in a direction close to the second plug; the second plug has a protruding portion; when the first plug is inserted into the first slot, the protruding portion of the second plug is located on a side of the bent portion of the elastic sheet close to the third connecting end of the second connecting arm; and when the first plug is separated from the first slot, the protruding portion of the second plug is located on a side of the bent portion of the elastic sheet away from the third connecting end.

[0021] It can be understood that, when the first plug is inserted into the first slot, the protruding portion of the second plug can be located on a side of the bent portion of the elastic sheet close to the third connecting end of the second connecting arm. The bent portion of the elastic sheet can be used to block the movement of the second plug in a direction away from the second connecting arm, thereby limiting the second connecting portion of the second plug from being pulled out of the second slot, ensuring that the second connecting arm can no longer rotate relative to the main shaft, and improving the connection reliability of the second plug and the second connecting arm. Since the bent portion of the elastic sheet can be used to block the movement of the second plug in a direction away from the second connecting arm, the second plug cannot drive the synchronous gear to rotate. The synchronous gear cannot drive the first plug to move in a direction away from the first connecting arm, thereby limiting the first connecting portion of the first plug from being pulled out of the first slot, further ensuring that the first connecting arm can no longer rotate relative to the main shaft, and improving the connection reliability of the first plug and the first connecting arm.

[0022] It can be understood that, when the first plug is separated from the first slot, the bent portion of the elastic sheet can be used to block the movement of the second plug in a direction close to the second connecting arm, thereby avoiding the second connecting arm from being unable to rotate due to the second connecting portion of the second plug being inserted into the second slot during the rotation of the second connecting arm, that is, ensuring that the second connecting arm can rotate relative to the main shaft. Since the bent portion of the elastic sheet can be used to block the movement of the second plug in a direction close to the second connecting arm, the second plug cannot drive the synchronous gear to rotate. The synchronous gear cannot drive the first plug to move in a direction close to the first connecting arm, thereby avoiding the first connecting arm from being unable to rotate due to the first connecting portion of the first plug being inserted into the first slot during the rotation of the first connecting arm, that is, ensuring that the first connecting arm can rotate relative to the main shaft.

[0023] In a possible implementation, the main shaft is provided with a receiving groove, and at least part of the elastic sheet is located in the receiving groove. It can be understood that, in the thickness direction of the main shaft, the elastic sheet and the upper cover have an overlapping region, which can improve the space utilization.

[0024] In a possible implementation, the base has a rotating shaft, the rotating shaft is located in the accommodation space, the synchronous gear is sleeved on the rotating shaft, and the rotating shaft is rotationally connected to the synchronous gear. It can be understood that, on the one hand, the rotating shaft can provide structural support for rotation of the synchronous gear. On the other hand, by arranging the rotating shaft as part of the base, the structure of the folding mechanism can be simplified.

[0025] In a possible implementation, the base is provided with a first recess, a bottom wall of the first recess is an arc surface, a bottom surface of the upper cover includes a first arc surface, the first recess and the first arc surface form a first arc-shaped groove, and the first connecting end is in an arc shape and located in the first arc-shaped groove.

[0026] It can be understood that the first connecting end of the first connecting arm is connected to the main shaft through a virtual shaft, the structure of the rotation connection is relatively simple, the space occupied is small, and the thickness of the folding mechanism can be reduced, so that the folding mechanism and the electronic device are more easily thinned.

[0027] In a possible implementation, the bottom wall of the first recess is provided with a first avoiding groove, the first avoiding groove is arranged opposite to the first insertion groove when the folding mechanism is in the unfolded state, and a part of the first insertion pin can be inserted into the first avoiding groove.

[0028] It can be understood that, by arranging the first avoiding groove in the first arc-shaped groove, a part of the first insertion part of the first insertion pin can be inserted into the first avoiding groove when the electronic device is in the unfolded state. The first avoiding groove can be used to avoid interference between the first insertion pin and the bottom wall of the first arc-shaped groove. In addition, the first avoiding groove can also limit the first insertion pin in the width direction of the main shaft to some extent, so that the stability of the first insertion pin is better.

[0029] In a possible implementation, the second connecting end is slidably connected to the first fixing frame, the folding mechanism includes a first support and a first elastic member, the first support is located in the first fixing frame and is slidably connected to the first fixing frame, the first support abuts against the second connecting end, the first elastic member is located in the first fixing frame, one end of the first elastic member abuts against the first support, and the other end of the first elastic member abuts against the first fixing frame, and the first elastic member is configured to apply a damping force to the second connecting end through the first support.

[0030] It can be understood that, by arranging the first support and the first elastic member at the first support, the first elastic member can exert a damping force on the second connecting end through the first support, so that the first connecting arm is less likely to rotate relative to the main shaft without external force, that is, the first connecting arm can be further locked. When the folding number or the unfolding number of the electronic device is large, the damping force of the first elastic member will decrease, and the resisting and limiting capability of the first connecting arm will weaken. In addition, when the folding mechanism is applied to the electronic device, after the electronic device is placed in a folded state for a long time, the flexible screen has a large rolling force. In this way, when the electronic device is in an unfolded state, the flexible screen will overcome the small elastic force of the first elastic member to drive the first shell and the second shell to move closer to each other. The first shell can drive the first fixed frame to rotate relative to the main shaft through the first connecting arm, and the second shell can drive the second fixed frame to rotate relative to the main shaft through the second connecting arm. At this time, when the electronic device is in an unfolded state, the first shell and the second shell cannot maintain a predetermined relative positional relationship (for example, the first shell and the second shell are maintained at 180°), that is, the electronic device will have an unfolded humpback (unfolded uneven) phenomenon. For example, there will be a relatively obvious included angle between the first shell and the second shell, which can be 150°, 155° or 160°, etc. At this time, by arranging the first pin, the second pin and the synchronous gear in the main shaft, 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 when the electronic device is in an unfolded state. At this time, even if the flexible screen exerts a force on 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 fixed frame and the second fixed 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 predetermined relative position (for example, the first shell and the second shell are maintained at 180°). When the electronic device is in an unfolded state, the electronic device is more beautiful.

[0031] It can be understood that, if the folding mechanism includes the first support and the first elastic member, the user can choose whether to insert the first pin into the first slot when the electronic device is in an unfolded state. For example, when the folding number or the unfolding number of the electronic device is small, the damping force of the first elastic member is normal, and the first elastic member can normally exert a damping force on the second connecting end through the first support. At this time, the first support and the first elastic member can lock the rotation of the first connecting arm, and the user can not need to insert the first pin into the first slot when the electronic device is in an unfolded state. When the folding number or the unfolding number of the electronic device is large, the damping force of the first elastic member is invalid, and the first elastic member cannot normally exert a damping force on the second connecting end through the first support. At this time, the first support 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 an unfolded state.

[0032] In a possible implementation, the first support frame includes a first abutting block and a plurality of first fixing columns, the plurality of first fixing columns are fixed to one side of the first abutting block at intervals, and the first abutting block abuts against the second connecting end; the first elastic member includes a plurality of springs, and the plurality of springs are correspondingly sleeved on the plurality of first fixing columns.

[0033] In a second aspect, the present application provides an electronic device. The electronic device includes a first shell, a second shell, a flexible screen, and a folding mechanism according to any one of claims 1 to 13, the first support frame is fixedly connected to the first shell, and the second support frame is fixedly connected to the second shell; the flexible screen includes a first display area, a second display area, and a third display area connected in sequence, the first display area is fixed to the first shell, and the third display area is fixed to the second shell.

[0034] It can be understood that by arranging the first plug pin in the main shaft, at least part of the first plug-in part of the first plug pin can be inserted into the first slot of the first connecting arm when the electronic device is in the unfolded state. In this way, the first connecting arm can no longer rotate relative to the main shaft. The first support frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first support frame, and the second support frame can be kept at a certain angle, for example, 180°, that is, the main shaft, the first shell, and the second shell can be kept at a certain angle, for example, 180°. In this way, the main shaft, the first shell, and the second shell are less likely to have the problem of unfolding humpback.

[0035] In addition, when the electronic device is in the unfolded state, by inserting the first plug pin into the first slot, the rotation of the first connecting arm is locked. The present application provides a folding mechanism and an electronic device that are stably unfolded and locked, thereby improving the stability of the electronic device in the unfolded state.

[0036] In a third aspect, the present application provides an electronic device. The electronic device includes a folding mechanism, a first shell, and a second shell, the folding mechanism connects the first shell and the second shell, and is used for relatively unfolding and closing the first shell and the second shell; the folding mechanism includes a main shaft, a first connecting arm, and a first plug pin; the first connecting arm includes 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 shell, and the first connecting end is provided with a first slot; the first plug pin is located in the main shaft and movably connected to the main shaft, and is used for being inserted into the first slot when the electronic device is in an unfolded state.

[0037] It can be understood that by arranging the first plug-in pin in the main shaft, at least part of the first plug-in part of the first plug-in pin can be inserted into the first plug-in slot of the first connecting arm when the electronic device is in the unfolded state. In this way, the first connecting arm can no longer rotate relative to the main shaft. The first fixed frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first fixed frame and the second fixed frame can be kept at a certain angle, for example, 180°, that is, the main shaft, the first shell and the second shell can be kept at a certain angle, for example, 180°. In this way, the main shaft, the first shell and the second shell are less likely to have the problem of unfolding humpback.

[0038] In addition, when the electronic device is in the unfolded state, the rotation of the first connecting arm is locked by inserting the first plug-in pin into the first plug-in slot. The application provides a folding mechanism and an electronic device that are stably unfolded and locked, thereby improving the stability of the electronic device in the unfolded state.

[0039] In a possible implementation, the folding mechanism comprises a second connecting arm and a second plug-in pin; the second connecting arm comprises 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 plug-in slot; the second plug-in pin is located in the main shaft and is arranged in a spaced manner with the first plug-in pin, the second plug-in pin is movably connected to the main shaft, and the second plug-in pin is used to be inserted into the second plug-in slot when the electronic device is in the unfolded state.

[0040] It can be understood that by arranging the second plug-in pin in the main shaft, the second plug-in pin can be inserted into the second plug-in slot of the second connecting arm when the electronic device is in the unfolded state. In this way, the second connecting arm can no longer rotate relative to the main shaft. The second fixed frame can also no longer rotate relative to the main shaft. At this time, the main shaft, the first fixed frame and the second fixed frame can be better kept at a certain angle, for example, 180°, that is, the main shaft, the second shell and the second shell can be better kept at a certain angle, for example, 180°. The main shaft, the second shell and the second shell are less likely to have the problem of unfolding humpback.

[0041] In addition, when the electronic device is in the unfolded state, the rotation of the second connecting arm is locked by inserting the second plug-in pin into the second plug-in slot. The application provides a folding mechanism and an electronic device that are stably unfolded and locked, thereby improving the stability of the electronic device in the unfolded state.

[0042] In a possible implementation, the first plug-in pin has a first meshing part, and the second plug-in pin has a second meshing part; the folding mechanism comprises a synchronous gear, the synchronous gear is located in the main shaft and is rotatably connected to the main shaft, and the second meshing part meshes with the first meshing part through the synchronous gear.

[0043] It can be understood that the synchronous gear is arranged between the first bolt and the second bolt, so that the second bolt is synchronously driven to move by the synchronous gear while the first bolt is driven to move. In this way, the first bolt and the second bolt can be synchronously moved by one driving force. The first bolt and the second bolt are respectively inserted into the first connecting arm and the second connecting arm. The folding mechanism of the present embodiment has a relatively simple structure, and can reduce assembly difficulty and manufacturing cost.

[0044] In a possible implementation, the first bolt has a first limiting portion, the second bolt has a second limiting portion, and a part of the synchronous gear is located between the first limiting portion and the main shaft, and another part of the synchronous gear is located between the second limiting portion and the main shaft.

[0045] It can be understood that the main shaft, the first limiting portion of the first bolt and the second limiting portion of the second bolt are matched with each other to limit the synchronous gear in the thickness direction of the main shaft. In this way, the first bolt and the second bolt can lock the first connecting arm and the second connecting arm respectively when the folding mechanism is in the unfolded state, and can be matched with the main shaft to limit the synchronous gear in the thickness direction of the main shaft. The first bolt and the second bolt have the effect of "one thing with multiple uses".

[0046] In a possible implementation, the first connecting end and the third connecting end are arranged along a first direction, the first bolt and the second bolt are located between the first connecting end and the third connecting end, and the first bolt and the second bolt are arranged along a second direction. The first direction is a length extension direction of the main shaft, 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, the first bolt and the second bolt are arranged relatively compactly on the main shaft, and the space utilization rate is high.

[0047] In a possible implementation, the folding mechanism further includes a spring piece, the spring piece includes a first flat portion, a bent portion and a second flat portion, the first flat portion and the second flat portion are fixed to a side of the upper cover facing the accommodation space, and the bent portion protrudes toward the second bolt; the second bolt has a protruding portion; when the first bolt is inserted into the first slot, the protruding portion of the second bolt is located on a side of the bent portion of the spring piece close to the third connecting end; and when the first bolt is separated from the first slot, the protruding portion of the second bolt is located on a side of the bent portion of the spring piece away from the third connecting end.

[0048] It can be understood that when the first plug is separated from the first slot, the bent part of the elastic sheet can be used to block the movement of the second plug in the direction close to the second connecting arm, so as to avoid that the second connecting arm cannot rotate due to the second plug-in part of the second plug being inserted into the second slot during the rotation of the second connecting arm, that is, to ensure that the second connecting arm can rotate relative to the main shaft. Since the bent part of the elastic sheet can be used to block the movement of the second plug in the direction close to the second connecting arm, the second plug cannot drive the synchronous gear to rotate. The synchronous gear cannot drive the first plug to move in the direction close to the first connecting arm, so as to avoid that the first connecting arm cannot rotate due to the plug-in part of the first plug being inserted into the first slot during the rotation of the first connecting arm, that is, to ensure that the first connecting arm can rotate relative to the main shaft.

[0049] It can be understood that when the first plug is inserted into the first slot, the convex part of the second plug can be located on the side of the bent part of the elastic sheet close to the third connecting end of the second connecting arm. The bent part of the elastic sheet can be used to block the movement of the second plug in the direction away from the second connecting arm, so as to limit the second plug-in part of the second plug from being pulled out of the second slot, ensure that the second connecting arm no longer rotates relative to the main shaft, and improve the connection reliability of the second plug and the second connecting arm. It can be understood that since the bent part of the elastic sheet can be used to block the movement of the second plug in the direction away from the second connecting arm, the second plug cannot drive the synchronous gear to rotate. The synchronous gear cannot drive the first plug to move in the direction away from the first connecting arm, so as to limit the first plug-in part of the first plug from being pulled out of the first slot, and further ensure that the first connecting arm no longer rotates relative to the main shaft, and improve the connection reliability of the first plug and the first connecting arm.

[0050] In a possible implementation, the second connecting end is slidingly connected to the first fixing frame; the folding mechanism includes a first support and a first elastic member, the first support is located on the first fixing frame and is slidingly connected to the first fixing frame, and the first support abuts against the second connecting end; the first elastic member is located on the first fixing frame, one end of the first elastic member abuts against the first support, and the other end of the first elastic member abuts against the first fixing frame, and the first elastic member is used to exert a damping force on the second connecting end through the first support.

[0051] It can be understood that, by arranging the first support and the first elastic member at the first support, the first elastic member can exert a damping force on the second connecting end through the first support, so that the first connecting arm is less likely to rotate relative to the main shaft without external force, that is, the first connecting arm is further locked. In the present embodiment, when the folding number or the unfolding number of the electronic device is large, the damping force of the first elastic member will decrease, and the resisting and limiting capability of the first elastic member on the first connecting arm will weaken. In addition, when the folding mechanism is applied to the electronic device, after the electronic device is placed in a folded state for a long time, the flexible screen has a large rolling force. In this way, when the electronic device is in an unfolded state, the flexible screen will overcome the small elastic force of the first elastic member to drive the first housing and the second housing to move towards each other, the first housing can drive the first fixed frame to rotate relative to the main shaft through the first connecting arm, and the second housing can drive the second fixed frame to rotate relative to the main shaft through the second connecting arm. At this time, when the electronic device is in an unfolded state, the first housing and the second housing cannot maintain a predetermined relative positional relationship (for example, the first housing and the second housing are maintained at 180°), that is, the electronic device will have an unfolded humpback (unfolded uneven) phenomenon. For example, there will be a relatively obvious included angle between the first housing and the second housing, which can be 150°, 155° or 160°, etc. At this time, by arranging the first pin, the second pin and the synchronous gear in the main shaft, 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 when the electronic device is in an unfolded state. At this time, even if the flexible screen exerts a force on the first housing and the second housing to move towards each other, the first connecting arm and the second connecting arm will no longer rotate relative to the main shaft, the first fixed frame and the second fixed frame will no longer rotate relative to the main shaft, and the first housing and the second housing will no longer rotate relative to the main shaft. At this time, the first housing and the second housing can be maintained in a predetermined relative position (for example, the first housing and the second housing are maintained at 180°). When the electronic device is in an unfolded state, the electronic device is more beautiful.

[0052] It can be understood that, if the folding mechanism includes the first support and the first elastic member, the user can choose whether to insert the first pin into the first slot when the electronic device is in an unfolded state. For example, when the folding number or the unfolding number of the electronic device is small, the damping force of the first elastic member is normal, and the first elastic member can normally exert a damping force on the second connecting end through the first support. At this time, the first support and the first elastic member can lock the first connecting arm from rotating, and the user can not need to insert the first pin into the first slot when the electronic device is in an unfolded state. When the folding number or the unfolding number of the electronic device is large, the damping force of the first elastic member is invalid, and the first elastic member cannot normally exert a damping force on the second connecting end through the first support. At this time, the first support and the first elastic member cannot lock the first connecting arm from rotating, and the user can insert the first pin into the first slot when the electronic device is in an unfolded state. Attached Figure Description

[0053] To illustrate the technical solutions in the embodiments or background art of this application, the accompanying drawings used in the embodiments or background art of this application will be described below.

[0054] Figure 1 This is a schematic diagram of the electronic device provided in the embodiments of this application in a flattened state;

[0055] Figure 2 yes Figure 1 A partial cross-sectional schematic diagram of one embodiment of the electronic device shown at line AA;

[0056] Figure 3 yes Figure 1 A schematic diagram of one embodiment of the electronic device in a closed state;

[0057] Figure 4 yes Figure 3 A partial cross-sectional schematic diagram of one embodiment of the electronic device shown at the BB line;

[0058] Figure 5 yes Figure 1 A partially exploded view of the electronic device shown in one embodiment;

[0059] Figure 6 yes Figure 1 The diagram shown is a structural schematic of the folding mechanism from another angle.

[0060] Figure 7 yes Figure 6 The folding mechanism shown is partially exploded in one embodiment.

[0061] Figure 8 yes Figure 7 The folding mechanism shown is partially exploded in one embodiment.

[0062] Figure 9 yes Figure 8 The folding mechanism shown is partially exploded in one embodiment.

[0063] Figure 10 yes Figure 9 An enlarged schematic diagram of the middle part of the base shown in one embodiment;

[0064] Figure 11 yes Figure 9 The diagram shows the structure of the top cover from another angle;

[0065] Figure 12 yes Figure 8 The folding mechanism shown is a partial structural diagram of one embodiment. Figure 1;

[0066] Figure 13 yes Figure 12 A partial cross-sectional schematic diagram of one embodiment of the spindle at the CC line;

[0067] Figure 14 yes Figure 12 A partial cross-sectional schematic diagram of one embodiment of the spindle at line DD;

[0068] Figure 15 yes Figure 12 A partial cross-sectional schematic diagram of one embodiment of the spindle at line EE;

[0069] Figure 16 yes Figure 8 The diagram shows a partially exploded view of the central connecting component in one embodiment.

[0070] Figure 17 yes Figure 16 The diagram shows a partial structural schematic of the central connecting component in one embodiment.

[0071] Figure 18 yes Figure 16 The diagram shows the structure of the first and second connecting arms in one embodiment.

[0072] Figure 19 yes Figure 8 The folding mechanism shown is a partial structural diagram of one embodiment. Figure 2 ;

[0073] Figure 20 yes Figure 8 The folding mechanism shown is a partial structural diagram of one embodiment. Figure 3 ;

[0074] Figure 21 yes Figure 20 A partial cross-sectional schematic diagram of one embodiment of the folding mechanism shown at line FF;

[0075] Figure 22 yes Figure 21 Partial cross-sectional view of the folding mechanism in the folded state;

[0076] Figure 23 yes Figure 22 A partial cross-sectional view of one embodiment of the folding mechanism shown at line GG;

[0077] Figure 24 yes Figure 16 The diagram shows the structure of the first pin at different angles in one embodiment.

[0078] Figure 25 yesFigure 8 A folding mechanism shown in a partial structural diagram of an embodiment Figure 4

[0079] Figure 26 A folding mechanism shown in a partial structural diagram of an embodiment Figure 8 A folding mechanism shown in a partial structural diagram of an embodiment Figure 5

[0080] Figure 27 A folding mechanism shown in a partial structural diagram of an embodiment Figure 25 A partial structural diagram of an electronic device shown in a locked state

[0081] Figure 28 A folding mechanism shown in a partial structural diagram of an embodiment Figure 16 A structural diagram of a second latch shown in another angle of an embodiment

[0082] Figure 29 A folding mechanism shown in a partial structural diagram of an embodiment Figure 8 A folding mechanism shown in a partial structural diagram of an embodiment Figure 6

[0083] Figure 30 A folding mechanism shown in a structural diagram of an embodiment Figure 29 A folding mechanism shown in a structural diagram of an embodiment

[0084] Figure 31 A folding mechanism shown in a partial structural diagram of an embodiment Figure 8 A folding mechanism shown in a partial structural diagram of an embodiment

[0085] Figure 32 A folding mechanism shown in a partial structural diagram of an embodiment Figure 8 A folding mechanism shown in a partial structural diagram of an embodiment Figure 7

[0086] Figure 33 A folding mechanism shown in a structural diagram of an embodiment Figure 32 A folding mechanism shown in a structural diagram of an embodiment

[0087] Figure 34 A first damping member and a second damping member shown in a partial exploded view of an embodiment Figure 16 A first damping member, a second damping member, a third damping member, and a fourth damping member shown in an enlarged view

[0088] Figure 35 A folding mechanism shown in a partial structural diagram of an embodiment Figure 16 A folding mechanism shown in a partial structural diagram of an embodiment

[0089] Figure 36 A folding mechanism shown in a partial structural diagram of an embodiment Figure 8 A folding mechanism shown in a partial structural diagram of an embodiment Figure 8

[0090] Figure 37 A folding mechanism shown in a partial structural diagram of an embodiment Figure 6 ​​​​​An exploded view of the electronic device in another embodiment from another angle;

[0091] Figure 38 is Figure 37 A structural schematic diagram of the electronic device in a folded state;

[0092] Figure 39 is Figure 6 A partial structural schematic diagram of the electronic device in another embodiment from another angle. DETAILED DESCRIPTION

[0093] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0094] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms “mounting”, “connection”, “connecting”, and “joint” should be understood in a broad sense, for example, “connecting” can be detachable connection or non-detachable connection; can be direct connection or indirect connection through an intermediate medium; can be electrical connection or mechanical connection. Among them, “fixed connection” refers to the relative position relationship after being connected does not change. “Rotary connection” refers to the relative rotation after being connected. “Sliding connection” refers to the relative sliding after being connected. In addition, the integrated structure obtained by the one-piece forming process of two components means that one of the two components is connected with the other component in the process of forming the component, and the two components do not need to be connected together by reprocessing (such as bonding, welding, buckling connection, screw connection) method.

[0095] The orientation terms mentioned in the embodiments of the present application, such as “top”, “bottom”, “inner”, “outer” and the like, are only the direction of the drawings, therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, and are not indicative or implied that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. For ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0096] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in a "or" relationship.

[0097] Figure 1 is a structural schematic diagram of an electronic device 1000 in a flat state provided by an embodiment of the present application. Figure 2 is Figure 1 is a partial cross-sectional schematic diagram of an embodiment of the electronic device 1000 at the A-A line. Figure 3 is Figure 1 is a structural schematic diagram of an embodiment of the electronic device 1000 in a closed state. Figure 4 is Figure 3 is a partial cross-sectional schematic diagram of an embodiment of the electronic device 1000 at the B-B line.

[0098] As Figures 1 to 4 shown, the present application provides a foldable electronic device 1000. The foldable electronic device 1000 can be a mobile phone, a tablet computer, a personal computer, a notebook computer, a vehicle-mounted device, or a wearable device (such as a smart bracelet) that can be folded. The embodiments of the present application take the mobile phone as an example for detailed description.

[0099] For ease of description, the thickness direction of the electronic device 1000 is defined as the Z-axis direction, the extension direction of the rotation axis of the electronic device 1000 is defined as 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 can 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 the needs, as long as the first direction, the second direction and the third direction intersect with each other.

[0100] It can be understood that, in the 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 unfolded 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. The embodiment is described by taking the direction of the rotation axis of the electronic device 1000 as the Y-axis direction as an example, and at this time, the electronic device 1000 can be folded left and right, and the folding and unfolding of the electronic device 1000 affects the length size 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 unfolded or folded along the X-axis direction. At this time, the electronic device 1000 can be folded up and down, and the folding and unfolding of the electronic device 1000 affects the width size of the electronic device 1000.

[0101] Figure 5 is Figure 1 a partial exploded view of the electronic device 1000 in an embodiment. Figure 6 is Figure 1 a partial structural schematic view of the electronic device 1000 in an embodiment.

[0102] As shown in Figure 5 and Figure 6 , the electronic device 1000 includes a folding mechanism 100, a flexible screen 200, a first housing 300, and a second housing 400. The flexible screen 200 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, or a quantum dot light emitting diode (QLED) display screen, etc. In addition, the folding mechanism 100 can be an outer folding mechanism or an inner folding mechanism. The outer folding mechanism refers to a folding mechanism that can fold at least part of the flexible screen 200 to the outside of the housing. The inner folding mechanism refers to a folding mechanism that can fold at least part of the flexible screen 200 between the two housings. The folding mechanism 100 is not limited in structure in the present application. In the embodiment, the folding mechanism 100 is taken as an example of an outer folding mechanism.

[0103] As shown in Figure 5and Figure 6 As shown in FIG. 1, the folding mechanism 100 is connected between the first housing 300 and the second housing 400. The folding mechanism 100 is used to unfold or fold the first housing 300 and the second housing 400 relative to each other.

[0104] As shown in FIG. 1, the folding mechanism 100 is connected between the first housing 300 and the second housing 400. The folding mechanism 100 is used to unfold or fold the first housing 300 and the second housing 400 relative to each other. Figure 1 and Figure 2 As shown in FIG. 1, when the first housing 300 and the second housing 400 are unfolded relative to each other to a flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation of 180°, for example, 165°, 177°, or 185°, etc.

[0105] As shown in FIG. 1, when the first housing 300 and the second housing 400 are unfolded relative to each other to a flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation of 180°, for example, 165°, 177°, or 185°, etc. Figure 3 and Figure 4 As shown in FIG. 1, when the first housing 300 and the second housing 400 are unfolded relative to each other to a flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation of 180°, for example, 165°, 177°, or 185°, etc.

[0106] As shown in FIG. 1, when the first housing 300 and the second housing 400 are unfolded relative to each other to a flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation of 180°, for example, 165°, 177°, or 185°, etc.

[0107] As shown in FIG. 1, when the first housing 300 and the second housing 400 are unfolded relative to each other to a flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation of 180°, for example, 165°, 177°, or 185°, etc. Figure 5 As shown in FIG. 1, when the first housing 300 and the second housing 400 are unfolded relative to each other to a flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation of 180°, for example, 165°, 177°, or 185°, etc. Figures 1 to 4 As shown in FIG. 1, 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. Figure 1 、 Figure 2 and Figure 5The first display area 201, the second display area 202 and the third display area 203 are simply and schematically distinguished by dotted lines. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300. The third display area 203 is fixedly connected to the second shell 400. In the process of unfolding or folding the first shell 300 and the second shell 400 relative to each other, the first shell 300 can drive the first display area 201 to move, the second shell 400 can drive the third display area 203 to move, the first display area 201 and the third display area 203 are unfolded or folded relative to each other, and the second display area 202 can be deformed.

[0108] 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 unfolded or folded relative to each other, the relative unfolding and folding actions 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 have high reliability.

[0109] As shown in FIG. 1, the electronic device 1000 is in a folded state. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300, and the third display area 203 is fixedly connected to the second shell 400. The first display area 201 and the third display area 203 are folded relative to each other, and the second display area 202 is deformed. Figure 1 As shown in FIG. 1, the electronic device 1000 is in a folded state. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300, and the third display area 203 is fixedly connected to the second shell 400. The first display area 201 and the third display area 203 are folded relative to each other, and the second display area 202 is deformed. Figure 2 As shown in FIG. 1, the electronic device 1000 is in a folded state. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300, and the third display area 203 is fixedly connected to the second shell 400. The first display area 201 and the third display area 203 are folded relative to each other, and the second display area 202 is deformed.

[0110] As shown in FIG. 1, the electronic device 1000 is in a folded state. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300, and the third display area 203 is fixedly connected to the second shell 400. The first display area 201 and the third display area 203 are folded relative to each other, and the second display area 202 is deformed.

[0111] As shown in FIG. 1, the electronic device 1000 is in a folded state. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300, and the third display area 203 is fixedly connected to the second shell 400. The first display area 201 and the third display area 203 are folded relative to each other, and the second display area 202 is deformed. Figure 3 As shown in FIG. 1, the electronic device 1000 is in a folded state. The first display area 201 of the flexible screen 200 is fixedly connected to the first shell 300, and the third display area 203 is fixedly connected to the second shell 400. The first display area 201 and the third display area 203 are folded relative to each other, and the second display area 202 is deformed. Figure 4As shown, when the electronic device 1000 is in the folded state, the flexible screen 200 is in the folded state. Exemplarily, 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 in a bent shape. At this time, the flexible screen 200 can be approximately in a U shape. 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 planar size of the electronic device 1000 is small (has a small width size), which is convenient for the user to carry and store.

[0112] Figure 7 is Figure 6 The folding mechanism 100 shown in is a partial exploded view of an embodiment. Figure 8 is Figure 7 The folding mechanism 100 shown in is a partial exploded view of an embodiment.

[0113] Please refer to Figure 7 and Figure 8 , and in combination with Figure 5 and Figure 6 As shown, 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 length extension direction of the main shaft 1 is the Y-axis direction.

[0114] Exemplarily, the main shaft 1 is located between the first shell 300 and the second shell 400. The middle connecting assembly 2 connects the first shell 300, the main shaft 1, and the second shell 400. The end connecting assembly 3 connects the first shell 300, the main shaft 1, and the second shell 400. The number of end connecting assemblies 3 is two, and the two end connecting assemblies 3 are arranged in the axial direction of the main shaft 1, for example, can be connected to the top and bottom of the main shaft 1 respectively. The two end connecting assemblies 3 are located on both sides of the middle connecting assembly 2, that is, the middle connecting assembly 2 is located between the two end connecting assemblies 3.

[0115] It can be understood that through the cooperation of the end connecting assembly 3 and the middle connecting assembly 2, the first shell 300 and the second shell 400 can be relatively unfolded or folded. Exemplarily, the end connecting assembly 3 is used to mainly unfold or fold the first shell 300 and the second shell 400 relative to each other. The middle connecting assembly 2 is used to assist the end connecting assembly 3 to unfold or fold the first shell 300 and the second shell 400 relative to each other. The specific structure of the end connecting assembly 3 is not specifically limited by the present application.

[0116] Exemplarily, the first shielding plate 4a and the second shielding plate 4b are connected at two sides of the main shaft 1 respectively. When the electronic device 1000 is in the unfolded state, the first shielding plate 4a is used to shield the gap between the first housing 300 and the main shaft 1, and the second shielding plate 4b is used to shield the gap between the second housing 400 and the main shaft 1. Therefore, the folding mechanism 100 can shield the gap between the first housing 300 and the second housing 400 by the first shielding plate 4a and the second shielding plate 4b in the unfolded state, so as to realize self-shielding, improve the integrity of the appearance, and reduce the risk of external dust, sundries and the like entering the inner 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 the axial direction.

[0117] As shown in Figure 8 , the structures of the two end connecting assemblies 3 are mirror-symmetrical. At this time, since the structures of the two end connecting assemblies 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 connecting assemblies 3 are arranged in mirror symmetry, the stress between the two end connecting assemblies 3 and the main shaft 1, the first housing 300 and the second housing 400 is uniform during the rotation of the folding mechanism 100, which is beneficial to improve the reliability of the folding mechanism 100. In other embodiments, the structures of the two end connecting assemblies 3 can also be different. In other embodiments, the embodiments of the present application can also only provide one end connecting assembly 3 at one end of the folding mechanism 100. It can be understood that the structure of the folding mechanism 100 can have various combinations and transformations, and the embodiments of the present application do not strictly limit this.

[0118] Figure 9 As shown in Figure 8 , the folding mechanism 100 is a partially exploded view in an embodiment.

[0119] As shown in Figure 8 and Figure 9 , in some embodiments, the main shaft 1 includes a base 11 and an upper cover 12.

[0120] The base 11 is an integral structure. The base 11 includes a first end portion 11a, a middle portion 11b and a second end portion 11c connected in sequence. The first end portion 11a and the second end portion 11c of the base 11 can be used to connect the two end connecting assemblies 3 respectively. The middle portion 11b of the base 11 can be used to connect the middle connecting assembly 2. It can be understood that, in order to clearly and conveniently describe the specific structure of the base 11, Figure 9 the first end portion 11a, the middle portion 11b and the second end portion 11c are schematically distinguished by the dashed line frame.

[0121] It can be understood that the first end portion 11a of the base 11 and the second end portion 11c of the base 11 can be the same or similar structure, symmetrical or partially symmetrical structure, or different structure. Exemplarily, the first end portion 11a of the base 11 and the second end portion 11c of the base 11 are symmetrical structure. The structure of the first end portion 11a and the second end portion 11c of the base 11 can be determined according to the structure of the end connecting assembly 3. The specific application is not limited.

[0122] 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. Among them, 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.

[0123] Figure 10 As shown in Figure 9 , the middle portion 11b of the base 11 is an enlarged schematic view of an embodiment.

[0124] As shown in Figure 10 , the middle portion 11b of the base 11 is provided with a first groove 111a, a second groove 111b and a receiving groove 112.

[0125] Exemplarily, the first groove 111a and the second groove 111b can both penetrate the back surface 11e of the base 11. The bottom wall of the first groove 111a and the second groove 111b can be an arc surface, that is, the first groove 111a and the second groove 111b both include an arc bottom wall. It can be understood that the first groove 111a penetrating the back surface 11e of the base 11 can be that the first groove 111a forms an opening in the back surface 11e of the base 11. If there is a related description below, it can be referred to here. The specific description will not be repeated below.

[0126] Exemplarily, the receiving groove 112 can be located between the first groove 111a and the second groove 111b, and communicate the first groove 111a and the second groove 111b. The receiving groove 112 can penetrate the back surface 11e of the base 11.

[0127] Exemplarily, the middle portion 11b of the base 11 is further provided with a first avoiding groove 113. The first avoiding groove 113 is located in the first groove 111a. The first avoiding groove 113 forms an opening in the bottom wall of the first groove 111a, and the first avoiding groove 113 communicates with the receiving groove 112.

[0128] Exemplarily, the middle portion 11b of the base 11 is further provided with a second avoiding groove 114. The second avoiding groove 114 is located in the second groove 111b. The second avoiding groove 114 forms an opening in the bottom wall of the second groove 111b, and the second avoiding groove 114 communicates with the receiving groove 112.

[0129] Exemplarily, the middle part 11b of the base 11 can also be provided with a plurality of fastening holes 115. The fastening holes 115 of the base 11 can be blind holes, and the fastening holes 115 of the base 11 can penetrate the back surface 11e of the base 11, and can not penetrate the front surface 11d of the base 11.

[0130] As shown in Figure 10 , the middle part 11b of the base 11 includes a rotating shaft 116, a first limiting block 117 and a second limiting block 118.

[0131] Exemplarily, the rotating shaft 116 can be located in the accommodating groove 112, and at this time, the rotating shaft 116 protrudes from the bottom wall of the accommodating groove 112. In an embodiment, the rotating shaft 116 can be located in the middle part 11b of the accommodating groove 112.

[0132] Exemplarily, the first limiting block 117 and the second limiting block 118 are both located in the accommodating groove 112. At this time, the first limiting block 117 and the second limiting block 118 protrude from the bottom wall of the accommodating groove 112 at intervals. The first limiting block 117 and the second limiting block 118 can be located on both sides of the rotating shaft 116. It can be understood that the first limiting block 117 and the second limiting block 118 of the base 11 can divide the accommodating groove 112 into a first sub-groove 112a and a second sub-groove 112b which are in communication with each other. A part of the rotating shaft 116 is located in the first sub-groove 112a, and a part of the rotating shaft 116 is located in the second sub-groove 112b.

[0133] Figure 11 As shown in Figure 9 , another angle structural schematic view of the upper cover 12.

[0134] 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.

[0135] Exemplarily, the bottom surface 12b of the upper cover 12 includes a first arc surface 121 and a second arc surface 122 which are arranged at intervals.

[0136] Exemplarily, the upper cover 12 is provided with a first avoiding hole 123. The first avoiding hole 123 penetrates the top surface 12a and the bottom surface 12b of the upper cover 12. The first avoiding hole 123 is located between the first arc surface 121 and the second arc surface 122.

[0137] Exemplarily, the upper cover 12 is provided with a fixing hole 124. The fixing hole 124 penetrates the top surface 12a and the bottom surface 12b of the upper cover 12. The fixing hole 124 is arranged at intervals with the first avoiding hole 123. The fixing hole 124 is also located between the first arc surface 121 and the second arc surface 122.

[0138] Exemplarily, the upper cover 12 is provided with a receiving groove 125. The receiving groove 125 penetrates the bottom surface 12b of the upper cover 12. The receiving groove 125 is located between the first arc surface 121 and the second arc surface 122.

[0139] Exemplarily, the upper cover 12 can also be provided with a plurality of fastening holes 126. The fastening holes 126 of the upper cover 12 can be through holes, and the fastening holes 126 of the upper cover 12 can penetrate the top surface 12a and the bottom surface 12b of the upper cover 12.

[0140] Figure 12 is Figure 8 A partial structure schematic diagram of the folding mechanism 100 at a C-C line of an embodiment is shown in Figure 1 .

[0141] Referring to Figure 10 , and combining Figure 11 and Figure 13 , the upper cover 12 is fixed on the base 11. Among them, the bottom surface 12b of the upper cover 12 faces the back surface 11e of the base 11. Exemplarily, the plurality of fastening holes 115 of the base 11 are aligned with the plurality of fastening holes 126 of the upper cover 12 one by one. The fastening members pass through the fastening holes 115 of the base 11 and the fastening holes 126 of the upper cover 12, so that the upper cover 12 is locked on the base 11. Among them, the fastening members can include screws, bolts, rivets or pins, etc.

[0142] Exemplarily, the rotating shaft 116 of the base 11 can pass through the fixing hole 124 of the upper cover 12. At this time, a part of the rotating shaft 116 is located in the fixing hole 124. It can be understood that through the cooperation of the rotating shaft 116 and the fixing hole 124, the connection between the upper cover 12 and the base 11 can be more firm, that is, the connection stability between the upper cover 12 and the base 11 is better.

[0143] Figure 12 is Figure 13 A partial cross-sectional schematic diagram of the main shaft 1 at a D-D line of an embodiment is shown in

[0144] As shown in Figure 14 , after the upper cover 12 and the base 11 are fixed to each other, the first arc surface 121 of the upper cover 12 is spaced apart from the arc-shaped bottom wall of the first recess 111a of the base 11, and the first arc surface 121 of the upper cover 12 and the first recess 111a of the base 11 form the first arc-shaped groove 13 of the main shaft 1.

[0145] Figure 12 is Figure 15 A partial cross-sectional schematic diagram of the main shaft 1 at a D-D line of an embodiment is shown in

[0146] The second arc surface 122 of the upper cover 12 is spaced apart from the arc bottom wall of the second groove 111b of the base 11, and the second arc surface 122 of the upper cover 12 and the second groove 111b of the base 11 form the second arc-shaped groove 14 of the main shaft 1.

[0147] Figure 12 is Figure 15 a partial cross-sectional view of an embodiment of the main shaft 1 at the E-E line.

[0148] As Figure 15 shown, after the upper cover 12 and the base 11 are fixed to each other, a part of the bottom surface 12b of the upper cover 12 and the first sub-groove 112a of the accommodating groove 112 form the first accommodating space 15 of the main shaft 1, and a part of the bottom surface 12b of the upper cover 12 and the second sub-groove 112b of the accommodating groove 112 form the second accommodating space 16 of the main shaft 1. Among them, the first accommodating space 15 and the second accommodating space 16 are communicated, and form an accommodating space 150, that is, the accommodating space 150 includes the first accommodating space 15 and the second accommodating space 16. In addition, the first avoiding hole 123 of the upper cover 12 is communicated with the first accommodating space 15 and / or the second accommodating space 16. At this time, the first avoiding hole 123 can be communicated with the accommodating space 150.

[0149] As Figure 16 shown, a part of the rotating shaft 116 can be located in the first accommodating space 15, and a part can be located in the second accommodating space 16.

[0150] Figure 8 is Figure 16 a partial exploded view of an embodiment of the middle connecting assembly 2.

[0151] As Figure 17 shown, 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-in assembly 25, a first damping piece 26a, a second damping piece 26b, a third damping piece 26c and a fourth damping piece 26d. Exemplarily, the plug-in assembly 25 includes a first plug pin 251, a second plug pin 252, a synchronous gear 253 and a spring sheet 254.

[0152] Figure 16 is Figure 17 a partial structure diagram of an embodiment of the middle connecting assembly 2.

[0153] As Figure 18 shown, the first fixing frame 21 includes a bottom plate 211, a sliding block 212, a first guide rail block 213a, a second guide rail block 213b, a first protruding block 214a, a second protruding block 214b and a first guide column 215a.

[0154] Exemplarily, the bottom plate 211 of the first fixing frame 21 comprises a first face 216a and a second face 216b arranged oppositely.

[0155] Exemplarily, the sliding block 212 is protruded on the first face 216a of the bottom plate 211 of the first fixing frame 21. The length extension direction of the sliding block 212 can be the X-axis. In an embodiment, the sliding block 212 is substantially in the shape of a "T".

[0156] Exemplarily, the first protruding block 214a is protruded on the first face 216a of the bottom plate 211 of the first fixing frame 21. The first protruding block 214a is located on one side of the sliding block 212 and is arranged spaced apart from the sliding block 212. The space between the first protruding block 214a and the sliding block 212 is the first space 217a.

[0157] Exemplarily, the first guide column 215a is protruded on the surface of the first protruding block 214a facing the sliding block 212. The first guide column 215a is located in the first space 217a. The number of the first guide column 215a can be two. The two first guide columns 215a are arranged spaced apart.

[0158] Exemplarily, the first guide rail block 213a is protruded on the first face 216a of the bottom plate 211 of the first fixing frame 21. The first guide rail block 213a is located between the sliding block 212 and the first protruding block 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 an embodiment, the number of the first guide rail block 213a can be two, and the two first guide rail blocks 213a can be arranged spaced apart along the X-axis direction. The first guide grooves 218a of the two first guide rail blocks 213a are arranged oppositely.

[0159] Exemplarily, the second protruding block 214b is protruded on the first face 216a of the bottom plate 211 of the first fixing frame 21. The second protruding block 214b is located on the side of the sliding block 212 away from the first protruding block 214a and is arranged spaced apart from the sliding block 212. The space between the second protruding block 214b and the sliding block 212 is the second space 217b.

[0160] Exemplarily, the second guide block 213b is protruded on the first surface 216a of the bottom plate 211 of the second fixing frame 22. The second guide block 213b is located between the sliding block 212 and the second protrusion 214b, i.e., the second guide block 213b is located in the second space 217b. The length extension direction of the second guide block 213b can be the Y-axis direction. The second guide 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 an embodiment, the number of the second guide blocks 213b can be two, and the two second guide blocks 213b can be arranged in the X-axis direction. The second guide grooves 218b of the two second guide blocks 213b are oppositely arranged.

[0161] It can be understood that the second fixing frame 22 and the first fixing frame 21 can be the same or similar structure, symmetrical or partially symmetrical structure, or different structure. In the embodiment, the second fixing frame 22 and the first fixing frame 21 are symmetrical structures, and 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 of the components and other structures outside the assembly can refer to the related solutions of the first fixing frame 21, while allowing the second fixing frame 22 and the first fixing frame 21 to be slightly different in the detailed structure or position arrangement of the components. Specifically, it will not be described here.

[0162] Figure 16 is Figure 18 The first connecting arm 23 and the second connecting arm 24 are shown in a structural schematic diagram of an embodiment.

[0163] As Figure 18 shown, 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 can be understood that the embodiment is described by taking the first connecting end 231 of the first connecting arm 23 as the rotating end and the second connecting end 232 as the sliding end. In other embodiments, the movement mode of the first connecting end 231 and the second connecting end 232 of the first connecting arm 23 is not specifically limited.

[0164] Exemplarily, the first connecting end 231 of the first connecting arm 23 is in an arc shape. The first connecting end 231 of the first connecting arm 23 includes a top surface 231a and a bottom surface 231b arranged oppositely, and a first side surface 231c and a second side surface 231d arranged oppositely. 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, the top surface 231a and the bottom surface 231b of the first connecting end 231 can both be arc surfaces. The first side surface 231c and the second side surface 231d of the first connecting end 231 can both be planes and in an arc shape.

[0165] For example, 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, bottom surface 231b and 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 bottom surface 231b of the first connecting end 231.

[0166] It is understandable that the cross-sectional shape of the first slot 2311 is not limited to Figure 18 The cross-sectional shape of the first slot 2311 can also be a rectangle, a semicircle, a triangle, or an irregular shape, as shown in the diagram.

[0167] like Figure 19 As shown, the second connecting end 232 of the first connecting arm 23 is provided with a first sliding groove 2321, which can penetrate through the bottom surface and the side surface 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 shape of the first sliding groove 2321 can be "T".

[0168] It is understood that the second connecting arm 24 and the first connecting arm 23 in this embodiment may have the same or similar structure, be symmetrical or partially symmetrical, or have 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 components, and the design of the connection relationship between components and other structures besides the assembly can all refer to the relevant scheme 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, and the second slot 2411 can penetrate through the second side surface 241d of the third connecting end 241 (the second side surface 241d of the third connecting end 241 faces the same direction as the second side surface 231d of the first connecting end 231 of the first connecting arm 23), etc. At the same time, it is also permissible for the second connecting arm 24 and the first connecting arm 23 to have slight differences in the detailed structure or positional arrangement of the components. Specific details will not be elaborated here. In this embodiment, the third connecting end 241 of the second connecting arm 24 is used as a rotating end and the fourth connecting end 242 is used as a sliding end. In other embodiments, the movement of the third connecting end 241 and the fourth connecting end 242 of the second connecting arm 24 is not specifically limited.

[0169] Figure 8 yes Figure 2 The folding mechanism 100 shown is partially structurally illustrated in one embodiment. Figure 20 . Figure 8 yesFigure 3 The folding mechanism 100 shown is partially structurally illustrated in one embodiment. Figure 21 . Figure 20 yes Figures 19 to 21 A partial cross-sectional view of one embodiment of the folding mechanism 100 at line FF.

[0170] like Figures 19 to 21 As shown, the first connecting end 231 of the first connecting arm 23 is rotatably connected to the main shaft 1. Exemplarily, 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. 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 structure is relatively simple, occupies little space, and is beneficial for reducing the thickness of the folding mechanism 100, making it easier to achieve a thinner and lighter design for the folding mechanism 100 and the electronic device 1000. In other embodiments, the first connecting end 231 of the first connecting arm 23 can also be connected to the main shaft 1 via a real axis; this application does not strictly limit this.

[0171] like Figure 18 As shown, the second connecting end 232 of the first connecting arm 23 is slidably connected to the first fixing frame 21. Exemplarily, at least a portion of the slider 212 of the first fixing frame 21 can be located in the first groove 2321 of the second connecting end 232. Figure 18 The structure of the first slide 2321 is also illustrated; please refer to the documentation for details. Figures 19 to 21 It is understood that, in this embodiment, by setting the shape of the slider 212 of the first fixing frame 21 and the first groove 2321 of the second connecting end 232 to a "T" shape, the first connecting arm 23 can slide relative to the first fixing frame 21 in the X-axis direction by utilizing the mutual cooperation between the slider 212 of the first fixing frame 21 and the first groove 2321 of the second connecting end 232, so that there will be no separation problem in the Y-axis and Z-axis directions.

[0172] like Figures 19 to 21 As shown, the third connecting end 241 of the second connecting arm 24 is rotatably connected to the main shaft 1. It can be understood that the connection method between the third connecting end 241 of the second connecting arm 24 and the main shaft 1 can be referenced to the connection method between the first connecting end 231 of the first connecting arm 23 and the main shaft 1. Specific details will not be elaborated here.

[0173] Furthermore, the fourth connecting end 242 of the second connecting arm 24 is slidably connected to the second fixed frame 22. It can be understood that the connection method between the fourth connecting end 242 of the second connecting arm 24 and the second fixed frame 22 can be referenced to the connection method between the second connecting end 232 of the first connecting arm 23 and the first fixed frame 21. Specific details will not be elaborated here.

[0174] like Figure 20 As shown, the first fixing frame 21 can be connected to the main spindle 1 via the first connecting arm 23, and the second fixing frame 22 can be connected to the main spindle 1 via the second connecting arm 24. The main spindle 1 can be located between the first fixing frame 21 and the second fixing frame 22.

[0175] like Figure 21 and Figure 19 As shown, 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 both sides of the main shaft 1, and the first fixing frame 21 and the second fixing frame 22 unfold relative to the main shaft 1. Exemplarily, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 can be approximately 180° apart. In other embodiments, the main shaft 1, the first fixing frame 21, and the second fixing frame 22 may also deviate slightly from 180°, for example, by 165°, 177°, or 185°.

[0176] Furthermore, when the folding mechanism 100 is in the flattened state, most 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 small portion of the slider 212 of the first fixing frame 21 is located within the first sliding groove 2321 of the second connecting end 232 of the first connecting arm 23. It can be understood that the state of the second connecting arm 24 when the folding mechanism 100 is in the flattened state can be referred to the state of the first connecting arm 23 when the folding mechanism 100 is in the flattened state. Specific details are not elaborated in this embodiment.

[0177] like Figure 22 As shown, 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 opposite to the first clearance groove 113 of the base 11, and the second slot 2411 of the third connecting end 241 of the second connecting arm 24 is opposite to the second clearance groove 114 of the base 11. It is understood that in this application, the opposite arrangement of components A and B can be such that component A is projected along the target direction to obtain projection C, and component B is projected along the target direction to obtain projection D, and projection C and projection D can at least largely overlap. In some embodiments, the majority overlap can be any of the following: projection C is completely located within projection D; or projection D is completely located within projection C; or projection C and projection D intersect each other, and the intersection area of ​​projection C and projection D accounts for more than 50% of projection C or projection D.

[0178] Figure 21 is Figure 22 a partial cross-sectional view of the folding mechanism 100 in the folded state.

[0179] As Figure 22 shown, when the folding mechanism 100 is in the folded state, the first fixed frame 21 and the second fixed frame 22 are located on the same side of the main shaft 1, the first fixed frame 21 and the second fixed frame 22 are close to each other, and the first fixed frame 21 and the second fixed frame 22 are closed relative to the main shaft 1. Exemplarily, the main shaft 1, the first fixed frame 21 and the second fixed frame 22 can roughly form a “U” shape. In other embodiments, the main shaft 1, the first fixed frame 21 and the second fixed frame 22 can also form other shapes, which are not limited in particular.

[0180] As Figure 18 shown, when the folding mechanism 100 is in the folded state, a small part of the first connecting end 231 of the first connecting arm 23 is located in the first arc-shaped slot 13 of the main shaft 1. A large part of the sliding block 212 of the first fixed frame 21 is located in the first sliding slot 2321 (see Figure 23 ) of the second connecting end 232 of the first connecting arm 23. It can be understood that the state of the second connecting arm 24 when the folding mechanism 100 is in the folded state can refer to the state of the first connecting arm 23 when the folding mechanism 100 is in the folded state. Details of this embodiment are not repeated.

[0181] Figure 22 is Figure 23 a partial cross-sectional view of an embodiment of the folding mechanism 100 at G-G line.

[0182] As Figure 21 shown, in an embodiment, when the folding mechanism 100 is in the folded state, the first insertion slot 2311 of the first connecting end 231 of the first connecting arm 23 and the first avoiding slot 113 of the base 11 can be staggered, that is, not arranged opposite to each other. The arrangement mode of the second insertion slot 2411 of the third connecting end 241 of the second connecting arm 24 and the second avoiding slot 114 of the base 11 can refer to the arrangement mode of the first insertion slot 2311 of the first connecting end 231 of the first connecting arm 23 and the first avoiding slot 113 of the base 11. Details are not repeated here.

[0183] Please refer to Figure 22 and Figure 18 , and in combination with Figure 21As shown, when the folding mechanism 100 folds 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.

[0184] Please see Figure 22 and Figure 18 and combined Figure 24 As shown, when the folding mechanism 100 unfolds 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.

[0185] Figure 16 yes Figure 24 The diagram shows the structure of the first pin 251 at different angles in one embodiment.

[0186] like Figure 24 As shown, the first pin 251 includes a first body portion 2511, a first insertion portion 2512, a pushing portion 2513, a first engaging portion 2514, and a first limiting portion 2515. It can be understood that the first pin 251 in this embodiment is a one-piece molded structure. To clearly and conveniently describe the specific structure of the first pin 251, Figure 24 The first body portion 2511 and the first insertion portion 2512 are schematically distinguished by dashed lines. In other embodiments, the first pin 251 may also adopt other structures. For example, the first pin 251 may not include the first engaging portion 2514 and the first limiting portion 2515.

[0187] For example, 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.

[0188] like Figure 23 As shown, the pushing part 2513 may protrude from the top surface 2517 of the first body part 2511. The shape of the pushing part 2513 is not limited to... Figure 24The shape is an "L" as shown. In other embodiments, the shape of the pushing part 2513 may also be cylindrical, rectangular, irregular, etc.

[0189] like Figure 24 As shown, the first insertion portion 2512 may protrude from the side 2516 of the first body portion 2511. The shape of the first insertion portion 2512 is not limited to... Figure 24 The shape is a trapezoid as shown. In other embodiments, the first insertion part 2512 may also be cylindrical, rectangular, irregular, etc.

[0190] like Figure 24 As shown, the first engaging portion 2514 may protrude from the side 2516 of the first body portion 2511 and be spaced apart from the first insertion portion 2512. It is understood that the number of engaging teeth in the first engaging portion 2514 is not limited to... Figure 24 The three shown are intended. The specific quantity can be determined according to requirements.

[0191] like Figure 25 As shown, the first limiting part 2515 may protrude from the side 2516 of the first body part 2511 and be located on one side of the first engaging part 2514. At this time, the first limiting part 2515 may cover the first engaging part 2514.

[0192] For example, the top surface of the first limiting part 2515 may be flush with the top surface of the first body part 2511.

[0193] Figure 8 yes Figure 4 The folding mechanism 100 shown is partially structurally illustrated in one embodiment. Figure 26 . Figure 8 yes Figure 5 The folding mechanism 100 shown is partially structurally illustrated in one embodiment. Figure 25 .in, Figure 26 It can be Figure 25 The structural diagram of the upper cover 12 is hidden.

[0194] like Figure 26 and Figure 25 As shown, at least a portion of the first pin 251 is located within the first receiving space 15 of the spindle 1. The first pin 251 is movably connected to the spindle 1. Exemplarily, the first pin 251 is slidably connected to the spindle 1.

[0195] It can be understood that the first pin 251 is limited in the X-axis direction and the Z-axis direction by the cooperation of the base 11 and the upper cover 12, and is allowed to slide in the Y-axis direction relative to the main shaft 1. For example, the left part of the base 11 cooperates with the first limiting block 117 and the second limiting block 118 to limit the first pin 251 in the X-axis direction. The bottom of the base 11 cooperates with the upper cover 12 to limit the first pin 251 in the Z-axis direction.

[0196] Exemplarily, the first body part 2511 of the first pin 251 is movably connected to the main shaft 1. The top surface 2517 of the first body part 2511 of the first pin 251 is oriented in the same direction as the back surface 11e of the base 11 of the main shaft 1. It can be understood that the first body part 2511 is arranged between the bottom of the base 11 and the upper cover 12. The first body part 2511 is limited in the Z-axis direction by the cooperation of the bottom of the base 11 and the upper cover 12. In addition, the first body part 2511 is arranged between the left part of the base 11 and the first limiting block 117 and the second limiting block 118. The first body part 2511 is limited in the X-axis direction by the cooperation of the left part of the base 11 and the first limiting block 117 and the second limiting block 118.

[0197] Exemplarily, the first insertion part 2512 of the first pin 251 is arranged towards the first connecting arm 23. The first engaging part 2514 is located between the first limiting part 2515 and the bottom of the base 11. In addition, a part of the pushing part 2513 passes through the first avoiding hole 123 of the upper cover 12 from the containing space 150 and extends to the outside of the main shaft 1.

[0198] It can be understood that in the present embodiment, when the electronic device 1000 is in the unfolded state, the electronic device 1000 also has two sub-states, that is, 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.

[0199] As shown in Figure 26 and Figure 10 When the first pin 251 is in the unlocked state, at least part of the first insertion part 2512 of the first pin 251 is not inserted into the first slot 2311 of the first connecting arm 23, that is, at least part of the first insertion part 2512 of the first pin 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.

[0200] Exemplarily, when the main shaft 1 is provided with the first avoiding slot 113, a part of the first insertion part 2512 of the first pin 251 can also not be inserted into the first avoiding slot 113 of the main shaft 1.Figure 19 and Figure 10 The structure of the first avoiding slot 113 is also shown, and in particular, reference can be made to Figure 19 and Figure 27 ) and a part of the first inserting part 2512 of the first latch 251 is located outside the first avoiding slot 113.

[0201] Figure 25 is Figure 27 A partial structure diagram of the electronic device 1000 in the locked state is shown.

[0202] As shown in Figure 25 When the electronic device 1000 is in the locked state, at least part of the first inserting part 2512 of the first latch 251 is inserted into the first inserting slot 2311 of the first connecting arm 23.

[0203] Exemplarily, when the main shaft 1 is provided with the first avoiding slot 113, a part of the first inserting part 2512 of the first latch 251 is also inserted into the first avoiding slot 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.

[0204] As shown in Figure 27 and Figure 25 When the first latch 251 switches from the unlocked state to the locked state, the first latch 251 slides relative to the main shaft 1 along the negative direction of the Y axis, and the first inserting part 2512 of the first latch 251 can be inserted into the first inserting slot 2311 of the first connecting arm 23 along the negative direction of the Y axis.

[0205] As shown in Figure 27 and Figure 28 When the first latch 251 switches from the locked state to the unlocked state, the first latch 251 slides relative to the main shaft 1 along the positive direction of the Y axis, and the first inserting part 2512 of the first latch 251 can be extended from the first inserting slot 2311 of the first connecting arm 23 along the positive direction of the Y axis.

[0206] It can be understood that, by arranging the first latch 251 in the main shaft 1, at least part of the first inserting part 2512 of the first latch 251 can be inserted into the first inserting slot 2311 of the first connecting arm 23 when the electronic device 1000 is in the unfolded state. In this way, the first connecting arm 23 no longer rotates relative to the main shaft 1. The first fixing frame 21 also no longer rotates relative to the main shaft 1. At this time, the main shaft 1, the first fixing frame 21 and the second fixing frame 22 can be kept at a certain angle, for example, 180°. The stability and reliability of the unfolded state of the folding mechanism 100 are better.

[0207] It can be understood that the first avoiding slot 113 is arranged in the first arc-shaped slot 13, so that a part of the first inserting part 2512 of the first plug pin 251 can be inserted into the first avoiding slot 113 when the electronic device 1000 is in the unfolded state. The first avoiding slot 113 can be used to avoid the interference between the first plug pin 251 and the bottom wall of the first arc-shaped slot 13. In addition, the first avoiding slot 113 can also limit the first plug pin 251 in the X-axis direction to some extent, so that the stability of the first plug pin 251 is better.

[0208] It can be understood that the first plug pin 251 can be movably connected to the main shaft 1. For example, the first plug pin 251 can slide relative to the main shaft 1 along the Y-axis direction. There are two driving modes for driving the first plug pin 251 to move relative to the main shaft 1, one is manual driving, and the other is mechanical driving. The manual driving can be that when the electronic device 1000 is in the unfolded state, the user can pull the pushing part 2513 of the first plug pin 251 to make the first plug pin 251 move along the Y-axis direction, so that the first inserting part 2512 of the first plug pin 251 is inserted into or moved out of the first inserting slot 2311 of the first connecting arm 23. The mechanical driving can be that the first plug pin 251 is connected with a driving mechanism, and the driving mechanism is used to drive the first plug pin 251 to move along the Y-axis direction, so that the first inserting part 2512 of the first plug pin 251 can be inserted into or moved out of the first inserting slot 2311 of the first connecting arm 23. The driving mechanism can include a motor, a transmission assembly and the like. The driving mechanism can be arranged in the main shaft 1. It can be understood that the specific structure of the driving mechanism is not limited in the present application.

[0209] Figure 16 is Figure 28 The second plug pin 252 is shown in another angle of the structural schematic view of an embodiment.

[0210] As Figure 28 shown, the second plug pin 252 includes a second body part 2521, a second inserting part 2522, a convex part 2523, a second engaging part 2524 and a second limiting part 2525. It can be understood that the second plug pin 252 of the present embodiment is an integral structure. In order to clearly and conveniently describe the specific structure of the second plug pin 252, Figure 28 The second body part 2521 and the second inserting part 2522 are schematically distinguished by the dashed line. In other embodiments, the second plug pin 252 can also adopt other structures. For example, the second plug pin 252 can also not include the second engaging part 2524 and the second limiting part 2525.

[0211] For example, 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.

[0212] like Figure 28 As shown, the protrusion 2523 may protrude from the top surface 2527 of the second body portion 2521. The shape of the protrusion 2523 is not limited to... Figure 28 The shape shown is an arch. In other embodiments, the shape of the protrusion 2523 may also be cylindrical, rectangular, irregular, etc.

[0213] like Figure 28 As shown, the second insertion portion 2522 may protrude from the side 2526 of the second body portion 2521. The shape of the second insertion portion 2522 is not limited to... Figure 28 The shape is a trapezoid as shown. In other embodiments, the second insertion part 2522 may also be cylindrical, rectangular, irregular, etc.

[0214] like Figure 28 As shown, the second engaging portion 2524 may protrude from the side 2526 of the second body portion 2521 and be spaced apart from the second insertion portion 2522. It is understood that the number of engaging teeth in the second engaging portion 2524 is not limited to... Figure 28 The three shown are intended. The specific quantity can be determined according to requirements.

[0215] like Figure 29 As shown, the second limiting part 2525 may protrude from the side 2526 of the second body part 2521 and be located on one side of the second engaging part 2524. At this time, the second limiting part 2525 may cover the second engaging part 2524.

[0216] For example, the top surface of the second limiting portion 2525 may be flush with the top surface of the second body portion 2521.

[0217] Figure 8 yes Figure 6 The folding mechanism 100 shown is partially structurally illustrated in one embodiment. Figure 29 .

[0218] like Figure 29 As shown, exemplarily, at least a portion of the second pin 252 is located within the second receiving space 16 of the spindle 1. The second pin 252 is spaced apart from the first pin 251. The second pin 252 is movably connected to the spindle 1. Exemplarily, the second pin 252 is slidably connected to the spindle 1. It is understood that this arrangement is intended to more clearly illustrate the positional relationships between the second pin 252, the synchronizing gear 253, and other components. Figure 26 The top cover 12 of the main spindle 1 is hidden.

[0219] It can be understood that the second pin 252 is limited in the X-axis direction and the Z-axis direction by the cooperation of the base 11 and the upper cover 12, and is allowed to slide relative to the main shaft 1 in the Y-axis direction. For example, the right edge of the base 11 cooperates with the first limiting block 117 and the second limiting block 118 to limit the second pin 252 in the X-axis direction. The bottom of the base 11 cooperates with the upper cover 12 to limit the second pin 252 in the Z-axis direction.

[0220] Exemplarily, the first connecting end 231 and the third connecting end 241 are arranged along the Y-axis direction, and the first pin 251 and the second pin 252 are located between the first connecting end 231 and the third connecting end 241, and the first pin 251 and the second pin 252 are arranged along the X-axis direction. In this way, the arrangement of the first connecting end 231, the third connecting end 241, the first pin 251 and the second pin 252 on the main shaft 1 is relatively compact, and the space utilization rate is relatively high. It can be understood that the arrangement of the first pin 251 and the second pin 252 along the X-axis direction includes two cases. One case is that most of the first pin 251 and most of the second pin 252 are arranged along the X-axis direction, and a small part of the first pin 251 and a small part of the second pin 252 have an overlapping area in the Y-axis direction. The other case is that the entire first pin 251 and the entire second pin 252 are arranged along the X-axis direction.

[0221] Exemplarily, the second body part 2521 of the second pin 252 is movably connected to the main shaft 1. The top surface 2527 of the second body part 2521 of the second pin 252 faces the same direction as the back surface 11e of the base 11 of the main shaft 1. It can be understood that the second body part 2521 is arranged between the bottom of the base 11 and the upper cover 12. The bottom of the base 11 cooperates with the upper cover 12 to limit the second body part 2521 in the Z-axis direction. In addition, the second body part 2521 is arranged between the right edge of the base 11 and the first limiting block 117 and the second limiting block 118. The right edge of the base 11 cooperates with the first limiting block 117 and the second limiting block 118 to limit the second body part 2521 in the X-axis direction.

[0222] Exemplarily, the second insertion part 2522 of the second pin 252 is arranged towards the second connecting arm 24. The convex part 2523 is located between the second body part 2521 and the upper cover 12 (see Figure 29 ). In addition, the second engagement part 2524 is located between the second limiting part 2525 and the bottom of the base 11.

[0223] As Figure 29As shown, the synchronization gear 253 is located on the main shaft 1, and the synchronization gear 253 is rotationally connected to the rotating shaft 116 of the base 11. Exemplarily, the synchronization gear 253 can be sleeved on the rotating shaft 116 of the base 11. At this time, a part of the synchronization gear 253 can be located in the first accommodating space 15, and a part can be located in the second accommodating space 16.

[0224] As shown, Figure 28 the first pin 251, the second pin 252 and the synchronization gear 253 are all located in the accommodating space 150, and the synchronization gear 253 can be engaged with the first engagement part 2514 of the first pin 251, and can also be engaged with the second engagement part 2524 (see Figure 28 , Figure 29 the structure of the second engagement part 2524 is also shown from other angles) of the second pin 252. In other words, the second engagement part 2524 engages the first engagement part 2514 through the synchronization gear 253.

[0225] Exemplarily, a part of the synchronization gear 253 is located between the first limiting part 2515 of the first pin 251 and the bottom of the base 11. A part of the synchronization gear 253 is located between the second limiting part 2525 of the second pin 252 and the bottom of the base 11. In this way, the bottom of the base 11 cooperates with the first limiting part 2515 of the first pin 251 and the second limiting part 2525 of the second pin 252 to limit the synchronization gear 253 in the Z-axis direction.

[0226] It can be understood that when the electronic device 1000 is in the unlocked state, the second connecting arm 24 can also no longer rotate relative to the main shaft 1. When the electronic device 1000 is in the locked state, the second connecting arm 24 can also rotate relative to the main shaft 1.

[0227] As shown, Figure 10 when the second pin 252 is in the unlocked state, at least part of the second insertion part 2522 of the second pin 252 is not inserted into the second slot 2411 of the second connecting arm 24, that is, at least part of the second insertion part 2522 of the second pin 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.

[0228] Exemplarily, when the main shaft 1 is provided with the second avoiding slot 114, a part of the second insertion part 2522 of the second pin 252 can also not be inserted into the second avoiding slot 114 Figure 10 the structure of the second avoiding slot 114 is also shown, and details can be referred to Figure 30 ) of the main shaft 1, that is, a part of the second insertion part 2522 of the second pin 252 is located outside the second avoiding slot 114.

[0229] Figure 29 is Figure 30 The folding mechanism 100 is shown in a structural schematic diagram of an embodiment. It can be understood that, in order to more clearly show the positional relationship and connection relationship between the first latch 251, the second latch 252, the synchronous gear 253 and other components, Figure 30 The upper cover 12 is hidden.

[0230] As Figure 29 shown, when the second latch 252 is in the locked state, at least part of the second insertion part 2522 of the second latch 252 is inserted into the second insertion 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.

[0231] Exemplarily, when the main shaft 1 is provided with the second avoiding slot 114, part of the second insertion part 2522 of the second latch 252 is also inserted into the second avoiding slot 114 of the main shaft 1.

[0232] As Figure 30 and Figure 28 shown, when the electronic device 1000 switches from the locked state to the unlocked state, an action force along the positive direction of the Y axis (for example, the pushing part 2513 is pushed along the positive direction of the Y axis) can be applied to the pushing part 2513 of the first latch 251. The first latch 251 slides along the positive direction of the Y axis relative to the main shaft 1, so that the synchronous gear 253 rotates clockwise, and the second engagement part 2524 (see Figure 29 ) of the second latch 252 slides along the negative direction of the Y axis relative to the main shaft 1 along with the rotation of the synchronous gear 253, and the second insertion part 2522 of the second latch 252 can extend out of the second insertion slot 2411 of the second connecting arm 24 along the negative direction of the Y axis.

[0233] As Figure 30 and Figure 28 shown, when the electronic device 1000 switches from the unlocked state to the locked state, an action force along the negative direction of the Y axis (for example, the pushing part 2513 is pushed along the negative direction of the Y axis) can be applied to the pushing part 2513 of the first latch 251. The first latch 251 slides along the negative direction of the Y axis relative to the main shaft 1, so that the synchronous gear 253 rotates counterclockwise, and the second engagement part 2524 (see Figure 31 ) of the second latch 252 slides along the positive direction of the Y axis relative to the main shaft 1 along with the rotation of the synchronous gear 253, and the second insertion part 2522 of the second latch 252 can be inserted into the second insertion slot 2411 of the second connecting arm 24 along the positive direction of the Y axis.

[0234] It can be understood that the driving mode of driving the second pin 252 to move relative to the main shaft 1 is to drive the first pin 251 to move along the Y-axis direction, and then use the synchronous gear 253 to synchronously drive the second pin 252 to move along the Y-axis direction. In other embodiments, the structure of the second pin 252 can also be arranged as the structure of the first pin 251. At this time, the user can directly dial the second pin 252 to make the second pin 252 move along the Y-axis direction. Or directly use the driving mechanism to drive the first pin 251 to move along the Y-axis direction.

[0235] It can be understood that, by arranging the second pin 252 in the main shaft 1, at least part of the second insertion part 2522 of the second pin 252 can be inserted into the second insertion slot of the second connecting arm 24 when the electronic device 1000 is in the unfolded state. In this way, the second connecting arm 24 no longer rotates relative to the main shaft 1. The second fixed frame 22 also no longer rotates relative to the main shaft 1. At this time, the main shaft 1, the first fixed frame 21 and the second fixed frame 22 can be kept at a certain angle, for example 180°. The stability and reliability of the unfolded state of the folding mechanism 100 are better.

[0236] It can be understood that, by arranging the synchronous gear 253 between the first pin 251 and the second pin 252, the first pin 251 is driven to move along the Y-axis direction, and the synchronous gear 253 is used to synchronously drive the second pin 252 to move along the Y-axis direction. In this way, the present embodiment can realize the synchronous movement of the first pin 251 and the second pin 252 by one driving force. The first pin 251 and the second pin 252 are respectively inserted into the first connecting arm 23 and the second connecting arm 24. The structure of the insertion assembly 25 of the present embodiment is relatively simple, which can reduce the assembly difficulty and manufacturing cost. In addition, when the electronic device 1000 is in the locked state, the first pin 251 and the second pin 252 can be respectively inserted into the first connecting arm 23 and the second connecting arm 24 at the same time. Compared with the scheme of separately arranging the first pin 251 to be inserted into the first connecting arm 23 or the second pin 252 to be inserted into the second connecting arm 24, the first fixed frame 21 and the second fixed frame 22 are less likely to rotate relative to the main shaft 1. The main shaft 1, the first fixed frame 21 and the second fixed frame 22 can be better kept at a certain angle, for example 180°. The stability and reliability of the unfolded state of the folding mechanism 100 are better.

[0237] Understandably, by providing a second clearance groove 114 within the second arc-shaped groove 14, this application allows a portion of the second insertion portion 2522 of the second pin 252 to be inserted into the second clearance groove 114 when the electronic device 1000 is in a flattened state. The second clearance groove 114 can prevent interference between the second pin 252 and the bottom wall of the second arc-shaped groove 14. Furthermore, the second clearance groove 114 can also limit the second pin 252 to some extent in the X-axis direction, thereby improving the stability of the second pin 252.

[0238] Figure 8 yes Figure 31 The diagram shows a partial structural view of the folding mechanism 100 from another angle in one embodiment. Wherein, Figure 31 The diagram illustrates the assembly structure in which the spring clip 254 is fixed to the upper cover 12.

[0239] like Figure 31 As shown, 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, etc.

[0240] like Figure 32 As shown, exemplarily, the first straight portion 2541 and the second straight portion 2543 of the spring 254 are both fixed to the side of the upper cover 12 facing the receiving space 150. The bent portion 2542 of the spring 254 protrudes away from the upper cover 12. In other words, the bent portion 2542 of the spring 254 protrudes very close to the second pin 252.

[0241] For example, the first straight portion 2541 and the second straight portion 2543 of the spring piece 254 can be fixed to the upper cover 12 by means of adhesive, welding or other methods.

[0242] For example, 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. For example, 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. In this way, the spring piece 254 and the upper cover 12 have an overlapping area in the Z-axis direction, which can improve space utilization.

[0243] Figure 8 yes Figure 7 The folding mechanism 100 shown is partially structurally illustrated in one embodiment. Figure 31 .

[0244] like Figure 32 and Figure 31 As shown, when the top cover 12 (see also...) Figure 31After being fixed on the base 11, the bending part 2542 of the elastic sheet 254 protrudes towards the second latch 252.

[0245] As shown in Figure 32 and Figure 33 , when the electronic device 1000 is in the unlocked state, i.e. the first latch 251 is separated from the first slot 2311, the protruding part 2523 of the second latch 252 can be located on the side of the bending part 2542 of the elastic sheet 254 away from the third connecting end 241 of the second connecting arm 24. The bending part 2542 of the elastic sheet 254 can be used to block the movement of the second latch 252 in the direction close to the second connecting arm 24, so as to avoid the second connecting arm 24 from being unable to rotate due to the second insertion part 2522 of the second latch 252 being inserted into the second slot 2411 during the rotation of the second connecting arm 24, i.e. to ensure that the second connecting arm 24 can rotate relative to the main shaft 1. It can be understood that, since the bending part 2542 of the elastic sheet 254 can be used to block the movement of the second latch 252 in the direction close to the second connecting arm 24, the second latch 252 will 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, so as to avoid the first connecting arm 23 from being unable to rotate due to the insertion part of the first latch 251 being inserted into the first slot 2311 during the rotation of the first connecting arm 23, i.e. to ensure that the first connecting arm 23 can rotate relative to the main shaft 1.

[0246] Figure 32 As shown in Figure 32 , the folding mechanism 100 is a structural schematic diagram in an embodiment. It can be understood that, in order to more clearly show the connection relationship between the insertion assembly 25 and other assemblies, Figure 33 and Figure 33 , the upper cover 12 is hidden.

[0247] As shown in Figure 34As shown, when the electronic device 1000 is in the locked state, i.e., the first plug 251 is inserted into the first insertion slot 2311, the protrusion 2523 of the second plug 252 can be located on the side of the bent portion 2542 of the elastic sheet 254 close to the third connecting end 241 of the second connecting arm 24. The bent portion 2542 of the elastic sheet 254 can be used to block the movement of the second plug 252 in the direction away from the second connecting arm 24, thereby limiting the second insertion portion 2522 of the second plug 252 from being pulled out of the second insertion slot 2411, ensuring that the second connecting arm 24 no longer rotates relative to the main shaft 1, and improving the connection reliability of the second plug 252 and the second connecting arm 24. It can be understood that, since the bent portion 2542 of the elastic sheet 254 can be used to block the movement of the second plug 252 in the direction away from the second connecting arm 24, the second plug 252 will not drive the synchronous gear 253 to rotate. The synchronous gear 253 will not drive the first plug 251 to move in the direction away from the first connecting arm 23, thereby limiting the first insertion portion 2512 of the first plug 251 from being pulled out of the first insertion slot 2311, and further ensuring that the first connecting arm 23 no longer rotates relative to the main shaft 1, and improving the connection reliability of the first plug 251 and the first connecting arm 23.

[0248] It can be understood that, when the electronic device 1000 switches from the locked state to the unlocked state, the second plug 252 slides relative to the main shaft 1 in the negative direction of the Y axis, the protrusion 2523 of the second plug 252 passes over the bent portion 2542 of the elastic sheet 254, and moves from the side of the bent portion 2542 of the elastic sheet 254 close to the second connecting arm 24 to the side of the bent portion 2542 of the elastic sheet 254 away from the second connecting arm 24. When the electronic device 1000 switches from the unlocked state to the locked state, the second plug 252 slides relative to the main shaft 1 in the positive direction of the Y axis, the protrusion 2523 of the second plug 252 passes over the bent portion 2542 of the elastic sheet 254, and moves from the side of the bent portion 2542 of the elastic sheet 254 away from the second connecting arm 24 to the side of the bent portion 2542 of the elastic sheet 254 close to the second connecting arm 24. Since the elastic sheet 254 has a deformable ability, the elastic sheet 254 releases space by deforming, so that the protrusion 2523 of the second plug 252 can pass over the bent portion 2542 of the elastic sheet 254.

[0249] It can be understood that the above embodiment introduces a setting mode of limiting the movement of the second latch 252 when the plug-in assembly 25 is in the locked state or the unlocked state. In other embodiments, there are various ways to limit the movement of the second latch 252 when the plug-in assembly 25 is in the locked state or the unlocked state, and the specific application is not limited. For example, the second latch 252 can also not include the protruding part 2523. At this time, the bent part 2542 of the elastic sheet 254 can abut against the main body part of the second latch 252. The elastic sheet 254 can exert a pressure on the second latch 252 in the Z-axis direction, thereby increasing the friction between the second latch 252 and the base 11. In this way, when the plug-in assembly 25 is in the locked state, the bent part 2542 of the elastic sheet 254 can prevent the second latch 252 from moving away from the second connecting arm 24, thereby limiting the second insertion part 2522 of the second latch 252 from being pulled out of the second insertion slot 2411, and ensuring that the second connecting arm 24 cannot rotate relative to the main shaft 1. When the plug-in assembly 25 is in the unlocked state, the bent part 2542 of the elastic sheet 254 can be used to block the movement of the second latch 252 towards the second connecting arm 24, thereby avoiding the second connecting arm 24 from being unable to rotate due to the insertion of the insertion part of the second latch 252 into the second insertion slot 2411 during the rotation of the second connecting arm 24, that is, ensuring that the second connecting arm 24 can rotate relative to the main shaft 1.

[0250] It can be understood that the above embodiment introduces a setting mode of limiting the movement of the second latch 252 when the plug-in assembly 25 is in the locked state or the unlocked state. In other embodiments, there are various ways to limit the movement of the second latch 252 when the plug-in assembly 25 is in the locked state or the unlocked state, and the specific application is not limited. For example, the second latch 252 can also not include the protruding part 2523. At this time, the bent part 2542 of the elastic sheet 254 can abut against the main body part of the second latch 252. The elastic sheet 254 can exert a pressure on the second latch 252 in the Z-axis direction, thereby increasing the friction between the second latch 252 and the base 11. In this way, when the plug-in assembly 25 is in the locked state, the bent part 2542 of the elastic sheet 254 can prevent the second latch 252 from moving away from the second connecting arm 24, thereby limiting the second insertion part 2522 of the second latch 252 from being pulled out of the second insertion slot 2411, and ensuring that the second connecting arm 24 cannot rotate relative to the main shaft 1. When the plug-in assembly 25 is in the unlocked state, the bent part 2542 of the elastic sheet 254 can be used to block the movement of the second latch 252 towards the second connecting arm 24, thereby avoiding the second connecting arm 24 from being unable to rotate due to the insertion of the insertion part of the second latch 252 into the second insertion slot 2411 during the rotation of the second connecting arm 24, that is, ensuring that the second connecting arm 24 can rotate relative to the main shaft 1.

[0251] Figure 16 is Figure 35 is a partial exploded view of the first damping member 26a and the second damping member 26b in an embodiment. Figure 16 is Figure 34 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.

[0252] As Figure 35 and Figure 16As shown, the first damping member 26a comprises a first bracket 261a and a first elastic member 262a. The first bracket 261a is a rigid structure, so that it is not easy to deform under external force. Exemplarily, the first bracket 261a comprises a plurality of first fixing columns 263a, a first abutting block 264a and two first sliding blocks 265a. The plurality of 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 plurality of first fixing columns 263a are located between the two first sliding blocks 265a.

[0253] Exemplarily, the first elastic member 262a can comprise a plurality of springs. The number of the springs can be the same as the number of the first fixing columns 263a. The plurality of springs are correspondingly sleeved on the plurality of first fixing columns 263a. Exemplarily, one end of the spring can abut on the first abutting block 264a of the first bracket 261a. It can be understood that the number of the first fixing columns 263a and the springs is not limited to two. In other embodiments, the number of the first fixing columns 263a and the springs is not strictly limited. In other embodiments, one end of the spring can also be fixed on the first abutting block 264a of the first bracket 261a by welding or the like. Figure 36

[0254] It can be understood that the second damping member 26b and the first damping member 26a can be the same or similar structure, symmetrical or partially symmetrical structure, or different structure. In the present embodiment, the second damping member 26b and the first damping member 26a are symmetrical structure, the basic design of the component structure of the second damping member 26b, the connection relationship design between the components, and the connection relationship design of the components and other structures outside the assembly can refer to the related schemes of the first damping member 26a, while allowing the second damping member 26b and the first damping member 26a to be slightly different in the detailed structure or position arrangement of the components. For example, the second damping member 26b comprises a second bracket 261b and a second elastic member 262b. The second bracket 261b is a rigid structure, so that it is not easy to deform under external force. Exemplarily, the second bracket 261b has a plurality of second fixing columns 263b arranged at intervals. Exemplarily, the second elastic member 262b can comprise a plurality of springs. The plurality of springs are correspondingly sleeved on the plurality of second fixing columns 263b.

[0255] It can be understood that the structure of the third damping member 26c is similar or the same as that of the first damping member 26a, and the structure of the fourth damping member 26d is similar or the same as that of the second damping member 26b, and similar contents will not be repeated here.

[0256] Figure 8 is Figure 8 The folding mechanism 100 in a partial structure of an embodiment​Figure 36 .

[0257] As shown in Figure 17 , the first damping member 26a is located at the first fixed frame 21. Exemplarily, the first damping member 26a can be located at the side of the sliding block 212 close to the first protrusion 214a, and at least partially located between the two first guide rail blocks 213a of the first fixed frame 21.

[0258] Exemplarily, the first support 261a of the first damping member 26a is slidingly connected to the first fixed frame 21. Exemplarily, the two first sliding blocks 265a of the first support 261a can be respectively located in the first guide grooves 218a (see Figure 17 ) of the two first guide rail blocks 213a. The first support 261a can slide in the first guide grooves 218a of the two first guide rail blocks 213a.

[0259] Exemplarily, the two first elastic members 262a of the first damping member 26a are respectively sleeved on the two first guide columns 215a (see Figure 36 ) of the first fixed frame 21. The other ends of the first elastic members 262a abut against the first protrusion 214a of the first fixed frame 21. In other embodiments, the other ends of the first elastic members 262a can also be fixed on the first protrusion 214a of the first fixed frame 21 by welding or the like.

[0260] Exemplarily, the first abutting block 264a of the first support 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 exert a damping force on the second connecting end 232 through the first support 261a to limit the first connecting arm 23.

[0261] Exemplarily, the contact position of the first support 261a and the second connecting end 232 of the first connecting arm 23 can be a bevel matching. In this way, the first support 261a can exert a force along the positive direction of the X axis on the first connecting arm 23 under the action of the first elastic member 262a, that is, the first damping member 26a can provide a pre-tightening force to the first connecting arm 23, so as to limit the first connecting arm 23 from rotating relative to the main shaft 1 without external force.

[0262] As shown in Figure 36 , the second damping member 26b is located at the first fixed frame 21. The second damping member 26b can be located at the side of the sliding block 212 close to the second protrusion 214b, and at least partially located between the two second guide rail blocks 213b of the first fixed frame 21. It can be understood that the connection mode of the second damping member 26b and the first fixed frame 21 can refer to the connection mode of the first damping member 26a and the first fixed frame 21. The specific embodiments are not described herein.

[0263] In addition, 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 the side of the first connecting arm 23 away from the first damping member 26a. The second damping member 26b can exert a damping force on the first connecting arm 23, that is, the second damping member 26b can also provide a pre-tightening force to the first connecting arm 23, so as to further limit the first connecting arm 23 from being easily rotated relative to the main shaft 1 under no external force. The cooperation relationship between the second damping member 26b and the first connecting arm 23 can refer to the cooperation relationship between the first damping member 26a and the first connecting arm 23. Details are not described herein again.

[0264] Exemplarily, the first damping member 26a and the second damping member 26b jointly abut against the second connecting end 232 of the first connecting arm 23, so that the first connecting arm 23 and the first fixed frame 21 can maintain a preset relative positional relationship under no large external force, the folding mechanism 100 can stay at a preset angle, and the rotating device can maintain a flat state or a folded state, so as to improve the user experience of the folding mechanism 100 and the electronic device 1000.

[0265] It can be understood that when the folding times or the flattening times of the electronic device 1000 are relatively large, the damping force of the spring of the first damping member 26a and the second damping member 26b decreases, and the abutting limiting capability of the first connecting arm 23 weakens. When the electronic device 1000 is in the flat state, the first fixed frame 21 cannot maintain the preset relative positional relationship under no large external force, and there can be a relatively obvious included angle between the first fixed frame 21 and the second fixed frame 22, which can be 150°, 155° or 160°, etc. In the present application, the first bolt 251, the second bolt 252 and the synchronous gear 253 are further arranged, and when the first bolt 251 and the second bolt 252 are in the locking state, the first connecting arm 23 and the second connecting arm 24 no longer rotate relative to the main shaft 1 under no large external force, and the first fixed frame 21 and the second fixed frame 22 no longer rotate relative to the main shaft 1. At this time, the main shaft 1, the first fixed frame 21 and the second fixed frame 22 can be maintained at a certain angle, for example, 180°. The stability and reliability of the flat state of the folding mechanism 100 are better.

[0266] As Figure 37As shown, the third damping member 26c and the fourth damping member 26d are both located at the second fixed frame 22. The third damping member 26c and the fourth damping member 26d can be located at two sides of the second connecting arm 24. The third damping member 26c and the fourth damping member 26d are both abutted against the fourth connecting end 242 of the second connecting arm 24. The third damping member 26c and the fourth damping member 26d can exert a force along the positive direction of the X axis on the second connecting arm 24, that is, the third damping member 26c and the fourth damping member 26d can provide a pre-tightening force to the second connecting arm 24, so as to further limit the second connecting arm 24 from being easily rotated relative to the main shaft 1 under no external force. It can be understood that the cooperation relationship of the third damping member 26c, the fourth damping member 26d, the second fixed frame 22 and the second connecting arm 24 can refer to the cooperation relationship of the first damping member 26a, the second damping member 26b and the first connecting arm 23. Details are not described herein again.

[0267] It can be understood that when the folding times or the unfolding times of the electronic device 1000 are more, the damping force of the spring of the third damping member 26c and the fourth damping member 26d will decrease, and the abutment limiting capability of the second connecting arm 24 will weaken. When the electronic device 1000 is in the unfolded state, the second fixed frame 22 cannot maintain the preset relative positional relationship under no large external force, and there will be a relatively obvious included angle between the first fixed frame 21 and the second fixed frame 22, which can be 150°, 155° or 160°, etc. In the present application, the first bolt 251, the second bolt 252 and the synchronous gear 253 are further arranged, and when the first bolt 251 and the second bolt 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 under no large external force, and the first fixed frame 21 and the second fixed frame 22 no longer rotate relative to the main shaft 1. At this time, the main shaft 1, the first fixed frame 21 and the second fixed frame 22 can be maintained at a certain angle, for example, 180°. The stability and reliability of the unfolded state of the folding mechanism 100 are better.

[0268] Figure 6 is Figure 38 is an exploded view of the electronic device 1000 from another angle in an embodiment. Figure 37 is Figure 37 is a structural schematic view of the electronic device 1000 in the locked state.

[0269] As Figure 38 and Figure 37As shown, the first fixing frame 21 is fixed on the first housing 300. The second fixing frame 22 is fixed on the second housing 400. Exemplarily, the first housing 300 can be connected with the first housing 300 by screws. The second housing 400 can be connected with the second housing 400 by screws. It can be understood that, in the present embodiment, since the first fixing frame 21 is fixed on the first housing 300 due to the first connecting arm 23 being connected to the first fixing frame 21, the first connecting arm 23 is connected to the first housing 300 through the first fixing frame 21. In other embodiments, the folding mechanism 100 can also not be provided with the first fixing frame 21, at this time, the first connecting arm 23 is directly connected to the first housing 300. Similarly, in other embodiments, the second connecting arm 24 is directly connected to the second housing 400. The specific application is not limited.

[0270] As shown in Figure 38 and Figure 37 When the electronic device 1000 switches from the unfolded state to the folded state, the first housing 300 and the second housing 400 move towards each other, the first housing 300 can drive the first fixing frame 21 to rotate relative to the main shaft 1 through the first connecting arm 23, and the second housing 400 can drive the second fixing frame 22 to rotate relative to the main shaft 1 through the second connecting arm 24. Among them, in the rotation process relative to the main shaft 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 towards the main shaft 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 towards the main shaft 1.

[0271] As shown in Figure 38 and Figure 37 When the electronic device 1000 switches from the folded state to the unfolded state, the first housing 300 and the second housing 400 move away from each other, the first housing 300 can drive the first fixing frame 21 to rotate relative to the main shaft 1 through the first connecting arm 23, and the second housing 400 can drive the second fixing frame 22 to rotate relative to the main shaft 1 through the second connecting arm 24. Among them, in the rotation process relative to the main shaft 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 away from the main shaft 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 away from the main shaft 1.

[0272] Please refer to Figure 36 , and in combination with Figure 37As shown, in one case, the electronic device 1000 includes the first damper 26a, the second damper 26b, the third damper 26c, and the fourth damper 26d. When the number of folding or unfolding of the electronic device 1000 is large, the damping force of the spring of the first damper 26a and the spring of the second damper 26b is reduced, the resistance and limiting ability of the first connecting arm 23 is weakened, the damping force of the spring of the third damper 26c and the spring of the fourth damper 26d is reduced, and the resistance and limiting ability of the second connecting arm 24 is weakened. In addition, after the electronic device 1000 is placed in the folded state for a long time, the rolling force of the flexible screen 200 is large. It can be understood that the rolling force can be the internal stress of the flexible screen 200 to make the flexible screen 200 return to the folded state. In this way, when the electronic device 1000 is in the unfolded state, the flexible screen 200 will overcome the small elastic force of the first damper 26a, the second damper 26b, the third damper 26c, and the fourth damper 26d to bring the first housing 300 and the second housing 400 closer to each other, the first housing 300 can drive the first fixed frame 21 to rotate relative to the main shaft 1 through the first connecting arm 23, and the second housing 400 can drive the second fixed frame 22 to rotate relative to the main shaft 1 through the second connecting arm 24. At this time, when the electronic device 1000 is in the unfolded state, the first housing 300 and the second housing 400 cannot maintain the predetermined relative positional relationship (for example, the first housing 300 and the second housing 400 are maintained at 180°), that is, the electronic device 1000 will appear the unfolded humpback (unfolded uneven) phenomenon. For example, there will be a relatively obvious included angle between the first housing 300 and the second housing 400, which can be 150°, 155°, or 160°, etc. In the embodiment, by arranging the first pin 251, the second pin 252, and the synchronous gear 253 in the main shaft 1, when the electronic device 1000 is in the unfolded state, the first pin 251 can be inserted into the first insertion slot 2311 of the first connecting arm 23, and the second pin 252 can be inserted into the second insertion slot 2411 of the second connecting arm 24. At this time, even if the flexible screen 200 exerts a force on the first housing 300 and the second housing 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 shaft 1, the first fixed frame 21 and the second fixed frame 22 no longer rotate relative to the main shaft 1, and the first housing 300 and the second housing 400 no longer rotate relative to the main shaft 1. At this time, the first housing 300 and the second housing 400 can be maintained in the predetermined relative position (for example, the first housing 300 and the second housing 400 are maintained at 180°). When the electronic device 1000 is in the unfolded state, the electronic device 1000 is more beautiful.

[0273] It can be 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 select whether to insert the first plug 251 into the first slot 2311 when the electronic device 1000 is in the unfolded state. For example, when the folding number or unfolding number of the electronic device 1000 is small, the damping force of the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d is normal, so that the first damping member 26a and the second damping member 26b can normally exert damping force on the first connecting arm 23, and the third damping member 26c and the fourth damping member 26d can normally exert damping force on the second connecting arm 24. At this time, the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d can lock the rotation of the first connecting arm 23 and the second connecting arm 24, and the user can not need to insert the first plug 251 into the first slot 2311 when the electronic device 1000 is in the unfolded state. When the folding number or unfolding number of the electronic device 1000 is large, the damping force of the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d is lost, so that the first damping member 26a and the second damping member 26b cannot exert damping force on the first connecting arm 23, and the third damping member 26c and the fourth damping member 26d cannot exert damping force on the second connecting arm 24. At this time, the first damping member 26a, the second damping member 26b, the third damping member 26c, and the fourth damping member 26d cannot lock the rotation of the first connecting arm 23 and the second connecting arm 24, and the user can insert the first plug 251 into the first slot 2311 when the electronic device 1000 is in the unfolded state.

[0274] Referring to Figure 36 , and in combination with Figure 39 , 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 providing the plug-in assembly 25 in the main shaft 1, on the one hand, a locking mode of the first connecting arm 23 and the second connecting arm 24 can be provided when the electronic device 1000 is in the unfolded state, so that the first housing 300 and the second housing 400 can be kept in a predetermined relative position, and on the other hand, the problem that the first housing 300 and the second housing 400 cannot be kept in a predetermined relative position (for example, the first housing 300 and the second housing 400 are kept in a state of 180°) due to the rolling force of the flexible screen 200, that is, the electronic device 1000 appears to be unfolded and humpbacked, can be solved.

[0275] First, a locking mode of the first connecting arm 23 and the second connecting arm 24 is provided. When the electronic device 1000 is in the unfolded state, the first plug 251 of the plug assembly 25 can be inserted into the first slot 2311 of the first connecting arm 23, and the second plug 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 fixed frame 21 and the second fixed 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 kept in a predetermined relative position (for example, the first shell 300 and the second shell 400 are kept in a state of 180°). At this time, when the electronic device 1000 is in the unfolded state, the electronic device 1000 is more beautiful.

[0276] Second, the problem of the electronic device 1000 appearing to be flat and humpbacked is solved. It can be understood that because the electronic device 1000 is placed in the folded state for a long time, the rolling force of the flexible screen 200 will be large. In this way, when the electronic device 1000 is in the unfolded state, because the flexible screen 200 has a rolling force, the flexible screen 200 will directly drive the first shell 300 and the second shell 400 to move closer to each other, the first shell 300 can drive the first fixed frame 21 to rotate relative to the main shaft 1 through the first connecting arm 23, and the second shell 400 can drive the second fixed frame 22 to rotate relative to the main shaft 1 through the second connecting arm 24. At this time, when the electronic device 1000 is in the unfolded state, the first shell 300 and the second shell 400 cannot be kept in a predetermined relative position (for example, the first shell 300 and the second shell 400 are kept in a state of 180°), that is, the electronic device 1000 will appear to be flat and humpbacked. For example, there will be a relatively obvious included angle between the first shell 300 and the second shell 400, which can be 150°, 155°, or 160°, etc. In the embodiment, when the electronic device 1000 is in the unfolded state, the first plug 251 can be inserted into the first slot 2311 of the first connecting arm 23, and the second plug 252 can be inserted into the second slot 2411 of the second connecting arm 24. At this time, even if the flexible screen 200 exerts a force on 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 shaft 1, the first fixed frame 21 and the second fixed 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 time, the first shell 300 and the second shell 400 can be kept in a predetermined relative position (for example, the first shell 300 and the second shell 400 are kept in a state of 180°). When the electronic device 1000 is in the unfolded state, the electronic device 1000 is more beautiful.

[0277] Figure 6 is Figure 39The electronic device 1000 is shown in a partial structural schematic view from another angle in an embodiment.

[0278] As shown in Figure 36 , the first shielding plate 4a is connected to the folding mechanism 100. Exemplarily, 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 39 ). Exemplarily, a part of the first shielding plate 4a shields the folding mechanism 100 close to one side of the first housing 300. The first shielding plate 4a can be flush with the first housing 300, and the electronic device 1000 has higher aesthetics and integrity.

[0279] As shown in Figure 36 , the second shielding plate 4b is connected to the folding mechanism 100. Exemplarily, 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 39 ). Exemplarily, a part of the second shielding plate 4b shields the folding mechanism 100 close to one side of the second housing 400. The second shielding plate 4b can be flush with the second housing 400, and the electronic device 1000 has higher aesthetics and integrity.

[0280] It can be understood that when the folding mechanism is in the unfolded 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.

[0281] As shown in Figure 26 , the second shielding plate 4b is provided with a second avoiding hole 41b. The second avoiding hole 41b is provided through the second shielding plate 4b.

[0282] Exemplarily, the second avoiding hole 41b is oppositely provided with the first avoiding hole 123 (see ​ ) of the upper cover 12.

[0283] Exemplarily, a part of the pushing part 2513 of the first latch 251 passes through the second avoiding 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. That is, a part of the pushing part 2513 of the first latch 251 extends to the outside of the electronic device 1000. It can be understood that when the user actuates the pushing part 2513 of the first latch 251, the pushing part 2513 partially extending to the outside of the electronic device 1000 is more convenient to operate, and the user can more easily and accurately switch between the unlocked state and the locked state of the electronic device 1000, the applicable population is wider, and the user's experience is better.

[0284] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, and any combination of features in different embodiments is within the protection scope of the present application, that is, the above-described multiple embodiments can also be combined as needed.

[0285] It should be noted that all the above-mentioned drawings are exemplary drawings of the present application, and do not represent the actual size of the product. The size ratio relationship between the components in the drawings is not limited to the actual product of the present application. The above are only part of the embodiments and implementation manners of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A folding mechanism (100) characterized in that, The folding mechanism (100) 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 bolt (251), 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) is connected with the main shaft (1), the second connecting end (232) is connected with the first fixing frame (21), and the first connecting end (231) is 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) is connected with the main shaft (1), and the fourth connecting end (242) is connected with the second fixing frame (22); The first bolt (251) is located on the main shaft (1) and movably connected with the main shaft (1), and is used for being inserted into the first slot (2311) when the folding mechanism (100) is in a flat state.

2. The folding mechanism (100) according to claim 1, characterized in that The third connecting end (241) is provided with a second slot (2411); The folding mechanism (100) comprises a second bolt (252), the second bolt (252) is located on the main shaft (1) and is arranged in a spaced manner with the first bolt (251), the second bolt (252) is movably connected with the main shaft (1), and is used for being inserted into the second slot (2411) when the folding mechanism (100) is in a flat state.

3. The folding mechanism (100) according to claim 2, characterized in that The first bolt (251) has a first engaging part (2514), and the second bolt (252) has a second engaging part (2524); The folding mechanism (100) comprises a synchronous gear (253), the synchronous gear (253) is located on the main shaft (1) and is rotatably connected with the main shaft (1), and the second engaging part (2524) engages the first engaging part (2514) through the synchronous gear (253).

4. The folding mechanism (100) according to claim 3, characterized in that The first bolt (251) has a first limiting part (2515), the second bolt (252) has a second limiting part (2525), a part of the synchronous gear (253) is located between the first limiting part (2515) and the main shaft (1), and a part of the synchronous gear (253) is located between the second limiting part (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 connecting end (231) and the third connecting end (241) are arranged along a first direction, the first bolt (251) and the second bolt (252) are located between the first connecting end (231) and the third connecting end (241), and the first bolt (251) and the second bolt (252) are arranged along a second direction, the first direction is a length extension direction of the main shaft (1), and the second direction intersects with the first direction.

6. The folding mechanism (100) according to claim 3, characterized in that The main shaft (1) comprises a base (11) and an upper cover (12), the upper cover (12) is fixed to the base (11), and a part of the base (11) and a part of the upper cover (12) enclose a containing space (150); The first plug (251), the second plug (252) and the synchronous gear (253) are located in the containing space (150).

7. The folding mechanism (100) according to claim 6, characterized in that The upper cover (12) is provided with a first avoiding hole (123), the first avoiding hole (123) penetrates through the upper cover (12), and the first avoiding hole (123) is communicated with the containing space (150); The first plug (251) has a pushing part (2513), a part of the pushing part (2513) passes through the first avoiding hole (123) from the containing 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), the first shielding plate (4a) is fixedly connected with the second connecting end (232), and the second shielding plate (4b) is fixedly connected with the fourth connecting end (242); When the folding mechanism (100) is in the unfolded 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 avoiding hole (41b), the second avoiding hole (41b) is arranged opposite to the first avoiding hole (123) of the upper cover (12), the pushing part (2513) passes through the second avoiding 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 piece (254), the spring piece (254) comprises a first flat part (2541), a bent part (2542) and a second flat part (2543), the first flat part (2541) and the second flat part (2543) are both fixed to the side of the upper cover (12) facing the containing space (150), and the bent part (2542) protrudes towards the second plug (252); The second plug (252) has a convex part (2523); When the first plug (251) is inserted into the first plug groove (2311), the convex part (2523) of the second plug (252) is located on the side of the bent part (2542) of the spring piece (254) close to the third connecting end (241); When the first plug (251) is separated from the first plug groove (2311), the convex part (2523) of the second plug (252) is located on the side of the bent part (2542) of the spring piece (254) away from the third connecting end (241).

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

11. The folding mechanism (100) according to claim 6, characterized in that The base (11) is provided with a rotating shaft (116), the rotating shaft (116) is located in the containing space (150), the synchronous gear (253) is sleeved on the rotating shaft (116) and is rotationally connected with 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), a bottom wall of the first groove (111a) is an arc surface, a bottom surface of the upper cover (12) comprises a first arc surface (121), and the first groove (111a) and the first arc 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-shaped 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 avoiding groove (113). When the folding mechanism (100) is in a flat state, the first avoiding groove (113) is oppositely arranged with the first insertion groove (2311), and a part of the first bolt (251) can be inserted into the first avoiding groove (113).

14. The folding mechanism (100) according to any one of claims 1 to 4, characterized in that The second connecting end (232) is slidingly connected with the first fixing frame (21). The folding mechanism (100) comprises a first support (261a) and a first elastic member (262a), the first support (261a) is located in the first fixing frame (21) and is slidingly connected with the first fixing frame (21), and the first support (261a) abuts against the second connecting end (232). The first elastic member (262a) is located in the first fixing frame (21), one end of the first elastic member (262a) abuts against the first support (261a), and the other end abuts against the first fixing frame (21), and the first elastic member (262a) is used for exerting a damping force on the second connecting end (232) through the first support (261a).

15. The folding mechanism (100) according to claim 14, characterized in that The first support (261a) comprises a first abutting block (264a) and a plurality of fixing columns (263a), a plurality of first fixing columns (263a) are fixed on one side of the first abutting block (264a) at intervals, 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 correspondingly sleeved on the plurality of first fixing columns (263a).

16. An electronic device (1000), characterized by The folding mechanism (100) comprises a first shell (300), a second shell (400), a flexible screen (200) and the folding mechanism (100) as claimed in any one of claims 1 to 15, the first fixing frame (21) is fixedly connected with the first shell (300), and the second fixing frame (22) is fixedly connected with 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) connected in sequence, the first display area (201) is fixed on the first shell (300), and the third display area (203) is fixed on the second shell (400).

17. An electronic device (1000), characterized by The folding mechanism (100), the first shell (300) and the second shell (400) are included, the folding mechanism (100) is connected with the first shell (300) and the second shell (400), and the folding mechanism (100) is used for relatively unfolding and closing the first shell (300) and the second shell (400). The folding mechanism (100) comprises a main shaft (1), a first connecting arm (23), a second connecting arm (24) and a first bolt (251). The first connecting arm (23) comprises a first connecting end (231) and a second connecting end (232), the first connecting end (231) is connected with the main shaft (1), and the second connecting end (232) is connected with the first shell (300); the second connecting arm (24) comprises a third connecting end (241) and a fourth connecting end (242), the third connecting end (241) is connected with the main shaft (1), and the fourth connecting end (242) is connected with the second shell (400); and the first connecting end (231) is provided with a first slot (2311). The first bolt (251) is located on the main shaft (1) and movably connected with the main shaft (1), and is used for being inserted into the first slot (2311) when the electronic device (1000) is in a flat state.

18. The electronic device (1000) according to claim 17, characterized by The folding mechanism (100) comprises a second bolt (252), and the third connecting end (241) is provided with a second slot (2411). The second bolt (252) is located on the main shaft (1) and is arranged in a spaced manner with the first bolt (251), and is movably connected with the main shaft (1), and is used for being inserted into the second slot (2411) when the electronic device (1000) is in a flat state.

19. The electronic device (1000) according to claim 18, characterized by The first bolt (251) has a first engaging portion (2514), and the second bolt (252) has a second engaging portion (2524). The folding mechanism (100) comprises a synchronous gear (253), the synchronous gear (253) is located on the main shaft (1) and is rotatably connected with the main shaft (1), and the second engaging portion (2524) engages the first engaging portion (2514) through the synchronous gear (253).

20. The electronic device (1000) according to claim 18 or 19, characterized by The first connecting end (231) and the third connecting end (241) are arranged along a first direction, the first bolt (251) and the second bolt (252) are located between the first connecting end (231) and the third connecting end (241), and the first bolt (251) and the second bolt (252) are arranged along a second direction, the first direction is the length extension direction of the main shaft (1), and the second direction intersects the first direction.

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