Folding device and electronic equipment

Abstract

The present application relates to a folding device and an electronic device. The folding device includes: a fixed frame; a rotating frame assembly, the rotating frame assembly includes a first rotating frame and a second rotating frame arranged on both sides of the fixed frame along the width direction of the fixed frame, the first rotating frame and the fixed frame are rotationally connected through a first rotating shaft, and the second rotating frame and the fixed frame are rotationally connected through a second rotating shaft; when the first rotating frame and the second rotating frame rotate toward each other, along the width direction of the fixed frame, the first rotating shaft and the second rotating shaft move in a direction away from the fixed frame. In the process of the folding device switching from the unfolded state to the folded state, along the width direction of the fixed frame, the first rotating frame and the second rotating frame rotate toward each other, and can move in a direction away from the fixed frame driven by the first rotating shaft and the second rotating shaft. Compared with the first rotating shaft and the second rotating shaft not moving, the accommodating space of the folding device when in the folded state can be increased, the squeezing of the folding device on the flexible screen can be reduced, and the reliability of the flexible screen can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a folding device and an electronic equipment. Background Art

[0002] The foldable electronic device includes a housing, a folding assembly and a flexible screen, wherein the housing includes a left housing and a right housing that are separately arranged, the folding assembly is located between the left housing and the right housing, and the flexible screen is installed on the left housing and the right housing. When the left housing and the right housing are folded under the drive of the folding assembly, the flexible screen can be driven to fold, so that the electronic device is in a folded state, in which the volume of the electronic device is small and convenient for storage; when the left housing and the right housing are unfolded under the drive of the folding assembly, the flexible screen is driven to unfold, so that the electronic device is in an unfolded state, in which the display screen of the electronic device is large, which can improve the user experience.

[0003] At present, during the folding process of existing foldable electronic devices, the flexible screen may be pulled or squeezed at the folding position of the folding component, resulting in reduced reliability and service life of the flexible screen. Summary of the invention

[0004] The present application provides a folding device and an electronic device, which, when in a folded state, can reduce the risk of the flexible screen being pulled or squeezed during the unfolding and folding process, thereby improving the safety and reliability of the flexible screen.

[0005] The first aspect of the present application provides a folding device, which includes: a fixed frame; a rotating frame assembly, the rotating frame assembly including a first rotating frame and a second rotating frame arranged on both sides of the fixed frame along the width direction of the fixed frame; the first rotating frame and the fixed frame are rotatably connected via a first rotating shaft, and the first rotating shaft can move relative to the fixed frame along the width direction of the fixed frame; the second rotating frame and the fixed frame are rotatably connected via a second rotating shaft, and the second rotating shaft can move relative to the fixed frame along the width direction of the fixed frame; when the first rotating frame and the second rotating frame rotate towards each other, the first rotating shaft and the second rotating shaft move in a direction away from the fixed frame along the width direction of the fixed frame.

[0006] Specifically, when the folding device switches from the unfolded state to the folded state, the first rotating frame and the second rotating frame can rotate towards each other along the width direction of the fixed frame, and can also move in the direction away from the fixed frame driven by the first rotating shaft and the second rotating shaft. Compared with the first rotating shaft and the second rotating shaft not moving, the accommodating space of the folding device when it is in the folded state can be increased.

[0007] In a possible design, the folding device further includes: a swing arm assembly, including a first swing arm and a second swing arm located on both sides of the fixed frame in the width direction; the rotating frame assembly is rotatably connected to the fixed frame through the swing arm assembly, one end of the first swing arm is slidably connected to the first rotating frame and can rotate relatively, and the other end is rotatably connected to the fixed frame through the first rotating shaft; one end of the second swing arm is slidably connected to the second rotating frame and can rotate relatively, and the other end is rotatably connected to the fixed frame through the second rotating shaft;

[0008] The transmission assembly comprises a transmission group and a pushing group; the transmission group comprises a first transmission link and a second transmission link located on both sides of the width direction of the fixed frame; the first transmission link is slidably connected to the first rotating frame and is rotatably connected to the fixed frame, and the second transmission link is slidably connected to the second rotating frame and is rotatably connected to the fixed frame; the pushing group comprises a first pushing member and a second pushing member, the first pushing member is rotatably connected to the second swing arm through the second rotating shaft, and the first pushing member is also rotatably connected to the first transmission link, the second pushing member is rotatably connected to the first swing arm through the first rotating shaft, and the second pushing member is also rotatably connected to the second transmission link;

[0009] Among them, the axis around which the first transmission link rotates relative to the fixed frame and the axis around which the first transmission link rotates relative to the first pushing member are different axes, and the axis around which the second transmission link rotates relative to the fixed frame and the axis around which the second transmission link rotates relative to the second pushing member are different axes; the first transmission link is used to transmit the movement of the first rotating frame to drive the first pushing member to push the second rotating shaft to move in a direction away from the fixed frame, and the second transmission link is used to transmit the movement of the second rotating frame to drive the second pushing member to push the first rotating shaft to move in a direction away from the fixed frame.

[0010] In this solution, the two ends of the first swing arm are respectively connected to the first rotating frame and the second pushing member, and the two ends of the second swing arm are respectively connected to the second rotating frame and the first pushing member. Therefore, the first rotating frame and the second rotating frame are connected through the first transmission link, the first pushing member and the second swing arm, and are also connected through the second transmission link, the second pushing member and the first swing arm. At this time, the first transmission link, the first pushing member, the second swing arm, and the second transmission link, the second pushing member, and the first swing arm are used to realize the linkage between the first rotating frame and the second rotating frame. The first transmission link is used to transmit the movement of the first rotating frame, and the second transmission link is used to transmit the movement of the second rotating frame, so that when the first rotating frame and the second rotating frame rotate toward each other, the first rotating frame drives the first pushing member through the first transmission link to push the second rotating shaft to move in the direction away from the fixed frame, and the second rotating frame drives the second pushing member through the second transmission link to push the first rotating shaft to move in the direction away from the fixed frame, so as to increase the accommodation space when the folding device is in the folded state. At the same time, when the first swing arm is rotatably connected to the first rotating frame, the risk of the first swing arm and the first rotating frame getting stuck during folding or unfolding of the folding device can be reduced; when the second swing arm and the second rotating frame are rotatably connected to the second rotating frame, the risk of the second swing arm and the second rotating frame getting stuck during folding or unfolding of the folding device can be reduced.

[0011] In a possible design, the transmission assembly also includes a limit group, which includes a first limit member and a second limit member; one end of the first limit member is rotatably connected to the fixed frame, and the other end is rotatably connected to the first swing arm and the second pushing member through the first rotating shaft; one end of the second limit member is rotatably connected to the fixed frame, and the other end is rotatably connected to the second swing arm and the first pushing member through the second rotating shaft; the first limit member is used to limit the first pushing member to move along a first preset trajectory, and the second limit member is used to limit the second pushing member to move along a second preset trajectory.

[0012] In this solution, the first rocker, the first pusher, the second limiter and the fixed frame of the first transmission link form a first double rocker mechanism, and the second rocker, the second pusher, the first limiter and the fixed frame of the second transmission link form a second double rocker mechanism. At this time, when the folding device realizes the transmission between the first rotating frame and the second rotating frame through the above-mentioned first double rocker mechanism and the second double rocker mechanism, since the various moving components of the double rocker mechanism move in the same plane, the complexity of the folding device can be reduced, the movement of the various components of the folding device can be simplified, and the stability and reliability of the movement of the first rotating frame and the second rotating frame can be improved. And when the transmission assembly of the folding device is realized by the double rocker mechanism, the above-mentioned first rotating shaft and the second rotating shaft can be connected to the connecting rod of the double rocker mechanism. When the connecting rod moves in a plane, it drives the first rotating shaft and the second rotating shaft to move in a plane, and then drives the first rotating shaft and the second rotating shaft to move relative to the fixed frame (frame) along the width direction of the fixed frame.

[0013] In a possible design, the first preset trajectory and the second preset trajectory are both along the width direction of the fixed frame. In this solution, in the first double rocker mechanism, when the lengths of the first rocker and the second limiter are the same, it means that the lengths of the two connecting rods of the first double rocker mechanism are the same. At this time, the movement of the connecting rod (first pusher) of the first double rocker mechanism is a translation along the width direction of the fixed frame, that is, the first preset trajectory is a straight line extending along the width direction of the fixed frame; similarly, in the second double rocker mechanism, when the lengths of the second rocker and the first limiter are the same, it means that the lengths of the two connecting rods of the second double rocker mechanism are the same. At this time, the movement of the connecting rod (second pusher) of the second double rocker mechanism is a translation along the width direction of the fixed frame, that is, the second preset trajectory is a straight line extending along the width direction of the fixed frame. When the movement trajectories of the first pusher and the second pusher are both straight lines along the width direction, the movement stability of the two can be further improved, thereby improving the stability of the movement of the first rotating shaft and the second rotating shaft along the width direction of the fixed frame.

[0014] In a possible design, both the first preset trajectory and the second preset trajectory are inclined along the width direction of the fixing frame toward the thickness direction of the fixing frame; and the inclination directions of the first preset trajectory and the second preset trajectory are opposite, and the first pusher is inclined along the thickness direction of the fixing frame during the movement along the width direction of the fixing frame; and the second pusher is inclined along the thickness direction of the fixing frame during the movement along the second preset trajectory. In this solution, when the lengths of the first rocker arm and the second limiter are different, the first pusher is inclined along the thickness direction of the fixing frame while moving along the width direction of the fixing frame, and when the lengths of the second rocker arm and the first limiter are different, the second pusher is inclined along the thickness direction of the fixing frame while moving along the width direction of the fixing frame. At this time, the requirements for the lengths of the first rocker arm and the second limiter, and the second rocker arm and the first limiter are reduced, thereby reducing the difficulty of processing. At the same time, when the first pushing member and the second pushing member move along the width direction of the fixing frame and tilt along the thickness direction of the fixing frame at the same time, it can also prevent the first pushing member and the first transmission connecting rod and the second swing arm connected thereto from getting stuck, and can also prevent the second pushing member and the second transmission connecting rod and the first rocking arm connected thereto from getting stuck.

[0015] In a possible design, the first pusher is slidably connected to the fixing frame, and the second pusher is slidably connected to the fixing frame. In this solution, the first pusher can slide relative to the fixing frame along the width direction of the fixing frame to push the second rotating shaft to move along the width direction of the fixing frame, and at the same time, the second pusher can slide relative to the fixing frame along the width direction of the fixing frame to push the first rotating shaft to move along the width direction of the fixing frame.

[0016] In a possible design, the transmission assembly also includes a limit group, which includes a first limit member and a second limit member; the first limit member and the second limit member are both slidably connected to the fixed frame; the first limit member can slide relative to the fixed frame along the width direction of the fixed frame, the first limit member and the second push member are rotatably connected via the first rotating shaft, and the second push member can move relative to the first limit member along the thickness direction of the fixed frame, and the first limit member is also rotatably connected to the first swing arm; the second limit member can slide relative to the fixed frame along the width direction of the fixed frame, the second limit member and the first push member are rotatably connected via the second rotating shaft, and the first push member can move relative to the second limit member along the thickness direction of the fixed frame, and the second limit member is also rotatably connected to the second swing arm; the first limit member is used to limit the first push member to move along a third preset trajectory, and the second limit member is used to limit the second push member to move along a fourth preset trajectory.

[0017] In the present scheme, the first crank, the first pushing member, the second limiting member and the fixed frame of the first transmission connecting rod form a first crank slider mechanism, and the second crank, the second pushing member, the first limiting member and the fixed frame of the second transmission connecting rod form a second crank slider mechanism. At this time, when the folding device realizes the transmission between the first rotating frame and the second rotating frame through the above-mentioned first crank slider mechanism and the second crank slider mechanism, since the various moving components of the crank slider mechanism all move in the same plane, the complexity of the folding device can be reduced, the movement of the various components of the folding device can be simplified, and the stability and reliability of the movement of the first rotating frame and the second rotating frame can be improved. Moreover, in the first crank slider mechanism, the movement of the first pusher can be a curved motion within the plane where the first crank slider mechanism is located, that is, the first pusher can move relative to the fixed frame along the width direction of the fixed frame, and can also move along the thickness direction of the fixed frame, thereby driving the second rotating shaft to move along the width direction of the fixed frame. In the second crank slider mechanism, the movement of the second pusher can be a curved motion within the plane where the second crank slider mechanism is located, that is, the second pusher can move relative to the fixed frame along the width direction of the fixed frame, and can also move along the thickness direction of the fixed frame, thereby driving the first rotating shaft to move along the width direction of the fixed frame.

[0018] In a possible design, the second limiting member is provided with a first mounting groove, and the first limiting member is provided with a second mounting groove, and both the first mounting groove and the second mounting groove are recessed along the thickness direction of the fixing frame; the first pushing member is movably connected to the first mounting groove, and the second pushing member is movably connected to the second mounting groove.

[0019] In the present solution, in order to realize the curvilinear motion of the first pusher, the second limiting member is provided with a first mounting groove, and the first pusher is movably mounted in the first mounting groove, so that the first pusher can move relative to the second limiting member along the width direction and thickness direction of the fixed frame (curvilinear motion). Similarly, in order to realize the curvilinear motion of the second pusher, the first limiting member is provided with a second mounting groove, and the second pusher is movably mounted in the second mounting groove, so that the second pusher can move relative to the first limiting member along the width direction and thickness direction of the fixed frame (curvilinear motion). At the same time, the first mounting groove and the second mounting groove are both recessed along the thickness direction of the fixed frame, which can reduce the thickness of the first pusher when installed in the first mounting groove and the thickness of the second pusher when installed in the second mounting groove, thereby reducing the size of the folding device along the thickness direction of the fixed frame, which is conducive to miniaturization and thinness of the folding device and the electronic device.

[0020] In a possible design, the side wall of the fixed frame relative to the first limiting member and the second limiting member is provided with a slide groove extending along the width direction of the fixed frame, and the first limiting member and the second limiting member are respectively slidably connected with the corresponding slide groove. In this solution, the first limiting member and the slide groove that cooperate with each other can realize the sliding of the first limiting member along the width direction of the fixed frame, thereby limiting the movement trajectory of the first pusher and preventing the movement of the first pusher from deviating. Similarly, the second limiting member and the slide groove that cooperate with each other can realize the sliding of the second limiting member along the width direction of the fixed frame, thereby limiting the movement trajectory of the second pusher and preventing the movement of the second pusher from deviating. In a possible design, the first rotating shaft is provided on the first pushing member, the first swing arm is rotatably connected with the first rotating shaft, the second rotating shaft is provided on the second pushing member, and the second swing arm is rotatably connected with the second rotating shaft; the fixed frame is provided with a plurality of slide grooves extending along the width direction of the fixed frame, the first rotating shaft is slidably connected with the corresponding slide groove, and the second rotating shaft is slidably connected with the corresponding slide groove. In this solution, the first rotating shaft and the sliding groove cooperate with each other to enable the second rotating shaft to slide along the width direction of the fixed frame, and can limit the movement trajectory of the first pushing member to prevent the movement of the first pushing member from deviating. Similarly, the second rotating shaft, the sliding groove and the first rotating shaft slide along the width direction of the fixed frame, and can limit the movement trajectory of the second pushing member to prevent the movement of the second pushing member from deviating.

[0021] In a possible design, the slide groove is inclined along the thickness direction of the fixed frame or is an arc-shaped structure, that is, the height of the slide groove is different along the thickness direction of the fixed frame to realize the movement of the first pusher and the second pusher along the width direction and the thickness direction of the fixed frame, that is, the first pusher and the second pusher can move along the width direction of the fixed frame while being inclined along the thickness direction of the fixed frame, which can prevent the first pusher and the first transmission connecting rod and the second swing arm connected thereto from getting stuck, and can prevent the second pusher and the second transmission connecting rod and the first swing arm connected thereto from getting stuck.

[0022] In a possible design, the folding device further includes a support plate assembly, and the support plate assembly includes a first support plate and a second support plate arranged on both sides of the fixed frame along the width direction of the fixed frame; the first support plate is rotatably connected to the first rotating frame, and the first support plate is slidably connected to the first transmission link and can rotate relatively; the second support plate is rotatably connected to the second rotating frame; and the second support plate is slidably connected to the second transmission link and can rotate relatively. In this solution, when the first rotating frame and the first support plate rotate relatively, and the second rotating frame and the second support plate rotate relatively, the first support plate and the first rotating frame can be prevented from getting stuck, and the second support plate and the second rotating frame can be prevented from getting stuck during the folding or unfolding process of the folding device, so that the folding device can work normally.

[0023] In a possible design, during the process of the first rotating frame and the second rotating frame rotating toward each other, the first transmission link drives the end of the first support plate close to the fixed frame to move in a direction away from the fixed frame, and the second transmission link drives the end of the second support plate close to the fixed frame to move in a direction away from the fixed frame, so that when the first rotating frame and the second rotating frame rotate toward each other to the first position, the first support plate, the fixed frame and the second support plate form a receiving space. Wherein, along the width direction of the fixed frame, the first support plate has a second end close to the fixed frame, and the second support plate has a fourth end close to the fixed frame; during the process of the first rotating frame and the second rotating frame rotating toward each other, the first transmission link drives the second end to move in a direction away from the fixed frame, and the second transmission link drives the second end to move in a direction away from the fixed frame.

[0024] In this solution, since the first rotating frame is connected to the first support plate, and the second rotating frame is connected to the second support plate, the first supporting plate can be driven to move and rotate during the rotation and movement of the first rotating frame, and the second supporting plate can be driven to move and rotate during the rotation and movement of the second rotating frame, and when the first rotating frame and the second rotating frame rotate toward each other, the second end of the first supporting plate and the fourth end of the second supporting plate can be driven to move away from each other, so that the folding device switches from the unfolded state to the folded state. At the same time, when the folding device is in the folded state, the first supporting plate, the second supporting plate, the first transmission connecting rod, the second transmission connecting rod and the fixed frame enclose a storage space, and the storage space is used to accommodate the folding components of the flexible screen. When the first rotating frame drives the first support plate to rotate and move in a direction away from the fixed frame, and the second rotating frame drives the second support plate to rotate and move in a direction away from the fixed frame, compared with the first rotating frame only driving the first support plate to rotate and the second rotating frame only driving the second support plate to rotate, when the folding device is in a folded state, the distance between the first support plate and the fixed frame, and between the second support plate and the fixed frame is larger, thereby increasing the second length L2 of the contour of the accommodating space of the folding device, thereby reducing the squeezing and pulling of the folding part by the folding device during the folding process, improving the reliability and structural strength of the flexible screen, and reducing the requirements for the performance of the flexible screen material, thereby reducing the cost. At the same time, the accommodating space has enough space, thereby preventing the folded part of the flexible screen from arching in the accommodating space, and improving the flatness of the flexible screen when it is in a folded state.

[0025] In a possible design, the first transmission link includes a first arc segment, which is rotatably connected to the fixed frame, and the second transmission link includes a second arc segment, which is rotatably connected to the fixed frame; when the first rotating frame and the second rotating frame rotate toward each other to a first position, the first support plate, the first arc segment, the fixed frame, the second arc segment and the second support plate form an accommodating space.

[0026] In this solution, when the folding device is in a folded state, the first support plate, the second support plate, the first arc segment of the first transmission link, the second arc segment of the second transmission link and the fixed frame enclose the above-mentioned accommodation space. The accommodation space includes a third arc segment, a third straight segment and a fourth straight segment, and the third arc segment is located between the third straight segment and the fourth straight segment. Among them, the first arc segment of the first transmission link and the second arc segment of the second transmission link enclose the third arc segment of the accommodation space, the first straight segment of the first support plate forms the third straight segment of the accommodation space, and the second straight segment of the second support plate forms the fourth straight segment of the accommodation space. The third arc segment is used to accommodate the fifth part of the folding part. At this time, compared with the first support plate and the second support plate of the flat plate structure in the accommodation space, the first arc segment and the second arc segment can reduce the extrusion of the folding part, thereby reducing the extrusion of the folding device (the first transmission link and the second transmission link) on the flexible screen during the folding process, and further improving the reliability and structural strength of the flexible screen.

[0027] In a possible design, the first support plate and the first transmission connecting rod are provided with a first track and a first slider that are slidably matched, and the second support plate and the second transmission connecting rod are provided with a second track and a second slider that are slidably matched; during the process of the first rotating frame and the second rotating frame rotating toward each other, the first slider slides from the end of the first track away from the fixed frame to the end of the first track close to the fixed frame, and the second slider slides from the end of the second track away from the fixed frame to the end of the second track close to the fixed frame. Wherein, the first track has a fifth end and a sixth end that are relatively arranged, and the second track has a seventh end and an eighth end that are relatively arranged, and the sixth end and the eighth end are close to the fixed frame; during the process of the first rotating frame and the second rotating frame rotating toward each other, the first slider can slide from the fifth end to the sixth end, and the second slider can slide from the seventh end to the eighth end; during the process of the first rotating frame and the second rotating frame rotating away from each other, the first slider can slide from the sixth end to the fifth end, and the second slider can slide from the eighth end to the seventh end.

[0028] In this solution, since the first support plate is slidably connected to the first transmission link, and the second support plate is slidably connected to the second transmission link, during the rotation of the first support plate and the second support plate driven by the first rotating frame and the second rotating frame, the first support plate can slide and rotate relative to the first transmission link, and the sliding track of the first support plate is the first track, and the second support plate can slide and rotate relative to the second transmission link, and the sliding track of the second support plate is the second track. Therefore, the first track is used to guide the relative sliding between the first support plate and the first transmission link, and the second track is used to guide the relative sliding between the second support plate and the second transmission link.

[0029] In one possible design, the first track is tilted or has an arc-shaped structure, and the second track is tilted or has an arc-shaped structure. In this case, the first track allows the first support plate to slide relative to the first transmission link and rotate relative to it to prevent the two from getting stuck, and the second track allows the second support plate to slide relative to the second transmission link and rotate relative to it to prevent the two from getting stuck.

[0030] In a possible design, the folding device further includes a first damping assembly connected to the fixed frame, the first damping assembly and the transmission assembly are arranged along the length direction of the fixed frame; the first damping assembly includes a first rotating arm, a second rotating arm, at least two mutually meshing first gears, a first elastic member and a cam arranged between the first elastic member and the first gear, the cam having a first concave-convex surface; along the width direction of the fixed frame, one end of the first rotating arm is slidably connected to the first rotating frame and can rotate relatively, and the other end is provided with a first tooth portion; one end of the second rotating arm is slidably connected to the second rotating frame and can rotate relatively, and the other end is provided with a second tooth portion, the first tooth portion and the second tooth portion are both meshed with the first gear, and along the length direction of the fixed frame, the first gear is provided with a second concave-convex surface on a side opposite to the first concave-convex surface; the cam and the first gear are arranged along the length direction of the fixed frame, and the two ends of the first elastic member are elastically abutted against the fixed frame and the cam respectively; during the rotation of the first rotating arm and the second rotating arm, the first tooth portion and the second tooth portion can rotate relative to the cam so that the first concave-convex surface can mesh with the second concave-convex surface.

[0031] In the scheme, when the folding device is in the unfolded state, the first damping component can provide a first damping force, and the first damping force can act on the first rotating frame and the second rotating frame, thereby providing resistance to the first rotating frame and the second rotating frame rotating toward each other, so that the folding device can be maintained in the unfolded state, and when the folding device needs to switch from the unfolded state to the folded state, the user needs to apply a driving force that can overcome the first damping force to the first rotating frame and the second rotating frame, so that the first rotating frame and the second rotating frame can overcome the first damping force, so that the folding device is switched to the folded state. When the folding device is in the folded state, the first damping component can provide a second damping force, and the second damping force can act on the first rotating frame and the second rotating frame, thereby providing resistance to the first rotating frame and the second rotating frame rotating away from each other, so that the folding device can be maintained in the folded state, and when the folding device needs to switch from the folded state to the unfolded state, the user needs to apply a driving force that can overcome the second damping force to the first rotating frame and the second rotating frame, so that the first rotating frame and the second rotating frame can overcome the second damping force, so that the folding device is switched to the unfolded state. At the same time, during the folding or unfolding process of the folding device, the first damping component can also provide a third damping force, thereby providing torque for the electronic device during the unfolding and folding process, thereby improving the user experience during the unfolding and folding process.

[0032] In a possible design, the first damping assembly also includes a mounting member, the mounting member has an installation space, the cam and the first elastic member are located in the mounting space; the first gear is connected to a pin shaft extending along the length direction of the fixing frame, the cam and the first elastic member are sleeved on the pin shaft, and the two ends of the first elastic member are elastically abutted against the mounting member and the cam respectively; the mounting member is provided with a rotating hole, the pin shaft can pass through the rotating hole and extend out of the mounting member, the first damping assembly also includes a clamping member, the part of the pin shaft extending out of the mounting member is provided with a clamping groove, and the clamping member is clamped with the clamping groove.

[0033] In this solution, the mounting member has an installation space, which is used to install the first elastic member and the cam. At the same time, the setting of the clamping member can also clamp the first elastic member and the cam of the first damping assembly through the clamping member, thereby preventing the first elastic member and the cam from falling out.

[0034] In a possible design, the folding device also includes a second damping assembly and a third damping assembly, the first transmission link has a first mounting cavity, the second damping assembly is mounted in the first mounting cavity, the second transmission link has a second mounting cavity, and the third damping assembly is mounted in the second mounting cavity; the second damping assembly includes a first moving part and a second elastic part, along the length direction of the fixed frame, the second elastic part is connected to the first moving part, and the first moving part is elastically supported to the first rotating frame through the second elastic part, the second elastic part can be deformed along the length direction of the fixed frame, and the first moving part is connected to the first transmission link through a first roller; the third damping assembly includes a second moving part and a third elastic part, along the length direction of the fixed frame, the third elastic part is connected to the second moving part, and the second moving part is elastically supported to the second rotating frame through the third elastic part, the third elastic part can be deformed along the length direction of the fixed frame, and the second moving part is connected to the second transmission link through a second roller.

[0035] In this solution, when the folding device is in the unfolded state, the second damping component can provide a fourth damping force acting on the first rotating frame, thereby providing resistance to the rotation of the first rotating frame, and the third damping component can provide a fifth damping force acting on the second rotating frame, thereby providing resistance to the rotation of the second rotating frame, so that the first rotating frame and the second rotating frame can be maintained in the second position, that is, the folding device can be maintained in the unfolded state. And when the folding device needs to switch from the unfolded state to the folded state, the user needs to apply a driving force that can overcome the fourth damping force to the first rotating frame, and apply a driving force that can overcome the fifth damping force to the second rotating frame, so that the first rotating frame and the second rotating frame can rotate towards each other, thereby switching the folding device from the unfolded state to the folded state.

[0036] When the folding device is in the folded state, the second damping member group can provide the sixth damping force to the first rotating frame, thereby providing resistance to the rotation of the first rotating frame, and the third damping assembly can provide the seventh damping force to the second rotating frame, thereby providing resistance to the rotation of the second rotating frame, so that the first rotating frame and the second rotating frame can be maintained in the first position, that is, the folding device can be maintained in the folded state. And when the folding device needs to switch from the folded state to the unfolded state, the user needs to apply a driving force that can overcome the sixth damping force to the first rotating frame, and apply a driving force that can overcome the seventh damping force to the second rotating frame, so that the first rotating frame and the second rotating frame can rotate in opposite directions, so that the folding device switches from the folded state to the unfolded state. At the same time, during the folding or unfolding process of the folding device, the second damping assembly can apply the eighth damping force to the first rotating frame, and the third damping assembly can apply the ninth damping force to the second rotating frame, so as to provide torque for the electronic device during the unfolding and folding process, and improve the user experience during the folding and unfolding process.

[0037] In a possible design, the first rotating frame includes a first recessed portion and a second recessed portion spaced apart along the width direction of the fixed frame, and the second rotating frame includes a third recessed portion and a fourth recessed portion spaced apart along the width direction of the fixed frame; during the rotation of the first rotating frame, the first moving member can move along the wall surface between the first recessed portion and the second recessed portion, and the first moving member can cooperate with the first recessed portion or the second recessed portion; during the rotation of the second rotating frame, the second moving member can move along the wall surface between the third recessed portion and the fourth recessed portion, and the second moving member can cooperate with the third recessed portion or the fourth recessed portion. In this solution, when the first moving member cooperates with the first recessed portion or the second recessed portion, the first rotating frame can be limited to the above-mentioned first position or the second position, and the stability and reliability of the first rotating frame in this position can be improved. Similarly, when the second moving member cooperates with the third recessed portion or the fourth recessed portion, the second rotating frame can be limited to the above-mentioned first position or the second position, and the stability and reliability of the second rotating frame in this position can be improved.

[0038] In a possible design, the distance between the first recessed portion and the fixing frame is smaller than the distance between the second recessed portion and the fixing frame, and the distance between the third recessed portion and the fixing frame is smaller than the distance between the fourth recessed portion and the fixing frame.

[0039] In this solution, when the folding device is in the unfolded state, that is, when the first rotating frame and the second rotating frame are in the second position, the first moving member of the second damping assembly cooperates with the first recessed portion, and the second moving member of the third damping assembly cooperates with the third recessed portion. When the folding device is in the folded state, that is, when the first rotating frame and the second rotating frame are in the first position, the first movement of the second damping assembly cooperates with the second recessed portion, and the second moving member of the third damping assembly cooperates with the fourth recessed portion. And when the distance between the first recessed portion and the fixed frame is smaller than the distance between the second recessed portion and the fixed frame, and the distance between the third recessed portion and the fixed frame is smaller than the distance between the fourth recessed portion and the fixed frame, during the process of the first rotating frame and the second rotating frame rotating toward each other, the first transmission link can move relative to the first rotating frame, and the second transmission link can move relative to the second rotating frame in a direction away from the fixed frame, so as to prevent the first transmission link and the first rotating frame from getting stuck, and prevent the second transmission link and the second rotating frame from getting stuck.

[0040] In a possible design, the first moving member can slide along the wall surface between the first recessed portion and the second recessed portion, and the second moving member can slide along the wall surface between the third recessed portion and the fourth recessed portion. In this solution, during the relative movement between the first rotating frame and the first transmission connecting rod, the first moving member slides along the first rotating frame, and during the relative movement between the second rotating frame and the second transmission connecting rod, the second moving member slides along the second rotating frame.

[0041] In a possible design, the first moving member can roll along the wall surface between the first recessed portion and the second recessed portion, and the second moving member can roll along the wall surface between the third recessed portion and the fourth recessed portion. In this solution, during the relative movement between the first rotating frame and the first transmission connecting rod, the first moving member rolls along the first rotating frame, and during the relative movement between the second rotating frame and the second transmission connecting rod, the second moving member rolls along the second rotating frame, thereby reducing the wear between the first moving member and the first rotating frame, and between the second moving member and the second rotating frame.

[0042] In a possible design, the first mounting cavity is provided with a first through hole, the first roller can rotate in the first through hole, and the first roller can move in the first through hole along the length direction of the fixed frame; the second mounting cavity is provided with a second through hole, the second roller can rotate in the second through hole, and the second roller can move in the second through hole along the length direction of the fixed frame.

[0043] In the present solution, the first transmission connecting rod is provided with a first through hole, and the dimension of the first through hole along the length direction of the fixed frame is larger than the dimension of the first through hole along the width direction of the fixed frame, that is, the first through hole is an elongated hole, the first roller of the first moving member can rotate in the first through hole, and the first roller can also move along the length direction of the fixed frame, which can realize the movement of the two first moving members along the length direction of the fixed frame to change the deformation amount of the second elastic member, thereby realizing the movement of the first moving member relative to the first rotating frame. Similarly, the second transmission connecting rod is provided with a second through hole, and the dimension of the second through hole along the length direction of the fixed frame is larger than the dimension of the second through hole along the width direction of the fixed frame, that is, the second through hole is an elongated hole, the second roller of the second moving member can rotate in the second through hole, and the second roller can also move along the length direction of the fixed frame, thereby realizing the movement of the two second moving members along the length direction of the fixed frame to change the deformation amount of the third elastic member, thereby realizing the movement of the second moving member relative to the second rotating frame.

[0044] In a possible design, the transmission assembly also includes a synchronous gear set, which includes a second gear, a third gear, a fourth gear and a fifth gear arranged along the width direction of the fixed frame, the fourth gear is meshed with the second gear, the fifth gear is meshed with the third gear, and the fourth gear is meshed with the fifth gear; the second gear is connected to the first transmission connecting rod, and the third gear is connected to the second transmission connecting rod.

[0045] In this solution, the second gear and the first transmission link rotate around the same rotation axis, and the third gear and the second transmission link rotate around the same rotation axis, thereby realizing the synchronous rotation of the second gear and the first transmission link, and the third gear and the second transmission link, and the first transmission link is connected to the first rotating frame, and the second transmission link is connected to the second rotating frame, thereby realizing the synchronous rotation of the first rotating frame and the second rotating frame. At the same time, by adding a fourth gear and a fifth gear that mesh with the second gear and the third gear in the synchronous gear set, the diameter of the second gear and the third gear can be reduced while the second gear and the third gear are meshed, thereby reducing the space occupied by the synchronous gear set along the width direction and the thickness direction of the fixed frame, which is conducive to realizing the miniaturization and lightness of the folding device.

[0046] The second aspect of the present application provides an electronic device, which includes: a first shell, a second shell, a flexible screen and the folding device described in the first aspect above; the first shell and the second shell are located on both sides of the folding device, the first shell is fixedly connected to the first rotating frame located on the same side, and the second shell is fixedly connected to the second rotating frame located on the same side; the flexible screen covers the first shell, the second shell and the folding device, and is fixedly connected to the first shell and the second shell.

[0047] In this solution, driven by the folding device, the electronic device can be in an unfolded state or a folded state, and when the folding device switches from the unfolded state to the folded state, since the first rotating frame and the second rotating frame connected to the first shell and the second shell can rotate toward each other and move in a direction away from the fixed frame, the accommodation space of the folding device in the folded state can be increased, and the compression of the folding device on the flexible screen when the electronic device is in the folded state can be reduced, thereby improving the reliability of the flexible screen. At the same time, when the accommodation space has enough space, it can also prevent the flexible screen from arching in the accommodation space, and improve the flatness of the flexible screen in the folded state.

[0048] In a possible design, when the folding device includes a support plate assembly, the flexible screen is also fixedly connected to at least a portion of the support plate assembly.

[0049] In a possible design, the flexible screen includes a third area, a fourth area and a fifth area, and the fifth area is located between the third area and the fourth area; the support plate assembly includes a first support plate and a second support plate arranged along the width direction of the fixed frame, and there is no fixed connection between the third area and the first support plate, there is no fixed connection between the fourth area and the second support plate, and there is no fixed connection between the fifth area and the folding device. In this solution, when the electronic device is in a folded state, the third area, the fourth area and the fifth area form a water drop-shaped structure after folding, that is, the folded part is in the shape of a water drop, and the fifth area is in the shape of a semicircle after folding, and because there is no fixed connection between the third area, the fourth area and the fifth area of ​​the flexible screen and the folding device, it is possible to prevent the folding device from stretching the flexible screen during folding or unfolding, thereby improving the reliability of the flexible screen.

[0050] In a possible design, the flexible screen includes a third area, a fourth area and a fifth area, and the fifth area is located between the third area and the fourth area; the support plate assembly includes a first support plate and a second support plate arranged along the width direction of the fixing frame, the third area is fixedly connected to the first support plate, the fourth area is fixedly connected to the second support plate, and the fifth area is not fixedly connected to the supporting device. In this solution, when the electronic device is in a folded state, the fifth area 25 is surrounded by a semicircular arc, and when the third area is fixedly connected to the first support plate and the fourth area is fixedly connected to the second support plate, when the electronic device is folded or unfolded, the third area can move with the first support plate and the fourth area can move with the second support plate, that is, the third area has no relative movement with the first support plate, thereby improving the flatness of the folded part of the flexible screen during the unfolding and folding process and reducing the risk of failure of the flexible screen.

[0051] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of unfolding and folding a part of a flexible screen in a specific embodiment in the prior art;

[0053] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application in an unfolded state;

[0054] Figure 3 for Figure 2 Exploded diagram of

[0055] Figure 4 for Figure 2 The structural diagram without the flexible screen;

[0056] Figure 5 A schematic diagram of the structure of an electronic device in a folded state provided by an embodiment of the present application;

[0057] Figure 6 for Figure 5 A cross-sectional view of

[0058] Figure 7 for Figure 6 A partial enlarged view of part I;

[0059] Figure 8 for Figure 4 A cross-sectional view of

[0060] Fig. 9 for Figure 8 A partial enlarged view of part II;

[0061] Fig.10 for Fig. 9 Schematic diagram of the shape of the accommodating space;

[0062] Fig.11 for Figure 3 A schematic diagram of the structure of the folding device in the first specific embodiment, wherein the folding device is in an unfolded state;

[0063] Fig.12 for Fig.11 Exploded diagram of

[0064] Fig.13 for Fig.11 A schematic diagram of the cooperation of the rotating frame assembly, the fixed frame and the transmission assembly in the first specific embodiment;

[0065] Fig.14 for Fig.13 Partial exploded view;

[0066] Fig.15 for Fig.14 A schematic diagram of the structure of the rotating frame assembly and the transmission assembly in the first specific embodiment;

[0067] Fig.16 for Fig.15 A schematic diagram of the matching structure of the first rotating frame and the first transmission connecting rod in the first specific embodiment;

[0068] Fig.17 for Fig.15 A schematic diagram of the matching structure of the second rotating frame and the second transmission connecting rod in the first specific embodiment;

[0069] Fig.18 for Figure 3 A schematic structural diagram of the folding device in a second specific embodiment, wherein the folding device is in an unfolded state;

[0070] Fig.19 for Fig.18 Exploded diagram of

[0071] Fig. 20 for Fig.19 A schematic diagram of the matching structure of the rotating frame assembly, the transmission assembly and the fixed frame in the second specific embodiment;

[0072] Fig.21 for Fig. 20 Exploded diagram of

[0073] Fig. 22 for Fig.19 A schematic diagram of the matching structure of the rotating frame assembly, the transmission assembly, the fixed frame and the first damping assembly in the third specific embodiment;

[0074] Fig.23 for Fig. 22 Exploded diagram of

[0075] Fig.24 for Figure 2 sectional view of

[0076] Fig.25 for Fig.24 A partial enlarged view of part III;

[0077] Fig.26 for Fig.18 A cross-sectional view of the folding device at the synchronous gear set after removing the support plate assembly;

[0078] Fig. 27 for Fig.11 A partial enlarged view of part IV;

[0079] Fig.28 for Fig.12A partial enlarged view of the middle V part;

[0080] Fig.29 for Fig.11 A partial enlarged view of part VI;

[0081] Fig.30 for Fig.18 A cross-sectional view of the folding device in FIG.

[0082] Fig.31 for Fig.18 A side view of the folding device in a folded state;

[0083] Fig.32 for Fig.23 A schematic structural diagram of a first damping component in a specific embodiment;

[0084] Fig.33 for Fig.32 Exploded diagram of

[0085] Fig.34 for Fig.18 A cross-sectional view at the first damping component;

[0086] Fig.35 for Fig.33 A partial enlarged view of part VII;

[0087] Fig.36 for Fig.23 A perspective view of a first rotating frame and a second damping assembly in a specific embodiment;

[0088] Fig.37 for Fig.36 A schematic diagram of the structure of the second damping component;

[0089] Fig.38 for Fig.36 A top view of the first rotating frame;

[0090] Fig.39 for Fig.23 A schematic structural diagram of the first transmission connecting rod;

[0091] Fig.40 for Fig.13 A partial enlarged view of part VIII.

[0092] Reference numerals:

[0093] 1′-flexible screen;

[0094] 1-folding device, 11-rotating frame assembly, 111-first rotating frame, 111a-first recessed portion, 111b-second recessed portion, 111c-third protruding portion; 112-second rotating frame, 112a-third recessed portion, 112b-fourth recessed portion, 112c-fourth protruding portion; 113-third track, 114-third rotating frame, 114a-first sliding space, 115-fourth rotating frame, 115a-second sliding space;

[0095] 12-swing arm assembly, 121-first swing arm, 121a-ninth rotating shaft, 122-second swing arm, 122a-tenth rotating shaft;

[0096] 13-pushing group, 131-first pushing member, 132-second pushing member, 133-first limiting member, 133a-first protruding portion, 134-second limiting member, 134a-second protruding portion;

[0097] 14-transmission group, 141-first transmission connecting rod, 141a-first rocker, 141b-first mounting cavity, 141c-first through hole, 141d-first slider, 141e-first crank, 141f-first arc segment, 141g-first straight segment, 142-second transmission connecting rod, 142a-second rocker, 142b-second mounting cavity, 142c-second through hole, 142d-second slider, 142e-second crank, 142f-second arc segment, 142g-second straight segment, 143-third slider;

[0098] 151 - first rotating shaft, 152 - second rotating shaft, 153 - third rotating shaft, 154 - fourth rotating shaft, 155 - fifth rotating shaft, 156 - sixth rotating shaft, 157 - eighth rotating shaft, 158 - eleventh rotating shaft, 159 - twelfth rotating shaft;

[0099] 16-synchronous gear set, 161-second gear, 162-third gear, 163-fourth gear, 164-fifth gear;

[0100] 17-support plate assembly, 171-first support plate, 1711-first body portion, 1712-first extension portion, 1713-first track, 1713a-fifth end, 1713b-sixth end, 1714-first end, 1715-first arc-shaped groove, 1716-second end, 172-second support plate, 1721-second body portion, 1722-second extension portion, 1723-second track, 1723b-eighth end; 1724-third end, 1726-fourth end, 173-third support plate, 174-accommodation space, 174a-third arc segment, 174b-third straight segment, 174c-fourth straight segment;

[0101] 18-fixed frame, 181-rotating shaft cover, 181a-accommodating chamber, 182-fixed block, 182a-slideway;

[0102] 191-first damping assembly, 1911-cam, 1911a-first concave-convex surface, 1912-first elastic member, 1913-first gear, 1913a-second concave-convex surface, 1914-first rotating arm, 1914a-first tooth portion, 1914b-thirteenth rotating shaft, 1915-second rotating arm, 1915a-second tooth portion, 1915b-fourteenth rotating shaft, 1916-installation member, 1916a-installation space, 1916b-pressing plate, 1917-clamping member, 1918-pin shaft, 1918a-clamping slot;

[0103] 192-second damping assembly, 1921-first moving member, 1921a-first roller, 1922-second elastic member;

[0104] 193-third damping assembly;

[0105] 2-flexible screen, 21-first area, 22-second area, 23-third area, 24-fourth area, 25-fifth area, 26-folding part;

[0106] 31 - first shell, 311 - first groove, 32 - second shell, 321 - second groove.

[0107] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0108] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0109] Figure 1 The figure shows a partial structure of a flexible screen 1' in the prior art, which is the part where the flexible screen 1' cooperates with the folding assembly. When the foldable electronic device is in the unfolded state, the outer length of the flexible screen 1' is L1, and the inner length is L2. At this time, L1 = L2, that is, in the unfolded state, the length of each part of the flexible screen 1' is the same, and the flexible screen 1' is not stretched or compressed; when the flexible screen 1' is driven by the folding assembly, the ... Figure 1As shown by the arrow, after folding, the length L2 of the inner side of the flexible screen 1′ becomes L4, and the length L1 of the outer side becomes L3, L4<L2, and L3>L1, that is, during the folding process, the inner side of the flexible screen 1′ is compressed and the outer side is stretched, and the length of the middle layer of the flexible screen 1′ along the thickness direction changes during the folding process, resulting in the risk of damage to the flexible screen 1′ due to multiple stretching and compression when folded multiple times.

[0110] In order to solve this technical problem, an embodiment of the present application provides an electronic device. An embodiment of the present application provides a Figure 2 The electronic device shown includes any device with a foldable screen function, such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a laptop computer, a car computer, a foldable display device, a foldable display screen, a wearable device, etc. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned electronic device. For the convenience of explanation, the following description is made by taking the electronic device as an example. The electronic device of the present application is introduced with a specific embodiment.

[0111] like Figure 2 and Figure 3As shown, the electronic device includes a folding device 1, a screen, a first shell 31 and a second shell 32, wherein the screen may be a flexible screen 2, and the flexible screen 2 is used to display images, videos, etc. The specific type of the flexible screen 2 of the present application is not limited. For example, the flexible screen 2 may be an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen. As a self-luminous display screen, the AMOLED display screen does not require a backlight module (BLM). Therefore, when the substrate substrate in the AMOLED display screen is made of a flexible resin material, such as polyethyleneterephthalate (PET), the AMOLED display screen can have a bendable property. Exemplarily, the flexible screen 2 can also be an organic light-emitting diode (OLED) display, a mini organic light-emitting diode (Mini organic light-emitting diode) display, a micro organic light-emitting diode (Micro organic light-emitting diode) display, a quantum dot light emitting diode (Quantum dot light emitting diodes, QLED) display, etc.

[0112] like Figure 3 and Figure 4 As shown, the first shell 31 and the second shell 32 are spaced apart, and the first shell 31 and the second shell 32 can also be the middle frame structure of the electronic device, and the first shell 31 and the second shell 32 are used to install the battery, circuit board, camera, earphone, receiver, button, battery and other components of the electronic device, and the first shell 31 and the second shell 32 are also used to carry the flexible screen 2, that is, the flexible screen 2 is fixedly connected (for example, glued) to the first shell 31 and the second shell 32, so that the flexible screen 2 is kept as flat as possible during use, and the non-display surface of the flexible screen 2 is protected. The folding device 1 is located between the first shell 31 and the second shell 32, and is connected to the first shell 31 and the second shell 32. Specifically, as shown Figure 3 As shown, the first shell 31 is provided with a first groove 311, and the second shell 32 is provided with a second groove 321. A part of the folding device 1 is installed in the first groove 311, and the other part is installed in the second groove 321. In some possible embodiments, the folding device 1 can be connected to the first groove 311 and the second groove 321 by means of screws or the like.

[0113] During the use of the electronic device, the folding device 1 at least includes Figure 4 The expanded state shown and Figure 5 In the folded state shown in the figure, in the unfolded state, the first shell 31 and the second shell 32 are roughly located in the same plane, so that the flexible screen 2 is roughly flat. At this time, the flexible screen 2 is exposed, and the user can operate the flexible screen 2, and the flexible screen 2 can display information such as images or videos to achieve a large-screen display and improve the user's viewing experience. When the folding device 1 is in the unfolded state, the first shell 31 and the second shell 32 can rotate in the direction indicated by the arrow in the figure, thereby driving the folding device 1 to fold along the center line O. During the folding process, the ends of the first shell 31 and the second shell 32 away from the folding device 1 approach each other, so that the electronic device is in a state of being unfolded. Figure 5 The folded state shown in the figure, and the electronic device in this embodiment is a flexible screen folding structure. In this folded state, the flexible screen 2 is located in the space enclosed by the folded first shell 31 and the second shell 32. At this time, the flexible screen 2 is not exposed, and the user cannot operate the flexible screen 2, and the electronic device is easy to store and carry. When the folding device 1 is in the folded state, the first shell 31 and the second shell 32 can rotate (the rotation direction is the same as the rotation direction of the first shell 31 and the second shell 32). Figure 4 The folding device 1 is unfolded along the center line O, so that the electronic device is in the opposite direction of the arrow shown in FIG. Figure 4 Therefore, in the present application, the folding device 1 is used to realize the folding and unfolding of the electronic device.

[0114] Those skilled in the art will appreciate that the structures illustrated in the embodiments of the present application do not constitute specific limitations on the electronic device. In other possible implementations of the present application, the electronic device may include more components than shown in the figure, or combine certain components, or separate certain components, or arrange the components differently.

[0115] like Figure 6 and Figure 7 As shown, the folding device 1 forms a accommodating space 174 after being folded. The folding part 26 of the flexible screen 2 is accommodated in the accommodating space 174, and the remaining part is accommodated in the first shell 31 and the second shell 32. In order to improve the service life and reliability of the flexible screen 2, it is necessary to reduce or eliminate the pulling and squeezing of the folding component 26 during the unfolding and folding process, that is, it is necessary to ensure that the folding component 26 is not pulled by external force during the unfolding process and is not squeezed by external force during the folding process.

[0116] Specifically, Fig. 9 As shown, when the folding device 1 is in the unfolded state, along the width direction Y of the fixing frame 18, the portion where the folding device 1 cooperates with the folding portion 26 of the flexible screen 2 has a first length L1. Fig.10As shown, when the folding device 1 is in the folded state, the folding device 1 forms a receiving space 174 for receiving the folded portion 26 of the flexible screen 2, and the contour length (circumference) of the receiving space 174 is a second length L2, as shown in FIG. Fig. 9 As shown, the first length L1 and the second length L2 satisfy L1<L2. Fig. 9 The expanded state shown switches to Fig.10 During the folding state shown, the contour length of the part of the folding device 1 that cooperates with the folding part 26 increases, so that the folding device 1 can provide sufficient space to accommodate the folding part 26 of the flexible screen 2 in the folded state, reduce the pulling and squeezing of the folding part 26 during the folding process of the folding device 1, and reduce the risk of functional failure of the flexible screen 2.

[0117] In the present application, the folding device 1 is used to ensure that the folding component 26 is not squeezed or stretched by external forces during the folding process. Fig.11 and Fig.12 As shown, the folding device 1 includes a fixing frame 18, and the fixing frame 18 is relative to the first shell 31 and the second shell 32 of the electronic device (please refer to the attached Figure 3 ) is fixed, and during the folding and unfolding process of the folding device 1, the center line O can be the center line of the fixing frame 18, and the extension direction of the center line O is defined as the length direction X of the fixing frame 18. In the electronic device in the unfolded state (please refer to the attached Figure 3 ), the arrangement direction of the first shell 31 and the second shell 32 is defined as the width direction Y of the fixing frame 18, and the direction perpendicular to the length direction X and the width direction Y of the above-mentioned fixing frame 18 is defined as the height direction Z of the fixing frame 18.

[0118] At the same time, if Fig.12 As shown, the folding device 1 also includes a rotating frame assembly 11, such as Figures 13-15 As shown, the rotating frame assembly 11 includes a first rotating frame 111 and a second rotating frame 112 arranged on both sides of the fixed frame 18 along the width direction Y of the fixed frame 18, as shown in FIG. Fig.15 As shown, the first rotating frame 111 is rotatably connected to the fixed frame 18 via a first rotating shaft 151, and the second rotating frame 112 is rotatably connected to the fixed frame 18 via a second rotating shaft 152. The first rotating frame 111 can rotate relative to the fixed frame 18 around the first rotating shaft 151, and the second rotating frame 112 can rotate relative to the fixed frame 18 around the second rotating shaft 152. Fig.15 The position indicated by the reference numeral 151 indicates the position of the axis of the first rotating shaft 151 , and the position indicated by the reference numeral 152 indicates the position of the axis of the second rotating shaft 152 .

[0119] In this embodiment, when the first rotating frame 111 and the second rotating frame 112 are both rotatably connected to the fixed frame 18, the first rotating frame 111 and the second rotating frame 112 can rotate towards each other or rotate away from each other. Figure 4 The expanded state shown switches to Figure 5 In the folded state shown in FIG. 1 , the first rotating frame 111 and the second rotating frame 112 rotate in opposite directions. Figure 5 The folded state shown switches to Figure 4 Shown in expanded state.

[0120] Specifically, Fig.15 As shown, during the folding process of the folding device 1, that is, when the first rotating frame 111 and the second rotating frame 112 rotate toward each other, the first rotating shaft 151 and the second rotating shaft 152 move in a direction away from the fixed frame 18 along the width direction Y of the fixed frame 18. Therefore, during the process of switching from the unfolded state to the folded state, the folding device 1 can move in a direction away from the fixed frame 18 driven by the first rotating shaft 151 and the second rotating shaft 152 while the first rotating frame 111 and the second rotating frame 112 rotate toward each other. Compared with the first rotating shaft 151 and the second rotating shaft 152 not moving, the accommodating space 174 of the folding device 1 in the folded state can be increased, that is, it can help to achieve L1 < L2, reduce the extrusion and stretching of the folding part 26 by the folding device 1 during the folding process, improve the reliability and structural strength of the flexible screen 2, and reduce the requirements on the performance of the material of the flexible screen 2, thereby reducing the cost.

[0121] Specifically, in order to realize the movement of the first rotating shaft 151 and the second rotating shaft 152 away from the fixed frame 18 along the width direction Y of the fixed frame 18 during the process of the first rotating frame 111 and the second rotating frame 112 rotating toward each other, the folding device 1 can also include a transmission assembly and a swing arm assembly, which are used to transmit the movement of the first rotating frame 111 and the second rotating frame 112, realize the linkage of the first rotating frame 111 and the second rotating frame 112, and realize the movement of the first rotating shaft 151 and the second rotating shaft 152 along the width direction Y.

[0122] The specific structure of the transmission assembly and the swing arm assembly is introduced in detail below.

[0123] like Fig.12 , Fig.13 , Fig.14 , Fig.21 and Fig.23As shown, the swing arm assembly 12 includes a first swing arm 121 and a second swing arm 122 located on both sides of the fixed frame 18 along the width direction Y. One end of the first swing arm 121 is slidably connected to the first rotating frame 111 and can rotate relatively, and the other end is rotatably connected to the fixed frame 18 through a first rotating shaft 151. One end of the second swing arm 122 is slidably connected to the second rotating frame 112 and can rotate relatively, and the other end is rotatably connected to the fixed frame 18 through a second rotating shaft 151. Fig.21 and Fig.23 As shown, the first swing arm 121 is rotationally connected to the first rotating frame 111 via a ninth rotating shaft 121a, and the second swing arm 122 is rotationally connected to the second rotating frame 112 via a tenth rotating shaft 122a, wherein the ninth rotating shaft 121a is a cylindrical protrusion arranged on the first swing arm 121, and the tenth rotating shaft 122a is a cylindrical protrusion arranged on the second swing arm 122.

[0124] The transmission assembly includes a transmission group 14 and a driving group 13. Figures 13-15 As shown in , 20 to 23, the transmission group 14 includes a first transmission link 141 and a second transmission link 142 located on both sides of the width direction Y of the fixed frame 18, wherein the first transmission link 141 is slidably connected to the first rotating frame 111 and is rotatably connected to the fixed frame 18, and the second transmission link 142 is slidably connected to the second rotating frame 112 and is rotatably connected to the fixed frame 18, as shown in Fig.15 , Fig.16 , Fig.21 and Fig.23 As shown, the first transmission connecting rod 141 is rotatably connected to the fixing frame 18 via a third rotating shaft 153, as shown in FIG. 15, Fig.17 , Fig.21 and Fig.23 As shown, the second transmission connecting rod 142 is rotatably connected to the fixing frame 18 via a fourth rotating shaft 154. Fig.15 , Fig.16 , Fig.21 and Fig.23 The reference numeral 153 indicates the position of the axis of the third rotating shaft 153 after the first transmission connecting rod 141 is rotatably connected to the fixing frame 18. Fig.15 , Fig.17 , Fig.21 The reference numeral 154 shown in FIG. 23 indicates the position of the axis of the fourth rotating shaft 154 after the second transmission link 142 is rotationally connected to the fixing frame 18 .

[0125] like Figures 13-15As shown in , 20 to 23, the push group 13 includes a first push member 131 and a second push member 132. The first push member 131 is rotatably connected to the second swing arm 122 via the second rotating shaft 152, and the first push member 131 is also rotatably connected to the first transmission link 141. The second push member 132 is rotatably connected to the first swing arm 121 via the first rotating shaft 151, and the second push member 132 is also rotatably connected to the second transmission link 142. Among them, the first push member 131 is rotatably connected to the first transmission link 141 via the fifth rotating shaft 155, and the second push member 132 is rotatably connected to the second transmission link 142 via the sixth rotating shaft 156. Fig.15 , Fig.16 , Fig.21 and Fig.23 The reference numeral 155 is the position where the axis of the fifth rotating shaft 155 is located after the first pushing member 131 is connected to the first transmission connecting rod 141. Fig.15 , Fig.17 , Fig.21 and Fig.23 The reference numeral 156 is the position of the axis of the sixth rotating shaft 156 after the second pusher 132 is connected to the second transmission connecting rod 142. The third rotating shaft 153 and the fifth rotating shaft 155 are different axes, and the fourth rotating shaft 154 and the sixth rotating shaft 156 are different axes.

[0126] In this embodiment, the first transmission link 141 is used to transmit the movement of the first rotating frame 111, and the second transmission link 142 is used to transmit the movement of the second rotating frame 112, so that when the first rotating frame 111 and the second rotating frame 112 rotate toward each other, the first rotating frame 111 drives the first pushing member 131 through the first transmission link 141 to push the second rotating shaft 152 to move in a direction away from the fixed frame 18, and the second rotating frame 112 drives the second pushing member 132 through the second transmission link 142 to push the first rotating shaft 151 to move in a direction away from the fixed frame 18, so as to increase the accommodating space 174 when the folding device 1 is in a folded state. At the same time, in the folding device 1, the two ends of the first swing arm 121 are respectively connected to the first rotating frame 111 and the second pushing member 132, and the two ends of the second swing arm 122 are respectively connected to the second rotating frame 112 and the first pushing member 131. Therefore, the first rotating frame 111 and the second rotating frame 112 are connected through the first transmission link 141, the first pushing member 131 and the second swing arm 122, and are also connected through the second transmission link 142, the second pushing member 132 and the first swing arm 121. At this time, the first transmission link 141, the first pushing member 131, the second swing arm 122 and the second transmission link 142, the second pushing member 132, and the first swing arm 121 are used to realize the linkage of the first rotating frame 111 and the second rotating frame 112.

[0127] In the embodiment of the present application, the transmission component can be specifically Fig.15 , Fig.21 and Fig.23 The embodiment shown is implemented, and the specific structures of the transmission assembly in three embodiments are introduced below.

[0128] Furthermore, in order to improve the stability of the movement of each component of the transmission assembly, the transmission assembly also includes a limit group. Figures 13 to 17 The figure shows an implementation of a position limiting group, which includes a first position limiting member 133 and a second position limiting member 134. One end of the first position limiting member 133 is rotatably connected to the fixing frame 18, and the other end is rotatably connected to the first swing arm 121 and the second pusher 132 via a first rotating shaft 151; one end of the second position limiting member 134 is rotatably connected to the fixing frame 18, and the other end is rotatably connected to the second swing arm 122 and the first pusher 131 via a second rotating shaft 152. Fig.25 As shown, the second stopper 134 is rotatably connected to the fixing frame 18 via the eighth rotating shaft 157. Correspondingly, the first stopper 133 is rotatably connected to the fixing frame 18 via the seventh rotating shaft (not shown in the figure). The first stopper 133 is used to limit the first pusher 131 to move along the first preset track, and the second stopper 134 is used to limit the second pusher 132 to move along the second preset track. At the same time, the movement directions of the first pusher 131 and the second pusher 132 are opposite. Fig.16 As shown, in the first transmission link 141, the portion located between the third rotating shaft 153 and the fifth rotating shaft 155 is the first rocker 141a, and the first rocker 141a is a part of the first transmission link 141, that is, the first rocker 141a is fixedly connected or integrally formed with other portions of the first transmission link 141; similarly, Fig.17 As shown, in the second transmission link 142, the portion located between the fourth rotating shaft 154 and the sixth rotating shaft 156 is the second rocker arm 142a, and the second rocker arm 142a is a part of the second transmission link 142, that is, the second rocker arm 142a is fixedly connected with other parts of the second transmission link 142 or is integrally formed.

[0129] In the present application embodiment, Fig.15As shown, the first rocker 141a of the first transmission link 141, the first pusher 131, the second limiter 134 and the fixed frame 18 form a planar four-bar mechanism, and the second rocker 142a, the second pusher 132, the first limiter 133 and the fixed frame 18 form a planar four-bar mechanism. The planar four-bar mechanism is a mechanism including four rigid moving components, and each moving component moves in the same plane. Specifically, the planar four-bar mechanism includes a frame, a connecting rod and a connecting rod, wherein the frame is in a fixed state, the moving component directly connected to the frame is the connecting rod, and the component not connected to the frame is the connecting rod. The planar four-bar mechanism can be specifically implemented by a double rocker mechanism and a crank slider mechanism, wherein the two connecting rods of the double rocker mechanism are both rockers, and the connecting rod performs a planar motion in the plane where the planar four-bar is located.

[0130] Specifically, when the planar four-bar mechanism is implemented by a double rocker mechanism, the fixed frame 18 is the frame of the planar four-bar mechanism. Since the first rocker 141a and the second limiter 134 are both rotatably connected to the fixed frame 18, the first rocker 141a and the second limiter 134 are connecting rods of the planar four-bar mechanism, and the first rocker 141a and the second limiter 134 swing within a certain angle range. Therefore, the two are rockers, and the first pushing member 131 is not directly connected to the fixed frame 18. The first pushing member 131 is the connecting rod of the planar four-bar mechanism. Therefore, the first rocker 141a, the first pushing member 131, the second limiter 134 and the fixed frame 18 form a first double rocker mechanism. Similarly, the second rocker arm 142a, the second pushing member 132, the first limiting member 133 and the fixed frame 18 form a planar four-bar mechanism, and the fixed frame 18 is the frame of the planar four-bar mechanism. Since the second rocker arm 142a and the first limiting member 133 are both rotatably connected to the fixed frame 18, the second rocker arm 142a and the first limiting member 133 are connecting rods of the planar four-bar mechanism, and the second rocker arm 142a and the first limiting member 133 can swing within a certain angle range. Therefore, the two are rockers, the second pushing member 132 is not directly connected to the fixed frame 18, and the second pushing member 132 is a connecting rod of the planar four-bar mechanism. The second rocker arm 142a, the second pushing member 132, the first limiting member 133 and the fixed frame 18 form a second double rocker mechanism.

[0131] Therefore, when the transmission assembly of the folding device 1 for transmitting the movement of the first rotating frame 111 and the second rotating frame 112 is realized by the above-mentioned double rocker mechanism, since the various moving components of the double rocker mechanism move in the same plane, the complexity of the folding device 1 can be reduced, the movement of the various components of the folding device 1 can be simplified, and the stability and reliability of the movement of the first rotating frame 111 and the second rotating frame 112 can be improved. And when the transmission assembly of the folding device 1 is realized by the double rocker mechanism, the above-mentioned first rotating shaft 151 and the second rotating shaft 152 can be connected to the connecting rod of the double rocker mechanism. When the connecting rod moves in a plane, it drives the first rotating shaft 151 and the second rotating shaft 152 to move in a plane, and then drives the first rotating shaft 151 and the second rotating shaft 152 to move relative to the fixed frame 18 (frame) along the width direction Y of the fixed frame 18.

[0132] In the above-mentioned first double rocker mechanism, the first pushing member 131 is connected to the first rocker 141a and the second limiting member 134 at both ends along the width direction Y of the fixing frame 18, respectively, and the first rocker 141a and the second limiting member 134 are arranged along the width direction Y of the fixing frame 18, so that the first pushing member 131 moves in a plane driven by the first rocker 141a and the second limiting member 134, and the movement of the first pushing member 131 at least includes a partial movement along the width direction Y of the fixing frame 18, thereby realizing the movement of the second rotating shaft 152 connected to the first pushing member 131 along the width direction Y of the fixing frame 18. In this embodiment, the first preset trajectory of the first pushing member 131 can be a curved motion or a linear motion within the plane where the first double rocker mechanism is located, and the first preset trajectory has a sub-trajectory along the thickness direction Y of the fixed frame 18, and also has a sub-trajectory along the thickness direction Z of the fixed frame 18, that is, the first pushing member 131 can move relative to the fixed frame 18 along the width direction Y of the fixed frame 18, and can also move along the thickness direction Z of the fixed frame 18.

[0133] Similarly, in the above-mentioned second double rocker mechanism, the second pushing member 132 is respectively connected to the second rocker 142a and the first limiting member 133 at both ends along the width direction Y of the fixing frame 18, and the second rocker 142a and the first limiting member 133 are arranged along the width direction Y of the fixing frame 18, so that the second pushing member 132 moves in a plane driven by the second rocker 142a and the first limiting member 133, and the movement of the second pushing member 132 at least includes a sub-movement along the width direction Y of the fixing frame 18, thereby realizing the movement of the first rotating shaft 151 connected to the second pushing member 132 along the width direction Y of the fixing frame 18. In this embodiment, the second preset trajectory of the second push member 132 can be a curved motion or a linear motion within the plane where the second double rocker mechanism is located, and the second preset trajectory has a sub-trajectory along the thickness direction Y of the fixed frame 18, and also has a sub-trajectory along the thickness direction Z of the fixed frame 18, that is, the second push member 132 can move relative to the fixed frame 18 along the width direction Y of the fixed frame 18, and can also move along the thickness direction Z of the fixed frame 18.

[0134] Therefore, in the first double rocker mechanism, the first preset trajectory of the first pusher 131 is related to the size relationship between the first rocker 141a and the second stopper 134, and the second preset trajectory of the second pusher 132 is related to the size relationship between the second rocker 142a and the first stopper 133. The first preset trajectory and the second preset trajectory are described in detail below.

[0135] In the first embodiment, in the first double rocker mechanism, when the length of the first rocker 141a and the second limit member 134 are the same, it means that the lengths of the two connecting rods of the first double rocker mechanism are the same. At this time, the movement of the connecting rod (first push member 131) of the first double rocker mechanism is a translation along the width direction Y of the fixed frame 18, that is, the first preset trajectory is a straight line extending along the width direction Y of the fixed frame 18; similarly, in the second double rocker mechanism, when the length of the second rocker 142a and the first limit member 133 are the same, it means that the lengths of the two connecting rods of the second double rocker mechanism are the same. At this time, the movement of the connecting rod (second push member 132) of the second double rocker mechanism is a translation along the width direction Y of the fixed frame 18, that is, the second preset trajectory is a straight line extending along the width direction Y of the fixed frame 18.

[0136] In another specific embodiment, in the above-mentioned first double rocker mechanism, the lengths of the first rocker 141a and the second limit member 134 are different, indicating that the lengths of the two connecting rods of the first double rocker mechanism are different. At this time, the connecting rod (first push member 131) of the first double rocker mechanism moves along the width direction Y of the fixed frame 18 while also tilting along the thickness direction Z of the fixed frame 18, that is, the first preset trajectory of the first push member 131 is a linear motion or a curved motion in the plane where the width direction Y and the thickness direction Z of the fixed frame 18 are located (that is, the first preset trajectory has a sub-trajectory along the width direction Y of the fixed frame 18 and a sub-trajectory along the thickness direction Z of the fixed frame 18). Similarly, in the above-mentioned second double rocker mechanism, the lengths of the second rocker 142a and the first limit member 133 are different, indicating that the lengths of the two connecting rods of the second double rocker are different. At this time, the connecting rod (second push member 132) of the second double rocker mechanism moves along the width direction Y of the fixed frame 18 while also tilting along the thickness direction Z of the fixed frame 18, that is, the second preset trajectory of the second push member 132 is a linear motion or a curved motion in the plane where the width direction Y and the thickness direction Z of the fixed frame 18 are located (that is, the second preset trajectory has a sub-trajectory along the width direction Y of the fixed frame 18 and a sub-trajectory along the thickness direction Z of the fixed frame 18).

[0137] Specifically, in the first double rocker mechanism, the lengths of the first rocker 141a and the second stopper 134 are different, and specifically, the length of the first rocker 141a is greater than the length of the second stopper 134, or the length of the first rocker 141a is less than the length of the second stopper 134. In this case, the requirements for the lengths of the first rocker 134a and the second stopper 134 are reduced, thereby reducing the difficulty of processing. At the same time, when the first pusher 131 and the second pusher 132 move along the width direction Y of the fixing frame 18 and tilt along the thickness direction Z of the fixing frame 18, the first pusher 131 and the first transmission link 141 and the second swing arm 122 connected thereto can be prevented from being stuck, and the second pusher 132 and the second transmission link 142 connected thereto and the first rocker 121 can be prevented from being stuck.

[0138] Specifically, in the first double rocker mechanism, when the first pushing member 131 moves along the first preset trajectory, one end thereof along the width direction Y of the fixed frame 18 moves upward, and the other end thereof moves downward, that is, one end of the first pushing member 131 connected to the first rocker 141a and one end of the first pushing member 131 connected to the second limiting member 134, one end moves upward, and the other end moves downward; similarly, in the second double rocker mechanism, when the second pushing member 132 moves along the second preset trajectory, one end thereof along the width direction Y of the fixed frame 18 moves upward, and the other end moves downward, that is, one end of the second pushing member 132 connected to the second rocker 142a and one end of the second pushing member 132 connected to the first limiting member 133, one end moves upward, and the other end moves downward.

[0139] Therefore, in this embodiment, the folding device 1 can limit the first pushing member 131 to move along the first preset trajectory and the second pushing member 132 to move along the second preset trajectory by setting the above-mentioned first double rocker mechanism and the second double rocker mechanism, thereby realizing the movement of the first rotating shaft 151 and the second rotating shaft 152 along the width direction Y of the fixed frame 18.

[0140] like Figure 20-21 Another implementation of the position limiting group is shown, which can realize the sliding of the first pusher 131 and the second pusher 132 relative to the fixed frame 18. Specifically, the first pusher 131 can slide relative to the fixed frame 18 along the width direction Y of the fixed frame 18, thereby driving the second rotating shaft 152 connected to the first pusher 131 to move along the width direction Y of the fixed frame 18; the second pusher 132 can slide relative to the fixed frame 18 along the width direction Y of the fixed frame 18, thereby driving the first rotating shaft 151 connected to the second pusher 132 to move along the width direction Y of the fixed frame 18. The specific structure of the position limiting group in this embodiment is described in detail below.

[0141] In a specific embodiment, Fig. 20 and Fig.21 As shown, the first stopper 133 of the stopper group is slidably connected to the fixing frame 18, and the first stopper 133 can slide relative to the fixing frame 18 along the width direction Y of the fixing frame 18. The first stopper 133 is rotatably connected to the second pusher 131 through the first rotating shaft 151, and the first stopper 133 is also rotatably connected to the first swing arm 121. Fig.21As shown, the first stopper 133 is rotatably connected to the first swing arm 121 via the first rotation shaft 151. Meanwhile, the second stopper 134 of the stopper group is slidably connected to the fixing frame 18, and the second stopper 134 can slide relative to the fixing frame 18 along the width direction Y of the fixing frame 18, the second stopper 134 is rotatably connected to the first pusher 131 via the second rotation shaft 152, and the second stopper 134 is rotatably connected to the second swing arm 122 via the second rotation shaft 152.

[0142] In this embodiment, the first limiter 133 is used to limit the first pusher 131 to move along the third preset track, and the second limiter 134 is used to limit the second pusher 132 to move along the fourth preset track. The first pusher 131 and the second pusher 132 move in opposite directions.

[0143] Among them, Fig.21 As shown, in the first transmission connecting rod 141, the portion located between the third rotating shaft 153 and the fifth rotating shaft 155 is the first crank 141e, and the first crank 141e is a part of the first transmission connecting rod 141, that is, the first crank 141e is fixedly connected or integrally formed with other parts of the first transmission connecting rod 141; similarly, Fig.21 As shown, in the second transmission connecting rod 142, the part located between the fourth rotating shaft 154 and the sixth rotating shaft 156 is the second crank 142e, and the second crank 142e is a part of the second transmission connecting rod 142, that is, the second crank 142e is fixedly connected with other parts of the second transmission connecting rod 142 or is integrally formed.

[0144] like Fig.21 In the illustrated embodiment, the first crank 141e of the first transmission connecting rod 141, the first pusher 131, the second stopper 134 and the fixing frame 18 form a planar four-bar mechanism, and the second crank 142e of the second transmission connecting rod 142, the second pusher 132, the first stopper 133 and the fixing frame 18 form a planar four-bar mechanism. The planar four-bar mechanism can also be implemented by a crank slider mechanism. The specific implementation method of the crank slider mechanism is described in detail below.

[0145] In this embodiment, Fig.21As shown, among the first crank 141e, the first pushing member 131, the second limiting member 134 and the fixed frame 18 of the above-mentioned first transmission connecting rod 141, the fixed frame 18 is a frame of a planar four-bar mechanism. Since the first crank 141e is rotationally connected to the fixed frame 18 (frame), and the second limiting member 134 is slidingly connected to the fixed frame 18 (frame), the first crank 141e is a crank of the planar four-bar mechanism, the second limiting member 134 is a slider of the planar four-bar mechanism, the first pushing member 131 is not directly connected to the fixed frame 18 (frame), the first pushing member 131 is a connecting rod of the planar four-bar mechanism, and the first crank 141e, the first pushing member 131, the second limiting member 134 and the fixed frame 18 form a first crank slider mechanism. Similarly, among the second crank 142e, the second pushing member 132, the first limiting member 131 and the fixed frame 18 of the above-mentioned second transmission mechanism 142, the fixed frame 18 is a frame of a planar four-bar mechanism. Since the second crank 142e is rotationally connected to the fixed frame 18 (frame), and the first limiting member 133 is slidingly connected to the fixed frame 18 (frame), the second crank 142e is a crank of the planar four-bar mechanism, the first limiting member 133 is a slider of the planar four-bar mechanism, the second pushing member 132 is not directly connected to the fixed frame 18 (frame), and the second pushing member 132 is a connecting rod of the planar four-bar mechanism. The second crank 142e, the second pushing member 132, the first limiting member 131 and the fixed frame 18 form a second crank slider mechanism.

[0146] In the above-mentioned first crank slider mechanism, the first pusher 131 is connected to the first crank 141e and the second limiter 134 at both ends along the width direction Y of the fixed frame 18, respectively, and the first crank 141e and the second limiter 134 are arranged along the width direction Y of the fixed frame 18, so that the first pusher 131 moves in a plane driven by the first crank 141e and the second limiter 134, and the movement of the first pusher 131 at least includes a partial movement along the width direction Y of the fixed frame 18, thereby realizing the movement of the second rotating shaft 152 connected to the first pusher 131 along the width direction Y of the fixed frame 18. In this embodiment, the third preset trajectory of the first pusher 131 can be a curved motion within the plane where the first crank slider mechanism is located, and the third preset trajectory has a sub-trajectory along the width direction Y of the fixed frame 18, and also has a sub-trajectory along the thickness direction Z of the fixed frame 18, that is, the first pusher 131 can move relative to the fixed frame 18 along the width direction Y of the fixed frame 18, and can also move along the thickness direction Z of the fixed frame 18.

[0147] Similarly, in the above-mentioned second crank slider mechanism, the second pusher 132 is respectively connected to the second crank 142e and the first limiter 133 at both ends along the width direction Y of the fixed frame 18, and the second crank 142e and the first limiter 133 are arranged along the width direction Y of the fixed frame 18, so that the second pusher 132 moves in a plane driven by the second crank 142e and the first limiter 133, and the movement of the second pusher 132 at least includes a partial movement along the width direction Y of the fixed frame 18, thereby realizing the movement of the first rotating shaft 151 connected to the second pusher 132 along the width direction Y of the fixed frame 18. In this embodiment, the fourth preset trajectory of the second pusher 132 can be a curved motion within the plane where the second crank slider mechanism is located, and the fourth preset trajectory has a sub-trajectory along the width direction Y of the fixed frame 18, and also has a sub-trajectory along the thickness direction Z of the fixed frame 18, that is, the second pusher 132 can move relative to the fixed frame 18 along the width direction Y of the fixed frame 18, and can also move along the thickness direction Z of the fixed frame 18.

[0148] Specifically, Fig.21 As shown, in order to realize the curvilinear motion of the first push member 131, the second stopper 134 is provided with a first mounting groove, and the first push member 131 is movably mounted in the first mounting groove, so that the first push member 131 can move along the thickness direction Z of the fixing frame 18 relative to the second stopper 134, and the second stopper 134 drives the first push member 131 to move along the width direction Y of the fixing frame 18 during the movement along the width direction Y of the fixing frame 18. Similarly, in order to realize the curvilinear motion of the second push member 132, the first stopper 133 is provided with a second mounting groove, and the second push member 132 is movably mounted in the second mounting groove, so that the second push member 132 can move along the thickness direction Z of the fixing frame 18 relative to the first stopper 133, and the first stopper 133 drives the second push member 132 to move along the width direction Y of the fixing frame 18 during the movement along the width direction Y of the fixing frame 18.

[0149] At the same time, the first mounting groove and the second mounting groove are both recessed along the thickness direction Z of the fixing frame 18, which can reduce the thickness of the first pushing member 131 when installed in the first mounting groove and the thickness of the second pushing member 132 when installed in the second mounting groove, thereby reducing the size of the folding device 1 along the thickness direction Z of the fixing frame 18, which is conducive to the miniaturization and thinness of the folding device 1 and the electronic device.

[0150] exist Fig. 20 and Fig.21 In the embodiment shown, the sliding of the slider (second stopper 134) of the first crank slider mechanism and the slider (first stopper 133) of the second crank slider mechanism relative to the frame (fixed frame 18) is achieved by the following structure. Fig.21 As shown, the fixing frame 18 includes a plurality of separately arranged fixing blocks 182, and the plurality of fixing blocks 182 are arranged at intervals along the length direction X of the fixing frame 18, and the first limiting member 133 and the second limiting member 134 in the above-mentioned two crank slider mechanisms are located between adjacent fixing blocks 182. At the same time, the fixing blocks are each provided with a slide groove 182a, and the slide groove 182a extends along the width direction Y of the fixing frame 18.

[0151] like Fig.21 As shown, the first position limiting member 133 is provided with a first protrusion 133a, and the first protrusion 133a is provided on both sides of the first position limiting member 133 along the length direction X of the fixing frame 18, and the first protrusion 133a is respectively matched with the slide groove 182a of the fixing block 182 located on both sides of the first position limiting member 133 along the length direction X of the fixing frame 18, so that the first position limiting member 133 can slide along the width direction Y of the fixing frame 18 through the cooperation between the first protrusion 133a and the slide groove 182a. At the same time, the second limiting member 134 is provided with a second protrusion 134a, and the second protrusion 134a is provided on both sides of the second limiting member 134 along the length direction X of the fixing frame 18, and the second protrusion 134a is respectively cooperated with the sliding groove 182a of the fixing block 182 located on both sides of the second limiting member 134 along the length direction X of the fixing frame 18, so that the second limiting member 134 can slide along the width direction Y of the fixing frame 18 through the cooperation between the second protrusion 134a and the sliding groove 182a.

[0152] Of course, the first limiting member 133 and the second limiting member 134 may also be provided with a slide groove extending along the width direction Y of the fixing frame 18 , and correspondingly, the fixing block 182 may also be provided with a first protruding portion and a second protruding portion.

[0153] In other specific embodiments, Fig. 22 and Fig.23 In the embodiment shown, when the first pushing member 131 is slidably connected to the fixed frame 18 and the second pushing member 132 is slidably connected to the fixed frame 18, the transmission assembly of the folding device 1 may also not include the above-mentioned first limit member and the second limit member. At this time, the movement of the second pushing member 132 and the first pushing member 131 can be limited by the first rotating shaft 151 and the second rotating shaft 152.

[0154] Specifically, Fig.23As shown, the second rotating shaft 152 is arranged on the first pushing member 131, that is, the second rotating shaft 152 is fixedly connected to the first pushing member 131, and the first swing arm 121 is rotatably connected to the second rotating shaft 152, that is, the first swing arm 121 can rotate relative to the second rotating shaft 152; the first rotating shaft 151 is arranged on the second pushing member 132, and the second swing arm 122 is rotatably connected to the first rotating shaft 151, that is, the second swing arm 122 can rotate relative to the first rotating shaft 151. In order to realize the sliding connection between the first pushing member 131 and the fixed frame 18 and the sliding connection between the second pushing member 132 and the fixed frame 18, the fixed frame 18 includes a plurality of separately arranged fixed blocks 182, and the plurality of fixed blocks 182 are arranged at intervals along the length direction X of the fixed frame 18, and the fixed block 182 is provided with a plurality of slide grooves 182a extending along the width direction Y of the fixed frame 18, and the second rotating shaft 152 arranged on the first pushing member 131 is slidably connected with the corresponding slide groove 182a, so that the second rotating shaft 152 can slide along the slide groove 182a, and the second rotating shaft 152 can move along the width direction Y of the fixed frame 18; the first rotating shaft 151 arranged on the second pushing member 132 is slidably connected with the corresponding slide groove 182a, so that the first rotating shaft 151 can slide along the slide groove 182a, and the first rotating shaft 151 can move along the width direction Y of the fixed frame 18.

[0155] In this embodiment, the first rotating shaft 151 and the slide groove 182a that cooperate with each other can limit the movement of the second pushing member 132, so that the second pushing member 132 moves along a fifth preset trajectory, wherein the fifth preset trajectory of the second pushing member 132 can be a curved motion or a linear motion within the plane where the width direction Y and the thickness direction Z of the fixing frame 18 are located. The fifth preset trajectory includes a sub-trajectory along the width direction Y of the fixing frame 18, and also includes a sub-trajectory along the thickness direction Z of the fixing frame 18, so that the second pushing member 132 can move relative to the fixing frame 18 along the width direction Y of the fixing frame 18, and can also move along the thickness direction Z of the fixing frame 18. At the same time, the second rotating shaft 152 and the slide groove 182a that cooperate with each other can limit the movement of the first pushing member 131, so that the first pushing member 131 moves along a sixth preset trajectory, wherein the sixth preset trajectory of the first pushing member 131 can be a curved motion or a linear motion within the plane where the width direction Y and the thickness direction Z of the fixing frame 18 are located, and the sixth preset trajectory includes a sub-trajectory along the width direction Y of the fixing frame 18, and also includes a sub-trajectory along the thickness direction Z of the fixing frame 18, so that the first pushing member 131 can move relative to the fixing frame 18 along the width direction Y of the fixing frame 18, and can also move along the thickness direction Z of the fixing frame 18.

[0156] Based on this, Fig.23In the illustrated embodiment, the slide groove 182a can be tilted or arc-shaped. When the slide groove 182a is tilted or arc-shaped, the height of the slide groove 182a is different along the thickness direction Z of the fixing frame 18, so as to realize the movement of the first pusher 131 and the second pusher 132 along the width direction Y and the thickness direction Z of the fixing frame 18. When the first pusher 131 and the second pusher 132 move along the width direction Y of the fixing frame 18 and tilt along the thickness direction Z of the fixing frame 18, the first pusher 131 and the first transmission link 141 and the second swing arm 122 connected thereto can be prevented from getting stuck, and the second pusher 132 and the second transmission link 142 and the first swing arm 121 connected thereto can be prevented from getting stuck.

[0157] In the above embodiments, Fig.21 and Fig.26 As shown, the folding device 1 may further include a synchronous gear set 16, which is used to transmit the movement between the first rotating frame 111 and the second rotating frame 112, so that during the folding and unfolding process, the first transmission part 141 and the second transmission part 142 move synchronously, thereby improving the stability and reliability of the folding device 1 and the electronic device during the unfolding and folding process.

[0158] Specifically, Fig.21 and Fig.26 As shown, the synchronous gear set 16 includes a second gear 161 and a third gear 162 meshing with each other. The second gear 161 is connected to the first transmission link 141 through the third rotating shaft 153. During the rotation of the second gear 161, the first transmission link 141 can rotate around the third rotating shaft 153. The reference numeral 153 in FIG. 21 indicates the position of the axis of the third rotating shaft 153. Similarly, Fig.21 and Fig.26 As shown, the third gear 162 is connected to the second transmission link 142 via the fourth rotating shaft 154. During the rotation of the third gear 162, the second transmission link 142 can rotate around the fourth rotating shaft 154. Fig.21 The reference numeral 154 indicates the position of the axis of the fourth rotating shaft 154 .

[0159] In this embodiment, the second gear 161 and the first transmission link 141 rotate around the same rotation axis (the third rotation axis 153), and the third gear 162 and the second transmission link 142 rotate around the same rotation axis (the fourth rotation axis 154), thereby realizing the synchronous rotation of the second gear 161 and the first transmission link 141, and the third gear 162 and the second transmission link 142, and the first transmission link 141 is connected to the first rotating frame 111, and the second transmission link 142 is connected to the second rotating frame 112, thereby realizing the synchronous rotation of the first rotating frame 111 and the second rotating frame 112.

[0160] like Fig.21 and Fig.26 As shown, the synchronous gear set 16 also includes a fourth gear 163 and a fifth gear 164 that mesh with each other, wherein the fourth gear 163 meshes with the second gear 161, the fifth gear 164 meshes with the third gear 162, and the second gear 161, the fourth gear 163, the fifth gear 164 and the third gear 162 are arranged along the width direction Y of the fixed frame 18.

[0161] In this embodiment, by adding a fourth gear 163 and a fifth gear 164 that mesh with the second gear 161 and the third gear 162, it is possible to achieve the meshing of the second gear 161 and the third gear 162 while reducing the diameters of the second gear 161 and the third gear 162, thereby reducing the space occupied by the synchronous gear set 16 along the width direction Y and the thickness direction Z of the fixed frame 18, which is beneficial to realizing the miniaturization and thinness of the folding device 1.

[0162] It should be noted that if Fig.11 , Fig.12 , Fig.18 and Fig.19 As shown, the folding device 1 may include a plurality of the above-mentioned rotating frame assemblies 11, a plurality of swing arm assemblies 12, a plurality of push groups 13 and a plurality of transmission groups 14, and the plurality of rotating frame assemblies 11 are distributed along the length direction X of the fixed frame 18, the plurality of swing arm assemblies 12 are distributed along the length direction X of the fixed frame 18, the plurality of push groups 13 are distributed along the length direction X of the fixed frame 18, and the plurality of transmission groups 14 are distributed along the length direction X of the fixed frame 18.

[0163] In the above embodiments, Fig. 9 , Fig.11 and Fig.12 As shown, the folding device 1 may further include a support plate assembly 17, which is used to connect with the flexible screen 2 of the electronic device, so that the flexible screen 2 can be folded or unfolded under the drive of the folding device 1. The specific structure of the support plate assembly 17 is described in detail below.

[0164] The support plate assembly 17 includes a first support plate 171 and a second support plate 172 arranged on both sides of the fixed frame 18 along the width direction Y of the fixed frame 18, wherein the first support plate 171 and the second support plate 172 are used to connect with the flexible screen 2 of the electronic device, specifically, the first support plate 171 and the second support plate 172 are used to connect with the folding part 26 of the flexible screen 2 (the connection method can be adhesion). The first support plate 171 is rotatably connected to the first rotating frame 111, that is, the first support plate 171 can rotate relative to the first rotating frame 111, and at the same time, the first support plate 171 is slidably connected to the first transmission link 141 and can rotate relatively; the second support plate 172 is rotatably connected to the second rotating frame 112, that is, the second support plate 172 can rotate relative to the second rotating frame 112, and at the same time, the second support plate 172 is slidably connected to the second transmission link 142 and can rotate relatively. Meanwhile, the support plate assembly 17 may further include a third support plate 173 , which is fixedly connected to the fixing frame 18 , and is located between the first support plate 171 and the second support plate 172 along the width direction Y of the fixing frame 18 .

[0165] Specifically, Fig.11 and Fig.18 As shown, the first support plate 171 is rotatably connected to the first rotating frame 111 via the eleventh rotating shaft 158, thereby realizing relative rotation between the first support plate 171 and the first rotating frame 111; the second support plate 172 is rotatably connected to the second rotating frame 112 via the twelfth rotating shaft 159, thereby realizing relative rotation between the second support plate 172 and the second rotating frame 112. In this embodiment, when the first rotating frame 111 and the first support plate 171 rotate relative to each other, and the second rotating frame 112 and the second support plate 172 rotate relative to each other, the first support plate 171 and the first rotating frame 111 can be prevented from getting stuck, and the second support plate 172 and the second rotating frame 112 can be prevented from getting stuck during the folding or unfolding process of the folding device 1.

[0166] More specifically, if Fig.28 As shown, the first support plate 171 includes a first body portion 1711, and the first body portion 1711 is provided with a first arc groove 1715. Fig.15 , Fig.16 and Fig.21As shown in the figure, the first rotating frame 111 includes a third protrusion 111c, at least part of which is located in the first arc-shaped groove 1715 and can rotate relative to the first arc-shaped groove 1715, thereby realizing the relative rotation between the first support plate 171 and the first rotating frame 111. Similarly, the second support plate 172 includes a second body part (the structure of the second body part can be the same as that of the first body part 1711), and the second body part is provided with a second arc-shaped groove (not shown in the figure). Accordingly, as shown in the figure Fig.15 , Fig.17 and Fig.21 As shown, the second rotating frame 112 includes a fourth protrusion 112 c , at least a portion of which is located in the second arc groove and can rotate relative to the second arc groove, thereby achieving relative rotation between the second support plate 172 and the second rotating frame 112 .

[0167] On the other hand, in the folding device 1, the sliding connection and relative rotation between the first support plate 171 and the first transmission link 141, and the sliding connection and relative rotation between the second support plate 172 and the second transmission link 142 are achieved through the following structure.

[0168] Specifically, Figures 29 to 31 As shown, the first support plate 171 also includes a first extension portion 1712, which is fixedly connected to or integrally formed with the first body portion 1711, and the first extension portion 1712 extends relative to the first body portion 1711 toward the first rotating frame 111. One of the first transmission link 141 and the first extension portion 1712 of the first support plate 171 is provided with a first track 1713, and the other is provided with a first slider 141d, and the first slider 141d can slide along the first track 1713, thereby achieving relative sliding between the first support plate 171 and the first transmission link 141. At the same time, as shown in FIG. Fig.30 As shown, the second support plate 172 includes a second body portion 1721 and a second extension portion 1722, wherein the second extension portion 1722 is fixedly connected to or integrally formed with the second body portion 1721, and the second extension portion 1722 extends relative to the second body portion 1721 toward the second rotating frame 112. One of the second extension portions 1722 of the second support plate 172 is provided with a second track 1723, and the other is provided with a second slider 142d, and the second slider 142d can slide along the second track 1723, thereby realizing relative sliding between the second support plate 172 and the second transmission link 142.

[0169] like Figures 29-30In the embodiment shown, the first track 1713 is disposed on the first extension portion 1712 of the first support plate 171, and the first slider 141d is disposed on the first transmission link 141. Of course, the first track can also be disposed on the first transmission link 141, and the first slider can also be disposed on the first extension portion 1712 of the first support plate 171. Fig.21 and Fig.30 In the embodiment shown, the second track 1723 is disposed on the second extension portion 1722 of the second support plate 172. Fig.21 As shown, the second slider 142d is disposed on the second transmission connecting rod 142. Of course, the second track can also be disposed on the second transmission connecting rod 142, and the second slider can also be disposed on the second extension portion 1722 of the second support plate 172.

[0170] In addition, along the length direction X of the fixing frame 18, the first support plate 171 may be provided with a plurality of first rails 1713, and correspondingly, the first transmission link 141 may be provided with a plurality of first sliders 141d, and the first sliders 141d are matched with the first rails 1713, so as to improve the reliability of the sliding connection between the first support plate 171 and the first transmission link 141. Along the length direction X of the fixing frame 18, the second support plate 172 may be provided with a plurality of second rails 1723, and the second transmission link 142 may be provided with a plurality of second sliders 142d, and the second sliders 142d are matched with the second rails 1723, so as to improve the reliability of the sliding connection between the second support plate 172 and the second transmission link 142. Fig. 9 and Fig.30 As shown, along the width direction Y of the fixing frame 18, the first support plate 171 has a first end 1714 and a second end 1716 that are oppositely arranged, wherein the first end 1714 is far away from the fixing frame 18, and the second end 1716 is close to the fixing frame 18. Similarly, the second support plate 172 has a third end 1724 and a fourth end 1726 that are oppositely arranged, wherein the third end 1724 is far away from the fixing frame 18, and the fourth end 1726 is close to the fixing frame 18. When the folding device 1 is in the position as shown in FIG. Fig. 9 In the unfolded state shown, the first rotating frame 111 and the second rotating frame 112 are in the second position (expanded position), the second end 1716 of the first support plate 171 and the fourth end 1726 of the second support plate 172 are abutted or have a preset gap, and the distance between the first end 1714 of the first support plate 171 and the third end 1724 of the second support plate 172 is the first length L1 of the folding device 1 described above that cooperates with the folding part 26 of the flexible screen 2.

[0171] When the folding device 1 is in the folding process (from Fig.30 The status shown switches to Fig.31The first rotating frame 111 and the second rotating frame 112 rotate towards each other, and the first rotating frame 111 rotates around the first rotating shaft 151, and the second rotating frame 112 rotates around the second rotating shaft 152. Through the arrangement of the transmission components in the above embodiments, the first rotating shaft 151 and the second rotating shaft 152 move in a direction away from the fixed frame 15. Therefore, the movement of the first rotating frame 111 and the second rotating frame 112 includes rotation and movement, that is, the first rotating frame 111 rotates around the first rotating shaft 151 and moves in a direction away from the fixed frame 18, and the second rotating frame 112 rotates around the second rotating shaft 152 and moves in a direction away from the fixed frame 18.

[0172] At the same time, since the first rotating frame 111 is connected to the first supporting plate 171, and the second rotating frame 112 is connected to the second supporting plate 171, the first rotating frame 111 can drive the first supporting plate 171 to move and rotate during its rotation and movement, that is, the first supporting plate 171 rotates around the eleventh rotating shaft 158, and the second rotating frame 112 can drive the second supporting plate 172 to rotate around the twelfth rotating shaft 159 during its rotation and movement. Driven by the movement of the first rotating frame 111 and the second rotating frame 112, the second end 1716 of the first supporting plate 171 and the fourth end 1726 of the second supporting plate 172 move away from each other, so that the folding device 1 moves away from the first rotating frame 111 and the second rotating frame 112. Fig.30 The expanded state shown switches to Fig.31 In the folded state shown, the first rotating frame 111 and the second rotating frame 112 are in the first position (folded position). Similarly, since the first support plate 171 is slidably connected to the first transmission link 141, and the second support plate 172 is slidably connected to the second transmission link 172, during the rotation of the first support plate 171 and the second support plate 172 driven by the first rotating frame 111 and the second rotating frame 112, the first support plate 171 can slide and rotate relative to the first transmission link 141, and the sliding track of the first support plate 171 is the first track 1713, and the second support plate 172 can slide and rotate relative to the second transmission link 142, and the sliding track of the second support plate 172 is the second track 1723. Therefore, the first track 1713 is used to guide the relative sliding between the first support plate 171 and the first transmission link 141, and the second track 1723 is used to guide the relative sliding between the second support plate 172 and the second transmission link 142.

[0173] In this embodiment, Fig.31 As shown, when the first rotating frame 111 and the second rotating frame 112 are in the first position, the first supporting plate 171, the second supporting plate 172, the first transmission connecting rod 141, the second transmission connecting rod 142 and the fixing frame 18 form a receiving space 174. Figure 7 and Fig.31 The accommodating space 174 is used to accommodate the folding component 26 of the flexible screen 2. When the first rotating frame 111 drives the first supporting plate 171 to rotate and move in a direction away from the fixed frame 18, and the second rotating frame 112 drives the second supporting plate 172 to rotate and move in a direction away from the fixed frame 18, compared with the first rotating frame 111 only driving the first supporting plate 171 to rotate, and the second rotating frame 112 only driving the second supporting plate 172 to rotate, the folding device 1 is in a state as shown in FIG. Fig.31 In the folded state shown, the distance between the first support plate 171 and the fixed frame 18, and the distance between the second support plate 172 and the fixed frame 18 are larger, thereby increasing the second length L2 of the contour of the accommodating space 174 of the folding device 1, and further helping to achieve L1<L2, reducing the squeezing and pulling of the folding part 26 by the folding device 1 during the folding process, improving the reliability and structural strength of the flexible screen 2, and being able to reduce the requirements on the performance of the material of the flexible screen 2 and reduce costs.

[0174] On the other hand, when the folding device 1 is in the folded state, the first transmission link 141 and the second transmission link 142 both participate in forming the above-mentioned accommodating space 174. The specific structures of the first transmission link 141 and the second transmission link 142 are described in detail below.

[0175] Specifically, Fig.26 and Fig.31 As shown, the first transmission link 141 includes a first arc segment 141f and a first straight segment 141g, and the first arc segment 141f and the first straight segment 141g are distributed along the width direction Y of the fixed frame 18, and the two are fixedly connected or integrally formed, the first arc segment 141f and the fixed frame 18 are rotationally connected through the above-mentioned third rotating shaft 153, and the first straight segment 141g is slidably connected to the first support plate 171; the second transmission link 142 includes a second arc segment 142f and a second straight segment 142g, and the second arc segment 142f and the second straight segment 142g are distributed along the width direction Y of the fixed frame 18, and the two are fixedly connected or integrally formed, the second arc segment 142f and the fixed frame 18 are rotationally connected through the above-mentioned fourth rotating shaft 154, and the second straight segment 142g is slidably connected to the second support plate 172.

[0176] In this embodiment, Fig.31 As shown, when the folding device 1 is in the folded state, the first support plate 171, the second support plate 172, the first arc segment 141f of the first transmission link 141, the second arc segment 142f of the second transmission link 142 and the fixing frame 18 (or the third support plate 173) enclose the above-mentioned accommodation space 174. Fig.10As shown, the accommodation space 174 includes a third arc segment 174a, a third straight segment 174b and a fourth straight segment 174c, and the third arc segment 174a is located between the third straight segment 174b and the fourth straight segment 174c. The first arc segment 141f of the first transmission link 141 and the second arc segment 142f of the second transmission link 142 enclose the third arc segment 174a of the accommodation space 174, the first straight segment 141g of the first support plate 171 forms the third straight segment 174b of the accommodation space 174, and the second straight segment 142g of the second support plate 172 forms the fourth straight segment 174c of the accommodation space 174, thereby enclosing a "water drop-shaped" accommodation space 174. At this time, the difference between L2 and L1 is the circumference of the first arc segment 141f and the second arc segment 142f.

[0177] Meanwhile, in the accommodation space 174, the third arc segment 174a matches with the fifth portion 25 which is semicircular after folding, the third straight segment 174b matches with the third portion 23 which is planar after folding, and the fourth straight segment 174c matches with the fourth portion 24 which is planar after folding.

[0178] In the process of switching the folding device 1 from the unfolded state to the folded state, that is, the process of switching the first rotating frame 111 from the second position to the first position, the first rotating frame 111 and the second rotating frame 112 rotate toward each other and can drive the first support plate 171 to move in a direction away from the fixed frame 18, thereby exposing the first arc segment 141f of the first transmission link 141, and drive the second support plate 172 to move in a direction away from the fixed frame 18, thereby exposing the second arc segment 142f of the second transmission link 142, so that the first arc segment 141f The third arc segment 174a and the second arc segment 142f form an accommodating space 174 for accommodating the fifth part 25 of the folding part 26. At this time, compared with the accommodating space 174 consisting of the first support plate 171 and the second support plate 172 of the flat structure, the first arc segment 141f and the second arc segment 142f can reduce the extrusion on the fifth part 25 of the folding part 26, thereby reducing the extrusion of the folding device 1 (the first transmission link 141 and the second transmission link 142) on the flexible screen 2 during the folding process, and further improving the reliability and structural strength of the flexible screen 2.

[0179] Among them, the curvature and length of the first arc segment 141f and the second arc segment 142f can be specifically set according to the shape and size of the fifth part 25 of the flexible screen 2 in the folded state, so that the first arc segment 141f and the second arc segment 142f can be adapted to the fifth part 25, further reducing the extrusion of the folding device 1 on the folding part 26 of the flexible screen 2 during the folding process, and improving the flatness of the folding part 26 in the folded state.

[0180] In the above embodiments, the cooperation relationship between the folding device 1 and the flexible screen 2 in the unfolded state and the folded state is as follows. Fig.24 , Fig.25 and Fig.30 As shown, when the folding device 1 is in the unfolded state (the electronic device is in the unfolded state), the upper end surface of the first support plate 171, the upper end surface of the fixing frame 18 (or the upper end surface of the third support plate 173) and the upper end surface of the second support plate 173 are located in the same plane. At this time, along the width direction of the fixing frame 18, the second end 1716 of the first support plate 171 is connected to the fixing frame 18, and the fourth end 1726 of the second support plate 172 is connected to the fixing frame 18. At this time, the upper end surface of the first support plate 171, the upper end surface of the second support plate 172 and the fixing frame 18 (or the upper end surface of the third support plate 173) are connected to the fixing frame 18. The upper end surfaces of the third area 23, the fourth area 24 and the fifth area 25 of the flexible screen 2 jointly support the folding part 26 (including the third area 23, the fourth area 24 and the fifth area 25) of the flat flexible screen 2, so that the folding part 26 of the flexible screen 2 maintains a flat state. When the folding part 26 of the flexible screen 2 is subjected to external force (for example, the user presses, touches, etc. on the folding part 26 of the flexible screen 2, or the user holds the electronic device and applies force to the folding part 26 of the flexible screen 2), the risk of collapse or concave of the flexible screen 2 is low, the reliability of the flexible screen 2 is high, the service life is long, and the appearance and feel of the flexible screen 2 are also improved.

[0181] like Fig.31 As shown, when the folding device 1 is in a folded state (the electronic device is in a folded state), the first support plate 171 rotates and slides under the drive of the first rotating frame 111, and the second support plate 172 rotates and slides under the drive of the second rotating frame 112, and during the movement of the first support plate 171 and the second support plate 172, the first arc segment 141f of the first transmission link 141 and the second arc segment 142f of the second transmission link 142 are exposed, thereby forming an accommodating space 174 for accommodating the folding part 26 of the flexible screen 2, and the first arc segment 141f and the second arc segment 142f are used to accommodate the fifth part 25 of the flexible screen 2, and are adapted to the fifth part 25, so that the fifth part 25 has a naturally curved semicircular arc structure, that is, the fifth part 25 is neither squeezed nor pulled, thereby improving the reliability of the fifth part 25 during the folding process. At the same time, the accommodating space 174 also has sufficient space, so as to prevent the folding part 26 of the flexible screen 2 from arching in the accommodating space 174, thereby improving the flatness of the flexible screen 2 in the folded state.

[0182] The following describes in detail the specific structure of the first rail 1713 and the first slider 141a for realizing the sliding connection between the first transmission link 141 and the first support plate 171, and the specific structure of the second rail 1723 and the second slider 142a for realizing the sliding connection between the second transmission link 142 and the second support plate 172. Figures 29 to 31 As shown, the first track 1713 has a fifth end 1713a and a sixth end 1713b that are arranged opposite to each other, and the second track 1723 has a seventh end (not shown in the figure) and an eighth end 1723b that are arranged opposite to each other. Fig.30 In the unfolded state shown in FIG. 1 , the first slider 141d of the first transmission link 141 cooperates with the first track 1713 at the fifth end 1713a, and the second slider 142d of the second transmission link 142 cooperates with the second track 1723 at the seventh end; when the folding device 1 is in the unfolded state shown in FIG. Fig.31 In the folded state shown, the first slider 141d of the first transmission link 141 cooperates with the first track 1713 at the sixth end 1713b, and the second slider 142d of the second transmission link 142 cooperates with the second track 1723 at the eighth end 1723b.

[0183] When the folding device 1 is Fig.30 The expanded state shown switches to Fig.31 In the process of the folding state shown in FIG. 1 , that is, in the process of the first rotating frame 111 and the second rotating frame 112 rotating toward each other, the first slider 141d of the first transmission link 141 can slide from the fifth end 1713a of the first track 1713 to the sixth end 1713b, and the second slider 142d of the second transmission link 142 can slide from the seventh end of the second track 1723 to the eighth end 1723b; when the folding device 1 is moved from Fig.31 The folded state shown switches to Fig.30 During the unfolded state shown, that is, during the process of the first rotating frame 111 and the second rotating frame 112 rotating away from each other, the first slider 141d of the first transmission link 141 can slide from the sixth end 1713b of the first track 1713 to the fifth end 1713a, and the second slider 142d of the second transmission link 142 can slide from the eighth end 1723b of the second track 1723 to the seventh end.

[0184] At the same time, since the sixth end 1713b of the first track 1713 is closer to the fixing frame 18 than the fifth end 1713a, and the eighth end 1723b of the second track 1723 is closer to the fixing frame 18 than the seventh end, the folding device 1 is Fig.30 The expanded state shown switches to Fig.31During the folding state shown, that is, during the relative rotation of the first rotating frame 111 and the second rotating frame 112, the first support plate 171 can slide relative to the first transmission link 141 in a direction away from the fixed frame 18, that is, the second end 1716 of the first support plate 171 moves in a direction away from the fixed frame 18, thereby exposing the first arc segment 141f of the first transmission link 141. At the same time, the second support plate 172 can slide relative to the second transmission link 142 in a direction away from the fixed frame 18, that is, the fourth end 1726 of the second support plate 172 moves in a direction away from the fixed frame 18, thereby exposing the second arc segment 142f of the second transmission link 142. At this time, the first support plate 171, the first arc segment 141f, the fixed frame 18, the second arc segment 142f and the second support plate 172 form the above-mentioned accommodating space 174. Therefore, in this embodiment, the arrangement of the first track 1713 and the second track 1723 can enable the first support plate 171 and the second support plate 172 to move in a direction away from the fixing frame 18 during the folding process of the folding device 1 .

[0185] Specifically, Figures 29 to 31 In the embodiment shown, the first track 1713 is an arc structure or an inclined structure, and the second track 1723 is an arc structure or an inclined structure. At this time, the first track 1713 allows the first support plate 171 to slide relative to the first transmission link 141 while being able to rotate relative to each other to prevent the two from getting stuck, and the second track 1723 allows the second support plate 172 to slide relative to the second transmission link 142 while being able to rotate relative to each other to prevent the two from getting stuck. Fig.18 As shown, the folding device 1 may further include a shaft cover 181 , the fixing frame 18 is installed in the accommodating cavity 181 a of the shaft cover 181 , and at least a portion of the rotating frame 11 extends out of the shaft cover 181 .

[0186] In this embodiment, when the folding device 1 is in Figure 2 In the folded state shown in FIG. 1 , the hinge cover 181 wraps around the fixing frame 18 and other components, thereby improving the appearance of the electronic device, and the hinge cover 18 can protect the folding device 1. Figure 3 In the unfolded state shown, the shaft cover 3 can be hidden inside the first shell 21 and the second shell 22 .

[0187] In the above embodiments, in order to maintain the folding device 1 in an unfolded state or a folded state, the folding device 1 may also be provided with a damping assembly, which is used to provide a damping force to the first rotating frame 111 and the second rotating frame 112. The specific structure of the damping assembly is described in detail below.

[0188] Specifically, Fig.23As shown, the folding device 1 further comprises a first damping assembly 191 connected to the fixed frame 18 , the first damping assembly 191 and the transmission assembly are arranged along the length direction X of the fixed frame 18 , and are connected to the first rotating frame 111 and the second rotating frame 112 (including direct connection or indirect connection).

[0189] When the folding device 1 is in the unfolded state, the first damping component 191 can provide a first damping force, and the first damping force can act on the first rotating frame 111 and the second rotating frame 112, thereby providing resistance to the first rotating frame 111 and the second rotating frame 112 rotating toward each other, so that the folding device 1 can be maintained in the unfolded state, and when the folding device 1 needs to switch from the unfolded state to the folded state, the user needs to apply a driving force to the first rotating frame 111 and the second rotating frame 112 that can overcome the first damping force, so that the first rotating frame 111 and the second rotating frame 112 can overcome the first damping force, thereby switching the folding device 1 to the folded state. When the folding device 1 is in the folded state, the first damping component 191 can provide a second damping force, and the second damping force can act on the first rotating frame 111 and the second rotating frame 112, thereby providing resistance to the first rotating frame 111 and the second rotating frame 112 rotating in opposite directions, so that the folding device 1 can be maintained in the folded state, and when the folding device 1 needs to be switched from the folded state to the unfolded state, the user needs to apply a driving force that can overcome the second damping force to the first rotating frame 111 and the second rotating frame 112, so that the first rotating frame 111 and the second rotating frame 112 can overcome the second damping force, thereby switching the folding device 1 to the unfolded state. At the same time, during the folding or unfolding process of the folding device 1 (when the first rotating frame 111 and the second rotating frame 112 rotate toward or away from each other), the first damping component 191 can also provide a third damping force, thereby providing torque for the unfolding and folding process of the electronic device, thereby improving the user experience during the unfolding and folding process.

[0190] The folding device 1 may include a plurality of first damping assemblies 191 , and each first damping assemblies 191 is arranged at intervals along the length direction X of the fixing frame 18 . Along the length direction X of the fixing frame 18 , the first damping assemblies 191 are located between adjacent synchronous gear sets 16 .

[0191] Specifically, the specific structure of the first damping component 191 is as follows. Figures 32-34As shown, the first damping assembly 191 includes a first rotating arm 1914 and a second rotating arm 1915, and the first rotating arm 1914 and the second rotating arm 1915 are distributed along the width direction Y of the fixed frame 18. The rotating frame assembly 11 of the folding device 1 also includes a third rotating frame 114 and a fourth rotating frame 115, and the third rotating frame 114 and the fourth rotating frame 115 are located on both sides of the fixed frame 18 along the width direction Y, and the third rotating frame 114 is fixedly connected to the first rotating frame 111, and the two can be directly fixedly connected or indirectly connected through the first support plate 171, and the fourth rotating frame 115 is fixedly connected to the second rotating frame 112, and the two can be directly fixedly connected or indirectly connected through the second support plate 172. Among them, the magnitudes of the first damping force and the second damping force can be the same or different, and the third damping force can be smaller than the first damping force and the second damping force.

[0192] Among them, Fig.32 and Fig.33 As shown, the first rotating arm 1914 is provided with a thirteenth rotating shaft 1914b, and the first rotating arm 1914 is rotatably connected to the third rotating frame 114 through the thirteenth rotating shaft 1914b. At the same time, as shown in FIG34, the third rotating frame 114 has a first sliding space 114a, and one end of the first rotating arm 1914 provided with the thirteenth rotating shaft 1914b extends into the first sliding space 114a and can slide in the first sliding space 114a, that is, the first rotating arm 1914 and the third rotating frame 114 are slidably connected and can rotate relatively, so that the first rotating arm 1914 can rotate with the first rotating frame 111 under the drive of the third rotating frame 114. Fig.32 and Fig.33 As shown, the second rotating arm 1915 is provided with a fifteenth rotating shaft 1915b, and the second rotating arm 1915 is rotatably connected to the fourth rotating frame 115 via the fourteenth rotating shaft 1915b. Fig.34 As shown, the fourth rotating frame 115 has a second sliding space 115a, and one end of the second rotating arm 1915 provided with the fourteenth rotating shaft 1915b extends into the second sliding space 115a and can slide in the second sliding space 115a, that is, the second rotating arm 1915 and the fourth rotating frame 115 are slidingly connected and can rotate relative to each other, so that the second rotating arm 1915 can rotate with the second rotating frame 112 under the drive of the fourth rotating frame 115, preventing the first rotating arm 1914 and the second rotating arm 1915 from affecting the relative rotation of the first rotating frame 111 and the second rotating frame 112.

[0193] At the same time, the first damping assembly 191 also includes at least two first gears 1913 meshing with each other, and the at least two first gears 1913 are distributed and meshed along the width direction Y of the fixing frame 18, and the first rotating arm 1914 is provided with a first tooth portion 1914a at one end away from the thirteenth rotating shaft 1914b, and the second rotating arm 1915 is provided with a second tooth portion 1915a at one end away from the fourteenth rotating shaft 1915b, and the first tooth portion 1914a and the second tooth portion 1915a are respectively meshed with the corresponding first gears 1913. In this embodiment, by providing the meshing first gears 1913, the first tooth portion 1914a and the second tooth portion 1915a, the first rotating arm 1914 and the second rotating arm 1915 can achieve synchronous rotation.

[0194] Specifically, Fig.33 As shown, the first damping assembly 191 further includes a cam 1911, and the cam 1911 and the first gear 1913 are distributed along the length direction X of the fixing frame 18, and the cam 1911 can be provided on both sides of the first gear 1913 along the length direction X of the fixing frame 18, and the cam 1911 and the first cam 1913 are arranged opposite to each other along the length direction X of the fixing frame 18. Fig.33 As shown, the cam 1911 has a first concave-convex surface 1911a at the end portion facing the first gear 1913 along the length direction X of the fixing frame 18. Fig.35 As shown, the first gear 1913 has a second concave-convex surface 1913 a at the end portion facing the cam 1911 along the width direction Y of the fixing frame 18 , and the first concave-convex surface 1911 a and the second concave-convex surface 1913 a can mesh with each other.

[0195] At the same time, if Fig.32 and Fig.33 As shown, the first damping assembly 191 may also include a first elastic member 1912, wherein the elastic deformation direction of the first elastic member 1912 is parallel to the length direction X of the fixing frame 18, and the first elastic member 1912 is located on the side of the cam 1911 away from the first gear 1913, one end along the length direction Y of the fixing frame 18 is connected to the cam 1911, and the other end is connected to the fixing frame 18, that is, when the first elastic member 1912 is elastically deformed, it can apply an elastic force along the length direction X of the fixing frame 18 to the cam 1911. When the first gear 1913 has cams 1911 on both sides along the length direction X of the fixing frame 18, the first damping assembly 191 includes two first elastic members 1912, and the two first elastic members 1912 are respectively matched with the two cams 1911. The first elastic member 1912 is in a compressed state.

[0196] It can be understood that the process in which the first concave-convex surface 1911a of the cam 1911 and the second concave-convex surface 1913a of the first gear 1913 are meshed includes at least the following three situations: the first situation is that the convex surface of the first concave-convex surface 1911a matches with the convex surface of the second concave-convex surface 1913a. At this time, the cam 1911 moves toward the direction of the corresponding first elastic member 1912 and compresses the first elastic member 1912, so that the first elastic member 1912 has a first deformation amount. At this time, the first elastic member 1912 in a compressed state can apply a first elastic force to the first gear 1913 through the cam 1911; the second situation is that the convex surface of the first concave-convex surface 1911a matches with the concave surface of the second concave-convex surface 1913a, or the concave surface of the first concave-convex surface 1911a matches with the convex surface of the second concave-convex surface 1913a. At this time, the first elastic member 1912 in a compressed state can apply a first elastic force to the first gear 1913 through the cam 1911. The first elastic member 1912 in the compressed state can apply a second elastic force to the first gear 1913 through the cam 1911, wherein the first elastic member 1912 has a second deformation amount, and the second deformation amount is smaller than the first deformation amount, and the second elastic force is smaller than the first elastic force; the third type, the concave surface of the first concave-convex surface 1911a cooperates with the concave surface of the second concave-convex surface 1913a. At this time, the first elastic member 1912 in the compressed state can apply a third elastic force to the first gear 1913 through the cam 1911, wherein the first elastic member 1912 has a third deformation amount, and the third deformation amount is smaller than the first deformation amount and smaller than the second deformation amount, and the third elastic force is smaller than the first elastic force and smaller than the second elastic force.

[0197] In this embodiment, the magnitude of the damping force applied by the first damping assembly 191 is determined by the magnitude of the elastic force of the first elastic member 1912, and when the first rotating frame 111 and the second rotating frame 112 drive the first rotating arm 1914 and the second rotating arm 1915 to rotate, the first gear 1913 can rotate accordingly, thereby changing the matching position of the first concave-convex surface 1911a and the second concave-convex surface 1913a, and the matching position of the two switches between the above three situations.

[0198] In the first specific embodiment, when the folding device 1 is in the folded state or the unfolded state, it can be the first case mentioned above. At this time, when the folding device 1 needs to switch between the folded state and the unfolded state, the external force applied needs to be able to overcome the first elastic force of the first elastic member 1912, and the folding device 1 can be in the second case or the third case mentioned above during the switching between the folded state and the unfolded state, that is, during the folding or unfolding process, the first damping component 191 can provide a damping force of the same magnitude as the second elastic force or the third elastic force. In the second specific embodiment, when the folding device 1 is in the folded state or the unfolded state, it can be in the second case mentioned above. At this time, when the folding device 1 needs to switch between the folded state and the unfolded state, the external force applied needs to be able to overcome the second elastic force of the first elastic member 1912, and the folding device 1 can be in the third case mentioned above during the switching between the folded state and the unfolded state, that is, during the folding or unfolding process, the first damping component 191 can provide a damping force of the same magnitude as the third elastic force.

[0199] In addition, during the meshing process of the first concave-convex surface 1911a and the second concave-convex surface 1913a, the inclined surfaces of the two cooperate, that is, the interaction force between the first concave-convex surface 1911a and the second concave-convex surface 1913a is along the inclined surface (concave surface or convex surface) perpendicular to the two. The interaction force acting on the inclined surface (concave surface or convex surface) can generate a component force that drives the first gear 1913 to rotate, thereby generating a driving force that drives the first rotating arm 1914 and the second rotating arm 1915 to rotate toward or away from each other, so that the folding device 1 can be automatically folded or unfolded.

[0200] The first damping assembly 191 may include a plurality of cams 1911 , and the number of the cams 1911 may be the same as the number of the first gears 1913 , so that each first gear 1913 can be subjected to a damping force.

[0201] Specifically, Fig.32 and Fig.33 As shown, the first damping assembly 191 may further include a mounting member 1916, and when the first damping assembly 191 includes two cams 1911 and two first elastic members 1912, there are also two mounting members 1916, and the two mounting members 1916 are distributed along the length direction X of the fixing frame 18 and are located on both sides of the first gear 1913 along the length direction X of the fixing frame 18. The mounting member 1916 has a mounting space 1916a, and the cam 1911 and the first elastic member 1912 are located in the corresponding mounting space 1916a. At this time, the mounting member 1916 is used to mount the cam 1911 and the first elastic member 1912.

[0202] At the same time, if Figures 32-34As shown, the first damping assembly 191 further includes a pin shaft 1918 extending along the length direction X of the fixing frame 18, the pin shaft 1918 passes through the first gear 1913, so that the first gear 1913 can rotate around the pin shaft 1918, and the cam 1911 and the first elastic member 1912 are sleeved on the pin shaft 1918. Fig.32 and Fig.33 As shown, the mounting member 1916 includes a pressing plate 1916b, which participates in enclosing the above-mentioned mounting space 1916a, and the pressing plate 1916b is provided with a rotating hole, and the pin shaft 1918 can pass through the rotating hole and can rotate in the rotating hole, and the pin shaft 1918 extends out of the outside of the mounting member 1916 through the rotating hole, and the portion of the pin shaft 1918 extending out of the outside of the mounting member 1916 is provided with a clamping groove 1918a, and the clamping groove 1918a is used to clamp with the clamping member 1917, so as to clamp the various components of the first damping assembly 193 through the clamping member 1917, and make the first elastic member 1912 in a compressed state. Among them, the two ends of the first elastic member 1912 are elastically abutted against the pressing plate 1916b and the cam 1911 respectively.

[0203] In addition, if Figures 32-34 In the illustrated embodiment, the first tooth portion 1914a and the second tooth portion 1915a are also provided with a pin 1918, so that the first tooth portion 1914a rotates around the pin 1918 passing through the first tooth portion 1914a, and the second tooth portion 1915a rotates around the pin 1918 passing through the second tooth portion 1915a.

[0204] Among them, combined Fig.26 and Fig.34 The third rotating shaft 153 of the second gear 161 in the above-mentioned synchronous gear set 16 is coaxial with the pin shaft 1918 of the first tooth portion 1914a in the first damping assembly 191, that is, the second gear 161 and the first tooth portion 1914a rotate around the same rotating shaft, the fourth rotating shaft 154 of the third gear 162 in the synchronous gear set 16 is coaxial with the pin shaft 1918 of the second tooth portion 1915a in the first damping assembly 191, that is, the third gear 162 and the second tooth portion 1915a rotate around the same rotating shaft, and the rotating shafts of the fourth gear 164 and the fifth gear 165 in the synchronous gear set 16 are respectively coaxial with the pin shafts 1918 of the two first gears 1913 in the first damping assembly 191, that is, the fourth gear 164 and the fifth gear 165 respectively rotate with the two first gears 1913 around the same rotating shaft. In this embodiment, the first rotating frame 111 and the third rotating frame 114 can rotate synchronously, and the second rotating frame 112 and the fourth rotating frame 115 can rotate synchronously.

[0205] In the above embodiments, the folding device 1 may further include a second damping component 192 and a third damping component 193. Fig.23As shown, the second damping assembly 192 is connected to the first rotating frame 111 for providing damping force for the first rotating frame 111 , and the third damping assembly 193 is connected to the second rotating frame 112 for providing damping force for the second rotating frame 112 .

[0206] Specifically, when the folding device 1 is in the unfolded state, the second damping assembly 192 can provide a fourth damping force, which can act on the first rotating frame 111, thereby providing resistance to the rotation of the first rotating frame 111, and the third damping assembly 193 can provide a fifth damping force, which can act on the second rotating frame 112, thereby providing resistance to the rotation of the second rotating frame 112, so that the first rotating frame 111 and the second rotating frame 112 can be maintained in the unfolded position, that is, the folding device 1 can be maintained in the unfolded state. And when the folding device 1 needs to switch from the unfolded state to the folded state, the user needs to apply a driving force that can overcome the fourth damping force to the first rotating frame 111, and apply a driving force that can overcome the fifth damping force to the second rotating frame 112, so that the first rotating frame 111 and the second rotating frame 112 can rotate towards each other, so that the folding device 1 switches from the unfolded state to the folded state.

[0207] When the folding device 1 is in the folded state, the second damping member group 192 can provide a sixth damping force, which can act on the first rotating frame 111, thereby providing resistance to the rotation of the first rotating frame 111, and the third damping assembly 193 can provide a seventh damping force, which can act on the second rotating frame 112, thereby providing resistance to the rotation of the second rotating frame 112, so that the first rotating frame 111 and the second rotating frame 112 can be maintained in the folded position, that is, the folding device 1 can be maintained in the folded state. And when the folding device 1 needs to switch from the folded state to the unfolded state, the user needs to apply a driving force that can overcome the sixth damping force to the first rotating frame 111, and apply a driving force that can overcome the seventh damping force to the second rotating frame 112, so that the first rotating frame 111 and the second rotating frame 112 can rotate in opposite directions, so that the folding device 1 switches from the folded state to the unfolded state. At the same time, during the folding or unfolding process of the folding device 1 (during the process of the first rotating frame 111 and the second rotating frame 112 rotating toward or away from each other), the second damping component 192 can apply the eighth damping force to the first rotating frame 111, and the third damping component 193 can apply the ninth damping force to the second rotating frame 112, thereby providing torque for the electronic device during the unfolding and folding process, thereby improving the user experience during the folding and unfolding process.

[0208] The folding device 1 may include one or more second damping components 192, that is, all of the first rotating frame 111 or part of the first rotating frame 111 are provided with the second damping component 192, and may also include one or more third damping components 193, that is, all of the second rotating frame 112 or part of the second rotating frame 112 are provided with the third damping component 193. In addition, the folding device 1 may also include only the second damping component 192, or only the third damping component 193. When the folding device 1 includes the second damping component 192 and the third damping component 193, both the first rotating frame 111 and the second rotating frame 112 can be subjected to the damping force, thereby improving the synchronization of the first rotating frame 111 and the second rotating frame 112.

[0209] The specific structures of the second damping assembly 192 and the third damping assembly 193 are described in detail below, and only the structure and motion relationship of the second damping assembly 192 are described as an example. The structure and motion relationship of the third damping assembly 193 are similar to those of the second damping assembly 192, and the only difference is that the third damping assembly 193 cooperates with the second rotating frame 112 and is installed on the second transmission link 142, so as to provide damping force for the second rotating frame 112.

[0210] Specifically, Fig.37 As shown, the second damping assembly 192 includes a first moving member 1921 and a second elastic member 1922, along the length direction X of the fixing frame 18, the second elastic member 1922 is connected to the first moving member 1921, and the second elastic member 1922 can be deformed along the length direction X of the fixing frame 18, and during the deformation of the second elastic member 1922, the first moving member 1912 can be driven to move relative to the second elastic member 1922 along the length direction X of the fixing frame 18. Among them, the second damping assembly 192 may include two first moving members 1921, and the two first moving members 1921 are distributed along the length direction X of the fixing frame 18, the second elastic member 1922 is located between the two first moving members 1921, and is connected (abutted or fixedly connected) to the two first moving members 1921, so that when the second elastic member 1922 is deformed, the two first moving members 1921 can move closer to each other or farther away from each other. The second elastic member 1922 is in a compressed state between the two first moving members 1921.

[0211] like Fig.38 As shown, the first rotating frame 111 includes a first recessed portion 111a and a second recessed portion 111b spaced apart along the width direction Y of the fixed frame 18, wherein the distance between the first recessed portion 111a and the fixed frame 18 is smaller than the distance between the second recessed portion 111b and the fixed frame 18, that is, compared with the first recessed portion 111a, the second recessed portion 111b is closer to the fixed frame 18. Fig.38As shown, the first rotating frame 111 includes two first recessed portions 111a, and the two first recessed portions 111a are arranged on the first rotating frame 111 along the length direction X of the fixed frame 18, and the second rotating frame 111 includes two second recessed portions 111b, and the two second recessed portions 111b are arranged on the first rotating frame 111 along the length direction X of the fixed frame 18.

[0212] When the folding device 1 is in the unfolded state, Fig.36 As shown, the first rotating frame 111 and the second rotating frame 112 are in the second position, at which time the first moving member 1921 of the second damping assembly 192 cooperates with the first recessed portion 111a. When the folding device 1 is in the folded state, the first rotating frame 111 and the second rotating frame 112 are in the second position, at which time the first moving member 1921 of the second damping assembly 192 cooperates with the second recessed portion 111b. When the folding device 1 switches between the unfolded state and the folded state, the first moving member 1921 can move along the wall surface between the first recessed portion 111a and the second recessed portion 111b.

[0213] When the first moving member 1921 of the second damping assembly 192 cooperates with the first recessed portion 111a, the second elastic member 1922 has a fourth deformation amount. At this time, the second damping assembly 192 can be moved by the second elastic member 1922. A fourth damping force is applied to the first rotating frame 111, and under the action of the fourth damping force, the first rotating frame 111 can be maintained in the first position; when the second moving part 1921 of the second damping assembly 192 cooperates with the second recessed portion 111b, the second elastic member 1922 has a fifth deformation amount. At this time, the second damping assembly 192 can apply a fifth damping force to the first rotating frame 111 through the second elastic member 1922, and under the action of the fifth damping force, the first rotating frame 111 can be maintained in the second position; when the second moving part 1921 of the second damping assembly 192 moves between the first recessed portion 111a and the second recessed portion 111b, the second elastic member 1922 has a sixth deformation amount. At this time, the second damping assembly 192 can apply a sixth damping force to the first rotating frame 111 through the second elastic member 1922, and under the action of the sixth damping force, it can provide torque for the rotational movement of the first rotating frame 111. The above-mentioned sixth deformation is smaller than the fourth deformation and the fifth deformation, that is, the sixth damping force is smaller than the fourth damping force and the fifth damping force. When the structures of the first recessed portion 111a and the second recessed portion 111b are the same, the fifth deformation and the sixth deformation are the same (the fifth damping force and the sixth damping force are the same in magnitude). Of course, the two may also be different.

[0214] Specifically, Fig.37As shown, the first moving member 1921 has a first roller 1921a, and the first moving member 1921 can roll relative to the first roller 1921a, that is, the first moving member 1921 can roll between the first recessed portion 111a and the second recessed portion 111b, thereby reducing the wear between the first moving member 1921 and the first rotating frame 111.

[0215] In addition, the second damping assembly 192 is also connected to the first transmission link 141, as shown in FIG. Fig.39 As shown, the first transmission link 141 has a first installation cavity 141b, and the second damping assembly 192 is installed in the first installation cavity 141b, that is, the second damping assembly 192 is connected to the first transmission link 141. At the same time, along the length direction X of the fixed frame 18, both side walls of the first installation cavity 141b have openings, and the two first moving parts 1921 of the second damping assembly 192 can extend from the openings to cooperate with the first rotating frame 111. In the first transmission connecting rod 141, the top wall of the first installation cavity 141b is provided with a first through hole 141c, and the size of the first through hole 141c along the length direction X of the fixing frame 18 is larger than its size along the width direction Y of the fixing frame 18, that is, the first through hole 141c is an elongated hole, and the first roller 1921a of the first moving member 1921 can rotate in the first through hole 141c. During the rotation of the first roller 1921a, the first moving member 1921 can roll along the width direction Y of the fixing frame 18. At the same time, the first roller 1921a can also move along the length direction X of the fixing frame 18, and the two first moving members 1921 can move along the length direction X of the fixing frame 18 to change the deformation of the second elastic member 1922.

[0216] In the above embodiments, the first transmission link 141 is slidably connected to the first rotating frame 111, and the second transmission link 142 is slidably connected to the second rotating frame 121. Specifically, Fig.40 As shown, taking the sliding connection between the second rotating frame 112 and the second transmission link 142 as an example, the second rotating frame 112 is provided with a third track 113, and correspondingly, the second transmission link 142 is provided with a third slider 143, and the third slider 143 can slide along the third track 113. The sliding connection structure between the first transmission link 141 and the first rotating frame 111 is similar to this, and will not be repeated here.

[0217] In addition, an embodiment of the present application also provides an electronic device, which includes any one of the various implementation methods of the folding device described above, and two shells, wherein the first shell and the second shell are located on both sides of the folding device, the first shell is fixedly connected to the first rotating frame located on the same side, and the second shell is fixedly connected to the second rotating frame located on the same side, and also includes a flexible screen 2 fixedly connected to the two shells.

[0218] like Figure 2 As shown, the flexible screen 2 includes a first area 21, a second area 22, a third area 23, a fourth area 24 and a fifth area 25, wherein the first area 21 is connected to the first shell 31 (specifically, it can be adhered), and the second area 22 is connected to the second shell 32 (specifically, it can be adhered). The third area 23, the fourth area 24 and the fifth area 25 correspond to the folding device 1, that is, the above-mentioned accommodating space 174 of the above-mentioned folding device 1 is used to accommodate the third area 23, the fourth area 24 and the fifth area 25, that is, the third area 23, the fourth area 24 and the fifth area 25 form the folding part 26 of the above-mentioned flexible screen 2. Specifically, as Fig.25 As shown, the third area 23 corresponds to the first support plate 171 , the fourth area 24 corresponds to the second support plate 172 , and the fifth area 25 corresponds to the third support plate 173 .

[0219] The specific connection method between the support plate 17 and the flexible screen 2 is introduced below.

[0220] In a specific embodiment, there is no fixed connection between the third area 23 and the first support plate 171, there is no fixed connection between the fourth area 24 and the second support plate 172, and there is no fixed connection between the fifth area 25 and the third support plate 176. In this embodiment, when the electronic device is in a folded state, the third area 23, the fourth area 24 and the fifth area 25 are folded to form a water drop-shaped structure, that is, the folded portion 26 is in a water drop shape, and the fifth area 25 is in a semicircular arc shape after folding.

[0221] In another specific embodiment, the third area 23 is fixedly connected to the first support plate 171 (specifically, it can be adhered), the fourth area 24 is fixedly connected to the second support plate 172 (specifically, it can be adhered), and there is no fixed connection between the fifth area 25 and the third support plate 173. At this time, when the electronic device is in the folded state, the fifth area 25 is surrounded by a semicircular arc.

[0222] In this embodiment, when the third area 23 is fixedly connected to the first support plate 171 and the fourth area 24 is fixedly connected to the second support plate 172, when the electronic device is folded or unfolded, the third area 23 can move with the first support plate 171 and the fourth area 24 can move with the second support plate 172, that is, there is no relative movement between the third area 23 and the first support plate 171, thereby improving the flatness of the folding part 26 of the flexible screen 2 during the unfolding and folding process and reducing the risk of failure of the flexible screen 2.

[0223] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A folding device, characterized in that: The folding device comprises: Fixed frame; A rotating frame assembly, the rotating frame assembly comprising a first rotating frame and a second rotating frame arranged on both sides of the fixed frame along the width direction of the fixed frame; the first rotating frame is rotatably connected to the fixed frame via a first rotating shaft, and the first rotating shaft can move relative to the fixed frame along the width direction of the fixed frame; the second rotating frame is rotatably connected to the fixed frame via a second rotating shaft, and the second rotating shaft can move relative to the fixed frame along the width direction of the fixed frame; When the first rotating frame and the second rotating frame rotate toward each other, the first rotating shaft and the second rotating shaft move in a direction away from the fixed frame along the width direction of the fixed frame; The folding device also includes: The swing arm assembly comprises a first swing arm and a second swing arm located on both sides of the fixed frame in the width direction; the rotating frame assembly is rotatably connected to the fixed frame through the swing arm assembly, one end of the first swing arm is slidably connected to the first rotating frame and can rotate relatively, and the other end is rotatably connected to the fixed frame through the first rotating shaft; one end of the second swing arm is slidably connected to the second rotating frame and can rotate relatively, and the other end is rotatably connected to the fixed frame through the second rotating shaft; Transmission assembly, including a transmission group and a driving group; The transmission group includes a first transmission link and a second transmission link located on both sides of the fixed frame in the width direction; the first transmission link is slidably connected to the first rotating frame and is rotatably connected to the fixed frame, and the second transmission link is slidably connected to the second rotating frame and is rotatably connected to the fixed frame; The pushing group includes a first pushing member and a second pushing member, the first pushing member is rotatably connected to the second swing arm via the second rotating shaft, and the first pushing member is also rotatably connected to the first transmission connecting rod, the second pushing member is rotatably connected to the first swing arm via the first rotating shaft, and the second pushing member is also rotatably connected to the second transmission connecting rod; Wherein, the axis around which the first transmission link rotates relative to the fixing frame is different from the axis around which the first transmission link rotates relative to the first pushing member, and the axis around which the second transmission link rotates relative to the fixing frame is different from the axis around which the second transmission link rotates relative to the second pushing member; The first transmission connecting rod is used to transmit the movement of the first rotating frame to drive the first pushing member to push the second rotating shaft to move in a direction away from the fixed frame, and the second transmission connecting rod is used to transmit the movement of the second rotating frame to drive the second pushing member to push the first rotating shaft to move in a direction away from the fixed frame.

2. The folding device according to claim 1, characterized in that: The transmission assembly further includes a limit group, and the limit group includes a first limit member and a second limit member; One end of the first limiting member is rotatably connected to the fixing frame, and the other end is rotatably connected to the first swing arm and the second pushing member via the first rotating shaft; One end of the second limiter is rotatably connected to the fixing frame, and the other end is rotatably connected to the second swing arm and the first pushing member via the second rotating shaft; The first limiting member is used to limit the first pushing member to move along a first preset trajectory, and the second limiting member is used to limit the second pushing member to move along a second preset trajectory.

3. The folding device according to claim 2, characterized in that: The first preset track and the second preset track both extend along the width direction of the fixing frame and are inclined toward the thickness direction of the fixing frame; and the first preset track and the second preset track have opposite inclination directions.

4. The folding device according to claim 1, characterized in that: The transmission assembly further includes a limit group, and the limit group includes a first limit member and a second limit member; the first limit member and the second limit member are both slidably connected to the fixing frame; The first limiting member can slide relative to the fixing frame along the width direction of the fixing frame, the first limiting member and the second pushing member are rotationally connected via the first rotating shaft, and the second pushing member can move relative to the first limiting member along the thickness direction of the fixing frame; The second limiting member can slide relative to the fixing frame along the width direction of the fixing frame, the second limiting member is rotationally connected to the first pushing member via the second rotating shaft, and the first pushing member can move relative to the second limiting member along the thickness direction of the fixing frame; The first limiting member is used to limit the first pushing member to move along a third preset trajectory, and the second limiting member is used to limit the second pushing member to move along a fourth preset trajectory.

5. The folding device according to claim 4, characterized in that: The side wall of the fixing frame relative to the first limiting member and the second limiting member is provided with a sliding groove extending along the width direction of the fixing frame, and the first limiting member and the second limiting member are slidably connected to the corresponding sliding grooves respectively.

6. The folding device according to claim 4 or 5, characterized in that: The second position-limiting member is provided with a first mounting groove, and the first position-limiting member is provided with a second mounting groove, and both the first mounting groove and the second mounting groove are recessed along the thickness direction of the fixing frame; The first pushing member is movably connected to the first mounting groove, and the second pushing member is movably connected to the second mounting groove.

7. The folding device according to claim 1, characterized in that: The first rotating shaft is disposed on the first pushing member, and the second rotating shaft is disposed on the second pushing member; The side wall of the fixing frame opposite to the first rotating shaft and the second rotating shaft is provided with a sliding groove extending along the width direction of the fixing frame, and the first rotating shaft and the second rotating shaft are respectively slidably connected to the corresponding sliding groove.

8. The folding device according to any one of claims 1 to 5 and 7, characterized in that: The folding device further comprises a support plate assembly, wherein the support plate assembly comprises a first support plate and a second support plate arranged on both sides of the fixing frame along a width direction of the fixing frame; The first support plate is rotatably connected to the first rotating frame, and the first support plate is slidably connected to the first transmission connecting rod and can rotate relatively; The second support plate is rotatably connected to the second rotating frame; and the second support plate is slidably connected to the second transmission connecting rod and can rotate relatively; During the process that the first rotating frame and the second rotating frame rotate toward each other, the first transmission connecting rod drives the end of the first supporting plate close to the fixed frame to move in the direction away from the fixed frame, and the second transmission connecting rod drives the end of the second supporting plate close to the fixed frame to move in the direction away from the fixed frame, so that when the first rotating frame and the second rotating frame rotate toward each other to the first position, the first supporting plate, the fixed frame and the second supporting plate form an accommodating space.

9. The folding device according to claim 8, characterized in that: The first transmission connecting rod further comprises a first arc segment, and the second transmission connecting rod further comprises a second arc segment; When the first rotating frame and the second rotating frame rotate toward each other to the first position, the first supporting plate, the first arc segment, the fixing frame, the second arc segment and the second supporting plate enclose the accommodating space.

10. The folding device according to claim 8, characterized in that: The first support plate and the first transmission connecting rod are provided with a first track and a first slider which are slidably matched, and the second support plate and the second transmission connecting rod are provided with a second track and a second slider which are slidably matched; During the process that the first rotating frame and the second rotating frame rotate toward each other, the first slider slides from an end of the first track away from the fixed frame to an end of the first track close to the fixed frame, and the second slider slides from an end of the second track away from the fixed frame to an end of the second track close to the fixed frame.

11. The folding device according to any one of claims 1 to 5 and 7, characterized in that: The folding device further comprises a first damping assembly connected to the fixing frame, wherein the first damping assembly and the transmission assembly are arranged along the length direction of the fixing frame; The first damping assembly includes a first rotating arm, a second rotating arm, at least two first gears meshing with each other, a first elastic member, and a cam disposed between the first elastic member and the first gear, wherein the cam has a first concave-convex surface; Along the width direction of the fixed frame, one end of the first rotating arm is slidably connected to the first rotating frame and can rotate relatively, and the other end is provided with a first tooth portion, one end of the second rotating arm is slidably connected to the second rotating frame and can rotate relatively, and the other end is provided with a second tooth portion, the first tooth portion and the second tooth portion are both meshed with the first gear, and along the length direction of the fixed frame, a second concave-convex surface is provided on a side of the first gear opposite to the first concave-convex surface; The cam and the first gear are arranged along the length direction of the fixing frame, and two ends of the first elastic member are elastically abutted against the fixing frame and the cam respectively; During the rotation of the first rotating arm and the second rotating arm, the first tooth portion and the second tooth portion can rotate relative to the cam, so that the first concave-convex surface can mesh with the second concave-convex surface.

12. The folding device according to claim 11, characterized in that: The first damping assembly further includes a mounting member, the mounting member having a mounting space, and the cam and the first elastic member are located in the mounting space; The first gear is connected to a pin shaft extending along the length direction of the fixing frame, the cam and the first elastic member are sleeved on the pin shaft, and two ends of the first elastic member are elastically abutted against the mounting member and the cam respectively; The mounting member is provided with a rotation hole, the pin shaft can pass through the rotation hole and extend out of the mounting member, the first damping assembly also includes a clamping member, the portion of the pin shaft extending out of the mounting member is provided with a clamping groove, and the clamping member is clamped with the clamping groove.

13. The folding device according to any one of claims 1 to 5 and 7, characterized in that: The folding device further comprises a second damping assembly and a third damping assembly, the first transmission connecting rod has a first mounting cavity for accommodating the second damping assembly, and the second transmission connecting rod has a second mounting cavity for accommodating the second damping assembly; The second damping assembly includes a first moving member and a second elastic member, wherein the second elastic member is connected to the first moving member along the length direction of the fixed frame, and the first moving member is elastically supported to the first rotating frame by the second elastic member, and the first moving member is connected to the first transmission connecting rod by a first roller; The third damping assembly includes a second moving member and a third elastic member. Along the length direction of the fixed frame, the third elastic member is connected to the second moving member, and the second moving member is elastically supported to the second rotating frame by the third elastic member. The second moving member is connected to the second transmission connecting rod by a second roller.

14. The folding device according to claim 13, characterized in that: The first rotating frame comprises a first recessed portion and a second recessed portion which are spaced apart along the width direction of the fixed frame; the second rotating frame comprises a third recessed portion and a fourth recessed portion which are spaced apart along the width direction of the fixed frame; During the rotation of the first rotating frame, the first moving member can move along the wall surface between the first recessed portion and the second recessed portion, and the first moving member can cooperate with the first recessed portion or the second recessed portion; During the rotation of the second rotating frame, the second moving member can move along the wall surface between the third recessed portion and the fourth recessed portion, and the second moving member can cooperate with the third recessed portion or the fourth recessed portion.

15. The folding device according to claim 13, characterized in that: The first installation cavity is provided with a first through hole, the first roller can rotate in the first through hole, and the first roller can move in the first through hole along the length direction of the fixing frame; The second installation cavity is provided with a second through hole, the second roller can rotate in the second through hole, and the second roller can move in the second through hole along the length direction of the fixing frame.

16. The folding device according to any one of claims 1 to 5 and 7, characterized in that: The transmission assembly further includes a synchronous gear set, the synchronous gear set including a second gear, a third gear, a fourth gear and a fifth gear arranged along the width direction of the fixing frame, the fourth gear meshes with the second gear, the fifth gear meshes with the third gear, and the fourth gear meshes with the fifth gear; The second gear is connected to the first transmission connecting rod, and the third gear is connected to the second transmission connecting rod.

17. An electronic device, characterized in that: The electronic device comprises: a first housing, a second housing, a flexible screen, and a folding device according to any one of claims 1 to 16; The first shell and the second shell are located on two sides of the folding device, the first shell is fixedly connected to the first rotating frame located on the same side, and the second shell is fixedly connected to the second rotating frame located on the same side; The flexible screen covers the first shell, the second shell and the folding device, and is fixedly connected to the first shell and the second shell.

18. The electronic device according to claim 17, characterized in that: When the folding device includes a support plate assembly, the flexible screen is also fixedly connected to at least a portion of the support plate assembly.

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