Rotating mechanism and foldable electronic equipment

Abstract

The invention provides a rotating mechanism and foldable electronic equipment. The rotating mechanism comprises a fixed base, a first synchronous swing arm, a second synchronous swing arm and a synchronous gear. A first gear, an intermediate gear and a second gear of the synchromesh gear are all bevel gears, the first gear, the intermediate gear and the second gear are arranged side by side in parallel, and the intermediate gear is located between the first gear and the second gear and meshed with the first gear and the second gear. The first synchronous swing arm is fixedly connected with the first gear, and the second synchronous swing arm is fixedly connected with the second gear. The synchronous gear is installed in the fixed base and rotationally connected with the fixed base, the first synchronous swing arm and the second synchronous swing arm are located on the two opposite sides of the fixed base in the width direction respectively, the rotation directions of the first synchronous swing arm and the second synchronous swing arm are opposite, and the rotation directions of the first gear and the second gear are opposite. The rotating mechanism provided by the invention can solve the technical problem of poor transmission stability of a rotating mechanism in the prior art.

Description

Rotating mechanism and foldable electronic device

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on September 20, 2022, with application number 202211145993.2 and application name “Rotating mechanism and foldable electronic device”, the entire contents of which are incorporated by reference in this application.

[0002] The present application relates to the technical field of electronic products, and in particular to a rotating mechanism and a foldable electronic device.

[0003] With the development of science and technology, the appearance (ID) of electronic devices (such as mobile phones, tablet computers, etc.) has a tendency to develop from straight-screen phones to folding phones. Folding phones have a large screen in the open state, which fully satisfies the visual experience of consumers. In the closed state, they are small in size and easy to carry. Most folding phones in the prior art achieve synchronous motion through synchronous gears in the synchronous mechanism. However, most of the existing synchronous gears are straight-tooth structures with poor transmission stability.

[0004]

[0005] The present application provides a rotating mechanism and a foldable electronic device to solve the technical problem of poor transmission smoothness of the rotating mechanism in the prior art.

[0006] In the first aspect, the present application provides a rotating mechanism, comprising a fixed base, a first synchronous swing arm, a second synchronous swing arm and a synchronous gear. The synchronous gear comprises a first gear, a second gear and an intermediate gear. The first gear, the intermediate gear and the second gear are all helical gears. The first gear, the intermediate gear and the second gear are arranged side by side and in parallel, and the intermediate gear is located between the first gear and the second gear and meshes with the first gear and the second gear. The first synchronous swing arm is fixedly connected to the first gear, and the second synchronous swing arm is fixedly connected to the second gear. The synchronous gear is installed in the fixed base and is rotatably connected to the fixed base. The first synchronous swing arm and the second synchronous swing arm are respectively located on opposite sides of the fixed base in the width direction. The first synchronous swing arm and the second synchronous swing arm have opposite rotation directions, and the first gear and the second gear have opposite rotation directions.

[0007] The rotating mechanism is applied to a foldable electronic device, which includes a first shell, a second shell and a display screen. The first shell is connected to a first synchronous swing arm, and the second shell is connected to a second synchronous swing arm. The rotating mechanism is located between the first shell and the second shell, and the first shell and the second shell are rotatably connected. The rotation of the rotating mechanism can drive the first shell and the second shell to rotate relative to each other. The first shell and the second shell are also provided with a receiving groove, which is used to accommodate electronic components and structural components such as a processor, a circuit board, and a camera module of the electronic device.

[0008] When the rotating mechanism is in a folded state, the first synchronous swing arm and the second synchronous swing arm are relatively folded. That is, the first synchronous swing arm and the second synchronous swing arm rotate toward each other so that the first synchronous swing arm and the second synchronous swing arm are stacked. When the rotating mechanism is in a flattened state, the first synchronous swing arm and the second synchronous swing arm are flattened relative to the fixed base, and the angle between the first synchronous swing arm and the second synchronous swing arm is close to 180 degrees.

[0009] In this embodiment, by setting the first gear, the middle gear and the second gear as helical gears, the overlap between the middle gear and the first gear and the second gear is increased, thereby increasing the stability of the synchronous gear transmission and improving the stability of the rotation of the rotating mechanism. In addition, by setting the first gear, the middle gear and the second gear as helical gears, it is also possible to prevent the tooth roots from breaking, improve the impact resistance and bearing capacity of the rotating mechanism, and improve the durability of the rotating mechanism. At the same time, after the overlap of the synchronous gears is increased, under the condition of satisfying continuous transmission, the gear module can be appropriately increased according to the actual application scenario, and the number of teeth of the gear can be reduced, so that the diameter of the gear can be reduced, and the thickness of the rotating mechanism in the folded state can be reduced, so as to achieve the lightness and thinness of the foldable electronic device. In addition, by setting the first gear, the middle gear and the second gear side by side and in parallel, the thickness of the rotating mechanism can be reduced, so that the lightness and thinness of the foldable electronic device can be further achieved.

[0010] In a possible embodiment, the rotating mechanism includes a folded state and a flattened state. When the rotating mechanism is in the flattened state, the first synchronous swing arm is unfolded relative to the second synchronous swing arm. When the first synchronous swing arm rotates toward the direction close to the fixed base, it drives the first gear to rotate, thereby driving the second gear to rotate, thereby driving the second synchronous swing arm to rotate toward the direction close to the first synchronous swing arm, so that the first synchronous swing arm is folded relative to the second synchronous swing arm, and the rotating mechanism is in the folded state.

[0011] In this embodiment, the first synchronous swing arm and the second synchronous swing arm achieve synchronous rotation through synchronous gears, thereby achieving synchronous rotation of the rotating mechanism, thereby improving the convenience and reliability of the rotation of the rotating mechanism and enhancing the user experience.

[0012] In a possible implementation manner, a degree of overlap between the intermediate gear and the first gear is greater than 1.2, and a degree of overlap between the intermediate gear and the second gear is greater than 1.2.

[0013] It should be noted that the overlap is equal to the sum of the end overlap and the longitudinal overlap. In this embodiment, by setting the overlap between the intermediate gear and the first gear to be greater than 1.2, and the overlap between the intermediate gear and the second gear to be greater than 1.2, the transmission stability of the synchronous gear can be increased, and the rotation stability of the rotating mechanism can be improved.

[0014] In a possible implementation manner, the intermediate gear includes a third gear and a fourth gear, the third gear and the fourth gear are both bevel gears, the third gear and the fourth gear are both arranged between the first gear and the second gear, and the third gear is meshed with the first gear, and the fourth gear is meshed with the second gear and the third gear.

[0015] In this embodiment, a third gear and a fourth gear are arranged between the first gear and the second gear, and when the first gear rotates, the third gear is driven to rotate, thereby driving the fourth gear to rotate, and then driving the second gear to rotate, thereby achieving synchronous rotation of the first gear and the second gear, thereby improving the stability of the synchronous gear transmission and the stability of the rotation of the rotating mechanism.

[0016] In a possible implementation manner, the overlap between the third gear and the fourth gear is greater than 1.2. In this embodiment, by setting the overlap between the third gear and the fourth gear to be greater than 1.2, the transmission stability of the synchronous gear can be further increased, thereby improving the rotation stability of the rotating mechanism.

[0017] In a possible implementation manner, the first gear includes a first tooth, the second gear includes a second tooth, the third gear includes a third tooth, and the fourth gear includes a fourth tooth. The first tooth, the second tooth, the third tooth, and the fourth tooth are all spiral, and the spiral directions of the first tooth and the second tooth are opposite, and the spiral directions of the third gear and the fourth gear are opposite.

[0018] In this embodiment, by setting the first tooth, the second tooth, the third tooth and the fourth tooth to be spiral type, the overlap between the intermediate gear and the first gear and the second gear can be improved, thereby increasing the transmission stability of the synchronous gear, improving the rotation stability of the rotating mechanism, and preventing the tooth root from breaking, thereby improving the impact resistance and load-bearing capacity of the rotating mechanism and improving the durability of the rotating mechanism.

[0019] In a possible implementation manner, the helix angles of the first tooth, the second tooth, the third tooth, and the fourth tooth are all between 15° and 45°.

[0020] In this embodiment, by setting the helical angles of the first tooth, the second tooth, the third tooth and the fourth tooth to 15° to 45°, the overlap between two adjacent gears can be improved, thereby increasing the transmission stability of the synchronous gear and improving the rotation stability of the rotating mechanism.

[0021] In a possible implementation manner, the first gear includes a first tooth, the second gear includes a second tooth, the third gear includes a third tooth, and the fourth gear includes a fourth tooth; the first tooth, the second tooth, the third tooth and the fourth tooth are all "V"-shaped.

[0022] In this embodiment, by setting the first tooth, the second tooth, the third tooth and the fourth tooth to be "V"-shaped, the axial force when the synchronous gear rotates can be reduced, thereby further increasing the stability of the synchronous gear rotation and improving the stability of the rotation of the rotating mechanism.

[0023] In a possible implementation manner, the first tooth includes a first sub-tooth and a second sub-tooth, the first sub-tooth and the second sub-tooth are both helical teeth, and the first sub-tooth is fixedly connected to the second sub-tooth along the axial direction of the first gear. The second tooth includes a third sub-tooth and a fourth sub-tooth, the third sub-tooth and the fourth sub-tooth are both helical teeth, and the third sub-tooth is fixedly connected to the fourth sub-tooth along the axial direction of the second gear. The third tooth includes a fifth sub-tooth and a sixth sub-tooth, the fifth sub-tooth and the sixth sub-tooth are both helical teeth, and the fifth sub-tooth is fixedly connected to the sixth sub-tooth along the axial direction of the third gear. The fourth tooth includes a seventh sub-tooth and an eighth sub-tooth, the seventh sub-tooth and the eighth sub-tooth are both helical teeth, and the seventh sub-tooth is fixedly connected to the eighth sub-tooth along the axial direction of the fourth gear.

[0024] The first sub-tooth meshes with the fifth sub-tooth, the fifth sub-tooth meshes with the seventh sub-tooth, the seventh sub-tooth meshes with the third sub-tooth, the second sub-tooth meshes with the seventh sub-tooth, the sixth sub-tooth meshes with the eighth sub-tooth, and the eighth sub-tooth meshes with the fourth sub-tooth.

[0025] In this embodiment, by setting the teeth of each gear to two sub-teeth, and the two adjacent gears are meshed with each other through the two sub-teeth, the directions of the axial components of the forces received by the two sub-teeth of the same gear are opposite, so that they can offset each other, thereby reducing the axial force of each gear, and further increasing the stability of the rotation of the synchronous gear, thereby improving the stability of the rotation of the rotating mechanism.

[0026] In one possible implementation manner, the spiral directions of the first sub-tooth and the fifth sub-tooth are opposite, the spiral directions of the fifth sub-tooth and the seventh sub-tooth are opposite, the spiral directions of the seventh sub-tooth and the third sub-tooth are opposite, and the spiral angles of the first sub-tooth, the fifth sub-tooth, the seventh sub-tooth and the third sub-tooth are all 15° to 45°.

[0027] In this embodiment, by setting the first sub-tooth, the fifth sub-tooth, the seventh sub-tooth and the third sub-tooth to be spiral type, and the spiral angles are all 15° to 45°, the overlap between the first gear and the third gear, the overlap between the third gear and the fourth gear, and the overlap between the fourth gear and the second gear can be improved, thereby increasing the transmission stability of the synchronous gear and improving the rotation stability of the rotating mechanism.

[0028] In a possible implementation manner, a degree of overlap between the first gear and the third gear is greater than 1.2, a degree of overlap between the third gear and the fourth gear is greater than 1.2, and a degree of overlap between the fourth gear and the second gear is greater than 1.2.

[0029] In this embodiment, by setting the overlap between the first gear and the third gear to be greater than 1.2, the overlap between the third gear and the fourth gear to be greater than 1.2, and the overlap between the fourth gear and the second gear to be greater than 1.2, the transmission stability of the synchronous gear can be further increased and the rotation stability of the rotating mechanism can be improved.

[0030] In a possible implementation manner, the rotating mechanism further includes a damping member, the damping member includes a damping spring, a first hinge seat and a second hinge seat, the damping member is mounted on the fixed base, and the first hinge seat and the second hinge seat are both fixedly connected to the damping spring. The first synchronous swing arm includes a first hinge body, the first hinge body is hinged to the first hinge seat, and the second synchronous swing arm includes a second hinge body, the second hinge body is hinged to the second hinge seat.

[0031] When the first synchronous swing arm rotates relative to the fixed base, the first hinge body abuts against the first hinge seat, and when the second synchronous swing arm rotates relative to the fixed base, the second hinge body abuts against the second hinge seat. The first hinge seat and the second hinge seat jointly compress the damping spring and cause the damping spring to generate elastic force.

[0032] In this embodiment, a damping member is provided, and a first hinge is provided on the first synchronous swing arm, and a second hinge is provided on the second synchronous swing arm, so that when the first synchronous swing arm and the second synchronous swing arm rotate, the damping spring is repeatedly squeezed to generate an elastic force, and the elastic restoring force generated by the elastic force in turn acts on the first synchronous swing arm and the second synchronous swing arm, thereby providing a damping force for the rotation of the first synchronous swing arm and the second synchronous swing arm, so as to enhance the damping feel when the user uses it and improve the user's experience.

[0033] In a possible embodiment, the rotating mechanism includes a first fixed plate and a second fixed plate, the first fixed plate and the second fixed plate are respectively located on opposite sides of the width direction of the fixed base, and the first synchronous swing arm is slidably connected to the first fixed plate, and the second fixed plate is slidably connected to the second synchronous swing arm.

[0034] The first housing is fixedly connected to the first fixing plate, and the second housing is fixedly connected to the second fixing plate. In this embodiment, by providing the first fixing plate and the second fixing plate, when the first housing and the second housing rotate relative to each other, the first fixing plate drives the first synchronous swing arm to rotate, and the second fixing plate drives the second synchronous swing arm to rotate, thereby improving the rotation stability of the first synchronous swing arm and the second synchronous swing arm, and further improving the rotation stability of the rotating mechanism and the foldable electronic device.

[0035] In a possible implementation manner, the fixed base is provided with a first rotation groove and a second rotation groove, and the first rotation groove and the second rotation groove are arranged opposite to each other. The rotation mechanism includes a first main swing arm and a second main swing arm, the first main swing arm is installed in the first rotation groove, and can slide and rotate along the first rotation groove, and the first main swing arm is rotationally connected to the first fixed plate. The second main swing arm is installed in the second rotation groove, and can slide and rotate along the second rotation groove, and the second main swing arm is rotationally connected to the second fixed plate.

[0036] In this embodiment, by setting the first main swing arm and the second main swing arm, when the first fixed plate rotates relative to the fixed base, the first main swing arm rotates and slides in the first rotation groove, and when the second fixed plate rotates relative to the fixed base, the second main swing arm rotates and slides in the second rotation groove, thereby realizing the rotation of the first fixed plate and the second fixed plate relative to the fixed base.

[0037] In a possible implementation manner, the first main swing arm includes a first rotating body and a first swinging body, the first rotating body is fixedly connected to the first swinging body, the first rotating body includes a first sliding part and two second sliding parts, and the two second sliding parts are connected to opposite sides of the first sliding part. The first rotating groove includes a first slide rail and two second slide rails, the two second slide rails are respectively located on opposite sides of the first slide rail, and are arranged side by side with the first slide rail along the length direction of the fixed base. The first rotating body is installed in the first rotating groove, the first sliding part is installed on the first slide rail, and one second sliding part is installed on one second slide rail.

[0038] In this embodiment, by arranging the first slide rail and the two second slide rails in the first rotation groove, and the sliding track of the first main swing arm is defined by the first slide rail and the two second slide rails, the precision requirement for the first rotation groove can be reduced, the processing cost can be reduced, and the stability of the rotation of the first main swing arm can be improved. In addition, the first slide rail and the two second slide rails are arranged in a distributed manner, which reduces the processing difficulty of the fixed base.

[0039] In a possible implementation, a second slide rail includes a slide rail bottom wall and a protrusion, wherein the protrusion is connected to the side wall of the first rotation groove and is arranged opposite to the slide rail bottom wall at an interval, and the bottom wall of the first rotation groove is further provided with a first hollow portion, which passes through the bottom wall of the first rotation groove and is arranged opposite to the protrusion. The second sliding portion is located between the slide rail bottom wall and the protrusion.

[0040] In this embodiment, by providing the first hollow portion, the fixed base can be prepared by mold forming, which simplifies the processing technology of the fixed base and avoids the problem of undercut. In addition, in this embodiment, by providing a protrusion on the side wall of the first rotation groove, the first main swing arm can be limited, which can prevent the first main swing arm from leaving the first rotation groove during the rotation process, thereby improving the stability of the rotation of the first main swing arm.

[0041] In a possible implementation manner, the fixed base is further provided with a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged opposite and parallel to each other and are rotatably connected to the fixed base, and the extension directions of the first rotating shaft and the second rotating shaft are both parallel to the length direction of the fixed base. The rotating mechanism includes a first auxiliary swing arm and a second auxiliary swing arm, the first auxiliary swing arm is fixedly connected to the first rotating shaft and is slidably connected to the first fixed plate; the second auxiliary swing arm is fixedly connected to the second rotating shaft and is slidably connected to the second fixed plate.

[0042] In this embodiment, by setting a first auxiliary swing arm, when the first fixed plate rotates relative to the fixed base, the first auxiliary swing arm is driven to rotate together with the first main swing arm, so as to realize the rotation of the first fixed plate relative to the fixed base, thereby increasing the rotation stability of the first fixed plate; by setting a second auxiliary swing arm, when the second fixed plate rotates relative to the fixed base, the second auxiliary swing arm is driven to rotate together with the second main swing arm, so as to realize the rotation of the second fixed plate relative to the fixed base, thereby increasing the rotation stability of the second fixed plate.

[0043] In a possible implementation, the rotation mechanism also includes a floating plate, which is mounted on the fixed base and is rotationally connected to the first rotating shaft and the second rotating shaft; when the first auxiliary swing arm rotates relative to the fixed base, it drives the first rotating shaft to rotate, and when the second auxiliary swing arm rotates relative to the fixed base, it drives the second rotating shaft to rotate. The first rotating shaft and the second rotating shaft rotate to drive the floating plate to move along the thickness direction of the fixed base.

[0044] The floating plate is arranged at the FPC wire position of the rotating mechanism. In this embodiment, by providing the floating plate, the FPC wire can be protected to prevent the display screen from squeezing the FPC wire when the rotating mechanism is in the folded state, thereby causing damage to the FPC wire. In addition, when the rotating mechanism is in the flattened state, the floating plate supports the display screen, and when the rotating mechanism is in the folded state, the floating plate sinks to avoid the display screen and avoid squeezing the display screen.

[0045] In a possible implementation, the first rotating shaft includes a first fixed portion and a first extending portion, the axis of the first fixed portion is parallel to the axis of the first extending portion and is spaced apart; the second rotating shaft includes a second fixed portion and a second extending portion, the axis of the second fixed portion is parallel to the axis of the second extending portion and is spaced apart; the floating plate is provided with a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove are spaced apart. The first extending portion is located in the first mounting groove, and the second extending portion is located in the second mounting groove.

[0046] When the first auxiliary swing arm and the second auxiliary swing arm rotate in directions approaching each other, the first extension part and the second extension part drive the floating plate to move toward the fixed base; when the first auxiliary swing arm and the second auxiliary swing arm rotate in directions away from each other, the first extension part and the second extension part drive the floating plate to move in a direction away from the fixed base.

[0047] In this embodiment, the first auxiliary swing arm and the second auxiliary swing arm are rotated to drive the first rotating shaft and the second rotating shaft to rotate, thereby driving the floating plate to move, so that when the rotating mechanism is in a flattened state, the floating plate moves toward the display screen to support the display screen; when the rotating mechanism is in a folded state, the floating plate sinks to avoid the display screen to prevent squeezing the display screen.

[0048] In a possible implementation, the rotating mechanism further includes a first pressure plate and a second pressure plate, wherein the first pressure plate is slidably connected to the first fixed plate, and when the first fixed plate rotates relative to the fixed base, the first pressure plate can be driven to rotate relative to the fixed base; the second pressure plate is slidably connected to the second fixed plate, and when the second pressure plate rotates relative to the fixed base, the second pressure plate can be driven to rotate relative to the fixed base.

[0049] In this embodiment, by providing the first pressing plate and the second pressing plate, when the rotating mechanism is in a flattened state, the first pressing plate and the second pressing plate jointly support the display screen, thereby increasing the stability of the display screen connection to ensure good display of the display screen.

[0050] In a possible implementation manner, the fixed base is further provided with a third rotation groove and a fourth rotation groove, and the third rotation groove is arranged opposite to the fourth rotation groove; the rotation mechanism further includes a first pressure plate swing arm and a second pressure plate swing arm, the first pressure plate swing arm is installed in the third rotation groove, and can slide and rotate along the third rotation groove, and the first pressure plate swing arm is slidably connected to the first pressure plate. The second pressure plate swing arm is installed in the fourth rotation groove, and can slide and rotate along the fourth rotation groove, and the second pressure plate swing arm is slidably connected to the second pressure plate.

[0051] In this embodiment, by providing a first pressure plate swing arm and driving the first pressure plate swing arm to rotate through the first pressure plate, the first pressure plate can be rotated relative to the fixed base, thereby improving the rotation stability of the first pressure plate; by providing a second pressure plate swing arm and driving the second pressure plate swing arm to rotate through the second pressure plate, the second pressure plate can be rotated relative to the fixed base, thereby improving the rotation stability of the second pressure plate.

[0052] In a possible implementation, the fixed base further includes a flexible support member, which is installed on the fixed base. When the rotating mechanism is in a folded state, the flexible support member bends to form an escape space; when the rotating mechanism is in an unfolded state, the flexible support member unfolds.

[0053] In this embodiment, a flexible support member is provided, and when the rotating mechanism is in a flattened state, the flexible support member, the first pressure plate and the second pressure plate jointly support the display screen to ensure a good display of the display screen; when the rotating mechanism is in a folded state, the foldable portion of the display screen is bent and bulges outward toward the flexible support member, the flexible support member is bent to form a water drop-shaped structure, and the middle part of the flexible support member sinks toward the fixed base to form an avoidance space to avoid the display screen, thereby preventing the flexible support member 70 from squeezing the display screen and causing damage to the display screen.

[0054] The present application also provides a foldable electronic device, comprising a first shell, a second shell, a display screen and the above-mentioned rotating mechanism, wherein the rotating mechanism is connected between the first shell and the second shell, and the display screen is installed on the first shell, the second shell and the rotating mechanism. When the rotating mechanism rotates, the first shell and the second shell rotate relative to each other, thereby driving the display screen to bend or unfold.

[0055] In this embodiment, by providing a rotating mechanism in which the synchronous gear is a helical gear in the foldable electronic device, the rotation stability of the foldable electronic device can be improved, thereby improving the user experience.

[0056] In summary, the present application increases the overlap between the intermediate gear and the first gear and the second gear by setting the first gear, the intermediate gear and the second gear as helical gears, thereby increasing the stability of the synchronous gear transmission and improving the stability of the rotation of the rotating mechanism. In addition, by setting the first gear, the intermediate gear and the second gear as helical gears, it is also possible to prevent the tooth roots from breaking, improve the impact resistance and load-bearing capacity of the rotating mechanism, and improve the durability of the rotating mechanism. At the same time, after the overlap of the synchronous gears is increased, under the condition of satisfying continuous transmission, the gear module can be appropriately increased according to the actual application scenario, and the number of teeth of the gear can be reduced, so that the diameter of the gear can be reduced, and the thickness of the rotating mechanism in the folded state can be reduced, so as to achieve the thinness of the foldable electronic device.

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0058] FIG1 is a schematic structural diagram of a foldable electronic device in a first state provided by an embodiment of the present application;

[0059] FIG2 is a schematic structural diagram of a foldable electronic device in a second state provided by an embodiment of the present application;

[0060] FIG3 is a schematic structural diagram of a foldable electronic device in a third state provided by an embodiment of the present application;

[0061] FIG4 is a schematic diagram of the exploded structure of the foldable electronic device shown in FIG3 ;

[0062] FIG5 is a schematic structural diagram of a rotating mechanism in the foldable electronic device shown in FIG4 ;

[0063] FIG6 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG5 ;

[0064] FIG7 is a schematic diagram of the exploded structure of the fixed base in the rotating mechanism of FIG6;

[0065] FIG8 is a partially enlarged structural schematic diagram of the fixed base shown in FIG7;

[0066] FIG9 is an enlarged structural schematic diagram of a fixed plate in the first rotating assembly of the rotating mechanism shown in FIG6 ;

[0067] 10 is a schematic structural diagram of a main swing arm of the first rotating assembly in the rotating mechanism shown in FIG6 ;

[0068] FIG11 is an enlarged structural schematic diagram of the auxiliary swing arm of the first rotating assembly 1 in the rotating mechanism shown in FIG6 ;

[0069] FIG12 is a schematic diagram of a portion of the structure of the rotating mechanism in FIG5 in a flattened state;

[0070] FIG13 is a schematic diagram of a partial structure of the rotating mechanism shown in FIG12 in a folded state;

[0071] 14 is a schematic structural diagram of the first synchronization assembly in the rotating mechanism shown in FIG6;

[0072] FIG15 is a partially enlarged schematic structural diagram of the first synchronization component shown in FIG14;

[0073] FIG16 is a schematic diagram of a partial structure of the first synchronization component shown in FIG14 in another embodiment;

[0074] FIG17 is a schematic diagram of a partial structure of the first synchronization component shown in FIG14;

[0075] FIG18 is a schematic diagram of a portion of the structure of the rotating mechanism shown in FIG5 in a flattened state;

[0076] FIG19 is a schematic diagram of a portion of the structure of the rotating mechanism shown in FIG5 in a folded state;

[0077] FIG20 is a schematic diagram of a partially exploded structure of the pressure plate assembly in the rotating mechanism shown in FIG6;

[0078] FIG21 is a schematic diagram of the exploded structure of the pressing plate assembly shown in FIG20 at another angle;

[0079] FIG22 is a cross-sectional view of the rotating mechanism shown in FIG5 in a folded state;

[0080] FIG23 is an enlarged structural schematic diagram of the floating plate in the rotating mechanism shown in FIG6;

[0081] FIG24 is a schematic diagram of a partial structure of the rotating mechanism shown in FIG5;

[0082] FIG25 is a schematic cross-sectional view of the rotating mechanism shown in FIG5 in a flattened state;

[0083] FIG. 26 is a schematic structural diagram of the rotating mechanism shown in FIG. 5 in a folded state.

[0084] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0085] With the development of science and technology, the appearance (ID) of electronic devices (such as mobile phones, tablet computers, etc.) has a trend of developing from straight-screen machines to folding machines. The folding machine has a large screen in the open state, which fully satisfies the visual experience of consumers. In the closed state, it is small in size and easy to carry. Most folding machines in the prior art achieve synchronous movement through the synchronous gear 513 in the synchronization mechanism. However, most of the existing synchronous gears 513 are spur gear structures with poor transmission stability. The rotating mechanism 100 provided in the present application uses helical gears instead of spur gears, which can improve the rotation stability of the rotating mechanism 100, thereby improving the user experience.

[0086] Please refer to Figures 1 to 3. Figure 1 is a structural schematic diagram of the foldable electronic device 500 provided in an embodiment of the present application in a first state, Figure 2 is a structural schematic diagram of the foldable electronic device 500 provided in an embodiment of the present application in a second state, and Figure 3 is a structural schematic diagram of the foldable electronic device 500 provided in an embodiment of the present application in a third state.

[0087] For ease of description, the width direction of the foldable electronic device 500 is defined as the X direction, the length direction of the foldable electronic device 500 is defined as the Y direction, and the thickness direction of the foldable electronic device 500 is defined as the Z direction. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0088] The foldable electronic device 500 includes, but is not limited to, a cell phone, a notebook computer, a tablet personal computer, a laptop computer, a personal digital assistant, a wearable device, or a mobile device, etc. In the embodiment of the present application, the foldable electronic device 500 is taken as a cell phone for example.

[0089] The foldable electronic device 500 shown in Fig. 1 is in a folded state, the foldable electronic device 500 shown in Fig. 2 is in a semi-expanded state, and the foldable electronic device 500 shown in Fig. 3 is in a flattened state. The unfolding angle α of the foldable electronic device 500 shown in Fig. 2 is 90 degrees, and the unfolding angle β of the foldable electronic device 500 shown in Fig. 3 is 180 degrees.

[0090] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have slight deviations. For example, the unfolding angle α of the foldable electronic device 500 shown in Figure 2 is 90 degrees, which means that α can be 90 degrees, or approximately 90 degrees, such as 80 degrees, 85 degrees, 95 degrees or 100 degrees. The unfolding angle β of the foldable electronic device 500 shown in Figure 3 is 180 degrees, which means that β can be 180 degrees, or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees and 190 degrees. The angles illustrated in the following text can be understood in the same way.

[0091] The foldable electronic device 500 shown in the embodiment of the present application is an electronic device that can be folded once. In some other embodiments, the foldable electronic device 500 can also be an electronic device that can be folded multiple times (more than twice). In this case, the foldable electronic device 500 can include multiple parts, two adjacent parts can be folded relatively close to each other until the foldable electronic device 500 is in a folded state, and two adjacent parts can be unfolded relatively far away until the foldable electronic device 500 is in a flattened state.

[0092] Please refer to FIG. 4 , which is a schematic diagram of the exploded structure of the foldable electronic device 500 shown in FIG. 3 .

[0093] The foldable electronic device 500 includes a folding device 200 and a display screen 300, and the display screen 300 is installed on the folding device 200. The display screen 300 includes a display surface 340 and a mounting surface 350, and the display surface 340 and the mounting surface 350 are arranged opposite to each other. The display surface 340 is used to display text, images, videos, etc. The display screen 300 includes a first part 310, a second part 320 and a foldable part 330. The foldable part 330 is located between the first part 310 and the second part 320, and the foldable part 330 can be bent along the Y direction. The first part 310, the second part 320 and the foldable part 330 together constitute the display screen 300. In this embodiment, the display screen 300 adopts a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, and a quantum dot light emitting diode (QLED) display screen.

[0094] The folding device 200 includes a first housing 210, a second housing 220 and a rotating mechanism 100. The first housing 210 is provided with a first receiving groove 230, and the second housing 220 is provided with a second receiving groove 240. The first receiving groove 230 and the second receiving groove 240 are connected to form a receiving groove of the rotating mechanism 100. The rotating mechanism 100 is installed in the receiving groove and fixedly connected with the first housing 210 and the second housing 220 to realize the rotating connection between the first housing 210 and the second housing 220. The display screen 300 is installed in the folding device 200, and the mounting surface 350 is fixedly connected with the folding device 200. Specifically, the first housing 210 carries the first part 310 of the display screen 300, and the second housing 220 carries the second part 320. In other words, the first part 310 is installed in the first housing 210, and the second part 320 is installed in the second housing 220. Among them, the rotating mechanism 100 is arranged opposite to the foldable part 330. The first shell 210 and the second shell 220 can rotate relative to each other through the rotating mechanism 100, so that the folding device 200 can switch between the folded state and the flattened state.

[0095] 1 , the first housing 210 and the second housing 220 rotate relative to each other through the rotating mechanism 100, and the first housing 210 and the second housing 220 are relatively close to each other to drive the display screen 300 to fold, so that the foldable electronic device 500 is folded. When the foldable electronic device 500 is in the folded state, the foldable portion 330 of the display screen 300 is bent, and the first portion 310 and the second portion 320 are arranged relative to each other. At this time, the display screen 300 is between the first housing 210 and the second housing 220, which can greatly reduce the probability of the display screen 300 being damaged, and achieve effective protection of the display screen 300.

[0096] Please refer to FIG. 2 and FIG. 4 together. The first shell 210 and the second shell 220 rotate relative to each other through the rotating mechanism 100. The first shell 210 and the second shell 220 move away from each other to drive the display screen 300 to unfold, so that the foldable electronic device 500 is unfolded to a semi-expanded state. When the foldable electronic device 500 is in the semi-expanded state, the first shell 210 and the second shell 220 unfold to an angle of α, the first part 310 and the second part 320 unfold relative to each other, and drive the foldable part 330 to unfold. At this time, the angle between the first part 310 and the second part 320 is α. In this embodiment, α is 90 degrees. In other embodiments, α may also be approximately 90 degrees, or 80 degrees, 85 degrees, 95 degrees, or 100 degrees.

[0097] Please refer to FIG. 3 and FIG. 4 together. The first shell 210 and the second shell 220 rotate relative to each other through the rotating mechanism 100. The first shell 210 and the second shell 220 move away from each other to drive the display screen 300 to further unfold until the foldable electronic device 500 is flattened. When the folding device 200 is in the flattened state, the angle between the first shell 210 and the second shell 220 is β. The foldable part 330 unfolds, and the first part 310 and the second part 320 unfold relative to each other. At this time, the angles between the first part 310, the second part 320 and the foldable part 330 are all β, and the display screen 300 has a large display area, realizing a large screen display of the foldable electronic device 500 and improving the user experience. In this embodiment, β is 180 degrees. In other embodiments, β can also be approximately 180 degrees, and can be 170 degrees, 175 degrees, 185 degrees, 190 degrees, etc.

[0098] It should be noted that the angle α and the angle β are both the angles between the first shell 210 and the second shell 220, which are only used to distinguish the different angles between the first shell 210 and the second shell 220 in different states of the foldable electronic device 500. The angle α refers to the angle between the first shell 210 and the second shell 220 when the foldable electronic device 500 is in a semi-expanded state; the angle β refers to the angle between the first shell 210 and the second shell 220 when the foldable electronic device 500 is in a flattened state.

[0099] Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a schematic structural diagram of the rotating mechanism 100 in the foldable electronic device 500 shown in FIG. 4 , and FIG. 6 is a schematic exploded structural diagram of the rotating mechanism 100 shown in FIG. 5 .

[0100] The rotating mechanism 100 includes a fixed base 10, a rotating assembly 1, a synchronous assembly 2, a pressure plate assembly 3, a floating plate 80 and a flexible support member 70. The floating plate 80 is mounted on the fixed base 10, and the floating plate 80 can move in the Z direction relative to the fixed base 10. The flexible support member 70 is mounted on the pressure plate assembly 3, and when the rotating mechanism 100 rotates from the flat state to the folded state, the flexible support member 70 can be bent to avoid the display screen 300. The pressure plate assembly 3 is slidably and rotatably connected to the rotating assembly 1. The rotating assembly 1 is mounted on the fixed base 10, and can rotate relative to the fixed base 10, so that the fixed base 10 is rotatably connected to the rotating assembly 1. The synchronous assembly 2 is mounted on the fixed base 10 and is slidably connected to the rotating assembly 1. When the rotating assembly 1 rotates relative to the fixed base 10, it drives the pressure plate assembly 3 and the synchronous assembly 2 to rotate relative to the fixed base 10, thereby realizing the rotation of the rotating mechanism 100, and enabling the rotating mechanism 100 to switch between the folded and flattened states.

[0101] For ease of description, the present application sets a symmetry axis O (as shown in FIG5 ), wherein the symmetry axis O is perpendicular to the X direction and passes through the center of the rotating mechanism 100 , and the rotating mechanism 100 is axially symmetrical about the symmetry axis O.

[0102] In this embodiment, there are four rotating components 1, and the four rotating components 1 are respectively a first rotating component 101, a second rotating component 102, a third rotating component 103 and a fourth rotating component 104. The first rotating component 101, the second rotating component 102, the third rotating component 103 and the fourth rotating component 104 are arranged in sequence along the Y direction. Among them, the first rotating component 101 is located on the negative side of the Y axis of the fixed base 10, and the fourth rotating component 104 is located on the positive side of the Y axis of the fixed base 10. In other embodiments, the rotating components 1 can also be one, two, three or more than four. This application does not specifically limit the number of rotating components 1.

[0103] The first rotating assembly 101 includes a fixed plate 20, a main swing arm 30 and an auxiliary swing arm 40. The fixed plate 20 includes a first fixed plate 21 and a second fixed plate 22, the main swing arm 30 includes a first main swing arm 31 and a second main swing arm 32, and the auxiliary swing arm 40 includes a first auxiliary swing arm 41 and a second auxiliary swing arm 42. The main swing arm 30 and the auxiliary swing arm 40 are both mounted on the fixed base 10 and can rotate relative to the fixed base 10. Among them, the first fixed plate 21, the first main swing arm 31 and the first auxiliary swing arm 41 are located on one side of the fixed base 10 in the X direction, and the second fixed plate 22, the second main swing arm 32 and the second auxiliary swing arm 42 are located on the other side of the fixed base 10 in the X direction. The first main swing arm 31 is rotatably connected to the first fixed plate 21, and the first auxiliary swing arm 41 is slidably connected to the first fixed plate 21. When the first fixed plate 21 rotates relative to the fixed base 10, it drives the first main swing arm 31 and the first auxiliary swing arm 41 to rotate relative to the fixed base 10. The second main swing arm 32 is rotatably connected to the second fixing plate 22, and the second auxiliary swing arm 42 is slidably connected to the second fixing plate 22. When the second fixing plate 22 rotates relative to the fixing base 10, the second main swing arm 32 and the second auxiliary swing arm 42 are driven to rotate relative to the fixing base 10.

[0104] The second rotating assembly 102 and the first rotating assembly 101 may be the same or similar components, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the second rotating assembly 102 includes a first fixed plate 21A, a second fixed plate 22A, a first auxiliary swing arm 41A and a second auxiliary swing arm 42A. The basic structure of each component in the second rotating assembly 102, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can all refer to the relevant design of the first rotating assembly 101. The second rotating assembly 102 and the first rotating assembly 101 may be the same or different in the detailed structure or position arrangement of the components. In some other embodiments, the second rotating assembly 102 may also include a first main swing arm and a second main swing arm. The first main swing arm in the second rotating assembly 102 may have the same or similar structure as the first main swing arm 31 in the first rotating assembly 101, and the second main swing arm in the second rotating assembly 102 may have the same or similar structure as the second main swing arm 32 in the first rotating assembly 101. This application does not make specific restrictions on this.

[0105] The third rotating assembly 103 and the second rotating assembly 102 may be the same or similar assemblies, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the structure of the third rotating assembly 103 is the same as that of the second rotating assembly 102. The third rotating assembly 103 includes a first fixed plate 21B, a second fixed plate 22B, a first main swing arm 31B, and a second main swing arm 32B. When the first fixed plate 21B rotates relative to the fixed base 10, the first main swing arm 31B is driven to slide and rotate relative to the fixed base 10. When the second fixed plate 22B rotates relative to the fixed base 10, the second main swing arm 32B is driven to slide and rotate relative to the fixed base 10. Specifically, the structure of each component of the third rotating assembly 103 and the connection relationship between each component and the fixed base 10 can refer to the relevant description of the first rotating assembly 101.

[0106] The fourth rotating assembly 104 and the third rotating assembly 103 may be the same or similar assemblies, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the structure of the fourth rotating assembly 104 is the same as that of the second rotating assembly 102. The fourth rotating assembly 104 includes a first fixed plate 21C, a second fixed plate 22C, a first main swing arm 31C, and a second main swing arm 32C. When the first fixed plate 21C rotates relative to the fixed base 10, the first main swing arm 31C is driven to slide and rotate relative to the fixed base 10. When the second fixed plate 22C rotates relative to the fixed base 10, the second main swing arm 32C is driven to slide and rotate relative to the fixed base 10. Specifically, the structure of each component of the fourth rotating assembly 104 and the connection relationship between each component and the fixed base 10 can refer to the relevant description of the first rotating assembly 101.

[0107] In this embodiment, the first fixed plate 21A in the second rotating assembly 102, the first fixed plate 21B in the third rotating assembly 103, and the first fixed plate 21C in the fourth rotating assembly 104 are an integrally formed structure, and together constitute the third fixed plate 23. The second fixed plate 22A in the second rotating assembly 102, the second fixed plate 22B in the third rotating assembly 103, and the second fixed plate 22C in the fourth rotating assembly 104 are an integrally formed structure, and together constitute the fourth fixed plate 24. In other embodiments, the first fixed plate 21A in the second rotating assembly 102, the first fixed plate 21B in the third rotating assembly 103, and the first fixed plate 21C in the fourth rotating assembly 104 may also be a split structure, and the second fixed plate 22A in the second rotating assembly 102, the second fixed plate 22B in the third rotating assembly 103, and the second fixed plate 22C in the fourth rotating assembly 104 may also be a split structure.

[0108] The pressure plate assembly 3 includes a pressure plate 301 and a pressure plate swing arm 302. The pressure plate swing arm 302 is slidably connected to the pressure plate 301. The pressure plate 301 is slidably connected to the fixed plate 20, the third fixed plate 23 and the fourth fixed plate 24 in the first rotating assembly 101. The pressure plate swing arm 302 is installed on the fixed base 10, and is rotatably and slidably connected to the fixed base 10. When the rotating assembly 1 rotates relative to the fixed base 10, the fixed plate, the third fixed plate 23 and the fourth fixed plate 24 in the first rotating assembly 101 all rotate relative to the fixed base 10, and together drive the pressure plate 301 to rotate relative to the fixed base 10, and the pressure plate 301 slides relative to the fixed plate 20, and at the same time, the pressure plate 301 drives the pressure plate swing arm 302 to rotate relative to the fixed base 10.

[0109] The synchronization component 2 is installed on the fixed base 10 and is slidably connected with the fixed plate 20. In this embodiment, there are two synchronization components 2. In other embodiments, there may be one or more than three synchronization components 2. The two synchronization components 2 in this embodiment are respectively a first synchronization component 201 and a second synchronization component 202. The first synchronization component 201 includes a synchronization member 51, a damping member 52 and a synchronization swing arm. The synchronization member 51 is fixedly connected with the damping member 52 and is installed in the fixed base 10. The synchronization swing arm is fixedly connected with the damping member 52 and is slidably connected with the rotating component 1. When the rotating component 1 rotates relative to the fixed base 10, the synchronization swing arm is driven to rotate and a force is generated on the damping member 52, so that the damping member 52 generates a damping force. At the same time, the synchronization swing arm drives the synchronization member 51 to rotate, thereby realizing the synchronous rotation of the rotating mechanism 100. During the rotation of the foldable electronic device 500, the damping member 52 can provide a damping force so that the user can experience a better damping feel, thereby improving the user's experience. When the damping force reaches a certain value, the foldable electronic device 500 can also be suspended at a preset angle.

[0110] The second synchronization component 202 and the first synchronization component 201 may be the same or similar components, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the structure of the second synchronization component 202 is the same as that of the first synchronization component 201, and will not be described in detail here.

[0111] Please refer to FIG. 7 and FIG. 8 . FIG. 7 is a schematic diagram of the exploded structure of the fixed base 10 in the rotating mechanism 100 shown in FIG. 6 , and FIG. 8 is a schematic diagram of a partially enlarged structure of the fixed base 10 shown in FIG. 7 .

[0112] The fixed base 10 includes a lower shell 11 and an upper shell 12. The lower shell 11 includes a bottom plate 111, a first end plate 112, and a second end plate 113. The first end plate 112 and the second end plate 113 are located on opposite sides of the bottom plate 111 in the Y direction and are fixedly connected to the bottom plate 111. The upper shell 12 is mounted on the lower shell 11 and is fixedly connected to the lower shell 11, and the upper shell 12 is arranged opposite to the bottom plate 111. In this embodiment, the upper shell 12 and the lower shell 11 are fixedly connected by bolts. In other embodiments, the upper shell and the lower shell can also be fixedly connected by glue or welding.

[0113] In this embodiment, the upper housing 12 is composed of four sub-housings. The four sub-housings are respectively a first sub-housing 12A, a second sub-housing 12B, a third sub-housing 12C and a fourth sub-housing 12D. The first sub-housing 12A, the second sub-housing 12B, the third sub-housing 12C and the fourth sub-housing 12D are arranged in sequence along the Y direction. Among them, the first sub-housing 12A is located on the negative side of the Y axis of the fixed base 10, and the fourth sub-housing 12D is located on the positive side of the Y axis of the fixed base 10. In this embodiment, the four sub-housings are split structures. In other embodiments, the four sub-housings can also be an integrally formed structure.

[0114] The first sub-housing 12A is provided with a first rotation groove 123 and a second rotation groove 124. In the present embodiment, the first rotation groove 123 and the second rotation groove 124 are arranged side by side along the X direction, and the first rotation groove 123 and the second rotation groove 124 are symmetrical about the symmetry axis O. The bottom wall of the first rotation groove 123 is arc-shaped, and the bottom wall of the first rotation groove 123 is provided with a first slide rail 1231. The first slide rail 1231 is arc-shaped, and the bending direction of the first slide rail 1231 is substantially the same as the bending direction of the bottom wall of the first rotation groove 123. The side wall of the first rotation groove 123 is provided with a second slide rail 1232. In the present embodiment, there are two second slide rails 1232, and the two second slide rails 1232 are symmetrically arranged on two opposite side walls of the first rotation groove 123. The bending direction of the second slide rail 1232 is consistent with the bending direction of the first slide rail 1231. Each second slide rail 1232 includes a slide rail bottom wall 1233 and a protrusion 1234. The protrusion 1234 is connected to the side wall of the first rotation groove 123, and is opposite to and spaced from the bottom wall 1233 of the slide rail. In this embodiment, the bottom wall of the first rotation groove 123 is further provided with a first hollow portion 1235, which penetrates the bottom wall of the first rotation groove 123 and is opposite to the protrusion 1234. The first rotation groove 123 is used for the first main swing arm 31 in the first rotation assembly 101, and the first main swing arm 31 can rotate and slide along the first rotation groove 123.

[0115] In this embodiment, by setting the first slide rail 1231 and the two second slide rails 1232 in the first rotation groove 123, and the sliding track of the first main swing arm 31 is limited by the first slide rail 1231 and the two second slide rails 1232, the precision requirement for the first rotation groove 123 can be reduced, and the processing cost can be reduced. In addition, the first slide rail 1231 and the two second slide rails 1232 are arranged in a distributed manner, which reduces the processing difficulty of the first sub-shell 12A. At the same time, by setting the first hollow portion 1235, the first sub-shell 12A can be prepared by mold forming, which simplifies the processing technology of the upper shell 12 and avoids the problem of undercut. In addition, in this embodiment, by setting the protrusion 1234 on the side wall of the first rotation groove 123, the first main swing arm 31 can be limited, which can prevent the first main swing arm 31 from detaching from the first rotation groove 123.

[0116] In this embodiment, the structure of the second rotating groove 124 is the same as that of the first rotating groove 123. The second rotating groove 124 includes a third slide rail 1241 and two fourth slide rails 1242. The third slide rail 1241 is disposed on the bottom wall of the second rotating groove 124, and the two fourth slide rails 1242 are respectively disposed on two opposite side walls of the second rotating groove 124. The second rotating groove 124 is used to install the second main swing arm 32, and the second main swing arm 32 can rotate and slide along the second rotating groove 124.

[0117] The first sub-housing 12A is further provided with a third rotation groove 125 and a fourth rotation groove 126. The third rotation groove 125 and the fourth rotation groove 126 are arranged side by side along the X direction, and the third rotation groove 125 and the fourth rotation groove 126 are axisymmetric about the symmetry axis O. Among them, the third rotation groove 125 is arranged side by side with the first rotation groove 123 along the Y direction, and the third rotation groove 125 is located in the negative direction of the Y axis of the first rotation groove 123. The fourth rotation groove 126 is arranged side by side with the second rotation groove 124 along the Y direction, and the fourth rotation groove 126 is located in the negative direction of the Y axis of the second rotation groove 124.

[0118] The structure of the third rotating groove 125 is substantially the same as that of the first rotating groove 123. The third rotating groove 125 includes a fifth slide rail 1251 and two sixth slide rails 1252. The fifth slide rail 1251 is disposed on the bottom wall of the third rotating groove 125, and the two sixth slide rails 1252 are respectively disposed on two opposite side walls of the third rotating groove 125. The third rotating groove 125 is used to mount a pressure plate swing arm. The pressure plate swing arm can rotate and slide along the third rotating groove 125. The fourth rotating groove 126 includes a seventh slide rail 1261 and two eighth slide rails 1262. The seventh slide rail 1261 is disposed on the bottom wall of the fourth rotating groove 126, and the two eighth slide rails 1262 are respectively disposed on two opposite side walls of the fourth rotating groove 126. The fourth rotating groove 126 is used to mount a pressure plate swing arm. The pressure plate swing arm can rotate and slide along the fourth rotating groove 126.

[0119] The fixed base 10 is also provided with a first rotating shaft 127 and a second rotating shaft 128. The first rotating shaft 127 includes a first fixed portion 1271 and a first extending portion 1272. The first fixed portion 1271 is fixedly connected to the first extending portion 1272. In this embodiment, at least part of the first fixed portion 1271 is a flat shaft section, and the first extending portion 1272 is a round shaft. The axial directions of the first fixed portion 1271 and the first extending portion 1272 are parallel to the Y direction, and the axis of the first fixed portion 1271 and the axis of the first extending portion 1272 are staggered. The first rotating shaft 127 is installed on the first sub-housing 12A, and is arranged at intervals with the third rotating groove 125 along the Y direction, and the first rotating shaft 127 can rotate relative to the first sub-housing 12A. Among them, the first fixed portion 1271 is located on the inner side of the first sub-housing 12A, and the first extending portion 1272 extends out of the first sub-housing 12A. The first fixing portion 1271 is used to be fixedly connected to the first auxiliary swing arm 41 in the first rotating assembly 101, and the first extending portion 1272 is used to be connected to the floating plate 80. When the first auxiliary swing arm 41 rotates relative to the fixed base 10, it can drive the first fixing portion 1271 to rotate, and drive the first extending portion 1272 to rotate, so as to drive the floating plate 80 to move in the Z direction.

[0120] The structure of the second rotating shaft 128 is the same as that of the first rotating shaft 127. The second rotating shaft 128 includes a second fixed portion 1281 and a second extending portion 1282. The second fixed portion 1281 is fixedly connected to the second extending portion 1282. The second rotating shaft 128 is rotatably connected to the first sub-housing 12A, and is arranged with the fourth rotating groove 126 in a spaced relationship along the Y direction, and the second rotating shaft 128 and the first rotating shaft 127 are symmetrical about the symmetry axis O. The second fixed portion 1281 is used to be fixedly connected to the second auxiliary swing arm 42 in the first rotating assembly 101, and the second extending portion 1282 is used to be connected to the floating plate 80. When the second auxiliary swing arm 42 rotates relative to the fixed base 10, it can drive the second fixed portion 1281 to rotate, and drive the second extending portion 1282 to rotate, so as to drive the floating plate 80 to move in the Z direction together with the first extending portion 1272.

[0121] The second sub-housing 12B and the first sub-housing 12A can be the same or similar components, symmetrical or partially symmetrical structures, or different structures. In the present embodiment, the second sub-housing 12B includes a third rotation groove 125B, a fourth rotation groove 126B, a first rotation axis 127B and a second rotation axis 128B. The basic structure of each component in the second sub-housing 12B, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can all refer to the relevant design of the first sub-housing 12A. The second sub-housing 12B and the first sub-housing 12A can be the same or different in the detailed structure or position arrangement of the components. The third rotation groove 125B and the fourth rotation groove 126B in the second sub-housing 12B are used to install the pressure plate swing arm. The first rotation axis 127B in the second sub-housing 12B is used to be fixedly connected to the first auxiliary swing arm 41 in the second rotating assembly 102, and the second rotation axis 128B is used to be fixedly connected to the second auxiliary swing arm 42.

[0122] The third sub-housing 12C and the first sub-housing 12A can be the same or similar components, symmetrical or partially symmetrical structures, or different structures. In the present embodiment, the third sub-housing 12C includes a first rotation groove 123C, a second rotation groove 124C, a third rotation groove 125C and a fourth rotation groove 126C. The basic structure of each component in the third sub-housing 12C, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can all refer to the relevant design of the first sub-housing 12A. The first rotation groove 123C in the third sub-housing 12C is used to rotate and slide with the first main swing arm 31 in the third rotating assembly 103, and the second rotation groove 124C is used to rotate and slide with the second main swing arm 32. The third rotation groove 125C and the fourth rotation groove 126C in the third sub-housing 12C are used to install the pressure plate swing arm.

[0123] The fourth sub-housing 12D and the first sub-housing 12A can be the same or similar components, symmetrical or partially symmetrical structures, or different structures. In the present embodiment, the fourth sub-housing 12D includes a first rotation groove 123D, a second rotation groove 124D, a third rotation groove 125D and a fourth rotation groove 126D. The basic structure of each component in the fourth sub-housing 12D, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can all refer to the relevant design of the first sub-housing 12A. The first rotation groove 123D in the fourth sub-housing 12D is used to rotate and slide with the first main swing arm 31 in the fourth rotating assembly 104, and the second rotation groove 124D is used to rotate and slide with the second main swing arm 32. The third rotation groove 125D and the fourth rotation groove 126D in the fourth sub-housing 12D are used to install the pressure plate swing arm.

[0124] Please refer to FIG. 9 , which is an enlarged structural schematic diagram of the fixing plate 20 in the first rotating assembly 101 in the rotating mechanism 100 shown in FIG. 6 .

[0125] The fixing plate 20 in the first rotating assembly 101 includes a first fixing plate 21 and a second fixing plate 22. The first fixing plate 21 is a long strip plate structure with thickness. The first fixing plate 21 includes a first upper surface 2111, a first lower surface 2112, a first side surface 2113, a second side surface 2114, a first end surface 2115, and a second end surface 2116. The first upper surface 2111 and the first lower surface 2112 are arranged opposite to each other, the first side surface 2113 and the second side surface 2114 are arranged opposite to each other, and the first end surface 2115 and the second end surface 2116 are arranged opposite to each other. The first side surface 2113 and the second side surface 2114 are both connected between the first upper surface 2111 and the first lower surface 2112, and the first end surface 2115 and the second end surface 2116 are both connected between the first side surface 2113 and the second side surface 2114.

[0126] The first fixed plate 21 is provided with a first notch 212, a second notch 213, a first slide groove 214 and a first guide groove 215. The first notch 212 and the second notch 213 are both provided on the second side surface 2114, and the first notch 212 and the second notch 213 both penetrate the first upper surface 2111 and the first lower surface 2112. A first sleeve 216 is fixed to the inner wall of the first notch 212, and the axial extension direction of the first sleeve 216 is parallel to the Y direction. The first sleeve 216 is used to be rotatably connected with the first main swing arm 31 in the first rotating assembly 101. The second notch 213 is used to avoid the pressure plate assembly 3. In this embodiment, there are two first guide grooves 215, both of which are arc-shaped, and are concavely provided on the first upper surface 2111 and penetrate the first side surface 2113. One of the first guide grooves 215 is located on one side of the first end surface 2115. The other first guide groove 215 is located on the side close to the second end surface 2116. The first guide groove 215 is used for sliding connection with the pressure plate assembly 3. The first slide groove 214 is located between the first notch 212 and the first guide groove 215 close to the first end surface 2115, and is spaced apart from the first notch 212 and the first guide groove 215, and the first slide groove 214 passes through the first side surface 2113 and the second side surface 2114. The first slide groove 214 is used for sliding connection with the first auxiliary swing arm 41 in the first rotating assembly 101.

[0127] The second fixing plate 22 and the first fixing plate 21 are mirror-symmetrical structures, and the second fixing plate 22 and the first fixing plate 21 are axisymmetric about the symmetry axis O. The second fixing plate 22 includes a second upper surface 2211, a second lower surface 2212, a third side surface 2213, a fourth side surface 2214, a third end surface 2215 and a fourth end surface 2216 that enclose and form the outer surface of the second fixing plate 22. The second fixing plate 22 is provided with a third notch 222, a fourth notch 223, a second slide groove 224 and a second guide groove 225. The structure of the third notch 222 is the same as that of the first notch 212, and a second sleeve 226 is provided on the inner wall of the third notch 222. The structure of the fourth notch 223 is the same as that of the second notch 213, the structure of the second guide groove 225 is the same as that of the first guide groove 215, and the structure of the second slide groove 224 is the same as that of the first slide groove 214. The second sleeve 226 is used for rotational connection with the second main swing arm 32 in the first rotating assembly 101, the fourth notch 223 is used to avoid the pressure plate assembly 3, the second guide groove 225 is used for sliding connection with the pressure plate assembly 3, and the second slide groove 224 is used for sliding connection with the second auxiliary swing arm 42 in the first rotating assembly 101.

[0128] The fixed plates in the second rotating assembly 102, the third rotating assembly 103 and the fourth rotating assembly 104 have similar structures to the fixed plates in the first rotating assembly 101, and their specific structures can be appropriately adjusted according to the types of swing arms in different rotating assemblies 1. In this embodiment, the third fixed plate 23 is further provided with a third slide groove 231 and a fifth slide groove 232, and the fourth fixed plate 24 is provided with a fourth slide groove 241 and a sixth slide groove 242. The third slide groove 231 and the fourth slide groove 241 are used to install the first damping assembly, and the fifth slide groove 232 and the sixth slide groove 242 are used to install the second damping assembly.

[0129] Please refer to Fig. 10, which is a schematic structural diagram of the main swing arm of the first rotating assembly 101 in the rotating mechanism 100 shown in Fig. 6. Fig. 10 shows the structure of the rotating shaft.

[0130] The main swing arm in the first rotating assembly 101 includes a first main swing arm 31 and a second main swing arm 32. The first main swing arm 31 includes a first rotating body 311, a first swinging body 312 and a first rotating shaft 313. The first rotating body 311 is an arc-shaped plate-like structure. The first rotating body 311 includes a first sliding portion 3111 and two second sliding portions 3112. The two second sliding portions 3112 are respectively located on opposite sides of the first rotating body 311 in the X direction, and the first sliding portion 3111 is located between the two second sliding portions 3112. The structure of the first rotating body 311 matches the structure of the first rotating groove 123 of the fixed base 10, the structure of the first sliding portion 3111 matches the structure of the first slide rail 1231, and the structure of the second sliding portion 3112 matches the structure of the second slide rail 1232. The first swinging body 312 is a plate-like structure. One end of the first swinging body 312 is fixedly connected to the first rotating body 311, and the other end is fixedly connected to the first rotating shaft 313. The axis of the first rotating shaft 313 extends in a direction parallel to the Y direction. The first main swing arm 31 is installed in the first rotating groove 123 , and is used to be rotatably and slidably connected to the fixed base 10 , and is rotatably connected to the first fixed plate 21 .

[0131] The second main swing arm 32 has the same structure as the first main swing arm 31. The second main swing arm 32 includes a second rotating body 321, a second swinging body 322, and a second rotating shaft 323. The second rotating body 321 is provided with a third sliding portion 3211 and two fourth sliding portions 3212. The structure of the second rotating body 321 is the same as that of the first rotating body 311, the structure of the second swinging body 322 is the same as that of the first swinging body 312, and the structure of the second rotating shaft 323 is the same as that of the first rotating shaft 313. The second main swing arm 32 is installed in the second rotating groove 124 of the fixed base 10, and is used for rotationally and slidingly connecting with the fixed base 10, and is rotationally connected with the second fixed plate 22.

[0132] The structures of the main swing arm in the third rotating assembly 103 and the main swing arm in the fourth rotating assembly 104 are the same as or similar to the structure of the main swing arm in the first rotating assembly 101, and are not described in detail here.

[0133] Please refer to FIG. 11 , which is an enlarged structural diagram of the auxiliary swing arm of the first rotating assembly 101 in the rotating mechanism 100 shown in FIG. 6 .

[0134] The auxiliary swing arm 40 of the first rotating assembly 101 includes a first auxiliary swing arm 41 and a second auxiliary swing arm 42. The first auxiliary swing arm 41 includes a first auxiliary shaft seat 411 and a first auxiliary swing body 412. The first auxiliary swing body 412 is a plate-like structure. The first auxiliary shaft seat 411 is fixedly connected to the first auxiliary swing body 412, and the axis extension direction of the first auxiliary shaft seat 411 is parallel to the Y direction. The first auxiliary swing arm 41 is used to be rotatably connected to the fixed base 10, and is slidably and rotatably connected to the first fixed plate 21. The second auxiliary swing arm 42 has the same structure as the first auxiliary swing arm 41. The second auxiliary swing arm 42 includes a second auxiliary shaft seat 421 and a second auxiliary swing body 422. The structure of the second auxiliary shaft seat 421 is the same as that of the first auxiliary shaft seat 411, and the structure of the second auxiliary swing body 422 is the same as that of the first auxiliary swing body 412. The second auxiliary swing arm 42 is used to be rotatably connected to the fixed base 10, and is slidably and rotatably connected to the second fixed plate 22.

[0135] Please refer to FIG. 12 and FIG. 13 . FIG. 12 is a partial structural schematic diagram of the rotating mechanism 100 shown in FIG. 5 in a flattened state. FIG. 13 is a partial structural schematic diagram of the rotating mechanism 100 shown in FIG. 12 in a folded state.

[0136] The first fixed plate 21, the first main swing arm 31 and the first auxiliary swing arm 41 are located on one side of the fixed base 10, that is, on the negative direction of the X axis, and the second fixed plate 22, the second main swing arm 32 and the second auxiliary swing arm 42 are located on the other side of the fixed base 10, that is, on the positive direction of the X axis. Among them, the first rotating body 311 of the first main swing arm 31 is installed in the first rotating groove 123, the first sliding part 3111 is installed on the first slide rail 1231, and the second sliding part 3112 is installed on the second slide rail 1232. The first rotating body 311 can slide and rotate along the first slide rail 1231 and the second slide rail 1232 in the first rotating groove 123. The first rotating shaft 313 is installed in the first shaft sleeve 216 of the first fixed plate 21, and the first rotating shaft 313 can rotate in the first shaft sleeve 216. The first auxiliary swing arm 41 and the first main swing arm 31 are arranged at intervals along the Y direction. The first secondary shaft seat 411 is installed on the first rotating shaft 127, and the first secondary swinging body 412 is installed in the first sliding groove 214, and can slide and rotate in the first sliding groove 214. The first fixing plate 21 is fixedly connected to the first housing 210.

[0137] The second main swing arm 32 is arranged side by side with the first main swing arm 31 along the X direction, and the second auxiliary swing arm 42 is arranged side by side with the first auxiliary swing arm 41 along the X direction. The second rotating body 321 of the second main swing arm 32 is installed in the second rotating groove 124, the third sliding part 3211 is installed in the third slide rail 1241, and the fourth sliding part 3212 is installed in the fourth slide rail 1242. The second rotating body 321 can slide and rotate along the third slide rail 1241 and the fourth slide rail 1242 in the fourth rotating groove 126. The second rotating shaft 323 is installed in the second sleeve 226 of the second fixed plate 22, and the second rotating shaft 323 can rotate in the second sleeve 226. The second auxiliary swing arm 42 and the second main swing arm 32 are arranged at intervals along the Y direction. The second auxiliary shaft seat 421 is installed on the second rotating shaft 128, and the second auxiliary swing body 422 is installed in the second slide groove 224, and can slide and rotate in the second slide groove 224. The second fixing plate 22 is fixedly connected to the second housing 220 .

[0138] The first housing 210 rotates relative to the fixed base 10 to drive the first fixed plate 21 to rotate relative to the fixed base 10, thereby driving the first main swing arm 31 to rotate, and causing the first rotating shaft 313 to rotate in the first sleeve 216, and the first rotating body 311 to rotate in the first rotating groove 123. At the same time, the first fixed plate 21 also drives the first auxiliary swing arm 41 to rotate, and causes the first auxiliary swing body 412 to slide in the first slide groove 214, and the first auxiliary shaft seat 411 drives the first rotating shaft 127 to rotate relative to the fixed base 10. The second housing 220 rotates relative to the fixed base 10 to drive the second fixed plate 22 to rotate relative to the fixed base 10, thereby driving the second main swing arm 32 to rotate, and causing the second rotating shaft 323 to rotate in the second sleeve 226, and the second rotating body 321 to rotate in the second rotating groove 124. At the same time, the second fixed plate 22 also drives the second auxiliary swing arm 42 to rotate, and causes the second auxiliary swing body 422 to slide in the second slide groove 224, and the second auxiliary shaft seat 421 rotates relative to the second rotating shaft 128. Among them, the rotation direction of the first fixed plate 21 is opposite to the rotation direction of the second fixed plate 22, the rotation direction of the first main swing arm 31 is opposite to the rotation direction of the second main swing arm 32, and the rotation direction of the first auxiliary swing arm 41 is opposite to the rotation direction of the second auxiliary swing arm 42.

[0139] For example, when the rotating mechanism 100 is switched from the flattened state to the folded state, the first fixed plate 21, the first main swing arm 31 and the first auxiliary swing arm 41 rotate clockwise, and the second fixed plate 22, the second main swing arm 32 and the second auxiliary swing arm 42 rotate counterclockwise. When the rotating mechanism 100 is switched from the folded state to the flattened state, the first fixed plate 21, the first main swing arm 31 and the first auxiliary swing arm 41 rotate counterclockwise, and the second fixed plate 22, the second main swing arm 32 and the second auxiliary swing arm 42 rotate clockwise.

[0140] In this embodiment, by providing the first fixing plate 21 and the second fixing plate 22, and making the first fixing plate 21 fixedly connected to the first shell 210, and the second fixing plate 22 fixedly connected to the second shell 220, the connection strength between the fixing plate 20 and the shell can be increased, and the stability of the rotation of the foldable electronic device 500 can be improved. In addition, by providing the first main swing arm 31 and the second main swing arm 32, the first fixing plate 21 and the second fixing plate 22 can be rotated relative to the fixed base 10. In addition, by providing the first auxiliary swing arm 41, when the first fixing plate 21 rotates relative to the fixed base 10, the first auxiliary swing arm 41 and the first main swing arm 31 are driven to rotate together, so as to realize the rotation of the first fixing plate 21 relative to the fixed base 10, so as to increase the stability of the rotation of the first fixing plate 21; by providing the second auxiliary swing arm 42, when the second fixing plate 22 rotates relative to the fixed base 10, the second auxiliary swing arm 42 and the second main swing arm 32 are driven to rotate together, so as to realize the rotation of the second fixing plate 22 relative to the fixed base 10, so as to increase the stability of the rotation of the second fixing plate 22.

[0141] Please refer to FIG. 14 and FIG. 15 . FIG. 14 is a schematic structural diagram of the first synchronous assembly 201 in the rotating mechanism 100 shown in FIG. 6 , and FIG. 15 is a partially enlarged schematic structural diagram of the first synchronous assembly 201 shown in FIG. 14 .

[0142] The first synchronization assembly 201 includes a synchronization member 51, a damping member 52, a first synchronization swing arm 53 and a second synchronization swing arm 54. The first synchronization swing arm 53 and the second synchronization swing arm 54 are both hinged to the damping member 52, and the first synchronization swing arm 53 and the second synchronization swing arm 54 are respectively located on opposite sides of the damping member 52 in the X direction. The synchronization member 51 is fixedly connected to the first synchronization swing arm 53 and the second synchronization swing arm 54. When the first synchronization swing arm 53 rotates, the synchronization member 51 is driven to rotate, thereby driving the second synchronization swing arm 54 to rotate, so as to achieve the synchronous movement of the first synchronization swing arm 53 and the second synchronization swing arm 54. In addition, when the first synchronization swing arm 53 and the second synchronization swing arm 54 rotate, they abut against the damping member 52, so that the damping member 52 generates a damping force, thereby providing a damping feel for the rotation of the rotating mechanism 100.

[0143] The synchronous member 51 includes a first mounting plate 511, a second mounting plate 512, a synchronous gear 513 and a rotating rod 514. The first mounting plate 511 and the second mounting plate 512 are arranged side by side and spaced apart along the Y direction. The synchronous gear 513 is installed between the first mounting plate 511 and the second mounting plate 512, and is rotatably connected to the first mounting plate 511 and the second mounting plate 512. The rotating rod 514 is fixedly connected to the synchronous gear 513.

[0144] The synchronous gear 513 includes a first gear 515, a second gear 516 and an intermediate gear 519. The first gear 515, the intermediate gear 519 and the second gear 516 are installed side by side between the first mounting plate 511 and the second mounting plate 512 along the X direction, and are rotatably connected with the first mounting plate 511 and the second mounting plate 512, and the axial directions of the first gear 515, the intermediate gear 519 and the second gear 516 are parallel to the Y direction. The intermediate gear 519 is located between the first gear 515 and the second gear 516, and meshes with the first gear 515 and the second gear 516. In this embodiment, there are two intermediate gears 519, and the two intermediate gears 519 are the third gear 517 and the fourth gear 518 respectively. When the first gear 515 rotates, it drives the intermediate gear 519 to rotate, thereby driving the second gear 516 to rotate. Among them. The rotation directions of the first gear 515 and the second gear 516 are opposite.

[0145] The outer circumference of the first gear 515 is provided with a plurality of first teeth 5151, and the plurality of first teeth 5151 are arranged in parallel and at intervals. In this embodiment, the first teeth 5151 are distributed on part of the outer circumference of the first gear 515. That is to say, with the plane where the axis of the first gear 515 is located as the boundary, part of the outer circumference of the first gear 515 is provided with the first teeth 5151, and part of the outer circumference is not provided with the first teeth 5151. In other embodiments, the first teeth 5151 can also be distributed on the entire outer circumference of the first gear 515 around the axis of the first gear 515, that is, the first teeth 5151 surround the outer circumference of the first gear 515. The first teeth 5151 are helical teeth. The tangent direction of the first teeth 5151 intersects with the axial direction of the first gear 515. In this embodiment, the first teeth 5151 are spiral, and the spiral angle of the first teeth 5151 is 15° to 45°. In other words, the angle between the tangent direction of the first teeth 5151 and the axial direction of the first gear 515 is 15° to 45°. It is understandable that the first gear 515 is a helical gear. The "helical gear" mentioned here refers to a gear in which the angle between the extension direction of the teeth and the axial direction is greater than 0°.

[0146] The outer circumferential surface of the second gear 516 is provided with a plurality of second teeth 5161. The plurality of second teeth 5161 are in a spiral shape. The second teeth 5161 are different from the first teeth 5151 in that the spiral direction of the second teeth 5161 is opposite to the spiral direction of the first teeth 5151. The first gear 515 and the second gear 516 are respectively located on opposite sides of the synchronous gear 513 in the X direction, and the first teeth 5151 and the second teeth 5161 are arranged opposite to each other.

[0147] The outer circumference of the third gear 517 is provided with a plurality of third teeth 5171. The third teeth 5171 are in a spiral shape. The difference between the third teeth 5171 and the second teeth 5161 is that the third teeth 5171 surround the outer circumference of the third gear 517. The outer circumference of the fourth gear 518 is provided with a plurality of fourth teeth 5181. The plurality of fourth teeth 5181 are in a spiral shape. The difference between the fourth teeth 5181 and the third teeth 5171 is that the spiral direction of the fourth teeth 5181 is opposite to the spiral direction of the third teeth 5171.

[0148] The first gear 515, the third gear 517, the fourth gear 518 and the second gear 516 are arranged in parallel in sequence along the X direction. The first gear 515 is meshed with the third gear 517, the third gear 517 is meshed with the fourth gear 518, and the fourth gear 518 is meshed with the second gear 516. The first tooth 5151 and the fourth tooth 5181 have the same spiral direction, and the first gear 515 and the fourth gear 518 have the same rotation direction. The second gear 516 and the third gear 517 have the same spiral direction, and the second gear 516 and the third gear 517 have the same rotation direction. When the first gear 515 rotates, the third gear 517 is driven to rotate through the first tooth 5151, and then the third gear 517 drives the fourth gear 518 to rotate through the third tooth 5171, and the fourth gear 518 drives the second gear 516 to rotate through the fourth tooth 5181, thereby realizing the synchronous rotation of the first gear 515, the second gear 516, the third gear 517 and the fourth gear 518.

[0149] In this embodiment, the overlap between two adjacent gears is greater than 1.2, that is, the overlap between the first gear 515 and the third gear 517 is greater than 1.2, the overlap between the third gear 517 and the fourth gear 518 is greater than 1.2, and the overlap between the second gear 516 and the fourth gear 518 is greater than 1.2.

[0150] It should be noted that the overlap degree ε γ The calculation formula is: γ =ε α +ε β Among them, ε α is the end face overlap, ε β is the longitudinal overlap. End face overlap ε α The calculation formula is: α =1 / 2π[z1(tanα at1 -tanα' t )±z2(tanα at2 -tanα' t )]; longitudinal overlap ε β The calculation formula is: β =bsinβ / πm nAmong them, z1 and z2 are the number of teeth of the gear, α at1 and α at1 is the tooth tip circle pressure angle, α' t is the meshing angle of the end face pitch circle, β is the helix angle, b is the gear width; m n is the normal modulus.

[0151] In this embodiment, by setting the synchronous gear 513 as a helical gear, the longitudinal overlap ε of the synchronous gear 513 is increased. β , thereby increasing the overlap between two adjacent gears ε γ , thereby increasing the stability of the synchronous gear 513, improving the smoothness of the transmission of the synchronous assembly 2, and the stability of the rotation of the rotating mechanism 100. In addition, it is also possible to improve the impact resistance and load-bearing capacity of the synchronous assembly 2, extend the life of the synchronous assembly 2, and improve the durability of the rotating mechanism 100. At the same time, in this embodiment, by adjusting the helix angle β and the gear width b, the longitudinal overlap ε of the synchronous gear 513 can be increased. β And the overlap ε γ , so that more teeth in the synchronous gear 513 can be involved in the meshing, further increasing the stability of the rotation of the synchronous gear 513 and preventing the tooth root from breaking.

[0152] In this embodiment, the longitudinal overlap of the synchronous gear 513 is β After the increase, under the condition of continuous transmission, the end surface overlap ε can be appropriately reduced according to the actual application scenario. α The requirements of the present invention can be met, for example, by increasing the gear modulus and reducing the number of teeth of the gear, thereby reducing the diameter of the gear and reducing the thickness of the rotating mechanism 100 in the folded state, thereby achieving a thin and light foldable electronic device 500. At the same time, increasing the gear modulus and reducing the number of teeth of the gear is also beneficial to improving the strength of the tooth root. In addition, the synchronous gear 513 in this embodiment can also be a short tooth. By adjusting the helix angle of the gear and reducing the minimum number of teeth for root cutting, the gear modulus is increased, the bending resistance of the tooth root is improved, and the durability of the synchronous gear 513 is improved.

[0153] Among them, the center distance of the synchronous swing arm a=(m n z1+m n In this embodiment, the middle distance a of the synchronous swing arm can be adjusted by adjusting the helical angle β of the gear.

[0154] The rotating rod 514 includes a first rotating rod 5141 and a second rotating rod 5142. The first rotating rod 5141 is fixedly connected to the first gear 515, and extends through the second mounting plate 512 in a direction away from the second mounting plate 512, and the extension direction of the first rotating rod 5141 is parallel to the Y direction. The second rotating rod 5142 is fixedly connected to the second gear 516, and extends through the second mounting plate 512 in a direction away from the second mounting plate 512, and the second rotating rod 5142 is parallel to the first rotating rod 5141 and is spaced apart. In this embodiment, the first rotating rod 5141 and the second rotating rod 5142 are both flat shafts to achieve a fixed connection between the first rotating rod 5141 and the first synchronous swing arm 53, and a fixed connection between the second rotating rod 5142 and the second synchronous swing arm 54.

[0155] Please refer to FIG. 16 , which is a schematic diagram of a partial structure of the first synchronization component 201 shown in FIG. 14 in another implementation manner.

[0156] The difference between this embodiment and the embodiment shown in FIG. 15 is that, in this embodiment, the teeth of the first gear 515, the second gear 516, the third gear 517 and the fourth gear 518 are all "V"-shaped teeth. Among them, a plurality of first teeth 5151 are arranged at intervals and in parallel on the outer periphery of the first gear 515. Each first tooth 5151 includes a first sub-tooth 5152 and a second sub-tooth 5153. The plurality of first sub-teeth 5152 are arranged in parallel and at intervals. The first sub-teeth 5152 have a first helical angle, which is 15° to 45°. The plurality of second sub-teeth 5153 are arranged in parallel and at intervals. The second sub-teeth 5153 have a second helical angle, which is 15° to 45°. Each first sub-teeth 5152 is fixedly connected to the corresponding second sub-teeth 5153 to form a "V"-shaped structure, and the first sub-teeth 5152 and the second sub-teeth 5153 are arranged symmetrically with respect to the radial direction of the first gear 515.

[0157] The outer circumferential surface of the second gear 516 is provided with a second tooth 5161. The shape of the second tooth 5161 is similar to that of the first tooth 5151. The second tooth 5161 includes a third sub-tooth 5162 and a fourth sub-tooth 5163. The third sub-tooth 5162 is opposite to the first sub-tooth 5152, and the spiral direction of the third sub-tooth 5162 is opposite to the spiral direction of the first sub-tooth 5152, and the fourth sub-tooth 5163 is opposite to the second sub-tooth 5153, and the spiral direction of the fourth sub-tooth 5163 is opposite to the spiral direction of the second sub-tooth 5153.

[0158] The outer circumference of the third gear 517 is provided with a third tooth 5171. The third tooth 5171 includes a fifth sub-tooth 5172 and a sixth sub-tooth 5173. The structure of the third tooth 5171 is the same as that of the first tooth 5151. The third tooth 5171 surrounds the outer circumference of the third gear 517. The outer circumference of the fourth gear 518 is provided with a fourth tooth 5181. The fourth tooth 5181 includes a seventh sub-tooth 5182 and an eighth sub-tooth 5183. The structure of the fourth tooth 5181 is similar to that of the third tooth 5171. The difference between the fourth tooth 5181 and the third tooth 5171 is that the spiral direction of the seventh sub-tooth 5182 is opposite to that of the fifth sub-tooth 5172, and the spiral direction of the eighth sub-tooth 5183 is opposite to that of the sixth sub-tooth 5173.

[0159] The first gear 515, the third gear 517, the fourth gear 518 and the second gear 516 are arranged in parallel in sequence along the X direction. The first gear 515 is meshed with the third gear 517, the first sub-tooth 5152 is meshed with the fifth sub-tooth 5172, and the second sub-tooth 5153 is meshed with the sixth sub-tooth 5173; the third gear 517 is meshed with the fourth gear 518, the fifth sub-tooth 5172 is meshed with the seventh sub-tooth 5182, and the sixth sub-tooth 5173 is meshed with the eighth sub-tooth 5183; the fourth gear 518 is meshed with the second gear 516, the seventh sub-tooth 5182 is meshed with the third sub-tooth 5162, and the eighth sub-tooth 5183 is meshed with the fourth sub-tooth 5163. When the first gear 515 rotates, the fifth sub-tooth 5172 is driven to move by the first sub-tooth 5152, and the sixth sub-tooth 5173 is driven to move by the second sub-tooth 5153, thereby driving the third gear 517 to rotate; when the third gear 517 rotates, the seventh sub-tooth 5182 is driven to move by the fifth sub-tooth 5172, and the eighth sub-tooth 5183 is driven to move by the sixth sub-tooth 5173, thereby driving the fourth gear 518 to rotate; when the fourth gear 518 rotates, the third sub-tooth 5162 is driven to move by the seventh sub-tooth 5182, and the fourth sub-tooth 5163 is driven to move by the eighth sub-tooth 5183, thereby driving the second gear 516 to rotate, thereby realizing the synchronous rotation of the first gear 515, the second gear 516, the third gear 517 and the fourth gear 518.

[0160] It should be noted that when the first gear 515 drives the third gear 517 to rotate, the forces acting on the first sub-tooth 5152 and the second sub-tooth 5153 in the Y direction are opposite in direction, so they can offset each other, reducing the axial force of the first gear 515. Similarly, the forces acting on the third sub-tooth 5162 and the fourth sub-tooth 5163 in the second gear 516 in the Y direction can also offset each other, reducing the axial force of the second gear 516. The forces acting on the fifth sub-tooth 5172 and the sixth sub-tooth 5173 in the third gear 517 in the Y direction can also offset each other, so as to reduce the axial force of the third gear 517. The forces acting on the seventh sub-tooth 5182 and the eighth sub-tooth 5183 in the fourth gear 518 in the Y direction can also offset each other, so as to reduce the axial force of the fourth gear 518.

[0161] In this embodiment, by setting the teeth of the synchronous gear 513 to a "V" shape, the axial force when the synchronous gear 513 rotates can be reduced, thereby further increasing the stability of the rotation of the synchronous gear 513, improving the smoothness of the transmission of the synchronous component 2, and the stability of the rotation of the rotating mechanism 100.

[0162] Please refer to FIG. 17 , which is a schematic diagram of a portion of the structure of the first synchronization component 201 shown in FIG. 14 .

[0163] The first synchronous swing arm 53 includes a first synchronous swing body 531, a first synchronous shaft seat 532, a first hinge body 533 and a third hinge body 534. The first synchronous shaft seat 532 is connected to one end of the first synchronous swing body 531. A first rotating hole 535 is provided in the first synchronous shaft seat 532, and the extension direction of the first rotating hole 535 is parallel to the Y direction. The first synchronous shaft seat 532 is provided with a first receiving notch 536. The first receiving notch 536 is located in the middle of the first synchronous shaft seat 532. The first hinge body 533 and the third hinge body 534 are both fixedly connected to the first synchronous shaft seat 532 and face the first receiving notch 536. The first hinge body 533 includes a protrusion and a plurality of recesses (not marked in the figure), and the plurality of protrusions and the plurality of recesses are alternately arranged along the circumference of the first rotating hole 535. The structure of the third hinge body 534 is the same as that of the first hinge body 533.

[0164] The second synchronous swing arm 54 has the same structure as the first synchronous swing arm 53, and the second synchronous swing arm 54 and the first synchronous swing arm 53 are symmetrical structures. The second synchronous swing arm 54 includes a second synchronous swing body 541, a second synchronous shaft seat 542, a second hinge 543 and a fourth hinge 544. A second rotating hole 545 is provided in the second synchronous shaft seat 542, and the extending direction of the second rotating hole 545 is parallel to the Y direction. The second synchronous shaft seat 542 is provided with a second receiving notch 546. The second hinge 543 and the fourth hinge 544 are both fixedly connected to the second synchronous shaft seat 542 and face the second receiving notch 546. The structures of the second hinge 543 and the fourth hinge 544 are the same as those of the first hinge 533.

[0165] The damping member 52 includes a first baffle 521, a second baffle 522 and a damping spring 523. The first baffle 521 includes a first body 524, a first hinge seat 525 and a second hinge seat 526. The first hinge seat 525 and the second hinge seat 526 are spaced apart on the surface of the first body 524, and the structure of the first hinge seat 525 matches the structure of the first hinge body 533, and the structure of the second hinge seat 526 matches the structure of the second hinge body 543. The structure of the second baffle 522 is the same as that of the first baffle 521. The second baffle 522 includes a second body 527, a third hinge seat 528 and a fourth hinge seat 529. The structure of the third hinge seat 528 matches the structure of the third hinge body 534, and the structure of the fourth hinge seat 529 matches the structure of the fourth hinge body 544. The first baffle plate 521 and the second baffle plate 522 are spaced apart and arranged in parallel along the Y direction, wherein the surface of the first baffle plate 521 facing away from the first hinge seat 525 is opposite to the surface of the second baffle plate 522 facing away from the third hinge seat 528. In this embodiment, there are four damping springs 523. In other embodiments, there may be two, three or more than five damping springs 523. The damping spring 523 is installed between the first baffle plate 521 and the second baffle plate 522, and is fixedly connected to the first baffle plate 521 and the second baffle plate 522.

[0166] Please refer to FIG. 18 and FIG. 19 . FIG. 18 is a schematic diagram of a partial structure of the rotating mechanism 100 shown in FIG. 5 in a flattened state. FIG. 19 is a schematic diagram of a partial structure of the rotating mechanism 100 shown in FIG. 5 in a folded state.

[0167] The first synchronous assembly 201 is installed on the fixed base 10, the first synchronous swing arm 53 and the second synchronous swing arm 54 are respectively located on opposite sides of the fixed base 10 in the X direction, and the first synchronous swing body 531 is installed on the third slide groove 231 of the third fixed plate 23 in the second rotating assembly 102, and the first synchronous swing body 531 can slide along the third slide groove 231, and the second synchronous swing body 541 is installed on the fourth slide groove 241 of the fourth fixed plate 24, and the second synchronous swing body 541 can slide along the fourth slide groove 241. The damping member 52 is installed in the fixed base 10 and is located between the first synchronous swing arm 53 and the second synchronous swing arm 54. The first hinge body 533 is hinged to the first hinge seat 525, the third hinge body 534 is hinged to the third hinge seat 528, the second hinge body 543 is hinged to the second hinge seat 526, and the fourth hinge body 544 is hinged to the fourth hinge seat 529. The synchronizer 51 is mounted on the fixed base 10, and the first mounting plate 511 and the second mounting plate 512 are fixedly connected to the fixed base 10. The first rotating rod 5141 is located in the first rotating hole 535 and is fixedly connected to the first synchronous shaft seat 532, and the second rotating rod 5142 is located in the second rotating hole 545 and is fixedly connected to the second synchronous shaft seat 542.

[0168] When the third fixed plate 23 rotates, the first synchronous swing arm 53 is driven to rotate, and the first synchronous swing body 531 of the first synchronous swing arm 53 slides and rotates in the third slide groove 231. When the first synchronous swing arm 53 rotates, the first rotating rod 5141 is driven to rotate synchronously, thereby driving the first gear 515 to rotate. When the first gear 515 rotates, the intermediate gear 519 is driven to rotate, thereby driving the second gear 516 to rotate. When the second gear 516 rotates, the second rotating rod 5142 is driven to rotate, thereby driving the second synchronous swing arm 54 to rotate, and driving the fourth fixed plate 24 to rotate, while causing the second synchronous swing body 541 to slide and rotate in the fourth slide groove 241, thereby realizing the synchronous rotation of the first synchronous swing arm 53 and the second synchronous swing arm 54, and the synchronous rotation of the third fixed plate 23 and the fourth fixed plate 24.

[0169] At the same time, when the first synchronous swing arm 53 rotates, it drives the first hinge 533 and the third hinge 534 to rotate synchronously. When the first hinge 533 rotates, it repeatedly pushes the first hinge seat 525 to move along the Y direction and drives the first baffle 521 to move. When the third hinge 534 rotates, it repeatedly pushes the third hinge seat 528 to move along the Y direction and drives the second baffle 522 to move. Among them, the movement directions of the first baffle 521 and the second baffle 522 are opposite, thereby compressing the damping spring 523, so that the damping spring 523 generates elastic force. The elastic restoring force of the damping spring 523 acts on the first hinge seat 525 and the third hinge seat 528, so that the first hinge seat 525 squeezes the first hinge 533, and the third hinge seat 528 squeezes the third hinge 534, thereby providing a damping force for the rotation of the first synchronous swing arm 53, and the damping force of the first synchronous swing arm 53 acts on the first housing 210 through the third fixing plate 23, thereby providing a damping feel for the user.

[0170] When the second synchronous swing arm 54 rotates, it drives the second hinge 543 and the fourth hinge 544 to rotate synchronously. When the second hinge 543 rotates, it repeatedly pushes the second hinge seat 526 to move along the Y direction and drives the first baffle 521 to move. When the fourth hinge 544 rotates, it repeatedly pushes the fourth hinge seat 529 to move along the Y direction and drives the second baffle 522 to move. Among them, the movement directions of the first baffle 521 and the second baffle 522 are opposite, thereby compressing the damping spring 523, so that the damping spring 523 generates elastic force. The elastic restoring force of the damping spring 523 acts on the second hinge seat 526 and the fourth hinge seat 529, so that the second hinge seat 526 squeezes the second hinge 543, and the fourth hinge seat 529 squeezes the fourth hinge 544, thereby providing a damping force for the rotation of the second synchronous swing arm 54, and the damping force of the second synchronous swing arm 54 acts on the second housing 220 through the fourth fixing plate 24, thereby providing a damping feel for the user.

[0171] The first synchronous swing arm 53 and the second synchronous swing arm 54 rotate in opposite directions. For example, when the rotating mechanism 100 is switched from the flattened state to the folded state, the third fixed plate 23, the first synchronous swing arm 53 and the first rotating rod 5141 rotate clockwise, and the fourth fixed plate 24, the second synchronous swing arm 54 and the second rotating rod 5142 rotate counterclockwise. When the rotating mechanism 100 is switched from the folded state to the flattened state, the third fixed plate 23, the first synchronous swing arm 53 and the first rotating rod 5141 rotate counterclockwise, and the fourth fixed plate 24, the second synchronous swing arm 54 and the second rotating rod 5142 rotate clockwise.

[0172] In this embodiment, by providing a synchronous member 51, when the first synchronous swing arm 53 rotates, the second synchronous swing arm 54 can be driven to rotate by the synchronous member 51, so that the first synchronous swing arm 53 and the second synchronous swing arm 54 can be synchronously rotated, thereby realizing the synchronous rotation of the rotating mechanism 100 and the foldable electronic device 500. In addition, in this embodiment, by setting the synchronous gear 513 as a helical tooth, the overlap of the synchronous gear 513 is increased, so that the transmission stability of the synchronous assembly 2 and the stability of the rotation of the rotating mechanism 100 can be improved, and at the same time, the tooth root can be prevented from being broken, thereby improving the durability of the synchronous gear 513.

[0173] Moreover, in this embodiment, by providing a damping member 52, when the first synchronous swing arm 53 and the second synchronous swing arm 54 rotate relative to the fixed base 10, the damping member 52 always presses against the first synchronous swing arm 53 and the second synchronous swing arm 54 to generate a damping force, thereby providing a damping feel for the user and improving the user's experience.

[0174] The structure of the second synchronization component 202 is the same as that of the first synchronization component 201. The first synchronization swing arm 53 in the second synchronization component 202 is installed in the fifth slide slot 232, and the second synchronization swing arm 54 is installed in the sixth slide slot 242. The basic structure of each component in the second synchronization component 202, the connection relationship between the components, and the connection relationship between the components and the components outside the component can all refer to the relevant design of the first synchronization component 201, and will not be repeated here.

[0175] Please refer to Figures 20 and 21. Figure 20 is a schematic diagram of a partial exploded structure of the pressure plate assembly 3 in the rotating mechanism 100 shown in Figure 6, and Figure 21 is a schematic diagram of the exploded structure of the pressure plate assembly 3 shown in Figure 20 at another angle.

[0176] The pressure plate assembly 3 includes a first pressure plate 61, a second pressure plate 62, a first pressure plate swing arm 63, and a second pressure plate swing arm 64. The first pressure plate 61 is rotatably and slidably connected to the first fixed plate 21 of the first rotating assembly 101, the first fixed plate 21A of the second rotating assembly 102, the first fixed plate 21C of the third rotating assembly 103, and the first fixed plate 21D of the fourth rotating assembly 104. The second pressure plate 62 is rotatably and slidably connected to the second fixed plate 22 of the first rotating assembly 101, the second fixed plate 22A of the second rotating assembly 102, the second fixed plate 22B of the third rotating assembly 103, and the second fixed plate 22C of the fourth rotating assembly 104. The first pressure plate swing arm 63 is slidably connected to the first pressure plate 61, and is rotatably and slidably connected to the fixed base 10. The second pressure plate swing arm 64 is slidably connected to the second pressure plate 62, and is rotatably and slidably connected to the fixed base 10.

[0177] The first pressing plate 61 includes a first pressing plate body 611 and a first slider 612. The first pressing plate body 611 is a long strip plate-shaped structure. The first pressing plate body 611 is provided with a first pressing plate chute 613, which penetrates the first pressing plate body 611 in the width direction of the first pressing plate body 611. In this embodiment, there are four first pressing plate chute 613, and the four first pressing plate chute 613 are arranged in sequence along the Y direction. In other embodiments, the first pressing plate chute 613 can also be one, two, three or more than five. The first pressing plate chute 613 is used to install the first pressing plate swing arm 63. The first slider 612 is provided on the bottom surface of the first pressing plate body 611 and is fixedly connected to the first pressing plate body 611. In this embodiment, there are multiple first sliders 612, and the multiple first sliders 612 are arranged in sequence along the Y direction. Each first slider 612 extends in an arc shape from the bottom surface of the first pressing plate body 611 toward a direction away from the top surface. The structure of the first sliding block 612 matches the structure of the first guide groove 215 .

[0178] The structure of the second pressing plate 62 is substantially the same as that of the first pressing plate 61. The second pressing plate 62 includes a second pressing plate body 621 and a second slider 622. The second pressing plate body 621 is provided with a second pressing plate slide 623. The second pressing plate slide 623 is used to install the second pressing plate swing arm 64. The second slider 622 is provided on the bottom surface of the second pressing plate body 621 and extends in an arc shape from the bottom surface of the second pressing plate body 621 in a direction away from the top surface. The structure of the second slider 622 is adapted to the structure of the second guide groove 225.

[0179] The first pressure plate swing arm 63 includes a first pressure plate swing body 631 and a first pressure plate rotating body 632. The first pressure plate rotating body 632 is an arc-shaped plate-like structure. The first pressure plate rotating body 632 includes a first rotating part 6321 and two second rotating parts 6322. The two second rotating parts 6322 are respectively located on opposite sides of the first pressure plate rotating body 632 in the X direction, and the first rotating part 6321 is located between the two second rotating parts 6322. The structure of the first pressure plate rotating body 632 matches the structure of the third rotating groove 125, the structure of the first rotating part 6321 matches the structure of the fifth slide rail 1251, and the structure of the second rotating part 6322 matches the structure of the sixth slide rail 1252. The first pressure plate swing body 631 is a plate-like structure, and one end of the first pressure plate swing body 631 is fixedly connected to the first pressure plate rotating body 632. The first pressure plate swing arm 63 is installed in the third rotating groove 125, and is used to rotate and slide with the fixed base 10, and is slidably connected with the first fixed plate 21.

[0180] The second platen swing arm 64 has the same structure as the first platen swing arm 63. The second platen swing arm 64 includes a second platen rotating body 641 and a second platen swinging body 642. The second platen rotating body 641 is provided with a third rotating portion 6421 and two fourth rotating portions 6422. The structure of the second platen rotating body 641 is the same as that of the first platen rotating body 632, and the structure of the second platen swinging body 642 is the same as that of the first platen swinging body 631. The second platen swing arm 64 is mounted on the fourth rotating groove 126 of the fixed base 10, and is used for rotationally and slidably connecting with the fixed base 10, and is slidably connected with the second fixed plate 22.

[0181] In this embodiment, there are four first platen swing arms 63 and four second platen swing arms 64. In other embodiments, there may be one, two, three or more first platen swing arms 63 and four second platen swing arms 64.

[0182] In order to more clearly understand the assembly relationship between the pressure plate assembly 3 and other components, please refer to Figures 5 and 6. The first pressure plate 61 and the first pressure plate swing arm 63 are located on the same side of the fixed base 10 in the X direction, and the four first pressure plate swing arms 63 are arranged at intervals along the Y direction. The first pressure plate rotating body 632 is installed in the third rotating groove 125 of the fixed base 10, the first rotating part 6321 is installed on the fifth slide rail 1251, and the second rotating part 6322 is installed on the sixth slide rail 1252. The first pressure plate rotating body 632 can slide and rotate along the fifth slide rail 1251 and the sixth slide rail 1252 in the third rotating groove 125. The end of the first pressure plate swing body 631 facing away from the first pressure plate rotating body 632 is installed in the first pressure plate slide groove 613, and each first pressure plate swing body 631 can slide in the corresponding first pressure plate slide groove 613. The first pressure plate 61 is connected to the first fixed plate 21 in a sliding and rotating manner. The first sliding block 612 of the first pressing plate 61 is installed in the first guide groove 215 of the first fixing plate 21 , and each first sliding block 612 can slide in the corresponding first guide groove 215 .

[0183] When the first housing 210 rotates, the first fixed plate 21 is driven to rotate relative to the fixed base 10, so as to drive the first pressure plate 61 to rotate relative to the fixed base 10, and the first slider 612 slides in an arc shape in the corresponding first guide groove 215, thereby driving the first pressure plate 61 to slide in an arc shape relative to the first fixed plate 21. In addition, when the first pressure plate 61 rotates, the first pressure plate swinging body 631 is driven to rotate, thereby driving the first pressure plate rotating body 632 to slide and rotate in the first slide groove 214, thereby realizing the rotation of the first pressure plate 61 and the first pressure plate swing arm 63 relative to the fixed base 10.

[0184] The second pressing plate 62 and the second pressing plate swing arm 64 are located on the other side of the fixed base 10 in the X direction, and the four second pressing plate swing arms 64 are arranged at intervals along the Y direction. The second pressing plate rotating body 641 is installed in the fourth rotating groove 126 of the fixed base 10, the third rotating part 6421 is installed on the seventh slide rail 1261, and the fourth rotating part 6422 is installed on the eighth slide rail 1262. The second pressing plate rotating body 641 can slide and rotate along the seventh slide rail 1261 and the eighth slide rail 1262 in the second rotating groove 124. The end of the second pressing plate swing body 642 facing away from the second pressing plate rotating body 641 is installed in the second pressing plate slide groove 623, and each second pressing plate swing body 642 can slide in the corresponding second pressing plate slide groove 623. The second pressing plate 62 is connected to the second fixed plate 22 in a sliding and rotating manner. The second sliding blocks 622 of the second pressing plate 62 are installed in the second guide grooves 225 of the second fixing plate 22 , and each second sliding block 622 can slide in the corresponding second guide groove 225 .

[0185] When the second housing 220 rotates, the second fixed plate 22 is driven to rotate relative to the fixed base 10, so as to drive the second pressure plate 62 to rotate relative to the fixed base 10, and the second slider 622 slides in an arc shape in the corresponding second guide groove 225, thereby driving the second pressure plate 62 to slide in an arc shape relative to the second fixed plate 22. In addition, when the second pressure plate 62 rotates, the second pressure plate swinging body 642 is driven to rotate, thereby driving the second pressure plate rotating body 641 to slide and rotate in the second slide groove 224, thereby realizing the rotation of the second pressure plate 62 and the second pressure plate swing arm 64 relative to the fixed base 10.

[0186] The first pressing plate 61 and the second pressing plate 62 are both arranged opposite to the display screen 300. The first pressing plate 61 and the second pressing plate 62 jointly support the display screen 300, thereby increasing the stability of the connection of the display screen 300 to ensure good display of the display screen 300.

[0187] In this embodiment, the first housing 210 drives the first fixing plate 21 to rotate, thereby driving the first pressing plate 61 to rotate, and the second housing 220 drives the second fixing plate 22 to rotate, thereby driving the second pressing plate 62 to rotate, thereby switching the foldable electronic device 500 between the folded state and the flattened state to achieve the folding and unfolding of the display screen 300. In addition, in this embodiment, the first pressing plate 61 can slide in an arc shape relative to the first fixing plate 21, and the second pressing plate 62 can slide in an arc shape relative to the second fixing plate 22, so that the angle between the first pressing plate 61 and the second pressing plate 62 can be adjusted, thereby adapting to the folding angle of the foldable part 330 of the display screen 300, so as to avoid the first pressing plate 61 and the second pressing plate 62 from squeezing the display screen 300 when the rotating mechanism 100 is in the folded state. That is to say, when the rotating mechanism 100 is in a folded state, the angle between the first fixed plate 21 and the second fixed plate 22 is different from the angle between the first pressing plate 61 and the second pressing plate 62, and the angle between the first pressing plate 61 and the second pressing plate 62 can be adjusted according to the bending angle of the display screen 300 to adapt to the bending of the display screen 300.

[0188] In this embodiment, by providing a first pressure plate swing arm 63, the first pressure plate 61 drives the first pressure plate swing arm 63 to rotate, thereby realizing the rotation of the first pressure plate 61 relative to the fixed base 10, thereby improving the stability of the rotation of the first pressure plate 61. By providing a second pressure plate swing arm 64, the second pressure plate 62 drives the second pressure plate swing arm 64 to rotate, thereby realizing the rotation of the second pressure plate 62 relative to the fixed base 10, thereby improving the stability of the rotation of the second pressure plate 62.

[0189] Please refer to FIG. 5 and FIG. 22 . FIG. 22 is a cross-sectional view of the rotating mechanism 100 shown in FIG. 5 in a folded state.

[0190] The flexible support member 70 is a long strip-shaped plate-like structure, and the flexible support member 70 can be bent along the Y direction. The flexible support member 70 is installed on the fixed base 10 and is arranged opposite to the upper shell 12 in the Z direction. When the rotating mechanism 100 is in a flattened state, the flexible support member 70, the first pressure plate 61 and the second pressure plate 62 jointly support the display screen 300 to ensure a good display of the display screen 300. When the rotating mechanism 100 is in a folded state, the foldable portion 330 of the display screen 300 is bent and convex outward toward the flexible support member 70, and the flexible support member 70 is bent to form a water drop-shaped structure, and the middle part of the flexible support member 70 sinks toward the fixed base 10, and forms an avoidance space to avoid the display screen 300, so as to prevent the flexible support member 70 from squeezing the display screen 300 and causing damage to the display screen 300.

[0191] Please refer to FIG. 23 and FIG. 24 . FIG. 23 is an enlarged structural schematic diagram of the floating plate 80 in the rotating mechanism 100 shown in FIG. 6 , and FIG. 24 is a partial structural schematic diagram of the rotating mechanism 100 shown in FIG. 5 .

[0192] The floating plate 80 is a long strip plate-like structure. The floating plate 80 includes a first side 81 and a second side 82. The first side 81 and the second side 82 are arranged opposite to each other and are respectively located on opposite sides of the floating plate 80 in the X direction. The floating plate 80 is provided with a first mounting groove 83, a second mounting groove 84, a third mounting groove 85 and a fourth mounting groove 86. The first mounting groove 83 and the third mounting groove 85 are arranged on the first side 81, and the second mounting groove 84 and the fourth mounting groove 86 are arranged on the second side 82. The first mounting groove 83 and the second mounting groove 84 are arranged opposite to each other in the X direction, and the third mounting groove 85 and the fourth mounting groove 86 are arranged opposite to each other in the X direction. The first mounting groove 83, the second mounting groove 84, the third mounting groove 85 and the fourth mounting groove 86 are U-shaped through grooves. Taking the first mounting groove 83 as an example, the first mounting groove 83 includes two groove walls, which are arranged opposite to each other to form a U-shaped through groove, and the groove openings are all facing away from the center line position of the length direction of the floating plate 80.

[0193] The floating plate 80 is located between the fixed base 10 and the flexible support 70, and is installed between the first sub-shell 12A and the second sub-shell 12B. The first sub-shell 12A and the second sub-shell 12B are also used for the FPC (flexible circuit board) of the foldable electronic device 500 to pass through. The FPC here refers to a structure for electrically connecting the electronic device located in the first shell 210 and the electronic device located in the second shell 220 of the foldable electronic device 500. In other words, the floating plate 80 is installed on the fixed base 10 and is opposite to the FPC line position. Among them, the first extension 1272 of the first rotating shaft 127 in the first sub-shell 12A is located in the first mounting groove 83, the second extension 1282 of the second rotating shaft 128 in the first sub-shell 12A is located in the second mounting groove 84, the first rotating shaft 127 in the second sub-shell 12B is located in the third mounting groove 85, and the second rotating shaft 128 in the second sub-shell 12B is located in the second mounting groove 84.

[0194] Please refer to FIG. 22 and FIG. 25 together. FIG. 25 is a schematic cross-sectional structure diagram of the rotating mechanism 100 shown in FIG. 5 in a flattened state.

[0195] When the rotating mechanism 100 rotates from the flattened state to the folded state, the first auxiliary swing arm 41 and the second auxiliary swing arm 42 rotate in a direction approaching each other. The first auxiliary swing arm 41 drives the first rotating shaft 127 to rotate, so as to drive the first extension part 1272 to rotate in a direction close to the lower housing 11, and the second auxiliary swing arm 42 drives the second rotating shaft 128 to rotate, so as to drive the second extension part 1282 to rotate in a direction toward the lower housing 11. The first extension part 1272 and the second extension part 1282 rotate in a direction toward the lower housing 11, thereby driving the floating plate 80 to move in a negative direction of the Z axis, that is, driving the floating plate 80 to move in a direction away from the display screen 300, thereby providing an avoidance space for the bending of the flexible support member 70 and the display screen 300, so as to prevent the floating plate 80 from squeezing the flexible support member 70 and the display screen 300 and causing damage to the display screen 300.

[0196] When the rotating mechanism 100 rotates from the folded state to the flattened state, the first auxiliary swing arm 41 and the second auxiliary swing arm 42 rotate in directions away from each other. The first auxiliary swing arm 41 drives the first rotating shaft 127 to rotate, so as to drive the first extension part 1272 to rotate in a direction away from the lower housing 11, and the second auxiliary swing arm 42 drives the second rotating shaft 128 to rotate, so as to drive the second extension part 1282 to rotate in a direction away from the lower housing 11. The first extension part 1272 and the second extension part 1282 rotate in a direction away from the lower housing 11, thereby driving the floating plate 80 to move in the positive direction of the Z axis, that is, driving the floating plate 80 to move in a direction close to the display screen 300, so that the rotating mechanism 100 is in the flattened state.

[0197] When the rotating mechanism 100 is in the flattened state, the first auxiliary swing arm 41 and the second auxiliary swing arm 42 in the first rotating assembly 101 are unfolded relative to the fixed base 10, and the first auxiliary swing arm 41 and the second auxiliary swing arm 42 in the second rotating assembly 102 are unfolded relative to the fixed base 10. The floating plate 80 and the flexible support member 70 jointly support the display screen 300.

[0198] In this embodiment, by providing a floating plate 80 at the FPC wire position of the rotating mechanism 100, the FPC wire can be protected to prevent the flexible support member 70 and the display screen 300 from squeezing the FPC wire when the rotating mechanism 100 is in the folded state, thereby preventing damage to the FPC wire. In addition, when the rotating mechanism 100 is in the flattened state, the floating plate 80 and the flexible support member 70 jointly support the display screen 300. When the rotating mechanism 100 is in the folded state, the floating plate 80 sinks to avoid the flexible support member 70 and the display screen 300, thereby preventing squeezing of the display screen 300.

[0199] Please refer to FIG. 26 , which is a schematic structural diagram of the rotating mechanism 100 shown in FIG. 5 in a folded state.

[0200] When the rotating mechanism 100 is in the folded state, the foldable portion 330 of the display screen 300 is located inside the rotating mechanism 100. Specifically, the foldable portion 330 is located in the avoidance space. Exemplarily, the avoidance space is roughly in the shape of a "water drop". At this time, the rotating mechanism 100 can avoid the R angle formed when the foldable portion 330 is bent, so that the foldable portion 330 will not bend at a large angle, avoiding the display screen 300 from having creases and other undesirable scenes, which helps to extend the service life of the display screen 300.

[0201] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A rotating mechanism, characterized in that: include: A fixed base, a first synchronous swing arm, a second synchronous swing arm and a synchronous gear; the synchronous gear includes a first gear, a second gear and an intermediate gear, the first gear, the intermediate gear and the second gear are all helical gears, the first gear, the intermediate gear and the second gear are arranged side by side and in parallel, the intermediate gear is located between the first gear and the second gear, and meshes with the first gear and the second gear; the first synchronous swing arm is fixedly connected to the first gear, and the second synchronous swing arm is fixedly connected to the second gear; the synchronous gear is installed in the fixed base and is rotatably connected to the fixed base, the first synchronous swing arm and the second synchronous swing arm are respectively located on opposite sides of the fixed base in the width direction, the first synchronous swing arm and the second synchronous swing arm have opposite rotation directions, and the first gear and the second gear have opposite rotation directions. The rotating mechanism according to claim 1, characterized in that The rotating mechanism includes a folded state and a flattened state. When the rotating mechanism is in the flattened state, the first synchronous swing arm is unfolded relative to the second synchronous swing arm. When the first synchronous swing arm rotates toward the direction close to the fixed base, it drives the first gear to rotate, thereby driving the second gear to rotate, thereby driving the second synchronous swing arm to rotate toward the direction close to the first synchronous swing arm, so that the first synchronous swing arm is folded relative to the second synchronous swing arm, and the rotating mechanism is in the folded state. The rotating mechanism according to claim 1 or 2, characterized in that: The overlap degree between the intermediate gear and the first gear is greater than 1.2, and the overlap degree between the intermediate gear and the second gear is greater than 1.

2. The rotating mechanism according to any one of claims 1 to 3, characterized in that: The intermediate gear includes a third gear and a fourth gear, both of which are helical gears. Both of the third gear and the fourth gear are arranged between the first gear and the second gear, and the third gear is meshed with the first gear, and the fourth gear is meshed with the second gear and the third gear. The rotating mechanism according to claim 4 is characterized in that: The overlap between the third gear and the fourth gear is greater than 1.

2. The rotating mechanism according to claim 4 or 5, characterized in that: The first gear includes a first tooth, the second gear includes a second tooth, the third gear includes a third tooth, and the fourth gear includes a fourth tooth; the first tooth, the second tooth, the third tooth and the fourth tooth are all spiral, and the spiral directions of the first tooth and the second tooth are opposite, and the spiral directions of the third gear and the fourth gear are opposite. The rotating mechanism according to claim 6, characterized in that The helix angles of the first tooth, the second tooth, the third tooth and the fourth tooth are all between 15° and 45°. The rotating mechanism according to claim 4 or 5, characterized in that: The first gear includes a first tooth, the second gear includes a second tooth, the third gear includes a third tooth, and the fourth gear includes a fourth tooth; the first tooth, the second tooth, the third tooth and the fourth tooth are all "V"-shaped. The rotating mechanism according to claim 8, characterized in that The first tooth includes a first sub-tooth and a second sub-tooth, both of which are helical teeth, and the first sub-tooth is fixedly connected to the second sub-tooth along the axial direction of the first gear; the second tooth includes a third sub-tooth and a fourth sub-tooth, both of which are helical teeth, and the third sub-tooth is fixedly connected to the fourth sub-tooth along the axial direction of the second gear; the third tooth includes a fifth sub-tooth and a sixth sub-tooth, both of which are helical teeth, and the fifth sub-tooth is fixedly connected to the sixth sub-tooth along the axial direction of the third gear; the fourth tooth includes a seventh sub-tooth and an eighth sub-tooth, both of which are helical teeth, and the seventh sub-tooth is fixedly connected to the eighth sub-tooth along the axial direction of the fourth gear; the first sub-tooth is meshed with the fifth sub-tooth, the fifth sub-tooth is meshed with the seventh sub-tooth, and the seventh sub-tooth is meshed with the third sub-tooth; the second sub-tooth is meshed with the seventh sub-tooth, the sixth sub-tooth is meshed with the eighth sub-tooth, and the eighth sub-tooth is meshed with the fourth sub-tooth. The rotating mechanism according to claim 9 is characterized in that: The spiral directions of the first sub-tooth and the fifth sub-tooth are opposite, the spiral directions of the fifth sub-tooth and the seventh sub-tooth are opposite, the spiral directions of the seventh sub-tooth and the third sub-tooth are opposite, and the spiral angles of the first sub-tooth, the fifth sub-tooth, the seventh sub-tooth and the third sub-tooth are all 15° to 45°. The rotating mechanism according to claim 8, characterized in that The overlap degree between the first gear and the third gear is greater than 1.2, the overlap degree between the third gear and the fourth gear is greater than 1.2, and the overlap degree between the fourth gear and the second gear is greater than 1.

2. The rotating mechanism according to any one of claims 1 to 11, characterized in that: The rotating mechanism also includes a damping member, which includes a damping spring, a first hinge seat and a second hinge seat. The damping member is installed on the fixed base, and the first hinge seat and the second hinge seat are both fixedly connected to the damping spring; the first synchronous swing arm includes a first hinge body, which is hinged to the first hinge seat, and the second synchronous swing arm includes a second hinge body, which is hinged to the second hinge seat; when the first synchronous swing arm rotates relative to the fixed base, the first hinge body abuts against the first hinge seat, and when the second synchronous swing arm rotates relative to the fixed base, the second hinge body abuts against the second hinge seat, and the first hinge seat and the second hinge seat jointly compress the damping spring and cause the damping spring to generate elastic force. The rotating mechanism according to any one of claims 1 to 12, characterized in that: The rotating mechanism includes a first fixed plate and a second fixed plate, the first fixed plate and the second fixed plate are respectively located on opposite sides of the fixed base in the width direction, and the first synchronous swing arm is slidably connected to the first fixed plate, and the second fixed plate is slidably connected to the second synchronous swing arm. The rotating mechanism according to claim 13, characterized in that The fixed base is provided with a first rotation groove and a second rotation groove, and the first rotation groove and the second rotation groove are arranged opposite to each other; the rotation mechanism includes a first main swing arm and a second main swing arm, the first main swing arm is installed in the first rotation groove, and can slide and rotate along the first rotation groove, and the first main swing arm is rotationally connected to the first fixed plate; The second main swing arm is installed in the second rotation groove and can slide and rotate along the second rotation groove, and the second main swing arm is rotationally connected to the second fixing plate. The rotating mechanism according to claim 14, characterized in that: The first main swing arm includes a first rotating body and a first swinging body, the first rotating body is fixedly connected to the first swinging body, the first rotating body includes a first sliding part and two second sliding parts, and the two second sliding parts are connected to the opposite sides of the first sliding part; the first rotating groove includes a first slide rail and two second slide rails, and the two second slide rails are respectively located on the opposite sides of the first slide rail and are arranged side by side with the first slide rail along the length direction of the fixed base; the first rotating body is installed in the first rotating groove, the first sliding part is installed on the first slide rail, and one second sliding part is installed on one second slide rail. The rotating mechanism according to claim 15, characterized in that A second slide rail includes a slide rail bottom wall and a protrusion, the protrusion is connected to the side wall of the first rotating groove and is arranged relative to the slide rail bottom wall. The bottom wall of the first rotating groove is also provided with a first hollow portion, the first hollow portion passes through the bottom wall of the first rotating groove and is arranged relative to the protrusion; the second sliding portion is located between the slide rail bottom wall and the protrusion. The rotating mechanism according to any one of claims 13 to 16, characterized in that: The fixed base is also equipped with a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged opposite to and parallel to each other, and are rotatably connected to the fixed base, and the extension directions of the first rotating shaft and the second rotating shaft are parallel to the length direction of the fixed base; the rotating mechanism includes a first auxiliary swing arm and a second auxiliary swing arm, the first auxiliary swing arm is fixedly connected to the first rotating shaft and is slidably connected to the first fixed plate; the second auxiliary swing arm is fixedly connected to the second rotating shaft and is slidably connected to the second fixed plate. The rotating mechanism according to claim 17, characterized in that: The rotating mechanism also includes a floating plate, which is installed on the fixed base and is rotatably connected to the first rotating shaft and the second rotating shaft; when the first auxiliary swing arm rotates relative to the fixed base, it drives the first rotating shaft to rotate, and when the second auxiliary swing arm rotates relative to the fixed base, it drives the second rotating shaft to rotate. The first rotating shaft and the second rotating shaft rotate to drive the floating plate to move along the thickness direction of the fixed base. The rotating mechanism according to claim 18, characterized in that The first rotating shaft comprises a first fixing portion and a first extending portion, the axis of the first fixing portion is parallel to the axis of the first extending portion and are arranged at intervals; the second rotating shaft comprises a second fixing portion and a second extending portion, the axis of the second fixing portion is parallel to the axis of the second extending portion and are arranged at intervals; the floating plate is provided with a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove are arranged at intervals; the first extending portion is located in the first mounting groove, and the second extending portion is located in the second mounting groove; when the first auxiliary swing arm and the second auxiliary swing arm rotate in a direction approaching each other, the first extending portion and the second extending portion drive the floating plate to move toward the fixed base; When the first auxiliary swing arm and the second auxiliary swing arm rotate in directions away from each other, the first extension portion and the second extension portion drive the floating plate to move in a direction away from the fixed base. The rotating mechanism according to any one of claims 13 to 19, characterized in that: The rotating mechanism also includes a first pressing plate and a second pressing plate. The first pressing plate is slidably connected to the first fixed plate. When the first fixed plate rotates relative to the fixed base, the first pressing plate can be driven to rotate relative to the fixed base; the second pressing plate is slidably connected to the second fixed plate. When the second pressing plate rotates relative to the fixed base, the second pressing plate can be driven to rotate relative to the fixed base. The rotating mechanism according to claim 20, characterized in that The fixed base is also provided with a third rotating groove and a fourth rotating groove, and the third rotating groove is arranged opposite to the fourth rotating groove; the rotating mechanism also includes a first pressure plate swing arm and a second pressure plate swing arm, the first pressure plate swing arm is installed in the third rotating groove, and can slide and rotate along the third rotating groove, and the first pressure plate swing arm is slidably connected to the first pressure plate; the second pressure plate swing arm is installed in the fourth rotating groove, and can slide and rotate along the fourth rotating groove, and the second pressure plate swing arm is slidably connected to the second pressure plate. The rotating mechanism according to claim 2 is characterized in that: The fixed base also includes a flexible support member, which is installed on the fixed base. When the rotating mechanism is in a folded state, the flexible support member bends to form an escape space; when the rotating mechanism is in an unfolded state, the flexible support member unfolds. A foldable electronic device, characterized in that: It includes a first shell, a second shell, a display screen and a rotating mechanism as described in any one of claims 1 to 22, wherein the rotating mechanism is connected between the first shell and the second shell, and the display screen is installed on the first shell, the second shell and the rotating mechanism, and when the rotating mechanism rotates, the first shell and the second shell rotate relative to each other, thereby driving the display screen to bend or unfold.

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