CN218564166U - Rotating mechanism and foldable electronic equipment - Google Patents

Abstract

The present application provides a rotating mechanism and a foldable electronic device. The rotating mechanism includes a fixed base, a first synchronous swing arm, a second synchronous swing arm and a synchronous piece. The first gear and the second gear of the synchronous part are arranged in parallel and at intervals, the third gear and the fourth gear of the synchronous part are fixedly connected and parallel to the axial direction, and both are located between the first gear and the second gear, and the shaft of the third gear perpendicular to the axial direction of the first gear. The first gear meshes with the third gear, and one of the first gear and the third gear is a spur gear, and the other is a face gear. The second gear meshes with the fourth gear, and one of the second gear and the fourth gear is a spur gear, and the other is a face 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 rotation mechanism provided by the application can solve the technical problem of poor rotation stability of the existing rotation mechanism.

Description

Turning Mechanisms and Foldable Electronics

technical field

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

Background technique

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 bar machines to folding machines. The folding machine has a large screen in the open state, which fully satisfies the visual experience of consumers, and is small in size and easy to carry in the closed state. Most folding machines in the prior art realize synchronous movement through synchronous gears in the synchronous mechanism. However, the existing synchronous gears have poor rotation stability.

Utility model content

The present application provides a rotating mechanism and a foldable electronic device to solve the technical problem of poor rotation stability of the rotating mechanism in the prior art.

In a first aspect, the present application provides a rotating mechanism, including: a fixed base, a first synchronous swing arm, a second synchronous swing arm, and a synchronous member. The synchronous member includes a first gear, a second gear, a third gear and a fourth gear, the first gear and the second gear are arranged in parallel and at intervals, and the third gear is fixedly connected to the fourth gear and axially parallel. Both the third gear and the fourth gear are located between the first gear and the second gear, and the axis of the third gear is perpendicular to the axis of the first gear. The first gear meshes with the third gear, and one of the first gear and the third gear is a spur gear, and the other is a face gear. The second gear meshes with the fourth gear, and one of the second gear and the fourth gear is a spur gear, and the other is a face 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 element is installed in the fixed base, and is rotatably connected with 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 rotation direction of the first synchronous swing arm is opposite to that of the second synchronous swing arm, The rotation direction of the first gear is opposite to that of the second gear.

The rotating mechanism is applied to a foldable electronic device, and the foldable electronic device includes a first casing, a second casing and a display screen. The first housing is connected with the first synchronous swing arm, and the second housing is connected with the second synchronous swing arm. The rotating mechanism is located between the first casing and the second casing, and connects the first casing and the second casing in rotation. The rotation of the rotating mechanism can drive the first casing and the second casing to rotate relatively. The first housing and the second housing are also provided with accommodating grooves for accommodating electronic components such as processors, circuit boards, and camera modules of electronic equipment, as well as structural components.

When the rotating mechanism is in the 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 are rotated toward a direction close to 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.

In this embodiment, one of the first gear and the third gear meshing with each other is set as a spur gear and the other is a face gear, and the axes of the first gear and the third gear are vertical, so that the first gear drives the third gear to rotate , the acting forces on the first gear and the third gear are all parallel to the tangential direction; by setting one of the second gear and the fourth gear that mesh with each other as a spur gear and the other as a face gear, and the second gear and the fourth gear The axial direction of the gears is vertical, so that when the fourth gear drives the second gear to rotate, the force on the fourth gear and the fourth gear is parallel to the tangential direction. That is, the first gear, the second gear, the third gear and the fourth gear are not subjected to an axial force, so that the axial force of the first gear, the second gear, the third gear and the fourth gear can be reduced or even eliminated. Error, improve the transmission performance of the synchronous part, improve the rotational stability and reliability of the rotating mechanism, simplify the connection structure between the synchronous part and the fixed base, reduce the weight of the rotating mechanism, and realize the thinning of the foldable electronic device. At the same time, when designing the synchronous parts, there is no need to check the contact condition of the tooth surface, which can simplify the design process and save labor.

And, by setting one of the first gear and the third gear as a face gear, the coincidence degree of the first gear and the third gear can be improved, and one of the second gear and the fourth gear is set as a face gear, which can improve the degree of overlap between the first gear and the third gear. The coincidence degree of the second gear and the fourth gear can improve the load-carrying capacity of the gears, improve the stability of the transmission of the synchronous element, and further improve the rotation stability of the rotating mechanism and the foldable electronic device. In addition, both the spur gear and the face gear used in this embodiment can be standard gears, with simple structure, low maintenance cost and high interchangeability.

In a possible implementation manner, the rotating mechanism has a folded state and an unfolded state. Wherein, when the rotating mechanism is in the flattened state, the first synchronous swing arm and the second synchronous swing arm are relative to each other, and when the first synchronous swing arm rotates towards the fixed base , the first synchronous swing arm drives the first gear to rotate, the first gear drives the third gear to rotate, thus the third gear drives the fourth gear to rotate, and the fourth gear drives all The second gear rotates, and the second gear further drives the second synchronous swing arm to rotate in a direction close to the first synchronous swing arm, so that the rotating mechanism is in the folded state.

In this embodiment, the first synchronous swing arm and the second synchronous swing arm rotate synchronously through the synchronizing member, so as to realize the synchronous rotation of the rotating mechanism, thereby improving the convenience and reliability of the rotating mechanism, and improving the user experience.

In a possible implementation manner, the first gear is a spur gear, and the third gear is a face gear; the first gear includes a plurality of first teeth, and the first gear further includes a first outer peripheral surface, A plurality of the first teeth are arranged at intervals on the first outer peripheral surface; the third gear includes a plurality of third teeth, and the third gear also includes a third end surface, and the third teeth are arranged at intervals on the The third end surface, and the direction of the third tooth is opposite to that of the first tooth.

It should be noted that the first outer peripheral surface is an outer surface surrounding the axial direction of the first gear, and the third end surface refers to an axial end surface of the third gear. In this embodiment, the first gear is a spur gear, the third gear is a face gear, and the axial direction of the third gear is perpendicular to the axial direction of the first gear. The active force of the three teeth is along the tangential direction of the third gear, and the active force of the third tooth on the first tooth is along the tangential direction of the first gear. That is, neither the first gear nor the third gear is subjected to an axial force, thereby reducing or even eliminating the axial error between the first gear and the third gear, improving the transmission performance of the synchronous element, and improving the rotational stability of the rotating mechanism and reliability.

In a possible implementation manner, the second gear is a spur gear, and the fourth gear is a face gear; the second gear includes a plurality of second teeth, and the second gear further includes a second outer peripheral surface, A plurality of the second teeth are arranged at intervals on the second outer peripheral surface; the fourth gear includes a plurality of fourth teeth, and the fourth gear also includes a fourth end surface, and the fourth teeth are arranged at intervals on the The fourth end surface, and the direction of the fourth tooth is opposite to the direction of the second tooth.

It should be noted that the second outer peripheral surface is an outer surface surrounding the axial direction of the second gear, and the fourth end surface refers to an axial end surface of the fourth gear. In this embodiment, the second gear is a spur gear, the fourth gear is a face gear, and the axial direction of the second gear is perpendicular to the axial direction of the fourth gear. The active force of the second tooth is along the tangential direction of the second gear, and the active force of the second tooth on the fourth tooth is along the tangential direction of the fourth gear. That is, the second gear and the fourth gear are not subjected to axial force, so that the axial error between the second gear and the fourth gear can be reduced or even eliminated, the transmission performance of the synchronous parts can be further improved, and the rotation stability of the rotating mechanism can be improved. sex and reliability.

In a possible implementation manner, the first teeth and the third teeth are straight teeth, or helical teeth, or arc teeth. And, the second tooth and the fourth tooth are straight teeth, or helical teeth, or arc-shaped teeth.

In this embodiment, the shapes of the first tooth, the second tooth, the third tooth and the fourth tooth can be adjusted according to actual application scenarios and usage conditions, that is, the first gear, the second gear, the third gear and the fourth tooth The types of gears can be adjusted according to actual conditions. That is, the shapes of the spur gear and the face gear can be adjusted according to the actual situation, as long as the two gears meshing with each other cooperate with each other. The rotating mechanism provided by this embodiment has higher flexibility and saves cost.

In a possible implementation manner, the first gear is a face gear, and the third gear is a spur gear; the first gear includes a plurality of first teeth, and the first gear further includes a first end surface, and the first gear includes a plurality of first teeth. The first teeth are arranged at intervals on the first end surface; the third gear includes a plurality of third teeth, and the third gear also includes a third outer peripheral surface, and the third teeth are arranged at intervals on the first end surface. Three outer peripheral surfaces, and the direction of the third tooth is opposite to that of the first tooth.

It should be noted that the first end surface is an axial end surface of the first gear, and the first end surface is vertically connected to the first outer peripheral surface. The third outer peripheral surface is an outer surface surrounding the axial direction of the third gear, and the third outer peripheral surface is vertically connected to the third end surface. In this embodiment, the first gear is a face gear, the third gear is a spur gear, and the axial direction of the third gear is perpendicular to the axial direction of the first gear. The active force of the three teeth is along the tangential direction of the third gear, and the active force of the third tooth on the first tooth is along the tangential direction of the first gear. That is, neither the first gear nor the third gear is subjected to an axial force, thereby reducing or even eliminating the axial error between the first gear and the third gear, improving the transmission performance of the synchronous element, and improving the rotational stability of the rotating mechanism and reliability. In addition, the types of the first gear and the third gear can be selected according to actual usage conditions, as long as one of the first gear and the third gear is a face gear, and the other is a spur gear, which improves the applicability of the synchronization element.

In a possible implementation manner, the second gear is a face gear, and the fourth gear is a spur gear; the second gear includes a plurality of second teeth, and the second gear also includes a second end surface, and the second gear includes a plurality of second teeth. The second teeth are arranged at intervals on the second end surface; the fourth gear includes a plurality of fourth teeth, and the fourth gear also includes a fourth outer peripheral surface, and the fourth teeth are arranged at intervals on the first end surface. four outer peripheral surfaces, and the direction of the fourth tooth is opposite to that of the second tooth.

It should be noted that the second end surface is an axial end surface of the second gear, and the second end surface is vertically connected to the second outer peripheral surface. The fourth outer peripheral surface is an outer surface surrounding the axial direction of the fourth gear, and the fourth outer peripheral surface is vertically connected to the fourth end surface. In this embodiment, the second gear is a face gear, the fourth gear is a spur gear, and the axial direction of the second gear is perpendicular to the axial direction of the fourth gear. The active force of the second tooth is along the tangential direction of the second gear, and the active force of the second tooth on the fourth tooth is along the tangential direction of the fourth gear. That is, the second gear and the fourth gear are not subjected to axial force, so that the axial error between the second gear and the fourth gear can be reduced or even eliminated, the transmission performance of the synchronous parts can be improved, and the rotation stability of the rotating mechanism can be improved. and reliability. Moreover, the types of the second gear and the fourth gear can be selected according to the actual usage, as long as one of the second gear and the fourth gear is a face gear and the other is a spur gear, which improves the applicability of the synchronous element.

In a possible implementation manner, the synchronization member further includes a first rotation shaft, a second rotation shaft and a third rotation shaft. The first rotating shaft, the second rotating shaft and the third rotating shaft are all rotatably connected to the fixed base. In addition, the axial directions of the first rotating shaft and the second rotating shaft are parallel to the length direction of the fixed base, and the axial direction of the third rotating shaft is parallel to the width direction of the fixed base. The first gear is coaxially fixedly connected to the first rotating shaft, the second gear is coaxially fixedly connected to the second rotating shaft, and the third gear and the fourth gear are respectively coaxially fixed on opposite ends of the third rotating shaft.

In this embodiment, by setting the first rotating shaft and the second rotating shaft, and driving the first gear to rotate through the first rotating shaft, the second rotating shaft drives the second gear to rotate, so that the rotation of the first gear and the second gear can be improved. stability. And, by setting the third rotating shaft, and the third gear and the fourth gear are coaxially fixedly connected with the third rotating shaft, so that the coaxial rotation of the third gear and the fourth gear can be realized, and the third gear and the fourth gear can be lifted. The stability of the four-gear rotation.

In a possible implementation manner, the first synchronous swing arm is fixedly connected to the first rotating shaft, and the second synchronous swing arm is fixedly connected to the second rotating shaft.

In this embodiment, when the first synchronous swing arm rotates, it drives the first rotation shaft to rotate, and then drives the first gear to rotate, and then drives the second gear to rotate through the third gear and the fourth gear, and the second gear drives the second rotation The shaft rotates, thereby driving the second synchronous swing arm to rotate, realizing the synchronous rotation of the first synchronous swing arm and the second synchronous swing arm. In this embodiment, the rotation stability of the first synchronous swing arm can be improved by setting the first rotation shaft, and the rotation stability of the second synchronization swing arm can be improved by setting the second rotation shaft.

In a possible implementation manner, the rotating mechanism includes a first fixing frame and a second fixing frame, and the first fixing frame and the second fixing frame are respectively located on opposite sides in the width direction of the fixing base, Moreover, the first synchronous swing arm is slidably connected to the first fixed frame, and the second fixed frame is slidably connected to the second synchronous swing arm.

Wherein, the first casing is fixedly connected with the first fixing frame, and the second casing is fixedly connected with the second fixing frame. In this embodiment, by setting the first fixed frame and the second fixed frame, when the first casing and the second casing rotate relatively, the first fixed frame drives the first synchronous swing arm to rotate, and the second fixed frame drives the first synchronous swing arm to rotate. The rotation of the two synchronous swing arms can improve the rotation stability of the first synchronous swing arm and the second synchronous swing arm, thereby improving the rotation stability of the rotating mechanism and the foldable electronic device.

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 oppositely arranged; 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 and the first rotation groove The fixed frame is rotatably connected; the second main swing arm is installed in the second rotating groove, and can slide and rotate along the second rotating groove, and the second main swing arm and the second fixed frame rotate connect.

In this embodiment, by setting the first main swing arm and the second main swing arm, and when the first fixed bracket rotates relative to the fixed base, the first main swing arm rotates and slides in the first rotation groove, and the second fixed When the frame rotates relative to the fixed base, the second main swing arm rotates and slides in the second rotating groove, so that the first fixed frame and the second fixed frame can be rotated relative to the fixed base.

In a second aspect, the present application provides a foldable electronic device, including a first housing, a second housing, a display screen and the above-mentioned rotating mechanism. The rotating mechanism is connected between the first casing and the second casing, and the display screen is installed on the first casing, the second casing and the rotating mechanism. When the rotating mechanism rotates, the first housing and the second housing rotate relative to each other, thereby driving the display screen to bend or unfold.

In this embodiment, the rotation stability of the foldable electronic device can be improved by providing the above-mentioned rotating mechanism on the foldable electronic device.

In summary, the present application sets one of the intermeshed first gear and the third gear as a spur gear and one face gear, and the axial direction of the first gear and the third gear is vertical; by making the intermeshed second gear and One of the fourth gears is set as a spur gear, and the other is set as a face gear, and the second gear is perpendicular to the axis of the fourth gear, so that the first gear, the second gear, the third gear and the fourth gear are not affected by The axial force can reduce or even eliminate the axial error of the first gear, the second gear, the third gear and the fourth gear, improve the transmission performance of the synchronous parts, improve the rotation stability and reliability of the rotating mechanism, and at the same time The connection structure between the synchronous part and the fixed base is simplified, the weight of the rotating mechanism is reduced, and the foldable electronic device is light and thin.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

FIG. 1 is a schematic structural diagram of a foldable electronic device provided in an embodiment of the present application in a first state;

Fig. 2 is a schematic structural diagram of a foldable electronic device provided in an embodiment of the present application in a second state;

Fig. 3 is a schematic structural diagram of a foldable electronic device provided in an embodiment of the present application in a third state;

FIG. 4 is a schematic diagram of an exploded structure of the foldable electronic device shown in FIG. 3;

FIG. 5 is a schematic structural diagram of a rotating mechanism in the foldable electronic device shown in FIG. 4;

Fig. 6 is a partial structural schematic view of the fixed base in the rotating mechanism described in Fig. 5;

Fig. 7 is a schematic diagram showing an enlarged structure of the fixed frame in the rotating mechanism shown in Fig. 5;

Fig. 8 is an enlarged structural schematic diagram of the main swing arm in the rotating mechanism shown in Fig. 5;

Fig. 9 is a structural schematic diagram of a synchronous assembly in the rotating mechanism shown in Fig. 5;

Fig. 10 is a schematic structural diagram of the synchronization assembly shown in Fig. 9 in a folded state;

Fig. 11 is a schematic cross-sectional structural view of the rotating mechanism shown in Fig. 5 in a flattened state;

Fig. 12 is a schematic structural diagram of the synchronization component shown in Fig. 9 in another embodiment;

Fig. 13 is a structural schematic diagram of the rotating mechanism shown in Fig. 5 in a folded state.

Detailed ways

Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

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 bar machines to folding machines. The folding machine has a large screen in the open state, which fully satisfies the visual experience of consumers, and is small in size and easy to carry in the closed state. Most folding machines in the prior art realize synchronous movement through synchronous gears in the synchronous mechanism. However, the transmission stability of the existing synchronous gears is poor. The rotation mechanism provided by the present application adopts the meshing of the face gear and the spur gear, which can improve the rotation stability of the rotation mechanism, thereby improving user experience.

Please refer to FIG. 1 to FIG. 3. FIG. 1 is a schematic structural view of the foldable electronic device 500 provided by the embodiment of the present application in the first state, and FIG. 2 is a schematic view of the foldable electronic device 500 provided by the embodiment of the present application in the second state. A schematic structural diagram in a state. FIG. 3 is a schematic structural diagram of a foldable electronic device 500 provided in an embodiment of the present application in a third state.

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.

The foldable electronic device 500 includes but not limited to cellphone, notebook computer, tablet personal computer, laptop computer, personal digital assistant, wearable device (wearable device) or vehicle equipment (mobile device), etc. In the embodiment of the present application, the foldable electronic device 500 is taken as a mobile phone as an example for illustration.

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 half-expanded state, and the foldable electronic device 500 shown in FIG. 3 is in a flat state. Wherein, 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.

It should be noted that a slight deviation is allowed for the angles illustrated in the embodiments of the present application. For example, the unfolding angle α of the foldable electronic device 500 shown in FIG. 2 is 90 degrees means that α may 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 FIG. 3 is 180 degrees means that β can be 180 degrees or about 180 degrees, such as 170 degrees, 175 degrees, 185 degrees and 190 degrees. The angles described in the following examples can be understood in the same way.

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 may also be an electronic device that can be folded multiple times (more than twice). At this time, the foldable electronic device 500 may include multiple parts, two adjacent parts can be folded relatively close to the foldable electronic device 500 in the folded state, and two adjacent parts can be unfolded relatively far away until the foldable electronic device 500 is in the unfolded state. flat state.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of an exploded structure of the foldable electronic device 500 shown in FIG. 3 .

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 an installation surface 350 , and the display surface 340 and the installation surface 350 are disposed opposite to each other. The display surface 340 is used for displaying text, images, videos and the like. 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 (organic light-emitting diode, OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix) organic light-emitting diode (AMOLED) display, mini organic light emitting diode (mini organic light emitting diode) display, micro organic light emitting diode (micro organic light-emitting diode) display, micro organic light emitting diode (micro organic light-emitting diode) display, Quantum dot light emitting diodes (quantum dot light emitting diodes, QLED) display.

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 accommodation groove 230, the second housing 220 is provided with a second accommodation groove 240, and the first housing 220 is provided with a second accommodation groove 240. The accommodating groove 230 and the second accommodating groove 240 communicate to form an accommodating groove of the rotating mechanism 100 . The rotating mechanism 100 is installed in the receiving groove, and is fixedly connected with the first housing 210 and the second housing 220 to realize the rotational connection between the first housing 210 and the second housing 220 . The display screen 300 is installed on the folding device 200 , and the installation surface 350 is fixedly connected to 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 on the first housing 210 , and the second part 320 is installed on the second housing 220 . Wherein, the rotating mechanism 100 is disposed opposite to the foldable part 330 . The first housing 210 and the second housing 220 can be relatively rotated by the rotating mechanism 100 , so that the folding device 200 can switch between the folded state and the unfolded state.

Referring to FIG. 1 , the first housing 210 and the second housing 220 are relatively rotated by the rotating mechanism 100 , and the display screen 300 is folded by the relative proximity of the first housing 210 and the second housing 220 , so that the foldable electronic device 500 can be 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 disposed opposite to each other. At this time, the display screen 300 is located between the first housing 210 and the second housing 220 , which can greatly reduce the probability of the display screen 300 being damaged and realize effective protection for the display screen 300 .

Please refer to FIG. 2 and FIG. 4 together. The first housing 210 and the second housing 220 are relatively rotated by the rotating mechanism 100, and the display screen 300 is expanded by the relative distance between the first housing 210 and the second housing 220, so that The foldable electronic device 500 is unfolded to a half-expanded state. When the foldable electronic device 500 is in a half-expanded state, the first casing 210 and the second casing 220 are unfolded to an angle α, and the first part 310 and the second part 320 are relatively unfolded, and drive the foldable part 330 to unfold. At this time, the angle between the first portion 310 and the second portion 320 is α. In this embodiment, α is 90 degrees. In other embodiments, α may also be about 90 degrees, or 80 degrees, 85 degrees, 95 degrees or 100 degrees, etc.

Please refer to FIG. 3 and FIG. 4 together. The first housing 210 and the second housing 220 are relatively rotated by the rotating mechanism 100, and the display screen 300 is further expanded by the relative distance between the first housing 210 and the second housing 220 until The foldable electronic device 500 unfolds flat. When the folding device 200 is in a flat state, the angle between the first housing 210 and the second housing 220 is β. The foldable part 330 is unfolded, and the first part 310 and the second part 320 are relatively unfolded. At this time, the included 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, which realizes the large-screen display of the foldable electronic device 500 and improves the user's usability. experience. In this embodiment, β is 180 degrees. In other embodiments, β may also be about 180 degrees, 170 degrees, 175 degrees, 185 degrees, 190 degrees, etc.

It should be noted that the included angle α and the included angle β are the included angles between the first housing 210 and the second housing 220 , which are only used to distinguish the first housing 210 and the second housing 220 in different states of the foldable electronic device 500 . The angles between the second housings 220 are different. Wherein, the included angle α refers to the angle between the first casing 210 and the second casing 220 when the foldable electronic device 500 is in a half-expanded state; the included angle β refers to the angle between the foldable electronic device 500 in a flattened state The angle between the first housing 210 and the second housing 220 .

Please refer to FIG. 5 , which is a schematic structural diagram of the rotating mechanism 100 in the foldable electronic device 500 shown in FIG. 4 .

The rotating mechanism 100 includes a fixed base 10 , a fixed frame 20 , a main swing arm 30 and a synchronous assembly 40 . The main swing arm 30 and the synchronizing assembly 40 are arranged at intervals along the length direction of the fixed base 10 , the main swing arm 30 is rotatably and slidably connected to the fixed base 10 , and the synchronizing assembly 40 is rotatably connected to the fixed base 10 . The fixed frame 20 is rotatably connected with the main swing arm 30 and is slidably connected with the synchronization assembly 40 . The foldable portion 330 of the display screen 300 is disposed opposite to the main swing arm 30 , the fixing frame 20 and the fixing base 10 . When the fixed frame 20 rotates relative to the fixed base 10 , it drives the main swing arm 30 and the synchronizing assembly 40 to rotate relative to the fixed base 10 , thereby realizing the rotation of the rotating mechanism 100 and bending of the display screen 300 .

It should be noted that FIG. 5 only shows a partial structure of the rotation mechanism 100 in the positive direction of the Y-axis. The fixed frame 20, the main swing arm 30 and the synchronization assembly 40 are a set of substructures. The entire rotating mechanism 100 has at least two sets of the above-mentioned substructures, and the fixed base 10 is provided with one set of the above-mentioned substructures at opposite ends in the Y direction. That is, one end of the fixed base 10 is provided with the fixed frame 20 , the main swing arm 30 and the synchronizing assembly 40 , and the other end of the fixed base 10 is also provided with the fixed frame 20 , the main swing arm 30 and the synchronizing assembly 40 . In order to enhance the stability of the entire rotating mechanism 100 , between the substructures at both ends of the fixed base 10 , a group of the above-mentioned substructures is added, and the substructures are located in the middle of the fixed base 10 . In order to further enhance the stability of the entire rotating mechanism 100 , two sets of substructures may be added between the substructures at both ends of the fixed base 10 . The number of the substructures can be adjusted according to actual conditions.

In a set of above-mentioned substructures, the fixing frame 20 includes a first fixing frame 21 and a second fixing frame 22 . The main swing arm 30 includes a first main swing arm 31 and a second main swing arm 32 . The first main swing arm 31 and the first fixing frame 21 are installed on one side of the fixed base 10 , and the second main swing arm 32 and the second fixing frame 22 are installed on the other side of the fixed base 10 . One end of the first main swing arm 31 is rotatably and slidably connected to the fixed base 10 , and the other end of the first main swing arm 31 is rotatably connected to the first fixing frame 21 . When the first fixed frame 21 rotates relative to the fixed base 10 , it drives the first main swing arm 31 to rotate relative to the fixed base 10 , and drives the first main swing arm 31 to rotate relative to the first fixed frame 21 . One end of the second main swing arm 32 is rotatably and slidably connected to the fixed base 10 , and the other end of the first main swing arm 31 is rotatably connected to the second fixed frame 22 . When the second fixed frame 22 rotates relative to the fixed base 10 , it drives the second main swing arm 32 to rotate relative to the fixed base 10 , and drives the second main swing arm 32 to rotate relative to the second fixed frame 22 .

In one embodiment, the rotating mechanism 100 further includes a pressing plate, a pressing plate swing arm and a supporting plate (not shown). The support plate is installed on the fixed base 10 for supporting the display screen 300 . The swing arm of the pressing plate is slidably connected with the pressing plate, and is rotatably connected with the fixed base 10 , and the pressing plate is rotatably connected with the fixed frame 20 . When the rotating mechanism 100 is in a flattened state, the pressing plate and the supporting plate jointly support the display screen 300 .

Please refer to FIG. 6 . FIG. 6 is a partial structural diagram of the fixed base 10 in the rotating mechanism 100 shown in FIG. 5 .

The fixed base 10 is elongated, and the length direction of the fixed base 10 is parallel to the Y direction. The fixed base 10 includes a bottom plate 11 , a first side plate 12 , a second side plate 13 , a first end plate 14 and a second end plate (not shown). The first side plate 12 is opposite to the second side plate 13 , and the first side plate 12 and the second side plate 13 are respectively connected to opposite sides of the bottom plate 11 in the X direction. The first end plate 14 is opposite to the second end plate, and the first end plate 14 and the second end plate are connected between the first side plate 12 and the second side plate 13, and are connected to the bottom plate 11 in the Y direction. opposite sides.

The bottom plate 11 is provided with a first rotation slot 111 and a second rotation slot 112 . Bottom walls of the first rotating groove 111 and the second rotating groove 112 are arc-shaped. The first rotating groove 111 and the second rotating groove 112 are opposite to each other and arranged at intervals in the X direction. The first rotating slot 111 is used for installing the first main swing arm 31 , and the first main swing arm 31 can slide and rotate in the first rotating slot 111 . The second rotation slot 112 is used for installing the second main swing arm 32 , and the second main swing arm 32 can slide and rotate in the second rotation slot 112 .

The bottom plate 11 also defines a receiving slot 114 . The receiving slot 114 includes a first sub-slot 1141 , a second sub-slot 1142 and a third sub-slot 1143 . The first sub-groove 1141 and the second sub-groove 1142 are arranged side by side along the X direction and at intervals, and the length direction of the first sub-groove 1141 and the second sub-groove 1142 is parallel to the Y direction. The third sub-slot 1143 is located between the first sub-slot 1141 and the second sub-slot 1142 , and the length direction of the third sub-slot 1143 is parallel to the X direction. The first sub-slot 1141 , the second sub-slot 1142 and the third sub-slot 1143 are all used for installing the synchronization assembly 40 .

In one embodiment, the rotating mechanism 100 further includes an auxiliary swing arm and a platen swing arm (not shown). The fixed base 10 is also provided with a first mounting portion and a second mounting portion (not shown). The first installation part is used for installing the auxiliary swing arm so that the auxiliary swing arm can rotate relative to the fixed base 10 . The second mounting portion is used for mounting the swing arm of the pressing plate so that the swing arm of the pressing plate can rotate relative to the fixed base 10 .

It should be noted that FIG. 6 only shows a partial structure of the fixed base 10 in the positive direction of the Y-axis, and the structure of the fixed base 10 in the negative direction of the Y-axis is axisymmetric to the structure in the positive direction of the Y-axis, or is centered Symmetrical structure.

Please refer to FIG. 7 . FIG. 7 is an enlarged structural schematic diagram of the fixing frame 20 in the rotating mechanism 100 shown in FIG. 5 .

The fixing frame 20 includes a first fixing frame 21 and a second fixing frame 22 . The first fixing frame 21 is an elongated plate-like structure with a thickness. The first fixing frame 21 includes a first upper surface 2111 , a first lower surface 2112 , a first side surface 2113 , a second side surface 2114 , a first surface 2115 and a second surface 2116 . The first upper surface 2111 is opposite to the first lower surface 2112 , the first side surface 2113 is opposite to the second side surface 2114 , and the first surface 2115 is opposite to the second surface 2116 . Both the first side surface 2113 and the second side surface 2114 are connected between the first upper surface 2111 and the first lower surface 2112, and the first surface 2115 and the second surface 2116 are connected to the first side surface 2113 and the second side surface 2114 between.

The first fixing bracket 21 is provided with a first notch 212 , a first slide slot 213 and a first guide slot 214 . The first notch 212 is disposed on the first side and runs through the first upper surface 2111 and the first lower surface 2112 . The sidewall of the first notch 212 is provided with a first rotation hole 215 , and the extension direction of the axis of the first rotation hole 215 is parallel to the Y direction. The first rotation hole 215 is used for installing the first main swing arm 31 so that the first main swing arm 31 is connected to the first fixing frame 21 in rotation. The first chute 213 is spaced from the first notch 212 along the Y direction, and the first chute 213 runs through the first side surface 2113 and the second side surface 2114 . The first sliding slot 213 is used for sliding connection with the first synchronous swing arm 41 . The first guide groove 214 is arc-shaped. The first guiding groove 214 is disposed on the first surface 2115 , and opposite ends of the first guiding groove 214 pass through the first side surface 2113 . When the rotating mechanism 100 further includes a pressing plate, the first guide groove 214 is used for installing the pressing plate, so that the pressing plate is slidably and rotatably connected with the first fixing frame 21 .

The second fixing frame 22 and the first fixing frame 21 are mirror symmetrical structures, and the second fixing frame 22 and the first fixing frame 21 are axisymmetric about the symmetry axis O. The second fixing frame 22 includes a second upper surface 2211 , a second lower surface 2212 , a third side surface 2213 , a fourth side surface 2214 , a third surface 2215 and a fourth surface 2216 surrounding the outer surface of the second fixing frame 22 . . The second fixing frame 22 is provided with a second notch 222 , a second sliding slot 223 and a second guide slot 224 . The structure of the second notch 222 is the same as that of the first notch 212 , and the sidewall of the second notch 222 is provided with a second rotation hole 225 . The second rotation hole 225 is used for installing the second main swing arm 32 so that the second main swing arm 32 is connected to the second fixing frame 22 in rotation. The second sliding slot 223 is used for sliding connection with the second synchronous swing arm 42 . When the rotating mechanism 100 further includes a pressing plate, the second guide groove 224 is used for installing the pressing plate, so that the pressing plate is slidably and rotationally connected with the second fixing bracket 22 .

Please refer to FIG. 8 . FIG. 8 is an enlarged structural schematic diagram of the main swing arm 30 in the rotating mechanism 100 shown in FIG. 5 .

The main swing arm 30 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 structure, and the structure of the first rotating body 311 matches the structure of the first rotating groove 111 of the fixed base 10 . The first oscillating body 312 has 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 extension direction of the axis of the first rotating shaft 313 is parallel to the Y direction. The first main swing arm 31 is installed in the first rotating groove 111 for rotating and slidingly connecting with the fixed base 10 and rotatingly connecting with the first fixing frame 21 .

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 main swing arm 32 is installed in the second rotation groove 112 of the fixed base 10 for rotating and slidingly connecting with the fixing base 10 and rotatingly connecting with the second fixing frame 22 .

Please also refer to FIG. 5 , the first fixed frame 21 and the first main swing arm 31 are located on one side of the fixed base 10 , that is, in the negative direction of the X-axis of the fixed base 10 . The second fixed frame 22 and the second main swing arm 32 are located on the other side of the fixed base 10 , that is, in the positive direction of the X-axis of the fixed base 10 . Wherein, the first rotating body 311 of the first main swing arm 31 is installed in the first rotating groove 111 , and the first rotating body 311 can slide and rotate in the first rotating groove 111 . The first rotating shaft 313 is installed in the first rotating hole 215 of the first fixing frame 21 , and the first rotating shaft 313 can rotate in the first rotating hole 215 . The first fixing frame 21 is fixedly connected with the first casing 210 . The second main swing arm 32 is arranged side by side with the first main swing arm 31 along the X direction. The second rotating body 321 of the second main swing arm 32 is installed in the second rotating groove 112 , and the second rotating body 321 can slide and rotate in the second rotating groove 112 . The second rotating shaft 323 is installed in the second rotating hole 225 of the second fixing frame 22 , and the second rotating shaft 323 can rotate in the second rotating hole 225 . The second fixing frame 22 is fixedly connected with the second housing 220 .

The rotation of the first housing 210 relative to the fixed base 10 can drive the first fixed bracket 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 rotating hole 215, The first rotating body 311 rotates in the first rotating groove 111 . The rotation of the second casing 220 relative to the fixed base 10 can drive the second fixed frame 22 to rotate relative to the fixed base 10, thereby driving the second main swing arm 32 to rotate, and making the second rotating shaft 323 rotate in the second rotating hole 225 , the second rotating body 321 rotates in the second rotating groove 112 . Wherein, the rotation direction of the first fixed frame 21 is opposite to that of the second fixed frame 22 , and the rotation direction of the first main swing arm 31 is opposite to that of the second main swing arm 32 . For example, when the rotating mechanism 100 is switched from the unfolded state to the folded state, the first fixed frame 21 and the first main swing arm 31 rotate clockwise ω ₁ , and the second fixed frame 22 and the second main swing arm 32 rotate counterclockwise ω ₂ . When the rotating mechanism 100 is switched from the folded state to the unfolded state, the first fixed frame 21 and the first main swing arm 31 rotate counterclockwise _ω2 , and the second fixed frame 22 and the second main swing arm 32 rotate clockwise _ω1 .

In this embodiment, by setting the first fixed frame 21 and the second fixed frame 22, and making the first fixed frame 21 fixedly connected with the first housing 210, the second fixed frame 22 is fixedly connected with the second housing 220, thereby The connection strength between the fixing frame 20 and the casing can be increased, and the rotation stability of the foldable electronic device 500 can be improved. Moreover, by setting the first main swing arm 31 and the second main swing arm 32 , the rotation of the first fixing frame 21 and the second fixing frame 22 relative to the fixed base 10 can be realized.

Please refer to FIG. 9 . FIG. 9 is a schematic structural diagram of the synchronizing assembly 40 in the rotating mechanism 100 shown in FIG. 5 .

The synchronization assembly 40 includes a first synchronization swing arm 41 , a second synchronization swing arm 42 and a synchronization member 1 . The first synchronous swing arm 41 and the second synchronous swing arm 42 are respectively located on opposite sides of the synchronous member 1 in the X direction, and are fixedly connected to the synchronous member 1 . The synchronization element 1 is installed in the fixed base 10 and can rotate in the fixed base 10 . When the first synchronous swing arm 41 rotates relative to the fixed base 10 , it drives the synchronous member 1 to rotate, thereby driving the second synchronous swing arm 42 to rotate, so as to realize the synchronous rotation of the first synchronous swing arm 41 and the second synchronous swing arm 42 .

The synchronizer 1 includes a first rotating portion 43 , a second rotating portion 44 and a third rotating portion 45 . The first rotating part 43 includes a first rotating shaft 431 and a first gear 432 . The extension direction of the first rotation axis 431 is parallel to the Y direction. The first gear 432 is a spur gear. The first gear 432 includes a first outer peripheral surface 4321 . The first outer peripheral surface 4321 is an outer surface surrounding the first gear 432 . The first gear 432 includes first teeth 4322 . In this embodiment, the first teeth 4322 are straight teeth. In other embodiments, the first teeth 4322 may also be helical teeth or arc-shaped teeth. There are multiple first teeth 4322 . A plurality of first teeth 4322 are spaced on the first outer peripheral surface 4321 . The first gear 432 is fixedly installed on the first rotating shaft 431 , and the axis of the first gear 432 and the axis of the first rotating shaft 431 are on the same straight line. When the first rotating shaft 431 rotates around its axis, it drives the first gear 432 to rotate simultaneously with the first rotating shaft 431 .

The second rotating part 44 includes a second rotating shaft 441 and a second gear 442 . The extension direction of the second rotation axis 441 is parallel to the Y direction. The second gear 442 is a spur gear. The second gear 442 includes a second outer peripheral surface 4421 . The second outer peripheral surface 4421 is an outer surface surrounding the second gear 442 . The second gear 442 includes second teeth 4422 . In this embodiment, the second teeth 4422 are straight teeth. In other embodiments, the second teeth 4422 can also be helical teeth or arc teeth. There are multiple second teeth 4422 . A plurality of second teeth 4422 are spaced on the second outer peripheral surface 4421 . The second gear 442 is fixedly installed on the second rotating shaft 441 , and the axis of the second gear 442 and the axis of the second rotating shaft 441 are on the same straight line. When the second rotating shaft 441 rotates around its axis, the second gear 442 is driven to rotate simultaneously with the second rotating shaft 441 . The second rotation shaft 441 and the first rotation shaft 431 are arranged side by side and spaced apart along the X direction, and the second gear 442 is arranged side by side and spaced apart from the first gear 432 along the X direction.

The third rotating part 45 includes a third rotating shaft 451 , a third gear 452 and a fourth gear 453 . The third gear 452 is a face gear. The third gear 452 includes a third end surface 4521 . The third end surface 4521 is an axial end surface of the third gear 452 . The third gear 452 includes third teeth 4522 . In this embodiment, the third teeth 4522 are straight teeth. In other embodiments, the third tooth 4522 can also be a helical tooth or an arc-shaped tooth, as long as the third tooth 4522 and the first tooth 4322 can cooperate with each other. That is to say, the first teeth 4322 and the third teeth 4522 can be straight teeth, helical teeth, or arc teeth at the same time. There are multiple third teeth 4522 . A plurality of third teeth 4522 are spaced apart from the third end surface 4521 . The third gear 452 is fixedly installed on one end of the third rotating shaft 451 , and the axial direction of the third gear 452 and the axial direction of the third rotating shaft 451 are on the same straight line. That is, the axial direction of the third gear 452 is parallel to the X direction. The third gear 452 meshes with the first gear 432 .

The fourth gear 453 is a face gear. The fourth gear 453 includes a fourth end surface 4531 . The fourth end surface 4531 is an axial end surface of the fourth gear 453 . The fourth gear 453 includes fourth teeth 4532 . In this embodiment, the fourth teeth 4532 are straight teeth. In other embodiments, the fourth tooth 4532 can also be a helical tooth or an arc-shaped tooth, as long as the fourth tooth 4532 and the second tooth 4422 can cooperate with each other. That is to say, the second tooth 4422 and the fourth tooth 4532 can be straight teeth, helical teeth, or arc-shaped teeth at the same time. There are multiple fourth teeth 4532 . A plurality of fourth teeth 4532 are spaced apart from the fourth end surface 4531 . The fourth gear 453 is fixedly installed on the end of the third rotating shaft 451 facing away from the third gear 452 , and the axial direction of the fourth gear 453 and the axial direction of the third rotating shaft 451 are on the same straight line. That is, the axial direction of the fourth gear 453 is parallel to the X direction. Wherein, the direction of the fourth tooth 4532 is opposite to that of the third tooth 4522 , and the fourth gear 453 meshes with the second gear 442 .

The first synchronous swing arm 41 includes a first synchronous swing body 411 and a first shaft seat 412 . The first shaft seat 412 is fixedly connected with the first synchronous swing body 411 . The second synchronous swing arm 42 includes a second synchronous swing body 421 and a second shaft seat 422 . The second shaft seat 422 is fixedly connected with the second synchronous swinging body 421 . The first synchronous swing arm 41 is fixedly connected to the first rotating part 43 , the second synchronous swing arm 42 is fixedly connected to the second rotating part 44 , and the first synchronous swing arm 41 and the second synchronous swing arm 42 are opposite and symmetrically arranged. Wherein, the first rotating shaft 431 is installed in the first shaft seat 412 and fixedly connected with the first shaft seat 412 . The second rotating shaft 441 is installed in the second shaft seat 422 and fixedly connected with the second shaft seat 422 .

Please also refer to FIG. 10 . FIG. 10 is a structural schematic diagram of the synchronization assembly 40 shown in FIG. 9 in a folded state.

When the synchronization assembly 40 is in the flattened state, the first synchronization swing arm 41 and the second synchronization swing arm 42 are relatively unfolded, that is, the angle between the first synchronization swing arm 41 and the second synchronization swing arm 42 is approximately 180° . When the synchronization assembly 40 is in the folded state, the first synchronization swing arm 41 and the second synchronization swing arm 42 are folded relative to each other. That is, the first synchronous swing arm 41 and the second synchronous swing arm 42 are arranged approximately in parallel. When the first synchronous oscillating body 411 rotates, it drives the first shaft seat 412 to rotate, thereby drives the first rotating shaft 431 to rotate synchronously, and drives the first gear 432 to rotate. When the first gear 432 rotates, it drives the third gear 452 to rotate around the third rotating shaft 451, and drives the fourth gear 453 to rotate through the third rotating shaft 451, thereby driving the second gear 442 to rotate and driving the second rotating shaft 441 to rotate , and then drive the second shaft seat 422 to rotate, so as to drive the second synchronous swing body 421 to rotate, thereby realizing the synchronous rotation of the first synchronous swing arm 41 and the second synchronous swing arm 42 .

Wherein, the rotation directions of the first synchronous swing arm 41 and the second synchronous swing arm 42 are opposite, the rotation directions of the first gear 432 and the second gear 442 are opposite, the third gear 452 and the fourth gear 453 rotate coaxially, and the rotation direction same. For example, when the synchronization assembly 40 rotates from the unfolded state to the folded state, the first synchronization swing arm 41 and the first gear 432 rotate counterclockwise _ω2 , and the second synchronization swing arm 42 and the second gear 442 rotate clockwise _ω1 . When the synchronization assembly 40 rotates from the folded state to the unfolded state, the first synchronization swing arm 41 and the first gear 432 rotate clockwise _ω1 , and the second synchronization swing arm 42 and the second gear 442 rotate counterclockwise _ω2 .

Please refer to FIG. 5 and FIG. 11 together. FIG. 11 is a schematic cross-sectional structure diagram of the rotating mechanism 100 shown in FIG. 5 .

The synchronous assembly 40 is installed in the fixed base 10 , and the first synchronous swing arm 41 and the second synchronous swing arm 42 are respectively located on opposite sides of the fixed base 10 in the X direction. The first synchronous oscillating body 411 is installed on the first chute 213 of the first fixed frame 21, and the first synchronous oscillating body 411 can slide along the first chute 213, and the second synchronous oscillating body 421 is installed on the second fixed frame 22. The second sliding slot 223 , and the second synchronous swinging body 421 can slide along the second sliding slot 223 . The synchronizer 1 is installed in the receiving groove 114 of the fixed base 10, the first rotating shaft 431 is installed in the first sub-slot 1141, the second rotating shaft 441 is installed in the second sub-slot 1142, and the third rotating shaft 451 is installed in the Inside the third sub-groove 1143 . Moreover, the first rotating shaft 431 , the second rotating shaft 441 and the third rotating shaft 451 are all rotatably connected to the fixed base 10 . The extending directions of the first rotating shaft 431 and the second rotating shaft 441 are parallel to the Y direction, and the extending direction of the third rotating shaft 451 is parallel to the X direction. That is, the first rotating shaft 431 and the second rotating shaft 441 are arranged along the length direction of the fixed base 10 , and the third rotating shaft 451 is arranged along the width direction of the fixed base 10 .

When the first fixed frame 21 rotates relative to the fixed base 10 , it drives the first synchronous swing arm 41 to rotate, and makes the first synchronous swing body 411 slide in the first sliding groove 213 . When the first synchronous swing arm 41 rotates, it drives the first rotating shaft 431 to rotate at the same time, thereby driving the first gear 432 to rotate. When the first gear 432 rotates, it drives the third gear 452 to rotate, and drives the third rotating shaft 451 to rotate, so as to drive the fourth gear 453 to rotate, thereby driving the second gear 442 to rotate. When the second gear 442 rotates, it drives the second rotating shaft 441 to rotate, thereby driving the second synchronous swing arm 42 to rotate, and makes the second synchronous swing body 421 slide in the second chute 223, thereby realizing the first synchronous swing arm 41 and the synchronous rotation of the second synchronous swing arm 42 , and the synchronous rotation of the first fixed frame 21 and the second fixed frame 22 .

In this embodiment, by setting the synchronous part 1, and when the first synchronous swing arm 41 rotates, the second synchronous swing arm 42 can be driven to rotate by the synchronous part 1, so that the synchronization of the first synchronous swing arm 41 and the second synchronous swing arm can be realized. 42, thereby realizing the synchronous rotation of the rotating mechanism 100 and the foldable electronic device.

In this embodiment, by setting the first gear 432 and the second gear 442 as spur gears, the third gear 452 and the fourth gear 453 as face gears, and the axial direction of the first gear 432 and the axis of the third gear 452 vertical, the second gear 442 is perpendicular to the axial direction of the fourth gear 453, so that when the first gear 432 drives the third gear 452 to rotate, the force exerted by the first tooth 4322 on the third tooth 4522 is along the tangential direction of the third gear 452 , the force exerted by the third tooth 4522 on the first tooth 4322 is along the tangential direction of the first gear 432 . At the same time, when the fourth gear 453 drives the second gear 442 to rotate, the force exerted by the fourth tooth 4532 on the second tooth 4422 is along the tangential direction of the second gear 442, and the force exerted by the second tooth 4422 on the fourth tooth 4532 is along the fourth tooth 4532. Tangential to gear 453. That is to say, the first gear 432, the second gear 442, the third gear 452, and the fourth gear 453 are not subject to axial force, so that the forces of the first gear 432, the second gear 442, and the third gear can be reduced or even eliminated. 452 and the axial error of the fourth gear 453, improve the transmission performance of the synchronous part 1, improve the stability and reliability of the rotation of the synchronous assembly 40, simplify the connection structure between the synchronous part 1 and the fixed base 10, and reduce the speed of the synchronous assembly. The weight of 40 realizes the thinning and lightening of the rotating mechanism 100 and the foldable electronic device. At the same time, when designing the synchronous assembly 40, there is no need to check the tooth surface contact condition, which can simplify the design process and save labor. It should be explained that the "tangential" mentioned here refers to the tangential direction, that is, the direction perpendicular to the radial direction. For example, “tangential to the third gear 452 ” refers to a direction perpendicular to the radial direction of the third gear 452 .

Moreover, in this embodiment, by using the third gear 452 as a face gear, the degree of coincidence between the first gear 432 and the third gear 452 can be improved, and by using the fourth gear 453 as a face gear, the degree of overlap between the second gear 442 can be improved. The degree of overlap with the fourth gear 453 can improve the bearing capacity of the gear, improve the stability of the transmission of the synchronous member 1, and further improve the rotation stability of the rotating mechanism 100 and the foldable electronic device.

Simultaneously, adopt spur gear among the present embodiment as first gear 432 and second gear 442, adopt face gear as the 3rd gear 452 and the 4th gear 453, spur gear and face gear all can adopt standard gear, simple in structure, easy to maintain Low cost and high interchangeability. Moreover, the shape of the face gear can be adjusted according to actual application scenarios and usage conditions, which has higher flexibility and saves costs.

Please refer to FIG. 12 , which is a schematic structural diagram of another embodiment of the synchronization component 40 shown in FIG. 9 .

The difference between this embodiment and the embodiment shown in FIG. 9 is that in this embodiment, the first gear 432 and the second gear 442 are face gears, and the third gear 452 and the fourth gear 453 are spur gears.

Wherein, the first gear 432 further includes a first end surface 4323 , the first end surface 4323 is vertically connected to the first outer peripheral surface 4321 , and the first end surface 4323 is an axial end surface of the first gear 432 . A plurality of first teeth 4322 are disposed on the first end surface 4323 at intervals, and the first teeth 4322 face the negative direction of the Y-axis. The second gear 442 further includes a second end surface 4423 , the second end surface 4423 is vertically connected to the second outer peripheral surface 4421 , and the second end surface 4423 is an axial end surface of the second gear 442 . A plurality of second teeth 4422 are disposed on the second end surface 4423 at intervals, and the second teeth 4422 face the negative direction of the Y axis.

The third gear 452 further includes a third outer peripheral surface 4523 , the third outer peripheral surface 4523 is vertically connected to the third end surface 4521 , and the third outer peripheral surface 4523 is a circumferential outer surface surrounding the third gear 452 . A plurality of third teeth 4522 are spaced on the third outer peripheral surface 4523 and face the first teeth 4322 , and the third gear 452 meshes with the first gear 432 . The fourth gear 453 further includes a fourth outer peripheral surface 4533 , the fourth outer peripheral surface 4533 is vertically connected to the fourth end surface 4531 , and the fourth outer peripheral surface 4533 is an outer surface surrounding the fourth gear 453 . A plurality of fourth teeth 4532 are spaced on the fourth outer peripheral surface 4533 and facing the second teeth 4422 , and the fourth gear 453 meshes with the second gear 442 .

When the first gear 432 rotates, the first tooth 4322 exerts force on the third tooth 4522 to make the third gear 452 rotate, thereby driving the fourth gear 453 to rotate through the third rotating shaft 451 . When the fourth gear 453 rotates, the fourth tooth 4532 exerts a force on the second tooth 4422 to make the second gear 442 rotate, thereby realizing the synchronization of the first gear 432, the second gear 442, the third gear 452 and the fourth gear 453 Rotate, and then realize the synchronous rotation of the synchronous assembly 40.

In this embodiment, by setting the first gear 432 and the second gear 442 as face gears, the third gear 452 and the fourth gear 453 as spur gears, and the axial direction of the first gear 432 is aligned with the axis of the third gear 452 Vertically, the second gear 442 is perpendicular to the axial direction of the fourth gear 453, so that the first gear 432, the second gear 442, the third gear 452 and the fourth gear 453 are not subjected to an axial force, thereby reducing or even The axial error of the first gear 432 and the third gear 452 is eliminated, the transmission performance of the synchronization member 1 is improved, and the stability and reliability of the rotation of the synchronization assembly 40 are improved. And, by using the third gear 452 and the fourth gear 453 as face gears, the degree of coincidence between the first gear 432 and the third gear 452 and the degree of coincidence between the second gear 442 and the fourth gear 453 can be improved, thereby improving The load-carrying capacity of the gear improves the stability of the transmission of the synchronous member 1 , thereby improving the rotation stability of the rotating mechanism 100 and the foldable electronic device.

In other embodiments, the first gear 432 may also be a spur gear, the third gear 452 may be a face gear, the fourth gear 453 may be a spur gear, and the second gear 442 may be a face gear. Alternatively, the first gear 432 may be a face gear, the third gear 452 may be a spur gear, the fourth gear 453 may be a face gear, and the second gear 442 may be a spur gear. As long as one of the first gear 432 and the third gear 452 is a face gear and the other is a spur gear, one of the second gear 442 and the fourth gear 453 is a face gear and the other is a spur gear.

In one embodiment, the rotating mechanism 100 further includes a damper (not shown). The damping element is mounted on the fixed base 10 and hinged with the synchronous assembly 40 . When the first synchronous swing arm 41 and the second synchronous swing arm 42 rotate relative to the fixed base 10, they resist the damping member so that the damping member generates a damping force to prevent the first synchronous swing arm 41 and the second synchronous swing arm 42 from moving. Rotate, so as to provide the user with a damping feel and improve the user's experience.

Please refer to FIG. 5 and FIG. 13 together. FIG. 13 is a structural schematic diagram of the rotating mechanism 100 shown in FIG. 5 in a folded state.

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 part 330 is located in the escape 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 part 330 is bent, so that the foldable part 330 will not be bent at a large angle, avoiding creases and other undesirable phenomena on the display screen 300, and helping to extend the display time. The service life of the screen 300.

As shown in Figure 13, when the rotating mechanism 100 is in the folded state, the first fixed frame 21 is rotated counterclockwise by _ω2 , which drives the first main swing arm 31 to rotate counterclockwise by _ω2 , and makes the first rotating shaft 313 relative to the first fixed frame 21. Rotate, at the same time, the first fixed frame 21 also drives the first synchronous swing arm 41 to rotate counterclockwise _ω2 , and makes the first synchronous swing body 411 slide in the first sliding groove 213. When the first synchronous swing arm 41 rotates counterclockwise _ω2 , the first rotating shaft 431 drives the first gear 432 to rotate counterclockwise _ω2 , thereby driving the third gear 452 to rotate, and the third rotating shaft 451 drives the fourth gear 453 Rotate, and then drive the second gear 442 to rotate clockwise _ω1 . When the second gear 442 rotates clockwise ω ₁ , it drives the second rotating shaft 441 to rotate clockwise ω ₁ , thereby driving the second synchronous swing arm 42 to rotate clockwise ω ₁ , and drives the second fixed mount 22 to rotate clockwise ω ₁ , The first synchronous oscillating body 411 slides in the second slide groove 223 . When the second synchronous swing arm 42 rotates clockwise ω ₁ , it drives the second main swing arm 32 to rotate clockwise ω ₁ , and makes the second rotating shaft rotate relative to the second fixed mount 22, so that the second fixed mount 22 and the first fixed mount The frame 21 is relatively expanded, the first main swing arm 31 and the second main swing arm 32 are relatively expanded, the first synchronous swing arm 41 and the second synchronous swing arm 42 are relatively expanded, and then the rotating mechanism 100 is rotated to a flattened state (as shown in FIG. 5).

As shown in Figure 5, when the rotating mechanism 100 is in the flattened state, the first fixed frame 21 is rotated clockwise ω ₁ , which drives the first main swing arm 31 to rotate clockwise ω ₁ , and makes the first rotating shaft 313 relative to the first fixed frame 21 rotates, and at the same time, the first fixed frame 21 also drives the first synchronous swing arm 41 to rotate clockwise ω ₁ , and makes the first synchronous swing body 411 slide in the first chute 213. When the first synchronous swing arm 41 rotates clockwise _ω1 , the first rotation shaft 431 drives the first gear 432 to rotate clockwise _ω1 , thereby driving the third gear 452 to rotate, and the third rotation shaft 451 drives the fourth gear 453 Rotate, and then drive the second gear 442 to rotate counterclockwise _ω2 . When the second gear 442 rotates counterclockwise _ω2 , it drives the second rotating shaft 441 to rotate counterclockwise _ω2 , thereby driving the second synchronous swing arm 42 to rotate counterclockwise _ω2 , and drives the second fixed mount 22 to rotate counterclockwise _ω2 , The first synchronous oscillating body 411 slides in the second slide groove 223 . When the second synchronous swing arm 42 rotates counterclockwise _ω2 , it drives the second main swing arm 32 to rotate counterclockwise _ω2 , and makes the second rotating shaft rotate relative to the second fixed mount 22, so that the second fixed mount 22 and the first fixed mount The frame 21 is relatively folded, the first main swing arm 31 and the second main swing arm 32 are relatively folded, the first synchronous swing arm 41 and the second synchronous swing arm 42 are relatively folded, and then the rotating mechanism 100 is rotated to the folded state (as shown in FIG. 13 shown).

The above are only some examples and implementations of the present application, and the protection scope of the present application is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and should cover all Within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (12)

1. A rotation mechanism, comprising: the device comprises a fixed base, a first synchronous swing arm, a second synchronous swing arm and a synchronous piece;

the synchronous piece comprises a first gear, a second gear, a third gear and a fourth gear, the first gear and the second gear are arranged in parallel at intervals, the third gear and the fourth gear are fixedly connected and axially parallel, the third gear and the fourth gear are both positioned between the first gear and the second gear, and the axial direction of the third gear is vertical to the axial direction of the first gear; the first gear is meshed with the third gear, one of the first gear and the third gear is a straight gear, and the other gear is a face gear; the second gear is meshed with the fourth gear, one of the second gear and the fourth gear is a straight gear, and the other gear is a face 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 piece is arranged in the fixed base and is rotationally connected with the fixed base, and the first synchronous swing arm and the second synchronous swing arm are respectively positioned on two opposite sides of the fixed base in the width direction.

2. The rotation mechanism of claim 1, wherein the rotation mechanism has a folded state and a flattened state, wherein,

slewing mechanism is in during the exhibition flat state, first synchronous swing arm with the synchronous swing arm of second expandes relatively, works as first synchronous swing arm orientation is close to when the unable adjustment base direction rotates, first synchronous swing arm drives first gear revolve, first gear drives third gear revolve, thereby the third gear drives fourth gear revolve, the fourth gear drives second gear revolve, the second gear and then drive the synchronous swing arm orientation of second is close to first synchronous swing arm direction rotates, so that slewing mechanism is in fold condition.

3. The rotary mechanism of claim 1 or 2 wherein the first gear is a spur gear and the third gear is a face gear; the first gear comprises a plurality of first teeth, the first gear further comprises a first outer peripheral surface, and the plurality of first teeth are arranged on the first outer peripheral surface at intervals; the third gear comprises a plurality of third teeth, the third gear further comprises a third end surface, the third teeth are arranged on the third end surface at intervals, and the orientation of the third teeth is opposite to that of the first teeth.

4. The rotary mechanism of claim 3 wherein the second gear is a spur gear and the fourth gear is a face gear; the second gear comprises a plurality of second teeth, the second gear further comprises a second outer circumferential surface, and the plurality of second teeth are arranged on the second outer circumferential surface at intervals; the fourth gear comprises a plurality of fourth teeth, the fourth gear further comprises a fourth end surface, the fourth teeth are arranged on the fourth end surface at intervals, and the orientation of the fourth teeth is opposite to that of the second teeth.

5. The rotating mechanism according to claim 4, wherein the first tooth and the third tooth are straight teeth, or skewed teeth, or arc-shaped teeth; and

the second teeth and the fourth teeth are straight teeth, or inclined teeth, or arc-shaped teeth.

6. A rotation mechanism according to claim 1 or 2, wherein the first gear is a face gear and the third gear is a spur gear; the first gear comprises a plurality of first teeth, the first gear further comprises a first end surface, and the plurality of first teeth are arranged on the first end surface at intervals; the third gear comprises a plurality of third teeth, the third gear further comprises a third outer peripheral surface, the third teeth are arranged on the third outer peripheral surface at intervals, and the orientation of the third teeth is opposite to that of the first teeth.

7. The rotary mechanism of claim 6 wherein the second gear is a face gear and the fourth gear is a spur gear; the second gear comprises a plurality of second teeth, the second gear further comprises a second end face, and the second teeth are arranged on the second end face at intervals; the fourth gear comprises a plurality of fourth teeth, the fourth gear further comprises a fourth outer circumferential surface, the fourth teeth are arranged on the fourth outer circumferential surface at intervals, and the orientation of the fourth teeth is opposite to that of the second teeth.

8. The rotating mechanism according to claim 4 or 7, wherein the synchronizing member further comprises a first rotating shaft, a second rotating shaft and a third rotating shaft, the first rotating shaft, the second rotating shaft and the third rotating shaft are all rotatably connected with the fixed base, the axial directions of the first rotating shaft and the second rotating shaft are all parallel to the length direction of the fixed base, and the axial direction of the third rotating shaft is parallel to the width direction of the fixed base;

the first gear is coaxially and fixedly connected with the first rotating shaft, the second gear is coaxially and fixedly connected with the second rotating shaft, and the third gear and the fourth gear are respectively and coaxially fixed at two opposite ends of the third rotating shaft.

9. The rotating mechanism according to claim 8, wherein the first synchronizing swing arm is fixedly connected to the first rotating shaft, and the second synchronizing swing arm is fixedly connected to the second rotating shaft.

10. The rotating mechanism according to claim 9, wherein the rotating mechanism comprises a first fixing frame and a second fixing frame, the first fixing frame and the second fixing frame are respectively located at two opposite sides of the fixed base in the width direction, the first synchronizing swing arm is slidably connected with the first fixing frame, and the second fixing frame is slidably connected with the second synchronizing swing arm.

11. The rotating mechanism according to claim 10, wherein the fixed base is provided with a first rotating groove and a second rotating groove, the first rotating groove and the second rotating groove being disposed opposite to each other; the rotating mechanism comprises a first main swing arm and a second main swing arm, the first main swing arm is mounted in the first rotating groove and can slide and rotate along the first rotating groove, and the first main swing arm is rotatably connected with the first fixing frame; the second main swing arm is installed in the second rotating groove, can slide along the second rotating groove and rotate, and is rotatably connected with the second fixing frame.

12. A foldable electronic device, comprising a first housing, a second housing, a display screen, and a rotating mechanism according to any one of claims 1 to 11, wherein the rotating mechanism is connected between the first housing and the second housing, the display screen is mounted on the first housing, the second housing and the rotating mechanism, and when the rotating mechanism rotates, the first housing and the second housing rotate relatively, so as to drive the display screen to bend or unfold.

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