Rotating mechanism and folding electronic equipment

Abstract

The embodiment of the invention relates to the technical field of foldable electronic products, in particular to a rotating mechanism and foldable electronic equipment, and aims to solve the problem that the rotating mechanism is prone to overload. The rotating mechanism comprises a driving gear, a planetary gear, a first gear and a second gear. The central axis of the driving gear is a first axis, the planetary gear is meshed with the driving gear, the first gear is meshed with the planetary gear, the central axis of the first gear is a first axis, the second gear is meshed with the planetary gear, the central axis of the second gear is a first axis, and the tooth number of the second gear is different from that of the first gear. When the rotating mechanism is in the automatic mode state, the first gear is static. When the rotating mechanism is in the state that the automatic mode and the manual mode coexist, the first gear rotates around the first axis, the torque of the manual driving force transmitted to the driving gear is reduced, the overload phenomenon of the rotating mechanism is avoided, and the reliability of the rotating mechanism is improved conveniently.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of foldable electronic products, and in particular, to a rotating mechanism and a foldable electronic device. Background Art

[0002] With the continuous development of display technology, foldable display terminals have gradually become a development trend of future mobile electronic products. When the foldable electronic device is in the unfolded state, it can obtain a larger display area and improve the viewing effect. When the foldable electronic device is in the folded state, it can obtain a smaller volume, which is convenient for users to carry.

[0003] Among them, the foldable electronic device at least includes a first structural member, a second structural member, and a rotating mechanism. The rotating mechanism may include a driving motor, the driving motor is fixed on the first structural member, and the transmission shaft of the driving motor is connected to the second structural member. By the rotation of the transmission shaft of the driving motor, the first structural member rotates relative to the second structural member. In the actual use process, the rotating mechanism is prone to overload, resulting in a reduction in the reliability of the rotating mechanism. Summary of the Invention

[0004] The embodiments of the present application provide a rotating mechanism and a foldable electronic device, which are used to improve the problem that the rotating mechanism is prone to overload.

[0005] To achieve the above object, the embodiments of the present application provide the following solutions:

[0006] On the one hand, a rotating mechanism is provided, including: a driving gear, a planetary gear, a first gear, and a second gear. The central axis of the driving gear is the first axis, the planetary gear meshes with the driving gear, the first gear meshes with the planetary gear, the central axis of the first gear is the first axis, the second gear meshes with the planetary gear, the central axis of the second gear is the first axis, and the number of teeth of the second gear is different from the number of teeth of the first gear.

[0007] When the rotating mechanism is in the automatic mode state, the driving gear rotates around the first axis, the planetary gear rotates around its own central axis, and the planetary gear rotates around the first axis, the second gear rotates around the first axis, and the first gear is stationary. Through the above settings, when the rotating mechanism is in the automatic mode state, the driving gear can drive the second gear to rotate, which is convenient for realizing that the foldable electronic device can be switched between the folded state and the unfolded state. Through the above settings, when the rotating mechanism is in the automatic mode state, the driving gear can drive the second gear to rotate, which is convenient for realizing that the foldable electronic device can be switched between the folded state and the unfolded state.

[0008] When the rotating mechanism is in a state where the automatic mode and the manual mode coexist, the second gear rotates about the first axis, the planetary gear rotates about its own central axis, and the planetary gear rotates about the first axis, the driving gear rotates about the first axis, and the first gear rotates about the first axis.

[0009] Through the above settings, when the rotating mechanism is in a state where the automatic mode and the manual mode coexist, the manual driving force transmitted to the rotating mechanism can cause the first gear to rotate about the first axis and can cause the planetary gear to rotate about its own central axis, which is beneficial to reducing the torque of the manual driving force transmitted to the driving gear, avoiding the overload phenomenon of the rotating mechanism, and facilitating improving the reliability of the rotating mechanism.

[0010] Furthermore, in an embodiment where the rotating mechanism includes a driving motor, reducing the manual driving force transmitted to the driving gear is also beneficial to reducing the torque transmitted to the transmission shaft of the driving motor, making the torque transmitted to the transmission shaft of the driving motor lower than the limit torque, which plays a role in protecting the driving motor. At the same time, since the central axes of the first gear, the second gear, and the driving gear are all the first axis, it is beneficial to reduce the size of the rotating mechanism perpendicular to the first axis, facilitating saving the occupied space of the rotating mechanism and realizing the miniaturization of the folding electronic device.

[0011] In some implementation manners, the rotating mechanism further includes a housing and an elastic friction assembly. The housing covers the planetary gear, the first gear, and the second gear. The elastic friction assembly is between the first gear and the housing. In the extending direction of the first axis, the first end of the first gear contacts the housing, the second end of the first gear abuts against the first end of the elastic friction assembly, and the second end of the elastic friction assembly abuts against the housing.

[0012] In summary, when the rotating mechanism is in the automatic mode state, the first gear remains stationary under the action of the static friction force of the elastic friction assembly. When the rotating mechanism is in a state where the automatic mode and the manual mode coexist, the first gear rotates by overcoming the maximum static friction force of the elastic friction assembly. The rotation of the first gear cancels part of the manual driving force transmitted to the driving gear, which is beneficial to reducing the torque of the manual driving force transmitted to the driving gear, avoiding the overload phenomenon of the rotating mechanism, and facilitating improving the reliability of the rotating mechanism.

[0013] In some implementation manners, the elastic friction assembly includes an elastic member and a friction plate. The friction plate is located between the first gear and the elastic member. In the extending direction of the first axis, the first end of the elastic member abuts against the friction plate; the second end of the elastic friction assembly abuts against the housing, including: the second end of the elastic member abuts against the housing. Through the above settings, the elastic restoring force of the spring plate has a component force parallel to the first axis, so that the spring plate can squeeze the friction plate along the direction parallel to the first axis, thereby increasing the friction force received by the first gear.

[0014] In some implementations, when the rotating mechanism is in the automatic mode, in the extending direction of the first axis, the size of the elastic member is the first size; when the rotating mechanism is in a state where the automatic mode and the manual mode coexist, in the extending direction of the first axis, the size of the elastic member is the second size, and the second size is equal to the first size. Through the above settings, when the rotating mechanism is in a state where the automatic mode and the manual mode coexist, and when the rotating mechanism is in the automatic mode, the elastic restoring force provided by the elastic member is the same. When the extrusion force applied to the friction plate is the same, when the first gear is stationary, that is, when the rotating mechanism is in the automatic mode, the damping force applied to the rotating mechanism is smaller; when the first gear is rotating, that is, when the rotating mechanism is in a state where the automatic mode and the manual mode coexist, the damping force applied to the rotating mechanism is larger.

[0015] In some implementations, when the rotating mechanism is in the manual mode, the second gear rotates around the first axis, the planetary gear rotates around its own central axis, and the planetary gear also rotates around the first axis, the first gear rotates around the first axis, and the driving gear is stationary; in the extending direction of the first axis, the size of the elastic member is the third size, and the third size is equal to the first size. Through the above settings, when the rotating mechanism is in the automatic mode, and when the rotating mechanism is in the manual mode, the elastic restoring force provided by the elastic member is the same. When the extrusion force applied to the friction plate is the same, when the first gear is stationary, that is, when the rotating mechanism is in the automatic mode, the damping force applied to the rotating mechanism is smaller; when the first gear is rotating, that is, when the rotating mechanism is in a state where the automatic mode and the manual mode coexist, the damping force applied to the rotating mechanism is larger.

[0016] In some implementations, the elastic friction assembly further includes a first connecting member located between the first gear and the friction plate. The first connecting member has a protruding first bump, and the first bump extends into the first groove of the first gear. Through the above settings, when the first gear rotates around the first axis, the first connecting member also rotates around the first axis. Since the mating portion of the first connecting member is located between the first gear and the friction plate, it avoids direct contact between the friction plate and the first gear, which is conducive to avoiding wear of the first gear.

[0017] In some implementations, the planetary gear includes a first planetary gear set and a second planetary gear set. The first planetary gear set includes a plurality of first planetary gears circumferentially arranged along a first axis. The first planetary gears mesh with a first gear and also mesh with a drive gear. The second planetary gear set includes a plurality of second planetary gears circumferentially arranged along the first axis. The second planetary gears mesh with a second gear. Along a reference direction, the first planetary gears and the second planetary gears are connected, and the central axes of the first planetary gears and the central axes of the second planetary gears coincide. The reference direction is parallel to the first axis and does not coincide with the extending direction of the first axis.

[0018] In some implementations, the first planetary gear includes a first gear shaft and a second gear shaft. The gear portion of the first gear shaft is located between the first shaft portion and the second shaft portion of the first gear shaft. The gear portion of the second gear shaft is located between the first shaft portion and the second shaft portion of the second gear shaft. Along the reference direction, the distance between the first shaft portion of the first gear shaft and the gear portion of the second gear shaft is greater than the distance between the second shaft portion of the first gear shaft and the gear portion of the second gear shaft. The distance between the first shaft portion of the second gear shaft and the gear portion of the first gear shaft is greater than the distance between the second shaft portion of the second gear shaft and the gear portion of the first gear shaft. Among the first planetary gear and the second planetary gear located along the reference direction: the second shaft portion of the first gear shaft and the second shaft portion of the second gear shaft are connected. Through the above arrangement, the motion states of the first planetary gear and the second planetary gear are made the same.

[0019] In some implementations, the drive gear includes a drive gear shaft. The gear portion of the drive gear shaft is located between the first shaft portion and the second shaft portion of the drive gear shaft. The rotating mechanism further includes a first bracket sleeved on the first shaft portion of the drive gear shaft and rotatably connected to the first shaft portion of the drive gear shaft. The first bracket has a first accommodation hole. The first shaft portion of the first gear shaft is located in the first accommodation hole and is rotatably connected to the first accommodation hole. The rotating mechanism further includes a second bracket sleeved on the second shaft portion of the drive gear shaft and rotatably connected to the second shaft portion of the drive gear shaft. The second bracket has a second accommodation hole. The first shaft portion of the second gear shaft is located in the second accommodation hole and is rotatably connected to the second accommodation hole. Through the above arrangement, the first bracket can rotate relative to the first shaft portion of the drive gear shaft, the first shaft portion of the first gear shaft can rotate relative to the first bracket, the second bracket can rotate relative to the second shaft portion of the drive gear shaft, and the first shaft portion of the first gear shaft can rotate relative to the first bracket.

[0020] In some implementations, the rotating mechanism further includes a third bracket located between the first bracket and the second bracket. The third bracket is sleeved on the second shaft portion of the drive gear shaft and is rotatably connected to the second shaft portion of the drive gear shaft. The third bracket has a third accommodation hole. The second shaft portion of the first gear shaft is located in the third accommodation hole and is rotatably connected to the third accommodation hole. The second shaft portion of the first gear shaft has a first mating surface that intersects a reference surface perpendicular to the first axis. The second shaft portion of the second gear shaft is located in the third accommodation hole and is rotatably connected to the third accommodation hole. The second shaft portion of the second gear shaft has a second mating surface that intersects the reference surface. The first mating surface and the second mating surface are in contact. With the above arrangement, within the same third accommodation hole, when the second shaft portion of the first gear shaft rotates relative to the third accommodation hole, the first mating surface pushes the second mating surface to move, so that the second shaft portion of the second gear shaft also rotates relative to the third accommodation hole. Moreover, the rotation directions of the first gear shaft and the second gear shaft can be the same.

[0021] In some implementations, the rotating mechanism includes a drive motor and a connection structure. The drive shaft of the drive motor is connected to the second shaft portion of the drive gear through the connection structure. With the above arrangement, when the drive shaft of the drive motor rotates, the drive shaft drives the drive gear shaft to rotate. That is, the drive motor can drive the drive gear to rotate, so that the drive gear can drive the planetary gear to rotate.

[0022] In some implementations, the number of teeth of the first planetary gear is different from that of the second planetary gear. With the above arrangement, the rotational speed transmitted from the drive gear to the second gear changes, which is beneficial to meeting the different rotational speed requirements of the second structural member.

[0023] In some implementations, the first gear is an internal gear ring sleeved outside the first planetary gear. With the above arrangement, the first gear, the first planetary gear, the first bracket, and the drive gear can jointly form a planetary gear train. In this planetary gear train, the drive gear can be the sun gear, the first bracket can be the planet carrier, the multiple first planetary gears in the first planetary gear set can be the multiple planet gears, and the first gear can be the ring gear. By setting the first gear as an internal gear ring, it is convenient for the structural compactness of the above planetary gear train and is beneficial to improving the assembly stability of the first planetary gear.

[0024] In some implementations, the second gear is an internal gear ring sleeved outside the second planetary gear. With the above arrangement, it is convenient to improve the structural compactness of the rotating mechanism and is beneficial to improving the assembly stability of the second planetary gear.

[0025] In some implementations, the rotating mechanism further includes a second connecting member. The second planetary gear is located between the second connecting member and the first planetary gear. The second connecting member has a second convex block, and the second convex block extends into the second groove of the second gear. With the above arrangement, it is beneficial to further improve the connection reliability between the second connecting member and the second gear.

[0026] On the other hand, a folding electronic device is provided, including: a first structural member, a second structural member, and a rotating mechanism as described in any of the above embodiments. The transmission shaft of the rotating mechanism is connected to the first structural member, and the second gear of the rotating mechanism is connected to the second structural member. The folding electronic device provided by the embodiments of the present application includes the rotating mechanism as described above, and thus has all the above beneficial effects, which will not be elaborated here. Description of the Drawings

[0027] Figure 1 It is a structural diagram of a folding electronic device provided by an embodiment of the present application in an unfolded state;

[0028] Figure 2 It is a structural diagram of a folding electronic device provided by an embodiment of the present application in a folded state;

[0029] Figure 3 It is a structural diagram of a rotating mechanism provided by some embodiments;

[0030] Figure 4 It is a structural diagram of a rotating mechanism provided by an embodiment of the present application;

[0031] Figure 5 For Figure 4 the cross-sectional view of the rotating mechanism along the B-B section line in;

[0032] Figure 6 It is a structural diagram of a rotating mechanism provided by an embodiment of the present application after removing the housing;

[0033] Figure 7 It is a front view of a rotating mechanism provided by an embodiment of the present application after removing the housing;

[0034] Figure 8 For Figure 6 the cross-sectional view of the rotating mechanism along the A-A section line in;

[0035] Figure 9 It is an exploded view of a rotating mechanism provided by an embodiment of the present application in an automatic mode state;

[0036] Figure 10 It is an exploded view of a rotating mechanism provided by an embodiment of the present application in a state where the automatic mode and the manual mode coexist;

[0037] Figure 11An exploded view of another rotating mechanism provided by an embodiment of the present application in a state where the automatic mode and the manual mode coexist;

[0038] Figure 12 An exploded view of a rotating mechanism provided by an embodiment of the present application in the manual mode state;

[0039] Figure 13 An exploded view of a first bracket, a second bracket, a third bracket, and a planetary gear provided by an embodiment of the present application;

[0040] Figure 14 An exploded view of a first connecting member and a first gear provided by an embodiment of the present application;

[0041] Figure 15 An exploded view of a second connecting member and a second gear provided by an embodiment of the present application. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0043] Hereinafter, terms such as "first" and "second" are only used for convenience of description, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0044] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0045] In the embodiments of the present application, for example, the direction indicators such as up, down, left, right, front, and back used to explain the structures and movements of different components in the present application are relative. When the components are in the positions shown in the figures, these indicators are appropriate. However, if the description of the positions of the components changes, then these direction indicators will also change accordingly.

[0046] Here, "parallel" and "perpendicular" include the described situations and situations similar to the described ones, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurements under discussion and the errors associated with the measurements of specific quantities (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, where the acceptable deviation range for approximate parallel can be, for example, a deviation within 5%; similarly, "perpendicular" includes absolute perpendicular and approximate perpendicular, where the acceptable deviation range for approximate perpendicular can be, for example, a deviation within 5%.

[0047] An embodiment of the present application provides a foldable electronic device. Among them, the foldable electronic device can be a terminal product such as a mobile phone, a tablet computer (pad), a television, a smart wearable product (e.g., a smart watch, a smart bracelet), a virtual reality (VR, virtual reality) device, an augmented reality (AR, augmented reality) device, etc.

[0048] Figure 1 It is a structural diagram of a foldable electronic device provided by an embodiment of the present application in an unfolded state; Figure 2 It is a structural diagram of a foldable electronic device provided by an embodiment of the present application in a folded state. As Figure 1 and Figure 2 shown, the foldable electronic device 1 includes a flexible screen 30. The flexible screen 30 can be an active matrix organic light emitting diode (AMOLED) display screen.

[0049] As a self-luminous display screen, the AMOLED display screen does not need to be provided with a backlight module (BLM). Therefore, when the substrate of the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have the characteristic of being bendable.

[0050] In addition, as Figure 1As shown, the foldable electronic device 1 further includes a rotating mechanism 10, a first structural member 21, and a second structural member 22. The rotating mechanism 10 is connected between the first structural member 21 and the second structural member 22. The first structural member 21 and the second structural member 22 are used to carry the flexible screen 30, so that the flexible screen 30 remains as flat as possible during use and protects the non-display surface of the flexible screen 30. The first structural member 21 and the second structural member 22 can rotate relative to the rotating mechanism 10 respectively. In the embodiments of the present application, only some structures of the first structural member 21 and the second structural member 22 are briefly described by way of example, and are also simplified and illustrated in the drawings. The embodiments of the present application do not strictly limit the specific structures of the first structural member 21 and the second structural member 22.

[0051] Among them, the first structural member 21 and the second structural member 22 may respectively include a middle frame structure for installing and fixing other components of the foldable electronic device 1. For example, a camera, an earphone, a receiver, a button, a battery, etc. The embodiments of the present application do not limit other electronic components provided on the first structural member 21 and the second structural member 22. The first structural member 21 and the second structural member 22 may also respectively include a decorative cover plate for protecting the devices inside the middle frame structure and for presenting part of the appearance of the foldable electronic device 1.

[0052] Exemplarily, a part of the flexible screen 30 may be fixed to the first structural member 21 through an adhesive layer 40, a part may be fixed to the second structural member 22 through the adhesive layer 40, and a part may be fixed to the rotating mechanism 10. The adhesive layer 40 may be a thin film layer formed after applying glue. The embodiments of the present application do not limit the specific form of the adhesive layer 40. For example, the adhesive layer 40 may be a discontinuous thin film layer, or the adhesive layer 40 may also be a whole-layer thin film layer. In addition, other electronic components may also be provided on the first structural member 21 and the second structural member 22.

[0053] As Figure 1 shown, when the first structural member 21 and the second structural member 22 are in a flat state, the included angle between the first structural member 21 and the second structural member 22 may be approximately 180° (it can be understood that there may be a slight deviation in the included angle between the first structural member 21 and the second structural member 22. For example, the included angle may be 165°, 177°, or 185°). At this time, the flexible screen 30 is also in a flat state, that is, the foldable electronic device 1 is in a flat state.

[0054] As Figure 2As shown, when the first structural member 21 and the second structural member 22 are in the folded state, the angle between the first structural member 21 and the second structural member 22 can be approximately 0° (it can be understood that there may be a slight deviation in the angle between the first structural member 21 and the second structural member 22, for example, the angle can be 1°, 3°, or 5°). At this time, the flexible screen 30 is also in the folded state, that is, the folding electronic device 1 is in the folded state.

[0055] In some embodiments, the rotating mechanism can have two working modes: an automatic mode and a manual mode. In the embodiments of the present application, the "automatic mode" can be understood as that the rotating mechanism makes the first structural member rotate relative to the second structural member (or makes the second structural member rotate relative to the first structural member) through the movement of internal components. The "manual mode" can be understood as that the rotating mechanism is manually driven to rotate so that the first structural member rotates relative to the second structural member (or the second structural member rotates relative to the first structural member).

[0056] Figure 3 It is a structural diagram of a rotating mechanism 10 provided for some embodiments. As Figure 3 shown, the rotating mechanism 10 can include a driving motor 100. The driving motor 100 is fixed on the first structural member 21, and the transmission shaft of the driving motor 100 is connected to the second structural member 22. When the rotating mechanism 10 is in the automatic mode, the transmission shaft of the driving motor 100 rotates, so that the second structural member 22 rotates relative to the first structural member 21. When the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, while the transmission shaft of the driving motor 100 rotates, the second structural member 22 can also be manually driven to rotate. For example, when the transmission shaft of the driving motor 100 drives the second structural member 22 to rotate towards the first structural member 21, the second structural member 22 is manually driven to rotate towards the first structural member 21 at the same time. Through the above setting, the torque applied to the transmission shaft of the driving motor 100 is increased, resulting in the overload of the driving motor 100 and reducing the reliability of the rotating mechanism 10.

[0057] Figure 4 It is a structural diagram of a rotating mechanism 10 provided for the embodiments of the present application; Figure 5 For Figure 4 the sectional view of the rotating mechanism 10 along the B-B section line in; Figure 6 It is a structural diagram of the rotating mechanism 10 with the housing removed provided for the embodiments of the present application; Figure 7 It is a front view of the rotating mechanism 10 with the housing removed provided for the embodiments of the present application; Figure 8 For Figure 6 the sectional view of the rotating mechanism 10 along the A-A section line in. Below, with reference to Figures 4 to 8 , a rotating mechanism 10 provided for the embodiments of the present application will be described.

[0058] In view of this, in the embodiments of the present application, with reference to Figure 5 and Figure 8 , the rotating mechanism 10 may include a driving gear 700, a planetary gear 800, a first gear 500, and a second gear 600.

[0059] Among them, the central axis of the driving gear 700 may be the first axis S1, and the planetary gear 800 may be meshed with the driving gear 700. Exemplarily, the central axis S2 of the planetary gear 800 may be parallel to the first axis S1 and spaced apart from the first axis S1.

[0060] The embodiments of the present application do not limit the specific shape of the driving gear 700. For example, the outer shape of the driving gear 700 may include a cylindrical gear or a bevel gear, the tooth line shape of the driving gear 700 may include a spur gear, a helical gear, a herringbone gear, etc., and the surface where the gear of the driving gear 700 is located may include the outer surface or the inner surface of the driving gear 700. Similarly, the embodiments of the present application do not limit the specific shape of the planetary gear 800, as long as it can be meshed with the driving gear 700.

[0061] In some embodiments, as Figure 5 shown, the driving gear 700 may include a driving gear shaft 700a. The "gear shaft" mentioned here and below can be understood as an integral structure formed by machining a gear and a rotating shaft. The gear portion 713 of the driving gear shaft is located between the first shaft portion 711 and the second shaft portion 712 of the driving gear shaft. Based on the above structure, the planetary gear 800 may be meshed with the gear portion 713 of the driving gear shaft, so that the planetary gear 800 can be meshed with the driving gear 700. In the embodiments of the present application, the driving gear 700 is the driving gear shaft 700a. Of course, in some other examples, the driving gear 700 may further include other gear structures, as long as the other gear structures can be meshed with the planetary gear 800.

[0062] In some embodiments, the rotating mechanism 10 may include a driving motor 100 and a connecting structure 200. The transmission shaft of the driving motor 100 may be connected to the second shaft portion 712 of the driving gear shaft through the connecting structure 200. Among them, the connecting structure 200 may include a coupling. Through the above settings, when the transmission shaft of the driving motor 100 rotates, the transmission shaft of the driving motor 100 drives the driving gear shaft 700a to rotate, that is, the driving motor 100 can drive the driving gear 700 to rotate, so that the driving gear 700 can drive the planetary gear 800 to rotate. Of course, in some other embodiments, the rotating mechanism 10 may further include other driving components, as long as the driving components can drive the driving gear 700 to rotate.

[0063] Continue to refer to Figure 5 andFigure 8 , the first gear 500 can mesh with the planetary gear 800, and the central axis of the first gear 500 can be the first axis S1. Exemplarily, the planetary gear 800 can include an external gear, the first gear 500 can include an internal gear, and the first gear 500 can be sleeved outside the planetary gear 800 and the driving gear 700 so that the central axes of the first gear 500 and the driving gear 700 coincide. The embodiments of the present application do not limit the specific shape of the first gear 500, as long as it can mesh with the planetary gear 800.

[0064] Continue to refer to Figure 5 and Figure 8 , the second gear 600 can mesh with the planetary gear 800, and the central axis of the second gear 600 is the first axis S1. Exemplarily, the planetary gear 800 can include an external gear, the second gear 600 can include an internal gear, and the second gear 600 can be sleeved outside the planetary gear 800 and the driving gear 700 so that the central axes of the second gear 600 and the driving gear 700 coincide. The embodiments of the present application do not limit the specific shape of the second gear 600, as long as it can mesh with the planetary gear 800.

[0065] In the embodiments of the present application, the number of teeth of the second gear 600 and the number of teeth of the first gear 500 can be different. Since the number of teeth of the second gear 600 is different from the number of teeth of the first gear 500, under the drive of the planetary gear 800, the rotation states of the first gear 500 and the second gear 600 can be different.

[0066] When the rotating mechanism 10 is assembled in the folding electronic device, the driving gear 700 can be connected to the first structural member 21, and the second gear 600 can be connected to the second structural member 22. When the second gear 600 rotates, the second structural member 22 can rotate relative to the first structural member 21 so that the folding electronic device can be switched between the folded state and the unfolded state.

[0067] Figure 9 is an exploded view of the structure of a rotating mechanism 10 provided by an embodiment of the present application in the automatic mode state. As Figure 9 shown, when the rotating mechanism 10 is in the automatic mode state, the driving gear 700 can rotate around the first axis S1, the planetary gear 800 rotates around its own central axis, and the planetary gear 800 rotates around the first axis S1, the second gear 600 rotates around the first axis S1, and the first gear 500 is stationary.

[0068] Exemplarily, when the rotating mechanism 10 is in the automatic mode, the driving gear 700 rotates around the first axis S1, and the planetary gear 800 rotates around its own central axis under the drive of the driving gear 700 (i.e., the planetary gear 800 rotates self). Since the first gear 500 is stationary, the planetary gear 800 also rotates around the first axis S1 (i.e., the planetary gear 800 revolves around the first axis S1). Driven by the planetary gear 800, the second gear 600 rotates around the first axis S1. The rotating mechanism 10 may further include other components. When the rotating mechanism 10 is in the automatic mode, this component may be connected to the first gear 500 to keep the first gear 500 stationary.

[0069] The following only takes the conversion process of the rotating mechanism 10 from the unfolded state to the folded state in the automatic mode as an example to describe the rotation direction of the gears in the rotating mechanism 10. For example, the driving gear 700 rotates clockwise around the first axis S1 (such as the direction a1 in Figure 9 ), and the planetary gear 800 rotates counterclockwise around its own central axis under the drive of the driving gear 700 (such as the direction c1 in Figure 9 ); since the first gear 500 is stationary, the planetary gear 800 also rotates clockwise around the first axis S1 (such as the direction b1 in Figure 9 ); driven by the planetary gear 800, the second gear 600 rotates clockwise around the first axis S1 (such as the direction d1 in Figure 9 ).

[0070] Through the above settings, when the rotating mechanism 10 is in the automatic mode, the driving gear 700 can drive the second gear 600 to rotate, so that the second structural member 22 can rotate relative to the first structural member 21, facilitating the folding electronic device to be convertible between the folded state and the unfolded state.

[0071] Figure 10 FIG. is an exploded view of a rotating mechanism 10 in a state where the automatic mode and the manual mode coexist according to an embodiment of the present application; Figure 11 FIG. is another exploded view of a rotating mechanism 10 in a state where the automatic mode and the manual mode coexist according to an embodiment of the present application. As shown in Figure 10 and Figure 11 , when the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, the second gear 600 rotates around the first axis S1, the planetary gear 800 rotates around its own central axis, and the planetary gear 800 rotates around the first axis S1, the driving gear 700 rotates around the first axis S1, and the first gear 500 rotates around the first axis S1.

[0072] Exemplarily, when the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, the second gear 600 rotates around the first axis S1 under the action of the manual driving force, and the planetary gear 800 rotates around the first axis S1 driven by the second gear 600 (i.e., the planetary gear 800 revolves around the first axis S1), and the first gear 500 rotates around the first axis S1 driven by the planetary gear 800. At the same time, since the driving gear 700 rotates around the first axis S1, the planetary gear 800 rotates around its own central axis driven by the driving gear 700 (i.e., the planetary gear 800 rotates on its own axis). Wherein, the rotating mechanism 10 may further include other components. When the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, this component can be connected to the first gear 500, and the first gear 500 overcomes the connection force between it and this component and rotates.

[0073] When the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, for example, it may include two states: in the first state, the movement tendency of the rotating mechanism 10 in the automatic mode is opposite to the movement tendency of the rotating mechanism 10 in the manual mode. During the process of the rotating mechanism 10 transitioning from the unfolded state to the folded state in the automatic mode, manually drive the second structural member to rotate in the opposite direction (or manually prevent the second structural member from continuing to rotate). As Figure 10 shown, at this time, the driving gear 700 can rotate clockwise around the first axis S1 (as in Figure 10 the a2 direction in), the second gear 600 rotates counterclockwise around the first axis S1 under the action of the manual driving force (as in Figure 10 the d2 direction in), the planetary gear 800 rotates counterclockwise around the first axis S1 driven by the second gear 600 (as in Figure 10 the b2 direction in), and at the same time, the planetary gear 800 rotates counterclockwise around its own central axis driven by the driving gear 700 (as in Figure 10 the c2 direction in). And, the first gear 500 rotates counterclockwise around the first axis S1 driven by the planetary gear 800 (as in Figure 10 the e2 direction in).

[0074] In the second state, the movement tendency of the rotating mechanism 10 in the automatic mode is the same as the movement tendency of the rotating mechanism 10 in the manual mode. During the process of the rotating mechanism 10 transitioning from the unfolded state to the folded state in the automatic mode, manually drive the second structural member to rotate in the same direction, and the manually driven rotation speed is greater than the rotation speed in the automatic mode. As Figure 11 shown, at this time, the driving gear 700 can rotate clockwise around the first axis S1 (as in Figure 11 the a3 direction in), the second gear 600 rotates clockwise around the first axis S1 under the action of the manual driving force (as in Figure 11in the d3 direction in FIG.), and the rotational speed of the second gear 600 increases. The planetary gear 800 rotates clockwise around the first axis S1 under the drive of the second gear 600 (as shown in the b3 direction in FIG. Figure 11 ). Meanwhile, the planetary gear 800 rotates counterclockwise around its own central axis under the drive of the drive gear 700 (as shown in the c3 direction in FIG. Figure 11 ). Moreover, the first gear 500 rotates clockwise around the first axis S1 under the drive of the planetary gear 800 (as shown in the e3 direction in FIG. Figure 11 ).

[0075] In summary, when the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, the manual driving force transmitted to the rotating mechanism 10 can cause the first gear 500 to rotate around the first axis S1, and can also cause the planetary gear 800 to rotate around its own central axis, which is beneficial to reducing the torque of the manual driving force transmitted to the drive gear 700, avoiding the overload phenomenon of the rotating mechanism 10, and facilitating the improvement of the reliability of the rotating mechanism 10.

[0076] Furthermore, in the embodiment where the rotating mechanism 10 includes a drive motor 100, reducing the manual driving force transmitted to the drive gear 700 is also beneficial to reducing the torque on the transmission shaft of the drive motor 100, so that the torque on the transmission shaft of the drive motor 100 is lower than the limit torque, playing a role in protecting the drive motor 100.

[0077] At the same time, since the central axes of the first gear 500, the second gear 600, and the drive gear 700 are all the first axis S1, it is beneficial to reduce the size of the rotating mechanism 10 in the direction perpendicular to the first axis S1, which is beneficial to saving the occupied space of the rotating mechanism 10 and facilitating the miniaturization of the foldable electronic device.

[0078] Through the above settings, when the rotating mechanism 10 is in the automatic mode state, the drive gear 700 can drive the second gear 600 to rotate, so that the second structural member can rotate relative to the first structural member, facilitating the foldable electronic device to switch between the folded state and the unfolded state.

[0079] When the foldable electronic device switches between the folded state and the unfolded state, in some examples, the drive gear 700 of the rotating mechanism 10 is always in a rotating state, that is, the rotating mechanism 10 is always in the automatic mode state. In some other examples, the drive gear 700 of the rotating mechanism 10 can stop rotating, and the rotating mechanism 10 can only be in the manual mode state.

[0080] Figure 12 This is an exploded view of the structure of a rotating mechanism 10 in the manual mode state provided by the embodiment of the present application. As shown in FIG. Figure 12As shown, when the rotating mechanism 10 is in the manual mode, the second gear 600 can rotate about the first axis S1, the planetary gear 800 rotates about its own central axis, and the planetary gear 800 rotates about the first axis S1, the first gear 500 rotates about the first axis S1, and the driving gear 700 is stationary.

[0081] Exemplarily, when the rotating mechanism 10 is in the manual mode, the second gear 600 can rotate about the first axis S1, and the planetary gear 800 rotates about the first axis S1 driven by the second gear 600 (i.e., the planetary gear 800 revolves about the first axis S1). Since the driving gear 700 is stationary, the planetary gear 800 also rotates about its own central axis (i.e., the planetary gear 800 rotates on its own axis). The first gear 500 rotates about the first axis S1 driven by the planetary gear 800.

[0082] Hereinafter, only the conversion process of the rotating mechanism 10 from the unfolded state to the folded state in the manual mode is taken as an example to describe the rotation direction of the gears in the rotating mechanism 10. For example, the second gear 600 rotates clockwise about the first axis S1 (such as Figure 12 the direction d4 in), and the planetary gear 800 rotates clockwise about the first axis S1 driven by the second gear 600 (such as Figure 12 the direction b4 in); since the driving gear 700 is stationary, the planetary gear 800 also rotates clockwise about its own central axis (such as Figure 12 the direction c4 in); driven by the planetary gear 800, the first gear 500 rotates clockwise about the first axis S1 (such as Figure 12 the direction e4 in).

[0083] In some embodiments, as shown in Figure 4 and Figure 5 , the rotating mechanism 10 may further include a housing 50. The housing 50 can cover the outside of the planetary gear 800, the first gear 500, and the second gear 600. Among them, the housing 50 can be fixedly connected to the first structural member. By providing the housing 50, it is beneficial to improve the assembly stability of the planetary gear 800, the first gear 500, and the second gear 600, and can prevent the planetary gear 800, the first gear 500, and the second gear 600 from being exposed to the external environment, which is beneficial to protecting the planetary gear 800, the first gear 500, and the second gear 600 and extending the service life of the rotating mechanism 10.

[0084] Exemplarily, the housing 50 may include a first part 51, a second part 52, and a third part 53. The second part 52 is located between the first part 51 and the third part 53. The first part 51, the second part 52, and the third part 53 jointly enclose an accommodation space, and the first gear 500, the second gear 600, the planetary gear 800, and at least a part of the driving gear 700 are all located in the accommodation space.

[0085] Specifically, the first part 51 may include a first sleeve 511 and a first stop plate 512. The first sleeve 511 is generally a hollow cylindrical structure. The first stop plate 512 is connected to the first sleeve 511 and covers an opening on one side of the first sleeve 511. The second part 52 is generally a hollow cylindrical structure, and the second part 52 communicates with the opening on the other side of the first sleeve 511. The third part 53 may include a third sleeve 531 and a third stop plate 532. The third sleeve 531 is generally a hollow cylindrical structure. The third stop plate 532 is connected to the third sleeve 531 and covers an opening of the third sleeve 531 that is away from the second part 52. The first stop plate 512 and the third stop plate 532 are arranged along the extending direction P1 of the first axis, and the planetary gear 800 is located between the first stop plate 512 and the third stop plate 532. The first part 51, the second part 52, and the third part 53 may be connected together by threaded fasteners such as bolts. Of course, the above structure of the housing 50 is only exemplary, and the embodiments of the present application do not specifically limit the structure of the housing 50.

[0086] Based on the above structure, the rotating mechanism 10 may further include an elastic friction assembly 300. The elastic friction assembly 300 may be compressively disposed between the first gear 500 and the housing 50. Among them, in the extending direction P1 of the first axis, the first end of the first gear 500 contacts the housing 50, the second end of the first gear 500 abuts against the first end of the elastic friction assembly 300, and the second end of the elastic friction assembly 300 abuts against the housing 50. Here, "abut" can be understood as that under the action of the elastic restoring force of the elastic friction assembly 300, there is close contact and mutual force between the first end of the elastic friction assembly 300 and the second end of the first gear 500, and there is close contact and mutual force between the second end of the elastic friction assembly 300 and the housing 50.

[0087] Exemplarily, the elastic friction assembly 300 is also located in the accommodation space jointly enclosed by the first part 51, the second part 52, and the third part 53. The first end of the first gear 500 may be Figure 5 the left end of the first gear 500 in Figure 5 and the second end of the first gear 500 may be Figure 5At the left end of the elastic friction assembly 300, the second end of the elastic friction assembly 300 can be Figure 5 the right end of the elastic friction assembly 300. Wherein, the second part 52 of the housing 50 can protrude with a boss 521 in a direction approaching the first axis S1. The boss 521 contacts the first end of the first gear 500. The second end of the first gear 500 abuts against the first end of the elastic friction assembly 300. The second end of the elastic friction assembly 300 can abut against the first stop plate 512 of the first part 51.

[0088] When the rotating mechanism 10 is in the automatic mode, the driving gear 700 rotates around the first axis S1. The planetary gear 800 rotates around its own central axis under the drive of the driving gear 700 (that is, the planetary gear 800 rotates self). Under the action of the static friction force applied by the elastic friction assembly 300 on the first gear 500, the first gear 500 remains stationary, so that the planetary gear 800 also rotates around the first axis S1 (that is, the planetary gear 800 revolves around the first axis S1). Driven by the planetary gear 800, the second gear 600 rotates around the first axis S1, so that the second structural member can rotate relative to the first structural member, facilitating the folding electronic device to switch between the folded state and the unfolded state.

[0089] When the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, the second gear 600 rotates around the first axis S1 under the action of the manual driving force. The planetary gear 800 rotates around the first axis S1 under the drive of the second gear 600 (that is, the planetary gear 800 revolves around the first axis S1). The first gear 500 overcomes the maximum static friction force under the drive of the planetary gear 800 and rotates around the first axis S1. At the same time, since the driving gear 700 rotates around the first axis S1, the planetary gear 800 rotates around its own central axis under the drive of the driving gear 700 (that is, the planetary gear 800 rotates self).

[0090] In summary, when the rotating mechanism 10 is in the automatic mode, the first gear 500 remains stationary under the action of the static friction force of the elastic friction assembly 300. When the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, the first gear 500 rotates by overcoming the maximum static friction force of the elastic friction assembly 300. The rotation of the first gear 500 cancels part of the manual driving force transmitted to the driving gear 700, which is beneficial to reducing the torque of the manual driving force transmitted to the driving gear 700, avoiding the overload phenomenon of the rotating mechanism 10, and facilitating the improvement of the reliability of the rotating mechanism 10.

[0091] Further, the frictional force exerted by the elastic friction assembly 300 on the first gear 500 can serve as the damping force when the rotating mechanism 10 rotates. When the rotating mechanism 10 is in the automatic mode state, the first gear 500 remains stationary, and the planetary gear 800 rotates around the first axis S1. The planetary gear 800 does not need to drive the first gear 500 to move, that is, the damping force received by the rotating mechanism 10 is small, which is beneficial to improving the torque transmission efficiency of the rotating mechanism 10. When the rotating mechanism 10 is in the state where the automatic mode and the manual mode coexist, the first gear 500 rotates by overcoming the maximum static frictional force of the elastic friction assembly 300, that is, the damping force received by the rotating mechanism 10 is relatively large, and this damping force can provide a hovering feeling when the second gear 600 rotates.

[0092] In some embodiments, referring to Figure 9 , Figure 10 and Figure 11 , when the rotating mechanism 10 is in the automatic mode state, in the extending direction P1 of the first axis, the size of the elastic member is the first size H1. When the rotating mechanism 10 is in the state where the automatic mode and the manual mode coexist, in the extending direction P1 of the first axis, the size of the elastic member is the second size H2, and the second size H2 is equal to the first size H1. Through the above settings, when the rotating mechanism 10 is in the state where the automatic mode and the manual mode coexist, and when the rotating mechanism 10 is in the automatic mode state, the occupied space of the rotating mechanism 10 remains unchanged, which is convenient for realizing the miniaturization of the folding electronic device.

[0093] As described in the above embodiments, when the rotating mechanism 10 is in the manual mode state, the first gear 500 rotates by overcoming the maximum static frictional force of the elastic friction assembly 300, and the driving gear 700 remains stationary. The rotational frictional force received by the first gear 500 can provide a hovering feeling when the second gear 600 rotates.

[0094] In some embodiments, referring to Figure 9 and Figure 12 , when the rotating mechanism 10 is in the manual mode state, the second gear 600 rotates around the first axis S1, the planetary gear 800 rotates around its own central axis, and the planetary gear 800 rotates around the first axis S1, the first gear 500 rotates around the first axis S1, and the driving gear 700 remains stationary; in the extending direction P1 of the first axis, the size of the elastic member is the third size H3, and the third size H3 is equal to the first size H1. Through the above settings, when the rotating mechanism 10 is in the automatic mode state, and when the rotating mechanism 10 is in the manual mode state, the occupied space of the rotating mechanism 10 remains unchanged, which is convenient for realizing the miniaturization of the folding electronic device.

[0095] In some embodiments, referring to Figure 5, the elastic friction assembly 300 may include an elastic member 320 and a friction plate 310. The friction plate 310 may be located between the first gear 500 and the elastic member 320. In the extending direction P1 of the first axis, the first end of the elastic member 320 abuts against the friction plate 310. The second end of the elastic friction assembly 300 abuts against the housing 50, including: the second end of the elastic member 320 abuts against the housing 50.

[0096] Exemplarily, the elastic member 320 may include a spring plate, and the spring plate may be sleeved on the second shaft portion 712 of the driving gear shaft. The friction plate 310 may also be sleeved on the second shaft portion 712 of the driving gear shaft. The elastic restoring force of the spring plate has a component force parallel to the first axis S1, so that the spring plate can squeeze the friction plate 310 in a direction parallel to the first axis S1, thereby increasing the frictional force received by the first gear 500.

[0097] Of course, in some examples, the elastic member 320 may also be other elastic structures such as springs. The embodiments of the present application do not limit the specific structure of the elastic member 320.

[0098] Figure 13 It is an exploded view of the structures of a first bracket 910, a second bracket 920, a third bracket 930, and a planetary gear 800 provided by an embodiment of the present application. In combination with Figures 8 to 13 As shown, in some embodiments, the planetary gear 800 may include a first planetary gear set 801 and a second planetary gear set 802. Among them, the first planetary gear set 801 may include a plurality of first planetary gears 810 arranged circumferentially along the first axis S1. The first planetary gears 810 mesh with the first gear 500, and the first planetary gears 810 mesh with the driving gear 700. The second planetary gear set 802 may include a plurality of second planetary gears 820 arranged circumferentially along the first axis S1. The second planetary gears 820 mesh with the second gear 600.

[0099] Exemplarily, the first planetary gear set 801 may include four first planetary gears 810, and the four first planetary gears 810 may be arranged at intervals in the circumferential direction of the driving gear 700. The second planetary gear set 802 may include two second planetary gears 820, and the two planetary gears 800 may be arranged at intervals in the circumferential direction of the driving gear 700. Of course, the number of the first planetary gears 810 in the first planetary gear set 801 and the number of the second planetary gears 820 in the second planetary gear set 802 are only exemplary, and the embodiments of the present application do not limit the number of the first planetary gears 810 and the number of the second planetary gears 820.

[0100] In an embodiment where the drive gear 700 includes a drive gear shaft 700a, the first planetary gear 810 may mesh with the gear portion 713 of the drive gear shaft. Among them, a plurality of second planetary gears 820 may be arranged circumferentially along the first shaft portion 711 of the drive gear shaft, or a plurality of second planetary gears 820 may be arranged circumferentially along the second shaft portion 712 of the drive gear shaft.

[0101] Based on the above structure, as Figure 13 shown, along the reference direction P2, the first planetary gear 810 and the second planetary gear 820 are connected, and the central axis of the first planetary gear 810 coincides with the central axis of the second planetary gear 820. The reference direction P2 is parallel to the first axis S1 and does not coincide with the extending direction P1 of the first axis. Here, "connected" can be understood as direct connection and indirect connection. For example, the first planetary gear 810 and the second planetary gear 820 can be directly connected together by bonding or welding. Or, a transfer member may be provided between the first planetary gear 810 and the second planetary gear 820. The first planetary gear 810 is connected to the transfer member, and the second planetary gear 820 is connected to the transfer member, so that the first planetary gear 810 and the second planetary gear 820 can be indirectly connected together.

[0102] Through the above settings, the motion states of the first planetary gear 810 and the second planetary gear 820 are the same. For example, when the first planetary gear 810 rotates about its own axis (i.e., the first planetary gear 810 rotates self), the second planetary gear 820 also rotates about its own axis (i.e., the second planetary gear 820 rotates self), or when the first planetary gear 810 rotates about the first axis S1 (i.e., the first planetary gear 810 revolves about the first axis S1), the second planetary gear 820 also rotates about the first axis S1 (i.e., the second planetary gear 820 revolves about the first axis S1).

[0103] In summary, when the rotating mechanism 10 is in the automatic mode state, the drive gear 700 rotates about the first axis S1, and the first planetary gear 810 rotates about its own central axis under the drive of the drive gear 700 (i.e., the first planetary gear 810 rotates self). At the same time, the second planetary gear 820 also rotates about its own central axis (i.e., the first planetary gear 810 rotates self); since the first gear 500 is stationary, the first planetary gear 810 also rotates about the first axis S1 (i.e., the first planetary gear 810 revolves about the first axis S1). At the same time, the second planetary gear 820 also rotates about the first axis S1 (i.e., the second planetary gear 820 revolves about the first axis S1); under the drive of the second planetary gear 820, the second gear 600 rotates about the first axis S1, so that the second structural member can rotate relative to the first structural member, facilitating the folding electronic device to be convertible between the folded state and the unfolded state.

[0104] When the rotating mechanism 10 is in a state where the automatic mode and the manual mode coexist, the second gear 600 rotates around the first axis S1 under the action of the manual driving force. The second planetary gear 820 rotates around the first axis S1 driven by the second gear 600 (i.e., the second planetary gear 820 revolves around the first axis S1). At the same time, the first planetary gear 810 also rotates around the first axis S1 (i.e., the first planetary gear 810 revolves around the first axis S1), and the first gear 500 rotates around the first axis S1 driven by the first planetary gear 810. In addition, since the driving gear 700 rotates around the first axis S1, the first planetary gear 810 rotates around its own central axis driven by the driving gear 700 (i.e., the second planetary gear 820 rotates), and at the same time, the first planetary gear 810 also rotates around its own central axis (i.e., the first planetary gear 810 rotates).

[0105] In some embodiments, the number of teeth of the first planetary gear 810 may be different from the number of teeth of the second planetary gear 820. As described in the above embodiments, since the second gear 600 and the second planetary gear 820 are meshed, and the driving gear 700 and the first planetary gear 810 are meshed, when the number of teeth of the first planetary gear 810 is different from the number of teeth of the second planetary gear 820, the rotational speed transmitted from the driving gear 700 to the second gear 600 changes, which is beneficial to adapting to different rotational speed requirements of the second structural member. For example, the number of teeth of the first planetary gear 810 may be greater than the number of teeth of the second planetary gear 820, so that the rotational speed of the second gear 600 is lower than that of the driving gear 700.

[0106] In some embodiments, the first planetary gear 810 may include a first gear shaft 810a, and the gear portion 813 of the first gear shaft is located between the first shaft portion 811 and the second shaft portion 812 of the first gear shaft. In the embodiments of the present application, the first planetary gear 810 is the first gear shaft 810a. Of course, in some other examples, the first planetary gear 810 may further include other gear structures, as long as the other gear structures can be meshed with the driving gear 700.

[0107] In some embodiments, the second planetary gear 820 may include a second gear shaft 820a, and the gear portion 823 of the second gear shaft is located between the first shaft portion 821 and the second shaft portion 822 of the second gear shaft. In the embodiments of the present application, the second planetary gear 820 is the second gear shaft 820a. Of course, in some other examples, the second planetary gear 820 may further include other gear structures, as long as the other gear structures can be meshed with the second gear 600.

[0108] In the reference direction P2, the distance between the first shaft portion 811 of the first gear shaft and the gear portion 823 of the second gear shaft is greater than the distance between the second shaft portion 812 of the first gear shaft and the gear portion 823 of the second gear shaft, and the distance between the first shaft portion 821 of the second gear shaft and the gear portion 813 of the first gear shaft is greater than the distance between the second shaft portion 822 of the second gear shaft and the gear portion 813 of the first gear shaft.

[0109] Exemplarily, the gear portion 813 of the first gear shaft can be meshed with the gear portion 713 of the drive gear, and the gear portion 813 of the first gear shaft can also be meshed with the first gear 500. The first shaft portion 811 of the first gear shaft can be located on the right side of the gear portion 813 of the first gear shaft in the illustrated position, and the second shaft portion 812 of the first gear shaft can be located on the left side of the gear portion 813 of the first gear shaft in the illustrated position.

[0110] Exemplarily, the gear portion 823 of the second gear shaft can be meshed with the second gear 600. The first shaft portion 821 of the second gear shaft can be located on the left side of the gear portion 823 of the second gear shaft in the illustrated position, and the second shaft portion 822 of the second gear shaft can be located on the right side of the gear portion 823 of the second gear shaft in the illustrated position.

[0111] Based on the above structure, among the first planetary gear 810 and the second planetary gear 820 located in the reference direction P2: the second shaft portion 812 of the first gear shaft and the second shaft portion 822 of the second gear shaft are connected. Herein, "connected" can be understood as direct connection and indirect connection. For example, the second shaft portion 812 of the first gear shaft and the second shaft portion 822 of the second gear shaft can be directly connected together by bonding or welding. Or, a transfer member can be provided between the second shaft portion 812 of the first gear shaft and the second shaft portion 822 of the second gear shaft. The second shaft portion 812 of the first gear shaft is connected to the transfer member, and the second shaft portion 822 of the second gear shaft is connected to the transfer member, so that the second shaft portion 812 of the first gear shaft and the second shaft portion 822 of the second gear shaft can be indirectly connected together.

[0112] Through the above settings, the motion states of the first planetary gear 810 and the second planetary gear 820 are the same. For example, when the first planetary gear 810 rotates about its own axis (i.e., the first planetary gear 810 rotates self), the second planetary gear 820 also rotates about its own axis (i.e., the second planetary gear 820 rotates self), or when the first planetary gear 810 rotates about the first axis S1 (i.e., the first planetary gear 810 revolves about the first axis S1), the second planetary gear 820 also rotates about the first axis S1 (i.e., the second planetary gear 820 revolves about the first axis S1).

[0113] Continue to refer to Figures 8 to 13, the rotating mechanism 10 may further include a first bracket 910. The first bracket 910 is sleeved on the first shaft portion 711 of the driving gear shaft and is rotatably connected to the first shaft portion 711 of the driving gear shaft. The first bracket 910 has a first accommodating hole 912. The first shaft portion 811 of the first gear shaft is located in the first accommodating hole 912 and is rotatably connected to the first accommodating hole 912.

[0114] Exemplarily, as Figure 13 shown, the first bracket 910 may include a first rotating hole 911. The first shaft portion 711 of the driving gear shaft passes through the first rotating hole 911, and the first shaft portion 711 of the driving gear shaft is in clearance fit with the first rotating hole 911, so that the first bracket 910 can rotate relative to the first shaft portion 711 of the driving gear shaft.

[0115] The first accommodating hole 912 and the first rotating hole 911 are arranged at intervals. The first shaft portion 811 of the first gear shaft can pass through the first accommodating hole 912, and the first shaft portion 811 of the first gear shaft is in clearance fit with the first accommodating hole 912, so that the first shaft portion 811 of the first gear shaft can rotate relative to the first bracket 910.

[0116] As described in the above embodiments, the first planetary gear set 801 may include a plurality of first planetary gears 810 arranged along the circumferential direction of the first axis S1. The first planetary gear 810 includes a first gear shaft 810a, that is, a plurality of first gear shafts 810a can be arranged along the circumferential direction of the first axis S1. In some examples, the number of the first accommodating holes 912 may be multiple, and the multiple first accommodating holes 912 are arranged along the circumferential direction of the first rotating hole 911. The number of the first accommodating holes 912 can be set correspondingly according to the number of the first gear shafts 810a, so that the first shaft portion 811 of one first gear shaft passes through one first accommodating hole 912, thereby enabling a plurality of first gear shafts 810a to rotate relative to the first bracket 910 and enabling a plurality of first gear shafts 810a to rotate relative to the first shaft portion 711 of the driving gear shaft.

[0117] In some embodiments, the first gear 500 may include an internal gear ring, and the first gear 500 is sleeved outside the first planetary gear 810. Through the above arrangement, the first gear 500, the first planetary gear 810, the first bracket 910, and the driving gear 700 can jointly form a planetary gear train. In this planetary gear train, the driving gear 700 can be a sun gear, the first bracket 910 can be a planet carrier, the plurality of first planetary gears 810 in the first planetary gear set 801 can be a plurality of planet gears, and the first gear 500 can be a ring gear. By setting the first gear 500 as an internal gear ring, it is convenient for the structural compactness of the above planetary gear 800 train and is beneficial to improving the assembly stability of the first planetary gear 810.

[0118] Among them, the maximum distance between the circumferential surface of the first shaft portion 811 of the first gear shaft and the first axis S1 is greater than the distance between the circumferential surface of the first bracket 910 and the first axis S1; for example, the hole wall of the first receiving hole 912 can be adjacent to the circumferential surface of the first bracket 910, so that the first shaft portion 811 of the first gear shaft can extend beyond the circumferential surface of the first bracket 910. Through the above arrangement, during the rotation of the first bracket 910 around the first axis S1, interference between the first bracket 910 and the first gear 500 is avoided, which is beneficial to further realizing the miniaturization of the rotating mechanism 10.

[0119] Continue to refer to Figures 8 to 13 , the rotating mechanism 10 may further include a second bracket 920. The second bracket 920 is sleeved on the second shaft portion 712 of the driving gear shaft and is rotatably connected to the second shaft portion 712 of the driving gear shaft. The second bracket 920 has a second receiving hole 922. The first shaft portion 821 of the second gear shaft is located in the second receiving hole 922 and is rotatably connected to the second receiving hole 922.

[0120] Exemplarily, the second bracket 920 may include a second rotating hole 921. The second shaft portion 712 of the driving gear shaft passes through the second rotating hole 921, and the second shaft portion 712 of the driving gear shaft is in clearance fit with the second rotating hole 921, so that the second bracket 920 can rotate relative to the second shaft portion 712 of the driving gear shaft.

[0121] The second receiving hole 922 and the second rotating hole 921 are arranged at intervals. The first shaft portion 811 of the first gear shaft can pass through the first receiving hole 912, and the first shaft portion 811 of the first gear shaft is in clearance fit with the first receiving hole 912, so that the first shaft portion 811 of the first gear shaft can rotate relative to the first bracket 910.

[0122] As described in the above embodiments, the second planetary gear set 802 may include a plurality of second planetary gears 820 arranged along the circumferential direction of the first axis S1. The second planetary gear 820 includes a second gear shaft 820a, that is, a plurality of second gear shafts 820a can be arranged along the circumferential direction of the first axis S1. In some examples, the number of the second receiving holes 922 may be multiple, and the multiple second receiving holes 922 are arranged along the circumferential direction of the second rotating hole 921. The number of the second receiving holes 922 can be set accordingly according to the number of the second gear shafts 820a, so that the first shaft portion 821 of one second gear shaft passes through one second receiving hole 922, thereby enabling a plurality of second gear shafts 820a to rotate relative to the second bracket 920, and a plurality of second gear shafts 820a can rotate relative to the second shaft portion 712 of the driving gear shaft.

[0123] In some embodiments, the second gear 600 may include an internal gear ring, and the second gear 600 is sleeved outside the second planetary gear 820. By setting the first gear 500 as an internal gear ring, it is convenient to improve the structural compactness of the rotating mechanism 10 and is beneficial to improving the assembly stability of the second planetary gear 820.

[0124] Wherein, the maximum distance between the circumferential surface of the first shaft portion 821 of the second gear shaft and the first axis S1 is greater than the distance between the circumferential surface of the second bracket 920 and the first axis S1; for example, the hole wall of the second receiving hole 922 may be adjacent to the circumferential surface of the second bracket 920, so that the first shaft portion 821 of the second gear shaft can extend beyond the circumferential surface of the second bracket 920. Through the above settings, during the rotation of the second bracket 920 around the first axis S1, interference between the second bracket 920 and the second gear 600 is avoided, which is beneficial to further miniaturize the rotating mechanism 10.

[0125] Continue to refer to Figures 8 to 13 , the rotating mechanism 10 may further include a third bracket 930. The third bracket 930 is located between the first bracket 910 and the second bracket 920. The third bracket 930 is sleeved on the second shaft portion 712 of the driving gear shaft and is rotatably connected to the second shaft portion 712 of the driving gear shaft.

[0126] Exemplarily, the third bracket 930 may include a third rotating hole 931. The second shaft portion 712 of the driving gear shaft passes through the third rotating hole 931, and the second shaft portion 712 of the driving gear shaft is in clearance fit with the third rotating hole 931, so that the third bracket 930 can rotate relative to the second shaft portion 712 of the driving gear shaft.

[0127] The third bracket 930 has a third receiving hole 932. The second shaft portion 812 of the first gear shaft is located in the third receiving hole 932 and is rotatably connected to the third receiving hole 932. The second shaft portion 822 of the second gear shaft is located in the third receiving hole 932 and is rotatably connected to the third receiving hole 932.

[0128] Exemplarily, the third receiving hole 932 and the third rotating hole 931 are spaced apart. The second shaft portion 812 of the first gear shaft can pass through the third receiving hole 932, and the second shaft portion 812 of the first gear shaft is in clearance fit with the third receiving hole 932, so that the second shaft portion 812 of the first gear shaft can rotate relative to the third bracket 930. Similarly, the second shaft portion 822 of the second gear shaft can pass through the third receiving hole 932, and the second shaft portion 822 of the second gear shaft is in clearance fit with the third receiving hole 932, so that the second shaft portion 822 of the second gear shaft can rotate relative to the third bracket 930.

[0129] Continue to refer to Figure 13, the second shaft portion 812 of the first gear shaft has a first mating surface N1. The first mating surface N1 intersects with a reference surface M, and the reference surface M is perpendicular to the first axis S1. The second shaft portion 822 of the second gear shaft has a second mating surface N2. The second mating surface N2 intersects with the reference surface M, and the first mating surface N1 and the second mating surface N2 are in contact.

[0130] Exemplarily, the first mating surface N1 can be a plane, and the first mating surface N1 can be perpendicular to the reference surface M. Correspondingly, the second mating surface N2 can also be a plane, and the second mating surface N2 can also be perpendicular to the reference surface M. The number of the third accommodating holes 932 can be multiple, and the multiple third accommodating holes 932 are arranged along the circumferential direction of the third rotating hole 931. The second shaft portion 812 of one first gear shaft and the second shaft portion 822 of one second gear shaft are jointly inserted into the same third accommodating hole 932. And, since the first mating surface N1 and the second mating surface N2 are in contact, within the same third accommodating hole 932, when the second shaft portion 812 of the first gear shaft rotates relative to the third accommodating hole 932, the first mating surface N1 pushes the second mating surface N2 to move, so that the second shaft portion 822 of the second gear shaft also rotates relative to the third accommodating hole 932. And, the rotation directions of the first gear shaft 810a and the second gear shaft 820a can be the same.

[0131] The embodiments of the present application do not limit the specific shapes of the first mating surface N1 and the second mating surface N2. For example, the first mating surface N1 can further include an arc surface. Correspondingly, the second mating surface N2 can also include an arc surface that matches the first mating surface N1.

[0132] Or, the second shaft portion 822 of the second gear shaft and the second shaft portion 812 of the first gear shaft can further include other mating connection structures to connect the second shaft portion 822 of the second gear shaft and the second shaft portion 812 of the first gear shaft together. The embodiments of the present application do not limit the specific structures of the second shaft portion 822 of the second gear shaft and the second shaft portion 812 of the first gear shaft.

[0133] Based on the above structure, continue to refer to Figure 8 , the elastic friction assembly 300 can further include a first connecting member 330, and the first connecting member 330 can be located between the first gear 500 and the friction plate 310. Figure 14 It is an exploded view of the structure of a first connecting member 330 and a first gear 500 provided by the embodiments of the present application. Combining Figure 8 and Figure 14 as shown, the first connecting member 330 has a protruding first bump 413, and the first bump 413 extends into the first groove 501 of the first gear 500.

[0134] Exemplarily, the first connecting member 330 may include a first rotating portion 411 and a first engaging portion 412, and the first engaging portion 412 is located between the first sleeve 511 and the first gear 500. Among them, the first rotating portion 411 may be sleeved on the second shaft portion 712 of the driving gear shaft, and the first rotating portion 411 is located between the friction plate 310 and the second shaft portion 712 of the driving gear shaft. The first rotating portion 411 is also located between the spring piece and the second shaft portion 712 of the driving gear shaft. The first engaging portion 412 has a protruding first bump 413, and the first engaging portion 412 and the first gear 500 are connected by the first bump 413 and the first groove 501. Through the above arrangement, when the first gear 500 rotates around the first axis S1, the first connecting member 330 also rotates around the first axis S1. Since the engaging portion of the first connecting member 330 is located between the first gear 500 and the friction plate 310, it is avoided that the friction plate 310 is in direct contact with the first gear 500, which is beneficial to avoiding wear of the first gear 500.

[0135] In some examples, the first connecting member 330 may have a plurality of first bumps 413, and the plurality of first bumps 413 may be uniformly arranged along the circumferential direction of the first connecting member 330. Correspondingly, the first gear 500 may have a plurality of first grooves 501, and the plurality of first grooves 501 may be uniformly arranged along the circumferential direction of the first gear 500. One first bump 413 may be located in one first groove 501, so that the first bump 413 and the first groove 501 can be in one-to-one correspondence. Through the above arrangement, it is beneficial to further improve the connection reliability between the first connecting member 330 and the first gear 500.

[0136] In some embodiments, with continued reference to Figure 8 , the rotating mechanism 10 may further include a second connecting member 420, and the second planetary gear 820 may be located between the second connecting member 420 and the first planetary gear 810. Figure 15 FIG. is an exploded view of the structure of a second connecting member 420 and a second gear 600 provided by an embodiment of the present application. With reference to Figure 15 shown, the second connecting member 420 may have a second bump 423, and the second bump 423 may extend into the second groove 601 of the second gear 600.

[0137] Exemplarily, the second connecting member 420 may include a second rotating portion 421 and a second engaging portion 422, and the second engaging portion 422 is located between the second rotating portion 421 and the second gear 600. The second engaging portion 422 has a protruding second bump 423, and the second engaging portion 422 and the second gear 600 are connected by the second bump 423 and the second groove 601. Through the above arrangement, when the second gear 600 rotates around the first axis S1, the second connecting member 420 also rotates around the first axis S1.

[0138] In the actual application process, the second connecting member 420 can be connected to the second structural member so that the second connecting member 420 can drive the second structural member to rotate.

[0139] In some examples, the second connecting member 420 can have a plurality of second bumps 423, and the plurality of second bumps 423 can be uniformly arranged along the circumferential direction of the second connecting member 420. Correspondingly, the second gear 600 can have a plurality of second grooves 601, and the plurality of second grooves 601 can be uniformly arranged along the circumferential direction of the second gear 600. One second bump 423 can be located in one second groove 601 so that the second bump 423 and the second groove 601 can be in one-to-one correspondence. Through the above arrangement, it is beneficial to further improve the connection reliability between the second connecting member 420 and the second gear 600.

[0140] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, thinking of changes or substitutions, should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A rotating mechanism, characterized in that, Comprising: A drive gear, the central axis of the drive gear being the first axis; A planetary gear meshing with the drive gear; A first gear, the first gear meshing with the planetary gear, the central axis of the first gear being the first axis; A second gear, the second gear meshing with the planetary gear, the central axis of the second gear being the first axis, the number of teeth of the second gear being different from the number of teeth of the first gear; When the rotating mechanism is in the automatic mode state, the drive gear rotates around the first axis, the planetary gear rotates around its own central axis, and the planetary gear rotates around the first axis, the second gear rotates around the first axis, and the first gear is stationary; When the rotating mechanism is in the state where the automatic mode and the manual mode coexist, the second gear rotates around the first axis, the planetary gear rotates around its own central axis, and the planetary gear rotates around the first axis, the drive gear rotates around the first axis, and the first gear rotates around the first axis.

2. The rotating mechanism according to claim 1, wherein The rotating mechanism further includes a housing and an elastic friction assembly. The housing covers the planetary gear, the first gear, and the second gear. The elastic friction assembly is between the first gear and the housing. In the extending direction of the first axis, the first end of the first gear contacts the housing, the second end of the first gear abuts against the first end of the elastic friction assembly, and the second end of the elastic friction assembly abuts against the housing.

3. The rotating mechanism according to claim 2, wherein, The elastic friction assembly includes an elastic member and a friction plate. The friction plate is located between the first gear and the elastic member. In the extending direction of the first axis, the first end of the elastic member abuts against the friction plate; The second end of the elastic friction assembly abuts against the housing, including: the second end of the elastic member abuts against the housing.

4. The rotating mechanism according to claim 3, characterized in that When the rotating mechanism is in the automatic mode state, in the extending direction of the first axis, the size of the elastic member is the first size; When the rotating mechanism is in the state where the automatic mode and the manual mode coexist, in the extending direction of the first axis, the size of the elastic member is the second size, and the second size is equal to the first size.

5. The rotating mechanism according to claim 4, characterized in that, When the rotating mechanism is in the manual mode state, the second gear rotates around the first axis, the planetary gear rotates around its own central axis, and the planetary gear rotates around the first axis, the first gear rotates around the first axis, and the drive gear is stationary; In the extending direction of the first axis, the size of the elastic member is the third size, and the third size is equal to the first size.

6. The rotating mechanism according to any one of claims 3-5, characterized in that, The elastic friction assembly further includes a first connecting member. The first connecting member is located between the first gear and the friction plate. The first connecting member has a protruding first bump, and the first bump extends into the first groove of the first gear.

7. The rotating mechanism according to any one of claims 1-6, characterized in that, The planetary gear includes a first planetary gear set and a second planetary gear set. The first planetary gear set includes a plurality of first planetary gears circumferentially arranged along the first axis. The first planetary gears mesh with the first gear and also mesh with the drive gear. The second planetary gear set includes a plurality of second planetary gears circumferentially arranged along the first axis. The second planetary gears mesh with the second gear. In the reference direction, the first planetary gear and the second planetary gear are connected, and the central axes of the first planetary gear and the second planetary gear coincide. The reference direction is parallel to the first axis and does not coincide with the extension direction of the first axis.

8. The rotating mechanism according to claim 7, wherein The first planetary gear includes a first gear shaft and a second gear shaft. The gear portion of the first gear shaft is located between the first shaft portion and the second shaft portion of the first gear shaft. The gear portion of the second gear shaft is located between the first shaft portion and the second shaft portion of the second gear shaft. In the reference direction, the distance between the first shaft portion of the first gear shaft and the gear portion of the second gear shaft is greater than the distance between the second shaft portion of the first gear shaft and the gear portion of the second gear shaft. The distance between the first shaft portion of the second gear shaft and the gear portion of the first gear shaft is greater than the distance between the second shaft portion of the second gear shaft and the gear portion of the first gear shaft. Among the first planetary gear and the second planetary gear located in the reference direction: the second shaft portion of the first gear shaft is connected to the second shaft portion of the second gear shaft.

9. The rotating mechanism according to claim 8, characterized in that, The drive gear includes a drive gear shaft. The gear portion of the drive gear shaft is located between the first shaft portion and the second shaft portion of the drive gear shaft. The rotating mechanism further includes a first bracket. The first bracket is sleeved on the first shaft portion of the drive gear shaft and is rotatably connected to the first shaft portion of the drive gear shaft. The first bracket has a first accommodation hole. The first shaft portion of the first gear shaft is located in the first accommodation hole and is rotatably connected to the first accommodation hole. The rotating mechanism further includes a second bracket. The second bracket is sleeved on the second shaft portion of the drive gear shaft and is rotatably connected to the second shaft portion of the drive gear shaft. The second bracket has a second accommodation hole. The first shaft portion of the second gear shaft is located in the second accommodation hole and is rotatably connected to the second accommodation hole.

10. The rotating mechanism according to claim 9, characterized in that, The rotating mechanism further includes a third bracket. The third bracket is located between the first bracket and the second bracket. The third bracket is sleeved on the second shaft portion of the drive gear shaft and is rotatably connected to the second shaft portion of the drive gear shaft. The third bracket has a third accommodation hole. The second shaft portion of the first gear shaft is located in the third accommodation hole and is rotatably connected to the third accommodation hole. The second shaft portion of the first gear shaft has a first mating surface. The first mating surface intersects with a reference surface. The reference surface is perpendicular to the first axis. The second shaft portion of the second gear shaft is located within the third receiving hole and is rotatably connected to the third receiving hole. The second shaft portion of the second gear shaft has a second mating surface, the second mating surface intersects with the reference surface, and the first mating surface and the second mating surface are in contact.

11. The rotating mechanism according to claim 9 or 10, characterized in that, The rotating mechanism includes a driving motor and a connecting structure. The driving shaft of the driving motor is connected to the second shaft portion of the driving gear through the connecting structure.

12. The rotating mechanism according to any one of claims 7-11, characterized in that, The number of teeth of the first planetary gear is different from the number of teeth of the second planetary gear.

13. The rotating mechanism according to any one of claims 7-12, characterized in that, The first gear is an internal gear ring, and the first gear is sleeved outside the first planetary gear.

14. The rotating mechanism according to any one of claims 7-13, characterized in that, The second gear is an internal gear ring, and the second gear is sleeved outside the second planetary gear.

15. The rotating mechanism according to any one of claims 7-14, characterized in that, The rotating mechanism further includes a second connecting member. The second planetary gear is located between the second connecting member and the first planetary gear. The second connecting member has a second protrusion, and the second protrusion extends into the second groove of the second gear.

16. A foldable electronic device, characterized in that, Comprising: A first structural member, a second structural member, and a rotating mechanism as described in any one of claims 1-15 above. The transmission shaft of the rotating mechanism is connected to the first structural member, and the second gear of the rotating mechanism is connected to the second structural member.

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