A rotating shaft assembly and a foldable electronic device

Abstract

This application provides a hinge assembly and a foldable electronic device. The hinge assembly includes a pair of torque reversing mechanisms, each including an arc arm and a tension / relaxation concave cam holder. The arc arm has a first concave cam structure and a second concave cam structure at both ends, and the tension / relaxation concave cam holder has a third concave cam structure and a fourth concave cam structure at both ends. In a first state, the second and fourth concave cam structures are separated, and the first and third concave cam structures are engaged, providing torque in a first direction. In a second state, the first and third concave cam structures are separated, and the second and fourth concave cam structures are engaged, providing torque in a second direction. The first and second directions are opposite. By alternately engaging the concave cam sets, the direction of the closing / unfolding holding force is switched, thereby providing assistance to the user in opening or closing the foldable electronic device.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more specifically, to a hinge assembly and a foldable electronic device. Background Technology

[0002] Foldable electronic devices can switch between a folded state and an unfolded state. When folded, they occupy a relatively small space; when unfolded, they can display a larger screen, increasing the user's viewing area.

[0003] Foldable electronic devices require a closing force to maintain their closed state and provide a smooth feel during the closing process. A common current solution uses one or a pair of spring-loaded concave cams or inclined planes on a rotating shaft to maintain the closing torque, supplemented by magnets to maintain the pressed state. However, regardless of whether it's a single concave cam or inclined plane solution, it can only apply a torque in a single direction when the foldable electronic device is almost closed. This single torque, which tends to keep the foldable electronic device closed, can lead to excessive closing force when the user unfolds it. Excessive closing force can create additional resistance when opening the foldable electronic device, making the initial unfolding process very difficult. Summary of the Invention

[0004] This application provides a pivot assembly and a foldable electronic device that can change the torque direction of the foldable electronic device, thereby assisting in the unfolding or closing of the foldable electronic device and improving the user experience.

[0005] In a first aspect, a rotating shaft assembly is provided, comprising a pair of torque reversing mechanisms, each torque reversing mechanism comprising: an arc arm, a tension / relaxation concave cam holder, a first shaft end stop, a second shaft end stop, and a spring, wherein:

[0006] The two ends of the arc arm are respectively provided with a first concave cam structure and a second concave cam structure. The first concave cam structure and the second concave cam structure are arranged along the axial direction and are symmetrically arranged in the direction perpendicular to the axis.

[0007] The tensioning concave cam frame includes a third concave cam structure, a fourth concave cam structure, and a connecting part connecting the third concave cam structure and the fourth concave cam structure. The connecting part is provided with a groove that can accommodate part of the arc arm. The third concave cam structure and the fourth concave cam structure are arranged axially, and there is a phase difference between the third concave cam structure and the fourth concave cam structure.

[0008] The arc arm is a hollow structure. The first concave cam structure has a first through hole, the second concave cam structure has a second through hole, the third concave cam structure has a third through hole, and the fourth concave cam structure has a fourth through hole. The spring passes through the arc arm, the first through hole, the second through hole, the third through hole, and the fourth through hole, and the two ends of the spring are fixedly connected to the first shaft end stop iron and the second shaft end stop iron, respectively.

[0009] The first shaft end stop is located on the side of the third concave cam structure away from the first concave cam structure, and the second shaft end stop is located on the side of the fourth concave cam structure away from the second concave cam structure.

[0010] In the first state, the second concave cam structure is separated from the fourth concave cam structure, and the first shaft end stop iron presses the third concave cam structure under the action of the spring. The first concave cam structure and the third concave cam structure mesh to provide torque in the first direction.

[0011] In the second state, the first concave cam structure separates from the third concave cam structure, and the second shaft end stop iron presses the fourth concave cam structure under the action of the spring. The second concave cam structure meshes with the fourth concave cam structure to provide torque in the second direction, while the first direction and the second direction are opposite.

[0012] It should be noted that the phase difference between the third and fourth concave cam structures can be understood as follows: the tensioning concave cam holder is not a symmetrical structure in the direction perpendicular to the axis. Instead, the third concave cam structure is rotated at a certain angle relative to the fourth concave cam structure, or the fourth concave cam structure is rotated at a certain angle relative to the third concave cam structure. Therefore, there is a certain angle difference (i.e., phase difference) between the third and fourth concave cam structures.

[0013] In this embodiment, by setting two pairs of first concave cam structures, second concave cam structures, third concave cam structures, and fourth concave cam structures, and with the first and third concave cam structures forming a first concave cam group, and the second and fourth concave cam structures forming a second concave cam group, the alternating engagement of the first and second concave cam groups achieves the purpose of switching the direction of the closing / unfolding holding force. In other words, the pivot assembly can provide torque in different directions under different states, switching the direction of the closing / unfolding holding force. This ensures that when the user opens the first and second housings of the foldable electronic device, they will not experience difficulty due to forces contrary to their intended operation; instead, it provides assistance consistent with the intended action direction, improving the user experience.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the torque reversing mechanism further includes a shaft back plate and a shaft support, with a semi-enclosed space formed between the shaft back plate and the shaft support. The semi-enclosed space is used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring.

[0015] In this embodiment, the spindle back plate and the spindle bracket can be fixedly connected, and the two together form a semi-enclosed space to enclose the core motion mechanism. That is, the semi-enclosed space can be used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring, thereby protecting the core motion mechanism.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the torque reversing mechanism further includes a retaining ring, the middle of which is fixedly connected to the back plate of the rotating shaft, and both ends of which are capable of elastic deformation; the connecting part of the tensioning concave cam frame is provided with a first slot and a second slot on the side near the back plate of the rotating shaft, the first slot and the second slot being used to engage the first end and the second end of the retaining ring respectively; wherein, in the first state, the second end of the retaining ring is engaged in the second slot, preventing the second concave cam structure and the fourth concave cam structure from approaching each other, and the first end of the retaining ring rests on the tensioning concave cam frame; in the second state, the first end of the retaining ring is engaged in the first slot, preventing the first concave cam structure and the third concave cam structure from approaching each other, and the second end of the retaining ring rests on the tensioning concave cam frame.

[0017] In this embodiment of the application, by setting a retaining ring, stability can be maintained under different torque directions. That is, by using a retaining ring, a specific state can be effectively maintained, so that the original state will be maintained as long as the user does not actively trigger the state switch.

[0018] In conjunction with the first aspect, in some implementations of the first aspect, the torque reversing mechanism further includes a paddle, on which a first baffle and a second baffle are provided. The first baffle is located between the first shaft end stop and the third concave cam structure, and the second baffle is located between the second shaft end stop and the fourth concave cam structure. When switching from the first state to the second state, the first baffle drives the first shaft end stop to move away from the arc arm. After the paddle pushes the second end of the retaining spring out of the second retaining groove, the second shaft end stop drives the tensioning concave cam frame to move axially under the action of the spring, so that the second concave cam structure and the fourth concave cam structure approach each other, and the first concave cam structure and the third concave cam structure move away from each other.

[0019] It should be noted that in the embodiments of this application, a single reliable mechanical input such as a lever or push rod can be used, which can also serve as the input interface of an electronic control unit, thus systematically solving the control problem of state switching.

[0020] In this embodiment, the torque reversal of the foldable electronic device can be achieved by moving a lever, thus causing the foldable electronic device to tend to unfold or close. The entire process involves a single input, is simple and easy to implement, and is quick and reliable.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the paddle is provided with a protrusion protruding toward the shaft back plate, and a through groove is provided on the shaft back plate at a position corresponding to the protrusion, through which the protrusion can pass.

[0022] In this embodiment of the application, by providing a protrusion on the paddle, and the protrusion being able to pass through the back plate of the rotating shaft, the user can directly contact the protrusion, thereby switching the torque state by moving the protrusion.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, a boss is provided on the arc arm, and the boss is fixedly connected to the mid-frame of the foldable electronic device, so that the arc arm can rotate around an axis.

[0024] In this embodiment of the application, the boss provided on the arc arm can be fixedly connected to the middle frame of the foldable electronic device, so that the arc arm can rotate synchronously with the middle frame around the axis.

[0025] In conjunction with the first aspect, in some implementations of the first aspect, a first fixing hole is provided on the first shaft end stop iron, and a second fixing hole is provided on the second shaft end stop iron. The first fixing hole is used to fix and connect with the first end of the spring, and the second fixing hole is used to fix and connect with the second end of the spring.

[0026] In this embodiment of the application, a fixing hole is provided on the end cap of the shaft to achieve a fixed connection between the spring and the end cap. Of course, other components can also be provided on the end cap, as long as they can achieve a fixed connection between the spring and the end cap.

[0027] Secondly, a rotating shaft assembly is provided, comprising a pair of torque reversing mechanisms, each torque reversing mechanism comprising: an arc arm, a tension / relaxation concave cam holder, a first shaft end stop, a second shaft end stop, and a spring, wherein:

[0028] A semi-enclosed space is formed between the shaft back plate and the shaft bracket. The semi-enclosed space is used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring.

[0029] The two ends of the arc arm are respectively provided with a first concave cam structure and a second concave cam structure. The first concave cam structure and the second concave cam structure are arranged along the axial direction and are symmetrically arranged in the direction perpendicular to the axis.

[0030] The tensioning concave cam frame includes a third concave cam structure, a fourth concave cam structure, and a connecting part connecting the third concave cam structure and the fourth concave cam structure. The connecting part is provided with a groove that can accommodate part of the arc arm. The third concave cam structure and the fourth concave cam structure are arranged axially, and there is a phase difference between the third concave cam structure and the fourth concave cam structure.

[0031] The arc arm is a hollow structure. The first concave cam structure has a first through hole, the second concave cam structure has a second through hole, the third concave cam structure has a third through hole, and the fourth concave cam structure has a fourth through hole. The spring passes through the arc arm, the first through hole, the second through hole, the third through hole, and the fourth through hole, and the two ends of the spring are fixedly connected to the first shaft end stop iron and the second shaft end stop iron, respectively.

[0032] The arc arm includes a main body, a first shoulder and a second shoulder. The first shoulder is located on the side of the main body close to the first concave cam structure, and the second shoulder is located on the side of the main body close to the third concave cam structure.

[0033] The first shaft end stop includes a first stop block, and the second shaft end stop includes a second stop block. The first stop block can abut against the first shaft shoulder, and the second stop block can abut against the second shaft shoulder.

[0034] In the first state, the second concave cam structure is separated from the fourth concave cam structure, and the second stop on the second shaft end stop is pressed against the second shoulder on the arc arm under the action of the spring, so that the first concave cam structure meshes with the third concave cam structure to provide torque in the first direction;

[0035] In the second state, the first concave cam structure separates from the third concave cam structure, and the first stop on the first shaft end stop presses against the first shoulder on the arc arm under the action of the spring, so that the second concave cam structure meshes with the fourth concave cam structure to provide torque in the second direction, the first direction being opposite to the second direction.

[0036] It should be noted that the phase difference between the third and fourth concave cam structures can be understood as follows: the tensioning concave cam holder is not a symmetrical structure in the direction perpendicular to the axis. Instead, the third concave cam structure is rotated at a certain angle relative to the fourth concave cam structure, or the fourth concave cam structure is rotated at a certain angle relative to the third concave cam structure. Therefore, there is a certain angle difference (i.e., phase difference) between the third and fourth concave cam structures.

[0037] In this embodiment, by setting two pairs of first concave cam structures, second concave cam structures, third concave cam structures, and fourth concave cam structures, and with the first and third concave cam structures forming a first concave cam group, and the second and fourth concave cam structures forming a second concave cam group, the alternating engagement of the first and second concave cam groups achieves the purpose of switching the direction of the closing / unfolding holding force. In other words, the pivot assembly can provide torque in different directions under different states, switching the direction of the closing / unfolding holding force. This ensures that when the user opens the first and second housings of the foldable electronic device, they will not experience difficulty due to forces contrary to their intended operation; instead, it provides assistance consistent with the intended action direction, improving the user experience.

[0038] In conjunction with the second aspect, in some implementations of the second aspect, the torque reversing mechanism further includes a shaft back plate and a shaft support, with a semi-enclosed space formed between the shaft back plate and the shaft support. The semi-enclosed space is used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring.

[0039] In this embodiment, the spindle back plate and the spindle bracket can be fixedly connected, and the two together form a semi-enclosed space to enclose the core motion mechanism. That is, the semi-enclosed space can be used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring, thereby protecting the core motion mechanism.

[0040] In conjunction with the second aspect, in some implementations of the second aspect, the torque reversing mechanism further includes a retaining ring, the middle of which is fixedly connected to the back plate of the rotating shaft, and both ends of the retaining ring are capable of elastic deformation; a first sliding groove and a second sliding groove are provided along the circumferential direction of the arc arm, the first sliding groove being provided on the side of the main body near the first concave cam structure, and the second sliding groove being provided on the side of the main body near the second concave cam structure, the first sliding groove and the second sliding groove being used to engage the first end and the second end of the retaining ring, respectively; wherein, in the first state, the second end of the retaining ring is engaged in the second sliding groove, preventing the second concave cam structure and the fourth concave cam structure from approaching each other, and the first end of the retaining ring rests on the arc arm; in the second state, the first end of the retaining ring is engaged in the first sliding groove, preventing the first concave cam structure and the third concave cam structure from approaching each other, and the second end of the retaining ring rests on the arc arm.

[0041] In this embodiment of the application, by setting a retaining ring, stability can be maintained under different torque directions. That is, by using a retaining ring, a specific state can be effectively maintained, so that the original state will be maintained as long as the user does not actively trigger the state switch.

[0042] In conjunction with the second aspect, in some implementations of the second aspect, the torque reversing mechanism further includes a paddle, on which a first baffle and a second baffle are provided. The first baffle is located between the arc arm and the first concave cam structure, and the second baffle is located between the arc arm and the second concave cam structure. When switching from the first state to the second state, the second baffle drives the second shaft end stop iron to move away from the arc arm. After the paddle pushes the second end of the retaining spring out of the second slide groove, the first stop block moves axially against the first shoulder of the arc arm under the action of the spring, so that the second concave cam structure and the fourth concave cam structure approach each other, and the first concave cam structure and the third concave cam structure move away from each other.

[0043] It should be noted that in the embodiments of this application, a single reliable mechanical input such as a lever or push rod can be used, which can also serve as the input interface of an electronic control unit, thus systematically solving the control problem of state switching.

[0044] In this embodiment, the torque reversal of the foldable electronic device can be achieved by moving a lever, thus causing the foldable electronic device to tend to unfold or close. The entire process involves a single input, is simple and easy to implement, and is quick and reliable.

[0045] In conjunction with the second aspect, in some implementations of the second aspect, the paddle is provided with a protrusion protruding toward the shaft back plate, and a through groove is provided on the shaft back plate at a position corresponding to the protrusion, through which the protrusion can pass.

[0046] In this embodiment of the application, by providing a protrusion on the paddle, and the protrusion being able to pass through the back plate of the rotating shaft, the user can directly contact the protrusion, thereby switching the torque state by moving the protrusion.

[0047] In conjunction with the second aspect, in some implementations of the second aspect, a boss is provided on the arc arm, and the boss is fixedly connected to the mid-frame of the foldable electronic device, so that the arc arm can rotate around the axis.

[0048] In this embodiment of the application, the boss provided on the arc arm can be fixedly connected to the middle frame of the foldable electronic device, so that the arc arm can rotate synchronously with the middle frame around the axis.

[0049] In conjunction with the second aspect, in some implementations of the second aspect, a first fixing hole is provided on the first shaft end stop iron, and a second fixing hole is provided on the second shaft end stop iron. The first fixing hole is used to fix and connect with the first end of the spring, and the second fixing hole is used to fix and connect with the second end of the spring.

[0050] In this embodiment of the application, a fixing hole is provided on the end cap of the shaft to achieve a fixed connection between the spring and the end cap. Of course, other components can also be provided on the end cap, as long as they can achieve a fixed connection between the spring and the end cap.

[0051] Thirdly, a foldable electronic device is provided, the electronic device comprising: a first housing; a second housing; a hinge assembly as described in the first aspect and any implementation thereof, or a hinge assembly as described in the second aspect and any implementation thereof; the hinge assembly being connected between the first housing and the second housing.

[0052] In conjunction with the third aspect, in some implementations of the third aspect, the foldable electronic device further includes a foldable display screen, which includes a first display unit and a second display unit, the first display unit being connected to a first housing and the second display unit being connected to a second housing.

[0053] It should be noted that the beneficial effects of the third aspect can be referenced from the beneficial effects of the first or second aspect, and will not be repeated here. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the foldable electronic device provided in the embodiments of this application.

[0055] Figure 2 This is a schematic diagram of the torque commutation mechanism provided in the embodiments of this application.

[0056] Figure 3 This is a partial structural schematic diagram of the torque commutation mechanism provided in the embodiments of this application.

[0057] Figure 4 This is a partial structural schematic diagram of the torque commutation mechanism provided in the embodiments of this application.

[0058] Figure 5 This is a partial structural schematic diagram of the torque commutation mechanism provided in the embodiments of this application.

[0059] Figure 6 This is a schematic diagram of the unfolding and closing of the foldable electronic device provided in the embodiments of this application.

[0060] Figure 7 This is a schematic diagram of the torque reversing mechanism switching direction provided in the embodiments of this application.

[0061] Figure 8 This is a schematic diagram of the torque reversing mechanism switching direction provided in the embodiments of this application.

[0062] Figure 9 This is a schematic diagram of the arc arm provided in the embodiment of this application.

[0063] Figure 10 These are schematic diagrams of the torque commutation mechanism provided in this application under different states. Detailed Implementation

[0064] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0065] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more. The singular expressions "a," "an," "described," "the," "this," and "this" are intended to also include expressions such as "one or more," unless the context explicitly indicates otherwise. The sequence numbers of the processes below do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. For example, in the embodiments of this application, the words "100," "200," and "300" are merely identifiers for descriptive convenience and do not limit the order of execution steps.

[0066] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0067] In the description of the embodiments of this application, the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship relative to the orientation or position of the components shown in the drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and not to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They can change accordingly depending on the orientation of the components in the drawings, and therefore should not be construed as limiting this application.

[0068] For ease of description in the following embodiments, an xyz coordinate system is established for the foldable electronic device in its unfolded state. The axial direction of the foldable electronic device is defined as the x-direction, and the y and z directions are perpendicular to the axial direction of the foldable electronic device. The z-direction can be the thickness direction of the foldable electronic device. It is understood that the coordinate system settings of the foldable electronic device can be flexibly configured according to actual needs, and are not specifically limited here.

[0069] Figure 1 This is a schematic diagram of the structure of a foldable electronic device 10 provided in an embodiment of this application. The foldable electronic device 10 can be an electronic device with folding function, such as a mobile phone, tablet computer, e-reader, laptop computer, or wearable device. Figure 1 The illustrated embodiment uses a foldable phone as an example.

[0070] refer to Figure 1 The foldable electronic device 10 may include a flexible display screen (not shown), a first housing 100, a second housing 200, and a hinge assembly 300.

[0071] The flexible display screen is positioned above the first housing 100, the second housing 200, and the hinge assembly 300, which support the flexible display screen. It should be understood that the flexible display screen can be highly flexible and bendable, providing users with a new interaction method based on its bendable characteristics. The display panel of the flexible display screen can be, for example, any one of the following: liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode (AMOLED), flex light-emitting diode (FLED), quantum dot light-emitting diode (QLED), etc. This application embodiment does not limit this choice.

[0072] The flexible display screen may include a first display section corresponding to the first housing 100, a second display section corresponding to the second housing 200, and a foldable display section corresponding to the hinge assembly 300. The foldable display section may be connected between the first display section and the second display section.

[0073] The first housing 100 may consist of a first side frame and a first cover. The first side frame may surround the outer periphery of the first cover and the outer periphery of the first display unit. The first display unit may be arranged parallel to and spaced apart from the first cover, and the first display unit and the first cover may be located on opposite sides of the first side frame. The space between the first display unit and the first cover may be used to house components of the foldable electronic device 10, such as antennas, circuit board assemblies, etc.

[0074] The second housing 200 may consist of a second side frame and a second cover. The second side frame may surround the outer periphery of the second cover and the outer periphery of the second display unit. The second display unit may be arranged parallel to and spaced apart from the second cover, and the second display unit and the second cover may be located on opposite sides of the second side frame. The space between the second display unit and the second cover may be used to house components of the foldable electronic device 10, such as antennas, circuit board assemblies, etc.

[0075] In one embodiment provided in this application, the cover and the side frame can be two parts of the housing of the foldable electronic device 10. The cover and the side frame can be connected, and the connection method does not have to be an assembly method such as snap-fit, adhesive, welding, riveting, or clearance fit. The connection between the cover and the side frame is usually difficult to separate. In another embodiment provided in this application, the cover and the side frame can be two different components. By assembling the cover and the side frame together, the housing of the foldable electronic device 10 can be formed.

[0076] The hinge assembly 300 can be connected between the first housing 100 and the second housing 200. The foldable display portion of the flexible display screen can abut against the surface of the hinge assembly 300. When the foldable electronic device 10 is in the unfolded state, the foldable display portion of the flexible display screen and the hinge assembly 300 are stacked. Under the action of the hinge assembly 300, the first housing 100 and the second housing 200 can move closer to each other or further away from each other. Correspondingly, the first display portion and the second display portion of the flexible display screen can move closer to each other or further away from each other, so that the flexible display screen can be folded or unfolded, that is, the foldable electronic device 10 is in a folded state or an unfolded state.

[0077] In this application, when the foldable electronic device 10 is in the unfolded state (flattened state), the angle between the first housing 100 and the second housing 200 can be approximately 180°. The foldable electronic device 10 being in the folded state means that the foldable electronic device 10 is currently bent, and the degree of bending of the foldable electronic device 10 is at its maximum. At this time, the first cover and the second cover can be arranged parallel to each other, spaced apart from each other, and facing each other, with the distance between the first cover and the second cover being minimal. At least a portion of the first housing 100 and the second housing 200 are housed within the space enclosed by the flexible display screen; the first display unit, the first housing 100, the second housing 200, and the second display unit are sequentially stacked. Similarly, the first display unit and the second display unit can be arranged parallel to each other, spaced apart from each other, and facing each other (the distance between the first cover and the second cover is less than the distance between the first display unit and the second display unit). At this time, the first display unit and the second display unit can be considered to be located on different planes.

[0078] The foldable electronic device 10 can be in a folded state, either in an inward-folded state or an outward-folded state. When the foldable electronic device 10 is in the inward-folded state, the first cover and the second cover can be close to each other, and the first display unit and the second display unit can be close to each other. The first cover, the second cover, and the hinge assembly 300 can form a receiving area for accommodating the flexible display screen. That is, the flexible display screen can be housed within the space between the first cover and the second cover. When the foldable electronic device 10 is in the outward-folded state, the first cover and the second cover can be close to each other, and the first display unit and the second display unit can be close to each other. The first display unit, the second display unit, and the foldable display unit can form a receiving area for accommodating the first cover, the second cover, and the hinge assembly 300. That is, the first cover, the second cover, and the hinge assembly 300 can be housed within the space between the first display unit and the second display unit.

[0079] Understandably, whether the foldable electronic device 10 is in an inward or outward folded state, it requires a closing force to maintain its closed state and the feel during the closing process. A common current solution is to use one or a pair of spring-loaded concave cams or inclined planes on a rotating shaft to maintain the closing torque, supplemented by magnets to maintain the pressed state. However, regardless of the single concave cam or inclined plane solution, it can only apply a torque in a single direction when the foldable electronic device 10 is almost closed (or at an angle), even if the first housing 100 and the second housing 200 tend towards the closing direction. However, this single torque that tends to keep the foldable electronic device 10 closed may result in excessive closing force when the user unfolds it, potentially affecting the unfolding feel. Excessive closing force creates additional resistance when the user opens the foldable electronic device 10, making the initial unfolding process very difficult.

[0080] Therefore, in response to the current problem of not being able to adjust the direction of the closing force, this application provides a pivot assembly and a foldable electronic device that can adjust the direction of the closing force (or closing torque) of the foldable electronic device. This allows the device to provide a pre-opening force or pre-closing force when the user unfolds or closes the foldable electronic device, thus assisting in the unfolding or closing of the foldable electronic device and avoiding affecting its unfolding or closing, thereby improving the user experience.

[0081] Continue to refer Figure 1 The rotating shaft assembly 300 provided in this application embodiment may include a main shaft 400 and a pair of torque reversing mechanisms 500 (i.e., torque reversing mechanism 500A and torque reversing mechanism 500B). The main shaft 400 is fixedly connected to the torque reversing mechanism 500. The torque reversing mechanism 500 can be used to convert the torque in a first direction when the rotating shaft assembly 300 rotates into the torque in a second direction. The first direction and the second direction are opposite directions. For example, the first direction can be an unfolding direction and the second direction can be a closing direction.

[0082] The following will combine Figures 2 to 5 This paper describes each component of the torque commutation mechanism 500 according to an embodiment of the present application, as well as the connection relationships between the components. Furthermore, since the components in each torque commutation mechanism 500 are identical, for ease of description and brevity, the torque commutation mechanism 500A will be used as an example to describe the components in the torque commutation mechanism.

[0083] It should be understood that Figures 2 to 5 The schematic structural diagrams of the torque reversing mechanism and its components shown are for illustrative purposes only. Any modified implementation or connection method is within the protection scope of the embodiments of this application.

[0084] refer to Figure 2 and Figure 3 It can be seen that the torque reversing mechanism 500 may include torque reversing mechanism 500A and torque reversing mechanism 500B, and torque reversing mechanism 500A and torque reversing mechanism 500B are centrally symmetrical about the center of the rotating shaft. The torque reversing mechanism 500 may include two rotating shaft back plates 510, two rotating shaft supports 520 corresponding to the two rotating shaft back plates 510, a pair of arc arms 530, a pair of tension / relaxation concave cam supports 540, two pairs of shaft end sears 550, two springs 560, a pair of retaining rings 570, and a pair of levers 580. In other words, the torque reversing mechanism 500A may include a shaft back plate 510A, a shaft support 520A corresponding to the shaft back plate 510A, an arc arm 530A, a tension / relaxation concave cam frame 540A, shaft end stop 550A-1, shaft end stop 550A-2, a spring 560A, a retaining ring 570A, and a paddle 580A; the torque reversing mechanism 500B may include a shaft back plate 510B, a shaft support 520B corresponding to the shaft back plate 510B, an arc arm 530B, a tension / relaxation concave cam frame 540B, shaft end stop 550B-1, shaft end stop 550B-2, a spring 560B, a retaining ring 570B, and a paddle 580B. The following will combine... Figures 2 to 5 This document provides a detailed description of each component of the torque commutation mechanism 500.

[0085] 510 Spindle backplate

[0086] The structure of the pivot backplate 510 can be referenced. Figure 3 and Figure 4 The hinge back plate 510 may include hinge back plate 510A and hinge back plate 510B. Hinges 510A and hinge back plate 510B may be arranged side by side along the y direction, and the side of hinge back plate 510 away from hinge bracket 520 is fixedly connected to main shaft 300. The y direction is the direction perpendicular to the axis of foldable electronic device 10.

[0087] In some embodiments, the pivot back plate 510 may be provided with a through groove, which can be used to accommodate a protrusion on the paddle 580, that is, the protrusion on the paddle 580 can pass through the through groove. For example, as shown... Figure 4 As shown, a through groove 511A may be provided on the shaft back plate 510A, and the protrusion 581A on the paddle 580A can pass through the through groove 511A.

[0088] 520 Spindle Bracket

[0089] The structure of the 520 pivot bracket can be referenced. Figure 2 and Figure 4The pivot bracket 520 may include pivot bracket 520A and pivot bracket 520B. The pivot bracket 520A and pivot bracket 520B may be arranged side by side along the y direction, and pivot bracket 520A corresponds to pivot back plate 510A, and pivot bracket 520B corresponds to pivot back plate 510B.

[0090] In some embodiments, the shaft bracket 520 is fixedly connected to the shaft back cover 510, and the two together form a semi-enclosed space that encloses the core motion mechanism. That is, the semi-enclosed space can be used to accommodate the arc arm 530, the tensioning concave cam bracket 540, the shaft end stop 550, and the spring 560. For example, the shaft bracket 520 has a semi-arc structure. The semi-arc structure of the shaft bracket 520 and the shaft back cover 510 can form a semi-enclosed accommodating space, which can accommodate other components of the torque reversing mechanism 500 (such as the tensioning concave cam bracket 540, the shaft end stop 550, the spring 560, etc.).

[0091] In some embodiments, the middle portion of the pivot bracket 520 may be partially hollowed out, with the hollowed-out portion corresponding to the boss on the arc arm 530, allowing the arc arm 530 to rotate around the axis. It should be understood that... Figure 2 The torque reversing mechanism 500 shown is a structural schematic diagram of the foldable electronic device 10 in the closed state. That is, when the foldable electronic device 10 is in the folded state, the boss on the arc arm 243 is parallel to the z direction. When the foldable electronic device 10 is unfolded, the arc arm 530 will rotate to both sides along the area cut out by the rotating shaft bracket 520, that is, the boss rotates around the x direction.

[0092] Arc arm 530

[0093] The structure of the arc arm 530 can be referenced. Figure 3 and Figure 5 The arc arm 530 can rotate about a direction perpendicular to the axis (i.e., the y direction) and can be used to transmit closing force or opening force. The arc arm 530 may include arc arm 530A and arc arm 530B.

[0094] In some embodiments, the main body of the arc arm 530 can be a hollow cylindrical structure, with concave cam structures at both ends of the cylindrical structure. The protrusions on the concave cam structures can abut against the recesses on the tensioning concave cam holder 540, and vice versa. For example, the arc arm 530 has a first concave cam structure and a second concave cam structure at both ends. The first and second concave cam structures are arranged axially and symmetrically about the y-axis. Figure 5As shown, concave cam structures 531A and 532A can be provided at both ends of the arc arm 530A. The arc arm 530A is a hollow structure, and the spring 560A can pass through the hollow part of the arc arm 530A. Alternatively, the arc arm 530A can be understood as a hollow structure, with the concave cam structure 531A having a first through hole (not shown in the figure) and the concave cam structure 532A having a second through hole (not shown in the figure), and the spring 560A being able to pass through the hollow part of the arc arm 530A, the first through hole, and the second through hole.

[0095] In some embodiments, a boss may be provided on the main body of the arc arm 530, and the boss may have a positioning hole, which can be fixedly connected to the first housing 100 or the second housing 200. For example, Figure 5 As shown, a boss 533A may be provided on the main body of the arc arm 530A. The boss 533A may have a positioning hole. The arc arm 530A can be fixedly connected to the first housing 100 or the second housing 200 through the positioning hole, so that the arc arm 530A can rotate around the axis with the first housing 100 or the second housing 200.

[0096] 540 tension concave cam holder

[0097] The structure of the tension-relaxation concave cam holder 540 can be referenced. Figure 3 and Figure 5 The tensioning concave cam holder 540 includes tensioning concave cam holder 540A and tensioning concave cam holder 540B.

[0098] In some embodiments, the tensioning concave cam holder 540 may include a third concave cam structure, a fourth concave cam structure, and a connecting portion connecting the third and fourth concave cam structures. The connecting portion has a groove for accommodating the arc arm 530. It should be understood that the length of the groove along the x-direction is greater than the length of the arc arm 530 along the x-direction, thereby causing the concave cam structures on the arc arm 530 to alternately engage with the concave cam structures on the tensioning concave cam holder 540. It should also be understood that the third and fourth concave cam structures may be axially arranged, and there is a phase difference between them. That is, in the direction perpendicular to the axis (i.e., the y-direction), the tensioning concave cam holder 540 is not a symmetrical structure; rather, the third concave cam structure is rotated at a certain angle relative to the fourth concave cam structure, or vice versa. Therefore, there is a certain angular difference (i.e., a phase difference) between the third and fourth concave cam structures.

[0099] It should be understood that the two ends of the tensioning concave cam holder 540 facing the side of the arc arm 530 may be provided with concave cam structures, and the recessed part of the concave cam structure on the tensioning concave cam holder 540 can abut against the protrusion on the concave cam structure on the arc arm 530, and the protrusion on the concave cam holder structure on the tensioning concave cam holder 540 can abut against the recessed part of the concave cam structure on the arc arm 530.

[0100] For example, such as Figure 5 As shown, the tensioning concave cam frame 540A is provided with a concave cam structure 541A and a concave cam structure 542A. The concave cam structure 541A can be used in conjunction with the concave cam structure 531A on the arc arm, and the concave cam structure 542A can be used in conjunction with the concave cam structure 532A on the arc arm. In other words, when the concave cam structure 541A abuts against the concave cam structure 531A, the recessed portion on the concave cam structure 541A can abut against the protruding portion on the concave cam structure 531A, and the protruding portion on the concave cam structure 541A can abut against the recessed portion on the concave cam structure 531A, and the concave cam structure 542A separates from the concave cam structure 532A; when the concave cam structure 542A abuts against the concave cam structure 532A, the recessed portion on the concave cam structure 542A can abut against the protruding portion on the concave cam structure 532A, and the protruding portion on the concave cam structure 542A can abut against the recessed portion on the concave cam structure 532A, and the concave cam structure 541A separates from the concave cam structure 531A.

[0101] In some embodiments, through holes may be provided on the concave cam structures at both ends of the tensioning concave cam holder 540, so that the spring 560 can pass through the arc arm 530 and the tensioning concave cam holder 540 and be fixedly connected to the shaft end stop iron 550. For example, Figure 5 As shown, the tensioning concave cam frame 540A has through holes 543A and 544A at both ends. The spring 560A can pass through the arc arm 530A, through holes 543A and 544A, and be connected to the end stop irons 550A-1 and 550A-2 at both ends, respectively.

[0102] In some embodiments, the bottom of both ends of the tensioning cam holder 540 near the shaft back plate 510 may also be provided with two retaining slots, which can be used to engage the retaining spring 570. For example, as shown... Figure 5 As shown, the tensioning concave cam holder 540 may be provided with a slot 545A and a slot 546A. In one example, the slot 545A can be used to engage the first end of the retaining spring 570A, and the second end of the retaining spring 570A may not be engaged in the slot 546A. In another example, the slot 546A can be used to engage the second end of the retaining spring 570A, and the first end of the retaining spring 570A may not be engaged in the slot 545A.

[0103] It should be noted that the middle part of the tensioning concave cam holder 540 can be partially hollowed out, allowing the main body of the arc arm 530 to be accommodated in the middle part of the tensioning concave cam holder 540. In other words, a groove is provided in the middle part of the tensioning concave cam holder 540, which can be used to accommodate the arc arm 530. The arc arm 530 can move in the groove, and when one end of the arc arm 530 contacts one end of the tensioning concave cam holder 540, the other end of the arc arm 530 does not contact the other end of the tensioning concave cam holder 540.

[0104] Shaft end sear 550

[0105] The structure of the shaft end sear 550 can be referenced. Figure 4 and Figure 5 There are two pairs of end caps 550 in total. The torque reversing mechanism 500 may include a pair of end caps 550A and a pair of end caps 550B. For example, the torque reversing mechanism 500A may include a pair of end caps 550A (i.e., end caps 550A-1 and end caps 550A-2), and end caps 550A-1 and end caps 550A-2 are respectively disposed at the two ends of the tensioning concave cam frame 540A away from the arc arm 530A.

[0106] Understandably, the end cap 550 can move along the shaft but does not rotate around it. The two ends of the spring 560A can be fixedly connected to the end cap 550A-1 and the end cap 550A-2 respectively. Therefore, the elastic force of the spring 560A can pull the end cap 550A to move axially.

[0107] In some embodiments, a fixing hole may be provided on the shaft end stop 550, which can be used to fix the spring 560. For example, Figure 5 As shown, the shaft end stop 550A-1 is provided with a fixing hole 551A-1, the shaft end stop 550A-2 is provided with a fixing hole 551A-2, one end of the spring 560A can be connected to the fixing hole 551A-1, and the other end of the spring 560A can be connected to the fixing hole 551A-2.

[0108] In some embodiments, a baffle may be provided on the shaft end stop 550, such as... Figure 5 As shown, a baffle 552A-1 is provided on the side of the shaft end stop 550A-1 facing the shaft back plate 510A, and a baffle 552A-2 is provided on the side of the shaft end stop 550A-2 facing the shaft back plate 510A. Combined with... Figure 4It can be seen that baffles 552A-1 and 552A-2 can be used in conjunction with baffles 582A and 583A on the lever 580, respectively. That is, baffle 582A on the lever 580 can push baffle 552A-1 on the shaft end stop 550A-1 to move axially, or baffle 583A on the lever 580 can push baffle 552A-2 on the shaft end stop 550A-2 to move axially.

[0109] Spring 560

[0110] The structure of spring 560 can be referenced. Figure 3 and Figure 5 Spring 560 may include spring 560A and spring 560B. Both ends of spring 560 are fixedly connected to end caps 550 at both ends.

[0111] For example, such as Figure 5 As shown, spring 560A can pass through arc arm 530A and tension / relaxation concave cam holder 540A and be fixedly connected to shaft end stop 550A. That is, the first end of spring 560A can be fixedly connected to the fixing hole 551A-1 on shaft end stop 550A-1, and the second end of spring 560A can be fixedly connected to the fixing hole 551A-2 on shaft end stop 550A-2. It should be understood that in this embodiment, spring 560 is in a stretched state.

[0112] Snap ring 570

[0113] The structure of the snap ring 570 can be referenced. Figure 3 and Figure 5 The snap ring 570 may include snap ring 570A and snap ring 570B, and the middle part of snap ring 570 may be fixedly connected to the rotating shaft back plate 510, and the two ends of snap ring 570 may be elastically deformed.

[0114] like Figure 5 As shown, in one example, the first end of the retaining ring 570A can be engaged in the slot 545A on the tensioning cam holder 540A, while the second end of the retaining ring 570A may not be engaged in the slot 546A. In another example, the second end of the retaining ring 570A can be engaged in the slot 546A on the tensioning cam holder 540A, while the first end of the retaining ring 570A may not be engaged in the slot 545A.

[0115] Pick 580

[0116] The structure of the 580 paddle can be referenced. Figure 4 and Figure 5The paddle 580 may include paddle 580A and paddle 580B, and a protrusion 581A may be provided on the side of the paddle 580 away from the pivot bracket 520. The protrusion 581A may pass through the through groove 511A on the pivot back plate 510A.

[0117] In some embodiments, as Figure 4 As shown, the paddle 580A is provided with a protrusion 581A, which can pass through the shaft back plate 510A and the main shaft 400, so that the user can move the paddle 580A by moving the protrusion 581A. The paddle 580A can drive the shaft end stop iron 550A to move, which can drive the tensioning concave cam frame 540A to move, thereby changing the direction of the rotational torque.

[0118] In some embodiments, as Figure 4 As shown, baffles 582A and 583A can be provided at both ends of the paddle 580A. Baffles 582A and 583A are positioned facing the rotating shaft bracket 520A. Baffle 582A can be located between the shaft end stop iron 550A-1 and the tension / relaxation concave cam bracket 540A, and baffle 583A can be located between the shaft end stop iron 550A-2 and the tension / relaxation concave cam bracket 540A.

[0119] In one example, when the user moves the protrusion 581A on the paddle 580A, the protrusion 581A can drive the movement of the baffles 582A and 583A, meaning the paddle 580A will move as a whole. Furthermore, since the baffles 582A and 583A are located between the shaft end stop 550A and the tension / relaxation cam holder 540A, the baffles 582A and 583A can drive the shaft end stop 550A to move axially.

[0120] The above combined with the appendix Figure 2 To be continued Figure 5 This application describes the structure of a possible torque commutation mechanism 500 provided in an embodiment. The following will refer to the accompanying drawings. Figure 6 To be continued Figure 8 This article details how the torque reversing mechanism 500 changes the direction of torque during operation.

[0121] It should be noted that in this embodiment, the user can determine whether to switch the torque direction according to their own needs. On the one hand, when the user does not input any external action, the torque reversing mechanism 500 can maintain a fixed torque output. On the other hand, when the user needs to reverse the torque, they can slide the lever 580 for a period of time, and the torque reversing mechanism 500 will move, thereby switching the torque from the first direction to the second direction. The first direction and the second direction are opposite directions. For example, the first direction can be the unfolding direction, and the second direction can be the closing direction.

[0122] like Figure 6 As shown, in the initial state, if the lever 580 is at the lower end, the torque tends to cause the foldable electronic device 10 to close. When the user moves the lever 580 upwards, the torque direction is switched, causing the foldable electronic device to unfold. The entire process is simple, easy to implement, quick, and reliable.

[0123] Figure 7 and Figure 8 The diagram illustrates the positional relationships between the components of the torque commutation mechanism 500 during torque commutation. Among them, Figure 7 (a) and Figure 8 (a) is a cross-sectional view and a three-dimensional structural view of each component of the torque reversing mechanism 500 in the initial position (i.e., before torque switching). Figure 7 (b) and Figure 8 (b) is a cross-sectional view and a three-dimensional structural view of the various components of the torque reversing mechanism 500 when it is in the transition position (i.e., when torque switching is in progress). Figure 7 (c) and Figure 8 (c) is a cross-sectional view and a three-dimensional structural view of each component of the torque reversing mechanism 500 in the end position (i.e., after the torque switching is completed).

[0124] Combination Figure 7 (a) and Figure 8 As shown in (a), in the initial stage, the upper concave cam group is pressed together, and the lower concave cam group is disengaged. That is, the concave cam structure 541A of the tensioning concave cam holder 540A engages with the concave cam structure 531A of the arc arm 530A, and the concave cam structure 542A of the tensioning concave cam holder 540A separates from the concave cam structure 532A of the arc arm 530A. The concave cam structure 541A and the concave cam structure 531A can form the first concave cam group, and the concave cam structure 542A and the concave cam structure 532A can form the second concave cam group. In this case, the concave cam structure 541A will compress the concave cam structure 531A under the action of the spring 560A, thereby generating a torque in the first direction.

[0125] This can be understood as follows: In the first state, the second concave cam structure (i.e., concave cam structure 532A) is separated from the fourth concave cam structure (i.e., concave cam structure 542A), and the first shaft end stop (i.e., shaft end stop 550A-1) presses against the third concave cam structure (i.e., concave cam structure 541A) under the action of the spring 560A. The first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) mesh to provide torque in the first direction. This first direction can be a closed direction.

[0126] For example, such as Figure 7As shown in (a), the first concave cam assembly applies a rightward torque to the arc arm 530A, such as a torque in the closing direction. At this time, the end of the snap ring 570A near the shaft end stop 550A-2 is engaged in the slot 546A on the tensioning concave cam holder 540A, preventing the tensioning concave cam holder 540A from moving axially, i.e., preventing the concave cam structure 541A from separating from the concave cam structure 531A, maintaining the first state. At this time, the end of the snap ring 570A near the shaft end stop 550A-1 is in a free state and can rest on the tensioning concave cam holder 540A.

[0127] In other words, in the first state, the second end of the snap ring 570A can be engaged in the second snap groove 546A to prevent the second concave cam structure (i.e., concave cam structure 532A) and the fourth concave cam structure (i.e., concave cam structure 542A) from getting close to each other, and the first end of the snap ring 570A rests on the tensioning concave cam bracket 540A.

[0128] Combination Figure 7 (b) and Figure 8 As can be seen from (b), during the transition phase, when the user moves the protrusion 581A on the paddle 580A upward (i.e., along the positive x-axis), the paddle 580A will move upward. Alternatively, it can be driven by other external forces (such as a linear motor) to move the paddle 580A upward.

[0129] In this situation, the baffle 582A on the paddle 580A can lift the baffle 552A-1 on the shaft end stop 550A-1, causing the shaft end stop 550A-1 to move away from the arc arm 530A. The baffle 583A on the paddle 580A will then approach the concave cam structure 542A of the tensioning concave cam holder 540A. As a result, the lower inclined surface of the paddle 580A will displace the retaining spring 570A from the retaining groove 5 on the lower side of the tensioning concave cam holder 540A. 46A is ejected from the slot; after the retaining spring 570A is completely ejected from the slot 546A, the tensioning concave cam frame 540A is unrestrained in the axial direction. Thus, under the traction of the spring 560A, the shaft end stop iron 550A-2 moves axially against the tensioning concave cam frame 540A, causing the concave cam structure 542A to approach the concave cam structure 532A, and the concave cam structure 541A to move away from the concave cam structure 531A, which can move upward under the traction of the spring 560A.

[0130] This can be understood as follows: when switching from the first state to the second state, the first baffle (i.e., 582A) on the paddle 580A drives the first shaft end stop (i.e., shaft end stop 550A-1) to move away from the arc arm 530A. After the paddle 580A pushes the second end of the snap ring 570A out of the second slot 546A, the second shaft end stop (i.e., shaft end stop 550A-2) drives the tensioning concave cam frame 540A to move axially under the action of the spring 560A, so that the second concave cam structure (i.e., concave cam structure 532A) and the fourth concave cam structure (i.e., concave cam structure 542A) move closer together, and the first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) move away from each other.

[0131] Combination Figure 7 (c) and Figure 8 As shown in (c), after the torque direction is switched, the lower concave cam group is pressed together, and the upper concave cam group is disengaged. That is, the concave cam structure 542A of the tensioning concave cam holder 540A engages with the concave cam structure 532A of the arc arm 530A, and the concave cam structure 541A of the tensioning concave cam holder 540A separates from the concave cam structure 531A of the arc arm 530A. In this case, the concave cam structure 542A will compress the concave cam structure 532A under the action of the spring 560A, thereby generating a torque in the second direction, which is opposite to the first direction. This second direction can be the unfolding direction.

[0132] It can be understood that in the second state, the first concave cam structure (i.e., concave cam structure 531A) is separated from the third concave cam structure (i.e., concave cam structure 541A), and the second shaft end stop (i.e., shaft end stop 550A-2) presses the fourth concave cam structure (i.e., concave cam structure 542A) under the action of the spring 560A. The second concave cam structure (i.e., concave cam structure 532A) and the fourth concave cam structure (i.e., concave cam structure 542A) mesh to provide torque in the second direction. The first direction and the second direction are opposite directions.

[0133] For example, such as Figure 7 As shown in (c), the second concave cam assembly applies a leftward torque to the arc arm 530A, such as a torque in the unfolding direction. At this time, the end of the snap ring 570A near the shaft end stop 550A-1 is engaged in the slot 545A on the tensioning concave cam holder 540A, preventing the tensioning concave cam holder 540A from moving axially, i.e., preventing the concave cam structure 542A from separating from the concave cam structure 532A, maintaining the second state. It should be understood that at this time, the end of the snap ring 570A near the shaft end stop 550A-2 is in a free state and can rest on the tensioning concave cam holder 540A.

[0134] In other words, in the second state, the first end of the snap ring 570A is engaged in the first slot 545A, preventing the first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) from getting close to each other, and the second end of the snap ring 570A rests on the tensioning concave cam bracket 540A.

[0135] It should be understood that, Figure 7 and Figure 8 In this embodiment, when switching the torque direction, the tensioning concave cam holder 540 can move along the axial direction (i.e., the x-direction), while the arc arm 530 does not move in the axial direction, but can move around a direction perpendicular to the axial direction. That is to say, in the above embodiment, by moving the tensioning concave cam holder 540 along the axis, the alternating engagement of the first concave cam group and the second concave cam group is achieved, thereby achieving the purpose of switching the direction of the closing / unclosing holding force.

[0136] The above combination Figures 2 to 8 The structure of the first torque reversing mechanism 500 provided in this application embodiment and its motion process when changing the torque direction are described below. The structure of the second torque reversing mechanism 500 provided in this application embodiment and its motion process when changing the torque direction are described below.

[0137] In other embodiments, the arc arm 530 can rotate about the axis or slide along the axial direction. In this case, the tension / suspension concave cam holder 540 is fixed relative to the rotating shaft back plate 510. It should be understood that the principle of the arc arm 530 moving along the axis in this embodiment is essentially the same as the principle of the tension / suspension concave cam holder 540 moving along the axis in the above embodiments. The difference is that in the above embodiments, the tension / suspension concave cam holder 540 is driven to move along the axis by the spring 560 pulling the shaft end stop 550, while in this embodiment, the arc arm 530 is driven to move axially by the spring 560 pulling the shaft end stop 550.

[0138] It should be noted that, in this embodiment, the structure of the arc arm 530 and the shaft end stop 550 is the same as described above. Figures 2 to 8 The arc arm 530 and the shaft end stop 550 shown in the figure have roughly the same structure. The following mainly explains the differences.

[0139] In this embodiment, the arc arm 530 can slide along the axial direction and rotate about the axial direction. In this case, the retaining spring 570 can be engaged in the groove of the arc arm 530, thereby preventing the concave cam structure 531A or concave cam structure 532A from moving along the axial direction. That is, the first retaining groove 545A and the second retaining groove 546A on the tensioning concave cam holder 540 can be eliminated, and the first groove and the second groove can be provided on the arc arm 530. The two ends of the retaining spring 570 can be engaged in the first groove or the second groove respectively.

[0140] For example, such as Figure 9 As shown, a first sliding groove 535A and a second sliding groove 536A are provided along the circumferential direction of the arc arm 530A. The first sliding groove 535A and the second sliding groove 536A can be used to engage the first end and the second end of the snap ring 570A, respectively. The first sliding groove 535A can be provided on the main body portion 534A on the side near the concave cam structure 531A, and the second sliding groove 536A can be provided on the main body portion 534A on the side near the concave cam structure 532A.

[0141] The arc arm 530A may be provided with a first shoulder 537A and a second shoulder 538A along the axial direction. That is, the first shoulder 537A can be formed on the side of the main body 534A near the concave cam structure 531A, and the second shoulder 538A can be formed on the side of the main body 534A near the concave cam structure 532A. Specifically, the arc arm 530A includes a main body 534A, a first shoulder 537A and a second shoulder 538A. The first shoulder 537A is provided on the side of the main body 534A near the concave cam structure 531A, and the second shoulder 538A is provided on the side of the main body 534A near the concave cam structure 532A.

[0142] In one example, the shaft end stop 550A-1 may include a first stop (not shown in the figure), which abuts against a first shoulder 537A, thereby causing the arc arm 530A to move axially, so that the concave cam structure 532A engages with the concave cam structure 542A, and the concave cam structure 531A disengages from the concave cam structure 541A. Similarly, the shaft end stop 550A-2 may include a second stop (not shown in the figure), which abuts against a second shoulder 538A, thereby causing the arc arm 530A to move axially, so that the concave cam structure 531A engages with the concave cam structure 541A, and the concave cam structure 532A disengages from the concave cam structure 542A.

[0143] It should be understood that in this example, the shaft end stop 550A-1 can be a hollow structure and can be fitted onto the concave cam structure 541A of the tight concave cam holder 540, and the shaft end stop 550A-2 can also be a hollow structure and can be fitted onto the concave cam structure 542A of the tight concave cam holder 540. Of course, the shaft end stop 550A-1 and shaft end stop 550A-2 can also be other structures, as long as they can enable the stop on the shaft end stop to move against the shoulder on the arc arm.

[0144] The following section will detail the positional relationships between the components of the torque reversing mechanism 500 during the torque reversing process. Specifically, it will explain how torque reversal is achieved when the arc arm 530 moves axially.

[0145] In the initial stage, the concave cam structure 531A of the arc arm 530A engages with the concave cam structure 541A of the tension / relaxation concave cam holder 540A, and the concave cam structure 532A of the loose arc arm 530A separates from the concave cam structure 542A of the tension concave cam holder 540A. The concave cam structures 531A and 541A form the first concave cam group, and the concave cam structures 532A and 542A form the second concave cam group. In this case, the second stop on the shaft end stop 550A-2 will press the second shoulder 538A on the arc arm 530A under the action of the spring 560A, thereby generating a torque in the first direction, such as the torque in the closing direction.

[0146] It can be understood that in the first state, the second concave cam structure (i.e., concave cam structure 532A) is separated from the fourth concave cam structure (i.e., concave cam structure 542A), and the second stop on the second shaft end stop (i.e., shaft end stop 550A-2) presses against the second shoulder 538A on the arc arm 530A under the action of the spring 560A, so that the first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) mesh to provide torque in the first direction.

[0147] At this time, the end of the snap ring 570A near the shaft end stop 550A-2 (i.e., the second end) is engaged in the second groove 536A of the arc arm 530A, thereby preventing the arc arm 530A from moving along the shaft, that is, preventing the concave cam structure 531A from separating from the concave cam structure 541A, and maintaining the first state. The end of the snap ring 570A near the shaft end stop 550A-1 (i.e., the first end) is in a free state and can rest on the arc arm 530A.

[0148] In other words, in the first state, the second end of the snap ring 570A is engaged in the second slide groove 536A, preventing the second concave cam structure (i.e., concave cam structure 532A) and the fourth concave cam structure (i.e., concave cam structure 542A) from getting close to each other, and the first end of the snap ring 570A can rest on the arc arm 530A.

[0149] During the transition phase, for example, when the user moves the protrusion 581A on the paddle 580A along the axial direction (i.e., along the negative x-axis), the paddle 580A will move. Alternatively, the paddle 580A can be moved by other external forces (such as a linear motor).

[0150] In this situation, the baffle 583A on the paddle 580A can push against the baffle 552A-2 on the shaft end stop 550A-2, causing the shaft end stop 550A-2 to move away from the arc arm 530A. The baffle 582A on the paddle 580A separates from the baffle 552A-1 on the shaft end stop 550A-1, and the baffle 552A-1 will move a certain distance with the baffle 582A on the paddle 580A. When the first stop block on the shaft end stop 550A-1 contacts the first shaft shoulder 537A, the shaft end stop 550A-1... Stop moving; as the paddle 580A continues to move, the paddle 580A will push the second end of the retaining spring 570A out of the second slide groove 536A; after the retaining spring 570A is completely pushed out of the second slide groove 536A, the arc arm 530A is unrestrained in the axial direction, so that under the traction of the spring 560A, the first stop block on the shaft end stop iron 550A-1 abuts against the first shaft shoulder 5341A of the arc arm 530A and moves axially, so that the concave cam structure 531A moves away from the concave cam structure 541A and the concave cam structure 532A moves closer to the concave cam structure 542A.

[0151] This can be understood as follows: when switching from the first state to the second state, the second baffle (i.e., baffle 583A) on the paddle 580A drives the second shaft end stop (i.e., baffle 552A-2 on shaft end stop 550A-2) to move away from the arc arm 530A. After the paddle 580A pushes the second end of the snap ring 570A out of the second slide groove 536A, the first stop block on the first shaft end stop (i.e., shaft end stop 550A-1) moves axially against the first shoulder 537A of the arc arm 530A under the action of the spring 560A, so that the second concave cam structure (i.e., concave cam structure 532A) and the fourth concave cam structure (i.e., concave cam structure 542A) move closer together, and the first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) move away from each other.

[0152] After the torque direction is switched, the concave cam structure 532A of the arc arm 530A engages with the concave cam structure 542A of the tension / relaxation concave cam holder 540A, while the concave cam structure 531A of the arc arm 530A separates from the concave cam structure 541A of the tension / relaxation concave cam holder 540A. In this situation, the concave cam structure 532A will compress the concave cam structure 542A under the action of the spring 560A, thereby generating a torque in a second direction, which is opposite to the first direction, such as a torque in the unfolding direction.

[0153] It can be understood that in the second state, the first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) are separated, and the first stop on the first shaft end stop (i.e., shaft end stop 550A-1) presses against the first shoulder 537A on the arc arm 530A under the action of the spring 560A, so that the second concave cam structure (i.e., concave cam structure 532A) and the fourth concave cam structure (i.e., concave cam structure 542A) mesh to provide torque in the second direction, and the first direction and the second direction are opposite directions.

[0154] At this time, the first end of the snap ring 570A can be engaged in the first groove 535A of the arc arm 530A, thereby preventing the arc arm 530A from moving along the axis, that is, preventing the concave cam structure 532A from separating from the concave cam structure 542A, and maintaining the second state. It should be understood that at this time, the first end of the snap ring 570A is in a free state and can rest on the arc arm 530A.

[0155] In other words, in the second state, the first end of the snap ring 570A is engaged in the first slide groove 535A, preventing the first concave cam structure (i.e., concave cam structure 531A) and the third concave cam structure (i.e., concave cam structure 541A) from getting close to each other, and the second end of the snap ring 570A rests on the arc arm 530A.

[0156] The above describes the structure of the torque reversing mechanism 500 provided in this application and its motion process when changing the direction of torque.

[0157] It should be noted that in the above embodiments, when the concave cam structure 531A of the arc arm 530A is engaged with the concave cam structure 541A of the tension-relaxation concave cam holder 540A, the concave cam structure 532A of the arc arm 530A is in a separated state; while when the concave cam structure 532A of the arc arm 530A is engaged with the concave cam structure 542A of the tension-relaxation concave cam holder 540A, the concave cam structure 531A of the arc arm 530A is in a separated state.

[0158] like Figure 10 As shown, Figure 10 The projection cross-sectional views of the arc arm 530A and the tension / strain concave cam holder 540A in different states on the xy plane are shown. Figure 10 (a) shows the projected cross-sectional view of the arc arm 530A and the tension / relaxation concave cam holder 540A in the first state on the xy plane. Figure 10 (b) shows the projected cross-sectional view of the arc arm 530A and the tension / slack cam holder 540A in the xy plane in the second state.

[0159] like Figure 10As shown in (a), when the torque reversing mechanism 500 is in the first state, the concave cam structure 531A engages with the concave cam structure 541A, and the concave cam structure 532A disengages from the concave cam structure 542A. During the rotation of the arc arm 530A around the axis, at the contact point, the force generated by the surfaces tangent to the protrusions of the concave cam structure 531A and the recesses of the concave cam structure 541A can also serve as a force (e.g., a closing force) for the user to rotate the foldable electronic device. Figure 10 As shown in (b), when the torque reversing mechanism 500 is in the second state, the concave cam structure 532A engages with the concave cam structure 542A, and the concave cam structure 531A disengages from the concave cam structure 541A. During the rotation of the arc arm 530A around the axis, at the contact point, the force generated by the surfaces tangent to the protrusions of the concave cam structure 532A and the recesses of the concave cam structure 542A can also serve as a force for the user to rotate the foldable electronic device (e.g., unfolding force), and Figure 10 The force generated in (b) and Figure 10 The forces generated in (a) are in opposite directions. It should be understood that the smaller the angle between the tangent surface and the length extension direction of the main shaft (e.g., the x-direction), the greater the force during the rotation of the arc arm 530A.

[0160] It should be noted that in this application, when the user closes the foldable electronic device (e.g. Figure 10 As shown in (a), a pre-closing force can be provided to assist the user in closing the foldable electronic device; when the user unfolds the foldable electronic device (as shown in (a)), a pre-closing force can be provided to assist the user in closing the foldable electronic device; Figure 10 As shown in (b), a pre-opening force can be provided to assist the user in unfolding the foldable electronic device.

[0161] In summary, in the embodiments provided in this application, on the one hand, the tensioning concave cam holder 540 can be controlled to move axially while the arc arm 530 does not move axially, thereby realizing the alternating engagement of the concave cam group and achieving the purpose of switching the direction of the closing / unfolding holding force (or torque); on the other hand, the arc arm 530 can also be controlled to move axially while the tensioning concave cam holder 540 does not move axially, thereby realizing the alternating engagement of the concave cam group and achieving the purpose of switching the direction of the closing / unfolding holding force (or torque).

[0162] It should be understood that this application addresses the problem that existing hinge or pivot mechanisms can only provide a single closing or unfolding holding force at a certain folding angle. It employs two pairs of concave cam sets with different phase angles, which alternately engage to switch the direction of the closing / unfolding holding force. This allows users to open the first and second housings of the foldable electronic device without experiencing difficulty due to forces (or torques) contrary to their intended operation; instead, it provides assistance in the direction of the intended movement. Furthermore, in this embodiment, a snap ring is used to effectively maintain a specific state; thus, the original state will be maintained unless the user actively triggers a state switch. Additionally, in this embodiment, a single reliable mechanical input such as a lever or push rod can be used, which can also serve as the input interface for electronic controls, systematically solving the state switching control problem.

[0163] It should be noted that the torque reversing mechanism 500 provided in this application embodiment can be used in rotating shafts, hinges, or other axial rotation mechanisms, that is, a scheme that uses a pair of opposite concave cam groups (or inclined spiral grooves, etc.) to achieve torque reversing.

[0164] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A rotating shaft assembly, characterized in that, The system includes a pair of torque reversing mechanisms, each of which comprises: an arc arm, a tension / relaxation concave cam holder, a first shaft end stop, a second shaft end stop, and a spring, wherein: The two ends of the arc arm are respectively provided with a first concave cam structure and a second concave cam structure. The first concave cam structure and the second concave cam structure are arranged along the axial direction and are symmetrically arranged along the direction perpendicular to the axis. The tensioning concave cam frame includes a third concave cam structure, a fourth concave cam structure, and a connecting part connecting the third concave cam structure and the fourth concave cam structure. The connecting part is provided with a groove that can accommodate part of the arc arm. The third concave cam structure and the fourth concave cam structure are arranged axially, and there is a phase difference between the third concave cam structure and the fourth concave cam structure. The arc arm is a hollow structure. The first concave cam structure has a first through hole, the second concave cam structure has a second through hole, the third concave cam structure has a third through hole, and the fourth concave cam structure has a fourth through hole. The spring passes through the arc arm, the first through hole, the second through hole, the third through hole, and the fourth through hole, and the two ends of the spring are fixedly connected to the first shaft end stop iron and the second shaft end stop iron, respectively. The first shaft end stop is disposed on the side of the third concave cam structure away from the first concave cam structure, and the second shaft end stop is disposed on the side of the fourth concave cam structure away from the second concave cam structure. In the first state, the second concave cam structure is separated from the fourth concave cam structure, and the first shaft end stop is pressed against the third concave cam structure under the action of the spring. The first concave cam structure and the third concave cam structure mesh to provide torque in the first direction. In the second state, the first concave cam structure is separated from the third concave cam structure, and the second shaft end stop is pressed against the fourth concave cam structure under the action of the spring. The second concave cam structure and the fourth concave cam structure are engaged to provide torque in a second direction, the first direction being opposite to the second direction.

2. The rotating shaft assembly according to claim 1, characterized in that, The torque reversing mechanism further includes a shaft back plate and a shaft support. A semi-enclosed space is formed between the shaft back plate and the shaft support. The semi-enclosed space is used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring.

3. The rotating shaft assembly according to claim 2, characterized in that, The torque reversing mechanism also includes a retaining ring, the middle of which is fixedly connected to the back plate of the rotating shaft, and both ends of which are capable of elastic deformation. The connecting part of the tensioning concave cam frame is provided with a first slot and a second slot on the side near the back plate of the rotating shaft. The first slot and the second slot are respectively used to engage the first end and the second end of the retaining spring. In the first state, the second end of the retaining spring is engaged in the second slot to prevent the second concave cam structure and the fourth concave cam structure from getting close to each other, and the first end of the retaining spring rests on the tensioning concave cam frame. In the second state, the first end of the retaining spring is engaged in the first slot, preventing the first concave cam structure and the third concave cam structure from getting close to each other, and the second end of the retaining spring rests on the tensioning concave cam frame.

4. The rotating shaft assembly according to claim 3, characterized in that, The torque reversing mechanism further includes a paddle, on which a first baffle and a second baffle are provided. The first baffle is located between the first shaft end stop iron and the third concave cam structure, and the second baffle is located between the second shaft end stop iron and the fourth concave cam structure. When switching from the first state to the second state, the first baffle drives the first shaft end stop iron to move away from the arc arm. After the paddle pushes the second end of the snap ring out of the second slot, the second shaft end stop iron drives the tensioning concave cam frame to move axially under the action of the spring, so that the second concave cam structure is close to the fourth concave cam structure, and the first concave cam structure is far away from the third concave cam structure.

5. The rotating shaft assembly according to claim 4, characterized in that, The paddle is provided with a protrusion that protrudes toward the back plate of the rotating shaft, and a through groove is provided on the back plate of the rotating shaft at a position corresponding to the protrusion, through which the protrusion can pass.

6. The shaft assembly according to any one of claims 1 to 5, characterized in that, The arc arm is provided with a boss, which is fixedly connected to the mid-frame of the foldable electronic device, so that the arc arm can rotate around the axis.

7. The shaft assembly according to any one of claims 1 to 6, characterized in that, The first shaft end stop is provided with a first fixing hole, and the second shaft end stop is provided with a second fixing hole. The first fixing hole is used to fix and connect with the first end of the spring, and the second fixing hole is used to fix and connect with the second end of the spring.

8. A rotating shaft assembly, characterized in that, The system includes a pair of torque reversing mechanisms, each of which comprises: an arc arm, a tension / relaxation concave cam holder, a first shaft end stop, a second shaft end stop, and a spring, wherein: The two ends of the arc arm are respectively provided with a first concave cam structure and a second concave cam structure. The first concave cam structure and the second concave cam structure are arranged along the axial direction and are symmetrically arranged along the direction perpendicular to the axis. The tensioning concave cam frame includes a third concave cam structure, a fourth concave cam structure, and a connecting part connecting the third concave cam structure and the fourth concave cam structure. The connecting part is provided with a groove that can accommodate part of the arc arm. The third concave cam structure and the fourth concave cam structure are arranged axially, and there is a phase difference between the third concave cam structure and the fourth concave cam structure. The arc arm is a hollow structure. The first concave cam structure has a first through hole, the second concave cam structure has a second through hole, the third concave cam structure has a third through hole, and the fourth concave cam structure has a fourth through hole. The spring passes through the arc arm, the first through hole, the second through hole, the third through hole, and the fourth through hole, and the two ends of the spring are fixedly connected to the first shaft end stop iron and the second shaft end stop iron, respectively. The arc arm includes a main body, a first shoulder and a second shoulder. The first shoulder is located on the side of the main body close to the first concave cam structure, and the second shoulder is located on the side of the main body close to the third concave cam structure. The first shaft end stop includes a first stop block, and the second shaft end stop includes a second stop block. The first stop block can abut against the first shaft shoulder, and the second stop block can abut against the second shaft shoulder. In the first state, the second concave cam structure is separated from the fourth concave cam structure, and the second stop on the second shaft end stop iron presses against the second shoulder on the arc arm under the action of the spring, so that the first concave cam structure meshes with the third concave cam structure to provide torque in the first direction; In the second state, the first concave cam structure is separated from the third concave cam structure, and the first stop on the first shaft end stop iron presses against the first shoulder on the arc arm under the action of the spring, so that the second concave cam structure meshes with the fourth concave cam structure to provide torque in a second direction, the first direction being opposite to the second direction.

9. The rotating shaft assembly according to claim 8, characterized in that, The torque reversing mechanism further includes a shaft back plate and a shaft support. A semi-enclosed space is formed between the shaft back plate and the shaft support. The semi-enclosed space is used to accommodate the arc arm, the tensioning concave cam frame, the first shaft end stop, the second shaft end stop, and the spring.

10. The rotating shaft assembly according to claim 9, characterized in that, The torque reversing mechanism also includes a retaining ring, the middle of which is fixedly connected to the back plate of the rotating shaft, and both ends of which are capable of elastic deformation. A first sliding groove and a second sliding groove are provided along the circumferential direction of the arc arm. The first sliding groove is provided on the side of the main body near the first concave cam structure, and the second sliding groove is provided on the side of the main body near the second concave cam structure. The first sliding groove and the second sliding groove are respectively used to engage the first end and the second end of the snap ring. In the first state, the second end of the retaining ring is engaged in the second slide groove to prevent the second concave cam structure and the fourth concave cam structure from getting close to each other, and the first end of the retaining ring rests on the arc arm. In the second state, the first end of the retaining ring is engaged in the first slide groove, preventing the first concave cam structure and the third concave cam structure from getting close to each other, and the second end of the retaining ring rests on the arc arm.

11. The rotating shaft assembly according to claim 10, characterized in that, The torque reversing mechanism further includes a paddle, on which a first baffle and a second baffle are provided. The first baffle is located between the arc arm and the first concave cam structure, and the second baffle is located between the arc arm and the second concave cam structure. When switching from the first state to the second state, the second baffle drives the second shaft end stop iron to move away from the arc arm. After the paddle pushes the second end of the snap ring out of the second slide groove, the first stop block on the first shaft end stop iron moves axially against the first shoulder of the arc arm under the action of the spring, so that the second concave cam structure is close to the fourth concave cam structure, and the first concave cam structure is far away from the third concave cam structure.

12. The rotating shaft assembly according to claim 11, characterized in that, The paddle is provided with a protrusion that protrudes toward the back plate of the rotating shaft, and a through groove is provided on the back plate of the rotating shaft at a position corresponding to the protrusion, through which the protrusion can pass.

13. The shaft assembly according to any one of claims 8 to 12, characterized in that, The arc arm is provided with a boss, which is fixedly connected to the mid-frame of the foldable electronic device, so that the arc arm can rotate around the axis.

14. The shaft assembly according to any one of claims 8 to 13, characterized in that, The first shaft end stop is provided with a first fixing hole, and the second shaft end stop is provided with a second fixing hole. The first fixing hole is used to fix and connect with the first end of the spring, and the second fixing hole is used to fix and connect with the second end of the spring.

15. A foldable electronic device, characterized in that, include: First shell; Second shell; The pivot assembly as claimed in any one of claims 1 to 7, or the pivot assembly as claimed in any one of claims 8 to 14, wherein the pivot assembly is connected between the first housing and the second housing.

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