Rotating shaft mechanism and foldable electronic equipment

Abstract

The utility model provides a rotating shaft mechanism and foldable electronic equipment, and relates to the technical field of electronic equipment accessories. The rotating shaft mechanism comprises a driving part; the connecting piece is in transmission connection with the driving piece; the swing arm is provided with a connecting hole allowing the connecting piece to be inserted therein, and the swing arm is configured to be capable of rotating relative to the connecting piece; the friction piece makes contact with the swing arm in the axial direction of the swing arm, an insertion hole used for allowing the connecting piece to be inserted is formed in the friction piece, and the friction piece is configured to move synchronously with the connecting piece; the locking piece is located on the side, in the axial direction of the connecting piece, of the swing arm, and the locking piece is used for pressing the swing arm and the friction piece. Through the arrangement, the rotating shaft mechanism has the automatic opening and closing function and the manual opening and closing function at the same time, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic device accessories, in particular to a rotating shaft mechanism and a foldable electronic device. BACKGROUND

[0002] Foldable electronic devices such as foldable mobile phones and foldable tablets have been popularized in the market. As a core component of foldable electronic devices, the rotating shaft mechanism plays a key role in the realization of folding function.

[0003] Some foldable electronic devices on the market currently adopt an electric rotating shaft mechanism, that is, the rotating shaft mechanism is driven to rotate by a motor to realize the electric opening and closing of the electronic device. However, this structure usually makes it impossible for users to manually control the opening and closing of the electronic device according to their own needs, affecting the user experience. CONTENT OF THE INVENTION

[0004] In view of this, the present application provides a rotating shaft mechanism and a foldable electronic device. The rotating shaft mechanism has both automatic opening and closing and manual opening and closing functions, improving the user experience.

[0005] Specifically, the technical solutions include the following:

[0006] In a first aspect, the present application provides a rotating shaft mechanism, which comprises:

[0007] a driving member;

[0008] a connecting member in transmission connection with the driving member;

[0009] an oscillating arm provided with a connecting hole for allowing the connecting member to be inserted, the oscillating arm being configured to be able to rotate relative to the connecting member;

[0010] a friction member in contact with the oscillating arm along the axial direction of the oscillating arm, the friction member being provided with an insertion hole for allowing the connecting member to be inserted, the friction member being configured to move synchronously with the connecting member;

[0011] a locking member located on one side of the oscillating arm in the axial direction of the connecting member, the locking member being used to compress the oscillating arm and the friction member.

[0012] In the technical solution provided by the present application, the friction member is in contact with the oscillating arm, and the locking member compresses the oscillating arm and the friction member. In the process of rotating the connecting member by the driving member, the friction member rotates synchronously with the connecting member and drives the oscillating arm to rotate under the action of static friction, realizing the automatic opening and closing function of the rotating shaft mechanism. When an external force acts on the oscillating arm, the oscillating arm can overcome the maximum static friction between the oscillating arm and the friction member under the action of the external force, so as to rotate relative to the connecting member and the driving member, realizing the manual opening and closing function of the rotating shaft mechanism.

[0013] In some possible implementation manners, the swing arm comprises a plurality of sub-arm bodies, the plurality of sub-arm bodies are spaced apart along the axial direction of the connecting member, a friction member is arranged between any two adjacent sub-arm bodies, and each sub-arm body is provided with the connecting hole.

[0014] In the technical scheme provided in the present application, the alternating superposition structure of the plurality of spaced-apart sub-arm bodies and the plurality of friction members greatly increases the contact area between the swing arm and the friction member, and improves the static friction torque between the swing arm and the friction member, thereby ensuring that the swing arm is driven to rotate synchronously by the friction member in the automatic opening and closing mode of the rotating shaft mechanism, and realizing the automatic opening and closing action of the rotating shaft mechanism.

[0015] In some possible implementation manners, the rotating shaft mechanism further comprises a fixed support, and the fixed support is connected with the plurality of sub-arm bodies respectively, so that the plurality of sub-arm bodies move synchronously.

[0016] In the technical scheme provided in the present application, the fixed support is arranged to realize the rigid connection between the plurality of sub-arm bodies, and ensure the synchronous and coordinated movement of the plurality of sub-arm bodies, thereby preventing the plurality of sub-arm bodies from being circumferentially misaligned due to asynchronous movement.

[0017] In some possible implementation manners, the connecting member has a non-circular cross-sectional profile shape, the cross-sectional profile shape of the insertion hole is the same as that of the connecting member, and the cross-sectional profile shape of the connecting hole is different from that of the connecting member.

[0018] In the technical scheme provided in the present application, the shape matching between the connecting member and the insertion hole limits the relative rotation between the connecting member and the friction member, realizes the gapless fit between the connecting member and the friction member, enhances the connection strength and reliability of the shaft-hole connection between the connecting member and the friction member, and prevents the connecting member and the friction member from slipping circumferentially. Moreover, since the cross-sectional profile shape of the connecting hole is different from that of the connecting member, the swing arm can rotate relative to the connecting member during the manual opening and closing of the rotating shaft mechanism, and the normal manual opening and closing action is ensured.

[0019] In some possible implementation manners, the cross-sectional profile shape of the connecting hole is circular, and the outer peripheral wall of the connecting member has an arc surface for contacting the hole wall of the connecting hole.

[0020] In the technical scheme provided in the present application, the contact area of the connecting member and the connecting hole is increased, the surface contact is used instead of the line contact, the friction torque of the swing arm when rotating relative to the connecting member is reduced, the smoothness of the rotating shaft mechanism during manual opening and closing is ensured, and the local stress concentration is effectively avoided through the curvature matching design of the contact surface of the connecting member and the connecting hole.

[0021] In some possible implementation manners, the rotating shaft mechanism further comprises an elastic member, and the elastic member is located on one side of the locking member close to the swing arm.

[0022] In the technical scheme provided in the present application, the elastic member is arranged to provide a stable pre-tightening force for the swing arm and the friction member, and to automatically compensate for the gap between the swing arm and the friction member due to wear, so as to ensure that the swing arm and the friction member have appropriate static friction force, and to ensure that the automatic opening and closing function of the rotating shaft mechanism is normally performed, and to provide certain damping when the rotating shaft mechanism is manually opened and closed, thereby improving the hand feeling of the electronic device.

[0023] In some possible implementation manners, the locking member is threadedly connected with the connecting member, and the locking member can adjust the compression amount of the elastic member.

[0024] In the technical scheme provided in the present application, the locking member is threadedly connected with the connecting member, so that the compression amount of the elastic member can be finely adjusted, and the swing arm and the friction member can be conveniently compressed to form static friction coupling therebetween.

[0025] In some possible implementation manners, the rotating shaft mechanism further comprises a speed reducer, an input end of the speed reducer is connected with the driving member, and an output end of the speed reducer is connected with the connecting member.

[0026] In the technical scheme provided in the present application, the speed reducer is arranged to effectively control the output rotating speed of the rotating shaft mechanism, the speed reducer can convert the high-speed low-torque input of the input end of the rotating shaft mechanism into low-speed high-torque output of the swing arm, so as to achieve the effect of speed reduction and torque increase, and the rotating shaft mechanism can still stably rotate when carrying the first folding main body and the second folding main body, thereby avoiding the phenomenon of jamming or "not unfolding" due to insufficient torque.

[0027] In some possible implementation manners, the speed reducer comprises an input gear, a speed reduction gear set and an output gear which are sequentially engaged, the input gear is connected with the driving member, and the output gear is connected with the connecting member.

[0028] In the technical scheme provided in the present application, the speed reducer is a gear set speed reducer, and power is efficiently transmitted in a compact space through multi-stage gear reduction, which not only helps to reduce the space occupied by the rotating shaft mechanism, but also helps to increase the transmission ratio, so as to accurately control the opening and closing angle of the rotating shaft mechanism.

[0029] In some possible implementation manners, the rotating shaft mechanism further comprises a torque detection member in communication connection with the driving member, and the torque detection member is installed on the output end of the driving member.

[0030] In the technical scheme provided in the application, when the rotating shaft mechanism encounters manual intervention in the process of electric opening and closing, the static friction coupling state between the swing arm and the friction piece is immediately switched to the sliding friction state, the torque detection piece detects the sudden change of the torque and sends a load sudden change signal to the driving piece, the driving piece automatically stops according to the load sudden change signal, the overload damage of the parts is avoided, and the reliability conflict in the automatic opening and closing scene and the manual opening and closing scene is reduced.

[0031] In a second aspect, the application provides a foldable electronic device, which comprises the rotating shaft mechanism provided in any one of the embodiments of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 The structural schematic diagram of the rotating shaft mechanism provided in the embodiments of the application is shown in the figure.

[0034] Figure 2 The structural schematic diagram of the swing arm provided in the embodiments of the application is shown in the figure.

[0035] Figure 3 The sectional view of the swing arm provided in the embodiments of the application is shown in the figure.

[0036] Figure 4 The structural schematic diagram of the bracket body provided in the embodiments of the application is shown in the figure.

[0037] Figure 5 The assembly schematic diagram of the connecting piece and the output gear provided in the embodiments of the application is shown in the figure.

[0038] Figure 6 The structural schematic diagram of the friction plate provided in the embodiments of the application is shown in the figure.

[0039] Figure 7 The cross-sectional view of the rotating shaft mechanism provided in the embodiments of the application is shown in the figure.

[0040] Figure 8 One of the exploded views of the rotating shaft mechanism provided in the embodiments of the application is shown in the figure.

[0041] Figure 9 The second exploded view of the rotating shaft mechanism provided in the embodiments of the application is shown in the figure.

[0042] Figure 10 The schematic diagram of the power transmission path of the rotating shaft mechanism provided in the embodiments of the application in automatic opening and closing and manual opening and closing is shown in the figure.

[0043] The reference signs in the drawings respectively represent:

[0044] 1 - driving member;

[0045] 2 - connecting member;

[0046] 3 - swing arm; 31 - connecting hole; 32 - sub-arm body;

[0047] 4 - friction member; 41 - insertion hole;

[0048] 5 - locking member;

[0049] 6 - motor frame;

[0050] 7 - fixed support; 71 - support body; 711 - pinion part; 7111 - through hole; 72 - fixing pin;

[0051] 8 - elastic member;

[0052] 9 - baffle;

[0053] 10 - speed reducer; 101 - input gear; 102 - speed reduction gear set; 1021 - primary speed reduction gear; 1022 - secondary speed reduction gear; 103 - output gear; 104 - fixing frame;

[0054] 100 - first rotating shaft assembly; 200 - second rotating shaft assembly.

[0055] The specific embodiments of the present application have been shown in the above drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work are within the scope of protection of the present application.

[0057] The positional nouns such as “upper”, “lower”, “lateral” and the like involved in the embodiments of the present application are generally based on the relative relationship of the positions shown in the drawings, and these positional nouns are only used to more clearly describe the structures and the relationship between the structures, and are not intended to describe absolute positions. When the product is placed in different postures, the positions may change, for example, “upper” and “lower” may be interchanged.

[0058] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as those generally understood by one of ordinary skill in the art.

[0059] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0060] As shown in Figure 1 , the embodiments of the present application provide a rotating shaft mechanism, which comprises a driving member 1, a connecting member 2, a swing arm 3, a friction member 4 and a locking member 5.

[0061] The connecting member 2 is in transmission connection with the driving member 1. The driving member 1 can be a motor or other power device. Exemplarily, as shown in Figure 1 , the rotating shaft mechanism further comprises a motor bracket 6, which is used to fix the driving member 1 to prevent the driving member 1 from producing axial and radial displacement.

[0062] As shown in Figure 2 and Figure 3 , the swing arm 3 is provided with a connecting hole 31 for allowing the connecting member 2 to be inserted, and the swing arm 3 is configured to be able to rotate relative to the connecting member 2.

[0063] The friction member 4 is in contact with the swing arm 3 along the axial direction of the swing arm 3, and the friction member 4 is provided with an insertion hole 41 for allowing the connecting member 2 to be inserted, and the friction member 4 is configured to move synchronously with the connecting member 2.

[0064] The locking member 5 is located on one side of the swing arm 3 in the axial direction of the connecting member 2, and the locking member 5 is used to press the swing arm 3 and the friction member 4.

[0065] In some embodiments, the rotating shaft mechanism is applied to a foldable electronic device, which includes but is not limited to a mobile phone, a tablet computer, an e-reader, a wearable device, a notebook computer, an external display, a car central control screen, an automatic telescopic instrument panel, a folding medical device, a rehabilitation auxiliary device, a smart home device, etc.

[0066] Exemplarily, the electronic device comprises a first folding body and a second folding body, and the rotating shaft mechanism is arranged between the first folding body and the second folding body. The first folding body and the second folding body are rotationally connected through the rotating shaft mechanism, so that the first folding body and the second folding body are relatively unfolded or relatively folded.

[0067] In some embodiments, the swing arm 3 is connected with the first folding body or the second folding body, and the rotation of the swing arm 3 can drive the first folding body or the second folding body to rotate, thereby realizing the unfolding or folding action of the electronic device.

[0068] In some embodiments, please refer to Figure 8, the rotating shaft mechanism comprises a first rotating shaft assembly 100 and a second rotating shaft assembly 200 arranged symmetrically, the first rotating shaft assembly 100 and the second rotating shaft assembly 200 each comprise a driving member 1, a connecting member 2, a swing arm 3, a friction member 4 and a locking member 5, the swing arm 3 of the first rotating shaft assembly 100 is connected with a first folding body, and the swing arm 3 of the second rotating shaft assembly 200 is connected with a second folding body, so that the first folding body and the second folding body can rotate under the driving of the swing arm 3.

[0069] The connecting member 2 penetrates the swing arm 3, the friction member 4 and the locking member 5, the locking member 5 can press the swing arm 3 and the friction member 4 in the axial direction of the connecting member 2, so that the swing arm 3 and the friction member 4 have appropriate maximum static friction therebetween, thereby ensuring that the swing arm 3 can be driven by the friction member 4 through the static friction therebetween when the connecting member 2 is rotated under the driving of the driving member 1, and realizing the automatic opening and closing function of the rotating shaft mechanism.

[0070] In the automatic opening and closing process of the rotating shaft mechanism, the connecting member 2, the swing arm 3 and the friction member 4 rotate synchronously; in the manual opening and closing process of the rotating shaft mechanism, the connecting member 2 and the friction member 4 are relatively static, and the swing arm 3 rotates relative to the connecting member 2 and the friction member 4.

[0071] Exemplarily, in the automatic opening and closing process of the rotating shaft mechanism, the power transmission path is that the driving member 1 is started to drive the connecting member 2 connected with the driving member 1 to rotate; since the friction member 4 is configured to rotate synchronously with the connecting member 2, the friction member 4 is driven by the connecting member 2 to rotate; since the friction member 4 and the swing arm 3 are coupled by static friction under the pre-tightening force of the locking member 5, the swing arm 3 is driven by the friction member 4 to rotate under the static friction force, and finally the automatic opening and closing action of the rotating shaft mechanism is realized.

[0072] Exemplarily, in the manual opening and closing process of the rotating shaft mechanism, the power transmission path is that an external force acts on the swing arm 3 to make the swing arm 3 overcome the maximum static friction between the swing arm 3 and the friction member 4, so that the swing arm 3 and the friction member 4 are decoupled and enter a sliding friction state, at this time, the driving member 1, the connecting member 2 and the friction member 4 are relatively static, and the swing arm 3 rotates relative to the friction member 4, the connecting member 2 and the driving member 1, thereby realizing the manual opening and closing action of the rotating shaft mechanism.

[0073] Through the above setting, the passive friction mechanism and the dynamic decoupling transmission structure are used to ensure high-precision transmission of the rotating shaft mechanism in the electric mode and smooth operation of the rotating shaft mechanism in the manual mode, and the structure is simple, which can reduce the number of parts and the space occupied by the rotating shaft mechanism.

[0074] The pivot mechanism provided by the embodiment of the present application is characterized in that the friction member 4 is arranged in contact with the swing arm 3, and the locking member 5 is arranged to press the swing arm 3 and the friction member 4, in the process of driving the connecting member 2 to rotate by the driving member 1, the friction member 4 rotates synchronously with the connecting member 2, and under the action of static friction, the swing arm 3 is driven to rotate, thereby realizing the automatic opening and closing function of the pivot mechanism; when an external force is applied to the swing arm 3, the swing arm 3 can overcome the maximum static friction between the swing arm 3 and the friction member 4 under the action of the external force, thereby rotating relative to the connecting member 2 and the driving member 1, and realizing the manual opening and closing function of the pivot mechanism.

[0075] In some embodiments, the swing arm 3 comprises a plurality of sub-arm bodies 32, the plurality of sub-arm bodies 32 are spaced apart along the axial direction of the connecting member 2, and a friction member 4 is arranged between any two adjacent sub-arm bodies 32, and each sub-arm body 32 has a connecting hole 31.

[0076] As shown in Figure 2 or Figure 3 each swing arm 3 comprises four sub-arm bodies 32, the four sub-arm bodies 32 are spaced apart along the axial direction of the connecting member 2, and three friction members 4 are inserted into the gap between the adjacent two sub-arm bodies 32 one by one.

[0077] In this embodiment, the alternating and superimposed structure of the plurality of spaced-apart sub-arm bodies 32 and the plurality of friction members 4 greatly increases the contact area between the swing arm 3 and the friction member 4, and improves the static friction torque between the swing arm 3 and the friction member 4, thereby ensuring that the swing arm 3 is driven to rotate synchronously by the friction member 4 in the automatic opening and closing mode of the pivot mechanism, and realizing the automatic opening and closing action of the pivot mechanism.

[0078] In some embodiments, the pivot mechanism further comprises a fixed support 7, the fixed support 7 is connected with the plurality of sub-arm bodies 32 respectively, thereby enabling the plurality of sub-arm bodies 32 to move synchronously.

[0079] Exemplarily, as shown in Figure 3 and Figure 4 the fixed support 7 comprises a support body 71 and a fixed pin 72, the support body 71 has a gear insertion portion 711 for being inserted into the gap between the adjacent sub-arm bodies 32, the gear insertion portion 711 is provided with a through hole 7111 for allowing the fixed pin 72 to be inserted, and the fixed pin 72 can be inserted into the plurality of sub-arm bodies 32 and the through hole 7111 in the direction parallel to the axial direction of the connecting member 2, thereby realizing the rigid connection between the plurality of sub-arm bodies 32.

[0080] In this embodiment, the fixed support 7 is arranged to realize the rigid connection between the plurality of sub-arm bodies 32, thereby ensuring the synchronous and coordinated movement of the plurality of sub-arm bodies 32, and preventing the plurality of sub-arm bodies 32 from being circumferentially misaligned due to different movement steps.

[0081] In some embodiments, the cross-sectional profile of the connector 2 is non-circular, the cross-sectional profile of the socket 41 is the same as that of the connector 2, and the cross-sectional profile of the connection hole 31 is different from that of the connector 2.

[0082] It should be noted that the "cross section" mentioned above is the cross section obtained by cutting with a plane perpendicular to the axis of the connector 2.

[0083] For example, the cross-sectional contours of the connector 2 and the socket 41 are non-circular shapes such as D-shape, oval, cam-shaped, triangular, rectangular, and elliptical. Figure 5 , Figure 6 and Figure 7 As shown, the cross-sectional outline of connector 2 and socket 41 is oval.

[0084] In this embodiment, by setting the cross-sectional contours of the connector 2 and the insertion hole 41 to be non-circular, the shape matching between the connector 2 and the insertion hole 41 restricts the relative rotation between the connector 2 and the friction element 4, achieving a clearance-free fit between the connector 2 and the friction element 4. This enhances the connection strength and reliability of the shaft-hole connection between the connector 2 and the friction element 4, preventing slippage along the circumferential direction. Furthermore, since the cross-sectional contour shape of the connecting hole 31 is different from that of the connector 2, it ensures that the swing arm 3 can rotate relative to the connector 2 during the manual opening and closing of the rotating shaft mechanism, ensuring the normal operation of the manual opening and closing action.

[0085] In some embodiments, the cross-sectional profile of the connecting hole 31 is circular, and the outer peripheral wall of the connector 2 has an arc surface for contacting the hole wall of the connecting hole 31.

[0086] For example, such as Figure 3 and Figure 5 As shown, the connector 2 is in the shape of a flat pin, and the cross-sectional outline of the connector 2 is oval. The arc surfaces on both sides of the connector 2 can contact the hole wall of the connecting hole 31.

[0087] This design increases the contact area between the connector 2 and the connecting hole 31, replacing line contact with surface contact. This reduces the frictional resistance torque of the swing arm 3 when rotating relative to the connector 2. It not only ensures the smoothness of manual opening and closing of the rotating shaft mechanism, but also effectively avoids local stress concentration through the curvature matching design of the contact surfaces of the connector 2 and the connecting hole 31.

[0088] In some embodiments, the pivot mechanism further includes an elastic element 8 located on the side of the locking element 5 near the swing arm 3.

[0089] The elastic member 8 is a component with elastic deformation capability, such as a spring or a disc spring, and can elastically deform along the axial direction of the connecting member 2.

[0090] In an example, the rotating shaft mechanism further comprises a baffle 9 located on the side of the swing arm 3 close to the elastic member 8, and the elastic member 8 is located between the baffle 9 and the locking member 5.

[0091] In this embodiment, the elastic member 8 provides a stable pre-tightening force for the swing arm 3 and the friction member 4, and can automatically compensate for the gap between the swing arm 3 and the friction member 4 due to wear, ensuring that the swing arm 3 and the friction member 4 have appropriate static friction, ensuring the normal operation of the automatic opening and closing function of the rotating shaft mechanism, and also providing certain damping when the rotating shaft mechanism is manually opened and closed, improving the feel of the electronic device.

[0092] In some embodiments, the locking member 5 is threadedly connected to the connecting member 2, and the locking member 5 can adjust the compression amount of the elastic member 8.

[0093] In an example, the locking member 5 is a nut, and the surface of the connecting member 2 for cooperating with the locking member 5 is provided with a threaded structure, and the locking member 5 can cooperate with the threaded structure and be screwed along the axial direction of the connecting member 2, thereby adjusting the compression amount of the elastic member 8, pressing the swing arm 3 and the friction member 4, and forming static friction coupling between the swing arm 3 and the friction member 4.

[0094] In this embodiment, by threadedly connecting the locking member 5 to the connecting member 2, the compression amount of the elastic member 8 can be more finely adjusted, and the swing arm 3 and the friction member 4 can be easily pressed to form static friction coupling between the swing arm 3 and the friction member 4.

[0095] In some embodiments, the rotating shaft mechanism further comprises a speed reducer 10, the input end of the speed reducer 10 is connected to the driving member 1, and the output end of the speed reducer 10 is connected to the connecting member 2.

[0096] In an example, the speed reducer 10 can be a planetary gear reducer, a gear set reducer, a worm gear reducer, etc.

[0097] In related technologies, due to the power density bottleneck of micro-motors and the efficiency decay of transmission systems, the market's foldable electronic devices and rotating shaft mechanisms generally have the "not flat" phenomenon caused by insufficient torque during unfolding, which affects the display effect of the electronic device and the user's experience.

[0098] In this embodiment, by setting the speed reducer 10, the output speed of the rotating shaft mechanism is effectively controlled, the speed reducer 10 can convert the high-speed low-torque input of the input end of the rotating shaft mechanism into the low-speed high-torque output of the swing arm 3, plays a role of speed reduction and torque increase, so that the rotating shaft mechanism can still rotate smoothly when carrying the first folding main body and the second folding main body, avoiding the phenomenon of "not unfolding" caused by insufficient torque.

[0099] In some embodiments, as shown in Figure 8 and Figure 9 , the speed reducer 10 includes an input gear 101, a speed reduction gear set 102 and an output gear 103 engaged in sequence, the input gear 101 is connected with the driving part 1, and the output gear 103 is connected with the connecting part 2.

[0100] In this embodiment, the speed reducer 10 is a gear set speed reducer 10, which realizes efficient power transmission in a compact space through multi-stage gear reduction, which not only helps to reduce the space occupied by the rotating shaft mechanism, but also helps to increase the transmission ratio, and realize accurate control of the opening and closing angle of the rotating shaft mechanism.

[0101] As shown in Figure 8 and Figure 9 , the speed reduction gear set 102 includes a first-stage speed reduction gear 1021 and a second-stage speed reduction gear 1022 connected coaxially, the input gear 101 is engaged with the first-stage speed reduction gear 1021, and the output gear 103 is engaged with the second-stage speed reduction gear 1022.

[0102] Exemplarily, as shown in Figure 10 , the power transmission path of the rotating shaft mechanism in the automatic opening and closing process is: the driving part 1 is started to drive the input gear 101 to rotate, the input gear 101 drives the first-stage speed reduction gear 1021 engaged with itself to rotate, the second-stage speed reduction gear 1022 rotates with the first-stage speed reduction gear 1021 connected coaxially with itself, and then drives the output gear 103 to rotate; the output gear 103 is rigidly connected with the connecting part 2 by welding or the like, and drives the connecting part 2 to rotate; since the friction part 4 and the swing arm 3 form static friction coupling under the pre-tightening force of the locking part 5, the swing arm 3 is driven by the friction part 4 to rotate under the action of static friction, and finally realizes the automatic opening and closing action of the rotating shaft mechanism.

[0103] Among them, the speed reducer 10 further includes a fixing frame 104, the fixing frame 104 is used to provide mounting positions and supports for the input gear 101, the speed reduction gear set 102 and the output gear 103 of the speed reducer 10, to prevent radial displacement of each gear.

[0104] The fixing frame 104 can be one or more, for example Figure 8 or Figure 9As shown, the fixing frame 104 is three, two of which are located between the output gear 103 and the motor, and one is located between the output gear 103 and the swing arm 3.

[0105] The transmission ratio of the speed reducer 10 can be set according to actual needs, for example, in some embodiments, the transmission ratio of the speed reducer 10 is 624, that is, the ratio of the rotation speed of the input gear 101 to the rotation speed of the output gear 103 is 624, which realizes the effect of speed reduction and torque increase.

[0106] In some embodiments, the rotating shaft mechanism further comprises a torque detection member in communication connection with the driving member 1, and the torque detection member is installed at the output end of the driving member 1.

[0107] Illustratively, the torque detection member is a torque sensor, and the torque detection member can send a signal to the driving member 1 to make the driving member 1 change its motion state according to the signal.

[0108] When the rotating shaft mechanism encounters manual intervention during the process of electric opening and closing, the swing arm 3 and the friction member 4 are immediately switched from the static friction coupling state to the sliding friction state, the torque detection member detects the sudden change of torque and sends a load sudden change signal to the driving member 1, so that the driving member 1 automatically stops according to the load sudden change signal, avoiding overloading and damage of parts, and reducing the reliability conflict in the automatic opening and closing scene and the manual opening and closing scene.

[0109] The embodiments of the present application also provide a foldable electronic device comprising the rotating shaft mechanism provided by any of the above embodiments.

[0110] The foldable electronic device includes but is not limited to mobile phones, tablet computers, e-readers, wearable devices, notebook computers, external displays, car central screens, automatic retractable instrument panels, folding medical devices, rehabilitation auxiliary devices, smart home devices, etc.

[0111] Illustratively, the electronic device comprises a first folding body and a second folding body, and the rotating shaft mechanism is arranged between the first folding body and the second folding body, and the first folding body and the second folding body are rotationally connected through the rotating shaft mechanism, so as to realize relative unfolding or relative folding of the first folding body and the second folding body.

[0112] In the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" means two or more, unless otherwise explicitly limited.

[0113] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope of the application being indicated by the following claims.

[0114] It is to be understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various changes can be made to the application without departing from the scope thereof. The scope of the application is limited only by the claims appended hereto.

Claims

1. A rotating shaft mechanism, characterized in that, The rotating shaft mechanism includes: Drive component (1); The connector (2) is connected to the drive component (1) in a transmission manner; The swing arm (3) has a connection hole (31) for allowing the connector (2) to be inserted, and the swing arm (3) is configured to rotate relative to the connector (2); Friction member (4) contacts the swing arm (3) along the axial direction of the swing arm (3), the friction member (4) has a socket (41) for allowing the connector (2) to be inserted, and the friction member (4) is configured to move synchronously with the connector (2); A locking element (5) is located on one side of the swing arm (3) in the axial direction of the connecting member (2), and the locking element (5) is used to press the swing arm (3) and the friction member (4).

2. The rotating shaft mechanism according to claim 1, characterized in that, The swing arm (3) includes multiple sub-arm bodies (32), which are distributed at intervals along the axial direction of the connector (2). A friction element (4) is provided between any two adjacent sub-arm bodies (32), and each sub-arm body (32) has the connecting hole (31).

3. The rotating shaft mechanism according to claim 2, characterized in that, The rotating shaft mechanism also includes a fixed bracket (7), which is connected to a plurality of the sub-arm bodies (32) respectively, so that the plurality of sub-arm bodies (32) move synchronously.

4. The rotating shaft mechanism according to any one of claims 1 to 3, characterized in that, The cross-sectional profile of the connector (2) is not circular. The cross-sectional profile of the insertion hole (41) is the same as that of the connector (2). The cross-sectional profile of the connection hole (31) is different from that of the connector (2).

5. The rotating shaft mechanism according to claim 4, characterized in that, The cross-sectional profile of the connecting hole (31) is circular, and the outer peripheral wall of the connector (2) has an arc surface for contacting the hole wall of the connecting hole (31).

6. The rotating shaft mechanism according to claim 1, characterized in that, The rotating shaft mechanism also includes an elastic element (8), which is located on the side of the locking element (5) near the swing arm (3).

7. The rotating shaft mechanism according to claim 6, characterized in that, The locking member (5) is threadedly connected to the connecting member (2), and the locking member (5) can adjust the compression amount of the elastic member (8).

8. The rotating shaft mechanism according to claim 1, characterized in that, The rotating shaft mechanism also includes a reducer (10), the input end of which is connected to the drive member (1), and the output end of which is connected to the connector (2).

9. The rotating shaft mechanism according to claim 8, characterized in that, The reducer (10) includes an input gear (101), a reduction gear set (102), and an output gear (103) that mesh sequentially. The input gear (101) is connected to the drive member (1), and the output gear (103) is connected to the connector (2).

10. The rotating shaft mechanism according to claim 1, characterized in that, The rotating shaft mechanism also includes a torque detection element that is communicatively connected to the drive element (1), and the torque detection element is installed at the output end of the drive element (1).

11. A foldable electronic device, characterized in that, The electronic device includes the rotating shaft mechanism as described in any one of claims 1 to 10.

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