A rotating shaft mechanism and electronic device

Abstract

The application discloses a rotating shaft mechanism and electronic equipment, to improve the structural strength of the rotating shaft mechanism and prolong the service life of the rotating shaft mechanism. The rotating shaft mechanism comprises a base, a rotating assembly and a damping assembly. The rotating assembly comprises a first rotating arm and a second rotating arm. The first rotating arm and the second rotating arm are respectively rotatably connected to the two sides of the base. The side of the first rotating arm close to the base is provided with a first cam surface. The side of the second rotating arm close to the base is provided with a second cam surface. The damping assembly comprises a transmission member, a first fixing part and an elastic member. The transmission member is slidably arranged on the base along a first direction. The transmission member is located between the first rotating arm and the second rotating arm. The two sides of the transmission member are respectively in abutment with the first cam surface and the second cam surface. The transmission member can slide along the first direction when the first rotating arm and the second rotating arm rotate. The first fixing part is fixed to the base. The first fixing part and the transmission member are arranged in the first direction. The elastic member is limited between the transmission member and the first fixing part.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a rotating shaft mechanism and electronic equipment. Background Technology

[0002] With the gradual maturation of flexible display technology, the way electronic devices display technology has undergone tremendous changes. Foldable flexible screen mobile phones, foldable flexible screen tablets, and wearable electronic devices with foldable flexible screens are a major direction for the evolution of future smart electronic devices.

[0003] As a crucial component for enabling the folding function of foldable electronic devices, the hinge mechanism not only facilitates changes in the folded state of the device but also provides sufficient damping force to ensure reliable support during the transition between folded states. However, as electronic devices continue to evolve towards thinner and lighter designs, the dimensions of the hinge mechanism must also be reduced accordingly to match the slimmer design. This leads to increased contact stress in the structural components providing damping force within the hinge mechanism, which in turn affects the structural strength and lifespan of the hinge mechanism. Summary of the Invention

[0004] This application provides a rotating shaft mechanism and an electronic device to improve the structural strength of the rotating shaft mechanism and extend its service life.

[0005] In a first aspect, this application provides a rotating shaft mechanism, which may include a base, a rotating assembly, and a damping assembly. The rotating shaft assembly may include a first rotating arm and a second rotating arm, which are rotatably connected to opposite sides of the base. The first rotating arm has a first cam surface on its side near the base, and the second rotating arm has a second cam surface on its side near the base. The damping assembly may include a transmission member, a first fixing portion, and an elastic member. The extension direction of the rotation axes of the first and second rotating arms is defined as a first direction. The transmission member is slidably disposed on the base along the first direction and may be located between the first and second rotating arms. Both sides of the transmission member abut against the first and second cam surfaces, respectively, and it may slide along the first direction when the first and second rotating arms rotate. The first fixing arm is fixed to the base, and the first fixing portion and the transmission member are spaced apart along the first direction. The elastic member is elastically positioned between the transmission member and the first fixing portion.

[0006] In the above scheme, the transmission component can convert the elastic force generated by the elastic element in the axial direction (first direction) of the rotating shaft mechanism into a radial force and transmit it to the first and second rotating arms. Since the elastic element is arranged along the axial direction of the rotating shaft mechanism, its size is not limited by other components of the electronic device. Therefore, the size of the elastic element can be appropriately increased to provide sufficient damping force for the electronic device, thereby avoiding the limitation of the opening and closing force of the electronic device. In addition, since the axial space of the rotating shaft structure is relatively spacious, the axial dimension of the transmission component can be appropriately increased to increase its contact area with the first and second rotating arms, thereby reducing contact stress and improving the structural strength of the rotating shaft mechanism and extending its service life.

[0007] In some possible implementations, the transmission component may include a first cam and a second cam. The first cam is located near the first rotating arm and has a third cam surface abutting against the first cam surface on one side, and a first inclined surface on the other side. The second cam is located near the second rotating arm and has a fourth cam surface abutting against the second cam surface on one side, and a second inclined surface on the other side. The first and second inclined surfaces are connected in a transmission manner. When the first and second cams slide towards or away from each other as the first and second rotating arms rotate, at least one of the first and second cams can be pushed to slide along a first direction. This changes the extension and contraction state of the elastic element located between the transmission component and the first fixed part. While the elastic element deforms, it also applies a certain elastic force to the transmission component. This elastic force can be further transmitted by the first and second cams to the first and second rotating arms on both sides and converted into a damping force for the rotation of the first and second rotating arms relative to the base, thereby enabling the first and second rotating arms to rotate stably under the action of the damping force.

[0008] In some possible implementations, the damping assembly may further include a second fixing portion fixed to the base, and the second fixing portion abutting against the side of the transmission member opposite to the first fixing portion, thereby positioning the transmission member on that side.

[0009] In some possible implementations, the damping assembly may further include a sliding portion that is slidably disposed on the base along a first direction and can abut against the side of the transmission member facing the first fixed portion. In this case, one end of the transmission member can abut against the first fixed portion, and the other end can abut against the sliding portion. When the first and second rotating arms on both sides of the transmission member slide along the first direction under the pushing action, the sliding portion can be driven to slide synchronously, thereby compressing the elastic member by the sliding portion.

[0010] In some possible implementations, the first inclined surface may be located at one end of the first cam near the second fixed portion, and the second inclined surface may be located at one end of the second cam near the second fixed portion. The second fixed portion may have a first protrusion on the side facing the transmission member, the first protrusion having a third inclined surface on the side facing the first cam and a fourth inclined surface on the side facing the second cam, wherein the third inclined surface is parallel to and abuts against the first inclined surface, and the fourth inclined surface is parallel to and abuts against the second inclined surface. Thus, the third inclined surface and the first inclined surface, and the fourth inclined surface and the second inclined surface, can each form an inclined surface transmission pair. Based on these two rotational pairs, both the first cam and the second cam can generate sliding motion along the first direction, thus allowing them to jointly compress the elastic element.

[0011] In some possible implementations, the side of the first cam facing the second cam may have a first groove, and the side of the second cam facing the first cam may have a first protrusion. The first protrusion may be at least partially inserted into the first groove, thereby guiding the sliding of the first cam and the second cam towards or away from each other, and also enabling the sliding of the first cam and the second cam in the first direction to be linked, thereby improving the consistency of the movement of the first cam and the second cam in the first direction.

[0012] Similarly, a second protrusion may be provided on the side of the first cam facing the second cam, and a second groove may be provided on the side of the second cam facing the first cam. The second protrusion may be at least partially inserted into the second groove. The engagement of the second protrusion with the second cam can guide the sliding of the first cam and the second cam towards or away from each other, and provide a guarantee for the synchronous sliding of the first cam and the second cam in the first direction.

[0013] In some possible implementations, the end of the first cam near the sliding part may also have a fifth inclined surface, and the end of the second cam near the sliding part may also have a sixth inclined surface. The sliding part has a second protrusion on the side facing the transmission member, the second protrusion may have a seventh inclined surface on the side facing the first cam, and an eighth inclined surface on the side facing the second cam. The seventh inclined surface is parallel to and abuts against the fifth inclined surface, and the eighth inclined surface is parallel to and abuts against the sixth inclined surface. Thus, the seventh and fifth inclined surfaces, and the eighth and sixth inclined surfaces, can each form an inclined surface transmission pair. Based on these two rotational pairs, the forces applied to the sliding part along the first direction by the first and second cams can be superimposed, and both can jointly push the sliding part to slide along the first direction, thereby effectively improving the motion reliability of the damping assembly.

[0014] In some other possible implementations, the side of the sliding part facing the transmission member can also be a plane, which simplifies the structure of the sliding part and thus helps to reduce the overall structural complexity of the damping assembly. In this scheme, a planar contact perpendicular to the first direction can be formed between the transmission member and the sliding part, so that when the transmission member slides, it can directly drive the sliding part to slide along the first direction.

[0015] In some possible implementations, the end of the first cam facing the second fixed part can abut against the second fixed part, and the end of the second cam facing the first fixed part can abut against the sliding part. The first inclined surface and the second inclined surface are parallel and abut against each other, thereby forming an inclined surface transmission pair. This solution realizes the damping function of the first and second rotating arms during rotation through the transmission pair formed by the first and second inclined surfaces. The structure of the rotating shaft mechanism is relatively simple and the cost is relatively low.

[0016] In some possible implementations, the first inclined plane and the second inclined plane are arranged parallel to each other. The first inclined plane may be provided with a first rack, and the second inclined plane may be provided with a second rack. In this case, the transmission component may also include an intermediate gear, which may be disposed between the first and second inclined planes and mesh with the first and second racks respectively. When the first cam and the second cam slide towards or away from each other, the two sides of the intermediate gear roll on the first and second racks respectively, thus ensuring the synchronicity of the sliding of the first and second cams towards or away from each other, thereby helping to improve the working reliability of the damping component.

[0017] In some possible implementations, the damping assembly may further include a guide rod fixed to the base and arranged along a first direction. The transmission component may be sleeved on the guide rod, thereby guiding the sliding of the transmission component using the guide rod and improving the sliding stability of the transmission component in the first direction.

[0018] In some possible implementations, the elastic element can be a spring. In this case, the damping assembly may also include a first pin disposed along a first direction, and the spring can be sleeved on the first pin to avoid problems such as arching when it undergoes elastic deformation.

[0019] In some other possible implementations, the elastic element may also be a spring sheet, and there may be multiple spring sheets, which may be stacked between the first fixed part and the sliding part along the first direction.

[0020] Of course, the elastic element can also be a combination of springs and sheet springs. For example, there can be two springs, which can be arranged on both sides of multiple sheet springs to ensure the uniformity of force on the sliding part, thereby helping to transmit a balanced damping force to the first and second rotating arms.

[0021] Secondly, this application also provides an electronic device that may include a first housing, a second housing, a flexible display screen, and a pivot mechanism as described in any of the possible solutions in the first aspect. The first and second housings may be disposed on opposite sides of the pivot mechanism, with a first rotating arm slidably connected to the first housing and a second rotating arm slidably connected to the second housing. The flexible display screen may continuously cover the first housing, the second housing, and the pivot mechanism, and the flexible display screen is fixedly connected to the first and second housings. The pivot mechanism of this electronic device can provide stable support during the folding or unfolding of the electronic device, thereby improving the reliability of the electronic device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0023] Figure 2 for Figure 1 A schematic diagram of the electronic device shown in its deployed state;

[0024] Figure 3 for Figure 2 An exploded schematic diagram of the electronic device shown;

[0025] Figure 4 for Figure 3 An exploded view of the rotating shaft mechanism 1 shown in the figure;

[0026] Figure 5 A partial structural schematic diagram of a rotating shaft mechanism provided for a possible embodiment of this application;

[0027] Figure 6 for Figure 5 An exploded view of a portion of the rotating shaft mechanism shown.

[0028] Figure 7 A schematic diagram of the structure of a first swing arm provided for a possible embodiment of this application;

[0029] Figure 8 This is a partial structural diagram of the rotating shaft mechanism;

[0030] Figure 9 A schematic diagram of the structure of a first housing fixing frame provided for a possible embodiment of this application;

[0031] Figure 10a A schematic diagram of the rotating shaft mechanism in its deployed state is shown.

[0032] Figure 10b A schematic diagram of a first cross-section provided by a possible embodiment is shown;

[0033] Figure 10cThis is a schematic diagram of the rotating shaft mechanism in its intermediate state.

[0034] Figure 10d This is a schematic diagram of the rotating shaft mechanism when it is in the closed state.

[0035] Figure 11 A schematic diagram of the mechanism by which the first rotating arm and the first swing arm slide relative to the first housing fixing frame, according to an embodiment of this application;

[0036] Figure 12 A schematic diagram of the structure of a first support plate provided in a possible embodiment of this application;

[0037] Figure 13 A schematic diagram of a structure in which a first support plate and a second support plate support a flexible display screen, as provided in a possible embodiment of this application;

[0038] Figure 14 This is a partial structural diagram of a rotating shaft mechanism in an unfolded state, provided in an embodiment of this application.

[0039] Figure 15 This is a partial structural diagram of a rotating shaft mechanism in a folded state, provided in an embodiment of this application.

[0040] Figure 16 for Figure 14 An exploded view of the rotating shaft mechanism shown in the figure;

[0041] Figure 17 for Figure 14 A schematic diagram of the cross-sectional structure of the rotating shaft mechanism shown at point AA;

[0042] Figure 18 for Figure 14 A schematic diagram of the transmission component shown in the figure;

[0043] Figure 19 This is a schematic diagram of the structure of the second fixing part and the sliding part provided in the embodiments of this application;

[0044] Figure 20 for Figure 14 A schematic diagram of the cross-sectional structure of the rotating shaft mechanism at BB shown;

[0045] Figure 21 A partial structural diagram of another rotating shaft mechanism provided in the embodiment of this application when it is in the unfolded state;

[0046] Figure 22 A partial structural diagram of another rotating shaft mechanism provided in the embodiment of this application when it is in the unfolded state;

[0047] Figure 23A partial structural diagram of another rotating shaft mechanism provided in the embodiment of this application when it is in the unfolded state;

[0048] Figure 24 A partial structural diagram of another rotating shaft mechanism provided in the embodiment of this application when it is in the unfolded state;

[0049] Figure 25 A partial structural diagram of another rotating shaft mechanism provided in the embodiment of this application when it is in the unfolded state;

[0050] Figure 26 This is a partial structural diagram of another rotating shaft mechanism provided in the embodiments of this application when it is in the unfolded state.

[0051] Figure label:

[0052] 1-Rotating shaft mechanism; 11-Main shaft module; 11a-First rotating assembly; 11b-Second rotating assembly; 112-First rotating arm;

[0053] 1121 - First slider; 1122 - First protrusion; 11221 - First cam surface;

[0054] 113-First swing arm; 1131-First arc-shaped rotating block; 1132-Second slider;

[0055] 114 - Cover plate; 1141 - First arc-shaped protrusion; 1142 - Second arc-shaped protrusion;

[0056] 115 - First housing fixing bracket; 115a - First surface; 115b - Second surface; 1151 - First slide groove; 11511 - First slide rail;

[0057] 1152 - Second slide groove; 11521 - Second slide rail; 1153 - First rotating groove;

[0058] 16-Base; 163-First arc-shaped groove; 164-Second arc-shaped groove;

[0059] 17-Damping assembly; 171-Transmission component; 1711-First cam; 17111-Third cam surface; 17112-First inclined surface;

[0060] 171121 - First rack; 17113 - Fifth inclined surface; 17114 - First groove; 17115 - Second protrusion; 1712 - Second cam;

[0061] 17121 - Fourth cam surface; 17122 - Second inclined surface; 171221 - Second rack; 17123 - Sixth inclined surface;

[0062] 17124 - First protrusion; 17125 - Second groove; 17126 - First extension; 17127 - Second extension;

[0063] 172-First fixing part; 1721-First locking block; 17211-Locking slot;

[0064] 173-Elastic element; 1731-Spring; 1732-Peel piece; 174-Second fixing part; 1741-First protrusion; 17411-Third inclined surface;

[0065] 17412 - Fourth inclined surface; 1742 - Second locking block; 17421 - Locking hole; 175 - Sliding part; 1751 - Second protrusion;

[0066] 17511 - Seventh inclined plane; 17512 - Eighth inclined plane; 176 - Guide rod; 177 - First pin; 178 - Second pin;

[0067] 179 - Intermediate gear;

[0068] 18-Synchronization component; 181-First driving gear; 182-Second driving gear; 183-Driven gear; 1831-Gear shaft;

[0069] 119 - Second housing fixing frame; 119a - Third surface; 119b - Fourth surface; 1191 - Third slide groove; 11911 - Third slide rail;

[0070] 1192 - Fourth slide groove; 11921 - Fourth slide rail; 1193 - Second rotating groove;

[0071] 120 - Second rotating arm; 12001 - Third slider; 12002 - Second protrusion; 120021 - Second cam surface;

[0072] 121-Second swing arm; 12101-Second arc-shaped rotating block; 12102-Fourth slider;

[0073] 12-First support plate; 12a-First plate surface; 1201-First rotating part;

[0074] 13-Second support plate; 1301-Second rotating part;

[0075] 2-First housing; 2a-First outer surface; 2b-First support surface;

[0076] 3-Second housing; 3a-Second outer surface; 3b-Second support surface;

[0077] 4- Flexible display screen. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0079] refer to Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device can be a mobile phone, a personal digital assistant (PDA), a laptop computer, a tablet computer, or other devices with foldable functionality. Figure 1 The illustrated embodiment uses a mobile phone as an example. The electronic device may include a hinge mechanism, a flexible display screen, and two housings. For ease of description, the two housings can be named the first housing 2 and the second housing 3, respectively. The first housing 2 and the second housing 3 are located on either side of the hinge mechanism 1 and can rotate around it. During use, the electronic device can be closed and unfolded according to different usage scenarios. The electronic device provided in this application can be an inward-folding electronic device. Figure 1 In the illustrated embodiment, the electronic device is in a closed state, and Figure 1 The diagram illustrates the relative positional relationship between the hinge mechanism 1 and the two housings when the electronic device is in a closed state. In this state, the surface of the hinge mechanism 1, the first outer surface 2a of the first housing 2, and the second outer surface 3a of the second housing 3 can collectively serve as the outer surface of the electronic device. Specifically, the first outer surface 2a of the first housing 2 refers to the surface of the first housing 2 that faces away from the flexible display screen, and the second outer surface 3a of the second housing 3 refers to the surface of the second housing 3 that faces away from the flexible display screen 4.

[0080] Please refer to the above. Figure 2 As shown, Figure 2 for Figure 1 The diagram shows the structure of the electronic device in its deployed state. It is worth noting that... Figure 2 The diagram illustrates the structure of the first support surface 2b of the first housing 2 and the second support surface 3b of the second housing 3. The first support surface 2b of the first housing 2 refers to the surface of the first housing 2 used to support the flexible display screen 4, and the second support surface 3b of the second housing 3 refers to the surface of the second housing 3 used to support the flexible display screen 4. The flexible display screen 4 can continuously cover the first support surface 2b of the first housing 2, the second support surface 3b of the second housing 3, and the rotating shaft mechanism 1, and the flexible display screen 4 can be fixedly connected to the first support surface 2b of the first housing 2 and the second support surface 3b of the second housing 3, and the connection method can be, but is not limited to, adhesive bonding. Thus, when the electronic device is in a position such as… Figure 2 When in the unfolded state shown, the first housing 2 and the second housing 3 can support the flexible display screen 4.

[0081] The first housing 2 and the second housing 3 are composed of Figure 2 The unfolded state shown Figure 1 The closed state shown, or by Figure 1 The closed state shown Figure 2 During the relative rotation of the unfolded state shown, the flexible display screen 4 can be bent or flattened along with the first housing 2 and the second housing 3.

[0082] refer to Figure 3 As shown, Figure 3 for Figure 2 The diagram shows an exploded view of the electronic device. It should be noted that... Figure 3 The flexible display screen is not shown. In this embodiment, the first housing 2 and the second housing 3 may be located on opposite sides of the rotating shaft mechanism 1. The rotating shaft mechanism 1 may include one main shaft module 11 or multiple main shaft modules 11. For example, see... Figure 4 , Figure 4 for Figure 3 The exploded view of the rotating shaft mechanism 1 shown is illustrated. Figure 4 In the illustrated embodiment, the rotating shaft mechanism 1 includes three main shaft modules 11, which are spaced apart along the length of the rotating shaft mechanism 1. The length of the rotating shaft mechanism 1 can be understood as the extension direction of the axis of rotation of the first housing 2 and the second housing 3 about the rotating shaft mechanism 1. The first housing 2 and the second housing 3 can be rotatably connected by the plurality of main shaft modules 11, thus effectively improving the stability of the rotation of the first housing 2 and the second housing 3 of the electronic device relative to the rotating shaft mechanism 1.

[0083] Please refer to the above. Figure 5 and Figure 6 As shown, Figure 5 This is a partial structural diagram of a rotating shaft mechanism provided for a possible embodiment of this application. Figure 6 for Figure 5The diagram shows a partial exploded view of the rotating shaft mechanism. In this embodiment, the spindle module 11 may include two rotating components, namely a first rotating component 11a and a second rotating component 11b. The rotating shaft mechanism 1 may also include a base 16, which serves as a support for the first rotating component 11a and the second rotating component 11b. The first rotating component 11a and the second rotating component 11b are respectively disposed on both sides of the base 16. In some embodiments, the first rotating component 11a and the second rotating component 11b may be symmetrically arranged relative to the base 16. For ease of description, in the following embodiments of this application, the spindle module 11 is mainly described using the specific arrangement of the first rotating component 11a and the connection relationship between the first rotating component 11a and the base 16 as examples, while the second rotating component 11b side can be set with reference to the first rotating component 11a side. It should be noted that the design of the second rotating component 11b can be completely consistent with that of the first rotating component 11a; or it can refer only to the components and connection relationships included in the first rotating component 11a, and other parameters can be adjusted adaptively, without requiring complete consistency.

[0084] It is worth mentioning that, in one possible embodiment of this application, when there are multiple spindle modules 11, the first rotating component 11a and the second rotating component 11b of the multiple spindle modules 11 can all use the same base 16 as the bearing component, so as to improve the integration level of the rotating shaft mechanism 1. In some other possible embodiments of this application, the rotating shaft mechanism 1 can be provided with a base 16 for each spindle module 11, so that the first rotating component 11a and the second rotating component 11b of each spindle module 11 use the corresponding base 16 as the bearing component.

[0085] To better facilitate the unfolding and folding of the hinge mechanism 1, the hinge mechanism 1 of this application also provides a damping mechanism that provides damping force to the aforementioned rotating components, so that the first and second rotating components can rotate stably under the action of the damping force, thereby preventing accidental opening and closing of the electronic device and enabling the two housings to hover at a set position. Furthermore, the user can clearly feel the movement when unfolding or closing the electronic device, which helps to improve the user experience.

[0086] You can continue to refer to this. Figure 5 and Figure 6The first rotating assembly 11a may include a first rotating arm 112, which is rotatably connected to the base 16. In some embodiments, the first rotating arm 112 may be rotatably connected to the base 16 via a physical shaft. In other embodiments, the first rotating arm 112 and the base may also be rotatably connected via a virtual shaft. For example, an arc-shaped groove may be provided on the base, and an arc-shaped rotating block may be provided on the first rotating arm 112, thereby achieving the rotation of the first rotating arm 112 and the base by sliding the arc-shaped rotating block along the groove surface of the arc-shaped groove. Alternatively, an arc-shaped arm may be provided on the base, and an arc-shaped rotating groove may be provided on the first rotating arm 112, thereby achieving the rotation of the first rotating arm 112 and the base 16 by sliding the arc-shaped arm along the groove surface of the arc-shaped rotating groove.

[0087] In this application, the method of using an arc-shaped groove and an arc-shaped rotating block to achieve rotation around a virtual axis is referred to as a virtual axis rotational connection method. That is, the two rotating entities do not achieve rotation directly through a solid pin, but rather through the aforementioned mating structure.

[0088] In this embodiment, during the folding and unfolding of the electronic device, the first rotating arm 112 and the second rotating arm 120 can slide relative to the first housing and the second housing respectively while rotating around the base, thereby enabling the first housing and the second housing to also rotate relative to the base. Based on this design, this application provides a damping component that can work with the first rotating arm 112 and the second rotating arm 120 to form a damping mechanism, providing damping force for the movement of the first rotating arm 112 and the second rotating arm 120.

[0089] To present the damping mechanism of this application more clearly and completely, before describing the specific arrangement of the damping mechanism in the embodiments of this application, this application will first combine... Figures 4-13 An exemplary implementation of a specific hinge mechanism is provided. This mechanism not only provides damping but also smoothly supports the flexible display screen. During the intermediate state of the electronic device and during unfolding or folding, it ensures uniform force distribution on the bent portion of the flexible display screen. Furthermore, when the electronic device is folded, it provides a space to accommodate the flexible display screen, ensuring that the bent portion maintains a certain degree of curvature to prevent compression. Further, this hinge mechanism also ensures that the length of the flexible display screen remains constant throughout the entire unfolding or folding process of the electronic device, thereby guaranteeing the reliability of the flexible display screen.

[0090] It should be understood that the following embodiments are only one possible implementation of the hinge mechanism for realizing the folding and unfolding function of the electronic device. In other embodiments, other methods may be used. The damping components involved in the embodiments of this application can be applied to any hinge mechanism in which the rotating arm is slidably connected to the housing.

[0091] Next, an exemplary design of the rotating shaft mechanism will be described in detail.

[0092] In this application, the first rotating assembly 11a may further include a first swing arm 113, which is rotatably connected to the base 16. Exemplarily, the first swing arm 113 and the base 16 can be rotatably connected via a virtual axis, as can be seen in the following reference. Figure 7 , Figure 7 This is a schematic diagram of the structure of a first swing arm 113 provided in a possible embodiment of this application. The end of the first swing arm 113 used for connection with the base 16 may be provided with a first arc-shaped rotating block 1131. It should be noted that in this embodiment, the axes of rotation of the first rotating arm 112 and the first swing arm 113 relative to the base 16 are different; that is, the axis of rotation connecting the first rotating arm 112 to the base 16 is different from the axis of rotation connecting the first swing arm 113 to the base 16. Specifically, the two axes are parallel to each other, but do not coincide.

[0093] Additionally, you can refer to Figure 8 , Figure 8 This is a partial structural diagram of the rotating shaft mechanism. The base 16 may be provided with a first arc-shaped groove 163, as described above. Figure 7 The first arc-shaped rotating block 1131 of the first swing arm 113 shown can be accommodated in the first arc-shaped groove 163 and can rotate along the arc surface of the first arc-shaped groove 163, thereby realizing the rotation of the first swing arm 113 around the base 16. By making the first swing arm 113 and the base 16 rotatably connected through a virtual axis, it is beneficial to reduce the space occupied by the first swing arm 113 on the base 16, thereby reducing the volume of the main shaft module 11 and facilitating the miniaturization design of the rotating shaft mechanism 1. It is worth mentioning that, in the embodiments of this application, the first arc-shaped rotating block 1131 may be, but is not limited to, a circular arc-shaped rotating block, and the first arc-shaped groove 163 may be, but is not limited to, a circular arc groove.

[0094] You can continue to refer to this. Figure 8The rotating shaft mechanism 1 may further include a cover plate 114, which can cover the base 16 to form an accommodating space between the cover plate 114 and the base 16. It is worth mentioning that in this application, a separate cover plate 114 can be provided for each spindle module 11 to make its structure more flexible. Alternatively, multiple spindle modules 11 can share a single cover plate 114 to simplify the overall structure of the rotating shaft mechanism 1. The surface of the cover plate 114 facing the first arcuate groove 163 may be provided with a first arcuate protrusion 1141, then the aforementioned... Figure 7 The first arc-shaped rotating block 1131 of the first swing arm 113 shown can be inserted between the first arc-shaped protrusion 1141 and the first arc-shaped groove 163. This allows the first arc-shaped protrusion 1141 to confine the first arc-shaped rotating block 1131 of the first swing arm 113 within the first arc-shaped groove 163 of the base 16, thereby reducing the risk of the first swing arm 113 falling off the base 16 and improving the reliability of the movement of the first swing arm 113.

[0095] In another possible embodiment of this application, the first arc-shaped groove 163 can also be an integral channel structure directly formed on the base 16. This allows for an integrated design of the base 16, improving the structural reliability of the rotating shaft mechanism. Furthermore, the number of first arc-shaped grooves 163 can be, but is not limited to, at least two. These at least two first arc-shaped grooves 163 can be spaced apart along the length of the base 16, and can limit the movement of the first arc-shaped rotating block 1131, thereby improving the reliability of the connection between the first arc-shaped rotating block 1131 and the base 16.

[0096] In other embodiments of this application, the first swing arm 113 and the base 16 can also be rotatably connected via a solid shaft. When the rotating shaft mechanism includes multiple spindle modules 11, the first swing arm 113 of at least one of the spindle modules 11 can be rotatably connected to the base 16 via a virtual shaft, and the first swing arm 113 of at least one spindle module 11 can be rotatably connected to the base 16 via a solid shaft. In this case, the first swing arm 113 of the spindle assembly 101, which is disposed opposite to the flexible display screen, can be rotatably connected to the base 16 via a virtual shaft connection to ensure flat support for the flexible display screen; the first swing arm 113 of the spindle module 11 located at the two ends of the rotating shaft mechanism along its length can be rotatably connected to the base 16 via a solid shaft connection to improve the connection reliability between the overall rotating shaft structure and the first and second housings.

[0097] Can be referenced again Figure 5 and Figure 6 In this embodiment of the application, the first rotating component may further include a first housing fixing frame 115, which may be connected to the first rotating arm 112 and the first swing arm 113.

[0098] When specifically setting the first housing fixing bracket 115, you can refer to Figure 9 , Figure 9 This is a schematic diagram of the structure of a first housing mounting bracket 115 provided for a possible embodiment of this application. In this embodiment, the first housing mounting bracket 115 may be provided with a first sliding groove 1151, which extends along the first housing mounting bracket 115 in a direction (x1 direction) toward or away from the base 16. See also... Figure 6 and Figure 9 The first rotating arm 112 can be installed in the first slide groove 1151 and can slide within the first slide groove 1151. Furthermore, to prevent the first rotating arm 112 from falling out of the first slide groove 1151, a first slide rail 11511 can be provided on the wall of the first slide groove 1151, and a first slider 1121 can be provided on the first rotating arm 112. This allows the first slider 1121 to be engaged with the first slide rail 11511 and to slide along the first slide rail 11511, thereby limiting the movement of the first rotating arm 112 within the first slide groove 1151. Additionally, by providing the first slide rail 11511 on the wall of the first slide groove 1151, it can guide the sliding of the first rotating arm 112 along the first slide groove 1151, thereby improving the stability of the movement of the first rotating arm 112.

[0099] You can continue to refer to Figure 9 The first housing fixing bracket 115 may also be provided with a second sliding groove 1152. The first sliding groove 1151 and the second sliding groove 1152 are spaced apart along the length of the first housing fixing bracket 115. (See also...) Figure 7 and Figure 9 The end of the first swing arm 113 facing the first housing fixing frame 115 can be installed in the second slide groove 1152, and the first swing arm 113 can slide within the second slide groove 1152. It should be noted that in this application, the first housing fixing frame 115 may include a first surface 115a and a second surface 115b arranged opposite to each other. The first surface 115a may be the side surface of the first housing fixing frame 115 facing the flexible display screen when the rotating shaft mechanism 1 is applied to an electronic device. Specifically, the second slide groove 1152 may extend along a direction (y1 direction) from the first surface 115a to the second surface 115b, or from the second surface 115b to the first surface 115a. Furthermore, the projection of the y1 direction onto the first cross-section may not be parallel to the projection of the x1 direction onto the first cross-section. This first cross-section may be a reference plane perpendicular to the rotation axis of the first rotating arm 112 and the rotation axis of the first swing arm 113.

[0100] Additionally, you can continue to refer to... Figure 9In this application, a second slide rail 11521 may also be provided within the second slide groove 1152, and... Figure 7 A second slider 1132 is provided on the first swing arm 113 shown. This allows the second slider 1132 to engage with the second slide rail 11521 and slide along the y-direction within the second slide rail 11521, thus limiting the first swing arm 113 in the second slide rail 1152 and preventing it from falling off. Furthermore, by providing the second slide rail 11521 on the wall of the second slide rail 1152, it provides guidance for the sliding of the first swing arm 113 along the second slide rail 1152, thereby improving the stability of the first swing arm 113's movement.

[0101] As can be seen from the above, in one embodiment of this application, the second rotating component 11b can be symmetrically arranged with respect to the base 16 as the first rotating component 11a. For specific implementation details, please refer again. Figure 5 and Figure 6 The second rotating assembly 11b may also include a second housing fixing frame 119, a second rotating arm 120, and a second swing arm 121. The second housing fixing frame 119 has a third surface 119a and a fourth surface 119b arranged opposite each other. When the rotating shaft mechanism is used in an electronic device, the third surface 119a is the side surface of the second housing fixing frame 119 facing the flexible display screen. Additionally, the second housing fixing frame 119 may include a third slide groove 1191 extending along the x2 direction and a fourth slide groove 1192 extending along the y2 direction. The second rotating arm 120 can slide within the third slide groove 1191, and the second swing arm 121 can slide within the fourth slide groove 1192. The projection of the x2 direction onto the second cross-section is not parallel to the projection of the y2 direction onto the second cross-section. This second cross-section is a reference plane perpendicular to the rotation axis of the second rotating arm 120 and the rotation axis of the second swing arm 121.

[0102] Additionally, you can continue to refer to Figure 6 The third slide groove 1191 may be provided with a third slide rail 11911, the second rotating arm 120 may be provided with a third slider 12001, the fourth slide groove 1192 may be provided with a fourth slide rail 11921, and the second swing arm 121 may be provided with a fourth slider 12102. The arrangement of the third slide rail 11911 can refer to that of the first slide rail 11511, the arrangement of the third slider 12001 can refer to that of the first slider 1121, the arrangement of the fourth slide rail 11921 can refer to that of the second slide rail 11521, and the arrangement of the fourth slider 12102 can refer to that of the second slider 1132; these details will not be elaborated upon here.

[0103] In this application, the second swing arm 121 may be referred to Figure 7 The first swing arm 113 shown is configured to achieve a rotatable connection between the second swing arm 121 and the base 16. (Refer to...) Figure 8 The base 16 may include a second arc-shaped groove 164, and the second swing arm 121 is provided with a second arc-shaped rotating block 12101 (see reference). Figure 6 Alternatively, the surface of the cover plate 114 facing the second arc-shaped groove 164 can be provided with a second arc-shaped protrusion 1142. The second arc-shaped groove 164 can be set with reference to the first arc-shaped groove 163, the second arc-shaped rotating block 12101 can be set with reference to the first arc-shaped rotating block 1131, and the second arc-shaped protrusion 1142 can be set with reference to the first arc-shaped protrusion 1141. These will not be described in detail here.

[0104] Having understood the connection relationship between the first rotating component 11a and the second rotating component 11b and the base 16 provided in the above embodiments of this application, the movement process of the rotating shaft mechanism will be described below. First, refer to... Figure 10a , Figure 10a A schematic diagram of the rotating shaft mechanism in its unfolded state is shown. At this time, the distance between the edge of the first housing fixing frame 115 facing the base 16 and the base 16 is the closest, and the distance between the second slider 1132 of the first swing arm 113 and the first surface 115a of the first housing fixing frame 115 is the closest.

[0105] As described in the above embodiments, when the rotating shaft mechanism rotates from the unfolded state to the closed state, the first rotating arm 112 can slide along the first direction within the first slide groove 1151, and the first swing arm 113 can slide along the second direction within the second slide groove 1152. Similarly, the second rotating arm 120 can slide along x2 within the third slide groove 1191, and the second swing arm 121 can slide along y2 within the fourth slide groove 1192. Figure 10a In the diagram, solid lines with arrows represent the x1 and x2 directions, and dashed lines with arrows represent the y1 and y2 directions. Additionally, please refer to... Figure 10b , Figure 10b A schematic diagram of a first cross-section provided in a possible embodiment is shown, in which the x1 and y1 directions intersect, and the angle of their intersection can be an acute angle as shown in the diagram, or other possible angles, such as a right angle or an obtuse angle. Furthermore, in a second cross-section, the positional relationship between the x2 and y2 directions can be... Figure 10b The positional relationship between the x1 and y1 directions shown is symmetrical, and will not be elaborated here.

[0106] For reference Figure 10c , Figure 10c This is a schematic diagram of the rotating shaft mechanism in its intermediate state. (Comparison) Figure 10c and Figure 10aAs can be seen, during this process, the first housing fixing frame 115 can move away from the base 16 relative to the first rotating arm 112, and drive the first rotating arm 112 and the first swing arm 113 to rotate around the base 16. The first arc-shaped rotating block 1131 of the first swing arm 113 moves in the direction of sliding out of the corresponding first arc-shaped groove 163, thereby reducing the portion of the first arc-shaped rotating block 1131 housed in the corresponding first arc-shaped groove 163. At the same time, the second slider 1132 of the first swing arm 113 slides from the first surface 115a to the second surface 115b of the first housing fixing frame 115 within the second slide rail 11521. Similarly, the second housing fixing frame 119 can drive the second rotating arm 120 and the second swing arm 121 to rotate around the base. The specific movement process is similar to the movement process of the first housing fixing frame 115 driving the first rotating arm 112 and the first swing arm 113 to rotate around the base 16, and will not be described in detail here.

[0107] Additionally, refer to Figure 10d , Figure 10d This is a schematic diagram of the rotating shaft mechanism in the closed state. Figures 10c to 10d During the process, the first housing fixing frame 115 continues to move away from the base 16 relative to the first rotating arm 112, and drives the first rotating arm 112 to rotate around the base 16. The first arc-shaped rotating block 1131 of the first swing arm 113 continues to move in the direction of sliding out of the corresponding first arc-shaped groove 163, thereby further reducing the portion of the first arc-shaped rotating block 1131 housed in the corresponding first arc-shaped groove 163. At the same time, the second slider 1132 of the first swing arm 113 continues to slide in the second groove 1152 along the direction toward the second surface 115b of the first housing fixing frame 115. Similarly, the second housing fixing frame 119 can drive the second rotating arm 120 and the second swing arm 121 to continue to rotate around the base. Its specific movement process is similar to the movement process of the first housing fixing frame 115 driving the first rotating arm 112 and the first swing arm 113 to rotate around the base 16, and will not be described in detail here.

[0108] Understandably, when electronic devices are... Figure 10d The closed state shown Figure 10a When rotated in the unfolded state shown, the first housing fixing frame 115, the first rotating arm 112, and the first swing arm 113, as well as the second housing fixing frame 119, the second rotating arm 120, and the second swing arm 121, can respectively rotate along the aforementioned... Figures 10a to 10d The rotation process is in the opposite direction of the movement, which will not be elaborated here.

[0109] Reference Figure 11 , Figure 11 This is a schematic diagram illustrating the mechanism by which the first rotating arm 112 and the first swing arm 113 slide relative to the first housing fixing frame 115, according to an embodiment of this application. Figure 11 As can be seen, when the first rotating arm 112 and the first swing arm 113 rotate around the base 16 using the rotating shaft mechanism 1 provided in this application, their rotation axes do not coincide. This allows for phase difference between the first rotating arm 112 and the first swing arm 113, thereby achieving the above-mentioned... Figures 10a to 10d The movement process. Furthermore, by rationally designing the opening directions of the first slide groove 1151 and the second slide groove 1152, the rotation angles of the first rotating arm 112 and the first swing arm 113 relative to the base 16 can both be no greater than 90°. Compared with existing solutions, this effectively reduces the rotation angle of the first swing arm 113, thus allowing for improvements in the local structure of the first swing arm 113 (e.g., ...). Figure 7 The wall thickness design of the structure at point A of the first swing arm 113 shown meets the strength requirements, thereby improving the structural reliability of the first swing arm 113. It is understandable that... Figure 11 This can also be used to illustrate the mechanism principle of the sliding of the second rotating arm 120 and the second swing arm 121 relative to the second housing fixing frame 119. As can be seen from the above analysis, in this application, by rationally designing the opening direction of the third slide groove 1191 and the fourth slide groove 1192, the rotation angle of the second rotating arm 120 and the second swing arm 121 relative to the base 16 can be made no greater than 90°, thereby reducing the rotation angle of the second swing arm 121. This allows the wall thickness design of the local structure of the second swing arm 121 to meet the strength requirements, thus improving the structural reliability of the second swing arm 121. Furthermore, when this rotating shaft mechanism 1 is used in electronic devices, it can effectively avoid the need for thinning the components in the electronic device to avoid the rotation of the first swing arm 113 and the second swing arm 121, thereby improving the overall structural reliability of the electronic device.

[0110] Additionally, you can continue to refer to Figure 10d When the rotating shaft mechanism is in the closed state, due to the first rotating arm 112 and the first swing arm 113 being in... Figure 10dAs shown, a supporting force exists in the z-direction for the first housing bracket 115, which effectively improves the kinematic engagement between the first rotating arm 112 and the first swing arm 113 and the first housing bracket 115, and also acts as a stop for the first housing bracket 115 in this direction. Similarly, the second rotating arm 120 and the second swing arm 121 can also provide a supporting force for the second housing bracket 119 in the z-direction, which effectively improves the kinematic engagement between the second rotating arm 120 and the second swing arm 121 and the second housing bracket 119, and also acts as a stop for the second housing bracket 119 in this direction. In this way, even if the electronic device using this rotating mechanism falls in the closed state, the risk of a large instantaneous displacement of the first housing bracket 115 and the second housing bracket 119 relative to the rotating mechanism in this state can be effectively reduced, thereby ensuring the reliability of the overall structure of the electronic device.

[0111] You can refer to it again. Figure 4 In this embodiment of the application, the rotating shaft mechanism may further include a first support plate 12 and a second support plate 13, wherein the first support plate 12 and the second support plate 13 may be respectively disposed on such a bearing as shown in the figure. Figure 5 In one embodiment of this application, the first support plate 12 and the second support plate 13 on opposite sides of the base 16 are symmetrically arranged relative to the base 16.

[0112] In this embodiment, the first support plate 12 and the first housing fixing frame 115 are rotatably connected. It should be noted that the first support plate 12 can be rotatably connected to multiple first housing fixing frames 115 of multiple spindle modules 11, which helps to simplify the structure of the rotating shaft mechanism 1 and improve the structural reliability of the rotating shaft mechanism 1.

[0113] When specifically connecting the first support plate 12 and the first housing fixing frame 115 by rotation, you can first refer to the following: Figure 9 The first housing mounting bracket 115 shown may also be provided with a first rotating groove 1153, which may be an arc-shaped groove. Additionally, see [reference needed]. Figure 12 , Figure 12 This is a schematic diagram of the structure of a first support plate 12 provided in a possible embodiment of this application. A first rotating portion 1201 may be provided at the end of the first support plate 12 facing the first housing fixing frame 115. This first rotating portion 1201 may be arc-shaped, for example, a circular arc. Thus, the first rotating portion 1201 can be installed in the first rotating groove 1153, and the relative rotation between the first support plate 12 and the first housing fixing frame 115 can be achieved by rotating the first rotating portion 1201 along the groove surface of the first rotating groove 1153.

[0114] refer to Figure 13 , Figure 13 This is a schematic diagram of a structure in which a first support plate 12 and a second support plate 13 support a flexible display screen 4, according to a possible embodiment of this application. Since the second support plate 13 is symmetrically arranged with the first support plate 12, when specifically configuring the second support plate 13, it can be rotatably connected to the second housing fixing frame 119. The second housing fixing frame 119 has a second rotating groove 1193. Furthermore, the second support plate 13 can be provided with a second rotating part 1301, which allows the second rotating part 1301 to rotate along the groove surface of the second rotating groove 1193, thereby achieving relative rotation between the second support plate 13 and the second housing fixing frame 119.

[0115] You can refer to them together. Figure 12 and Figure 13 The first support plate 12 may include a first plate surface 12a, which can be used to support the flexible display screen. When the electronic device is in the unfolded state, the first plate surface 12a of the first support plate 12 and the cover plate ( Figure 12 The surface of the cover plate facing the flexible display screen 4 (not shown) can be in the same plane, thereby achieving flat support for the flexible display screen 4. Similarly, the second support plate 13 also has a second plate surface (not shown) for supporting the flexible display screen. When the electronic device is in the unfolded state, the second plate surface of the second support plate 13 and the surface of the cover plate facing the flexible display screen 4 can be in the same plane.

[0116] As mentioned above, by employing the aforementioned rotating shaft mechanism, the rotation axes of the first rotating arm and the first swing arm are not coincident, and the rotation axes of the second rotating arm and the second swing arm are also not coincident. This allows for phase difference between the rotating arm and the swing arm located on the same side during the rotation of the rotating shaft mechanism, thereby enabling the telescopic movement of the two rotating components. This allows the rotating shaft mechanism to stably support the flexible display screen of the electronic device when it is in the extended state, and to form a teardrop-shaped screen-accommodating space that meets the bending requirements of the flexible display screen when it is in the closed state. Furthermore, in this application, by rationally designing the opening directions of the first and second sliding grooves of the first housing fixing frame, and the opening directions of the third and fourth sliding grooves of the second housing fixing frame, the rotation angle of the first and second swing arms relative to the base can be reduced. This allows the wall thickness design of the local structure of the first and second swing arms to meet strength requirements, thereby improving the structural reliability of the first and second swing arms. When this rotating shaft mechanism is applied to electronic devices, it effectively avoids the need for thinning the components in the electronic device to accommodate the rotation of the first and second swing arms, thus improving the overall structural reliability of the electronic device. Furthermore, it can reduce the risk of the flexible display screen of electronic devices being squeezed by the rotation of the first and second swing arms, which can reduce the risk of damage to the flexible display screen and extend its service life.

[0117] After introducing the first and second rotating components of the rotating shaft mechanism, the damping component will be described in detail below.

[0118] In this embodiment, the damping component can be disposed in each spindle module. That is, in addition to the first rotating component and the second rotating component described above, each spindle module also includes a damping component for providing damping force to the first rotating component and the second rotating component. The structure of the damping component will be described in detail below.

[0119] refer to Figure 14 and Figure 15 As shown, Figure 14 This is a partial structural diagram of a rotating shaft mechanism in its unfolded state, provided in an embodiment of this application. Figure 15 for Figure 14 The diagram shows a partial structural schematic of the rotating shaft mechanism in a folded state. Figure 16 for Figure 14 The diagram shows an exploded view of the rotating shaft mechanism. In this embodiment, the damping assembly 17 may include a transmission member 171, a first fixing part 172, and an elastic member 173. The transmission member 171 is slidably disposed on the base along a first direction, while the first fixing part 172 is fixed to the base. The first fixing part 172 and the transmission member 171 are spaced apart in the first direction. One end of the elastic member 173 can elastically abut against the first fixing part 172, and the other end can elastically abut against the transmission member 171, thereby elastically confining it between the transmission member 171 and the first fixing part 172. Specifically, the first direction is the extension direction of the rotation axis of the first rotating arm 112 and the second rotating arm 120, that is, the length direction of the rotating shaft mechanism.

[0120] The transmission member 171 can be located between the first rotating arm 112 and the second rotating arm 120. Furthermore, the first rotating arm 112 may have a first protrusion 1122 on the side facing the transmission member 171, and the side of the first protrusion 1122 facing the transmission member 171 has a first cam surface 11221. Similarly, the second rotating arm 120 may have a second protrusion 12002 on the side facing the transmission member 171, and the side of the second protrusion 12002 facing the transmission member 171 has a second cam surface 120021. That is, the transmission member 171 is located between the first cam surface 11221 of the first rotating arm 112 and the second protrusion 12002 of the second rotating arm 120. Here, the cam surface can be understood as the surface on the first protrusion 1122 or the second protrusion 12002 that is formed by a curved profile. The two sides of the transmission member 171 can respectively abut against the first cam surface 11221 and the second cam surface 120021. In this way, when the first rotating arm 112 and the second rotating arm 120 rotate, the transmission member 171 can slide on the base along the first direction under the pushing of the first rotating arm 112 and the second rotating arm 120 on both sides. This changes the extension and contraction state of the elastic member 173, which is limited between the transmission member 171 and the first fixed part 172. While the elastic member 173 deforms, it also applies a certain elastic force to the transmission member 171. This elastic force can be further transmitted to the first rotating arm 112 and the second rotating arm 120 on both sides through the transmission member 171. This causes the first rotating arm 112 and the second rotating arm 120 to be subjected to a radial abutment force from the transmission member 171 during rotation. This abutment force can be converted into a damping force for the first rotating arm 112 and the second rotating arm 120 to rotate relative to the base. This allows the first rotating arm 112 and the second rotating arm 120 to rotate stably under the action of the damping force. It should be noted that the radial direction in this embodiment can be understood as the direction closer to or farther from the base. Specifically, in this solution, the radial abutment force from the transmission member 171 on the first rotating arm 112 is an abutment force farther from the base, and the radial abutment force from the transmission member 171 on the second rotating arm 120 is also an abutment force farther from the base. The forces on the first rotating arm 112 and the second rotating arm 120 are opposite in direction and approximately equal in magnitude.

[0121] In some possible embodiments, the damping assembly 17 may further include a second fixing part 174, which can be fixed to the base and abut against the side of the transmission member 171 opposite to the first fixing part 172, thereby positioning the transmission member 171 on that side. Furthermore, the second fixing part 174 and the base may be fixedly connected by, but not limited to, threaded fasteners such as screws and bolts, snap-fit ​​connections, or adhesive bonding. Similarly, the first fixing part 172 and the base may also be fixedly connected in the above manner, which will not be elaborated further here.

[0122] Additionally, the damping assembly 17 may also include a sliding portion 175, which is slidably disposed on the base along a first direction. The sliding portion 175 abuts against the side of the transmission member 171 facing the first fixed portion 172. In this case, both ends of the elastic member 173 can elastically abut against the first fixed portion 172 and the sliding portion 175, respectively. When the transmission member 171 slides along the first direction under the pushing force of the first rotating arm 112 and the second rotating arm 120 on both sides, it drives the sliding portion 175 to slide synchronously. The sliding portion 175 then compresses the elastic member 173, and the elastic force generated by the elastic member 173 can be transmitted sequentially to the first rotating arm 112 and the second rotating arm 120 through the sliding portion 175 and the transmission member 171. In this embodiment, the width of the sliding portion 175 may be approximately equal to the width of the first fixed portion 172 to reliably limit the elastic member disposed between them, thereby reliably transmitting the elastic force to the transmission member 171.

[0123] When the transmission member 171 is slidably mounted on the base, the damping assembly 17 may further include a guide rod 176, which is fixedly mounted on the base along the first direction. Exemplarily, both ends of the guide rod may be fixedly connected to the first fixing part 172 and the second fixing part 174, respectively. In this case, both the transmission member 171 and the sliding part 175 can be sleeved on the guide rod 176, thereby guiding the sliding of the transmission member 171 and the sliding part 175 using the guide rod 176, improving the sliding stability of both in the first direction.

[0124] Please refer to the above. Figures 14 to 17 As shown, Figure 17 for Figure 14 The diagram shows a cross-sectional view of the rotating shaft mechanism at point AA. In this embodiment, the transmission member 171 may include a first cam 1711 and a second cam 1712, wherein the first cam 1711 is located near the first rotating arm 112, and the second cam 1712 is located near the second rotating arm 120. The first cam 1711 abuts against the first cam surface 11221 of the first rotating arm 112, and the second cam 1712 abuts against the second cam surface 120021 of the second rotating arm 120. Figure 16As can be seen, the side of the first cam 1711 facing the first rotating arm 112 may have a third cam surface 17111, and the side of the second cam 1712 facing the second rotating arm 120 may have a fourth cam surface 17121. In this case, the first cam 1711 and the first rotating arm 112, and the second cam 1712 and the second rotating arm 120, can respectively form cam pairs. When the first rotating arm 112 and the second rotating arm 120 rotate, the first cam 1711 and the second cam 1712 can slide towards each other (closer to each other) or slide away from each other (away from each other). In this embodiment, the first cam 1711 and the second cam 1712 can be designed to slide towards each other when the first rotating arm 112 and the second rotating arm 120 rotate in the direction of folding the electronic device, and to slide away from each other when the first rotating arm 112 and the second rotating arm 120 rotate in the direction of unfolding the electronic device. This can be achieved through the design of the curved contours of the first cam surface 11221, the second cam surface 12021, the third cam surface 17111, and the fourth cam surface 17121. It is understood that through the reasonable design of the curved contours of the above-mentioned cam surfaces, the first rotating arm 112 and the second rotating arm 120 can also be made to hover at a set rotation angle, thereby improving the user experience.

[0125] Please refer to the above. Figure 18 As shown, Figure 18 for Figure 14 The diagram shows the structure of the transmission component 171. The side of the first cam 1711 facing the second cam 1712 may also have a first inclined surface 17112, and the side of the second cam 1712 facing the first cam 1711 may have a second inclined surface 17122. The first inclined surface 17112 and the second inclined surface 17122 may be arranged parallel to form an inclined surface transmission pair. When the first cam 1711 and the second cam 1712 slide towards each other or away from each other, at least one of the cams can slide along a first direction due to the force on its own inclined surface, thereby compressing the elastic element 173.

[0126] Please refer to the above. Figure 18 and Figure 19 As shown, Figure 19This is a schematic diagram of the structure of the second fixing part and the sliding part provided in an embodiment of this application. In a specific embodiment, the second fixing part 174 may have a first protrusion 1741 on the side facing the transmission member 171, the first protrusion 1741 has a third inclined surface 17411 on the side facing the first cam 1711, and a fourth inclined surface 17412 on the side facing the second cam 1712. In this case, the first inclined surface 17112 of the first cam 1711 may be located at one end of the first cam 1711 near the second fixing part 174, and the first inclined surface 17112 and the third inclined surface 17411 may be arranged parallel to each other and abut against each other. Similarly, the second inclined surface 17122 of the second cam 1712 may be located at one end of the second cam 1712 near the second fixing part 174, and the second inclined surface 17122 and the fourth inclined surface 17412 may be arranged parallel to each other and abut against each other.

[0127] Combination Figures 14 to 19 As shown, during the rotation of the first rotating arm 112 and the second rotating arm 120 toward the direction of unfolding the electronic device (i.e., the first rotating arm 112 and the second rotating arm 120 rotate in opposite directions), based on the inclined plane transmission pair formed by the first inclined plane 17112 and the third inclined plane 17411, when the first rotating arm 112 drives the first cam 1711 to slide toward the side closer to the second cam 1712, the first cam 1711 will simultaneously slide toward the side away from the second fixed part 174 under the abutment action of the third inclined plane 17411. In other words, the actual movement trajectory of the first cam 1711 is sliding along the inclined direction of the third inclined plane 17411. Similarly, based on the inclined plane transmission pair formed by the second inclined plane 17122 and the fourth inclined plane 17412, when the second rotating arm 120 drives the second cam 1712 to slide towards the side closer to the first cam 1711, the second cam 1712 will simultaneously slide towards the side away from the second fixed part 174 under the abutment of the fourth inclined plane 17412. That is, the actual movement trajectory of the second cam 1712 is sliding along the inclination direction of the fourth inclined plane 17412. It can be seen that during this process, both the first cam 1711 and the second cam 1712 can generate sliding motion in the first direction, thus both can jointly compress the elastic element 173. It can be seen that during the unfolding of the electronic device, the compression of the elastic element 173 provides the user with a more noticeable tactile feedback, which is beneficial to improving the user experience.

[0128] During the rotation of the first rotating arm 112 and the second rotating arm 120 toward the direction of folding the electronic device (i.e., the first rotating arm 112 and the second rotating arm 120 rotate toward each other), the elastic element 173 gradually rebounds from its compressed state and releases the accumulated elastic potential energy, thereby pushing the first cam 1711 and the second cam 1712 to slide away from the first fixed part 172. Based on the inclined plane transmission pair composed of the first inclined surface 17112 and the third inclined surface 17411, the first cam 1711, while sliding toward the second fixed part 174, also generates a displacement toward the first rotating arm 112, thereby applying a torque to the first rotating arm 112 to assist its rotation. Similarly, based on the inclined plane transmission pair composed of the second inclined surface 17122 and the fourth inclined surface 17412, the second cam 1712, while sliding toward the second fixed part 174, also generates a displacement toward the second rotating arm 120, thereby applying a torque to the second rotating arm 120 to assist its rotation. It can be seen that during the folding process of the electronic device, the elastic potential energy released by the elastic element 173 can provide a certain folding assistance to the pivot mechanism, thereby reducing the difficulty of folding the electronic device.

[0129] The specific shape of the first protrusion 1741 is not limited. For example, the first protrusion 1741 can be a triangular protrusion. In this case, the width of the first protrusion 1741 is relatively small, which helps to reduce the overall width of the rotating shaft mechanism. Further, the first protrusion 1741 can specifically be an isosceles triangular protrusion, that is, the inclination angles of the third inclined surface 17411 and the fourth inclined surface 17412 relative to the first direction can be equal. In this way, when the first cam 1711 and the second cam 1712 slide towards each other, their sliding distances in the first direction can also remain the same, thereby generating the same amount of compression on the elastic element 173. This allows the first rotating arm 112 and the second rotating arm 120 to be subjected to damping forces of equal magnitude, improving the working reliability of the damping assembly 17.

[0130] Of course, in other embodiments, the first protrusion 1741 can also be a trapezoidal or other polygonal structure, as long as it can realize the features of the third inclined surface 17411 and the fourth inclined surface 17412, which will not be elaborated here.

[0131] Based on the same principle, displacement can also be transmitted between the first cam 1711, the second cam 1712, and the sliding part 175 via a ramp transmission pair. Specifically, the first cam 1711 has a fifth ramp 17113 facing the second cam 1712 at the end near the sliding part 175, and the second cam 1712 has a sixth ramp 17123 facing the first cam 1711 at the end near the sliding part 175. A second protrusion 1751 can be provided on the side of the sliding part 175 facing the transmission member 171; the second protrusion 1751 has a seventh ramp 17511 on the side facing the first cam 1711 and an eighth ramp 17512 on the side facing the second cam 1712. The fifth inclined surface 17113 of the first cam 1711 is parallel to and abuts against the seventh inclined surface 17511 of the second protrusion 1751. The sixth inclined surface 17123 of the second cam 1712 is parallel to and abuts against the eighth inclined surface 17512 of the second protrusion 1751. In specific implementations, the second protrusion 1751 can also be triangular, trapezoidal, or other shapes, as long as it can realize the characteristics of the seventh inclined surface 17511 and the eighth inclined surface 17512. Further details are omitted here.

[0132] During the rotation of the first rotating arm 112 and the second rotating arm 120 toward the direction of folding the electronic device, the inclined plane transmission pair composed of the fifth inclined plane 17113 and the seventh inclined plane 17511, and the transmission pair composed of the sixth inclined plane 17123 and the eighth inclined plane 17512, when the first cam 1711 and the second cam 1712 slide toward the side closer to the first fixed part 172, the first cam 1711 will apply a force F1 perpendicular to the fifth inclined plane 17113 to the sliding part 175, and the second cam 1712 will apply a force F2 perpendicular to the sixth inclined plane 17123 to the sliding part 175. It can be understood that the radial components of F1 and F2 (i.e., the width direction of the base) are opposite in direction and can therefore cancel each other out. The components of F1 and F2 in the first direction are in the same direction and can therefore be superimposed on the sliding part 175, thereby pushing the sliding part 175 to slide along the first direction and causing the sliding part 175 to compress the elastic member 173.

[0133] As the first rotating arm 112 and the second rotating arm 120 rotate toward the direction of folding the electronic device, the elastic element 173 gradually rebounds from its compressed state, releasing the accumulated elastic potential energy, thereby pushing the sliding part 175 to slide away from the first fixed part 172. Utilizing the inclined plane transmission pair formed by the fifth inclined plane 17113 and the seventh inclined plane 17511, the first cam 1711, while sliding toward the second fixed part 174, also generates a displacement toward the first rotating arm 112. Similarly, utilizing the transmission pair formed by the sixth inclined plane 17123 and the eighth inclined plane 17512, the second cam 1712, while sliding toward the second fixed part 174, also generates a displacement toward the second rotating arm 120. With the aforementioned inclined plane transmission pair consisting of the first inclined plane 17112 and the third inclined plane 17411, and the inclined plane transmission pair consisting of the second inclined plane 17122 and the fourth inclined plane 17412, it can be seen that in this process, the first cam 1711 actually slides radially under the combined action of the seventh inclined plane 17511 and the third inclined plane 17411, while the second cam 1712 slides radially under the combined action of the eighth inclined plane 17512 and the fourth inclined plane 17412. Therefore, the motion reliability of the damping assembly 17 can be effectively improved.

[0134] As can be seen from the above description, the damping component 17 provided in this application embodiment, through the inclined transmission pair formed by the first cam 1711 and the second cam 1712, can convert the elastic force generated by the elastic element 173 in the axial direction (i.e., the first direction) of the rotating shaft mechanism into a radial force and transmit it to the first rotating arm 112 and the second rotating arm 120. Since the elastic element 173 is arranged along the axial direction of the rotating shaft mechanism, the size of the elastic element 173 is not limited by other components of the electronic device (such as the motherboard, battery, etc.). Therefore, the size of the elastic element 173 can be appropriately increased to ensure that sufficient damping force is provided for the electronic device, thereby avoiding the limitation problem of the opening and closing force of the electronic device. In addition, given the trend of thinner design of electronic devices, the thickness of the rotating shaft mechanism is reduced accordingly. In comparison, the axial space of the rotating shaft mechanism is relatively abundant. Therefore, the axial dimensions of the first cam 1711 and the second cam 1712 can be appropriately increased during the design to increase their contact area with the rotating arm on the corresponding side. This can reduce the contact stress of the first cam 1711 and the second cam 1712 while ensuring that the space is sufficient, thereby improving the life of the two cams.

[0135] Continue to refer to Figure 15 , Figure 16 and Figure 18A first groove 17114 may be provided on the side of the first cam 1711 facing the second cam 1712. The first groove 17114 may be located on the side of the first inclined surface 17112 away from the second fixing part 174. Correspondingly, a first protrusion 17124 may be provided on the side of the second cam 1712 facing the first cam 1711. The first protrusion 17124 may be located on the side of the second inclined surface 17122 away from the second fixing part 174. The first protrusion 17124 may be slidably disposed in the first groove 17114, and the side wall of the first protrusion 17124 away from the second fixing part 174 may abut against the inner wall of the first groove 17114. By utilizing the cooperation between the first protrusion 17124 and the first groove 17114, on the one hand, the sliding of the first cam 1711 and the second cam 1712 towards each other or away from each other can be guided, and on the other hand, the sliding of the first cam 1711 and the second cam 1712 in the first direction can be linked, thereby further ensuring that the first cam 1711 and the second cam 1712 can maintain synchronous sliding in the first direction.

[0136] Furthermore, a second protrusion 17115 may be provided on the side of the first cam 1711 facing the second cam 1712, and correspondingly, a second groove 17125 may be provided on the side of the second cam 1712 facing the first cam 1711. The second protrusion 17115 is slidably disposed within the second groove 17125, and the side wall of the second protrusion 17115 facing the second fixing part 174 can abut against the inner wall of the second groove 17125. Similarly, the mating and insertion of the second protrusion 17115 and the second groove 17125 can guide the relative sliding of the first cam 1711 and the second cam 1712 towards or away from each other, and provide a guarantee for the synchronous sliding of the first cam 1711 and the second cam 1712 in the first direction, thereby further improving the operational reliability of the damping assembly 17.

[0137] In this embodiment, the specific form of the elastic element 173 is not limited; for example, it can be a spring 1731 or a sheet spring 1732. Of course, reference can also be made to... Figure 14 and Figure 15 As shown, a design is adopted in which spring 1731 and spring piece 1732 are shared. With this design, there can be multiple springs 1731 and multiple spring pieces 1732. The two ends of each spring 1731 abut against the first fixed part 172 and the sliding part 175, respectively. Multiple spring pieces 1732 can be stacked between the first fixed part 172 and the sliding part 175 along a first direction. The specific number of springs 1731 and spring pieces 1732 can be set according to the magnitude of the damping force required by the damping assembly and the space available in the rotating shaft mechanism. Figure 14 and Figure 15The diagram shows the case of two springs. In this case, the two springs 1731 can be set on both sides of the multiple spring pieces 1732 to ensure the uniformity of the force on the sliding part, which in turn helps to transmit a balanced damping force to the first rotating arm 112 and the second rotating arm 120.

[0138] Understandably, in order to ensure that the spring piece 1732 can be reliably limited between the first fixed part 172 and the sliding part 175, in specific implementation, multiple spring pieces 1732 can be sequentially sleeved on the aforementioned guide rod 176, thereby preventing the spring piece 1732 from shifting when elastic deformation occurs and improving the working reliability of the damping assembly 17.

[0139] Similarly, when the spring 1731 is limited between the first fixed part 172 and the sliding part 175, the damping assembly 17 may also include a first pin 177 corresponding to the spring 1731. The first pin 177 can pass through the first fixed part 172, the sliding part 175 and the second fixed part 174 in sequence along the first direction. The spring 1731 is sleeved on the first pin 177, thereby avoiding problems such as arching when the spring 1731 undergoes elastic deformation. In this embodiment, a first locking block 1721 may be provided on the side of the first fixed part 172 away from the sliding part 175. The first locking block 1721 is provided with a slot 17211 corresponding to the position of the first pin 177. One end of the first pin 177 can extend from the first fixed part 172 and be engaged in the slot 17211. Correspondingly, a second locking block 1742 may be provided on the side of the second fixing part 174 opposite to the first fixing part 172. A locking hole 17421 may be provided on the second locking block 1742 corresponding to the position of the first pin 177, and the other end of the first pin 177 may be locked into the locking hole 17421. In this way, the relative fixation of the first pin 177 and the base can be achieved by the locking action of the first locking block 1721 and the second locking block 1742.

[0140] Furthermore, as mentioned above, the first rotating arm 112 and the second rotating arm 120 can be rotatably connected to the base either via a physical shaft or via a virtual shaft. When the first rotating arm 112 and the second rotating arm 120 are rotatably connected to the base via a physical shaft, the aforementioned first pin 177 can be used as a physical shaft connecting the first rotating arm 112 or the second rotating arm 120 to the base. In this case, the first pin 177 located on the side of the first rotating arm 112 can pass through the first protrusion 1122 of the first rotating arm 112, and the first pin 177 located on the side of the second rotating arm 120 can pass through the second protrusion 12002 of the second rotating arm, thus realizing the rotatable connection between the first rotating arm 112 and the second rotating arm 120 and the base.

[0141] In addition to the structures described above, in some embodiments of this application, the rotating shaft mechanism may also have other possible structures. Please refer again. Figure 14 , Figure 15 and Figure 16 In this embodiment, the rotating shaft mechanism may further include a synchronization component 18. The synchronization component 18 may include a first drive gear 181 disposed on the side of the first rotating arm 112 facing the second rotating arm 120, and a second drive gear 182 disposed on the side of the second rotating arm 120 facing the first rotating arm 112, with the first drive gear 181 and the second drive gear 182 being connected in a transmission manner. Thus, during the rotation of one swing arm around the base, it can drive the other swing arm to rotate synchronously around the base in opposite or opposing directions, and the rotation angles of the two swing arms can remain consistent.

[0142] To improve the stability of the synchronous component's movement, the first drive gear 181 and the second drive gear 182 can be respectively fitted onto the corresponding first pin 177. For example, along the first direction, the first drive gear 181 can be located on the side of the first protrusion 1122 opposite to the first fixed portion 172, and the first drive gear 181 and the first protrusion 1122 can be spaced apart. Similarly, the second drive gear 182 can also be located on the side of the second protrusion 12002 opposite to the first fixed portion 172, and the second drive gear 182 and the second protrusion 12002 can be spaced apart. In this case, the side of the second fixed portion 174 facing the first rotating arm 112 can be fitted between the first protrusion 1122 and the first drive gear 181, and the side of the second fixed portion 174 facing the second rotating arm 120 can be fitted between the second protrusion 12002 and the second drive gear 182, thereby helping to improve the compactness of the rotating shaft mechanism.

[0143] refer to Figure 20 As shown, Figure 20 for Figure 14 The diagram shows a cross-sectional view of the rotating shaft mechanism at point BB. In this embodiment, the synchronization component 18 may further include a driven gear 183, which may be disposed between two driving gears. Furthermore, the number of driven gears 183 may be even, and adjacent driven gears 183 mesh with each other and with driving gears, thereby enabling the first driving gear 181 and the second driving gear 182 to rotate in opposite directions or in opposite directions through the even number of driven gears 183.

[0144] In addition, the synchronization component 18 may also include gear shafts 1831 corresponding one-to-one with the driven gears 183. Along the first direction, both ends of the gear shafts 1831 can be fixedly connected to the second fixing part 174 and the second locking block 1742, respectively. Each driven gear 183 can be respectively sleeved on its corresponding gear shaft 1831, thereby improving the smoothness of the synchronization component's movement. Of course, in some other embodiments, the gear shafts 1831 can also be rotatably connected to the second fixing part 174 and the second locking block 1742 at both ends, in which case the driven gear 183 can be fixed on its corresponding gear shaft 1831. In this embodiment, the driven gear 183 and its corresponding gear shaft 1831 can be fixedly connected by a key connection, or they can be designed as an integral structure; this application does not impose specific limitations on this.

[0145] It is worth mentioning that, in this embodiment, the synchronization component 18 can be accommodated within the space formed by the cover plate and the base, making the structure of the rotating shaft mechanism more compact. By setting the synchronization component 18, during the rotation of one swing arm around the base, the other swing arm can be driven to rotate synchronously around the base in opposite or opposite directions. Simultaneously, since each swing arm can slide along the groove of the corresponding side of the housing fixing frame, during the rotation of the swing arm around the base, the housing fixing frame on the same side can be driven to rotate at the same angle, thus achieving synchronous rotation of the two housing fixing frames during the synchronous rotation of the two swing arms. Furthermore, since the housing fixing frame can be fixedly connected to the housing of the electronic device, the synchronous rotation of the two housing fixing frames can drive the two housings of the electronic device to rotate synchronously. This avoids applying instantaneous force to the flexible display screen fixed to the two housings, which is beneficial to improving the reliability of the flexible display screen.

[0146] refer to Figure 21 As shown, Figure 21 This is a partial structural diagram of another rotating shaft mechanism provided in this application embodiment when it is in the unfolded state. In this embodiment, the damping component 17 also includes a transmission component 171, a first fixing part 172, an elastic component 173, a second fixing part 174, and a sliding part 175. The structure and arrangement of the transmission component 171, the first fixing part 172, and the second fixing part 174 are generally the same as in the previous embodiment, and these components will not be described in detail here. Unlike the previous embodiment, in this embodiment, the elastic component 173 can all be in the form of springs 1731. The specific number of springs 1731 can be set according to the magnitude of the damping force required by the damping component 17 and the space of the rotating shaft mechanism, etc., and this application does not limit this. Figure 17 The diagram shows an elastic element comprising four springs 1731, with each spring 1731 having its two ends abutting against the first fixed portion 172 and the sliding portion 175, respectively.

[0147] Specifically, the two springs 1731 located on both sides can be respectively sleeved on the two first pins 177 to prevent problems such as arching during elastic deformation. Additionally, the damping assembly 17 may include two second pins 178 located between the two first pins 177. The second pins 178 can sequentially pass through the first fixing part 172 and the sliding part 175 along a first direction. One end of the second pin 178 extends from the first fixing part 172 and engages with the first locking block 1721, while the other end can slidably connect with the sliding part 175 to guide its sliding in the first direction. In this case, the two middle springs 1731 can be respectively sleeved on the corresponding second pins 178, thereby using the second pins 178 to limit the deformation direction of the springs 1731 sleeved on them.

[0148] Continue to refer to Figure 21 In this embodiment, when the guide rod 176 is provided, one end of the guide rod 176 can be fixedly connected to the first fixed part 172, and the other end can be slidably connected to the sliding part 175. That is, in addition to being slidably connected to the first pin 177 and the second pin 178, the sliding part 175 can also be slidably mounted on the guide rod 176. Since the two middle second pins 178 are positioned opposite the guide rod 176 in the first direction, the end of the sliding part 175 facing the first fixed part 172 can be slidably mounted on the guide rod 176, and the end facing the second fixed part 174 can be slidably mounted on the two second pins 178. It is understood that, in order to prevent the sliding part 175 from slipping off the second pins 178 when sliding towards the second fixed part 174, or slipping off the guide rod 176 when sliding towards the first fixed part 172, the length of the middle region of the sliding part 175 in the first direction can be appropriately increased in the specific design to improve the smoothness of the movement of the sliding part 175.

[0149] refer to Figure 22 As shown, Figure 22 This is a partial structural diagram of another rotating shaft mechanism provided in an embodiment of this application when it is in the unfolded state. In this embodiment, the damping component 17 may also include a transmission member 171, a first fixing part 172, an elastic member 173, a second fixing part 174, and a sliding part 175. The structures of the elastic member 173 and the first fixing part 172 can be referred to... Figure 14 The embodiment shown is configured such that the structure of the transmission member 171, the sliding part 175, and the second fixing part 174 is compared to... Figure 14 The illustrated embodiment differs somewhat. Specifically, the second fixing part 174 no longer has a first protrusion on the side facing the transmission member 171, but instead has a planar structure. Similarly, the sliding part 175 can also be designed as a planar structure on the side facing the transmission member.

[0150] In the specific configuration of the transmission component 171, the end of the first cam 1711 facing the second fixed part 174 can abut against the second fixed part 174, and the end of the second cam 1712 facing the sliding part 175 can abut against the sliding part 175. Furthermore, the first inclined surface 17112 of the first cam 1711 and the second inclined surface 17122 of the second cam 1712 can be arranged parallel to each other and abut against each other, thus forming an inclined surface transmission pair between the first inclined surface 17112 and the second inclined surface 17122.

[0151] When the first rotating arm 112 and the second rotating arm 120 rotate in the direction of unfolding the electronic device, the first cam 1711 and the second cam 1712 slide towards each other. At this time, the second inclined surface 17122 of the second cam 1712 applies a component force towards the second fixed part 174 to the first cam 1711. Since the first cam 1711 and the second fixed part 174 are in contact, the first cam 1711 only has radial displacement during the rotation of the first rotating arm 112 and will not have displacement along the first direction. Conversely, the first inclined surface 17112 of the first cam 1711 applies a reaction force towards the first fixed part 172 to the second cam 1712. Driven by this reaction force, the second cam 1712 slides towards the first cam 1711 while also having a displacement towards the first fixed part 172. In other words, the actual movement trajectory of the second cam 1712 is a slide along the inclined direction of the first inclined surface 17112. In this way, the second cam 1712 can drive the sliding part 175 to slide synchronously towards the side closer to the first fixed part 172, thereby compressing the elastic element 173. The elastic force generated by the elastic element 173 can be transmitted to the second cam 1712 through the sliding part 175, and can be transmitted to the first cam 1711 through the second cam 1712, and then transmitted to the swing arms on both sides by the first cam 1711 and the second cam 1712 respectively.

[0152] When the first rotating arm 112 and the second rotating arm 120 move in opposite directions toward the direction of folding the electronic device, the elastic element 173 gradually rebounds from its compressed state and releases the accumulated elastic potential energy, pushing the second cam 1712 to slide toward the second fixed part 174. At this time, the first inclined surface 17112 of the first cam 1711 applies a component force toward the second rotating arm 120 to the second cam 1712, so that while the second cam 1712 slides toward the second fixed part 174, it also generates a displacement toward the second rotating arm 120, thereby applying a torque to the second rotating arm 120 to assist its rotation. Conversely, the second inclined surface 17122 of the second cam 1712 applies a reaction force toward the first rotating arm 112 to the first cam 1711. Driven by this reaction force, the first cam 1711 also slides toward the first rotating arm 112, thereby applying a torque to the first rotating arm 112 to assist its rotation. It can be seen that, in this process, the elastic potential energy released by the elastic element 173 can provide a certain folding assistance to the rotating shaft mechanism, thereby reducing the difficulty of opening and closing the electronic device.

[0153] refer to Figure 23 As shown, Figure 23 This is a partial structural diagram of another rotating shaft mechanism provided in an embodiment of this application when it is in the unfolded state. In this embodiment, the damping component 17 may also include a transmission member 171, a first fixing part 172, an elastic member 173, a second fixing part 174, and a sliding part 175. The structure of the transmission member 171, the first fixing part 172, and the sliding part 175 can be referred to... Figure 20 The embodiment shown is configured as described above. The difference is that in this embodiment, the elastic element 173 can be entirely in the form of springs 1731. The specific number of springs 1731 can be set according to the magnitude of the damping force required by the damping component 17 and the space of the rotating shaft mechanism, etc., and this application does not impose any restrictions on this. Figure 23 The diagram shows an elastic element 173 comprising four springs 1731, with each spring 1731 having its two ends abutting against the first fixed portion 172 and the sliding portion 175, respectively.

[0154] When specifically setting the elastic element 173, and... Figure 21Similar to the illustrated embodiment, the two springs 1731 on both sides can be respectively sleeved on the two first pins 177. For the two springs 1731 in the middle, two second pins 178 can be provided between the two first pins 177. The second pins 178 can pass through the first fixing part 172 and the sliding part 175 in sequence along the first direction. One end of the second pin 178 can extend from the first fixing part 172 and be engaged in the first locking block 1721, while the other end of the second pin 178 can be slidably connected to the sliding part 175 to guide the sliding of the sliding part 175 in the first direction. At this time, the two springs 1731 in the middle can be respectively sleeved on the corresponding second pins 178, thereby using the second pins 178 to limit the deformation direction of the springs 1731 sleeved on them.

[0155] Furthermore, since the two middle second pins 178 are positioned opposite the guide rod 176 in the first direction, the end of the sliding part 175 facing the first fixed part 172 can be slidably mounted on the guide rod 176, while the end facing the second fixed part 174 can be slidably mounted on the two second pins 178. To prevent the sliding part 175 from slipping off the second pins 178 when sliding towards the second fixed part 174, or from slipping off the guide rod 176 when sliding towards the first fixed part 172, the length of the middle region of the sliding part 175 in the first direction can be appropriately increased in the specific design to improve the smoothness of the movement of the sliding part 175.

[0156] refer to Figure 24 As shown, Figure 24 This is a partial structural diagram of another rotating shaft mechanism provided in this application embodiment when it is in the unfolded state. In this embodiment, in addition to the transmission component 171, the first fixed part 172, the elastic component 173, the second fixed part 174, and the sliding part 175, the damping component may also include an intermediate gear 179. Specifically, the first inclined surface 17112 of the first cam 1711 may be provided with a first rack 171121, the second inclined surface 17122 of the second cam 1712 may be provided with a second rack 171221, and the intermediate gear 179 is disposed between the first inclined surface 17112 and the second inclined surface 17122, and the intermediate gear 179 meshes with the first rack 171121 and the second rack 171221 on both sides respectively. When the first cam 1711 and the second cam 1712 slide towards or away from each other, the two sides of the intermediate gear 179 roll on the first rack 171121 and the second rack 171221 respectively. This ensures the synchronicity of the sliding of the first cam 1711 and the second cam 1712 towards or away from each other, thereby helping to further improve the working reliability of the damping assembly 17.

[0157] Furthermore, the structures of the first fixing part 172, the second fixing part 174, the sliding part 175, and the elastic member 173 in this embodiment can be referred to Figure 23 The embodiments shown are configured as described above, and will not be elaborated further here.

[0158] refer to Figure 25 As shown, Figure 25 This is a partial structural diagram of another rotating shaft mechanism provided in an embodiment of this application when it is in the unfolded state. In this embodiment, the damping component 17 may include a transmission member 171, a first fixing part 172, an elastic member 173, and a second fixing part 174, wherein the first fixing part 172, the second fixing part 174, and the elastic member 173 are as follows: Figure 23 The illustrated embodiment is configured accordingly. (And...) Figure 23 Unlike the illustrated embodiment, the sliding portion is omitted in this embodiment. Therefore, the end of the second cam 1712 of the elastic member 173 facing the first fixed portion 172 can directly elastically abut against the elastic member 173. In other words, the elastic member 173 is confined between the second cam 1712 and the first fixed portion 172. This design can simplify the structure of the damping assembly 17 to a certain extent, thereby reducing the assembly difficulty of the rotating shaft mechanism and also helping to reduce the cost of the rotating shaft mechanism.

[0159] It should be noted that when the elastic element 173 includes multiple springs 1731, in order to reliably limit the springs 1731 located near the edge, in this embodiment, a first extension 17126 and a second extension 17127 can be provided at one end of the second cam 1712 facing the first fixing part 172. The first extension 17126 extends towards the side where the first rotating arm 112 is located, and the second extension 17127 extends towards the side where the second rotating arm 120 is located. The first extension 17126 and the second extension 17127 can be respectively sleeved on the first pins 177 on both sides. In this way, the springs 1731 located on both sides can be respectively limited between the first extension 17126 and the first fixing part 172, and between the second extension 17127 and the first fixing part 172.

[0160] refer to Figure 26 As shown, Figure 26 This is a partial structural diagram of another rotating shaft mechanism provided in an embodiment of this application when it is in the unfolded state. In this embodiment, the damping component 17 may include a transmission member 171, a first fixing part 172, an elastic member 173, and a sliding part 175, wherein the first fixing part 172, the sliding part 175, and the elastic member 173 are as follows: Figure 23 The illustrated embodiment is configured accordingly. (And...) Figure 23Unlike the illustrated embodiment, this application embodiment omits the second fixing part. In this case, the end of the first cam 1711 facing away from the first fixing part 172 can abut against the end face of the first driving gear 181, the end face of the second driving gear 182, and the end faces of the two driven gears 183. This design can also simplify the structure of the damping assembly, thereby helping to reduce the assembly difficulty and cost of the shaft mechanism.

[0161] Utilizing the inclined transmission pair formed by the first inclined surface of the first cam 1711 and the second inclined surface of the second cam 1712, during the rotation of the first rotating arm 112 and the second rotating arm 120, the first cam 1711 can slide towards or away from the second cam 1712 in a radial direction, while the second cam 1712 simultaneously has radial displacement and displacement in the first direction. Therefore, the second cam 1712 can slide towards the first cam 1711 while pushing the sliding part 175 towards the side of the first fixed part 172 to compress the elastic member 173, or it can be pushed by the sliding part 175 towards the side away from the first fixed part 172 when the elastic member 173 rebounds, and slide away from the first cam 1711 under the mutual contact of the first inclined surface and the second inclined surface, so that the first cam 1711 and the second cam 1712 apply a torque to assist the rotation of the first rotating arm 112 and the second rotating arm 120.

[0162] It should be noted that, in this embodiment, since the first cam 1711 has radial displacement, when specifically setting the two driven gears 183, one end of the gear shaft can be fixedly or rotatably connected to the second locking block 1742, while the other end does not extend beyond the end face of the driven gear 183, so as to avoid interference with the first cam 1711. Furthermore, in some embodiments, wear-resistant plates can be provided on the end faces of each driving gear and driven gear 183 to reduce the frictional wear caused by the first cam 1711 during sliding, thereby improving the structural strength of the rotating shaft mechanism.

[0163] Understandably, in some other embodiments, the damping assembly 17 may also omit the sliding part and the second fixing part. In this case, the end of the first cam 1711 facing away from the first fixing part 172 can abut against the end face of the first driving gear 181, the end face of the second driving gear 182, and the end faces of the driven gears 183 on both sides. The end of the second cam 1712 facing the first fixing part 172 directly abuts against the elastic member 173. This can further simplify the structure of the damping assembly 17, thereby reducing the assembly difficulty and cost of the rotating shaft mechanism.

[0164] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotating shaft mechanism, characterized in that, Includes a base, a rotating assembly, and a damping assembly, wherein: The rotating assembly includes a first rotating arm and a second rotating arm, which are rotatably connected to the two sides of the base, respectively. The first rotating arm has a first cam surface on the side closer to the base, and the second rotating arm has a second cam surface on the side closer to the base. The damping assembly includes a transmission component, a first fixing part, and an elastic component. The transmission component is slidably disposed on the base along a first direction. The transmission component is located between the first rotating arm and the second rotating arm, and its two sides abut against the first cam surface and the second cam surface, respectively. The transmission component can slide along the first direction when the first rotating arm and the second rotating arm rotate. The first fixing part is fixed to the base, and the first fixing part and the transmission component are spaced apart along the first direction. The elastic component is elastically limited between the transmission component and the first fixing part. The transmission component includes a first cam and a second cam. The first cam is located on the side close to the first rotating arm, and one side of the first cam has a third cam surface that abuts against the first cam surface, and the other side has a first inclined surface. The second cam is located on the side close to the second rotating arm, and one side of the second cam has a fourth cam surface that abuts against the second cam surface, and the other side has a second inclined surface. The first cam and the second cam slide towards or away from each other as the first rotating arm and the second rotating arm rotate. The first inclined surface and the second inclined surface are connected in a transmission manner to push at least one of the first cam and the second cam to slide along the first direction. The first direction is the extension direction of the rotation axis of the first rotating arm and the second rotating arm.

2. The rotating shaft mechanism as described in claim 1, characterized in that, The damping assembly further includes a second fixing part, which is fixed to the base and abuts against the side of the transmission member opposite to the first fixing part.

3. The rotating shaft mechanism as described in claim 2, characterized in that, The damping assembly further includes a sliding part, which is slidably disposed on the base along the first direction, and the sliding part abuts against the side of the transmission member facing the first fixed part; One end of the elastic element abuts against the first fixing part, and the other end abuts against the sliding part.

4. The rotating shaft mechanism as described in claim 3, characterized in that, The first inclined surface is located at one end of the first cam near the second fixed part, and the second inclined surface is located at one end of the second cam near the second fixed part; The second fixing part is provided with a first protrusion on the side facing the transmission member, the first protrusion has a third inclined surface on the side facing the first cam, and the first protrusion has a fourth inclined surface on the side facing the second cam; The first inclined plane is parallel to and abuts against the third inclined plane, and the second inclined plane is parallel to and abuts against the fourth inclined plane.

5. The rotating shaft mechanism as described in claim 4, characterized in that, The first cam has a first groove on the side facing the second cam, and the second cam has a first protrusion on the side facing the first cam, with the first protrusion at least partially inserted into the first groove.

6. The rotating shaft mechanism as described in claim 4, characterized in that, The first cam has a second protrusion on the side facing the second cam, and the second cam has a second groove on the side facing the first cam, with the second protrusion at least partially inserted into the second groove.

7. The rotating shaft mechanism as described in any one of claims 3 to 6, characterized in that, The first cam has a fifth inclined surface at one end near the sliding part, and the second cam has a sixth inclined surface at one end near the sliding part; The sliding part has a second protrusion on the side facing the transmission member, the second protrusion has a seventh inclined surface on the side facing the first cam, and the second protrusion has an eighth inclined surface on the side facing the second cam. The fifth inclined plane is parallel to and abuts against the seventh inclined plane, and the sixth inclined plane is parallel to and abuts against the eighth inclined plane.

8. The rotating shaft mechanism as described in any one of claims 3 to 6, characterized in that, The side of the sliding part facing the transmission component is a plane.

9. The rotating shaft mechanism as described in claim 3, characterized in that, The end of the first cam facing the second fixed part abuts against the second fixed part, and the end of the second cam facing the first fixed part abuts against the sliding part; The first inclined plane is parallel to the second inclined plane and abuts against each other.

10. The rotating shaft mechanism as described in claim 2 or 3, characterized in that, The first inclined surface and the second inclined surface are arranged parallel to each other. The first inclined surface is provided with a first rack, and the second inclined surface is provided with a second rack. The transmission component further includes an intermediate gear, which is disposed between the first inclined surface and the second inclined surface, and meshes with the first rack and the second rack respectively.

11. The rotating shaft mechanism according to any one of claims 3 to 6, characterized in that, The damping assembly further includes a guide rod, which is fixed to the base and is arranged along the first direction; The transmission component is sleeved on the guide rod.

12. An electronic device, characterized in that, It includes a first housing, a second housing, a flexible display screen, and a rotating shaft mechanism as described in any one of claims 1 to 11, wherein: The first housing and the second housing are respectively disposed on opposite sides of the rotating shaft mechanism. The first rotating arm is slidably connected to the first housing, and the second rotating arm is slidably connected to the second housing. The flexible display screen continuously covers the first housing, the second housing, and the rotating shaft mechanism, and the flexible display screen is fixedly connected to the first housing and the second housing.

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