Rotating shaft mechanism and electronic equipment

Abstract

The invention provides a rotating shaft mechanism and a rotating shaft mechanism, the rotating shaft mechanism comprises a main shaft assembly and a supporting assembly, the supporting assembly comprises a first supporting piece and a second supporting piece, and the first supporting piece and the second supporting piece can rotate relative to the main shaft assembly. The device further comprises a damping block, a first arc-shaped arm and a second arc-shaped arm. The first arc-shaped arm and the second arc-shaped arm are stacked relative to the main shaft assembly, the damping block is adjacent to the first arc-shaped arm and the second arc-shaped arm, and the adjacent surfaces of the first arc-shaped arm, the second arc-shaped arm and the damping block are provided with a convex surface and a concave surface which are matched with each other. Torque is provided for the first supporting piece and the second supporting piece through cooperation of the arc-shaped arms and the damping blocks, in the specific arrangement process, due to the fact that the arc-shaped arm structures are adopted, the main shaft assembly can be made to be very thin, and when the damping blocks abut against the first arc-shaped arms and the second arc-shaped arms, the first arc-shaped arms and the second arc-shaped arms can obtain large torque; the effect of providing large torque by adopting a thin mechanism is achieved. And the folding effect of the electronic equipment is improved.

Description

[0001] This application is a divisional application. The application number of the original application is 201910806689.X, and the original application date is August 29, 2019. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a rotating shaft mechanism and electronic equipment. Background Art

[0003] With the development of flexible screen technology, the application of flexible screens has gradually increased, but the flexible screen itself is still relatively fragile. It cannot generate a large pulling force during the bending process (to avoid damage), and cannot remain completely flat when flattened. At the same time, the flexible screen will generate huge internal tension during the bending process, which seriously affects the folding feel. Therefore, it is necessary to use a hinge mechanism to provide auxiliary torque. The hinge mechanism of existing electronic devices uses a concave cam structure as a damping component to provide torque. Figure 1 As shown, the damping assembly includes a concave cam structure 2 and two support plates 1 connected to the concave cam structure 2. The two support plates 1 are fixedly connected to the two shells of the electronic device in a one-to-one correspondence. When folding, the two concave cams 3 in the concave cam structure 2 cooperate to provide the auxiliary force required for the shell to fold. Figure 1 In the embodiment, the rotation axis of the concave cam structure 2 coincides with the rotation axis of the product device, which means that if a larger torque is to be obtained, a larger diameter of the concave cam 3 and a larger elastic structure 4 are required to provide pressure for the two concave cams 3. This results in the entire shaft mechanism occupying a larger space, making it impossible to make the foldable product thin and light. Summary of the invention

[0004] The present application provides a hinge mechanism and an electronic device, which are used to improve the folding effect of the electronic device.

[0005] In the first aspect, a hinge mechanism is provided, which is applied to a foldable electronic device, and the electronic device includes two shells, which are respectively connected to the hinge mechanism, and the two shells are unfolded and folded by the hinge mechanism. The hinge mechanism includes a main shaft assembly and a support assembly, wherein the main shaft assembly serves as a support member of the hinge mechanism, and the support assembly includes a first support member and a second support member, wherein the first support member is connected to the first shell of the electronic device, and the second support member is connected to the second shell of the electronic device; in addition, the first support member is connected to the main shaft assembly and can rotate relative to the main shaft assembly; the second support member is connected to the main shaft assembly and can rotate relative to the main shaft assembly. When setting a damping block, the damping block is set on the main shaft assembly, and the damping block and the arc arm are adjacently set along the length direction of the main shaft assembly; wherein the arc arm includes a first arc arm and a second arc arm, and the first arc arm and the second arc arm are stacked relative to the main shaft assembly. When mating, the first arc-shaped arm rotates relative to the main shaft assembly, and the second arc-shaped arm rotates relative to the main shaft assembly; the damping block includes a first end face, the first arc-shaped arm includes a second end face, and the second arc-shaped arm includes a third end face; wherein the first end face is arranged opposite to the second end face, and the first end face is arranged opposite to the third end face. The first end face includes a first convex surface, a first concave surface, and a second concave surface; the second end face includes a second convex surface and a third concave surface; the third end face includes a third convex surface and a fourth concave surface; when the angle between the first shell and the second shell of the electronic device is a first angle, the first convex surface abuts the second convex surface, and the first convex surface abuts the third convex surface; when the first arcuate arm and the second arcuate arm rotate relative to the main shaft assembly so that the angle between the first shell and the second shell of the electronic device is a second angle, the first concave surface abuts the third concave surface, and the second concave surface abuts the fourth concave surface; when the first arcuate arm and the second arcuate arm rotate relative to the main shaft assembly so that the angle between the first shell and the second shell of the electronic device is a third angle, the first concave surface and the third concave surface are gap-matched, the second concave surface and the fourth concave surface are gap-matched, and the first angle is greater than the second angle, and the second angle is greater than the third angle. In the above technical solution, the first support member and the second support member are provided with torque by using the coordination of the arc-shaped arm and the damping block, and in the specific setting, due to the arc-shaped arm structure, the main shaft assembly can be made very thin, and when the damping block abuts against the first arc-shaped arm and the second arc-shaped arm, the first arc-shaped arm and the second arc-shaped arm can obtain a larger torque, thereby achieving the effect of providing a larger torque with a thinner mechanism. The folding effect of the electronic device is improved.

[0006] In a specific implementation scheme, the spindle assembly includes a guide inner shaft and a stacked guide outer shaft, and the arc-shaped slide groove is located between the guide inner shaft and the guide outer shaft. The guide inner shaft and the guide outer shaft cooperate to form an arc-shaped slide groove, which facilitates the assembly of the first support member and the second support member.

[0007] In a specific possible implementation, the two opposite surfaces of the inner guide shaft and the outer guide shaft are coaxial arcuate surfaces, and the two opposite arcuate surfaces enclose the arcuate slide groove. The slide groove is enclosed by the arcuate surfaces.

[0008] In a specific embodiment, the first arc-shaped arm is arranged on the first support member, and the second arc-shaped arm is arranged on the second support member. Alternatively, the first support member includes the first arc-shaped arm, and the second support member includes the second arc-shaped arm. The first arc-shaped arm and the second arc-shaped arm are arranged in different ways.

[0009] In a specific implementation scheme, the first arc-shaped arm is sleeved on the spindle assembly, and the second arc-shaped arm is sleeved on the spindle assembly. Specifically, the first arc-shaped arm and the second arc-shaped arm are sleeved in the arc-shaped slide groove, and the first arc-shaped arm and the second arc-shaped arm are arranged in the spindle assembly to improve the stability of the first arc-shaped arm and the second arc-shaped arm relative to the spindle assembly.

[0010] In a specific possible implementation scheme, the spindle assembly is provided with a first limiting sliding groove, the first support member is connected to the first limiting sliding groove of the spindle assembly, and the first support member rotates relative to the first limiting sliding groove;

[0011] The spindle assembly is provided with a second limiting slot, the second support member is connected to the second limiting slot of the spindle assembly, and the second support member rotates relative to the second limiting slot. The limiting slot limits the rotation distance of the support assembly to prevent the support assembly from being separated from the spindle assembly.

[0012] In a specific possible implementation, the damping block slides along the length direction of the main shaft assembly. The damping block can abut against the arc-shaped arm through the sliding cooperation between the damping block and the main shaft assembly.

[0013] In a specific possible implementation scheme, the spindle assembly is provided with a limit block, and the damping block is provided with a hollow structure cooperating with the limit block, and the limit block is used to limit the sliding distance of the damping block along the length direction of the spindle assembly. The limit block limits the sliding distance of the damping block to prevent the damping block from excessively squeezing the first arc-shaped arm and the second arc-shaped arm.

[0014] In a specific possible implementation, the rotating shaft mechanism further includes an elastic member; the elastic member and the damping block are sequentially arranged along the length direction of the main shaft assembly; when the angle between the first shell and the second shell of the electronic device is a first angle, the elastic deformation of the elastic member is a first deformation; when the angle between the first shell and the second shell of the electronic device is a second angle, the elastic deformation of the elastic member is a second deformation; when the angle between the first shell and the second shell of the electronic device is a third angle, the elastic deformation of the elastic member is a third deformation, the first deformation is greater than the second deformation, and the second deformation is greater than the third deformation. The sliding force of the damping block is provided by the elastic member.

[0015] In a specific implementation scheme, the thickness of the first arc-shaped arm is 1 to 2 times the thickness of the second arc-shaped arm, so that the first arc-shaped arm and the second arc-shaped arm obtain approximately the same torque.

[0016] In a second aspect, a hinge mechanism is provided, which is applied to a foldable electronic device, and the hinge mechanism includes: a main shaft assembly, a support assembly, a damping block, and an elastic member; wherein the main shaft assembly includes a stacked guide inner shaft and a guide outer shaft, and an arc-shaped slide groove is provided between the guide inner shaft and the guide outer shaft, and the axis of the arc-shaped slide groove is parallel to the length direction of the main shaft assembly. The support assembly includes a first support member and a second support member, wherein the first support member is connected to the first shell of the electronic device, and the second support member is connected to the second shell of the electronic device. The arc arm in the present application includes a first arc arm, a second arc arm, a third arc arm, and a fourth arc arm. Among them, the first arc arm and the third arc arm are connected to the first support member, the first arc arm and the third arc arm are located in the arc slide groove, and can rotate around the axis of the arc slide groove; the second arc arm and the fourth arc arm are connected to the second support member, the second arc arm and the fourth arc arm are located in the arc slide groove, and can rotate around the axis of the arc slide groove; the first arc arm and the second arc arm are stacked in the arc slide groove; the damping block is slidably assembled in the arc slide groove and can slide along the length direction of the axis, and the damping block and the stacked first arc arm and second arc arm are adjacent to each other along the length direction of the main shaft assembly; the elastic member and the damping block are adjacent to each other along the length direction of the main shaft assembly, and the elastic member abuts against the damping block. The damping block includes a first end face, the first arc-shaped arm includes a second end face, the second arc-shaped arm includes a third end face, the first end face is arranged opposite to the second end face, and the first end face is arranged opposite to the third end face; the first end face includes a first convex surface, a first concave surface, and a second concave surface; the second end face includes a second convex surface and a third concave surface; the third end face includes a third convex surface and a fourth concave surface; when the angle between the first shell and the second shell of the electronic device is a first angle, the first convex surface abuts the second convex surface, and the first convex surface abuts the third convex surface; the elastic variable of the elastic member is a first deformation variable; when the first arc-shaped arm and the second arc-shaped arm rotate relative to the main shaft assembly, the electric When the angle between the first shell and the second shell of the sub-device is the second angle, the first concave surface abuts against the third concave surface, and the second concave surface abuts against the fourth concave surface; the elastic deformation of the elastic member is the second deformation; when the first arc arm and the second arc arm rotate relative to the main shaft assembly, so that the angle between the first shell and the second shell of the electronic device is the third angle, the first concave surface and the third concave surface are gap matched, and the second concave surface and the fourth concave surface are gap matched; the elastic deformation of the elastic member is the third deformation; wherein the first deformation is greater than the second deformation, and the second deformation is greater than the third deformation; the first angle is greater than the second angle, and the second angle is greater than the third angle. In the above technical solution, by using the arc arm and the damping block to provide torque to the first support member and the second support member, and in the specific setting, due to the arc arm structure, the main shaft assembly can be made very thin, and when the damping block abuts against the first arc arm and the second arc arm, the first arc arm and the second arc arm can obtain a larger torque, so that the effect of using a thinner mechanism to provide a larger torque is achieved. The folding effect of the electronic device is improved.

[0017] In the third aspect, an electronic device is provided, which includes the hinge mechanism described in any one of the above items, and two shells; wherein, the first shell and the second shell, the first shell is connected to the first support member of the hinge mechanism, and the second shell is connected to the second support member of the hinge mechanism. In the above technical solution, an arc-shaped slide groove is provided in the main shaft assembly so that the axis of the arc-shaped slide groove is located outside the main shaft assembly, and when the damping assembly is provided, the first arc-shaped arm and the second arc-shaped arm slide along the arc-shaped slide groove, at this time, the first arc-shaped arm and the second arc-shaped arm rotate around the axis of the arc-shaped slide groove, and when the damping block abuts against the first arc-shaped arm and the second arc-shaped arm, the first arc-shaped arm and the second arc-shaped arm can obtain a larger torque, thereby achieving the effect of providing a larger torque with a thinner mechanism. The folding effect of the electronic device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a rotating shaft mechanism in the prior art.

[0019] Figure 2a A schematic diagram of an expanded electronic device provided in an embodiment of the present application;

[0020] Figure 2b A schematic diagram of a folded state of an electronic device provided in an embodiment of the present application;

[0021] Figure 3 An exploded schematic diagram of the rotating shaft mechanism provided in an embodiment of the present application;

[0022] Figure 4 An exploded schematic diagram of a spindle assembly provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of the guide outer shaft provided in an embodiment of the present application;

[0024] Figure 6 A schematic cross-sectional view of a spindle assembly provided in an embodiment of the present application, perpendicular to its length direction;

[0025] Figure 7 A schematic diagram of the structure of a first support member provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of the structure of a second support member provided in an embodiment of the present application;

[0027] Fig. 9 A schematic diagram of the coordination between the third arc-shaped arm and the fourth arc-shaped arm and the arc-shaped slide groove provided in an embodiment of the present application;

[0028] Fig.10 A schematic diagram of the cooperation between the third arc-shaped arm and the fourth arc-shaped arm and the inner guide shaft provided in an embodiment of the present application;

[0029] Fig.11 A schematic diagram of the coordination between the damping block and the guide outer shaft provided in an embodiment of the present application;

[0030] Fig.12 A schematic diagram of the coordination between the damping block and the inner guide shaft provided in an embodiment of the present application;

[0031] Fig.13 A schematic diagram of the cooperation between the first arc-shaped arm and the second arc-shaped arm and the arc-shaped slide groove provided in an embodiment of the present application;

[0032] Fig.14 A schematic diagram of the structure of a first arc-shaped arm provided in an embodiment of the present application;

[0033] Fig.15 A schematic diagram of the structure of the damping block provided in an embodiment of the present application;

[0034] Fig.16 A schematic diagram of the structure of a second arc-shaped arm provided in an embodiment of the present application;

[0035] Fig.17 A schematic diagram of the coordination between the damping block and the limiting block provided in the embodiment of the present application;

[0036] Fig.18 A state diagram of the first arc-shaped arm and the second arc-shaped arm when the electronic device is folded, provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0038] In order to facilitate the understanding of the hinge mechanism provided in the embodiment of the present application, the following first describes its application scenario. The hinge mechanism is applied to electronic devices, especially electronic devices with bendable screens, such as mobile phones, PDAs, laptop computers or tablet computers. However, no matter which electronic device is used, it includes the following Figure 2a The structure shown in FIG. 1 includes a first housing 200, a hinge mechanism 100, a second housing 300, and a flexible screen 400 fixed on the first housing 200 and the second housing 300. Figure 2a , the hinge mechanism 100 is connected to the first shell 200 and the second shell 300 respectively, and the first shell 200 and the second shell 300 are relatively rotated by the rotation of the hinge mechanism 100, and the flexible screen 400 covers the first shell 200, the second shell 300 and the hinge mechanism 100, and is respectively bonded to the first shell 200 and the second shell 300. When in use, the electronic device has two states: an unfolded state and a folded state. Figure 2aWhen the electronic device is unfolded, the first shell 200 and the second shell 300 are unfolded on both sides of the hinge mechanism 100, and the flexible screen 400 is unfolded. When folding, the first shell 200 and the second shell 300 rotate relative to the hinge mechanism 100, and after folding, they form a Figure 2b In the state shown, the first shell 200 and the second shell 300 are stacked relative to each other, and the flexible screen (not shown in the figure) is bent along with the first shell 200 and the second shell 300. Figure 2b The folding method shown in FIG. 1 is that the flexible screen is located inside the electronic device, but the electronic device provided in the embodiment of the present application is not limited to Figure 2b The folding method shown in the figure can also be folded in a way that the flexible screen is exposed after folding. To facilitate understanding of the hinge mechanism provided in the embodiment of the present application, its structure is described in detail below in conjunction with the accompanying drawings.

[0039] First reference Figure 3 , Figure 3 The schematic diagram of the decomposition of the rotating shaft mechanism provided in the embodiment of the present application is shown. The rotating shaft mechanism provided in the embodiment of the present application includes a main shaft assembly and a support assembly; wherein the support assembly includes a first support member 20 connected to the first shell, and a second support member 30 connected to the second shell. When the first shell is connected to the first support member 20, it can be directly connected or indirectly connected through other structural members; similarly, when the second shell is connected to the second support member 30, it can be directly connected or indirectly connected through other structural members. In the specific setting, the first support member 20 and the second support member 30 are arranged on both sides of the main shaft assembly, the first support member 20 can rotate relative to the main shaft assembly, and the second support member 30 can rotate relative to the main shaft assembly. When the electronic device is unfolded or folded, the first shell drives the first support member 20 to rotate relative to the main shaft assembly, and the second shell drives the second support member 30 to rotate relative to the main shaft assembly, and the stability of the first shell and the second shell is supported by the first support member 20 and the second support member 30. In the embodiment of the present application, the number of support assemblies is not limited, and two, three, or other different numbers of support assemblies can be used to rotatably connect with the spindle assembly, as long as the first shell and the second shell can rotate stably. The following takes one support assembly as an example to illustrate the matching relationship between the support assembly and the spindle assembly.

[0040] For reference Figure 4 and Figure 5 ,in, Figure 4 shows an exploded schematic diagram of the spindle assembly, Figure 5The schematic diagram of the structure of the guide outer shaft is shown. The spindle assembly provided in the embodiment of the present application may include a guide inner shaft 50 and a guide outer shaft 10. The guide inner shaft 50 and the guide outer shaft 10 may be two structural members with the same length direction. The guide inner shaft 50 and the guide outer shaft 10 may also be two structural members with different length directions. This is only a specific example in the embodiment of the present application. In the embodiment of the present application, the length direction of the spindle assembly is the length direction of the guide inner shaft 50 and / or the guide outer shaft 10. Continue to refer to Figure 4 and Figure 5 The guide inner shaft 50 and the guide outer shaft 10 are stacked and arranged, and the guide inner shaft 50 and the guide outer shaft 10 have two opposite surfaces. For the convenience of description, the side of the guide inner shaft 50 facing the guide outer shaft 10 is named as the first surface 51, and the side of the guide outer shaft 10 facing the guide inner shaft 50 is named as the second surface 11. The first surface 51 and the second surface 11 are coaxial arc surfaces. Figure 4 The first surface 51 is provided with a boss 52. When the guide inner shaft 50 and the guide outer shaft 10 are stacked, the guide outer shaft 10 abuts against the boss 52 and is fixedly connected to the guide inner shaft 50 through a threaded connector (bolt or screw). Figure 6 As shown, Figure 6 The schematic diagram of the cross section of the main shaft assembly perpendicular to its length direction. When the guide inner shaft 50 and the guide outer shaft 10 are connected to form the main shaft assembly, there is a gap between the first surface 51 and the second surface 11. The gap is an arc-shaped slide groove 60, and the axis of the arc-shaped slide groove 60 is parallel to the length direction of the main shaft assembly. Figure 6 , the first surface 51 and the second surface 11 are coaxial arc surfaces, wherein the axis is the axis of the cylindrical surface where the two arc surfaces are located, such as Figure 6 In the figure, the two dotted lines represent the cylindrical surfaces where the first surface 51 and the second surface 11 are located, and the point O indicates the axis of the cylindrical surface. Figure 6 is a cross-sectional view, so the cylindrical surface is Figure 6 The axis is shown as a point only.

[0041] The first support member 20 can be connected to the spindle assembly. Figure 7 , Figure 7 2 shows a schematic structural diagram of the first support member, the first support member 20 includes a first support plate 21 and a third arc-shaped arm 22, and the third arc-shaped arm 22 can be fixedly connected to the first support plate 21. Figure 7A third arc-shaped arm 22 is shown in the figure, but the number of arc-shaped arms provided in the embodiment of the present application can be different, such as two, three, four, etc., at least two or more third arc-shaped arms 22, which can be set as needed in the specific setting. However, no matter how many third arc-shaped arms 22 are used, the arrangement direction of the third arc-shaped arms 22 is arranged along the length of the guide inner shaft. Fig. 9 , Fig. 9 Schematic diagram of the cooperation between the third arc-shaped arm and the arc-shaped slot is shown. When the first support member 20 is connected to the spindle assembly, the third arc-shaped arm 22 is inserted into the arc-shaped slot 60 and can rotate around the axis of the arc-shaped slot 60, such as Fig. 9 As shown in Fig. 9 As shown in the arrow, the third arc-shaped arm 33 can rotate around the axis of the arc-shaped slide groove 60. When the third arc-shaped arm 22 rotates around the axis of the arc-shaped slide groove 60, the third arc-shaped arm 22 slides in the arc-shaped slide groove 60, and the first support member 20 rotates relative to the main shaft assembly. Figure 6 When the third arc-shaped arm 22 is specifically set, the thickness of the third arc-shaped arm 22 matches the depth of the arc-shaped slide groove 60, so that the third arc-shaped arm 22 is limited by the first surface 51 and the second surface 11, ensuring that the third arc-shaped arm 22 can slide along the arc-shaped slide groove 60. Figure 4 and Figure 7 When the first support member 20 rotates relative to the main shaft assembly, the first support member 20 can rotate relative to the main shaft assembly to an angle greater than ninety degrees, so the length of the third arc-shaped arm 22 needs to meet the following requirements: when the electronic device rotates from the unfolded state to the folded state, the third arc-shaped arm 22 is still partially located in the arc-shaped slide groove 60. In order to prevent the third arc-shaped arm 22 from completely sliding out of the arc-shaped slide groove 60, the main shaft assembly is provided with a first limiting slide groove 53, and the first support member 20 is connected to the first limiting slide groove 53 of the main shaft assembly, and the first support member 20 rotates relative to the first limiting slide groove 53. Figure 4 and Figure 7 As shown, when the third arc-shaped arm 22 is set, a first limiting boss 221 is set on the side of the third arc-shaped arm 22 facing the first surface 51, and at the same time, a first limiting groove 53 corresponding to the first limiting boss 221 is set on the first surface 51. When the rotating shaft mechanism rotates to a folded state, the first limiting boss 221 abuts against the groove wall of the first limiting groove 53, preventing the third arc-shaped arm 22 from continuing to rotate, thereby ensuring that the third arc-shaped arm 22 will not completely slide out of the arc-shaped groove 60.

[0042] The second support member 30 can be connected to the spindle assembly. Figure 8 , Figure 8 3 shows a schematic diagram of the structure of the second support member, the second support member 30 includes a first support plate 31 and a fourth arc-shaped arm 32, and the fourth arc-shaped arm 32 can be fixedly connected to the first support plate 31. Figure 8 A fourth arc-shaped arm 32 is shown in the figure, but the number of arc-shaped arms provided in the embodiment of the present application can be different numbers, such as two, three, four, or more than two fourth arc-shaped arms 32, which can be set as needed in the specific setting. However, no matter how many fourth arc-shaped arms 32 are used, the arrangement direction of the fourth arc-shaped arms 32 is arranged along the length of the guide inner shaft 50. When the second support member 30 is connected to the main shaft assembly, the fourth arc-shaped arm 32 is inserted into the arc-shaped slide groove 60 and can rotate around the axis of the arc-shaped slide groove 60. When the fourth arc-shaped arm 32 rotates around the axis of the arc-shaped slide groove 60, the fourth arc-shaped arm 32 slides in the arc-shaped slide groove 60, and the second support member 30 rotates relative to the main shaft assembly. The specific assembly condition can refer to the matching condition between the third arc-shaped arm 22 and the arc-shaped slide groove 60. When the fourth arc-shaped arm 32 is specifically set, the thickness of the fourth arc-shaped arm 32 matches the height of the arc-shaped slide groove 60, so that the fourth arc-shaped arm 32 is limited by the first surface 51 and the second surface 11, ensuring that the fourth arc-shaped arm 32 can slide along the arc-shaped slide groove 60. Figure 8 and Fig. 9 When the second support member 30 rotates relative to the main shaft assembly, the second support member 30 can rotate relative to the main shaft assembly to an angle greater than ninety degrees. Therefore, the length of the fourth arc-shaped arm 32 needs to meet the following requirements: when the electronic device rotates from the unfolded state to the folded state, the fourth arc-shaped arm 32 is still partially located in the arc-shaped slide groove 60. In order to prevent the fourth arc-shaped arm 32 from completely sliding out of the arc-shaped slide groove 60, the main shaft assembly is provided with a second limiting slide groove, the second support member 30 is connected to the second limiting slide groove of the main shaft assembly, and the second support member 30 rotates relative to the second limiting slide groove 53. Figure 4 and Figure 7 As shown, when the fourth arc-shaped arm 32 is set, a second limiting boss (not shown in the figure) is set on the side of the fourth arc-shaped arm 32 facing the first surface 51, and at the same time, a second limiting groove (not shown in the figure) corresponding to the second limiting boss is set on the first surface 51. When the electronic device is rotated to a folded state, the second limiting boss abuts against the groove wall of the second limiting groove, preventing the fourth arc-shaped arm 32 from continuing to rotate, thereby ensuring that the fourth arc-shaped arm 32 will not completely slide out of the arc-shaped groove 60.

[0043] For reference Fig.10 , Fig.10 The diagram shows the cooperation between the third arc-shaped arm and the fourth arc-shaped arm and the inner guide shaft. During assembly, the first support plate 21 and the second support plate 31 are arranged on both sides of the outer guide shaft 10, and the third arc-shaped arm 22 and the fourth arc-shaped arm 32 are attached to the first surface 51 of the inner guide shaft 50. Fig.10The third arc-shaped arm 22 and the fourth arc-shaped arm 32 are arranged along the length direction of the spindle assembly, and there is a boss 52 between the third arc-shaped arm 22 and the fourth arc-shaped arm 32. The boss 52 can limit the movement of the third arc-shaped arm 22 along the length direction of the spindle assembly to ensure the stability of the movement of the first support member 20. Fig.10 Only one third arc arm 22 and one fourth arc arm 32 are shown in the figure. When there are multiple third arc arms 22 and multiple fourth arc arms 32, multiple third arc arms 22 and multiple fourth arc arms 32 are arranged along the length direction of the main shaft assembly. The third arc arm 22 and the fourth arc arm 32 can be arranged in a staggered manner, such as: the third arc arm 22, the fourth arc arm 32, the third arc arm 22, the fourth arc arm 32...; or the third arc arm 22, the fourth arc arm 32, the fourth arc arm 32, the third arc arm 22... can also be arranged in an arrangement manner. The specific arrangement manner is not limited in the embodiment of the present application. After the third arc arm 22 and the fourth arc arm 32 are assembled, the guide outer shaft 10 is fixedly connected to the guide inner shaft 50, so that the third arc arm 22 and the fourth arc arm 32 are located in the arc groove surrounded by the guide inner shaft 50 and the guide outer shaft 10.

[0044] For reference Figure 3 and Fig.10 The shaft mechanism provided in the embodiment of the present application further includes a damping assembly 40, which includes a damping block 43, an elastic member 44, a first arc-shaped arm 42, and a second arc-shaped arm 41. Figure 7 As shown, the first arc-shaped arm 42 is fixedly connected to the first support plate 21, or the first arc-shaped arm 42 and the first support plate 21 are an integral structure, and the first arc-shaped arm 42 and the third arc-shaped arm 22 are arranged along the length direction of the spindle assembly. Figure 8 As shown, the second arc arm 41 is fixedly connected to the second support plate 31, or the second arc arm 41 and the second support plate 31 are an integral structure, and the second arc arm 41 and the fourth arc arm 32 can be arranged along the length direction of the spindle assembly. When connected to the spindle assembly, the first arc arm 42 is sleeved on the spindle assembly, and the second arc arm 41 is sleeved on the spindle assembly. Specifically, the first arc arm 42 and the second arc arm 41 can be stacked relative to the spindle assembly and located in the arc chute. Fig.10 and Fig.15 The damping block 43 is slidably assembled in the main shaft assembly. When the damping block 43 is slidably assembled with the main shaft assembly, the damping block 43 has two opposite arcuate surfaces 433 and 434, one of which is in contact with the first surface 51 of the guide inner shaft 50. Fig.11 and Fig.15 As shown, Fig.11 FIG. 4 is a schematic diagram of the coordination between the damping block and the guide outer shaft. Another arc surface 434 of the damping block 43 is attached to the second surface 11 of the guide outer shaft 10. Fig.10 When assembling the damping block 43, the damping block 43 and the first arc-shaped arm 42 are adjacently arranged along the length direction of the main shaft assembly, and the damping block 43 is also adjacently arranged along the length direction of the main shaft assembly. The damping block 43 abuts against the first arc-shaped arm 42, and the damping block 43 abuts against the second arc-shaped arm 41. The elastic member 44 is used to push the damping block 43 to abut against the first arc-shaped arm 42 and the second arc-shaped arm 41 to provide torque for the rotation of the first support member and the second support member.

[0045] For reference Figure 4 and Figure 5 , a fixing column 54 with a threaded hole is provided on the first surface 51 of the guide inner shaft 50, and a limiting block 12 is provided on the guide outer shaft 10, and a through hole (not shown) matching with the fixing column 54 is provided on the limiting block 12. When the guide inner shaft 50 and the guide outer shaft 10 are assembled, the fixing column 54 is inserted into the through hole of the limiting block 12. When the guide inner shaft 50 and the guide outer shaft 10 are connected, bolts or screws are passed through the guide outer shaft 10 and screwed into the fixing column 54 to fix the guide outer shaft 10 and the guide inner shaft 50. Fig.10 and Fig.11 The damping block 43 is sleeved on the limit block 12. Specifically, a hollow structure 431 is provided on the damping block 43. The limit block 12 is inserted into the hollow structure 431. The size of the hollow structure 431 in the length direction of the spindle assembly is larger than the size of the limit block 12 in the length direction of the spindle assembly. At the same time, the size of the hollow structure 431 in the direction perpendicular to the length of the spindle assembly matches the size of the limit block in the direction perpendicular to the length of the spindle assembly. Therefore, the damping block 43 can be limited to slide along the length direction of the spindle by the limit block 12. At the same time, the limit block 12 can serve as a limit structure for the sliding of the damping block 43. When the damping block 43 slides in the arc-shaped slide groove, the damping block 43 can slide along the length direction of the spindle assembly through the cooperation of the hollow structure 431 and the limit block 12, and the maximum sliding stroke of the damping block 43 is limited by the side wall of the limit block 12 in the length direction of the spindle abutting against the damping block 43.

[0046] For reference Figure 4 and Fig.12 , a limiting protrusion 56 is provided on the inner guide shaft 50, and when the damping block 43 is assembled on the inner guide shaft 50, a gap for accommodating the first arc arm and the second arc arm is formed between the limiting protrusion 56 and the damping block 43. When the first arc arm and the second arc arm are assembled, the first arc arm and the second arc arm are assembled between the limiting protrusion 56 and the damping block 43, and the axial movement range of the first arc arm and the second arc arm is limited by the limiting protrusion 56, and the sliding distance of the damping block 43 is limited by the limiting block, so as to prevent the damping block 43 from exerting pressure on the first arc arm and the second arc arm when the electronic device is folded, causing the support member (the first support member and the second support member) to tilt or fall out.

[0047] For reference Figure 4 , Fig.10 and Fig.11 , the guide inner shaft 50 is provided with a groove 55 that cooperates with the elastic member 44, the elastic member 44 is arranged in the groove 55, and the groove 55 limits the deformation of the elastic member 44 along the length direction of the main shaft assembly. The elastic member 44 provided in the embodiment of the present application can be a compression spring, and the number of compression springs can be two, but the number of the elastic member 44 provided in the embodiment of the present application is not limited to two, and different numbers such as one, three, and four can also be used. When the elastic member 44 is assembled in the main shaft assembly, the elastic member 44 and the damping block 43 are arranged adjacent to each other along the length direction of the main shaft assembly, and the elastic member 44 abuts against the damping block 43. During specific assembly, the first end of the elastic member 44 can abut against the main shaft assembly, and the first end of the elastic member 44 can also abut against a structural member, which can be arranged in the main shaft assembly, and the second end of the elastic member 44 can abut against the damping block 43.

[0048] Continue to refer Fig.10 When the damping assembly 40 is in use, the damping block 43 abuts against the first arc-shaped arm 42 and the second arc-shaped arm 41, and the damping block 43 has opposing surfaces with the first arc-shaped arm 42 and the second arc-shaped arm 41. The following describes in detail the cooperation between the damping block 43 and the first arc-shaped arm 42 and the second arc-shaped arm 41 in conjunction with the accompanying drawings.

[0049] For reference Fig.13 , Fig.13 The first arc arm 42 and the second arc arm 41 provided in the embodiment of the present application can rotate around the axis of the arc chute respectively. When rotating, the first arc arm 42 and the second arc arm 41 can slide in the arc chute 60. When the first arc arm 42 and the second arc arm 41 are assembled in the arc chute 60, the first arc arm 42 and the second arc arm 41 are stacked, and the first arc arm 42 is located below the second arc arm 41 (with the first arc arm 42 being located below the second arc arm 41). Fig.13 The placement direction of the spindle assembly is the reference direction).

[0050] For reference Fig.14 , Fig.14The schematic diagram of the structure of the first arc-shaped arm is shown. The first arc-shaped arm 42 can be arranged on the first support member, or it can be a part of the structure of the first support member. In this case, the first support member includes the first arc-shaped arm 42. Taking the first arc-shaped arm 42 belonging to the first support member as an example, the first arc-shaped arm 42 has a first arm 423 and a second arm 422 arranged along the length direction of the main shaft assembly. The thickness of the first arm 423 is less than the thickness of the second arm 422, thereby forming a step structure (not shown in the figure) between the first arm 423 and the second arm 422; wherein the second arm 422 has a second end face 421 facing the damping block. For reference Fig.16 , Fig.16 The schematic diagram of the structure of the second arc-shaped arm is shown. The second arc-shaped arm 41 can be arranged on the first support member, or it can be a part of the structure of the second support member. In this case, the second support member includes the second arc-shaped arm 41. Taking the second arc-shaped arm 41 belonging to the second support member as an example, the second arc-shaped arm 41 has a third arm 413 and a fourth arm 412 arranged along the length direction of the spindle assembly. The thickness of the third arm 413 is greater than the thickness of the fourth arm 412, so that a step structure is formed between the third arm 413 and the fourth arm 412; wherein the fourth arm 412 has a third end face 411 facing the damping block. When the first arc arm 42 and the second arc arm 41 are assembled in the arc slide groove, the first arm 423 is stacked with the third arm 413, and the second arm 422 is stacked with the fourth arm 412. The step structure of the first arc arm 42 abuts against the step structure of the second arc arm 41, thereby limiting the axial movement of the second arm 422 and the fourth arm 412, so that the second end face 421 and the third end face 411 can be in good contact with the damping block.

[0051] Continue to refer Fig.14 The second arm 422 has a second end surface 421 facing the damping block, and the second end surface 421 includes a second convex surface 421b and a third concave surface 421a connected to the second convex surface 421b, wherein the third concave surface 421a is disposed at an end of the first arc-shaped arm 42 away from the first support plate. Fig.15 , Fig.15 The schematic diagram of the structure of the damping block is shown. The damping block 43 is provided with a first end surface 432 opposite to the second end surface 421. The first end surface 432 includes a first convex surface 432b and a first concave surface 432a connected to the first convex surface 432b.

[0052] Continue to refer Fig.16 The fourth arm 412 has a third end surface 411 facing the damping block, and the third end surface 411 includes a third convex surface 411b and a fourth concave surface 411a connected to the third convex surface 411b. The fourth concave surface 411a is arranged at an end of the second arc-shaped arm 41 away from the second support plate. Fig.15The first end surface 432 further includes a second concave surface 432c connected to the first convex surface 432b, and the fourth concave surface 411a matches the second concave surface 432c. When the electronic device is in the unfolded state, the third convex surface 411b of the fourth arc-shaped arm 41 abuts against the first convex surface 432b.

[0053] To facilitate understanding of the cooperation between the first arc-shaped arm, the second arc-shaped arm and the damping block provided in the embodiment of the present application, the following is explained in conjunction with the motion state of the electronic device. When the electronic device changes from the unfolded state to the folded state, the first support member and the second support member are driven to rotate relative to the main shaft assembly. For the convenience of description, three angles of the electronic device when folded are first defined: the first angle, the second angle, the third angle and the fourth angle. Among them, the first angle is greater than the fourth angle, the fourth angle is greater than the second angle, and the second angle is greater than the third angle. For example, the first angle is about 180 degrees, that is, the first shell and the second shell are in an unfolded state; the third angle is about 0 degrees, that is, the first shell and the second shell are in a folded state; and the second angle and the fourth angle can be angles between 0 and 180 degrees, such as 30°, 45°, 60° and other different angles, that is, the second angle and the fourth angle correspond to the first shell and the second shell being located between the folded state and the unfolded state. The above-mentioned first angle, second angle, third angle and fourth angle also correspond to the relative angles of the first support member and the second support member.

[0054] When the angle between the first shell and the second shell of the electronic device is a first angle, at this time, the first shell and the second shell are flattened, and the state of the first arc-shaped arm and the second arc-shaped arm is as follows: Fig.10 As shown in. Fig.14 , Fig.15 and Fig.16 As shown, the first convex surface 432b abuts against the second convex surface 421b, and the first convex surface 432b abuts against the third convex surface 411b. At this time, the elastic member is in a compressed state, and the elastic deformation of the elastic member is the first deformation.

[0055] When the first shell and the second shell of the electronic device begin to rotate relative to each other, the angle between the first shell and the second shell is the fourth angle. At this time, when the first arc-shaped arm 42 and the second arc-shaped arm 41 rotate relative to the main shaft assembly, the first support plate 21 drives the third arc-shaped arm 42 to rotate, and the second support plate 31 drives the second arc-shaped arm 41 to rotate. At the same time, the second convex surface 421b slides relative to the first convex surface 432b, and the second convex surface 421b partially abuts against the first convex surface 432b; the third convex surface 411b slides relative to the first convex surface 432b, and the third convex surface 411b partially abuts against the first convex surface 432b. At this time, the elastic deformation of the elastic member is still the first deformation.

[0056] When the angle between the first shell and the second shell of the electronic device is the second angle, the damping block 43 slides toward the first arc-shaped arm 42 and the second arc-shaped arm 41 under the push of the elastic member, the second convex surface 421b is disengaged from the first convex surface, the third convex surface 411b is disengaged from the first convex surface 432b, and the first concave surface 432a abuts against the third concave surface 421a, and the second concave surface 432c abuts against the fourth concave surface 411a. At this time, the elastic deformation of the elastic member is the second deformation (the first deformation is greater than the second deformation), and the first concave surface 432a pushes the third concave surface 421a through the second deformation of the elastic member, and the first concave surface 432a provides the third concave surface 421a with a force to help the first arc-shaped arm 42 rotate. At the same time, the fourth concave surface 411a pushes the second concave surface 432c, and the fourth concave surface 411a pushes the second concave surface 432c to provide a force to help the second arc-shaped arm 41 rotate. To facilitate understanding of the forces acting on the first arc-shaped arm 42 and the second arc-shaped arm 41 , the forces acting on the first arc-shaped arm are described as an example.

[0057] like Fig.14 As shown, since the third concave surface 421a and the length direction of the main shaft assembly form a certain angle, two component forces will be generated on the third concave surface 421a respectively, and the force F received by the third concave surface 421a is F1+F2, wherein F1 is the component force perpendicular to the length direction of the main shaft, and F2 is the component force parallel to the length direction of the main shaft assembly. When the first support member rotates, the component force F1 perpendicular to the length direction of the main shaft assembly can be used as an auxiliary force to assist the first support member to rotate, thereby pushing the first support member to rotate. When the angle between the first shell and the second shell of the electronic device is the second angle, such as when the angle between the first shell and the second shell is 30°, the fourth concave surface 411a contacts the second concave surface 432c, and under the push of the elastic member, the damping block 43 is pushed to slide toward the first arc-shaped arm 42, and the first concave surface 432a pushes the third concave surface 421a, thereby pushing the first arc-shaped arm 42 to rotate.

[0058] When the first arc-shaped arm 42 and the second arc-shaped arm 41 rotate relative to the main shaft assembly so that the angle between the first shell and the second shell of the electronic device is a third angle, the electronic device is in a folded state. Fig.18 As shown, the elastic member has a third deformation amount (the second deformation amount is greater than the third deformation amount). Under the action of the elastic member, the damping block 43 abuts against the limit block, thereby limiting the sliding position of the damping block 43, so that the first concave surface 432a and the third concave surface 421a are gap-fitted. Similarly, the second concave surface 432c and the fourth concave surface 411a are gap-fitted, thereby preventing the damping block 43 from still applying force to the first arc-shaped arm 42 and the second arc-shaped arm 41 when the electronic device is folded.

[0059] From the above description, it can be seen that the cooperation between the several convex surfaces and concave surfaces can provide the first support member and the second support member with the force required for rotation, thereby helping the user to overcome the tension generated by the flexible screen when the electronic device is folded, making it easier for the user to fold. The cooperation of the slope surface can facilitate the electronic device to remain in the folded state after folding.

[0060] The damping assembly provided in the embodiment of the present application provides the torque required for the first shell and the second shell to rotate through the cooperation of the damping block with the first arc-shaped arm and the second arc-shaped arm. Fig.13 As shown, the torque on the first arc-shaped arm 42 is: T1 = r*F1 (T1 is the torque on the first arc-shaped arm 42, r is the radius corresponding to the first arc-shaped arm 42, and F3 is the friction force on the first arc-shaped arm 42); the torque on the second arc-shaped arm 41 is: T2 = r*F3 (T2 is the torque on the second arc-shaped arm 41, r is the radius corresponding to the second arc-shaped arm 41, and F3 is the vertical component force on the fourth concave surface of the second arc-shaped arm 41); Fig.13 It can be seen that the axis (point O) around which the first arc arm 42 and the second arc arm 41 rotate is located outside the main shaft assembly, and the sizes of r and R are much larger than the thickness of the main shaft assembly. Therefore, when the first arc arm 42 and the second arc arm 41 rotate, they can be subjected to a larger torque. Figure 1 Compared with the concave cam structure in the prior art shown in the figure, a greater torque can be provided. When the above structure is adopted, the thickness of the main shaft assembly only needs to meet the thickness of the arc-shaped slide groove, and there is no need to provide a whole annular slideway. Therefore, the shaft mechanism provided in the embodiment of the present application can provide a greater torque while having a thickness less than Figure 1 Thickness of the hinge mechanism shown.

[0061] Continue to refer Fig.13 Since the second arc-shaped arm 41 is located above the first arc-shaped arm 42 (with Fig.13The placement direction of the spindle assembly shown is the reference direction), so the radius R corresponding to the second arc arm 41 is larger than the radius r corresponding to the first arc arm 42. When the damping effect is applied, it is provided by the friction force applied to the first arc arm and the second arc arm. The friction force satisfies the following formula: F = μ × Fn, where F is the friction force, μ is the friction coefficient, and Fn is the pressure. When the first arc arm 42 and the second arc arm 41 are made of the same material, the friction coefficients of the two are approximately the same. When the damping block 43 contacts the first arc arm 42 and the second arc arm 41, the contact area between the first arc arm 42 and the damping block 43 is larger than the contact area between the second arc arm 41 and the damping block 43, and the pressure applied by the damping block 43 to the first arc arm 42 will be greater than the pressure applied by the damping block 43 to the second arc arm 41. Therefore, in order to make the damping effect of the first arc arm 42 and the second arc arm 41 approximately equal, when setting the first arc arm 42 and the second arc arm 41, the thickness of the first arc arm 42 is greater than the thickness of the second arc arm 41, wherein the thickness of the first arc arm 42 refers to the width D of the second end face 421, and the thickness of the second arc arm 41 refers to the width d of the third end face 411, and D>d. For example, the width of the second end face 421 is 1 to 2 times the width of the third end face 411. Fig.13 In the embodiment, the width of the second end face 421 is twice the width of the second surface 11. Of course, the width of the second end face 421 can be the same as the width of the third end face 411, and other width ratios can be adopted, as long as the damping effects on the second support member 30 and the first support member 20 are approximately equal.

[0062] In addition to the above-mentioned limitation on the width of the second end face 421 and the third end face 411, when setting the third concave surface 421a and the fourth concave surface 411a, the slope of the third concave surface 421a is greater than the slope of the fourth concave surface 411a, so that when the third concave surface 421a cooperates with the first concave surface 432a and the fourth concave surface 411a cooperates with the second concave surface 432c, approximately equal driving forces can be provided to the first support member 20 and the second support member 30, so that the first support member 20 and the second support member 30 can rotate synchronously.

[0063] When setting the third concave surface and the first concave surface, the following method can be used: Fig.14 and Fig.16 In the manner shown, two third concave surfaces 421a may be provided on the first arc-shaped arm 42, and two fourth concave surfaces 411a may be provided on the second arc-shaped arm 41. In this case, there are also two first concave surfaces 432a and two second concave surfaces 432c on the corresponding damping block 43. In this case, the damping block 43 will provide auxiliary force when the electronic device is unfolded and folded through the cooperation of the slope surface, and can provide a flattening retention force when unfolded.

[0064] like Fig.17As shown, when the damping block 43 slides to the set position, the limit block 12 abuts against the damping block 43 and limits the stroke of the damping block 43, thereby preventing the damping block 43 from applying excessive force to the first arc arm 42 and the second arc arm 41, preventing the first support member 20 and the second support member 30 from being tilted due to force and causing jamming or blocking in the initial stage of the electronic device's deployment process, thereby improving the use effect of the electronic device.

[0065] like Fig.18 As shown, when the electronic device is in a folded state, the first arc arm 42 and the second arc arm 41 are out of contact. In order to facilitate the stacking of the first arc arm 42 and the second arc arm 41 during the unfolding of the electronic device, matching slope surfaces (not shown in the figure) are respectively provided at the ends of the first arc arm 42 and the second arc arm 41, and guidance can be provided through the slope surfaces.

[0066] In order to facilitate the first arc arm and the second arc arm to disengage from the main shaft assembly, a limiting boss can be set in the third arc arm and the fourth arc arm to prevent the first arc arm and the second arc arm from disengaging from the arc slide groove. The specific structure can refer to the above description and will not be described in detail here.

[0067] The present application also provides an electronic device, such as a mobile phone, a PDA, a laptop computer or a tablet computer. However, no matter which electronic device is used, it includes the following Figure 2a The structure shown in FIG. 1 includes a first housing 200, a hinge mechanism 100, a second housing 300, and a flexible screen 400 fixed on the first housing 200 and the second housing 300. Figure 2a , the hinge mechanism 100 is connected to the first shell 200 and the second shell 300 respectively, and the first shell 200 and the second shell 300 are relatively rotated by the rotation of the hinge mechanism 100, and the flexible screen 400 covers the first shell 200, the second shell 300 and the hinge mechanism 100, and is respectively bonded to the first shell 200 and the second shell 300. When in use, the electronic device has two states: an unfolded state and a folded state. Figure 2a When the electronic device is unfolded, the first shell 200 and the second shell 300 are unfolded on both sides of the hinge mechanism 100, and the flexible screen 400 is unfolded. When folding, the first shell 200 and the second shell 300 rotate relative to the hinge mechanism 100, and after folding, they form a Figure 2b In the state shown, the first shell 200 and the second shell 300 are stacked relative to each other, and the flexible screen (not shown in the figure) is bent along with the first shell 200 and the second shell 300. Figure 2b The folding method shown in FIG. 1 is that the flexible screen is located inside the electronic device, but the electronic device provided in the embodiment of the present application is not limited to Figure 2bThe folding method shown in the figure can also be folded in a way that the flexible screen is exposed after folding. When the above-mentioned hinge mechanism 100 is used, an arc-shaped slide groove is set in the main shaft assembly so that the axis of the arc-shaped slide groove is located outside the main shaft assembly, and when the damping assembly is set, the first arc-shaped arm and the second arc-shaped arm slide along the arc-shaped slide groove. At this time, the first arc-shaped arm and the second arc-shaped arm rotate around the axis of the arc-shaped slide groove. When the damping block abuts against the first arc-shaped arm and the second arc-shaped arm, the first arc-shaped arm and the second arc-shaped arm can obtain a larger torque, thereby achieving the effect of using a thinner mechanism to provide a larger torque. The folding effect of the electronic device is improved.

[0068] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A hinge mechanism, applied to a foldable electronic device, characterized in that: The rotating shaft mechanism comprises: a main shaft assembly, a damping block, an arc-shaped arm, and an elastic member; The elastic member, the damping block, and the arc-shaped arm are sequentially arranged on the spindle assembly along the length direction of the spindle assembly; the arc-shaped arm includes a first arc-shaped arm and a second arc-shaped arm; the first arc-shaped arm rotates relative to the spindle assembly, and the second arc-shaped arm rotates relative to the spindle assembly; The damping block includes a first end surface, the first arc-shaped arm includes a second end surface, the second arc-shaped arm includes a third end surface, the first end surface is arranged opposite to the second end surface, and the first end surface is arranged opposite to the third end surface; The first end surface, the second end surface, and the third end surface are all cam surfaces; When the opening and closing angle of the electronic device is a first angle, the first end face abuts against the second end face, the first end face abuts against the third end face, and the elastic deformation amount of the elastic member is a first deformation amount; When the opening and closing angle of the electronic device is a second angle, the matching relationship between the first end face and the second end face, and the matching relationship between the first end face and the third end face are changed, and the elastic deformation amount of the elastic member is a second deformation amount; The first angle is different from the second angle, and the first deformation amount is different from the second deformation amount.

2. The rotating shaft mechanism according to claim 1, characterized in that: The first end surface of the damping block includes a first convex surface, a first concave surface, and a second concave surface; The second end surface of the first arc-shaped arm includes a second convex surface and a third concave surface; The third end surface of the second arc-shaped arm includes a third convex surface and a fourth concave surface, When the opening and closing angle of the electronic device is a first angle, the first convex surface abuts against the second convex surface, and the first convex surface abuts against the third convex surface.

3. The rotating shaft mechanism according to claim 2, characterized in that: When the opening and closing angle of the electronic device is a second angle, the first concave surface abuts against the third concave surface, and the second concave surface abuts against the fourth concave surface.

4. The method according to claim 3, characterized in that When the opening and closing angle of the electronic device is a third angle, the first concave surface and the third concave surface are gap-matched, the second concave surface and the fourth concave surface are gap-matched, and the third angle is different from the first angle and the second angle.

5. The rotating shaft mechanism according to claim 4, characterized in that: When the opening and closing angle of the electronic device is a third angle, the elastic deformation amount of the elastic member is a third deformation amount, and the third deformation amount is different from both the first deformation amount and the second deformation amount.

6. The rotating shaft mechanism according to claim 5, characterized in that: The first deformation amount is greater than the second deformation amount, and the second deformation amount is greater than the third deformation amount.

7. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The rotating shaft mechanism comprises a first supporting member and a second supporting member. The first support member is connected to the spindle assembly, and the first support member rotates relative to the spindle assembly; The second support member is connected to the spindle assembly, and the second support member rotates relative to the spindle assembly; The first arc-shaped arm is disposed on the first supporting member, and the second arc-shaped arm is disposed on the second supporting member.

8. The rotating shaft mechanism according to any one of claims 1 to 7, characterized in that: The first arc-shaped arm is sleeved on the main shaft assembly, and the second arc-shaped arm is sleeved on the main shaft assembly.

9. The rotating shaft mechanism according to claim 8, characterized in that: The spindle assembly is provided with a first limiting sliding groove, the first supporting member is connected to the first limiting sliding groove, and the first supporting member rotates relative to the first limiting sliding groove; The spindle assembly is provided with a second limiting sliding groove, the second supporting member is connected to the second limiting sliding groove, and the second supporting member rotates relative to the second limiting sliding groove.

10. The rotating shaft mechanism according to any one of claims 1 to 9, characterized in that: The damping block slides along the length direction of the main shaft assembly.

11. The rotating shaft mechanism according to claim 10, characterized in that: The main shaft assembly is provided with a limit block, and the damping block is provided with a hollow structure matched with the limit block, and the limit block is used to limit the sliding distance of the damping block along the length direction of the main shaft assembly.

12. An electronic device, characterized in that: It comprises the rotating shaft mechanism according to any one of claims 1 to 11, a first shell, and a second shell, wherein the first shell is connected to a first supporting member of the rotating shaft mechanism, and the second shell is connected to a second supporting member of the rotating shaft mechanism.

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