Hinge mechanism and electronic device

Abstract

This application provides a hinge mechanism and an electronic device. The hinge mechanism has a main shaft assembly and a pair of swing arm assemblies arranged on both sides of the main shaft assembly. Each pair of swing arm assemblies is symmetrically arranged with respect to the centerline of the main shaft assembly and can rotate synchronously. Each swing arm assembly includes a slider, a swing rod, a linkage mechanism, and a linkage shaft. When the slider of the swing arm assembly on one side is connected to a first housing of the foldable electronic device and the slider of the swing arm assembly on the other side is connected to a second housing, the relative sliding of the slider and the swing rod allows the dimensions of the hinge mechanism to be adaptively adjusted during the relative rotation of the two housings, avoiding increased stress on the display section during the folding and unfolding of the electronic device. Furthermore, the above structure also improves the smoothness and stability of the folding and unfolding process of the electronic device.

Description

Technical Field

[0001] This application relates to folding structures for electronic devices, and more specifically to hinge mechanisms and electronic devices including such hinge mechanisms. Background Technology

[0002] Diverse display designs offer the electronics industry more application options for electronic devices. The hinge mechanism (or pivot mechanism) that enables the folding or opening / closing of the display is a key component in such devices. However, existing hinge mechanisms in electronic devices have the following problems: First, during the folding and unfolding process, the hinge dimensions cannot adaptively adjust to changes in the folding angle of the two relatively rotating housings. This can cause the display to be subjected to tension and compression from the two housings, increasing stress on the display during folding and unfolding, and consequently reducing the reliability of the display. Second, some electronic devices exhibit stability issues such as stuttering during the folding and unfolding process. Summary of the Invention

[0003] In view of this, a novel hinge mechanism is proposed, which exhibits smooth and stable rotation and whose dimensions can be adaptively adjusted. An electronic device incorporating the aforementioned hinge mechanism is also proposed, in which the dimensions of the hinge mechanism can be adaptively adjusted during the changing folding angle of the two housings rotating relative to each other. This avoids the problem of increased stress on the display unit during folding and unfolding of the electronic device caused by the inability of existing hinge mechanisms to adapt, and further improves the smoothness and stability of the folding and unfolding process.

[0004] Therefore, the technical solution adopted in this application is as follows.

[0005] In a first aspect, embodiments of this application provide a hinge mechanism, the hinge mechanism including a main shaft assembly and a swing arm assembly, the swing arm assemblies being arranged in pairs on both sides of the main shaft assembly and rotatably connected to the main shaft assembly, each pair of swing arm assemblies being symmetrically arranged with respect to the centerline of the main shaft assembly and capable of rotating synchronously, each swing arm assembly including:

[0006] A swing arm, which is rotatably connected to the main shaft assembly;

[0007] A slider having a groove, the rocker arm being inserted into the groove;

[0008] A linkage mechanism, wherein the linkage mechanism is rotatably connected to both the main shaft assembly and the slider, and the linkage mechanism has a linkage hole; and

[0009] A linkage shaft, which rotates with the rocker arm, is inserted into the linkage hole.

[0010] During the rotation of the entire swing arm assembly relative to the main shaft assembly, the swing arm can slide in the slide groove, and the swing arm causes the linkage mechanism to rotate relative to the main shaft assembly and the slider via the linkage shaft.

[0011] By adopting the above technical solution, during the folding and unfolding process of the foldable electronic device using the above hinge mechanism, on the one hand, the length of the hinge mechanism itself can be adaptively adjusted, thereby avoiding the problem of increased stress on the display part of the electronic device during folding due to the inability of existing hinges to be adaptively adjusted; on the other hand, the linkage mechanism keeps the swing arm and the slider connected during relative sliding, and the linkage mechanism also achieves linkage with the swing arm through a simple structure, improving the smoothness and stability of the hinge mechanism rotation.

[0012] In one possible implementation according to the first aspect, the spindle assembly includes a rocker arm pivot parallel to the centerline, the rocker arm being rotatably connected to the spindle assembly via the rocker arm pivot, and the linkage shaft being parallel to and non-coaxial with the rocker arm pivot.

[0013] By adopting the above technical solution, when the structure and size of the rocker arm and the linkage mechanism are different, resulting in different rotation trajectories around the main shaft assembly, the linkage shaft and the rocker arm rotation shaft are arranged non-coaxially, so that the rocker arm and the linkage mechanism can be smoothly linked without getting stuck during the rotation of the rocker arm assembly relative to the main shaft assembly.

[0014] In one possible implementation according to the first aspect, the linkage mechanism includes a first connector rotatably connected to the main shaft assembly and the rocker arm.

[0015] The first connector has a first elongated hole that serves as the linkage hole. The cross-sectional shape of the first elongated hole is oblong. The linkage shaft is inserted through the first elongated hole and can move along its first length direction within the first elongated hole.

[0016] By adopting the above technical solution, the linkage mechanism and the rocker arm are linked with a simple structure. Furthermore, by using the linkage shaft to cooperate with the elongated hole, the influence of the different rotational trajectories of the first connecting member and the rocker arm during the linkage process on the movement of the linkage shaft is compensated, preventing the rocker arm and the linkage mechanism from jamming during the linkage process.

[0017] In one possible implementation according to the first aspect, the linkage mechanism further includes:

[0018] A second connector, rotatably connected to the spindle assembly, and rotatably connected to the first connector; and

[0019] The first support plate is rotatably connected to the second connector and the slider. When the swing arm assembly is in the unfolded state relative to the main shaft assembly, the first support plate rotates to the support position.

[0020] By adopting the above technical solution, an optional linkage mechanism structure is proposed, which enables the slider and the main shaft assembly to remain connected during the operation of the hinge mechanism. Furthermore, when the hinge mechanism of this application is used in a foldable electronic device, the first support plate of the linkage mechanism can support the display section of the electronic device when it is in the unfolded state.

[0021] In one possible embodiment according to the first aspect, the spindle assembly further includes a first connecting rod shaft parallel to the swing arm shaft, the connecting mechanism further includes a first pin shaft parallel to the swing arm shaft, the first connector further forms a first circular hole and a second elongated hole with an oblong cross-sectional shape, and the second connector forms a second circular hole.

[0022] The first connecting rod shaft is inserted through the first circular hole, and the first pin is inserted through the second circular hole and the second elongated hole. The first pin is able to move along its second length direction in the second elongated hole.

[0023] By adopting the above technical solution, in the above-mentioned optional linkage mechanism structure, the cooperation between the hole and the shaft enables the first connecting member to rotate relative to the main shaft assembly, and enables the first connecting member to drive the second connecting member to rotate to achieve linkage between the two. Furthermore, the cooperation between the pin and the elongated hole compensates for the influence of the different rotational trajectories of the first and second connecting members on the movement of the pin, preventing the first and second connecting members from jamming during linkage.

[0024] In one possible embodiment according to the first aspect, the spindle assembly further includes a second connecting rod shaft parallel to the rocker arm shaft, the connecting mechanism further includes a second pin shaft parallel to the rocker arm shaft, and the second connector further forms a third and a fourth circular hole offset from the second circular hole.

[0025] The second connecting rod shaft is inserted through the third circular hole, and the second pin is inserted through the fourth circular hole and the first support plate.

[0026] By adopting the above technical solution, in the above optional linkage mechanism structure, the second connecting member can rotate relative to the main shaft assembly through the cooperation of the hole and the shaft, and the second connecting member can drive the first support plate to rotate so as to achieve linkage between the two.

[0027] In one possible implementation according to the first aspect

[0028] In the cross-section of the first connector, both the first length direction and the second length direction pass through the center of the cross-section of the first circular hole, and the first length direction and the second length direction form a predetermined angle.

[0029] In the cross-section of the second connector, the centers of the second circular hole, the third circular hole, and the fourth circular hole are not on the same straight line.

[0030] By adopting the above technical solution and arranging the holes in the first and second connectors, it is possible to ensure that the swing arm, the first connector, the second connector and the first support plate can move smoothly together without getting stuck, and also to ensure that the first support plate is in the desired support position when the swing arm assembly is in the unfolded state relative to the main shaft assembly.

[0031] In one possible embodiment according to the first aspect, the rocker arm pivot is a camshaft, the main shaft assembly and the rocker arm are both formed with camshaft holes corresponding to the camshaft, the camshaft is inserted through the camshaft holes of the main shaft assembly and the rocker arm, the camshaft is rotatable within a predetermined range in the camshaft holes, and the rocker arm and the main shaft assembly are rotatably connected by the camshaft.

[0032] By adopting the above technical solution, another rotating connection structure for the rocker arm and the main shaft assembly is proposed. By using the camshaft hole to cooperate with the camshaft, the relative rotation angle between the rocker arm and the main shaft assembly can be limited during the rotation of the rocker arm relative to the main shaft assembly, thus preventing the hinge mechanism from being damaged due to excessive rotation of the rocker arm.

[0033] In one possible embodiment according to the first aspect, the linkage shaft is fixed to the camshaft, and the central axis of the linkage shaft and the central axis of the base circle portion of the camshaft are arranged parallel to each other and non-coaxially.

[0034] By adopting the above technical solution, a method for easily implementing the linkage shaft is proposed in the alternative structural scheme for achieving a rotatable connection between the rocker arm and the main shaft assembly. Furthermore, when the different structures and dimensions of the rocker arm and the linkage mechanism result in different rotational trajectories around the main shaft assembly, the non-coaxial arrangement of the base circle of the linkage shaft and the camshaft (which serves as the rocker arm's rotation axis) ensures that the rocker arm and the linkage mechanism can smoothly link without jamming during the rotation of the rocker arm assembly relative to the main shaft assembly.

[0035] In one possible implementation of the first aspect, the linkage mechanism further includes a first support plate rotatably connected to the first connector and rotatably connected to the slider, wherein the first support plate rotates to a support position when the swing arm assembly is in an extended state relative to the main shaft assembly.

[0036] By adopting the above technical solution, the structure of the linkage mechanism is simplified. The first support plate is used to keep the first connecting member and the slider always connected. Moreover, when the hinge mechanism of this application is used in a foldable electronic device, the first support plate of the linkage mechanism can support the display part of the electronic device when the swing arm assembly is in the unfolded state along with the foldable electronic device.

[0037] In one possible embodiment according to the first aspect, the rocker arm includes a plate-shaped rocker arm body, a rocker arm connecting portion, and a protrusion.

[0038] The rocker arm connecting portion extends from the rocker arm body toward the main shaft assembly, and the rocker arm connecting portion has a rocker arm shaft hole, through which the rocker arm shaft is inserted.

[0039] The protrusion protrudes from the surface of the main body of the rocker arm in a direction perpendicular to the surface, and both the main body of the rocker arm and the protrusion are inserted into the groove.

[0040] By adopting the above technical solution, a simple and reliable rocker arm is provided. The rocker arm uses the structure of the protrusion and the sliding groove of the slider to prevent them from tilting during relative sliding.

[0041] In one possible implementation of the first aspect, the slider has a first support surface and the rocker arm has a second support surface. When the rocker arm assembly is in a folded state relative to the main shaft assembly, the first support surface and the second support surface are coplanar to support the first support plate.

[0042] By adopting the above technical solution, when the foldable electronic device using the above hinge mechanism is in a folded state, the above support surface can stably support the first support plate of the linkage mechanism, which is beneficial to the structural stability of the hinge mechanism.

[0043] Secondly, embodiments of this application provide an electronic device that includes the hinge mechanism described in any of the above technical solutions and is capable of being unfolded and folded via the hinge mechanism.

[0044] By adopting the above technical solution, the typical application scenarios of the hinge mechanism of this application are defined.

[0045] In one possible implementation according to the second aspect, the electronic device further includes a first housing, a second housing, and a display unit, wherein the first housing is fixed to a swing arm of the swing arm assembly located on one side of the spindle assembly, the second housing is fixed to a swing arm of the swing arm assembly located on the other side of the spindle assembly, and the display unit is disposed on the first housing, the second housing, and the hinge mechanism, and is fixed to the first housing and the second housing.

[0046] By adopting the above technical solution and utilizing the hinge mechanism, the display unit of the electronic device can be folded and unfolded while the first and second housings of the electronic device rotate relative to each other. During the above process, the folding and unfolding of the electronic device is smooth and stable, and the problem of increased stress on the display unit of the electronic device during folding is avoided due to the inability of existing hinges to make adaptive adjustments.

[0047] In one possible implementation according to the second aspect, the linkage mechanism includes a first support plate and the spindle assembly includes a second support plate, wherein in the unfolded state, the first support plate, the second support plate, the first housing, and the second housing substantially continuously support the display unit.

[0048] To prevent unwanted deformation of a portion of the display section due to lack of support when the electronic device is in the unfolded state.

[0049] These and other aspects of this application will become more apparent in the description of the following embodiments(s). Attached Figure Description

[0050] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0051] Figures 1A to 1D This is a perspective view of an electronic device according to a first embodiment of the present application, wherein... Figure 1A and Figure 1C The electronic devices in the middle are in a folded state. Figure 1B and Figure 1D The electronic device is in an unfolded state, and its display section is omitted.

[0052] Figure 1EIt shows Figure 1D An enlarged schematic diagram of the electronic device, wherein a portion of the spindle assembly structure is omitted to illustrate the hinge mechanism according to this application.

[0053] Figure 2A It shows Figure 1E A three-dimensional diagram of a partial structure of the hinge mechanism in the image.

[0054] Figure 2B It shows Figure 2A A schematic diagram of the decomposed structure in the image.

[0055] Figure 3A and Figure 3B It is used for explanation Figure 1A A cross-sectional schematic diagram of the movement process of the rocker arm in the hinge mechanism of an electronic device. Figure 3A The electronic devices in the middle are in a folded state. Figure 3B The electronic equipment in the middle is in the unfolded state.

[0056] Figure 4A and Figure 4B It is used for explanation Figure 1A A cross-sectional schematic diagram of the motion process of the first connecting member of the linkage mechanism of the hinge mechanism in an electronic device. Figure 4A The electronic devices in the middle are in a folded state. Figure 4B The electronic equipment in the middle is in the unfolded state.

[0057] Figure 5A and Figure 5B It is used for explanation Figure 1A A cross-sectional schematic diagram of the movement process of the second connecting member of the hinge mechanism of an electronic device. Figure 5A The electronic devices in the middle are in a folded state. Figure 5B The electronic equipment in the middle is in the unfolded state.

[0058] Figure 6A and Figure 6B It is used for explanation Figure 1A A cross-sectional schematic diagram showing the state of the first support plate of the linkage mechanism of the hinge mechanism in an electronic device and the second support plate of the spindle assembly. Figure 6A The electronic devices in the middle are in a folded state. Figure 6B The electronic equipment in the middle is in the unfolded state.

[0059] Figure 7A This is a perspective view showing a partial structure of the hinge mechanism of an electronic device according to a second embodiment of this application.

[0060] Figure 7B It shows Figure 7A A schematic diagram of the decomposed structure in the image.

[0061] Figure 7C It shows Figure 7A A three-dimensional view of the conversion component of the hinge mechanism in the image.

[0062] Explanation of reference numerals in the attached figures

[0063] H1 First housing; H2 Second housing; D Display unit; HN Hinge mechanism; HN1 Constant length holding mechanism; HN2 Damping synchronization device

[0064] 1. Main spindle assembly 1p; 2. Second support plate 1o; 3. Outer spindle 1i; 4. Fixing assembly 11; 5. Base 11h; 6. First camshaft hole 12; 7. Rocker arm shaft 12h; 8. Pin hole 13; 9. First connecting rod shaft 14; 10. Second connecting rod shaft 15; 11. Third connecting rod shaft

[0065] 2. Rocker arm 21. Rocker arm main body 21s. Support surface 22. Rocker arm connecting part 22h1. Rocker arm shaft hole 22h2. Rocker arm pin hole 22h3. Second camshaft hole 23. Protrusion

[0066] 3. Slider 3c, Slide groove 3h, Slider pin hole 3s, Support surface

[0067] 4 Linkage Mechanism 41 First Connector 411 First Branch 412 Second Branch 41h1 First Round Hole 41h2 First Long Hole 41h3 Second Long Hole 42 Second Connector 421 Main Body 422 Lug 42h1 Second Round Hole 42h2 Third Round Hole 42h3 Fourth Round Hole 43 First Support Plate 44 Linkage Shaft 45 First Pin 46 Second Pin 47 Third Pin 48 Converter 481 Rotating Shaft Lug 482 Long Hole Lug 483 Coupling Part Detailed Implementation

[0068] The following detailed description of various exemplary embodiments, features, and aspects of this application will be based on the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0069] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0070] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0071] In this application, "length direction", "width direction" and "thickness direction" refer to the length direction, width direction and thickness direction of each component of the hinge mechanism, respectively.

[0072] In this application, "rotational connection" refers to two components connected together in a manner that allows them to rotate relative to each other. This can be two components rotating about a connector that connects them, for example, a first component and a second component are connected by a pivot and can rotate about the central axis of the pivot; or it can be a case where one component is connected to another component and one component rotates about a part of the other component.

[0073] In this application, the cross-sectional shape is described as "oblong," meaning it comprises a first arc portion, a middle portion, and a second arc portion connected together, with the middle portion located between the first and second arc portions. The outline of the middle portion consists of two line segments of equal length, each segment connecting to the opposite endpoints of the arc outlines of both the first and second arc portions. Furthermore, this shape is line-symmetrical about the straight line connecting the centers of the arc outlines of both the first and second arc portions. Further, when the radii of the arc outlines of both the first and second arc portions are equal, the two line segments serving as the outline of the middle portion are parallel to each other, and in this case, the oblong outline shape is identical to the shape of a running track in the conventional sense.

[0074] In this application, the cross-section of each component is a cross-section perpendicular to its respective length direction. Unless otherwise specified, the cross-section of the "shaft" and the "hole" in each component is circular.

[0075] The technical concept of this application is first described below. In the technical solution of this application, the hinge mechanism has a main shaft assembly and a pair of swing arm assemblies arranged on both sides of the main shaft assembly. The swing arm assemblies are rotatably connected to the main shaft assembly, and each pair of swing arm assemblies is symmetrically arranged with respect to the center line of the main shaft assembly and can rotate synchronously. Each swing arm assembly includes a slider, a swing rod, a linkage mechanism, and a linkage shaft. When the slider of the swing arm assembly located on one side of the main shaft assembly is connected to a first component (e.g., the first housing of a foldable electronic device) and the slider of the swing arm assembly located on the other side of the main shaft assembly is connected to a second component (e.g., the second housing of a foldable electronic device), the relative sliding configuration of the slider and the swing rod allows the size of the hinge mechanism to be adaptively adjusted during the relative rotation of the first and second components. At the same time, the linkage mechanism can ensure the connection relationship and relative position relationship between the slider and the swing rod, and the linkage shaft can ensure that the linkage mechanism and the swing rod rotate relative to each other with a predetermined constraint relationship. Therefore, when such a hinge mechanism is used in foldable electronic devices such as inward-folding mobile phones, the size of the hinge mechanism can be adaptively adjusted during the folding and unfolding of the electronic device, avoiding the problem of increased stress on the display part during the folding and unfolding of the electronic device. Moreover, the above-described structure improves the smoothness and stability of the folding and unfolding process of the foldable electronic device with a simple structure.

[0076] In this embodiment of the application, the electronic device can be a mobile phone, tablet computer, laptop computer, or other electronic device that can be folded through a hinge structure.

[0077] The following describes the structure and operation of an electronic device according to a first embodiment of this application.

[0078] (Electronic device according to the first embodiment of this application)

[0079] like Figures 1A to 1E As shown, the electronic device according to the first embodiment of this application includes a first housing H1, a second housing H2, and a hinge mechanism HN (including a constant-length holding mechanism HN1 and a damping synchronization device HN2) assembled together. In this embodiment, the electronic device is an inward-folding mobile phone. Three constant-length holding mechanisms HN1 and two damping synchronization devices HN2 are arranged along the length direction of the hinge mechanism HN. The three constant-length holding mechanisms HN1 are spaced apart along the length direction of the hinge mechanism HN, with two constant-length holding mechanisms HN1 located near their ends and the other constant-length holding mechanism HN1 located at the center of the hinge mechanism HN. Through the three constant-length holding mechanisms HN1 and the two damping synchronization devices HN2, the first housing H1 and the second housing H2 can achieve synchronous relative rotation, thereby enabling the electronic device to be in a folded state and an unfolded state.

[0080] In the folded state, such as Figure 1A and Figure 1C As shown, the first housing H1, the second housing H2, and the swing arm assembly of the hinge mechanism HN are erected relative to the main shaft assembly 1 of the hinge mechanism HN, with the first housing H1 and the second housing H2 parallel to each other. In this state, the first housing H1, the second housing H2, and the main shaft assembly 1 of the hinge mechanism HN constitute the external design structure of the electronic device.

[0081] In the unfolded state, such as Figure 1B and Figure 1D As shown, the front and back faces of the first housing H1, the second housing H2, and the main shaft assembly 1 of the hinge mechanism HN can be considered to be located on the same plane. Further, see... Figures 3A to 6B As shown, a portion of the display unit D is fixed to the first housing H1, and the first housing H1 is fixed to the slider 3 on one side of the main shaft assembly 1 of the hinge mechanism HN. The other portion of the display unit D is fixed to the second housing H2, and the second housing H2 is fixed to the slider 3 on the other side of the main shaft assembly 1 of the hinge mechanism HN. Thus, the display unit D of the electronic device (see...) Figure 3B , Figure 4B , Figure 5B and Figure 6B The first housing H1, the second housing H2, the second support plate 1p of the main shaft assembly 1 (described in detail below) and the first support plate 43 of the linkage mechanism 4 (described in detail below) are continuously supported with virtually no gaps.

[0082] Furthermore, the damping synchronization device HN2 can ensure that the first housing H1 and the second housing H2 rotate synchronously relative to the main shaft assembly 1, and can keep the first housing H1 and the second housing H2 at a predetermined angle relative to the main shaft assembly 1.

[0083] The structure of the hinge mechanism HN is described in detail below with reference to the accompanying drawings.

[0084] like Figure 2A and Figure 2B As shown, the hinge mechanism HN includes a main shaft assembly 1 (including an outer main shaft 1o and a fixed assembly 1i) and a swing arm assembly (including a swing rod 2, a slider 3, a linkage mechanism 4 and a linkage shaft 44) assembled together, wherein the fixed assembly 1i and the swing arm assembly constitute the aforementioned constant length holding mechanism HN1.

[0085] In this embodiment, as Figure 2A and Figure 2BAs shown, the spindle assembly 1 has a structure and shape symmetrical with respect to its centerline extending along its length, and the spindle assembly 1 includes an outer spindle 1o and a fixing assembly 1i. The outer spindle 1o extends linearly along the entire length of the hinge mechanism HN. The two sides of the outer surface of the outer spindle 1o in the width direction are formed as arcuate surfaces, allowing the first housing H1 and the second housing H2 to move along the arcuate surfaces during rotation. A space for housing the fixing assembly 1i is formed inside the outer spindle 1o, and the fixing assembly 1i is housed in this space and fixed to the outer spindle 1o. The fixing assembly 1i includes a base portion 11, a rocker arm pivot 12, a first connecting rod pivot 13, and a second connecting rod pivot 14. The base portion 11 has a structure and shape adapted to the inner surface of the outer spindle 1o. The rocker arm pivot 12, the first connecting rod pivot 13, and the second connecting rod pivot 14 are all mounted on the base portion 11. The oscillating arm shaft 12, the first connecting rod shaft 13, and the second connecting rod shaft 14 are all solid shafts that extend in a straight line, have a constant shaft diameter, and a circular cross-section. The oscillating arm shaft 12, the first connecting rod shaft 13, and the second connecting rod shaft 14 are parallel to each other and all extend along the length of the base portion 11. The oscillating arm shaft 12, the first connecting rod shaft 13, and the second connecting rod shaft 14 are not coaxially arranged. Furthermore, in this embodiment, to save installation space and to correspond with other structures used to install these shafts 12, 13, and 14, each shaft 12, 13, and 14 can be installed in segments on the base portion 11. For any given shaft 12, 13, or 14, the segments of the same shaft remain coaxially arranged.

[0086] Furthermore, such as Figure 3A and Figure 3B As shown, the rocker arm shaft 12 is inserted into the rocker arm shaft hole 22h1 passing through the rocker arm 2, so that the rocker arm 2 is rotatably connected to the fixed assembly 1i. Figure 4A and Figure 4B As shown, the first connecting rod shaft 13 is inserted into the first circular hole 41h1 of the first connecting member 41 of the connecting rod mechanism 4, so that the first connecting member 41 is rotatably connected to the fixed assembly 1i. Figure 5A and Figure 5B As shown, the second connecting rod shaft 14 is inserted into the third circular hole 42h2 of the second connecting member 42 passing through the connecting rod mechanism 4, so that the second connecting member 42 is rotatably connected to the fixed component 1i.

[0087] In this embodiment, as Figures 1E to 6B As shown, pairs of swing arm assemblies are arranged on both sides of the main spindle assembly 1 and are rotatably connected to the main spindle assembly. Each pair of swing arm assemblies is symmetrically arranged with respect to the center line of the main spindle assembly 1. Each swing arm assembly includes a swing rod 2, a slider 3, a linkage mechanism 4, and a linkage shaft 44 assembled together.

[0088] In this embodiment, as Figure 2A and Figure 2BAs shown, the rocker arm 2 includes a rocker arm body portion 21, a rocker arm connecting portion 22, and a protrusion 23. The rocker arm body portion 21 is formed as a generally flat plate. The two rocker arm connecting portions 22 are formed as lugs extending from the rocker arm body portion 21 toward the fixing assembly 1i. The two rocker arm connecting portions 22 extend from the width direction end edge of the rocker arm body portion 21 opposite to the fixing assembly 1i and are located at both ends of the width direction end edge. Each rocker arm connecting portion 22 has a rocker arm shaft hole 22h1 and a rocker arm pin hole 22h2. The rocker arm shaft hole 22h1 and the rocker arm pin hole 22h2 are spaced apart from each other and extend through the rocker arm connecting portion 22 along the length direction of the rocker arm body portion 21 (which is consistent with the length direction of the fixing assembly 1i). The rocker arm shaft hole 22h1 is used for the rocker arm pivot 12 of the fixing assembly 1i to be inserted through, and the rocker arm pin hole 22h2 is used for the linkage shaft 44 to be inserted through. Two protrusions 23 protrude from the surface of the main body 21 of the rocker arm in a direction perpendicular to the surface (thickness direction), and are located at both ends of the main body 21 of the rocker arm in the length direction. Both the main body 21 of the rocker arm and the protrusions 23 are inserted into the groove 3c of the slider 3 so that during the reciprocating rotation of the slider 3 and the rocker arm 2 relative to the fixed assembly 1i, the main body 21 of the rocker arm 2 and the protrusions 23 of the rocker arm 2 reciprocate within the groove 3c. Further, a portion of the main body 21 is formed with an inclined support surface 21s, which cooperates with the support surface 3s of the slider 3 to support the first support plate 43 of the linkage mechanism 4 when the electronic device is in a folded state.

[0089] In this embodiment, as Figure 2A and Figure 2B As shown, the slider 3 has a groove 3c for accommodating a portion of the structure of the rocker arm 2 (both the rocker arm body 21 and the protrusion 23). The opening of the groove 3c facing the rocker arm 2 matches the contour shape of both the rocker arm body 21 and the protrusion 23, and the groove 3c can extend through the slider 3 in the width direction. A slider pin hole 3h is also formed on the end edge of the slider 3 away from the rocker arm 2, through which a third pin 47 (see below) is inserted. Figure 3A and Figure 6A (etc.), the slider 3 is rotatably connected to the first support plate 43 of the linkage mechanism 4. Furthermore, the slider 3 also has an inclined support surface 3s, which extends obliquely from the portion forming the slider pin hole 3h to the opening of the slide groove 3c facing the rocker arm 2. Thus, the support surface 3s of the slider 3 cooperates with the support surface 21s of the main body 21 of the rocker arm 2 to support the first support plate 43 of the linkage mechanism 4 when the electronic device is in a folded state.

[0090] By adopting the above structure, when the housings H1 and H2, which are fixed to the sliders 3 on both sides of the fixed assembly 1i, rotate relative to each other, the rocker arm 2 can reciprocate within the groove 3c of the slider 3. Furthermore, when the housings H1 and H2 rotate relative to each other, the linkage mechanism 4 serves to ensure the connection between the slider 3 and the fixed assembly 1i, and also rotates relative to the slider 3 and the rocker arm 2 with a predetermined constraint relationship. In the folded state, it cooperates with the second support plate 1p of the main shaft assembly 1 and the housings H1 and H2 to support the display section D of the electronic device.

[0091] In this embodiment, as Figures 2A to 6B As shown, the linkage mechanism 4 includes a first connecting member 41, a second connecting member 42, a first support plate 43, a first pin 45, a second pin 46, and a third pin 47.

[0092] like Figure 2A , Figure 2B , Figure 4A and Figure 4B As shown, the first connector 41 is rotatably connected to the fixed assembly 1i, and the first connector 41 is rotatably connected to the swing arm 2 and can be linked with the swing arm 2. The first connector 41 includes a first branch 411 and two second branches 412 formed integrally. One end of the first branch 411 and one end of the two second branches 412 are fixed, and the first branch 411 and the two second branches 412 form a predetermined angle. The two second branches 412 are parallel to each other and spaced apart. Further, a first circular hole 41h1 is formed at the connection between the first branch 411 and the two second branches 412, and the cross-sectional shape of the first circular hole 41h1 is circular. The first branch 411 forms a first elongated hole 41h2, and both second branches 412 form second elongated holes 41h3, and the cross-sectional shape of both the first elongated hole 41h2 and the second elongated hole 41h3 is oblong. In the cross-section of the first connector 41, the first length direction of the elongated ellipse of the first elongated hole 41h2 and the second length direction of the elongated ellipse of the second elongated hole 41h3 both pass through the center of the cross-section of the first circular hole 41h1, and the first length direction and the second length direction form a predetermined angle, which is an obtuse angle in this embodiment. Figure 4A and Figure 4B As shown, the first connecting shaft 13 of the fixed component 1i is inserted through the first circular hole 41h1, so that the first connecting member 41 is rotatably connected to the fixed component 1i; the linkage shaft 44 is inserted through the first elongated hole 41h2, so that while the first connecting member 41 is rotatably connected to the rocker arm 2, the linkage shaft 44 can move along the first length direction in the first elongated hole 41h2; the first pin 45 is inserted through the second elongated hole 41h3, so that while the first connecting member 41 is rotatably connected to the second connecting member 42, the first pin 45 can move along the second length direction in the second elongated hole 41h3.

[0093] like Figure 2A , Figure 2B , Figure 5A and Figure 5B As shown, the second connector 42 includes a main body 421 and a lug 422. The lug 422 protrudes from the central portion of the main body 421 along its length, forming a predetermined angle with the main body 421. The main body 421 has a second circular hole 42h1 and a third circular hole 42h2, and the lug 422 has a fourth circular hole 42h3. The cross-sectional shapes of the second circular hole 42h1, the third circular hole 42h2, and the fourth circular hole 42h3 are all circular. In the cross-section of the second connector 42, the centers of the circles of the second circular hole 42h1, the third circular hole 42h2, and the fourth circular hole 42h3 are not collinear, and the lines connecting each pair of their centers form a triangle. Figure 5A and Figure 5B As shown, the second connecting rod shaft 14 is inserted through the third circular hole 42h2, causing the second connecting member 42 to be rotatably connected to the fixed assembly 1i; the first pin 45 is inserted through the second circular hole 42h1, causing the second connecting member 42 to be rotatably connected to the first connecting member 41 and to be able to move in conjunction with the first connecting member 41; the second pin 46 is inserted through the fourth circular hole 42h3, causing the second connecting member 42 to be rotatably connected to the first support plate 43.

[0094] like Figures 3A to 6B As shown, the first support plate 43 includes a flat main body and a lug fixed to the main body. Different lugs form a fifth circular hole corresponding to the fourth circular hole 42h3 of the second connector 42 and a sixth circular hole corresponding to the slider pin hole 3h of the slider 3. Thus, the second connector 42 is rotatably connected to the first support plate 43 by inserting a second pin 46 into the fifth circular hole; and the first support plate 43 is rotatably connected to the slider 3 by inserting a third pin 47 into the sixth circular hole.

[0095] like Figures 2A to 6BAs shown, the linkage shaft 44, the first pin 45, the second pin 46, and the third pin 47 are all solid shafts that extend in a straight line, have a constant shaft diameter, and a circular cross-section. When the linkage shaft 44 and each pin 45, 46, 47 are inserted into the corresponding circular holes, the linkage shaft 44 and each pin 45, 46, 47 match the shape of the circular holes, and the linkage shaft 44 and each pin 45, 46, 47 will not experience radial movement in the circular holes; when the linkage shaft 44 and the first pin 45 are inserted into the corresponding elongated hole, the linkage shaft 44 and the first pin 45 can move along the length direction of the elongated hole. Furthermore, the linkage shaft 44, the first pin 45, the second pin 46, and the third pin 47 are parallel to the rocker arm pivot 12, and can move relative to the rocker arm pivot 12 while maintaining parallelism with the rocker arm pivot 12. As described above, the pivot shaft 12 is inserted into the rocker arm 2, causing the rocker arm 2 to be rotatably connected to the fixed assembly 1i. The linkage shaft 44 is inserted through the first connector 41 and the rocker arm 2, causing the first connector 41 and the rocker arm 2 to be rotatably connected. The first pin 45 is inserted through the first connector 41 and the second connector 42, causing the first connector 41 and the second connector 42 to be rotatably connected. The second pin 46 is inserted through the second connector 42 and the first support plate 43, causing the second connector 42 and the first support plate 43 to be rotatably connected. The third pin 47 is inserted through the first support plate 43 and the slider 3, causing the first support plate 43 and the slider 3 to be rotatably connected. In this way, the linkage mechanism 4 always maintains the connection relationship between the slider 3 and the fixed assembly 1i, and the linkage mechanism 4 and the rocker arm 3 can move relative to each other with a predetermined constraint relationship. The first connector 41, the second connector 42, and the first support plate 43 of the rocker arm mechanism 4 can also move relative to each other with a predetermined constraint relationship.

[0096] The following is for reference Figures 3A to 6B This describes the movement of the main components during the folding and unfolding process of the electronic device including the hinge mechanism HN according to this embodiment.

[0097] like Figure 3A and Figure 3B As shown, when the electronic device is in such a state Figure 3A In the folded state shown, the electronic device's housings H1 and H2, display unit D, and the swing arm assembly of the hinge mechanism HN are all upright relative to the main shaft assembly 1. Parts of the display unit D and another part of the display unit D are opposite each other. The main body 21 and part of the protrusion 23 of each swing arm 2 in the hinge mechanism HN are inserted into the corresponding slide groove 3c of the slider 3. From this folded state, the swing arms 2 on both sides of the main shaft assembly 1 rotate relative to the fixed assembly 1i about the swing arm pivot 12 in a direction separating from each other, until the electronic device rotates to... Figure 3B In the unfolded state shown, during rotation, the swing arm 2 extends along the slide groove 3c into the interior of the slide groove 3c until... Figure 3B The deepest position shown.

[0098] like Figure 4A and Figure 4B As shown, when the electronic device is in such a state Figure 4A In the folded state shown, the housings H1 and H2 of the electronic device, the display unit D, and the swing arm assembly of the hinge mechanism HN are all erected relative to the main shaft assembly 1. One part of the display unit D and another part of the display unit D are opposite to each other. The linkage shaft 44 and the first pin 45 hold the first connector 41 in place as shown. Figure 4A The state shown. From the folded state, the rocker arms 2 on both sides of the main shaft assembly 1 rotate relative to the fixed assembly 1i around the rocker arm pivot 12 in a direction separating from each other. The rotation of the rocker arms 2 drives the corresponding first connecting piece 41 to rotate via the linkage shaft 44, until the electronic device rotates to the position shown. Figure 4B The unfolded state is shown. During the process of the swing arm 2 driving the first connecting member 41 to rotate relative to the fixed component 1i via the linkage shaft 44, the linkage shaft 44 moves from one end to the other end in the first elongated hole 41h2, while the position of the first pin 45 in the second elongated hole 41h3 remains unchanged.

[0099] like Figure 5A and Figure 5B As shown, when the electronic device is in such a state Figure 5A In the folded state shown, the housings H1 and H2 of the electronic device, the display unit D, and the swing arm assembly of the hinge mechanism HN are all erected relative to the main shaft assembly 1. One part of the display unit D and another part of the display unit D are opposite each other. The first pin 45 and the second pin 46 hold the second connector 42 in place as shown. Figure 5A The state shown. From the folded state, the rocker arms 2 on both sides of the main shaft assembly 1 rotate relative to the fixed assembly 1i around the rocker arm pivot 12 in a direction of separation from each other. The rotation of the rocker arms 2 drives the corresponding first connecting member 41 to rotate via the linkage shaft 44. The first connecting member 41 drives the second connecting member 42 to rotate relative to the fixed assembly 1i via the first pin 45, until the electronic device rotates to the desired position. Figure 5B The unfolded state shown.

[0100] like Figure 6A and Figure 6B As shown, when the electronic device is in such a state Figure 6A In the folded state shown, the housings H1 and H2 of the electronic device, the display unit D, and the swing arm assembly of the hinge mechanism HN are all erected relative to the main shaft assembly 1. One part of the display unit D and another part of the display unit D are opposite each other. The second pin 46 and the third pin 47 hold the first support plate 43 in place as shown. Figure 6AThe state shown. From the folded state, the swing arms 2 on both sides of the main shaft assembly 1 rotate relative to the fixed assembly 1i around the swing arm pivot 12 in a direction of separation from each other. The rotation of the swing arms 2 drives the corresponding first connecting member 41 to rotate via the linkage shaft 44. The first connecting member 41 drives the second connecting member 42 to rotate relative to the fixed assembly 1i via the first pin 45. The second connecting member 42 drives the first support plate 43 to rotate via the second pin 46 until the electronic device rotates to the desired position. Figure 6B In the unfolded state shown, the support surfaces of the first support plate 43 and the second support plate 1p of the main shaft assembly 1 are flush together to support the display part D. At this time, the first support plate 43 is in the support position.

[0101] It should be noted that, in this embodiment, as Figure 1D As shown, the outer spindle 1o of the spindle assembly 1 supports three constant-length holding mechanisms HN1 and two damping synchronization devices HN2. The first support plate 43 of the linkage mechanism 4 in the three constant-length holding mechanisms HN1 can be formed as a single unit. Figures 3A to 6B As shown, the spindle assembly 1 is also provided with a second support plate 1p for supporting the display unit D. This second support plate 1p can be fixed together with the fixing assembly 1i. When the electronic device is in the unfolded state, the second support plate 1p of the spindle assembly 1, the first support plate 43 of the linkage mechanism 4, and the support surfaces of the first housing H1 and the second housing H2 are coplanar and substantially continuous, thereby stably supporting the display unit D and preventing deformation of the display unit D. Furthermore, in this embodiment, as... Figure 1E and Figure 2A As shown, the damping synchronization device HN2 can be connected to the slider 3 of the corresponding constant length holding mechanism HN1, thereby enabling all the swing arm components of the entire hinge mechanism HN to work synchronously and to hold the hinge mechanism HN in the desired posture.

[0102] The following describes the structure and operation of an electronic device according to a second embodiment of this application.

[0103] (Electronic device according to the second embodiment of this application)

[0104] The electronic device according to the second embodiment of this application has a substantially the same structure as the electronic device according to the first embodiment of this application and is capable of performing the same function. The main differences between the two are described below.

[0105] Specifically, in this embodiment, such as Figure 7A and Figure 7BAs shown, the rocker arm shaft 12 is formed as a cam shaft with a cam-shaped cross-section. The cam shaft includes a base circle portion with a circular cross-section and a cam portion that protrudes radially outward from a portion of the base circle portion. In this embodiment, the linkage shaft (not shown) is a solid shaft with a circular cross-section, a constant shaft diameter, and continuous extension. The shaft diameter of the linkage shaft is smaller than the shaft diameter of the rocker arm shaft 12, and the central axis of the linkage shaft is not on the same straight line as the central axis of the base circle portion of the rocker arm shaft 12 and is parallel to each other. The linkage shaft is fixed to the cam portion of the rocker arm shaft 12 and is located at one circumferential end of the cam portion. The linkage shaft can be manufactured independently of the rocker arm shaft 12 and inserted into the pin hole 12h of the rocker arm shaft 12 to be fixed to the rocker arm shaft 12. In addition, a third link shaft 15 is provided on the base part 11 of the fixed component 1i. The third link shaft 15 is a solid shaft with a circular cross-section, a constant shaft diameter and continuous extension. The third link shaft 15 is not coaxial with the swing arm shaft 12 and is arranged in parallel.

[0106] Furthermore, in this embodiment, as Figure 7A and Figure 7B As shown, corresponding to the rocker arm pivot 12, the base portion 11 of the fixing assembly 1i has a first camshaft hole 11h, and the rocker arm connecting portion 22 of the rocker arm 2 has a second camshaft hole 22h3. The rocker arm pivot 12 is inserted through the first camshaft hole 11h and the second camshaft hole 22h3, so that the rocker arm 2 is rotatably connected to the fixing assembly 1i, and the rocker arm 2 and the fixing assembly 1i can rotate relative to each other within a predetermined range.

[0107] Furthermore, in this embodiment, as Figures 7A to 7C As shown, the linkage mechanism 4 includes a conversion member 48 serving as a first connecting member. The conversion member 48 includes a pivot lug 481, an elongated hole lug 482, and a coupling portion 483 fixed together. The pivot lug 481 and the two elongated hole lugs 482 are located on one side of the conversion member 48, and the coupling portion 483 is located on the other side. The pivot lug 481 is positioned between and spaced apart from the two elongated hole lugs 482. The pivot lug 481 has a circular hole corresponding to the third connecting rod pivot 15. By inserting the third connecting rod pivot 15 into this circular hole, the conversion member 48 is rotatably connected to the fixed assembly 1i. The elongated hole lugs 482 located on both sides of the pivot lug 481 each have an elongated hole with an elongated oval cross-sectional shape. The linkage shaft is inserted into the elongated hole, causing the rocker arm 2 and the conversion member 48 to be rotatably connected, and the conversion member 48 to be linked with the rocker arm 2. The linkage shaft can move along the length of the elongated hole. The coupling part 483 has a circular hole, and the first support plate 43 and the conversion member 48 are rotatably connected by a pin inserted through the circular hole. In this way, the first support plate 43 of the linkage mechanism 4 can be rotated to the same support position as in the first embodiment by means of the conversion member 48.

[0108] Therefore, by adopting the above structure, compared with the first embodiment, the structure of the second embodiment is relatively simple and can perform the same function as that described in the first embodiment, producing the same beneficial effects.

[0109] The above content describes exemplary embodiments and related variations of the specific implementation of this application, and the following is a supplementary explanation.

[0110] i. The above embodiments illustrate different embodiments and variations that can achieve the purpose of this application. It is understood that if there are no contradictions, the solutions in these embodiments and variations can be combined with each other to form new solutions.

[0111] ii. Electronic devices may be, but are not limited to, foldable phones, tablets, or laptops.

[0112] iii. It is understood that the electronic device of this application has the following beneficial effects:

[0113] The spindle assembly 1 serves not only as a functional component (for supporting the constant length holding mechanism HN1 and the damping synchronization device HN2, etc.), but also as an aesthetic component (as part of the appearance design of electronic equipment, such as...). Figure 1A and Figure 1B As shown in the figure, this can effectively shield electronic devices and has a simple and uniform appearance.

[0114] In the first embodiment, the size of the hinge mechanism HN can be adaptively adjusted during the folding process of the electronic device by combining the swing arm 2 and the slider 3, so as to avoid the display part D being subjected to undesirable tensile and compressive stress.

[0115] When the electronic device of this application is in the unfolded state, the first support plate 43 of the linkage mechanism 4, the second support plate 1p of the main shaft assembly 1, the first housing H1 and the second housing H2 support the display part D in a substantially continuous manner, thereby enabling the display part D to be fully supported as a whole. The support structure for supporting the display part D has no obvious gaps, effectively preventing the deformation of the display part D.

[0116] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce a good effect.

[0117] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A hinge mechanism, characterized by The hinge mechanism includes a main shaft assembly and a swing arm assembly. The swing arm assemblies are arranged in pairs on both sides of the main shaft assembly and are rotatably connected to the main shaft assembly. Each pair of swing arm assemblies is symmetrically arranged with respect to the center line of the main shaft assembly and can rotate synchronously. Each swing arm assembly includes: A swing arm, which is rotatably connected to the main shaft assembly; A slider having a groove, the rocker arm being inserted into the groove; A linkage mechanism, wherein the linkage mechanism is rotatably connected to both the main shaft assembly and the slider, and the linkage mechanism has a linkage hole; and A linkage shaft, which rotates with the rocker arm, is inserted into the linkage hole. During the rotation of the entire swing arm assembly relative to the main shaft assembly, the swing arm can slide in the slide groove, and the swing arm, via the linkage shaft, causes the linkage mechanism to rotate relative to the main shaft assembly and the slider. The main shaft assembly includes a swing arm pivot parallel to the center line. The swing arm is rotatably connected to the main shaft assembly via the swing arm pivot. The linkage shaft is parallel to the swing arm pivot but not coaxially arranged. The linkage mechanism includes a first connector, which is rotatably connected to the main shaft assembly and the rocker arm; the first connector has a first elongated hole that serves as the linkage hole, the cross-sectional shape of the first elongated hole is oblong, and the linkage shaft is inserted through the first elongated hole and can move along its first length direction in the first elongated hole.

2. The hinge mechanism of claim 1, wherein, The linkage mechanism also includes: A second connector, rotatably connected to the spindle assembly, and rotatably connected to the first connector; and The first support plate is rotatably connected to the second connector and the slider. When the swing arm assembly is in the unfolded state relative to the main shaft assembly, the first support plate rotates to the support position.

3. The hinge mechanism of claim 2, wherein, The main shaft assembly also includes a first connecting rod shaft parallel to the swing arm shaft, the connecting rod mechanism also includes a first pin shaft parallel to the swing arm shaft, the first connecting member also forms a first circular hole and a second elongated hole with an oblong cross-sectional shape, and the second connecting member forms a second circular hole; The first connecting rod shaft is inserted through the first circular hole, and the first pin is inserted through the second circular hole and the second elongated hole. The first pin is able to move along its second length direction in the second elongated hole.

4. The hinge mechanism of claim 3, wherein, The main shaft assembly also includes a second connecting rod shaft parallel to the swing arm shaft, and the connecting mechanism also includes a second pin shaft parallel to the swing arm shaft. The second connecting member also forms a third and a fourth circular hole offset from the second circular hole. The second connecting rod shaft is inserted through the third circular hole, and the second pin is inserted through the fourth circular hole and the first support plate.

5. The hinge mechanism according to claim 4, characterized in that, In the cross-section of the first connector, both the first length direction and the second length direction pass through the center of the cross-section of the first circular hole, and the first length direction and the second length direction form a predetermined angle. In the cross-section of the second connector, the centers of the second circular hole, the third circular hole, and the fourth circular hole are not on the same straight line.

6. The hinge mechanism of claim 1, wherein, The rocker arm pivot is a camshaft. Both the main shaft assembly and the rocker arm have camshaft holes corresponding to the camshaft. The camshaft is inserted through the camshaft holes of the main shaft assembly and the rocker arm. The camshaft can rotate within a predetermined range in the camshaft holes. The rocker arm and the main shaft assembly are rotatably connected by the camshaft.

7. The hinge mechanism of claim 6, wherein, The linkage shaft is fixed to the camshaft, and the central axis of the linkage shaft and the central axis of the base circle of the camshaft are arranged parallel to each other but not coaxially.

8. The hinge mechanism of claim 7, wherein, The linkage mechanism further includes a first support plate, which is rotatably connected to the first connector and rotatably connected to the slider. When the swing arm assembly is in the unfolded state relative to the main shaft assembly, the first support plate rotates to the support position.

9. The hinge mechanism of claim 2, 3, 4, 5, or 8, wherein, The swing arm includes a plate-shaped main body, a connecting part, and a protrusion. The rocker arm connecting part extends from the rocker arm body towards the main shaft assembly, and the rocker arm connecting part is formed with a rocker arm shaft hole, through which the rocker arm shaft is inserted; The protrusion protrudes from the surface of the main body of the rocker arm in a direction perpendicular to the surface, and both the main body of the rocker arm and the protrusion are inserted into the groove.

10. The hinge mechanism of claim 9, wherein, The slider has a first support surface, and the swing arm has a second support surface. When the swing arm assembly is in a folded state relative to the main shaft assembly, the first support surface and the second support surface are coplanar to support the first support plate.

11. An electronic device, comprising: The electronic device includes the hinge mechanism according to any one of claims 1 to 10, and is capable of being unfolded and folded via the hinge mechanism.

12. The electronic device of claim 11, wherein, The electronic device further includes a first housing, a second housing, and a display unit. The first housing is fixed to the swing arm of the swing arm assembly located on one side of the spindle assembly, and the second housing is fixed to the swing arm of the swing arm assembly located on the other side of the spindle assembly. The display unit is disposed on the first housing, the second housing, and the hinge mechanism, and is fixed to the first housing and the second housing.

13. The electronic device of claim 12, wherein, When the linkage mechanism includes a first support plate and the spindle assembly includes a second support plate, in the unfolded state, the first support plate, the second support plate, the first housing, and the second housing substantially continuously support the display unit.

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