Rotating shaft device and electronic equipment
By designing a combination of a high-pair mechanism and roller slide in the pivot device, the problem of synchronous flipping and stable support of the pivot device in foldable electronic devices was solved, achieving stable folding and unfolding, optimizing the component layout, enhancing structural reliability, and preventing damage to the flexible display screen.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2026-03-10
AI Technical Summary
Existing hinge devices are difficult to use in foldable electronic devices to achieve synchronous flipping and stable support, resulting in reduced structural reliability. In particular, flexible displays are prone to damage during drop impacts.
A rotating shaft device is designed, including a base, a first rotating mechanism and a second rotating mechanism. Through the linkage of a first trajectory rotating component, a first synchronous rotating component and a first driving component, a high-pair mechanism is formed to ensure the uniqueness and reliability of the motion trajectory. Furthermore, the combination of rollers and slides optimizes the size of the parts and the space occupied.
It achieves stable folding and unfolding of the pivot device, avoids large displacement of the driving components during movement, enhances structural stability, reduces the space occupied by parts, and prevents damage to the flexible display screen when dropped.
Smart Images
Figure CN121630883A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of folding structure technology, specifically to a pivot device and electronic device. Background Technology
[0002] With the continuous development of display technology, various types of electronic devices have been launched. Foldable electronic devices, which combine a small overall size with a large display screen, are increasingly popular. However, to meet the folding requirements of electronic devices, the key lies in the rational design of the hinge mechanism. To achieve synchronous flipping and stable support within a limited space, multiple different movable components are often required. The movement trajectories of these movable components are not unique, and the direction of movement of the electronic device's casing is generally consistent with the direction of the force exerted by a drop impact, which reduces the structural reliability in the folded state. Summary of the Invention
[0003] On one hand, this application provides a rotating shaft device, including a base, a first rotating mechanism, and a second rotating mechanism. The first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base so that the rotating shaft device has a folded state and an unfolded state. The first rotating mechanism includes a first trajectory rotating member, a first synchronous rotating member, and a first driving member. One end of the first trajectory rotating member is rotatably connected to the base around a first fixed rotation axis, and the other end is rotatably or slidably connected to the first driving member. The first synchronous rotating member is rotatably connected to the base around a first fixed synchronous axis. A first roller and a second roller are provided between the first synchronous rotating member and the first driving member. The first synchronous rotating member is tactilely connected to the first driving member through the first roller, and the first synchronous rotating member is tactilely connected to the first driving member through the second roller. The first fixed rotation axis, the first fixed synchronous axis, the axis of the first roller, and the axis of the second roller are parallel to each other and do not coincide.
[0004] On the other hand, embodiments of this application provide an electronic device, including a first housing, a second housing, a flexible display screen, and the aforementioned rotating shaft device, wherein the first housing is connected to the first rotating mechanism, the second housing is connected to the second rotating mechanism, and the flexible display screen continuously covers the first housing, the base, and the second housing.
[0005] The beneficial effects of the embodiments of this application are as follows:
[0006] 1. The rotating shaft device provided in this application embodiment can not only be folded, but also move according to a preset folding trajectory to obtain the desired folding shape. The first trajectory rotating component, the first synchronous rotating component, the first driving component and the base are connected to form a movable mechanism with a planar degree of freedom of 1, which can realize the uniqueness and reliability of the movement trajectory of the first trajectory rotating component, the first synchronous rotating component and the first driving component.
[0007] 2. When the first driving member rotates relative to the base, it drives the first trajectory rotating member and the first synchronous rotating member to rotate relative to the base respectively. During the movement, the first trajectory rotating member and the first synchronous rotating member restrain each other to avoid the first driving member from undergoing a large displacement instantaneously relative to the first trajectory rotating member and the first synchronous rotating member.
[0008] 3. The first synchronous rotating component can be rolledly connected to the first driving component through the first roller and the second roller respectively, thereby forming two interconnected high-pair mechanisms. The high-pair mechanism has a high degree of flexibility, which can make the trajectory of the relative motion between the first synchronous rotating component and the first driving component more flexible, thereby optimizing the size of the first synchronous rotating component and the first driving component and reducing the space occupied by the components. Attached Figure Description
[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0010] Figure 1 These are schematic diagrams of the electronic devices in some embodiments of this application;
[0011] Figure 2 yes Figure 1 A schematic diagram of the rotating shaft device in the embodiment;
[0012] Figure 3 yes Figure 2 A schematic diagram of the structure of the first rotating mechanism in the embodiment;
[0013] Figure 4 yes Figure 3 An exploded view of the first rotating structure in the embodiment;
[0014] Figure 5 yes Figure 2 A simplified kinematic diagram of the first rotating mechanism in the embodiment;
[0015] Figure 6 yes Figure 2 A schematic diagram illustrating the connection relationship between the first driving component and the first synchronous rotating component in the embodiment;
[0016] Figure 7 This is a schematic diagram of the connection relationship between the first driving member and the first synchronous rotating member in another embodiment;
[0017] Figure 8 This is a simplified kinematic diagram of the first rotating mechanism in another embodiment;
[0018] Figure 9 This is a schematic diagram of the structure of the first synchronous rotating component in another embodiment;
[0019] Figure 10 This is a partially exploded schematic diagram of the first rotating mechanism in another embodiment;
[0020] Figure 11 yes Figure 2 A schematic diagram of the rotating shaft device at point AA in the embodiment;
[0021] Figure 12 yes Figure 2 A schematic diagram of the rotating shaft device at BB in the embodiment; Detailed Implementation
[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.
[0023] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.
[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0025] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device in some embodiments of this application. This application provides an electronic device including a first housing 41a, a second housing 41b, a pivot device, and a flexible display screen 500. The first housing 41a and the second housing 41b are rotatably connected by the pivot device. The flexible display screen 500 can continuously cover the surfaces of the first housing 41a and the second housing 41b. When the first housing 41a and the second housing 41b are folded or unfolded with the pivot device, the flexible display screen 500 can be bent or flattened along with the first housing 41a and the second housing 41b.
[0026] The aforementioned electronic devices include, but are not limited to, mobile terminals such as mobile phones, tablets, laptops, PDAs, personal computers (PCs), personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, and pedometers, as well as fixed terminals such as digital TVs and desktop computers. This embodiment is only illustrative when the electronic device is a mobile phone. Of course, in other embodiments, the electronic device can be of other types, and should also fall within the protection scope of this application.
[0027] Furthermore, the aforementioned hinge device is a folding device capable of relative rotation to achieve folding and unfolding. The hinge device provided in this embodiment can be applied to a wide variety of fields, such as door locks, vehicles, machinery, and electronic products. This embodiment only illustrates the application of the hinge device in a foldable electronic device within the field of electronic products.
[0028] In some embodiments, the rotating shaft device includes a base 100, a first rotating mechanism 200a, and a second rotating mechanism 200b. The first rotating mechanism 200a and the second rotating mechanism 200b are rotatably connected to opposite sides of the base 100 so that the rotating shaft device has a folded state and an unfolded state.
[0029] It is understood that in this embodiment, the first rotating mechanism 200a and the second rotating mechanism 200b may be arranged symmetrically or asymmetrically with respect to the base 100. For ease of description, this application mainly describes the first rotating mechanism 200a and the second rotating mechanism 200b as symmetrically arranged. In the following embodiments, the specific arrangement of the first rotating mechanism 200a and the connection relationship between the first rotating mechanism 200a and the base 100 are mainly used as examples to describe the rotating shaft device, while the second rotating mechanism 200b can be arranged with reference to the first rotating mechanism 200a.
[0030] The base 100 is the fundamental structural component of the rotating shaft device, primarily serving a supporting and mounting function, allowing other structural components of the rotating shaft device to be mounted on the base 100. Furthermore, in some embodiments, the base 100 can also support the flexible display screen 500. This embodiment does not limit the shape, structure, material, or other parameters of the base 100, as long as it provides an assembly base for other structural components. The flexible display screen 500 includes, but is not limited to, various flexible components, various rigid components, or other parts.
[0031] It is worth mentioning that in some scenarios, multiple first rotating mechanisms 200a and second rotating mechanisms 200b can be provided, and multiple first rotating mechanisms 200a and second rotating mechanisms 200b can all use the same base 100 as the supporting component to improve the integration of the rotating shaft device; in other scenarios, the number of first rotating mechanisms 200a, second rotating mechanisms 200b and base 100 is the same, so that each first rotating mechanism 200a and second rotating mechanism 200b uses the corresponding base 100 as the supporting component.
[0032] Please see Figure 2 as well as Figure 3 , Figure 2 yes Figure 1 A schematic diagram of the rotating shaft device in the embodiment. Figure 3 yes Figure 2 A schematic diagram of the structure of the first rotating mechanism in the embodiment. The first rotating mechanism 200a includes a first trajectory rotating member 21a, a first synchronous rotating member 22a, and a first driving member 24a, wherein,
[0033] One end of the first trajectory rotating member 21a is rotatably connected to the base 100 around the first fixed rotation axis 201a, and the other end is slidably connected to the first driving member 24a. A first sliding groove 241a and a first slider 212a are provided between the first driving member 24a and the first trajectory rotating member 21a. The first sliding groove 241a is provided between one of the first driving member 24a and the first trajectory rotating member 21a, and the first slider 212a is provided between the other of the first driving member 24a and the first trajectory rotating member 21a. This embodiment only takes the first slide groove 241a being set on the first driving member 24a as an example. In this embodiment, the first slide groove 241a is a straight slide groove. The first driving member 24a may include a first inner side 245a and a first outer side 246a arranged opposite to each other. The first inner side 245a may be the side close to the flexible display screen 500. The first slide groove 241a may extend from the first inner side 245a toward the first outer side 246a, or from the first outer side 246a toward the first inner side 245a.
[0034] The first synchronous rotating member 22a is rotatably connected to the base 100 around the first fixed synchronous axis 202a. A first roller 221a and a second roller 222a are provided between the first synchronous rotating member 22a and the first driving member 24a. The first synchronous rotating member 22a is rotatably connected to the first driving member 24a through the first roller 221a, and the first synchronous rotating member 22a is rotatably connected to the first driving member 24a through the second roller 222a. A first track groove 242a and a second track groove 243a are also provided between the first synchronous rotating member 22a and the first driving member 24a. The first roller 221a is provided in one of the first synchronous rotating member 22a and the first driving member 24a, and the first track groove 242a is provided in the other of the first synchronous rotating member 22a and the first driving member 24a. Similarly, the second roller 222a is provided in one of the first synchronous rotating member 22a and the first driving member 24a, and the second track groove 243a is provided in the other of the first synchronous rotating member 22a and the first driving member 24a. In this embodiment, taking the example that both the first roller 221a and the second roller 222a are disposed on the first synchronous rotating member 22a, the first track groove 242a and the second track groove 243a are disposed on the first driving member 24a. The extension directions of the first track groove 242a and the second track groove 243a are not parallel to the vertical direction. The first roller 221a can be inserted into the first track groove 242a and slide within the first track groove 242a and rotate about the axis of the first roller 221a. The second roller 222a can be inserted into the second track groove 243a and slide within the second track groove 243a and rotate about the axis of the second roller 222a. That is, the first roller 221a and the second roller 222a can roll within the first track groove 242a and the second track groove 243a respectively.
[0035] The axes of the first fixed rotation axis 201a, the first fixed synchronization axis 202a, the first roller 221a, and the second roller 222a are parallel to each other and do not coincide.
[0036] Please see Figure 2 Similarly, one end of the second trajectory rotating member 21b is rotatably connected to the base 100 about the second fixed rotation axis 201b, and the other end is slidably connected to the second driving member 24b; the second synchronous rotating member 22b is rotatably connected to the base 100 about the first fixed synchronous axis 202a. The second synchronous rotating member 22b is provided with a third roller 221b and a fourth roller 222b. The second synchronous rotating member 22b is rotatably connected to the second driving member 24b through the third roller 221b, and the second synchronous rotating member 22b is rotatably connected to the second driving member 24b through the fourth roller 222b. The axes of the second fixed rotation axis 201b, the second fixed synchronous axis 202b, the third roller 221b, and the fourth roller 222b are parallel to each other and do not coincide.
[0037] It is important to note that the rotation mentioned above can be understood as two moving parts moving in a circle around a rotation axis, while sliding can be understood as two moving parts moving in parallel, with only changes in displacement and no changes in angle. However, the fact that two moving parts can both slide and rotate means that they experience both changes in displacement and changes in angle; this combination of sliding and rotation can also be called rolling.
[0038] Please see Figure 5 , Figure 5 yes Figure 2 A simplified kinematic diagram of the first rotating mechanism in this embodiment. In this embodiment, when the folding device is in motion, the movable mechanism is composed of the base 100, the first trajectory rotating member 21a, the first synchronous rotating member 22a, and the first driving member 24a. The base 100 and the first trajectory rotating member 21a, the base 100 and the first synchronous rotating member 22a, and the first driving member 24a and the first trajectory rotating member 21a respectively form planar lower pair fits with 1 degree of freedom. The first driving member 24a and the first synchronous rotating member 22a form two planar higher pair fits with 2 degrees of freedom each through the first roller 221a and the second roller 222a. Taking the base 100 as the fixed component, this movable mechanism has 3 movable components, 3 planar lower pair fits with 1 degree of freedom, and 2 planar higher pair fits with 2 degrees of freedom. According to the degree of freedom calculation formula, the degrees of freedom of this movable mechanism are:
[0039] F=3n-2PL-Ph=3×3-2×3-2=1
[0040] Where n is the number of moving components, PL is the number of lower pair constraints, and Ph is the number of higher pair constraints. Since the moving mechanism has 1 degree of freedom, it can ensure the uniqueness and reliability of the motion trajectory of each moving component.
[0041] Based on the above connection relationship, the rotating shaft device can not only be folded, but also move according to a preset folding trajectory to obtain the desired folding shape. When the first driving member 24a rotates relative to the base 100, it drives the first trajectory rotating member 21a and the first synchronous rotating member 22a to rotate relative to the base 100 respectively. During the movement, the first trajectory rotating member 21a and the first synchronous rotating member 22a restrain each other to prevent the first driving member 24a from undergoing a large instantaneous displacement relative to the first trajectory rotating member 21a and the first synchronous rotating member 22a. At the same time, in the folded state, the first sliding groove 241a is not parallel to the vertical direction, and the first trajectory groove 242a and the second trajectory groove 243a are also not parallel to the vertical direction. Therefore, the first trajectory rotating member 21a and the first synchronous rotating member 22a both provide upward support for the first driving member 24a, which can prevent the first driving member 24a from moving downward in the folded state and ensure the structural stability of the rotating shaft device.
[0042] The first synchronous rotating component 22a can be rolledly connected to the first driving component 24a through the first roller 221a and the second roller 222a, thereby forming two interconnected high-pair mechanisms. The high-pair mechanisms have higher flexibility, which allows for a more flexible design of the relative motion trajectory between the first synchronous rotating component 22a and the first driving component 24a, thereby optimizing the size of the components and reducing their space occupation.
[0043] In some embodiments, the first track groove 242a and the second track groove 243a both extend from the end of the first drive member 24a near the base 100 in a direction away from the base 100. The projections of the first track groove 242a and the second track groove 243a onto the first plane C1 are not parallel. The first plane C1 is a reference plane perpendicular to the first fixed synchronous axis 202a.
[0044] In this embodiment, the first synchronous rotating member 22a is connected to the first driving member 24a through two higher pair mechanisms. The projections of the first trajectory groove 242a and the second trajectory groove 243a on the first driving member 24a onto the first plane C1 are not parallel, allowing the first driving member 24a to slide and rotate relative to the first synchronous rotating member 22a along a preset trajectory. Furthermore, the motion trajectory between the first synchronous rotating member 22a and the first driving member 24a is unique. It is understood that if the first synchronous rotating member 22a were only connected to the first driving member 24a via the first roller 221a and the first trajectory groove 242a, with the first driving member 24a as a fixed component, then the first roller 221a on the first synchronous rotating member 22a could slide within the first trajectory groove 242a and rotate at any position within the first trajectory groove 242a. In other words, the motion trajectory of the first synchronous rotating member 22a relative to the first driving member 24a would not be unique. In this embodiment, in addition to the first roller 221a, a second roller 222a is also provided. The first synchronous rotating member 22a is rolledly connected to the first driving member 24a through the second roller 222a. The first synchronous rotating member 22a and the first driving member 24a are connected by two high-pair mechanisms, so that the motion trajectory of the first synchronous rotating member 22a and the first driving member 24a is unique. Therefore, when the first roller 221a slides in the first track groove 242a, it can simultaneously rotate at a preset angle in the first track groove 242a.
[0045] Furthermore, if the projections of the first track groove 242a and the second track groove 243a onto the first plane C1 are parallel to each other, it can be understood that the first roller 221a and the second roller 222a are connected to form a rectangular slider structure, and the actual rotation angle of the first roller 221a and the second roller 222a is 0. Therefore, in this embodiment, by setting the projections of the first track groove 242a and the second track groove 243a onto the first plane C1 to be non-parallel, the first roller 221a and the second roller 222a can each rotate at a preset angle, and the rotation angle is not 0.
[0046] Please see Figure 6 , Figure 6 yes Figure 2A schematic diagram illustrating the connection relationship between the first driving member and the first synchronous rotating member in this embodiment. In some embodiments, the distance from the first roller 221a to the base 100 is greater than the distance from the second roller 222a to the base 100. In the unfolded state, the first roller 221a is located at the first unfolded position 2421a of the first track groove 242a, and the second roller 222a is located at the second unfolded position 2431a of the second track groove 243a. In the folded state, the first roller 221a is located at the first folded position 2422a of the first track groove 242a, and the second roller 222a is located at the second folded position 2432a of the second track groove 243a. In the unfolded state, the angle of inclination of the shortest line connecting the first unfolded position 2421a and the second unfolded position 2431a projected onto the first plane C1 relative to the second plane C2 is greater than the angle of inclination of the shortest line connecting the first folded position 2422a and the second folded position 2432a projected onto the first plane C1 relative to the second plane C2. Figure 6 In the case where α1 > α2, the second plane C2 is a reference plane perpendicular to the thickness direction of the base 100 and located at the bottom of the base 100. Figure 6 The rotation direction R is counterclockwise. That is, when the rotating shaft device rotates from the unfolded state to the folded state, the slope of the shortest line connecting the first roller 221a and the second roller 222a decreases. Then the first synchronous rotating member 22a rotates clockwise relative to the first driving member 24a by a certain angle, which means the first driving member 24a rotates counterclockwise relative to the first synchronous rotating member 22a by a certain angle.
[0047] As shown in Figure 6, when the rotating shaft device moves from the unfolded state to the folded state, the first roller 221a moves from the first unfolded position 2421a to the first folded position 2422a, and the second roller 222a moves from the second unfolded position 2431a to the second folded position 2432a. Since α1>α2, the end of the first driving member 24a away from the base 100 has a larger rotation range than the end of the first driving member 24a close to the base 100. The first driving member 24a can rotate counterclockwise by a certain angle relative to the first roller 221a and the second roller 222a.
[0048] When the rotating shaft device rotates from the unfolded state to the folded state, if the first synchronous rotating member 22a rotates counterclockwise by 90° relative to the base 100, in this embodiment, the first driving member 24a can further rotate counterclockwise by a certain angle relative to the first synchronous rotating member 22a on the basis of rotating 90° relative to the base 100 along with the first synchronous rotating member 22a, then the rotation angle of the first driving member 24a relative to the base 100 is greater than 90°. On the contrary, if the rotation angle of the first driving member 24a relative to the base 100 is 90°, the rotation angle of the first synchronous rotating member 22a is less than 90°. In this application, when the rotating shaft device rotates from the unfolded state to the folded state, the required rotation angle of the first driving member 24a is 90°, so the required rotation angle of the first synchronous rotating member 22a is less than 90°. Actually, the rotation angle of the first synchronous rotating member 22a is 88°. The larger the rotation angle of the first synchronous rotating member 22a, the smaller the gap between the first synchronous rotating member 22a and the flexible display screen 500 in the folded state, and it is easier for the first synchronous rotating member 22a to impact the flexible display screen 500 during a drop impact, resulting in problems with the flexible display screen 500. In this embodiment, when the rotation angle of the first driving member 24a is 90° when the rotating shaft device switches between the folded state and the unfolded state, the rotation angle required for the first synchronous rotating member 22a can be designed to be smaller, which can increase the gap between the first synchronous rotating member 22a and the flexible display screen 500 in the folded state and avoid the first synchronous rotating member 22a from impacting the flexible display screen 500 during a drop impact.
[0049] Please continue to refer to Figure 6 , optionally, the first track groove 242a is a linear chute, and the second track groove 243a is a linear chute. In this embodiment, in the unfolded state, the distance from the end of the first track groove 242a close to the base 100 to the second plane C2 is less than the distance from the end of the first track groove 242a far from the base 100 to the second plane C2, that is, H3 < H4, and the distance from the end of the second track groove 243a close to the base 100 to the second plane C2 is less than the distance from the end of the second track groove 243a far from the base 100 to the second plane C2, that is, H1 < H2. The first track groove 242a and the second track groove 243a can be two independent chutes respectively, or the first track groove 242a and the second track groove 243a can be connected to form an integral special-shaped chute.
[0050] Please refer to Figure 7 , Figure 7 is a schematic diagram of the connection relationship between the first driving member and the first synchronous rotating member in another embodiment. Optionally, the first track groove 242a is an arc-shaped chute, and the second track groove 243a is a linear chute. In this embodiment, in the unfolded state, the second track groove 243a extends in the horizontal direction, and the center of the first track groove 242a is located on the side of the first track groove 242a facing the base 100.
[0051] Optionally, the first track groove 242a is an arc-shaped slide groove, and the second track groove 243a is an arc-shaped slide groove. The center of the first track groove 242a is located on the side of the first track groove 242a facing the base 100, and the center of the second track groove 243a is located on the side of the second track groove 243a facing the base 100. The first track groove 242a and the second track groove 243a can be tangent as shown in Figure 7, or they can be intersecting or disjoint.
[0052] Please see Figure 8 , Figure 8 This is a simplified kinematic diagram of the first rotating mechanism in another embodiment. In some embodiments, the end of the first trajectory rotating member 21a away from the base 100 is rotatably connected to the first driving member 24a. Exemplarily, the first trajectory rotating member 21a and the first driving member 24a are rotatably connected via a first movable shaft 203a, where the first movable shaft 203a, the first fixed rotation axis 201a, and the first fixed synchronization axis 202a are parallel to each other and do not coincide. Both the first trajectory rotating member 21a and the first driving member 24a are provided with through holes, and the first movable shaft 203a passes through the through holes of both the first trajectory rotating member 21a and the first driving member 24a to achieve the rotatable connection between them. In this embodiment, the first trajectory rotating member 21a and the first driving member 24a also employ a low-pair fit, and the first rotating mechanism 200a has one degree of freedom.
[0053] Similarly, the end of the second trajectory rotator 21b away from the base 100 is rotatably connected to the second drive member 24b.
[0054] Please see Figure 3 In some embodiments, the first roller 221a and the second roller 222a are respectively disposed on opposite sides of the first synchronous rotating member 22a, perpendicular to the first fixed synchronous axis 202a. Optionally, the first roller 221a and the second roller 222a can be fixedly connected to the first synchronous rotating member 22a; alternatively, the first roller 221a and the second roller 222a are both cylindrical, and both can be rotatably connected to the first synchronous rotating member 22a, thereby making the relative movement of the first synchronous rotating member 22a and the first driving member 24a smoother.
[0055] Please see Figure 9 , Figure 9This is a schematic diagram of the structure of the first synchronous rotating component in another embodiment. In the embodiment where the first roller 221a and the second roller 222a are fixedly connected to the first synchronous rotating component 22a, the first roller 221a is connected to a first reinforcing plate 223a. The first reinforcing plate 223a is inserted into the first track groove 242a and maintains a gap with it. It can be understood that the first roller 221a rotates only a small range within the first track groove 242a. Therefore, it is sufficient that a portion of the annular side of the first roller 221a can roll against the wall of the first track groove 242a. The first reinforcing plate 223a is connected to the portion of the annular side of the first roller 221a that does not roll against the first track groove 242a, and the gap between the first reinforcing plate 223a and the first track groove 242a allows the first reinforcing plate 223a to have a certain amount of room to move within the first track groove 242a. Thus, the first reinforcing plate 223a will not affect the rotation of the first roller 221a within the first track groove 242a, and the connection between the first reinforcing plate 223a and the first roller 221a can improve the strength of the first roller 221a.
[0056] Similarly, the second roller 222a is connected to a second reinforcing plate 224a, which is inserted into the second track groove 243a and maintains a gap with it. The second roller 222a rotates only a small range within the second track groove 243a, so only a portion of the annular side of the second roller 222a needs to roll against the wall of the second track groove 243a. The second reinforcing plate 224a is connected to the portion of the annular side of the second roller 222a that does not roll against the second track groove 243a, and the gap between the second reinforcing plate 224a and the second track groove 243a allows the second reinforcing plate 224a to have a certain amount of room to move within the second track groove 243a.
[0057] Please see Figure 10 , Figure 10This is a partially exploded view of the first rotating mechanism in another embodiment. In some embodiments, the first roller 221a and the second roller 222a are disposed on the same side of the first synchronous rotating member 22a, perpendicular to the first fixed synchronous axis 202a. A third track groove 244a is provided on the first driving member 24a. The first roller 221a and the second roller 222a are inserted into the third track groove 244a. The first track groove 242a and the second track groove 243a extend from the end of the first synchronous rotating member 22a near the base 100 in a direction away from the base 100 and are connected. The reinforcing plate 223a and the second reinforcing plate 224a are connected to form an integral structure. The first reinforcing plate 223a can move within the first track groove 242a and the second track groove 243a, and there is a gap between the first reinforcing plate 223a and the first track groove 242a and the second track groove 243a. The second reinforcing plate 224a can also move within the first track groove 242a and the second track groove 243a, and there is a gap between the second reinforcing plate 224a and the first track groove 242a and the second track groove 243a. Furthermore, there are two first rollers 221a, which are symmetrically arranged on opposite sides of the first synchronous rotating member 22a; there are also two second rollers 222a, which are symmetrically arranged on opposite sides of the first synchronous rotating member 22a, perpendicular to the first fixed synchronous axis 202a.
[0058] Please see Figure 11 , Figure 11 yes Figure 2 A schematic diagram of the rotating shaft device at point AA in the embodiment. In some embodiments, a first arc-shaped groove 11a is provided on the base 100, and a first arc-shaped rotating block 211a is provided at one end of the first trajectory rotating member 21a that is rotatably connected to the base 100. The first arc-shaped rotating block 211a is housed within the first arc-shaped groove 11a and can rotate along the arc surface of the first arc-shaped groove 11a. The axis corresponding to the first arc-shaped groove 11a is the first fixed rotation axis 201a. The axis of the first fixed rotation axis 201a can be located inside or outside the base 100, for example, the axis of the first fixed rotation axis 201a is located above the base 100. When the first rotating mechanism 200a rotates from the unfolded state to the folded state, the first arc-shaped rotating block 211a moves in the direction of sliding out of the first arc-shaped groove 11a, thereby reducing the size of the portion of the first arc-shaped rotating block 211a corresponding to the inside of the first arc-shaped groove 11a.
[0059] Please see Figure 12 , Figure 12 yes Figure 2The schematic diagram of the rotating shaft device at BB in the embodiment is shown. The first synchronous rotating member 22a is rotatably connected to the base 100 in the form of a solid shaft. In this embodiment, a first fixed synchronous shaft is fixedly connected to the base 100. The first fixed synchronous shaft is cylindrical and has the first fixed synchronous axis 202a as its axis. The first synchronous rotating member 22a is sleeved on the first fixed synchronous shaft and rotates around the first fixed synchronous shaft.
[0060] It is understandable that the first trajectory rotating component 21a can also be connected to the base 100 via a solid shaft, or the first synchronous rotating component 22a can also be connected to the base 100 in the form of an arc groove and an arc rotating block.
[0061] Similarly, the base 100 is provided with a second arc-shaped groove 11b, and the end of the second trajectory rotating member 21b that is rotatably connected to the base 100 is provided with a second arc-shaped rotating block 211b. The second arc-shaped rotating block 211b is housed within the second arc-shaped groove 11b and can rotate along the arc surface of the second arc-shaped groove 11b. The axis corresponding to the second arc-shaped groove 11b is the second fixed rotation axis 201b. The axis of the second fixed rotation axis 201b can be located inside or outside the base 100, for example, the axis of the second fixed rotation axis 201b is located above the base 100. When the second rotating mechanism 200b rotates from the unfolded state to the folded state, the second arc-shaped rotating block 211b moves in the direction of sliding out of the second arc-shaped groove 11b, thereby reducing the size of the portion of the second arc-shaped rotating block 211b corresponding to the inside of the second arc-shaped groove 11b.
[0062] Combining the implementation style of the first trajectory rotating component 21a adopting an arc-shaped groove and an arc-shaped rotating block, since the first trajectory rotating component 21a and the first synchronous rotating component 22a are driven to rotate synchronously by the first driving component 24a, when the required rotation angle of the first synchronous rotating component 22a decreases, the required rotation angle of the first trajectory rotating component 21a also decreases. In this way, the overlap between the first trajectory rotating component 21a and the base 100 can be increased in the folded state, thereby improving the stability of the structure.
[0063] Please refer to the previous document. Figure 3 as well as Figure 4In some embodiments, a first connecting member 23a is provided between the first trajectory rotating member 21a and the first synchronous rotating member 22a. The first connecting member 23a includes a first guiding part 231a and a first mating part 232a. The first guiding part 231a is fixedly connected to one of the first trajectory rotating member 21a and the first synchronous rotating member 22a, and the first mating part 232a is connected to the other of the first trajectory rotating member 21a and the first synchronous rotating member 22a. The first mating part 232a and the first guiding part 231a are in a rolling connection. The first connecting member 23a includes a first guide groove 2311a and a first slide rod 2321a in a rolling fit. The first guide groove 2311a is fixedly disposed at one end of the first trajectory rotating member 21a facing the first synchronous rotating member 22a, and the first slide rod 2321a is disposed on the first synchronous rotating member 22a and inserted into the first guide groove 2311a. In this embodiment, the first slide bar 2321a is cylindrical. The first slide bar 2321a can be fixedly connected to the first synchronous rotating member 22a, or it can be rotatably connected to the first synchronous rotating member 22a.
[0064] In some scenarios, the first guide groove 2311a can also be fixedly set at one end of the first synchronous rotating member 22a facing the first trajectory rotating member 21a, and the first slide rod 2321a can be fixedly or rotatably set on the first trajectory rotating member 21a and inserted into the first guide groove 2311a.
[0065] Similarly, a second connecting member 23b is provided between the second trajectory rotating member 21b and the second synchronous rotating member 22b. The second connecting member 23b includes a second guide portion and a second mating portion 232b. The second guide portion is fixedly connected to one of the second trajectory rotating member 21b and the second synchronous rotating member 22b, and the second mating portion 232b is connected to the other of the second trajectory rotating member 21b and the second synchronous rotating member 22b. The second mating portion 232b and the second guide portion are slidably and rotatably connected.
[0066] By setting the first connector 23a, the degree of coordination between the first trajectory rotating member 21a and the first synchronous rotating member 22a can be improved. In the folded state, the first connector 23a can also make the first trajectory rotating member 21a and the first synchronous rotating member 22a mutually restrain each other, so as to avoid the first trajectory rotating member 21a or the first synchronous rotating member 22a from undergoing large displacement instantaneously when subjected to a drop impact.
[0067] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.
Claims
1. A rotating shaft device characterized by comprising: The first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base to make the rotating shaft device have a folded state and an unfolded state, the first rotating mechanism comprises a first track rotating member, a first synchronous rotating member, and a first driving member, wherein, one end of the first track rotating member is rotatably connected to the base about a first fixed rotating axis, and the other end is rotatably or slidably connected to the first driving member; the first synchronous rotating member is rotatably connected to the base about a first fixed synchronous axis, first and second rollers are arranged between the first synchronous rotating member and the first driving member, the first synchronous rotating member is rotatably connected to the first driving member through the first roller, and the first synchronous rotating member is rotatably connected to the first driving member through the second roller; the first fixed rotating axis, the first fixed synchronous axis, the axis of the first roller, and the axis of the second roller are parallel to each other and do not coincide.
2. The rotational shaft device according to claim 1, characterized by the first driving member is provided with first and second track grooves, the first roller is rotatably connected to the first track groove, the second roller is rotatably connected to the second track groove, the first and second track grooves are both extended away from the base from one end of the first driving member close to the base, and the projections of the first and second track grooves on a first plane are not parallel, the first plane being a reference plane perpendicular to the first fixed synchronous axis.
3. The rotational shaft device according to claim 2, characterized by the distance from the first roller to the base is greater than the distance from the second roller to the base; in the unfolded state, the first roller is located at a first unfolded position of the first track groove, and the second roller is located at a second unfolded position of the second track groove; in the folded state, the first roller is located at a first folded position of the first track groove, and the second roller is located at a second folded position of the second track groove; in the unfolded state, the inclination angle of the shortest line connecting the first unfolded position and the second unfolded position in the first plane projection with respect to a second plane is greater than the inclination angle of the shortest line connecting the first folded position and the second folded position in the first plane projection with respect to the second plane, the second plane being a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base.
4. A pivot device according to claim 2 or 3, characterised in that the first and second rollers are respectively arranged on opposite sides of the first synchronous rotating member perpendicular to the first fixed synchronous axis.
5. The rotational shaft device according to claim 4, characterized by the first roller is connected with a first reinforcing plate, the first reinforcing plate is inserted into the first track groove and maintains a gap with the first track groove; the second roller is connected with a second reinforcing plate, the second reinforcing plate is inserted into the second track groove and maintains a gap with the second track groove.
6. A rotational coupling device according to claim 2 or 3, wherein the first and second rollers are arranged on the same side of the first synchronous rotating member perpendicular to the first fixed synchronous axis.
7. The rotational shaft device according to claim 6, characterized by two first rollers are symmetrically arranged on opposite sides of the first synchronous rotating member perpendicular to the first fixed synchronous axis; The second roller is provided with two, two of the second roller is symmetrically arranged on the first fixed synchronous axis perpendicular to the first fixed synchronous axis and opposite sides.
8. The rotational coupling device of claim 1, wherein, The first track rotating member and the first driving member are provided with a first sliding block and a first sliding groove, the first sliding block is arranged on one of the first track rotating member and the first driving member, and the first sliding groove is arranged on the other one, and the first sliding block and the first sliding groove are in sliding fit.
9. The rotational coupling device of claim 1, wherein, The first track rotating member and the first driving member are connected by a first movable shaft, the first movable shaft, the first fixed rotating axis and the first fixed synchronous axis are parallel to each other and do not coincide.
10. The rotational coupling device of claim 1, wherein, The first track rotating member and the first synchronous rotating member are provided with a first connecting member, the first connecting member includes a first guide part and a first matching part, the first guide part is fixedly connected to one of the first track rotating member and the first synchronous rotating member, the first matching part is connected to the other one of the first track rotating member and the first synchronous rotating member, and the first matching part and the first guide part are in rolling connection.
11. The rotational coupling device of claim 9, wherein, The first connecting member includes a first guide groove and a first sliding rod in rolling fit, the first guide groove is fixedly arranged on one end of the first track rotating member towards the first synchronous rotating member, and the first sliding rod is arranged on the first synchronous rotating member and inserted into the first guide groove.
12. The rotational coupling device of claim 1, wherein, The second rotating mechanism includes a second track rotating member, a second synchronous rotating member and a second driving member, wherein, One end of the second track rotating member is rotatably connected to the base around a second fixed rotating axis, and the other end is rotatably or slidably connected to the second driving member; The second synchronous rotating member is rotatably connected to the base around a first fixed synchronous axis, and the second synchronous rotating member and the second driving member are provided with a third roller and a fourth roller, the second synchronous rotating member is rotatably connected to the second driving member through the third roller, and the second synchronous rotating member is rotatably connected to the second driving member through the fourth roller; The second fixed rotating axis, the second fixed synchronous axis, the axis of the third roller and the axis of the fourth roller are parallel to each other and do not coincide.
13. An electronic device, comprising: The first shell, the second shell, the flexible display screen and the rotating shaft device according to any one of claims 1-12 are included, wherein: The first shell and the first rotating mechanism are fixedly connected, the second shell and the second rotating mechanism are connected, and the flexible display screen continuously covers the first shell, the base and the second shell.