A rotating shaft mechanism and a foldable device

Abstract

The application provides a rotating shaft mechanism and a foldable device. The rotating shaft mechanism comprises a main shaft, a connecting rod, a fixing frame and a support plate. The main shaft is a fixed component, and the connecting rod, the fixing frame and the support plate are movable components, which together form a connecting rod slider mechanism. The connecting rod is slidingly installed on the fixing frame, the connecting rod is pivotally connected to the main shaft, and the two ends of the support plate are pivotally connected to the main shaft and the fixing frame respectively. When the fixing frame on the two sides of the main shaft rotates, the connecting rod and the support plate can be driven to rotate, so that the rotating shaft mechanism can be switched between an unfolded state and a closed state. The connecting rod slider mechanism in the rotating shaft mechanism has only three movable components, four low pairs and no high pair, so that the number of parts is small, the structure is simple, the reliability is good, and the cost is low. When the rotating shaft mechanism is switched to the closed state, the support plate on the two sides of the main shaft and the main shaft form a screen containing space to accommodate the water drop-shaped bending part of the flexible screen during folding. The rotating shaft mechanism, the first shell, the second shell and the flexible screen combine to form the foldable device.

Description

Technical Field

[0001] This application relates to the field of foldable device technology, and more particularly to a pivot mechanism and a foldable device. Background Technology

[0002] Foldable devices (such as foldable flexible screen phones) use a central hinge mechanism to unfold and fold the two housings. Based on the shape of the flexible screen in the closed state, the hinge mechanism is divided into U-shaped hinge mechanisms and teardrop-shaped hinge mechanisms. For example... Figure 1 As shown in (a), the U-shaped rotating shaft mechanism 10' has a relatively simple structure and low cost. However, when closed, there is a gap 21 between the two housings 20', resulting in a large maximum thickness L1 of the entire machine. This allows debris to easily enter the gap 21, potentially damaging the flexible screen 30'. Figure 1 As shown in (b), the teardrop-shaped rotating shaft mechanism 10 has a relatively complex structure and high cost. In the closed state, the two housings 20 are stacked, resulting in a relatively small overall thickness L2. Traditional teardrop-shaped rotating shaft mechanisms have more parts, a complex structure, and higher costs. Summary of the Invention

[0003] This application provides a rotating shaft mechanism and a foldable device, which solves the problem of traditional rotating shaft mechanisms having many parts and complex structures.

[0004] The embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a rotating shaft mechanism, including a main shaft, multiple connecting rods, pairs of fixed frames, and pairs of support plates. One or more connecting rods are respectively disposed on both sides of the main shaft along an axial direction perpendicular to the main shaft, with one end of each connecting rod pivotally connected to the main shaft. Each pair of fixed frames is respectively disposed on both sides of the main shaft along an axial direction perpendicular to the main shaft, with the fixed frame on the same side of the main shaft corresponding to a connecting rod, and the connecting rod slidably connected to the fixed frame corresponding to the connecting rod. Each pair of support plates is respectively disposed on both sides of the main shaft along an axial direction perpendicular to the main shaft, with the support plate on the same side of the main shaft corresponding to a fixed frame. One end of each support plate is pivotally connected to the main shaft, and the other end is pivotally connected to the fixed frame corresponding to the support plate. The connecting rods and support plates on the same side of the main shaft are spaced apart on their pivot axes on the main shaft. The fixed frames on both sides of the main shaft are rotatable relative to the main shaft, allowing the rotating shaft mechanism to switch between a flattened state and a closed state. During the process of the rotating shaft mechanism switching from the flat state to the closed state, the fixed frames on both sides of the main shaft rotate towards each other. The fixed frames drive the connecting rods and support plates corresponding to the fixed frames to rotate, so that the support plates on both sides of the main shaft form a screen space with the main shaft.

[0006] The rotating shaft mechanism provided in this application embodiment uses a main shaft as a fixed component and connecting rods, a fixed frame, and a support plate as movable components, collectively forming a connecting rod-slider mechanism. The connecting rod is slidably mounted on the fixed frame and pivotally connected to the main shaft. Both ends of the support plate are pivotally connected to the main shaft and the fixed frame, respectively. When the fixed frames located on both sides of the main shaft rotate, they can drive the connecting rod and the support plate to rotate, realizing the switching of the rotating shaft mechanism between a flattened state and a closed state. This rotating shaft mechanism has only three movable components, a total of four lower pairs without the need for higher pairs, resulting in fewer parts, a simple structure, good reliability, and low cost. When the rotating shaft mechanism switches to the closed state, a screen-accommodating space is formed between the support plates on both sides of the main shaft and the main shaft to accommodate the teardrop-shaped bending portion of the flexible screen during folding.

[0007] In one alternative implementation, the spindle is a flat strip. The spindle has recesses for mounting related parts. The outer surface of the spindle may have a curved surface to improve the appearance of the shaft mechanism when applied to foldable devices.

[0008] In one alternative implementation, the connecting rod is configured as a straight rod or a rod with a certain curved shape. The connecting rod is configured with at least three connecting segments to satisfy the rotational connection between the connecting rod and the main shaft and the sliding connection between the connecting rod and the fixed frame. During the switching between the flattened and closed states of the rotating shaft mechanism, the connecting rod does not interfere with other components.

[0009] In one alternative implementation, the fixing frame is configured as a strip, which reliably fixes the fixing frame to the first housing and the second housing, enabling sliding connection between the fixing frame and the connecting rod, as well as rotational connection between the fixing frame and the support plate.

[0010] In one alternative implementation, the support plate extends axially along the main shaft, enabling the flattened support plate to effectively support the flexible screen. The support plate is rectangular.

[0011] In one alternative implementation, during the process of the rotating shaft mechanism switching from a closed state to a flattened state, the fixed frames located on both sides of the main shaft rotate in opposite directions. The fixed frames drive the connecting rods and support plates corresponding to the fixed frames to rotate, so that the support plates located on both sides of the main shaft are flush and can cover one side of the main shaft.

[0012] The support plates on both sides are flush with each other and cover one side of the main shaft, so that the support plates on both sides can support the corresponding area of ​​the flexible screen, without the need to set a main shaft support plate on the main shaft of the related technology to support the corresponding area of ​​the flexible screen, which simplifies the structure.

[0013] In one alternative implementation, the pivot axes of the connecting rods located on both sides of the main shaft are symmetrically arranged on both sides of the pivot axes of a pair of support plates on the main shaft.

[0014] A plane of symmetry is formed on the main shaft. The pivot axes of the two side support plates and the main shaft are positioned close to the plane of symmetry, while the pivot axes of the two side connecting rods and the main shaft are positioned away from the plane of symmetry. The support plates do not need to have clearance holes to avoid the connecting rods, so that the extended support plates on both sides can better support the corresponding parts of the flexible screen, improving the reliability of the flexible screen.

[0015] In one alternative implementation, when the rotating shaft mechanism is in the closed state, the connecting rod is located on the side of the support plate opposite to the accommodating screen space, and the distance between the pivot axes of the connecting rods on both sides of the main shaft is greater than the distance between the paired support plates near the main shaft.

[0016] By increasing the distance between the pivot axes of the connecting rods on both sides of the main shaft, the connecting rods in the closed rotating shaft mechanism are located on the outside of the corresponding support plate rather than on the side close to the screen space. The support plates that unfold on both sides can better support the corresponding parts of the flexible screen and improve the reliability of the flexible screen.

[0017] In one alternative implementation, the link and the spindle can be connected by a pivot or a virtual axis, both of which can achieve a rotational connection between the link and the spindle.

[0018] In one alternative implementation, the mounting bracket has a first sliding portion, and the connecting rod corresponding to the mounting bracket has a second sliding portion. The first and second sliding portions are slidably engaged, allowing the connecting rod to be slidably connected to the mounting bracket. A stable sliding connection between the mounting bracket and the connecting rod can be achieved through the slidable engagement of the first sliding portion of the mounting bracket and the second sliding portion of the connecting rod.

[0019] In one alternative implementation, the first sliding part is a guide groove on the fixed frame, and the second sliding part is a guide arm on the connecting rod, with the guide arm slidably mounted in the guide groove. Using a guide groove and guide arm facilitates molding and assembly, and enables a stable and reliable sliding connection between the fixed frame and the connecting rod.

[0020] In one alternative implementation, the first sliding part is a guide arm provided on the fixed frame, and the second sliding part is a guide groove provided on the connecting rod. The guide arm is slidably installed in the guide groove, which can also achieve a stable and reliable sliding connection between the fixed frame and the connecting rod.

[0021] In one alternative implementation, the support plate and the spindle can be connected by a virtual axis or a pivot, both of which can achieve a rotational connection between the support plate and the spindle.

[0022] In one alternative implementation, the support plate and the spindle are connected by a virtual axis. Each support plate has one or more first arc arms, and the spindle has one or more first arc grooves corresponding to the one or more first arc arms. The one or more first arc arms are slidably mounted in the one or more first arc grooves so that the support plate is pivotally connected to the spindle. The sliding engagement between the first arc arms of the support plate and the first arc grooves of the spindle enables a stable and reliable rotational connection between the support plate and the spindle, simplifying the structure and facilitating assembly.

[0023] In one alternative implementation, the first arcuate grooves on both sides of the spindle in the direction perpendicular to the spindle's axial direction can be offset along the spindle's axial direction, facilitating the formation of first arcuate grooves on the spindle that correspond to those on the two side support plates. Correspondingly, the first arcuate arms of the two side support plates are offset along the spindle's axial direction. Furthermore, the first arcuate grooves on both sides of the spindle in the direction perpendicular to the spindle's axial direction can also be positioned opposite each other.

[0024] In one alternative implementation, a first baffle can be provided at one end of the first arc arm, and a space for accommodating the first baffle can be provided on the main shaft, which can enhance the structural strength of the first arc arm and provide a limiting effect on the first arc arm along the main shaft axis during the sliding process of the first arc arm relative to the first arc groove.

[0025] In one alternative implementation, each support plate has a first arc groove, and the main shaft has a first arc arm. The first arc arm is slidably mounted on the first arc groove, which also enables the support plate to be pivotally connected to the main shaft.

[0026] In one alternative implementation, the support plate and the fixed frame can be connected by a virtual axis or a pivot, both of which can achieve a rotational connection between the support plate and the fixed frame.

[0027] In one alternative implementation, a virtual axis connection is established between the support plate and the fixing frame. Each support plate has one or more second arcuate arms, and the fixing frame has one or more second arcuate grooves corresponding to the one or more second arcuate arms. The one or more second arcuate arms are slidably mounted in the one or more second arcuate grooves to pivotally connect the support plate to the fixing frame. The sliding engagement between the second arcuate arms of the support plate and the second arcuate grooves of the fixing frame enables a stable and reliable rotational connection between the support plate and the fixing frame, simplifying the structure and facilitating assembly.

[0028] In one alternative implementation, a second baffle can be provided at one end of the second arc arm. The second baffle can enhance the structural strength of the second arc arm and provide a limiting effect on the second arc arm along the main axis during the sliding process of the second arc arm relative to the second arc groove.

[0029] In one alternative implementation, the fixture has a second arcuate groove, and each support plate has a second arcuate arm, which is slidably mounted in the second arcuate groove, thus enabling the support plate to be pivotally connected to the fixture.

[0030] In one alternative implementation, the rotating shaft mechanism further includes a synchronization component mounted on the main shaft, which enables the connecting rods located on both sides of the main shaft to rotate synchronously in opposite directions. The connecting rods, the fixing frame, and the support plate on both sides of the main shaft constitute two sets of connecting rod-slider mechanisms. The two sets of connecting rod-slider mechanisms move synchronously in opposite directions, so that when applied to foldable devices, the first housing and the second housing can be folded or unfolded synchronously.

[0031] In one alternative implementation, the synchronization component includes a first gear fixed to the connecting rods located on both sides of the main shaft. The pivot axis of each connecting rod coincides with the axis of the first gear corresponding to the connecting rod, and the first gears on both sides of the main shaft engage in transmission. This enables the parts on both sides of the main shaft to fold or unfold synchronously.

[0032] In one alternative implementation, the synchronization component includes a first gear and an even number of sequentially meshing second gears. The first gears located on both sides of the main shaft are driven by the even number of second gears. This enables partial synchronous folding or synchronous unfolding on both sides of the main shaft and also increases the distance between the pivot axes of the connecting rods on both sides of the main shaft, eliminating the need for clearance holes in the support plate to avoid the connecting rods and improving the reliability of the flexible screen.

[0033] In one alternative implementation, the second gear is always a single gear, which means that there is one gear on a shaft. By using multiple single gears, the distance between the pivot axes of the connecting rods on both sides of the main shaft can be increased.

[0034] In one alternative implementation, the two second gears are double gears, each double gear including a first tooth and a second tooth arranged coaxially. The first teeth of the first gears located on both sides of the main shaft mesh with the first teeth of the double gears, and the second teeth of the two double gears mesh with each other. A double gear is a form in which two gears of different diameters are arranged on a single shaft. By using a smaller number of double gears, partial synchronous folding or synchronous unfolding on both sides of the main shaft can be achieved, reducing reverse synchronous motion errors, increasing the distance between the pivot axes of the connecting rods on both sides of the main shaft, and improving the reliability of the flexible screen.

[0035] In one alternative implementation, the synchronization component can be a belt drive mechanism, in which two pulleys are correspondingly mounted on two connecting rods, the axis of the pulleys coincides with the pivot axis of the connecting rods, the drive belt is wound around the two pulleys and the drive belt is arranged in a figure-eight shape, and the synchronous folding or synchronous unfolding of the connecting rods on both sides of the main shaft is realized through the belt drive mechanism.

[0036] In one alternative implementation, the rotating shaft mechanism further includes a damping assembly mounted on the main shaft, which provides damping force to the connecting rod as it rotates relative to the main shaft.

[0037] The damping assembly provides damping force to the connecting rod, giving the moving components associated with the connecting rod a damping effect. When the components on both sides of the main shaft are in a closed, flattened, or intermediate state, external force is required to change the position of the components on both sides of the main shaft. When applied to foldable devices, external force is required to adjust the relative position of the first and second housings; without external force, the first and second housings cannot rotate freely relative to each other.

[0038] In one alternative implementation, the ends of a plurality of first gears have first cam portions, and the damping assembly includes a first integrated cam and a first elastic member. The first integrated cam is movable relative to the first cam portion along the axial direction of the first gear. The first integrated cam has a second cam portion that can mesh with the first cam portion. The first elastic member can act on the first integrated cam to press the second cam portion against the first cam portion.

[0039] When the connecting rod rotates relative to the main shaft, the first cam portion on the first gear rotates relative to the second cam portion of the first connecting cam. When the protrusion of the first cam portion slides into the recess of the second cam portion, the first elastic element is compressed, and a certain damping force is generated between the first cam portion and the second cam portion. The first cam portion and the second cam portion remain meshed, and the connecting rod and the main shaft remain relatively stationary, which can realize the closed state or the flattened state of the rotating shaft mechanism.

[0040] When the rotating shaft mechanism switches from the intermediate state to the flattened state or the closed state, the protruding part of the first cam tends to slide into the recessed part of the second cam, realizing the self-expanding or self-closing movement of the connecting rod relative to the main shaft, so that the foldable device can self-expand when it is close to the flattened state or self-close when it is close to the closed state.

[0041] In one alternative implementation, the damping assembly further includes a bracket and a first rod coaxially connected to the first gear; the bracket is fixed on the main shaft; both ends of the first rod are mounted on the bracket, and the first integrated cam is slidably mounted on the first rod. This structure is simple and reliable in operation.

[0042] In one alternative implementation, the bracket includes a first bracket and a second bracket distributed along the axial direction of the first gear on both sides of the first gear. A first rod passes through the first bracket, a first integrated cam, and the second bracket. The first rod has a head and a locking connector disposed opposite each other. The head of the first rod is locked outside the first bracket, and the locking connector and a limiting member cooperate to limit the first rod outside the second bracket. The size of the head of the first rod and the limiting member is larger than the size of the hole on the bracket through which the first rod passes, thereby limiting the first rod axially and mounting it on the first bracket and the second bracket.

[0043] In one alternative implementation, the end of the first rod with the snap-fit ​​connector passes through the bracket, and the snap-fit ​​connector and the slot of the limiting member engage. Under the action of the first elastic member, the first rod can be axially limited on the bracket, so that the first rod will not move axially and improve reliability.

[0044] In one alternative implementation, the number of the first integrated cam and the first elastic element is one, and each first gear has a first cam portion.

[0045] In one alternative implementation, there are two first integrated cams and two first elastic elements. Each first gear has two back-to-back first cam portions, and a set of first integrated cams and first elastic elements are arranged on both sides of the first gear along its axial direction.

[0046] Both of these methods can cause the second cam portion of the first integrated cam to press against the corresponding first cam portion, thereby achieving a damping effect when the rotating shaft mechanism switches between the closed and flat states.

[0047] In one alternative implementation, the damping assembly further includes a second integrated cam and a single cam spaced apart from the first cam portion. The second integrated cam is slidably mounted on the first rod, and the single cam and the first rod are synchronously rotatably connected. The second integrated cam has a third cam portion that can mesh with the single cam. A first elastic element is compressed between the first integrated cam and the second integrated cam, and is sleeved outside the first rod. The first elastic element can act on the second integrated cam to press the third cam portion against the single cam.

[0048] In a smaller space, by adding a second integrated cam and a single cam, the damping force of the rotating shaft mechanism when switching between the closed and flat states is increased, reducing the wear of the mating cam surfaces and extending the service life of the equipment.

[0049] When the connecting rod rotates relative to the main shaft, the first gear drives the single cam to rotate relative to the third cam portion of the second integrated cam via the first rod. When the protrusion of the single cam slides into the recess of the third cam portion, the first elastic element is compressed, and a certain damping force is generated between the single cam and the third cam portion. The single cam and the third cam portion remain meshed, and the connecting rod and the main shaft remain relatively stationary, which can realize the closed state or the flattened state of the rotating shaft mechanism.

[0050] When the rotating shaft mechanism switches from the intermediate state to the flattened state or the closed state, the protrusion of the single cam tends to slide into the recess of the third cam, and the single cam and the third cam mesh with each other, realizing the self-expanding or self-closing movement of the connecting rod relative to the main shaft, so that the foldable device can self-expand when it is close to the flattened state or self-close when it is close to the closed state.

[0051] In one alternative implementation, the damping assembly further includes a hovering cam, a second elastic element, and a second rod. The second gear, the hovering cam, and the second rod are synchronously rotatably connected. The second integrated cam has a fourth cam portion corresponding to at least one of the second gears, and the fourth cam portion and the hovering cam can mesh accordingly. The second elastic element is compressed and disposed between the first integrated cam and the hovering cam. The second elastic element is sleeved outside the second rod, and the second elastic element can act on the hovering cam to press the hovering cam against the fourth cam portion.

[0052] When the connecting rod rotates to the predetermined angle position, the protrusion of the hovering cam slides into the recess of the fourth cam, and the hovering cam and the fourth cam remain engaged. The connecting rod and the main shaft remain relatively stationary, which enables the rotating shaft mechanism to achieve a reliable hovering effect at the predetermined position and reduces wear between the mating cams.

[0053] In one alternative implementation, the damping assembly further includes a hovering cam, a second elastic element, and a second rod. The second gear, the hovering cam, and the second rod are synchronously rotatably connected. The first integrated cam has a fifth cam portion corresponding to at least one of the second gears, and the fifth cam portion and the hovering cam can mesh accordingly. The second elastic element is compressed and disposed between the bracket and the hovering cam. The second elastic element is sleeved outside the second rod, and the second elastic element can act on the hovering cam to press the hovering cam against the fifth cam portion.

[0054] When the connecting rod rotates relative to the main shaft, the first gear and the second gear rotate. The second gear drives the hovering cam to rotate relative to the fifth cam portion of the second connecting cam via the second rod. When the connecting rod rotates to a predetermined angle position, the protrusion of the hovering cam slides into the recess of the fifth cam portion, compressing the second elastic element. A certain damping force is generated between the hovering cam and the fifth cam portion, keeping them meshed. The connecting rod and the main shaft remain relatively stationary, enabling the rotating shaft mechanism to achieve a reliable hovering effect at a predetermined position and reducing wear between the mating cams.

[0055] Secondly, this application provides a foldable device, including a pivot mechanism, a first housing, a second housing, and a flexible screen. The pivot mechanism is located between the first housing and the second housing. A fixing frame located on one side of the main shaft is fixed to the first housing, and a fixing frame located on the other side of the main shaft is fixed to the second housing. The two ends of the flexible screen are respectively fixed to the first housing and the second housing, and the middle area of ​​the flexible screen is provided corresponding to the pivot mechanism.

[0056] Adjusting the relative position of the first and second housings to the main shaft in the rotating mechanism involves adjusting the position of the fixed brackets located on both sides of the main shaft relative to it. As the foldable device gradually folds, the flexible screen bends along with the first and second housings until the rotating mechanism is closed. The area of ​​the flexible screen corresponding to the rotating mechanism bends into a teardrop shape, which can be accommodated within the screen-receiving space of the closed rotating mechanism. As the foldable device gradually unfolds, the flexible screen unfolds along with the first and second housings until the rotating mechanism is flattened, at which point the flexible screen is supported by the first housing, the rotating mechanism, and the second housing.

[0057] In one alternative implementation, the foldable device includes a pivot mechanism and a first housing and a second housing respectively connected to both sides of the pivot mechanism, the first housing and the second housing being folded and unfolded by the pivot mechanism.

[0058] In one alternative implementation, the foldable device includes two or more first housings, with a second housing disposed between each pair of adjacent first housings, and a pivot mechanism connecting the adjacent first and second housings, so that the foldable device forms a stacked structure of three or more layers when folded. Attached Figure Description

[0059] Figure 1 (a) and (b) in the figure are schematic diagrams of the U-shaped pivot mechanism and the teardrop-shaped pivot mechanism of the relevant technologies when applied to foldable devices, respectively.

[0060] Figure 2 This is a schematic diagram of the structure of a pivot mechanism applied to a foldable device in a flattened state.

[0061] Figure 3 This is a schematic diagram of the teardrop-shaped rotating shaft mechanism of related technologies;

[0062] Figure 4 This is a schematic diagram of the rotating shaft mechanism in the closed state in a related technology.

[0063] Figure 5 A partial cross-sectional view of the pivot mechanism of the related technology applied to the foldable device in the closed state;

[0064] Figure 6 This is a schematic diagram of the structure of the foldable device provided in the embodiments of this application;

[0065] Figure 7 for Figure 6 Exploded 3D view of a foldable device;

[0066] Figure 8 (a) and (b) in the text are respectively Figure 6The diagram shows the structure of the foldable device in its flat and closed states; the flexible screen is not shown.

[0067] Figure 9 for Figure 8 Exploded perspective view of the foldable device in (a) of the image;

[0068] Figure 10 A schematic diagram of the rotating shaft mechanism provided in the embodiments of this application;

[0069] Figure 11 An exploded perspective view of the rotating shaft mechanism provided in the embodiments of this application;

[0070] Figure 12 for Figure 11 A three-dimensional assembly drawing of the rotating shaft mechanism;

[0071] Figure 13 for Figure 12 A three-dimensional assembly drawing of the rotating shaft mechanism from another angle;

[0072] Figure 14 for Figure 8 A partial cross-sectional view of the foldable device along line AA in (a) of the image;

[0073] Figure 15 for Figure 8 Partial cross-sectional view of the foldable device along line BB in (b), where the first and second housings are not shown;

[0074] Figure 16 This is a schematic diagram of the rotating shaft mechanism in a related technology when thin steel sheets are used;

[0075] Figure 17 This is a schematic diagram of the rotating shaft mechanism of the related technology during the lifting and lowering movement of the main shaft support plate;

[0076] Figure 18 for Figure 11 A schematic diagram of the support plate in the rotating shaft mechanism;

[0077] Figure 19 A perspective assembly drawing of a synchronization component in a rotating shaft mechanism provided in another embodiment of this application;

[0078] Figure 20 An exploded perspective view of a synchronization component in a rotating shaft mechanism provided in another embodiment of this application;

[0079] Figure 21 A schematic diagram of the structure of a double gear in a synchronous component of a rotating shaft mechanism provided in another embodiment of this application;

[0080] Figure 22 for Figure 11A three-dimensional assembly diagram of the synchronization component and damping component in the rotating shaft mechanism;

[0081] Figure 23 for Figure 22 3D exploded view of the synchronization component and damping component;

[0082] Figure 24 A three-dimensional assembly drawing of the synchronization component and damping component in a rotating shaft mechanism provided in another embodiment of this application;

[0083] Figure 25 for Figure 24 3D exploded view of the synchronization component and damping component;

[0084] Figure 26 A schematic diagram of the structure of the first and second cams in the rotating shaft mechanism of a related technology;

[0085] Figure 27 (a) and (b) in the text are respectively Figure 22 The diagram shows the structure of the second integrated cam and the hovering cam in the damping assembly when they are not engaged and when they are engaged.

[0086] Explanation of reference numerals in the attached figures:

[0087] 10' - Rotating shaft mechanism; 20' - Housing; 21 - Gap; 30' - Flexible screen;

[0088] 10-Spindle mechanism; 11-Main shaft; 11a-Main shaft support plate; 12-Fixed frame; 13-Connecting rod; 14-Swing rod; 15-Support plate; 15a-Allowing hole; 16-Thin steel sheet; 17-First cam; 18-Second cam; 20-Housing; 30-Flexible screen;

[0089] 1000 - Foldable devices;

[0090] 100 - Rotating shaft mechanism; 101 - Screen housing space;

[0091] 110 - Main shaft; 110a - Symmetry plane; 111 - Receiving groove; 112 - First circular arc groove;

[0092] 120 - Linkage; 120a - Pivot axis; 120' - Linkage; 121 - Second sliding part; 121a - Guide arm;

[0093] 130 - Fixing frame; 131 - First sliding part; 131a - Guide groove; 132 - Baffle; 133 - Second arc groove;

[0094] 140 - Support plate; 140a - Axis; 140b - Axis; 140c - End; 141 - First arc arm; 142 - First baffle; 143 - Second arc arm; 144 - Second baffle;

[0095] 150 - Synchronization component; 151 - First gear; 152 - Second gear; 152a - Single gear; 152b - Double gear; 1521 - First tooth; 1522 - Second tooth;

[0096] 160 - Damping assembly; 161 - First cam portion; 161a - Protrusion; 161b - Recess; 162 - First integrated cam; 1621 - Second cam portion; 1621a - Protrusion; 1621b - Recess; 1622 - Fifth cam portion; 1623 - Groove; 163 - First elastic element; 164 - Bracket; 164a - First bracket; 164b - Second bracket; 1641 - First rod; 1641a - Head; 1641b - Snap-fit ​​connector; 1642 - Second rod; 1643 - Third rod; 165 - Second integrated cam; 1651 - Third cam portion; 1652 - Fourth cam portion; 1652b - Recess; 166 - Single cam; 167 - Hovering cam; 167a - Protrusion; 168 - Second elastic element; 169 - Limiting element; 1691 - Snap-fit ​​groove;

[0097] 200 - First housing; 300 - Second housing; 400 - Flexible screen. Detailed Implementation

[0098] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this implementation. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0099] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0100] It should be understood that, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. The character " / " in this document generally indicates that the preceding and following objects are in an "or" relationship.

[0102] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0103] See Figure 1 (b) Figure 2 and Figure 3A hinge mechanism 10 of a foldable device in related technology enables the folding and unfolding of two housings 20. The conventional hinge mechanism 10 includes a main shaft 11, a fixed frame 12, a connecting rod 13, a swing rod 14, and a support plate 15. The main shaft 11 serves as a fixed component, while the fixed frame 12, connecting rod 13, swing rod 14, and support plate 15 serve as movable components. One end of the connecting rod 13 is pivotally connected to the main shaft 11 with axis R1 as its center, and the other end is slidably mounted on the fixed frame 12. One end of the swing rod 14 is pivotally connected to the main shaft 11 with axis R2 as its center, and the other end is pivotally connected to the fixed frame 12. The connecting rod 13 and the swing rod 14 are spaced apart and do not overlap on the pivot axes (R1, R2) on the main shaft 11. One end of the support plate 15 is pivotally connected to the fixed frame 12. These five kinematic pairs constitute lower pairs. The support plate 15 has a guide groove, and the connecting rod 13 is provided with a guide shaft. The guide groove is slidably disposed in the guide groove. This kinematic pair is a higher pair.

[0104] The mounting bracket 12 is used for fixed connection with the equipment housing 20. When the equipment housing 20 rotates relative to the main shaft 11, the mounting bracket 12 drives the connecting rod 13 and the swing rod 14 to rotate relative to the main shaft 11, and drives the support plate 15 to move. Figure 4 and Figure 5 As shown, in the closed state, a screen-accommodating space is formed between the support plates 15 on both sides of the main shaft 11 and the main shaft 11, which can accommodate the teardrop-shaped portion of the folded flexible screen 30. Figure 2 As shown, in the flattened state, the support plates 15 on both sides of the main shaft 11 and the main shaft 11 together support the corresponding part of the unfolded flexible screen 30. This can be understood as the main shaft 11 having a main shaft support plate 11a on its surface, and the two support plates 15 and the main shaft support plate 11a together supporting the corresponding part of the unfolded flexible screen 30. The rotating shaft mechanism 10 of related technologies has many parts, a complex structure, low reliability, and high cost.

[0105] See Figure 6 This application provides a foldable device 1000, which can be a mobile phone, tablet computer, laptop computer, super mobile personal computer, e-book reader, netbook, personal digital assistant, smart wearable device (such as smartwatch), etc.

[0106] See Figure 6 , Figure 7 The foldable device 1000 includes a hinge mechanism 100, a first housing 200, a second housing 300, and a flexible screen 400. The hinge mechanism 100 is located between the first housing 200 and the second housing 300, which are respectively connected to opposite sides of the hinge mechanism 100. The flexible screen 400 is fixed to the first housing 200 and the second housing 300. The first housing 200 and the second housing 300 can be used to mount circuit boards, batteries, receivers, speakers, cameras, and other devices. The circuit boards can house processors, storage units, antennas, and other devices.

[0107] The flexible screen 400 can be used to display images and information, and can also input commands and information. The flexible screen 400 can be an organic light-emitting diode (OLED) display, an active matrix OLED or active matrix OLED display, a miniature OLED display, a micro OLED display, a micro organic light-emitting diode display, a quantum dot OLED display, etc.

[0108] The rotating shaft mechanism 100 has a flattened state and a closed state. (See also...) Figure 6 , Figure 8 In (a), when the rotating shaft mechanism 100 is in a flattened state, the first housing 200 and the second housing 300 are arranged on both sides of the rotating shaft mechanism 100 and unfolded, with the first housing 200 and the second housing 300 at approximately 180° (some deviations are allowed, such as 178°, 182°, etc.). The flexible screen 400 unfolds and is supported on the first housing 200, the rotating shaft mechanism 100 and the second housing 300.

[0109] See Figure 8 In (b) of the diagram, when the pivot mechanism 100 is in the closed state, the first housing 200 and the second housing 300 close together to form a stacked structure, and the flexible screen 400 bends along with the first housing 200 and the second housing 300. The pivot mechanism 100 also has an intermediate state in the switching process between the flattened state and the closed state. By switching between different states of the pivot mechanism 100, the foldable device 1000 can be folded and unfolded.

[0110] The foldable device 1000 may include a pivot mechanism 100 and a first housing 200 and a second housing 300 respectively connected to both sides of the pivot mechanism 100. The first housing 200 and the second housing 300 are folded and unfolded through the pivot mechanism 100. In addition, the foldable device 1000 may include two or more first housings 200, with a second housing 300 disposed between each two adjacent first housings 200. A pivot mechanism 100 is connected between adjacent first housings 200 and second housings 300. When folded, the foldable device 1000 forms a stacked structure of three or more layers.

[0111] See Figures 9 to 13This application provides a rotating shaft mechanism 100, including a main shaft 110, a plurality of connecting rods 120, pairs of fixed frames 130, and pairs of support plates 140. One or more connecting rods 120 are respectively disposed on both sides of the main shaft 110 along an axial direction perpendicular to the main shaft 110, with one end of each connecting rod 120 pivotally connected to the main shaft 110 with axis 120a as the center. Each pair of fixed frames 130 is respectively disposed on both sides of the main shaft 110 along an axial direction perpendicular to the main shaft 110, with the fixed frame 130 on the same side of the main shaft 110 corresponding to the connecting rod 120, and the connecting rod 120 slidably connected to the fixed frame 130 corresponding to the connecting rod 120. Each pair of support plates 140 is respectively disposed on both sides of the main shaft 110 along an axial direction perpendicular to the main shaft 110, with the support plate 140 on the same side of the main shaft 110 corresponding to the fixed frame 130. One end of each support plate 140 is pivotally connected to the main shaft 110 with axis 140a as the center, and the other end is pivotally connected to the corresponding fixing frame 130 with axis 140b as the center. The connecting rod 120 and the support plate 140, located on the same side of the main shaft 110, are spaced apart on the pivot axes (120a, 140a) of the main shaft 110. Figure 10 , Figure 14 , Figure 15 The fixed frames 130 located on both sides of the main shaft 110 can rotate relative to the main shaft 110, so that the rotating shaft mechanism 100 can switch between a flattened state and a closed state. During the process of the rotating shaft mechanism 100 switching from a flattened state to a closed state, the fixed frames 130 located on both sides of the main shaft 110 rotate towards each other. The fixed frames 130 drive the connecting rods 120 and the support plates 140 corresponding to the fixed frames 130 to rotate, so that the support plates 140 located on both sides of the main shaft 110 and the main shaft 110 form a screen space 101.

[0112] Among them, such as Figure 8 (a) Figure 14 As shown, the flattened state of the rotating shaft mechanism 100 refers to the state in which the support plates 140 located on both sides of the main shaft 110 are approximately flush. The side of the support plates 140 facing the flexible screen 400 can be approximately 180° (a certain deviation is allowed, such as 178°, 182°, etc.). Figure 8 (b) Figure 15 As shown, the closed state of the rotating shaft mechanism 100 refers to the support plates 140 located on both sides of the main shaft 110 coming together, from... Figure 15 It can be seen that the support plates 140 on both sides form a shape that is narrow at the top and wide at the bottom, and an acute angle can be formed between the support plates 140 on both sides of the main shaft 110.

[0113] The opposing rotation of the fixing brackets 130 on both sides of the main shaft 110 means that the fixing brackets 130 on both sides rotate relative to the main shaft 110, and the distance between the fixing brackets 130 on both sides gradually decreases. During the process of the rotating shaft mechanism 100 switching from the flattened state to the closed state, the ends 140c of the support plates 140 on both sides of the main shaft 110 near the main shaft 110 gradually separate. In the closed state, the rotating shaft mechanism 100 forms a roughly triangular screen-accommodating space 101 between the support plates 140 on both sides of the main shaft 110 and the main shaft 110, which facilitates the accommodation of the teardrop-shaped bent portion of the flexible screen 400.

[0114] The rotating shaft mechanism 100 provided in this embodiment is described in reference to... Figure 10 The main shaft 110 serves as a fixed component, while the connecting rod 120, fixed frame 130, and support plate 140 serve as movable components, collectively forming a linkage-slider mechanism. The connecting rod 120 is slidably mounted on the fixed frame 130 and pivotally connected to the main shaft 110. Both ends of the support plate 140 are pivotally connected to the main shaft 110 and the fixed frame 130, respectively. When the fixed frames 130 located on both sides of the main shaft 110 rotate, they can drive the connecting rod 120 and the support plate 140 to rotate, realizing the switching of the rotating shaft mechanism 100 between a flattened state and a closed state. This linkage-slider mechanism 100 has only three movable components, a total of four lower pairs without the need for higher pairs, resulting in fewer parts, a simple structure, good reliability, and low cost. Figure 15 When the pivot mechanism 100 switches to the closed state, a screen-accommodating space 101 is formed between the support plates 140 on both sides of the main shaft 110 and the main shaft 110 to accommodate the teardrop-shaped bending part of the flexible screen 400 when folded.

[0115] See Figure 6 , Figure 7 , Figure 14 When the pivot mechanism 100 is applied to the foldable device 1000, the foldable device 1000 includes the pivot mechanism 100, the first housing 200, the second housing 300, and the flexible screen 400. The pivot mechanism 100 is located between the first housing 200 and the second housing 300. The fixing frame 130 located on one side of the main shaft 110 is fixed to the first housing 200, and the fixing frame 130 located on the other side of the main shaft 110 is fixed to the second housing 300. The two ends of the flexible screen 400 are respectively fixed to the first housing 200 and the second housing 300. The middle area of ​​the flexible screen 400 is set corresponding to the pivot mechanism 100.

[0116] The fixing frame 130 and the first housing 200 (or the second housing 300) can be connected by means of adhesive, snap-fit, or fasteners (such as screws). The flexible screen 400 and the first housing 200 (or the second housing 300) can also be connected by adhesive. The flexible screen 400 and the rotating shaft mechanism 100 are not connected. When the first housing 200 and the second housing 300 are folded, the corresponding area of ​​the flexible screen 400 bends and forms a teardrop shape.

[0117] When adjusting the relative positions of the first housing 200 and the second housing 300 with respect to the main shaft 110 in the pivot mechanism 100, the position of the fixing brackets 130 located on both sides of the main shaft 110 relative to the main shaft 110 is adjusted. During the gradual folding of the foldable device 1000, the flexible screen 400 bends along with the first housing 200 and the second housing 300 until the pivot mechanism 100 is in a closed state. The area of ​​the flexible screen 400 corresponding to the pivot mechanism 100 bends into a teardrop shape, which can be accommodated within the screen-accommodating space 101 of the closed pivot mechanism 100. During the gradual unfolding of the foldable device 1000, the flexible screen 400 unfolds along with the first housing 200 and the second housing 300 until the pivot mechanism 100 is in a flattened state. The flexible screen 400 is supported on the first housing 200, the pivot mechanism 100, and the second housing 300.

[0118] When setting spindle 110, refer to Figure 11 , Figure 12 The main shaft 110 serves as a fixed component, and components such as the support plate 140 and connecting rod 120 can be mounted on it. The main shaft 110 can be roughly designed in a flat strip shape. Receiving slots 111 for mounting related parts, such as the synchronization component 150 and damping component 160 mentioned later, can be provided on the main shaft 110. The outer surface of the main shaft 110 can be provided with an arc-shaped surface to improve the appearance of the shaft mechanism 100 when applied to the foldable device 1000.

[0119] When setting up linkage 120, refer to Figure 11 , Figure 14 The connecting rod 120 can be configured as a straight rod or a rod with a certain curved shape. For example, the connecting rod 120 can be configured as a structure with at least three connecting segments, satisfying the rotational connection between the connecting rod 120 and the main shaft 110 and the sliding connection between the connecting rod 120 and the fixed frame 130. During the switching between the flattened and closed states of the rotating shaft mechanism 100, the connecting rod 120 does not interfere with other components. Combined with... Figure 15 When the rotating shaft mechanism 100 is in the folded state, the connecting rods 120 on both sides of the main shaft 110 are located outside the two support plates 140, so there is no need to provide clearance holes on the support plates 140.

[0120] When setting the fixing frame 130, the fixing frame 130 can be set as a strip or other shape. It is necessary to reliably fix the fixing frame 130 on the first housing 200 and the second housing 300, and to realize the sliding connection between the fixing frame 130 and the connecting rod 120 and the rotational connection between the fixing frame 130 and the support plate 140.

[0121] When setting the support plate 140, the support plate 140 extends along the axial direction of the main shaft 110, so that the support plate 140 in the flattened state can effectively support the flexible screen 400. The support plate 140 can be roughly set as a rectangle.

[0122] In some embodiments, see Figure 14 During the transition of the rotating shaft mechanism 100 from a closed state to a flattened state, the fixed frames 130 located on both sides of the main shaft 110 rotate in opposite directions. The fixed frames 130 drive the corresponding connecting rods 120 and support plates 140 to rotate, so that the support plates 140 on both sides of the main shaft 110 are flush and can cover one side of the main shaft 110. The inverse rotation of the fixed frames 130 on both sides of the main shaft 110 means that the fixed frames 130 on both sides rotate relative to the main shaft 110, and the distance between the fixed frames 130 on both sides gradually increases.

[0123] As the rotating mechanism 100 gradually unfolds, the distance between the ends 140c of the support plates 140 located on both sides of the main shaft 110 near the main shaft 110 gradually decreases until the rotating mechanism 100 is in a flattened state. At this point, the ends 140c of the support plates 140 near the main shaft 110 approach each other, become flush, and cover one side of the main shaft 110. This allows the support plates 140 to support the corresponding area of ​​the flexible screen 400 without requiring... Figure 2 The main shaft 11 of the related technology pivot mechanism 10 is provided with a main shaft support plate 11a to support the corresponding area of ​​the flexible screen, which can simplify the structure and reduce production costs.

[0124] A rotating shaft mechanism 10 mentioned above is described in the related technology; see [link / reference]. Figure 5 During the movement of the support plate 15 relative to the main shaft 11, there is an overlap in the motion trajectory between the support plate 15 and the connecting rod 13. To avoid interference between the support plate 15 and the connecting rod 13, a clearance hole 15a is provided on the support plate 15 to allow the connecting rod 13 to pass. Figure 2 In the flattened state of the rotating shaft mechanism 100, the clearance hole 15a of the support plate 15 provides poor support for the flexible screen 30, making the flexible screen 30 prone to dents or even damage and failure. To avoid this problem, such as... Figure 16 As shown, related technologies would provide a thin steel sheet 16 on the same side of the support plate 15 and the spindle support plate 11a to cover the clearance hole 15a; or, as... Figure 17As shown, a lifting mechanism (not shown) is installed on the spindle 11 to realize the lifting movement of the spindle support plate 11a. In the closed state, the spindle support plate 11a descends, and in the flattened state, the spindle support plate 11a rises to a position flush with the two side support plates 15 (shown by the dotted lines). Both of these methods complicate the structure and manufacturing process, and increase costs.

[0125] In some embodiments of this application, see reference Figure 14 , Figure 15 The pivot axis 120a of the connecting rods 120 located on both sides of the main shaft 110 is symmetrically arranged on both sides of the pivot axis 140a of the pair of support plates 140 on the main shaft 110.

[0126] The connecting rods 120, the fixing frame 130, and the support plates 140, which are movable components, are distributed on both sides of the main shaft 110 in a direction perpendicular to the axial direction of the main shaft 110, forming a symmetry plane 110a on the main shaft 110. The pivot axes 140a of the support plates 140 on both sides and the main shaft 110 are set close to the symmetry plane 110a, while the pivot axes 120a of the connecting rods 120 on both sides and the main shaft 110 are set away from the symmetry plane 110a. The support plates 140 do not need to be provided with clearance holes to avoid the connecting rods 120, so that the unfolded support plates 140 on both sides can better support the corresponding parts of the flexible screen 400. This reduces the possibility that the flexible screen 400 will dent or even fail in the flattened state due to the existence of clearance holes in the support plates 140. It also eliminates the need to provide thin steel sheets or lifting mechanisms on the main shaft 110 to reduce the failure of the flexible screen 400, improves the reliability of the flexible screen 400, and reduces production costs.

[0127] See Figure 15 When the rotating shaft mechanism 100 is in the closed state, if the connecting rod 120' is located at the position shown by the dotted line, the distance between the pivot axes of the connecting rods 120' located on both sides of the main shaft 110 is less than or equal to the distance between the paired support plates 140 near the main shaft 110. In order to avoid interference between the connecting rods 120' and the support plates 140, the support plates 140 must be provided with clearance holes, which may lead to the flexible screen being dented or even damaged and malfunctioning in the flattened state.

[0128] In some embodiments of this application, see reference Figure 15 When the rotating shaft mechanism 100 is in the closed state, the connecting rod 120 is located on the side of the support plate 140 corresponding to the connecting rod 120 that faces away from the accommodating screen space 101. The distance between the pivot axes 120a of the connecting rods 120 on both sides of the main shaft 110 is greater than the distance between the paired support plates 140 near the main shaft 110. The distance between the paired support plates 140 near the main shaft 110 is the distance between the ends 140c of the two support plates 140 near the main shaft 110.

[0129] By increasing the distance between the pivot axes 120a of the connecting rods 120 on both sides of the main shaft 110, the connecting rods 120 in the closed rotating shaft mechanism 100 are located on the outside of the corresponding support plate 140 instead of on the side close to the screen space 101. The connecting rods 120 and the support plate 140 do not interfere with each other, and the support plate 140 does not need to be provided with clearance holes to avoid the connecting rods 120. This allows the unfolded support plates 140 on both sides to better support the corresponding parts of the flexible screen 400, reducing the possibility of the flexible screen 400 denting or even being damaged and failing due to clearance holes in the support plate 140. It also eliminates the need to provide thin steel sheets or lifting mechanisms on the main shaft 110 to reduce the failure of the flexible screen 400, improves the reliability of the flexible screen 400, and reduces production costs.

[0130] For example, the pivot axes 120a of the connecting rods 120 on both sides of the spindle 110 are respectively set close to the two sides of the spindle 110 in the vertical direction of the axial direction. This maximizes the distance between the pivot axes 120a of the connecting rods 120 on both sides of the spindle 110, overcoming the problem of interference between the connecting rods 120 and the support plate 140 in the closed state, which requires opening clearance holes on the support plate 140. Moreover, it makes full use of the limited space of the spindle 110, making it easier to arrange other parts on the spindle 110.

[0131] When the connecting rod 120 and the main shaft 110 are pivotally connected, refer to Figures 13 to 15 The connecting rod 120 and the main shaft 110 can be connected by a pivot or a virtual shaft, both of which can achieve a rotational connection between the connecting rod 120 and the main shaft 110.

[0132] A pivot connection refers to a connection between two parts where one part has a connecting shaft and the other part has a connecting hole. The connecting shaft passes through the connecting hole and can rotate around the axis of the connecting hole, thus achieving a rotatable connection between the two parts.

[0133] Virtual axis connection refers to a connection where one part has an arc arm and the other part has an arc groove, with the axes of the arc arm and the arc groove coinciding. The arc arm can slide within the arc groove, enabling a rotational connection between the two parts. The arc groove can be a quarter-circular arc groove, a third-circular arc groove, a half-circular arc groove, etc., and the arc arm can also be a quarter-circular arc arm, a third-circular arc arm, a half-circular arc arm, etc., and the shape and position of the arc arm and arc groove can be adjusted as needed.

[0134] For example, a first rod 1641 is connected to the connecting rod 120, and a bracket is installed on the main shaft 110. The bracket has a connecting hole, and the first rod 1641 passes through the connecting hole of the bracket, so that the connecting rod 120 is rotatably connected to the main shaft 110.

[0135] When the fixed frame 130 and the connecting rod 120 are slidably connected, refer to Figure 11 , Figure 13The fixing frame 130 has a first sliding part 131, and the connecting rod 120 corresponding to the fixing frame 130 has a second sliding part 121. The first sliding part 131 and the second sliding part 121 are slidably engaged so that the connecting rod 120 is slidably connected to the fixing frame 130.

[0136] By sliding the first sliding part 131 of the fixing frame 130 and the second sliding part 121 of the connecting rod 120 together, a stable sliding connection between the fixing frame 130 and the connecting rod 120 can be achieved. The first sliding part 131 and the second sliding part 121 are located on the side of the support plate 140 that is away from the flexible screen 400, so that the first sliding part 131 and the second sliding part 121 do not affect the support of the support plate 140 for the flexible screen 400 when it is flat, nor do they affect the screen-accommodating space 101 formed by the two support plates 140 and the main shaft 110 when it is closed.

[0137] When setting the first sliding part 131 and the second sliding part 121, refer to Figure 11 , Figure 13 The first sliding part 131 is a guide groove 131a provided on the fixed frame 130, and the second sliding part 121 is a guide arm 121a provided on the connecting rod 120. The guide arm 121a is slidably mounted on the guide groove 131a. Using the guide groove 131a and guide arm 121a facilitates molding and assembly, and enables a stable and reliable sliding connection between the fixed frame 130 and the connecting rod 120. The guide groove 131a can extend along a straight line or an arc.

[0138] For example, see Figure 11 , Figure 13 The fixed frame 130 has two opposing baffles 132. Each baffle 132 has a guide groove 131a on its opposite side. The end of the connecting rod 120 away from the main shaft 110 can slide between the two baffles 132. The opposite sides of the connecting rod 120 protrude to form guide arms 121a. The two guide arms 121a are slidably installed in the two guide grooves 131a in a one-to-one correspondence, so that the connecting rod 120 can only slide along the guide grooves 131a, reducing the possibility of the connecting rod 120 disengaging from the guide grooves 131a.

[0139] In addition, a baffle 132 can be provided on the fixed frame 130, the baffle 132 is provided with a guide groove 131a, and a guide arm 121a is provided on the connecting rod 120. The guide arm 121a is slidably installed in the guide groove 131a, which can also realize the sliding connection between the connecting rod 120 and the fixed frame 130.

[0140] In other embodiments, the first sliding part 131 is a guide arm provided on the fixed frame 130, and the second sliding part 121 is a guide groove provided on the connecting rod 120. The guide arm is slidably installed in the guide groove, which can also realize a stable and reliable sliding connection between the fixed frame 130 and the connecting rod 120.

[0141] When the support plate 140 and the main shaft 110 are pivotally connected, refer to Figures 11 to 13 The support plate 140 and the main shaft 110 can be connected by a virtual axis or a pivot, both of which can achieve a rotational connection between the support plate 140 and the main shaft 110.

[0142] In some embodiments, see Figure 11 , Figure 13 , Figure 18 The support plate 140 and the main shaft 110 are connected by a virtual axis. Each support plate 140 has one or more first arc arms 141, and the main shaft 110 has one or more first arc grooves 112 corresponding to the one or more first arc arms 141. The one or more first arc arms 141 are slidably mounted on the one or more first arc grooves 112 so that the support plate 140 is pivotally connected to the main shaft 110.

[0143] The first arc arm 141 of the support plate 140 and the first arc groove 112 of the main shaft 110 slide together, which can realize a stable and reliable rotational connection between the support plate 140 and the main shaft 110, simplifying the structure and making assembly easier. The first arc arm 141 is located on the side of the support plate 140 that is away from the flexible screen 400, so that the first arc arm 141 does not affect the support of the support plate 140 for the flexible screen 400 when it is flat, nor does it affect the screen-accommodating space 101 formed by the two support plates 140 and the main shaft 110 when it is closed.

[0144] When multiple first arc arms 141 are provided on the same support plate 140, the support plate 140 can be spaced out along the axial direction of the main shaft 110, and multiple first arc grooves 112 are provided at corresponding positions on the main shaft 110, so that the rotational connection between the support plate 140 and the main shaft 110 can be better realized.

[0145] For example, the support plate 140 is provided with a first arc arm 141 at each end of the axial direction of the main shaft 110, and a first arc groove 112 is provided at each end of the main shaft 110, which can realize a stable rotational connection between the support plate 140 and the main shaft 110. More space can be reserved in the middle position of the main shaft 110 for assembling other parts, such as installing the synchronization component 150 and damping component 160 mentioned below on the main shaft 110.

[0146] When the first arc grooves 112 corresponding to the two side support plates 140 are provided on the main shaft 110, the first arc grooves 112 on both sides of the main shaft 110 in the vertical direction along the axial direction of the main shaft 110 can be staggered along the axial direction of the main shaft 110, which facilitates the forming of the first arc grooves 112 corresponding to the two side support plates 140 on the main shaft 110. Correspondingly, the first arc arms 141 of the two side support plates 140 are staggered along the axial direction of the main shaft 110. In addition, the first arc grooves 112 on both sides of the main shaft 110 in the vertical direction along the axial direction of the main shaft 110 can also be arranged facing each other.

[0147] When setting the first arc arm 141, refer to Figure 11 , Figure 13 , Figure 18 A first baffle 142 can be provided at one end of the first arc arm 141, and a space for accommodating the first baffle 142 can be provided on the main shaft 110. The first baffle 142 can enhance the structural strength of the first arc arm 141 and improve reliability. During the sliding process of the first arc arm 141 relative to the first arc groove 112, it can form a limiting effect on the first arc arm 141 along the axial direction of the main shaft 110, reducing the possibility that the support plate 140 will detach from the main shaft 110 when rotating relative to the main shaft 110.

[0148] In other embodiments, each support plate 140 has a first arcuate groove, and the main shaft 110 has a first arcuate arm. The first arcuate arm is slidably mounted on the first arcuate groove, which also enables the support plate 140 to be pivotally connected to the main shaft 110.

[0149] When the support plate 140 and the fixing frame 130 are pivotally connected, refer to Figure 11 , Figure 13 The support plate 140 and the fixed frame 130 can be connected by a virtual axis or a pivot, both of which can achieve a rotational connection between the support plate 140 and the fixed frame 130.

[0150] In some embodiments, see Figure 11 , Figure 12 , Figure 18 The support plate 140 and the fixing frame 130 are connected by a virtual axis. Each support plate 140 has one or more second arc arms 143. The fixing frame 130 has one or more second arc grooves 133 corresponding to the one or more second arc arms 143. The one or more second arc arms 143 are slidably mounted in the one or more second arc grooves 133 so that the support plate 140 is pivotally connected to the fixing frame 130.

[0151] The second arc arm 143 of the support plate 140 and the second arc groove 133 of the fixing frame 130 slide together, which can realize a stable and reliable rotational connection between the support plate 140 and the fixing frame 130, simplifying the structure and facilitating assembly. The second arc arm 143 and the second arc groove 133 are located on the side of the support plate 140 that is away from the flexible screen 400, so that the second arc arm 143 and the second arc groove 133 do not affect the support of the support plate 140 for the flexible screen 400 in the flat state, nor do they affect the screen-accommodating space 101 formed by the two support plates 140 and the main shaft 110 in the closed state.

[0152] When multiple sets of second arc arms 143 and second arc grooves 133 are set, the support plate 140 can distribute multiple second arc arms 143 at intervals along the axial direction of the main shaft 110, and the fixing frame 130 can be provided with multiple second arc grooves 133 at corresponding positions, so that the rotational connection between the support plate 140 and the fixing frame 130 can be better realized.

[0153] For example, the support plate 140 is provided with a second arc arm 143 at both ends of the main shaft 110 in the axial direction, and the fixing frame 130 is provided with a second arc groove 133 at both ends of the main shaft 110 in the axial direction, so that the support plate 140 and the fixing frame 130 can be stably rotated and connected. More space can be reserved in the middle position of the fixing frame 130 to assemble other parts, such as slidingly installing the connecting rod 120 on the fixing frame 130.

[0154] When setting the second arc arm 143, refer to Figure 11 , Figure 12 , Figure 18 A second baffle 144 can be provided at one end of the second arc arm 143. The second baffle 144 can enhance the structural strength of the second arc arm 143 and improve reliability. During the sliding process of the second arc arm 143 relative to the second arc groove 133, it can limit the second arc arm 143 along the axial direction of the main shaft 110, reducing the possibility that the support plate 140 will detach from the fixed frame 130 when rotating relative to the fixed frame 130.

[0155] In other embodiments, the fixing frame 130 has a second arc groove, and each support plate 140 has a second arc arm. The second arc arm is slidably mounted on the second arc groove, which also enables the support plate 140 to be pivotally connected to the fixing frame 130.

[0156] In order to enable the portions on both sides of the main shaft 110 to fold or unfold synchronously during the switching between the closed and unfolded states of the rotating shaft mechanism 100, in some embodiments, see [reference needed]. Figure 14 , Figure 15 The rotating shaft mechanism 100 also includes a synchronization component 150 disposed on the main shaft 110, which enables the connecting rods 120 located on both sides of the main shaft 110 to rotate synchronously in opposite directions.

[0157] By setting the synchronization component 150, the connecting rods 120 on both sides of the main shaft 110 can move synchronously in opposite directions. The connecting rods 120, the fixed frame 130 and the support plate 140 on both sides of the main shaft 110 constitute two sets of connecting rod slider mechanisms. The two sets of connecting rod slider mechanisms move synchronously in opposite directions, that is, the parts on both sides of the main shaft 110 can be folded or unfolded synchronously. When applied to the foldable device 1000, the first housing 200 and the second housing 300 can be folded or unfolded synchronously, improving the user experience.

[0158] In some embodiments, see Figure 14 , Figure 15 The synchronization component 150 includes first gears 151 fixed to the connecting rods 120 located on both sides of the main shaft 110. The pivot axis 120a of each connecting rod 120 coincides with the axis of the first gear 151 corresponding to the connecting rod 120. The first gears 151 located on both sides of the main shaft 110 are in transmission engagement. The transmission engagement of the two first gears 151 can be direct meshing, or other gears can be provided between the two first gears 151 for meshing.

[0159] When adjusting the position of the fixing bracket 130 on one side of the main shaft 110 relative to the main shaft 110, the corresponding connecting rod 120 and support plate 140 are linked together. The connecting rod 120 rotates relative to the main shaft 110. The transmission engagement of the two first gears 151 drives the connecting rod 120 on the other side of the main shaft 110 to rotate in the opposite direction relative to the main shaft 110, thereby linking the corresponding fixing bracket 130 and support plate 140 together, so that the parts on both sides of the main shaft 110 can be folded or unfolded synchronously.

[0160] In some embodiments, see Figure 14 , Figure 15 The synchronization component 150 includes a first gear 151 and an even number of sequentially meshing second gears 152. The first gear 151 located on both sides of the main shaft 110 is driven by the even number of second gears 152.

[0161] Setting an even number of second gears 152 allows for partial synchronous folding or unfolding on both sides of the main shaft 110. It also increases the distance between the pivot axes 120a of the connecting rods 120 on both sides of the main shaft 110, eliminating the need for clearance holes in the support plate 140 to avoid the connecting rods 120. This reduces production costs and improves the reliability of the flexible screen 400. The even number of second gears 152 can be two, four, or more.

[0162] After the first gear 151 and the second gear 152 are set, the inner surface of the support plate 140 can be provided with a clearance position to avoid the first gear 151, and the inner surface of the spindle 110 can be provided with a clearance position to avoid the second gear 152, so that the first gear 151 and the second gear 152 can be assembled on the spindle 110.

[0163] There are different implementations of the second gear 152. In some embodiments, see [reference needed]. Figure 14 , Figure 15 The second gear 152 is a single gear 152a. A single gear 152a means that there is one gear on a shaft. By using multiple single gears 152a, the distance between the pivot axes of the connecting rods 120 on both sides of the main shaft 110 can be increased.

[0164] In other embodiments, see Figures 19 to 21 The two second gears 152 are double gears 152b. Each double gear 152b includes a first tooth 1521 and a second tooth 1522 arranged coaxially. The first gear 151 and the first tooth 1521 of the double gear 152b located on both sides of the main shaft 110 mesh with each other, and the second tooth 1522 of the two double gears 152b mesh with each other.

[0165] The double gear 152b is a type of gear with two different diameters on a single shaft. By using a smaller number of double gears 152b, partial synchronous folding or synchronous unfolding on both sides of the main shaft 110 can be achieved, reducing reverse synchronous motion errors and increasing the distance between the pivot axes of the connecting rods 120 on both sides of the main shaft 110. This eliminates the need for the support plate 140 to have clearance holes to avoid the connecting rods 120, thereby improving the reliability of the flexible screen 400.

[0166] For example, two double gears 152b are arranged between two first gears 151, wherein the diameter of the first tooth 1521 in the double gear 152b is larger than the diameter of the second tooth 1522. Figure 19 , Figure 21 As shown, the first tooth 1521 and the second tooth 1522 can be axially offset. Or, as... Figure 20 As shown, the first tooth portion 1521 and the second tooth portion 1522 can also overlap axially. In both cases, the first tooth portion 1521 and the second tooth portion 1522 can be configured as incomplete gears, that is, only have protruding teeth in some areas, which is sufficient to meet the transmission requirements.

[0167] In other embodiments, the synchronization component 150 may also be a belt drive mechanism, in which two pulleys are correspondingly mounted on two connecting rods 120, the axis of the pulleys coincides with the pivot axis of the connecting rods 120, the drive belt is wound around the two pulleys and the drive belt is arranged in a figure-eight shape, and the synchronous folding or synchronous unfolding of the connecting rods 120 on both sides of the main shaft 110 is realized through the belt drive mechanism.

[0168] To enable the rotating shaft mechanism 100 to have a damping effect during the switching between the closed and unfolded states, in some embodiments, see [reference needed]. Figure 11 , Figure 12The rotating shaft mechanism 100 also includes a damping assembly 160 mounted on the main shaft 110. When the connecting rod 120 rotates relative to the main shaft 110, the damping assembly 160 is used to provide damping force to the connecting rod 120.

[0169] The damping assembly 160 provides damping force to the connecting rod 120, giving the moving component associated with the connecting rod 120 a damping effect. When the components on both sides of the main shaft 110 are in a closed, flattened, or intermediate state, external force is required to change the position of the components on both sides of the main shaft 110. When applied to the foldable device 1000, external force is required to adjust the relative position of the first housing 200 and the second housing 300. Without external force, the first housing 200 and the second housing 300 cannot rotate freely relative to each other.

[0170] In some embodiments, see Figure 22 , Figure 23 The ends of the plurality of first gears 151 have first cam portions 161. The damping assembly 160 includes a first integrated cam 162 and a first elastic member 163. The first integrated cam 162 is movable relative to the first cam portion 161 along the axial direction of the first gear 151. The first integrated cam 162 has a second cam portion 1621 that can mesh with the first cam portion 161. The first elastic member 163 can act on the first integrated cam 162 to press the second cam portion 1621 against the first cam portion 161.

[0171] The first cam portion 161 and the second cam portion 1621 have the same structure. Taking the first cam portion 161 as an example, each first cam portion 161 has protrusions 161a and recesses 161b distributed alternately in the circumferential direction. When the protrusions 161a of the first cam portion 161 slide into the recesses 1621b of the second cam portion 1621, the protrusions 1621a of the second cam portion 1621 also slide into the recesses 161b of the first cam portion 161, that is, the first cam portion 161 and the second cam portion 1621 are engaged. Each protrusion in the first cam portion 161 and the second cam portion 1621 has a top surface and two opposite side surfaces, and the side surfaces of the protrusions can be inclined surfaces.

[0172] The first elastic element 163 may be a spring or other elastic element. One or more first elastic elements 163 may be configured to change the damping force between the mating cam portions.

[0173] Under the action of the first elastic member 163, the second cam portion 1621 remains pressed against the first cam portion 161. When the connecting rod 120 rotates relative to the main shaft 110, the first cam portion 161 on the first gear 151 rotates relative to the second cam portion 1621 of the first connecting cam 162. When the top surface of the protrusion 161a of the first cam portion 161 and the top surface of the protrusion 1621a of the second cam portion 1621 abuts, the compression of the first elastic member 163 is large, and a large damping force is formed between the first cam portion 161 and the second cam portion 1621. When the protrusion 161a of the first cam portion 161 slides into the recess 1621b of the second cam portion 1621, the first elastic element 163 is compressed, and a certain damping force is generated between the first cam portion 161 and the second cam portion 1621. The first cam portion 161 and the second cam portion 1621 remain engaged. At this time, the connecting rod 120 and the main shaft 110 remain relatively stationary, and the closed state or flattened state of the rotating shaft mechanism 100 can be realized.

[0174] When the rotating shaft mechanism 100 switches from the intermediate state to the flattened state or the closed state, the protrusion 161a of the first cam portion 161 tends to slide into the recess 1621b of the second cam portion 1621. The side of the protrusion 161a of the first cam portion 161 and the side of the protrusion 1621a of the second cam portion 1621 make corresponding contact and generate a small damping force. Under the action of the first elastic member 163, the first cam portion 161 continues to rotate so that the protrusion 161a of the first cam portion 161 slides into the recess 1621b of the second cam portion 1621, that is, the first cam portion 161 and the second cam portion 1621 mesh, realizing the self-expanding or self-closing movement of the connecting rod 120 relative to the main shaft 110, realizing the foldable device 1000 to self-expand when near the flattened state or self-close when near the closed state.

[0175] The number of protrusions 161a in the first cam portion 161 and the number of protrusions 1621a in the second cam portion 1621 can be equal, and the specific number is not limited. For example, the first cam portion 161 has three protrusions 161a and three recesses 161b, and the second cam portion 1621 has three protrusions 1621a and three recesses 1621b. Under the action of the first elastic member 163, the first cam portion 161 and the second cam portion 1621 cooperate to provide damping force to the connecting rod 120, so as to realize the self-expanding or self-closing movement of the connecting rod 120 relative to the main shaft 110.

[0176] In some embodiments, see Figure 11 , Figure 22 , Figure 23The damping assembly 160 also includes a bracket 164 and a first rod 1641 coaxially connected to the first gear 151; the bracket 164 is fixed on the main shaft 110; the two ends of the first rod 1641 are mounted on the bracket 164, and the first integrated cam 162 is slidably mounted on the first rod 1641.

[0177] The first rod 1641 is mounted on the bracket 164, which is fixed to the main shaft 110. This allows the first integrated cam 162 to move along the extension direction of the first rod 1641. Under the action of the first elastic element 163, the second cam portion 1621 of the first integrated cam 162 presses against the first cam portion 161 on the connecting rod 120. This structure is simple and reliable. The bracket 164 can be fixed to the main shaft 110 by bonding, fasteners (such as screws), or the bracket 164 and the main shaft 110 can be an integral structure.

[0178] In some embodiments, the bracket 164 includes a first bracket 164a and a second bracket 164b distributed axially on both sides of the first gear 151. The first rod 1641 and the first gear 151 can be synchronously rotatably connected or integrally formed. The first rod 1641 passes through the first bracket 164a, the first integrated cam 162 and the second bracket 164b. The first rod 1641 has a head 1641a and a snap-fit ​​connector 1641b disposed opposite to each other. The head 1641a of the first rod 1641 is snapped outside the first bracket 164a. The snap-fit ​​connector 1641b of the first rod 1641 and the limiting member 169 cooperate to limit it outside the second bracket 164b. The size of the head 1641a and the limiting member 169 of the first rod 1641 is larger than the size of the hole on the bracket 164 through which the first rod 1641 passes, thereby limiting the first rod 1641 axially and mounting it on the first bracket 164a and the second bracket 164b. The first support 164a and the second support 164b can be independent structures or integrated structures.

[0179] When assembling the first rod 1641 and the limiting member 169, one end of the first rod 1641 with the snap-fit ​​connector 1641b passes through the bracket 164. The snap-fit ​​connector 1641b and the slot 1691 of the limiting member 169 engage. Under the action of the first elastic member 163, the first rod 1641 is axially limited on the bracket 164, preventing axial movement and improving reliability. The snap-fit ​​connector 1641b can be T-shaped or other shapes. The limiting member 169 can have multiple slots 1691 to achieve corresponding snap-fit ​​engagement between the snap-fit ​​connectors 1641b and multiple slots 1691 of the multiple first rods 1641, simplifying the structure.

[0180] There are optional implementation methods when configuring the first integrated cam 162 and the first elastic element 163.

[0181] See Figure 22 , Figure 23 The first type is arranged on one side of the first gear 151, and the number of the first integrated cam 162 and the first elastic element 163 is one, with each first gear 151 having a first cam portion 161.

[0182] See Figure 24 , Figure 25 The second type is arranged on both sides of the first gear 151, with two first integrated cams 162 and two first elastic elements 163. Each first gear 151 has two back-to-back first cam portions 161, and a set of first integrated cams 162 and first elastic elements 163 are arranged on both sides of the first gear 151 in the axial direction.

[0183] Both of these methods can cause the second cam portion 1621 of the first integrated cam 162 to press against the corresponding first cam portion 161, thereby achieving a damping effect when the rotating shaft mechanism 100 switches between the closed and flat states. When two sets of first integrated cams 162 and first elastic elements 163 are configured, the damping force of the rotating shaft mechanism 100 when switching between the closed and flat states can be increased within a limited space.

[0184] To enable the rotating shaft mechanism 100 to be used in space-constrained applications and to satisfy the damping effect of the rotating shaft mechanism 100 when switching between the closed and unfolded states, in some embodiments, see [reference needed]. Figure 22 , Figure 23 The damping assembly 160 further includes a second integrated cam 165 and a single cam 166 spaced apart from the first cam portion 161. The second integrated cam 165 is slidably mounted on the first rod 1641, and the single cam 166 and the first rod 1641 are synchronously rotatably connected. The second integrated cam 165 has a third cam portion 1651 that can mesh with the single cam 166. A first elastic member 163 is compressed and disposed between the first integrated cam 162 and the second integrated cam 165. The first elastic member 163 is sleeved outside the first rod 1641, and can act on the second integrated cam 165 to press the third cam portion 1651 against the single cam 166.

[0185] Among them, the third cam portion 1651 of the single cam 166 and the second integrated cam 165 has a structure similar to that of the first cam portion 161, that is, both the single cam 166 and the third cam portion 1651 have protrusions and recesses that are staggered along the circumferential direction.

[0186] The single cam 166 and the first rod 1641 are synchronously rotated and connected, which can be a profile connection or a key connection. When a profile connection is used, the first rod 1641 has a non-circular cross-section (such as D-shaped, square, etc.), and the single cam 166 has a hole with a matching non-circular cross-section. When the first rod 1641 passes through the hole of the single cam 166, a synchronous rotational connection is formed between the first rod 1641 and the single cam 166.

[0187] The rotation of the first gear 151 is transmitted to the single cam 166 via the first rod 1641, meaning that the single cam 166 and the first gear 151 rotate synchronously. The cooperation relationship and working process between the third cam portion 1651 of the second integrated cam 165 and the single cam 166 are similar to the cooperation relationship and working process between the second cam portion 1621 and the first cam portion 161 of the first integrated cam 162. Within a smaller space, by adding the second integrated cam 165 and the single cam 166, the damping force of the rotating shaft mechanism 100 when switching between the closed and flattened states is increased, reducing wear on the mating cam surfaces and extending the service life of the equipment.

[0188] Under the action of the first elastic element 163, the third cam portion 1651 remains pressed against the single cam 166, which is limited by the bracket 164. When the connecting rod 120 rotates relative to the main shaft 110, the first gear 151 drives the single cam 166 to rotate relative to the third cam portion 1651 of the second integrated cam 165 through the first rod 1641. When the top surface of the protrusion of the single cam 166 abuts against the top surface of the protrusion of the third cam portion 1651, a large damping force is generated between the single cam 166 and the third cam portion 1651. When the protrusion of the single cam 166 slides into the recess of the third cam 1651, the first elastic element 163 is compressed, and a certain damping force is generated between the single cam 166 and the third cam 1651. The single cam 166 and the third cam 1651 remain engaged. At this time, the connecting rod 120 and the main shaft 110 remain relatively stationary, which can realize the closed state or the flattened state of the rotating shaft mechanism 100.

[0189] When the rotating shaft mechanism 100 switches from the intermediate state to the flattened state or the closed state, the protrusion of the single cam 166 tends to slide into the recess of the third cam 1651. The side of the protrusion of the single cam 166 and the side of the protrusion of the third cam 1651 make corresponding contact and generate a small damping force. Under the action of the first elastic member 163, the single cam 166 continues to rotate so that the protrusion of the single cam 166 slides into the recess of the third cam 1651, that is, the single cam 166 and the third cam 1651 mesh, realizing the self-expanding or self-closing movement of the connecting rod 120 relative to the main shaft 110, realizing the self-expanding of the foldable device 1000 when it is close to the flattened state or the self-closing of the device when it is close to the closed state.

[0190] The number of protrusions in the third cam portion 1651 and the number of protrusions in the single cam 166 can be equal, and the specific number is not limited. For example, the third cam portion 1651 has three protrusions and three recesses, and the single cam 166 has three protrusions and three recesses. Under the action of the first elastic member 163, the third cam portion 1651 and the single cam 166 cooperate to provide damping force to the connecting rod 120, so as to realize the self-expanding or self-closing movement of the connecting rod 120 relative to the main shaft 110.

[0191] Since the bracket 164 is fixed on the main shaft 110, the first rod 1641 is installed on the bracket 164, and the first elastic element 163 is compressed between the first integrated cam 162 and the second integrated cam 165 and sleeved on the first rod 1641. All other components of the damping assembly 160 except the bracket 164 are limited along the extension direction of the first rod 1641. During the switching between the flat and closed states of the rotating shaft mechanism 100, the first rod 1641 does not move axially, resulting in high reliability.

[0192] See Figure 5 , Figure 26 As mentioned earlier, a pivot mechanism 10 of the related technology achieves a hovering effect by setting a first cam 17 on the connecting rod 13. A second cam 18 is pressed against the first cam 17 by an elastic element (not shown). The side of the protrusion of the first cam 17 and the side of the protrusion of the second cam 18 provide damping force by pressing together. Under the action of the elastic element, the first cam 17 and the second cam 18 tend to mesh, thereby achieving the hovering effect of the connecting rod 13 relative to the main shaft 11.

[0193] In order to enable the pivot mechanism 100 in the intermediate state to achieve a reliable hovering effect at a predetermined position, such as when the first housing 200 and the second housing 300 are applied to a foldable device 1000, the pivot mechanism 100 of this application has different implementation methods.

[0194] The first method to achieve hovering is: See Figure 22 , Figure 23 The damping assembly 160 further includes a hovering cam 167, a second elastic element 168, and a second rod 1642. The second gear 152, the hovering cam 167, and the second rod 1642 are synchronously rotatably connected. The second integrated cam 165 has a fourth cam portion 1652 corresponding to at least one second gear 152. The fourth cam portion 1652 and the hovering cam 167 can mesh accordingly. The second elastic element 168 is compressed and disposed between the first integrated cam 162 and the hovering cam 167. The second elastic element 168 is sleeved outside the second rod 1642. The second elastic element 168 can act on the hovering cam 167 to press the hovering cam 167 against the fourth cam portion 1652.

[0195] Among them, the hovering cam 167 and the fourth cam portion 1652 have a structure similar to that of the first cam portion 161, that is, both the hovering cam 167 and the fourth cam portion 1652 have protrusions and recesses distributed in an alternating manner along the circumference, and the number of protrusions and recesses may be different from that on the first cam portion 161.

[0196] The second gear 152 and the hovering cam 167 are synchronously connected to the second rod 1642, and can be connected by a profile or a key. The second gear 152 and the second rod 1642 can be an integral structure. The two ends of the second rod 1642 are rotatably mounted on the bracket 164.

[0197] The second elastic element 168 can be a spring or other elastic element. One or more second elastic elements 168 can be configured to change the damping force between the mating cam portions.

[0198] The rotation of the second gear 152 is transmitted to the hovering cam 167 via the second rod 1642, meaning the hovering cam 167 and the second gear 152 rotate synchronously. Under the action of the second elastic element 168, the hovering cam 167 remains pressed against the fourth cam portion 1652. When the connecting rod 120 rotates relative to the main shaft 110, the first gear 151 and the second gear 152 rotate. The second gear 152 drives the hovering cam 167 to rotate relative to the fourth cam portion 1652 of the second integrated cam 165 via the second rod 1642. When the connecting rod 120 rotates to a predetermined angle position, it engages... Figure 27 In (a) and (b), when the protrusion 167a of the hovering cam 167 slides into the recess 1652b of the fourth cam portion 1652, the second elastic element 168 is compressed, and a certain damping force is generated between the hovering cam 167 and the fourth cam portion 1652. The hovering cam 167 and the fourth cam portion 1652 remain engaged. At this time, the connecting rod 120 and the main shaft 110 remain relatively stationary, which enables the rotating shaft mechanism 100 to achieve a reliable hovering effect at a predetermined position and reduces the wear between the mating cams.

[0199] By adjusting the number of fourth cam portions 1652 on the hovering cam 167 and the second integrated cam 165, the damping force required to achieve the hovering effect can be changed. For example, see [reference needed]. Figure 22 , Figure 23 The two second gears 152 are respectively provided with hovering cams 167, second elastic elements 168 and second rods 1642, and two fourth cam parts 1652 are respectively provided on the second integrated cam 165, which can provide the damping force required for the hovering effect.

[0200] By adjusting the relative positions of the protrusions of the hovering cam 167 and the fourth cam portion 1652, the specific position at which the rotating shaft mechanism 100 achieves the hovering effect can be changed. The number of protrusions in both the hovering cam 167 and the fourth cam portion 1652 can be equal, and the specific number is not limited. For example, the hovering cam 167 has two protrusions and two recesses, and the fourth cam portion 1652 also has two protrusions and two recesses. Under the action of the second elastic member 168, the hovering cam 167 and the fourth cam portion 1652 cooperate to provide a damping force to achieve the hovering effect, keeping the rotating shaft mechanism 100 in a predetermined position.

[0201] When two or more second gears 152 are configured, the other second gears 152 can be connected to the third rod 1643 respectively. The third rod 1643 can be mounted on the bracket 164 similarly to the first rod 1641. A first elastic element 163 can be sleeved on the outside of the third rod 1643, so that the first elastic element 163 is compressed and disposed between the first integrated cam 162 and the second integrated cam 165, so as to increase the thrust on the integrated cam and thus increase the damping force between the mating cams.

[0202] When the third cam portion 1651 and the fourth cam portion 1652 are provided on the second integrated cam 165, the third cam portion 1651 and the fourth cam portion 1652 can be respectively provided on opposite sides of the second integrated cam 165. Under the action of the first elastic member 163, the single cam 166 and the third cam portion 1651 are engaged. Under the action of the second elastic member 168, the fourth cam portion 1652 and the hovering cam 167 are engaged. The single cam 166 is limited by the bracket 164, generating a damping force between the engaged cam portions. In addition, the third cam portion 1651 and the fourth cam portion 1652 can be provided on the same side of the second integrated cam 165.

[0203] The second way to achieve hovering is: see [link / reference] Figure 24 , Figure 25 The damping assembly 160 also includes a hovering cam 167, a second elastic element 168, and a second rod 1642. The second gear 152, the hovering cam 167, and the second rod 1642 are synchronously rotatably connected. The first integrated cam 162 has a fifth cam portion 1622 corresponding to at least one second gear 152. The fifth cam portion 1622 and the hovering cam 167 can mesh accordingly. The second elastic element 168 is compressed and disposed between the bracket 164 and the hovering cam 167. The second elastic element 168 is sleeved outside the second rod 1642. The second elastic element 168 can act on the hovering cam 167 to press the hovering cam 167 against the fifth cam portion 1622.

[0204] Among them, the hovering cam 167 and the fifth cam portion 1622 have a structure similar to that of the first cam portion 161, that is, both the hovering cam 167 and the fifth cam portion 1622 have protrusions and recesses distributed alternately in the circumferential direction, and the number of protrusions and recesses may be different from that on the first cam portion 161.

[0205] The second gear 152 and the hovering cam 167 are synchronously connected to the second rod 1642, and can be connected by a profile or a key. The second gear 152 and the second rod 1642 can be an integral structure. The two ends of the second rod 1642 are rotatably mounted on the bracket 164.

[0206] The second elastic element 168 can be a spring or other elastic element. One or more second elastic elements 168 can be configured to change the damping force between the mating cam portions.

[0207] The rotation of the second gear 152 is transmitted to the hovering cam 167 via the second rod 1642, meaning the hovering cam 167 and the second gear 152 rotate synchronously. Under the action of the second elastic element 168, the hovering cam 167 remains pressed against the fifth cam portion 1622. When the connecting rod 120 rotates relative to the main shaft 110, the first gear 151 and the second gear 152 rotate. The second gear 152 drives the hovering cam 167 to rotate relative to the fifth cam portion 1622 of the second integrated cam 165 via the second rod 1642. When the connecting rod 120 rotates to the predetermined angle position, the protrusion of the hovering cam 167 slides into the recess of the fifth cam portion 1622, the second elastic element 168 is compressed, and a certain damping force is generated between the hovering cam 167 and the fifth cam portion 1622. The hovering cam 167 and the fifth cam portion 1622 remain engaged. At this time, the connecting rod 120 and the main shaft 110 remain relatively stationary, which enables the rotating shaft mechanism 100 to achieve a reliable hovering effect at the predetermined position and reduces the wear between the mating cams.

[0208] The damping force required to achieve the hovering effect can be changed by adjusting the number of fifth cam portions 1622 on the hovering cam 167 and the second integrated cam 165. For example, see [reference needed]. Figure 24 , Figure 25 The two second gears 152 are respectively provided with hovering cams 167, second elastic elements 168 and second rods 1642, and two fifth cam parts 1622 are respectively provided on the second integrated cam 165, which can provide the damping force required for the hovering effect.

[0209] By adjusting the relative positions of the protrusions of the hovering cam 167 and the fifth cam portion 1622, the specific position at which the rotating shaft mechanism 100 achieves the hovering effect can be changed. The number of protrusions in both the hovering cam 167 and the fifth cam portion 1622 can be equal, and the specific number is not limited. For example, the hovering cam 167 has two protrusions and two recesses, and the fifth cam portion 1622 also has two protrusions and two recesses. Under the action of the second elastic member 168, the hovering cam 167 and the fifth cam portion 1622 cooperate to provide a damping force to achieve the hovering effect, keeping the rotating shaft mechanism 100 in a predetermined position.

[0210] When two or more second gears 152 are configured, the other second gears 152 can be connected to the third rod 1643 respectively. The third rod 1643 can be mounted on the bracket 164 similarly to the first rod 1641. A first elastic element 163 can be sleeved on the outside of the third rod 1643, so that the first elastic element 163 is compressed and disposed between the first integrated cam 162 and the second integrated cam 165, so as to increase the thrust on the integrated cam and thus increase the damping force between the mating cams.

[0211] When there are two first integrated cams 162, a set of first integrated cams 162, a hovering cam 167, and a second elastic member 168 are respectively arranged on both sides of the axis of the second gear 152. Each first integrated cam 162 has a fifth cam portion 1622 corresponding to the hovering cam 167. The second elastic member 168 acts on the corresponding hovering cam 167, causing the hovering cam 167 to press against the fifth cam portion 1622. Within a limited space, the damping force when the rotating shaft mechanism 100 hovers at a predetermined position is increased, and the rotating shaft mechanism 100 can reliably hover.

[0212] When the second cam portion 1621 and the fifth cam portion 1622 are set on the first integrated cam 162, the second cam portion 1621 and the fifth cam portion 1622 can be respectively set on opposite sides of the first integrated cam 162. Under the action of the first elastic member 163, the second cam portion 1621 and the first cam portion 161 are engaged. Under the action of the second elastic member 168, the fifth cam portion 1622 and the hovering cam 167 are engaged, and a damping force is generated between the engaged cam portions.

[0213] When the fifth cam portion 1622 is provided on the first integrated cam 162, the side of the first integrated cam 162 facing away from the second gear 152 is provided with a groove 1623, and the fifth cam portion 1622 is provided on the surface of the groove 1623. In this way, the hovering cam 167 that cooperates with the fifth cam portion 1622 can be partially located in the groove 1623, making full use of the space between the bracket 164 and the first integrated cam 162, so that a longer second elastic member 168 can be installed on the second rod 1642 to provide greater elastic force, thereby increasing the damping force between the hovering cam 167 and the fifth cam portion 1622.

[0214] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotating shaft mechanism, characterized in that, include: Main spindle, multiple connecting rods, paired fixed frames, and paired support plates; One or more of the connecting rods are respectively disposed on both sides of the main shaft along an axial direction perpendicular to the main shaft, and one end of each connecting rod is pivotally connected to the main shaft; Each pair of the fixing frames is respectively provided on both sides of the main shaft along an axial direction perpendicular to the main shaft. The fixing frames located on the same side of the main shaft are correspondingly provided with the connecting rod, and the connecting rod is slidably connected to the fixing frame corresponding to the connecting rod. Each pair of support plates is respectively disposed on both sides of the main shaft along an axial direction perpendicular to the main shaft, and the support plates on the same side of the main shaft are correspondingly disposed with the fixing frame; one end of each support plate is pivotally connected to the main shaft, and the other end is pivotally connected to the fixing frame corresponding to the support plate; the pivot axes of the connecting rod and the support plate on the main shaft are spaced apart from each other. The fixed brackets located on both sides of the main shaft can rotate relative to the main shaft, so that the rotating shaft mechanism can switch between a flattened state and a closed state; During the process of the rotating shaft mechanism switching from the flattened state to the closed state, the fixed frames located on both sides of the main shaft rotate towards each other. The fixed frames drive the connecting rods and support plates corresponding to the fixed frames to rotate, so that a screen-accommodating space is formed between the support plates located on both sides of the main shaft and the main shaft.

2. The rotating shaft mechanism according to claim 1, characterized in that, During the process of the rotating shaft mechanism switching from the closed state to the flattened state, the fixed frames located on both sides of the main shaft rotate in opposite directions. The fixed frames drive the connecting rods and support plates corresponding to the fixed frames to rotate, so that the support plates located on both sides of the main shaft are flush and can cover one side of the main shaft.

3. The rotating shaft mechanism according to claim 1, characterized in that, The pivot axes of the connecting rods located on both sides of the main shaft are symmetrically arranged on both sides of the pivot axis of the pair of support plates on the main shaft.

4. The rotating shaft mechanism according to claim 1, characterized in that, When the rotating shaft mechanism is in the closed state, the connecting rod is located on the side of the support plate opposite to the screen space, and the distance between the pivot axes of the connecting rods on both sides of the main shaft is greater than the distance between the paired support plates near the main shaft.

5. The rotating shaft mechanism according to claim 1, characterized in that, The connecting rod and the main shaft are pivotally connected. Alternatively, the connecting rod and the main shaft may be connected by a virtual axis.

6. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that, The fixing frame has a first sliding part, and the connecting rod corresponding to the fixing frame has a second sliding part. The first sliding part and the second sliding part are slidably engaged so that the connecting rod is slidably connected to the fixing frame.

7. The rotating shaft mechanism according to claim 6, characterized in that, The first sliding part is a guide groove provided on the fixed frame, and the second sliding part is a guide arm provided on the connecting rod, and the guide arm is slidably installed in the guide groove; Alternatively, the first sliding part is a guide arm provided on the fixed frame, and the second sliding part is a guide groove provided on the connecting rod, with the guide arm slidably mounted in the guide groove.

8. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that, Each of the support plates has one or more first arc arms, and the main shaft has one or more first arc grooves corresponding to the one or more first arc arms. The one or more first arc arms are slidably mounted in the one or more first arc grooves so that the support plate is pivotally connected to the main shaft. Alternatively, the support plate and the main shaft are pivotally connected.

9. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that, Each of the support plates has one or more second arc arms, and the fixing frame has one or more second arc grooves corresponding to the one or more second arc arms. The one or more second arc arms are slidably mounted in the one or more second arc grooves so that the support plate is pivotally connected to the fixing frame. Alternatively, the support plate and the fixing frame may be pivotally connected.

10. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that, The rotating shaft mechanism also includes a synchronization component disposed on the main shaft, which enables the connecting rods located on both sides of the main shaft to rotate synchronously in opposite directions.

11. The rotating shaft mechanism according to claim 10, characterized in that, The synchronization component includes a first gear fixed to the connecting rods located on both sides of the main shaft. The pivot axis of each connecting rod coincides with the axis of the first gear corresponding to the connecting rod, and the first gears located on both sides of the main shaft are in transmission engagement.

12. The rotating shaft mechanism according to claim 11, characterized in that, The synchronization component also includes an even number of sequentially meshing second gears, with the first gear located on both sides of the main shaft being driven by an even number of second gears.

13. The rotating shaft mechanism according to claim 12, characterized in that, The second gear is a single gear; Alternatively, the two second gears are double gears, each of the double gears including a first tooth and a second tooth arranged coaxially, the first gear located on both sides of the main shaft and the first tooth of the double gear meshing with each other, and the second tooth of the two double gears meshing with each other.

14. The rotating shaft mechanism according to claim 12 or 13, characterized in that, The rotating shaft mechanism also includes a damping assembly mounted on the main shaft. When the connecting rod rotates relative to the main shaft, the damping assembly provides a damping force to the connecting rod.

15. The rotating shaft mechanism according to claim 14, characterized in that, The ends of the plurality of first gears have first cam portions, the damping assembly includes a first integrated cam and a first elastic member, the first integrated cam is movable relative to the first cam portion along the axial direction of the first gear, the first integrated cam has a second cam portion that can mesh with the first cam portion, and the first elastic member can act on the first integrated cam to press the second cam portion against the first cam portion.

16. The rotating shaft mechanism according to claim 15, characterized in that, The damping assembly further includes a bracket and a first rod coaxially connected to the first gear; the bracket is fixed on the main shaft; both ends of the first rod are mounted on the bracket, and the first integrated cam is slidably mounted on the first rod.

17. The rotating shaft mechanism according to claim 16, characterized in that, The number of the first integrated cam and the first elastic element is one, and each of the first gears has one first cam portion; Alternatively, the number of the first integrated cam and the first elastic element are both two, each of the first gears has two back-to-back first cam portions, and a set of the first integrated cam and the first elastic element are respectively arranged on both sides of the first gear in the axial direction.

18. The rotating shaft mechanism according to claim 16 or 17, characterized in that, The damping assembly further includes a second integrated cam and a single cam spaced apart from the first cam portion. The second integrated cam is slidably mounted on the first rod, and the single cam and the first rod are synchronously rotatably connected. The second integrated cam has a third cam portion that can mesh with the single cam. The first elastic element is compressed and disposed between the first integrated cam and the second integrated cam. The first elastic element is sleeved outside the first rod. The first elastic element can act on the second integrated cam to press the third cam portion against the single cam.

19. The rotating shaft mechanism according to claim 18, characterized in that, The damping assembly further includes a hovering cam, a second elastic element, and a second rod. The second gear, the hovering cam, and the second rod are synchronously rotatably connected. The second integrated cam has a fourth cam portion corresponding to at least one of the second gears, and the fourth cam portion and the hovering cam can mesh accordingly. The second elastic element is compressed and disposed between the first integrated cam and the hovering cam. The second elastic element is sleeved outside the second rod. The second elastic element can act on the hovering cam to press the hovering cam towards the fourth cam portion.

20. The rotating shaft mechanism according to claim 16 or 17, characterized in that, The damping assembly further includes a hovering cam, a second elastic element, and a second rod. The second gear, the hovering cam, and the second rod are synchronously rotatably connected. The first integrated cam has a fifth cam portion corresponding to at least one of the second gears, and the fifth cam portion and the hovering cam can mesh accordingly. The second elastic element is compressed between the bracket and the hovering cam, and is sleeved outside the second rod. The second elastic element can act on the hovering cam to press the hovering cam against the fifth cam portion.

21. A foldable device, characterized in that, The device includes a rotating shaft mechanism, a first housing, a second housing, and a flexible screen as described in any one of claims 1 to 20. The rotating shaft mechanism is located between the first housing and the second housing. The fixing frame located on one side of the main shaft is fixed to the first housing, and the fixing frame located on the other side of the main shaft is fixed to the second housing. The two ends of the flexible screen are respectively fixed to the first housing and the second housing, and the middle area of ​​the flexible screen is provided corresponding to the rotating shaft mechanism.

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