Folding device rotating assembly and folding device

Abstract

The application relates to the field of folding structures, aims to solve the problem that the folding synchronization structure of the known technology has a large thickness requirement and influences the thinning of a folding device, and provides a folding device rotating assembly and a folding device adopting the folding device rotating assembly. The folding device rotating assembly comprises a base, a first rotating piece, a second rotating piece and a connecting rod structure connected between the first rotating piece and the second rotating piece, the connecting rod structure can realize synchronous reverse rotation of two bodies of the folding device, realizes folding or unfolding of the folding device, and the connecting rod structure does not adopt a gear, which is beneficial to the thinning of the folding device.

Description

[0001] Cross-reference to related applications

[0002] This application is a divisional application of the invention patent with application number 202210261686.4, application date of 2022-03-16, and application title of "Folding Equipment Rotating Component and Folding Equipment". Technical Field

[0003] This application relates to the field of folding structures, and more specifically, to a rotating assembly for a folding device and a folding device. Background Technology

[0004] It is known that the folding mechanism of foldable mobile phones, laptops, tablets, laptop accessories, tablet accessories, mobile phone accessories, etc., is based on gears.

[0005] As the overall size of the machine is reduced, the diameter of the gears needs to be continuously reduced. However, the overall size of the gears is limited by the tooth width and tooth thickness, making it difficult to further reduce their size, which is not conducive to the design of folding equipment with small thickness. Summary of the Invention

[0006] This application provides a rotating assembly for a folding device and a folding device to solve the problem that the thickness requirement of the folding synchronization structure in the known technology is large, which affects the thinning of the folding device.

[0007] In a first aspect, embodiments of this application provide a rotating assembly for a folding device, including a base, a first rotating member, a second rotating member, and a synchronous transmission member. The first rotating member and the second rotating member are disposed opposite to each other and rotatably connected to the base. The synchronous transmission member includes an integrally formed transmission part, a first connecting part, and a second connecting part; the first connecting part is rotatably fitted to a first rotation center of the base, and the second connecting part is rotatably fitted to a second rotation center of the base; the first connecting part and the second connecting part are centrally symmetrical about the midpoint of the line connecting the first rotation center and the second rotation center, and are respectively connected to both ends of the transmission part; the portion of the transmission part connecting to the first connecting part and the portion of the transmission part connecting to the second connecting part are elastic structures, and elastic deformation can occur between the first connecting part and the transmission part, and between the second connecting part and the transmission part, so that the rotation of the first connecting part around the first rotation center can drive the second connecting part to rotate synchronously in the opposite direction around the second rotation center through the transmission part. The first rotating member is driven to the first connecting part, and the second rotating member is driven to the second connecting part, so that the rotation of the first rotating member relative to the base can drive the first connecting part to rotate relative to the first rotation center, thereby driving the second connecting part to rotate in the opposite direction to the first connecting part, and thus driving the second rotating member to rotate relative to the base in the opposite direction to the rotation direction of the first rotating member.

[0008] In the application embodiment, the rotating assembly of the folding device is used such that the first rotating member and the second rotating member are respectively connected to the two bodies of the folding device. When either body rotates, the rotation can be transmitted to the other body through the rotating assembly, causing the other body to rotate synchronously in the opposite direction, thereby realizing the change from the unfolded state to the folded state of the two bodies. For example, when the body connected to the first rotating member rotates, the rotation will cause the first rotating member to rotate, which in turn causes the first connecting part to rotate relative to the first rotation center of the base. Since the first connecting part and the second connecting part are centrally symmetrical, and with the connection of the transmission part, the rotation of the first connecting part can drive the second connecting part to rotate around the second rotation center in the opposite direction to the rotation direction of the first connecting part through the transmission part. This, in turn, drives the body connected to the second transmission part to rotate synchronously in the opposite direction to the rotation direction of the first rotating member, realizing the synchronous folding of the two bodies towards each other or unfolding in opposite directions.

[0009] In this embodiment, a single synchronous transmission component is used to achieve synchronous transmission between the first rotating component and the second rotating component. There is no limitation of gear structure, which is conducive to the thin design of folding equipment. In addition, the single synchronous transmission component reduces the assembly steps and improves the assembly effect.

[0010] In one embodiment, the transmission part includes an intermediate plate segment, a first connecting arc segment, and a second connecting arc segment. The first connecting arc segment connects the intermediate plate segment and a first connecting portion, and the second connecting arc segment connects the intermediate plate segment and the second connecting portion. The intermediate plate segment has a shape in which the width gradually decreases from the middle to both ends. The first connecting arc segment is an elastic structure to allow relative rotation between the intermediate plate segment and the first connecting portion, and the second connecting arc segment is an elastic structure to allow relative rotation between the intermediate plate segment and the second connecting portion. The first connecting arc segment includes a first connecting arc strip and a second connecting arc strip. The first connecting arc strip is arc-shaped, with one end of the first connecting arc strip connected to the intermediate plate segment tangent to the extension direction of the intermediate plate segment, and the other end of the first connecting arc strip connected to the first connecting portion. The second connecting arc strip is located on the side of the first connecting arc strip closer to the intermediate plate segment, with one end of the second connecting arc strip connected to the connection point between the first connecting arc strip and the intermediate plate segment, and the other end connected to the first connecting portion. The connection point between the second connecting arc strip and the first connecting portion is located inside the connection point between the first connecting arc strip and the first connecting portion. The second connecting arc segment includes a third connecting arc strip and a fourth connecting arc strip. The third connecting arc strip is arc-shaped, and one end of the third connecting arc strip is tangent to the extension direction of the intermediate plate segment. The other end of the third connecting arc strip is connected to the second connecting part. The fourth connecting arc strip is located on the side of the third connecting arc strip closer to the intermediate plate segment, and one end of the fourth connecting arc strip is connected to the connection point between the third connecting arc strip and the intermediate plate segment, and the other end is connected to the second connecting part. The connection point between the fourth connecting arc strip and the second connecting part is located inside the connection point between the third connecting arc strip and the second connecting part.

[0011] In this embodiment, the intermediate plate segment is connected to the first connecting part via a first connecting arc and a second connecting arc, respectively, allowing the intermediate plate segment to rotate relative to the first connecting part at a certain angle through the elastic deformation of the first and second connecting arcs. The intermediate plate segment is also connected to the second connecting part via a third and a fourth connecting arc, allowing the intermediate plate segment to rotate relative to the second connecting part at a certain angle through the elastic deformation of the third and fourth connecting arcs. Combined, these two connections enable the transmission unit to transmit the rotation of the first and second connecting parts. Furthermore, the symmetrical arrangement of the synchronous transmission components ensures that the rotation of the first and second connecting parts is synchronized and in opposite directions. Additionally, the second connecting arc is located inside the first connecting arc, supporting it and reducing the degree of deformation of the first connecting arc towards the first rotation center under pressure, thus maintaining a certain structural shape and ensuring accurate transmission by the synchronous transmission component. Similarly, the fourth connecting arc is located inside the third connecting arc, supporting it and reducing the degree of deformation of the third connecting arc towards the second rotation center under pressure, thus maintaining a certain structural shape and ensuring accurate transmission by the synchronous transmission component.

[0012] In one embodiment, the first connecting arc, the second connecting arc, the third connecting arc, and the fourth connecting arc are all arc-shaped, and the bending center is located on the side closer to the middle plate segment; the width of the first connecting arc, the second connecting arc, the third connecting arc, and the fourth connecting arc is 1.0-3.0mm.

[0013] In this embodiment, the bending center is located near the middle plate segment, allowing for a smooth transition between each connecting arc segment and reducing stress concentration during elastic deformation transmission of the synchronous transmission component. Each connecting arc segment is provided with an appropriate width, ensuring that the synchronous transmission component maintains a certain structural strength while undergoing elastic deformation under stress.

[0014] In one embodiment, the intermediate plate segment is rhomboid in shape.

[0015] In this embodiment, the middle plate segment is centrally symmetrical, which is beneficial for the symmetrical transmission of motion and force.

[0016] In one embodiment, the synchronous transmission component is formed by cutting sheet metal, or by powder metallurgy, or by 3D printing.

[0017] In this embodiment, a compliant integrated synchronous transmission component can be obtained through these methods.

[0018] In one embodiment, the rotating assembly of the folding device further includes a first rotating shaft and a second rotating shaft. The central axis of the first rotating shaft passes through a first rotation center, the first rotating shaft is rotatably connected to a base, and has a first protruding rod extending out of the base; a first connecting portion is fixedly sleeved on the first protruding rod. The central axis of the second rotating shaft passes through a second rotation center, the second rotating shaft is rotatably connected to the base, and has a second protruding rod extending out of the base; a second connecting portion is fixedly sleeved on the second protruding rod.

[0019] In this embodiment, a first rotating shaft / second rotating shaft is provided to facilitate the installation of synchronous transmission components or other structures on them, so as to achieve rotational engagement with the base.

[0020] In one embodiment, the first rotating member has a first groove extending in a direction perpendicular to the rotation axis of the first rotating member. The second rotating member has a second groove extending in a direction perpendicular to the rotation axis of the second rotating member. The rotating assembly of the folding device further includes a first transmission member and a second transmission member. The first transmission member includes a first plate and a first sleeve and a first sliding pin respectively connected to both sides of the first plate; the first sleeve is sleeved on the first extended rod portion, and the first sliding pin is slidably engaged with the first groove, so that the first transmission member can transmit the rotation of the first rotating member relative to the base and the rotation of the first rotating shaft relative to the base. The second transmission member includes a second plate and a second sleeve and a second sliding pin respectively connected to both sides of the second plate; the second sleeve is sleeved on the second extended rod portion, and the second sliding pin is slidably engaged with the second groove, so that the second transmission member can transmit the rotation of the second rotating member relative to the base and the rotation of the second rotating shaft relative to the base.

[0021] In this embodiment, the first transmission member / second transmission member can transmit the rotation of the first rotating member / second rotating member relative to the base and the rotation of the first rotating shaft member / second rotating shaft member relative to the base.

[0022] In one embodiment, the rotating assembly of the folding device further includes a first sleeve plate, a second sleeve plate, a first elastic element, and a second elastic element. The first sleeve plate is rotatably fitted onto the first and second extended rod portions; the end faces of the first sleeve plate and the base are spaced apart to define an accommodating space for accommodating a synchronous transmission member. The second sleeve plate is fitted onto the first and second extended rod portions and is located on the side of the first and second sleeves away from the accommodating space. The first elastic element is fitted outside the first extended rod portion, with one end abutting against the outer end of the first extended rod portion and the other end elastically pressing the second sleeve plate against the first sleeve, so that the rotation of the first transmission member and the first rotating shaft relative to the base is damped by the compressive force between the second sleeve plate and the first sleeve. The second elastic element is fitted outside the second extended rod portion, with one end abutting against the outer end of the second extended rod portion and the other end elastically pressing the second sleeve plate against the second sleeve, so that the rotation of the second transmission member and the second rotating shaft relative to the base is damped by the compressive force between the second sleeve plate and the second sleeve.

[0023] In this embodiment, the first sleeve plate, the second sleeve plate, the first elastic element, and the second elastic element can apply damping to the rotation of the first rotating shaft / second rotating shaft.

[0024] In one embodiment, the first sleeve has a plurality of circumferentially distributed protrusions corresponding to the second sleeve plate, with adjacent protrusions defining recesses; the second sleeve plate has a plurality of circumferentially distributed protrusions corresponding to the first sleeve, with adjacent protrusions defining recesses; the protrusions on the first sleeve match the recesses on the second sleeve plate, and the recesses on the first sleeve match the protrusions on the second sleeve plate.

[0025] In this embodiment, the first rotating shaft / second rotating shaft has several stable positions through the cooperation of the protrusion and the concave position, while other intermediate positions will automatically transition to the stable position under the action of elasticity.

[0026] In one embodiment, the rotating assembly of the folding device further includes a third sleeve plate, a first stop, and a second stop. The third sleeve plate is sleeved on the first and second extension rod portions. The first stop is connected to the outer end of the first rotating shaft, and a first elastic member presses the third sleeve plate against the first stop. The second stop is connected to the outer end of the second rotating shaft, and a second elastic member presses the third sleeve plate against the second stop.

[0027] In this embodiment, the third plate, the first stop, and the second stop facilitate the balanced application of force to the first elastic member / second elastic member.

[0028] In one embodiment, a third sleeve is slidably fitted onto the first and second protruding rod portions. A first stop is a nut, threadedly connected to the first protruding rod portion to adjust the stop position. A second stop is a nut, threadedly connected to the second protruding rod portion to adjust the stop position.

[0029] In this embodiment, an adjustable first stop and a second stop are used, which can adjust the amount of damping applied to the rotation of the first rotating shaft / second rotating shaft.

[0030] In one embodiment, the base has a first arc-shaped groove and a second arc-shaped groove. The first rotating member includes a first arc-shaped block and a first connecting plate fixedly connected to the first arc-shaped block; the first arc-shaped block is rotatably fitted into the first arc-shaped groove; the first connecting plate is used to connect the first body of the folding device. The second rotating member includes a second arc-shaped block and a second connecting plate fixedly connected to the second arc-shaped block; the second arc-shaped block is rotatably fitted into the second arc-shaped groove; the second connecting plate is used to connect the second body of the folding device.

[0031] This embodiment facilitates the rotation of the first rotating member / second rotating member relative to the base, and the transmission of rotation to the first transmission member and the second transmission member.

[0032] Secondly, embodiments of this application provide a rotating assembly for a folding device, including a base, a first rotating member, a second rotating member, and a connecting rod structure. The first rotating member and the second rotating member are disposed opposite to each other and rotatably connected to the base. The connecting rod structure includes a connecting rod, a first rotating arm, and a second rotating arm. The lengths of the first rotating arm and the second rotating arm are equal. The connecting rod has a first end and a second end opposite to each other. One end of the first rotating arm is rotatably connected to a first rotation center of the base, and the other end is rotatably connected to the first end of the connecting rod. One end of the second rotating arm is rotatably connected to a second rotation center of the base, and the other end is rotatably connected to the second end of the connecting rod. The first rotating member is driven to the first rotating arm, and the second rotating member is driven to the second rotating arm, so that the rotation of the first rotating member relative to the base can drive the first rotating arm to rotate relative to the first rotation center, thereby driving the second rotating arm to rotate in the opposite direction to the first rotating arm, and thus driving the second rotating member to rotate relative to the base in the opposite direction to the rotation direction of the first rotating member.

[0033] In this embodiment, the rotating assembly of the folding device is used such that the first rotating member and the second rotating member are respectively connected to the two bodies of the folding device. When either body rotates, the rotation can be transmitted to the other body through the rotating assembly, causing the other body to rotate synchronously in the opposite direction, thereby realizing the change from the unfolded state to the folded state of the two bodies. For example, when the body connected to the first rotating member rotates, the rotation will cause the first rotating member to rotate, which in turn causes the first rotating arm to rotate relative to the first rotation center of the base. Since the first and second rotating arms are of equal length, and with the connection of the connecting rod, the rotation of the first rotating arm can drive the second rotating arm to rotate around the second rotation center in the opposite direction to the rotation direction of the first rotating arm through the connecting rod. This, in turn, drives the body connected to the second transmission member to rotate synchronously in the opposite direction to the rotation direction of the first rotating member, realizing the synchronous folding of the two bodies towards each other or unfolding in opposite directions. This connecting rod structure does not have the limitations of a gear structure, which is beneficial for the thin design of the folding device. Moreover, the connecting rod structure has only three components, which is one less component and corresponding assembly requirements compared to the general scheme of achieving synchronization with four gears.

[0034] In one embodiment, the first rotating arm and the first end of the connecting rod are rotatably connected by a first pin; the first rotating arm has a first shaft hole, and the first shaft hole and the first pin are in a tight fit; and / or, the first end of the connecting rod has a second shaft hole, and the second shaft hole and the first pin are in a tight fit; and / or, the second rotating arm and the second end of the connecting rod are rotatably connected by a second pin; the second rotating arm has a third shaft hole, and the third shaft hole and the second pin are in a tight fit; and / or, the second end of the connecting rod has a fourth shaft hole, and the fourth shaft hole and the second pin are in a tight fit.

[0035] In this embodiment, the tight fit between the shaft and the hole can provide damping for the rotation of the connecting rod structure.

[0036] In one embodiment, the first rotating arm has a first groove that connects to a first shaft hole, and a first pin is elastically pressed between the portions of the first rotating arm located on both sides of the first groove; and / or, the second rotating arm has a second groove that connects to a second shaft hole, and a second pin is elastically pressed between the portions of the second rotating arm located on both sides of the second groove.

[0037] In this embodiment, the aforementioned tight fit between the shaft and hole can be easily achieved through the first groove / second groove.

[0038] In one embodiment, the first rotating arm is made of an elastic-plastic material; the cross-section of the first shaft hole is smaller than that of the first pin in its natural state; when the first pin is engaged with the first shaft hole, the portion of the first rotating arm located on both sides of the first groove is elastically opened to enlarge the first shaft hole to fit the first pin; and / or, the second rotating arm is made of an elastic-plastic material; the cross-section of the second shaft hole is smaller than that of the second pin in its natural state; when the second pin is engaged with the second shaft hole, the portion of the second rotating arm located on both sides of the second groove is elastically opened to enlarge the second shaft hole to fit the second pin.

[0039] This implementation method facilitates the realization of the aforementioned tight fit between the shaft and hole.

[0040] In one embodiment, the folding device rotating assembly further includes a first rotating shaft and a second rotating shaft. The central axis of the first rotating shaft passes through a first rotation center, the first rotating shaft is rotatably connected to a base, and has a first protruding rod extending out of the base. A first rotating arm is fixedly sleeved on the first protruding rod. The first rotating member has a first sliding groove extending in a direction perpendicular to the rotation axis of the first rotating member. The central axis of the second rotating shaft passes through a second rotation center, the second rotating shaft is rotatably connected to a base, and has a second protruding rod extending out of the base. A second rotating arm is fixedly sleeved on the second protruding rod. The second rotating member has a second sliding groove extending in a direction perpendicular to the rotation axis of the second rotating member. The folding device rotating assembly further includes a first transmission member and a second transmission member. The first transmission member includes a first plate and a first sleeve and a first sliding pin respectively connected to both sides of the first plate. The first sleeve is sleeved on the first protruding rod, and the first sliding pin is slidably engaged with the first sliding groove, so that the first transmission member can transmit the rotation of the first rotating member relative to the base and the rotation of the first rotating shaft relative to the base. The second transmission component includes a second plate and a second sleeve and a second sliding pin respectively connected to both sides of the second plate; the second sleeve is sleeved on the second extended rod portion, and the second sliding pin is slidably engaged with the second sliding groove, so that the second transmission component can transmit the rotation of the second rotating component relative to the base and the rotation of the second rotating shaft component relative to the base.

[0041] In this embodiment, a first rotating shaft / second rotating shaft is provided to facilitate the installation of a synchronous transmission component or other structure on it, so as to achieve rotational engagement with the base. The first transmission component / second transmission component can transmit the rotation of the first rotating component / second rotating component relative to the base and the rotation of the first rotating shaft / second rotating shaft component relative to the base.

[0042] In one embodiment, the rotating assembly of the folding device further includes a first sleeve plate, a second sleeve plate, a first elastic member, and a second elastic member. The first sleeve plate is rotatably fitted onto the first and second extended rod portions; the end faces of the first sleeve plate and the base are spaced apart to define an accommodating space for accommodating the connecting rod structure. The second sleeve plate is fitted onto the first and second extended rod portions and is located on the side of the first and second sleeves away from the accommodating space. The first elastic member is fitted outside the first extended rod portion, with one end abutting against the outer end of the first extended rod portion and the other end elastically pressing the second sleeve plate against the first sleeve, so that the rotation of the first transmission member and the first rotating shaft relative to the base is damped by the compressive force between the second sleeve plate and the first sleeve. The second elastic member is fitted outside the second extended rod portion, with one end abutting against the outer end of the second extended rod portion and the other end elastically pressing the second sleeve plate against the second sleeve, so that the rotation of the second transmission member and the second rotating shaft relative to the base is damped by the compressive force between the second sleeve plate and the second sleeve.

[0043] In this embodiment, the first sleeve plate, the second sleeve plate, the first elastic element, and the second elastic element can apply damping to the rotation of the first rotating shaft / second rotating shaft.

[0044] In one embodiment, the first sleeve has a plurality of circumferentially distributed protrusions corresponding to the second sleeve plate, with adjacent protrusions defining recesses; the second sleeve plate has a plurality of circumferentially distributed protrusions corresponding to the first sleeve, with adjacent protrusions defining recesses; the protrusions on the first sleeve match the recesses on the second sleeve plate, and the recesses on the first sleeve match the protrusions on the second sleeve plate. The second sleeve has a plurality of circumferentially distributed protrusions corresponding to the second sleeve plate, with adjacent protrusions defining recesses; the second sleeve plate has a plurality of circumferentially distributed protrusions corresponding to the second sleeve, with adjacent protrusions defining recesses; the protrusions on the second sleeve match the recesses on the second sleeve plate, and the recesses on the second sleeve match the protrusions on the second sleeve plate. The folding device rotating assembly also includes a third sleeve plate, a first stop member, and a second stop member. The third sleeve plate is sleeved on the first and second extension rod portions. The first stop member is connected to the outer end of the first rotating shaft member, and a first elastic member presses the third sleeve plate against the first stop member. The second stop is connected to the outer end of the second rotating shaft, and the second elastic member presses the third sleeve against the second stop. The third sleeve is slidably fitted onto the first and second protruding rods. The first stop is a nut, threadedly connected to the first protruding rod to adjust the stop position. The second stop is a nut, threadedly connected to the second protruding rod to adjust the stop position.

[0045] In this embodiment, the cooperation of the protrusion and the concave position enables the first rotating shaft / second rotating shaft to have several stable positions, while other intermediate positions will automatically transition to stable positions under the action of elastic force. The third sleeve plate, the first stop and the second stop facilitate the balanced application of force to the first elastic member / second elastic member.

[0046] In one embodiment, the base has a first arc-shaped groove and a second arc-shaped groove. The first rotating member includes a first arc-shaped block and a first connecting plate fixedly connected to the first arc-shaped block; the first arc-shaped block is rotatably fitted into the first arc-shaped groove; the first connecting plate is used to connect the first body of the folding device. The second rotating member includes a second arc-shaped block and a second connecting plate fixedly connected to the second arc-shaped block; the second arc-shaped block is rotatably fitted into the second arc-shaped groove; the second connecting plate is used to connect the second body of the folding device.

[0047] This embodiment facilitates the rotation of the first rotating member / second rotating member relative to the base, and the transmission of rotation to the first transmission member and the second transmission member.

[0048] Thirdly, embodiments of this application provide a folding device, including a first body, a second body, and the aforementioned folding device rotating assembly. The first body is connected to a first rotating member, and the second body is connected to a second rotating member.

[0049] The folding device in this embodiment uses the aforementioned folding device rotating component, which can realize synchronous reverse transmission of the two bodies and can be designed to have a small thickness. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the structure of the folding device in the embodiments of this application;

[0052] Figure 2 This is a three-dimensional view of a first embodiment of the folding device rotating assembly in this application.

[0053] Figure 3 for Figure 2 A three-dimensional exploded view of the rotating assembly of the folding device;

[0054] Figure 4 for Figure 2 A cross-sectional view of the rotating assembly of the folding device along line AA;

[0055] Figure 5 for Figure 4 Structural view of the synchronous transmission component in the diagram;

[0056] Figure 6This is a three-dimensional view of a second embodiment of the folding device rotating assembly in this application.

[0057] Figure 7 for Figure 6 A three-dimensional exploded view of the rotating assembly of the folding device;

[0058] Figure 8 for Figure 6 A cross-sectional view of the rotating assembly of the folding device along line BB;

[0059] Figure 9 for Figure 8 Structural view of the linkage structure in the image;

[0060] Figure 10 This is a schematic diagram of another embodiment of the linkage structure;

[0061] Figure 11 for Figure 10 A schematic diagram of another embodiment of the linkage structure;

[0062] Figure 12 for Figure 10 A schematic diagram of another embodiment of the linkage structure;

[0063] Figure 13 This is a three-dimensional view of a third embodiment of the folding device rotating assembly in this application, which adopts... Figure 10 The linkage structure.

[0064] Key component symbols: 200 - Folding device; 210 - First body; 220 - Second body; 100 - Folding device rotating assembly; 1 - Base; O1 - First rotation center; O2 - Second rotation center; L1 - Connecting line; C11 - First arc groove; C12 - Second arc groove; 2a - First rotating component; 2b - Second rotating component; 21a - First connecting plate; 21b - First protruding plate; 21c - First arc block; C21 - First slide groove; C22-Second slide groove; 22a-Second connecting plate; 22b-Second protruding plate; 22c-Second arc block; 3-Synchronous transmission component; 31-First connecting part; 32-Second connecting part; 33-Transmission part; 33a-First connecting arc segment; 33b-Second connecting arc segment; 33c-Intermediate plate segment; S1-First connecting arc strip; S2-Second connecting arc strip; S3-Third connecting arc strip; S4-Fourth connecting arc strip; 4a-First 4b-Second rotating shaft; 41a-First extended rod; 41b-Second extended rod; 5a-First transmission component; 5b-Second transmission component; 51a-First plate; 52a-First sleeve; 53a-First sliding pin; 51b-Second plate; 52b-Second sleeve; 53b-Second sliding pin; 61-First sleeve plate; 62-Second sleeve plate; 63-Third sleeve plate; M1-Protrusion; M2-Recess; F1-First elastic element; F 2-Second elastic element; Q1-Accommodation space; 7a-First stop; 7b-Second stop; 8a, 8b-Connecting rod structure; 81-First rotating arm; 82-Second rotating arm; 83-Connecting rod; 84-First pin; 85-Second pin; D1-First end; D2-Second end; K1-First shaft hole; K2-Second shaft hole; K3-Third shaft hole; K4-Fourth shaft hole; C31-First groove; C32-Second groove; K5-Non-circular hole. Detailed Implementation

[0065] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0066] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0068] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0069] Example

[0070] This embodiment provides a foldable device, which can be a foldable mobile phone, laptop, or tablet.

[0071] See Figure 1 In this embodiment, the folding device 200 includes a first body 210, a second body 220, and a folding device rotation assembly 100. For example, when the folding device 200 is a mobile phone, the first body 210 and the second body 220 can be two shell parts of the mobile phone. The folding device rotation assembly 100 is connected between the first body 210 and the second body 220 to realize the relative rotation of the first body 210 and the second body 220, so as to realize the unfolding or folding of the first body 210 and the second body 220. The number of folding device rotation assemblies 100 can be one or two (e.g., ...). Figure 1 (or more).

[0072] To achieve synchronous rotation of the first body 210 and the second body 220, known technologies often employ gears. However, for folding devices requiring minimal thickness, the diameter of the gears must be correspondingly reduced. But gears, limited by tooth width and thickness strength constraints, cannot be made sufficiently small.

[0073] The folding device rotating assembly 100 provided in this embodiment is used to realize the synchronous rotation of the first body 210 and the second body 220. The structure does not use gears, which is beneficial for the folding device 200 to be set thin enough.

[0074] Figures 2-5 One embodiment of the folding device rotating assembly 100 of this embodiment is shown.

[0075] See Figure 2 and Figure 3 The rotating assembly 100 of the folding device includes a base 1, a first rotating member 2a and a second rotating member 2b, and a synchronous transmission member 3. The first rotating member 2a and the second rotating member 2b are arranged opposite to each other and are rotatably connected to both sides of the base 1.

[0076] like Figure 1The first body 210 is connected to the first rotating member 2a, and the second body 220 is connected to the second rotating member 2b, so as to realize the unfolding or folding of the first body 210 and the second body 220.

[0077] See also Figure 4 and Figure 5 The synchronous transmission component 3 includes an integrally formed transmission part 33, a first connecting part 31, and a second connecting part 32. The first connecting part 31 is rotatably fitted to the first rotation center O1 of the base 1, and the second connecting part 32 is rotatably fitted to the second rotation center O2 of the base 1. The first connecting part 31 and the second connecting part 32 are centrally symmetrical about the midpoint of the line connecting the first rotation center O1 and the second rotation center O2, and are respectively connected to the two ends of the transmission part 33. The portions of the transmission part 33 connecting to the first connecting part 31 and the portions of the transmission part 33 connecting to the second connecting part 32 are elastic structures. Elastic deformation can occur between the first connecting part 31 and the transmission part 33, and between the second connecting part 32 and the transmission part 33, so that the rotation of the first connecting part 31 around the first rotation center O1 can drive the second connecting part 32 to rotate synchronously in the opposite direction around the second rotation center O2 through the transmission part 33. The first rotating member 2a is driven to the first connecting part 31, and the second rotating member 2b is driven to the second connecting part 32, so that the rotation of the first rotating member 2a relative to the base 1 can drive the first connecting part 31 to rotate relative to the first rotation center O1, thereby driving the second connecting part 32 to rotate in the opposite direction to the first connecting part 31, and thereby driving the second rotating member 2b to rotate relative to the base 1 in the opposite direction to the rotation direction of the first rotating member 2a.

[0078] In this embodiment, when the folding device rotating assembly 100 is in use, the first body 210 and the second body 220 are respectively connected to the first rotating member 2a and the second rotating member 2b. When either body rotates, the rotation can be transmitted to the other body through the folding device rotating assembly 100, causing the other body to rotate synchronously in the opposite direction, thereby realizing the change of the two bodies from the unfolded state to the folded state. For example, when the body connected to the first rotating member 2a rotates, the rotation will cause the first rotating member 2a to rotate, and then cause the first connecting part 31 to rotate relative to the first rotation center O1 of the base 1. Since the first connecting part 31 and the second connecting part 32 are centrally symmetrical, and with the connection of the transmission part 33, the rotation of the first connecting part 31 can drive the second connecting part 32 to rotate around the second rotation center O2 in the opposite direction to the rotation direction of the first connecting part 31 through the transmission part 33. Then, through the second transmission member 5b, the body connected to the second transmission member 5b will rotate synchronously in the opposite direction to the rotation direction of the first rotating member 2a, realizing the synchronous folding of the two bodies towards each other or unfolding in opposite directions.

[0079] In this embodiment, a single synchronous transmission component 3 is used to achieve synchronous transmission between the first rotating component 2a and the second rotating component 2b. This eliminates the limitations of a gear structure, facilitating a slimmer design for the folding device 200. Furthermore, the single synchronous transmission component 3 reduces the number of parts, lowers processing difficulty and cost, reduces assembly steps, and provides higher transmission accuracy. In some other embodiments, the folding device rotating assembly 100 can also be used in other devices or structures, such as sliding doors.

[0080] See Figure 5 In this embodiment, the transmission part 33 includes an intermediate plate segment 33c, a first connecting arc segment 33a, and a second connecting arc segment 33b. The first connecting arc segment 33a connects the intermediate plate segment 33c and the first connecting part 31, and the second connecting arc segment 33b connects the intermediate plate segment 33c and the second connecting part 32. The intermediate plate segment 33c has a shape in which the width gradually decreases from the middle to both ends, such as a rhombus or a parallelogram. The first connecting arc segment 33a includes a first connecting arc strip S1 and a second connecting arc strip S2. The first connecting arc strip S1 is arc-shaped, and one end of the first connecting arc strip S1 that connects to the intermediate plate segment 33c is tangent to the extension direction of the intermediate plate segment 33c. The other end of the first connecting arc strip S1 is connected to the first connecting part 31. The second connecting arc S2 is located on the side of the first connecting arc S1 near the middle plate segment 33c, and one end of the second connecting arc S2 is connected to the connection point of the first connecting arc S1 and the middle plate segment 33c, and the other end is connected to the first connecting part 31; the connection point of the second connecting arc S2 and the first connecting part 31 is located inside the connection point of the first connecting arc S1 and the first connecting part 31. Similarly, the second connecting arc segment 33b includes a third connecting arc strip S3 and a fourth connecting arc strip S4. The third connecting arc strip S3 is arc-shaped. One end of the third connecting arc strip S3 is tangent to the extension direction of the intermediate plate segment 33c, and the other end of the third connecting arc strip S3 is connected to the second connecting part 32. The fourth connecting arc strip S4 is located on the side of the third connecting arc strip S3 near the intermediate plate segment 33c. One end of the fourth connecting arc strip S4 is connected to the connection point between the third connecting arc strip S3 and the intermediate plate segment 33c, and the other end is connected to the second connecting part 32. The connection point between the fourth connecting arc strip S4 and the second connecting part 32 is located inside the connection point between the third connecting arc strip S3 and the second connecting part 32.

[0081] The first connecting arc strip S1 and the second connecting arc strip S2 are connected to form a near-V-shaped structure. The intermediate plate segment 33c is connected to the first connecting part 31 through the V-shaped first connecting arc strip S1 and the second connecting arc strip S2, so that the intermediate plate segment 33c can achieve a certain angle of relative rotation with respect to the first connecting part 31 through the elastic deformation of the first connecting arc strip S1 and the second connecting arc strip S2. The third connecting arc strip S3 and the fourth connecting arc strip S4 are connected to form a near-V-shaped structure. The intermediate plate segment 33c is connected to the second connecting part 32 through the V-shaped third connecting arc strip S3 and the fourth connecting arc strip S4, so that the intermediate plate segment 33c can achieve a certain angle of relative rotation with respect to the second connecting part 32 through the elastic deformation of the third connecting arc strip S3 and the fourth connecting arc strip S4. The combination of the two allows the transmission part 33 to transmit the rotation of the first connecting part 31 and the rotation of the second connecting part 32. In addition, the synchronous transmission member 3 is centrally symmetrically arranged, so that the rotation of the first connecting part 31 and the rotation of the second connecting part 32 are kept synchronous and opposite. Furthermore, a near-V-shaped structure is formed by connecting the first connecting arc strip S1 and the second connecting arc strip S2. The second connecting arc strip S2 is located inside the first connecting arc strip S1, which can support the first connecting arc strip S1 and reduce the degree of deformation of the first connecting arc strip S1 under pressure towards the first rotation center, so that the structure maintains a certain shape and ensures accurate transmission of the synchronous transmission component 3. Similarly, a near-V-shaped structure is formed by connecting the third connecting arc strip S3 and the fourth connecting arc strip S4. The fourth connecting arc strip S4 is located inside the third connecting arc strip S3, which can support the third connecting arc strip S3 and reduce the degree of deformation of the third connecting arc strip S3 under pressure towards the second rotation center, so that the structure maintains a certain shape and ensures accurate transmission of the synchronous transmission component 3.

[0082] In this embodiment, optionally, the first connecting arc S1, the second connecting arc S2, the third connecting arc S3, and the fourth connecting arc S4 are all arc-shaped, with the bending center located near the middle plate segment 33c. The width of the first connecting arc S1, the second connecting arc S2, the third connecting arc S3, and the fourth connecting arc S4 is 1.0-3.0 mm, such as 2.0 mm. The bending center being located near the middle plate segment 33c allows for a smooth transition between each connecting arc segment, reducing stress concentration during elastic deformation transmission of the synchronous transmission component 3. The appropriate width of each connecting arc segment ensures that the synchronous transmission component 3 maintains a certain structural strength while undergoing elastic deformation under stress.

[0083] The synchronous transmission component 3 in this embodiment can be formed by cutting sheet metal, for example, by wire cutting a spring steel plate with a thickness of 1.0-3.0 mm. It can also be made by powder metallurgy technology or by 3D printing.

[0084] The synchronous transmission component 3 in this embodiment can be made of metal materials (such as spring steel) or non-metals with a certain elastic deformation capability (such as some plastics).

[0085] See you again Figures 2-4 The folding device rotating assembly 100 in this embodiment also includes a first rotating shaft 4a and a second rotating shaft 4b.

[0086] The central axis of the first rotating shaft 4a passes through the first rotation center O1. The first rotating shaft 4a is rotatably connected to the base 1 and has a first protruding rod portion 41a extending out of the base 1. For example, one end of the first rotating shaft 4a is set as a cylindrical segment (not shown in the figure), which is rotatably fitted into a mating hole (not shown in the figure) on the base 1.

[0087] The central axis of the second rotating shaft 4b passes through the second rotation center O2. The second rotating shaft 4b is rotatably connected to the base 1 and has a second protruding rod portion 41b extending out of the base 1. For example, one end of the second rotating shaft 4b is configured as a cylindrical segment (not shown in the figure), which is rotatably fitted into a mating hole (not shown in the figure) on the base 1.

[0088] The first connecting part 31 is fixedly sleeved on the first protruding rod part 41a. The second connecting part 32 is fixedly sleeved on the second protruding rod part 41b. The first protruding rod part 41a and the second protruding part can have non-circular cross sections (such as oblong cross sections). Correspondingly, non-circular holes K5 (such as holes with oblong cross sections) are provided on the first connecting part 31 and the second connecting part 32. In this way, when the first rotating shaft 4a / second rotating shaft 4b rotates relative to the base 1, it can drive the first connecting part 31 / second connecting part 32 to rotate synchronously.

[0089] See also Figures 2-4 In this embodiment, the first rotating member 2a is provided with a first groove C21 extending in a direction perpendicular to the rotation axis of the first rotating member 2a.

[0090] Optionally, the first rotating member 2a includes a first connecting plate 21a, a first protruding plate portion 21b protruding from one side of the first connecting plate 21a, and a first arcuate block 21c connected to the first connecting plate 21a. The first protruding plate portion 21b has the aforementioned first groove C21. The first arcuate block 21c is a column with a generally arcuate cross-section. The second rotating member 2b has a second groove C22 extending in a direction perpendicular to the rotation axis of the second rotating member 2b. Optionally, the second rotating member 2b includes a second connecting plate 22a, a second protruding plate portion 22b protruding from one side of the second connecting plate 22a, and a second arcuate block 22c connected to the second connecting plate 22a. The second protruding plate portion 22b has the aforementioned second groove C22. The second arcuate block 22c is a column with a generally arcuate cross-section.

[0091] Correspondingly, the base 1 is provided with a first arc-shaped groove C11 and a second arc-shaped groove C12. The aforementioned first arc-shaped block 21c is rotatably fitted into the first arc-shaped groove C11, and the aforementioned second arc-shaped block 22c is rotatably fitted into the second arc-shaped groove C12, so as to realize the rotational engagement between the first rotating member 2a and the second rotating member 2b and the base 1, respectively.

[0092] In this embodiment, the rotation axis of the first rotating member 2a relative to the base 1 and the rotation axis of the first rotating shaft member 4a relative to the base 1 do not coincide. The folding device rotating assembly 100 also includes a first transmission member 5a, which is used to realize the motion transmission between the rotation of the first rotating member 2a relative to the base 1 and the rotation of the first rotating shaft member 4a relative to the base 1. The rotation axis of the second rotating member 2b relative to the base 1 and the rotation axis of the second rotating shaft member 4b relative to the base 1 do not coincide. The folding device rotating assembly 100 also includes a second transmission member 5b, which is used to realize the motion transmission between the rotation of the second rotating member 2b relative to the base 1 and the rotation of the second rotating shaft member 4b relative to the base 1.

[0093] Optionally, the first transmission member 5a includes a first plate 51a and a first sleeve 52a and a first sliding pin 53a respectively connected to both sides of the first plate 51a. The first sleeve 52a is sleeved on the first protruding rod portion 41a. Torque transmission is achieved by aligning the first protruding rod portion 41a and the first sleeve 52a with a non-circular cross-section (e.g., oblong) shaft hole. The first sliding pin 53a is slidably fitted into the first sliding groove C21. Thus, the first transmission member 5a can transmit the rotation of the first rotating member 2a relative to the base 1 and the rotation of the first rotating shaft member 4a relative to the base 1. For example, when the first rotating member 2a rotates relative to the base 1, the movement of its first sliding groove C21 will drive the first sleeve 52a and the first protruding rod portion 41a sleeved on it to rotate relative to the base 1 through the first sliding pin 53a. During this process, the first sliding pin 53a can simultaneously slide along the extension direction of the first sliding groove C21 to accommodate the rotation of two different axes.

[0094] The second transmission component 5b includes a second plate 51b and a second sleeve 52b and a second sliding pin 53b respectively connected to both sides of the second plate 51b. The second sleeve 52b is sleeved on the second protruding rod portion 41b. Torque transmission is achieved by aligning the second protruding rod portion 41b and the second sleeve 52b with a non-circular cross-section (e.g., oblong) shaft hole. The second sliding pin 53b is slidably fitted into the second sliding groove C22. Thus, the second transmission component 5b can transmit the rotation of the second rotating component 2b relative to the base 1 and the rotation of the second rotating shaft component 4b relative to the base 1. For example, when the second rotating component 2b rotates relative to the base 1, the movement of its second sliding groove C22 will drive the second sleeve 52b and the second protruding rod portion 41b it sleeves to rotate relative to the base 1 via the second sliding pin 53b. During this process, the second sliding pin 53b can simultaneously slide along the extension direction of the second sliding groove C22 to accommodate the rotation of two different shafts.

[0095] See also Figures 2-3 In this embodiment, the folding device rotating assembly 100 further includes a first sleeve plate 61, a second sleeve plate 62, a first elastic element F1, and a second elastic element F2. The first sleeve plate 61 is rotatably sleeved on the first protruding rod portion 41a and the second protruding rod portion 41b; the end faces of the first sleeve plate 61 and the base 1 are spaced apart to define an accommodating space Q1 for accommodating the synchronous transmission member 3. In this embodiment, the synchronous transmission member 3 does not adopt a gear form, and its thickness can be set to be relatively small, thereby allowing the thickness dimension of the accommodating space Q1 between the end faces of the first sleeve plate 61 and the base 1 to be correspondingly smaller, reducing its space occupation and facilitating structural miniaturization. The second sleeve plate 62 is sleeved on the first protruding rod portion 41a and the second protruding rod portion 41b, and is located on the side of the first sleeve 52a and the second sleeve 52b away from the accommodating space Q1. The first elastic element F1 is sleeved outside the first protruding rod portion 41a, with one end abutting against the outer end of the first protruding rod portion 41a and the other end elastically pressing the second sleeve plate 62 against the first sleeve 52a. This dampens the rotation of the first transmission member 5a and the first rotating shaft member 4a relative to the base 1 due to the compressive force between the second sleeve plate 62 and the first sleeve 52a. The second elastic element F2 is sleeved outside the second protruding rod portion 41b, with one end abutting against the outer end of the second protruding rod portion 41b and the other end elastically pressing the second sleeve plate 62 against the second sleeve 52b. This dampens the rotation of the second transmission member 5b and the second rotating shaft member 4b relative to the base 1 due to the compressive force between the second sleeve plate 62 and the second sleeve 52b. Thus, the rotation of the first rotating shaft member 4a / second rotating shaft member 4b driven by the first sleeve 52a / second sleeve 52b is damped by friction due to the elastic compression of the first sleeve plate 61.

[0096] Optionally, the first sleeve 52a has a plurality of circumferentially distributed protrusions M1 corresponding to the second sleeve plate 62, with a recess M2 defined between adjacent protrusions M1; the second sleeve plate 62 has a plurality of circumferentially distributed protrusions M1 corresponding to the first sleeve 52a, with a recess M2 defined between adjacent protrusions M1; the protrusions M1 on the first sleeve 52a match the recesses M2 on the second sleeve plate 62, and the recesses M2 on the first sleeve 52a match the protrusions M1 on the second sleeve plate 62. Similarly, the second sleeve 52b has a plurality of circumferentially distributed protrusions M1 corresponding to the second sleeve plate 62, with a recess M2 defined between adjacent protrusions M1; the second sleeve plate 62 has a plurality of circumferentially distributed protrusions M1 corresponding to the second sleeve 52b, with a recess M2 defined between adjacent protrusions M1; the protrusions M1 on the second sleeve 52b match the recesses M2 on the second sleeve plate 62, and the recesses M2 on the second sleeve 52b match the protrusions M1 on the second sleeve plate 62. Thus, at different correspondences between the convex part M1 and the concave part M2, the rotation angles of the first rotating shaft 4a and the second rotating shaft 4b are relatively stable. At other angles, the elastic force of the first elastic element F1 / second elastic element F2 will cause the first rotating shaft 4a / second rotating shaft 4b to continue rotating to the nearest stable position. Of course, switching between adjacent stable positions requires the user to apply external force to overcome the elastic force of the first elastic element F1 / second elastic element F2, forcing the first sleeve 52a / second sleeve 52b to rotate relative to the first sleeve plate 61, thereby changing the correspondence between the convex part M1 and the concave part M2. In this embodiment, three stable positions can be set. In the first stable position, the first rotating member 2a and the second rotating member 2b are in an unfolded state, so that the two bodies of the folding device 200 are unfolded. In the second stable position, the first rotating member 2a and the second rotating member 2b are in a perpendicular state, so that the two bodies of the folding device 200 are perpendicular to each other. In the third stable position, the first rotating member 2a and the second rotating member 2b are in a folded and overlapping state, so that the two bodies of the folding device 200 are folded and overlapped. In this way, the user can only switch the folding device 200 between the unfolded state, the perpendicular state, and the folded state when a certain force is applied, while other intermediate states are unstable states and will automatically transition to one of the three stable states.

[0097] In this embodiment, the folding device rotating assembly 100 further includes a third sleeve plate 63, a first stop 7a, and a second stop 7b. The third sleeve plate 63 is sleeved on the first extending rod portion 41a and the second extending rod portion 41b. The first stop 7a is connected to the outer end of the first rotating shaft portion 4a, and the first elastic member F1 presses the third sleeve plate 63 against the first stop 7a. The second stop 7b is connected to the outer end of the second rotating shaft portion 4b, and the second elastic member F2 presses the third sleeve plate 63 against the second stop 7b. Optionally, the third sleeve plate 63 is slidably sleeved on the first extending rod portion 41a and the second extending rod portion 41b; the first stop 7a is a nut and is threadedly connected to the first extending rod portion 41a to adjust the stop position; the second stop 7b is a nut and is threadedly connected to the second extending rod portion 41b to adjust the stop position. By adjusting the positions of the first stop 7a and the second stop 7b, the elastic force of the first elastic element F1 and the second elastic element F2 can be adjusted, thereby adjusting the damping magnitude of the rotation of the folding device rotating assembly 100.

[0098] Figures 6-9 Another embodiment of the folding device rotating assembly 100 of this embodiment is shown. This embodiment is similar to the one described above. Figures 2-5 The difference in the folding device rotating assembly 100 of the illustrated embodiment is that the structure for achieving synchronous and opposite rotation of the first rotating member 2a and the second rotating member 2b adopts a linkage structure 8a instead of the aforementioned synchronous transmission member 3.

[0099] See also Figure 7 and Figure 9 The linkage structure 8a in the folding device rotating assembly 100 of this embodiment includes a linkage 83, a first rotating arm 81 and a second rotating arm 82. The length of the first rotating arm 81 and the length of the second rotating arm 82 are equal. The linkage 83 has a first end D1 and a second end D2 opposite to each other. One end of the first rotating arm 81 is rotatably connected to the first rotation center O1 of the base 1 and the other end is rotatably connected to the first end D1 of the linkage 83. One end of the second rotating arm 82 is rotatably connected to the second rotation center O2 of the base 1 and the other end is rotatably connected to the second end D2 of the linkage 83. The first rotating arm 81 and the second rotating arm 82 are respectively located on both sides of the line L1 connecting the first rotation center O1 and the second rotation center O2.

[0100] The first rotating component 2a is connected to the first rotating arm 81, and the second rotating component 2b is connected to the second rotating arm 82, so that the rotation of the first rotating component 2a relative to the base 1 can drive the first rotating arm 81 to rotate relative to the first rotation center O1, thereby driving the second rotating arm 82 to rotate in the opposite direction to the first rotating arm 81, and thus driving the second rotating component 2b to rotate relative to the base 1 in the opposite direction to the rotation direction of the first rotating component 2a.

[0101] The folding device rotating assembly 100 in this embodiment is used for a folding device 200, such as a folding mobile phone. In use, the two bodies of the folding device 200 are respectively connected to a first rotating member 2a and a second rotating member 2b. When either body rotates, this rotation can be transmitted to the other body through the folding device rotating assembly 100 in this embodiment, causing the other body to rotate synchronously in the opposite direction, thereby realizing the change from an unfolded state to a folded state between the two bodies. For example, when the body connected to the first rotating member 2a rotates, this rotation will cause the first rotating member 2a to rotate, which in turn will cause the first rotating arm 81 to rotate relative to the first rotation center O1 of the base 1. Since the first rotating arm 81 and the second rotating arm 82 are of equal length and are located on both sides of the first rotation center O1 and the second rotation center O2 respectively, and are connected by the connecting rod 83, the rotation of the first rotating arm 81 can drive the second rotating arm 82 to rotate around the second rotation center O2 in the opposite direction to the rotation of the first rotating arm 81 through the connecting rod 83. This, in turn, drives the body connected to the second transmission component 5b to rotate synchronously in the opposite direction to the rotation of the first rotating component 2a, realizing the synchronous folding of the two bodies towards each other or the unfolding of the two bodies in opposite directions. This connecting rod structure 8a does not have the limitations of a gear structure, which is conducive to the thin design of the folding device 200. Moreover, the connecting rod structure 8a has only three components, which is one less component compared to the general scheme of achieving synchronization with four gears. This reduces the processing difficulty and cost, reduces the assembly steps, and improves the transmission accuracy.

[0102] Figures 6-9 The connecting rod structure 8a can be further designed as follows: the first rotating arm 81 and the first end D1 of the connecting rod 83 are rotatably connected by a first pin 84; the first rotating arm 81 has a first shaft hole K1, and the first shaft hole K1 and the first pin 84 are in a tight fit (such as an interference fit); the first end D1 of the connecting rod 83 has a second shaft hole K2, and the second shaft hole K2 and the first pin 84 are in a tight fit (such as an interference fit). The second rotating arm 82 and the second end D2 of the connecting rod 83 are rotatably connected by a second pin 85; the second rotating arm 82 has a third shaft hole K3, and the third shaft hole K3 and the second pin 85 are in a tight fit (such as an interference fit); the second end D2 of the connecting rod 83 has a fourth shaft hole K4, and the fourth shaft hole K4 and the second pin 85 are in a tight fit (such as an interference fit). When the first rotating arm 81 / second rotating arm 82 and connecting rod 83 rotate relative to each other through a tight fit between the shaft holes, they experience frictional damping with the first / second pins. In actual use, each shaft hole and its corresponding pin is fitted with a large interference fit plus grease lubrication to reduce the rate of friction loss while maintaining appropriate damping. Optionally, spiral grooves are formed on the circumferential surface of each shaft hole to accommodate grease.

[0103] Optionally, see Figure 10In one embodiment, the linkage structure 8b, based on the aforementioned linkage structure 8a, further comprises: a first rotating arm 81 having a first groove C31, the first groove C31 communicating with a first shaft hole K1, and a first pin 84 being elastically pressed between the portions of the first rotating arm 81 located on both sides of the first groove C31. A second rotating arm 82 having a second groove C32, the second groove C32 communicating with a second shaft hole K2, and a second pin 85 being elastically pressed between the portions of the second rotating arm 82 located on both sides of the second groove C32. The first rotating arm 81 is made of an elastoplastic material, wherein the elastoplastic material is the opposite of a brittle material, and is a material with elastic deformation capability and a certain degree of ductility, such as spring steel or other metals; the cross-section of the first shaft hole K1 is smaller than that of the first pin 84 in its natural state, and when the first pin 84 is fitted into the first shaft hole K1, the portions of the first rotating arm 81 located on both sides of the first groove C31 are elastically spread to enlarge the first shaft hole K1 to fit the first pin 84. The second rotating arm 82 is made of an elastic-plastic material. In its natural state, the cross-section of the second shaft hole K2 is smaller than that of the second pin 85. When the second pin 85 is fitted into the second shaft hole K2, the portions of the second rotating arm 82 located on both sides of the second groove C32 are elastically expanded to enlarge the second shaft hole K2 to fit the second pin 85. Furthermore, compared to a connecting rod structure without the first groove C31 / second groove C32, the first rotating arm 81 / second rotating arm 82 with the first groove C31 / second groove C32 can elastically expand or shrink when rotating relative to the pin, thereby reducing frictional loss and extending the structural service life while still covering and pressing the first pin 84 / second pin 85.

[0104] In this embodiment, optionally, the first groove C31 / second groove C32 can be located on the width-direction centerline (not shown in the figure) of the first rotating arm 81 / second rotating arm 82, such as... Figure 10 In this context, the wide direction refers to the direction perpendicular to the extension direction of the first rotating arm 81 / second rotating arm 82. At this time, the damping of the first rotating arm 81 / second rotating arm 82 rotating clockwise and counterclockwise is basically equal.

[0105] In other implementations, such as Figure 11 The opening positions of the first groove C31 and the second groove C32 are offset from the width centerline of the first swing arm 81 and the second swing arm 82, and are located on the side of the width centerline away from the center of the connecting rod 83 (i.e. Figure 11 (showing the opposite sides of the first rotating arm 81 / second rotating arm 82), at this time, the damping of the first rotating arm 81 / second rotating arm 82 rotating clockwise is less than the damping of the counterclockwise rotation, thereby making the damping of the folding device 200 folding and closing greater than the damping of unfolding.

[0106] Figure 12In the illustrated embodiment, the opening position of the first groove C31 / second groove C32 is offset from the width centerline of the first rotating arm 81 / second rotating arm 82, and is located on the side of the width centerline closer to the center of the connecting rod 83 (i.e. Figure 12 (shown on opposite sides of the first rotating arm 81 / second rotating arm 82), at this time, the damping of the first rotating arm 81 / second rotating arm 82 rotating clockwise is greater than the damping of the first rotating arm 81 / second rotating arm 82 rotating counterclockwise, thereby making the damping of the folding device 200 folding and closing less than the damping of unfolding.

[0107] Using the above Figures 10-12 The linkage structure 8a with three implementations can produce three different folding devices 200 with different damping conditions for unfolding and folding, which can be selected according to needs to meet different requirements, obtain corresponding feel, and improve user experience.

[0108] When a shaft-hole tight fit (including the opening of a first groove C31 and a second groove C32) is used, which can provide damping for the rotation of the connecting rod structure, the aforementioned Figures 2-5 or Figures 6-9 The first plate 61, the second plate 62, the first elastic element F1 and the second elastic element F2, the third plate 63, the first stop 7a and the second stop 7b, etc., which are mainly used to provide rotational damping, can be retained or omitted. Figure 13 The example shown is used in Figure 10 The connecting rod structure 8b is modified by removing the first sleeve plate 61, the second sleeve plate 62, the first elastic element F1 and the second elastic element F2, the third sleeve plate 63, the first stop 7a and the second stop 7b, and shortening the first rotating shaft 4a and the second rotating shaft 4b so that the first rotating shaft 4a / the second rotating shaft 4b are fixedly connected to the first sleeve 52a / the second sleeve 52b respectively. This folding device rotating assembly 100 has a simpler structure and smaller size.

[0109] Of course, in other implementations, other damping schemes can be adopted, and in some cases where damping is not required, the design of the damping structure can be directly omitted.

[0110] In summary, the folding device rotating component 100 of the folding device 200 in this embodiment adopts a gearless structure to achieve synchronous reverse transmission of the body, which is beneficial to the thin design of the folding device 200.

[0111] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A rotating assembly for a folding device, characterized in that, include: Base; A first rotating shaft and a second rotating shaft; the first rotating shaft is rotatably connected to the base, and the second rotating shaft is rotatably connected to the base; wherein the central axis of the first rotating shaft passes through a first rotation center, and the central axis of the second rotating shaft passes through a second rotation center; the position of the first rotation center is fixed relative to the base, and the position of the second rotation center is fixed relative to the base; A first rotating member and a second rotating member, the first rotating member and the second rotating member being disposed opposite to each other and rotatably connected to the base; and A linkage structure includes a linkage, a first rotating arm, and a second rotating arm. The lengths of the first rotating arm and the second rotating arm are equal. The linkage has a first end and a second end opposite to each other. One end of the first rotating arm is fixed to a first rotating shaft and rotatably connected to a first rotation center of the base, and the other end is rotatably connected to the first end of the linkage. One end of the second rotating arm is fixed to a second rotating shaft and rotatably connected to a second rotation center of the base, and the other end is rotatably connected to the second end of the linkage. The first rotating member is driven to the first rotating arm, and the second rotating member is driven to the second rotating arm, so that the rotation of the first rotating member relative to the base can drive the first rotating arm to rotate relative to the first rotation center, thereby driving the second rotating arm to rotate in the opposite direction to the first rotating arm, and thereby driving the second rotating member to rotate relative to the base in the opposite direction to the rotation direction of the first rotating member. One end of the first rotating shaft is configured as a cylindrical segment, which is rotatably fitted into a mating hole on the base; one end of the second rotating shaft is configured as a cylindrical segment, which is rotatably fitted into a mating hole on the base.

2. The folding device rotating assembly according to claim 1, characterized in that: The first rotating arm and the first end of the connecting rod are rotatably connected by a first pin; the first rotating arm has a first shaft hole, and the first shaft hole and the first pin are in a tight fit; and / or, the first end of the connecting rod has a second shaft hole, and the second shaft hole and the first pin are in a tight fit. And / or, The second rotating arm and the second end of the connecting rod are rotatably connected by a second pin; the second rotating arm has a third shaft hole, and the third shaft hole and the second pin are in a tight fit; and / or, the second end of the connecting rod has a fourth shaft hole, and the fourth shaft hole and the second pin are in a tight fit.

3. The folding device rotating assembly according to claim 2, characterized in that: The first rotating arm has a first groove, which connects to the first shaft hole, and the first pin is elastically pressed between the portions of the first rotating arm located on both sides of the first groove. And / or, The second rotating arm has a second groove, which connects to the second shaft hole, and the second pin is elastically pressed between the portions of the second rotating arm located on both sides of the second groove.

4. The folding device rotating assembly according to claim 3, characterized in that: The first rotating arm is made of an elastic-plastic material; the cross section of the first shaft hole is smaller than that of the first pin in its natural state; when the first pin is fitted into the first shaft hole, the portion of the first rotating arm located on both sides of the first groove is elastically stretched to enlarge the first shaft hole to fit the first pin. And / or, The second rotating arm is made of an elastic-plastic material. In its natural state, the cross-section of the second shaft hole is smaller than that of the second pin. When the second pin is fitted into the second shaft hole, the portions of the second rotating arm located on both sides of the second groove are elastically stretched to enlarge the second shaft hole to fit the second pin.

5. The folding device rotating assembly according to claim 2, characterized in that: The first rotating shaft has a first protruding rod portion extending out of the base, and the first rotating arm is fixedly sleeved on the first protruding rod portion; the first rotating member is provided with a first sliding groove extending in a direction perpendicular to the rotation axis of the first rotating member; The second rotating shaft has a second protruding rod portion extending out of the base; the second rotating arm is fixedly sleeved on the second protruding rod portion; the second rotating member is provided with a second sliding groove extending in a direction perpendicular to the rotation axis of the second rotating member; The rotating assembly of the folding device further includes a first transmission component and a second transmission component. The first transmission component includes a first plate and a first sleeve and a first sliding pin respectively connected to both sides of the first plate; the first sleeve is sleeved on the first extended rod portion, and the first sliding pin is slidably engaged with the first sliding groove, so that the first transmission component can transmit the rotation of the first rotating component relative to the base and the rotation of the first rotating shaft component relative to the base; The second transmission component includes a second plate and a second sleeve and a second sliding pin respectively connected to both sides of the second plate; the second sleeve is sleeved on the second extended rod portion, and the second sliding pin is slidably engaged with the second sliding groove, so that the second transmission component can transmit the rotation of the second rotating component relative to the base and the rotation of the second rotating shaft component relative to the base.

6. The folding device rotating assembly according to claim 5, characterized in that: The rotating assembly of the folding device further includes a first plate, a second plate, a first elastic element, and a second elastic element; The first sleeve plate is rotatably fitted onto the first protruding rod portion and the second protruding rod portion; the end faces of the first sleeve plate and the base are spaced apart to define an accommodating space for accommodating the connecting rod structure; The second sleeve is fitted onto the first protruding rod and the second protruding rod, and is located on the side of the first sleeve and the second sleeve away from the accommodating space; The first elastic element is sleeved outside the first protruding rod, with one end abutting against the outer end of the first protruding rod and the other end elastically pressing the second sleeve plate against the first sleeve, so that the rotation of the first transmission member and the first rotating shaft member relative to the base is damped by the compressive force between the second sleeve plate and the first sleeve. The second elastic element is sleeved outside the second protruding rod, with one end abutting against the outer end of the second protruding rod and the other end elastically pressing the second sleeve plate against the second sleeve, so that the rotation of the second transmission member and the second rotating shaft member relative to the base is damped by the compressive force between the second sleeve plate and the second sleeve.

7. The folding device rotating assembly according to claim 6, characterized in that: The first sleeve has a plurality of circumferentially distributed protrusions at the location corresponding to the second sleeve plate, and a recess is defined between adjacent protrusions; the second sleeve plate has a plurality of circumferentially distributed protrusions at the location corresponding to the first sleeve, and a recess is defined between adjacent protrusions; the protrusions on the first sleeve match the recesses on the second sleeve plate, and the recesses on the first sleeve match the protrusions on the second sleeve plate. The second sleeve has a plurality of circumferentially distributed protrusions corresponding to the second sleeve plate, and a recess is defined between adjacent protrusions; the second sleeve plate has a plurality of circumferentially distributed protrusions corresponding to the second sleeve, and a recess is defined between adjacent protrusions; the protrusions on the second sleeve match the recesses on the second sleeve plate, and the recesses on the second sleeve match the protrusions on the second sleeve plate. The rotating assembly of the folding device also includes a third plate, a first stop, and a second stop. The third sleeve is fitted onto the first protruding rod and the second protruding rod; The first stop member is connected to the outer end of the first rotating shaft member, and the first elastic member presses the third sleeve plate against the first stop member; The second stop is connected to the outer end of the second rotating shaft, and the second elastic member presses the third sleeve against the second stop; The third sleeve is slidably fitted onto the first extension rod and the second extension rod; The first stop is a nut, which is threaded to the first protruding rod to adjust the stop position; The second stop is a nut, which is threaded to the second protruding rod to adjust the stop position.

8. The folding device rotating assembly according to any one of claims 1-7, characterized in that: The base is provided with a first arc-shaped groove and a second arc-shaped groove; The first rotating component includes a first arc-shaped block and a first connecting plate fixedly connected to the first arc-shaped block; the first arc-shaped block is rotatably fitted into the first arc-shaped groove; the first connecting plate is used to connect to the first body of the folding device; The second rotating component includes a second arc-shaped block and a second connecting plate fixedly connected to the second arc-shaped block; the second arc-shaped block is rotatably fitted into the second arc-shaped groove; the second connecting plate is used to connect the second body of the folding device.

9. A folding device, characterized in that, include: First fuselage; Second fuselage; The folding device rotating assembly according to any one of claims 1-8; The first body is connected to the first rotating component, and the second body is connected to the second rotating component.

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