Rotating shaft device and electronic device

Abstract

The present disclosure provides a rotating shaft device and an electronic device. The rotating shaft device comprises a base body provided with a transmission device, the transmission device comprising a first sliding block and two rollers, the first sliding block being in transmission connection with each roller; a first supporting member being in rotational connection with the base body through a first connecting body; a second supporting member and a third supporting member being in rotational connection with the base body through a second connecting body, the first supporting member, the second supporting member and the third supporting member being respectively used for supporting a first part, a second part and a third part of a flexible screen; the first part and the third part abutting against each other on a closing plane so that the rotating shaft device has a closed state; in a process of the rotating shaft device changing to the closed state: at least one of the rollers rotates, thereby driving the first sliding block to slide; the second connecting body drives at least one end of the second supporting member to be away from the closing plane, thereby forming an avoiding space for accommodating the second part.

Description

Technical Field

[0001] This disclosure relates to the field of electronic equipment technology, and more specifically, to a rotating shaft device and an electronic device. Background Technology

[0002] With the development of foldable electronic devices, the design of the combination of flexible screens and hinge structures has received increasing attention. However, most hinge devices for the folding points of flexible screens use gear meshing. Existing gear-type hinge structures have high requirements for the distance between the gear shafts, requiring a specific number and size of gears to match the shaft distance on both sides, which limits the structural layout. Therefore, new hinge devices are needed to meet the bending design requirements of flexible screens. Summary of the Invention

[0003] In view of this, the present disclosure provides a rotating shaft device and an electronic device.

[0004] One aspect of this disclosure provides a rotating shaft device, comprising: a base, a transmission device including a first slider and two rollers, the first slider being tractively connected to each roller; a first support member rotatably connected to the base via a first connector; a second support member and a third support member rotatably connected to the base via a second connector, the first support member, the second support member, and the third support member respectively supporting a first part, a second part, and a third part of a flexible screen; the first part and the third part abut against a closed plane to give the rotating shaft device a closed state, during the process of the rotating shaft device changing to the closed state: at least one of the rollers rotates, thereby driving the first slider to slide; the second connector drives at least one end of the second support member away from the closed plane, forming a clearance space to accommodate the second part.

[0005] According to an embodiment of this disclosure, during the transition of the rotating shaft device to a closed state, the rotation of one of the first rollers and the second rollers drives the first slider to slide along the corresponding sliding track, thereby driving the rotation of the other of the first rollers and the second rollers to remain synchronized through the sliding of the first slider.

[0006] According to an embodiment of this disclosure, the surface of the first roller has a first groove extending spirally along the axial direction of the first roller, the surface of the second roller has a second groove extending spirally along the axial direction of the second roller, and the first slider includes a first protrusion and a second protrusion. The first slider is slidably connected to the first groove through the first protrusion and to the second groove through the second protrusion. During the process of the rotating shaft device changing to a closed state, the sliding trajectory of the first protrusion in the first groove and the sliding trajectory of the second protrusion in the second groove are mirror images of each other.

[0007] According to an embodiment of the present disclosure, during at least a portion of the transition of the rotating shaft device to a closed state, the rotation of one of the first rollers and the second rollers drives the first slider to slide along a corresponding sliding track, while the other of the first rollers and the second rollers remains stationary relative to the base.

[0008] According to embodiments of this disclosure, the surface of the first roller has a third groove and a fourth groove. The third groove extends spirally along the axial direction of the first roller, and the fourth groove is connected to the third groove and extends parallel to the axial direction of the first roller. The surface of the second roller has a fifth groove and a sixth groove. The fifth groove extends parallel to the axial direction of the second roller, and the sixth groove is connected to the fifth groove and extends spirally along the axial direction of the second roller. The first slider is slidably connected to the third groove and the fourth groove via a third protrusion, and the first slider is slidably connected to the fifth groove and the sixth groove via a fourth protrusion. The axial distance of the third groove extending spirally along the axial direction of the first roller is the same as the distance of the fifth groove extending parallel to the axial direction of the second roller, and the distance of the fourth groove extending parallel to the axial direction of the first roller is the same as the axial distance of the sixth groove extending spirally along the axial direction of the second roller.

[0009] According to an embodiment of this disclosure, the first connecting body includes a first connecting arm, which is rotatably connected to the base via a first rotating shaft, and a first roller is fixedly connected to the first rotating shaft and rotates synchronously with the first rotating shaft; the second connecting body includes a second connecting arm, which is rotatably connected to the base via a second rotating shaft, and a second roller is fixedly connected to the second rotating shaft and rotates synchronously with the second rotating shaft; wherein the first rotating shaft and the second rotating shaft are axially parallel, and the sliding track corresponding to the first slider is parallel to the axial direction of the first rotating shaft.

[0010] According to embodiments of this disclosure, the first connecting body includes: a third connecting arm, one end of which is connected to the base via a first bearing, and the other end of which is fixedly connected to a second slider, the second slider being fixedly connected to a first support member, the second slider being configured to slide in a direction parallel to the support surface of the first support member; the first connecting arm, one end of which is rotatably connected to the base via a first pivot, and the other end of which is slidably connected to the second slider; the second connecting body includes: a fourth connecting arm, one end of which is connected to the base via a second bearing, and the other end of which is fixedly connected to a third slider, the third slider being fixedly connected to a third support member, the third slider being configured to slide in a direction parallel to the support surface of the third support member; the second connecting arm, one end of which is rotatably connected to the base via a second pivot, and the other end of which is slidably connected to the third slider.

[0011] According to an embodiment of this disclosure, the second support member includes an arc-shaped first sliding portion and an arc-shaped second sliding portion. The first sliding portion is closer to the base than the second sliding portion. The second support member is slidably connected to the fourth connecting arm through the first sliding portion, and the second support member is slidably connected to the third slider through the second sliding portion.

[0012] According to an embodiment of this disclosure, during the transition of the rotating shaft device to a closed state, the first support member and the third support member abut against each other toward the closed plane, causing the second connecting body to rotate relative to the base. The rotation of the second connecting body relative to the base causes the third slider to slide in a direction parallel to the closed plane, and also causes the third slider to rotate relative to the base. The second connecting body, through the first sliding part, causes the side of the second support member close to the base to move away from the closed plane by a first distance. The third slider, through the second sliding part, causes the side of the second support member away from the base to move away from the closed plane by a second distance. The first distance is greater than or equal to the second distance.

[0013] Another aspect of this disclosure provides an electronic device, including a first body and a second body rotatably connected by a rotating shaft device, and a flexible screen disposed on the first body and the second body. The rotating shaft device includes: a base body with a transmission device, the transmission device including a first slider and two rollers, the first slider being rotatably connected to each roller; a first support member rotatably connected to the base body via a first connector; a second support member and a third support member rotatably connected to the base body via a second connector. The first support member, the second support member, and the third support member are respectively used to support a first part, a second part, and a third part of the flexible screen. The first part and the third part are abutted against a closed plane to give the rotating shaft device a closed state. During the process of the rotating shaft device changing to the closed state: at least one of the rollers rotates, thereby driving the first slider to slide; the second connector drives at least one end of the second support member away from the closed plane, forming a clearance space to accommodate the second part. Attached Figure Description

[0014] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0015] Figure 1 The schematic diagram illustrates the overall structure of the rotating shaft device in an embodiment of this disclosure;

[0016] Figure 2 This schematic diagram illustrates the structure of the rotating shaft device in the unfolded state according to an embodiment of the present disclosure.

[0017] Figure 3 This schematic diagram illustrates the structure of the rotating shaft device in the closed state according to an embodiment of the present disclosure;

[0018] Figure 4 A schematic diagram of the transmission device in an embodiment of this disclosure is shown.

[0019] Figure 5 A schematic diagram illustrating a partial fit between the first slider and the first roller is shown.

[0020] Figure 6 This schematic diagram illustrates another partial fit structure between the first slider and the second roller;

[0021] Figure 7 This diagram illustrates the interaction between the roller and the slider at different stages of the mirror synchronization process.

[0022] Figure 8 This schematic diagram illustrates the overall motion relationship of the transmission device under non-synchronous difference conditions.

[0023] Figure 9 A schematic diagram of the structure of the first and second rollers with segmented groove structures is shown.

[0024] Figure 10 This schematic diagram illustrates the interaction state of the roller and slider at different stages during the asynchronous time difference process.

[0025] Figure 11 This schematic diagram illustrates the assembly relationship between the connecting bodies of the transmission device in an embodiment of the present disclosure;

[0026] Figure 12 The schematic diagram illustrates the specific structure and connection relationship of each connector in the embodiments of this disclosure;

[0027] Figure 13 This illustration schematically shows the dynamic rotation process of the rotating shaft device under a non-synchronous time difference scheme in an embodiment of the present disclosure;

[0028] Figure 14 This schematically illustrates the dynamic rotation process of the rotating shaft device under a mirror synchronization scheme in an embodiment of this disclosure;

[0029] Figure 15 This schematic diagram illustrates the connection relationships between the first connector and the second connector and the first support member and the third support member, respectively, in an embodiment of this disclosure.

[0030] Figure 16 The diagram schematically illustrates the sliding fit between the second support member, the fourth connecting arm, and the third slider in an embodiment of this disclosure, as well as the posture change of the second support member during the closing process.

[0031] Figure label:

[0032] 1-Base; 12-Transmission device; 121-First slider; 1211-First protrusion; 1212-Second protrusion; 1213-Third protrusion; 1214-Fourth protrusion; 122-Roller; 1221-First roller; 12211-First groove; 12212-Third groove; 12213-Fourth groove; 1222-Second roller; 12221-Second groove; 12222-Fifth groove; 12223-Sixth groove;

[0033] 2-First support component;

[0034] 3-Second support member; 31-First sliding part; 32-Second sliding part;

[0035] 4-Third support component;

[0036] 5-First connecting body; 51-First connecting arm; 52-First rotating shaft; 53-Third connecting arm; 54-First bearing; 55-Second slider;

[0037] 6-Second connecting body; 61-Second connecting arm; 62-Second rotating shaft; 63-Fourth connecting arm; 64-Second bearing; 65-Third slider;

[0038] 7 - Part 1; 8 - Part 2; 9 - Part 3; 10 - Closed plane. Detailed Implementation

[0039] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0040] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0041] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0042] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0043] In the embodiments disclosed herein, the collection, updating, analysis, processing, use, transmission, provision, disclosure, and storage of data (e.g., including but not limited to user personal information) comply with relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures have been taken to prevent unauthorized access to user personal information data and to safeguard user personal information security, network security, and national security.

[0044] Figure 1 The schematic diagram illustrates the overall structure of the rotating shaft device in an embodiment of this disclosure. Figure 2 The schematic diagram illustrates the structure of the rotating shaft device in the unfolded state in an embodiment of this disclosure. Figure 3 The schematic diagram illustrates the structure of the rotating shaft device in the closed state in an embodiment of this disclosure. Figure 4 A schematic diagram of the transmission device in an embodiment of this disclosure is shown.

[0045] The embodiments of this disclosure provide a rotating shaft device, including: a base 1, on which a transmission device 12 is provided, the transmission device 12 including a first slider 121 and two rollers 122, the first slider 121 being tractively connected to each roller 122; a first support member 2, rotatably connected to the base 1 via a first connector 5; a second support member 3 and a third support member 4, rotatably connected to the base 1 via a second connector 6, the first support member 2, the second support member 3, and the third support member 4 being used to support a first part 7, a second part 8, and a third part 9 of a flexible screen, respectively; the first part 7 and the third part 9 abut against a closed plane 10 to give the rotating shaft device a closed state, during the process of the rotating shaft device changing to a closed state: at least one of the rollers 122 rotates, thereby driving the first slider 121 to slide; the second connector 6 drives at least one end of the second support member 3 away from the closed plane 10, forming a clearance space to accommodate the second part 8.

[0046] According to the embodiments of this disclosure, during the transition of the rotating shaft device to the closed state, the rotation of the roller is converted into the sliding of the first slider through the transmission connection between the roller and the first slider. Furthermore, the movement of the rollers or connecting bodies on both sides can be coordinated through the first slider. Therefore, the motion transmission during the opening and closing process of the rotating shaft device can be achieved without the need for a gear meshing structure, providing a stable transmission foundation for the second connecting body to drive the second support member. Based on this, during the closing process, the second connecting body drives at least one end of the second support member away from the closing plane, forming a clearance space between the second support member and the closing plane to accommodate the second part of the flexible screen. This makes it easier for the folded area of ​​the flexible screen to form a bending transition that adapts to the P-shaped bending requirements during the closing process, thereby improving the smoothness of the flexible screen bending process and the reliability of opening and closing.

[0047] Reference Appendix Figure 1 The base 1 is located in the central region of the rotating shaft assembly and serves as the mounting base for the transmission device, the first connecting body 5, and the second connecting body 6. The transmission device 12 is mounted on the base 1, and... Figure 1 The center is located in the central region of the base 1. The transmission device includes a first slider 121 and two rollers 122, which are located on opposite sides of the first slider 121, and the first slider 121 is connected to each roller 122 in a transmission manner. Thus, the rotation of the rollers 122 can transmit a force to the first slider 121, causing the first slider 121 to slide relative to the base 1.

[0048] Reference Appendix Figure 4 The first slider 121 is located between two rollers 122, both of which extend along their own axes. The first slider 121 is configured as a component that can move between the two rollers 122, and it forms a mating relationship with each of the two rollers 122.

[0049] Reference Appendix Figure 1 and attached Figure 2 The first support member 2 is rotatably connected to the base 1 via the first connector 5, and the second support member 3 and the third support member 4 are rotatably connected to the base 1 via the second connector 6. The first support member 2, the second support member 3, and the third support member 4 are arranged sequentially along the extension direction of the flexible screen, respectively supporting the first part 7, the second part 8, and the third part 9 of the flexible screen. (See attached diagram) Figure 2 When the rotating shaft device is in the unfolded state, the first support member 2, the second support member 3 and the third support member 4 can provide unfolding support for the flexible screen, so that the first part 7, the second part 8 and the third part 9 maintain a relatively unfolded support state.

[0050] Reference Appendix Figure 3 When the rotating shaft device is in the closed state, the first part 7 and the third part 9 approach each other and abut against the closed plane 10, so that the two sides of the flexible screen are in a mating state. The closed plane 10 can be understood as the reference plane on which the first part 7 and the third part 9 abut or approach each other after the rotating shaft device is closed. The second part 8 is located in the transition area between the first part 7 and the third part 9, and forms a bend when the rotating shaft device is closed.

[0051] The rotating shaft device is attached Figure 2 The unfolded state shown is towards the attached Figure 3During the transition to the closed state, the first connecting body 5 rotates relative to the base 1, causing the first support member 2 to move towards the closed state; the second connecting body 6 rotates relative to the base 1, causing the second support member 3 and the third support member 4 to move towards the closed state. During this process, at least one roller 122 in the transmission device rotates and, through its transmission connection with the first slider 121, causes the first slider 121 to slide, thus enabling the transmission device to participate in the closing motion of the rotating shaft device. During the closing process, the second connecting body 6 causes at least one end of the second support member 3 to move away from the closing plane 10. That is, the second support member 3 does not always remain between the paths where the first part 7 and the third part 9 are in contact, but rather, under the influence of the second connecting body 6, it retracts to the side away from the closing plane 10. After the second support member 3 retracts, a clearance space is formed between it and the closing plane 10, which is used to accommodate the bending area formed by the second part 8 of the flexible screen during the closing process.

[0052] When the rotating shaft device changes from a closed state to an unfolded state, the above-mentioned movement process can be reversed. The second connecting body 6 drives the second support member 3 to gradually return to its original position, and the first connecting body 5 drives the first support member 2 to gradually unfold. The first part 7, the second part 8, and the third part 9 of the flexible screen return to the unfolded support state. During this process, the first slider 121 and the roller 122 can still achieve corresponding reverse movement conversion through the transmission connection.

[0053] According to an embodiment of this disclosure, the transmission device 12 includes a first roller 1221, a second roller 1222, and a first slider 121. The base 1 is provided with a sliding track, and the first slider 121 slides along the corresponding sliding track. During the process of the rotating shaft device changing to a closed state, the rotation of at least one of the first roller 1221 and the second roller 1222 drives the first slider 121 to slide along the corresponding sliding track, and / or the sliding of the first slider 121 along the sliding track drives the rotation of at least one of the first roller 1221 and the second roller 1222.

[0054] Reference Appendix Figure 4 The transmission device 12 includes a first roller 1221, a second roller 1222, and a first slider 121. The first slider 121 is located between the first roller 1221 and the second roller 1222 and can move along the sliding track defined by the base 1. The first roller 1221 and the second roller 1222 are respectively connected to the first slider 121, so that when either the first roller 1221 or the second roller 1222 rotates, the motion can be transmitted to the other through the first slider 121.

[0055] During the transition of the rotating shaft device from the unfolded state to the closed state, one of the first roller 1221 and the second roller 1222 rotates and applies a driving force along the sliding track direction to the first slider 121 through a transmission connection. Under this driving force, the first slider 121 slides relative to the base 1 and drives the other roller to rotate through a transmission connection with it. Thus, a motion transmission relationship is established between the first roller 1221 and the second roller 1222 through the first slider 121.

[0056] In this embodiment, the first slider 121 acts as an intermediate transmission component. The angular displacement of one of the first roller 1221 and the second roller 1222 is first converted into linear displacement by the first slider 121, and this linear displacement is then transmitted to the other and converted into angular displacement. Through this motion conversion path, the first roller 1221 and the second roller 1222 do not need direct gear meshing, and can maintain synchronous or near-synchronous rotation during the transition of the rotating shaft device to the closed state.

[0057] According to an embodiment of this disclosure, during the transition of the rotating shaft device to a closed state, the rotation of one of the first roller 1221 and the second roller 1222 drives the first slider 121 to slide along the corresponding sliding track, thereby driving the other of the first roller 1221 and the second roller 1222 to maintain synchronization through the sliding of the first slider 121.

[0058] Figure 5 A schematic diagram illustrating a partial fit between the first slider and the first roller is shown. Figure 6 A schematic diagram of another partial mating structure between the first slider and the second roller is shown.

[0059] refer to Figures 5 to 6 The transmission device includes a first roller 1221, a second roller 1222, and a first slider 121. The first roller 1221 and the second roller 1222 are respectively disposed on opposite sides of the first slider 121, with the first slider 121 located between the first roller 1221 and the second roller 1222. Both the first roller 1221 and the second roller 1222 are capable of rotating around their respective axes, and the first slider 121 is capable of sliding in a predetermined direction under the constraint of a sliding track provided on the base 1. The sliding track is used to limit the direction of movement of the first slider 121 relative to the base 1, enabling the first slider 121 to reciprocate stably between the two rollers.

[0060] Continue to refer to Figures 5 to 6A first-side transmission engagement area is formed between the first roller 1221 and the first slider 121, and a second-side transmission engagement area is formed between the second roller 1222 and the first slider 121. The first-side transmission engagement area and the second-side transmission engagement area are located on opposite sides of the first slider 121, enabling the first slider 121 to act as a motion relay between the first roller 1221 and the second roller 1222. In other words, the first roller 1221, the first slider 121, and the second roller 1222 sequentially constitute a "rotation-sliding-rotation" transmission path.

[0061] Figure 7 The diagram illustrates the interaction between the roller and the slider at different stages of the mirror synchronization process.

[0062] refer to Figure 7 The left side schematically illustrates the relative arrangement of the first slider 121 between the first roller 1221 and the second roller 1222. The right side schematically illustrates the state where the first roller 1221 and the second roller 1222 rotate when the first slider 121 slides along the corresponding sliding track. Figure 7 In the motion relationship shown, the first roller 1221 can rotate in the left-hand direction shown in the figure, and the second roller 1222 can rotate in the right-hand direction shown in the figure. The two rollers rotate in opposite directions, but both correspond to the sliding stroke of the first slider 121.

[0063] During the transition of the rotating shaft device from the unfolded state to the closed state, when at least one of the first roller 1221 and the second roller 1222 rotates, the roller applies a force along the sliding track direction to the first slider 121 through its transmission engagement with the first slider 121, causing the first slider 121 to slide relative to the base 1. After sliding, the first slider 121 transmits a force to the other roller through its transmission engagement with the other roller, thereby driving the other roller to rotate. Thus, the first roller 1221 and the second roller 1222 can establish a synchronous or near-synchronous linkage relationship through the first slider 121.

[0064] In another motion input method, the first slider 121 can also act as an active moving part. When the first slider 121 slides along the sliding track of the base 1, it acts on the first roller 1221 and the second roller 1222, causing them to rotate around their respective axes. (Reference) Figure 7 During this process, the first roller 1221 and the second roller 1222 can rotate in opposite directions, and their rotational stroke matches the sliding stroke of the first slider 121, thereby achieving mirror-type synchronous transmission of the two rollers.

[0065] When the rotating shaft device changes from a closed state to an unfolded state, the above-mentioned movement process can be reversed. That is, the first slider 121 slides in the opposite direction along the sliding track, or at least one of the first roller 1221 and the second roller 1222 rotates in the opposite direction, thereby driving the other component to move in the opposite direction. Since the first roller 1221 and the second roller 1222 are both connected by the first slider 121, the two rollers can still maintain a synchronous or nearly synchronous reverse rotation relationship during the unfolding process.

[0066] According to an embodiment of this disclosure, the surface of the first roller 1221 has a first groove 12211 extending spirally along the axial direction of the first roller 1221, and the surface of the second roller 1222 has a second groove 12221 extending spirally along the axial direction of the second roller 1222. The first slider 121 includes a first protrusion 1211 and a second protrusion 1212. The first slider 121 is slidably connected to the first groove 12211 via the first protrusion 1211, and to the second groove 12221 via the second protrusion 1212. During the transition of the rotating shaft device to a closed state, the sliding trajectory of the first protrusion 1211 in the first groove 12211 is a mirror image of the sliding trajectory of the second protrusion 1212 in the second groove 12221. (Reference) Figure 5 The surface of the first roller 1221 is provided with a first groove 12211, and the surface of the second roller 1222 is provided with a second groove 12221. The first groove 12211 extends spirally along the axial direction of the first roller 1221, and the second groove 12221 extends spirally along the axial direction of the second roller 1222. Here, "spiral extension" means that the groove on the roller surface does not extend along a single straight line parallel to the roller axis, but has extension components in both the circumferential and axial directions of the roller, so that the groove extends at an angle relative to the roller axis.

[0067] refer to Figures 5 to 6 The first slider 121 is provided with a first protrusion 1211 and a second protrusion 1212. The first protrusion 1211 is located on the side of the first slider 121 facing the first roller 1221, and is used to interact with... Figure 5 The first groove 12211 on the first roller 1221 shown slides in engagement with the second roller 1222. The second protrusion 1212 is disposed on the side of the first slider 121 facing the second roller 1222, for use with… Figure 6 The second groove 12221 on the second roller 1222 shown is slidably engaged. The first protrusion 1211 and the second protrusion 1212 can be respectively embedded in the corresponding groove, so that the first slider 121 and the two rollers form a sliding connection relationship constrained by the groove trajectory.

[0068] refer to Figure 5The first groove 12211 and the second groove 12221 are located on opposite sides of the first slider 121, and their inclination directions correspond to each other. The first groove 12211 is used to define the movement trajectory of the first protrusion 1211 relative to the first roller 1221, and the second groove 12221 is used to define the movement trajectory of the second protrusion 1212 relative to the second roller 1222. Since both the first groove 12211 and the second groove 12221 are grooves that extend spirally along the roller axis, when the roller rotates or the first slider 121 slides, a component force along the sliding track direction will be generated between the protrusion and the groove wall, thereby realizing the conversion between the rotation of the roller and the sliding of the first slider 121.

[0069] refer to Figure 7 During the process of the rotating shaft device changing to the closed state, the first slider 121 slides along the sliding track, the first protrusion 1211 slides along the first groove 12211, and the second protrusion 1212 slides along the second groove 12221. Figure 7 The right side illustrates the state where the first roller 1221 rotates in the left direction and the second roller 1222 rotates in the right direction. Since the spiral extension directions of the first groove 12211 and the second groove 12221 are mirror images of each other, the sliding trajectory of the first protrusion 1211 in the first groove 12211 is a mirror image of the sliding trajectory of the second protrusion 1212 in the second groove 12221.

[0070] Specifically, refer to Figure 7 When the first slider 121 is displaced in one direction along the sliding track, the first protrusion 1211 pushes the first roller 1221 to rotate in the first direction through the first groove 12211, and the second protrusion 1212 pushes the second roller 1222 to rotate in the opposite direction through the second groove 12221. Since the tracks of the two grooves are mirror images of each other, the first protrusion 1211 and the second protrusion 1212 correspond to the same or approximately the same amount of roller rotation under the same sliding stroke, thereby making the first roller 1221 and the second roller 1222 rotate synchronously in a mirror image.

[0071] Alternatively, when at least one of the first roller 1221 and the second roller 1222 rotates as an input end, the groove wall of the first groove 12211 or the second groove 12221 pushes the corresponding protrusion, causing the first slider 121 to slide along the sliding track; the first slider 121 then drives the other roller to rotate through the cooperation between the protrusion on the other side and the groove on the other side. Since the cooperation trajectories of the grooves on both sides and the protrusions on both sides are mirror images of each other, this motion transmission process can keep the first roller 1221 and the second roller 1222 mirror synchronized during the closing process.

[0072] When the rotating shaft device transitions from a closed state to an unfolded state, the first slider 121 slides in the opposite direction along the sliding track, the first protrusion 1211 slides in the opposite direction along the first groove 12211, and the second protrusion 1212 slides in the opposite direction along the second groove 12221. At this time, the first roller 1221 and the second roller 1222 rotate in the opposite direction to the closing process, while the first protrusion 1211 and the second protrusion 1212 still move along mirror images of each other. Therefore, the synchronous or near-synchronous reverse transmission relationship of the two rollers can be maintained during the unfolding process.

[0073] According to an embodiment of this disclosure, during at least a portion of the process of the rotating shaft device transitioning to a closed state, the rotation of one of the first roller 1221 and the second roller 1222 drives the first slider 121 to slide along a sliding track, while the other of the first roller 1221 and the second roller 1222 remains stationary relative to the base 1.

[0074] Figure 8 The schematic diagram illustrates the overall motion relationship of the transmission device under non-synchronous difference motion conditions. Figure 9 The schematic diagram shows the structure of the first and second rollers with segmented groove structures. Figure 10 The diagram illustrates the interaction state of the roller and slider at different stages during the asynchronous time difference process.

[0075] Reference Appendix Figures 8 to 9 The transmission device includes a first roller 1221, a second roller 1222, and a first slider 121. The first roller 1221 and the second roller 1222 are located on opposite sides of the first slider 121, which is positioned between the two rollers and can slide in a predetermined direction under the constraint of a sliding track provided on the base 1. The sliding track is used to limit the direction of movement of the first slider 121 relative to the base 1, so that the first slider 121 performs linear reciprocating motion between the first roller 1221 and the second roller 1222.

[0076] Reference Appendix Figure 10 The transmission device can have a time-differential transmission state during the transition of the rotating shaft device to the closed state. The so-called time-differential transmission state means that during at least part of the closed stroke, the first roller 1221 and the second roller 1222 do not always rotate simultaneously, but one roller is rotating and driving the first slider 121 to slide, while the other roller remains stationary relative to the base 1.

[0077] Specifically, in the first stage, the first roller 1221 can move along the attached... Figure 10The first roller 1221 rotates in the direction indicated by "left turn". When the first roller 1221 rotates, it applies a driving force along the sliding track direction to the first slider 121 through its transmission engagement with the first slider 121, causing the first slider 121 to slide relative to the base 1. During this stage, although the second roller 1222 maintains a mating relationship with the first slider 121, the second roller 1222 does not rotate around its own axis but remains stationary relative to the base 1. That is, the first slider 121 slides relative to the second roller 1222, while the second roller 1222 itself does not participate in rotation. In the second stage, the driving relationship can be switched. At this time, the second roller 1222 can move along the attached track direction. Figure 10 The roller rotates in the "right turn" direction and drives the first slider 121 to continue sliding along the sliding track through the transmission cooperation between the roller and the first slider 121; at the same time, the first roller 1221 remains stationary relative to the base 1. Thus, at different stages of the closed stroke, the first roller 1221 and the second roller 1222 participate in the transmission as the driving side, while the other roller remains stationary relative to the base 1.

[0078] It should be noted that the time-difference motion may exist only in one or more segments of the closed stroke, and it is not required that the rotating shaft device maintain one side rotating and the other side stationary throughout the entire process from the unfolded state to the closed state. After the time-difference motion segment, the transmission device may also enter other forms of linkage stage, such as the stage in which the two rollers rotate synchronously or nearly synchronously, as long as one roller rotates and the other roller remains stationary relative to the base 1 for at least a portion of the closed state transition process.

[0079] When the rotating shaft device transitions from a closed state to an unfolded state, the aforementioned time-difference motion process can be reversed. That is, the first slider 121 slides in the opposite direction along the sliding track, and the roller that was rotating in the later stage during the closing process can first rotate in the opposite direction, while the other roller remains stationary; then the drive relationship is switched again, causing the other roller to rotate in the opposite direction, while the previously rotating roller remains stationary. Thus, during the unfolding process, a time-difference transmission relationship in which one side of the roller rotates while the other side of the roller remains stationary relative to the base 1 can also be formed.

[0080] According to an embodiment of this disclosure, the surface of the first roller 1221 has a third groove 12212 and a fourth groove 12213. The third groove 12212 extends spirally along the axial direction of the first roller 1221, and the fourth groove 12213 is connected to the third groove 12212 and extends parallel to the axial direction of the first roller 1221. The surface of the second roller 1222 has a fifth groove 12222 and a sixth groove 12223. The fifth groove 12222 extends parallel to the axial direction of the second roller 1222, and the sixth groove 12223 is connected to the fifth groove 12222 and extends spirally along the axial direction of the second roller 1222. The first sliding... Block 121 is slidably connected to the third groove 12212 and the fourth groove 12213 via the third protrusion 1213. The first slider 121 is slidably connected to the fifth groove 12222 and the sixth groove 12223 via the fourth protrusion 1214. The axial distance of the third groove 12212 extending spirally along the axis of the first roller 1221 is the same as the distance of the fifth groove 12222 extending parallel to the axis of the second roller 1222. The distance of the fourth groove 12213 extending parallel to the axis of the first roller 1221 is the same as the axial distance of the sixth groove 12223 extending spirally along the axis of the second roller 1222.

[0081] Reference Appendix Figure 9 The surface of the first roller 1221 is provided with a third groove 12212 and a fourth groove 12213 that are interconnected. The third groove 12212 extends helically along the axial direction of the first roller 1221, meaning it has extension components in both the circumferential and axial directions, resulting in an inclined extension on the surface of the first roller 1221. The fourth groove 12213 is connected to the third groove 12212 and extends parallel to the axial direction of the first roller 1221. Here, "extending parallel to the axial direction" means that the fourth groove 12213 mainly extends along the axial direction of the first roller 1221, and does not form a helical guiding component relative to the circumferential direction of the first roller 1221 for driving its rotation.

[0082] The surface of the second roller 1222 is provided with a fifth groove 12222 and a sixth groove 12223 that are interconnected. The fifth groove 12222 extends parallel to the axial direction of the second roller 1222, and the sixth groove 12223 is connected to the fifth groove 12222 and extends spirally along the axial direction of the second roller 1222. In other words, the groove structure on the second roller 1222 is functionally offset from the groove structure on the first roller 1221: on the first roller 1221, a third groove 12212 for generating a rotational driving relationship is first provided, followed by a fourth groove 12213 for allowing relative axial sliding; while on the second roller 1222, a fifth groove 12222 for allowing relative axial sliding is first provided, followed by a sixth groove 12223 for generating a rotational driving relationship.

[0083] Reference Appendix Figure 8 The first slider 121 is provided with a third protrusion 1213 and a fourth protrusion 1214. The third protrusion 1213 is located on the side of the first slider 121 facing the first roller 1221, and is used to interact with the attached... Figure 9 The third groove 12212 and the fourth groove 12213 on the first roller 1221 are slidably engaged. The fourth protrusion 1214 is disposed on the side of the first slider 121 facing the second roller 1222, for use with the attached... Figure 8 and attached Figure 9 The fifth groove 12222 and the sixth groove 12223 on the second roller 1222 are slidably engaged. The third protrusion 1213 and the fourth protrusion 1214 are respectively embedded in the corresponding grooves, so that when the first slider 121 slides along the sliding track, its two sides are guided and constrained by the groove structure on the first roller 1221 and the second roller 1222 respectively.

[0084] Reference Appendix Figure 9 The axial distance corresponding to the spiral extension of the third groove 12212 along the axis of the first roller 1221 is the same as the distance the fifth groove 12222 extends parallel to the axis of the second roller 1222. This axial distance can be understood as the displacement along the axis of the first roller 1221 when the third protrusion 1213 slides along the third groove 12212; the distance the fifth groove 12222 extends parallel to the axis of the second roller 1222 corresponds to the axial displacement of the fourth protrusion 1214 when it slides within the fifth groove 12222. The fact that both are the same ensures that when the third protrusion 1213 completes the stroke corresponding to the third groove 12212, the fourth protrusion 1214 has also essentially completed the stroke corresponding to the fifth groove 12222.

[0085] The distance by which the fourth groove 12213 extends parallel to the axial direction of the first roller 1221 is the same as the axial distance by which the sixth groove 12223 extends spirally along the axial direction of the second roller 1222. That is, when the third protrusion 1213 completes its corresponding axial sliding stroke within the fourth groove 12213, the fourth protrusion 1214 can also complete its corresponding spiral guiding stroke within the sixth groove 12223. Therefore, although the groove segments on both sides of the first slider 121 are not mirror images of each other, they match each other in axial displacement, thus ensuring that the first slider 121 can continuously transition from one timing stage to another.

[0086] Reference Appendix Figure 10During the transition of the rotating shaft device to the closed state, the first slider 121 slides along the sliding track of the base 1. When the third protrusion 1213 is located within the third groove 12212 of the first roller 1221, the third groove 12212, due to its spiral extension along the axial direction of the first roller 1221, can establish a transmission relationship between the rotation of the first roller 1221 and the sliding of the first slider 121. At this time, the first roller 1221 can slide along the attached... Figure 10 The roller rotates in the indicated "left turn" direction, driving the first slider 121 to slide. Simultaneously, the fourth protrusion 1214 is located within the fifth groove 12222 of the second roller 1222. Since the fifth groove 12222 extends parallel to the axial direction of the second roller 1222, the fourth protrusion 1214 can slide axially relative to the fifth groove 12222 without driving the second roller 1222 to rotate around its own axis. Therefore, during this stage, the first roller 1221 rotates, while the second roller 1222 remains stationary relative to the base 1.

[0087] After the first slider 121 continues to slide and completes the first stage of travel, the third protrusion 1213 enters the fourth groove 12213 from the third groove 12212, and the fourth protrusion 1214 enters the sixth groove 12223 from the fifth groove 12222. Since the axial distance of the third groove 12212 is the same as the axial parallel extension distance of the fifth groove 12222, the third protrusion 1213 and the fourth protrusion 1214 can reach the connection position of the corresponding groove segment at the end of the first stage, thereby ensuring that the first slider 121 will not get stuck or be overloaded due to the inconsistent travel of the groove segments on both sides.

[0088] In the second stage, the third protrusion 1213 is located within the fourth groove 12213 of the first roller 1221. Since the fourth groove 12213 extends parallel to the axial direction of the first roller 1221, the third protrusion 1213 can slide axially relative to the fourth groove 12213 without driving the first roller 1221 to rotate about its own axis. Therefore, in this stage, the first roller 1221 is stationary relative to the base 1. Simultaneously, the fourth protrusion 1214 is located within the sixth groove 12223 of the second roller 1222. The sixth groove 12223 extends spirally along the axial direction of the second roller 1222, establishing a transmission relationship between the sliding of the first slider 121 and the rotation of the second roller 1222, allowing the second roller 1222 to move along the attached... Figure 10 The rotation is in the "right turn" direction shown. Thus, the transmission device achieves a time-difference switching from being driven by the first roller 1221 to being driven by the second roller 1222.

[0089] Since the distance by which the fourth groove 12213 extends parallel to the axial direction of the first roller 1221 is the same as the axial distance corresponding to the spiral extension of the sixth groove 12223 along the axial direction of the second roller 1222, the sliding stroke of the third protrusion 1213 in the fourth groove 12213 can match the spiral guiding stroke of the fourth protrusion 1214 in the sixth groove 12223. Thus, in the second stage, the first slider 121 can still maintain continuous and stable sliding without motion interruption caused by the functional switching between the stationary first roller 1221 and the rotating second roller 1222.

[0090] It should be noted that the third groove 12212 and the fifth groove 12222 are not required to have the same or mirrored groove trajectory, nor are the fourth groove 12213 and the sixth groove 12223 required to have the same or mirrored groove trajectory. In the first stage, the third protrusion 1213 corresponds to the spirally extending third groove 12212, while the fourth protrusion 1214 corresponds to the axially parallel extending fifth groove 12222; in the second stage, the third protrusion 1213 corresponds to the axially parallel extending fourth groove 12213, while the fourth protrusion 1214 corresponds to the spirally extending sixth groove 12223.

[0091] When the rotating shaft device transitions from a closed state to an unfolded state, the first slider 121 slides in the opposite direction along the sliding track. At this time, the fourth protrusion 1214 can first slide in the opposite direction along the sixth groove 12223, causing the second roller 1222 to rotate in the opposite direction, while the third protrusion 1213 slides in the opposite direction along the fourth groove 12213, keeping the first roller 1221 stationary relative to the base 1. Subsequently, the fourth protrusion 1214 enters the fifth groove 12222 and slides axially relative to it, the second roller 1222 remains stationary relative to the base 1, and at the same time, the third protrusion 1213 enters the third groove 12212 and drives the first roller 1221 to rotate in the opposite direction. Thus, during the unfolding process, the above-mentioned time-difference transmission relationship can be realized in reverse sequence.

[0092] Furthermore, since this embodiment of the present disclosure defines the time-difference transmission during at least a portion of the process of the rotating shaft device transitioning to a closed state, the third groove 12212, the fourth groove 12213, the fifth groove 12222, and the sixth groove 12223 can correspond only to the time-difference motion interval within the closed stroke. After this time-difference motion interval, slot segments for synchronous or near-synchronous motion can be further provided as needed (e.g., the slot segments in the aforementioned synchronous mirror embodiment, see reference). Figure 5 After the first slider 121 leaves the aforementioned time difference groove section, the first roller 1221 and the second roller 1222 enter a synchronous or near-synchronous rotation stage.

[0093] Through the aforementioned segmented groove structure, the transmission device can enable the first roller 1221 and the second roller 1222 to participate in rotation in stages while the first slider 121 slides continuously: in one stage, the first roller 1221 rotates while the second roller 1222 remains stationary; in another stage, the second roller 1222 rotates while the first roller 1221 remains stationary. This structure, through the combination of helical groove segments and axially parallel groove segments, and the matching of the axial distances of the corresponding groove segments, achieves asynchronous and differential roller transmission relationships.

[0094] According to an embodiment of this disclosure, the first connecting body 5 includes a first connecting arm 51, which is rotatably connected to the base 1 via a first rotating shaft 52. The first roller 1221 is fixedly connected to the first rotating shaft 52 and rotates synchronously with the first rotating shaft 52. The second connecting body 6 includes a second connecting arm 61, which is rotatably connected to the base 1 via a second rotating shaft 62. The second roller 1222 is fixedly connected to the second rotating shaft 62 and rotates synchronously with the second rotating shaft 62. The first rotating shaft 52 and the second rotating shaft 62 are axially parallel, and the sliding track corresponding to the first slider 121 is parallel to the axial direction of the first rotating shaft 52.

[0095] Figure 11 The diagram schematically illustrates the assembly relationship between the connecting bodies of the transmission device in an embodiment of this disclosure. Figure 12 The diagram illustrates the specific structure and connection relationship of each connector in the embodiments of this disclosure.

[0096] This embodiment follows the basic structure of the transmission device 12 in the previous embodiment. The transmission relationship between the first slider 121 and the two rollers 122 in the transmission device 12 can be referred to the appendix. Figure 11 As described in the aforementioned embodiments, the specific transmission method between the first slider 121 and the roller 122 will not be described again here.

[0097] The first connecting body 5 includes a first connecting arm 51, and the second connecting body 6 includes a second connecting arm 61. The first connecting arm 51 and the second connecting arm 61 are located on opposite sides of the base 1, and are respectively configured to correspond to the two rollers 122 in the transmission device 12. For ease of explanation, the roller 122 closer to the first connecting arm 51 can be referred to as the first roller 1221, and the roller 122 closer to the second connecting arm 61 can be referred to as the second roller 1222.

[0098] Reference Appendix Figure 12The first connecting arm 51 is rotatably connected to the base 1 via a first rotating shaft 52. The first rotating shaft 52 serves as the foundation for the rotation of the first connecting arm 51 relative to the base 1, allowing the first connecting arm 51 to rotate relative to the base 1 around its axis. A first roller 1221 is fixedly connected to the first rotating shaft 52, maintaining a synchronous rotational relationship between the first roller 1221 and the first rotating shaft 52. That is, when the first rotating shaft 52 rotates relative to the base 1, the first roller 1221 experiences an angular displacement in the same direction as the first rotating shaft 52. The second connecting arm 61 is rotatably connected to the base 1 via a second rotating shaft 62. The second rotating shaft 62 serves as the foundation for the rotation of the second connecting arm 61 relative to the base 1, allowing the second connecting arm 61 to rotate relative to the base 1 around its axis. A second roller 1222 is fixedly connected to the second rotating shaft 62, maintaining a synchronous rotational relationship between the second roller 1222 and the second rotating shaft 62. Therefore, the rotation of the second shaft 62 can directly correspond to the rotation of the second roller 1222.

[0099] The first rotating shaft 52 and the second rotating shaft 62 are axially parallel. The sliding track corresponding to the first slider 121 extends in a direction parallel to the axis of the first rotating shaft 52. Since the second rotating shaft 62 is axially parallel to the first rotating shaft 52, the sliding direction of the first slider 121 is also parallel to the axis of the second rotating shaft 62. Through the above axial arrangement, the first slider 121 can slide between the first roller 1221 and the second roller 1222 in a direction matching the axes of both, thereby facilitating the conversion between the rotational motion of the rollers and the sliding motion of the first slider 121.

[0100] Figure 13 The illustration schematically shows the dynamic rotation process of the rotating shaft device in the asynchronous time difference scheme of the present disclosure embodiment. Figure 14 The illustration schematically shows the dynamic rotation process of the rotating shaft device under the mirror synchronization scheme in the embodiments of this disclosure.

[0101] Reference Appendix Figure 13 , Figure 13 The five state diagrams in the diagram, arranged in the order indicated by the arrows, together constitute a continuous process of transitioning from an unfolded state to a closed state. During this process, the first connecting body 5 and the second connecting body 6 do not always rotate simultaneously relative to the base body 1, but rather participate in the rotation in stages according to a sequential order.

[0102] Specifically, see the attached document. Figure 13As shown from the top left to the middle left and bottom left, in the first stage of the closing process, the first connecting body 5 remains essentially stationary relative to the base 1, while the second connecting body 6 rotates relative to the base 1. That is, in this stage, the second connecting body 6 moves around its rotational connection position with the base 1, while the first connecting body 5 remains stationary as a relatively static component. This stage can correspond to a motion state in the transmission device where the roller associated with the second connecting body 6 rotates, while the roller associated with the first connecting body 5 remains stationary relative to the base 1.

[0103] After the second connecting body 6 rotates to the predetermined posture, refer to the attached document. Figure 13 As shown in the lower left to lower right and upper right positions, the rotating shaft device enters the second stage. In the second stage, the second connecting body 6 remains essentially stationary relative to the base 1, while the first connecting body 5 begins to rotate relative to the base 1. That is, the closing process changes from the first stage's "second connecting body 6 rotates, first connecting body 5 remains stationary" to the second stage's "first connecting body 5 rotates, second connecting body 6 remains stationary".

[0104] Therefore, attached Figure 13 The process shown illustrates a asynchronous time-difference closure method: the first connecting body 5 and the second connecting body 6 participate in the rotation relative to the base 1 at different time periods, rather than rotating synchronously throughout the entire closure process. When the rotating shaft device transitions from the closed state to the unfolded state, the attached... Figure 13 The process shown can be reversed. That is, the connecting body on one side that moved after the closing phase rotates in the opposite direction, while the connecting body on the other side remains relatively stationary; then the process is switched to the other connecting body rotating in the opposite direction, thus completing the reset from the closed state to the unfolded state.

[0105] Reference Appendix Figure 14 , Figure 14 The multiple state diagrams in the image, arranged from top to bottom, represent the continuous process of the rotating shaft device transitioning from an expanded state to a closed state under a mirror synchronization scheme. (See attached diagram.) Figure 13 The motion differs depending on the stage difference shown, in the appendix Figure 14 During the process shown, the first connector 5 and the second connector 6 rotate simultaneously relative to the base 1 during at least a partial closure.

[0106] Specifically, see the attached document. Figure 14 From top to bottom, the first connecting body 5 and the second connecting body 6 rotate around their respective rotational connection positions with the base body 1, and move towards each other. During the rotation, they form corresponding mirror-like posture changes, that is, the rotational state on one side of the first connecting body 5 corresponds to the rotational state on the other side of the second connecting body 6 in the overall movement trend, so that the two structures can complete the closing action in a relatively coordinated manner.

[0107] During this mirror synchronization process, the first connecting body 5 and the second connecting body 6 can change their angles relative to the base 1 synchronously or nearly synchronously. Correspondingly, the rollers on one side associated with the first connecting body 5 and the rollers on the other side associated with the second connecting body 6 in the transmission device can also rotate synchronously or nearly synchronously, and the coordinated transmission of the movement on both sides is achieved through the first slider 121.

[0108] Therefore, appendix Figure 14 The illustrated scheme demonstrates a synchronous closing process in which the first connecting body 5 and the second connecting body 6 simultaneously participate in rotation and complete attitude changes in a mirror-image manner. When the rotating shaft device transitions from a closed state to an extended state, the attached... Figure 14 The mirror synchronization process shown can be performed in reverse. The first connector 5 and the second connector 6 rotate in opposite directions relative to the base 1 simultaneously or approximately simultaneously, causing the rotating shaft device to gradually return from a closed state to an open state.

[0109] According to an embodiment of this disclosure, the first connecting body 5 includes: a third connecting arm 53, one end of which is connected to the base 1 via a first bearing 54, and the other end of which is fixedly connected to a second slider 55, the second slider 55 being fixedly connected to a first support member 2, and the second slider 55 being configured to slide in a direction parallel to the support surface of the first support member 2; a first connecting arm 51, one end of which is rotatably connected to the base 1 via a first rotating shaft 52, and the other end of which is slidably connected to the second slider 55; the second connecting body 6 includes: a fourth connecting arm 63, one end of which is connected to the base 1 via a second bearing 64, and the other end of which is fixedly connected to a third slider 65, the third slider 65 being fixedly connected to a third support member 4, and the third slider 65 being configured to slide in a direction parallel to the support surface of the third support member 4; a second connecting arm 61, one end of which is rotatably connected to the base 1 via a second rotating shaft 62, and the other end of which is slidably connected to the third slider 65.

[0110] Figure 15 The diagram illustrates the connection relationships between the first connector, the second connector, and the first support member and the third support member, respectively, in an embodiment of this disclosure.

[0111] Reference Appendix Figure 12 and attached Figure 15 Regarding the cooperation relationship between the transmission device 12, the roller 122, and the first slider 121, please refer to the aforementioned embodiments and appendices. Figure 11 Appendix Figure 12 The structure shown will not be repeated in this embodiment. See attached diagram. Figure 15 The first connecting body 5 includes a first connecting arm 51 and a third connecting arm 53. One end of the first connecting arm 51 is connected via an attachment Figure 12The first rotating shaft 52 is rotatably connected to the base 1, allowing the first connecting arm 51 to rotate relative to the base 1 around the first rotating shaft 52. The other end of the first connecting arm 51 is slidably connected to the second slider 55, allowing the first connecting arm 51 to slide relative to the second slider 55 during rotation.

[0112] One end of the third connecting arm 53 is connected to the base 1 via the first bearing 54, and the other end is fixedly connected to the second slider 55. The second slider 55 is fixedly connected to the first support member 2, so that the movement of the second slider 55 can drive the movement of the first support member 2. The second slider 55 is configured to slide in a direction parallel to the support surface of the first support member 2, thereby allowing the first support member 2 to be translated and adjusted relative to the adjacent structure during the opening and closing of the rotating device.

[0113] Thus, the first connecting arm 51 and the third connecting arm 53 work together on the second slider 55. The first connecting arm 51 guides and drives the second slider 55 through its rotation around the first pivot 52 and its sliding engagement with the second slider 55; the third connecting arm 53 is connected to the base 1 through the first bearing 54, and through its fixed connection with the second slider 55, it constrains the motion posture of the second slider 55 and the first support member 2.

[0114] Reference Appendix Figure 12 and attached Figure 15 The second connecting body 6 includes a second connecting arm 61 and a fourth connecting arm 63. One end of the second connecting arm 61 is rotatably connected to the base 1 via a second rotating shaft 62, allowing the second connecting arm 61 to rotate relative to the base 1 around the second rotating shaft 62. The other end of the second connecting arm 61 is slidably connected to a third slider 65, allowing the second connecting arm 61 to slide relative to the third slider 65 during rotation.

[0115] One end of the fourth connecting arm 63 is connected to the base 1 via the second bearing 64, and the other end is fixedly connected to the third slider 65. The third slider 65 is fixedly connected to the third support member 4, so that the movement of the third slider 65 can drive the movement of the third support member 4. The third slider 65 is configured to slide in a direction parallel to the support surface of the third support member 4, thereby allowing the third support member 4 to be translated and adjusted relative to the base during opening and closing.

[0116] Thus, the second connecting arm 61 and the fourth connecting arm 63 work together on the third slider 65. The second connecting arm 61 guides and drives the third slider 65 through its rotation around the second pivot 62 and its sliding engagement with the third slider 65; the fourth connecting arm 63 is connected to the base 1 through the second bearing 64, and through its fixed connection with the third slider 65, it constrains the motion posture of the third slider 65 and the third support member 4.

[0117] During the transition of the rotating shaft device to the closed state, the first support member 2 can perform a compound movement relative to the base 1 via the second slider 55, the first connecting arm 51, and the third connecting arm 53; the third support member 4 can perform a compound movement relative to the base 1 via the third slider 65, the second connecting arm 61, and the fourth connecting arm 63. The compound movement includes rotation and sliding adjustment along the support surface direction, enabling the first support member 2 and the third support member 4 to adjust their relative positions as they approach the closed plane 10.

[0118] When the rotating shaft device changes from the closed state to the unfolded state, the above-mentioned movement process can be reversed. The first support member 2 drives the second slider 55 to slide in the opposite direction, and the first connecting arm 51 and the third connecting arm 53 return to their original positions relative to the base 1; the third support member 4 drives the third slider 65 to slide in the opposite direction, and the second connecting arm 61 and the fourth connecting arm 63 return to their original positions relative to the base 1, thereby restoring the first support member 2 and the third support member 4 to their unfolded support state.

[0119] According to the embodiments of this disclosure, the second support member 3 includes an arc-shaped first sliding portion 31 and an arc-shaped second sliding portion 32. The first sliding portion 31 is closer to the base 1 than the second sliding portion 32. The second support member 3 is slidably connected to the fourth connecting arm 63 through the first sliding portion 31, and the second support member 3 is slidably connected to the third slider 65 through the second sliding portion 32.

[0120] Figure 16 The diagram schematically illustrates the sliding fit between the second support member, the fourth connecting arm, and the third slider in an embodiment of this disclosure, as well as the posture change of the second support member during the closing process.

[0121] Reference Appendix Figure 16 This embodiment mainly describes the sliding fit relationship between the second support member 3 and the second connecting body 6. The second support member 3 is disposed between the base 1 and the third support member 4, and is used to provide support or avoidance fit for the second part 8 of the flexible screen. The second support member 3 includes a first sliding part 31 and a second sliding part 32. Both the first sliding part 31 and the second sliding part 32 are arc-shaped structures, allowing the second support member 3 to adjust its posture relative to adjacent components through an arc-shaped guiding method. Among them, the first sliding part 31 is disposed closer to the base 1 than the second sliding part 32, and the second sliding part 32 is disposed closer to the side of the third slider 65 and the third support member 4 than the first sliding part 31.

[0122] The second support member 3 is slidably connected to the fourth connecting arm 63 via the first sliding part 31. When the fourth connecting arm 63 moves relative to the base 1, it can guide the side of the second support member 3 closest to the base 1 via the first sliding part 31, causing the side of the second support member 3 closest to the base 1 to move along the arc-shaped trajectory of the first sliding part 31. The second support member 3 is also slidably connected to the third slider 65 via the second sliding part 32. When the third slider 65 moves with the third support member 4, it can guide the side of the second support member 3 away from the base 1 via the second sliding part 32, causing the side of the second support member 3 away from the base 1 to move along the arc-shaped trajectory of the second sliding part 32.

[0123] Through the cooperation of the first sliding part 31 and the second sliding part 32, the second support member 3 is not driven by a single connection point, but is simultaneously constrained by two positions: the fourth connecting arm 63 and the third slider 65. Since both the first sliding part 31 and the second sliding part 32 are arc-shaped structures, the second support member 3 can slide in an arc relative to the fourth connecting arm 63 and the third slider 65 during the opening and closing process, thereby allowing the posture of the second support member 3 to be adjusted with the movement of the third support member 4 and the second connecting body 6.

[0124] When the rotating shaft device changes from the closed state to the unfolded state, the fourth connecting arm 63 and the third slider 65 can slide in opposite directions along the first sliding part 31 and the second sliding part 32 respectively, so that the second support member 3 gradually returns to the unfolded support position.

[0125] According to the embodiments of this disclosure, during the process of the rotating shaft device changing to a closed state, the first support member and the third support member abut against each other towards the closed plane, causing the second connecting body to rotate relative to the base. The rotation of the second connecting body relative to the base causes the third slider to slide in a direction parallel to the closed plane, and also causes the third slider to rotate relative to the base. The second connecting body, through the first sliding part, causes the side of the second support member close to the base to move away from the closed plane by a first distance. The third slider, through the second sliding part, causes the side of the second support member away from the base to move away from the closed plane by a second distance. The first distance is greater than or equal to the second distance.

[0126] Reference Appendix Figure 16 , Figure 16 The upper part shows the relative positional relationship between the second support member 3, the fourth connecting arm 63, and the third slider 65 when the rotating shaft device is in the deployed or nearly deployed state. Figure 16 The lower part shows the posture change of the second support member 3 after the rotating shaft device changes to the closed state.

[0127] Combined with appendix Figure 3 and attached Figure 16During the transition of the rotating shaft device to the closed state, the first support member 2 and the third support member 4 respectively drive the first part 7 and the third part 9 of the flexible screen to come into contact with each other on the closed plane 10. When the third support member 4 moves towards the closed plane 10, it drives the third slider 65 to move; the third slider 65 is connected to the second connecting body 6, therefore, the movement of the third slider 65 can drive the second connecting body 6 to rotate relative to the base 1.

[0128] Reference Appendix Figure 15 and attached Figure 16 When the second connecting body 6 rotates relative to the base 1, the fourth connecting arm 63 rotates around the position corresponding to the second bearing 64, and the second connecting arm 61 rotates around the position corresponding to the second pivot 62, together driving the third slider 65 to move. The third slider 65 slides along a direction parallel to the closed plane 10 on the one hand, and rotates relative to the base 1 with the movement of the second connecting body 6 on the other hand, so that the third support 4 can perform both translation and rotation adjustment during the closing process.

[0129] During the above process, the fourth connecting arm 63 acts on the side of the second support member 3 near the base 1 via the first sliding part 31. Since the first sliding part 31 has an arc-shaped structure, when the fourth connecting arm 63 slides along the first sliding part 31, it causes the side of the second support member 3 near the base 1 to move along an arc-shaped trajectory and gradually move away from the closed plane 10. The displacement of this side away from the closed plane 10 can be defined as the first distance.

[0130] Simultaneously, the third slider 65 acts on the side of the second support member 3 away from the base 1 via the second sliding part 32. Since the second sliding part 32 is also an arc-shaped structure, when the third slider 65 slides along the second sliding part 32, it will cause the side of the second support member 3 away from the base 1 to also move away from the closed plane 10. The displacement of this side away from the closed plane 10 can be defined as the second distance.

[0131] The amount of recess of the second support member 3 on the side closer to the substrate 1 relative to the closed plane 10 is greater than or equal to the amount of recess of the second support member 3 on the side farther from the substrate 1 relative to the closed plane 10, that is, the first distance is greater than or equal to the second distance. As a result, the second support member 3 forms an attitude in which the side closer to the substrate 1 recesses more and the side farther from the substrate 1 recesses less during the closing process, so that the second support member 3 and the second part 8 of the flexible screen form an approximately P-shaped receiving contour.

[0132] Through the above-mentioned movement, when the first part 7 and the third part 9 are close to the closed plane 10, the second support 3 can actively move away from the closed plane 10, especially the side closer to the substrate 1, forming a larger avoidance space, thereby providing a space for the bending area of ​​the second part 8 of the flexible screen.

[0133] Embodiments of this disclosure provide an electronic device, including a first body and a second body rotatably connected by a rotating shaft device, and a flexible screen disposed on the first body and the second body. The rotating shaft device includes: a base, provided with a transmission device, the transmission device including a first slider and two rollers, the first slider being rotatably connected to each roller; a first support member, rotatably connected to the base via a first connector; a second support member and a third support member, rotatably connected to the base via a second connector. The first support member, the second support member, and the third support member are respectively used to support a first part, a second part, and a third part of the flexible screen. The first part and the third part are abutted against a closed plane to give the rotating shaft device a closed state. During the process of the rotating shaft device changing to the closed state: at least one of the rollers rotates, thereby driving the first slider to slide; the second connector drives at least one end of the second support member away from the closed plane, forming a clearance space to accommodate the second part.

[0134] When the electronic device is in the unfolded state, the first support member 2, the second support member 3, and the third support member 4 are arranged sequentially along the extension direction of the flexible screen. Specifically, the first support member 2 supports the first part 7 of the flexible screen, the second support member 3 supports the second part 8 of the flexible screen, and the third support member 4 supports the third part 9 of the flexible screen. In the unfolded state, the first part 7, the second part 8, and the third part 9 together form a relatively flat display support area, enabling the flexible screen to be displayed in an unfolded state.

[0135] The base 1 is located in the central region of the rotating shaft device. The first support member 2 is connected to the base 1 via the first connector 5, and the second support member 3 and the third support member 4 are connected to the base 1 via the second connector 6. A transmission device in the rotating shaft device is located on the base 1 and is used to coordinate the movement of the first connector 5 and the second connector 6 during the opening and closing of the electronic device. The specific transmission relationships between the transmission device, the roller, the first slider, and the various connectors can adopt the structures described in the previous embodiments, and will not be repeated here.

[0136] When the electronic device transitions from an unfolded state to a closed state, the first and second bodies move closer together under the action of the rotating shaft device, causing the first part 7 and the third part 9 of the flexible screen to gradually come into contact with the closing plane 10. The closing plane 10 can be understood as the reference plane on which the first part 7 and the third part 9 move closer or come into contact with each other after the electronic device is closed.

[0137] During the closing process, at least one of the rollers 122 in the rotating shaft device rotates, causing the first slider 121 to slide, thereby enabling the transmission structure in the rotating shaft device to participate in the closing motion of the electronic device. Simultaneously, the second connecting body 6 moves at least one end of the second support member 3 away from the closing plane 10, causing the second support member 3 to retract relative to the closing plane 10. After the second support member 3 retracts, a clearance space is formed between the second support member 3 and the closing plane 10 to accommodate the second part 8 of the flexible screen. The second part 8 of the flexible screen is located between the first part 7 and the third part 9, forming a bending area during the closing process of the electronic device.

[0138] With the above configuration, when the electronic device is closed, the first part 7 and the third part 9 can approach each other and abut against the closed plane 10, while the second part 8 can form a curved transition within the clearance space. When the electronic device changes from the closed state to the unfolded state, the first body and the second body rotate in opposite directions via the rotating shaft device. At this time, the second connecting body 6 drives the second support member 3 to gradually return to the unfolded support position, so that the second support member 3 provides support for the second part 8 of the flexible screen again; the first support member 2 and the third support member 4 support the first part 7 and the third part 9 respectively, so that the flexible screen gradually returns to the attached position. Figure 2 The expanded display state is shown below.

[0139] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A rotating shaft device, comprising: The base is provided with a transmission device, which includes a first slider and two rollers, and the first slider is connected to each of the rollers in a transmission connection. The first support member is rotatably connected to the base body via a first connector; The second and third support members are rotatably connected to the base through the second connector. The first, second, and third support members are respectively used to support the first, second, and third parts of the flexible screen. The first part and the third part are pressed against each other on the closed plane so that the rotating shaft device is in a closed state. During the process of the rotating shaft device changing to the closed state: at least one of the rollers rotates, thereby driving the first slider to slide; the second connecting body drives at least one end of the second support member away from the closed plane, forming a clearance space to accommodate the second part.

2. In the rotating shaft device according to claim 1, during the process of the rotating shaft device changing to the closed state, the rotation of one of the first roller and the second roller drives the first slider to slide along the corresponding sliding track, thereby driving the rotation of the other of the first roller and the second roller to remain synchronized through the sliding of the first slider.

3. The rotating shaft device according to claim 2, wherein the surface of the first roller has a first groove extending helically along the axial direction of the first roller, the surface of the second roller has a second groove extending helically along the axial direction of the second roller, the first slider includes a first protrusion and a second protrusion, the first slider being slidably connected to the first groove via the first protrusion, and the first slider being slidably connected to the second groove via the second protrusion. During the transition of the rotating shaft device to the closed state, the sliding trajectory of the first protrusion in the first groove is a mirror image of the sliding trajectory of the second protrusion in the second groove.

4. The rotating shaft device according to claim 1, wherein during at least a portion of the transition of the rotating shaft device to the closed state, the rotation of one of the first roller and the second roller drives the first slider to slide along a corresponding sliding track, and the other of the first roller and the second roller is stationary relative to the base.

5. The rotating shaft device according to claim 4, The surface of the first roller has a third groove and a fourth groove. The third groove extends spirally along the axial direction of the first roller, and the fourth groove is connected to the third groove and extends parallel to the axial direction of the first roller. The surface of the second roller has a fifth groove and a sixth groove. The fifth groove extends parallel to the axial direction of the second roller, and the sixth groove is connected to the fifth groove and extends spirally along the axial direction of the second roller. The first slider is slidably connected to the third groove and the fourth groove via the third protrusion, and the first slider is slidably connected to the fifth groove and the sixth groove via the fourth protrusion; The axial distance of the third groove extending spirally along the axis of the first roller is the same as the distance of the fifth groove extending parallel to the axis of the second roller, and the distance of the fourth groove extending parallel to the axis of the first roller is the same as the axial distance of the sixth groove extending spirally along the axis of the second roller.

6. The rotating shaft device according to claim 1, wherein the first connecting body includes a first connecting arm, the first connecting arm is rotatably connected to the base through a first rotating shaft, and the first roller is fixedly connected to the first rotating shaft and rotates synchronously with the first rotating shaft; The second connecting body includes a second connecting arm, which is rotatably connected to the base via a second rotating shaft. The second roller is fixedly connected to the second rotating shaft and rotates synchronously with the second rotating shaft. in, The first rotating shaft and the second rotating shaft are axially parallel, and the sliding track corresponding to the first slider is parallel to the axis of the first rotating shaft.

7. The rotating shaft device according to claim 1, wherein the first connecting body comprises: The third connecting arm has one end connected to the base via the first bearing and the other end fixedly connected to the second slider. The second slider is fixedly connected to the first support member and is configured to slide in a direction parallel to the support surface of the first support member. The first connecting arm has one end rotatably connected to the base via a first rotating shaft, and the other end slidably connected to the second slider; The second connector includes: The fourth connecting arm is connected to the base body at one end via the second bearing and fixedly connected to the third slider at the other end. The third slider is fixedly connected to the third support member and is configured to slide in a direction parallel to the support surface of the third support member. The second connecting arm has one end rotatably connected to the base via a second rotating shaft, and the other end slidably connected to the third slider.

8. The rotating shaft device according to claim 7, wherein the second support member includes an arc-shaped first sliding portion and an arc-shaped second sliding portion, the first sliding portion being closer to the base relative to the second sliding portion, the second support member being slidably connected to the fourth connecting arm through the first sliding portion, and the second support member being slidably connected to the third slider through the second sliding portion.

9. The rotating shaft device according to claim 8, wherein during the process of the rotating shaft device changing to the closed state, the first support member and the third support member abut against each other towards the closed plane, causing the second connecting body to rotate relative to the base, and the rotation of the second connecting body relative to the base causes the third slider to slide in a direction parallel to the closed plane, and also causes the third slider to rotate relative to the base. The second connector, through the first sliding part, causes the side of the second support member closest to the base to move away from the closed plane by a first distance. The third slider, through the second sliding part, causes the side of the second support member away from the base to move away from the closed plane by a second distance. The first distance is greater than or equal to the second distance.

10. An electronic device comprising a first body and a second body rotatably connected by a pivot device, and a flexible screen disposed on the first body and the second body, the pivot device comprising: The base is provided with a transmission device, which includes a first slider and two rollers, and the first slider is connected to each of the rollers in a transmission connection. The first support member is rotatably connected to the base body via a first connector; The second and third support members are rotatably connected to the base through the second connector. The first, second, and third support members are respectively used to support the first, second, and third parts of the flexible screen. The first part and the third part are pressed against each other on the closed plane so that the rotating shaft device is in a closed state. During the process of the rotating shaft device changing to the closed state: at least one of the rollers rotates, thereby driving the first slider to slide; the second connecting body drives at least one end of the second support member away from the closed plane, forming a clearance space to accommodate the second part.

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