Flexible heat-conductive sheet and foldable device
By designing flexible heat-conducting sheets with specific dimensions and connection methods, the problem of insufficient heat dissipation in foldable devices with three or more folds has been solved, achieving efficient heat dissipation and temperature uniformity, and improving the reliability and quietness of the devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-06-23
AI Technical Summary
Existing foldable devices with three or more folds have insufficient heat dissipation performance, making it difficult to fully utilize the space between multiple shells for efficient heat dissipation.
A flexible heat-conducting sheet is designed, comprising multiple segments arranged along its extension direction. Through specific dimensional design and connection method, heat is efficiently conducted to each housing. Wear-resistant and lubricating layers are combined to improve reliability and smooth sliding.
It achieves efficient heat dissipation for foldable devices with three or more folds, improves temperature uniformity and thermal conductivity between shells, reduces the risk of damage to the device during folding and unfolding, and enhances quiet operation.
Smart Images
Figure CN224401886U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic device technology, and in particular to a flexible heat-conducting sheet and a foldable device. Background Technology
[0002] With the development of smartphones, tablets, and other electronic devices, electronic devices are becoming increasingly versatile. Larger screen sizes enhance the user experience for many functions. However, larger screens also lead to larger overall sizes, making them less portable. To balance large screens with portability, foldable devices have emerged.
[0003] With the diversification of user needs, two-fold foldable devices can no longer meet the needs of some users, and three-fold and above foldable devices have emerged. How to achieve efficient heat dissipation of three-fold and above foldable devices has become a technical problem that urgently needs to be solved. Utility Model Content
[0004] This application provides a flexible heat-conducting sheet and a foldable device, which facilitates efficient heat dissipation of foldable devices with three or more folds.
[0005] A first aspect of this application provides a flexible heat-conducting sheet for use in a foldable device. The flexible heat-conducting sheet includes a first segment, a second segment, a third segment, a fourth segment, and a fifth segment arranged along its extension direction. The third segment includes a first side and a second side, located on different sides of the third segment. The first segment is connected to the first side via the second segment, and the fifth segment is connected to the second side via the fourth segment. In the extension direction of the first side, the dimension of the third segment is larger than the dimension of the second segment. In the extension direction of the second side, the dimension of the third segment is larger than the dimension of the fourth segment.
[0006] The foldable device includes a first housing, a second housing, a third housing, a first rotating shaft mechanism, and a second rotating shaft mechanism. One end of the second housing is rotatably connected to the first housing via the first rotating shaft mechanism, and the other end of the second housing is rotatably connected to the third housing via the second rotating shaft mechanism. A first segment is disposed at the first housing, a second segment is disposed at the first rotating shaft mechanism, a third segment is disposed at the second housing, a fourth segment is disposed at the second rotating shaft mechanism, and a fifth segment is disposed at the third housing.
[0007] The flexible heat-conducting sheet provided in this application has smaller dimensions for the second and fourth segments, facilitating the passage of the second segment through or across the first rotating shaft mechanism and the passage of the fourth segment through or across the second rotating shaft mechanism. This allows the first segment to be positioned at the first housing, the third segment at the second housing, and the fifth segment at the third housing. Because the heat conduction paths between the third segment and both the first and fifth segments are short, heat can be efficiently conducted from the third segment to the first and fifth segments, resulting in better temperature uniformity among the first, second, and third housings. This allows for full utilization of the first, second, and third housings for heat dissipation, facilitating efficient heat dissipation in foldable devices with three or more folds. Furthermore, the larger size of the third segment results in higher heat conduction efficiency between the third segment and the second housing, further improving the heat dissipation performance of the foldable device.
[0008] In one possible implementation, the flexible heat-conducting sheet includes a multi-layer structure arranged along its thickness direction. The multi-layer structure includes a heat-conducting main layer and a wear-resistant layer. The heat-conducting main layer has a wear-resistant layer on at least one side along the thickness direction of the flexible heat-conducting sheet. Thus, the wear-resistant layer protects the heat-conducting main layer from damage due to friction, resulting in better reliability of the flexible heat-conducting sheet.
[0009] In one possible implementation, the second and fourth segments are provided with wear-resistant layers. Thus, the wear-resistant layer in the second segment prevents damage to the heat-conducting main body layer from relative sliding between the second segment and the first rotating shaft mechanism, and the wear-resistant layer in the fourth segment prevents damage to the heat-conducting main body layer from relative sliding between the fourth segment and the second rotating shaft mechanism, thereby helping to maintain the thermal conductivity of the flexible heat-conducting sheet.
[0010] In one possible implementation, at least one of the first and fifth segments is provided with a wear-resistant layer. Thus, the wear-resistant layer on the first segment makes it less likely that relative sliding of the first segment will damage the heat-conducting main body layer, and the wear-resistant layer on the fifth segment makes it less likely that relative sliding of the fifth segment will damage the heat-conducting main body layer, thereby facilitating the slidable arrangement of at least one of the first and fifth segments relative to the housing assembly on the housing assembly.
[0011] In one possible implementation, the multi-layer structure of the flexible heat-conducting sheet includes a lubricating layer located on its surface. This allows for smoother relative sliding of the flexible heat-conducting sheet, reducing the likelihood of wrinkles that could affect the light and shadow effects of the flexible screen. Furthermore, the smoother relative sliding also reduces noise generated during sliding, resulting in better noise reduction for the foldable device. Additionally, the lubricating layer prevents damage from friction, improving the reliability of the flexible heat-conducting sheet.
[0012] In one possible implementation, a lubricating layer is provided on both sides of the flexible heat-conducting sheet along its thickness direction. This allows for smoother sliding between the flexible heat-conducting sheet and the housing assembly and the flexible screen.
[0013] In one possible implementation, the surfaces of the second and fourth segments are provided with lubricating layers. Thus, the lubricating layer on the second segment allows for smoother sliding between the second segment and the first rotating shaft mechanism, and the lubricating layer on the fourth segment allows for smoother sliding between the fourth segment and the second rotating shaft mechanism. This makes it less likely for the sliding of the flexible heat-conducting sheet to generate significant noise, cause wrinkles that affect the light and shadow of the flexible screen, or damage the flexible heat-conducting sheet.
[0014] In one possible implementation, at least one of the first and fifth segments has a lubricating layer on its surface. The lubricating layer on the first segment makes the sliding of the first segment smoother, and the lubricating layer on the fifth segment makes the sliding of the fifth segment smoother, thereby facilitating the smooth sliding of at least one of the first and fifth segments relative to the housing assembly.
[0015] In one possible implementation, the dimension of the first segment is greater than or equal to the dimension of the second segment in the extension direction of the first side. This allows for a larger heat exchange surface between the first segment and the first housing, resulting in higher thermal conductivity between them and better temperature uniformity between the first and second housings, which is beneficial for improving the heat dissipation performance of the foldable device.
[0016] In one possible implementation, the fifth segment's dimension is greater than or equal to the fourth segment's dimension in the extending direction of the second side. This allows for a larger heat exchange surface between the fifth segment and the third housing, resulting in higher thermal conductivity between them and better temperature uniformity between the second and third housings, thus improving the heat dissipation performance of the foldable device.
[0017] A second aspect of this application provides a foldable device, which includes a housing assembly, a flexible screen, and a flexible heat-conducting sheet as described in any of the above embodiments. The housing assembly includes a first housing, a second housing, a third housing, a first pivot mechanism, and a second pivot mechanism. One end of the second housing is rotatably connected to the first housing via the first pivot mechanism, and the other end of the second housing is rotatably connected to the third housing via the second pivot mechanism. The flexible screen includes a first portion opposite to the first housing, a second portion opposite to the second housing, and a third portion opposite to the third housing. A first segment of the flexible heat-conducting sheet is located between the first portion and the first housing; a third segment of the flexible heat-conducting sheet is located between the second portion and the second housing and is fixedly connected to the second housing; a fifth segment of the flexible heat-conducting sheet is located between the third portion and the third housing; a first side extends axially along the first pivot mechanism; and a second side extends axially along the second pivot mechanism.
[0018] In this way, the distance between the second housing and the first and third housings on both sides is small. The heat conduction paths through the third section of the second housing to the first section of the first housing and to the fifth section of the third housing are both short. This allows the heat generated by the devices in the second housing to be conducted relatively evenly to the first, second, and third housings. The temperature uniformity of the first, second, and third housings is good. The heat generated by the devices in the second housing can be dissipated more efficiently through the first, second, and third housings, which facilitates efficient heat dissipation of foldable devices with three or more folds.
[0019] In one possible implementation, the second segment of the flexible heat-conducting sheet can slide relative to the first rotating shaft mechanism, and the fourth segment of the flexible heat-conducting sheet can slide relative to the second rotating shaft mechanism. In this way, during the folding and unfolding process of the housing assembly, the flexible heat-conducting sheet can be easily folded and unfolded under the drive of the housing assembly. The folding and unfolding of the housing assembly is less likely to cause stretching of the flexible heat-conducting sheet, resulting in better reliability and less susceptibility to damage.
[0020] In one possible implementation, the foldable device also includes a motherboard disposed on the second housing. With the motherboard located on the second housing and the third segment of the flexible heat-conducting sheet fixedly connected to the second housing, heat generated by components such as the central processing unit mounted on the motherboard is conducted to the first, second, and third housings for heat dissipation.
[0021] In one possible implementation, the second segment of the flexible heat-conducting sheet is located between the flexible screen and the first rotating shaft mechanism. This eliminates the need for a channel within the first rotating shaft mechanism for the second segment to pass through, thus reducing structural limitations on the first rotating shaft mechanism. It also facilitates the placement of the second segment connecting the first and third segments within a relatively small first rotating shaft mechanism, resulting in better temperature uniformity between the first and second housings while simplifying the installation of the flexible heat-conducting sheet.
[0022] In one possible implementation, the first segment can slide relative to the first housing. During the folding and unfolding process of the housing assembly, the first segment can be easily folded and unfolded relative to the third segment under the drive of the first housing. The flexible heat-conducting sheet is not easily damaged due to the pulling between the first segment and the second segment caused by the folding and unfolding of the foldable device, nor is the light and shadow of the flexible screen easily affected by the wrinkles generated by the folding and unfolding of the foldable device.
[0023] In one possible implementation, the first pivot mechanism includes a first support structure for supporting the flexible screen. The first pivot mechanism has a first channel located on the side of the first support structure opposite to the flexible screen, and a second segment of the flexible heat-conducting sheet passes through this first channel. This way, the wrinkles generated by the second segment are less likely to affect the light and shadow on the flexible screen. By creating a redundant structure in the second segment when the foldable device is in the unfolded state, the flexible heat-conducting sheet is less prone to stretching, thus eliminating the need for the first segment to slide relative to the first housing, allowing for more flexible placement of the first segment.
[0024] In one possible implementation, the first segment is fixedly connected to the first housing. This prevents the first segment from developing wrinkles that could affect the light and shadow of the flexible screen. Furthermore, the first segment is less likely to generate noise due to sliding relative to the first housing. Additionally, a lubrication layer and a wear-resistant layer can be omitted from the first segment, reducing the cost of the flexible heat-conducting sheet. Attached Figure Description
[0025] Figure 1 A schematic diagram of a foldable device in an unfolded state, provided as an embodiment of this application;
[0026] Figure 2 A schematic diagram of another foldable device provided in the embodiments of this application in an unfolded state;
[0027] Figure 3 A schematic diagram illustrating the interaction between a flexible heat-conducting sheet and a housing assembly when a foldable device is in its unfolded state, as provided in an embodiment of this application.
[0028] Figure 4 A schematic cross-sectional view of the first and second housings of a foldable device in an unfolded state, provided as an embodiment of this application;
[0029] Figure 5 A cross-sectional schematic diagram of the first and second housings of another foldable device provided in the embodiments of this application when it is in the unfolded state;
[0030] Figure 6 A cross-sectional schematic diagram of the first and second housings of another foldable device provided in the embodiments of this application when it is in the unfolded state;
[0031] Figure 7 A cross-sectional schematic diagram of the first and second housings of another foldable device provided in the embodiments of this application when it is in the unfolded state;
[0032] Figure 8 A schematic diagram illustrating the interaction between the flexible heat-conducting sheet and the housing assembly in the unfolded state of another foldable device provided in this application embodiment;
[0033] Figure 9 This is a schematic diagram showing the cooperation between the flexible heat-conducting sheet and the shell assembly when the foldable device provided in this application is in the unfolded state.
[0034] Explanation of reference numerals in the attached figures:
[0035] 100. Housing assembly; 110. First housing; 120. Second housing; 130. Third housing; 140. First rotating shaft mechanism; 141. First support structure; 142. First bearing seat; 143. First channel; 150. Second rotating shaft mechanism;
[0036] 200. Flexible screen; 210. Part 1; 220. Part 2; 230. Part 3; 240. Part 4; 250. Part 5;
[0037] 300, Flexible thermal conductive sheet; 310, Thermal conductive body layer; 320, Wear-resistant layer; 320a, First wear-resistant layer; 320b, Second wear-resistant layer; 330, Lubricating layer; 330a, First lubricating layer; 330b, Second lubricating layer;
[0038] 400. Motherboard;
[0039] S1, First paragraph; S2, Second paragraph; S3, Third paragraph; S4, Fourth paragraph; S5, Fifth paragraph;
[0040] L1, first side; L2, second side;
[0041] x, first direction; y, second direction; z, third direction. Detailed Implementation
[0042] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0043] This application provides a foldable device with folded and unfolded states. The foldable device can change its shape by folding and unfolding to meet the needs of users in different scenarios. For example, it can be folded when carried to reduce its length or width; when in use, it can be unfolded to increase the area of the display screen used for display or operation. The foldable device can also be referred to as user equipment (UE) or a terminal, etc.
[0044] The foldable devices provided in this application embodiment may include, but are not limited to, mobile phones, portable Android devices (PADs), laptops, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, in-vehicle devices, wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes.
[0045] Figure 1 This is a schematic diagram of a foldable device in its unfolded state, provided as an embodiment of this application. Figure 2 This is a schematic diagram illustrating another foldable device in its unfolded state, as provided in an embodiment of this application. In the figure, the x-direction is a first direction, the y-direction is a second direction, and the z-direction is a third direction. The z-direction represents the thickness direction of the foldable device in its unfolded state, and either the x-direction or the y-direction represents the length direction of the foldable device in its unfolded state, while the other represents the width direction. For example, the x-direction can be the length direction of the foldable device in its unfolded state, and the y-direction can be the width direction of the foldable device in its unfolded state.
[0046] like Figure 1 , Figure 2 As shown in the embodiment of this application, the foldable device includes a foldable housing assembly 100 and a flexible screen 200 disposed on the housing assembly 100. The housing assembly 100 includes a first housing 110, a second housing 120, a third housing 130, a first pivot mechanism 140, and a second pivot mechanism 150. One end of the second housing 120 is rotatably connected to the first housing 110 through the first pivot mechanism 140, and the other end of the second housing 120 is rotatably connected to the third housing 130 through the second pivot mechanism 150, so that the foldable device can switch between a folded state and an unfolded state.
[0047] When the foldable device is in the unfolded state, the first housing 110 and the second housing 120 rotate until the included angle between them is approximately 180°, and the third housing 130 and the second housing 120 rotate until the included angle between them is approximately 180°. Those skilled in the art will understand that the included angle of approximately 180° referred to in this application may not be an absolute 180° due to design tolerances and other reasons, and slight deviations are allowed, such as 165°, 177°, or 185°.
[0048] When the foldable device is in the folded state, the first housing 110 and the second housing 120 rotate to overlap each other, and the third housing 130 and the second housing 120 rotate to overlap each other. At this time, the first housing 110 and the third housing 130 can be located on the same side in the thickness direction of the second housing 120, or the first housing 110 and the third housing 130 can be located on different sides in the thickness direction of the second housing 120.
[0049] In some examples, the first housing 110 and the third housing 130 can be rotatably connected to opposite ends of the second housing 120 via a first rotating shaft mechanism 140 and a second rotating shaft mechanism 150, respectively. For example, the first housing 110 and the third housing 130 can be rotatably connected to opposite ends of the second housing 120 in a first direction via a first rotating shaft mechanism 140 and a second rotating shaft mechanism 150, respectively. In other examples, the first housing 110 can be rotatably connected to one end of the second housing 120 in the first direction via a first rotating shaft mechanism 140, and the third housing 130 can be rotatably connected to one end of the second housing 120 in a second direction via a second rotating shaft. This application embodiment uses the example of the first housing 110 being rotatably connected to one end of the second housing 120 in the first direction via a first rotating shaft mechanism 140, and the third housing 130 being rotatably connected to the other end of the second housing 120 in the first direction via a second rotating shaft mechanism 150 for illustration.
[0050] For example, the axes of the first pivot mechanism 140 and the second pivot mechanism 150 can be parallel to each other. For instance, the axial directions of the first pivot mechanism 140 and the second pivot mechanism 150 can be parallel to a first direction, or they can be parallel to a second direction. That is, the axial directions of the first pivot mechanism 140 and the second pivot mechanism 150 can be the length direction of the foldable device, or they can be the width direction of the foldable device.
[0051] In an example where the axes of the first pivot mechanism 140 and the second pivot mechanism 150 are parallel to the first direction, when the foldable device is in the unfolded state, the first housing 110, the second housing 120, and the third housing 130 are arranged side by side along the second direction.
[0052] In an example where the axes of the first pivot mechanism 140 and the second pivot mechanism 150 are parallel to the second direction, when the foldable device is in the unfolded state, the first housing 110, the second housing 120, and the third housing 130 are arranged side by side along the first direction.
[0053] like Figure 1 , Figure 2 As shown, the flexible screen 200 is disposed on one side of the housing assembly 100 in the thickness direction. The housing assembly 100 is used to support the flexible screen 200, which can be used to display information and provide an interactive interface for users.
[0054] For example, the flexible screen 200 may include, but is not limited to, an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MOLED) display, a micro light-emitting diode (MLED) display, a micro organic light-emitting diode (MOLED) display, a quantum dot light-emitting diode (QD) display, etc.
[0055] The flexible screen 200 includes a first part 210 opposite to the first housing 110, a second part 220 opposite to the second housing 120, a third part 230 opposite to the third housing 130, a fourth part 240 opposite to the first rotating mechanism 140, and a fifth part 250 opposite to the second rotating mechanism 150. The first part 210 is connected to the second part 220 through the fourth part 240, and the second part 220 is connected to the third part 230 through the fifth part 250. The first housing 110 is used to support the first part 210, the second housing 120 is used to support the second part 220, the third housing 130 is used to support the third part 230, the first rotating mechanism 140 is used to support the fourth part 240, and the second rotating mechanism 150 is used to support the fifth part 250.
[0056] For example, the first part 210 can be fixedly connected to the first housing 110 by means of adhesive or other methods.
[0057] For example, the second part 220 can be fixedly connected to the second housing 120 by means of adhesive bonding or the like.
[0058] For example, the third part 230 can be fixedly connected to the third housing 130 by means of adhesive bonding or the like.
[0059] When the first housing 110 rotates relative to the second housing 120, the first housing 110 can drive the first part 210 to rotate relative to the second housing 120. When the third housing 130 rotates relative to the second housing 120, the third housing 130 can drive the third part 230 to rotate relative to the second housing 120. So that when the foldable device switches between the unfolded state and the folded state, the flexible screen 200 unfolds and bends under the drive of the first housing 110 and the third housing 130.
[0060] The foldable device also includes a motherboard 400, which is located within the housing assembly 100 and electrically connected to the flexible screen 200. The motherboard 400 may house devices such as a central processing unit (CPU), a graphics processing unit (GPU), and memory. For example, the motherboard 400 may also house a system-on-a-chip (SOC), which integrates the CPU, GPU, and memory.
[0061] Figure 3 This is a schematic diagram illustrating the interaction between a flexible heat-conducting sheet and a housing assembly when a foldable device is in its unfolded state, as provided in an embodiment of this application.
[0062] The components inside foldable devices generate heat during operation. To improve the heat dissipation performance of foldable devices, such as... Figure 3 As shown, the foldable device also includes a flexible heat-conducting sheet 300. The flexible heat-conducting sheet 300 is disposed on the side of the flexible screen 200 facing the housing assembly 100. The flexible heat-conducting sheet 300 is used to conduct the heat generated by the devices inside the foldable device to different positions of the housing assembly 100 in a relatively uniform manner. In other words, the flexible heat-conducting sheet 300 can be used to improve the temperature uniformity of different positions of the housing assembly 100, so that the heat generated by the devices inside the foldable device can be dissipated through different positions of the housing assembly 100.
[0063] In related technologies, for foldable devices with three or more folds, flexible heat-conducting sheets are often fixedly connected to the first housing located at the edge of the foldable device. Due to the large gap between the first and third housings, the heat conduction path from the first housing to the third housing through the flexible heat-conducting sheet is long and the heat conduction efficiency is low. As a result, the flexible heat-conducting sheet fixedly connected to the first housing often only extends through or across the first rotating shaft mechanism to the second housing located in the middle of the foldable device. In other words, one end of the flexible heat-conducting sheet is located in the first housing and the other end is located in the second housing. The heat generated by the devices in the first housing can be conducted relatively evenly to the first and second housings and dissipated through the first and second housings.
[0064] In related technologies, for foldable devices with three or more folds, the temperature uniformity between the first and second shells where the flexible heat-conducting sheet is located is good. However, the third shell, which does not have a flexible heat-conducting sheet, has a large temperature difference with the first and second shells, making it difficult for the foldable device to fully utilize the first, second, and third shells for heat dissipation. The heat dissipation performance of foldable devices in related technologies needs to be further improved.
[0065] like Figure 3 As shown, based on this, in this embodiment of the application, the flexible heat-conducting sheet 300 includes a first segment S1, a second segment S2, a third segment S3, a fourth segment S4, and a fifth segment S5 arranged along the extension direction of the flexible heat-conducting sheet 300. The third segment S3 includes a first side L1 and a second side L2, which are located on different sides of the third segment S3. The first side L1 extends axially along the first rotating shaft mechanism 140, and the second side L2 extends axially along the second rotating shaft mechanism 150. The first segment S1 is connected to the first side L1 through the second segment S2, and the fifth segment S5 is connected to the second side L2 through the fourth segment S4.
[0066] For example, the first segment S1, the second segment S2, the third segment S3, the fourth segment S4, and the fifth segment S5 are integrated into a single structure, which makes the thermal conductivity between the various parts of the flexible heat-conducting sheet 300 better.
[0067] In the extending direction of the first side L1, the size of the third segment S3 is larger than that of the second segment S2. That is, in the axial direction of the first rotating shaft mechanism 140, the size of the third segment S3 is larger than that of the second segment S2, so that the fourth segment S4 can pass through or cross the first rotating shaft mechanism 140, thereby facilitating the arrangement of the first segment S1 and the third segment S3 in the first housing 110 and the second housing 120, respectively. In addition, the larger size of the third segment S3 allows for a larger heat exchange surface between the third segment S3 and the second housing 120, resulting in higher thermal conductivity between the third segment S3 and the second housing 120, which is beneficial for improving the heat dissipation performance of the foldable device.
[0068] In the extending direction of the second side L2, the size of the third segment S3 is larger than that of the fourth segment S4. That is, in the axial direction of the second rotating shaft mechanism 150, the size of the third segment S3 is larger than that of the fourth segment S4, so that the fifth segment S5 can pass through or cross the second rotating shaft mechanism 150. This facilitates the arrangement of the third segment S3 and the fifth segment S5 in the second housing 120 and the third housing 130, respectively. In addition, the larger size of the third segment S3 allows for a larger heat exchange surface between the third segment S3 and the second housing 120, resulting in higher thermal conductivity between the third segment S3 and the second housing 120, which is beneficial for improving the heat dissipation performance of the foldable device.
[0069] The first segment S1 of the flexible heat-conducting sheet 300 is located between the first part 210 and the first housing 110. The third segment S3 of the flexible heat-conducting sheet 300 is located between the second part 220 and the second housing 120 and is fixedly connected to the second housing 120. The fifth segment S5 of the flexible heat-conducting sheet 300 is located between the third part 230 and the third housing 130. That is, the flexible heat-conducting sheet 300 is fixedly connected to the second housing 120 via the third segment S3 located between the second part 220 and the second housing 120, and the third segment S3 is connected to the first segment S1 extending between the first part 210 and the first housing 110 via the second segment S2, and the third segment S3 is connected to the fifth segment S5 extending between the third part 230 and the third housing 130 via the fourth segment S4.
[0070] Thus, the distances between the second housing 120 and the first housing 110 and the third housing 130 on both sides are small. The heat conduction paths through the third segment S3 of the second housing 120 to the first segment S1 of the first housing 110 and to the fifth segment S5 of the third housing 130 are both short. This allows the heat generated by the devices within the second housing 120 to be conducted relatively evenly to the first housing 110, the second housing 120, and the third housing 130, resulting in good temperature uniformity among the first housing 110, the second housing 120, and the third housing 130. The heat generated by the devices inside 20 can be dissipated relatively efficiently through the first housing 110, the second housing 120 and the third housing 130. In other words, by using the flexible heat-conducting sheet 300 fixed to the second housing 120 and extending to the first housing 110 and the third housing 130 at both ends, the temperature difference between the first housing 110, the second housing 120 and the third housing 130 can be reduced, which is conducive to making full use of the first housing 110, the second housing 120 and the third housing 130 for heat dissipation, so as to achieve efficient heat dissipation of foldable devices with three or more folds.
[0071] For example, the third segment S3 can be fixedly connected to the second housing 120 by adhesive bonding.
[0072] For example, the first housing 110, the second housing 120 and the third housing 130 can conduct heat to the flexible heat-conducting sheet 300 through at least one of contact heat conduction and radiation heat conduction.
[0073] For example, the first side L1 and the second side L2 are located on both sides of the third segment S3 in the first direction, and both the first side L1 and the second side L2 extend along the second direction. That is, in the second direction, the size of the third segment S3 is larger than the size of the second segment S2, and the size of the third segment S3 is larger than the size of the fourth segment S4.
[0074] In some possible implementations, the motherboard 400 is disposed on the second housing 120. The central processing unit and other devices disposed on the motherboard 400 generate a large amount of heat during operation. The motherboard 400 is disposed on the second housing 120, and the third segment S3 of the flexible heat-conducting sheet 300 is fixedly connected to the second housing 120, so as to facilitate the conduction of the heat generated by the central processing unit and other devices disposed on the motherboard 400 to the first housing 110, the second housing 120 and the third housing 130 for heat dissipation.
[0075] In some possible implementations, the second segment S2 can slide relative to the first rotating shaft mechanism 140, and the fourth segment S4 can slide relative to the second rotating shaft mechanism 150, so that during the folding and unfolding process of the housing assembly 100, the flexible heat-conducting sheet 300 can be easily folded and unfolded under the drive of the housing assembly 100. The folding and unfolding of the housing assembly 100 is less likely to cause pulling on the flexible heat-conducting sheet 300, and the flexible heat-conducting sheet 300 has good reliability and is not easily damaged.
[0076] In some possible implementations, in the extension direction of the first side L1, the size of the first segment S1 is greater than or equal to the size of the second segment S2. This allows for a larger heat exchange surface between the first segment S1 and the first housing 110, resulting in higher thermal conductivity between the first segment S1 and the first housing 110, which is beneficial for improving the heat dissipation performance of the foldable device.
[0077] In some possible implementations, in the extension direction of the second side L2, the size of the fifth segment S5 is greater than or equal to the size of the fourth segment S4. This allows for a larger heat exchange surface between the fifth segment S5 and the third housing 130, resulting in higher thermal conductivity between the fifth segment S5 and the third housing 130, which is beneficial for improving the heat dissipation performance of the foldable device.
[0078] Figure 4 This is a cross-sectional schematic diagram of the first and second housings of a foldable device in an unfolded state, as provided in an embodiment of this application.
[0079] like Figure 4As shown, the flexible heat-conducting sheet 300 includes at least one structural layer arranged along the thickness direction of the flexible heat-conducting sheet 300, wherein one structural layer is a heat-conducting main layer 310. The heat-conducting main layer 310 is a structural layer that realizes efficient heat conduction. The first segment S1, the second segment S2, the third segment S3, the fourth segment S4 and the fifth segment S5 are all provided with heat-conducting main layers 310, so that heat can be conducted between the first segment S1, the second segment S2, the third segment S3, the fourth segment S4 and the fifth segment S5.
[0080] For example, the thermally conductive host layer 310 may include, but is not limited to, a graphene film layer, a graphite film layer, etc.
[0081] In some examples, the thermally conductive substrate 310 is a graphene film layer, which gives the flexible thermally conductive sheet 300 good thermal conductivity. The graphene film layer includes a graphene sheet and an encapsulation film covering the graphene sheet.
[0082] like Figure 4 As shown, in some possible embodiments, the flexible heat-conducting sheet 300 includes a multilayer structure arranged along the thickness direction of the flexible heat-conducting sheet 300. In addition to the heat-conducting main layer 310, the multilayer structure also includes a wear-resistant layer 320, that is, at least one structural layer is a wear-resistant layer 320. The heat-conducting main layer 310 has a wear-resistant layer 320 on at least one side in the thickness direction of the flexible heat-conducting sheet 300.
[0083] Thus, the wear-resistant layer 320 protects the heat-conducting main layer 310 from damage due to friction, and the flexible heat-conducting sheet 300 has good reliability.
[0084] For example, the material of the wear-resistant layer 320 may include at least one of plastic, metal, etc.
[0085] For example, the wear-resistant layer 320 and the thermally conductive main body layer 310 can be bonded and fixed together.
[0086] For example, the location of the wear-resistant layer can be determined according to the location where the flexible heat-conducting sheet 300 rubs against the housing assembly 100 and the flexible screen 200. The wear-resistant layer 320 can be provided at the location where the flexible heat-conducting sheet 300 rubs, and the wear-resistant layer 320 can be omitted at the location where the flexible heat-conducting sheet 300 does not rub.
[0087] When the thermally conductive main layer 310 is a graphene film layer, the wear-resistant layer 320 can be disposed on the surface of the encapsulation film material.
[0088] like Figure 4As shown, in some examples, the heat-conducting main body layer 310 has wear-resistant layers 320 on both sides of the flexible heat-conducting sheet 300 in the thickness direction. This prevents damage to both sides of the heat-conducting main body layer 310 in the thickness direction of the flexible heat-conducting sheet 300 due to friction. The wear-resistant layers 320 located on both sides of the heat-conducting main body layer 310 in the thickness direction of the flexible heat-conducting sheet 300 are respectively a first wear-resistant layer 320a and a second wear-resistant layer 320b. For example, the wear-resistant layer 320 located on the side of the heat-conducting main body layer 310 closer to the flexible screen 200 is the first wear-resistant layer 320a, and the wear-resistant layer 320 located on the side of the heat-conducting main body layer 310 away from the flexible screen 200 is the second wear-resistant layer 320b.
[0089] For example, the portion of the flexible heat-conducting sheet 300 that can slide relative to the housing assembly 100 and the flexible screen 200 may be provided with a wear-resistant layer 320, so that the relative sliding of the flexible heat-conducting sheet 300 with the housing assembly 100 and the flexible screen 200 is less likely to cause damage to the heat-conducting main layer 310, which helps to maintain the heat conduction performance of the flexible heat-conducting sheet 300.
[0090] like Figure 4 As shown, in some possible embodiments, in addition to the heat-conducting main layer 310, the multilayer structure of the flexible heat-conducting sheet 300 also includes a lubricating layer 330, that is, at least one structural layer is a lubricating layer 330. The lubricating layer 330 is located on the surface of the flexible heat-conducting sheet 300.
[0091] This allows for smoother relative sliding of the flexible heat-conducting sheet 300, reducing the likelihood of wrinkles that could affect the light and shadow effects of the flexible screen 200. Furthermore, the smoother relative sliding of the flexible heat-conducting sheet 300 also reduces noise generated during sliding, resulting in better noise reduction for the foldable device. Additionally, the lubrication layer 330 prevents damage to the flexible heat-conducting sheet 300 due to friction, thus improving its reliability.
[0092] For example, the lubricating layer 330 can be a grease layer.
[0093] For example, the location of the lubricating layer 330 can be determined according to the position where the flexible heat-conducting sheet 300 slides relative to the housing assembly 100 and the flexible screen 200. The lubricating layer 330 can be provided at the position where the flexible heat-conducting sheet 300 slides relative to other components, and the lubricating layer 330 can be omitted at the position where the flexible heat-conducting sheet 300 does not slide relative to other components.
[0094] like Figure 4As shown, in some possible embodiments, lubrication layers 330 are provided on both sides of the flexible heat-conducting sheet 300 in the thickness direction. This allows for smoother sliding between the flexible heat-conducting sheet 300 and the housing assembly 100 and the flexible screen 200. The lubrication layers 330 located on both sides of the flexible heat-conducting sheet 300 in the thickness direction are respectively a first lubrication layer 330a and a second lubrication layer 330b. For example, the lubrication layer 330 located on the side of the flexible heat-conducting sheet 300 closer to the flexible screen 200 is the first lubrication layer 330a, and the lubrication layer 330 located on the side of the flexible heat-conducting sheet 300 farther from the flexible screen 200 is the second lubrication layer 330b.
[0095] For example, the portion of the flexible heat-conducting sheet 300 that can slide relative to the housing assembly 100 and the flexible screen 200 may be provided with a lubrication layer 330, so that the relative sliding of the flexible heat-conducting sheet 300 with the housing assembly 100 and the flexible screen 200 is relatively smooth.
[0096] like Figure 4 As shown, in some possible implementations, the second segment S2 is provided with a wear-resistant layer 320, so that the relative sliding between the second segment S2 and the first rotating shaft mechanism 140 is less likely to cause damage to the heat-conducting main body layer 310, which is beneficial to maintaining the heat conduction performance of the flexible heat-conducting sheet 300.
[0097] For example, the heat-conducting main body layer 310 of the second segment S2 has wear-resistant layers 320 on both sides of the flexible heat-conducting sheet 300 in the thickness direction. That is, the second segment S2 has a first wear-resistant layer 320a and a second wear-resistant layer 320b.
[0098] like Figure 4 As shown, in some possible embodiments, the surface of the second segment S2 is provided with a lubricating layer 330, which makes the sliding between the second segment S2 and the first rotating shaft mechanism 140 smoother, and the second segment S2 is less likely to produce wrinkles that affect the light and shadow of the flexible screen 200. In addition, the noise when the second segment S2 slides is less. Furthermore, the second segment S2 is less likely to be damaged due to relative sliding with the first rotating shaft mechanism 140.
[0099] For example, in the thickness direction of the flexible heat-conducting sheet 300, lubrication layers 330 are provided on both sides of the second segment S2. That is, the surface of the second segment S2 is provided with a first lubrication layer 330a and a second lubrication layer 330b.
[0100] In some possible implementations, the fourth segment S4 is provided with a wear-resistant layer 320, so that the relative sliding between the fourth segment S4 and the second rotating shaft mechanism 150 is less likely to cause damage to the heat-conducting main body layer 310, which is beneficial to maintaining the heat conduction performance of the flexible heat-conducting sheet 300.
[0101] For example, the heat-conducting main body layer 310 of the fourth segment S4 has wear-resistant layers 320 on both sides of the flexible heat-conducting sheet 300 in the thickness direction. That is, the fourth segment S4 has a first wear-resistant layer 320a and a second wear-resistant layer 320b.
[0102] In some possible implementations, the surface of the fourth segment S4 is provided with a lubricating layer 330, which makes the sliding between the fourth segment S4 and the second rotating shaft mechanism 150 smoother, and the fourth segment S4 is less likely to produce wrinkles that affect the light and shadow of the flexible screen 200. In addition, the noise during the sliding of the fourth segment S4 is less. Furthermore, the fourth segment S4 is less likely to be damaged due to relative sliding with the second rotating shaft mechanism 150.
[0103] For example, in the thickness direction of the flexible heat-conducting sheet 300, both sides of the fourth segment S4 are provided with a lubricating layer 330. That is, the surface of the fourth segment S4 is provided with a first lubricating layer 330a and a second lubricating layer 330b.
[0104] like Figure 4 As shown, in some possible implementations, the second segment S2 of the flexible heat-conducting sheet 300 is located between the flexible screen 200 and the first rotating shaft mechanism 140.
[0105] In this way, there is no need to form a channel for the second segment S2 to pass through in the first rotating shaft mechanism 140, which reduces the structural restrictions on the first rotating shaft mechanism 140. It is convenient to set the second segment S2 to connect the first segment S1 and the third segment S3 in the smaller first rotating shaft mechanism 140. This makes it easier to set the flexible heat-conducting sheet 300 while having better temperature uniformity between the first housing 110 and the second housing 120.
[0106] The first rotating shaft mechanism 140 includes a first support structure 141 and a first bearing seat 142. The first support structure 141 is disposed on the first bearing seat 142, and the first bearing seat 142 is used to support the first support structure 141. The first support structure 141 is used to support the flexible screen 200.
[0107] When the second segment S2 of the flexible heat-conducting sheet 300 is located between the flexible screen 200 and the first rotating shaft mechanism 140, the second segment S2 is located between the first support structure 141 and the flexible screen 200.
[0108] For example, the first support structure 141 may be a first door panel assembly, which may include two door panels rotatably connected to the two sides opposite to the first bearing 142.
[0109] In some examples where the second segment S2 of the flexible heat-conducting sheet 300 is located between the flexible screen 200 and the first rotating shaft mechanism 140, the first segment S1 can slide relative to the first housing 110.
[0110] In this way, during the folding and unfolding process of the housing assembly 100, the first segment S1 can be folded and unfolded relatively easily relative to the third segment S3 under the drive of the first housing 110. The first segment S1 and the second segment S2 are not easily pulled by the folding and unfolding of the foldable device, which would damage the flexible heat-conducting sheet 300. The folding and unfolding of the foldable device would also not easily cause wrinkles that would affect the light and shadow of the flexible screen 200.
[0111] like Figure 3 As shown, in some examples where the first segment S1 can slide relative to the first housing 110, in the extension direction of the first side L1, the size of the first segment S1 is equal to the size of the second segment S2. This makes it less likely for the first segment S1 to affect the relative sliding between the flexible heat-conducting sheet 300 and the first rotating shaft mechanism 140, while allowing the first segment S1 to have a larger size. This, in turn, allows for higher heat exchange efficiency between the first segment S1 and the first housing 110, and better temperature uniformity between the first housing 110 and the second housing 120.
[0112] like Figure 4 As shown, in some examples where the first segment S1 can slide relative to the first housing 110, the first segment S1 is provided with a wear-resistant layer 320, so that the relative sliding of the first segment S1 is less likely to cause damage to the heat-conducting main body layer 310.
[0113] In some examples where the first segment S1 can slide relative to the first housing 110, the surface of the first segment S1 is provided with a lubricating layer 330, which makes the sliding between the first segment S1 and the first housing 110 smoother.
[0114] For example, the first segment S1 may be provided with a first lubricating layer 330a and a second lubricating layer 330b.
[0115] When the first housing 110 is not prone to friction with the first segment S1 and the flexible screen 200 is prone to friction with the first segment S1, the first segment S1 can be provided with a first wear-resistant layer 320a but without a second wear-resistant layer 320b.
[0116] Figure 5 This is a cross-sectional schematic diagram of the first and second housings of another foldable device provided in the embodiments of this application when it is in the unfolded state.
[0117] like Figure 5 As shown, when both the first housing 110 and the flexible screen 200 are prone to friction with the first segment S1, the first segment S1 may be provided with a first wear-resistant layer 320a and a second wear-resistant layer 320b.
[0118] When the first housing 110 is prone to friction with the first segment S1 and the flexible screen 200 is not prone to friction with the first segment S1, the first segment S1 can be provided with a second wear-resistant layer 320b instead of a first wear-resistant layer 320a.
[0119] In some possible implementations, the fourth segment S4 of the flexible heat-conducting sheet 300 is located between the flexible screen 200 and the second rotating shaft mechanism 150.
[0120] In this way, there is no need to form a channel for the fourth segment S4 to pass through in the second rotating shaft mechanism 150, which reduces the structural restrictions on the second rotating shaft mechanism 150. It is convenient to set the fourth segment S4 to connect the third segment S3 and the fifth segment S5 in the smaller second rotating shaft mechanism 150. This makes it easier to set the flexible heat-conducting sheet 300 while ensuring good temperature uniformity between the third housing 130 and the second housing 120.
[0121] The second rotating shaft mechanism 150 includes a second support structure and a second shaft seat. The second support structure is disposed on the second shaft seat, which is used to support the second support structure. The second support structure is used to support the flexible screen 200. When the fourth segment S4 of the flexible heat-conducting sheet 300 is located between the flexible screen 200 and the second rotating shaft mechanism 150, the fourth segment S4 is located between the second support structure and the flexible screen 200.
[0122] For example, the second support structure may be a second door panel assembly, which may include two door panels rotatably connected to the two sides opposite to the second bearing seat.
[0123] In some examples where the fourth segment S4 of the flexible heat-conducting sheet 300 is located between the flexible screen 200 and the second rotating shaft mechanism 150, the fifth segment S5 can slide relative to the third housing 130.
[0124] In this way, during the folding and unfolding process of the housing assembly 100, the fifth segment S5 can be folded and unfolded relatively easily relative to the third segment S3 under the drive of the third housing 130. The fourth segment S4 and the fifth segment S5 are less likely to be pulled due to the folding and unfolding of the foldable device, which would damage the flexible heat-conducting sheet 300. They are also less likely to be affected by the folds generated by the folding and unfolding of the foldable device, which would affect the light and shadow of the flexible screen 200.
[0125] In some examples where the fifth segment S5 can slide relative to the third housing 130, in the extension direction of the second side L2, the size of the fifth segment S5 is equal to the size of the fourth segment S4. This makes it less likely for the fifth segment S5 to affect the relative sliding between the flexible heat-conducting sheet 300 and the second rotating shaft mechanism 150, while allowing the fifth segment S5 to have a larger size. This, in turn, allows for higher heat exchange efficiency between the fifth segment S5 and the third housing 130, and better temperature uniformity between the third housing 130 and the second housing 120.
[0126] In some examples where the fifth segment S5 can slide relative to the third housing 130, the fifth segment S5 is provided with a wear-resistant layer 320, so that the relative sliding of the fifth segment S5 is less likely to cause damage to the heat-conducting main body layer 310.
[0127] In some examples where the fifth segment S5 can slide relative to the third housing 130, the surface of the fifth segment S5 is provided with a lubricating layer 330, which makes the sliding between the fifth segment S5 and the third housing 130 smoother.
[0128] For example, the fifth segment S5 may be provided with a first lubricating layer 330a and a second lubricating layer 330b.
[0129] When the third housing 130 is not prone to friction with the fifth segment S5, and the flexible screen 200 is prone to friction with the fifth segment S5, the fifth segment S5 can be provided with a first wear-resistant layer 320a, but without a second wear-resistant layer 320b.
[0130] When the third housing 130 and the flexible screen 200 are prone to friction with the fifth segment S5, the fifth segment S5 may be provided with a first wear-resistant layer 320a and a second wear-resistant layer 320b.
[0131] When the third housing 130 is prone to friction with the fifth segment S5 and the flexible screen 200 is not prone to friction with the fifth segment S5, the fifth segment S5 can be provided with a second wear-resistant layer 320b instead of a first wear-resistant layer 320a.
[0132] The third segment S3 is fixedly connected to the second housing 120. The third segment S3 is not prone to friction with the second housing 120. The third segment S3 may not have a second wear-resistant layer 320b and a second lubricating layer 330b.
[0133] When the flexible screen 200 is not prone to friction with the third segment S3, the third segment S3 may not have the first wear-resistant layer 320a and the first lubrication layer 330a.
[0134] Figure 6 This is a cross-sectional schematic diagram of the first and second housings of another foldable device provided in the embodiments of this application when it is in the unfolded state.
[0135] like Figure 6 As shown, when the flexible screen 200 is prone to friction with the third segment S3, the third segment S3 may be provided with a first wear-resistant layer 320a and a first lubricating layer 330a.
[0136] Figure 7 This is a cross-sectional schematic diagram of the first and second housings of another foldable device provided in the embodiments of this application when it is in the unfolded state.
[0137] like Figure 7As shown, in some possible embodiments, the first rotating shaft mechanism 140 has a first channel 143 located on the side of the first support structure 141 away from the flexible screen 200, and the second segment S2 of the flexible heat-conducting sheet 300 passes through the first channel 143.
[0138] In this way, the wrinkles generated by the second segment S2 are less likely to affect the light and shadow of the flexible screen 200. The flexible heat-conducting sheet 300 is less likely to be pulled by forming a redundant structure in the second segment S2 when the foldable device is in the unfolded state. As a result, the first segment S1 does not need to slide relative to the first shell 110, which makes the setting of the first segment S1 more flexible.
[0139] For example, when the foldable device is in the unfolded state, the second segment S2 has a redundant structure, that is, the second segment S2 has a margin that can be stretched out. For example, when the foldable device is in the unfolded state, the second segment S2 has a pleated structure.
[0140] In some possible implementations, the first segment S1 is fixedly connected to the first housing 110.
[0141] In this way, the first segment S1 is less likely to develop wrinkles that affect the light and shadow of the flexible screen 200. In addition, the first segment S1 is less likely to generate noise due to sliding relative to the first housing 110. Furthermore, it is not necessary to provide a lubricating layer 330 and a wear-resistant layer 320 in the first segment S1, which helps to reduce the cost of the flexible heat-conducting sheet 300.
[0142] For example, the first segment S1 can be fixedly connected to the first housing 110 by means of adhesive bonding or other methods.
[0143] In some examples, the first segment S1 does not have a first lubricating layer 330a and a first wear-resistant layer 320a.
[0144] In some examples, the first segment S1 does not have a second lubricating layer 330b and a second wear-resistant layer 320b.
[0145] In some examples where the first segment S1 is fixedly connected to the first housing 110, the dimension of the first segment S1 is larger than the dimension of the second segment S2 in the extending direction of the first side L1. This allows for a larger heat exchange surface between the first segment S1 and the first housing 110, resulting in higher heat exchange efficiency between them. This is beneficial for further improving the temperature uniformity between the first housing 110 and the second housing 120, and for facilitating heat dissipation through the first housing 110.
[0146] In some possible implementations, the second rotating shaft mechanism 150 has a second channel located on the side of the second support structure away from the flexible screen 200, and the fourth segment S4 of the flexible heat-conducting sheet 300 passes through the second channel.
[0147] In this way, the wrinkles generated by the fourth segment S4 are less likely to affect the light and shadow of the flexible screen 200. The flexible heat-conducting sheet 300 is less likely to be pulled by forming a redundant structure in the fourth segment S4 when the foldable device is in the unfolded state. As a result, the fifth segment S5 does not need to slide relative to the third shell 130, which makes the setting of the fifth segment S5 more flexible.
[0148] For example, when the foldable device is in the unfolded state, the fourth segment S4 has a redundant structure, that is, the fourth segment S4 has a margin that can be stretched out. For example, when the foldable device is in the unfolded state, the fourth segment S4 has a pleated structure.
[0149] In some possible implementations, the fifth segment S5 is fixedly connected to the third housing 130.
[0150] In this way, the fifth segment S5 is less likely to produce wrinkles that affect the light and shadow of the flexible screen 200. In addition, the fifth segment S5 is less likely to generate noise due to sliding relative to the third housing 130. Furthermore, the lubrication layer 330 and the wear-resistant layer 320 can be eliminated from the fifth segment S5, which helps to reduce the cost of the flexible heat-conducting sheet 300.
[0151] For example, the fifth segment S5 can be fixedly connected to the third housing 130 by means of adhesive bonding or other methods.
[0152] In some examples, the fifth segment S5 does not include the first lubricating layer 330a and the first wear-resistant layer 320a.
[0153] In some examples, the fifth segment S5 does not have a second lubricating layer 330b and a second wear-resistant layer 320b.
[0154] In some examples where the fifth segment S5 is fixedly connected to the third housing 130, the size of the fifth segment S5 is larger than that of the fourth segment S4 in the extending direction of the second side L2. This allows for a larger heat exchange surface between the fifth segment S5 and the third housing 130, resulting in higher heat exchange efficiency. This further improves the temperature uniformity between the second housing 120 and the third housing 130, and facilitates heat dissipation through the third housing 130.
[0155] like Figure 3 As shown, in some examples, the second segment S2 is located between the first rotating shaft mechanism 140 and the flexible screen 200, the fourth segment S4 is located between the second rotating shaft mechanism 150 and the flexible screen 200, the first segment S1 can slide relative to the first housing 110, and the fifth segment S5 can slide relative to the third housing 130.
[0156] Figure 8This is a schematic diagram showing the cooperation between the flexible heat-conducting sheet and the shell assembly when the foldable device provided in this application is in the unfolded state.
[0157] In some examples, the second segment S2 passes through the first channel 143, the fourth segment S4 passes through the second channel, the first segment S1 is fixedly connected to the first housing 110, and the fifth segment S5 can slide relative to the third housing 130.
[0158] Figure 9 This is a schematic diagram showing the cooperation between the flexible heat-conducting sheet and the shell assembly when the foldable device provided in this application is in the unfolded state.
[0159] like Figure 9 As shown, in some examples, the second segment S2 passes through the first channel 143, the fourth segment S4 is located between the second rotating shaft mechanism 150 and the flexible screen 200, the first segment S1 is fixedly connected to the first housing 110, and the fifth segment S5 can slide relative to the third housing 130.
[0160] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.
[0161] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0162] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.
[0163] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.
[0164] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
Claims
1. A flexible thermal conductive sheet (300), characterized in that, Includes a first segment (S1), a second segment (S2), a third segment (S3), a fourth segment (S4), and a fifth segment (S5) arranged along the extension direction of the flexible heat-conducting sheet (300); The third segment (S3) includes a first side (L1) and a second side (L2), the first side (L1) and the second side (L2) are located on different sides of the third segment (S3), the first segment (S1) is connected to the first side (L1) through the second segment (S2), and the fifth segment (S5) is connected to the second side (L2) through the fourth segment (S4). In the extending direction of the first side (L1), the size of the third segment (S3) is larger than the size of the second segment (S2); In the extending direction of the second side (L2), the size of the third segment (S3) is larger than the size of the fourth segment (S4).
2. The flexible thermal conductive sheet (300) according to claim 1, characterized in that, Includes a multi-layer structure arranged along the thickness direction of the flexible heat-conducting sheet (300); The multilayer structure includes a thermally conductive main layer (310) and a wear-resistant layer (320). The heat-conducting main body layer (310) has the wear-resistant layer (320) on at least one side of the flexible heat-conducting sheet (300) in the thickness direction.
3. The flexible thermal conductive sheet (300) according to claim 2, characterized in that, The second segment (S2) and the fourth segment (S4) are provided with the wear-resistant layer (320).
4. The flexible thermal conductive sheet (300) according to claim 2, characterized in that, At least one of the first segment (S1) and the fifth segment (S5) is provided with the wear-resistant layer (320).
5. The flexible thermal conductive sheet (300) according to any one of claims 1-4, characterized in that, The flexible heat-conducting sheet (300) has a multilayer structure including a lubricating layer (330) located on the surface of the flexible heat-conducting sheet (300).
6. The flexible thermal conductive sheet (300) according to claim 5, characterized in that, The lubricating layer (330) is provided on both sides of the flexible heat-conducting sheet (300) in the thickness direction.
7. The flexible thermal conductive sheet (300) according to claim 5, characterized in that, The second segment (S2) and the fourth segment (S4) are provided with the lubricating layer (330).
8. The flexible thermal conductive sheet (300) according to claim 5, characterized in that, The lubricating layer (330) is provided on the surface of at least one of the first segment (S1) and the fifth segment (S5).
9. The flexible thermal conductive sheet (300) according to any one of claims 1-4, characterized in that, In the extending direction of the first side (L1), the size of the first segment (S1) is greater than or equal to the size of the second segment (S2); In the extending direction of the second side (L2), the size of the fifth segment (S5) is greater than or equal to the size of the fourth segment (S4).
10. A foldable device, characterized in that, It includes a housing assembly (100), a flexible screen (200), and a flexible heat-conducting sheet (300) as described in any one of claims 1-9. The housing assembly (100) includes a first housing (110), a second housing (120), a third housing (130), a first rotating shaft mechanism (140), and a second rotating shaft mechanism (150). One end of the second housing (120) is rotatably connected to the first housing (110) through the first rotating shaft mechanism (140), and the other end of the second housing (120) is rotatably connected to the third housing (130) through the second rotating shaft mechanism (150). The flexible screen (200) includes a first part (210) opposite to the first housing (110), a second part (220) opposite to the second housing (120), and a third part (230) opposite to the third housing (130). The first segment (S1) of the flexible heat-conducting sheet (300) is located between the first part (210) and the first housing (110). The third segment (S3) of the flexible heat-conducting sheet (300) is located between the second part (220) and the second housing (120) and is fixedly connected to the second housing (120). The fifth segment (S5) of the flexible heat-conducting sheet (300) is located between the third part (230) and the third housing (130). The first side (L1) of the flexible heat-conducting sheet (300) extends along the axial direction of the first rotating shaft mechanism (140). The second side (L2) of the flexible heat-conducting sheet (300) extends along the axial direction of the second rotating shaft mechanism (150).
11. The foldable device according to claim 10, characterized in that, The second segment (S2) of the flexible heat-conducting sheet (300) can slide relative to the first rotating shaft mechanism (140), and the fourth segment (S4) of the flexible heat-conducting sheet (300) can slide relative to the second rotating shaft mechanism (150).
12. The foldable device according to claim 10, characterized in that, Also includes the motherboard (400); The motherboard (400) is located on the second housing (120).
13. The foldable device according to any one of claims 10-12, characterized in that, The second segment (S2) of the flexible heat-conducting sheet (300) is located between the flexible screen (200) and the first rotating shaft mechanism (140).
14. The foldable device according to claim 13, characterized in that, The first segment (S1) is slidable relative to the first housing (110).
15. The foldable device according to any one of claims 10-12, characterized in that, The first rotating shaft mechanism (140) includes a first support structure (141) for supporting the flexible screen (200). The first rotating shaft mechanism (140) has a first channel (143), which is located on the side of the first support structure (141) away from the flexible screen (200), and the second segment (S2) of the flexible heat-conducting sheet (300) passes through the first channel (143).
16. The foldable device according to claim 15, characterized in that, The first segment (S1) is fixedly connected to the first housing (110).