Foldable device and display screen module

Abstract

The embodiment of the application provides a foldable device and a display screen module. The foldable device comprises a heat conduction sheet assembly arranged between a flexible screen and a shell assembly. The heat conduction sheet assembly comprises a flexible heat conduction sheet and an elastic member. The flexible heat conduction sheet comprises a fixed region, a bendable region and an extensible region. The fixed region corresponds to the shell one by one and is tightly connected with the corresponding shell. The bendable region corresponds to the pivot mechanism and is oppositely arranged with the corresponding pivot mechanism. The bendable region and the adjacent fixed region have the extensible region therebetween, and the bendable region and the adjacent fixed region are connected through the extensible region therebetween. The extensible region is correspondingly provided with the elastic member. One end of the elastic member is tightly connected with the adjacent fixed region, and the opposite end of the elastic member is tightly connected with the adjacent bendable region. According to the embodiment of the application, the heat on different shells can be transmitted through the heat conduction sheet assembly, and the temperature difference between the different shells can be reduced.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and in particular to a foldable device and a display module. Background Technology

[0002] With the development of technology in electronic devices such as smartphones and tablets, 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 address this, some electronic devices utilize flexible screens and are designed to be foldable.

[0003] In some related technologies, foldable devices include a flexible screen, a hinge mechanism, and two housings respectively installed on both sides of the hinge mechanism. The two housings are rotatably connected by the hinge mechanism so that the foldable device can switch between a folded state and a flattened state. The flexible screen is installed on the two housings and can be folded and flattened by the two housings. At least one housing can be equipped with a heat-generating unit such as a camera or a motherboard module. The heat generated by the heat-generating unit can be conducted to the housing on which it is located and dissipated to the external environment through the housing.

[0004] However, foldable devices in related technologies are prone to problems such as large temperature differences between different shells. Summary of the Invention

[0005] This application provides a foldable device and a display module. By setting a heat-conducting sheet assembly between the flexible screen assembled on the housing assembly and the housing assembly, which can cross the pivot mechanism to exchange heat with multiple housings, heat exchange can be carried out between different housings through the heat-conducting sheet assembly, thereby reducing the temperature difference between different housings.

[0006] This application provides a foldable device, including a housing assembly, a flexible screen, and a heat-conducting plate assembly. The flexible screen is disposed on the housing assembly, and the heat-conducting plate assembly is disposed between the flexible screen and the housing assembly. The housing assembly includes at least two housings and a pivot mechanism located between two adjacent housings, which are rotatably connected. The heat-conducting plate assembly includes a flexible heat-conducting plate and an elastic element. The flexible heat-conducting plate includes a fixed area, a bendable area, and a retractable area. The fixed areas correspond one-to-one with the housings and are fastened to the corresponding housings. The bendable areas correspond to the pivot mechanisms and are opposite to them. A retractable area exists between the bendable area and the adjacent fixed area, and the bendable area and the adjacent fixed area are connected through the retractable area. An elastic element is correspondingly provided in the retractable area. One end of the elastic element is fastened to the adjacent fixed area, and the other end of the elastic element is fastened to the adjacent bendable area. The retractable area has a contracted state and an expanded state, and the elastic element has an initial state and a stretched state. When the foldable device switches from a flattened state to a folded state, the retractable area switches from a contracted state to an unfolded state, causing the retractable area to extend towards the connected bendable area. The elastic element switches from its initial state to a stretched state, causing it to extend towards the connected bendable area. When the foldable device switches from a folded state to a flattened state, the retractable area switches from an unfolded state to a contracted state, causing the retractable area to shorten. The elastic element switches from its stretched state to its initial state, causing it to shorten.

[0007] In the foldable device of this application embodiment, the flexible heat-conducting sheet enables heat exchange between different shells. Heat from different shells can be transferred between them through the flexible heat-conducting sheet, resulting in a more uniform temperature across the shells and reducing temperature differences between them. The flexible heat-conducting sheet is firmly connected to the shell, allowing for rapid and uniform heat exchange between the flexible screen and the shell, resulting in stable heat transfer between the shell and the flexible screen. Even when the heat-generating unit within a shell generates a large amount of heat, the shell and its heat-generating unit are less likely to overheat. Furthermore, the heat generated by the heat-generating unit within the shell can be dissipated to the external environment through multiple shells, eliminating the need to increase the thickness of the heat-conducting sheet to improve the heat dissipation performance of the heat-generating unit and its shell, thus facilitating a thinner and lighter foldable device. Additionally, the extendable area can switch between folded and unfolded states as the foldable device transitions between folded and flattened states, controlling the location of wrinkles in the flexible heat-conducting sheet and reducing the risk of uncontrolled stretching or wrinkling of the flexible heat-conducting sheet.

[0008] In one possible implementation, when the foldable device is in a flattened state, there is a receiving space between the housing and the pivot mechanism, and the retractable area is at least partially located within the receiving space between the housing and the pivot mechanism corresponding to the fixed area to which it is connected.

[0009] In one possible implementation, the end of the housing facing the rotating shaft mechanism has a first inclined portion, and the end of the rotating shaft mechanism facing the housing has a second inclined portion. The housing and the rotating shaft mechanism form an accommodating space through the first and second inclined portions.

[0010] In one possible implementation, the rotating mechanism includes a main shaft and a rotatable door panel. The main shaft is located between two adjacent housings, which are rotatably connected by the main shaft. A rotatable door panel is provided between the main shaft and each housing, and the rotatable door panel is rotatably connected to the main shaft. The housing is driven by its adjacent rotatable door panel, so that the housing drives the rotatable door panel connected to it to rotate around the main shaft. The end of the rotatable door panel facing the adjacent housing has a second inclined surface.

[0011] In one possible implementation, the elastic element is a sheet-like elastic element.

[0012] In one possible implementation, the elastic element is fastened to the side of the flexible heat-conducting sheet facing the flexible screen.

[0013] In one possible implementation, the elastic member includes an elastically expandable portion and a first fixing portion and a second fixing portion respectively fastened to opposite ends of the elastically expandable portion. The elastically expandable portion is opposite to a corresponding expandable region, the first fixing portion is fastened to the fixing region, and the second fixing portion is fastened to the bendable region.

[0014] In one possible implementation, one end of the elastic member is bonded and fixed to an adjacent fixed area, and the opposite end of the elastic member is bonded and fixed to an adjacent bendable area.

[0015] In one possible implementation, the flexible thermally conductive sheet includes a graphite sheet, a first wrapping film, and a second wrapping film. The first wrapping film is adhered and fixed to the side of the graphite sheet facing the flexible screen, and the second wrapping film is adhered and fixed to the side of the graphite sheet away from the flexible screen. An elastic element is fastened to the first wrapping film. The housing is fastened to the second wrapping film, or the housing is fastened to the first wrapping film via the flexible screen.

[0016] In one possible implementation, the portion of the first wrapping film located in the fixed region is fastened to the elastic element to form a first connecting sub-region, and the portion of the first wrapping film located in the bendable region is fastened to the elastic element to form a second connecting sub-region. A first through-hole is formed in the portion of the graphite sheet located in the fixed region, and the axial projection of the first through-hole onto the first wrapping film is at least partially within the first connecting sub-region. The first and second wrapping films are bonded and fixed at the first through-hole. A second through-hole is formed in the portion of the graphite sheet located in the bendable region, and the axial projection of the second through-hole onto the first wrapping film is at least partially within the second connecting sub-region. The first and second wrapping films are bonded and fixed at the second through-hole.

[0017] In one possible implementation, the rotating shaft mechanism is provided with a connecting structure that is fastened to the flexible screen. The flexible heat-conducting sheet has a connecting hole that corresponds to the connecting structure. The connecting structure passes through the corresponding connecting hole and is fastened to the flexible screen. There is a gap between the connecting hole and the connecting structure inside, allowing the flexible heat-conducting sheet to move along the flexible screen.

[0018] In one possible implementation, at least a portion of the fixed region and the portion fastened to the elastic element are fastened to the corresponding housing.

[0019] In one possible implementation, the flexible screen includes a fixed display area corresponding to a housing, the fixed display area being fastened to the corresponding housing, and the side of the fixed area facing the flexible screen being fastened to the corresponding fixed display area, so that the fixed area is fastened to the corresponding housing.

[0020] In one possible implementation, the flexible screen includes a fixed display area corresponding to a housing, the fixed display area being fastened to the corresponding housing, and the side of the fixed area facing away from the flexible screen being fastened to the corresponding housing.

[0021] This application also provides a display module, including a flexible screen and a heat-conducting sheet assembly. The flexible screen includes at least two fixed display areas and a bendable display area located between two adjacent fixed display areas, with the two adjacent fixed display areas connected by the bendable display area. The heat-conducting sheet assembly includes a flexible heat-conducting sheet and an elastic element. The flexible heat-conducting sheet includes a fixed area, a bendable area, and a stretchable area. The fixed areas correspond one-to-one with the fixed display areas and are securely connected to their respective fixed display areas. The bendable areas correspond to and are opposite to the corresponding bendable display areas. A stretchable area exists between the bendable area and the adjacent fixed area, and the bendable area and the adjacent fixed area are connected by the stretchable area. An elastic element is correspondingly provided in the stretchable area. One end of the elastic element is securely connected to the adjacent fixed area, and the other end of the elastic element is securely connected to the adjacent bendable area. The stretchable area has a contracted state and an expanded state, and the elastic element has an initial state and a stretched state. When the bendable display area switches from a flat state to a bendable state, the telescopic area switches from a contracted state to an expanded state, causing the telescopic area to extend towards the connected bendable area. The elastic element switches from its initial state to a stretched state, causing it to extend towards the connected bendable area. When the bendable display area switches from a bendable state to a flat state, the telescopic area switches from an expanded state to a contracted state, causing it to shorten towards the connected fixed area. The elastic element switches from its stretched state to its initial state, causing it to shorten towards the connected fixed area.

[0022] In this embodiment of the application, the display module, after being assembled onto the housing assembly of a foldable device, allows for heat exchange between different housings via a flexible heat-conducting sheet. Heat from different housings can be transferred between them, resulting in a more uniform temperature across the housings and reducing temperature differences between them. The flexible heat-conducting sheet is securely connected to the housing, enabling rapid and uniform heat exchange between the flexible screen and the housing, resulting in stable heat transfer. Even when the heat-generating unit within a housing generates significant heat, the housing and its internal heat-generating unit are less prone to overheating. Furthermore, the heat generated by the heat-generating unit within the housing can be dissipated to the external environment through multiple housings, eliminating the need to increase the thickness of the heat-conducting sheet to improve the heat dissipation performance of the housing containing the heat-generating unit, thus contributing to a thinner and lighter foldable device. Additionally, the extendable area can switch between folded and unfolded states as the foldable device transitions between folded and flattened states, controlling the location of wrinkles in the flexible heat-conducting sheet and reducing the risk of uncontrolled stretching or wrinkling.

[0023] In one possible implementation, the elastic element is fastened to the side of the flexible heat-conducting sheet facing the flexible screen.

[0024] In one possible implementation, the elastic element is a sheet-like elastic element.

[0025] In one possible implementation, the elastic member includes an elastically expandable portion and a first fixing portion and a second fixing portion respectively fastened to opposite ends of the elastically expandable portion. The elastically expandable portion is opposite to a corresponding expandable region, the first fixing portion is fastened to the fixing region, and the second fixing portion is fastened to the bendable region.

[0026] In one possible implementation, one end of the elastic member is bonded and fixed to an adjacent fixed area, and the opposite end of the elastic member is bonded and fixed to an adjacent bendable area.

[0027] In one possible implementation, the flexible thermally conductive sheet includes a graphite sheet, a first wrapping film, and a second wrapping film. The first wrapping film is adhered and fixed to the side of the graphite sheet facing the flexible screen, and the second wrapping film is adhered and fixed to the side of the graphite sheet away from the flexible screen. An elastic element is securely connected to the first wrapping film. A fixed display area is securely connected to the first wrapping film.

[0028] In one possible implementation, the portion of the first wrapping film located in the fixed region is fastened to the elastic element to form a first connecting sub-region, and the portion of the first wrapping film located in the bendable region is fastened to the elastic element to form a second connecting sub-region. A first through-hole is formed in the portion of the graphite sheet located in the fixed region, and the axial projection of the first through-hole onto the first wrapping film is at least partially within the first connecting sub-region. The first and second wrapping films are bonded and fixed at the first through-hole. A second through-hole is formed in the portion of the graphite sheet located in the bendable region, and the axial projection of the second through-hole onto the first wrapping film is at least partially within the second connecting sub-region. The first and second wrapping films are bonded and fixed at the second through-hole.

[0029] In one possible implementation, the bendable area has a connecting hole.

[0030] In one possible implementation, at least a portion of the fixed area and the portion fastened to the elastic element are fastened to the corresponding fixed display area. Attached Figure Description

[0031] Figure 1 A schematic diagram showing a foldable device in a folded state, as provided in an embodiment of this application;

[0032] Figure 2 A schematic diagram from another perspective of a foldable device in a folded state, provided as an embodiment of this application;

[0033] Figure 3 A schematic diagram showing a foldable device in a flattened state, as provided in an embodiment of this application;

[0034] Figure 4 A schematic diagram from another perspective of a foldable device provided in the embodiments of this application when it is in a flattened state;

[0035] Figure 5 for Figure 3 A schematic diagram of the cross-section at point bb;

[0036] Figure 6 An exploded view of a heat-conducting sheet assembly of another foldable device provided in an embodiment of this application, when the foldable device is in a flattened state;

[0037] Figure 7 An assembly diagram of the housing assembly and heat-conducting sheet assembly of another foldable device provided in an embodiment of this application;

[0038] Figure 8 for Figure 2 A schematic diagram of the section near the rotating shaft mechanism at point aa;

[0039] Figure 9 for Figure 5 Enlarged view of section A in the middle;

[0040] Figure 10 for Figure 8 Enlarged view of section B;

[0041] Figure 11 A schematic diagram of a flexible heat-conducting sheet for another foldable device provided in this application embodiment, viewed from one angle when the foldable device is in a flattened state;

[0042] Figure 12 This is an assembly diagram of the heat-conducting sheet assembly, the rotating shaft mechanism, and the flexible screen when the foldable device provided in this application is in a folded state.

[0043] Figure 13 A schematic diagram of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a flattened state;

[0044] Figure 14 A schematic diagram from another perspective of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a flattened state;

[0045] Figure 15 A schematic diagram from one perspective of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a folded state;

[0046] Figure 16 A schematic diagram from another perspective of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a folded state;

[0047] Figure 17 A schematic diagram of a cross-section of a heat-conducting sheet assembly of a foldable device provided in an embodiment of this application, where an elastic element is provided when the foldable device is in a flattened state;

[0048] Figure 18 This is a schematic diagram of a graphite sheet of another foldable device provided in an embodiment of this application, viewed from the perspective of the foldable device in a flattened state.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100. Housing assembly;

[0051] 110. Housing; 111. Middle frame; 112. Rear cover; 113. First beveled section; 114. Mounting plate;

[0052] 120. Rotating shaft mechanism; 121. Main shaft; 122. Rotatable door panel; 123. Second inclined section; 124. Connecting structure;

[0053] 200. Flexible screen;

[0054] 210. Fixed display area;

[0055] 220. Bendable display area; 221. First bendable sub-area; 222. Door panel support sub-area; 223. Second bendable sub-area;

[0056] 300. Thermal conductive sheet assembly;

[0057] 310. Flexible heat-conducting sheet; 311. Fixed area; 3111. First connecting sub-area; 312. Bendable area; 3121. Second connecting sub-area; 313. Extendable area; 314. Connecting hole; 315. Graphite sheet; 316. First wrapping film; 317. Second wrapping film; 318. First through hole; 319. Second through hole;

[0058] 320. Elastic element; 321. First fixing piece; 322. Second fixing piece; 323. Elastic telescopic part; 324. Adhesive backing;

[0059] 400. Capacity space. Detailed Implementation

[0060] 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.

[0061] This application provides a foldable device that can change its form by folding and unfolding to meet the needs of users in different scenarios. For example, it can be folded to reduce the size of the foldable device when carried; and it can be unfolded to increase the size of the screen used for display or operation when in use. It is understood that the foldable device can also be called user equipment (UE) or terminal, etc.

[0062] The foldable devices provided in this application can include, but are not limited to, portable Android devices (PADs), 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, etc. This application example uses a handheld device with wireless communication capabilities, such as a mobile phone, for illustration.

[0063] Figure 1 This is a schematic diagram showing one perspective of a foldable device in a folded state, as provided in an embodiment of this application. Figure 2 This is a schematic diagram from another perspective of a foldable device in a folded state, provided as an embodiment of this application.

[0064] like Figure 1 , Figure 2 As shown, the foldable device provided in this application embodiment includes a housing assembly 100, which includes at least two housings 110 and a pivot mechanism 120 located between two adjacent housings 110. The two adjacent housings 110 are rotatably connected by the pivot mechanism 120 between them, so that the foldable device can switch between a flattened state and a folded state.

[0065] It is understood that the axial direction of the pivot mechanism 120 can extend along the width direction of the foldable device. The pivot mechanism 120 may include a main shaft 121 (as described below). Figure 8As shown in the diagram, the main shaft 121 is located between two adjacent housings 110, which are rotatably connected by the main shaft 121. The axial direction of the main shaft 121 can extend along the width direction of the foldable device. The rotating shaft mechanism 120 may also include a rotating assembly, which is rotatably connected to the main shaft 121. The housings 110 may be fastened to the rotating assembly by welding, fastener connection, or other means, so that the housings 110 are rotatably connected to the main shaft 121.

[0066] When the two housings 110 located on both sides of the rotating shaft mechanism 120 rotate to overlap each other, the foldable device is in a folded state. At this time, the two housings 110 located on both sides of the rotating shaft mechanism 120 can be parallel to each other. Those skilled in the art will understand that when the foldable device is in a folded state, due to design tolerances and other reasons, the parallelism between the two structural components may not be absolute, and slight deviations are allowed.

[0067] Figure 3 This is a schematic diagram showing one perspective of a foldable device in a flattened state, as provided in an embodiment of this application. Figure 4 This is a schematic diagram from another perspective of a foldable device provided in the embodiments of this application when it is in a flattened state.

[0068] like Figure 3 , Figure 4 As shown, when the two housings 110 located on both sides of the rotating shaft mechanism 120 rotate relative to each other until the included angle between them is approximately 180°, the foldable device is in a flattened state. Those skilled in the art will understand that the included angle between the two structural components referred to in this application is approximately 180°, but due to design tolerances and other reasons, it may not be an absolute 180°, and slight deviations are allowed, such as 165°, 177°, or 185°.

[0069] Of course, foldable devices also have an intermediate state during the switching process between the folded and flattened states.

[0070] It should be noted that the housing assembly 100 may include two housings 110, or three, four or more housings 110, with adjacent housings 110 rotatably connected by a pivot mechanism 120. Correspondingly, the foldable device can be folded into two, three, four or more layers.

[0071] For example, the housing assembly 100 may include a pivot mechanism 120 and two housings 110, which are respectively disposed on both sides of the pivot mechanism 120. The two housings 110 can rotate towards each other to be stacked and rotate away from each other to be on the same plane (allowing for slight deviation). At this time, the foldable device can be folded into two layers.

[0072] For example, the foldable device may include three housings 110 arranged side by side, with a pivot mechanism 120 between adjacent housings 110, allowing the adjacent housings 110 to be rotatably connected via the pivot mechanism 120. We may refer to the three housings 110 as the first housing, the second housing, and the third housing, respectively. The first and second housings are rotatably connected via the pivot mechanism 120, and the second and third housings are also rotatably connected via the pivot mechanism 120. The first and second housings can rotate towards each other to form a stack, and the third housing and the second housing can also rotate towards each other to form a stack. The first, second, and third housings can be folded into three layers, or the first and third housings can both be folded onto the same surface of the second housing, forming a single layer and a two-layer structure with the second housing. The first and third housings can also rotate away from the second housing to be coplanar with it (allowing for slight deviation), thus switching the foldable device to a flattened state.

[0073] like Figure 4 As shown, exemplarily, the housing 110 may include a middle frame 111 and a rear cover 112. The rear cover 112 is fastened to one side of the middle frame 111 in the thickness direction. The middle frame 111 is mounted on a rotating shaft mechanism 120, and the middle frames 111 located on both sides of the rotating shaft mechanism 120 are rotatably connected through the rotating shaft mechanism 120. Specifically, the middle frame 111 may be fastened to the rotating component of the rotating shaft mechanism 120, and the middle frame 111 may be rotatably connected to the main shaft 121 of the rotating shaft mechanism 120 through the rotating component of the rotating shaft mechanism 120. When the foldable device is in a flattened state, the included angle of the middle frames 111 on both sides of the pivot mechanism 120 is approximately 180° (a slight deviation is allowed, such as 165°, 177° or 185°), and the included angle of the rear covers 112 on both sides of the pivot mechanism 120 is approximately 180° (a slight deviation is allowed, such as 165°, 177° or 185°). When the foldable device is in a folded state, the middle frames 111 on both sides of the pivot mechanism 120 can be parallel to each other (a slight deviation is allowed), and the rear covers 112 on both sides of the pivot mechanism 120 can be parallel to each other (a slight deviation is allowed), and the middle frames 111 on both sides of the pivot mechanism 120 are sandwiched between the rear covers 112 that are fastened together.

[0074] like Figure 3 , Figure 4 As shown, the foldable device provided in this application embodiment may further include a display module, which may include a flexible screen 200, which is disposed on the housing assembly 100.

[0075] It is understood that the flexible screen 200 is installed on the same side of all the housings 110 and all the pivot mechanisms 120. The part of the flexible screen 200 that is opposite to each housing 110 can be fastened to the opposite housing 110. The pivot mechanism 120 can be used to support the flexible screen 200.

[0076] In the example of the housing 110, the middle frame 111 and the back cover 112, one side of the middle frame 111 is used to fasten to the back cover 112, and the other side is used to fasten to the opposite part of the flexible screen 200.

[0077] The flexible screen 200 can be used for image display or as a virtual keyboard for inputting information. The function of the flexible screen 200 can be determined according to the specific application scenario.

[0078] For example, the flexible screen 200 can be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) 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.

[0079] In this embodiment, the flexible screen 200 includes at least two fixed display areas 210 and a bendable display area 220 located between two adjacent fixed display areas 210. Each fixed display area 210 corresponds to a housing 110, and the fixed display area 210 is opposite to and securely connected to the corresponding housing 110. The bendable display area 220 corresponds to a pivot mechanism 120, and two adjacent fixed display areas 210 are connected through the bendable display area 220 between them.

[0080] It is understood that the bendable display area 220 can be connected to the corresponding fixed display areas 210 on both sides of the flexible screen 200 along its length. The length direction of the flexible screen 200 refers to the direction perpendicular to the axis of the pivot mechanism 120 after the flexible screen 200 is assembled onto the housing assembly 100, and the width direction of the flexible screen 200 is the direction parallel to the axis of the pivot mechanism 120 after the flexible screen 200 is assembled onto the housing assembly 100.

[0081] It should be noted that when the foldable device switches from a flat state to a folded state, the fixed display area 210 rotates with the housing 110 to which it is securely connected, and the bendable display area 220 bends under the influence of the fixed display area 210, thus switching the bendable display area 220 from a flat state to a bendable state. When the foldable device switches from a folded state to a flat state, the fixed display area 210 rotates with the housing 110 to which it is securely connected, and the bendable display area 220 flattens under the influence of the fixed display area 210, thus switching the bendable display area 220 from a bendable state to a flat state. When the bendable display area 220 is in the bendable state, the fixed display areas 210 connected to its two sides can be parallel to each other (a slight deviation is allowed), and the bendable display area 220 can have a teardrop-shaped structure. When the bendable display area 220 is in the flat state, the bendable display area 220 can be coplanar with the fixed display areas 210 connected to its two sides (a slight deviation is allowed).

[0082] For example, the fixed display area 210 can be fastened to the corresponding housing 110 by means of adhesive bonding, clamping, etc.

[0083] In an example where the housing 110 includes a middle frame 111 and a back cover 112, the fixed display area 210 can be fixed to the middle frame 111 of the corresponding housing 110 by adhesive bonding.

[0084] At least one housing 110 of the foldable device provided in this application embodiment is provided with a heating unit (not shown).

[0085] It is understandable that the heating unit can be installed in only one housing 110 or in multiple housings 110.

[0086] In the example where the housing 110 includes a middle frame 111 and a rear cover 112, the heating unit inside the housing 110 can be disposed in the space formed by the middle frame 111 and the rear cover 112. The heating unit can be disposed on a circuit board. The circuit board with the heating unit inside the housing 110 can be installed in the receiving cavity of the middle frame 111. The heating unit can exchange heat with the middle frame 111 and the rear cover 112 of the housing 110.

[0087] It should be noted that the heating unit is a component that generates heat or a module composed of multiple components. For example, the heating unit can be a chip such as a central processing unit (CPU) or a graphics processing unit (GPU), or it can be a power supply, resistor, camera, or a motherboard module integrating multiple components. Each housing 110 can contain one or more heating units, and multiple heating units of different types can be placed in the same housing 110.

[0088] When components are housed within multiple housings 110, the components housed in different housings 110 can be electrically connected via a flexible circuit board (not shown) passing through a pivot mechanism 120. The flexible circuit board can pass through the pivot mechanism 120 and extend to the multiple housings 110 containing the electrically connected components. In an example where the housing 110 includes a middle frame 111 and a back cover 112, the portion of the flexible circuit board located within the housing 110 can be positioned on the side of the middle frame 111 facing away from the flexible screen 200. In other words, the middle frame 111 can be located between the flexible screen 200 and the flexible circuit board.

[0089] In some foldable devices in related technologies, the heat generated by the heating unit can be conducted to its housing, and then dissipated to the external environment through the housing. In some foldable devices with heat-conducting plates inside the housing, each housing has an independent heat-conducting plate, and each heat-conducting plate does not extend through or across the pivot into another housing. In these foldable devices, the heat conduction capacity between different housings is limited, and the heat generated by the heating unit in each housing is dissipated through that housing. Because the type and number of heating units in different housings may differ, or some housings may not have heating units, the heat on each housing may vary, leading to significant temperature differences between the housings in these foldable devices. Furthermore, when the heat generated by a heating unit in a particular housing is high, that housing and its heating unit may experience insufficient heat dissipation, potentially causing overheating. For example, a motherboard module generates a large amount of heat during operation, and if the motherboard module cannot effectively dissipate heat through multiple housings, the housing containing the motherboard module and the motherboard module itself are prone to overheating.

[0090] Figure 5 for Figure 3 A schematic diagram of the cross-section at point bb.

[0091] like Figure 5As shown, based on this, the foldable device provided in this application embodiment also includes a heat-conducting sheet assembly 300, which is disposed between the flexible screen 200 and the housing assembly 100.

[0092] It should be noted that the display module may include a heat-conducting sheet assembly 300. The heat-conducting sheet assembly 300 can be assembled onto the flexible screen 200 to form the display module, and then assembled together with the flexible screen 200 onto the housing assembly 100. The heat-conducting sheet assembly 300 and the display module may also be two independent components, and the heat-conducting sheet assembly 300 and the flexible screen 200 can be assembled onto the housing assembly 100 respectively according to a certain installation sequence.

[0093] Understandably, the heat-conducting plate assembly 300 can extend along the flexible screen 200, and there is a space between the flexible screen 200 and the housing assembly 100 for installing the heat-conducting plate assembly 300.

[0094] In the example where the housing 110 includes a middle frame 111 and a back cover 112, the portion of the heat-conducting sheet assembly 300 opposite to the housing 110 is located between the middle frame 111 of the housing 110 and the fixed display area 210 corresponding to the flexible screen 200, and the portion of the heat-conducting sheet assembly 300 opposite to the pivot mechanism 120 is located between the pivot mechanism 120 and the bendable display area 220 corresponding to the flexible screen 200.

[0095] Figure 6 An exploded view of a heat-conducting sheet assembly of another foldable device provided in this application embodiment when the foldable device is in a flattened state. Figure 7 This is an assembly diagram of the housing assembly and heat-conducting sheet assembly of another foldable device provided in an embodiment of this application.

[0096] like Figure 6 , Figure 7 As shown in the embodiments of this application, the heat-conducting sheet assembly 300 includes a flexible heat-conducting sheet 310. The flexible heat-conducting sheet 310 includes a fixed region 311 and a bendable region 312.

[0097] It is understandable that the fixed area 311 and the bendable area 312 are different areas of the same flexible heat-conducting sheet 310, which can extend along the flexible screen 200.

[0098] The flexible heat-conducting sheet 310 is a heat-conducting sheet with bendable characteristics, and may include, but is not limited to, flexible graphite sheets, flexible thermally conductive silicone sheets, flexible composite material sheets, flexible heat spreaders, etc.

[0099] In the embodiments of this application, the fixed area 311 can correspond one-to-one with the housing 110 and be fastened to the corresponding housing 110. Each fixed area 311 can be used to exchange heat with the corresponding housing 110. The bendable area 312 can correspond to the rotating shaft mechanism 120 and be arranged opposite to the corresponding rotating shaft mechanism 120.

[0100] In this way, the flexible heat-conducting sheet 310 allows for heat exchange between different housings 110. Heat on different housings 110 can be transferred between them through the flexible heat-conducting sheet 310, resulting in a more uniform temperature across each housing 110 and reducing temperature differences between them. The flexible heat-conducting sheet 310 is firmly connected to the housing 110, allowing for rapid and uniform heat exchange between the flexible screen 200 and the housing 110. The heat transfer between the housing 110 and the flexible screen 200 is relatively stable. Even when the heat-generating unit within a housing 110 generates a large amount of heat, that housing 110 and its heat-generating unit are less likely to overheat. Furthermore, the heat generated by the heat-generating unit within the housing 110 can be dissipated to the external environment through multiple housings 110, eliminating the need to increase the thickness of the heat-conducting sheet to improve the heat dissipation performance of the housing 110 containing the heat-generating unit, thus facilitating a thinner and lighter foldable device.

[0101] It is understood that the fixed area 311 and the corresponding fixed display area 210 can be securely connected to the corresponding housing 110 respectively. The fixed area 311 can also be securely connected to the corresponding fixed display area 210, and the corresponding fixed display area 210 is securely connected to the corresponding housing 110.

[0102] In the example where the display module includes a heat-conducting sheet assembly 300, the fixed area 311 can correspond one-to-one with the fixed display area 210 and be securely connected to the corresponding fixed display area 210, and the bendable area 312 can correspond to the bendable display area 220 and be positioned opposite to the corresponding bendable display area 220. After the display module is assembled onto the housing assembly 100, the fixed area 311 can be securely connected to the corresponding housing through the fixed display area 210, and each fixed area 311 can be used for heat exchange with the corresponding housing 110.

[0103] Heat exchange can occur between different housings 110 via flexible heat-conducting plates 310 that are fastened to them.

[0104] It is understandable that the fixed area 311 can be fastened to the corresponding housing 110 or the corresponding fixed display area 210 by means of adhesive bonding, fastener connection, etc.

[0105] For example, the two ends of the elastic element 320 can be bonded and fixed to the fixed area 311 and the bendable area 312 respectively by adhesive 324.

[0106] It should be noted that the housing 110 can be in contact with or spaced from the corresponding fixed area 311, so that the housing 110 can exchange heat with the corresponding fixed area 311. The heating unit disposed within the housing 110 can be in contact with or spaced from the corresponding fixed area 311, so as to exchange heat with the corresponding fixed area 311. The heating unit can exchange heat with its housing 110 and with other housings 110 through the flexible heat-conducting plate 310. The heating unit can also exchange heat with the flexible heat-conducting plate 310 through its housing 110.

[0107] There is a space between the housing 110 and the fixed display area 210 for installing the corresponding fixed area 311, and there is a space between the rotating mechanism 120 and the bendable display area 220 for installing the corresponding bendable area 312.

[0108] In the example where the housing 110 includes a middle frame 111 and a back cover 112, the middle frame 111 can be spaced apart from the fixed display area 210 on the side facing the corresponding fixed display area 210. A space for installing the corresponding fixed area 311 is formed between the middle frame 111 and the corresponding fixed display area 210. The fixed display area 210 can be connected to the corresponding middle frame 111 through a connecting frame, adhesive strip, or other structures. Alternatively, a stepped structure can be provided on the middle frame 111 on the side facing the corresponding fixed display area 210, and the fixed display area 210 can be installed on the stepped structure of the corresponding middle frame 111.

[0109] When a flexible circuit board is provided on the side of the middle frame 111 away from the flexible screen 200, the middle frame 111 can be located between the flexible circuit board and the flexible heat-conducting sheet 310.

[0110] In some examples, the housing 110 may further include a mounting plate 114 disposed on the side of the middle frame 111 facing the corresponding fixed display area 210. The mounting plate 114 is fastened to the middle frame 111, and the fixed display area 210 is mounted on the mounting plate 114 of the corresponding housing 110. The mounting plate 114 and the corresponding fixed display area 210 are spaced apart. The fixed area 311 is fastened to the mounting plate 114 of the corresponding housing 110. The mounting plate 114 and the middle frame 111 of the housing 110 can exchange heat, and the mounting plate 114 can exchange heat with the fixed area 311 fastened to it. This facilitates the fastening of the flexible heat-conducting sheet 310 to the housing 110, allows the fixed area 311 to be fastened to the corresponding mounting plate 114 relatively flat, and reduces the pulling force on the flexible heat-conducting sheet 310.

[0111] It is understood that the heating unit inside the housing 110 can be arranged in the space formed by the mounting plate 114, the middle frame 111 and the rear cover 112, and the heating unit inside the housing 110 can exchange heat with the flexible heat-conducting sheet 310 through the middle frame 111 and the mounting plate 114.

[0112] In embodiments of this application, the flexible heat-conducting sheet 310 further includes a stretchable region 313. The bendable region 312 and the adjacent fixed region 311 are connected by the stretchable region 313 between them.

[0113] It is understandable that the fixed area 311, the bendable area 312, and the stretchable area 313 are different areas of the same flexible heat-conducting sheet 310.

[0114] The bendable region 312 can be connected to the corresponding fixed regions 311 on both sides of the length direction of the flexible heat-conducting sheet 310. The length direction of the flexible heat-conducting sheet 310 refers to the direction perpendicular to the axis of the rotating shaft mechanism 120 after the flexible heat-conducting sheet 310 is assembled onto the housing assembly 100, and the width direction of the flexible heat-conducting sheet 310 is the direction parallel to the axis of the rotating shaft mechanism 120 after the flexible heat-conducting sheet 310 is assembled onto the housing assembly 100.

[0115] It should be noted that the stretchable region 313 has a contracted state and an expanded state. When the stretchable region 313 is in the contracted state, it can be wrinkled, for example, it can be wavy with crests and troughs facing the thickness direction of the flexible heat-conducting sheet 310. When the stretchable region 313 switches from the contracted state to the expanded state, the wrinkles are stretched and become shallower or flattened, and the distance between the end of the stretchable region 313 connected to the fixed region 311 and the end connected to the bendable region 312 increases. For example, both sides of the stretchable region 311 in the thickness direction of the flexible heat-conducting sheet 310 can be stretched into a smooth plane or arc surface (a slight deviation is allowed). It is understood that the length of the stretchable region 313 in the length direction of the flexible heat-conducting sheet 310 when it is in the contracted state is less than the length of the stretchable region 313 in the length direction of the flexible heat-conducting sheet 310 when it is in the expanded state.

[0116] In this way, the retractable region 313, which can switch between a retracted state and an unfolded state, allows the fixed region 311 and the bendable region 312 connected to the retractable region 313 to move relative to each other along the length of the flexible heat-conducting sheet 310. When the foldable device switches from a flattened state to a folded state, and the bendable display area 220 switches to a bendable state, the bendable region 312 connected to the corresponding retractable region 313 can move along the length of the flexible heat-conducting sheet 310 away from the fixed region 311 connected to the retractable region 313, which helps to reduce the risk of the flexible heat-conducting sheet 310 being damaged by being stretched.

[0117] In some examples, when the stretchable region 313 is in a contracted state, the stretchable region 313 protrudes from the fixed region 311 and the bendable region 312 connected to the flexible heat-conducting sheet 310 on one side of the sheet in the thickness direction, while the stretchable region 313 does not protrude from the fixed region 311 and the bendable region 312 connected to the flexible heat-conducting sheet 310 on the other side of the sheet in the thickness direction.

[0118] This allows for the provision of a space on one side of the flexible heat-conducting sheet 310 in the thickness direction to accommodate the folds of the expandable area, thereby reducing the complexity of the foldable device structure.

[0119] In the embodiments of this application, such as Figure 6 , Figure 7 As shown, the heat-conducting sheet assembly 300 also includes an elastic element 320. The stretchable region 313 is provided with an elastic element 320, one end of the elastic element 320 is fastened to the adjacent fixed region 311, and the other end of the elastic element 320 is fastened to the adjacent bendable region 312.

[0120] It should be noted that the elastic element 320 has an initial state and a stretched state. When the elastic element 320 switches from the initial state to the stretched state, the distance between the end of the elastic element 320 connected to the fixed area 311 and the end connected to the bendable area 312 increases, and the elastic element 320 generates an elastic restoring force on the fixed area 311 and the bendable area 312 it connects to. When the foldable device switches from the folded state to the flattened state, the fixed area 311 and the bendable area 312 connected to the elastic element 320 can move closer together under the action of the elastic restoring force of the elastic element 320. When the elastic element 320 switches from the stretched state to the initial state, the distance between the end of the elastic element 320 connected to the fixed area 311 and the end connected to the bendable area 312 decreases, which eliminates the elastic restoring force generated by the elastic element 320 on the fixed area 311 and the bendable area 312 it connects to. It is understandable that the length of the elastic element 320 in the length direction of the flexible heat-conducting sheet 310 when it is in the initial state is less than the length of the elastic element 320 in the length direction of the flexible heat-conducting sheet 310 when it is in the stretched state.

[0121] In this way, when the foldable device switches from a folded state to a flat state, and the bendable display area 220 switches to a flat state, the elastic member 320 can pull the bendable area 312 connected to it back to a position close to the fixed area 311 connected to the elastic member 320, so that the stretchable area 313 switches to a contracted state. This helps to control the position of the flexible heat-conducting sheet 310 wrinkling, and can reduce the risk that the wrinkling of the flexible heat-conducting sheet 310 will be uncontrolled and affect the display of the flexible screen 200.

[0122] Figure 8 for Figure 2 A schematic diagram of the section near the rotating shaft mechanism 120 at point aa. Figure 9 for Figure 5 Enlarged view of part A in the middle. Figure 10 for Figure 8 Enlarged view of section B in the middle.

[0123] like Figures 8-10 As shown, when the foldable device switches from a flattened state to a folded state, the retractable region 313 switches from a contracted state to an unfolded state, causing the retractable region 313 to lengthen, and the elastic element 320 switches from an initial state to a stretched state, causing the elastic element 320 to lengthen. That is, when the foldable device switches from a flattened state to a folded state, the projected lengths of the retractable region 313 and the elastic element 320 on the surface of the flexible screen 200 increase. When the foldable device switches from a folded state to a flattened state, the retractable region 313 switches from an unfolded state to a contracted state, causing the retractable region 313 to shorten, and the elastic element 320 switches from a stretched state to its initial state, causing the elastic element 320 to shorten. That is, when the foldable device switches from a folded state to a flattened state, the projected lengths of the retractable region 313 and the elastic element 320 on the surface of the flexible screen 200 decrease.

[0124] Understandably, in the example where the display module includes the heat-conducting sheet assembly 300, when the bendable display area 220 switches from a flat state to a bendable state, the telescopic area 313 switches from a contracted state to an unfolded state, causing the telescopic area 313 to extend towards the connected bendable area 312, and the elastic member 320 switches from an initial state to a stretched state, causing the elastic member 320 to extend towards the connected bendable area 312. When the bendable display area 220 switches from a bendable state to a flat state, the telescopic area 313 switches from an unfolded state to a contracted state, causing the telescopic area 313 to shorten towards the connected fixed area 311, and the elastic member 320 switches from a stretched state to its initial state, causing the elastic member 320 to shorten towards the connected fixed area 311. After the display module is assembled onto the housing assembly 100, the bendable display area 220 can switch between a bendable state and a flat state as the foldable device switches between a folded state and a flat state.

[0125] Thus, when the foldable device switches from a flattened state to a folded state, the retractable area 313 can be pulled by the fixed area 311 and the foldable area 312 connected to it to switch to an unfolded state. The elastic member 320 is pulled by the fixed area 311 and the foldable area 312 connected to the retractable area 313 at its location to switch to a stretched state. The elastic member 320 in the stretched state generates an elastic restoring force that pulls the foldable area 312 connected to the retractable area 313 at its location back along the length direction of the flexible heat-conducting sheet 310 to the fixed area 311 connected to the retractable area 313 at its location. When the foldable device switches from a folded state to a flattened state, the elastic member 320 pulls the foldable area 312 connected to the retractable area 313 at its location back to a position close to the fixed area 311 connected to the retractable area 313 at its location, causing the retractable area 313 at the location of the elastic member 320 to switch to a contracted state. The position of the wrinkles in the flexible heat-conducting sheet 310 when the foldable device switches from a folded state to a flat state is controllable, which can reduce the risk of the flexible heat-conducting sheet 310 being stretched or wrinkled uncontrollably, and help to reduce the impact on the display of the flexible screen 200.

[0126] It should be noted that when the foldable device switches from a flat state to a folded state, the fixed area 311 of the flexible heat-conducting sheet 310 and the fixed display area 210 of the flexible screen 200 rotate with the housing 110 that is fastened to them. The bendable display area 220 of the flexible screen 200 switches to a bendable state and arches towards the pivot mechanism 120. The arched bendable display area 220 pushes up the bendable area 312 of the flexible heat-conducting sheet 310 and applies a force towards the pivot mechanism 120 to the corresponding bendable area 312. The bendable area 312 bends and moves away from its adjacent fixed area 311, pulling the retractable area 313 from a contracted state to an unfolded state and pulling the elastic element 320 into a stretched state. When the foldable device switches from a folded state to a flattened state, the fixed area 311 of the flexible heat-conducting sheet 310 and the fixed display area 210 of the flexible screen 200 rotate with the housing 110 that is fastened to them. The bendable display area 220 of the flexible screen 200 gradually switches to a flat state, and the corresponding bendable area 312 also gradually flattens. Under the action of its own elastic restoring force, the elastic element 320 gradually switches to its initial state and drives the bendable area 312 connected to the elastic element 320 to move towards the fixed area 311 connected to the elastic element 320. Under the action of the elastic restoring force of the corresponding elastic element 320, the retractable area 313 switches from an unfolded state to a contracted state.

[0127] In some examples, the rotating component of the rotating shaft mechanism 120 includes a rotatable door plate 122. The main shaft 121 and the housing 110 are both provided with rotatable door plates 122. The rotatable door plates 122 are rotatably connected to the main shaft 121. The housing 110 is drivenly connected to its adjacent rotatable door plate 122 so that the housing 110 drives the rotatable door plate 122 connected to it to rotate.

[0128] Understandably, the rotatable door panel 122 can be used to support the bendable display area 220 to limit the shape of the bendable display area 220 when the foldable device switches from a flat state to a folded state. Exemplarily, the housing 110 can be slidably connected to the adjacent rotatable door panel 122 via a track groove.

[0129] It should be noted that the rotating assembly may also include a connecting frame (not shown), which is rotatably connected to the main shaft 121. The housing 110 may be fastened to the connecting frame by welding, fastener connection or other means, so that the housing 110 is rotatably connected to the main shaft 121.

[0130] Specifically, the bendable display area 220 may include a first bendable sub-area 221, a door panel support sub-area 222, and a second bendable area 223. The door panel support sub-area 222 corresponds one-to-one with the rotatable door panel 122 and can be used to abut against the rotatable door panel 122. Each fixed display area 210 has a first bendable area 221 between it and the door panel support sub-area 222, and each fixed display area 210 is connected to the door panel support sub-area 222 through the first bendable area 221. Each adjacent door panel support sub-area 222 has a second bendable area 223, and adjacent door panel support sub-areas 222 are connected through the second bendable area 223. When the foldable device switches from a flattened state to a folded state, the rotatable door panel 122 rotates relative to the main shaft 121 under the drive of the corresponding housing 110. The first bendable sub-region 221 and the second bendable sub-region 223 bend under the drive of the rotating fixed display area 210. When the foldable device switches to the folded state and the bendable display area 220 switches to the bendable state, the rotatable door panel 122 can support the corresponding door panel support sub-region 222 to limit the shape of the bendable display area 220 when it is in the bendable state. After the foldable device switches to the folded state, the door panel support sub-region 222 does not bend.

[0131] In some examples, the door panel support sub-region 222 can be securely connected to the corresponding rotatable door panel 122. In this case, during the switching between the folded and flattened states of the foldable device, the rotatable door panel 122 can support the corresponding door panel support sub-region 222, and the door panel support sub-region 222 can remain unbent during the switching between the folded and flattened states. In this way, the shape change of the bendable display area 220 can be made more stable and controllable during the switching between the folded and flattened states of the foldable device.

[0132] In the embodiments of this application, when the foldable device is in a flattened state, there is a receiving space 400 between the housing 110 and the pivot mechanism 120, and the retractable region 313 is at least partially located within the receiving space 400 between the housing 110 and the pivot mechanism 120 corresponding to the fixed region 311 to which it is connected.

[0133] This reduces the impact of the stretchable area 313 on the flexible screen 200 display.

[0134] It is understandable that when the stretchable region 313 is in a contracted state, the folds of the stretchable region 313 protrude away from the flexible screen 200 relative to the fixed region 311 and the bendable region 312 to which it is connected, and the protruding folds of the stretchable region 313 can be accommodated in the corresponding accommodating space 400.

[0135] In some examples, when the retractable region 313 is in a retracted state, the side of the retractable region 313 facing the receiving space 400 may protrude beyond the fixed region 311 and the bendable region 312 to which it is connected, while the side of the retractable region 313 facing away from the receiving space 400 may not protrude beyond the fixed region 311 and the bendable region 312 to which it is connected. This further reduces the impact of the retractable region 313 on the display of the flexible screen 200.

[0136] In the embodiments of this application, the end of the housing 110 facing the rotating shaft mechanism 120 has a first inclined portion 113, and the end of the rotating shaft mechanism 120 facing the housing 110 has a second inclined portion 123. The housing 110 and the rotating shaft mechanism 120 form an accommodating space 400 through the first inclined portion 113 and the second inclined portion 123.

[0137] This facilitates the formation of a receiving space 400 at the junction of the housing 110 and the pivot mechanism 120 to accommodate the retractable area 313. Furthermore, when the foldable device switches from a flattened state to a folded state, the first inclined surface 113 and the second inclined surface 123 also reduce the risk of the housing 110 and the pivot mechanism 120 coming into contact with the flexible screen 200 and the flexible heat-conducting sheet 310, thus preventing damage to the flexible screen 200 and the flexible heat-conducting sheet 310.

[0138] Understandably, in the example where the housing 110 includes a middle frame 111, the end of the middle frame 111 facing the pivot mechanism 120 has a first beveled portion 113.

[0139] In the embodiments of this application, when the rotating shaft mechanism 120 includes a main shaft 121 and a rotatable door panel 122, the rotatable door panel 122 has a second inclined portion 123 at one end facing the adjacent housing 110.

[0140] This reduces the risk of the flexible heat-conducting sheet 310 between the rotatable door panel 122 and the housing 110 getting stuck, causing damage to the flexible heat-conducting sheet 310 and affecting the opening and closing of the foldable device.

[0141] In some examples, in the thickness direction of the flexible heat-conducting sheet 310, the distance between the end of the first inclined portion 113 away from the flexible screen 200 and the flexible screen 200 is greater than the distance between the end of the second inclined portion 123 away from the flexible screen 200 and the flexible screen 200.

[0142] Figure 11 This is a schematic diagram of a flexible heat-conducting sheet for another foldable device provided in this application embodiment, viewed from a perspective when the foldable device is in a flattened state.

[0143] like Figure 11 As shown, and see Figures 8-10 In the embodiments of this application, the rotating shaft mechanism 120 may be provided with a connecting structure 124 that is fastened to the flexible screen 200. The flexible heat-conducting sheet 310 is provided with a connecting hole 314 that corresponds one-to-one with the connecting structure 124. The connecting structure 124 passes through the corresponding connecting hole 314 and is fastened to the flexible screen 200. There is a gap between the connecting hole 314 and the connecting structure 124 inside it, allowing the flexible heat-conducting sheet 310 to move along the flexible screen 200.

[0144] Understandably, the connecting hole 314 is located in the bendable region 312.

[0145] In this way, in the foldable device equipped with the flexible heat-conducting sheet 310, the bendable display area 220 of the flexible screen 200 can be securely connected to the pivot mechanism 120, which facilitates control over the shape of the flexible screen 200 during and after folding. The bendable area 312 can move along the flexible screen 200, and the connection structure 124 has little impact on the expansion and contraction of the flexible heat-conducting sheet 310.

[0146] It is understandable that the rotatable door panel 122 of the pivot mechanism 120 can be securely connected to the corresponding door panel support sub-area 222 of the flexible screen 200.

[0147] Multiple connecting structures 124 can be provided on each rotatable door panel 122, which are distributed axially along the main shaft 121. Each door panel support sub-region 222 is fastened to the corresponding rotatable door panel 122 through multiple connecting structures 124.

[0148] In some examples, the connection structure 124 may be an adhesive structure, and the pivot mechanism 120 and the flexible screen 200 may be bonded and fixed by an adhesive structure located in the connecting hole 314.

[0149] In some examples, the connecting hole 314 is a square hole, with the long side of the square hole parallel to the axis of the rotating shaft mechanism 120.

[0150] This increases the connection surface between the flexible screen 200 and the pivot mechanism 120, making the connection between the flexible screen 200 and the pivot structure more stable.

[0151] In some examples, the connecting structure 124 for connecting with the flexible screen 200 may not be provided on the rotating mechanism 120. In this case, the connecting hole 314 may not be provided on the flexible heat-conducting sheet 310.

[0152] like Figure 9 , Figure 10 As shown, in the embodiments of this application, at least a portion of the fixed region 311 and the elastic member 320 are fastened to the corresponding housing 110.

[0153] In other words, one end of the elastic member 320 that is fastened to the fixed area 311 extends to the housing 110 adjacent to the elastic member 320 and is fastened to the housing 110 adjacent to the elastic member 320.

[0154] Understandably, in the example where the display module includes the heat-conducting sheet assembly 300, at least a portion of the portion of the fixed region 311 that is fastened to the elastic member 320 is fastened to the corresponding fixed display region 210. In other words, one end of the elastic member 320 that is fastened to the fixed region 311 extends to and is fastened to the adjacent fixed display region 210. After the display module is assembled onto the housing assembly 100, the end of the elastic member 320 used for fastening the fixed region 311 can be fastened to the corresponding housing 110 via the corresponding fixed display region 210.

[0155] This reduces the force exerted on the adjacent fixed area 311 by the elastic element 320 when it extends or retracts, thereby reducing the risk of the fixed area 311 being damaged by the elastic element 320.

[0156] In the embodiments of this application, the elastic element 320 is fastened to the side of the flexible heat-conducting sheet 310 facing the flexible screen 200.

[0157] This reduces the risk of the elastic element 320 jamming with the housing 110 and the rotating shaft mechanism 120. Furthermore, when the retractable region 313 protrudes away from the flexible screen 200 in its retracted state, the folds formed during the transition from the extended to the retracted state of the retractable region 313 are less likely to be blocked by the elastic element 320, thus reducing the impact on the deformation of the retractable region 313.

[0158] In some embodiments of this application, the side of the fixed area 311 facing the flexible screen 200 is fastened to the corresponding fixed display area 210 so that the fixed area 311 is fastened to the corresponding housing 110.

[0159] In this way, the heat-conducting sheet assembly 300 can be fixed to the flexible screen 200 first, and then the fixed area 311 can be fixed to the corresponding housing 110 through the flexible screen 200. The heat-conducting sheet assembly 300 and the flexible screen 200 are tightly combined, and the flexible heat-conducting sheet 310 can be easily bent through the flexible screen 200.

[0160] It is understood that adhesive can be provided on the side of the fixed area 311 and the part of the elastic member 320 that is fastened to the fixed area 311 facing the flexible screen 200, and the fixed area 311 and the part of the elastic member 320 that is fastened to the fixed area 311 facing the flexible screen 200 are fastened to the corresponding fixed display area 210 by adhesive.

[0161] In some embodiments of this application, the side of the fixed region 311 facing away from the flexible screen 200 is fastened to the corresponding housing 110.

[0162] In this way, the heat-conducting plate assembly 300 and the housing assembly 100 are easier to assemble.

[0163] It is understandable that adhesive can be provided on the side of the fixed area 311 away from the flexible screen 200, and the side of the fixed area 311 away from the flexible screen 200 is fastened to the corresponding housing 110 by adhesive.

[0164] In some embodiments of this application, the side of the fixed area 311 facing the flexible screen 200 may be fastened to the corresponding fixed display area 210, and the side of the fixed area 311 away from the flexible screen 200 may be fastened to the corresponding housing 110.

[0165] In this way, the fixed area 311 is more securely fixed to the shell 110.

[0166] In the embodiments of this application, the fixed display area 210 can be fastened to the corresponding housing 110 by an adhesive structure. In this way, after the fixed display area 210 is glued and fixed to the corresponding housing 110, a space for installing the corresponding fixed area 311 can be formed between the fixed display area 210 and the corresponding housing 110.

[0167] Figure 12 This is a schematic diagram of the assembly of the heat-conducting sheet assembly, the rotating shaft mechanism, and the flexible screen when another foldable device provided in this application is in a folded state.

[0168] In the embodiments of this application, the flexible screen 200 protrudes from the heat-conducting sheet assembly 300 on both sides of the rotating shaft mechanism 120 in the axial direction.

[0169] In this way, an adhesive strip can be provided on the part of the flexible screen 200 that protrudes from the heat-conducting sheet assembly 300 in the fixed display area 210. The flexible screen 200 is bonded and fixed to the corresponding housing 110 by the adhesive strip, which helps to make the fixed display area 210 and the housing 110 more firmly bonded and fixed, and also helps to form a larger space for installing the corresponding fixed area 311.

[0170] Figure 13 This is a schematic diagram from one perspective of the elastic element of another foldable device provided in an embodiment of this application when the foldable device is in a flattened state. Figure 14 This is a schematic diagram from another perspective of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a flattened state.

[0171] like Figure 13 , Figure 14 As shown in the embodiments of this application, the elastic element 320 is a sheet-like elastic element.

[0172] In this way, the elastic element 320 occupies little space in the thickness direction of the foldable device, which helps to make the foldable device thinner and lighter. In addition, the sheet-like elastic element 320 also facilitates a stable connection with the flexible heat-conducting sheet 310.

[0173] like Figure 13 , Figure 14 As shown, and see Figure 6 , Figure 7 In the embodiments of this application, the elastic member 320 includes an elastic telescopic portion 323 and a first fixing piece 321 and a second fixing piece 322 respectively fastened to opposite ends of the elastic telescopic portion 323. The elastic telescopic portion 323 is opposite to the corresponding telescopic region 313, the first fixing piece 321 is fastened to the fixing region 311, and the second fixing piece 322 is fastened to the bendable region 312.

[0174] This facilitates a stable connection between the elastic element 320 and the corresponding fixed area 311 and bendable area 312.

[0175] It is understandable that during the process of the elastic member 320 switching from the initial state to the stretched state, the elastic extension portion 323 extends along the length direction of the flexible heat-conducting sheet 310, and during the process of the elastic member 320 switching from the stretched state to the initial state, the elastic extension portion 323 shortens along the length direction of the flexible heat-conducting sheet 310.

[0176] During the transition from a flattened state to a folded state, the second fixed plate 322 moves away from the corresponding first fixed plate 321 along the length of the flexible heat-conducting sheet 310 along with the bendable area 312 it is fastened to, thereby pulling the corresponding elastic telescopic part 323 and causing it to extend along the length of the flexible heat-conducting sheet 310. The bendable area 312 fastened to the second fixed plate 322 pulls the connected telescopic area 313, causing the stretched telescopic area 313 to extend and switch to an unfolded state. During the transition from a folded state to a flattened state, the elastic telescopic part 323 shortens under its own elastic restoring force. The second fixing piece 322 is pulled by the elastic telescopic part 323 connected to it, moving along the length of the flexible heat-conducting sheet 310 towards the corresponding first fixing piece 321. This causes the bendable area 312, which is fastened to the second fixing piece 322, to move towards the fixed area 311, which is fastened to the first fixing piece 321. This shortens the corresponding telescopic area 313 of the elastic telescopic part 323, so that the elastic telescopic part 323 switches to a contracted state.

[0177] It should be noted that the elastic telescopic part 323 has a sheet-like structure, and the two sides of the elastic contraction part 323 in the thickness direction of the flexible heat-conducting sheet 310 are parallel to the portion of the flexible screen 200 opposite to the elastic contraction part 323. It can be understood that when the elastic member 320 is in its initial state, the two sides of the elastic contraction part 323 in the thickness direction of the flexible heat-conducting sheet 310 can be planes parallel to the flexible screen 200; when the elastic member 320 is in a stretched state, the two sides of the elastic contraction part 323 in the thickness direction of the flexible heat-conducting sheet 310 can be arc surfaces parallel to the portion of the flexible screen 200 opposite to the elastic contraction part 323. This allows the elastic telescopic part 323 to occupy less space in the thickness direction of the foldable device, making the foldable device thinner and lighter. It also reduces the risk of the elastic telescopic part 323 contacting the flexible screen 200 and affecting its display.

[0178] In the embodiments of this application, when the elastic member 320 is in the initial state and the corresponding stretchable region 313 is in the contracted state, the side of the stretchable region 313 near the elastic stretchable part 323 is spaced apart from the elastic stretchable part 323 in the thickness direction of the flexible heat-conducting sheet 310.

[0179] In this way, the wrinkles formed during the process of the stretchable region 313 switching from the expanded state to the contracted state are not easily blocked by the elastic stretchable part 323, which can reduce the impact on the deformation of the stretchable region 313.

[0180] In some examples, the elastic extension portion 323 may include multiple elastic strips that are wavy and parallel to each other when the elastic member 320 is in the initial state, with the two ends of each elastic strip being fastened to the adjacent first fixing portion 321 and second fixing portion 322 respectively.

[0181] When the elastic element 320 is in its initial state, the plane containing the elastic strip can be parallel to the plane containing the flexible screen 200. The elastic strip can be curved and may include at least one curve that bends and deforms along the width direction of the display screen. The line connecting the projections of the curved portion of the elastic strip onto the width direction of the display screen extends along the width direction of the flexible screen. The elastic strip can be wavy; for example, the elastic strip may include at least one peak and at least one trough, and the line connecting the projections of the at least one peak and at least one trough onto the width direction of the display screen extends along the width direction of the flexible screen. The elastic strip may include peaks and troughs, and the line connecting the projections of the peaks and troughs of the elastic strip onto the width direction of the display screen extends along the width direction of the flexible screen. For example, each wavy elastic strip may include at least one crest and one trough. The projection of the end of each elastic strip used to connect with the first fixing piece 321 in the width direction of the flexible screen may be located between the projections of the crest and the trough of the elastic strip in the width direction of the flexible screen. The projection of the end of each elastic strip used to connect with the second fixing piece 322 in the width direction of the flexible screen may be located between the projections of the crest and the trough of the elastic strip in the width direction of the flexible screen.

[0182] In some embodiments, the elastic strip may also be part of the carrier plate of the flexible screen.

[0183] Understandably, during the transition from the stretched state to the initial state, the projected dimension of the elastic strip in the width direction of the flexible screen increases, while the projected dimension in the length direction decreases. This allows the elastic telescopic part 323 to occupy less space in the thickness direction of the foldable device, facilitating a thinner and lighter foldable device. It also reduces the risk of the elastic telescopic part 323 contacting the flexible screen 200 and affecting its display.

[0184] It is understood that the elastic strip can be a sheet-like structure, and the two sides of the elastic strip in the thickness direction of the flexible heat-conducting sheet 310 are parallel to the portion of the flexible screen 200 opposite to the elastic strip. It is understood that when the elastic member 320 is in the initial state, the two sides of the elastic strip in the thickness direction of the flexible heat-conducting sheet 310 can be planes parallel to the flexible screen 200; when the elastic member 320 is in the stretched state, the two sides of the elastic strip in the thickness direction of the flexible heat-conducting sheet 310 can be arc surfaces parallel to the portion of the flexible screen 200 opposite to the elastic strip.

[0185] In some examples, the elastic telescopic portion 323 may include an elastic structure formed by elastic bars, with both ends of the elastic structure being fastened to the adjacent first fixing portion 321 and second fixing portion 322, respectively.

[0186] The flexible structure can include shapes such as rectangular holes, diamond holes, round holes, or elliptical holes.

[0187] The elastic structure can be an elastic mesh structure. For example, the mesh openings of the elastic mesh can be rectangular holes. Along the length direction of the flexible heat-conducting sheet 310, the elastic mesh structure has multiple rows of rectangular holes. Multiple rectangular holes in each row are distributed along the width direction of the flexible heat-conducting sheet 310. Multiple rectangular holes in two adjacent rows can be staggered in the width direction of the flexible heat-conducting sheet 310.

[0188] Figure 15 This is a schematic diagram from one perspective of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a folded state. Figure 16 This is a schematic diagram from another perspective of the elastic element of another foldable device provided in the embodiments of this application when the foldable device is in a folded state.

[0189] like Figure 15 , Figure 16 As shown, and see Figure 13 , Figure 14 It is understandable that when the foldable device switches from a flattened state to a folded state, the distance between the first fixing piece 321 and the corresponding second fixing piece 322 increases, the elastic telescopic part 323 stretches, and the elastic element 320 as a whole can bend. It should be noted that when the elastic element 320 bends as a whole, the first fixing piece 321 and the second fixing piece 322 may not bend, but the elastic telescopic part 323 can cause the entire elastic element 320 to bend. Alternatively, portions of the first fixing piece 321 and the second fixing piece 322, as well as the elastic telescopic part 323, may all bend.

[0190] In the embodiments of this application, one end of the elastic member 320 is bonded and fixed to the adjacent fixed area 311, and the other end of the elastic member 320 is bonded and fixed to the adjacent bendable area 312.

[0191] In this way, the connection between the elastic element 320 and the flexible heat-conducting sheet 310 is less likely to damage the flexible heat-conducting sheet 310.

[0192] It is understood that in the example where the elastic member 320 includes a first fixing piece 321 and a second fixing piece 322, the first fixing piece 321 can be bonded and fixed to the corresponding fixing area 311, and the second fixing piece 322 can be bonded and fixed to the corresponding bendable area 312.

[0193] Figure 17 This is a schematic diagram of a cross-section of a heat-conducting sheet assembly of a foldable device provided in an embodiment of this application, where an elastic element is provided when the foldable device is in a flattened state.

[0194] like Figure 17 As shown in the embodiments of this application, the flexible thermal conductive sheet 310 includes a graphite sheet 315, a first wrapping film 316, and a second wrapping film 317. The first wrapping film 316 is bonded and fixed to the side of the graphite sheet 315 facing the flexible screen 200, and the second wrapping film 317 is bonded and fixed to the side of the graphite sheet 315 away from the flexible screen 200. An elastic member 320 is fastened to the first wrapping film 316. The housing 110 is fastened to the second wrapping film 317, or the housing 110 is fastened to the first wrapping film 316 via the flexible screen 200.

[0195] It is understandable that when the housing 110 is fastened to the first wrapping film 316 through the flexible screen 200, the housing 110 is fastened to the corresponding fixed display area 210 of the flexible screen 200, and the fixed display area 210 is fastened to the first wrapping film 316, so that the housing 110 is fastened to the first wrapping film 316 through the corresponding fixed display area 210.

[0196] In the example where the display module includes a heat-conducting sheet assembly 300, the fixed display area 210 is securely connected to the first wrapping film 316. After the display module is assembled onto the housing assembly 100, the housing 110 is securely connected to the first wrapping film 316 via the fixed display area 210.

[0197] In this way, the graphite sheet 315 conducts heat, and the flexible heat-conducting sheet 310 has good thermal conductivity. The surface of the graphite sheet 315 is wrapped by the first wrapping film 316 and the second wrapping film 317. The first wrapping film 316 and the second wrapping film 317 can play a certain protective role for the graphite sheet 315 and facilitate the tight connection between the graphite sheet 315 and the shell 110 and the elastic element 320.

[0198] Figure 18 This is a schematic diagram of a graphite sheet of another foldable device provided in an embodiment of this application, viewed from the perspective of the foldable device in a flattened state.

[0199] like Figure 18 As shown, and see Figure 17In the embodiments of this application, the portion of the first wrapping film 316 located in the fixed region 311 is fastened to the elastic member 320 to form a first connecting sub-region 3111, and the portion of the first wrapping film 316 located in the bendable region 312 is fastened to the elastic member 320 to form a second connecting sub-region 3121. A graphite sheet 315 located in the fixed region 311 has a first through hole 318, the axial projection of the first through hole 318 on the first wrapping film 316 being at least partially within the first connecting sub-region 3111, and the first wrapping film 316 and the second wrapping film 317 are bonded and fixed at the first through hole 318. A graphite sheet 315 located in the bendable region 312 has a second through hole 319, the axial projection of the second through hole 319 on the first wrapping film 316 being at least partially within the second connecting sub-region 3121, and the first wrapping film 316 and the second wrapping film 317 are bonded and fixed at the second through hole 319.

[0200] In this way, the first encapsulating film 316 and the second encapsulating film 317 bonded within the first through hole 318 and the second through hole 319 can reduce the risk of graphite sheet 315 delamination and improve the tensile strength of the flexible heat-conducting sheet 310, which includes the graphite sheet 315 layer, the first encapsulating film 316, and the second encapsulating film 317. The first encapsulating film 316 and the second encapsulating film 317 are bonded to the first connecting sub-region 3111 and the second connecting sub-region 3121, respectively, which has a good effect on improving the tensile strength of the flexible heat-conducting sheet 310.

[0201] It is understood that in the example where the elastic member 320 includes a first fixing piece 321 and a second fixing piece 322, the first fixing piece 321 is fastened to at least a portion of the first wrapping film 316 at the first through hole 318 of the corresponding fixing region 311, and the second fixing piece 322 is fastened to at least a portion of the second wrapping film 317 at the second through hole 319 of the corresponding bendable region 312.

[0202] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0203] 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.

[0204] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A foldable device, characterized in that, It includes a housing assembly (100), a flexible screen (200), and a heat-conducting sheet assembly (300), wherein the flexible screen (200) is disposed on the housing assembly (100), and the heat-conducting sheet assembly (300) is disposed between the flexible screen (200) and the housing assembly (100); The housing assembly (100) includes at least two housings (110) and a pivot mechanism (120) located between two adjacent housings (110), the two adjacent housings (110) being rotatably connected by the pivot mechanism (120); The heat-conducting sheet assembly (300) includes a flexible heat-conducting sheet (310) and an elastic element (320); The flexible heat-conducting sheet (310) includes a fixed area (311), a bendable area (312), and a retractable area (313). The fixed area (311) corresponds one-to-one with the housing (110) and is fastened to the corresponding housing (110). The bendable area (312) corresponds to the rotating shaft mechanism (120) and is arranged opposite to the corresponding rotating shaft mechanism (120). The bendable area (312) and the adjacent fixed area (311) have the retractable area (313). The bendable area (312) and the adjacent fixed area (311) are connected through the retractable area (313) between them. The retractable area (313) is provided with the elastic element (320), one end of the elastic element (320) is fastened to the adjacent fixed area (311), and the other end of the elastic element (320) is fastened to the adjacent bendable area (312). The retractable region (313) has a contracted state and an expanded state, and the elastic element (320) has an initial state and a stretched state; When the foldable device switches from a flattened state to a folded state, the retractable area (313) switches from a contracted state to an unfolded state to extend the retractable area (313), and the elastic element (320) switches from an initial state to a stretched state to extend the elastic element (320). When the foldable device switches from the folded state to the flattened state, the retractable area (313) switches from the unfolded state to the contracted state to shorten the retractable area (313), and the elastic element (320) switches from the stretched state to the initial state to shorten the elastic element (320).

2. The foldable device as claimed in claim 1, characterized in that, When the foldable device is in the flattened state, there is a receiving space (400) between the housing (110) and the pivot mechanism (120), and the retractable area (313) is at least partially located in the receiving space (400) between the housing (110) and the pivot mechanism (120) corresponding to the fixed area (311) to which it is connected.

3. The foldable device as described in claim 2, characterized in that, The housing (110) has a first inclined portion (113) at one end facing the rotating shaft mechanism (120), and the rotating shaft mechanism (120) has a second inclined portion (123) at one end facing the housing (110). The housing (110) and the rotating shaft mechanism (120) form the receiving space (400) through the first inclined portion (113) and the second inclined portion (123).

4. The foldable device as described in claim 3, characterized in that, The rotating shaft mechanism (120) includes a main shaft (121) and a rotatable door panel (122); The main shaft (121) is located between two adjacent housings (110), and the two adjacent housings (110) are rotatably connected by the main shaft (121) between them. A rotatable door panel (122) is provided between the main shaft (121) and the housing (110). The rotatable door panel (122) is rotatably connected to the main shaft (121). The housing (110) is driven to drive the adjacent rotatable door panel (122) so that the housing (110) drives the rotatable door panel (122) connected to it to rotate around the main shaft (121). The rotatable door panel (122) has a second inclined surface (123) at the end facing the adjacent housing (110).

5. The foldable device according to any one of claims 1-4, characterized in that, The elastic element (320) is fastened to the side of the flexible heat-conducting sheet (310) facing the flexible screen (200).

6. The foldable device according to any one of claims 1-4, characterized in that, The elastic element (320) is a sheet-like elastic element.

7. The foldable device as claimed in claim 6, characterized in that, The elastic element (320) includes an elastic telescopic part (323) and a first fixing piece (321) and a second fixing piece (322) respectively fastened to opposite ends of the elastic telescopic part (323); The elastic telescopic part (323) is opposite to the corresponding telescopic area (313), the first fixing piece (321) is fastened to the fixing area (311), and the second fixing piece (322) is fastened to the bendable area (312).

8. The foldable device according to any one of claims 1-4 and 7, characterized in that, One end of the elastic element (320) is bonded and fixed to the adjacent fixed area (311), and the other end of the elastic element (320) is bonded and fixed to the adjacent bendable area (312).

9. The foldable device according to any one of claims 1-4 and 7, characterized in that, The flexible heat-conducting sheet (310) includes a graphite sheet (315), a first wrapping film (316), and a second wrapping film (317). The first wrapping film (316) is bonded and fixed to the side of the graphite sheet (315) facing the flexible screen (200), and the second wrapping film (317) is bonded and fixed to the side of the graphite sheet (315) away from the flexible screen (200). The elastic element (320) is fastened to the first wrapping film (316); The housing (110) is fastened to the second wrapping film (317), or the housing (110) is fastened to the first wrapping film (316) through the flexible screen (200).

10. The foldable device as claimed in claim 9, characterized in that, The portion of the first wrapping film (316) located in the fixed area (311) and the portion of the elastic member (320) fastened together form a first connecting sub-area (3111), and the portion of the first wrapping film (316) located in the bendable area (312) and the portion of the elastic member (320) fastened together form a second connecting sub-area (3121). The graphite sheet (315) located in the fixed area (311) has a first through hole (318), the axial projection of the first through hole (318) on the first wrapping film (316) is at least partially within the first connecting sub-area (3111), and the first wrapping film (316) and the second wrapping film (317) are bonded and fixed at the first through hole (318); The graphite sheet (315) located in the bendable region (312) has a second through hole (319). The axial projection of the second through hole (319) on the first wrapping film (316) is at least partially within the second connecting sub-region (3121). The first wrapping film (316) and the second wrapping film (317) are bonded and fixed at the second through hole (319).

11. The foldable device according to any one of claims 1-4, 7 and 10, characterized in that, The rotating shaft mechanism (120) is provided with a connecting structure (124) that is fastened to the flexible screen (200). The flexible heat-conducting sheet (310) has a connecting hole (314) that corresponds to the connecting structure (124). The connecting structure (124) passes through the corresponding connecting hole (314) and is fastened to the flexible screen (200). There is a gap between the connecting hole (314) and the connecting structure (124) inside it, allowing the flexible heat-conducting sheet (310) to move along the flexible screen (200).

12. The foldable device according to any one of claims 1-4, 7 and 10, characterized in that, At least a portion of the fixed region (311) and the portion of the elastic element (320) that are fastened together are fastened together to the corresponding housing (110).

13. The foldable device according to any one of claims 1-4, 7 and 10, characterized in that, The flexible screen (200) includes a fixed display area (210) corresponding to the housing (110) in one by one. The fixed display area (210) is fastened to the corresponding housing (110). The side of the fixed area (311) facing the flexible screen (200) is fastened to the corresponding fixed display area (210) so that the fixed area (311) is fastened to the corresponding housing (110).

14. The foldable device according to any one of claims 1-4, 7 and 10, characterized in that, The flexible screen (200) includes a fixed display area (210) corresponding to the housing (110) in one by one. The fixed display area (210) is fastened to the corresponding housing (110). The side of the fixed area (311) facing away from the flexible screen (200) is fastened to the corresponding housing (110).

15. A display module, characterized in that, Includes a flexible screen (200) and a heat-conducting sheet assembly (300); The flexible screen (200) includes at least two fixed display areas (210) and a bendable display area (220) located between two adjacent fixed display areas (210), and the two adjacent fixed display areas (210) are connected by the bendable display area (220) between them; The heat-conducting sheet assembly (300) includes a flexible heat-conducting sheet (310) and an elastic element (320); The flexible heat-conducting sheet (310) includes a fixed area (311), a bendable area (312), and a stretchable area (313). The fixed area (311) corresponds one-to-one with the fixed display area (210) and is fastened to the corresponding fixed display area (210). The bendable area (312) corresponds to the bendable display area (220) and is arranged opposite to the corresponding bendable display area (220). The bendable area (312) has the stretchable area (313) between it and the adjacent fixed area (311). The bendable area (312) and the adjacent fixed area (311) are connected through the stretchable area (313) between them. The retractable area (313) is provided with the elastic element (320), one end of the elastic element (320) is fastened to the adjacent fixed area (311), and the other end of the elastic element (320) is fastened to the adjacent bendable area (312). The retractable region (313) has a contracted state and an expanded state, and the elastic element (320) has an initial state and a stretched state; When the bendable display area (220) switches from a flat state to a bendable state, the retractable area (313) switches from a contracted state to an unfolded state to extend the retractable area (313), and the elastic element (320) switches from an initial state to a stretched state to extend the elastic element (320). When the bendable display area (220) switches from the bendable state to the flat state, the stretchable area (313) switches from the unfolded state to the contracted state to shorten the stretchable area (313), and the elastic element (320) switches from the stretched state to the initial state to shorten the elastic element (320) in the direction of contraction.

16. The display module as described in claim 15, characterized in that, The elastic element (320) is fastened to the side of the flexible heat-conducting sheet (310) facing the flexible screen (200).

17. The display module as described in claim 15 or 16, characterized in that, The elastic element (320) is a sheet-like elastic element.

18. The display module as described in claim 17, characterized in that, The elastic element (320) includes an elastic telescopic part (323) and a first fixing piece (321) and a second fixing piece (322) respectively fastened to opposite ends of the elastic telescopic part (323); The elastic telescopic part (323) is opposite to the corresponding telescopic area (313), the first fixing piece (321) is fastened to the fixing area (311), and the second fixing piece (322) is fastened to the bendable area (312).

19. The display module as described in any one of claims 15-16 and 18, characterized in that, One end of the elastic element (320) is bonded and fixed to the adjacent fixed area (311), and the other end of the elastic element (320) is bonded and fixed to the adjacent bendable area (312).

20. The display module as described in any one of claims 15-16 and 18, characterized in that, The flexible heat-conducting sheet (310) includes a graphite sheet (315), a first wrapping film (316), and a second wrapping film (317). The first wrapping film (316) is bonded and fixed to the side of the graphite sheet (315) facing the flexible screen (200), and the second wrapping film (317) is bonded and fixed to the side of the graphite sheet (315) away from the flexible screen (200). The elastic element (320) is fastened to the first wrapping film (316); The fixed display area (210) is securely connected to the first wrapping film (316).

21. The display module as described in claim 20, characterized in that, The portion of the first wrapping film (316) located in the fixed area (311) and the portion of the elastic member (320) fastened together form a first connecting sub-area (3111), and the portion of the first wrapping film (316) located in the bendable area (312) and the portion of the elastic member (320) fastened together form a second connecting sub-area (3121). The graphite sheet (315) located in the fixed area (311) has a first through hole (318), the axial projection of the first through hole (318) on the first wrapping film (316) is at least partially within the first connecting sub-area (3111), and the first wrapping film (316) and the second wrapping film (317) are bonded and fixed at the first through hole (318); The graphite sheet (315) located in the bendable region (312) has a second through hole (319). The axial projection of the second through hole (319) on the first wrapping film (316) is at least partially within the second connecting sub-region (3121). The first wrapping film (316) and the second wrapping film (317) are bonded and fixed at the second through hole (319).

22. The display module as described in any one of claims 15-16 and 18, characterized in that, The bendable area (312) is provided with a connecting hole (314).

23. The display module as described in any one of claims 15-16, 18, and 21, characterized in that, At least a portion of the fixed area (311) and the portion of the elastic member (320) that are fastened together are fastened together in the corresponding fixed display area (210).

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