Foldable electronic device

Abstract

The invention provides foldable electronic equipment. The electronic equipment comprises a shell assembly and a heat dissipation assembly, the shell assembly comprises a first shell, a second shell and a rotating shaft assembly; the first shell and the second shell are respectively connected with the rotating shaft assembly and can relatively rotate around the rotating shaft assembly; the heat dissipation assembly comprises a flexible thin film heat dissipation sheet and a stretching device; the flexible thin film cooling fin is arranged on the rotating shaft assembly in a striding mode, and the stretching device is fixedly arranged on the first shell. One end of the flexible thin film cooling fin is connected with the second shell, the other end of the flexible thin film cooling fin is connected with the stretching device, and the stretching device is used for stretching the flexible thin film cooling fin, so that the flexible thin film cooling fin releases or absorbs length redundancy of the flexible thin film cooling fin in the bending process of the shell assembly. The electronic equipment can prevent the flexible thin film cooling fin from propping the screen due to length redundancy, and the display quality and reliability of the flexible display screen are ensured.

Description

Technical Field

[0001] This application relates to the technical field of heat dissipation structures for foldable electronic devices, and specifically relates to a foldable electronic device. Background Art

[0002] Currently, the structure of a folding mobile phone generally consists of a flexible screen, a rotating shaft, and a housing. The housing includes a first housing and a second housing, and the first housing and the second housing are rotatably connected through a rotating shaft assembly. For a conventional folding mobile phone, the heat dissipation functions of the two parts of the first housing and the second housing rely on a cross-axis heat dissipation structure to evenly dissipate the heat generated when the mobile phone is working. The fixing scheme of the cross-axis heat dissipation structure is to fix the cross-axis heat dissipation structure on the middle frames of the first housing and the second housing. Since the outermost layer of the flexible screen is stretched when the folding mobile phone is unfolded to the folded state, with the conventional scheme, the cross-axis heat dissipation structure will be affected by the tensile force of the flexible screen. After a long time, creep and elongation will occur, resulting in redundancy of the cross-axis heat dissipation structure after unfolding, and then causing screen lifting, resulting in poor crease light and shadow, and even affecting the reliability of the flexible screen. Summary of the Invention

[0003] An embodiment of this application provides a foldable electronic device, which includes: a housing assembly and a heat dissipation assembly;

[0004] The housing assembly includes a first housing, a second housing, and a rotating shaft assembly; the first housing and the second housing are respectively connected to the rotating shaft assembly and can rotate relative to the rotating shaft assembly.

[0005] The heat dissipation assembly includes a flexible film heat sink and a stretching device; the flexible film heat sink straddles the rotating shaft assembly, and the stretching device is fixedly arranged on the first housing; one end of the flexible film heat sink is connected to the second housing, and the other end is connected to the stretching device. The stretching device is used to stretch the flexible film heat sink, so that the flexible film heat sink releases or absorbs the length redundancy of the flexible film heat sink during the bending process of the housing assembly.

[0006] For the foldable electronic device provided by the embodiment of this application, by setting a stretching device for the flexible film heat sink, the length redundancy of the flexible film heat sink can be released or absorbed during the bending process of the flexible film heat sink along with the housing assembly, and then the flexible film heat sink can be kept in a stretched state all the time. On the one hand, it can reduce the elongation amount of the flexible film heat sink being stretched and deformed during the folding process, thereby alleviating or even avoiding the deformation creep of the flexible film heat sink, playing a protective role for the flexible film heat sink, and improving the service life of the flexible film heat sink; on the other hand, since the flexible film heat sink is always in a stretched state, it can avoid the flexible film heat sink from lifting the screen (flexible display screen) due to length redundancy, ensuring the display quality and reliability of the flexible display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0008] Figure 1 is a schematic enlarged view of a partial structure of an electronic device with a conventional technical solution;

[0009] Figure 2 is a schematic structural diagram of an unfolded state of an embodiment of a foldable electronic device of the present application;

[0010] Figure 3 is Figure 2 a schematic structural diagram of the folded state of the electronic device in the embodiment;

[0011] Figure 4 is Figure 2 a schematic diagram of a partial structure disassembly of the unfolded state of the electronic device in the embodiment;

[0012] Figure 5 is Figure 3 a schematic diagram of a partial structure disassembly of the folded state of the electronic device in the embodiment;

[0013] Figure 6 is a schematic structural diagram of an embodiment of a stretching device of the present application;

[0014] Figure 7 is Figure 6 a schematic diagram of the disassembled structure of the stretching device in the embodiment;

[0015] Figure 8 is a schematic structural diagram of the cooperation between the stretching device and the flexible film heat sink in this embodiment;

[0016] Figure 9 is Figure 2 a schematic sectional view of the electronic device along line A-A in the embodiment;

[0017] Figure 10 is Figure 3 a schematic sectional view of the electronic device along line B-B in the embodiment;

[0018] Figure 11 is a schematic block diagram of the structural composition of an embodiment of the electronic device of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only partial embodiments of the present application rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0020] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. The terms "include" and "have" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or components inherent to these processes, methods, products, or devices.

[0021] Referring to "embodiments" herein means that a specific feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0022] As used herein, "electronic device" (or simply "terminal") includes, but is not limited to, devices configured to receive / transmit communication signals via wired connections (such as via the Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection, and / or another data connection / network) and / or via wireless interfaces (such as for cellular networks, Wireless Local Area Networks (WLANs), digital television networks such as DVB-H networks, satellite networks, AM-FM radio transmitters, and / or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communication System (PCS) terminals that may combine cellular radiotelephone with data processing, facsimile, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device configured with a cellular communication module.

[0023] Please refer to Figure 1 , Figure 1 FIG. Figure 1 is an enlarged schematic view of a partial structure of an electronic device of a conventional technical solution. Among them, the cross-axis heat sink 100a of it is prone to generate redundant regions 100a1 and 100a2 due to deformation. The redundant regions 100a1 and 100a2 abut against the flexible screen 100b, resulting in poor light and shadow of the flexible screen 100b. In severe cases, it will lead to reliability problems of the flexible screen 100b. The label 100c in the figure represents the rotating shaft assembly, and 100d and 100e represent the shells on both sides. In view of this, an embodiment of the present application provides a foldable electronic device.

[0024] Please refer to Figure 2 and Figure 3 , Figure 2 FIG. Figure 2 is a schematic structural view of an unfolded state of an embodiment of the foldable electronic device of the present application. Figure 3 FIG. Figure 3 Figure 2 is a schematic structural view of the folded state of the electronic device in the embodiment; it should be noted that the electronic device in the present application may include electronic devices with foldable flexible displays such as mobile phones, tablet computers, laptop computers, wearable devices, etc. The electronic device 10 includes, but is not limited to, the following structures: a housing assembly 100, a flexible display module 200, and a heat dissipation assembly 300.

[0025] Specifically, please refer to Figure 4 and Figure 5 , Figure 4 FIG. Figure 4 Figure 2Schematic diagram of the partial structure of the electronic device in the unfolded state in the embodiment Figure 5 is Figure 3 Schematic diagram of the partial structure of the electronic device in the folded state in the embodiment; the housing assembly 100 in this embodiment includes a first housing 110, a second housing 120, and a rotating shaft assembly 130; the detailed structure of the rotating shaft assembly 130 is within the understanding of those skilled in the art and will not be elaborated here. The first housing 110 and the second housing 120 are respectively connected to the rotating shaft assembly 130 and can rotate relative to the rotating shaft assembly 130, so that the electronic device can be in a folded ( Figure 3 in state) or flattened ( Figure 2 in state) for switching. Among them, the flexible display module 200 can be flattened or bent along with the housing assembly 100.

[0026] Please continue to refer to Figure 4 and Figure 5 , in this embodiment, the heat dissipation assembly 300 includes a flexible film heat sink 310 and a stretching device 320; the flexible film heat sink 310 straddles the rotating shaft assembly 130, and the stretching device 320 is fixed on the first housing 110; one end of the flexible film heat sink 310 is connected to the second housing 120 (specifically, it can be bonded), and the other end is connected to the stretching device 320. The stretching device is used to stretch the flexible film heat sink 310, so that the flexible film heat sink 310 releases or absorbs the length redundancy of the flexible film heat sink 310 during the bending process of the housing assembly 100.

[0027] Among them, the flexible film heat sink 310 is attached to the side of the flexible display module 200 close to the rotating shaft assembly 130 and is flattened or bent along with the flexible display module 200 and the housing assembly 100. Optionally, the flexible film heat sink 310 in this embodiment can be a graphite sheet.

[0028] Optionally, please refer to together Figure 6 and Figure 7 , Figure 6 is a schematic diagram of the structure of an embodiment of the stretching device in the present application, Figure 7 is Figure 6 Schematic diagram of the split structure of the stretching device in the embodiment. Among them, the stretching device 320 in this embodiment includes a fixed bracket 321, a moving bracket 322, and a driving member 323. The fixed bracket 321 is fixed on the first housing 110, and the driving member 323 is arranged between the fixed bracket 321 and the moving bracket 322 and is used to drive the moving bracket 322 to move relative to the fixed bracket 321 along the direction of the dotted arrow X in the figure.

[0029] Optionally, the driving member 323 in this embodiment includes a first magnetic body 3231 and a second magnetic body 3232. The first magnetic body 3231 is fixedly provided on the fixed bracket 321, and the second magnetic body 3232 is fixedly provided on the moving bracket 322. A repulsive force is generated between the first magnetic body 3231 and the second magnetic body 3232 (the minimum value of the repulsive force is less than the plastic deformation force of the flexible film heat sink 310), thereby driving the second magnetic body 3232 to have a tendency to move away from the fixed bracket 321; the flexible film heat sink 310 is connected to the fixed bracket 321 (specifically, it can be bonded through an adhesive layer 324) and wound around the moving bracket 322. Please refer to Figure 8 , Figure 8 FIG. Figure 8 is a schematic structural diagram of the stretching device cooperating with the flexible film heat sink in this embodiment. Among them, the flexible film heat sink 310 can be in a stretched state under the action of the tendency of the moving bracket 322 to move away from the fixed bracket 321 (in the direction of arrow X in the figure).

[0030] Optionally, please continue to refer to Figure 6 and Figure 7 , in this embodiment, the first magnetic body 3231 and the second magnetic body 3232 are respectively two. The two first magnetic bodies 3231 are respectively arranged at both ends of the fixed bracket 321, and the two second magnetic bodies 3232 are respectively arranged at both ends of the moving bracket 322, and the first magnetic body 3231 and the second magnetic body 3232 are arranged in one-to-one correspondence.

[0031] Among them, first installation grooves 3210 are respectively provided at opposite ends of the fixed bracket 321, second installation grooves 3220 are respectively provided at both ends of the moving bracket 322, and the two first magnetic bodies 3231 are respectively arranged in the first installation grooves 3210, and the two second magnetic bodies 3232 are respectively arranged in the second installation grooves 3220.

[0032] Optionally, please continue to refer to Figure 7 , in this embodiment, guide grooves 3211 are respectively provided at opposite ends of the fixed bracket 321. Both ends of the moving bracket 322 are inserted into the guide grooves 3211 and can slide along the guide grooves 3211. The two first magnetic bodies 3231 are respectively arranged corresponding to the guide grooves 3211 and can slide synchronously with the moving bracket 322 in the guide grooves 3211.

[0033] In addition, in some other embodiments, the driving member 323 can also be a spring. The two ends of the spring are respectively connected to the fixed bracket and the moving bracket. The flexible film heat sink is connected to the moving bracket. The spring pulls the flexible film heat sink through the moving bracket, so that the flexible film heat sink has a tendency to move towards the fixed bracket. The detailed features of this part are within the understanding scope of those skilled in the art and will not be elaborated here.

[0034] Please refer to Figure 9 andFigure 10 , Figure 9 is Figure 2 a schematic cross-sectional view of the structure of the electronic device along line A-A in the embodiment, Figure 10 is Figure 3 a schematic cross-sectional view of the structure of the electronic device along line B-B in the embodiment. The electronic device 10 in the embodiment of the present application may further include a functional device 400. Among them, the functional device 400 may include a battery 410 and a circuit board 420, etc. Among them, the functional device 400 (the battery 410 and the circuit board 420 in the figure) may be disposed in the accommodation cavity of the housing 100 (the first housing 110 and the second housing 120). Other structural features of the electronic device are within the understanding of those skilled in the art, and will not be listed and described in detail here.

[0035] Please refer to Figure 11 , Figure 11 which is a schematic block diagram of the structural composition of an embodiment of the electronic device of the present application. The electronic device may be a foldable mobile phone, tablet computer, notebook computer, wearable device, etc. In this embodiment, a foldable mobile phone is taken as an example. The structure of the electronic device 10 may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (which may be the flexible display module 200 in the foregoing embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980 (which may be the circuit board 420 in the foregoing embodiment), and a power supply 990 (which may be the battery 410 in the foregoing embodiment), etc. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide electrical energy for the entire electronic device 10.

[0036] Specifically, the RF circuit 910 is used to receive and transmit signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941, etc.; the sensor 950 includes an infrared sensor, a laser sensor, etc., and is used to detect user proximity signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 and are used to receive and transmit sound signals; the wifi module 970 is used to receive and transmit wifi signals, and the processor 980 is used to process the data information of the electronic device. For the specific structural features of the electronic device, please refer to the relevant descriptions in the foregoing embodiments, and will not be introduced in detail here.

[0037] The foldable electronic device provided by the embodiment of the present application is provided with a stretching device for the flexible film heat sink, which can release or absorb the length redundancy of the flexible film heat sink during the bending process of the flexible film heat sink along with the housing assembly, so as to keep the flexible film heat sink in a stretched state all the time. On the one hand, it can reduce the elongation of the flexible film heat sink being stretched and deformed during the folding process, thereby alleviating or even avoiding the deformation creep of the flexible film heat sink, playing a protective role for the flexible film heat sink and improving the service life of the flexible film heat sink; on the other hand, since the flexible film heat sink is always in a stretched state, it can avoid the flexible film heat sink from pushing against the screen (flexible display screen) due to length redundancy, ensuring the display quality and reliability of the flexible display screen.

[0038] The above are only partial embodiments of the present application, and thus do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall equally be included in the patent protection scope of the present application.

Claims

1. A foldable electronic device, characterized in that, The electronic device includes: a housing assembly and a heat dissipation assembly; The housing assembly includes a first housing, a second housing, and a rotating shaft assembly; the first housing and the second housing are respectively connected to the rotating shaft assembly and can rotate relative to the rotating shaft assembly; The heat dissipation assembly includes a flexible film heat sink and a stretching device; the flexible film heat sink is disposed across the rotating shaft assembly, and the stretching device is fixedly arranged on the first housing; one end of the flexible film heat sink is connected to the second housing, and the other end is connected to the stretching device, and the stretching device is used to stretch the flexible film heat sink so that the flexible film heat sink releases or absorbs the length redundancy during the bending process of the housing assembly.

2. The electronic device according to claim 1, wherein The stretching device includes a fixed bracket, a movable bracket, and a driving member. The fixed bracket is fixedly arranged on the first housing, and the driving member is disposed between the fixed bracket and the movable bracket and is used to drive the movable bracket to move relative to the fixed bracket.

3. The electronic device according to claim 2, wherein The driving member is a spring. The two ends of the spring are respectively connected to the fixed bracket and the movable bracket. The flexible film heat sink is connected to the movable bracket, and the spring pulls the flexible film heat sink through the movable bracket, so that the flexible film heat sink has a tendency to move towards the fixed bracket.

4. The electronic device according to claim 2, wherein The driving member includes a first magnetic body and a second magnetic body. The first magnetic body is fixedly arranged on the fixed bracket, and the second magnetic body is fixedly arranged on the movable bracket. A repulsive force is generated between the first magnetic body and the second magnetic body, thereby driving the second magnetic body to have a tendency to move away from the fixed bracket. The flexible film heat sink is connected to the fixed bracket and wound around the movable bracket. The flexible film heat sink can be in a stretched state under the action of the repulsive movement tendency between the movable bracket and the fixed bracket.

5. The electronic device according to claim 4, wherein The first magnetic body and the second magnetic body are respectively two. The two first magnetic bodies are respectively arranged at both ends of the fixed bracket, and the two second magnetic bodies are respectively arranged at both ends of the movable bracket, and the first magnetic body and the second magnetic body are respectively arranged in one-to-one correspondence.

6. The electronic device according to claim 5, wherein Guide grooves are respectively provided at opposite ends of the fixed bracket. Both ends of the movable bracket are respectively inserted into the guide grooves and can slide along the guide grooves.

7. The electronic device according to claim 6, wherein First mounting grooves are respectively provided at opposite ends of the fixed bracket. Second mounting grooves are respectively provided at both ends of the movable bracket. The two first magnetic bodies are respectively arranged in the first mounting grooves, and the two second magnetic bodies are respectively arranged in the second mounting grooves.

8. The electronic device according to claim 7, wherein The two first magnetic bodies are respectively correspondingly arranged in the guide grooves.

9. The electronic device according to claim 1, characterized in that The flexible film heat sink is a graphite sheet.

10. The electronic device according to claim 1, characterized in that, The electronic device further includes a flexible display module. The flexible film heat sink is attached to one side of the flexible display module close to the rotating shaft assembly. The flexible film heat sink and the flexible display module can be flattened or bent along with the housing assembly.

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