Electronic device

Abstract

The application discloses an electronic device, comprising a first frame, a second frame, a reel assembly, a flexible display screen and a spring assembly. The second frame is slidingly connected to the first frame, so that the electronic device can be switched between a contracted state and an expanded state. The reel assembly is rotationally connected to the second frame. The first end of the flexible display screen is connected to the first frame, and the second end of the flexible display screen passes through the reel assembly. One end of the spring assembly is connected to the second end of the flexible display screen, and the other end of the spring assembly is connected to the first frame. The elastic coefficient of the spring assembly changes with the change of temperature, so that the flexible display screen is in a tension state.

Description

Technical Field

[0001] This application belongs to the field of foldable device technology, specifically relating to an electronic device. Background Technology

[0002] With the development of mobile phones, users have increasingly higher demands for large-screen electronic devices. Rollable screen phones, which can switch screen display sizes, meet users' needs in different scenarios and have become a new development trend. However, during the unfolding or rewinding process relative to the casing, the flexible screen changes between tension and relaxation, especially when the temperature changes. This can cause stress accumulation inside the flexible screen, leading to screen deformation and delamination, and reducing the lifespan of rollable screen electronic devices. Summary of the Invention

[0003] This application aims to provide an electronic device that at least solves the problem of reduced lifespan of rollable screens due to arching deformation and delamination.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide an electronic device, comprising:

[0006] First frame;

[0007] The second frame is slidably connected to the first frame so that the electronic device can switch between a retracted state and an extended state;

[0008] The scroll assembly is rotatably connected to the second frame.

[0009] A flexible display screen, the first end of which is connected to the first frame, and the second end of which wraps around the roll assembly;

[0010] A spring assembly, one end of which is connected to the second end of the flexible display screen, and the other end of which is connected to the first frame;

[0011] The spring constant of the spring assembly changes with temperature to keep the flexible display under tension.

[0012] In the embodiments of this application, the spring assembly can tension the flexible display screen, enabling it to maintain a flat state. The stiffness of the spring assembly changes with temperature. For example, when the ambient temperature is high, the temperature of the spring assembly also increases, thus increasing its stiffness; when the ambient temperature is low, the temperature of the spring assembly also decreases, thus decreasing its stiffness. Under different ambient temperatures, the polymer material in the flexible display screen is affected by temperature changes, resulting in relaxation or tension. By adjusting the temperature of the spring assembly, the flexible screen can be kept in a taut state, thereby reducing deformation caused by stress changes. This application uses a spring assembly to tension the flexible display screen. When the ambient temperature changes, the tension force of the spring assembly on the flexible display screen also changes with temperature. Therefore, under the same deformation, the spring assembly can generate different tension forces, thus effectively tensioning the flexible display screen and preventing over-tensioning. The spring assembly can stably tension the flexible display screen under different ambient temperatures, preventing arching deformation and delamination, reducing the damage rate of the flexible display screen, and extending its service life.

[0013] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0015] Figure 1 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application;

[0016] Figure 2 This is one of the partial structural schematic diagrams of an electronic device according to an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of the structure of the polyimide sheet and pulley assembly according to an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the internal structure of an electronic device according to an embodiment of this application;

[0019] Figure 5 This is an exploded view of the driving component according to an embodiment of this application;

[0020] Figure 6 This is a schematic diagram of the structure of the driving component according to an embodiment of this application;

[0021] Figure 7 This is a schematic diagram of the structure of the driving component and the second frame according to an embodiment of this application;

[0022] Figure 8 yes Figure 7 Cross-sectional view along the AA direction;

[0023] Figure 9 This is a schematic diagram of the structure of the first frame and the second frame according to an embodiment of this application;

[0024] Figure 10 This is one of the structural schematic diagrams of the reel assembly according to an embodiment of this application;

[0025] Figure 11 This is a second schematic diagram of the structure of the reel assembly according to an embodiment of this application;

[0026] Figure 12 This is a schematic diagram of the internal structure layout of an electronic device according to an embodiment of this application;

[0027] Figure 13 This is a graph showing the change in the stored modulus of the shape memory alloy spring body with temperature according to an embodiment of this application.

[0028] Figure label:

[0029] 100 First frame, 110 Fixed support, 120 Insertion slot, 130 Fixed main body, 200 Second frame, 210 Comb-shaped support, 220 Insertion hole, 230 Movable main body, 300 Drive assembly, 310 Drive motor, 320 Gear set, 330 Lead screw, 340 Slider, 350 Push-pull rod, 351 Insertion, 360 Base shell, 370 Guide shaft, 380 Connecting pin, 400 Reel assembly Components: 410 Bearing, 420 Rolling Shaft, 430 Roller, 440 Base, 500 Flexible Display, 600 Spring Assembly, 610 Shape Memory Spring, 611 Spring Body, 612 Polyimide Sheet, 620 Pulley Assembly, 621 Fixed Shaft, 622 Rotating Component, 623 Torsion Spring, 624 Fixed Pulley, 625 Limiting Component, 710 First Guide Rail, 720 Second Guide Rail, 730 Circuit Board, 740 Battery. Detailed Implementation

[0030] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] The following is combined Figures 1-13 This application describes an electronic device according to an embodiment of the present application.

[0034] Combination Figure 1 and Figure 4 As shown, according to some embodiments of this application, the electronic device includes: a first frame 100, a second frame 200, a drive assembly 300, a scroll assembly 400, a flexible display screen 500, and a spring assembly 600. The second frame 200 is slidably connected to the first frame 100, allowing the electronic device to switch between a retracted state and an extended state. The drive assembly 300 is disposed on the first frame 100 and is used to drive the second frame 200 to move. The scroll assembly 400 is rotatably connected to the second frame 200. A first end of the flexible display screen 500 is connected to the first frame 100, and a second end of the flexible display screen 500 passes around the scroll assembly 400. One end of the spring assembly 600 is connected to the second end of the flexible display screen 500, and the other end of the spring assembly 600 is connected to the first frame 100. The elastic coefficient of the spring assembly 600 changes with temperature to keep the flexible display screen 500 in a tensioned state.

[0035] The first frame 100 and the second frame 200 are slidably connected. When the second frame 200 moves away from the first frame 100, the flexible display screen 500 gradually extends out of the second frame 200, and the electronic device switches from a retracted state to an extended state. When the second frame 200 moves closer to the first frame 100, the flexible display screen 500 gradually retracts into the second frame 200, and the electronic device switches from an extended state to a retracted state. This allows the electronic device to switch between large and small screens, meeting users' needs for different screen sizes.

[0036] The driving component 300 is used to drive the second frame 200 to move. Under the driving action of the driving component 300, the second frame 200 can slide relative to the first frame 100. When the flexible display screen 500 moves relative to the second frame 200, a portion of the flexible display screen 500 passes around the scroll assembly 400. The scroll assembly 400 can reduce the frictional force when the flexible display screen 500 moves relative to the second frame 200.

[0037] The spring assembly 600 can tension the flexible display screen 500, allowing the flexible display screen 500 to remain flat. The stiffness of the spring assembly 600 changes with temperature. For example, when the ambient temperature is high, the temperature of the spring assembly 600 will also rise, and the stiffness of the spring assembly 600 will increase. When the ambient temperature is low, the temperature of the spring assembly 600 will also decrease, and the stiffness of the spring assembly 600 will decrease.

[0038] Under different ambient temperatures, the polymer material in the flexible display screen 500 may relax or tighten due to temperature changes. In related technologies, if the tension force of the tensioning component remains constant, the flexible display screen 500 is prone to arching deformation or over-tensioning. In this embodiment, the flexible display screen 500 is tensioned by a spring assembly 600. As the ambient temperature changes, the tension force of the spring assembly 600 on the flexible display screen 500 also changes with the temperature. Therefore, under the same deformation, the spring assembly 600 can generate different tension forces, thereby effectively tensioning the flexible display screen 500 and preventing over-tensioning. The spring assembly 600 can stably tension the flexible display screen 500 under different ambient temperatures, preventing arching deformation and delamination, reducing the damage rate of the flexible display screen 500, and extending its service life.

[0039] Combination Figure 1 and Figure 2 As shown, in one possible embodiment, the spring assembly 600 includes a shape memory spring 610 and a pulley assembly 620. The first end of the shape memory spring 610 is connected to the flexible display screen 500, the pulley assembly 620 is disposed on the first frame 100, and the second end of the shape memory spring 610 is connected to the pulley assembly 620. The pulley assembly 620 is used to tension the shape memory spring 610.

[0040] The shape memory spring 610 is connected to the flexible display screen 500, thus enabling it to tension the flexible display screen 500. A pulley assembly 620 is provided on the first frame 100, which tensions the shape memory spring 610. During the extension or retraction of the flexible display screen 500 into the second frame 200, the pulley assembly 620 tensions the shape memory spring 610 to ensure it remains taut and to prevent loosening or over-tension. When the ambient temperature remains constant, the pulley assembly 620 ensures the shape memory spring 610 maintains a fixed or minimally fluctuating tension, improving the tension stability of the shape memory spring 610 on the flexible display screen 500.

[0041] In normal operating environments, such as 25°C to 35°C, the tension of the shape memory spring 610 and the driving power of the drive assembly 300 operate normally according to preset values.

[0042] Under conditions of high temperature and high humidity, such as 60°C and 90% relative humidity, and with prolonged use of electronic devices, the polymer material in the flexible display screen 500 will experience stress relaxation due to continuous stress. This can cause the flexible display screen 500 to fail to fit tightly against the roller assembly 400, making the flexible display screen 500 prone to arching and deformation. Under high temperature conditions, the stiffness of the shape memory spring 610 changes. With the same elongation, the tension force of the shape memory spring 610 on the flexible display screen 500 increases, ensuring a tight fit between the flexible display screen 500 and the roller assembly 400. This prevents the flexible display screen 500 from arching and deformation, reducing the risk of failure of the flexible display screen 500 under high temperature and high humidity conditions.

[0043] At low temperatures, such as -20°C and below, the modulus of the adhesive material in the flexible display screen 500 increases geometrically, leading to increased stiffness. Under these conditions, on the one hand, the flexible display screen 500 is prone to delamination failure; on the other hand, if the tensioning components of the flexible display screen 500 maintain a constant tension force, the driving assembly 300 may be unable to drive the flexible display screen 500 to unfold due to excessive tension, causing the flexible display screen 500 to jam and affecting user experience. In this embodiment, the stiffness of the shape memory spring 610 is lower in low-temperature environments, therefore the tension force provided by the shape memory spring 610 is lower than at room temperature. This allows the flexible display screen 500 to unfold under the same driving power, while reducing the risk of delamination failure in low-temperature environments and extending the service life of the flexible display screen 500.

[0044] Figure 13The graph shows the change in storage modulus (stiffness) of shape memory spring 610 with temperature. As the temperature increases, the storage modulus of shape memory spring 610 decreases.

[0045] In one possible embodiment, the spring assembly 600 further includes conductive fibers (not shown) wound around the shape memory spring 610 for heating the shape memory spring 610.

[0046] Conductive fibers are wound around the shape memory spring 610. When the conductive fibers are energized, the Joule heat generated by the conductive fibers will cause the temperature of the shape memory spring 610 to change, thereby adjusting the stiffness of the shape memory spring 610.

[0047] In one possible application, the conductive fiber can be energized at low temperatures. In this case, the stiffness of the shape memory spring 610 will be greater than that when the conductive fiber is not energized, and the stiffness of the shape memory spring 610 will be less than that at room temperature. This compensates for the elasticity of the shape memory spring 610, thereby reducing the warping caused by low temperatures.

[0048] By energizing the conductive fibers, the stiffness of the shape memory spring 610 can be adjusted more flexibly at different temperatures, enabling real-time adjustment of the stiffness of the shape memory spring 610, thereby further improving the tensioning effect of the shape memory spring 610 on the flexible display screen 500.

[0049] Combination Figure 2 and Figure 3 As shown, in one possible embodiment, the pulley assembly 620 includes: a fixed shaft 621, a rotating member 622, a torsion spring 623, and a fixed pulley 624. The fixed shaft 621 is fixed to the first frame 100. The rotating member 622 is sleeved on the fixed shaft 621 and can rotate relative to the first frame 100, specifically around the fixed shaft 621. The second end of the shape memory spring 610 is connected to the rotating member 622. The torsion spring 623 is sleeved on the fixed shaft 621 and is connected to the rotating member 622 and the first frame 100. The torsion spring 623 is used to drive the rotating member 622 to tension the shape memory spring 610. The fixed pulley 624 is rotatably connected to the second frame 200. The second end of the shape memory spring 610 passes over the fixed pulley 624 and is connected to the rotating member 622.

[0050] A fixed shaft 621 is mounted on the first frame 100. A shaft hole is provided on the rotating member 622, through which the fixed shaft 621 passes, allowing the rotating member 622 to rotate relative to the fixed shaft 621. A torsion spring 623 is mounted on the fixed shaft 621 and is also connected to the rotating member 622. When the relative position of the second frame 200 and the first frame 100 remains unchanged, the torsion spring 623 pulls the rotating member 622, causing the rotating member 622 to pull the shape memory spring 610, keeping the shape memory spring 610 in a tensioned state. This tensions the flexible display screen 500 through the shape memory spring 610.

[0051] When the electronic device moves from the retracted state to the unfolded state, the flexible display screen 500 moves. At this time, the torsion spring 623 pulls the rotating component 622 to rotate relative to the fixed shaft 621. The rotating component 622 can pull the shape memory spring component 610, so that the shape memory spring component 610 can be kept in a taut state.

[0052] When the electronic device moves from the unfolded state to the retracted state, the flexible display screen 500 moves. At this time, the shape memory spring 610 pulls the rotating component 622, and the rotating component 622 drives the torsion spring 623 to twist. The shape memory spring 610 and the rotating component 622 together tension the flexible display screen 500.

[0053] The second end of the shape memory spring 610 passes around the fixed pulley 624, which supports the shape memory spring 610 and further improves the tensioning effect of the shape memory spring 610.

[0054] Combination Figure 2 and Figure 3 As shown, in one possible embodiment, the shape memory spring 610 includes a spring body 611 and a polyimide strip 612. A first end of the spring body 611 is connected to the flexible display screen 500, and a first end of the polyimide strip 612 is connected to a second end of the spring body 611. The second end of the polyimide strip 612 passes over a fixed pulley 624 and is connected to a rotating member 622. The pulley assembly 620 also includes a limiting member 625, which is connected to the second frame 200. A portion of the limiting member 625 is located at the axial end face of the fixed pulley 624. When the polyimide strip 612 moves relative to the fixed pulley 624, the limiting member 625 limits the movement of the polyimide strip 612.

[0055] The stiffness of the spring body 611 changes with temperature, thus ensuring stable tension on the flexible display screen 500 under different ambient temperatures. The shape memory spring 610 comprises a spring body 611 and a polyimide strip 612. Since the shape memory spring 610 is relatively expensive, using a polyimide strip 612 instead of the spring body 611 reduces the production cost of electronic devices. Furthermore, because the material composition of the polyimide strip 612 is similar to that of the flexible display screen 500, their deformation under tension is essentially the same, ensuring that the flexible display screen 500 can be stably maintained under tension.

[0056] In one possible application, the first end of the spring body 611 is connected to the extended steel mesh and stainless steel layer of the flexible display screen 500.

[0057] The shape memory spring 610 includes a spring body 611 and a polyimide strip 612. In this embodiment, the polyimide strip 612 is wrapped around the fixed pulley 624. The polyimide strip 612 can fit tightly with the fixed pulley 624, so that the polyimide strip 612 can slide stably along the fixed pulley 624, which can avoid the problem of the spring body 611 and the fixed pulley 624 getting stuck.

[0058] When the electronic device switches between the retracted state and the unfolded state, the polyimide strip 612 can slide relative to the fixed pulley 624. The limiting member 625 limits the shape memory spring member 610, preventing the polyimide strip 612 from separating from the fixed pulley 624 along the axial direction of the fixed pulley 624, thereby improving the support stability of the fixed pulley 624 on the shape memory spring member 610.

[0059] In one possible application, the limiting member 625 has a "U"-shaped structure. When the limiting member 625 is fastened above the polyimide strip 612, a portion of the "U"-shaped limiting member 625 is located on both sides of the fixed pulley 624 axially, thereby limiting the polyimide strip 612. The limiting member 625 can be locked to the second frame 200 by screws or other locking devices.

[0060] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in one possible embodiment, the drive assembly 300 includes: a drive motor 310, a gear set 320, a lead screw, a slider 340, and a push-pull rod 350. The gear set 320 is connected to the output shaft of the drive motor 310, the lead screw 330 is connected to the gear set 320, and the gear set 320 can drive the lead screw 330 to rotate. The slider 340 is sleeved on the lead screw 330, and the lead screw 330 can drive the slider 340 to move. The push-pull rod 350 is connected to the slider 340, and the second frame 200 is connected to the push-pull rod 350.

[0061] The output shaft of the drive motor 310 is connected to the gear set 320, enabling the drive motor 310 to drive the gear set 320 to rotate. The gear set 320 is connected to the lead screw 330, thus the gear set 320 can drive the lead screw 330 to rotate. A slider 340 is fitted onto the lead screw 330, and when the lead screw 330 rotates, its rotation can be converted into linear motion of the slider 340. The push-pull rod 350 is connected to the second frame 200 and is connected to the slider 340. When the slider 340 moves along the lead screw 330, the slider 340 drives the push-pull rod 350 to move, thereby driving the second frame 200.

[0062] The ball screw 330 and slider 340 structure exhibits low motion resistance, requiring only a small amount of drive power to operate the slider 340. This simplifies the selection of a low-power motor, alleviating battery anxiety. The slider 340's movement is reversible, allowing for flexible movement of the second frame 200. The relative rolling motion between the slider 340 and the ball screw 330 results in minimal wear during operation, extending the lifespan of the drive assembly 300. The ball screw mechanism offers high motion precision, enabling adjustments to different screen sizes and facilitating various applications, further enhancing the user experience.

[0063] In one possible application, the push-pull rod 350 is locked to the slider 340 by a connecting pin 380.

[0064] In one possible application, the gear set 320 includes multiple gears. By rationally designing the number of gears, the transmission ratio between the motor and the lead screw 330 can be changed, thereby enabling the lead screw 330 to rotate smoothly.

[0065] like Figure 5 As shown, in one possible embodiment, the drive assembly 300 further includes a base housing 360 and a guide shaft 370. The base housing 360 is connected to the first frame 100, and the gear set 320, lead screw 330, and slider 340 are located within the base housing 360. The guide shaft 370 is connected to the base housing 360, and the rotation axis of the guide shaft 370 is arranged in the same direction as that of the lead screw 330. A portion of the slider 340 passes through the guide shaft 370.

[0066] Two guide shafts 370 are provided on both sides of the lead screw 330. When the slider 340 moves along the lead screw 330, the slider 340 can also slide relative to the guide shafts 370. The guide shafts 370 can ensure that the slider 340 will not rotate during the translation process, thus ensuring the stability of the slider 340's movement. This allows the flexible display screen 500 to unfold and close smoothly, reducing the risk of failure during the opening and closing process.

[0067] The lead screw 330, slider 340, gear set 320 and guide shaft 370 are all located inside the housing, making the drive assembly 300 an integrated component. The drive assembly 300 can be assembled as a whole into the first frame 100, which helps to improve the assembly convenience of the drive assembly 300 and the first frame 100.

[0068] In one possible application, the base shell 360 is locked to the first frame 100 by locking devices such as screws.

[0069] like Figure 9 As shown, in one possible embodiment, the second frame 200 includes a comb-shaped support portion 210. The first frame 100 includes a fixed support portion 110, which has a plurality of insertion slots 120. The comb-shaped support portion 210 is inserted into the plurality of insertion slots 120. The comb-shaped support portion 210 and the fixed support portion 110 are used to support the flexible display screen 500.

[0070] The second frame 200 includes a movable main body 230 and a comb-shaped support 210. The comb-shaped support 210 includes multiple support bars, with adjacent support bars spaced apart. The multiple support bars are connected to the movable main body 230. The first frame 100 includes a fixed main body 130 and a fixed support 110. The fixed support 110 is disposed on the fixed main body 130, and the fixed support 110 is machined with an insertion groove 120. The comb-shaped support 210 can be inserted into the insertion groove 120, that is, one support bar can be inserted into one insertion groove 120.

[0071] When the electronic device is in its retracted state, all or most of the comb-shaped support parts 210 are inserted into the insertion slot 120. The comb-shaped support parts 210 and the fixed support parts 110 are combined to form a complete support surface, which enables the comb-shaped support parts 210 and the fixed support parts 110 to support the flexible display screen 500, avoid the problem of the flexible display screen 500 sinking, and help improve the flatness of the flexible display screen 500.

[0072] When the electronic device is in the unfolded state, a portion of the comb-shaped support part 210 extends out of the insertion slot 120. At this time, the comb-shaped support part 210 and the fixed support part 110 can still support the flexible display screen 500.

[0073] By providing a comb-shaped support 210 and a fixed support 110 that can be plugged in, the components supporting the flexible display screen 500 on the second frame 200 and the first frame 100 will not interfere with each other during the movement of the second frame 200 relative to the first frame 100, and the flexible display screen 500 can obtain a stable support effect.

[0074] Combination Figure 5 , Figure 7 and Figure 8 As shown, in one possible embodiment, the push-pull rod 350 is provided with a plug-in part 351, and the second frame 200 is provided with a plug-in hole 220, and the plug-in part 351 is plugged into the plug-in hole 220.

[0075] A plug-in portion 351 is machined into the push-pull rod 350, and a plug-in hole 220 is machined into the second frame 200. When the drive assembly 300 needs to be connected to the second frame 200, the plug-in portion 351 only needs to be plugged into the plug-in hole 220. When the push-pull rod 350 moves, the plug-in portion 351 can drive the second frame 200 to move, thereby driving the second frame 200 to move relative to the first frame 100. The connection between the drive assembly 300 and the second frame 200 is achieved by plugging, which improves the assembly convenience of the drive assembly 300 and the second frame 200. Since there is no need for locking parts to lock the drive assembly 300 and the second frame 200, the number of parts can be reduced.

[0076] like Figure 9 As shown, in one possible embodiment, the push-pull rod 350 is part of the comb-shaped support portion 210.

[0077] The comb-shaped support 210 includes multiple support bars, and the push-pull rod 350 is part of the comb-shaped support 210. Therefore, one of the multiple support bars can be used as the push-pull rod 350, so that the comb-shaped support 210 can be directly locked to the slider 340.

[0078] In one possible application, a pin hole is provided on the comb-shaped support 210, and a connecting pin 380 is connected to the slider 340 after passing through the pin hole.

[0079] Combination Figure 7 , Figure 10 and Figure 11 As shown, in one possible embodiment, the reel assembly 400 includes a bearing 410, a rolling shaft 420, and a roller 430. The bearing 410 is rotatably connected to the second frame 200, the rolling shaft 420 is connected to the bearing 410, and the roller 430 is sleeved on the rolling shaft 420, rotating synchronously with the rolling shaft 420.

[0080] The rolling shaft 420 is connected to the bearing 410, and the rolling shaft 420 and the bearing 410 are interference-fitted, so that the inner ring of the rolling shaft 420 and the bearing 410 rotate synchronously. The roller 430 is sleeved on the rolling shaft 420, and the roller 430 and the rolling shaft 420 can also be connected by an interference fit, so that the roller 430 and the rolling shaft 420 rotate synchronously. Of course, in other embodiments, the roller 430 and the rolling shaft 420 can also be set as an integral structure.

[0081] During the unfolding or retraction of the flexible display screen 500, the flexible display screen 500 can bypass the roller 430. The roller 430 can reduce the resistance during the movement of the flexible display screen, allowing the flexible display screen 500 to be unfolded or retracted more smoothly on the ground, and reducing the risk of delamination failure of the flexible display screen 500.

[0082] In one possible application, the second frame 200 includes a movable main body portion 230 and a base 440, with the bearing 410 mounted within the base 440, which is locked to the movable main body portion 230 by screws or other locking devices. Therefore, the reel assembly 400 can be configured as an integrated structure, facilitating quick assembly of the reel assembly 400 to the movable main body portion 230.

[0083] like Figure 9 As shown, in one possible embodiment, the electronic device further includes: a first guide rail 710 and a second guide rail 720, the first guide rail 710 being disposed on the second frame 200, the second guide rail 720 being disposed on the first frame 100, and the first guide rail 710 and the second guide rail 720 being slidably connected.

[0084] A first guide rail 710 is provided on the second frame 200, and a second guide rail 720 is provided on the first frame 100. When the second frame 200 moves relative to the first frame 100, the first guide rail 710 can slide along the second guide rail 720. The first guide rail 710 and the second guide rail 720 cooperate with each other to guide the second frame 200, ensuring that the second frame 200 can slide in a fixed direction, so that the electronic device can be smoothly unfolded or retracted.

[0085] In one possible application, two first guide rails 710 and a second guide rail 720 are respectively provided at both ends along the length of the electronic device to avoid the second frame 200 from shifting and to further improve the sliding stability of the second frame 200.

[0086] like Figure 12 As shown, in one possible embodiment, the electronic device further includes a circuit board 730 and a battery 740. The circuit board 730 is fixed to the first frame 100, the battery 740 is fixed to the first frame 100, and the drive assembly 300 is located between the circuit board 730 and the battery 740.

[0087] The drive assembly 300 is located between the circuit board 730 and the battery 740, thus spacing the circuit board 730 and the battery 740 apart. During use, the battery 740 dissipates heat. By using the drive assembly 300 to separate the circuit board 730 and the battery 740, the impact of the heat generated by the battery 740 on the circuit board 730 can be reduced, improving the operational stability of the circuit board 730. Furthermore, the circuit board 730, drive assembly 300, and battery 740 can be tightly fitted together, which helps to reduce the thickness of the electronic device.

[0088] The flexible display screen 500 is laid flat on the surfaces of the comb-shaped support portion 210 and the fixed support portion 110 under the action of the roll assembly 400. When the flexible display screen 500 is retracted, it is hidden in the gap space between the second frame 200 and the battery 740 via the roll assembly 400.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic device, characterized in that, include: First frame; The second frame is slidably connected to the first frame so that the electronic device can switch between a retracted state and an extended state; The scroll assembly is rotatably connected to the second frame; A flexible display screen, wherein a first end of the flexible display screen is connected to the first frame, and a second end of the flexible display screen passes around the roll assembly; A spring assembly, one end of which is connected to the second end of the flexible display screen, and the other end of which is connected to the first frame; The spring coefficient of the spring assembly changes with temperature to keep the flexible display screen in a taut state; The spring assembly includes a shape memory spring, and the shape memory spring includes: A spring body, the first end of which is connected to the flexible display screen, the stiffness of which varies with temperature; A polyimide strip, wherein a first end of the polyimide strip is connected to a second end of the spring body; The spring assembly also includes: A pulley assembly is disposed in the first frame, and the pulley assembly is used to tension the shape memory spring; The pulley assembly includes: A rotating component, which is rotatable relative to the first frame; A fixed pulley is rotatably connected to the second frame, and the second end of the polyimide strip passes around the fixed pulley and is connected to the rotating component.

2. The electronic device according to claim 1, characterized in that, The spring assembly also includes: Conductive fibers are wound around the shape memory spring to heat the shape memory spring.

3. The electronic device according to claim 2, characterized in that, The pulley assembly also includes: A torsion spring is connected to the rotating component and the first frame, and the torsion spring is used to drive the rotating component to tension the shape memory spring.

4. The electronic device according to claim 3, characterized in that, The pulley assembly also includes: A limiting member is connected to the second frame. A portion of the limiting member is located at the axial end face of the fixed pulley. When the polyimide strip moves relative to the fixed pulley, the limiting member is used to limit the polyimide strip.

5. The electronic device according to any one of claims 1 to 4, characterized in that, The electronic device further includes: a driving component disposed on the first frame, the driving component being used to drive the second frame to move; The driving component includes: Drive motor; The gear set is connected to the output shaft of the drive motor; A lead screw is connected to the gear set, and the gear set can drive the lead screw to rotate; A slider is sleeved on the lead screw, and the lead screw can drive the slider to move. A push-pull rod is connected to the slider, and the second frame is connected to the push-pull rod.

6. The electronic device according to claim 5, characterized in that, The driving component also includes: The base shell is connected to the first frame, and the gear set, the lead screw and the slider are located inside the base shell; A guide shaft is connected to the base shell, and the guide shaft is arranged in the same direction as the rotation axis of the lead screw. A portion of the slider passes through the guide shaft.

7. The electronic device according to claim 5, characterized in that, The second frame includes: a comb-shaped support portion; The first frame includes a fixed support portion, which has multiple insertion slots. The comb-shaped support portion is inserted into the multiple insertion slots. The comb-shaped support portion and the fixed support portion are used to support the flexible display screen.

8. The electronic device according to claim 5, characterized in that, The push-pull rod is provided with a plug-in part, and the second frame is provided with a plug-in hole, and the plug-in part is inserted into the plug-in hole.

9. The electronic device according to claim 7, characterized in that, The push-pull rod is part of the comb-shaped support.

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