Electronic devices

Abstract

The present application discloses an electronic device, comprising: a first middle frame, a second middle frame, a bearing, a flexible display screen, and a tensioning assembly. The second middle frame is slidably connected to the first middle frame, and the bearing is rotatably connected to the second middle frame. The first end of the flexible display screen is connected to the first middle frame, and the second end of the flexible display screen bypasses the bearing. The tensioning assembly is arranged on the first middle frame, and the tensioning assembly is used to drive the second middle frame to move and tension the flexible display screen, and a part of the tensioning assembly is connected to the second end of the flexible display screen, and moves synchronously with the second end of the flexible display screen.

Description

Technical Field

[0001] The present application belongs to the technical field of folding devices, and specifically relates to an electronic device. Background Art

[0002] The curved screen mobile phone can realize the function of folding, thus meeting the user's needs for large and small screens in different scenarios.

[0003] In order to tension the flexible screen, a spring is usually used to pull the flexible screen. When the roll-up screen mobile phone suddenly stops during the switching process, the spring cannot stop expanding and contracting instantly, which can easily cause the flexible screen to loosen when hovering. Summary of the invention

[0004] The present application aims to provide an electronic device that at least solves the problem that the spring cannot stop expanding and contracting instantaneously, causing the flexible screen to loosen when hovering.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The present application provides an electronic device, including:

[0007] First middle frame;

[0008] A second middle frame, slidably connected to the first middle frame;

[0009] A bearing, rotatably connected to the second middle frame;

[0010] A flexible display screen, wherein a first end of the flexible display screen is connected to the first middle frame, and a second end of the flexible display screen is passed around the bearing;

[0011] The tensioning assembly is arranged on the first middle frame, and is used to drive the second middle frame to move and tension the flexible display screen. A part of the tensioning assembly is connected to the second end of the flexible display screen and moves synchronously with the second end of the flexible display screen.

[0012] In an embodiment of the present application, when the electronic device is in a retracted state or an expanded state, the tensioning assembly can tension the flexible display screen. During the movement of the flexible display screen, since a part of the tensioning assembly moves synchronously with the flexible display screen, the tensioning assembly can continuously tension the flexible display screen during the movement of the flexible display screen. When the flexible display screen stops moving, the tensioning assembly also stops moving, thereby realizing the function of synchronous tensioning. Regarding the method of using a spring to tension the flexible display screen in the related art, the spring is a fixed component and is easy to move under the action of inertia, while in this embodiment, a part of the tensioning assembly connected to the flexible display screen is a moving component, and a part of the tensioning assembly moves synchronously with the flexible display screen, which can solve the problem of the flexible display screen becoming loose when hovering in the middle. Moreover, by replacing the spring in the related art with a moving structure, the problem of fatigue failure caused by multiple expansion and closure can be avoided.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 1 is one of the structural schematic diagrams of the tensioning assembly according to an embodiment of the present application;

[0016] Figure 2 is a schematic structural diagram of a transmission part according to an embodiment of the present application;

[0017] Figure 3 This is one of the structural schematic diagrams of the tensioning assembly when the electronic device according to the embodiment of the present application is in a retracted state;

[0018] Figure 4 This is one of the structural schematic diagrams of the tensioning assembly when the electronic device according to the embodiment of the present application is in an unfolded state;

[0019] Figure 5 is one of the structural schematic diagrams of the electronic device in the collapsed state according to the embodiment of the present application;

[0020] Figure 6 is one of the structural schematic diagrams of an electronic device in an unfolded state according to an embodiment of the present application;

[0021] Figure 7 This is the second structural schematic diagram of the tensioning assembly according to the embodiment of the present application;

[0022] Figure 8 This is a third structural schematic diagram of a tensioning assembly according to an embodiment of the present application;

[0023] Fig. 9 This is a second structural schematic diagram of a tensioning assembly when the electronic device according to an embodiment of the present application is in a retracted state;

[0024] Fig.10 This is a second structural schematic diagram of a tensioning assembly when the electronic device according to an embodiment of the present application is in an unfolded state;

[0025] Fig.11 is a second structural schematic diagram of an electronic device in a retracted state according to an embodiment of the present application;

[0026] Fig.12 This is the second structural schematic diagram of the electronic device in the unfolded state according to the embodiment of the present application.

[0027] Reference numerals:

[0028] 100 first middle frame, 200 second middle frame, 300 bearing, 400 flexible display screen, 500 tensioning assembly, 510 transmission part, 511 track, 512 primary slide rail, 513 secondary slide rail, 514 fixed rack, 515 sliding rack, 516 slide rail body, 517 gear set, 518 first gear, 519 second gear, 520 first ball, 521 fixed slider, 522 guide rail, 523 second ball, 530 tensioning part, 531 first elastic member, 532 elastic body, 533 connecting member, 534 annular structure, 535 tensioning wheel, 536 tensioning belt, 537 elastic tensioning member, 538 wheel body, 539 second elastic member, 540 support rod. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0030] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Combine the following Figure 1-Figure 12 An electronic device according to an embodiment of the present application is described.

[0033] Combination Figure 1 , Figure 2 , Figure 5 , Figure 6 , Fig.11 and Fig.12 As shown, according to some embodiments of the present application, the electronic device includes: a first middle frame 100, a second middle frame 200, a bearing 300, a flexible display screen 400, and a tensioning assembly 500. The second middle frame 200 is slidably connected to the first middle frame 100, and the bearing 300 is rotatably connected to the second middle frame 200. The first end of the flexible display screen 400 is connected to the first middle frame 100, and the second end of the flexible display screen 400 bypasses the bearing 300. The tensioning assembly 500 is disposed on the first middle frame 100, and the tensioning assembly 500 is used to drive the second middle frame 200 to move and tension the flexible display screen 400. A portion of the tensioning assembly 500 is connected to the second end of the flexible display screen 400, and moves synchronously with the second end of the flexible display screen 400.

[0034] The first middle frame 100 is slidingly connected to the second middle frame 200. When the second middle frame 200 moves in a direction away from the first middle frame 100, the flexible display screen 400 gradually extends out of the second middle frame 200. When the second middle frame 200 moves in a direction close to the first middle frame 100, the flexible display screen 400 gradually retracts into the second middle frame 200, so that the electronic device can switch between a large screen and a small screen.

[0035] The tensioning assembly 500 is connected to the second middle frame 200, and the tensioning assembly 500 can drive the second middle frame 200 to move relative to the first middle frame 100. When the second middle frame 200 moves, since the flexible display screen 400 needs to extend or retract into the second middle frame 200, the flexible display screen 400 drives the bearing 300 to rotate, and the bearing 300 can reduce the friction force when the flexible display screen 400 moves. The tensioning assembly 500 can tension the flexible display screen 400 so that the flexible display screen 400 can maintain a flat state.

[0036] A portion of the tensioning assembly 500 is connected to the second end of the flexible display screen 400. When the flexible display screen 400 moves, a portion of the tensioning assembly 500 moves synchronously with the flexible display screen 400. Exemplarily, when the flexible display screen 400 extends out of the second middle frame 200, the second end of the flexible display screen 400 moves in a direction away from the first middle frame 100, and at this time, the second end of the flexible display screen 400 moves synchronously in a direction away from the first middle frame 100. When the electronic device is in a retracted state or an expanded state, the tensioning assembly 500 can tension the flexible display screen 400. During the movement of the flexible display screen 400, since a portion of the tensioning assembly 500 moves synchronously with the flexible display screen 400, the tensioning assembly 500 can continuously tension the flexible display screen 400 during the movement of the flexible display screen 400. When the flexible display screen 400 stops moving, the tensioning assembly 500 also stops moving, and the function of synchronous tensioning can be realized. In the related art, the spring is a fixed component that is easy to move under the action of inertia, while in this embodiment, a part of the tensioning assembly 500 connected to the flexible display screen 400 is a moving component, and a part of the tensioning assembly 500 moves synchronously with the flexible display screen 400, which can solve the problem of the flexible display screen 400 being loosened when suspended in the middle. Moreover, by replacing the spring in the related art with a moving structure, the problem of fatigue failure caused by multiple expansion and closure can be avoided.

[0037] Combination Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, in a possible embodiment, the tensioning assembly 500 includes: a driving part (not shown in the figure), a transmission part 510 and a tensioning part 530, the driving part is arranged on the first middle frame 100, the transmission part 510 is connected to the driving part and the second middle frame 200, and the tensioning part 530 is connected to the transmission part 510 and the second end of the flexible display screen 400, and is used to tension the flexible display screen 400.

[0038] The driving part is fixed on the first middle frame 100, and the driving part is connected to the transmission part 510, so the driving part can drive the transmission part 510 to move. The transmission part 510 is connected to the second middle frame 200, so that the transmission part 510 can drive the second middle frame 200 to move. The transmission part 510 is also connected to the tensioning part 530, and the tensioning part 530 is used to tension the flexible display screen 400. When the transmission part 510 drives the second middle frame 200 to move, the transmission part 510 can drive the tensioning part 530 to move.

[0039] Exemplarily, when the electronic device moves from a contracted state to an expanded state, the transmission part 510 drives the second middle frame 200 to move in a direction away from the first middle frame 100, and the transmission part 510 drives at least a part of the tensioning part 530 to also move in a direction away from the first middle frame 100, so that the tensioning part 530 and the flexible display screen 400 can move synchronously, and the tensioning part 530 can keep the flexible display screen 400 in a tensioned state to avoid the problem of the flexible display screen 400 loosening.

[0040] In this embodiment, the driving part, the transmission part 510 and the tensioning part 530 are combined into an integrated structure, so that the tensioning assembly 500 occupies a small space, can reduce the size of the electronic device in the Z-direction thickness direction, and is conducive to thinning the electronic device.

[0041] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in a possible embodiment, the transmission part 510 includes: a track 511, a primary slide rail 512 and a secondary slide rail 513. The track 511 is arranged on the first middle frame 100, the primary slide rail 512 is slidably connected to the track 511, the primary slide rail 512 is connected to the second middle frame 200, and the driving part is used to drive the primary slide rail 512 to move. The secondary slide rail 513 is slidably connected to the primary slide rail 512, the tensioning part 530 is connected to the secondary slide rail 513, the primary slide rail 512 is used to drive the secondary slide rail 513 to move, and the direction and speed of the secondary slide rail 513 moving relative to the primary slide rail 512 are the same as the direction and speed of the primary slide rail 512 moving relative to the track 511.

[0042] The track 511 is installed on the first middle frame 100, for example, the track 511 is locked to the first middle frame 100 by means of a locking member such as a screw. The primary slide rail 512 is arranged in the track 511, and the primary slide rail 512 can move along the track 511. The driving unit is connected to the primary slide rail 512, and the driving unit can drive the primary slide rail 512 to move. The track 511 guides the primary slide rail 512 to ensure that the primary slide rail 512 can move smoothly in a fixed direction. The primary slide rail 512 is also connected to the second middle frame 200, and under the driving action of the driving unit, the primary slide rail 512 can drive the second middle frame 200 to move.

[0043] The secondary slide rail 513 is arranged in the primary slide rail 512. The secondary slide rail 513 can move relative to the primary slide rail 512, and the primary slide rail 512 can drive the secondary slide rail 513 to move. The secondary slide rail 513 is connected to the second end of the flexible display screen 400, and the secondary slide rail 513 can move synchronously with the second end of the flexible display screen 400.

[0044] Taking the process of switching the electronic device from the contracted state to the expanded state as an example, when the second middle frame 200 moves away from the first middle frame 100, the second end of the flexible display screen 400 moves with the second middle frame 200, and as the electronic device is unfolded, the flexible display screen 400 is gradually unfolded, so the second end of the flexible display screen 400 will also move relative to the second middle frame 200. Therefore, if the distance that the second middle frame 200 moves relative to the first middle frame 100 is S, then the distance between the second end of the flexible display screen 400 and the first middle frame 100 is 2S.

[0045] The secondary slide rail 513 can move with the primary slide rail 512. If the distance moved by the primary slide rail 512 is S, the secondary slide rail 513 and the primary slide rail 512 will move the same distance synchronously. The primary slide rail 512 can also drive the secondary slide rail 513 to move, and the speed at which the secondary slide rail 513 moves relative to the primary slide rail 512 is the same as the speed at which the primary slide rail 512 moves relative to the track 511. Therefore, when the distance moved by the primary slide rail 512 is S, the distance moved by the secondary slide rail 513 is 2S.

[0046] In the same time, the moving distance of the secondary slide rail 513 is the same as the moving distance of the second end of the flexible display screen 400, so that the secondary slide rail 513, the tensioning part 530 and the second end of the flexible display screen 400 move synchronously. Therefore, the tensioning part 530 can pull the second end of the flexible display screen 400, so that the flexible display screen 400 can always be kept in a tensioned state. The tensioning part 530 is not easy to produce relative movement with the flexible display screen 400, thereby avoiding the problem of loosening of the flexible display screen 400.

[0047] The transmission is carried out through the slide rail structure, with high transmission efficiency, smooth transmission process and more reliable structure. Compared with the screw slider and spring tensioning device in the related technology, the tensioning assembly 500 in this embodiment has lower cost and is easy to implement.

[0048] In one possible application, the driving part can be a motor plus a ball screw structure, the motor is fixed on the first middle frame 100, the ball screw includes a screw and a sliding block, the screw is connected to the motor drive, the sliding block is set on the screw, and the sliding block is connected to the primary slide rail 512.

[0049] Combination Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, in a possible embodiment, the tensioning portion 530 includes: a first elastic member 531 , a first end of the first elastic member 531 is connected to the transmission portion 510 , and a second end of the first elastic member 531 is connected to a second end of the flexible display screen 400 .

[0050] Two ends of the first elastic member 531 are connected to the flexible display screen 400 and the secondary slide rail 513 respectively. The first elastic member 531 pulls the flexible display screen 400 through elastic force, so that the flexible display screen 400 is in a tensioned state.

[0051] When the second middle frame 200 moves, driven by the second middle frame 200, the second end of the flexible display screen 400 moves, and the primary slide rail 512 drives the secondary slide rail 513 to move. Therefore, the second end of the flexible display screen 400 moves synchronously with the secondary slide rail 513, so the first elastic member 531 basically does not undergo elastic deformation, and the first elastic member 531 moves synchronously with the second end of the flexible display screen 400. Therefore, when the electronic device is hovering, the first elastic member 531 is not easy to continue moving due to inertia, thereby avoiding the problem of loosening of the flexible display screen 400.

[0052] When the electronic device switches states, the flexible display screen 400 may undergo a small amount of deformation. The flexible display screen 400 is connected to the first elastic member 531 instead of directly connecting the flexible display screen 400 to the secondary slide rail 513. The first elastic member 531 is used to buffer the deformation of the flexible display screen 400, thereby avoiding the problem of the flexible display screen 400 being easily damaged by pulling when connected to rigid components.

[0053] Combination Figure 1 and Figure 5 As shown, in a possible embodiment, the first elastic member 531 includes an elastic body 532 and a connecting member 533 (in order to clearly express the structure of some components, Figure 6 The elastic body 532 and the connecting member 533 are hidden in the figure. The first end of the elastic body 532 is connected to the transmission part 510 , the second end of the elastic body 532 is an annular structure 534 , a part of the connecting member 533 passes through the annular structure 534 , and the connecting member 533 is connected to the flexible display screen 400 .

[0054] The first end of the elastic body 532 is connected to the secondary slide rail 513, and the second end of the elastic body 532 can be locked to the secondary slide rail 513 by means of fixing members such as screws and pins. The second end of the elastic body 532 is an annular structure 534, and the connecting member 533 is connected to the annular structure 534. The end of the elastic body 532 is set as the annular structure 534, and a part of the connecting member 533 passes through the annular structure 534, which can improve the connection stability between the elastic body 532 and the connecting member 533.

[0055] The connecting member 533 is connected to the second end of the flexible display screen 400, and the shape of the connecting member 533 can be reasonably set according to the installation requirements. For example, the connecting member 533 can be set to a plate-like structure, and the connecting member 533 of the plate-like structure has a large contact area with the flexible display screen 400, thereby improving the connection stability between the connecting member 533 and the flexible display screen 400. Exemplarily, the flexible display screen 400 can be locked to the connecting member 533 by a locking member such as a screw or a pin.

[0056] In a possible application, the elastic body 532 may be a tension spring.

[0057] Combination Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in a possible embodiment, a fixed rack 514 is provided on the track 511, a sliding rack 515 is provided on the secondary slide rail 513, and the primary slide rail 512 includes: a slide rail body 516 and a gear set 517, the gear set 517 is rotatably connected to the slide rail body 516, and the gear set 517 is meshed with the fixed rack 514 and the sliding rack 515.

[0058] A fixed rack 514 is provided on the track 511, and a gear set 517 is provided on the slide rail body 516. The gear set 517 meshes with the fixed rack 514. Since the position of the fixed rack 514 remains unchanged, the gear set 517 rotates when the slide rail body 516 slides along the track 511. A sliding rack 515 is provided on the secondary slide rail 513. The sliding rack 515 meshes with the gear set 517. The secondary slide rail 513 is in a sliding connection with the primary slide rail 512. When the gear set 517 rotates, the gear set 517 can drive the sliding rack 515 to move, so that the secondary slide rail 513 slides relative to the primary slide rail.

[0059] The rotation speed of the gear set 517 is associated with the speed at which the primary slide moves relative to the track 511, and the moving speed of the secondary slide rail 513 is associated with the rotation speed of the gear set 517. Therefore, the moving speed of the secondary slide rail 513 relative to the primary slide rail 512 is the same as the moving speed of the primary slide rail 512 relative to the track 511. In the same time, the distance moved by the secondary slide rail 513 is twice the distance moved by the primary slide rail 512. The secondary slide rail 513 can move synchronously with the second end of the flexible display screen 400, so that the tensioning portion 530 can stably tension the flexible display screen 400.

[0060] Of course, in other embodiments, a motor and a ball screw structure may also be installed on the primary slide rail 512 , and the sliding block in the ball screw is connected to the secondary slide rail 513 .

[0061] Combination Figure 3 , Figure 5 and Figure 6 As shown, in a possible embodiment, the gear set 517 includes: at least two first gears 518 and a second gear 519. At least two first gears 518 are meshed with the fixed rack 514 and the sliding rack 515, the radius of the top circle of the first gear 518 is greater than the radius of the top circle of the second gear 519, and the second gear 519 is located between two adjacent first gears 518 and meshed with the two adjacent first gears 518.

[0062] There are at least two first gears 518, and both the fixed rack 514 and the sliding rack 515 are meshed with at least two first gears 518 and the fixed rack 514. By increasing the number of first gears 518, the meshing stability between the gear set 517 and the fixed rack 514 and the meshing stability between the gear set 517 and the sliding rack 515 can be improved, thereby improving the tensioning stability of the tensioning assembly 500 on the flexible display screen 400.

[0063] A second gear 519 is disposed between two adjacent first gears 518, and the fixed rack 514 and the sliding rack 515 are separated from the second gear 519. The second gear 519 meshes with the two adjacent first gears 518, and the second gear 519 transmits the transmission between the two adjacent first gears 518, so that the rotation directions of at least two second gears 519 are consistent, so that at least two first gears 518 can stably drive the sliding rack 515 to move.

[0064] like Figure 2 As shown, in a possible embodiment, the transmission part 510 further includes: a first ball 520 , and the first ball 520 is located between the track 511 and the primary slide rail 512 , and between the primary slide rail 512 and the secondary slide rail 513 .

[0065] A first ball bearing 520 is arranged between the track 511 and the primary slide rail 512. When the primary slide rail 512 slides relative to the track 511, the first ball bearing 520 can reduce the friction between the primary slide rail 512 and the track 511, which is beneficial to improving the movement stability of the primary slide rail 512 relative to the track 511. The driving unit can drive the primary slide rail 512 to move with a smaller driving force.

[0066] In a possible application, a first slide groove is provided on the side walls of the track 511, the primary slide rail 512, and the secondary slide rail 513, and the first ball 520 is located in the first slide groove. The first slide groove limits the first ball 520 to prevent the first ball 520 from being separated from the track 511 and the primary slide rail 512, and to prevent the first ball 520 from being separated from the primary slide rail 512 and the secondary slide rail 513.

[0067] A first ball bearing 520 is also provided between the primary slide rail 512 and the secondary slide rail 513. When the secondary slide rail 513 slides relative to the primary slide rail 512, the first ball bearing 520 can reduce the friction between the secondary slide rail 513 and the primary slide rail 512, which is beneficial to improving the movement stability of the secondary slide rail 513 relative to the primary slide rail 512.

[0068] Combination Figure 7 , Figure 8 , Fig.11 and Fig.12 As shown, in a possible embodiment, the transmission part 510 includes: a fixed slider 521 and a guide rail 522. The fixed slider 521 is arranged on the first middle frame 100, and the guide rail 522 is slidably connected to the fixed slider 521. The first end of the guide rail 522 is connected to the second middle frame 200, and the driving part is used to drive the guide rail 522 to move. The tensioning part 530 includes a tensioning wheel 535 and a tensioning belt 536. The tensioning wheel 535 is connected to the guide rail 522. The first end of the tensioning belt 536 is connected to the fixed slider 521. The second end of the tensioning belt 536 is connected to the second end of the flexible display screen 400 after passing the tensioning wheel 535 (in order to clearly express the structure of the tensioning belt 536, Fig.11 and Fig.12 As a schematic diagram, the flexible display screen 400 is not connected to the tensioning belt 536).

[0069] The fixed slider 521 is installed on the first middle frame 100, for example, the fixed slider 521 is locked to the first middle frame 100 by a locking member such as a screw. The guide rail 522 is slidably connected to the fixed slider 521, and the driving unit is connected to the guide rail 522. The driving unit can drive the guide rail 522 to move, and the fixed slider 521 guides the guide rail 522 to ensure that the guide rail 522 can move smoothly along a fixed direction.

[0070] The two ends of the tension belt 536 are respectively connected to the fixed slider 521 and the flexible display screen 400, and the second end of the tension belt 536 can move synchronously with the second end of the flexible display screen 400. The tension belt 536 bypasses the tension wheel 535, thereby reducing the resistance of the tension belt 536 during movement.

[0071] Taking the process of switching the electronic device from the contracted state to the expanded state as an example, when the second middle frame 200 moves away from the first middle frame 100, the second end of the flexible display screen 400 moves with the second middle frame 200, and as the electronic device is unfolded, the flexible display screen 400 is gradually unfolded, so the second end of the flexible display screen 400 will also move relative to the second middle frame 200. Therefore, if the distance that the second middle frame 200 moves relative to the first middle frame 100 is S, then the distance between the second end of the flexible display screen 400 and the first middle frame 100 is 2S.

[0072] Similarly, the second end of the tension belt 536 moves with the tension wheel 535, and the tension belt 536 also rotates relative to the tension wheel 535. In the same period of time, the length of rotation of the tension belt 536 relative to the tension wheel 535 is the same as the length of movement of the guide rail 522. Therefore, when the distance read by the guide rail 522 is S, the distance moved by the second end of the tension belt 536 is 2S.

[0073] In the same period of time, the distance moved by the second end of the tensioning band 536 is the same as the distance moved by the second end of the flexible display screen 400, so that the second end of the tensioning band 536 and the second end of the flexible display screen 400 move synchronously. Therefore, the tensioning band 536 can pull the second end of the flexible display screen 400, so that the flexible display screen 400 can always be kept in a tensioned state. The tensioning band 536 is not easy to produce relative movement with the flexible display screen 400, thereby avoiding the problem of loosening of the flexible display screen 400.

[0074] In a possible application, the driving part can be a motor plus a ball screw structure, the motor is fixed on the first middle frame 100, the ball screw includes a screw and a sliding block, the screw is connected to the motor drive, the sliding block is set on the screw, and the sliding block is connected to the guide rail 522.

[0075] Combination Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, in a possible embodiment, the tension wheel 535 includes an elastic tensioning member 537 and a wheel body 538. The elastic tensioning member 537 is connected to the guide rail 522, and the wheel body 538 is rotatably connected to the elastic tensioning member 537 and is located at the second end of the guide rail 522. The second end of the tensioning belt 536 passes around the tensioning wheel 535 and is connected to the second end of the flexible display screen 400. The elastic tensioning member 537 is used to tension the tensioning belt 536.

[0076] When the electronic device switches states, the flexible display screen 400 and the tensioning belt 536 may be slightly deformed. The tensioning belt 536 is tensioned by the elastic tensioning member 537 to prevent the tensioning belt 536 from loosening, thereby ensuring that the flexible display screen 400 will not loosen.

[0077] Furthermore, the tensioning portion 530 can also ensure that the problem of assembly difficulties caused by manufacturing tolerances is avoided.

[0078] Combination Fig. 9 and Fig.10As shown, in a possible embodiment, the guide rail 522 is provided with a mounting cavity, and the elastic tensioning member 537 includes: a second elastic member 539 and a support rod 540. The second elastic member 539 is located in the mounting cavity, and a first end of the second elastic member 539 is connected to the guide rail 522, a part of the support rod 540 is located in the mounting cavity, and the support rod 540 is connected to the second end of the elastic member, and the wheel body 538 is rotatably connected to the support rod 540.

[0079] The second elastic member 539 is arranged in the installation cavity, and the second elastic member 539 can push the support rod 540, so that the support rod 540 can drive the wheel body 538 to move, and the tensioning belt 536 is tensioned through the wheel body 538. The tensioning belt 536 is tensioned through the elastic structure to prevent the tensioning belt 536 and the flexible display screen 400 from being pulled and damaged due to deformation.

[0080] like Figure 8 As shown, in a possible embodiment, the transmission part 510 further includes: a second ball 523 , and the second ball 523 is located between the fixed slider 521 and the guide rail 522 .

[0081] A second ball bearing 523 is disposed between the slider and the guide rail 522. When the guide rail 522 slides relative to the slider, the first ball bearing 520 can reduce the friction between the guide rail 522 and the slider, which is beneficial to improving the movement stability of the guide rail 522 relative to the slider.

[0082] In a possible application, a second slide groove is provided on the side walls of the slider and the guide rail 522, and the second ball 523 is located in the second slide groove. The second slide groove limits the second ball 523 to prevent the second ball 523 from escaping from between the guide rail 522 and the slider.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electronic device, characterized in that: include: First middle frame; A second middle frame, slidably connected to the first middle frame; A bearing, rotatably connected to the second middle frame; A flexible display screen, wherein a first end of the flexible display screen is connected to the first middle frame, and a second end of the flexible display screen bypasses the bearing; A tensioning assembly, disposed on the first middle frame, the tensioning assembly is used to drive the second middle frame to move and tension the flexible display screen, a portion of the tensioning assembly is connected to the second end of the flexible display screen, and moves synchronously with the second end of the flexible display screen; The tensioning assembly comprises: A driving unit, arranged in the first middle frame; A transmission part, connected to the driving part and the second middle frame; A tensioning portion, connected to the transmission portion and the second end of the flexible display screen, and used for tensioning the flexible display screen; The transmission part comprises: A track, arranged on the first middle frame; A primary slide rail, slidably connected to the track, the primary slide rail is connected to the second middle frame, and the driving unit is used to drive the primary slide rail to move; The secondary slide rail is slidably connected to the primary slide rail, the tensioning part is connected to the secondary slide rail, the primary slide rail is used to drive the secondary slide rail to move, and the direction and speed of movement of the secondary slide rail relative to the primary slide rail are the same as the direction and speed of movement of the primary slide rail relative to the track.

2. The electronic device according to claim 1, characterized in that: The tensioning part includes: a first elastic member, a first end of the first elastic member is connected to the transmission part, and a second end of the first elastic member is connected to the second end of the flexible display screen.

3. The electronic device according to claim 2, characterized in that: The first elastic member comprises: An elastic body, wherein a first end of the elastic body is connected to the transmission part, and a second end of the elastic body is an annular structure; A connecting piece, a part of which passes through the annular structure, and the connecting piece is connected to the flexible display screen.

4. The electronic device according to claim 1, characterized in that: A fixed rack is provided on the track; The secondary slide rail is provided with a sliding rack; The primary slide rail comprises: a slide rail body and a gear set, the gear set is rotatably connected to the slide rail body, and the gear set is meshed with the fixed rack and the sliding rack.

5. The electronic device according to claim 4, characterized in that: The gear set comprises: At least two first gears meshing with the fixed rack and the sliding rack; The second gear, the radius of the tooth top circle of the first gear is greater than the radius of the tooth top circle of the second gear, and the second gear is located between two adjacent first gears and meshes with two adjacent first gears.

6. The electronic device according to claim 1, characterized in that: The transmission unit also includes: The first ball bearing is located between the track and the primary slide rail, and between the primary slide rail and the secondary slide rail.

7. The electronic device according to claim 1, characterized in that: The transmission part comprises: A fixed slider, arranged on the first middle frame; A guide rail is slidably connected to the fixed slider, a first end of the guide rail is connected to the second middle frame, and the driving unit is used to drive the guide rail to move; The tensioning portion comprises: A tensioning wheel connected to the guide rail; A tensioning belt, wherein a first end of the tensioning belt is connected to the fixed slider, and a second end of the tensioning belt is connected to the second end of the flexible display screen after passing around the tensioning wheel.

8. The electronic device according to claim 7, characterized in that: The tensioning wheel comprises: An elastic tensioning member connected to the guide rail; The wheel body is rotatably connected to the elastic tensioning member and is located at the second end of the guide rail. The second end of the tensioning belt is connected to the second end of the flexible display screen after passing around the tensioning wheel. The elastic tensioning member is used to tension the tensioning belt.

9. The electronic device according to claim 8, characterized in that: The guide rail is provided with a mounting cavity; The elastic tensioning member comprises: A second elastic member is located in the installation cavity, and a first end of the second elastic member is connected to the guide rail; A support rod, a portion of which is located in the mounting cavity, the support rod is connected to the second end of the elastic member, and the wheel body is rotatably connected to the support rod.

10. The electronic device according to any one of claims 7 to 9, characterized in that: The transmission unit also includes: The second ball is located between the fixed sliding block and the guide rail.

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