An electronic device

Abstract

The present application discloses an electronic device, which includes: a shell, a tensioning device, a flexible screen and a slider, the shell includes a first shell and a second shell which can be slidably connected, and the second shell is rotatably provided with a rotating shaft; the tensioning device includes a tensioning member and a stroke amplification mechanism, one end of the tensioning member is connected to one end of the stroke amplification mechanism; the first end of the flexible screen is connected to the first shell, the second end of the flexible screen bypasses the rotating shaft and is connected to the other end of the tensioning member, and the other end of the stroke amplification mechanism is connected to the first shell; the slider is slidably provided on the first shell, and the second shell and the stroke amplification mechanism are respectively connected to the slider; when the slider slides, the second shell slides relative to the first shell and drives the flexible screen to expand or retract, and the connected end of the stroke amplification mechanism and the tensioning member can move along with the second end of the flexible screen.

Description

Technical Field

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

[0002] With the rapid development of electronic technology, users have higher and higher requirements for mobile electronic communication devices. In pursuit of the ultimate experience of large screens and the convenience of carrying, roll-up screen mobile phones that can change the screen size at any time have emerged. The screen of the roll-up screen mobile phone can be freely expanded and retracted under the action of the driving device. In the related technology, the screen of the roll-up screen mobile phone is fixed at one end, and the other end is wrapped around the shaft and tensioned through the tensioning device, so that the screen is always in a tensioned state.

[0003] The current roll-up screen mobile phone uses a spring to tension the screen during the process of unfolding and retracting. As a result, the tension on the screen will gradually increase when it is unfolded. The power output of the drive motor will increase due to the increase in tension, resulting in increased motor noise and shorter battery life. When the screen is retracted, the tension will decrease, which may cause the screen to be in a relaxed state, affecting the screen display effect. The cyclic change between the screen's larger tension and smaller tension will not only affect the life of the motor, but will also cause the screen to fail due to fatigue, or even break. Summary of the invention

[0004] The present application aims to provide an electronic device that at least solves the problem that the screen of the current roll-up screen mobile phone is subjected to large changes in tension when it is unfolded and retracted, affecting the life and display effect of the screen and causing motor noise.

[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] The housing comprises a first housing and a second housing which are slidably connected, wherein the second housing is rotatably provided with a rotating shaft;

[0008] The tensioning device comprises a tensioning member and a stroke amplification mechanism, wherein one end of the tensioning member is connected to one end of the stroke amplification mechanism;

[0009] A flexible screen, wherein a first end of the flexible screen is connected to the first shell, a second end of the flexible screen bypasses the rotating shaft and is connected to the other end of the tensioning member, and the other end of the stroke amplification mechanism is connected to the first shell;

[0010] A slider is slidably disposed on the first housing, and the second housing and the stroke amplification mechanism are respectively connected to the slider;

[0011] When the slider slides, the second shell slides relative to the first shell and drives the flexible screen to expand or retract, and the connected end of the stroke amplification mechanism and the tensioning member can move along with the second end of the flexible screen.

[0012] According to an electronic device proposed in the present application, the moving distance of the connected end of the stroke amplification mechanism and the tensioning member is equal to the moving distance of the second end of the flexible screen.

[0013] According to an electronic device proposed in the present application, the stroke amplification mechanism is a scissors-type mechanism, and the two ends of the scissors-type mechanism in the extension and retraction direction are respectively connected to the second end of the flexible screen and the stroke amplification mechanism, and the hinge point between the two ends of the scissors-type mechanism is connected to the slider.

[0014] According to an electronic device proposed in the present application, the scissor mechanism includes: two first connecting rods and four second connecting rods, the length of the first connecting rod is twice the length of the second connecting rod, and the middle positions of the two first connecting rods are hinged to each other;

[0015] One end of the four second connecting rods is hinged to the two ends of the two first connecting rods in a one-to-one correspondence, the other ends of the two second connecting rods corresponding to one end of the first connecting rod are hinged to the same point of the tensioning member, and the other ends of the two second connecting rods corresponding to the other end of the first connecting rod are hinged to the same point of the first shell.

[0016] According to an electronic device proposed in the present application, the plane where the scissor mechanism is located is arranged parallel to the unfolded part of the flexible screen.

[0017] According to an electronic device proposed in the present application, the stroke amplification mechanism includes a first rack and a gear, the gear is rotatably connected to the slider, the first rack is meshed with one side of the gear, the first rack is connected to the tensioning member and can slide relative to the first shell under the action of the gear.

[0018] According to an electronic device proposed in the present application, the stroke amplification mechanism further includes a second rack, which is fixedly connected to the first housing and meshes with the other side of the gear.

[0019] According to an electronic device proposed in the present application, the first rack and the gear are arranged in the width direction of the flexible screen.

[0020] According to an electronic device proposed in the present application, the tensioning member is an elastic member, two ends of the elastic member are respectively connected to the second end of the flexible screen and the stroke amplification mechanism, and the flexible screen is tensioned under the action of the elastic member;

[0021] Alternatively, the tensioning member includes a first magnet and a second magnet, the first magnet is connected to the second end of the flexible screen, the second magnet is connected to the stroke amplification mechanism, and the first magnet and the second magnet have opposite magnetic properties.

[0022] According to an electronic device proposed in the present application, the elastic member is a spring.

[0023] An electronic device proposed in the present application further includes: a motor fixed to the first shell, and the slider is connected to the motor through a screw rod.

[0024] According to an electronic device proposed in the present application, the second shell includes a middle frame and a support member, the middle frame and the first shell are slidably connected, the rotating shaft is rotatably arranged on the middle frame, the support member is fixedly connected to the middle frame, the flexible screen is supported on the support member, and the slider is connected to the support member.

[0025] In the embodiment of the present application, a travel amplification mechanism is provided in the tensioning device, the first end of the tensioning member is connected to the flexible screen, and the second end of the tensioning member is connected to the fixed first shell through the travel amplification mechanism, so that when the slider pushes the second shell to move to unfold or retract the flexible screen, the travel amplification mechanism can drive the second end of the tensioning member to move, so that the second end of the tensioning member can move with the first end, thereby reducing the change of the tensioning force on the flexible screen and reducing the risk of fatigue failure of the flexible screen. It can avoid the motor from generating loud noise due to excessive output power during the unfolding of the flexible screen; it can avoid the flexible screen from wrinkling due to being in a relaxed state during the retraction process, and ensure the display effect of the screen.

[0026] 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

[0027] 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:

[0028] Figure 1 is a schematic diagram of an electronic device according to an embodiment of the present application when the flexible screen is in a retracted state;

[0029] Figure 2 is a schematic diagram of an electronic device according to an embodiment of the present application when the flexible screen is in an unfolded state;

[0030] Figure 3 is one of the cross-sectional views of the flexible screen in the electronic device in the unfolded state according to an embodiment of the present application;

[0031] Figure 4is one of the cross-sectional views of the flexible screen in the electronic device in the retracted state according to an embodiment of the present application;

[0032] Figure 5 is a second cross-sectional view of the flexible screen in the electronic device in the unfolded state according to an embodiment of the present application;

[0033] Figure 6 is a second cross-sectional view of the flexible screen in the electronic device in the retracted state according to an embodiment of the present application;

[0034] Figure 7 is a schematic structural diagram of a scissor mechanism in an electronic device according to an embodiment of the present application;

[0035] Figure 8 is a third cross-sectional view of the flexible screen in the electronic device in the unfolded state according to an embodiment of the present application;

[0036] Fig. 9 is a third cross-sectional view of the flexible screen in the electronic device in the retracted state according to an embodiment of the present application;

[0037] Fig.10 is a structural schematic diagram of a rack and pinion transmission mechanism in an electronic device according to an embodiment of the present application;

[0038] Reference numerals:

[0039] 1. Shell; 11. First shell; 111. Connecting part; 112. Bracket; 12. Second shell; 121. Middle frame; 122. Support member; 2. Driving device; 21. Motor; 22. Slider; 221. First connecting part; 222. Second connecting part; 23. Screw rod; 3. Tensioning device; 31. Tensioning member; 311. First magnet; 312. Second magnet; 32. Stroke amplification mechanism; 321. First connecting rod; 322. Second connecting rod; 324. First rack; 323. Second rack; 325. Gear; 4. Flexible screen; 41. First end; 42. Second end; 5. Rotating shaft. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below, and 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.

[0041] The terms "first", "second", "third" and "third" 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 specified, "multiple" 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.

[0042] In the description of the present application, it should be understood that the terms "thickness", "left", "right", "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] 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 direct connection, or an indirect connection 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.

[0044] Combine the following Figure 1-Figure 10 An electronic device according to an embodiment of the present application is described.

[0045] An embodiment of the present application provides an electronic device, which may be a mobile phone, a tablet computer, a computer, a game console, or other electronic device with a rollable screen.

[0046] See also Figure 1-Figure 6 , Figure 8-Figure 9 The electronic device provided in the embodiment of the present application includes a housing 1, a slider 22, a tensioning device 3 and a flexible screen 4. The housing 1 includes a first housing 11 and a second housing 12 that are slidably connected, and a rotating shaft 5 is rotatably provided on the second housing 12. The tensioning device 3 includes a tensioning member 31 and a stroke amplification mechanism 32, and one end of the tensioning member 31 is connected to one end of the stroke amplification mechanism 32. The first end 41 of the flexible screen 4 is connected to the first housing 11, and the second end 42 of the flexible screen 4 is connected to the other end of the tensioning member 31 bypassing the rotating shaft 5. The other end of the stroke amplification mechanism 32 is connected to the first housing 11.

[0047] The slider 22 is slidably disposed on the first housing 11, and the second housing 12 and the stroke amplification mechanism 32 are respectively connected to the slider 22. When the slider 22 slides, the second housing 12 slides relative to the first housing 11 and drives the flexible screen 4 to expand or retract, and the end of the stroke amplification mechanism 32 connected to the tensioning member 31 can move along with the second end of the flexible screen 4.

[0048] Since the first end 41 of the flexible screen 4 is connected to the first shell 11, and the second end 42 bypasses the rotating shaft 5 and is connected to the first shell 11, when the slider 22 drives the second shell 12 to move in the first direction away from the first shell 11 relative to the first shell 11 to unfold the flexible screen 4, the distance of the second shell 12 away from the first shell 11 is S1, and the distance of the second end of the flexible screen 4 away from the first shell 11 is 2 times S1. When the slider 22 drives the second shell 12 to move in the second direction close to the first shell 11 relative to the first shell 11 to retract the flexible screen 4, the distance of the second shell 12 close to the first shell 11 is S2, and the distance of the second end of the flexible screen 4 close to the first shell 11 is 2 times S2. That is, the moving distance of the second end of the flexible screen 4 is twice the moving distance of the second shell 12. It can be understood that when the second shell 12 moves at a speed v, the moving speed of the second end of the flexible screen 4 is 2 times v.

[0049] The tensioning member 31 is used to be connected between the second end of the flexible screen 4 and the stroke amplification mechanism 32 to keep the flexible screen 4 in a tensioned state. The tensioning member 31 has a first end and a second end in its tensioning direction. The first end of the tensioning member 31 is connected to the flexible screen 4, and the second end of the tensioning member 31 is connected to the stroke amplification mechanism 32. Then the distance moved by the second end of the flexible screen 4 is the moving distance of the first end of the tensioning member 31; the moving distance of the connected end of the stroke amplification mechanism 32 and the tensioning member 31 is the moving distance of the second end of the tensioning member 31.

[0050] The electronic device proposed in the embodiment of the present application, by setting a stroke amplification mechanism 32 in the tensioning device 3, the first end of the tensioning member 31 is connected to the flexible screen 4, and the second end of the tensioning member 31 is connected to the fixed first shell 11 through the stroke amplification mechanism 32, so that the slider 22 pushes the second shell 12 to move to unfold or retract the flexible screen 4, and the second end of the tensioning member 31 can be driven to move by the stroke amplification mechanism 32, so that the second end of the tensioning member 31 can move with its first end, thereby reducing the change of the tensioning force on the flexible screen 4 and reducing the risk of fatigue failure of the flexible screen 4. It can avoid the motor from generating a large noise due to excessive output power during the unfolding process of the flexible screen 4; it can avoid the flexible screen 4 from wrinkling due to being in a relaxed state during the retraction process, and ensure the display effect of the screen.

[0051] Furthermore, the moving distance of the end where the stroke amplification mechanism 32 is connected to the tensioning member 31 is equal to the moving distance of the second end of the flexible screen 4. That is, the moving distance of the second end of the tensioning member 31 is twice the moving distance of the slider 22. It can be understood that the moving speed of the second end of the tensioning member 31 is twice the moving speed of the slider 22. In this way, the two ends of the tensioning member 31 always remain relatively still, and the tensioning force of the tensioning member 31 on the flexible screen 4 remains unchanged, so that the tensioning member 31 provides a constant tensioning force for the flexible screen 4.

[0052] In some embodiments of the present application, the tensioning member 31 is an elastic member, and the two ends of the elastic member are respectively connected to the second end of the flexible screen 4 and the stroke amplification mechanism 32, and the flexible screen 4 is tensioned under the action of the elastic member. The elastic member can be an object that can provide tension, such as a spring, an elastic rope or a rubber band. Under the action of the stroke amplification mechanism 32, the expansion and contraction amount of the elastic member is limited within a certain range.

[0053] When the moving distance of the connecting end of the stroke amplification mechanism 32 and the tensioning member 31 is equal to the moving distance of the second end of the flexible screen 4, the length of the spring remains unchanged during the process of unfolding and retracting the flexible screen 4. The tension on the second end of the flexible screen 4 is a constant value F=kx, where k is the elastic coefficient of the spring and x is the elongation of the spring.

[0054] In some other embodiments of the present application, the tensioning member 31 includes a first magnet 311 and a second magnet 312. The first magnet 311 is connected to the second end of the flexible screen 4, and the second magnet 312 is connected to the stroke amplification mechanism 32. The first magnet 311 and the second magnet 312 have opposite magnetic properties. Under the action of the stroke amplification mechanism 32, the moving distance of the second magnet 312 relative to the first housing 11 is greater than the moving distance of the slider 22 relative to the first housing 11.

[0055] When the moving distance of the connected end of the stroke amplification mechanism 32 and the tensioning member 31 is equal to the moving distance of the second end of the flexible screen 4, during the unfolding and retracting process of the flexible screen 4, the relative distance between the first magnet 311 and the second magnet 312 remains unchanged, the magnetic attraction between the two remains unchanged, and the tensioning force received by the flexible screen 4 is constant.

[0056] like Figure 3-Figure 6 As shown, in some embodiments of the present application, the stroke amplification mechanism 32 is a scissor mechanism. The two ends of the scissor mechanism in the telescopic direction are respectively connected to the second end of the flexible screen 4 and the stroke amplification mechanism 32. The hinge point between the two ends of the scissor mechanism is connected to the slider 22.

[0057] In this embodiment, the moving distance of the slider 22 is enlarged by the scissor-type mechanism, so that the moving distance of the connecting end of the tensioning member 31 and the scissor-type mechanism is greater than the moving distance of the slider 22, thereby reducing the change in the tensioning force of the tensioning member 31.

[0058] Optionally, the stroke amplification mechanism 32 is a two-stage scissor mechanism. It can be understood that the two-stage scissor mechanism includes a first scissor unit and a second scissor unit, one end of the first scissor unit is connected to one end of the second scissor unit, the other end of the first scissor unit is connected to the tensioner 31, and the other end of the second scissor unit is connected to the first housing 11. Optionally, the first housing 11 is provided with a connecting portion 111, and the second scissor unit is connected to the connecting portion 111. The first scissor unit and the second scissor unit have the same structure, and are both formed by a plurality of connecting rods hinged to each other.

[0059] During the extension and retraction process of the scissor mechanism, the first scissor unit and the second scissor unit are extended and retracted synchronously, and the extension length of the first scissor unit is equal to the extension length of the second scissor unit. The hinge point of the scissor mechanism on the center line perpendicular to the extension direction thereof is the connection point of the first scissor unit and the second scissor unit.

[0060] When the slider 22 moves a distance S in the first direction, the first scissor unit and the second scissor unit are synchronously extended by a length S, and the scissor mechanism as a whole is extended by 2S. Since the second scissor unit is connected to the first housing 11, the end where the tensioning member 31 is connected to the scissor mechanism moves a distance of 2S in the direction away from the first housing 11. At the same time, the second end of the flexible screen 4 moves a distance of 2S in the direction away from the first housing 11, the length of the tensioning member 31 remains unchanged, and the tensioning force on the flexible screen 4 remains unchanged.

[0061] When the slider 22 moves a distance S in the second direction, the first scissor unit and the second scissor unit are simultaneously shortened by a length S, and the scissor mechanism as a whole is shortened by 2S. Since the second scissor unit is connected to the first housing 11, the end where the tensioning member 31 is connected to the scissor mechanism moves a distance of 2S toward the first housing 11. At the same time, the second end of the flexible screen 4 moves a distance of 2S toward the first housing 11, and the two ends of the tensioning member 31 remain relatively still, and the tensioning force on the flexible screen 4 remains unchanged.

[0062] Among them, a variety of secondary scissor-fork mechanisms can achieve a 2-fold increase in the travel of the slider 22. In one embodiment, Figure 7 As shown, the scissor mechanism includes two first connecting rods 321 and four second connecting rods 322. The length of the first connecting rod 321 is twice the length of the second connecting rod 322. The middle positions of the two first connecting rods 321 are hinged to each other. One end of the four second connecting rods 322 is hinged to the two ends of the two first connecting rods 321 in a one-to-one correspondence. The other ends of the two second connecting rods 322 corresponding to one end of the first connecting rod 321 are hinged to the same point of the tensioning member 31, and the other ends of the two second connecting rods 322 corresponding to the other end of the first connecting rod 321 are hinged to the same point of the first housing 11.

[0063] It can be understood that the middle positions of the two first connecting rods 321 are hinged. One end of the two second connecting rods 322 is hinged, and the other end is hinged with the first end of the two first connecting rods 321 in a one-to-one correspondence, forming a parallelogram-shaped first scissor-fork unit; one end of the other two second connecting rods 322 is hinged, and the other end is hinged with the second end of the two first connecting rods 321 in a one-to-one correspondence, forming another parallelogram-shaped second scissor-fork unit.

[0064] The slider 22 is hinged to the hinge point of the two first connecting rods 321. When the slider 22 drives the hinge point to move a distance S, the first scissor unit and the second scissor unit are synchronously extended or shortened by a length S, the total length of the scissor mechanism is extended or shortened by 2S, the second end of the flexible screen 4 is synchronously moved by a distance of 2S, the length of the tensioning member 31 remains unchanged, and the tensioning force on the flexible screen 4 remains unchanged. The scissor mechanism structure of this embodiment is simpler and easier to implement.

[0065] In another embodiment, the scissors-fork mechanism includes four first links 321, wherein the middle positions of two first links 321 are hinged to form an X-shaped first scissors-fork unit, and the middle positions of the other two first links 321 are hinged to form another X-shaped second scissors-fork unit, and one end of the two first links 321 of the first scissors-fork unit and one end of the two first links 321 of the second scissors-fork unit are hinged in a one-to-one correspondence.

[0066] Among them, the tensioning member 31 is provided with a first guide member, the slider 22 is provided with a second guide member, and the first shell 11 is provided with a third guide member. The first guide member, the second guide member and the third guide member are parallel to each other and are arranged on the plane where the scissor mechanism is located along a direction perpendicular to the telescopic direction of the scissor mechanism. Two first connecting members are slidably provided on the first guide member, two second connecting members are slidably provided on the second guide member, and two third connecting members are slidably provided on the third guide member. The two first connecting rods 321 of the first scissor unit are hinged to the two first connecting members at one-to-one correspondence at one end away from the second scissor unit, the two hinge points of the first scissor unit and the second scissor unit are hinged to the two second connecting members at one-to-one correspondence, and the two first connecting rods 321 of the second scissor unit are hinged to the two third connecting rods at one end away from the first scissor unit.

[0067] When the slider 22 moves, the two second connectors move toward or away from each other along the second guide toward the center line of the scissor mechanism, and at the same time, the two first connectors move toward or away from each other along the first guide toward the center line of the scissor mechanism, and the two third connectors move toward or away from each other along the third guide toward the center line of the scissor mechanism. When the slider 22 drives the second guide to move a distance S, the first-stage scissor unit and the second-stage scissor unit synchronously extend or shorten by a length of S, and the total length of the scissor mechanism is extended or shortened by 2S. The second end of the flexible screen 4 synchronously moves a distance of 2S, so that the length of the tensioning member 31 remains unchanged, and the tensioning force on the flexible screen 4 remains unchanged.

[0068] In some embodiments of the present application, the plane where the scissor mechanism is located is arranged parallel to the unfolded part of the flexible screen 4. In the actual application of some electronic devices, such as a roll-up screen mobile phone, Figure 3-Figure 6 The plane where the scissor mechanism is located is perpendicular to the unfolded part of the flexible screen 4. If there is a need to reduce the thickness of the mobile phone, the plane where the scissor mechanism is located is set to be parallel to the unfolded part of the flexible screen 4, which is conducive to reducing the thickness of the rolled screen mobile phone. Among them, the plane where the scissor mechanism is located is the plane where each hinge point moves.

[0069] like Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the stroke amplification mechanism 32 includes a first rack 324 and a gear 325, and the gear 325 is rotatably connected to the slider 22. The first rack 324 is meshed with one side of the gear 325. The first rack 324 is connected to the tensioning member 31 and can slide relative to the first housing 11 under the action of the gear 325.

[0070] When the slider 22 slides in the first direction, the first rack 324 is synchronously driven to slide in the first direction through the gear 325; when the slider 22 slides in the second direction, the first rack 324 is synchronously driven to slide in the second direction through the gear 325, thereby achieving amplification of the stroke of the slider 22.

[0071] Specifically, the stroke amplification mechanism 32 further includes a second rack 323, which is fixedly connected to the first housing 11 and meshes with the other side of the gear 325. When the slider 22 slides relative to the first housing 11, the gear 325 is driven to mesh and move on the second rack 323. Since the second rack 323 is fixedly connected to the first housing 11, and the first rack 324 is slidably connected to the first housing 11, the gear 325 can synchronously drive the first rack 324 to move. It should be noted that the gear 325 can rotate under the action of the second rack 323, or can rotate under the drive of other independent driving members.

[0072] Alternatively, if Figure 3 As shown, a bracket 112 is disposed in the first housing 11 , and the slider 22 and the second rack 323 are respectively disposed on two opposite sides of the bracket 112 .

[0073] like Fig.10As shown, when the gear 325 moves to the left relative to the second rack 323 to unfold the screen, the gear 325 synchronously drives the first rack 324 to move to the left, and the distance that the first rack 324 moves to the left relative to the second rack 323 is equal to the distance that the gear 325 moves to the left, so that the distance that the second end of the tensioning member 31 moves to the left is twice the distance that the slider 22 moves to the left. The two ends of the tensioning member 31 remain relatively still, and the tensioning force on the flexible screen 4 during the unfolding process remains unchanged.

[0074] Similarly, when the driving gear 325 moves rightward relative to the second rack 323 to retract the screen, the gear 325 synchronously drives the first rack 324 to move rightward. The distance that the second end of the tensioning member 31 moves rightward is twice the distance that the slider 22 moves rightward. The two ends of the tensioning member 31 remain relatively still, and the tensioning force on the flexible screen 4 during the retraction process remains unchanged.

[0075] In some embodiments of the present application, the first rack 324 and the gear 325 are arranged in the width direction of the flexible screen 4. It can be understood that the first rack 324, the second rack 323 and the gear 325 are arranged in the width direction of the flexible screen 4. The plane where the first rack 324, the second rack 323 and the gear 325 are located is parallel to the unfolded part of the flexible screen 4.

[0076] In the actual application of some electronic devices, such as curved screen mobile phones, Figure 8 and Fig. 9 The first rack 324, the second rack 323 and the gear 325 shown in the figure are arranged in the thickness direction of the mobile phone. If there is a need to reduce the thickness of the mobile phone, the first rack 324, the second rack 323 and the gear 325 can be arranged in the width direction of the flexible screen 4, which is conducive to reducing the thickness of the curved screen mobile phone. Among them, the plane where the first rack 324, the second rack 323 and the gear 325 are located is parallel to the rotation plane of the gear 325.

[0077] The electronic device provided in some embodiments of the present application further includes a motor 21. The motor 21 is fixed to the first housing 11. The slider 22 is connected to the motor 21 through a screw rod 23.

[0078] Specifically, a guide rail is provided on the first housing 11, and the slider 22 can be slidably arranged on the guide rail. The slider 22 is threadedly connected to the screw rod 23. The slider 22 is also connected to the second housing 12 and the stroke amplification mechanism 32. Optionally, a first connecting portion 221 and a second connecting portion 222 are fixed to the slider 22, the second housing 12 is connected to the first connecting portion 221, and the stroke amplification mechanism 32 is connected to the second connecting portion 222.

[0079] When the motor 21 rotates forward, the slider 22 is driven by the screw rod 23 to move away from the first housing 11, and the slider 22 pushes the second housing 12 to move in the first direction relative to the first housing 11 to unfold the flexible screen 4. When the motor 21 rotates reversely, the slider 22 is driven by the screw rod 23 to move toward the first housing 11, and the slider 22 pulls the second housing 12 to move in the second direction relative to the first housing 11 to retract the flexible screen 4.

[0080] It is understandable that if Figure 3 As shown, a bracket 112 is provided in the first housing 11, the motor 21 is fixed on the bracket 112, and the slider 22 is slidably disposed on the bracket 112. One side of the slider 22 (such as its first connecting portion 221) is connected to the second housing 12, and the other side of the slider 22 (such as its second connecting portion 222) is connected to the stroke amplification mechanism 32. In this way, the slider 22, the first housing 11, the second housing 12, and the stroke amplification mechanism 32 can be arranged compactly.

[0081] like Figure 3 As shown, in some embodiments of the present application, the second shell 12 includes a middle frame 121 and a support member 122, and the middle frame 121 and the first shell 11 are slidably connected. The shaft 5 is rotatably set on the middle frame 121, the support member 122 is fixedly connected to the middle frame 121, the flexible screen 4 is supported on the support member 122, and the slider 22 is connected to the support member 122. The support member 122 is used to support the flexible screen 4, so that the flexible screen 4 maintains flatness and enables the unfolded flexible screen 4 to withstand a certain amount of pressing operation. The slider 22 described in the above embodiment is connected to the support member 122,

[0082] Optionally, the support member 122 is a comb-shaped support structure, which includes a plurality of plug-in parts arranged in parallel. The first shell 11 is provided with a plurality of plug-in slots, and the plurality of plug-in parts are plugged into the plurality of plug-in slots in a one-to-one correspondence. When the second shell 12 moves in a first direction relative to the first shell 11, the plug-in parts move to the outside of the plug-in slots. When the second shell 12 moves in a second direction relative to the first shell 11, the plug-in parts move to the inside of the plug-in slots.

[0083] In the description of this specification, the description with reference to the terms "some embodiments", "specific examples", "one embodiment", 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 can 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: The housing comprises a first housing and a second housing which are slidably connected, wherein the second housing is rotatably provided with a rotating shaft; The tensioning device comprises a tensioning member and a stroke amplification mechanism, wherein one end of the tensioning member is connected to one end of the stroke amplification mechanism; A flexible screen, wherein a first end of the flexible screen is connected to the first shell, a second end of the flexible screen bypasses the rotating shaft and is connected to the other end of the tensioning member, and the other end of the stroke amplification mechanism is connected to the first shell; A slider is slidably disposed on the first housing, and the second housing and the stroke amplification mechanism are respectively connected to the slider; When the slider slides, the second shell slides relative to the first shell and drives the flexible screen to expand or retract, and the connected end of the stroke amplification mechanism and the tensioning member can move along with the second end of the flexible screen, wherein the moving distance of the stroke amplification mechanism is greater than the moving distance of the second shell.

2. The electronic device according to claim 1, characterized in that: The moving distance of the connected end of the stroke amplification mechanism and the tensioning member is equal to the moving distance of the second end of the flexible screen.

3. The electronic device according to claim 1, characterized in that: The stroke amplification mechanism is a scissors-fork mechanism, and the two ends of the scissors-fork mechanism in the telescopic direction are respectively connected to the second end of the flexible screen and the first shell, and the hinge point between the two ends of the scissors-fork mechanism is connected to the slider.

4. The electronic device according to claim 3, characterized in that: The scissor-fork mechanism comprises: two first connecting rods and four second connecting rods, the length of the first connecting rod is twice the length of the second connecting rod, and the middle positions of two of the first connecting rods are hinged to each other; One end of the four second connecting rods is hinged to the two ends of the two first connecting rods in a one-to-one correspondence, the other ends of the two second connecting rods corresponding to one end of the first connecting rod are hinged to the same point of the tensioning member, and the other ends of the two second connecting rods corresponding to the other end of the first connecting rod are hinged to the same point of the first shell.

5. The electronic device according to claim 3, characterized in that: The plane where the scissor mechanism is located is arranged parallel to the unfolded part of the flexible screen.

6. The electronic device according to claim 1, characterized in that: The stroke amplification mechanism includes a first rack and a gear, the gear is rotatably connected to the slider, the first rack is meshed with one side of the gear, the first rack is connected to the tensioning member and can slide relative to the first housing under the action of the gear.

7. The electronic device according to claim 6, characterized in that: The stroke amplification mechanism also includes a second rack, which is fixedly connected to the first housing and meshes with the other side of the gear.

8. The electronic device according to claim 6, characterized in that: The first rack and the gear are arranged in a width direction of the flexible screen.

9. The electronic device according to claim 1, characterized in that: The tensioning member is an elastic member, and both ends of the elastic member are respectively connected to the second end of the flexible screen and the stroke amplification mechanism, and the flexible screen is tensioned under the action of the elastic member; Alternatively, the tensioning member includes a first magnet and a second magnet, the first magnet is connected to the second end of the flexible screen, the second magnet is connected to the stroke amplification mechanism, and the first magnet and the second magnet have opposite magnetic properties.

10. The electronic device according to claim 9, characterized in that: The elastic member is a spring.

11. The electronic device according to claim 1, characterized in that: Also includes: The motor is fixed to the first housing, and the slider is connected to the motor via a screw rod.

12. The electronic device according to claim 1, characterized in that: The second shell includes a middle frame and a support member, the middle frame and the first shell are slidably connected, the rotating shaft is rotatably set on the middle frame, the support member is fixedly connected to the middle frame, the flexible screen is supported on the support member, and the slider is connected to the support member.

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