Electronic device and its translation mechanism

Abstract

The application relates to an electronic device and a translation mechanism thereof. The electronic device comprises a shell assembly, a flexible screen and a translation mechanism. The shell assembly comprises a first shell and a second shell which are movably connected. The translation mechanism comprises a linkage and a first swing arm, a second swing arm, a third swing arm and a fourth swing arm which are movably connected with the linkage. During relative movement of the first shell and the second shell, the first swing arm and the second swing arm swing by equal angles in the same direction relative to the first shell, and the third swing arm and the fourth swing arm swing by equal angles in the same direction relative to the second shell. The swing direction of the first swing arm relative to the first shell is opposite to the swing direction of the third swing arm relative to the second shell. The electronic device and the translation mechanism thereof can avoid the flexible screen from being skewed in the direction perpendicular to the movement direction of the first shell and the second shell, so as to effectively improve the smoothness of the movement of the first shell and the second shell in the first direction and reduce the damage probability of the flexible screen.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to an electronic device and its translation mechanism. Background Technology

[0002] In today's intelligent information age, users are using mobile devices more and more frequently, and the usage scenarios are becoming increasingly diverse. Currently, most portable smart mobile devices have screen sizes of less than 7 inches. Compared with tablets and laptops, the screen display area is limited, thus restricting the user's operating experience.

[0003] The emergence of flexible screens has effectively solved this problem. By bending or rolling the screen, a large screen can be housed within a small body, making it easy for users to carry. At the same time, the small screen can be used as a normal phone, while when switched to a large screen, users can simultaneously read news and chat on social media, and it can also enhance the user's gaming experience, greatly enriching the user's usage scenarios.

[0004] However, current flexible screen structures still have many problems. For example, when flexible screens adjust the size of the display area by rolling, they are prone to tilting during the stretching or contraction process, which can easily cause wrinkles. This not only affects the smoothness of the stretching and contraction but also makes the flexible screen susceptible to damage. Summary of the Invention

[0005] This application provides an electronic device and its translation mechanism to solve the problem of skewing that easily occurs during the stretching or shrinking of flexible screens.

[0006] This application provides an electronic device, including:

[0007] The shell assembly includes a first shell and a second shell, which are movable and engaged along a first direction. The first shell is provided with a first connecting portion and a second connecting portion at intervals along a direction perpendicular to the first direction. The second shell is provided with a third connecting portion and a fourth connecting portion at intervals along a direction perpendicular to the first direction.

[0008] A flexible screen, connected to the first housing and the second housing, wherein at least a portion of the flexible screen's structure extends from or retracts from the housing assembly as the first housing and the second housing move relative to each other, such that the second housing has an extended position and a retracted position relative to the first housing; and

[0009] A translation mechanism includes a first swing arm, a second swing arm, a third swing arm, a fourth swing arm, and a linkage. The first and second swing arms are rotatably connected to the first and second connecting portions, respectively. The third and fourth swing arms are rotatably connected to the third and fourth connecting portions, respectively. The first, second, third, and fourth swing arms are linked together via the linkage. During the movement of the second housing between the unfolded position and the retracted position, the first and second swing arms swing at equal angles relative to the first housing in the same direction, and the third and fourth swing arms swing at equal angles relative to the second housing in the same direction. The swing direction of the first swing arm relative to the first housing is opposite to the swing direction of the third swing arm relative to the second housing.

[0010] On the other hand, this application provides a translation mechanism for connecting between a first housing and a second housing. The first housing and the second housing move and cooperate along a first direction. The first housing has a first connecting portion and a second connecting portion spaced apart along a direction perpendicular to the first direction. The second housing has a third connecting portion and a fourth connecting portion spaced apart along a direction perpendicular to the first direction. The translation mechanism includes a first swing arm, a second swing arm, a third swing arm, a fourth swing arm, and a linkage. The first swing arm and the second swing arm are rotatably connected to the first connecting portion and the second connecting portion, respectively. The third swing arm and the fourth swing arm are rotatably connected to the third connecting portion and the fourth connecting portion, respectively. The first swing arm, the second swing arm, the third swing arm, and the fourth swing arm are linked together through the linkage. During the relative movement of the first housing and the second housing, the first swing arm and the second swing arm swing at equal angles relative to the first housing in the same direction. The third swing arm and the fourth swing arm swing at equal angles relative to the second housing in the same direction. The swing direction of the first swing arm relative to the first housing is opposite to the swing direction of the third swing arm relative to the second housing.

[0011] In the aforementioned electronic device and its translation mechanism, during the relative movement of the first and second housings in a first direction, which causes a portion of the flexible screen structure to be extended from or contained within the housing assembly, the first and second swing arms of the translation mechanism swing at equal angles relative to the first housing in the same direction, and the third and fourth swing arms swing at equal angles relative to the second housing in the same direction. Furthermore, the swing direction of the first swing arm relative to the first housing is opposite to that of the third swing arm relative to the second housing. Thus, under the constraint of the translation mechanism, the first and second housings always translate along the first direction, preventing the flexible screen from tilting perpendicular to the first direction. This effectively improves the smoothness of movement of the first and second housings along the first direction and reduces the probability of damage to the flexible screen. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of an electronic device according to one embodiment, in which the second housing is in a folded position;

[0014] Figure 2 This is a partial cross-sectional view of the electronic device when its second housing is in the retracted position.

[0015] Figure 3 This is a schematic diagram of an electronic device according to one embodiment, with the second housing in the unfolded position.

[0016] Figure 4 This is a partial cross-sectional view of the electronic device's second housing when it is in the unfolded position.

[0017] Figure 5 A schematic diagram of a translation mechanism in an electronic device according to one embodiment, when the housing assembly is unfolded.

[0018] Figure 6 A three-dimensional structural schematic diagram of the translation mechanism of an electronic device according to one embodiment;

[0019] Figure 7 for Figure 6 An exploded view of the translation mechanism of the electronic device shown.

[0020] Figure 8 for Figure 6 A partial cross-sectional view of the translation mechanism of the electronic device shown.

[0021] Figure 9 for Figure 8 A partially enlarged schematic diagram of the structure of circle A;

[0022] Figure 10 This is an exploded view of an electronic device after some parts have been removed, according to one embodiment.

[0023] Figure 11 This is a partial cross-sectional view of the electronic device's second housing when it is in the unfolded position.

[0024] Figure 12 for Figure 11 A partially enlarged schematic diagram of the structure of circle B;

[0025] Figure 13 This is a schematic diagram of an electronic device according to another embodiment, in which the second housing is in the unfolded position;

[0026] Figure 14 for Figure 13 A schematic diagram of the translation mechanism of an electronic device is shown.

[0027] Figure 15 This is a schematic diagram of the translation mechanism of the electronic device when the second housing is in the retracted position.

[0028] Figure 16 This is a schematic diagram of the translation mechanism of an electronic device according to another embodiment;

[0029] Figure 17 This is a schematic diagram of an electronic device according to another embodiment, in which the second housing is in a folded position;

[0030] Figure 18 A schematic diagram of another embodiment of the translation mechanism of an electronic device;

[0031] Figure 19 for Figure 18 The diagram shown is a structural schematic of the translation mechanism in the electronic device when the second housing is in the retracted position;

[0032] Figure 20 This is a schematic diagram of an electronic device in another embodiment with the second housing in the unfolded position.

[0033] Figure 21 for Figure 20 The diagram shown corresponds to the second housing being in the folded position.

[0034] Figure 22 This is a schematic diagram of an electronic device in another embodiment with the second housing in the unfolded position.

[0035] Figure 23 This is a schematic diagram of an electronic device in another embodiment with the second housing in the unfolded position.

[0036] Figure 24 This is a schematic diagram of another embodiment of the electronic device with the second housing in the unfolded position;

[0037] Figure 25 for Figure 24 The diagram shown corresponds to the second housing being in the folded position.

[0038] Figure 26 A schematic diagram of the structure of an electronic device according to another embodiment;

[0039] Figure 27 for Figure 26 The diagram shows the structure of the translation mechanism of the electronic device.

[0040] Reference numerals: 100, electronic device; 10, shell assembly; 10a, receiving cavity; 10b, second buffer pad; 12, first shell; 122, first connecting part; 124, second connecting part; 14, second shell; 142, third connecting part; 144, fourth connecting part; 14a, rear cover; 16, third shell; 20, flexible screen; 20a, display interface; 202, fixed end; 204, free end; 30, traction member; 40 (40'), translation mechanism; 41, first swing arm; 41a, first rotation axis; 42, third swing arm; 42a, second rotation axis; 4 3. Second swing arm; 43a. Third rotation axis; 44. Fourth swing arm; 44a. Fourth rotation axis; 45. Linkage component; 45a. Pin hole; 45b. Pin; 45c. Receiving space; 45d. Clearance groove; 45e. Supporting wall; 45f. First buffer pad; 45g. Friction pad; 451. First hinge part; 452. Second hinge part; 453. Rotating connection part; L1. First straight line; α. First included angle; L2. Second straight line; β. Second included angle; 46. Rotating bearing; 46a. Inner ring; 46b. Outer ring; 47. First rotating component; 48. Second rotating component; 50. Drive mechanism; 51 (52) Output end. Detailed Implementation

[0041] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0042] As used herein, "electronic device" refers to, but is not limited to, a device capable of receiving and / or transmitting communication signals connected via any one or more of the following connection methods:

[0043] (1) Via wired connection, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, or direct cable connection;

[0044] (2) Via wireless interface, such as cellular network, wireless local area network (WLAN), digital television network such as DVB-H network, satellite network, AM-FM broadcast transmitter.

[0045] An electronic device configured to communicate via a wireless interface can be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0046] (1) Satellite phone or cellular phone;

[0047] (2) A Personal Communications System (PCS) terminal that can combine cellular radio telephone with data processing, fax and data communication capabilities;

[0048] (3) Radio telephone, pager, Internet / intranet access, web browser, notepad, calendar, personal digital assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0049] (4) Conventional above-knee and / or palm-sized receivers;

[0050] (5) Conventional knee-mounted and / or handheld wireless telephone transceivers, etc.

[0051] Please see Figure 1 and Figure 2 The electronic device 100 provided in this application embodiment can be a mobile phone or a tablet computer, and is not limited thereto.

[0052] The electronic device 100 includes a housing assembly 10 and a flexible screen 20. The housing assembly 10 forms a receiving cavity 10a, and the flexible screen 20 is connected to the housing assembly 10. The electronic device 100 may also include a circuit board (not shown) and a battery (not shown), both of which can be disposed within the receiving cavity 10a of the housing assembly 10. The circuit board may integrate the processor, power management module, storage unit, and baseband chip of the electronic device 100. The flexible screen 20 is communicatively connected to the processor, and the battery can power the flexible screen 20 and the electronic components on the circuit board. Of course, the electronic device 100 may also include a camera module (not shown), which is communicatively connected to the circuit board, and the battery can power the camera module. It is understood that the electronic device 100 of the embodiments of this application includes, but is not limited to, mobile phones, tablet computers, and other terminal devices or other portable electronic devices 100. In the embodiments of this application, a mobile phone is used as an example for description.

[0053] Combination Figure 3 and Figure 4 Therefore, the shell assembly 10 includes a first shell 12 and a second shell 14, which are capable of relative movement. Specifically, in this embodiment, the second shell 14 and the first shell 12 are slidably connected. In other words, the second shell 14 can slide relative to the first shell 12. For example, one of the first shell 12 and the second shell 14 may be provided with a slide rail, and the other can slide along the slide rail, so that the first shell 12 and the second shell 14 can extend and retract relative to each other, and the flexible screen 20 is connected to the first shell 12 and the second shell 14. As the first shell 12 and the second shell 14 move relative to each other, the flexible screen 20 extends from or retracts into the shell assembly 10 to adjust the unfolded length of the flexible screen 20.

[0054] Furthermore, the second housing 14 can slide relative to the first housing 12 to a folded position and an unfolded position. Combined with... Figure 1 and Figure 2 As shown, when the second housing 14 is in the folded position, the electronic device 100 has a relatively small size, making it easy to carry. Combined with Figure 3 and Figure 4 As shown, when the second housing 14 is in the unfolded position, the electronic device 100 can obtain a relatively large display area, thereby achieving a large-screen display visual experience and improving the user experience of the electronic device 100. Therefore, with this arrangement, the display area of ​​the flexible screen 20 (hereinafter referred to as the display interface 20a) can be adjusted by the relative sliding extension and retraction of the first housing 12 and the second housing 14.

[0055] It should be noted that the flexible screen 20, as a structural component of the electronic device 100 used for display or touch control, has a display area. This display area refers to the area corresponding to the flexible screen 20 when it displays the maximum image. In other words, during the relative sliding and extending process of the first housing 12 and the second housing 14, when the second housing 14 is in the extended position (i.e., when the display interface 20a is at its maximum), the display interface 20a is the same as the display area. Because a portion of the display area of ​​the flexible screen 20 is contained internally and not exposed during the relative sliding and extending process of the first housing 12 and the second housing 14, this portion does not display an image. The display interface 20a refers to the portion of the display area exposed outside the first housing 12 and the second housing 14. Subsequently, when the display interface 20a is lit or displays an image, the content displayed on the display interface 20a can be observed from outside the electronic device 100.

[0056] It is understood that in the embodiments described below, the terms "folded position," "expanded position," and similar expressions refer to the relative positions of the second housing 14 and the first housing 12. For the sake of simplicity, expressions such as "the second housing 14 is in the folded position" or "in the folded position" mean that the second housing 14 is in the folded position relative to the first housing 12, and expressions such as "the second housing 14 is in the unfolded position" or "in the unfolded position" mean that the second housing 14 is in the unfolded position relative to the first housing 12.

[0057] Combination Figure 2 and Figure 4 As shown, the flexible screen 20 may include a fixed end 202 and a free end 204 disposed opposite to each other. The fixed end 202 is disposed on the first housing 12 and its position is fixed relative to the first housing 12. When the second housing 14 is in the retracted position, the free end 204 of the flexible screen 20 is accommodated within the housing assembly 10, so that a portion of the structure of the flexible screen 20 is hidden within the housing assembly 10, and the portion of the flexible screen 20 hidden within the housing assembly 10 is not used for display. In other words, the movement of the first housing 12 relative to the second housing 14 can cause at least a portion of the free end 204 to unfold out of the second housing 14, or cause the free end 204 unfolded out of the second housing 14 to retract into the housing assembly 10.

[0058] It is understood that in the embodiments of this application, the relatively fixed position of the two objects means that the two objects cannot move relative to each other under normal circumstances. The two objects with relatively fixed positions can be physically directly connected, or they can be indirectly connected through an intermediate structure. Taking the fixed end 202 and the first housing 12 as an example, the relatively fixed position of the fixed end 202 and the first housing 12 can be achieved by the fixed end 202 being in direct contact with the first housing 12, for example, by using threaded fasteners or clamps to achieve direct fixation of the fixed end 202 and the first housing 12. Alternatively, the fixed end 202 can be indirectly fixed to the first housing 12 through structures such as an adhesive layer or an intermediate connecting plate.

[0059] It is understandable that the fixed end 202 and the free end 204 can be distinguished in the following manner, as shown in the reference. Figure 2 As shown, when the second housing 14 is in the folded position relative to the first housing 12, the portion of the flexible screen 20 exposed outside the housing assembly 10 is the fixed end 202 of the flexible screen 20, and the portion of the flexible screen 20 housed inside the housing assembly 10 can be considered the free end 204. In some embodiments, when the second housing 14 is in the folded position, the fixed end 202 exposed outside the housing assembly 10 is generally rectangular, and its size can be 4.5 inches to 7 inches, which is comparable to the size of a typical smartphone display screen, so that the electronic device 100 is easy to carry and use.

[0060] The relative movement of the first housing 12 and the second housing 14 of the electronic device 100 can be achieved manually or electronically.

[0061] For example, when using a manual method, the user only needs to hold the first housing 12 and the second housing 14 and move them away from each other to place the second housing 14 in the unfolded position. Correspondingly, when the second housing 14 is in the unfolded position, if it is necessary to close the electronic device 100, the user only needs to move the first housing 12 and the second housing 14 towards each other.

[0062] Combination Figure 2 and Figure 4 As shown, when using an electronic control method, a drive mechanism 50 can be provided inside the housing assembly 10 of the electronic device 100. Specifically, the drive mechanism 50 is provided inside the receiving cavity 10a of the housing assembly 10 and is used to drive the first housing 12 and the second housing 14 to move relative to each other, so that the second housing 14 drives the flexible screen 20 to be extended from or retracted from the housing assembly 10.

[0063] In some embodiments, the first housing 12 and the second housing 14 are connected to the drive mechanism 50 and move relative to each other under the drive of the drive mechanism 50. Specifically, the drive mechanism 50 has a fixed part and a movable part. When the drive mechanism 50 is working, the movable part can move relative to the fixed part. The fixed part is connected to the first housing 12, and the movable part is connected to the second housing 14 and is used to drive the second housing 14 to move relative to the first housing 12.

[0064] The second housing 14 may also include a rear cover 14a, which covers the free end 204 of the flexible screen 20 when in the unfolded position.

[0065] Furthermore, the back cover 14a can be provided with a light-transmitting area. When in the unfolded position, the portion of the flexible screen 20 housed in the shell assembly 10 can also be used for display, allowing the user to view the information displayed on the flexible screen 20 through the light-transmitting area, thereby expanding the usage scenarios of the electronic device 100. For example, in this embodiment, the electronic device 100 does not need to be equipped with a front-facing camera; a rear-facing camera module can be used to achieve functions such as selfies and video calls. The light-transmitting area can be made of transparent glass or formed by an opening in the back cover 14a. After the second shell 14 slides relative to the first shell 12 to the folded position, at least a portion of the flexible screen 20 housed in the shell assembly 10 is exposed. The exposed flexible screen 20 can be used for display, so that the electronic device 100 has a relatively large display area, thereby improving the user experience.

[0066] Continue reading Figure 4The electronic device 100 is equipped with a traction member 30, which is located at the end of the second housing 14 furthest from the first housing 12. During the process of the second housing 14 switching from an unfolded position to a retracted position relative to the first housing 12, the traction member 30 can guide the flexible screen 20 to deform and unfold within the second housing 14. When the second housing 14 is in the retracted position, the free end of the flexible screen 20 bypasses the traction member 30, which can limit the bending radius of the flexible screen 20 within a suitable range to avoid damage to the flexible screen 20 due to an excessively small bending radius. Of course, the traction member 30 can also prevent the flexible screen 20 from having an excessively large bending radius, which would result in an excessively large thickness of the electronic device 100.

[0067] In some embodiments, the traction member 30 may be a rotating shaft structure with protruding teeth, and the flexible screen 20 is linked with the traction member 30 through engagement or other means. When the second housing 14 slides relative to the first housing 12, the portion of the flexible screen 20 engaged with the traction member 30 is moved by the traction member 30 and is extended from or retracted into the housing assembly 10.

[0068] In other embodiments, the traction member 30 is a round shaft without teeth. During the transition of the second housing 14 from the retracted position to the unfolded position, the traction member 30 expands a portion of the flexible screen 20 that is attached to it, exposing more of the flexible screen 20 to the outside of the housing assembly 10 and placing it in a flat position. In this embodiment, the traction member 30 is rotatably mounted on the second housing 14. As the flexible screen 20 is gradually unfolded, the traction member 30 rotates with the movement of the flexible screen 20, thereby reducing the resistance experienced by the flexible screen 20 during unfolding and reducing wear at the contact points between the traction member 30 and the flexible screen 20.

[0069] In some embodiments, the traction member 30 may also be fixed to the second housing 14, and the traction member 30 has a smooth surface. During the unfolding of the flexible screen 20 into the second housing 14, the traction member 30 slidably contacts the flexible screen 20 through its smooth surface. In other words, in this embodiment, the traction member 30 may be integrally formed or welded to the second housing 14, and the traction member 30 may be considered as part of the second housing 14, with the free end 204 of the flexible screen 20 bypassing the end of the second housing 14 away from the first housing 12 and extending into the housing assembly 10.

[0070] During the process of the second housing 14 switching from the folded position to the unfolded position, the flexible screen 20 can be extended from the second housing 14 or retracted into the housing assembly 10 under the action of the traction member 30. It is understood that multiple intermediate positions can be set between the folded position and the unfolded position to achieve the positioning of the second housing 14 relative to the first housing 12 in multiple intermediate positions, and to make the flexible screen 20 have different display areas in different intermediate positions, thereby expanding the application scenarios of the electronic device 100.

[0071] The inventors discovered that during the relative movement of the first housing 12 and the second housing 14, the traction on both sides of the flexible screen 20 is often asynchronous, causing wrinkles to form on one side of the flexible screen 20. For example, during the unfolding of the flexible screen 20 from the housing assembly 10, if the moving speed of one side of the flexible screen 20 corresponding to the second housing 14 relative to the first housing 12 is faster than the moving speed of the other side of the flexible screen 20 corresponding to the second housing 14 relative to the first housing 12, the second housing 14 will cause the side of the flexible screen 20 with the faster unfolding speed to deviate from the preset movement direction of the first housing 12 and the second housing 14 (hereinafter referred to as the "first direction"). This causes the side of the flexible screen 20 with the slower unfolding speed to be squeezed and prone to wrinkles, resulting in a jamming phenomenon in the unfolding of the flexible screen 20 and affecting the subsequent unfolding stability of the flexible screen 20. Therefore, the inventors improved the electronic device 100 to avoid the skewed pushing force on the flexible screen 20 caused by the asynchronous movement of the first housing 12 and the second housing 14 along the first direction, which would cause the unfolding of the flexible screen 20 to become jammed, and proposed an electronic device 100 with stable movement.

[0072] Combination Figure 5 As shown, the electronic device 100 includes a translation mechanism 40, which includes a first swing arm 41, a second swing arm 42, a third swing arm 43, a fourth swing arm 44, and a linkage 45. For ease of understanding, the portions of the first housing 12 and the second housing 14 used for connecting with the four swing arms are referred to as connecting portions. Specifically, the first housing 12 has a first connecting portion 122 and a second connecting portion 124 spaced apart along a direction perpendicular to the first direction, and the second housing 14 has a third connecting portion 142 and a fourth connecting portion 144 spaced apart along a direction perpendicular to the first direction.

[0073] In this embodiment, the first swing arm 41 and the second swing arm 42 are rotatably connected to the first connecting portion 122 and the second connecting portion 124, respectively, and the third swing arm 43 and the fourth swing arm 44 are rotatably connected to the third connecting portion 142 and the fourth connecting portion 144, respectively. Since the first connecting portion 122 and the second connecting portion 124 are arranged at intervals in a direction perpendicular to the first direction—specifically, the line connecting the first connecting portion 122 and the second connecting portion 124 is perpendicular to the first direction—the line connecting the rotational positions of the first swing arm 41, the second swing arm 42, and the first housing 12 is perpendicular to the first direction. Correspondingly, the line connecting the rotational positions of the third swing arm 43, the fourth swing arm 44, and the second housing 14 is perpendicular to the first direction. It should be noted that the "connecting line" in this application refers to the line connecting the centroids of rotation of the two structural components.

[0074] Specifically, such as Figure 5As shown, the line connecting the first connecting portion 122 and the second connecting portion 124 defines the first straight line L1, and the line connecting the third connecting portion 142 and the fourth connecting portion 144 defines the second straight line L2. Both the first straight line L1 and the second straight line L2 are perpendicular to the first direction, thus keeping the first straight line L1 and the second straight line L2 parallel. Therefore, during the relative movement of the first housing 12 and the second housing 14, as long as the translation mechanism 40 can maintain the synchronous yaw motion of the first swing arm 41, the second swing arm 42, the third swing arm 43, and the fourth swing arm 44, the translational movement stability of the first housing 12 and the second housing 14 in the first direction can be maintained, so that the first housing 12 will not tilt relative to the second housing 14, effectively ensuring the smoothness of the extension or contraction of the flexible screen 20 relative to the shell assembly 10 and avoiding wrinkles.

[0075] Specifically, the first swing arm 41, the second swing arm 42, the third swing arm 43, and the fourth swing arm 44 are linked together by a linkage 45. During the movement of the second housing 14 between the extended and retracted positions, the first swing arm 41 and the second swing arm 42 swing relative to the first housing 12 in the same direction at equal angles, and the third swing arm 43 and the fourth swing arm 44 swing relative to the second housing 14 in the same direction at equal angles. The swing direction of the first swing arm 41 relative to the first housing 12 is opposite to that of the third swing arm 43 relative to the second housing 14. For example, when the first swing arm 41 rotates counterclockwise relative to the first housing 12, the third swing arm 43 rotates clockwise relative to the second housing 14. Correspondingly, when the first swing arm 41 rotates clockwise relative to the first housing 12, the third swing arm 43 rotates clockwise relative to the second housing 14.

[0076] By utilizing this translation mechanism 40, during the movement of the second housing 14 between the unfolded and retracted positions, the first housing 12 and the second housing 14 always maintain translational motion along the first direction. That is, along the first direction, the second housing 14 and the first housing 12 move at the same speed. This avoids the generation of a torsional force on the flexible screen 20 that would cause wrinkles to appear on the flexible screen 20. It effectively improves the stability of the flexible screen 20 during the process of unfolding and retracting from the housing assembly 10, thereby improving the overall operational stability of the electronic device 100.

[0077] Continue reading Figure 5As shown, a first straight line L1 is defined by the line connecting the first connecting portion 122 and the second connecting portion 124. The angles between the synchronously moving first swing arm 41 and the second swing arm 42 and the first straight line L1 are both the first included angle α. Correspondingly, a second straight line L2 is defined by the line connecting the third connecting portion 142 and the fourth connecting portion 144. The angles between the synchronously moving third swing arm 43 and the fourth swing arm 44 and the second straight line L2 are both the second included angle β. In some embodiments, during the movement of the second housing 14 between the unfolded position and the retracted position, the first included angle α and the second included angle β are always equal. In this way, the first housing 12 and the second housing 14 move in opposite directions at the same rate relative to the linkage 45, maintaining the stability of their translational movement along the first direction, so as to ensure that the flexible screen 20 can be smoothly extended from or retracted from the housing assembly 10.

[0078] It should be noted that the linkage component 45 allows for a variety of possible linkage configurations for the aforementioned four swing arms.

[0079] For example, combining Figure 5 and Figure 6 As shown, the first swing arm 41, the second swing arm 42, the third swing arm 43, and the fourth swing arm 44 are all independently connected to the linkage 45. More precisely, the connection between the swing arms and the linkage 45 is not through other swing arms. Taking the first swing arm 41 as an example, the first swing arm 41 is connected to the linkage 45, but no other swing arms are connected between the first swing arm 41 and the linkage 45. In this embodiment, both the first swing arm 41 and the second swing arm 42 have two rotating parts, and the distance between the two rotating parts of the first swing arm 41 is equal to the distance between the two rotating parts of the second swing arm 42. The two rotating parts of the first swing arm 41 are rotatably connected to the first connecting part 122 and the linkage 45, respectively, and the two rotating parts of the second swing arm 42 are rotatably connected to the second connecting part 124 and the linkage 45, respectively.

[0080] Both the third swing arm 43 and the fourth swing arm 44 have two rotating parts, and the distance between the two rotating parts of the third swing arm 43 is equal to the distance between the two rotating parts of the fourth swing arm 44. The two rotating parts of the third swing arm 43 are rotatably connected to the third connecting part 142 and the linkage member 45, respectively, and the two rotating parts of the fourth swing arm 44 are rotatably connected to the fourth connecting part 144 and the linkage member 45, respectively.

[0081] It should be noted that, in combination Figure 6 and Figure 7 As shown, the rotating connections of the above structures can be achieved using rotating bearings 46. The rolling balls of the rotating bearings 46 replace the sliding friction between the rotating structures with rolling friction, effectively reducing friction and making the rotation smoother. Moreover, the high dimensional accuracy of the rotating bearings 46 is beneficial to the synchronous movement stability of the swing arms of the translation mechanism 40.

[0082] The first rotation axis 41a of the first swing arm 41 relative to the linkage 45 is coaxial with the third rotation axis 43a of the third swing arm 43 relative to the linkage 45. Thus, the first swing arm 41 and the third swing arm 43 can be rotatably connected to the linkage 45 using the same set of rotating connecting parts. For example, combined with... Figure 7 As shown, the first swing arm 41 and the third swing arm 43 are rotatably connected to the linkage 45 through the rotating bearing 46. The linkage 45 has a pin hole 45a for inserting a pin 45b. The rotating bearing 46 on the first swing arm 41 and the third swing arm 43 are sleeved on the pin 45b, so that the first swing arm 41 and the third swing arm 43 rotate coaxially on the linkage 45.

[0083] Correspondingly, the second rotation axis 42a of the second swing arm 42 relative to the linkage 45 and the fourth rotation axis 44a of the fourth swing arm 44 relative to the linkage 45 can also be set to be coaxial, thereby realizing that the second swing arm 42 and the fourth swing arm 44 rotate coaxially with the linkage 45.

[0084] Understandably, when the first swing arm 41 and the third swing arm 43 rotate coaxially around the linkage 45, since the first swing arm 41 and the third swing arm 43 act on the linkage 45 at the same position, the force point of the linkage 45 is consistent during the relative movement of the first housing 12 and the second housing 14, so as to avoid generating torque as much as possible, thereby improving the overall structural stability of the translation mechanism 40. Correspondingly, the second swing arm 42 and the fourth swing arm 44 rotating coaxially around the linkage 45 can also improve the force situation of the linkage 45 and enhance the overall structural stability of the translation mechanism 40.

[0085] Furthermore, the distance between the two rotating parts of the first swing arm 41 is equal to the distance between the two rotating parts of the third swing arm 43. The lines connecting the first connecting part 122 and the third connecting part 142, as well as the lines connecting the second connecting part 124 and the fourth connecting part 144, are all parallel to the first direction. In this way, the first swing arm 41 and the third swing arm 43 can swing synchronously relative to the linkage 45, thereby stabilizing the overall force on the linkage 45, so as to synchronously link the four swing arms to drive the first housing 12 and the second housing 14 to move relative to each other, thereby improving the translational stability of the first housing 12 and the second housing 14.

[0086] Combination Figure 8 As shown, the linkage 45 is provided with a receiving space 45c, thereby using the receiving space 45c to house the structural components of the electronic device 100, making the overall structure compact.

[0087] In some embodiments, at least one of the first swing arm 41, the second swing arm 42, the third swing arm 43, the fourth swing arm 44, and the linkage 45 is provided with a rotary bearing 46.

[0088] Furthermore, combined Figure 8 and Figure 9 As shown, the rotary bearing 46 has an inner ring 46a and an outer ring 46b, wherein the inner ring 46a protrudes beyond the outer ring 46b. Thus, the protruding inner ring 46a can be directly used as a connecting body to connect with the corresponding first housing 12 or second housing 14. Specifically, at least one of the first connecting portion 122, the second connecting portion 124, the third connecting portion 142, and the fourth connecting portion 144 is provided with a limiting boss or a limiting groove, which is used to mate with the inner ring 46a. For example, in some embodiments, combined with... Figures 10 to 12 As shown, the first connecting portion 122 of the first housing 12 is provided with a limiting groove 12a. The limiting groove 12a cooperates with the inner ring 46a of the rotating bearing 46 to rotatably connect the first swing arm 41 to the first connecting portion 122. With this structural configuration, no additional connecting structural components are required to complete the connection between the translation mechanism 40 and the first housing 12 and the second housing 14, effectively improving assembly efficiency. Moreover, the assembly method of the inner ring 46a of the rotating bearing 46 with the limiting boss or limiting groove 12a effectively ensures coaxial installation accuracy, thereby improving the translational motion accuracy of the translation mechanism 40 in the first direction during the movement of the first housing 12 and the second housing 14. This avoids the phenomenon of asynchronous movement of the first housing 12 and the second housing 14 on both sides in the first direction, thus reducing the probability of wrinkles appearing on the flexible screen 20.

[0089] After the inner ring 46a of the rotating bearing 46 is engaged with the limiting boss or limiting groove 12a, it can be locked and fixed by fasteners such as screws or bolts to improve the connection stability.

[0090] In some embodiments, the first swing arm 41 and the third swing arm 43 may also be rotatably connected to different positions of the linkage 45, and correspondingly, the second swing arm 42 and the fourth swing arm 44 may be rotatably connected to different positions of the linkage 45. For example, combined with Figure 13 and Figure 14 As shown, the linkage 45 is provided with four rotating connection parts 453, which are arranged at intervals perpendicular to the first direction and are rotatably connected to the first swing arm 41, the second swing arm 42, the third swing arm 43, and the fourth swing arm 44, respectively. In this way, the positions of the corresponding swing arms can be flexibly set to avoid other structural components of the electronic device 100.

[0091] Furthermore, the four rotating connecting parts 453 are arranged at intervals along a direction perpendicular to the first direction. More precisely, the four rotating connecting parts 453 are arranged along the same straight line perpendicular to the first direction in order to make full use of the swing stroke of the corresponding swing arm.

[0092] like Figure 14and Figure 15 As shown, the linkage 45 is provided with a clearance groove 45d. When the second housing 14 is in the retracted state, the corresponding swing arm is housed in the clearance groove 45d, so that the translation mechanism 40 is almost retracted into a slender rod shape, which occupies less space, improves the space utilization rate inside the electronic device 100, and is conducive to realizing the miniaturization of the electronic device 100 in this retracted state.

[0093] It should be noted that the clearance groove 45d is set on the rotation path of the corresponding first swing arm 41, second swing arm 42, third swing arm 43 or fourth swing arm 44 of the linkage 45, so as to provide the necessary clearance space for the corresponding swing arm.

[0094] Furthermore, the clearance groove 45d has a retaining wall 45e, which is used to contact the corresponding swing arm to limit the swing amplitude of the corresponding swing arm, thereby limiting the travel of the translation mechanism 40. Specifically, when the second housing 14 is in the retracted position, the swing arm (e.g., Figure 15 The first swing arm 41 and the second swing arm 42 shown are in contact with the corresponding abutment wall 45e, so that the translation mechanism 40 cannot continue to move, thereby limiting the relative position of the first housing 12 and the second housing 14 in the retracted position, thereby constraining the movement stroke of the first housing 12 and the second housing 14 to the retracted position.

[0095] In some embodiments, the lengths of the swing arms of the first swing arm 41 and the third swing arm 43 may be equal or unequal. The swing arm refers to the length of the arm that enables the torque to be applied between two objects during rotation. Taking the first swing arm 41 as an example, the length of the swing arm is the distance between the two rotating parts of the first swing arm 41. In this embodiment, the distance between the two rotating parts of the first swing arm 41 is greater than or less than the distance between the two rotating parts of the third swing arm 43. Therefore, when the second housing 14 is in the retracted position, while the shorter swing arm rotates to the folded state relative to the linkage 45, the longer swing arm can still be in the open state relative to the linkage 45, thus freeing up space for other structural components of the electronic device 100.

[0096] In some embodiments, only one of the first swing arm 41 and the third swing arm 43 is connected to the linkage member 45, and only one of the second swing arm 42 and the fourth swing arm 44 is connected to the linkage member 45. Specifically, the linkage member 45 connects between the first swing arm 41 and the second swing arm 42, achieving linkage between the first swing arm 41 and the second swing arm 42. Alternatively, the linkage member 45 connects between the second swing arm 42 and the fourth swing arm 44, achieving linkage between the second swing arm 42 and the fourth swing arm 44. Specifically, in conjunction with... Figure 16As shown, the translation mechanism 40 includes a first rotating member 47 and a second rotating member 48. A first swing arm 41 and a third swing arm 43 are rotatably connected to the first rotating member 47, and a second swing arm 42 and a fourth swing arm 44 are rotatably connected to the second rotating member 48. A linkage 45 fixes the relative positions of the first rotating member 47 and the second rotating member 48, and the line connecting the first rotating member 47 and the second rotating member 48 is parallel to the line connecting the first connecting portion 122 and the second connecting portion 124. Therefore, during the relative movement of the first housing 12 and the second housing 14, the first housing 12 and the second housing 14 maintain translational motion without skewing.

[0097] Furthermore, the linkage 45 has a first hinge portion 451 and a second hinge portion 452. The first hinge portion 451 is connected to the first swing arm 41, and the second hinge portion 452 is connected to the second swing arm 42. Alternatively, the first hinge portion 451 is connected to the third swing arm 43, and the second hinge portion 452 is connected to the fourth swing arm 44. With this structural arrangement, the first swing arm 41 and the second swing arm 42 maintain synchronous yaw motion, and because the linkage 45 fixes the relative positions of the first rotating member 47 and the second rotating member 48, the first rotating member 47 and the second rotating member 48 can respectively carry the third swing arm 43 and the fourth swing arm 44 in synchronous yaw motion. It is understood that in this embodiment, the line connecting the first rotating member 47 and the second rotating member 48 is always parallel to the line connecting the first hinge portion 451 and the second hinge portion 452, and both remain perpendicular to the first direction.

[0098] The first rotating member 47 and the second rotating member 48 can be rotating bearings or other structures such as rollers or bushings, which are not limited here.

[0099] It should be noted that in embodiments where the electronic device 100 includes a translation mechanism 40, the relative movement of the first housing 12 and the second housing 14 of the electronic device 100 can also be achieved manually or electronically.

[0100] In the case of electronic control, the drive mechanism 50 can directly drive the first housing 12 and the second housing 14 to move relative to each other, or it can indirectly drive the first housing 12 and the second housing 14 to move relative to each other through the translation mechanism 40. For example, in the embodiment where the drive mechanism 50 drives the first housing 12 and the second housing 14 to move relative to each other through the translation mechanism 40, the drive mechanism 50 is connected to the linkage member 45 and has an output end that moves relative to the linkage member 45. The output end is connected to the first swing arm 41, the second swing arm 42, the third swing arm 43, or the fourth swing arm 44. Since the first swing arm 41, the second swing arm 42, the third swing arm 43, and the fourth swing arm 44 are linked together through the linkage member 45, when the output end of the drive mechanism 50 drives any one of the first swing arm 41, the second swing arm 42, the third swing arm 43, or the fourth swing arm 44 to move, the other swing arms will also move together to achieve the relative movement of the first housing 12 and the second housing 14.

[0101] It should be noted that the drive mechanism 50 can be a belt drive structure, a gear drive structure, or a telescopic drive structure such as a cylinder. The structure of the drive mechanism 50 is not limited here, as long as it can drive the first housing 12 and the second housing 14 to move relative to each other to adjust the unfolded length of the flexible screen 20.

[0102] In an embodiment where the linkage 45 has a receiving space 45c, at least a portion of the structure of the drive mechanism 50 is received in the receiving space 45c, thereby making the internal structure of the electronic device 100 compact and improving space utilization.

[0103] In the translation mechanism 40, the linkage 45, the first swing arm 41, the second swing arm 42, the third swing arm 43 and the fourth swing arm 44 can be straight rods or other sheet-like structural components, as long as they can adapt to the relative movement of the first housing 12 and the second housing 14.

[0104] Because the components in the translation mechanism 40 are linked together during the relative movement of the first housing 12 and the second housing 14, the overall performance of the electronic device 100 can be made more stable by improving the structure of the translation mechanism 40.

[0105] For example, combining Figure 17As shown, the linkage 45 is provided with a first buffer pad 45f, and at least one of the first housing 12 and the second housing 14 is provided with a second buffer pad 10b. When the second housing 14 is in the folded position, the first buffer pad 45f and the second buffer pad 10b abut against each other, thereby buffering the impact force of the first housing 12 and the second housing 14 when they are in the corresponding folded position, reducing the vibration generated when folded to that position, so as to obtain a good user experience. Moreover, with this structural arrangement, even if the electronic device 100 is accidentally dropped when in the folded position, the first buffer pad 45f and the second buffer pad 10b can still play a buffering role, improving the drop resistance of the electronic device 100. The materials of the first buffer pad 45f and the second buffer pad 10b can be rubber, latex, EVA (Ethylene Vinyl Acetate), or EPS (Expanded Polystyrene Foam), etc.

[0106] For example, combining Figure 18 As shown, the linkage 45 is equipped with a friction pad 45g. The material of the friction pad 45g can be plastic, polymer foam material, or polyurethane microporous foam material; no limitation is made here. Figure 19 As shown, when the second housing 14 is in the folded position, the friction pad 45g contacts at least one of the first housing 12 and the second housing 14 to increase the contact friction force, so that the second housing 14 will not easily move relative to the first housing 12 when in the folded position. As a result, in this usage state, the first housing 12 and the second housing 14 of the electronic device 100 are not easy to become loose, so as to maintain a good user experience.

[0107] It should be noted that in the electronic device 100, the flexible screen 20 is not limited to having only one end that can be extended or retracted from the housing assembly 10. For example, in some embodiments, in the first direction, both ends of the flexible screen 20 can be selectively extended or retracted from the housing assembly 10. Specifically, one end of the flexible screen 20 is movably disposed on the first housing 12, and the other end is movably disposed on the second housing 14. With the relative movement of the first housing 12 and the second housing 14, both ends of the flexible screen 20 extend and retract relative to the first housing 12 and the second housing 14, respectively. With this structural arrangement, the flexible screen 20 can still provide a larger display area when the second housing 14 is in the extended position relative to the first housing 12, improving the user experience of large-screen display. When the second housing 14 is in the retracted position relative to the first housing 12, the flexible screen 20 can provide a smaller display area, meeting usage needs while improving the overall portability of the electronic device 100.

[0108] Combination Figure 20 and Figure 21 As shown, the electronic device 100 includes a third housing 16 connected to the second housing 14. The third housing 16 is disposed at one end of the second housing 14 facing away from the first housing 12, and the third housing 16 is movable relative to the second housing 14 in a first direction.

[0109] Understandably, at least a portion of the structure of the flexible screen 20 extends from or retracts into the shell assembly 10 as the second shell 14 and the third shell 16 move relative to each other. Specifically, the flexible screen 20 includes two free ends 204, which are respectively connected to the two ends of the fixed end 202 in a first direction. As the first shell 12 and the third shell 16 move relative to the second shell 14 in the first direction, the free ends 204 at both ends of the fixed end 202 extend from or retract into the shell assembly 10, thereby adjusting the size of the display interface 20a of the flexible screen 20.

[0110] Another set of translation mechanism 40' can also be set between the second housing 14 and the third housing 16 to improve the stability of the flexible screen 20 when unfolding. For details, please refer to the setting method of the translation mechanism 40 between the first housing 12 and the second housing 14.

[0111] It should be noted that the structure of the other translation mechanism 40' can be the same as or different from that of the translation mechanism 40, as long as the corresponding translation mechanisms 40 and 40' can play a good translation guiding effect so that the flexible screen 20 will not have wrinkles.

[0112] For example, in some implementations, combined Figure 22 As shown, in the electronic device 100, the structure of the other set of translation mechanisms 40' can be the same as the structure of the translation mechanism 40. For example, combined with... Figure 23 As shown, the other translation mechanism 40' is the structure after the translation mechanism 40 is flipped (i.e., flipped up and down) around the first direction. In other embodiments, combined with Figure 24 As shown, the other translation mechanism 40' is the structure after the translation mechanism 40 is flipped (i.e., flipped left and right) around the first direction.

[0113] The above is merely an example illustrating the installation of the electronic device 100, where the translation mechanism 40 is flipped or mirrored to form another set of translation mechanisms 40'. It does not limit the structure of the two sets of translation mechanisms 40, 40' to a mirrored or flipped structure. In some embodiments, the two sets of translation mechanisms 40, 40' may also adopt the methods described above (e.g., ...). Figure 5 , Figure 13 or Figure 16 Any structure or similar structure in () will be used. The structure of the two translation mechanisms 40 and 40' will not be described in detail here.

[0114] Furthermore, in an embodiment where the electronic device 100 includes a third housing 16 connected to the second housing 14, and another set of translation mechanisms 40' is provided between the second housing 14 and the third housing 16, the two sets of translation mechanisms 40, 40' can be linked together by a drive mechanism 50 having two output ends.

[0115] Specifically, in combination Figure 24 and Figure 25 As shown, the drive mechanism 50 has two output ends 51 and 52, which are respectively connected to the linkage 45 of the two sets of translation mechanisms 40 and 40'. Thus, the output ends 51 and 52 synchronously drive the linkage 45 of the two sets of translation mechanisms 40 and 40' to move closer or further away from each other, so that the two sets of translation mechanisms 40 and 40' drive the first housing 12 and the third housing 16 to move relative to the second housing 14.

[0116] In other embodiments, the two output terminals 51 and 52 are connected to the first housing 12 and the third housing 16 respectively, and can extend and retract relative to each other, thereby causing the first housing 12 and the third housing 16 to move closer to each other or further away from each other, ultimately achieving synchronous movement of the first housing 12 and the third housing 16 relative to the second housing 14. Similarly, the number of drive mechanisms 50 can be minimized to reduce the number of structures within the electronic device 100, thereby facilitating the overall thinner and lighter design of the electronic device 100.

[0117] Understandably, the two sets of translation mechanisms 40 and 40' can share the connecting portion located on the second housing 14; more precisely, the two sets of translation mechanisms 40 and 40' are rotatably connected to the second housing 14 at the same position. For example, in combination Figure 26 As shown, the third swing arm 43 of the translation mechanism 40 and the third swing arm 43 of the translation mechanism 40' are both rotatably connected to the third connecting part 142, and the fourth swing arm 44 of the translation mechanism 40 and the fourth swing arm 44 of the translation mechanism 40' are both rotatably connected to the fourth connecting part 144.

[0118] Furthermore, the swing arms of the common connecting part of the two sets of translation mechanisms 40 and 40' can be rotatably connected by a rotating component, for example... Figure 27 As shown, this allows the two sets of translation mechanisms 40 and 40' to be assembled into or disassembled from the electronic device 100 as a whole, thereby improving assembly efficiency and facilitating disassembly and maintenance.

[0119] In other embodiments, the two sets of translation mechanisms 40, 40' are connected to the second housing 14 at different positions, which is not limited here. As long as the movement of the first housing 12 relative to the second housing 14 and the movement of the third housing 16 relative to the second housing 14 can meet the needs of the flexible screen 20 of the electronic device 100 for unfolding and retracting.

[0120] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electronic device, comprising: The shell assembly comprises a first shell and a second shell, the first shell and the second shell are movably connected along a first direction, the first shell is provided with a first connecting part and a second connecting part at intervals along a direction perpendicular to the first direction, the second shell is provided with a third connecting part and a fourth connecting part at intervals along a direction perpendicular to the first direction; a flexible screen connected to the first shell and the second shell, at least part of the structure of the flexible screen is unfolded or folded into the shell assembly with the relative movement of the first shell and the second shell, so that the second shell has an unfolded position and a folded position relative to the first shell; and a translation mechanism, the translation mechanism comprises a first swing arm, a second swing arm, a third swing arm, a fourth swing arm and a linkage, the first swing arm and the second swing arm are respectively rotatably connected with the first connecting part and the second connecting part, the third swing arm and the fourth swing arm are respectively rotatably connected with the third connecting part and the fourth connecting part, the first swing arm, the second swing arm, the third swing arm and the fourth swing arm are connected through the linkage, during the movement of the second shell between the unfolded position and the folded position, the first swing arm and the second swing arm swing by equal angles in the same direction relative to the first shell, the third swing arm and the fourth swing arm swing by equal angles in the same direction relative to the second shell, the swinging direction of the first swing arm relative to the first shell is opposite to the swinging direction of the third swing arm relative to the second shell, the translation mechanism comprises a first rotating part and a second rotating part, the first swing arm and the third swing arm are rotatably connected to the first rotating part, the second swing arm and the fourth swing arm are rotatably connected to the second rotating part, the linkage fixes the relative position of the first rotating part and the second rotating part, and the line connecting the first rotating part and the second rotating part is parallel to the line connecting the first connecting part and the second connecting part; the linkage has a first hinge part and a second hinge part, the line connecting the first rotating part and the second rotating part is always parallel to the line connecting the first hinge part and the second hinge part, and both are perpendicular to the first direction; wherein the first hinge part is connected with the first swing arm, the second hinge part is connected with the second swing arm, or the first hinge part is connected with the third swing arm, and the second hinge part is connected with the fourth swing arm. the line connecting the first connecting part and the second connecting part defines a first straight line, the included angle of the first swing arm and the second swing arm relative to the first straight line is a first included angle, the line connecting the third connecting part and the fourth connecting part defines a second straight line, the included angle of the third swing arm and the fourth swing arm relative to the second straight line is a second included angle, during the movement of the second shell between the unfolded position and the folded position, the first included angle is always equal to the second included angle. ​ 2. The electronic device of claim 1, wherein, ​ 3. The electronic device of claim 1, wherein, At least one of the first swing arm, the second swing arm, the third swing arm, the fourth swing arm and the linkage is provided with a rotary bearing, an inner ring of the rotary bearing protrudes from an outer ring of the rotary bearing, at least one of the first connecting portion, the second connecting portion, the third connecting portion and the fourth connecting portion is provided with a limiting boss or a limiting groove, the limiting boss or the limiting groove is used for cooperating with the inner ring.

4. The electronic device of claim 1, wherein, The driving mechanism is arranged in the shell assembly and is used for driving the first shell and the second shell to move relative to each other.

5. The electronic device of claim 4, wherein, The driving mechanism is connected with the linkage and has an output end moving relative to the linkage, the output end is connected with the first swing arm, the second swing arm, the third swing arm or the fourth swing arm.

6. The electronic device of claim 5, wherein, The linkage is provided with a receiving space, at least part of the structure of the driving mechanism is received in the receiving space.

7. The electronic device of claim 5 or 6, wherein, The linkage is provided with a clearance groove corresponding to the rotary path of the first swing arm, the second swing arm, the third swing arm or the fourth swing arm, the clearance groove has a contact wall, the contact wall is used for contacting the corresponding swing arm to limit the swing amplitude of the corresponding swing arm.

8. The electronic device of claim 1, wherein, The linkage is provided with a first buffer pad, at least one of the first shell and the second shell is provided with a second buffer pad, when the second shell is in the folding position, the first buffer pad and the second buffer pad abut each other.

9. The electronic device of claim 1, wherein, The linkage is provided with a friction pad, when the second shell is in the folding position, the friction pad contacts at least one of the first shell and the second shell.

10. The electronic device of claim 1, wherein, The shell assembly further comprises a third shell, the third shell is movably arranged at an end of the second shell away from the first shell, at least part of the structure of the flexible screen is unfolded from the shell assembly or folded into the shell assembly along with the relative movement of the second shell and the third shell, another set of the translation mechanisms is arranged between the second shell and the third shell.

11. The electronic device of claim 10, wherein, The translation mechanisms and the other set of translation mechanisms are rotationally connected to the same position of the second shell.

12. A translation mechanism for coupling between a first housing and a second housing, characterized by, The first shell and the second shell are movably connected along a first direction, the first shell is provided with a first connecting part and a second connecting part at intervals along a direction perpendicular to the first direction, the second shell is provided with a third connecting part and a fourth connecting part at intervals along a direction perpendicular to the first direction, the translation mechanism comprises a first swing arm, a second swing arm, a third swing arm, a fourth swing arm and a linkage, the first swing arm and the second swing arm are rotationally connected with the first connecting part and the second connecting part respectively, the third swing arm and the fourth swing arm are rotationally connected with the third connecting part and the fourth connecting part respectively, the first swing arm, the second swing arm, the third swing arm and the fourth swing arm are linkage-connected through the linkage, during the relative movement of the first shell and the second shell, the first swing arm and the second swing arm swing by equal angles in the same direction relative to the first shell, the third swing arm and the fourth swing arm swing by equal angles in the same direction relative to the second shell, wherein the swing direction of the first swing arm relative to the first shell is opposite to the swing direction of the third swing arm relative to the second shell, the translation mechanism comprises a first rotating part and a second rotating part, the first swing arm and the third swing arm are rotationally connected with the first rotating part, the second swing arm and the fourth swing arm are rotationally connected with the second rotating part, the linkage fixes the relative position of the first rotating part and the second rotating part, and the line connecting the first rotating part and the second rotating part is parallel to the line connecting the first connecting part and the second connecting part. The linkage has a first hinged part and a second hinged part, the line connecting the first rotating part and the second rotating part is always parallel to the line connecting the first hinged part and the second hinged part, and both are kept perpendicular to the first direction, wherein the first hinged part is connected with the first swing arm, the second hinged part is connected with the second swing arm, or the first hinged part is connected with the third swing arm, and the second hinged part is connected with the fourth swing arm.

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