Folding mechanism and folding electronic equipment

Abstract

The invention discloses a folding mechanism and folding type electronic equipment, and belongs to the technical field of folding type electronic equipment. Comprising a base, a connecting block rotatably installed on the base and a sliding door plate slidably installed on the connecting block in the width direction of the connecting block, the folding mechanism has a folding state and a flattening state, the folding mechanism further comprises a swing arm set, the swing arm set comprises a first swing arm, the first swing arm is rotatably installed on the base, and the second swing arm is rotatably installed on the base. The first swing arm is movably installed on the connecting block in the length direction of the connecting block, and the first swing arm moves along with switching of the folding mechanism between a folding state and a flattening state; a first stop structure is arranged on the sliding door plate, and under the condition that the folding mechanism is in the folding state, the first swing arm stops the first stop structure so as to limit the sliding door plate to move in the direction where the base is located. The sliding door plate is effectively prevented from moving unexpectedly due to factors such as external force or inertia after collision occurs in a folded state, such as collision with a base shaft area.

Description

Technical Field

[0001] This application relates to the field of foldable electronic device technology, and particularly to a folding mechanism and a foldable electronic device. Background Technology

[0002] With the development of technology, foldable electronic devices are becoming increasingly widely used and have become important tools in people's daily lives and work. Foldable electronic devices are favored by people because they take up little space and are easy to carry.

[0003] Foldable electronic devices typically include two housings, a folding mechanism, and a display screen. The two housings are connected to opposite sides of the folding mechanism, and can open and close relative to each other under the action of the folding mechanism. The display screen is located on the same side of both housings and the folding mechanism, and is connected to the housings, thus folding or unfolding during the relative opening and closing of the two housings. In the flattened state of the folding mechanism, the display screen unfolds onto the surfaces of the two housings and the folding mechanism. The folding mechanism includes a base and a swing arm. The swing arm is rotatably mounted on the base, and the swing arm is fitted to the base via a virtual axis structure, allowing the swing arm to rotate and slide relative to the base.

[0004] The purpose of the drop ball test on the pivot tip is to simulate the impact of a heavy object on the pivot area that may occur in actual use, in order to test the product's reliability and impact resistance under such extreme conditions. In existing technology, to improve the reliability of the pivot tip drop ball test, a full-coverage sliding door panel pivot solution is adopted. In the flattened state, this door panel can completely cover the pivot area, significantly improving the reliability of the pivot in the flattened state.

[0005] However, since the door panel can slide towards the base, when dropped in the folded state, it will slide down the movement track due to inertia and impact the hinge area. This will cause severe deformation of the door panel itself, and may also crush the screen, causing problems such as screen peeling. In addition, the components in the hinge area also pose a strength risk during the impact. Summary of the Invention

[0006] This application provides a folding mechanism and a foldable electronic device. This folding mechanism can prevent the sliding door panel from hitting the base axis area when folded.

[0007] The technical solution is as follows:

[0008] The first aspect of this application provides a folding mechanism for use in a foldable electronic device, including a base, a connecting block rotatably mounted on the base, and a sliding door panel slidably mounted on the connecting block along the width direction. The folding mechanism has a folded state and a flattened state. The folding mechanism further includes a swing arm assembly, which includes a first swing arm rotatably mounted on the base and movably mounted on the connecting block along the length direction. The first swing arm moves as the folding mechanism switches between the folded state and the flattened state. A first stop structure is provided on the sliding door panel. When the folding mechanism is in the folded state, the first swing arm stops the first stop structure to restrict the sliding door panel from moving in the direction of the base.

[0009] By utilizing the aforementioned technical solution, and taking advantage of the characteristic that the first swing arm moves as the folding mechanism switches between folded and flattened states, the first swing arm can stop the first stop structure on the sliding door panel when the folding mechanism is in the folded state, thereby greatly improving the stability of the folding mechanism in the folded state. By restricting the movement of the sliding door panel towards the base, it effectively prevents undesirable movement of the sliding door panel due to external forces or inertia after a collision in the folded state, such as impacting the base axis area. This protects other components inside the folding mechanism, maintains the integrity of the structure, and helps extend the service life of the equipment.

[0010] In one possible design, a second stop structure is provided on the side of the first swing arm closest to the first stop structure. When the folding mechanism is in the folded state, the second stop structure stops the first stop structure, thereby restricting the sliding door panel from moving towards the base. This arrangement further enhances the stability in the folded state. The first swing arm moves with the folding mechanism as it switches between different states, and its ability to stop the sliding door panel in the folded state improves stability.

[0011] In one possible design, the first stop structure includes a first stop surface facing the base, and the second stop structure includes a second stop surface. When the folding mechanism is in the folded state, the first stop surface and the second stop surface mate to stop the first stop structure. Surface-to-surface mating provides a larger contact area, thereby making the stopping action more stable and reliable.

[0012] In one possible design, the first stop structure includes a first stop boss, with a first stop surface disposed on the side of the first stop boss near the base; the second stop structure includes a second stop boss, with a second stop surface disposed on the side of the second stop boss away from the base. Providing the first and second stop bosses, and placing the stop surfaces at specific positions on the bosses, can significantly enhance the stopping effect.

[0013] In one possible design, the first stop structure includes a first stop groove, the first inner wall surface of the first stop groove is a first stop surface, and the second stop structure includes a third stop boss, the third stop boss having a third stop surface on the side away from the base. When the folding mechanism is in the folded state, the first stop surface and the second stop surface cooperate to stop the first stop structure.

[0014] In one possible design, the second inner wall surface of the first stop groove is a fourth stop surface, which is positioned opposite to the first inner wall surface. A fifth stop surface is provided on the side of the third stop boss closest to the base. When the folding mechanism is in the folded state, the fifth stop surface blocks the fourth stop surface, thus restricting the sliding door panel from moving away from the base. When the folding mechanism is in the folded state, the third stop boss is embedded in the first stop groove. Upon collision, not only do the first and third stop surfaces cooperate to restrict the sliding door panel from moving towards the base, but the cooperation of the fourth and fifth stop surfaces further restricts the sliding door panel from moving away from the base.

[0015] In one possible design, the inner wall of the base is provided with a first limiting slope. This first limiting slope gradually slopes inwards from the edge of the base towards its central axis. A limiting part is provided on the side of the sliding door panel closest to the base. When the folding mechanism is in the folded state, the limiting part faces the first limiting slope. When the device is impacted, if the door panel tends to deform towards the screen, the first limiting slope will contact the limiting part, thereby preventing the door panel from moving further towards the screen. This design effectively prevents the door panel from deforming and squeezing the screen, avoiding problems such as creases, cracks, and bright spots on the screen, protecting the integrity of the screen, and ensuring that the display quality is not affected.

[0016] In one possible design, the limiting part is a second limiting slope, which has the same inclination angle as the first limiting slope. Upon collision, the two slopes can come into contact. This contact allows for more even and stable force transmission when the device is impacted. The interaction between the two slopes effectively disperses the impact force, preventing excessive localized stress that could lead to door panel deformation or damage.

[0017] In one possible design, the connecting block is provided with a first X-direction guide portion, and the sliding door panel is provided with a second X-direction guide portion. The first X-direction guide portion and the second X-direction guide portion cooperate to guide the sliding of the sliding door panel in the width direction of the connecting block; wherein, X-direction is the width direction of the connecting block.

[0018] In one possible design, a first guide structure is provided on the first swing arm, and a second guide structure is provided on the sliding door panel. During the movement of the first swing arm, the first swing arm is driven by the cooperation of the first and second guide structures to drive the sliding door panel to slide. This ensures a precise transmission relationship between the movement of the sliding door panel and the movement of the first swing arm.

[0019] In one possible design, the connecting block is provided with a Y-direction guide groove, which forms an opening near the first swing arm. The first swing arm is provided with a Y-direction guide structure, which passes through the opening into the Y-direction guide groove and is slidable along the Y direction. This ensures precise guidance of the first swing arm's movement in the Y direction. During the movement of the folding mechanism, the movement of the first swing arm can achieve stable and accurate sliding through the cooperation of the Y-direction guide structure and the Y-direction guide groove.

[0020] In one possible design, a first helical driving surface is provided on the base, and a first helical transmission surface is provided on the first swing arm. The first helical driving surface and the first helical transmission surface abut against each other and are adapted to each other. During the rotation of the first swing arm, the first helical driving surface and the first helical transmission surface cooperate to drive the first swing arm to move along the length direction of the base. Due to the special shape of the helical surface, this movement is not just a simple rotation, but also accompanied by displacement in a specific direction. As the first swing arm continues to rotate, the interaction between the helical surfaces continues, and the first swing arm will continuously move along the length direction of the base.

[0021] In one possible design, a second helical driving surface is provided on the base, with the helical direction of the second helical driving surface being the same as that of the first helical driving surface and positioned opposite to it. A second helical transmission surface is provided on the first swing arm, with the helical direction of the second helical transmission surface being the same as that of the first helical transmission surface. The second helical driving surface and the second helical transmission surface abut against each other and are compatible. During the rotation of the first swing arm, the first helical driving surface and the first helical transmission surface cooperate to drive the first swing arm to rotate while simultaneously moving along the length of the base. The base has a second helical driving surface with the same helical direction as the first helical driving surface and positioned opposite to it; similarly, the first swing arm also has a corresponding second helical transmission surface with the same helical direction as the first helical transmission surface.

[0022] In one possible design, the first guide structure includes a guide post, and the second guide structure includes a path groove. The path groove is disposed in the Y-direction guide structure, and the guide post is movably inserted in the path groove. The path groove is inclined along the Y-direction. When the folding mechanism is in the folded state, the guide post is located at one end of the path groove near the central axis of the base. When the folding mechanism is in the flattened state, the guide post is located at one end of the path groove away from the central axis of the base.

[0023] In one possible design, the path groove includes a first path segment and a second path segment. The inclination angle of the second path segment is greater than that of the first path segment. When the folding mechanism is in the folded state, the guide protrusion is located in the first path segment; when the folding mechanism is in the flattened state, the guide protrusion is located in the second path segment. This two-stage design allows for control of the sliding door panel's sliding speed according to the needs of different stages, whether unfolding or folding. During unfolding, the combination of initial slow sliding and subsequent rapid sliding ensures a smooth transition, improves efficiency, and effectively protects the axis area in the flattened state. During folding, the initial fast-then-slow sliding method satisfies the need for rapid folding initiation while ensuring the stability of the device in the later stages.

[0024] In one possible design, the swing arm assembly also includes a second swing arm, which is rotatably mounted on the base and connected to the connecting block.

[0025] A second aspect of this application provides a foldable electronic device, including a folding mechanism as provided in any of the above technical solutions.

[0026] Since the foldable electronic device includes the folding mechanism described above, it possesses at least all the beneficial effects of the folding mechanism, which will not be elaborated further here. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the foldable electronic device provided in this application embodiment in a folded state;

[0028] Figure 2 This is a schematic diagram of the foldable electronic device provided in this application embodiment in a semi-unfolded state;

[0029] Figure 3 This is a schematic diagram of the foldable electronic device provided in this application embodiment in its unfolded state;

[0030] Figure 4 yes Figure 3 Exploded view of the components of a foldable electronic device;

[0031] Figure 5 This is a schematic diagram of the main structure of the folding mechanism provided in this application embodiment when the sliding door panel is hidden;

[0032] Figure 6 yes Figure 5 Enlarged view of region A in the middle;

[0033] Figure 7 This is a bottom view of the folding mechanism provided in the embodiments of this application when it is in a flattened state;

[0034] Figure 8 This is a bottom view of the folding mechanism provided in this application embodiment when it is in a folded state;

[0035] Figure 9 This is a front view schematic diagram of the folding mechanism provided in the embodiment of this application when it is in a flattened state;

[0036] Figure 10 yes Figure 9 A schematic diagram of the structure when one of the sliding door panels becomes transparent;

[0037] Figure 11 This is a schematic diagram of the folding mechanism provided in this application embodiment when the connecting block is hidden;

[0038] Figure 12 yes Figure 11 Enlarged view of region B in the middle;

[0039] Figure 13 This is a bottom view of the folding mechanism provided in this application embodiment, showing the hidden components when it is in a folded state;

[0040] Figure 14 yes Figure 13 Enlarged view of region C in the middle;

[0041] Figure 15 This is a transparent structural diagram of the folding mechanism provided in the embodiments of this application when it is in a folded state;

[0042] Figure 16 This is a schematic diagram of the structure of the connecting block provided in an embodiment of this application;

[0043] Figure 17 This is a schematic diagram of the folding mechanism provided in this application embodiment, concealing the first swing arm and the connecting block;

[0044] Figure 18 This is a schematic diagram of the folding mechanism provided in this application embodiment, where the connecting block is hidden.

[0045] Figure 19 This is a schematic diagram of the structure of the first swing arm provided in the embodiment of this application;

[0046] Figure 20 This is a schematic diagram of the main structure of the sliding door panel provided in an embodiment of this application;

[0047] Figure 21 yes Figure 20 Enlarged view of region D in the middle;

[0048] Figure 22 This is a structural schematic diagram of the sliding door panel provided in an embodiment of this application;

[0049] Figure 23This is a schematic diagram of the folding mechanism provided in this application embodiment when it is in a flattened state;

[0050] Figure 24 This is a schematic diagram of the folding mechanism provided in this application embodiment in a flattened state, with a door panel and a first swing arm hidden.

[0051] Figure 25 This is a structural schematic diagram of the sliding door panel provided in an embodiment of this application from another angle;

[0052] Figure 26 This is a structural schematic diagram of the folding mechanism provided in this application embodiment when it is in a folded state at another angle;

[0053] The meanings of the various symbols in the attached icons are as follows:

[0054] 1. Foldable electronic devices;

[0055] 10. Folding mechanism; 20. First housing; 30. Second housing; 40. Display screen; 41. First part; 42. Second part; 43. Foldable part;

[0056] 11. Base; 111. First limiting inclined surface; 112. First spiral driving surface; 113. Second spiral driving surface;

[0057] 12. Connecting block; 121. First X-direction guide section; 122. Y-direction guide groove;

[0058] 13. Sliding door panel; 131. First stop structure; 1311. First stop surface; 1312. Limiting part; 1313. Second limiting inclined surface; 132. Second guide structure; 1321. First path segment; 1322. Second path segment; 133. Second X-direction guide part;

[0059] 14. Swing arm assembly; 141. First swing arm; 1411. Second stop structure; 1412. Second stop surface; 142. First guide structure; 143. Y-direction guide structure; 1431. Guide protrusion; 144. First helical drive surface; 145. Second helical drive surface; 146. Second swing arm. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0061] It should be understood that "multiple" as mentioned in this application refers to two or more. In the description of this application, unless otherwise stated, " / " indicates "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist, for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, to facilitate a clear description of the technical solutions of this application, the terms "first," "second," etc., are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and that "first," "second," etc., do not necessarily imply differences.

[0062] In related technologies, foldable electronic devices typically include two housings, a folding mechanism, and a display screen. The two housings are connected to opposite sides of the folding mechanism and can open and close relative to each other under the action of the folding mechanism. The display screen is located on the same side of both housings and the folding mechanism, and is connected to both housings, thus unfolding during the relative opening and closing of the housings. In the flattened state of the folding mechanism, the display screen unfolds onto the surfaces of the two housings and the folding mechanism. The folding mechanism includes a base and a swing arm. The swing arm is rotatably mounted on the base, and the swing arm is fitted to the base via a virtual axis structure, allowing the swing arm to rotate and slide relative to the base.

[0063] The purpose of the hinge tip drop ball test is to simulate the impact of a heavy object on the hinge area that may occur in actual use, in order to test the product's reliability and impact resistance under such extreme conditions. In existing technology, a hinge solution with a fully covered sliding door panel is used to improve the reliability of the hinge tip drop ball test. When the display is flattened, this door panel can completely cover the hinge area, significantly improving the reliability of the hinge in the flattened state. However, since the door panel can slide towards the base, when dropped in the folded state, the door panel will slide down the movement track under inertia and impact the hinge area. This will cause severe deformation of the door panel itself, and may also squeeze the screen, causing problems such as screen peeling. Furthermore, the components in the hinge area also face strength risks during the impact.

[0064] To address the technical problem of the door panel impacting the base axis area during a collision in the aforementioned related technologies, this embodiment provides a folding mechanism applicable to foldable electronic devices. This application also provides a foldable electronic device incorporating the aforementioned folding mechanism. The folding mechanism and foldable electronic device provided in this application embodiment will be explained in detail below.

[0065] Figure 1This application provides a foldable electronic device 1, which includes, but is not limited to, cellphones, notebook computers, tablet personal computers, laptop computers, personal digital assistants, wearable devices, or mobile devices. In this embodiment, a cellphone is used as an example for illustration.

[0066] Figure 1 The foldable electronic device 1 shown is in a folded state. Figure 2 The foldable electronic device 1 shown is in a semi-flattened state. Figure 3 The foldable electronic device 1 shown is in a flattened state. Among them, Figure 2 The unfolding angle α of the foldable electronic device 1 shown is 90 degrees. Figure 3 The unfolding angle β of the foldable electronic device 1 shown is 180 degrees.

[0067] It should be noted that the angles illustrated in the embodiments of this application are allowed to have slight deviations. For example, Figure 2 The unfolding angle α of the foldable electronic device 1 shown is 90 degrees, which means that α can be 90 degrees, or approximately 90 degrees, such as 80 degrees, 85 degrees, 95 degrees, or 100 degrees. Figure 3 The unfolding angle β of the foldable electronic device 1 shown is 180 degrees. This means that β can be 180 degrees, or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles illustrated in the following text can be understood in the same way.

[0068] The foldable electronic device 1 shown in this embodiment is an electronic device that can be folded once. In some other embodiments, the foldable electronic device 1 can also be an electronic device that can be folded multiple times (more than twice). In this case, the foldable electronic device 1 may include multiple parts, and two adjacent parts can be folded relatively close to each other until the foldable electronic device 1 is in a folded state, and two adjacent parts can be unfolded relatively far apart until the foldable electronic device 1 is in a flattened state.

[0069] For ease of description, in this embodiment, the width direction of the foldable electronic device 1 is defined as the X-axis direction, the length direction as the Y-axis direction, and the thickness direction as the Z-axis direction. The X-axis, Y-axis, and Z-axis directions are mutually perpendicular. It should be noted that the dimension in the width direction is not necessarily larger than the dimension in the length direction. It is worth noting that the limiting terms for parallel and perpendicular positional relationships mentioned in this embodiment are relative to the current technological level, not absolute and strict mathematical definitions, and slight deviations are allowed; approximation of parallelism and approximation of perpendicularity are acceptable. For example, A and B being parallel means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B being perpendicular means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees. In this embodiment, the foldable electronic device 1 is described using directional terms such as "top," "bottom," "left," "right," "front," and "rear," and the orientation is mainly based on the foldable terminal's position on the attached... Figure 3 The orientation of the display is described as follows: the positive direction of the Y-axis is "top", the negative direction of the Y-axis is "bottom", the positive direction of the X-axis is "left", the negative direction of the X-axis is "right", the positive direction of the Z-axis is "front", and the negative direction of the Z-axis is "back".

[0070] Please see Figure 4 , Figure 4 yes Figure 3The exploded structural diagram is shown below. The foldable electronic device 1 includes a first housing 20, a second housing 30, a folding mechanism 10, and a display screen 40. The folding mechanism 10 is connected between the first housing 20 and the second housing 30. Specifically, the first housing 20 and the second housing 30 are respectively mounted on opposite sides of the folding mechanism 10 in the width direction; that is, the first housing 20 and the second housing 30 are respectively mounted on the left and right sides of the folding mechanism 10. The first housing 20 and the second housing 30 rotate relative to each other via the folding mechanism 10. The rotation directions of the first housing 20 and the second housing 30 are opposite. The display screen 40 is disposed on one side of the first housing 20, the second housing 30, and the folding mechanism 10; specifically, the display screen 40 is disposed on the front side of the first housing 20, the second housing 30, and the folding mechanism 10. The display screen 40 includes a first part 41, a second part 42, and a foldable part 43. The foldable part 43 is located between the first part 41 and the second part 42, and the foldable part 43 can be bent along the Y-axis direction. The first part 41, the second part 42, and the foldable part 43 together constitute the display screen 40. In this embodiment, the display screen 40 is a flexible display screen, such as an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen.

[0071] The foldable electronic device 1 folds by bringing the first housing 20 and the second housing 30 closer together, causing the display screen 40 to fold. When the foldable electronic device 1 is in the folded state, the foldable portion 43 of the display screen 40 bends, and the first portion 41 and the second portion 42 are positioned opposite each other. At this time, the display screen 40 is located between the first housing 20 and the second housing 30, which greatly reduces the probability of the display screen 40 being damaged and achieves effective protection for the display screen 40.

[0072] Please refer to the following: Figure 2 and Figure 4The first housing 20 and the second housing 30 rotate relative to each other via the folding mechanism 10, causing the display screen 40 to unfold as the first housing 20 and the second housing 30 move away from each other, thus unfolding the foldable electronic device 1 to a semi-flattened state. When the foldable electronic device 1 is in the semi-flattened state, the first housing 20 and the second housing 30 unfold to an angle α, the first part 41 and the second part 42 unfold relative to each other, and the foldable part 43 unfolds as well. At this time, the angle between the first part 41 and the second part 42 is α.

[0073] Please refer to the following: Figure 3 and Figure 4 The first housing 20 and the second housing 30 rotate relative to each other via the folding mechanism 10. The first housing 20 and the second housing 30 can have the same structure and can be mirror-symmetrically arranged relative to the folding mechanism 10. The relative movement of the first housing 20 and the second housing 30 causes the display screen 40 to further unfold until the foldable electronic device 1 is flattened. When the foldable electronic device 1 is flattened, the angle between the first housing 20 and the second housing 30 is β. The foldable portion 43 unfolds, and the first portion 41 and the second portion 42 unfold relative to each other. At this time, the angle between the first portion 41, the second portion 42, and the foldable portion 43 is all β, and the display screen 40 has a large display area, realizing a large-screen display for the foldable electronic device 1 and improving the user experience. It should be noted that angles α and β are both angles between the first housing 20 and the second housing 30; they are only used here to distinguish the different angles between the first housing 20 and the second housing 30 in different states of the foldable electronic device 1. Wherein, included angle α refers to the angle between the first housing 20 and the second housing 30 when the foldable electronic device 1 is in a semi-flattened state; included angle β refers to the angle between the first housing 20 and the second housing 30 when the foldable electronic device 1 is in a flattened state.

[0074] It should be understood that the foldable electronic device 1 shown in this application embodiment is folded inward, and the display screen 40 of the foldable electronic device 1 in the folded state is located inside the folding mechanism 10. In some other embodiments, the foldable electronic device 1 can also be folded outward, in which case the display screen 40 of the foldable electronic device 1 in the folded state is located outside the folding mechanism 10.

[0075] like Figures 5 to 8As shown, the folding mechanism 10 provided in this embodiment includes a base 11, a connecting block 12 rotatably mounted on the base 11, and a sliding door panel 13 slidably mounted on the connecting block 12 along the width direction. The folding mechanism 10 has a folded state and a flattened state. The folding mechanism 10 also includes a swing arm assembly 14, which includes a first swing arm 141. The first swing arm 141 is rotatably mounted on the base 11 and movably mounted on the connecting block 12 along the length direction. The first swing arm 141 moves as the folding mechanism 10 switches between the folded state and the flattened state. A first stop structure 131 is provided on the sliding door panel 13. When the folding mechanism 10 is in the folded state, the first swing arm 141 stops the first stop structure 131 to restrict the sliding door panel 13 from moving in the direction of the base 11.

[0076] It should be noted that the base 11 is the basic support part of the folding mechanism 10, providing a position for the installation and fixation of other components. The connecting block 12 plays a connecting and transmission role, and is rotatably mounted on the base 11. It is one of the key components for realizing the switching of different states of the folding mechanism 10. As a connecting component, it connects other components such as the sliding door panel 13 and the swing arm assembly 14 together to form an organic whole. For example, it can realize the rotation of the first swing arm 141 and its movement along the length direction of the connecting block 12, as well as the sliding of the sliding door panel 13 and other linkage actions. There are two connecting blocks 12, corresponding to the first housing 20 and the second housing 30 respectively. As an important part of the folding mechanism 10, the connecting block 12 realizes rotation and other actions under the action of the folding mechanism 10, thereby cooperating with the rotation of the first housing 20 and the second housing 30. For example, during the process of the device changing from a folded state to a semi-flattened state, the rotation of the connecting block 12 cooperates with the first housing 20 to move away from the second housing 30, thereby driving the display screen 40 to unfold. During the switching process, the connecting block 12 drives other components to make corresponding adjustments to ensure that the entire folding mechanism 10 can smoothly switch from one state to another.

[0077] like Figure 5 , Figure 9 , Figure 10 As shown, in the flattened state of the folding mechanism 10, the sliding door panel 13 can protect the hinge area. For example, in the existing full-coverage sliding door panel hinge solution, the sliding door panel can completely cover the hinge area in the flattened state, protecting the hinge area structure and significantly improving the reliability of the hinge in the flattened state. As the device switches between folded and flattened states, the sliding door panel will slide accordingly. Its sliding is to adapt to the folding and unfolding process of the display screen 40, as well as the relative opening and closing action of the two housings.

[0078] like Figure 11 and Figure 12As shown, this embodiment utilizes the characteristic that the first swing arm 141 moves as the folding mechanism 10 switches between folded and flattened states. When the folding mechanism 10 is in the folded state, the first swing arm 141 can stop the first stop structure 131 on the sliding door panel 13, thereby greatly improving the stability of the folding mechanism 10 in the folded state. By restricting the movement of the sliding door panel 13 towards the base 11, it effectively prevents undesirable movement of the sliding door panel 13 due to external forces or inertia after a collision in the folded state, such as impacting the axis area of ​​the base 11. This protects other components inside the folding mechanism 10, maintains structural integrity, and helps extend the service life of the device, which is crucial for foldable electronic devices.

[0079] Furthermore, the first swing arm 141 moves as the folding mechanism 10 switches between the folded and flattened states, flexibly adapting to the needs of different usage states. For example, the movement of the first swing arm 141 can be used in conjunction with other structures to achieve functions such as synchronization and damping. In the folded state, it can cooperate with the first stop structure 131 to play a stopping role, and in the flattened state, it can cooperate with the overall structure to make corresponding adjustments, thus improving the practicality of the folding mechanism 10.

[0080] like Figure 12 As shown, in this embodiment, a second stop structure 1411 is provided on the side of the first swing arm 141 near the first stop structure 131. When the folding mechanism 10 is in the folded state, the second stop structure 1411 stops the first stop structure 131 to restrict the sliding door panel 13 from moving towards the base 11. This arrangement further enhances the stability in the folded state. As mentioned earlier, the first swing arm 141 moves with the folding mechanism 10 in different states, and can stop the sliding door panel 13 in the folded state to improve stability. The addition of the second stop structure 1411, in cooperation with the first stop structure 131, is equivalent to adding an extra layer of "insurance" to the folding mechanism 10 in the folded state to ensure stable stopping. The cooperation of the two stop structures greatly improves the stability in the folded state, ensuring that the device maintains a robust structure in the folded state. When a collision occurs in the folded state, a single stop structure may fail under strong external force or inertia.

[0081] The presence of the second stop structure 1411 significantly reduces this risk. Even under significant external impact, the two stop structures work together to effectively restrict the sliding door panel 13 from moving towards the base 11, preventing unintended movement due to collision and avoiding impact on the base 11's axis area and other internal components. This reduces the possibility of wear and damage to internal parts caused by accidental door panel movement. Protection of the axis area is crucial for foldable electronic devices. This embodiment maintains good device performance during long-term use, reduces maintenance costs, and provides users with a more reliable and durable user experience.

[0082] In one embodiment, the sliding door panel 13 can also be made of a material with a certain degree of elasticity, such as elastic plastic. Physically, this material can play an important cushioning role when the phone is subjected to minor impacts. When the phone is accidentally subjected to a minor external impact, such as accidentally making slight contact with other objects or experiencing small vibrations during daily use, the sliding door panel 13 will initially absorb some of the impact force. Due to its elasticity, it can absorb and disperse the impact energy to a certain extent, preventing the impact force from being directly transmitted to other critical components of the folding mechanism 10 and the internal electronic components.

[0083] For example, when a mobile phone falls from a table, even though the drop is not high, it still generates a certain amount of impact. At this moment, the elasticity of the sliding door panel 13 allows it to deform slightly at the moment of impact, thus slowing down the transmission speed and intensity of the impact force through its own deformation. This deformation acts like a spring, gradually dissipating the impact force, thereby protecting important components such as the base 11, connecting block 12, and first swing arm 141 from direct damage.

[0084] like Figure 12 As shown, in this embodiment, the first stop structure 131 includes a first stop surface 1311 facing the base 11, and the second stop structure 1411 includes a second stop surface 1412. When the folding mechanism 10 is in the folded state, the first stop surface 1311 and the second stop surface 1412 cooperate to stop the first stop structure 131. Surface-to-surface cooperation means that the two stop surfaces can achieve full contact. Compared with point contact or line contact, surface-to-surface cooperation can provide a larger contact area, thereby making the stopping effect more stable and reliable. When the folding mechanism 10 is in the folded state, regardless of the direction of the external force, the full contact of the two stop surfaces can evenly distribute the external force, avoiding structural damage caused by excessive local force. For example, when the device is accidentally hit from the side, the surface-to-surface cooperation of the stop surfaces can evenly transfer the impact force to the entire stopping structure, thereby protecting the sliding door panel 13 and other components from damage.

[0085] In this embodiment, the first stop structure 131 includes a first stop boss, and a first stop surface 1311 is disposed on the side of the first stop boss near the base 11. The second stop structure 1411 includes a second stop boss, and a second stop surface 1412 is disposed on the side of the second stop boss away from the base 11. Providing the first and second stop bosses, and placing the stop surfaces at specific positions on the bosses, significantly enhances the stopping effect. The presence of the bosses increases the height and volume of the stop structure, making the contact between the two bosses more obvious and powerful in the folded state. When the sliding door panel 13 tends to move towards the base 11, the first and second stop bosses can contact and provide a stopping effect earlier, preventing the door panel from moving.

[0086] In one embodiment, both the first stop surface 1311 and the second stop surface 1412 are planar. The mating of the planar surfaces provides a stable contact area, ensuring that the sliding door panel 13 will not easily shift when folded. When the foldable electronic device is placed in a backpack and subjected to pressure or slight vibration, the mating of the planar stop surfaces effectively prevents the sliding door panel 13 from moving towards the base 11, protecting the internal electronic components and display screen 40.

[0087] In other embodiments, one of the first stop surface 1311 and the second stop surface 1412 is a convex surface and the other is a concave surface. When the folding mechanism 10 is subjected to a non-positive impact, such as a side or oblique impact, the cooperation of the concave and convex surfaces can effectively disperse the impact force. The convex second stop surface 1412 will first come into contact with the direction of the impact force, and due to its curved shape, it can transmit the impact force in different directions. Part of the impact force will be dispersed to the surrounding area along the curvature of the convex surface, while another part will be transmitted to the concave first stop surface 1311. The shape of the concave surface can further disperse the impact force over a larger area, thereby reducing the intensity of the local force and reducing damage to the internal components of the folding mechanism 10.

[0088] The convex surface fitting into the concave surface acts like a mortise and tenon joint, restricting the movement of the sliding door panel 13 in all directions. Even under non-positive impact, this fit maintains the integrity of the stop structure, ensuring that the folding mechanism 10 remains in a stable folded state after impact.

[0089] For example, in a foldable smartphone, when the phone accidentally slips from the hand and hits the ground at an angle, the concave and convex stop structures can disperse the impact force. The interlocking state of the convex surface within the concave surface, like a mortise and tenon structure, can restrict the movement of the sliding door panel 13 in all directions. Even under non-positive impact, it can ensure that the folding mechanism 10 remains stable after the impact.

[0090] In an embodiment different from the above embodiments, the first stop structure 131 in this application embodiment includes a first stop groove, the first inner wall surface of the first stop groove is a first stop surface 1311, and the second stop structure 1411 includes a third stop boss, the third stop surface being disposed on the side of the third stop boss away from the base 11. In this particular embodiment, the first stop structure 131 is a first stop groove. The shape of the groove can be rectangular, square, circular, or other specific geometric shapes, depending on the trajectory of the third stop boss entering the groove.

[0091] The first inner wall surface of the first stop groove serves as the first stop surface 1311. This surface can be specially treated to increase friction and stability with the third stop boss. For example, roughening treatment, adding an anti-slip coating, or designing some small protrusions or depressions can be used on this surface to improve the stopping effect.

[0092] The third stop surface is located on the side of the third stop boss away from the base 11. This surface can also be specially treated to enhance its cooperation with the first stop surface 1311. For example, this surface can be designed to be complementary to the shape of the first stop surface 1311, or some elastic material can be added to this surface to provide better cushioning and stopping effect. When the folding mechanism 10 is in the folded state, the third stop boss will be embedded in the first stop groove, and the first stop surface 1311 and the third stop surface will be in close contact, thereby restricting the sliding door panel 13 from moving in the direction of the base 11.

[0093] In practical applications, this design can be widely used in various foldable electronic devices, such as foldable screen phones, foldable tablets, and foldable e-readers.

[0094] In this embodiment, the second inner wall surface of the first stop groove is a fourth stop surface, which is disposed opposite to the first inner wall surface. A fifth stop surface is provided on the side of the third stop boss near the base 11. When the folding mechanism 10 is in the folded state, the fifth stop surface blocks the fourth stop surface to restrict the sliding door panel 13 from moving away from the base 11. The first stop groove has opposing first and second inner wall surfaces, which serve as the first stop surface 1311 and the fourth stop surface, respectively. The third stop boss has a third stop surface on the side away from the base 11 and a fifth stop surface on the side near the base 11. When the folding mechanism 10 is in the folded state, the third stop boss is embedded in the first stop groove. Upon collision, not only do the first stop surface 1311 and the third stop surface cooperate to restrict the sliding door panel 13 from moving towards the base 11, but the cooperation of the fourth and fifth stop surfaces further restricts the sliding door panel 13 from moving away from the base 11. This all-around stop structure can precisely limit the position of the sliding door panel 13 in two opposite directions. Regardless of the direction of impact, it effectively maintains the stability of the sliding door panel 13, providing reliable protection for other components inside the folding mechanism 10. When the folding electronic device is accidentally dropped or squeezed, the multi-faceted engagement of the first stop groove and the third stop boss effectively disperses the impact force, protecting critical internal components from damage and extending the device's lifespan.

[0095] The screen is one of the core components of foldable electronic devices, and its integrity is crucial for the normal use of the device and the user experience. If the door panel deforms and squeezes the screen, it may cause problems such as creases, cracks, and bright spots, seriously affecting the screen's display quality. When a foldable electronic device is impacted, the door panel is a component that is easily deformed by external forces. If the door panel deforms towards the screen side, it may cause damage such as squeezing and scratching, causing the screen to peel off, affecting the screen's display effect and lifespan.

[0096] like Figure 13 and Figure 14As shown, in this embodiment, the inner wall of the base 11 is provided with a first limiting slope 111. The first limiting slope 111 gradually slopes inward from the edge of the base 11 towards the central axis of the base 11. A limiting part 1312 is provided on the side of the sliding door panel 13 closest to the base 11. When the folding mechanism 10 is in the folded state, the limiting part 1312 faces the first limiting slope 111, where the inward direction of the base 11 is the direction where the screen side is located. By providing the first limiting slope 111 on the inner wall of the base 11 and providing the limiting part 1312 on the side of the sliding door panel 13 closest to the base 11, when the folding mechanism 10 is in the folded state, the limiting part 1312 faces the first limiting slope 111. When the device is impacted, if the door panel tends to deform towards the middle screen side, the first limiting slope 111 will contact the limiting part 1312, thereby preventing the sliding door panel 13 from moving further towards the screen. This design effectively prevents the door panel from deforming and squeezing the screen, avoiding problems such as creases, cracks, and bright spots on the screen, protecting the integrity of the screen, and ensuring that the display quality of the screen is not affected.

[0097] The cooperation between the limiting bevel and the limiting part 1312 provides additional support and restraint for the door panel, enhancing the stability of the folding mechanism 10 in the folded state. Even under external impact, it ensures that the door panel will not easily shift or deform, thus protecting the screen and other internal components. This greatly improves the reliability of the equipment, extends its service life, and reduces equipment failures and maintenance costs caused by door panel deformation.

[0098] The limiting part 1312 can be a protrusion protruding from the side of the door panel near the base 11. The shape and size of this protrusion can be designed according to actual needs, such as being rectangular, circular, or other specific shapes. When the folding mechanism 10 is in the folded state, the protrusion contacts a specific position with the first limiting inclined surface 111, thereby limiting the movement of the door panel towards the screen.

[0099] In other embodiments, the limiting part 1312 can also be a groove structure, with a groove provided on the side of the door panel near the base 11, and a corresponding protrusion provided on the inner sidewall of the base 11. When the folding mechanism 10 is in the folded state, the protrusion is embedded in the groove to form a limit. The groove structure can provide a better positioning effect, ensuring that the movement direction of the door panel can be accurately limited under various conditions.

[0100] like Figure 14As shown, in this embodiment, the limiting part 1312 is a second limiting inclined surface 1313, and the second limiting inclined surface 1313 has the same inclination angle as the first limiting inclined surface 111. Since the limiting part 1312 is the second limiting inclined surface 1313 and has the same inclination angle as the first limiting inclined surface 111, the two inclined surfaces can fit together when a collision occurs while the folding mechanism 10 is in the folded state. This fit ensures that the force transmission is more uniform and stable when the device is impacted. The interaction between the two inclined surfaces effectively disperses the impact force, preventing excessive local force from causing deformation or damage to the door panel. Simultaneously, the fit also ensures a tighter contact between the limiting part 1312 and the first limiting inclined surface 111, further enhancing the restriction on the door panel's movement towards the screen and improving the stability of the device in the folded state.

[0101] In another embodiment, the limiting part 1312 and the first limiting inclined surface 111 can be designed as curved surfaces. For example, an arc-shaped curved surface can be used, so that when the device is impacted, the contact between the curved surfaces can better disperse the impact force and provide a certain buffering effect in different directions. This curved limiting structure can be optimized according to specific force analysis to improve the limiting effect on the door panel and the protection of the screen.

[0102] See Figure 23 As shown, in the flattened state of the folding mechanism 10, the sliding door panel 13 can protect the pivot area. For example, in the existing full-coverage sliding door panel 13 pivot scheme, the door panel can completely cover the pivot area in the flattened state, protecting the pivot area structure and significantly improving the reliability of the pivot in the flattened state. As the device switches between folded and flattened states, the sliding door panel 13 will slide accordingly. See [link / reference] Figures 14 to 18 As shown, in this embodiment, the connecting block 12 is provided with a first X-direction guide portion 121, and the sliding door panel 13 is provided with a second X-direction guide portion 133. The first X-direction guide portion 121 and the second X-direction guide portion 133 cooperate to guide the sliding of the sliding door panel 13 in the width direction of the connecting block 12; wherein, X-direction is the width direction of the connecting block 12. The sliding door panel 13 needs to slide stably in the width direction of the connecting block 12, and the cooperation of the first X-direction guide portion on the connecting block 12 and the second X-direction guide portion on the sliding door panel 13 provides precise guidance for it.

[0103] The first X-direction guide is a raised guide rail provided on the connecting block 12. This guide rail can be elongated and extends along the width direction of the connecting block 12. The cross-sectional shape of the guide rail can be rectangular, trapezoidal, or semi-circular, etc., and the surface of the guide rail is smoothed to reduce frictional resistance during sliding.

[0104] The second X-direction guide is a corresponding groove provided on the sliding door panel 13. The shape and size of the groove match the guide rail, so that the guide rail can be precisely embedded in the groove. When the sliding door panel 13 slides on the connecting block 12, the guide rail slides in the groove, providing stable guidance for the sliding door panel 13.

[0105] Alternatively, the second X-direction guide portion is a raised guide rail provided on the sliding door panel 13. This guide rail can be elongated and extends along the width direction of the connecting block 12. The cross-sectional shape of the guide rail can be rectangular, trapezoidal, or semi-circular, etc., and the surface of the guide rail is smoothed to reduce frictional resistance during sliding. The first X-direction guide portion is a corresponding groove provided on the connecting block 12. The shape and size of the groove match the guide rail, so that the guide rail can be precisely embedded in the groove. When the sliding door panel 13 slides on the connecting block 12, the guide rail slides within the groove, providing stable guidance for the sliding door panel 13.

[0106] In another embodiment, the first X-direction guide portion is a T-shaped groove provided on the connecting block 12. The T-shaped groove consists of a horizontal groove bottom and a vertical groove wall, forming a shape similar to the letter "T". This structure can provide a clear guide path for the sliding door panel 13, while also preventing the sliding door panel 13 from coming off in the vertical direction.

[0107] The second X-direction guide is a T-shaped protrusion provided on the sliding door panel 13. The shape of the T-shaped protrusion is adapted to the T-shaped groove. When the sliding door panel 13 is installed on the connecting block 12, the T-shaped protrusion is inserted into the T-shaped groove. During the sliding process, the T-shaped protrusion always moves within the T-shaped groove, ensuring that the sliding door panel 13 will not accidentally fall off the connecting block 12, thus achieving stable sliding and reliable guidance.

[0108] In another embodiment, the first X-direction guide is a slot provided on the connecting block 12. The slot can be an elongated groove arranged along the width direction of the connecting block 12. The two side walls of the slot can be designed to be slightly inclined inward to increase the anti-detachment effect. The second X-direction guide is a strip provided on the sliding door panel 13. The shape and size of the strip match the slot, and when the sliding door panel 13 is installed on the connecting block 12, the strip is inserted into the slot. Due to the inclined design of the two side walls of the slot, the strip will be subjected to a certain squeezing force after insertion, thereby preventing the strip from easily falling out of the slot.

[0109] In the embodiments of this application, the first X-direction guide portion includes two opposing semi-T-shaped grooves, which are spaced apart along the length of the connecting block 12. Each semi-T-shaped groove consists of a horizontal bottom and a vertical wall, forming an "L"-like shape. This structure provides a clear guide path for the sliding door panel 13 and also prevents the sliding door panel 13 from dislodging in the vertical direction.

[0110] The second X-direction guide is a semi-T-shaped protrusion provided on the sliding door panel 13. The shape of the semi-T-shaped protrusion conforms to the semi-T-shaped groove. When the sliding door panel 13 is installed on the connecting block 12, the semi-T-shaped protrusion is inserted into the semi-T-shaped groove. During the sliding process, the semi-T-shaped protrusion always moves within the semi-T-shaped groove, ensuring that the sliding door panel 13 will not accidentally fall off the connecting block 12, thus achieving stable sliding and reliable guidance.

[0111] like Figures 19 to 22 As shown, in this embodiment, a first guide structure 142 is provided on the first swing arm 141, and a second guide structure 132 is provided on the sliding door panel 13. During the movement of the first swing arm 141, the first swing arm 141 is driven by the cooperation of the first guide structure 142 and the second guide structure 132 to drive the sliding door panel 13 to slide. By providing the first guide structure 142 on the sliding door panel 13 and the second guide structure 132 on the first swing arm 141, the sliding door panel 13 can be driven to slide through the cooperation of these two guide structures during the movement of the first swing arm 141. This design ensures a precise transmission relationship between the movement of the sliding door panel 13 and the movement of the first swing arm 141. When the first swing arm 141 performs a specific movement, such as during the folding or unfolding process of the folding mechanism 10, the movement of the first swing arm 141 can be accurately converted into a driving force on the sliding door panel 13, causing the sliding door panel 13 to slide along a predetermined trajectory and speed. This ensures that when the folding mechanism 10 switches between different states, the sliding door panel 13 can move synchronously with the first swing arm 141, thus achieving smooth folding and unfolding of the device.

[0112] In this embodiment, when the folding mechanism 10 is in a flattened state, the sliding door panel 13 slides towards the center of the base 11 to a position that blocks the axis area of ​​the base 11. When the folding mechanism 10 is in a folded state, the sliding door panel 13 slides a predetermined distance away from the center of the base 11. In this embodiment, the specific sliding of the sliding door panel 13 when the folding mechanism 10 is in different states is achieved in the following way: First, during the flattening process of the folding mechanism 10, the first swing arm 141 makes a specific movement. Since the first swing arm 141 is provided with a first guide structure 142 and the sliding door panel 13 is provided with a second guide structure 132, the two guide structures cooperate to drive each other during the movement of the first swing arm 141. At this time, the movement of the first swing arm 141 can be accurately converted into a driving force on the sliding door panel 13, so that the sliding door panel 13 slides according to a predetermined trajectory and speed. As the folding mechanism 10 gradually flattens, the direction and force of the movement of the first swing arm 141 cause the sliding door panel 13 to slide towards the center of the base 11. This ensures that the sliding door panel 13 can be accurately moved to the position of the shielding base 11 axis area, thereby protecting the axis area and making the equipment present a cleaner and more stable appearance when flattened.

[0113] When the folding mechanism 10 begins to fold, the first swing arm 141 performs a specific movement again. Similarly, through the coordinated transmission of the first guide structure 142 and the second guide structure 132, the movement of the first swing arm 141 is converted into a driving force on the sliding door panel 13. At this time, the direction and force of the first swing arm 141 change, causing the sliding door panel 13 to slide away from the center of the base 11. This design is to adapt to changes in the internal space of the device in the folded state, avoid interference between the sliding door panel 13 and other components, and ensure that the folding mechanism 10 can smoothly complete the folding process. In summary, through the coordinated transmission of the first guide structure 142 and the second guide structure 132 during the movement of the first swing arm 141, the specific sliding of the sliding door panel 13 in different states of the folding mechanism 10 is achieved, meeting the needs of the device in different usage states.

[0114] See Figure 19 and Figure 24 As shown, the connecting block 12 in this embodiment is provided with a Y-direction guide groove 122. The Y-direction guide groove 122 forms a slot in the direction near the first swing arm 141. The first swing arm 141 is provided with a Y-direction guide structure 143, which passes through the slot and is inserted into the Y-direction guide groove 122, and can slide along the Y direction. This ensures that the movement of the first swing arm 141 in the Y direction has precise guidance. During the movement of the folding mechanism 10, the movement of the first swing arm 141 can achieve stable and accurate sliding through the cooperation of the Y-direction guide structure and the Y-direction guide groove. Limiting ribs are provided on the two opposite sidewalls of the Y-direction guide groove 122. After the Y-direction guide structure on the first swing arm 141 is inserted, the two limiting ribs can prevent the Y-direction guide structure 143 from coming out.

[0115] See Figure 19 and Figure 24As shown, in this embodiment, a first helical driving surface 112 is provided on the base 11, and a first helical transmission surface 144 is provided on the first swing arm 141. The first helical driving surface 112 and the first helical transmission surface 144 abut against each other and are adapted to each other. During the rotation of the first swing arm 141, the first helical driving surface 112 and the first helical transmission surface 144 cooperate to drive the first swing arm 141 to move along the length direction of the base 11. The first helical driving surface 112 on the base 11 and the first helical transmission surface 144 on the first swing arm 141 abut against each other and are adapted to each other, forming a structure similar to a helical pair. When the first swing arm 141 starts to rotate, due to the contact of the two helical surfaces, they generate an interaction force. When an external force is applied to the folding mechanism 10, causing the first swing arm 141 to start to rotate, the first helical transmission surface 144 on the first swing arm 141 will move along the first helical driving surface 112 on the base 11. Due to the special shape of the helical surface, this movement is not just a simple rotation, but also accompanied by displacement in a specific direction. As the first swing arm 141 rotates continuously, the interaction between the helical surfaces continues, and the first swing arm 141 moves continuously along the length of the base 11. This movement is smooth and continuous because the engagement of the helical surfaces ensures uniform and stable force transmission. The contact and engagement of the helical surfaces provide a large contact area and friction, making the first swing arm 141 more stable during movement. This stability is crucial for the normal operation of the folding mechanism 10, especially when subjected to external impacts or vibrations, ensuring that the various components of the folding mechanism 10 do not loosen or become misaligned.

[0116] In this embodiment, a second helical driving surface 113 is provided on the base 11. The helical direction of the second helical driving surface 113 is the same as that of the first helical driving surface 112, and they are arranged opposite to each other. A second helical transmission surface 145 is provided on the first swing arm 141. The helical direction of the second helical transmission surface 145 is the same as that of the first helical transmission surface 144. The second helical driving surface 113 and the second helical transmission surface 145 abut against each other and are adapted to each other. During the rotation of the first swing arm 141, the first helical driving surface 112 and the first helical transmission surface 144 cooperate to drive the first swing arm 141 to rotate while moving along the length direction of the base 11. The base 11 is provided with a second helical driving surface 113, and its helical direction is the same as that of the first helical driving surface 112 and they are arranged opposite to each other. At the same time, the first swing arm 141 is also provided with a corresponding second helical transmission surface 145, whose helical direction is the same as that of the first helical transmission surface 144. Thus, during the rotation of the first swing arm 141, not only do the first helical drive surface 112 and the first helical transmission surface 144 cooperate to generate driving force, but the second helical drive surface 113 and the second helical transmission surface 145 also cooperate to generate driving force simultaneously. Since the helical directions of the two helical surfaces are the same, they coordinate with each other during cooperation, jointly guiding the movement direction of the first swing arm 141. This consistency ensures that the first swing arm 141 can move accurately along the length of the base 11 while rotating, without deviating from the predetermined trajectory. Whether during the unfolding or folding process of the folding mechanism 10, the cooperation of the double helical surfaces guarantees the movement accuracy of the first swing arm 141, thereby achieving reliable operation of the equipment.

[0117] The combined effect of the two helical surfaces doubles the driving force on the first swing arm 141, thus enabling it to move more powerfully along the length of the base 11. Simultaneously, the opposing double helical surfaces also increase motion stability, reducing swaying and deviation of the first swing arm 141 during movement.

[0118] In this embodiment, the first guide structure 142 includes a guide protrusion 1431, and the second guide structure 132 includes a path groove. The path groove is disposed in the Y-direction guide structure 143, and the guide protrusion 1431 is movably inserted into the path groove, which is inclined along the Y-direction. When the folding mechanism 10 is in the folded state, the guide protrusion 1431 is located at one end of the path groove near the central axis of the base 11. When the folding mechanism 10 is in the flattened state, the guide protrusion 1431 is located at one end of the path groove away from the central axis of the base 11. From the overall layout, the inclination direction of the path groove makes one end relatively close to the center of the base 11, while the other end is relatively far from the center of the base 11. When flattened, the movement of the first swing arm 141 causes the guide protrusion 1431 to slide in the path groove. Due to the inclination of the path groove towards the center of the base 11, the guide protrusion moves towards the center of the base 11, thereby causing the sliding door panel 13 to slide towards the center of the base 11, thus blocking the axial area of ​​the base 11. During folding, the movement of the first swing arm 141 causes the guide post 1431 to slide in the path groove. The guide post moves away from the center of the base 11, thereby causing the sliding door panel 13 to slide away from the center of the base 11.

[0119] See Figure 21 and Figure 25 As shown, the path groove in this embodiment includes a first path segment 1321 and a second path segment 1322. The inclination angle of the second path segment 1322 is greater than that of the first path segment 1321. When the folding mechanism 10 is in a folded state, the guide protrusion 1431 is located in the first path segment 1321. When the folding mechanism 10 is in a flattened state, the guide protrusion 1431 is located in the second path segment 1322. During the unfolding process of the folding mechanism 10, initially in a folded state, the guide protrusion 1431 is located in the first path segment 1321. Because the inclination angle of the first path segment 1321 is small, the sliding door panel 13 slides towards the center of the base 11 at a relatively slow speed. This stage is the initial stage of the unfolding process, which plays a role in smooth transition. It can avoid impacting the internal parts of the folding mechanism 10 due to excessive unfolding speed, reducing the potential risk of damage. As unfolding progresses, when the folding mechanism 10 gradually approaches the flattened state, the guide protrusion 1431 enters the second path segment 1322. The second path segment 1322, with its larger tilt angle, accelerates the movement of the guide post 1431, thereby causing the sliding door panel 13 to slide rapidly towards the center of the base 11, thus shielding the axial area of ​​the base 11. This rapid sliding process ensures that the folding mechanism 10 is protected in a timely manner when flattened, and also improves the efficiency of equipment unfolding.

[0120] See Figure 10 , Figure 21 , Figure 25As shown, during the folding process, when the folding mechanism 10 begins to change from a flattened state, the guide post 1431 is located in the second path segment 1322. At this time, due to the larger inclination angle of the second path segment 1322, the sliding door panel 13 slides relatively quickly away from the center of the base 11, providing an efficient start for the initial stage of the folding process. As folding continues, the guide post 1431 enters the first path segment 1321. The smaller inclination angle of the first path segment 1321 slows down the sliding speed of the sliding door panel 13, which helps maintain the stability of the device in the later stages of folding and avoids collisions or damage to parts that may occur due to excessively rapid sliding.

[0121] This two-stage design allows for precise control of the sliding door panel 13's speed during both unfolding and folding processes, tailored to different stages. During unfolding, the combination of initial slow sliding and subsequent rapid sliding ensures a smooth transition, improves efficiency, and effectively protects the axis area when flattened. During folding, the initial fast-then-slow sliding method satisfies the need for rapid folding initiation while maintaining stability in the later stages.

[0122] like Figure 5 and Figure 26 As shown, the swing arm assembly 14 in this embodiment further includes a second swing arm 146, which is rotatably mounted on the base 11 and connected to the connecting block 12. The second swing arm 146 can also be referred to as the main swing arm. The main swing arm is rotatably mounted on the base 11 and is rotatably connected via a pivot, hinge, or other connecting structure, allowing the main swing arm to rotate relative to the base 11 within a certain angle range, thereby realizing the folding and unfolding actions of the folding mechanism 10.

[0123] The main swing arm is connected to the connecting block 12. This connection can be direct or through other intermediate components. Connection methods include bolt connections, snap-fit ​​connections, etc. The swing arm can transmit external forces (such as manual operation by the user) to other components of the folding mechanism 10, achieving force transmission and coordinated movement. For example, when the user manually opens the folding device, the force applied to the device is transmitted to the connecting block 12 through the main swing arm, causing them to move along a predetermined trajectory. Its connection with the base 11 and the connecting block 12 forms a stable structure capable of withstanding certain external forces and torques. The presence of the main swing arm increases the overall structural stability of the folding mechanism 10.

[0124] According to another aspect of this application, a foldable electronic device is provided, including the aforementioned folding mechanism.

[0125] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A folding mechanism, applied to a foldable electronic device, characterized in that, The system includes a base, a connecting block rotatably mounted on the base, and a sliding door panel slidably mounted on the connecting block along its width direction. The folding mechanism has a folded state and a flattened state. The folding mechanism further includes: The swing arm assembly includes a first swing arm, which is rotatably mounted on the base and movable on the connecting block along the length direction of the connecting block. The first swing arm moves as the folding mechanism switches between a folded state and a flattened state. The sliding door panel is provided with a first stop structure. When the folding mechanism is in the folded state, the first swing arm stops the first stop structure to restrict the sliding door panel from moving in the direction of the base.

2. The folding mechanism as described in claim 1, characterized in that, A second stop structure is provided on the side of the first swing arm near the first stop structure. When the folding mechanism is in the folded state, the second stop structure stops the first stop structure to restrict the sliding door panel from moving in the direction of the base.

3. The folding mechanism as described in claim 2, characterized in that, The first stop structure includes a first stop surface facing the base, and the second stop structure includes a second stop surface. When the folding mechanism is in a folded state, the first stop surface and the second stop surface cooperate to stop the first stop structure.

4. The folding mechanism as described in claim 3, characterized in that, The first stop structure includes a first stop boss, and the first stop surface is disposed on the side of the first stop boss near the base. The second stop structure includes a second stop boss, and the second stop surface is disposed on the side of the second stop boss away from the base.

5. The folding mechanism as described in claim 3, characterized in that, The first stop structure includes a first stop groove, the first inner wall surface of the first stop groove is the first stop surface, and the second stop structure includes a third stop boss, the third stop boss is provided with a third stop surface on the side away from the base. When the folding mechanism is in the folded state, the first stop surface and the second stop surface cooperate to stop the first stop structure.

6. The folding mechanism as described in claim 5, characterized in that, The second inner wall surface of the first stop groove is the fourth stop surface, and the second inner wall surface is disposed opposite to the first inner wall surface. The third stop boss has a fifth stop surface on the side near the base. When the folding mechanism is in the folded state, the fifth stop surface blocks the fourth stop surface to restrict the sliding door panel from moving away from the base.

7. The folding mechanism as described in claim 1, characterized in that, The inner wall of the base is provided with a first limiting slope. The first limiting slope gradually slopes towards the inside of the base from the edge of the base toward the central axis of the base. A limiting part is provided on the side of the sliding door panel near the base. When the folding mechanism is in the folded state, the limiting part is directly opposite the first limiting slope.

8. The folding mechanism as described in claim 7, characterized in that, The limiting part is a second limiting inclined surface, and the second limiting inclined surface has the same inclination angle as the first limiting inclined surface.

9. The folding mechanism as described in claim 1, characterized in that, The connecting block is provided with a first X-direction guide portion, and the sliding door panel is provided with a second X-direction guide portion. The first X-direction guide portion and the second X-direction guide portion cooperate to guide the sliding of the sliding door panel in the width direction of the connecting block; wherein, the X-direction is the width direction of the connecting block.

10. The folding mechanism as described in claim 9, characterized in that, The first swing arm is provided with a first guide structure, and the sliding door panel is provided with a second guide structure. During the movement of the first swing arm, the first swing arm is driven by the cooperation of the first guide structure and the second guide structure to drive the sliding door panel to slide.

11. The folding mechanism as described in claim 10, characterized in that, The connecting block is provided with a Y-direction guide groove, which forms a slot in the direction close to the first swing arm. The first swing arm is provided with a Y-direction guide structure, which passes through the slot and is inserted into the Y-direction guide groove, and can slide along the Y direction.

12. The folding mechanism as described in claim 9, characterized in that, The base is provided with a first helical driving surface, and the first swing arm is provided with a first helical transmission surface. The first helical driving surface and the first helical transmission surface abut against each other and are adapted to each other. During the rotation of the first swing arm, the first helical driving surface and the first helical transmission surface cooperate to drive the first swing arm to move along the length direction of the base.

13. The folding mechanism as described in claim 12, characterized in that, The base is provided with a second helical driving surface, the helical direction of the second helical driving surface is the same as that of the first helical driving surface, and they are arranged opposite to each other; the first swing arm is provided with a second helical transmission surface, the helical direction of the second helical transmission surface is the same as that of the first helical transmission surface, the second helical driving surface and the second helical transmission surface abut against each other and are adapted to each other, during the rotation of the first swing arm, the first helical driving surface and the first helical transmission surface cooperate to drive the first swing arm to rotate while moving along the length direction of the base.

14. The folding mechanism as described in claim 11, characterized in that, The first guide structure includes a guide protrusion, and the second guide structure includes a path groove. The path groove is disposed in the Y-direction guide structure, and the guide protrusion is movably inserted into the path groove. The path groove is inclined along the Y direction. When the folding mechanism is in the folded state, the guide protrusion is located at one end of the path groove closer to the central axis of the base. When the folding mechanism is in the flattened state, the guide protrusion is located at one end of the path groove away from the central axis of the base.

15. The folding mechanism as described in claim 14, characterized in that, The path groove includes a first path segment and a second path segment. The inclination angle of the second path segment is greater than that of the first path segment. When the folding mechanism is in the folded state, the guide protrusion is located in the first path segment. When the folding mechanism is in the flattened state, the guide protrusion is located in the second path segment.

16. The folding mechanism as described in any one of claims 1 to 15, characterized in that, The swing arm assembly also includes a second swing arm, which is rotatably mounted on the base and connected to the connecting block.

17. A foldable electronic device, characterized in that, Includes the folding mechanism as described in any one of claims 1-16.

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