Folding mechanism and electronic equipment

Abstract

The present application discloses a folding mechanism and an electronic device. The folding mechanism includes a main shaft, a first connecting arm, a first pin shaft, a first gear, a first fitting part, a second fitting part, a third fitting part and a first elastic part. During the unfolding or folding process of the electronic device, the first elastic part can be deformed, and the first elastic part can squeeze the first fitting part. The first fitting part can apply a force to the first gear. In this way, the friction between the first gear and the first fitting part can be greatly increased. The speed at which the first gear rotates relative to the main shaft slows down, the speed at which the first connecting arm rotates relative to the main shaft slows down, and the speed at which the first shell rotates relative to the main shaft slows down. Therefore, the folding mechanism can reduce the rotation speed of the first shell, thereby protecting the flexible screen of the electronic device and improving the reliability of the flexible screen of the electronic device.

Description

Technical Field

[0001] The present application relates to the technical field of foldable electronic products, and in particular to a folding mechanism and electronic equipment. Background Art

[0002] Folding phones are becoming increasingly popular among users due to their large display area in the flattened state and miniaturization in the folded state. Traditional folding phones include a flexible screen, a first shell, a second shell, and a folding mechanism. The first shell and the second shell are used to support the flexible screen. The folding mechanism connects the first shell and the second shell. The folding mechanism is used to make the first shell and the second shell unfold or fold relative to each other, and to make the flexible screen unfold or fold. However, during the folding or unfolding process, the traditional folding mechanism is prone to improper user operation, causing the first shell and the second shell to unfold or fold at a faster speed, thereby damaging the flexible screen. Summary of the Invention

[0003] The present application provides a folding mechanism and an electronic device. The folding mechanism can be used in a folding device of an electronic device. The electronic device may also include a flexible screen mounted on the folding device. During the unfolding or folding process, the folding mechanism can reduce the folding or unfolding speed of the first and second shells, thereby protecting the flexible screen, improving the reliability of the flexible screen, and extending the service life of the flexible screen and the electronic device.

[0004] In a first aspect, the present application provides an electronic device. The electronic device includes a folding mechanism, a first housing, and a second housing. The folding mechanism connects the first housing and the second housing. The folding mechanism includes a main shaft, a first connecting arm, a first pin, a first gear, a first mating member, a second mating member, a third mating member, and a first elastic member. The first connecting arm includes a sliding end and a rotating end.

[0005] The sliding end of the first connecting arm is slidably connected to the first shell, and the rotating end of the first connecting arm is rotatably connected to the main shaft.

[0006] The first pin is rotatably connected to the main shaft. The first gear and the third mating member are fixedly connected to the first pin and are spaced apart from each other. The first gear meshes with the rotating end of the first connecting arm. The first mating member and the second mating member are located between the first gear and the third mating member and are both slidably connected to the first pin. The first mating member and the first gear form a cam structure. The second mating member and the third mating member form a cam structure. One end of the first elastic member abuts the first mating member, and the other end abuts the second mating member. The first elastic member is in a compressed state.

[0007] During the folding or flattening process of the electronic device, the first mating piece and the second mating piece slide relative to the first pin shaft, and the sliding directions of the first mating piece and the second mating piece are opposite.

[0008] It is understandable that during the unfolding or folding process of the electronic device, the first elastic member may be deformed, and the first elastic member may squeeze the first mating member. The first mating member may apply a force to the first gear. In this way, the friction between the first gear and the first mating member may be increased to a large extent. The speed at which the first gear rotates relative to the main shaft slows down, the speed at which the first connecting arm rotates relative to the main shaft slows down, and the speed at which the first shell rotates relative to the main shaft slows down. Therefore, during the process of the electronic device unfolding to enter the open state and folding to release the open state, a certain resistance is provided, so that the user can experience a better sense of mechanical operation.

[0009] Furthermore, during the unfolding or folding process of the electronic device, the first elastic member can generate a first deformation a through the cooperation of the first gear and the first mating member, and can also generate a second deformation through the cooperation of the third mating member and the second mating member. Thus, during the unfolding or folding process of the electronic device, the first elastic member can generate two superimposed deformations at once, i.e., the total deformation is a + b, and the first elastic member can generate a larger deformation at once.

[0010] In addition, the two ends of the rotating end of the first connecting arm do not need to form a cam structure with other components to realize the one-time generation of the total deformation amount a+b of the first elastic member. In this way, the two ends of the rotating end of the first connecting arm no longer need to be provided with a group of protrusions, and the length of the rotating end of the first connecting arm can be miniaturized. When the rotating end of the first connecting arm is rotatably connected to the main shaft, the size of the main shaft in the Y-axis direction can also be miniaturized. In particular, for folding mechanisms with more complex structures, since they occupy a large space, at this time, if the structure of some components of the folding mechanism can be miniaturized, this is better for the arrangement of the folding mechanism in a limited space, and it is also better for the miniaturized design of electronic equipment.

[0011] Furthermore, during the unfolding or folding process of the electronic device, the first gear is fixedly connected to the first pin. The first gear is fixed relative to the first pin. Thus, compared to a solution in which the first gear slides relative to the first pin, the first gear of this embodiment is more stable, thereby improving the stability of the folding mechanism.

[0012] In one achievable manner, the second mating member includes a second protrusion, the third mating member includes a third protrusion, and the second mating member and the third mating member form a cam structure, including: the second mating member and the third mating member form the cam structure via the second protrusion and the third protrusion.

[0013] It is understandable that the second mating member and the third mating member form a cam structure through the second protrusion and the third protrusion, so that the structure of the second mating member and the third mating member is relatively simple, thereby simplifying the structure of the folding mechanism.

[0014] In one achievable manner, during the folding or unfolding process of the electronic device, the rotating end of the first connecting arm, the first gear, the third matching member, and the first pin shaft all rotate relative to the main shaft.

[0015] In one achievable embodiment, the third mating component is provided with a third pin hole. The third pin hole includes a first wall and a second wall disposed oppositely, and a third wall and a fourth wall disposed oppositely. The third wall and the fourth wall are connected between the first wall and the second wall. The first wall and the second wall are both planar. The third wall and the fourth wall are both curved. The first pin is inserted into the third pin hole. Partial surfaces of the first pin engage with the first, second, third, and fourth walls of the third pin hole.

[0016] It is understood that the third mating member is fixedly connected to the first pin by the mutual engagement of a portion of the surface of the first pin with the first, second, third, and fourth walls of the third pin hole. Thus, the connection between the third mating member and the first pin is relatively simple, thereby simplifying the structure of the folding mechanism.

[0017] In one achievable embodiment, the first gear has a first pin hole. The first pin hole includes a first wall and a second wall disposed oppositely, and a third wall and a fourth wall disposed oppositely. The third wall and the fourth wall are connected between the first wall and the second wall. The first wall and the second wall are both flat. The third wall and the fourth wall are both curved. The first pin is inserted into the first pin hole. Part of the surface of the first pin engages with the first wall, the second wall, the third wall, and the fourth wall of the first pin hole.

[0018] It is understood that the first gear is fixedly connected to the first pin by the mutual cooperation of a portion of the surface of the first pin and the first, second, third, and fourth walls of the first pin hole. In this way, the connection between the first gear and the first pin is relatively simple, thereby simplifying the structure of the folding mechanism.

[0019] In one achievable embodiment, the folding mechanism further includes a second connecting arm, a second pin, a second gear, a fourth fitting, and a second elastic member. The second connecting arm includes a sliding end and a rotating end. The sliding end of the second connecting arm is slidably connected to the second housing. The rotating end of the second connecting arm is rotationally connected to the main shaft. The second pin is rotationally connected to the main shaft and is located between the first pin and the rotating end of the second connecting arm. The first fitting and the second fitting are also slidably connected to the second pin. The second gear and the fourth fitting are fixedly connected to the second pin and are spaced apart from each other. The second gear meshes with both the first gear and the rotating end of the second connecting arm. The second gear is located on the side of the first fitting away from the second fitting. The second gear and the first fitting form a cam structure. The fourth fitting is located on the side of the second fitting away from the first fitting. The fourth fitting and the second fitting form a cam structure. One end of the second elastic member abuts against the first fitting, and the other end abuts against the second fitting, and the second elastic member is in a compressed state.

[0020] It is understandable that during the unfolding or folding process of the electronic device, the second elastic member can cooperate with the first elastic member to deform together, and the second elastic member and the first elastic member can jointly squeeze the first matching member so that the first matching member applies a force to the first gear and the second gear. In this way, the friction between the first gear, the second gear and the first matching member can be greatly increased. The speed at which the first gear and the second gear rotate relative to the main shaft slows down, the speed at which the first connecting arm and the second connecting arm rotate relative to the main shaft slows down, and the speed at which the first shell and the second shell rotate relative to the main shaft slows down. Therefore, during the process of the electronic device unfolding to enter the open state and folding to release the open state, a certain resistance is provided so that the user can experience a better sense of mechanical operation.

[0021] Furthermore, during the unfolding or folding process of the electronic device, the second elastic member and the first elastic member can produce a first deformation a through the cooperation of the first and second gears with the first mating member, and can also produce a second deformation b through the cooperation of the third and fourth mating members with the second mating member. Thus, during the unfolding or folding process of the electronic device, the second elastic member and the first elastic member can produce two superimposed deformations at once, i.e., the total deformation is a + b, and the second elastic member and the first elastic member can produce a larger deformation at once.

[0022] Furthermore, the two ends of the second connecting arm's rotating end no longer need to form a cam structure with other components to achieve the combined deformation of the second elastic member and the first elastic member simultaneously generating the total deformation amount a + b. Thus, the two ends of the second connecting arm's rotating end no longer need to be provided with a set of bumps, allowing the length of the second connecting arm's rotating end to be miniaturized. When the second connecting arm's rotating end is rotatably connected to the main shaft, the main shaft's size in the Y-axis direction can also be miniaturized.

[0023] It is understood that during the unfolding or folding process of the electronic device, the second gear is fixedly connected to the second pin, and the position of the second gear relative to the second pin is fixed. Thus, compared to a solution in which the second gear slides relative to the second pin, the second gear 364 of this embodiment is more stable, which helps to improve the stability of the folding mechanism.

[0024] In one achievable embodiment, the main shaft includes a base and a first housing. The base is provided with a first rotation axis groove and a second rotation axis groove arranged opposite to each other. One end of the first pin is rotatably connected to the first rotation axis groove, and the other end is rotatably connected to the second rotation axis groove. The first housing and the base are arranged to form an accommodating space. The rotating end of the first connecting arm, the first pin, the first gear, the first mating part, the second mating part, the third mating part, and the first elastic part are arranged in the accommodating space. In this way, the rotating end of the first connecting arm, the first pin, the first gear, the first mating part, the second mating part, the third mating part, and the first elastic part are not easily dislodged from the main shaft, which means that the stability of the folding mechanism is better.

[0025] In one achievable embodiment, the first pin includes a first limiting flange. The first gear abuts against the first limiting flange. The first limiting flange abuts against a first wall of the base. The first wall is connected to a wall of the first rotating shaft groove. The third mating member abuts against a second wall of the base. The second wall is connected to a wall of the second rotating shaft groove. In this way, the first wall and the second wall can limit the sliding of the first pin, thereby improving the stability of the first gear, the first mating member, the second mating member, the third mating member, and the first elastic member.

[0026] In one practicable manner, one end of the first pin abuts against the groove wall of the first rotating shaft groove, and the other end abuts against the groove wall of the second rotating shaft groove. In this way, the groove wall of the first rotating shaft groove and the second rotating shaft groove can limit the sliding of the first pin.

[0027] In one achievable embodiment, the folding mechanism further includes a fixing member fixedly connected between the base and the first housing. The fixing member is provided with a first limiting hole. At least a portion of the first pin is inserted into the first limiting hole and rotates relative to the first limiting hole.

[0028] It is understood that by providing a fixing member between the first housing and the base, the first pin is limited in position by the first limiting hole. This prevents the first gear, first mating member, second mating member, third mating member, and first elastic member provided on the first pin from shaking, thereby improving stability. Furthermore, during the folding or flattening process of the electronic device, the first pin, first gear, first mating member, second mating member, third mating member, and first elastic member are less likely to squeeze the first housing, thereby causing it to detach from the base.

[0029] In one feasible manner, the fixing member is further provided with a second limiting hole. The second limiting hole is spaced apart from the first limiting hole. At least a portion of the second pin is inserted into the second limiting hole and rotates relative to the second limiting hole. It is understandable that the second limiting hole can limit the second pin. In this way, the second gear, the first mating part, the second mating part, the fourth mating part and the second elastic part arranged on the second pin are not easy to shake, that is, the stability is better. In addition, during the folding process or the flattening process of the electronic device, the second pin, the second gear, the first mating part, the second mating part, the fourth mating part and the second elastic part are not easy to squeeze the first shell, so that the first shell is separated from the base.

[0030] In one achievable manner, the folding mechanism further includes a first fixing frame, a second fixing frame, a first transmission arm, a first connecting rod, a second transmission arm, and a second connecting rod. The first fixing frame is fixed to the first housing. The second fixing frame is fixed to the second housing.

[0031] The first transmission arm is rotatably and slidably connected to the main shaft. The first transmission arm is connected to the rotating end of the first connecting arm via a helical substructure. One end of the first connecting rod is rotatably connected to the first transmission arm, and the other end is rotatably connected to the first fixed frame. The second transmission arm is rotatably and slidably connected to the main shaft, and the second transmission arm is connected to the rotating end of the second connecting arm via a helical substructure. One end of the second connecting rod is rotatably connected to the second transmission arm, and the other end is rotatably connected to the second fixed frame.

[0032] In one achievable embodiment, the folding mechanism further comprises a sliding block, a first screw rod, and a second screw rod. The sliding block is slidably connected to the main shaft. The first transmission arm is rotatably connected to the sliding block. The sliding block has a first protrusion and a second protrusion disposed in opposite directions.

[0033] The first screw rod is rotatably connected to the main shaft. One end of the first screw rod is fixed to the rotating end of the first connecting arm. The first screw rod is provided with a first spiral groove. The first spiral groove extends spirally along the extension direction of the main shaft. At least a portion of the first protrusion is slidably mounted in the first spiral groove.

[0034] The second screw rod is rotatably connected to the main shaft. One end of the second screw rod is fixed to the rotating end of the second connecting arm. The second screw rod is provided with a second spiral groove. The second spiral groove extends spirally along the extension direction of the main shaft. At least a portion of the second protrusion is slidably connected to the second spiral groove.

[0035] In one conceivable embodiment, the folding mechanism further includes a first swing arm and a second swing arm. The first swing arm includes a rotating end and a sliding end. The rotating end of the first swing arm is rotatably connected to the main shaft. The sliding end of the first swing arm is slidably connected to the first fixed frame. The second swing arm includes a rotating end and a sliding end. The rotating end of the second swing arm is rotatably connected to the main shaft. The sliding end of the second swing arm is slidably connected to the second fixed frame.

[0036] In one embodiment, the folding mechanism further includes a first support plate and a second support plate. The first support plate is slidably and rotatably connected to the sliding end of the first swing arm. The first support plate is rotatably connected to the first fixed frame. The second support plate is slidably and rotatably connected to the sliding end of the second swing arm. The second support plate is rotatably connected to the second fixed frame.

[0037] When the electronic device is in a flat state, the first support plate and the second support plate are respectively located on both sides of the main shaft. When the electronic device is in a closed state, the first support plate and the second support plate are arranged opposite to each other.

[0038] In one embodiment, the folding mechanism further includes a third fixing frame, a fourth fixing frame, a third swing arm, a fourth swing arm, a second retaining member, a plurality of elastic members, and a fixing plate. The third fixing frame is fixed to the first housing. The fourth fixing frame is fixed to the second housing. The sliding end of the third swing arm is slidably connected to the third fixing frame. The rotating end of the third swing arm is rotatably connected to the main shaft.

[0039] The sliding end of the fourth swing arm is slidably connected to the fourth fixing frame. The rotating end of the fourth swing arm is rotatably connected to the main shaft.

[0040] The second retaining member is located on one side of the rotating ends of the third and fourth swing arms. The second retaining member is slidably connected to the main shaft and forms a cam structure with the rotating ends of the third and fourth swing arms. A fixed plate is located on the side of the second retaining member away from the rotating ends of the third and fourth swing arms. The fixed plate is slidably connected to the main shaft.

[0041] One end of the plurality of elastic members abuts against the second clamping member, and the other end abuts against the fixing plate. The elastic members are in a compressed state.

[0042] In one practicable embodiment, the folding mechanism further includes a first retaining member, a first transfer shaft, and a second transfer shaft. The rotating ends of the third and fourth swing arms are located between the first retaining member and the second retaining member. The first retaining member, the rotating ends of the third and fourth swing arms, and the rotating ends of the third and fourth swing arms each form a cam structure.

[0043] The first retaining member, the first adapter shaft, and the second adapter shaft are all slidably connected to the main shaft. The first adapter shaft sequentially passes through the first retaining member, the rotating end of the third swing arm, the second retaining member, an elastic member, and a fixed plate. The first retaining member and the fixed plate are fixed to the first adapter shaft, while the rotating end of the third swing arm and the second retaining member are slidably connected to the first adapter shaft.

[0044] The second adapter shaft sequentially passes through the first retaining member, the rotating end of the fourth swing arm, the second retaining member, an elastic member, and the fixing plate. The first retaining member and the fixing plate are also fixed to the second adapter shaft. The rotating end of the fourth swing arm and the second retaining member are slidably connected to the second adapter shaft.

[0045] In a second aspect, the present application provides a folding mechanism. The folding mechanism includes a main shaft, a first connecting arm, a first pin shaft, a first gear, a first fitting member, a second fitting member, a third fitting member, and a first elastic member. The rotating end of the first connecting arm is rotatably connected to the main shaft. The first pin shaft is rotatably connected to the main shaft. The first gear and the third fitting member are fixedly connected to the first pin shaft and are spaced apart from each other. The first gear is engaged with the rotating end of the first connecting arm. The first fitting member and the second fitting member are located between the first gear and the third fitting member, and are both slidably connected to the first pin shaft. The first fitting member and the first gear form a cam structure. The second fitting member and the third fitting member form a cam structure. One end of the first elastic member abuts against the first fitting member, and the other end abuts against the second fitting member. The first elastic member is in a compressed state.

[0046] During the folding or flattening process of the folding mechanism, the first matching member and the second matching member slide relative to the first pin shaft, and the sliding directions of the first matching member and the second matching member are opposite.

[0047] It is understandable that during the unfolding or folding process of the folding mechanism, the first elastic member may be deformed, and the first elastic member may squeeze the first matching member. The first matching member may apply a force to the first gear. In this way, the friction between the first gear and the first matching member may be increased to a large extent. The speed at which the first gear rotates relative to the main shaft slows down, and the speed at which the first connecting arm rotates relative to the main shaft slows down. When the folding mechanism is applied to an electronic device, the speed at which the first shell rotates relative to the main shaft also slows down. Therefore, during the process of the electronic device unfolding to enter the open state and folding to release the open state, a certain resistance is provided, so that the user can experience a better sense of operation of the mechanism.

[0048] Furthermore, during the unfolding or folding process of the folding mechanism, the first elastic member can generate a first deformation a through the cooperation of the first gear and the first mating member, and can also generate a second deformation through the cooperation of the third mating member and the second mating member. Thus, during the unfolding or folding process of the folding mechanism, the first elastic member can generate two superimposed deformations at once, i.e., the total deformation is a + b, and the first elastic member can generate a larger deformation at once.

[0049] Furthermore, the two ends of the rotating end of the first connecting arm no longer need to form a cam structure with other components to achieve the first elastic member's one-time generation of the total deformation a + b. Thus, the two ends of the rotating end of the first connecting arm no longer need to be provided with a set of bumps, allowing the length of the rotating end of the first connecting arm to be miniaturized. When the rotating end of the first connecting arm is rotatably connected to the main shaft, the main shaft's size in the Y-axis direction can also be miniaturized.

[0050] Furthermore, during the unfolding or folding process of the folding mechanism, the first gear is fixedly connected to the first pin. The first gear is fixed relative to the first pin. Thus, compared to a solution in which the first gear slides relative to the first pin, the first gear of this embodiment is more stable, thereby improving the stability of the folding mechanism.

[0051] In one achievable manner, the second mating member includes a second protrusion, the third mating member includes a third protrusion, and the second mating member and the third mating member form a cam structure, including: the second mating member and the third mating member form the cam structure via the second protrusion and the third protrusion.

[0052] In one achievable manner, during the folding or unfolding process of the electronic device, the rotating end of the first connecting arm, the first gear, the third matching member, and the first pin shaft rotate relative to the main shaft.

[0053] In one achievable embodiment, the third mating component is provided with a third pin hole. The third pin hole includes a first wall and a second wall disposed oppositely, and a third wall and a fourth wall disposed oppositely. The third wall and the fourth wall are connected between the first wall and the second wall. The first wall and the second wall are both planar. The third wall and the fourth wall are both curved.

[0054] The first pin is inserted into the third pin hole. Part of the surface of the first pin matches the first wall, the second wall, the third wall and the fourth wall of the third pin hole.

[0055] In an achievable manner, the folding mechanism further includes a second connecting arm, a second pin shaft, a second gear, a fourth matching member, and a second elastic member. The rotating end of the second connecting arm is rotatably connected to the main shaft.

[0056] The second pin is rotatably connected to the main shaft and is located between the first pin and the rotating end of the second connecting arm. The first fitting and the second fitting are also slidably connected to the second pin. The second gear and the fourth fitting are fixedly connected to the second pin and are spaced apart from each other. The second gear is engaged with the first gear and the rotating end of the second connecting arm. The second gear is located on the side of the first fitting away from the second fitting. The second gear and the first fitting form a cam structure. The fourth fitting is located on the side of the second fitting away from the first fitting. The fourth fitting and the second fitting form a cam structure. One end of the second elastic member abuts against the first fitting, and the other end abuts against the second fitting. The second elastic member is in a compressed state.

[0057] It is understandable that during the unfolding or folding process of the folding mechanism, the second elastic member can cooperate with the first elastic member to deform together, and the second elastic member and the first elastic member can jointly squeeze the first matching member so that the first matching member applies a force to the first gear and the second gear. In this way, the friction between the first gear, the second gear and the first matching member can be greatly increased. The speed at which the first gear and the second gear rotate relative to the main shaft slows down, and the speed at which the first connecting arm and the second connecting arm rotate relative to the main shaft slows down. When the folding mechanism is applied to an electronic device, the speed at which the first shell and the second shell rotate relative to the main shaft slows down. Therefore, during the process of the electronic device unfolding to enter the open state and folding to release the open state, a certain resistance is provided, so that the user can experience a better sense of operation of the mechanism.

[0058] Furthermore, during the unfolding or folding process of the folding mechanism, the second elastic member and the first elastic member can produce a first deformation a through cooperation with the first gear, the second gear, and the first mating member, and can also produce a second deformation b through cooperation with the third mating member, the fourth mating member, and the second mating member. Thus, during the unfolding or folding process of the electronic device, the second elastic member and the first elastic member can produce two superimposed deformations at once, i.e., the total deformation is a + b, and the second elastic member and the first elastic member can produce a larger deformation at once.

[0059] Furthermore, the two ends of the second connecting arm's rotating end no longer need to form a cam structure with other components to achieve the combined deformation of the second elastic member and the first elastic member simultaneously generating the total deformation amount a + b. Thus, the two ends of the second connecting arm's rotating end no longer need to be provided with a set of bumps, allowing the length of the second connecting arm's rotating end to be miniaturized. When the second connecting arm's rotating end is rotatably connected to the main shaft, the main shaft's size in the Y-axis direction can also be miniaturized.

[0060] It is understood that during the unfolding or folding process of the folding mechanism, the second gear is fixedly connected to the second pin, and the position of the second gear relative to the second pin is fixed. Thus, compared to a solution in which the second gear slides relative to the second pin, the second gear 364 of this embodiment is more stable, which helps to improve the stability of the folding mechanism.

[0061] In one achievable embodiment, the main shaft includes a base and a first housing. The base is provided with a first rotation axis groove and a second rotation axis groove arranged opposite to each other. One end of the first pin is rotatably connected to the first rotation axis groove, and the other end is rotatably connected to the second rotation axis groove. The first housing and the base are arranged to form an accommodating space. The rotating end of the first connecting arm, the first pin, the first gear, the first mating part, the second mating part, the third mating part, and the first elastic part are arranged in the accommodating space. In this way, the rotating end of the first connecting arm, the first pin, the first gear, the first mating part, the second mating part, the third mating part, and the first elastic part are not easily dislodged from the main shaft, which means that the stability of the folding mechanism is better.

[0062] In one achievable embodiment, the first pin includes a first limiting flange. The first gear abuts against the first limiting flange. The first limiting flange abuts against a first wall of the base. The first wall is connected to a wall of the first rotating shaft groove. The third mating member abuts against a second wall of the base. The second wall is connected to a wall of the second rotating shaft groove. In this way, the first wall and the second wall can limit the sliding of the first pin, thereby improving the stability of the first gear, the first mating member, the second mating member, the third mating member, and the first elastic member.

[0063] In one achievable manner, one end of the first pin abuts against the groove wall of the first rotating shaft groove, and the other end abuts against the groove wall of the second rotating shaft groove.

[0064] In one achievable embodiment, the folding mechanism further includes a fixing member fixedly connected between the base and the first housing. The fixing member is provided with a first limiting hole. At least a portion of the first pin is inserted into the first limiting hole and rotates relative to the first limiting hole.

[0065] It is understood that by providing a fixing member between the first housing and the base, the first pin is limited in position by the first limiting hole. This prevents the first gear, first mating member, second mating member, third mating member, and first elastic member provided on the first pin from shaking, thereby enhancing stability. Furthermore, during the folding or flattening process of the folding mechanism, the first pin, first gear, first mating member, second mating member, third mating member, and first elastic member are less likely to squeeze the first housing, thereby causing it to separate from the base.

[0066] In one feasible manner, the fixing member is further provided with a second limiting hole. The second limiting hole is spaced apart from the first limiting hole. At least a portion of the second pin is inserted into the second limiting hole and rotates relative to the second limiting hole. It is understandable that the second limiting hole can limit the second pin. In this way, the second gear, the first mating part, the second mating part, the fourth mating part and the second elastic part arranged on the second pin are not easy to shake, that is, the stability is better. In addition, during the folding process or flattening process of the folding mechanism, the second pin, the second gear, the first mating part, the second mating part, the fourth mating part and the second elastic part are not easy to squeeze the first shell, so that the first shell is separated from the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 This is a schematic structural diagram of an electronic device in a flattened state provided by an embodiment of the present application;

[0068] Figure 2 yes Figure 1 a partially exploded schematic diagram of the electronic device shown;

[0069] Figure 3 yes Figure 1 A schematic diagram of the structure of the electronic device shown is in a closed state;

[0070] Figure 4 yes Figure 3 A partial cross-sectional schematic diagram of the electronic device shown at line A1-A1;

[0071] Figure 5 yes Figure 2 A partially exploded schematic diagram of the folding device shown;

[0072] Figure 6 yes Figure 5 A partially exploded schematic diagram of the folding mechanism shown;

[0073] Figure 7 yes Figure 6 A partially exploded schematic diagram of one embodiment of the spindle is shown;

[0074] Figure 8 yes Figure 7 The schematic diagram of the structure of the base shown is at another angle;

[0075] Figure 9 yes Figure 7 A schematic structural diagram of the first end portion of the base shown;

[0076] Figure 10a yes Figure 9 A schematic structural diagram of the first end portion shown at another angle;

[0077] Figure 10b yes Figure 10a An enlarged schematic diagram of the first end portion shown at M1;

[0078] Figure 10c yes Figure 9 An enlarged schematic diagram of the first end portion shown at M2;

[0079] Figure 10d yes Figure 6 A schematic diagram of a partial structure of the main shaft shown;

[0080] Figure 11 yes Figure 6 A schematic structural diagram of the first fixing frame and the second fixing frame shown;

[0081] Figure 12 yes Figure 11 The schematic structural diagram of the first fixing frame and the second fixing frame shown is shown at another angle;

[0082] Figure 13 yes Figure 2 A partial structural schematic diagram of the folding device shown;

[0083] Figure 14 yes Figure 6 A schematic structural diagram of the first connecting arm and the second connecting arm shown;

[0084] Figure 15 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0085] Figure 16 yes Figure 15 A schematic cross-sectional view of a portion of the folding mechanism shown at line A2-A2;

[0086] Figure 17 yes Figure 6 An exploded schematic diagram of the damping member shown;

[0087] Figure 18 yes Figure 17 The schematic structural diagram of the first pin and the second pin at another angle is shown;

[0088] Figure 19 yes Figure 17 The schematic diagrams of the structure of the first gear and the second gear at different angles are shown;

[0089] Figure 20 yes Figure 6 A partial structural diagram of the damping member shown;

[0090] Figure 21 yes Figure 17 The schematic structural diagrams of the first matching member shown are at different angles;

[0091] Figure 22a yes Figure 6 A partial structural diagram of the damping member shown;

[0092] Figure 22b yes Figure 22a A schematic cross-sectional view of a portion of the damping element at line C1-C1 is shown;

[0093] Figure 23 yes Figure 17 Schematic diagrams of the structure of the second matching member at different angles are shown;

[0094] Figure 24a yes Figure 6 A partial structural diagram of the damping member shown;

[0095] Figure 24b yes Figure 24a A schematic cross-sectional view of a portion of the damping element at line C2-C2 is shown;

[0096] Figure 25 yes Figure 17 Schematic diagrams of the structures of the third matching member and the fourth matching member at different angles are shown;

[0097] Figure 26 yes Figure 6 An enlarged schematic diagram of the damping member shown;

[0098] Figure 27 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0099] Figure 28 yes Figure 5 A partial cross-sectional schematic diagram of the folding mechanism shown;

[0100] Figure 29 yes Figure 27 A schematic structural diagram of the partially folding mechanism shown in a closed state;

[0101] Figure 30a yes Figure 5 A partial cross-sectional schematic diagram of the folding mechanism shown in another embodiment;

[0102] Figure 30b yes Figure 30a A schematic structural diagram of a fixing member of the folding mechanism shown;

[0103] Figure 30c yes Figure 5 A partial cross-sectional schematic diagram of a folding mechanism in yet another embodiment is shown;

[0104] Figure 31 yes Figure 6 An exploded schematic diagram of the first subassembly shown;

[0105] Figure 32 yes Figure 31 A schematic structural diagram of the first spiral rod and the second spiral rod of the first subassembly shown;

[0106] Figure 33 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0107] Figure 34 yes Figure 31 A schematic structural diagram of the sliding block of the first subassembly shown;

[0108] Figure 35 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0109] Figure 36 yes Figure 31 A schematic structural diagram of the first transmission arm of the first subassembly shown;

[0110] Figure 37 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0111] Figure 38 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0112] Figure 39 yes Figure 38 A schematic structural diagram of the partially folding mechanism shown in a closed state;

[0113] Figure 40 yes Figure 6 An exploded schematic diagram of the second subassembly is shown;

[0114] Figure 41 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0115] Figure 42 yes Figure 6 The structural schematic diagram of the first swing arm and the second swing arm shown;

[0116] Figure 43 yes Figure 6 A schematic structural diagram of the first support plate and the second support plate shown;

[0117] Figure 44 yes Figure 43 An enlarged schematic diagram of the first support plate at position B is shown;

[0118] Figure 45 yes Figure 5 A partial structural exploded schematic diagram of the folding mechanism shown;

[0119] Figure 46 yes Figure 45 The structural schematic diagram of the third swing arm and the fourth swing arm shown;

[0120] Figure 47 yes Figure 5 A partial structural diagram of the folding mechanism shown;

[0121] Figure 48 yes Figure 45 An exploded schematic diagram of the auxiliary damping member is shown. DETAILED DESCRIPTION

[0122] The following embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0123] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" can be a connection between each other and the relative position relationship remains unchanged after the connection. "Rotational connection" can be a connection between each other and can rotate relative to each other after the connection. "Sliding connection" can be a connection between each other and can slide relative to each other after the connection. "Rolling" can be a composite motion of rotation and displacement. The directional terms mentioned in the embodiments of the present application, such as "top", "bottom", "inside", "outside", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0124] See also Figures 1 to 4 , Figure 1 It is a structural schematic diagram of the electronic device 100 provided in an embodiment of the present application in a flattened state. Figure 2 yes Figure 1 FIG. 1 is a partially exploded schematic diagram of the electronic device 100 . Figure 3 yes Figure 1 The electronic device 100 is shown as a schematic structural diagram in a closed state. Figure 4 yes Figure 3 The electronic device 100 is shown as a partial cross-sectional schematic diagram along line A1 - A1 .

[0125] The electronic device 100 includes a flexible screen 2 and a folding device 3. The flexible screen 2 is used to display images. The flexible screen 2 is fixedly connected to the folding device 3. The folding device 3 can make the flexible screen 2 unfold or fold, so that the electronic device 100 can be converted between a flat state and a closed state. It should be understood that when the electronic device 100 is in a flat state, the folding device 3 is also in a flat state accordingly. When the electronic device 100 is in a closed state, the folding device 3 is also in a closed state accordingly. In this way, when the electronic device 100 is in a flat state, the electronic device 100 has a larger display area and the user's viewing experience is better. When the electronic device 100 is in a closed state, the plane size of the electronic device 100 is smaller, which is convenient for the user to carry. Among them, the electronic device 100 can be a foldable electronic product such as a mobile phone, a tablet computer, a personal computer, and a laptop computer. Figures 1 to 4 The electronic device 100 of the illustrated embodiment is described by taking a mobile phone as an example.

[0126] For ease of description, for example, the thickness direction of the electronic device 100 is defined as the Z-axis direction, and the extension direction of the rotation axis of the electronic device 100 is the Y-axis direction, that is, the width direction of the electronic device 100 is the Y-axis direction. The direction perpendicular to the Y-axis direction and the Z-axis direction is the X-axis direction, that is, the length direction of the electronic device 100 is the X-axis. It can be understood that the coordinate system of the electronic device 100 can also be flexibly set according to specific needs. In this embodiment, when the direction of the rotation axis of the electronic device 100 is the Y-axis direction, the folding device 3 can make the flexible screen 2 relatively unfolded or folded along the Y-axis direction. In this way, when the electronic device 100 is in a closed state, the size of the electronic device 100 in the X-axis direction becomes smaller.

[0127] See also Figure 5 , and combined with Figures 1 to 4 As shown, Figure 5 yes Figure 2 The folding device 3 is shown as a partially exploded schematic diagram. The folding device 3 includes a folding mechanism 301, a first shell 302, and a second shell 303. The folding mechanism 301 is connected between the first shell 302 and the second shell 303. The folding mechanism 301 is used to expand or fold the first shell 302 and the second shell 303 relative to each other.

[0128] like Figure 1 and Figure 2 As shown, when the first housing 302 and the second housing 303 are relatively unfolded to a flat state, the electronic device 100 is in a flat state, and the first housing 302 and the second housing 303 can be 180 degrees apart. In other embodiments, the first housing 302 and the second housing 303 can also have a slight deviation from 180 degrees, such as 165 degrees, 177 degrees, or 185 degrees.

[0129] like Figure 3 and Figure 4 As shown, when the first shell 302 and the second shell 303 are folded relative to each other to a closed state, the electronic device 100 is in a closed state, the first shell 302 and the second shell 303 can be closed to each other, and there is no large gap between the first shell 302 and the second shell 303. In this way, the appearance experience of the electronic device 100 is better, and the waterproof, dustproof and anti-foreign matter performance is better. The situation where the first shell 302 and the second shell 303 are closed includes the situation where the two are against each other, and may also include the situation where there is a small gap between the two. When there is a small gap between the first shell 302 and the second shell 303, some foreign matter outside the electronic device 100 will not enter between the first shell 302 and the second shell 303 through the gap.

[0130] The first shell 302 and the second shell 303 can also be relatively unfolded or folded to an intermediate state, so that the electronic device 100 is in an intermediate state. The intermediate state can be any state between the unfolded state and the closed state.

[0131] Please refer again Figure 5 The first housing 302 includes a first portion 3021, a second portion 3022, a third portion 3023, and a fourth portion 3024. The second portion 3022 is connected to the first portion 3021. The height of the first portion 3021 in the Z-axis direction is greater than the height of the second portion 3022 in the Z-axis direction. The first portion 3021 and the second portion 3022 form a roughly stepped shape in the Z-axis direction. Furthermore, one side of the third portion 3023 is connected to the first portion 3021, and one side is connected to the second portion 3022. The fourth portion 3024 is disposed opposite the third portion 3023. One side of the fourth portion 3024 is connected to the first portion 3021, and one side is connected to the second portion 3022. The first housing 302 is provided with a fixing groove 3025. The side surface of the first portion 3021, the surface of the second portion 3022, the side surface of the third portion 3023, and the side surface of the fourth portion 3024 form the fixing groove 3025. In this embodiment, the configuration of the second housing 303 may refer to the configuration of the first housing 302. The details will not be repeated here.

[0132] Please refer again Figure 1 、 Figure 2 and Figure 4 The flexible screen 2 includes a first non-bending portion 21, a bending portion 22, and a second non-bending portion 23. The bending portion 22 is connected between the first non-bending portion 21 and the second non-bending portion 23. Figure 1 and Figure 2The first non-bending portion 21, the bending portion 22, and the second non-bending portion 23 are schematically distinguished by dashed lines. The first non-bending portion 21 of the flexible screen 2 is fixedly connected to the first shell 302. The second non-bending portion 23 is fixedly connected to the second shell 303. During the relative expansion or folding of the first shell 302 and the second shell 303, the first shell 302 can drive the first non-bending portion 21 to move, and the second shell 303 can drive the second non-bending portion 23 to move. The first non-bending portion 21 and the second non-bending portion 23 can expand or fold relative to each other, and the bending portion 22 can deform.

[0133] It can be understood that since the first non-bending portion 21 is fixedly connected to the first shell 302 and the second non-bending portion 23 is fixedly connected to the second shell 303, when the first shell 302 and the second shell 303 are relatively unfolded or folded, the relative unfolding and folding movements between the first non-bending portion 21 and the second non-bending portion 23 can be accurately controlled, so that the folding process and movement form of the flexible screen 2 are controllable and the reliability is relatively high.

[0134] like Figure 1 and Figure 2 As shown, when the first housing 302 and the second housing 303 are relatively unfolded to a flat state (that is, the electronic device 100 is in the flat state), the first non-bending portion 21, the bending portion 22, and the second non-bending portion 23 of the flexible screen 2 can be 180 degrees. In other embodiments, the first non-bending portion 21, the bending portion 22, and the second non-bending portion 23 can also have a slight deviation from 180 degrees, such as 165 degrees, 177 degrees, or 185 degrees.

[0135] like Figure 3 and Figure 4 As shown, when the first housing 302 and the second housing 303 are in a closed state (i.e., the electronic device is in a closed state), the first non-bending portion 21 and the second non-bending portion 23 are approximately parallel and close to each other, and the bending portion 22 is bent. At this time, the shape of the flexible screen 2 is roughly "teardrop". In addition, the flexible screen 2 is located between the first housing 302 and the second housing 303.

[0136] See also Figure 6 , Figure 6 yes Figure 5 A partially exploded schematic diagram of a folding mechanism 301 is shown. The folding mechanism 301 includes a main shaft 31, a first fixing bracket 32, a second fixing bracket 33, a first connecting arm 34, a second connecting arm 35, a damping member 36, a first subassembly 37, a second subassembly 38, a first swing arm 41, a second swing arm 42, a first support plate 43, and a second support plate 44. For example, the main shaft 31 extends in the Y-axis direction.

[0137] The first fixing bracket 32, the second fixing bracket 33, the first connecting arm 34, the second connecting arm 35, the damping member 36, the first subassembly 37, the second subassembly 38, the first swing arm 43, and the second swing arm 44 can collectively form a first connecting assembly. For example, the first connecting assembly can serve as the bottom connecting assembly of the folding mechanism 301. The folding mechanism 301 can also include a second connecting assembly. The second connecting assembly can serve as the top connecting assembly of the folding mechanism 301. Both the first connecting assembly and the second connecting assembly are connected to the main shaft 31, the first support plate 43, and the second support plate 44.

[0138] For example, the second connecting component and the first connecting component can have the same or similar structure, a symmetrical or partially symmetrical structure, or a different structure. In some embodiments, the second connecting component and the first connecting component have symmetrical structures. The basic design of the component structure of the second connecting component, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the components can all refer to the relevant solutions of the first connecting component. At the same time, the second connecting component and the first connecting component can have slight differences in the detailed structure or position arrangement of the components.

[0139] For example, the second connecting assembly may include a first fixing bracket 32b, a second fixing bracket 33b, a first connecting arm 34b, a second connecting arm 35b, a damping member 36b, a first subassembly 37b, a second subassembly 38b, a first swing arm 41b, and a second swing arm 42b. The structures of the components of the second connecting assembly and the connections between the components and the main shaft 31, the first support plate 43, and the second support plate 44 may refer to the description of the first connecting assembly. This embodiment of the present application will not be further described.

[0140] Please refer again Figure 6 The folding mechanism 301 may further include a third fixing frame 45, a fourth fixing frame 46, a third swing arm 47, a fourth swing arm 48, and an auxiliary damping member 49. The third fixing frame 45, the fourth fixing frame 46, the third swing arm 47, the fourth swing arm 48, and the auxiliary damping member 49 may collectively form a third connecting assembly. The third connecting assembly may serve as the central connecting assembly of the folding mechanism 301. In this case, the third connecting assembly is located between the first connecting assembly and the second connecting assembly. Both the third connecting assembly and the second connecting assembly are connected to the main shaft 31, the first support plate 43, and the second support plate 44. The details will be described in detail below in conjunction with the relevant drawings and will not be repeated here.

[0141] It should be understood that the first fixing bracket 32 ​​of the first connecting assembly, the first fixing bracket 32b of the second connecting assembly, and the third fixing bracket 45 of the third connecting assembly can be independent structural members or multiple parts of an integrated structural member. The second fixing bracket 33 of the first connecting assembly, the second fixing bracket 33b of the second connecting assembly, and the fourth fixing bracket 46 of the third connecting assembly can be independent structural members or multiple parts of an integrated structural member.

[0142] See also Figure 7 , Figure 7 yes Figure 6 The main shaft 31 is a partially exploded schematic diagram of an embodiment of the main shaft 31. The main shaft 31 includes a base 311, a first housing 312, a second housing 313, a third housing 314 and a main housing 315.

[0143] See also Figure 8 , and combined with Figure 7 As shown, Figure 8 yes Figure 7 The base 311 is shown as a schematic diagram of the structure at another angle. The base 311 can be a one-piece structural member, or it can be formed into an one-piece structure by assembly. The base 311 includes a first end 311a, a middle part 311b and a second end 311c connected in sequence. It should be noted that in order to clearly and conveniently describe the specific structure of the base 311, Figure 7 and Figure 8 Dashed lines schematically distinguish the first end portion 311a, the middle portion 311b, and the second end portion 311c. These dashed lines do not define the positional relationship or structural connection between the first end portion 311a, the middle portion 311b, and the second end portion 311c. The first end portion 311a, the middle portion 311b, and the second end portion 311c may be different regions of the same base 311 structure, or they may be three separate, discrete structures.

[0144] For example, the first end 311a of the base 311 and the second end 311c of the base 311 can have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In some embodiments, the first end 311a of the base 311 and the second end 311c of the base 311 have symmetrical structures. This simplifies the overall structure of the base 311 and reduces manufacturing costs. Furthermore, it helps improve the symmetry of the base 311.

[0145] Please refer again Figure 7 , multiple groove structures and protrusion structures are formed on one side of the base 311. These structures form multiple mating surfaces on the base 311. Please refer to Figure 8 The surface on the other side of the base 311 can be a plane, that is, the base 311 has a first supporting surface 304 .

[0146] See also Figure 9 and Figure 10a , Figure 9 yes Figure 7 FIG. 3 is a schematic structural diagram of the first end portion 311 a of the base 311 . Figure 10a yes Figure 9 The first end portion 311a is shown as a schematic structural diagram from another angle. The first end portion 311a of the base 311 is provided with a plurality of first limiting grooves 3111, a plurality of second limiting grooves 3112, a plurality of first avoidance spaces 3113, a plurality of second avoidance spaces 3114, a first rotation axis groove 3116, a second rotation axis groove 3117, a third rotation axis groove 3118, and a fourth rotation axis groove 3119.

[0147] A plurality of first limiting grooves 3111 are located on one side of the base 311. The plurality of first limiting grooves 3111 are spaced apart and arranged relative to each other along the length direction (i.e., the Y-axis direction) of the main shaft 311. For example, there are seven first limiting grooves 3111. The shapes and sizes of the seven first limiting grooves 3111 can be flexibly configured.

[0148] Multiple first escape spaces 3113 are also located on one side of the base 311. These first escape spaces 3113 are spaced apart along the length of the main shaft 311. Each first escape space 3113 is located between and communicates with two first limiting grooves 3111. By way of example, there are four first escape spaces 3113. The shapes and sizes of the four first escape spaces 3113 can also be flexibly configured.

[0149] A plurality of second limiting grooves 3112 are located on the other side of the base 311. The plurality of second limiting grooves 3112 are spaced apart along the Y-axis and are arranged relative to each other. For example, there are seven second limiting grooves 3112. The shapes and sizes of the seven second limiting grooves 3112 can also be flexibly set.

[0150] Multiple second escape spaces 3114 are also located on the other side of the base 311. These second escape spaces 3114 are spaced apart along the Y-axis. Each second escape space 3114 is located between and communicates with two second limiting grooves 3112. By way of example, there are four second escape spaces 3114. The shapes and sizes of the four second escape spaces 3114 can also be flexibly configured.

[0151] The first rotation axis slot 3116 is disposed opposite to the second rotation axis slot 3117. The third rotation axis slot 3118 is disposed opposite to the fourth rotation axis slot 3119. The third rotation axis slot 3118 is disposed adjacent to the first rotation axis slot 3116. The second rotation axis slot 3117 is disposed adjacent to the fourth rotation axis slot 3119.

[0152] See also Figure 9 、 Figure 10a 、 Figure 10b and Figure 10c , Figure 10b yes Figure 10a The enlarged schematic diagram of the first end portion 311a at position M1 is shown. Figure 10c yes Figure 9 An enlarged schematic diagram of the first end portion 311a shown at M2. The base 311 also includes a first wall 310a, a second wall 310b, a third wall 310c and a fourth wall 310d. The first wall 310a is connected to the groove wall of the first rotating shaft groove 3116, that is, the first wall 310a is provided with the first rotating shaft groove 3116. The second wall 310b is connected to the groove wall of the second rotating shaft groove 3117, that is, the second wall 310b is provided with the second rotating shaft groove 3117. The third wall 310c is connected to the groove wall of the third rotating shaft groove 3118 and is connected to the first wall 310a, that is, the third wall 310c is provided with the third rotating shaft groove 3118. The fourth wall 310d is connected to the groove wall of the fourth rotating shaft groove 3119 and is connected to the second wall 310b, that is, the fourth wall 310d is provided with the fourth rotating shaft groove 3119. It should be noted that, Figure 10b The first wall surface 310 a and the third wall surface 310 c are schematically distinguished by dotted lines. Figure 10c The second wall surface 310 b and the fourth wall surface 310 d are schematically distinguished by dotted lines.

[0153] See also Figure 10d , Figure 10d yes Figure 6 FIG3 is a partial structural diagram of the spindle 31. The first housing 312 is fixedly connected to the first end 311a of the base 311. For example, the first housing 312 is fixedly connected to the first end 311a of the base 311 by inserting a fastener (a screw, pin, or screw) through the first housing 312 and the first end 311a of the base 311. In other embodiments, the first housing 312 and the first end 311a of the base 311 can also be fixedly connected to each other by bonding, welding, or other methods.

[0154] It should be understood that the first housing 312 may also be provided with a groove and a bump structure. When the first housing 312 is fixed to the first end 311a of the base 311, the groove and the bump structure of the first housing 312 can cooperate with the bump and groove structure of the base 311 to be used for mating connection with the first connecting assembly.

[0155] In this embodiment, the connection relationship between the second housing 313 and the second end portion 311c of the base 311, and the connection relationship between the third housing 314 and the middle portion 311b of the base 311, can be similar to the connection relationship between the first housing 312 and the first end portion 311a of the base 311. It should be understood that the second end portion 311c of the base 311 and the second housing 313 are used to mate with the second connecting assembly. The middle portion 311b of the base 311 and the third housing 314 are used to mate with the third connecting assembly.

[0156] For example, the second housing 313 and the first housing 312 may have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In some embodiments, the second housing 313 and the first housing 312 may have symmetrical structures. This simplifies the overall structure of the main shaft 31 and reduces manufacturing costs. Furthermore, it helps improve the symmetry of the main shaft 31.

[0157] Please refer again Figure 6 , and combined with Figure 7 As shown, the main housing 315 is fixedly connected to the base 311 and covers the first housing 312, the second housing 313, and the third housing 314. In this case, the first housing 312, the second housing 313, and the third housing 314 are located between the base 311 and the main housing 315. This improves the overall strength of the main shaft 31. For example, the main housing 315 can be fixedly connected to the base 311 by snapping.

[0158] Combine Figure 2 As shown, when the electronic device 100 is in a flattened state, the main shaft 31 is located between the first shell 302 and the second shell 303. The base 311 of the main shaft 31 faces the flexible screen 2, and the first supporting surface 304 of the base 311 can be used to support the bent portion 22 of the flexible screen 2.

[0159] Combine Figure 4 As shown, when the electronic device 100 is in the closed state, the main shaft 31 is connected to the first shell 302 and the second shell 303. The main housing 315 is located on the side of the base 311 away from the bent portion 22 of the flexible screen 2. A portion of the main housing 315 is exposed outside the electronic device 100. By way of example, by providing a smooth outer surface with minimal roughness, the external consistency of the electronic device 100 is improved, thereby enhancing the user experience of the electronic device 100.

[0160] See also Figure 11 and Figure 12 , Figure 11 yes Figure 6 The schematic structural diagram of the first fixing frame 32 and the second fixing frame 33 is shown. Figure 12 yes Figure 11The first fixing frame 32 and the second fixing frame 33 are shown in a schematic diagram from another angle. The first fixing frame 32 includes a top surface 321, a bottom surface 322, a first side surface 323, a second side surface 324, and a third side surface 325. The top surface 321 and the bottom surface 322 are disposed opposite each other. The first side surface 323 and the second side surface 324 are disposed opposite each other. The first side surface 323 and the second side surface 324 are connected between the top surface 321 and the bottom surface 322. The third side surface 325 is connected between the top surface 321 and the bottom surface 322, and between the first side surface 323 and the second side surface 324.

[0161] The first fixing frame 32 may also be provided with a first slide groove 3261 and a second slide groove 3262 disposed opposite each other. The first slide groove 3261 and the second slide groove 3262 both form openings on the first side surface 323. The first fixing frame 32 also has a first movable notch 3263. The first movable notch 3263 forms openings on the top surface 321, the bottom surface 322, and the first side surface 323. The first movable notch 3263 connects the first slide groove 3261 and the second slide groove 3262.

[0162] The first fixing frame 32 is further provided with an arcuate slot 327. The arcuate slot 327 forms an opening on the bottom surface 322, and forms openings on the second side surface 324 and the third side surface 325. The number of the arcuate slot 327 can be one or more.

[0163] In this embodiment, the second fixing frame 33 and the first fixing frame 32 can have the same structure, a symmetrical structure, a partially symmetrical structure, or different structures, and this application does not impose strict restrictions on this. In this embodiment, the second fixing frame 33 and the first fixing frame 32 have a partially symmetrical structure. The basic design of the component structure of the second fixing frame 33, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the assembly can all refer to the relevant solutions of the first fixing frame 32. At the same time, it is allowed that the second fixing frame 33 and the first fixing frame 32 have some differences in the detailed structure or position arrangement of the components.

[0164] See also Figure 13 , Figure 13 yes Figure 2 The diagram shows a partial structure of the folding device 3. The first fixing bracket 32 ​​is fixedly connected to the fixing slot 3025 of the first housing 302. For example, by providing fastening holes in the first fixing bracket 32 ​​and fastening holes in the first housing 302, and by using fasteners (screws, pins, or screws) to pass through the fastening holes of the first fixing bracket 32 ​​and the fastening holes of the first housing 302, the first fixing bracket 32 ​​is fixedly connected to the first housing 302. The bottom surface 322 of the first fixing bracket 32 ​​faces away from the second portion 3022 of the first housing 302.

[0165] In other embodiments, the first fixing frame 32 may also be installed in the fixing groove 3025 by welding, bonding, snap-fit ​​connection, etc.

[0166] In other embodiments, a matching structure of a positioning post and a positioning hole may be further provided between the first fixing frame 32 and the first housing 302 to improve the stability of the connection therebetween.

[0167] In this embodiment, the connection relationship between the second fixing frame 33 and the second housing 303 can refer to the connection relationship between the first fixing frame 32 and the first housing 302. The details are not repeated here.

[0168] See also Figure 14 , Figure 14 yes Figure 6 The diagram shows the structure of the first connecting arm 34 and the second connecting arm 35. The first connecting arm 34 includes a sliding end 34a, a rotating end 34b, and a connecting section 34c connecting the sliding end 34a and the rotating end 34b. The connecting section 34c can be bent relative to the sliding end 34a to provide more diverse shapes for the first connecting arm 34. The first connecting arm 34 can be an integrally formed structural component to provide higher structural strength.

[0169] In this embodiment, the sliding end 34a of the first connecting arm 34 includes a first sliding body 341, a first strip-shaped protrusion 342, and a second strip-shaped protrusion 343. The first sliding body 341 can be substantially flat. The first strip-shaped protrusion 342 and the second strip-shaped protrusion 343 are respectively located on either side of the first sliding body 341.

[0170] In addition, the rotating end 34b of the first connecting arm 34 includes a first gear portion 344 and a first reinforcement portion 345. It should be understood that the first gear portion 344 has a tooth-like structure. The first reinforcement portion 345 does not have a tooth-like structure, and the surface flatness of the first reinforcement portion 345 is higher than the surface flatness of the first gear portion 344. The first reinforcement portion 345 can improve the overall strength of the first connecting arm 34. In this embodiment, the number of the first reinforcement portion 345 is one. The first reinforcement portion 345 is connected to one side of the first gear portion 344. In other embodiments, the number of the first reinforcement portion 345 is two. The two first reinforcement portions 345 are respectively connected to the two sides of the first gear portion 344.

[0171] In other embodiments, the rotating end 34 b of the first connecting arm 34 may not include the first reinforcing portion 345 .

[0172] Please refer again Figure 14The second connecting arm 35 includes a sliding end 35a, a rotating end 35b, and a connecting section 35c connecting the sliding end 35a and the rotating end 35b. The connecting section 35c can be bent relative to the sliding end 35a to provide a more diverse shape for the second connecting arm 35. The second connecting arm 35 can be an integrally formed structural member to provide greater structural strength.

[0173] In this embodiment, the sliding end 35a of the second connecting arm 35 includes a second sliding body 351, a third strip-shaped protrusion 352, and a fourth strip-shaped protrusion 353. The second sliding body 351 can be substantially flat. The third strip-shaped protrusion 352 and the fourth strip-shaped protrusion 353 are located on either side of the second sliding body 351.

[0174] In addition, the rotating end 35b of the second connecting arm 35 includes a second gear portion 354 and a second reinforcement portion 355. It should be understood that the second gear portion 354 has a tooth-like structure. The second reinforcement portion 355 does not have a tooth-like structure. The surface flatness of the second reinforcement portion 355 is higher than the surface flatness of the second gear portion 354. The second reinforcement portion 355 can improve the overall strength of the second connecting arm 35. In this embodiment, the number of the second reinforcement portion 355 is one. The second reinforcement portion 355 is connected to one side of the second gear portion 354. In other embodiments, the number of the second reinforcement portion 355 is two. The two second reinforcement portions 355 are respectively connected to the two sides of the second gear portion 354.

[0175] In other embodiments, the rotating end 35 b of the second connecting arm 35 may not include the second reinforcing portion 355 .

[0176] See also Figure 15 , and combined with Figure 14 and Figure 9 As shown, Figure 15 yes Figure 5 A partial structural diagram of the folding mechanism 301 is shown. The sliding end 34a of the first connecting arm 34 is slidably connected to the first fixed frame 32. The rotating end 34b of the first connecting arm 34 is rotatably connected to the main shaft 31. In other embodiments, the sliding end 34a of the first connecting arm 34 can also be fixedly connected to the first fixed frame 32.

[0177] For example, the rotating end 34b of the first connecting arm 34 is located in the first avoidance space 3113 of the base 311. The rotating end 34b of the first connecting arm 34 can rotate relative to the base 311 in the first avoidance space 3113. The rotation axis of the rotating end 34b of the first connecting arm 34 can be parallel to the extension direction of the Y axis. Figure 15Only the positional relationship between the rotating end 34 b of the first connecting arm 34 and the base 311 is illustrated. The connection relationship between the rotating end 34 b of the first connecting arm 34 and the base 311 will be described in detail below with reference to the relevant drawings.

[0178] See also Figure 16 , and combined with Figure 14 and Figure 9 As shown, Figure 16 yes Figure 15 The schematic cross-sectional view of the partially folding mechanism 301 along line A2-A2 is shown. The first sliding body 341 of the sliding end 34a of the first connecting arm 34 is disposed within the first movable notch 3263. The first bar-shaped protrusion 342 of the first connecting arm 34 is disposed within the first slide groove 3261 of the first fixing frame 32, and the first bar-shaped protrusion 342 is slidably connected to the first slide groove 3261. The second bar-shaped protrusion 343 of the first connecting arm 34 is disposed within the second slide groove 3262 of the first fixing frame 32. The second bar-shaped protrusion 343 of the first connecting arm 34 can be slidably connected to the second slide groove 3262 of the first fixing frame 32.

[0179] Please refer again Figure 15 and Figure 16 , and again combine Figure 14 and Figure 9 As shown, the sliding end 35a of the second connecting arm 35 is slidably connected to the second fixing frame 33. The rotating end 35b of the second connecting arm 35 is rotationally connected to the main shaft 31. Based on the same or similar inventive concepts, the connection relationship between the sliding end 35a of the second connecting arm 35 and the second fixing frame 33 can be referred to as the connection relationship between the sliding end 34a of the first connecting arm 34 and the first fixing frame 32. The connection relationship between the rotating end 35b of the second connecting arm 35 and the main shaft 31 can be referred to as the connection relationship between the rotating end 34b of the first connecting arm 34 and the main shaft 31. The details will not be repeated here.

[0180] See also Figure 17 , Figure 17 yes Figure 6 The damping member 36 is shown as an exploded view. The damping member 36 includes a first pin 361, a second pin 362, a first gear 363, a second gear 364, a first matching member 365, a second matching member 366, a third matching member 367, a fourth matching member 368, a first elastic member 369a, and a second elastic member 369b.

[0181] See also Figure 18 , and combined with Figure 17 As shown, Figure 18 yes Figure 17The diagram shows the structure of the first pin 361 and the second pin 362 from another angle. The first pin 361 includes a first shaft portion 3611 and a first position-limiting flange 3612. The first shaft portion 3611 can be rod-shaped. The first position-limiting flange 3612 can be ring-shaped. Furthermore, the first shaft portion 3611 includes a first section 3613 and a second section 3614 connecting the first section 3613. The first position-limiting flange 3612 is connected to the peripheral side of the first section 3613.

[0182] The first section 3613 may be at least partially cylindrical. The cross-section of the second section 3614 is not a standard circle. The second section 3614 includes a first surface 3615 and a second surface 3616 disposed in opposite directions (see FIG. Figure 17 ), and the third surface 3617 and the fourth surface 3618 disposed in the opposite direction (see Figure 17 ). Third surface 3617 and fourth surface 3618 are connected between first surface 3615 and second surface 3616. First surface 3615 can be a concave arc surface. Second surface 3616 can be a concave arc surface. Third surface 3617 can be a convex arc surface. Fourth surface 3618 can be a convex arc surface.

[0183] In other embodiments, the first surface 3615 may also be a plane. The second surface 3616 may also be a plane.

[0184] In other embodiments, the first surface 3615 may also be a convex curved surface, but the curvature of the first surface 3615 is smaller than the curvatures of the third surface 3617 and the fourth surface 3618. The second surface 3616 may also be a convex curved surface, but the curvature of the second surface 3616 is also smaller than the curvatures of the third surface 3617 and the fourth surface 3618.

[0185] In other embodiments, the surface shapes of the first surface 3615 , the second surface 3616 , the third surface 3617 , and the fourth surface 3618 are not specifically limited.

[0186] In other embodiments, the first pin shaft 361 may also adopt other structures.

[0187] Please refer again Figure 17 The second pin 362 includes a second shaft portion 3621 and a second position-limiting flange 3622. The second shaft portion 3621 can be rod-shaped. The second position-limiting flange 3622 can be ring-shaped. Furthermore, the second shaft portion 3621 includes a third section 3623 and a fourth section 3624 connecting the third section 3623. The second position-limiting flange 3622 is connected to the peripheral side surface of the third section 3623.

[0188] For example, third section 3623 can be cylindrical. The cross-section of fourth section 3624 is not a perfect circle. Fourth section 3624 includes a first surface 3625 and a second surface 3626 disposed in opposite directions, as well as a third surface 3627 and a fourth surface 3628 disposed in opposite directions. Third surface 3627 and fourth surface 3628 are connected between first surface 3625 and second surface 3626. First surface 3625 can be a concave arc surface. Second surface 3626 can be a concave arc surface. Third surface 3627 can be a convex arc surface. Fourth surface 3628 can be a convex arc surface.

[0189] In other embodiments, the first surface 3625 may also be a plane, and the second surface 3626 may also be a plane.

[0190] In other embodiments, the first surface 3625 may also be a convex curved surface, but the curvature of the first surface 3625 is smaller than the curvatures of the third surface 3627 and the fourth surface 3628. The second surface 3626 may also be a convex curved surface, but the curvature of the second surface 3626 is also smaller than the curvatures of the third surface 3627 and the fourth surface 3628.

[0191] In other embodiments, the surface shapes of the first surface 3625 , the second surface 3626 , the third surface 3627 and the fourth surface 3628 are not specifically limited.

[0192] In other embodiments, the second pin shaft 362 may also adopt other structures.

[0193] See also Figure 19 , Figure 19 yes Figure 17 Schematic diagrams of the structure of the first gear 363 and the second gear 364 at different angles are shown. The first gear 363 includes a first gear portion 3631 and multiple first protrusions 3632. The first gear portion 3631 may be provided with a first pin hole 3633. The multiple first protrusions 3632 are located at one end of the first gear portion 3631. The multiple first protrusions 3632 are arranged in a ring shape and spaced apart from each other, surrounding the first pin hole 3633 of the first gear portion 3631. The end surface of the first gear 363 away from the first protrusions 3632 may be flat. The first gear 363 may be an integrally molded component to provide greater structural strength. It is understood that having multiple first protrusions 3632 improves the structural symmetry of the first gear 363, thereby improving the overall stability of the folding mechanism 301 when the first gear 363 is used. In other embodiments, the number of first protrusions 3632 may also be one.

[0194] The first pin hole 3633 includes a first wall 3633a and a second wall 3633b, which are arranged opposite each other, as well as a third wall 3633c and a fourth wall 3633d, which are arranged opposite each other. The third wall 3633c and the fourth wall 3633d are connected between the first wall 3633a and the second wall 3633b. In this embodiment, the first wall 3633a and the second wall 3633b are both flat. The third wall 3633c and the fourth wall 3633d are both convex curved surfaces. In other embodiments, the shapes of the various walls of the first pin hole 3633 are not specifically limited.

[0195] Please refer again Figure 19 , and combined with Figure 17 As shown, the second gear 364 includes a second gear portion 3641 and a plurality of second protrusions 3642. The second gear portion 3641 may be provided with a second pin hole 3643. The plurality of second protrusions 3642 are located at one end of the second gear portion 3641. The plurality of second protrusions 3642 are arranged in a ring shape and spaced apart from each other, surrounding the second pin hole 3643 of the second gear portion 3641. The end surface of the second gear 364 facing away from the second protrusions 3642 may be flat. The second gear 364 may be an integrally molded component to provide greater structural strength. It will be appreciated that having multiple second protrusions 3642 improves the structural symmetry of the second gear 364, thereby improving the overall stability of the folding mechanism 301 when the second gear 364 is used. In other embodiments, the number of second protrusions 3642 may also be one.

[0196] The second pin hole 3643 includes a first wall 3643a and a second wall 3643b, which are arranged opposite to each other, and a third wall 3643c and a fourth wall 3643d, which are arranged opposite to each other. The third wall 3643c and the fourth wall 3643d are connected between the first wall 3643a and the second wall 3643b. In this embodiment, the first wall 3643a and the second wall 3643b can both be flat. The third wall 3643c and the fourth wall 3643d can both be convex curved surfaces. In other embodiments, the shape of the wall surface of the second pin hole 3643 is not specifically limited.

[0197] See also Figure 20 , and combined with Figure 18 and Figure 19 As shown, Figure 20 yes Figure 6A partial structural diagram of the damping member 36 is shown. The second section 3614 of the first shaft portion 3611 of the first pin 361 is inserted into the first gear 363. The second section 3614 of the first shaft portion 3611 of the first pin 361 passes through the first pin hole 3633 of the first gear 363. The first gear 363 abuts against the first limiting flange 3612 of the first pin 361. This prevents the first gear 363 from sliding off the first pin 361 in the negative direction of the Y-axis. Furthermore, when the first pin 361 is inserted into the first gear 363, the multiple first protrusions 3632 of the first gear 363 face away from the first limiting flange 3612.

[0198] It can be understood that when the second section 3614 of the first shaft portion 3611 of the first pin shaft 361 is inserted into the first gear 363, through the mutual cooperation of the first wall 3633a, the second wall 3633b, the third wall 3633c and the fourth wall 3633d of the first pin shaft hole 3633 and the first surface 3615, the second surface 3616, the third surface 3617 and the fourth surface 3618 of the second section 3614 of the first pin shaft 361, when the first pin shaft 361 rotates, the first gear 363 can also rotate with the first pin shaft 361.

[0199] In other embodiments, the first gear 363 may be fixed to the first pin 361 by welding or bonding. In this case, when the first pin 361 rotates, the first gear 363 may also rotate relatively with the first pin 361 .

[0200] Please refer again Figure 20 , and combined with Figure 18 and Figure 19 As shown, the fourth section 3624 of the second shaft portion 3621 of the second pin 362 is inserted into the second gear 364. Specifically, the fourth section 3624 of the second shaft portion 3621 of the second pin 362 passes through the second pin hole 3643 of the second gear 364. The second gear 364 abuts against the second retaining flange 3622 of the second pin 362. This prevents the second gear 364 from sliding off the second pin 362 in the negative direction of the Y-axis. Furthermore, when the second pin 362 is inserted into the second gear 364, the plurality of second protrusions 3642 of the second gear 364 face away from the second retaining flange 3622.

[0201] In this embodiment, when the fourth section 3624 of the second shaft portion 3621 of the second pin shaft 362 is inserted into the second gear 364, through the mutual cooperation of the first wall 3643a, the second wall 3643b, the third wall 3643c and the fourth wall 3643d of the second pin shaft hole 3643 and the first surface 3625, the second surface 3626, the third surface 3627 and the fourth surface 3628 of the fourth section 3624 of the second pin shaft 362, when the second pin shaft 362 rotates, the second gear 364 can also rotate with the second pin shaft 362.

[0202] In other embodiments, the second gear 364 may be fixed to the second pin 362 by welding or bonding. In this case, when the second pin 362 rotates, the second gear 364 may also rotate relatively with the second pin 362 .

[0203] Exemplarily, the second gear 364 is meshed with the first gear 363. In this way, the movements of the second gear 364 and the first gear 363 can be kept synchronized.

[0204] See also Figure 21 , Figure 21 yes Figure 17 The diagram shows the structure of the first mating part 365 at different angles. The first mating part 365 includes a first limiting plate 3651 and a plurality of first protrusion groups 3652. The plurality of first protrusion groups 3652 are fixed at intervals on the same side surface of the first limiting plate 3651. The first mating part 365 can be an integrally formed structural part to have a higher structural strength. Exemplarily, the number of first protrusion groups 3652 is two. It is understandable that the first mating part 365 can also be composed of two separate sub-mating parts. One of the sub-mating parts includes a portion of the first limiting plate 3651 and a first protrusion group 3652. The other sub-mating part includes another portion of the first limiting plate 3651 and another first protrusion group 3652.

[0205] The first limiting plate 3651 is provided with a plurality of first through holes 3653. The plurality of first through holes 3653 are spaced apart from each other. The plurality of first protrusion groups 3652 are arranged in a one-to-one correspondence with the plurality of first through holes 3653. Each first protrusion group 3652 may include a plurality of first protrusions 3654, the plurality of first protrusions 3654 being arranged in a ring shape and spaced apart from each other, the plurality of first protrusions 3654 being arranged around the first through holes 3653, and a groove being formed between two adjacent first protrusions 3654. It is understood that when there are a plurality of first protrusions 3654, the structural symmetry of the first mating member 365 can be improved, so that when the first mating member 365 is applied to the folding mechanism 301, the overall stability of the folding mechanism 301 is better. In other embodiments, the number of first protrusions 3654 may also be one.

[0206] For example, there are two first through holes 3653. The first through holes 3653 may be circular holes.

[0207] See also Figure 22a and Figure 22b , Figure 22a yes Figure 6 FIG. 1 is a partial structural diagram of the damping member 36 shown. Figure 22b yes Figure 22a The schematic cross-sectional view of a portion of the damping member 36 at line C1-C1 is shown. The second section 3614 of the first shaft portion 3611 of the first pin 361 is inserted into the first mating member 365. The second section 3614 of the first shaft portion 3611 of the first pin 361 passes through a first through-hole 3653 of the first mating member 365. The fourth section 3624 of the second shaft portion 3621 of the second pin 362 is also inserted into the first mating member 365. The fourth section 3624 of the second shaft portion 3621 of the second pin 362 passes through another first through-hole 3653 of the first mating member 365. Thus, when the first pin 361 rotates about its own axis, the first mating member 365 does not rotate with it. When the second pin 362 rotates about its own axis, the first mating member 365 does not rotate with it.

[0208] Furthermore, the first first lug group 3652 of the first mating member 365 is positioned opposite the first protrusion 3632 of the first gear 363, forming a cam structure. The second first lug group 3652 of the first mating member 365 is positioned opposite the second protrusion 3642 of the second gear 364, forming a cam structure. At this point, as the first gear 363 rotates along the first pin 361 and the second gear 364 rotates along the second pin 362, the first mating member 365 can move closer to or further from the first gear 363 and the second gear 364 (i.e., the first mating member 365 is slidably connected to the first pin 361 and the second pin 362, sliding in the Y-axis direction).

[0209] Furthermore, when the second section 3614 of the first shaft portion 3611 of the first pin 361 passes through a first through-hole 3653 of the first mating member 365, a portion of the surface of the second section 3614 abuts against a portion of the surface of the first through-hole 3653, while a portion of the surface of the second section 3614 separates from a portion of the surface of the first through-hole 3653. Thus, the shape of the first through-hole 3653 of the first mating member 365 and the surfaces of the second section 3614 of the first pin 361 cooperate to ensure that the first pin 361 does not interfere with the sliding movement of the first mating member 365 along the Y-axis. Similarly, the shape of the first through-hole 3653 of the first mating member 365 and the surfaces of the fourth section 3624 of the second pin 362 cooperate to ensure that the first and second pins 361, 362 do not interfere with the sliding movement of the first mating member 365 along the Y-axis.

[0210] See also Figure 23 , Figure 23 yes Figure 17 The diagram shows the structure of the second mating component 366 at different angles. The second mating component 366 includes a second limiting plate 3661 and a plurality of second protrusion groups 3662. The plurality of second protrusion groups 3662 are arranged at intervals on the same side surface of the second limiting plate 3661. The surface of the second limiting plate 3661 away from the second protrusion groups 3662 can be a plane. The second mating component 366 can be an integrally molded structural component to have a higher structural strength. Exemplarily, the number of second protrusion groups 3662 is two. It is understandable that the second mating component 366 can also be composed of two separate sub-mating components. One of the sub-mating components includes a portion of the second limiting plate 3661 and a second protrusion group 3662. The other sub-mating component includes another portion of the second limiting plate 3661 and another second protrusion group 3662.

[0211] The second limiting plate 3661 is provided with a plurality of second through holes 3663, which are spaced apart from each other. The plurality of second protrusion groups 3662 are arranged in a one-to-one correspondence with the plurality of second through holes 3663. Each second protrusion group 3662 may include a plurality of second protrusions 3664, which are arranged in a ring shape and spaced apart from each other. The plurality of second protrusions 3664 are arranged around the second through holes 3663, with grooves formed between adjacent second protrusions 3664. In other embodiments, the number of second protrusions 3664 may also be one.

[0212] For example, there are two second through holes 3663. The second through holes 3663 may be circular holes.

[0213] See also Figure 24a and Figure 24b , and combined with Figure 23 As shown, Figure 24a yes Figure 6 FIG. 1 is a partial structural diagram of the damping member 36 shown. Figure 24b yes Figure 24a The schematic cross-sectional view of a portion of the damping member 36 at line C2-C2 is shown. The second section 3614 of the first shaft portion 3611 of the first pin 361 is inserted into the second mating member 366. The second section 3614 of the first shaft portion 3611 of the first pin 361 passes through a second through-hole 3663 of the second mating member 366. The fourth section 3624 of the second shaft portion 3621 of the second pin 362 is also inserted into the second mating member 366. The fourth section 3624 of the second shaft portion 3621 of the second pin 362 passes through another second through-hole 3663 of the second mating member 366. Thus, when the first pin 361 rotates about its own axis, the second mating member 366 does not rotate with it. When the second pin 362 rotates about its own axis, the second mating member 366 does not rotate with it.

[0214] Exemplarily, the second mating member 366 is located on a side of the first mating member 365 that is away from the first gear 363 and the second gear 364. In this case, the first gear 363 is located on a side of the first mating member 365 that is away from the second mating member 366. The second gear 364 is located on a side of the first mating member 365 that is away from the second mating member 366. The first mating member 365 and the second mating member 366 are disposed opposite each other. Furthermore, the second protrusion group 3662 of the second mating member 366 faces away from the first mating member 365.

[0215] See also Figure 25 , Figure 25 yes Figure 17 Schematic diagrams of the structures of the third mating member 367 and the fourth mating member 368 at different angles are shown. The third mating member 367 includes a third limiting plate 3671 and a third bump group 3672. The third bump group 3672 is fixed to a side surface of the third limiting plate 3671. The surface of the third limiting plate 3671 facing away from the third bump group 3672 can be flat. The third mating member 367 can be an integrally formed structural member to provide greater structural strength. Exemplarily, there is one third bump group 3672.

[0216] The third limiting plate 3671 is provided with a third pin hole 3673. The third protrusion group 3672 may include a plurality of third protrusions 3674. The plurality of third protrusions 3674 are arranged in a ring shape and spaced apart from each other. The plurality of third protrusions 3674 are arranged around the third pin hole 3673, with a groove formed between adjacent third protrusions 3674. In other embodiments, the number of third protrusions 3674 may be one.

[0217] For example, there is one third pin hole 3673. The third pin hole 3673 includes a first wall 3673a and a second wall 3673b disposed opposite each other, and a third wall 3673c and a fourth wall 3673d disposed opposite each other. The third wall 3673c and the fourth wall 3673d are connected between the first wall 3673a and the second wall 3673b. The first wall 3673a may be flat. The second wall 3673b may be flat. The third wall 3673c may be curved. The fourth wall 3673d may be curved. In other embodiments, the shapes of the walls of the third pin hole 3673 are not specifically limited.

[0218] Please refer again Figure 25 The fourth mating component 368 includes a fourth limiting plate 3681 and a fourth protrusion group 3682. The fourth protrusion group 3682 is fixed to a side surface of the fourth limiting plate 3681. The surface of the fourth limiting plate 3681 away from the fourth protrusion group 3682 can be flat. The fourth mating component 368 can be an integrally molded structural component to provide greater structural strength. Exemplarily, there is one fourth protrusion group 3682.

[0219] The fourth limiting plate 3681 is provided with a fourth pin hole 3683. The fourth protrusion group 3682 may include a plurality of fourth protrusions 3684. The plurality of fourth protrusions 3684 are arranged in a ring shape and spaced apart from each other. The plurality of fourth protrusions 3684 are arranged around the fourth pin hole 3683, with a groove formed between adjacent fourth protrusions 3684. In other embodiments, the number of fourth protrusions 3684 may be one.

[0220] For example, there is one fourth pin hole 3683. The fourth pin hole 3683 includes a first wall 3683a and a second wall 3683b disposed opposite each other, and a third wall 3683c and a fourth wall 3683d disposed opposite each other. The third wall 3683c and the fourth wall 3683d are connected between the first wall 3683a and the second wall 3683b. The first wall 3683a may be flat. The second wall 3683b may be flat. The third wall 3683c may be an outwardly convex curved surface. The fourth wall 3683d may be an outwardly convex curved surface. In other embodiments, the shapes of the walls of the fourth pin hole 3683 are not specifically limited.

[0221] See also Figure 26 , and combined with Figure 25 As shown, Figure 26 yes Figure 6The figure shows an enlarged schematic diagram of the damping member 36. The second section 3614 of the first shaft portion 3611 of the first pin 361 is inserted into the third mating member 367. The second section 3614 of the first shaft portion 3611 of the first pin 361 passes through the third pin hole 3673 of the third mating member 367. At this point, the first mating member 365 and the second mating member 366 are located between the first gear 363 and the third mating member 367. The first gear 363 is spaced apart from the second mating member 366 and the third mating member 367.

[0222] It can be understood that through the mutual cooperation of the first wall 3673a, the second wall 3673b, the third wall 3673c and the fourth wall 3673d of the third pin shaft hole 3673 and the various surfaces of the second section 3614 of the first pin shaft 361, when the first pin shaft 361 rotates around itself as the rotation axis, the third matching piece 367 can also rotate with the first pin shaft 361.

[0223] In other embodiments, the third matching member 367 can be fixed to the first pin 361 by welding or bonding. In this case, when the first pin 361 rotates around itself as the rotation axis, the third matching member 367 can also rotate along with the first pin 361.

[0224] Please refer again Figure 26 , and combined with Figure 25 As shown, the fourth section 3624 of the second shaft portion 3621 of the second pin 362 is inserted into the fourth mating member 368. The fourth section 3624 of the second shaft portion 3621 of the second pin 362 passes through the fourth pin hole 3683 of the fourth mating member 368. The fourth mating member 368 is located on the side of the second mating member 366 away from the first mating member 365. The fourth mating member 368 is spaced apart from the second gear 364 and the first mating member 365.

[0225] It can be understood that through the mutual cooperation between the first wall 3683a, the second wall 3683b, the third wall 3683c and the fourth wall 3683d of the fourth pin shaft hole 3683 and the various surfaces of the fourth section 3624 of the second pin shaft 362, when the second pin shaft 362 rotates, the fourth matching piece 368 can also rotate with the second pin shaft 362.

[0226] In other embodiments, the fourth matching member 368 may be fixed to the second pin 362 by welding or bonding. In this case, when the second pin 362 rotates, the fourth matching member 368 may also rotate along with the second pin 362.

[0227] Please refer again Figure 26 , and combined with Figure 23 and Figure 25As shown, the third lug group 3672 of the third mating member 367 is positioned opposite the first lug group 3662 of the second mating member 366, forming a cam structure. The fourth lug group 3682 of the fourth mating member 368 is positioned opposite the second lug group 3662 of the second mating member 366, forming a cam structure. Thus, when the third mating member 367 rotates with the first pin 361 and the fourth mating member 368 rotates with the second pin 362, the second mating member 366 can move closer to or further from the third mating member 367 and the fourth mating member 368 (i.e., the second mating member 366 is slidably connected to the first pin 361 and the second pin 362, and the sliding direction is the Y-axis).

[0228] Please refer again Figure 26 The first elastic member 369a is an elastic structure that is easily deformed under the action of an external force. The first elastic member 369a can be a spring, a spring, or a flexible member with elastic force (such as an elastic rubber block). In this embodiment, the first elastic member 369a is described as a spring.

[0229] In addition, the second elastic member 369b is also an elastic structure and is easily deformed under the action of external force. The second elastic member 369b can be a spring, a spring, or a flexible member with elastic force (such as an elastic rubber block). In this embodiment, the second elastic member 369b is described as a spring.

[0230] The first elastic member 369a is sleeved around the second section 3614 of the first shaft portion 3611 of the first pin 361. The first elastic member 369a is positioned between the first mating member 365 and the second mating member 366. One end of the first elastic member 369a abuts against the first stop plate 3651 of the first mating member 365, while the other end abuts against the second stop plate 3661 of the second mating member 366. Furthermore, the second elastic member 369b is sleeved around the second pin 362. The second elastic member 369b is positioned between the first mating member 365 and the second mating member 366. One end of the second elastic member 369b abuts against the first stop plate 3651 of the first mating member 365, while the other end abuts against the second stop plate 3661 of the second mating member 366.

[0231] It is understood that when the first elastic member 369a and the second elastic member 369b are in a compressed state, the elastic force generated by the first elastic member 369a and the second elastic member 369b can press the first matching member 365 toward the first gear 363 and the second gear 364. In addition, the elastic force generated by the first elastic member 369a and the second elastic member 369b can also press the second matching member 366 toward the third matching member 367 and the fourth matching member 368.

[0232] See also Figure 27 , and combined with Figure 26 As shown, Figure 27 yes Figure 5 A partial structural diagram of the folding mechanism 301 is shown. A first pin 361 and a second pin 362 are rotatably connected to the base 311. The first gear 363 and the third mating member 367 on the first pin 361 are rotatably connected to the base 311 via the first pin 361. The second gear 364 and the fourth mating member 368 on the second pin 362 are rotatably connected to the base 311 via the second pin 362. The first mating member 365 and the second mating member 366 are slidably connected to the base 311 via the first pin 361 and the second pin 362.

[0233] For example, one end of the first shaft portion 3611 of the first pin shaft 361 is disposed in the first rotation shaft groove 3116 and can rotate relative to the first rotation shaft groove 3116. The other end of the first shaft portion 3611 of the first pin shaft 361 is disposed in the second rotation shaft groove 3117 and can rotate relative to the second rotation shaft groove 3117. It is understood that the first rotation shaft groove 3116 and the second rotation shaft groove 3117 can limit the movement of the first pin shaft 361 along the X-axis direction. In addition, the first limiting flange 3612 of the first pin shaft 361 abuts against the first wall surface 310a of the base 311 (see Figure 9 The third engaging member 367 abuts against the second wall surface 310b of the base 311 (see Figure 9 It will be appreciated that the first wall 310a and the second wall 310b can restrict the movement of the first pin 361 along the Y-axis. In other embodiments, one end of the first shaft portion 3611 of the first pin 361 can abut against the wall of the first rotation shaft groove 3116, and the other end of the first shaft portion 3611 of the first pin 361 can abut against the wall of the second rotation shaft groove 3117. In this way, the walls of the first rotation shaft groove 3116 and the walls of the second rotation shaft groove 3117 can be used to restrict the movement of the first pin 361 along the Y-axis.

[0234] Exemplarily, the second pin 362 is located between the first pin 361 and the rotating end 35b of the second connecting arm 35. One end of the second shaft portion 3621 of the second pin 362 is set in the third rotating shaft groove 3118 and can rotate relative to the third rotating shaft groove 3118. The other end of the second shaft portion 3621 of the second pin 362 is set in the fourth rotating shaft groove 3119 and can rotate relative to the fourth rotating shaft groove 3119. It can be understood that the third rotating shaft groove 3118 and the fourth rotating shaft groove 3119 can limit the movement of the second pin 362 along the X-axis direction. In addition, the second limiting flange 3622 of the second pin 362 is abutted against the third wall surface 310c of the base 311 (see Figure 9 The fourth fitting member 368 is held against the fourth wall surface 310d of the base 311 (see Figure 9It will be appreciated that the third wall 310c and the fourth wall 310d can restrict the movement of the second pin 362 along the Y-axis. In other embodiments, one end of the second shaft portion 3621 of the second pin 362 can abut against the wall of the third rotation shaft groove 3118, while the other end of the second shaft portion 3621 of the second pin 362 can abut against the wall of the fourth rotation shaft groove 3119. In this way, the walls of the third rotation shaft groove 3118 and the fourth rotation shaft groove 3119 can be used to restrict the movement of the second pin 362 along the Y-axis.

[0235] See also Figure 28 , and combined with Figure 27 As shown, Figure 28 yes Figure 5 The figure shows a partial cross-sectional view of the folding mechanism 301. When the first housing 312 is fixed to the base 311, the first housing 312 and the base 311 enclose an accommodating space 312a. The rotating end 34a of the first connecting arm 34, the rotating end 35b of the second connecting arm 35, the first pin 361, the second pin 362, the first gear 363, the second gear 364, the first engaging member 365, the second engaging member 366, the third engaging member 367, the fourth engaging member 368, the first elastic member 369a, and the second elastic member 369b are disposed in the accommodating space 312a. At this time, the first housing 312 covers the rotating end 34b of the first connecting arm 34, the rotating end 35b of the second connecting arm 35, the first pin 361, the second pin 362, the first gear 363, the second gear 364, the first engaging member 365, the second engaging member 366, the third engaging member 367, the fourth engaging member 368, the first elastic member 369a, and the second elastic member 369b. Thus, the first housing 312 cooperates with the base 311 to restrict the rotating end 34b of the first connecting arm 34, the rotating end 35b of the second connecting arm 35, the first pin 361, the second pin 362, the first gear 363, the second gear 364, the first engaging member 365, the second engaging member 366, the third engaging member 367, the fourth engaging member 368, the first elastic member 369a, and the second elastic member 369b from moving along the Z-axis, thereby improving the stability of the folding mechanism 301.

[0236] in addition, Figure 28 It is shown that the cooperation between the first housing 312 and the base 311 can restrict the first shaft portion 3611 of the first pin shaft 361 and the second shaft portion 3621 of the second pin shaft 362 from moving along the X-axis direction and the Z-axis direction.

[0237] Please refer again Figure 27The rotating end 34b of the first connecting arm 34 is engaged with the rotating end 35b of the second connecting arm 35 through the first gear 363 and the second gear 364. The first gear 363 and the second gear 364 are engaged with each other, and the first gear 363 is engaged with the first gear portion 344 of the rotating end 34b of the first connecting arm 34 (see Figure 14 The second gear 364 engages with the second gear portion 354 of the rotating end 35b of the second connecting arm 35 (see Figure 14 In this way, the rotation angle of the rotating end 34b of the first connecting arm 34 and the rotation angle of the rotating end 35b of the second connecting arm 35 can be the same in magnitude and opposite in direction, so that the rotation movements of the first connecting arm 34 and the second connecting arm 35 relative to the main shaft 31 remain synchronized.

[0238] In this embodiment, the first fixing frame 32 is fixed to the first housing 302 (see Figure 13 The rotating end 34b of the first connecting arm 34 is rotatably connected to the main shaft 31, and the sliding end 34a is slidably connected to the first fixing frame 32 and the second fixing frame 33 is fixed to the second housing 303 (see Figure 13 ), the rotating end 35b of the second connecting arm 35 is rotationally connected to the main shaft 31, and the sliding end 35a is slidingly connected to the second fixed frame 33. When the folding structure 301 is converted from a folded state to an unfolded state, or from an unfolded state to a folded state, the first shell 302 and the second shell 303 rotate relative to each other. The first shell 302 can drive the first connecting arm 34 to rotate relative to the main shaft 31 through the first fixed frame 32, and the second shell 303 can drive the second connecting arm 35 to rotate relative to the main shaft 31 through the second fixed frame 33. Furthermore, because the rotating end 34b of the first connecting arm 34 engages the rotating end 35b of the second connecting arm 35 via the first gear 363 and the second gear 364, when the first connecting arm 34 and the second connecting arm 35 rotate relative to the main shaft 31, the first gear 363 rotates with the first connecting arm 34 relative to the main shaft 31, the first pin 361 and the third matching member 367 rotate relative to the main shaft 31, the second gear 364 rotates with the second connecting arm 35 relative to the main shaft 31, and the second pin 362 and the fourth matching member 368 rotate relative to the main shaft 31. Furthermore, because the first gear 363 and the second gear 364 form a cam structure with the first matching member 365, the first matching member 365 can slide relative to the first pin 361 and the second pin 362. Thus, the first matching member 365 can slide in a direction toward or away from the first gear 363 and the second gear 364. In addition, since the third matching member 367 and the fourth matching member 368 form a cam structure with the second matching member 366 , the second matching member 366 can slide in a direction close to or away from the third matching member 367 and the fourth matching member 368 .

[0239] In this embodiment, during the sliding of the first engaging member 365 relative to the first and second pins 361 and 362, and during the sliding of the second engaging member 366 relative to the first and second pins 361 and 362, the first and second engaging members 365 and 366 slide in opposite directions. Specifically, when the first engaging member 365 slides away from the first gear 363 and the second gear 364, the second engaging member 366 slides away from the third and fourth engaging members 367 and 368. At this time, the first engaging member 365 compresses the first and second elastic members 369a and 369b, causing the first and second elastic members 369a and 369b to generate a first deformation a. The second engaging member 366 can also compress the first and second elastic members 369a and 369b, causing the first and second elastic members 369a and 369b to generate a second deformation b. Therefore, the first and second mating members 365 and 366 can compress the first and second elastic members 369a and 369b, causing the first and second elastic members 369a and 369b to generate two superimposed deformations simultaneously, resulting in a total deformation of a + b. When the first mating member 365 slides toward the first and second gears 363 and 364, the second mating member 366 slides toward the third and fourth mating members 367 and 368. At this point, the first and second elastic members 369a and 369b can release the two superimposed deformations simultaneously.

[0240] It will be appreciated that, as described above, when the first gear 363 and the second gear 364 form a cam structure with the first mating member 365, the first mating member 365 can slide relative to the first pin 361 and the second pin 362. The following, in conjunction with the relevant figures, exemplifies one possible mechanism by which the first mating member 365 can slide relative to the first pin 361 and the second pin 362. In other embodiments, the first gear 363 and the second gear 364 can also form other cam structures with the first mating member 365. This is not a limitation in this embodiment.

[0241] See also Figure 27 When the folding mechanism 301 is in the unfolded state, the first gear 363, the second gear 364 and the first matching member 365 form a first cam structure. Figure 29 , Figure 29 yes Figure 27The diagram shows a schematic diagram of the structure of the folding mechanism 301 in a closed state. When the folding mechanism 301 is in the closed state, the first gear 363, the second gear 364 and the first matching member 365 form a second cam structure. In this embodiment, the first cam structure and the second cam structure can make the first gear 363 and the second gear 364 stay in a certain position relative to the first matching member 365, that is, the first connecting arm 34 and the second connecting arm 35 maintain a certain relative position relationship with the main shaft 31, so that the first housing 302 (see Figure 13 ) and the second housing 303 (see Figure 13 ) can better maintain the open or closed state, improving the user experience. In addition, the first cam structure and the second cam structure can provide a certain amount of resistance when the electronic device 100 is unfolded to enter the open state and folded to release the open state, allowing the user to experience a better sense of mechanical operation.

[0242] Please refer again Figure 22a , and combined with Figure 21 As shown, when the first gear 363, the second gear 364, and the first mating member 365 are in the first cam configuration or the second cam configuration, the multiple first protrusions 3632 of the first gear 363 and the first first protrusion group 3652 on the first mating member 365 form a staggered cam configuration. The multiple second protrusions 3642 of the second gear 364 and the second first protrusion group 3652 on the first mating member 365 form a staggered cam configuration. In other words, the multiple first protrusions 3632 of the first gear 363 and the grooves (formed between two adjacent first protrusions 3654) on the first mating member 365 form a concave-convex cam configuration. The multiple second protrusions 3642 of the second gear 364 and the grooves on the first mating member 365 form a concave-convex cam configuration. The difference between the first cam structure and the second cam structure is that the first gear 363 and the second gear 364 rotate relative to the first mating part 365, the same first protrusion 3632 of the first gear 363 cooperates with different grooves on the first mating part 365, and the same second protrusion 3642 on the second gear 364 cooperates with different grooves on the first mating part 365.

[0243] When the folding structure 301 is converted from the folded state to the flattened state, or from the flattened state to the folded state, that is, when the folding structure 301 is in the process of folding or flattening, the first gear 363 and the second gear 364 rotate relative to the first matching piece 365, and the first protrusion 3632 of the first gear 363 can slide out of one of the grooves on the first matching piece 365 and then move in the direction of the other groove, that is, the matching structure of "first protrusion 3632-groove" is transformed into a transition structure of "first protrusion 3632-first protrusion 3654", and then transformed into a matching structure of "first protrusion 3632-another groove", and the second protrusion 3642 of the second gear 364 can also slide out of one of the grooves on the first matching piece 365 and then move in the direction of the other groove, that is, the matching structure of "second protrusion 3642-groove" is transformed into a transition structure of "second protrusion 3642-first protrusion 3654", and then transformed into the matching structure of "second protrusion 3642-another groove". At this time, the first matching member 365 is in a "close-away-close" positional relationship relative to the first gear 363 and the second gear 364. In this way, the first matching member 365 can slide relative to the first pin 361 and the second pin 362.

[0244] It should be noted that when the folding structure 301 is folding or flattening, the mating structure between the first gear 363 and the first mating member 365 is not limited to transitioning from a "first protrusion 3632 - groove" mating structure to a "first protrusion 3632 - first block 3654" mating structure, and then to a "first protrusion 3632 - another groove" mating structure. For example, when there are multiple first blocks 3654, the first protrusion 3632 will form a transitional structure with multiple first blocks 3654, and also with multiple grooves. For example, when the folding structure 301 is in the process of folding or flattening, the mating structure between the first gear 363 and the first mating member 365 can change from a mating structure of "first protrusion 3632-groove" to a transitional structure of "first protrusion 3632-first bump 3654", then to a transitional structure of "first protrusion 3632-another groove", then to a transitional structure of "first protrusion 3632-another first bump 3654", and finally to a mating structure of "first protrusion 3632-another groove". Similarly, when the folding structure 301 is in the process of folding or flattening, the mating structure between the second gear 364 and the first mating member 365 is not limited to a mating structure of "second protrusion 3642-groove" to a transitional structure of "second protrusion 3642-first bump 3654", then to a mating structure of "second protrusion 3642-another groove".

[0245] It is understood that the above description describes that when the third and fourth mating members 367, 368 form a cam structure with the second mating member 366, the second mating member 366 can slide toward or away from the third and fourth mating members 367, 368. The following description, with reference to the relevant drawings, illustrates an illustrative embodiment of how the second mating member 366 can slide relative to the first and second pins 361, 362.

[0246] Please refer again Figure 27 When the folding mechanism 301 is in the unfolded state, the third matching member 367, the fourth matching member 368 and the second matching member 366 form a third cam structure. Figure 29 When the folding mechanism 301 is in the closed state, the third and fourth fitting members 367, 368 and the second fitting member 366 form a fourth cam structure. In this embodiment, the third and fourth cam structures can make the third and fourth fitting members 367, 368 stay at certain positions relative to the second fitting member 366, that is, the first connecting arm 34 and the second connecting arm 35 maintain a certain relative position relationship with respect to the main shaft 31, so that the first housing 302 (see Figure 13 ) and the second housing 303 (see Figure 13 ) can better maintain the open or closed state, improving the user experience. In addition, the third and fourth cam structures can provide a certain amount of resistance when the electronic device 100 is unfolded to enter the open state and folded to release the open state, allowing the user to experience a better sense of mechanical operation.

[0247] Please refer again Figure 26 , and combined with Figure 23 and Figure 25As shown, when the third mating member 367, the fourth mating member 368, and the second mating member 366 are in the third cam configuration or the fourth cam configuration, the third lug group 3672 of the third mating member 367 and the first second lug group 3662 on the second mating member 366 form a staggered cam configuration. The fourth lug group 3682 of the fourth mating member 368 and the second second lug group 3662 on the second mating member 366 form a staggered cam configuration. In other words, the multiple third lugs 3674 of the third mating member 367 and the grooves (formed between two adjacent second lugs 3664) on the second mating member 366 form a concave-convex cam configuration. The multiple fourth lugs 3684 of the fourth mating member 368 and the grooves on the second mating member 366 form a concave-convex cam configuration. The difference between the third cam structure and the fourth cam structure is that the third mating part 367 and the fourth mating part 368 rotate relative to the second mating part 366, and the same third protrusion 3674 of the third mating part 367 cooperates with different grooves on the second mating part 366, and the same fourth protrusion 3684 on the fourth mating part 368 cooperates with different grooves on the second mating part 366.

[0248] Among them, when the folding structure 301 is transformed from a folded state to a flattened state, or from a flattened state to a folded state, that is, when the folding structure 301 is in the folding or flattening process, the third mating piece 367 and the fourth mating piece 368 rotate relative to the second mating piece 366, and the third protrusion 3674 of the third mating piece 367 can slide out of one of the grooves on the second mating piece 366, and then move in the direction of the other groove, that is, the mating structure of "third protrusion 3674-groove" is transformed into a transition structure of "third protrusion 3674-second protrusion 3664", and then transformed into a mating structure of "third protrusion 3674-another groove". The fourth protrusion 3684 of the fourth mating member 368 can also slide out of one of the grooves on the second mating member 366 and then move toward the other groove. This transitions the mating structure from "fourth protrusion 3684 - groove" to a transitional structure of "second protrusion 3642 - second protrusion 3664," and then to "fourth protrusion 3684 - another groove." At this point, the second mating member 366 assumes an "approach-away-approach" positional relationship relative to the third mating member 367 and the fourth mating member 368. This allows the second mating member 366 to slide relative to the first pin 361 and the second pin 362.

[0249] It should be noted that when folding structure 301 is folding or flattening, the mating structure between third mating member 367 and second mating member 366 is not limited to transitioning from a "third protrusion 3674 - groove" mating structure to a "third protrusion 3674 - second protrusion 3664" transitional structure, and then to a "third protrusion 3674 - another groove" mating structure. For example, if there are multiple second protrusions 3664, third protrusion 3674 will form a transitional structure with multiple second protrusions 3664, and also with multiple grooves. For example, when the folding structure 301 is in the process of folding or flattening, the mating structure between the third mating member 367 and the second mating member 366 can also change from a mating structure of "third protrusion 3674 - groove" to a transitional structure of "third protrusion 3674 - second protrusion 3664", then to a transitional structure of "third protrusion 3674 - another groove", then to a transitional structure of "third protrusion 3674 - another second protrusion 3664", and finally to a mating structure of "third protrusion 3674 - another groove". Similarly, when the folding structure 301 is in the process of folding or flattening, the mating structure between the fourth mating member 368 and the second mating member 366 is not limited to changing from a mating structure of "fourth protrusion 3684 - groove" to a transitional structure of "second protrusion 3642 - second protrusion 3664", then to a mating structure of "fourth protrusion 3684 - another groove".

[0250] Please refer again Figure 27 By setting a damping member 36 between the first connecting arm 34 and the second connecting arm 35 (see Figure 17 ), so that during the unfolding or folding process of the electronic device 100, the first elastic member 369a and the second elastic member 369b of the damping member 36 can be deformed, and the first elastic member 369a and the second elastic member 369b can squeeze the first matching member 365. At this time, the first matching member 365 can apply a force to the first gear 363 and the second gear 364. In this way, the friction between the first gear 363, the second gear 364 and the first matching member 365 can be greatly increased. The speed at which the first gear 363 and the second gear 364 rotate relative to the main shaft 31 slows down, the speed at which the first connecting arm 34 and the second connecting arm 35 rotate relative to the main shaft 31 slows down, and the speed at which the first shell 302 and the second shell 303 rotate relative to the main shaft 31 slows down. Therefore, during the process of the electronic device 100 unfolding to enter the open state and folding to release the open state, a certain resistance is provided, so that the user can experience a better sense of mechanical operation.

[0251] Furthermore, during the unfolding or folding process of the electronic device 100, the first elastic member 369a and the second elastic member 369b can generate a first deformation a under the cooperation of the first gear 363, the second gear 364, and the first mating member 365, and can also generate a second deformation b under the cooperation of the third mating member 367, the fourth mating member 368, and the second mating member 366. Thus, during the unfolding or folding process of the electronic device 100, the first elastic member 369a and the second elastic member 369b can generate two superimposed deformations at once, i.e., the total deformation is a + b, and the first elastic member 369a and the second elastic member 369b can generate a larger deformation at once.

[0252] In this embodiment, the two ends of the rotating end 34b of the first connecting arm 34 do not need to form a cam structure with other components to achieve the total deformation of the first elastic member 369a and the second elastic member 369b to generate a + b at one time. In this way, the two ends of the rotating end 34b of the first connecting arm 34 do not need to be provided with a set of protrusions, and the length of the rotating end 34b of the first connecting arm 34 can be miniaturized. In addition, when the rotating end 34b of the first connecting arm 34 is rotatably connected to the main shaft 31, the first avoidance space 3113 of the base 311 (see Figure 8 and Figure 9 ) can also be miniaturized in the Y-axis direction. The first support surface 304 of the base 311 (see Figure 8 ) has a higher flatness. It is understandable that since the first support surface 304 of the base 311 can be used to support the flexible screen 2 (see Figure 2 ), the first support surface 304 with higher flatness is not easy to damage the flexible screen 2, thereby improving the reliability of the flexible screen 2. Similarly, the length of the rotating end 35b of the second connecting arm 35 can also be miniaturized. In addition, the second avoidance space 3114 of the base 311 (see Figure 8 and Figure 9 ) The size in the Y-axis direction can also be miniaturized, and the flatness of the first supporting surface 304 of the base 311 can be further improved.

[0253] It is understood that during the unfolding or folding process of the electronic device 100, the first elastic member 369a can press the first gear 363 toward the first limiting flange 3612 of the first pin 361 through the first mating member 365. The position of the first gear 363 relative to the first pin 361 is fixed. Thus, compared to a solution in which the first gear 363 slides relative to the first pin 361, the first gear 363 of this embodiment is more stable, which helps to improve the stability of the folding mechanism 301. Similarly, compared to a solution in which the second gear 364 slides relative to the second pin 362, the second gear 364 of this embodiment is more stable, which helps to improve the stability of the folding mechanism 301.

[0254] The above description specifically describes the structure of the damping member 36 and the position and function of the damping member 36 in the folding mechanism 301 in conjunction with the relevant drawings. The following description specifically describes the implementation of the damping member 36 in conjunction with the relevant drawings.

[0255] See also Figure 30a and Figure 30b , Figure 30a yes Figure 5 The folding mechanism 301 is shown as a partial cross-sectional schematic diagram in another embodiment. Figure 30b yes Figure 30a The structure diagram of the fixing member 50 of the folding mechanism 301 shown is shown. The folding mechanism 301 also includes the fixing member 50. The fixing member 50 is provided with a first limiting hole 51 and a second limiting hole 52 arranged at intervals. The fixing member 50 is fixedly connected to the base 311. For example, the fixing member 50 can be fixedly connected to the base 311 by welding, bonding, locking or snapping with a fastener (screw, screw, etc.). In addition, one end of the first pin 361 is inserted into the first limiting hole 51. The first pin 361 can rotate relative to the first limiting hole 51. One end of the second pin 362 is inserted into the second limiting hole 52. The second pin 362 can rotate relative to the second limiting hole 52. When the first housing 312 is fixed to the base 311, the first housing 312 is also fixedly connected to the fixing member 50. For example, the fixing member 50 can be fixedly connected to the first housing 312 by welding, bonding, locking or snapping with a fastener (screw, screw, etc.).

[0256] It is understandable that by setting the fixing member 50 between the first housing 312 and the base 311, the first limiting hole 51 limits the first pin 361, and the second limiting hole 52 limits the second pin 362. Figure 27 As shown, the first gear 363, the second gear 364, the first engaging member 365, the second engaging member 366, the third engaging member 367, the fourth engaging member 368, the first elastic member 369a, and the second elastic member 369b disposed on the first pin 361 and the second pin 362 are not easily shaken, that is, the stability is improved. In addition, during the folding or flattening process of the electronic device 100, the first pin 361, the second pin 362, the first gear 363, the second gear 364, the first engaging member 365, the second engaging member 366, the third engaging member 367, the fourth engaging member 368, the first elastic member 369a, and the second elastic member 369b are not easily squeezed by the first housing 312, thereby causing the first housing 312 to separate from the base 311.

[0257] It should be noted that this embodiment does not limit the number of fixing members 50. For example, the number of fixing members 50 is multiple. The multiple fixing members 50 are arranged along the length direction of the first pin 361. In addition, this embodiment does not specifically limit the shape of the fixing member 50, that is, the shape of the fixing member 50 is not limited to Figure 30a For example, see Figure 30c , Figure 30c yes Figure 5 The schematic partial cross-section of another embodiment of the folding mechanism 301 is shown. The fixing member 50 is composed of two ring-shaped structures connected by a strip structure. In this way, the volume of the fixing member 50 is relatively small.

[0258] The above description specifically introduces several embodiments of the coordination of the damping member 36 with other components in conjunction with the relevant drawings. The following description specifically introduces other components of the folding mechanism 301 in conjunction with the relevant drawings.

[0259] See also Figure 31 , Figure 31 yes Figure 6 The first subassembly 37 is an exploded view of the first subassembly 37. The first subassembly 37 includes a first screw rod 371, a second screw rod 372, a first rotating shaft 373, a second rotating shaft 374, a sliding block 375, a first transmission arm 376, a first connecting rod 377, a second transmission arm 378 and a second connecting rod 379.

[0260] See also Figure 32 , Figure 32 yes Figure 31 The diagram shows the structure of the first spiral rod 371 and the second spiral rod 372 of the first subassembly 37. The first spiral rod 371 includes a first end portion 3711, a middle portion 3712, and a second end portion 3713, which are connected in sequence. The middle portion 3712 of the first spiral rod 371 is provided with a first spiral groove 3714. The first spiral groove 3714 spirally extends from one end of the middle portion 3712 of the first spiral rod 371 to the other end of the middle portion 3712 of the first spiral rod 371.

[0261] The radius of the middle portion 3712 of the first spiral rod 371 can be larger than the radius of the first end portion 3711 of the first spiral rod 371 and the radius of the second end portion 3713 of the first spiral rod 371. In this way, the overall strength of the first spiral rod 371 is not easily reduced due to the provision of the first spiral groove 3714 in the middle portion 3712 of the first spiral rod 371.

[0262] See also Figure 33 , and combined with Figure 32 As shown, Figure 33 yes Figure 5Schematic diagram of the partial structure of the folding mechanism 301 shown. Part of the first screw rod 371 is arranged on the base 311, and the two ends are respectively arranged in the two first limiting grooves 3111 of the base 311. The two ends of the first screw rod 371 can rotate relative to the two first limiting grooves 3111. In addition, the first end 3711 of the first screw rod 371 is fixedly connected to the rotating end 34b of the first connecting arm 34. Exemplarily, the first end 3711 of the first screw rod 371 can be fixedly connected to the rotating end 34b of the first connecting arm 34. The connection relationship between the first end 3711 of the first screw rod 371 and the rotating end 34b of the first connecting arm 34 can refer to the connection relationship between the first gear 363 and the first pin 361 (see Figures 18 to 20 ). In other embodiments, the first end portion 3711 of the first screw rod 371 can also be fixedly connected to the rotating end 34b of the first connecting arm 34 by welding, bonding, or interference fit. In this way, on the one hand, one end of the rotating end 34b of the first connecting arm 34 can be rotatably connected to the base 311 through the first screw rod 371. On the other hand, the rotating end 34b of the first connecting arm 34 can be limited in the Y-axis direction by the first screw rod 371. In addition, the two ends of the middle portion 3712 of the first screw rod 371 can be abutted against the wall surface of the base 311. In this way, the movement of the first screw rod 371 along the Y-axis direction can be limited by the wall surface of the base 311.

[0263] In this embodiment, the second screw rod 372 and the first screw rod 371 can be of the same or similar structure, symmetrical or partially symmetrical structure, or different structure. In some embodiments, the second screw rod 372 and the first screw rod 371 are symmetrical structures, and the basic design of the component structure of the second screw rod 372 (for example, please refer to Figure 32 The second screw rod 372 includes a second spiral groove 3724. The second spiral groove 3724 spirally extends along the extension direction of the main shaft 31. Regarding the design of the connection relationship between components, and the design of the connection relationship between components and other structures outside the assembly, reference can be made to the relevant schemes of the first screw rod 371 (for example, a portion of the second screw rod 372 is disposed on the base 311, and both ends are rotatably connected to the two second limiting grooves 3112). At the same time, the second screw rod 372 and the first screw rod 371 are allowed to have slight differences in the detailed structure or position arrangement of the components.

[0264] Please refer again Figure 31, part of the first rotating shaft 373 is arranged in the first avoidance space 3113, and the two ends are respectively arranged in the two first limiting grooves 3111 of the base 311. The two ends of the first rotating shaft 373 can rotate relative to the two first limiting grooves 3111. In addition, one end of the first rotating shaft 373 can be fixed to the second end 3713 of the first screw rod 371. The connection relationship between the first rotating shaft 373 and the second end 3713 of the first screw rod 371 can refer to the connection relationship between the first gear 363 and the first pin 361. In other embodiments, the first rotating shaft 373 can also be fixedly connected to the second end 3713 of the first screw rod 371 by welding, bonding or interference fit.

[0265] In this embodiment, the second rotating shaft 374 and the first rotating shaft 373 can have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In some embodiments, the second rotating shaft 374 and the first rotating shaft 373 are symmetrical structures. The basic design of the component structure of the second rotating shaft 374, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the assembly can all refer to the relevant solutions of the first rotating shaft 373 (for example, the two ends of the second rotating shaft 374 can rotate relative to the two second limiting grooves 3112). At the same time, the second rotating shaft 374 and the first rotating shaft 373 can have slight differences in the detailed structure or position arrangement of the components.

[0266] See also Figure 34 , and combined with Figure 31 As shown, Figure 34 yes Figure 31 The structure diagram of the sliding block 375 of the first subassembly 37 is shown. The sliding block 375 includes a main body 3751, a first annular portion 3752, a second annular portion 3753, a third annular portion 3754, a fourth annular portion 3755, a first protrusion 3756 and a second protrusion 3757. The main body 3751 includes a first side surface 3751a and a second side surface 3751b facing opposite directions. Figure 31 The second side 3751b is shown from another angle. The first annular portion 3752 and the third annular portion 3754 are connected to the first side 3751a at intervals. The second annular portion 3753 and the fourth annular portion 3755 are connected to the second side 3751b at intervals. The first protrusion 3756 is connected to the first side 3751a and is located on the side of the first annular portion 3752 away from the third annular portion 3754. The second protrusion 3757 is connected to the second side 3751b and is located on the side of the second annular portion 3753 away from the fourth annular portion 3755. At this time, the sliding block 375 is roughly "frog-shaped." In this embodiment, the sliding block 375 is a one-piece molded structure.

[0267] In addition, each of the first annular portion 3752, the second annular portion 3753, the third annular portion 3754, and the fourth annular portion 3755 is provided with a through hole 3751c. The through hole 3751c of the first annular portion 3752 is arranged opposite the through hole 3751c of the third annular portion 3754. The through hole 3751c of the second annular portion 3753 is arranged opposite the through hole 3751c of the fourth annular portion 3755.

[0268] See also Figure 35 , and combined with Figure 33 and Figure 34 As shown, Figure 35 yes Figure 5 A schematic diagram of a portion of the folding mechanism 301 is shown. The sliding block 375 is slidably connected to the base 311. A portion of the main body 3751 is disposed on the base 311. The first annular portion 3752 and the third annular portion 3754 are located within a first escape space 3113, while the second annular portion 3753 and the fourth annular portion 3755 are located within a second escape space 3114.

[0269] In addition, at least a portion of the first protrusion 3756 of the sliding block 375 is slidably connected to the first spiral groove 3714 of the first spiral rod 371 . At least a portion of the second protrusion 3757 of the sliding block 375 is slidably connected to the second spiral groove 3724 of the second spiral rod 372 .

[0270] In addition, the through hole 3751c of the first annular portion 3752 and the through hole 3751c of the third annular portion 3754 pass through the first rotating shaft 373. The first annular portion 3752 and the third annular portion 3754 can slide relative to the first rotating shaft 373 along the Y-axis direction.

[0271] In addition, the through hole 3751c of the second annular portion 3753 and the through hole 3751c of the fourth annular portion 3755 pass through the second rotating shaft 374. The second annular portion 3753 and the fourth annular portion 3755 can slide relative to the second rotating shaft 374 along the Y-axis direction.

[0272] It is understood that when the first screw rod 371 rotates, the first protrusion 3756 of the sliding block 375 exerts a force on the groove wall of the first spiral groove 3714 of the first screw rod 371, causing the first screw rod 371 to tend to slide along the Y-axis direction. Because the first screw rod 371 is limited in the Y-axis direction, the first screw rod 371 will not slide along the Y-axis direction under the force of the first protrusion 3756 of the sliding block 375. In addition, the groove wall of the first spiral groove 3714 of the first screw rod 371 also exerts a reaction force on the first protrusion 3756 of the sliding block 375. At this time, the sliding block 375 is not limited in the Y-axis direction and can slide along the Y-axis direction. Similarly, when the second screw rod 372 rotates, the sliding block 375 can also slide along the Y-axis direction.

[0273] Thus, when the first screw rod 371 and the second screw rod 372 rotate, the sliding block 375 can slide along the Y-axis. At this time, the first annular portion 3752 and the third annular portion 3754 slide along the Y-axis relative to the first rotating shaft 373. The second annular portion 3753 and the fourth annular portion 3755 slide along the Y-axis relative to the second rotating shaft 374.

[0274] See also Figure 36 , and combined with Figure 31 As shown, Figure 36 yes Figure 31 FIG. 3 is a schematic structural diagram of the first transmission arm 376 of the first subassembly 37 . The first transmission arm 376 includes a first shaft sleeve portion 3761 and a first connecting portion 3762 connected to the first shaft sleeve portion 3761 .

[0275] See also Figure 37 , and combined with Figure 35 and Figure 36 As shown, Figure 37 yes Figure 5 A partial structural diagram of the folding mechanism 301 is shown. The first sleeve portion 3761 is sleeved on the first rotating shaft 373 and is located between the first annular portion 3752 and the third annular portion 3754 of the sliding block 375. The first sleeve portion 3761 can both slide and rotate relative to the first rotating shaft 373. Thus, when the first annular portion 3752 and the third annular portion 3754 of the sliding block 375 slide relative to the first rotating shaft 373 along the Y-axis, the first sleeve portion 3761 also slides along the Y-axis. At this time, the first connecting portion 3762 can also move along the Y-axis.

[0276] In this embodiment, the first screw rod 371 and the sliding block 375 form a spiral substructure. At this time, the first transmission arm 376 is connected to the rotating end 34b of the first connecting arm 34 via the spiral substructure, so that the rotation of the rotating end 34b of the first connecting arm 34 relative to the base 311 can be converted into the sliding of the first transmission arm 376 relative to the main shaft 31 through the spiral substructure.

[0277] In other embodiments, the first subassembly 37 may not include the first screw rod 371 and the sliding block 375. In this case, by setting the shape between the first transmission arm 376 and the rotating end 34b of the first connecting arm 34, a spiral substructure is formed between the first transmission arm 376 and the rotating end 34b of the first connecting arm 34.

[0278] In other embodiments, the first subassembly 37 may not include the first screw rod 371 and the sliding block 375. In this case, another screw substructure (such as a ball screw) is provided between the first transmission arm 376 and the rotating end 34b of the first connecting arm 34 for connection.

[0279] In this embodiment, the second transmission arm 378 and the first transmission arm 376 can have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In some embodiments, the second transmission arm 378 and the first transmission arm 376 have symmetrical structures. The basic design of the component structure of the second transmission arm 378, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the assembly can all refer to the relevant solutions of the first transmission arm 376 (for example, the connection relationship between the second transmission arm 378 and the second rotating shaft 374 and the sliding block 375). At the same time, the second transmission arm 378 and the first transmission arm 376 can be slightly different in the detailed structure or position arrangement of the components.

[0280] See also Figure 38 , Figure 38 yes Figure 5 A partial structural diagram of the folding mechanism 301 is shown. One end of the first connecting rod 377 is rotatably connected to the first connecting portion 3762 of the first transmission arm 376, and the other end is rotatably connected to the first fixing frame 32. For example, by sequentially passing a pin through the first connecting rod 377 and the first connecting portion 3762 of the first transmission arm 376, the pin can rotate relative to the first connecting rod 377 and the first transmission arm 376.

[0281] Please also refer to Figure 38 and Figure 39 , Figure 39 yes Figure 38 The diagram shows the structure of the partially folding mechanism 301 in the closed state. When the electronic device 100 folds from the flattened state to the closed state, the first sleeve portion 3761 slides relative to the first rotating shaft 373 in the negative direction of the Y-axis, and one end of the first connecting rod 377 moves relative to the first rotating shaft 373 in the negative direction of the Y-axis. At this time, the other end of the first connecting rod 377 can apply a force to the first fixing frame 32. The first fixing frame 32 can move in the negative direction of the X-axis, that is, the first fixing frame 32 can move in a direction away from the base 311.

[0282] When the electronic device 100 is unfolded from the closed state to the flat state, the first sleeve portion 3761 slides relative to the first rotating shaft 373 in the positive direction of the Y-axis, and one end of the first connecting rod 377 moves relative to the first rotating shaft 373 in the positive direction of the Y-axis. At this time, the other end of the first connecting rod 377 can apply a force to the first fixing frame 32. The first fixing frame 32 can move in the positive direction of the X-axis, that is, the first fixing frame 32 approaches the base 311.

[0283] In this embodiment, the second connecting rod 379 and the first connecting rod 377 can have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In some embodiments, the second connecting rod 379 and the first connecting rod 377 have symmetrical structures. The basic design of the component structure of the second connecting rod 379, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the assembly can refer to the relevant solutions of the first connecting rod 377 (for example, the connection relationship between the second connecting rod 379 and the second transmission arm 378 and the second fixing bracket 33). At the same time, the second connecting rod 379 and the first connecting rod 377 can be slightly different in the detailed structure or position arrangement of the components.

[0284] See also Figure 40 , Figure 40 yes Figure 6 The exploded schematic diagram of the second subassembly 38 is shown. The second subassembly 38 includes a third screw rod 381, a fourth screw rod 382, ​​a third rotating shaft 383, a fourth rotating shaft 384, a sliding block 385, a third transmission arm 386, a third connecting rod 387, a fourth transmission arm 388 and a fourth connecting rod 389. Among them, the second subassembly 38 and the first subassembly 37 can be the same or similar structures, symmetrical or partially symmetrical structures, or different structures. In some embodiments, the second subassembly 38 and the first subassembly 37 are symmetrical structures. The basic design of the component structure of the second subassembly 38, the connection relationship design between the components, and the connection relationship design between the components and other structures outside the assembly can all refer to the relevant scheme of the first subassembly 37. At the same time, the second subassembly 38 and the first subassembly 37 are allowed to be slightly different in the detailed structure or position arrangement of the components. The details will not be repeated here.

[0285] See also Figure 41 , Figure 41 yes Figure 5 The diagram shows a partial structural diagram of the folding mechanism 301. The second subassembly 38 is located on the side of the damping member 36 away from the first subassembly 37. The second subassembly 38 and the first subassembly 37 are located on either side of the damping member 36, thereby improving the symmetry of the folding mechanism 301. This, on the one hand, simplifies the overall structure of the folding mechanism 301 and reduces manufacturing costs. On the other hand, when the folding mechanism 301 is used in the electronic device 100, the electronic device 100 is less likely to experience tilting or twisting issues caused by the lack of symmetry of the folding mechanism 301.

[0286] See also Figure 42 , Figure 42 yes Figure 6The diagram shows the structure of the first swing arm 41 and the second swing arm 42. The first swing arm 41 includes a rotating end 411 and a sliding end 412. The first swing arm 41 can be an integrally formed structural member to provide high structural strength. The rotating end 411 of the first swing arm 41 includes a main body 4111 and a rotating shaft 4112. The rotating shaft 4112 can include two parts, one protruding from each end of the main body 4111.

[0287] See also Figure 41 and Figure 42 The rotating end 411 of the first swing arm 41 is rotatably connected to the base 311. The main body 4111 of the rotating end 411 of the first swing arm 41 is disposed in the first avoidance space 3113 (see Figure 9 The two rotating shafts 4112 of the rotating end 411 of the first swing arm 41 are respectively disposed in the two first limiting grooves 3111 of the base 311 in a one-to-one correspondence. The two rotating shafts 4112 of the first swing arm 41 can rotate relative to the two first limiting grooves 3111 of the base 311.

[0288] In addition, the sliding end 412 of the first swing arm 41 is slidably connected to the first fixing frame 32. For example, the first swing arm 41 and the first fixing frame 32 can be slidably connected by the cooperation of the slider and the slide groove. The details are not repeated here.

[0289] like Figure 38 and Figure 39 As shown, the rotating end 411 of the first swing arm 41 is rotatably connected to the base 311. The sliding end 412 of the first swing arm 41 is slidably connected to the first fixed frame 32. In this way, the first fixed frame 32 can be rotatably connected to the base 311 through the first swing arm 41, and can be moved toward or away from the base 311 through the first swing arm 41.

[0290] In this embodiment, the second swing arm 42 and the first swing arm 41 can have the same structure, a mirror-symmetrical structure, a partially mirror-symmetrical structure, a centrally symmetrical structure, a partially centrally symmetrical structure, or different structures, and this application does not impose strict limitations on this. In some embodiments, the second swing arm 42 and the first swing arm 41 have symmetrical structures. The basic design of the component structure of the second swing arm 42, the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the assembly can all refer to the relevant solutions of the first swing arm 41. At the same time, the second swing arm 42 and the first swing arm 41 can have slight differences in the detailed structure or position arrangement of the components.

[0291] See also Figure 43 and Figure 44 , Figure 43 yes Figure 6 A schematic structural diagram of the first support plate 43 and the second support plate 44 is shown. Figure 44 yes Figure 43An enlarged schematic diagram of the first support plate 43 at point B is shown. The first support plate 43 has a first fixed surface 434. The first support plate 43 includes a first movable block 431 and a first pivot arm 432. The first movable block 431 and the first pivot arm 432 are both located on the first fixed surface 434. The first movable block 431 has a first arcuate hole 433. The first movable block 431 and the first pivot arm 432 of the first support plate 43 together form a connecting structure. The first support plate 43 may include multiple connecting structures arranged at intervals.

[0292] Please refer again Figure 41 , the first support plate 43 is provided on one side of the first fixing frame 32. The first fixing frame 32 is located on the first fixing surface 434 of the first support plate 43. The first support plate 43 is also rotatably connected to the first fixing frame 32. For example, the first rotating arm 432 of the first support plate 43 can be rotatably connected to the arc groove 327 of the first fixing frame 32. At this time, the first support plate 43 and the first fixing frame 32 are rotatably connected via the virtual axis of the arc arm and the arc groove. In this way, the first support plate 43 and the first fixing frame 32 can be made thinner, which is conducive to the thinning of the folding device 3. In other embodiments, the first support plate 43 and the first fixing frame 32 can also be rotatably connected via a physical axis.

[0293] Furthermore, the sliding end 412 of the first swing arm 41 is slidably and rotatably connected to the first support plate 43. For example, a rotating shaft passes through the sliding end 412 of the first swing arm 41 and the first arcuate hole 433 of the first movable block 431 of the first support plate 43. The rotating shaft can slide and rotate in the first arcuate hole 433 of the first support plate 43. The rotating shaft can be fixed relative to the sliding end 412 of the first swing arm 41.

[0294] In this embodiment, the second support plate 44 and the first support plate 43 can have the same structure, a mirror-symmetrical structure, a partially mirror-symmetrical structure, a centrally symmetrical structure, a partially centrally symmetrical structure, or different structures, and this application does not impose strict restrictions on this. In some embodiments, the second support plate 44 and the first support plate 43 have symmetrical structures. The basic design of the component structure of the second support plate 44, the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the assembly can all refer to the relevant solutions of the first support plate 43. At the same time, the second support plate 44 and the first support plate 43 can have slight differences in the detailed structure or position arrangement of the components.

[0295] Please refer again Figure 41 When the electronic device 100 is in the flattened state, the first fixing frame 32 and the second fixing frame 33 are in an open position relative to the main shaft 31, and the main shaft 31 is located between the first fixing frame 32 and the second fixing frame 33. At this time, the first support plate 43 and the second support plate 44 are relatively unfolded and in an open position.

[0296] Combine Figure 2 As shown, the first support plate 43 has a second support surface 305. The second support surface 305 is disposed opposite to the first fixing surface 434. The second support surface 305 can be a plane. The second support plate 44 has a third support surface 306. The third support surface 306 can be a plane.

[0297] When the electronic device 100 is in a flattened state, the second support surface 305 of the first support plate 43, the first support surface 304 of the main shaft 31 and the third support surface 306 of the second support plate 44 jointly support the bending portion 22 of the flexible screen 2, so that when the bending portion 22 is touched, the bending portion 22 is not easily damaged or dented due to external force, thereby improving the reliability of the flexible screen 2.

[0298] For example, when the electronic device 100 is in a flattened state, the first support surface 304 of the main shaft 31, the second support surface 305 of the first support plate 43, and the third support surface 306 of the second support plate 44 are flush. At this point, the flatness of the bent portion 22 of the flexible screen 2 is improved, providing a better user experience.

[0299] Combine Figure 4 As shown, when the electronic device 100 is in the closed state, the first support plate 43 and the second support plate 44 are located between the first housing 302 and the second housing 303, with the second support surface 305 of the first support plate 43 and the third support surface 306 of the second support plate 44 facing each other. The second support surface 305 of the first support plate 43 is inclined relative to the third support surface 306 of the second support plate 44. The first support plate 43 and the second support plate 44 are generally V-shaped. The second support surface 305 of the first support plate 43 and the third support surface 306 of the second support plate 44 support the bent portion 22, so that the bent portion 22 is generally formed into a "teardrop" shape.

[0300] The first connection assembly and the second connection assembly are described in detail above with reference to the relevant drawings. The third connection assembly will be described in detail below with reference to the relevant drawings.

[0301] See also Figure 45 , Figure 45 yes Figure 5 The third connecting assembly includes a third fixing bracket 45 , a fourth fixing bracket 46 , a third swing arm 47 , a fourth swing arm 48 and an auxiliary damping member 49 .

[0302] In this embodiment, the basic design of the component structure of the third fixing frame 45, the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the assembly can all refer to the relevant solutions of the first fixing frame 32. In addition, the fourth fixing frame 46 and the third fixing frame 45 can have the same structure, a symmetrical structure, a partially symmetrical structure, or different structures, and this application does not strictly limit this. Among them, the basic design of the component structure of the fourth fixing frame 46, the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the assembly can all refer to the relevant solutions of the second fixing frame 33, while allowing for slight differences in the detailed structure or position arrangement of the components of the fourth fixing frame 46 and the second fixing frame 33.

[0303] See also Figure 46 , Figure 46 yes Figure 45 The third swing arm 47 and the fourth swing arm 48 are shown in FIG. The third swing arm 47 includes a rotating end 471 and a sliding end 472. The third swing arm 47 can be an integrally formed structural member to have a high structural strength.

[0304] The rotating end 471 of the third swing arm 47 is provided with a first hole 4711. The first hole 4711 extends through both sides of the rotating end 471 of the third swing arm 47. The rotating end 471 of the third swing arm 47 has a plurality of third protrusions 4712 and a plurality of fourth protrusions 4713 on both sides. The plurality of third protrusions 4712 surround the first hole 4711 and are spaced apart from each other. The plurality of fourth protrusions 4713 surround the first hole 4711 and are spaced apart from each other.

[0305] In this embodiment, the fourth swing arm 48 and the third swing arm 47 can have the same structure, a symmetrical structure, a partially symmetrical structure, or different structures, and this application does not impose strict restrictions on this. The basic design of the component structure of the fourth swing arm 48 (for example, the fourth swing arm 48 includes a rotating end 481 and a sliding end 482. The rotating end 481 of the fourth swing arm 48 is provided with a second hole 4811, etc.), the design of the connection relationship between the components, and the design of the connection relationship between the components and other structures outside the assembly can all refer to the relevant solutions of the third swing arm 47. At the same time, the fourth swing arm 48 and the third swing arm 47 are allowed to have slight differences in the detailed structure or position arrangement of the components.

[0306] See also Figure 47 , Figure 47 yes Figure 5The schematic diagram of the partial structure of the folding mechanism 301 is shown. The sliding end 472 of the third swing arm 47 is slidably connected to the third fixing frame 45, and is slidably and rotatably connected to the first support plate 43. It can be understood that the connection relationship between the third swing arm 47 and the third fixing frame 45 and the first support plate 43 can refer to the connection relationship between the first swing arm 41 and the first fixing frame 32 and the first support plate 43 (see Figures 41 to 43 ). The details will not be described here.

[0307] Furthermore, the rotating end 471 of the third swing arm 47 is rotatably connected to the base 311. For example, the rotating end 471 of the third swing arm 47 is rotatably connected to the base 311 via an auxiliary damping member 49. The specific structure of the auxiliary damping member 49 will be described below and will not be further elaborated here.

[0308] The sliding end 482 of the fourth swing arm 48 is slidably connected to the fourth fixing frame 46, and is slidably and rotatably connected to the second support plate 44. It is understood that the connection relationship between the fourth swing arm 48, the fourth fixing frame 46, and the second support plate 44 can refer to the connection relationship between the second swing arm 42, the second fixing frame 33, and the second support plate 44 (see Figures 41 to 43 ). The details will not be described here.

[0309] Furthermore, the rotating end 481 of the fourth swing arm 48 is rotatably connected to the base 311. For example, the rotating end 481 of the fourth swing arm 48 is rotatably connected to the base 311 via an auxiliary damping member 49. The specific structure of the auxiliary damping member 49 will be described below and will not be further elaborated here.

[0310] See also Figure 48 , and combined with Figure 45 As shown, Figure 48 yes Figure 45 The figure shows an exploded schematic diagram of the auxiliary damping member 49. The auxiliary damping member 49 includes a first retaining member 491, a second retaining member 492, an elastic member 493, a first transfer shaft 494, a second transfer shaft 495, a plurality of third transfer shafts 496, and a fixing plate 497. The first retaining member 491, the second retaining member 492, and the fixing plate 497 are arranged in sequence and disposed opposite to each other. The second retaining member 492 is located between the first retaining member 491 and the fixing plate 497. The elastic member 493 is located between the second retaining member 492 and the fixing plate 497.

[0311] Illustratively, one side of the first retaining member 491 has a plurality of fifth protrusion groups 4911. The first retaining member 491 also includes a plurality of first through-holes 4912, which are spaced apart from one another. Each fifth protrusion group 4911 may include a plurality of fifth protrusions 4913, which are arranged in a ring shape and spaced apart from one another. The plurality of fifth protrusions 4913 surround a first through-hole 4912, with a retaining groove formed between adjacent fifth protrusions 4913. The first retaining member 491 may be an integrally formed structural member to provide greater structural strength.

[0312] Illustratively, one side of the second retaining member 492 includes a plurality of sixth protrusion groups 4921. The second retaining member 492 also includes a plurality of second through-holes 4922, which are spaced apart from each other. The plurality of sixth protrusion groups 4921 are disposed in a one-to-one correspondence with the plurality of second through-holes 4922. Each sixth protrusion group 4921 may include a plurality of sixth protrusions 4923, which are arranged in a ring shape and spaced apart from each other. The plurality of sixth protrusions 4923 are disposed around the second through-holes 4922, with retaining grooves formed between adjacent sixth protrusions 4923. The second retaining member 492 may be an integrally formed structural member to provide greater structural strength.

[0313] For example, the fixing plate 497 can be a plate structure. The fixing plate 497 includes a plurality of third through-holes 4971, which are spaced apart from each other. For example, the arrangement shape and arrangement spacing of the plurality of first through-holes 4912, the plurality of second through-holes 4922, and the plurality of third through-holes 4971 can be the same.

[0314] Please refer again Figure 48 , and combined with Figures 45 to 47 As shown, the elastic member 493 includes a plurality of springs 4931. The first adapter shaft 494 is connected to the first retaining member 491, the rotating end 471 of the third swing arm 47, the second retaining member 492, one of the springs 4931, and the fixing plate 497. In this way, a portion of the second retaining member 492 is located on one side of the rotating end 471 of the third swing arm 47. A portion of the fixing plate 497 is located on a side of the second retaining member 492 away from the rotating end 481 of the third swing arm 47. The first retaining member 491 and the fixing plate 497 are fixedly connected to the first adapter shaft 494. The rotating end 481 of the third swing arm 47 and the rotating end 471 of the third swing arm 47 are slidably connected to the first adapter shaft 494.

[0315] The first adapter shaft 494 passes through a first through-hole 4912 of the first retaining member 491, a first hole 4711 of the third swing arm 47, a second through-hole 4922 of the second retaining member 492, the inner space of one of the springs 4931, and a third through-hole 4971 of the fixing plate 497. The first adapter shaft 494 includes a first end and a second end disposed opposite each other. The first end of the first adapter shaft 494 is adjacent to the first retaining member 491 and protrudes relative to the first retaining member 491, while the second end of the first adapter shaft 494 is adjacent to the fixing plate 497 and protrudes relative to the fixing plate 497. For example, a limiting flange 4941 may be provided on the first end of the first adapter shaft 494. The limiting flange 4941 is located on a side of the first retaining member 491 away from the second retaining member 492. The limiting flange 4941 may abut against the first retaining member 491 to achieve position limiting. The second end of the first transfer shaft 494 can be fixedly connected to the fixing plate 497 by welding, bonding, etc. The spring 4931 is in a compressed state.

[0316] Exemplarily, there are two third adapter shafts 496. The third adapter shafts 496 and some of the springs 4931 are arranged in a one-to-one correspondence. The third adapter shaft 496 is inserted into the first retaining member 491, the second retaining member 492, another spring 4931, and the fixing plate 497. The first retaining member 491 and the fixing plate 497 are fixedly connected to the third adapter shaft 496. The second retaining member 492 is slidably connected to the third adapter shaft 496. The third adapter shaft 496 passes through the other second through-hole 4922 of the first retaining member 491, the other second through-hole 4922 of the second retaining member 492, the inner space of another spring 4931, and the other third through-hole 4971 of the fixing plate 497.

[0317] The third adapter shaft 496 includes a first end and a second end disposed opposite each other. The first end of the third adapter shaft 496 is adjacent to the first retaining member 491 and protrudes relative to the first retaining member 491, while the second end of the third adapter shaft 496 is adjacent to the fixed plate 497 and protrudes relative to the fixed plate 497. For example, the first end of the third adapter shaft 496 may be provided with a limiting flange 4961, which is located on a side of the first retaining member 491 away from the second retaining member 492. The limiting flange 4961 can abut against the first retaining member 491 to achieve position limiting. The second end of the third adapter shaft 496 may be fixedly connected to the fixed plate 497 by welding, bonding, or other methods. The spring 4931 is in a compressed state.

[0318] The second adapter shaft 495 is connected to the first retaining member 491, the rotating end 481 of the fourth swing arm 48, the second retaining member 492, another spring 4931, and the fixing plate 497. In this manner, a portion of the second retaining member 492 is located on one side of the rotating end 481 of the fourth swing arm 48. A portion of the fixing plate 497 is located on the side of the second retaining member 492 away from the rotating end 481 of the fourth swing arm 48. The first retaining member 491 and the fixing plate 497 are fixedly connected to the second adapter shaft 495. The rotating end 481 of the third swing arm 47 and the second retaining member 492 are slidably connected to the second adapter shaft 495.

[0319] The second adapter shaft 495 passes through the other first through-hole 4912 of the first retaining member 491, the second hole 4811 of the fourth swing arm 48, the other second through-hole 4922 of the second retaining member 492, the inner space of the other spring 4931, and the other third through-hole 4971 of the fixing plate 497. The second adapter shaft 495 includes a first end and a second end disposed opposite to each other. The first end of the second adapter shaft 495 is adjacent to the first retaining member 491 and protrudes relative to the first retaining member 491, while the second end of the second adapter shaft 495 is adjacent to the fixing plate 497 and protrudes relative to the fixing plate 497. For example, the first end of the second adapter shaft 495 may be provided with a limiting flange 4951. The limiting flange 4951 is located on a side of the first retaining member 491 away from the second retaining member 492. The limiting flange 4951 can abut against the first retaining member 491 to achieve limiting. The second end portion of the second transfer shaft 495 can be fixedly connected to the fixing plate 497 by welding, bonding, etc. The spring 4931 is in a compressed state.

[0320] See also Figures 46 to 48 Therefore, the multiple third protrusions 4712 of the third swing arm 47 and the multiple fifth protrusions 4913 of one of the fifth protrusion groups 4911 are arranged alternately to form a cam structure, and the multiple fourth protrusions 4713 of the third swing arm 47 and the multiple sixth protrusions 4723 of one of the sixth protrusion groups 4721 are arranged alternately to form a cam structure.

[0321] The connection relationship between the fourth swing arm 48 and the first and second retaining members 491, 492 can be referred to as the connection relationship between the third swing arm 47 and the first and second retaining members 491, 492. The details will not be repeated here. Thus, the rotating end 471 of the third swing arm 47 and the rotating end 481 of the fourth swing arm 48 are located between the first and second retaining members 491, 492.

[0322] It can be understood that the rotating end 471 of the third swing arm 47 and the rotating end 481 of the fourth swing arm 48 form a cam structure with the second locking member 492 and the first locking member 491, so that the third swing arm 47 and the fourth swing arm 48 can stay at certain positions.

[0323] Furthermore, the elastic member 493 is in a compressed state, and the elastic force generated by the elastic member 493 can push the second retaining member 492 toward the rotating end 471 of the third swing arm 47 and the rotating end 481 of the fourth swing arm 48. At this time, the second retaining member 492 cooperates with the first retaining member 491 to press the rotating end 471 of the third swing arm 47 and the rotating end 481 of the fourth swing arm 48, thereby stabilizing the cam structure between the rotating end 471 of the third swing arm 47 and the rotating end 481 of the fourth swing arm 48 and the second retaining member 492 and the first retaining member 491.

[0324] Among them, when the rotating end 471 of the third swing arm 47 and the rotating end 481 of the fourth swing arm 48 rotate relative to the second locking member 492 and the first locking member 491, the relative positions of the multiple third protrusions 4712 and the multiple fifth protrusions 4913 change, and different cam structures can be formed. The relative positions of the multiple fourth protrusions 4713 and the multiple sixth protrusions 4723 change, and different cam structures can be formed.

[0325] Please refer again Figure 47 The two ends of the first transfer shaft 494 are respectively installed in a corresponding set of first and second transfer grooves 3119. The two ends of the second transfer shaft 495 are respectively installed in another set of corresponding first and second transfer grooves. The two ends of the third transfer shaft 496 are respectively installed in another set of corresponding first and second transfer grooves. The first transfer shaft 494, the second transfer shaft 495, and the third transfer shaft 496 can all slide relative to the base 311.

[0326] The first retaining member 491, the rotating end 471 of the third swing arm 47, the rotating end 481 of the fourth swing arm 48, the second retaining member 492, and the fixing plate 497 can all be disposed on the base 311. The rotating end 471 of the third swing arm 47 is rotatably connected to the base 311 via a first adapter shaft 494. The rotating end 481 of the fourth swing arm 48 is rotatably connected to the base 311 via a second adapter shaft 495. The first retaining member 491, the second retaining member 492, and the fixing plate 497 can all be slidably connected to the base 311. One end of the elastic member 493 abuts the fixing plate 497, and the other end abuts the second retaining member 492.

[0327] It is understandable that, combined with Figure 10d As shown, when the third housing 314 is fixedly connected to the middle portion 311 b of the base 311 , the third housing 314 and the base 311 can limit the positioning of the various components of the auxiliary damping member 49 in the Z-axis direction.

[0328] It is understood that the auxiliary damping member 49 of the present application can have various implementation structures. In other embodiments, the auxiliary damping member 49 can also include multiple synchronous gears. The number of synchronous gears is equal to the number of third transfer shafts 496. The multiple synchronous gears are provided in a one-to-one correspondence with the multiple third transfer shafts 496. Each synchronous gear is plugged into a third transfer shaft 496 and rotates relative to the third transfer shaft 496. The rotating end 471 of the third swing arm 47 engages with the rotating end 481 of the fourth swing arm 48 via a synchronous gear. In other embodiments, the positions of the third and fourth swing arms 47 and 48 are indirectly controlled by the position control of the synchronous gears. For example, a cam structure is formed between the second and first retaining members 492 and 491 and the synchronous gears, while no cam structure is formed between the rotating end 471 of the third and fourth swing arms 47 and 481 and the second and first retaining members 492 and 491. In other embodiments, the elastic member 493 can also adopt other structures, such as an elastic rubber block. The above embodiments are exemplary structures of the auxiliary damping member 49 . The auxiliary damping member 49 may also have other implementation structures, which are not strictly limited in this application.

[0329] The above description, in conjunction with the relevant drawings, specifically describes a folding mechanism 301 and an electronic device 100. The folding mechanism 301 can be used in the electronic device 100. The folding mechanism 301 can unfold or fold the flexible screen 2, allowing the electronic device 100 to transition between a flattened state and a closed state. During the unfolding or folding process, the folding mechanism 301 can reduce the risk of pulling or squeezing the flexible screen 2, thereby protecting the flexible screen 2, improving the reliability of the flexible screen 2, and extending the service life of the flexible screen 2.

[0330] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An electronic device (100), characterized in that It comprises a folding mechanism (301), a first shell (302) and a second shell (303), wherein the folding mechanism (301) connects the first shell (302) and the second shell (303); The folding mechanism (301) comprises a main shaft (31), a first fixing frame (32), a second fixing frame (33), a first connecting arm (34), a second connecting arm (35), a first pin shaft (361), a first gear (363), a first matching piece (365), a second matching piece (366), a third matching piece (367) and a first elastic piece (369a); the first fixing frame (32) is fixed to the first shell (302), and the second fixing frame (33) is fixed to the second shell (303); The first connecting arm (34) includes a sliding end (34a) and a rotating end (34b), wherein the sliding end (34a) of the first connecting arm (34) is slidably connected to the first fixing frame (32), and the rotating end (34b) of the first connecting arm (34) is rotatably connected to the main shaft (31); The second connecting arm (35) includes a sliding end (35a) and a rotating end (35b), the sliding end (35a) of the second connecting arm (35) is slidably connected to the second fixing frame (33), and the rotating end (35b) of the second connecting arm (35) is rotatably connected to the main shaft (31); The first pin shaft (361) is rotatably connected to the main shaft (31); the first gear (363) and the third matching piece (367) are fixedly connected to the first pin shaft (361) and are spaced apart from each other; the first gear (363) is engaged with the rotating end (34b) of the first connecting arm (34); the first matching piece (365) and the second matching piece (366) are located between the first gear (363) and the third matching piece (367) and are both slidably connected to the first pin shaft (361); the first matching piece (365) and the first gear (363) form a cam structure; the second matching piece (366) and the third matching piece (367) form a cam structure; one end of the first elastic piece (369a) abuts against the first matching piece (365) and the other end abuts against the second matching piece (366); the first elastic piece (369a) is in a compressed state; During the folding or flattening process of the electronic device (100), the first mating piece (365) and the second mating piece (366) slide relative to the first pin (361), and the sliding directions of the first mating piece (365) and the second mating piece (366) are opposite; The folding mechanism (301) further includes a second pin shaft (362), a second gear (364), a fourth matching member (368), and a second elastic member (369b); The second pin shaft (362) is rotatably connected to the main shaft (31) and is located between the first pin shaft (361) and the rotating end (35b) of the second connecting arm (35). The first matching piece (365) and the second matching piece (366) are also slidably connected to the second pin shaft (362). The second gear (364) and the fourth matching piece (368) are fixedly connected to the second pin shaft (362) and are spaced apart from each other. The second gear (364) is meshed with the first gear (363) and the rotating end (35b) of the second connecting arm (35). The second gear (364) is meshed with the first gear (363) and the rotating end (35b) of the second connecting arm (35). ) is located on a side of the first matching piece (365) away from the second matching piece (366), the second gear (364) and the first matching piece (365) form a cam structure, the fourth matching piece (368) is located on a side of the second matching piece (366) away from the first matching piece (365), the fourth matching piece (368) and the second matching piece (366) form a cam structure, one end of the second elastic piece (369b) abuts against the first matching piece (365), and the other end abuts against the second matching piece (366), and the second elastic piece (369b) is in a compressed state; The folding mechanism (301) further includes a first transmission arm (376) and a first connecting rod (377); The first transmission arm (376) is rotatably connected to the main shaft (31) and slidably connected to the main shaft (31). The first transmission arm (376) is connected to the rotating end (34b) of the first connecting arm (34) through a spiral substructure. One end of the first connecting rod (377) is rotatably connected to the first transmission arm (376), and the other end is rotatably connected to the first fixing frame (32). Wherein, the folding mechanism (301) further includes a sliding block (375) and a first screw rod (371); The sliding block (375) is slidably connected to the main shaft (31), the first transmission arm (376) is rotatably connected to the sliding block (375), and the sliding block (375) has a first protrusion (3756); The first spiral rod (371) is rotatably connected to the main shaft (31), one end of the first spiral rod (371) is fixed to the rotating end (34b) of the first connecting arm (34), the first spiral rod (371) is provided with a first spiral groove (3714), the first spiral groove (3714) extends spirally along the extension direction of the main shaft (31), and at least a portion of the first protrusion (3756) is slidably installed in the first spiral groove (3714).

2. The electronic device (100) according to claim 1, characterized in that The second matching member (366) includes a second protrusion (3664), and the third matching member (367) includes a third protrusion (3674); The second mating piece (366) and the third mating piece (367) form a cam structure, including: the second mating piece (366) and the third mating piece (367) form a cam structure through the second protrusion (3664) and the third protrusion (3674).

3. The electronic device (100) according to claim 1, characterized in that During the folding or flattening process of the electronic device (100), the rotating end (34b) of the first connecting arm (34), the first gear (363), the third matching member (367), and the first pin (361) all rotate relative to the main shaft (31).

4. The electronic device (100) according to claim 3, characterized in that The third matching piece (367) is provided with a third pin shaft hole (3673), and the third pin shaft hole (3673) includes a first wall (3673a) and a second wall (3673b) arranged opposite to each other, and a third wall (3673c) and a fourth wall (3673d) arranged opposite to each other, the third wall (3673c) and the fourth wall (3673d) being connected between the first wall (3673a) and the second wall (3673b), the first wall (3673a) and the second wall (3673b) being both planes, and the third wall (3673c) and the fourth wall (3673d) being both arcuate surfaces; The first pin shaft (361) is inserted into the third pin shaft hole (3673), and a portion of the surface of the first pin shaft (361) cooperates with the first wall (3673a), the second wall (3673b), the third wall (3673c) and the fourth wall (3673d) of the third pin shaft hole (3673).

5. The electronic device (100) according to any one of claims 1 to 4, characterized in that The main shaft (31) includes a base (311) and a first housing (312); the base (311) is provided with a first rotating shaft groove (3116) and a second rotating shaft groove (3117) arranged opposite to each other; one end of the first pin shaft (361) is rotatably connected to the first rotating shaft groove (3116), and the other end is rotatably connected to the second rotating shaft groove (3117); The first housing (312) and the base (311) are arranged to form an accommodating space (312a), and the rotating end (34b) of the first connecting arm (34), the first pin shaft (361), the first gear (363), the first matching piece (365), the second matching piece (366), the third matching piece (367) and the first elastic piece (369a) are arranged in the accommodating space (312a).

6. The electronic device (100) according to claim 5, characterized in that The first pin shaft (361) includes a first limiting flange (3612), the first gear (363) is abutted against the first limiting flange (3612), the first limiting flange (3612) is abutted against the first wall surface (310a) of the base (311), the first wall surface (310a) is connected to the groove wall of the first rotating shaft groove (3116), and the third matching piece (367) is abutted against the second wall surface (310b) of the base (311), and the second wall surface (310b) is connected to the groove wall of the second rotating shaft groove (3117).

7. The electronic device (100) according to claim 5, characterized in that The folding mechanism (301) further includes a fixing member (50), wherein the fixing member (50) is fixedly connected between the base (311) and the first housing (312), and the fixing member (50) is provided with a first limiting hole (51), and at least a portion of the first pin shaft (361) is inserted into the first limiting hole (51) and rotates relative to the first limiting hole (51).

8. The electronic device (100) according to any one of claims 1 to 4, characterized in that The folding mechanism (301) further includes a second transmission arm (378) and a second connecting rod (379); The second transmission arm (378) is rotatably connected to the main shaft (31) and slidably connected to the main shaft (31). The second transmission arm (378) is connected to the rotating end (35b) of the second connecting arm (35) through a spiral substructure. One end of the second connecting rod (379) is rotatably connected to the second transmission arm (378), and the other end is rotatably connected to the second fixed frame (33).

9. The electronic device (100) according to claim 8, characterized in that The folding mechanism (301) further includes a second screw rod (372); The sliding block (375) has a second convex portion (3757), and the first convex portion (3756) and the second convex portion (3757) of the sliding block (375) are arranged in opposite directions; The second spiral rod (372) is rotatably connected to the main shaft (31), one end of the second spiral rod (372) is fixed to the rotating end (35b) of the second connecting arm (35), and the second spiral rod (372) is provided with a second spiral groove (3724), the second spiral groove (3724) extends spirally along the extension direction of the main shaft (31), and at least a portion of the second protrusion (3757) is slidably connected in the second spiral groove (3724).

10. The electronic device (100) according to claim 8, characterized in that The folding mechanism (301) further includes a first swing arm (41) and a second swing arm (42); The first swing arm (41) includes a rotating end (411) and a sliding end (412), wherein the rotating end (411) of the first swing arm (41) is rotatably connected to the main shaft (31), and the sliding end (412) of the first swing arm (41) is slidably connected to the first fixed frame (32); the second swing arm (42) includes a rotating end (421) and a sliding end (422), wherein the rotating end (411) of the second swing arm (42) is rotatably connected to the main shaft (31), and the sliding end (422) of the second swing arm (42) is slidably connected to the second fixed frame (33).

11. The electronic device (100) according to claim 10, characterized in that The folding mechanism (301) further includes a first support plate (43) and a second support plate (44); The first support plate (43) is slidably and rotatably connected to the sliding end (412) of the first swing arm (41), and the first support plate (43) is rotatably connected to the first fixed frame (32); the second support plate (44) is slidably and rotatably connected to the sliding end (422) of the second swing arm (42), and the second support plate (44) is rotatably connected to the second fixed frame (33); When the electronic device (100) is in a flattened state, the first support plate (43) and the second support plate (44) are respectively located on both sides of the main shaft (31); when the electronic device (100) is in a closed state, the first support plate (43) and the second support plate (44) are arranged opposite to each other.

12. The electronic device (100) according to claim 11, characterized in that The folding mechanism (301) further comprises a third fixing frame (45), a fourth fixing frame (46), a third swing arm (47), a fourth swing arm (48), a second locking member (492), a plurality of elastic members (493) and a fixing plate (497); the third fixing frame (45) is fixed to the first shell (302), and the fourth fixing frame (46) is fixed to the second shell (303); The sliding end (472) of the third swing arm (47) is slidably connected to the third fixed frame (45), and the rotating end (471) of the third swing arm (47) is rotatably connected to the main shaft (31). The sliding end (482) of the fourth swing arm (48) is slidably connected to the fourth fixed frame (46), and the rotating end (481) of the fourth swing arm (48) is rotatably connected to the main shaft (31). The second locking member (492) is located on one side of the rotating end (471) of the third swing arm (47) and the rotating end (481) of the fourth swing arm (48); the second locking member (492) is slidably connected to the main shaft (31) and forms a cam structure with the rotating end (471) of the third swing arm (47) and the rotating end (481) of the fourth swing arm (48); the fixing plate (497) is located on the side of the second locking member (492) away from the rotating end (471) of the third swing arm (47) and the rotating end (481) of the fourth swing arm (48); the fixing plate (497) is slidably connected to the main shaft (31); One end of the plurality of elastic members (493) abuts against the second locking member (492), and the other end abuts against the fixing plate (497), and the elastic members (493) are in a compressed state.

13. The electronic device (100) according to claim 12, characterized in that The folding mechanism (301) further comprises a first latching member (491), a first transfer shaft (494) and a second transfer shaft (495); the rotating end (471) of the third swing arm (47) and the rotating end (481) of the fourth swing arm (48) are located between the first latching member (491) and the second latching member (492); the first latching member (491) and the rotating end (471) of the third swing arm (47) and the rotating end (481) of the fourth swing arm (48) all form a cam structure; The first clamping member (491), the first transfer shaft (494) and the second transfer shaft (495) are all slidably connected to the main shaft (31); the first transfer shaft (494) passes through the first clamping member (491), the rotating end (471) of the third swing arm (47), the second clamping member (492), one of the elastic members (493) and the fixing plate (497) in sequence; the first clamping member (491) and the fixing plate (497) are fixed to the first transfer shaft (494); the rotating end (471) of the third swing arm (47) and the second clamping member (492) are slidably connected to the first transfer shaft (494); The second transfer shaft (495) passes through the first retaining member (491), the rotating end (481) of the fourth swing arm (48), the second retaining member (492), one of the elastic members (493) and the fixed plate (497) in sequence; the first retaining member (491) and the fixed plate (497) are also fixed to the second transfer shaft (495); the rotating end (481) of the fourth swing arm (48) and the second retaining member (492) are slidably connected to the second transfer shaft (495).

14. A folding mechanism (301), characterized in that: It comprises a main shaft (31), a first fixing frame (32), a second fixing frame (33), a first connecting arm (34), a second connecting arm (35), a first pin shaft (361), a first gear (363), a first matching piece (365), a second matching piece (366), a third matching piece (367) and a first elastic piece (369a); The first connecting arm (34) includes a sliding end (34a) and a rotating end (34b), wherein the sliding end (34a) of the first connecting arm (34) is slidably connected to the first fixing frame (32), and the rotating end (34b) of the first connecting arm (34) is rotatably connected to the main shaft (31). The second connecting arm (35) includes a sliding end (35a) and a rotating end (35b), the sliding end (35a) of the second connecting arm (35) is slidably connected to the second fixing frame (33), and the rotating end (35b) of the second connecting arm (35) is rotatably connected to the main shaft (31); The first pin shaft (361) is rotatably connected to the main shaft (31); the first gear (363) and the third matching piece (367) are fixedly connected to the first pin shaft (361) and are spaced apart from each other; the first gear (363) is engaged with the rotating end (34b) of the first connecting arm (34); the first matching piece (365) and the second matching piece (366) are located between the first gear (363) and the third matching piece (367) and are both slidably connected to the first pin shaft (361); the first matching piece (365) and the first gear (363) form a cam structure; the second matching piece (366) and the third matching piece (367) form a cam structure; one end of the first elastic piece (369a) abuts against the first matching piece (365) and the other end abuts against the second matching piece (366); the first elastic piece (369a) is in a compressed state; During the folding or flattening process of the folding mechanism (301), the first matching member (365) and the second matching member (366) slide relative to the first pin shaft (361), and the sliding directions of the first matching member (365) and the second matching member (366) are opposite; The folding mechanism (301) further includes a second pin shaft (362), a second gear (364), a fourth matching member (368), and a second elastic member (369b); The second pin shaft (362) is rotatably connected to the main shaft (31) and is located between the first pin shaft (361) and the rotating end (35b) of the second connecting arm (35). The first matching piece (365) and the second matching piece (366) are also slidably connected to the second pin shaft (362). The second gear (364) and the fourth matching piece (368) are fixedly connected to the second pin shaft (362) and are spaced apart from each other. The second gear (364) is meshed with the first gear (363) and the rotating end (35b) of the second connecting arm (35). The second gear (364) is meshed with the first gear (363) and the rotating end (35b) of the second connecting arm (35). ) is located on a side of the first matching piece (365) away from the second matching piece (366), the second gear (364) and the first matching piece (365) form a cam structure, the fourth matching piece (368) is located on a side of the second matching piece (366) away from the first matching piece (365), the fourth matching piece (368) and the second matching piece (366) form a cam structure, one end of the second elastic piece (369b) abuts against the first matching piece (365), and the other end abuts against the second matching piece (366), and the second elastic piece (369b) is in a compressed state; The folding mechanism (301) further includes a first transmission arm (376) and a first connecting rod (377); The first transmission arm (376) is rotatably connected to the main shaft (31) and slidably connected to the main shaft (31). The first transmission arm (376) is connected to the rotating end (34b) of the first connecting arm (34) through a spiral substructure. One end of the first connecting rod (377) is rotatably connected to the first transmission arm (376), and the other end is rotatably connected to the first fixing frame (32). Wherein, the folding mechanism (301) further includes a sliding block (375) and a first screw rod (371); The sliding block (375) is slidably connected to the main shaft (31), the first transmission arm (376) is rotatably connected to the sliding block (375), and the sliding block (375) has a first protrusion (3756); The first spiral rod (371) is rotatably connected to the main shaft (31), one end of the first spiral rod (371) is fixed to the rotating end (34b) of the first connecting arm (34), the first spiral rod (371) is provided with a first spiral groove (3714), the first spiral groove (3714) extends spirally along the extension direction of the main shaft (31), and at least a portion of the first protrusion (3756) is slidably installed in the first spiral groove (3714).

15. The folding mechanism (301) according to claim 14, characterized in that: The second matching member (366) includes a second protrusion (3664), and the third matching member (367) includes a third protrusion (3674); The second mating piece (366) and the third mating piece (367) form a cam structure, including: the second mating piece (366) and the third mating piece (367) form a cam structure through the second protrusion (3664) and the third protrusion (3674).

16. The folding mechanism (301) according to claim 14, characterized in that: During the folding or flattening process of the folding mechanism (301), the rotating end (34b) of the first connecting arm (34), the first gear (363), the third matching member (367), and the first pin (361) rotate relative to the main shaft (31).

17. The folding mechanism (301) according to claim 16, characterized in that: The third matching piece (367) is provided with a third pin shaft hole (3673), and the third pin shaft hole (3673) includes a first wall (3673a) and a second wall (3673b) arranged opposite to each other, and a third wall (3673c) and a fourth wall (3673d) arranged opposite to each other, the third wall (3673c) and the fourth wall (3673d) being connected between the first wall (3673a) and the second wall (3673b), the first wall (3673a) and the second wall (3673b) being both planes, and the third wall (3673c) and the fourth wall (3673d) being both arcuate surfaces; The first pin shaft (361) is inserted into the third pin shaft hole (3673), and a portion of the surface of the first pin shaft (361) cooperates with the first wall (3673a), the second wall (3673b), the third wall (3673c) and the fourth wall (3673d) of the third pin shaft hole (3673).

18. The folding mechanism (301) according to any one of claims 14 to 17, characterized in that: The main shaft (31) includes a base (311) and a first housing (312); the base (311) is provided with a first rotating shaft groove (3116) and a second rotating shaft groove (3117) arranged opposite to each other; one end of the first pin shaft (361) is rotatably connected to the first rotating shaft groove (3116), and the other end is rotatably connected to the second rotating shaft groove (3117); The first housing (312) and the base (311) are arranged to form an accommodating space (312a), and the rotating end (34b) of the first connecting arm (34), the first pin shaft (361), the first gear (363), the first matching piece (365), the second matching piece (366), the third matching piece (367) and the first elastic piece (369a) are arranged in the accommodating space (312a).

19. The folding mechanism (301) according to claim 18, characterized in that: The first pin shaft (361) includes a first limiting flange (3612), the first gear (363) is abutted against the first limiting flange (3612), the first limiting flange (3612) is abutted against the first wall surface (310a) of the base (311), the first wall surface (310a) is connected to the groove wall of the first rotating shaft groove (3116), and the third matching piece (367) is abutted against the second wall surface (310b) of the base (311), and the second wall surface (310b) is connected to the groove wall of the second rotating shaft groove (3117).

20. The folding mechanism (301) according to claim 18, characterized in that: The folding mechanism (301) further includes a fixing member (50), wherein the fixing member (50) is fixedly connected between the base (311) and the first housing (312), and the fixing member (50) is provided with a first limiting hole (51), and at least a portion of the first pin shaft (361) is inserted into the first limiting hole (51) and rotates relative to the first limiting hole (51).

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