Rotating shaft assembly and folding electronic equipment

Abstract

The invention discloses a rotating shaft assembly and folding electronic equipment, and belongs to the technical field of electronic equipment. Through the contact between the smooth contact surface and the door plate, the overlap amount is reduced, the arranged swing rod part converts the movement of the rotating shaft in the width direction in the prior art into the movement of the rotating shaft in the length direction, the space of the electronic equipment in the width direction is greatly saved, and more possibilities are provided for the layout of other parts. Meanwhile, a sliding main swing arm does not need to be arranged in the prior art, the problem caused by insufficient lap joint amount is avoided, the rotating shaft structure is simplified, and the swing rod part and the swing arm part are coupled through the linkage structure so that the swing rod part and the swing arm part can jointly form a framework. Through the coupling design, the two parts are matched with each other and work cooperatively in the moving process, and jointly bear the acting force generated when the door plate moves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular to a hinge assembly and a foldable electronic device. BACKGROUND

[0002] With the development of technology, foldable screens have gradually become an important choice for users to work and entertain. With the trend of lightweight design becoming mainstream, the spatial layout inside electronic devices has become increasingly critical. On the one hand, the demand for battery space is gradually increasing to meet the longer battery life requirements of mobile phones; on the other hand, the overall design space is further compressed, which makes the layout of each component need to be more compact and efficient.

[0003] In the existing hinge design of electronic devices, there are many problems. First, the existing hinge movement skeleton is generally composed of a main swing arm and an auxiliary swing arm (see Figure 1 ). The main swing arm 2 needs to slide on the door plate 1 to realize movement when the hinge rotates. The main swing arm 2 and the door plate 1 adopt face-to-face cooperation, and the face-to-face cooperation needs sufficient overlap to ensure the smoothness of movement. Therefore, the initial overlap between the main swing arm 2 and the door plate 1 is a key factor to ensure smooth movement. With the compression of the hinge design space, the overlap of the swing arm gradually decreases. In order to realize lightweight design, the space of the hinge is often compressed, which requires reducing the overlap. When the overlap of the main swing arm 2 is reduced, the insufficient overlap causes the contact between the main swing arm 2 and the door plate 1 to be not close enough during the sliding process, the friction increases, which will cause the movement to be not smooth and prone to jamming phenomenon. Moreover, reducing the overlap will also affect the overall stability of the hinge. SUMMARY

[0004] The present application provides a hinge assembly and a foldable electronic device, which can not only reduce the occupied space, but also ensure the stability of the swing.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a hinge assembly is provided for a foldable electronic device including a first body and a second body. The hinge assembly includes a base and two door plates swingably mounted on two sides of the base, respectively. The first body and the second body are connected to the two door plates, respectively. The hinge assembly further includes a guide portion extending along a length direction of the base, a sliding portion slidably mounted on the guide portion, a pair of swing lever portions, first ends of the two swing lever portions in each pair being connected to the sliding portion in multiple degrees of freedom, second ends of the two swing lever portions in each pair being connected to the two door plates in multiple degrees of freedom, the two swing lever portions in each pair applying a pushing force in a first direction to the sliding portion during folding of the two door plates, a pair of swing arm structures, first ends of the two swing arm structures in each pair being rotatably arranged on the base along the length direction of the base, second ends of the two swing arm structures in each pair being slidably connected to the two door plates, respectively, wherein the second end of the swing arm structure is provided with a smooth contact surface and contacts the door plate through the smooth contact surface, a linkage structure arranged between the sliding portion and the first ends of the swing arm structures, for converting the pushing force in the first direction of the sliding portion into a rotating force of the swing arm structure during folding of the two door plates, and for converting the rotating force of the swing arm structure into a pushing force in a second direction of the sliding portion during unfolding of the two door plates, wherein the first direction is a direction from the sliding portion to the swing arm structure, and the second direction is opposite to the first direction.

[0007] The swing arm structure in the embodiment of the present application contacts the door plate through the smooth contact surface, which reduces the overlap amount. The swing lever portion converts the movement in the width direction of the hinge in the prior art into movement in the length direction of the hinge, greatly saving the space in the width direction of the electronic device and providing more possibilities for the layout of other components. At the same time, the main swing arm for sliding in the prior art is not needed, which avoids the problems caused by insufficient overlap amount, simplifies the hinge structure, and couples the swing lever portion and the swing arm portion through the linkage structure, so that they jointly form a framework. The coupling design enables the two components to cooperate with each other and work together to jointly bear the force during movement of the door plate.

[0008] In an embodiment, the linkage structure includes a first matching surface and a second matching surface. The first matching surface is arranged at one end of the sliding portion close to the swing arm portion, and the second matching surface is arranged at one end of the swing arm portion close to the sliding portion. The first matching surface and the second matching surface are in abutting cooperation. At least one of the first matching surface and the second matching surface is a slope surface, which gradually inclines to the direction indicated by the first direction from the outside of the hinge assembly to the inside of the hinge assembly. Since the slope surface inclines from the outside to the inside of the hinge assembly, it can utilize the space inside the electronic device to some extent, so that the linkage structure can realize force transmission and conversion without occupying too much additional space.

[0009] In one embodiment, the first and second mating surfaces are both helical slopes, and the two helical slopes are adapted to each other. Compared with common slopes, the helical slopes can continuously convert force throughout the movement process, rather than only acting at specific positions or angles. Continuous force transmission makes the movement of the door panel more stable, without sudden jamming or force interruption. The mutual cooperation of the helical slopes makes the connection between the sliding part and the swing arm part more compact and stable.

[0010] In one embodiment, the linkage structure comprises a first protrusion and a first recess, the first protrusion is arranged at one end of the sliding part close to the swing arm part, the first recess is arranged at one end of the swing arm part close to the sliding part, the first protrusion and the first recess are adapted to each other, the first mating surface is arranged on the first protrusion, and the second mating surface is arranged on the first recess.

[0011] In one embodiment, the guide part comprises two guide rods arranged side by side, the guide rods extend along the length direction of the base, the sliding part comprises a sliding block, the sliding block is internally provided with two first through holes, the two guide rods are respectively arranged in the two first through holes, the first protrusion is arranged along the circumferential direction of the first through hole, and the axis of the helical slope coincides with the axis of the guide rod. The guide part is composed of two guide rods arranged side by side and extending along the length direction of the base, which provides a clear path for the movement of the sliding part.

[0012] In one embodiment, the first end of the swing arm structure is provided with a rotating main body, the rotating main body is provided with a second through hole, the rotating main body is rotatably sleeved on the guide rod through the second through hole, and the first recess is arranged on the rotating main body and arranged along the circumferential direction of the second through hole. The first end of the swing arm structure is provided with the rotating main body, and the second through hole on the rotating main body is rotatably sleeved on the guide rod, which provides a clear rotation axis for the swing arm structure. The swing arm structure can stably rotate around the guide rod during movement, without shaking or deviating from the predetermined rotation track.

[0013] In one embodiment, the swing arm structure further comprises an arm body, the rotating main body is arranged at the first end of the arm body, the door panel is provided with a guide groove extending perpendicular to the axis of the rotating main body, the second end of the arm body is provided with a guide block, the guide block is arranged in the guide groove, and the smooth contact surface is arranged on the guide block. The sliding of the guide block in the guide groove can provide clear guidance for the movement of the swing arm structure, ensuring that the swing arm structure can move according to the predetermined track, thereby ensuring that the opening and closing action of the door panel is accurate. The cooperation of the guide block and the guide groove makes the movement of the swing arm structure and the door panel more coordinated.

[0014] In one embodiment, a groove is arranged on at least one side wall of the guide slot and extends along the length direction of the guide slot, and a guide structure is arranged on at least one side wall of the guide block and movably installed in the groove, and the smooth contact surface is arranged on the guide structure and in contact with the groove wall. The guide structure is movably installed in the groove, which provides additional guidance and limitation for the movement of the guide block. The guide block can only move along the length direction of the groove, further improving the accuracy of movement. At the same time, the smooth contact surface arranged on the guide structure and in contact with the groove wall reduces the frictional resistance, making the sliding of the guide block more smooth. The opening and closing process of the door plate is more stable.

[0015] In one embodiment, the pivot shaft assembly further comprises a first damping part arranged on the base and used for applying an elastic force in a first direction to the sliding block. Through the action of the first damping part, the door plate can be unfolded at a relatively stable speed, improving the safety and comfort of the use of the equipment. With the damping effect, the user can better control the speed and intensity of unfolding when unfolding the door plate. This makes the operation more accurate, and the user can adjust the unfolding degree according to the actual needs to meet the needs of different use scenarios.

[0016] In one embodiment, the base is provided with a mounting seat, the guide rods are mounted on the mounting seat, and the first damping part comprises two first springs, the two first springs are respectively sleeved on the two guide rods, the first end of the first spring abuts against the mounting seat, and the second end of the first spring abuts against the end of the sliding block away from the swing arm part. The two first springs are respectively sleeved on the two guide rods, so that the force of the spring can be directly transmitted to the sliding block along the direction of the guide rod, ensuring that the force transmission path is clear and stable.

[0017] In one embodiment, the swing arm part comprises two swing arm bodies, the swing arm structures are in multiple pairs, the two swing arm structures in each pair are arranged on the two swing arm bodies respectively, and the linkage structure is arranged between the first end of the two swing arm structures in the pair close to the sliding part and the sliding part. The multiple pairs of swing arm structures can jointly bear the force generated by the door plate during opening and closing, improving the carrying capacity of the entire pivot shaft assembly. Whether the electronic device is in an open state or a closed state, the multiple pairs of swing arm structures can provide more reliable support for the door plate to prevent the door plate from shaking or deforming.

[0018] In one embodiment, the pivot shaft assembly further comprises a second damping part arranged between the two adjacent pairs of swing arm structures, and the second damping part is used for providing resistance to the rotation of the swing arm structure. The second damping part can limit the excessive and rapid rotation of the swing arm structure, avoiding damage to the pivot shaft assembly and the electronic device due to excessive opening and closing.

[0019] In one embodiment, the second damping part comprises two second springs arranged side by side, the two second springs are sleeved on the two guide rods respectively, and the second springs can be compressed by the two adjacent pairs of swing arm structures. The rotation of the swing arm structures is limited by the elastic force of the springs, the space around the guide rods is fully utilized, a compact structure is realized, no extra space is occupied, the layout of the rotating shaft assembly in the electronic device is more reasonable, and the thinning and miniaturization of the electronic device are facilitated.

[0020] In one embodiment, the second damping part further comprises two linkage blocks, the two linkage blocks abut against the two adjacent swing arm structures respectively, the two ends of the second springs abut against the linkage blocks respectively, the linkage blocks are provided with third and fourth through holes, the two guide rods pass through the third and fourth through holes respectively, the swing arm structure is provided with a first spiral guide surface at one end close to the linkage block, the linkage block is provided with a second spiral guide surface at one end close to the swing arm structure, and the first and second spiral guide surfaces abut against each other. The spiral guide surfaces make the generation of damping force more smooth and continuous, and improve the stability and reliability of the damping effect.

[0021] In one embodiment, the swing arm structure is provided with a second protrusion, the linkage block is provided with a second recess, the second protrusion is matched with the second recess, the first spiral guide surface is arranged on the second protrusion, and the second spiral guide surface is arranged on the second recess. The second protrusion is completely clamped in the second recess, and a relatively stable locking state can be formed.

[0022] In one embodiment, the swing rod part comprises a rod body and a spherical protrusion arranged at two ends of the rod body, the first ends of the two swing rod parts in each pair are connected with the sliding part through a spherical hinge, and the second ends of the two swing rod parts in each pair are connected with the two door plates through spherical hinges. Through the spherical hinge connection mode, the first ends of the two swing rod parts in each pair and the sliding part and the second ends and the door plates can be flexibly rotated in multiple directions.

[0023] In one embodiment, the first end of the swing rod part is closer to the swing arm structure than the second end of the swing rod part.

[0024] The second aspect of the present application provides a foldable electronic device, which comprises a rotating shaft assembly, a first body and a second body mounted on the rotating shaft assembly, the rotating shaft assembly is the rotating shaft assembly described above, and the first body and the second body are connected with the two door plates respectively.

[0025] Through the above technical solution, since the foldable electronic device comprises the rotating shaft assembly described above, at least all the beneficial effects of the rotating shaft assembly are possessed, which will not be described herein. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a rotating shaft device in the related art;

[0027] Figure 2 is a structural schematic view of a hinge assembly provided by an embodiment of the present application when the door panels are in an unfolded state;

[0028] Figure 3 is a structural schematic view of a hinge assembly provided by an embodiment of the present application when the door panels are in an unfolded state and all the door panels are hidden away;

[0029] Figure 4 is a structural schematic view of a sliding part provided by an embodiment of the present application;

[0030] Figure 5 is a structural schematic view of a swing arm part cooperating with one door panel provided by an embodiment of the present application;

[0031] Figure 6 is a simplified schematic view of a first cooperating surface cooperating with a second cooperating surface provided by an embodiment of the present application;

[0032] Figure 7 is a structural schematic view of a hinge assembly provided by an embodiment of the present application when the door panels are in an unfolded state and one door panel is hidden away;

[0033] Figure 8 is a structural schematic view of a hinge assembly provided by an embodiment of the present application when the door panels are in a folded state;

[0034] Figure 9 is a structural schematic view of a hinge assembly provided by an embodiment of the present application when the door panels are in a folded state and one door panel is hidden away;

[0035] Figure 10 is a structural schematic view of a hinge assembly provided by an embodiment of the present application when the door panels are in a folded state and all the door panels are hidden away;

[0036] Figure 11 is a structural schematic view of a second damping part provided by an embodiment of the present application;

[0037] Figure 12 is a simplified schematic view of a first helical guide surface cooperating with a second helical guide surface provided by an embodiment of the present application;

[0038] Figure 13 is a simplified schematic view of a foldable electronic device provided by an embodiment of the present application;

[0039] In the drawings, the meanings of the respective reference numerals are as follows:

[0040] 1, door panel; 2, main swing arm;

[0041] 10, first body; 11, second body; 12, hinge assembly; 13, guide assembly;

[0042] 20, base; 21, door panel; 22, guide slot; 23, groove;

[0043] 30, guide portion; 31, guide rod;

[0044] 40, sliding portion; 41, sliding block; 42, first through hole;

[0045] 50, swing lever portion; 51, lever body; 52, spherical protrusion;

[0046] 60, swing arm portion; 61, swing arm structure; 62, round smooth contact surface; 63, rotating main body; 64, second through hole; 65, arm body; 66, guide block; 67, guide structure; 68, swing arm main body; 69, second protrusion;

[0047] 70, linkage structure; 71, first matching surface; 72, second matching surface; 73, first protrusion; 74, first recess

[0048] 80, first damping portion; 81, first spring;

[0049] 90, second damping portion; 91, second spring; 92, linkage block; 93, first helical guide surface; 94, second helical guide surface; 95, second recess. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0051] It should be understood that in the description of the present application, it is to be understood that the terms "length", "width", "thickness", "top", "bottom", "inner", "outer", "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] The terms "first", "second", "third", "fourth" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. For example, the first push portion and the second push portion are only used to distinguish different push portions, and do not limit the order, the first push portion can also be named as the second push portion, and the second push portion can also be named as the first push portion, without departing from the scope of various described embodiments. And the terms "first", "second", "third", "fourth" and the like do not limit the features indicated to be different.

[0053] In the embodiments of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", and the like should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In the embodiments of the present application, "and / or" is only to describe the association relationship of the associated objects, which means that there can be three kinds of relationships; for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0055] It should be noted that in the embodiments of the present application, the words "in an embodiment", "exemplarily", "for example" and the like are used to represent as an example, illustration or explanation. Any embodiment or design scheme described as "in an embodiment", "exemplarily", "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "in an embodiment", "exemplarily", "for example" and the like is intended to present the relevant concept in a specific way.

[0056] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with the drawings and embodiments.

[0057] There are many problems in the related art electronic device rotation shaft design. First, the existing rotation shaft movement skeleton is generally composed of a main swing arm and a sub swing arm. The main swing arm 2 needs to slide on the door panel 1 to realize movement when the rotation shaft rotates. The main swing arm 2 and the door panel 1 adopt face-to-face cooperation (please refer to Figure 1 ). Face-to-face cooperation needs sufficient overlap to ensure smooth movement, so the initial overlap of the main swing arm and the door panel is a key factor to ensure smooth movement. As the rotation shaft design space is compressed, the overlap of the swing arm gradually decreases. In order to realize thinning, the space of the rotation shaft is often compressed, which requires reducing the overlap. When the overlap of the main swing arm is reduced, the insufficient overlap causes the contact between the main swing arm and the door panel to be not close enough during sliding, the friction increases, which will cause the movement to be not smooth, and the phenomenon of jamming is easy to occur. Moreover, reducing the overlap will also affect the overall stability of the rotation shaft.

[0058] The embodiment of the present application provides a hinge assembly, which is used for a foldable electronic device. The foldable electronic device comprises a first body and a second body, and the two parts are connected together through the hinge assembly. The device can be folded in a specific case, so as to balance portability and functionality in different use scenarios. For example, when the device needs to be carried out, it can be folded to reduce the occupied space and facilitate being put into a pocket or bag; and when the device is used, it can be unfolded to obtain a larger screen display area or operation space. From the functional point of view, the foldable electronic device generally has similar functions to traditional electronic devices, such as information processing, communication and entertainment. However, due to the unique folding design, special optimization may be made in software and hardware to adapt to different folding states and use requirements. For example, the screen may need to have a foldable feature and maintain good display effect in the folded and unfolded states; the operating system may need to adaptively adjust to different screen layouts to provide better user experience. The foldable electronic device can be a foldable mobile phone, a foldable tablet computer or a foldable notebook computer.

[0059] Please refer to Figure 2 As shown in the figure, the hinge assembly comprises a base 20 and two door plates 21 respectively swingably mounted on both sides of the base 20, and the first body and the second body are connected with the two door plates 21 respectively.

[0060] Among them, the door plate 21 is an important intermediate component connecting the body of the electronic device and the hinge assembly. The door plate 21 swings under the action of the hinge assembly, so as to realize the folding and unfolding actions of the foldable electronic device. When the device is in the folded state, the two door plates 21 are close to each other; when the device is unfolded, the two door plates 21 are gradually opened. In this process, the door plate 21 bears the body and provides support and fixation for the body on one hand; on the other hand, through cooperation with other components of the hinge assembly such as the swing arm part 60, the swing rod part 50 and the linkage structure 70, the stable opening and closing movement of the device is realized.

[0061] Please refer to Figure 2 and Figure 3As shown, the hinge assembly in the embodiment of the present application further comprises a guide portion 30, a sliding portion 40, a pair of swing lever portions 50, a swing arm portion 60 and a linkage structure 70. The guide portion 30 extends along the length direction of the base 20. The sliding portion 40 is slidably mounted on the guide portion 30. The first ends of the two swing lever portions 50 in each pair are in multi-degree-of-freedom rotary connection with the sliding portion 40, and the second ends of the two swing lever portions 50 in each pair are in multi-degree-of-freedom rotary connection with the two door plates 21 respectively. In the process of folding the two door plates 21, the two swing lever portions 50 in each pair apply a pushing force in the first direction to the sliding portion 40. The multi-degree-of-freedom rotary connection can be a spherical hinge connection, a hinge and shaft combination connection, etc. The swing arm portion 60 comprises a pair of swing arm structures 61. The first ends of the two swing arm structures 61 in each pair are rotatably arranged on the base 20 with the length direction of the base 20 as the axis. With the length direction of the base 20 as the axis, it can be one axis or two parallel axes. The second ends of the two swing arm structures 61 in each pair are slidably connected with the two door plates 21 respectively.

[0062] The second end of the swing arm structure 61 is provided with a round and smooth contact surface 62, and the round and smooth contact surface 62 is in contact with the door plate 21. From the perspective of shape, the surface of the round and smooth contact surface 62 presents a smooth shape without obvious corners or abrupt changes, reducing the wear and damage that may be caused by local stress concentration. When the swing arm structure 61 is in contact with the door plate 21, it presents a line-surface cooperation, and the round and smooth contact surface 62 reduces the lap joint amount requirement between the swing arm structure 61 and the door plate 21. In the traditional hinge design, a larger lap joint amount is often required to ensure smooth movement. The round and smooth contact surface 62 realizes relatively smooth contact and movement with a smaller lap joint amount, avoiding problems such as loose contact, increased friction and jamming due to insufficient lap joint amount. On the other hand, the round and smooth contact surface 62 makes the friction smaller when the swing arm structure 61 slides relative to the door plate 21, and the movement is more smooth, improving the stability and reliability of the hinge assembly in use, and ensuring that the door plates 21 of the foldable electronic device can be smoothly opened and closed.

[0063] The linkage structure 70 is arranged between the sliding part 40 and the first end of the swing arm structure 61, and is used to convert the first direction pushing force of the sliding part 40 into the rotating force of the swing arm structure 61 during the folding of the two door panels 21, and to convert the rotating force of the swing arm structure 61 into the second direction pushing force of the sliding part 40 during the unfolding of the two door panels 21. The first direction is the direction from the sliding part 40 to the swing arm part 60, and the second direction is opposite to the first direction. When the two door panels 21 are folded, the swing lever part 50 will apply a first direction pushing force to the sliding part 40. The first direction is the direction from the sliding part 40 to the swing arm part 60. The linkage structure 70 converts the pushing force of the sliding part 40 into the rotating force of the swing arm structure 61 during this process. Specifically, as the door panels 21 are folded, the swing lever part 50 pushes the sliding part 40 to move towards the swing arm part 60. The linkage structure 70 converts the linear motion of the sliding part 40 into the rotation of the swing arm structure 61 around its first end through a specific mechanical structure. For example, the linkage structure 70 can use inclined surface cooperation, gear transmission and the like to convert the linear pushing force of the sliding part 40 into the torque that can make the swing arm structure 61 rotate. In this way, the swing arm structure 61 can rotate accordingly as the door panels 21 are folded, providing support and guidance for the movement of the door panels 21.

[0064] When the two door panels 21 are unfolded, the situation is reversed. The swing arm structure 61 will generate a rotating force, which is converted into the second direction pushing force of the sliding part 40 through the linkage structure 70. The second direction is opposite to the first direction, i.e. the direction from the swing arm part 60 to the sliding part 40. During the unfolding of the door panels 21, the rotation of the swing arm structure 61 will be transmitted to the sliding part 40 through the linkage structure 70, so that the sliding part 40 moves away from the swing arm part 60. Similarly, the linkage structure 70 can convert the rotating force of the swing arm structure 61 into the linear pushing force of the sliding part 40 through appropriate mechanical structures, such as reverse inclined surface cooperation, reverse gear transmission and the like. In this way, the sliding part 40 can move accordingly when the door panels 21 are unfolded, and work with the swing arm structure 61 to ensure the smooth unfolding of the door panels 21.

[0065] The swing arm structure 61 in the embodiment of the present application contacts the door plate 21 through a round smooth contact surface 62, which reduces the overlap amount. In the traditional design, the main swing arm and the door plate 21 adopt face-to-face cooperation, and sufficient overlap amount is needed to ensure smooth movement. However, with the design lightening and thinning, the rotation shaft space is compressed, the swing arm overlap amount is reduced, which leads to the problems of loose contact, increased friction and jamming, and also affects the overall stability of the rotation shaft. The round smooth contact surface 62 can still ensure relatively smooth contact under a small overlap amount, reduce the friction and the possibility of jamming, and meet the needs of compact and efficient internal space layout of electronic equipment. Secondly, the swing lever part 50 set in the present application converts the movement in the width direction of the rotation shaft in the prior art into movement in the length direction of the rotation shaft, greatly saving the space in the width direction of the electronic equipment and providing more possibilities for the layout of other components. At the same time, unlike the prior art, the main swing arm does not need to be set to slide, avoiding the problems caused by insufficient overlap amount, simplifying the structure of the rotation shaft, and coupling the swing lever part 50 and the swing arm part 60 through the linkage structure 70, so that they together form a framework. The coupling design makes the two components cooperate with each other and work together to bear the force when the door plate 21 moves. During the folding and unfolding of the two door plates 21, the linkage structure 70 can convert the force in both directions to ensure the stability of the movement of the door plate 21. The existence of the linkage structure 70 enhances the structural stability of the entire folding assembly, so that it can better resist external forces, prolong the service life of the electronic equipment and improve the product reliability.

[0066] When one door plate 21 starts to move, whether it is to unfold or to fold, the door plate 21 will apply force to the sliding part 40 through the swing lever part 50. Since the sliding part 40 is slidably installed on the guide part 30, it can quickly transmit this force to the entire structure of the sliding part 40. Since the two swing lever parts 50 are connected to the sliding part 40 respectively, the sliding part 40 can evenly distribute the force from one door plate 21 to the other swing lever part 50. In this way, the force is transmitted from one door plate 21 to the other door plate 21 through the sliding part 40, prompting the two door plates 21 to start moving synchronously. The sliding part 40 cooperates with the linkage structure 70 to further enhance the synchronization. During the folding of the two door plates 21, the movement of one door plate 21 pushes the sliding part 40 to move towards the swing arm part 60 through the swing lever part 50. At this time, the linkage structure 70 converts the linear motion of the sliding part 40 into the rotating force of the swing arm structure 61, and this rotating force will act on the swing arm structure 61 connected to the other door plate 21. In this way, the sliding part 40 and the linkage structure 70 work together to ensure that the movement of the two door plates 21 is carried out synchronously. Similarly, during the unfolding process, the linkage structure 70 converts the rotating force of the swing arm structure 61 into the thrust of the sliding part 40, and the sliding part 40 transmits this thrust to the two swing lever parts 50 to realize the synchronous unfolding of the two door plates 21.

[0067] Please refer to Figures 4 to 6As shown, the linkage structure 70 in the embodiments of the present application includes a first mating surface 71 and a second mating surface 72. The first mating surface 71 is arranged at one end of the sliding part 40 close to the swing arm part 60, and the second mating surface 72 is arranged at one end of the swing arm part 60 close to the sliding part 40. The first mating surface 71 and the second mating surface 72 are in abutting cooperation, and at least one of the first mating surface 71 and the second mating surface 72 is a bevel surface that gradually inclines in the direction indicated by the first direction from the outside of the rotating shaft assembly to the inside of the rotating shaft assembly. During the folding process of the door panel 21, when at least one of the first mating surface 71 and the second mating surface 72 is a bevel surface that gradually inclines in the first direction from the outside to the inside of the rotating shaft assembly, the pushing force in the first direction received by the sliding part 40 can be more effectively transmitted to the swing arm part 60 through the action of the bevel surface, and then converted into the rotating force of the swing arm structure 61. The existence of the bevel surface changes the direction of force transmission, decomposes the force generated by the linear motion of the sliding part 40 along the direction of the bevel surface, thereby generating a component force that pushes the swing arm part 60 to rotate. During the unfolding process of the door panel 21, similarly, the rotating force of the swing arm structure 61 is converted into the pushing force in the second direction of the sliding part 40 through the reverse action of the bevel surface, and the inclination direction of the bevel surface ensures that the reverse conversion of the force can also be efficiently performed. Since the bevel surface inclines from the outside to the inside of the rotating shaft assembly, it can to some extent make use of the space inside the electronic device, so that the linkage structure 70 can realize force transmission and conversion without occupying too much additional space. At the same time, it is also helpful to reasonably arrange and combine the linkage structure 70 with other components, thereby improving the utilization rate of the internal space of the electronic device.

[0068] For reference Figures 2 to 4 As shown, the first mating surface 71 and the second mating surface 72 in the embodiments of the present application are both helical bevel surfaces, and the two helical bevel surfaces are adapted to each other. When the first mating surface 71 and the second mating surface 72 are both helical bevel surfaces and adapted to each other, during the folding and unfolding process of the door panel 21, continuous force transmission and conversion can be achieved. Compared with ordinary bevel surfaces, helical bevel surfaces can continuously convert force throughout the entire motion process, rather than only acting at specific positions or angles. Continuous force transmission makes the motion of the door panel 21 more stable and prevents sudden jamming or interruption of force. The mutual cooperation of the helical bevel surfaces makes the connection between the sliding part 40 and the swing arm part 60 more tight and stable. The helical structure itself has a certain self-locking property. When force is transmitted through the helical bevel surface, the friction between the two components will increase with the action of the force, thereby preventing the loosening and displacement of the components. The self-locking property improves the stability and reliability of the rotating shaft assembly, and reduces the possibility of failure and damage caused by loosening of the components. Even in the case of external vibration or impact on the electronic device, the connection of the helical bevel surface can remain stable, ensuring the normal opening and closing of the door panel 21.

[0069] For reference Figures 4 to 6As shown, the linkage structure 70 in the embodiment of the present application includes a first protruding part 73 and a first recessed part 74, the first protruding part 73 is arranged at one end of the sliding part 40 close to the swing arm part 60, the first recessed part 74 is arranged at one end of the swing arm part 60 close to the sliding part 40, the first protruding part 73 and the first recessed part 74 are matched, the first matching surface 71 is arranged on the first protruding part 73, and the second matching surface 72 is arranged on the first recessed part 74. The first protruding part 73 is completely clamped in the first recessed part 74, and a relatively stable locking state can be formed. In one embodiment, in the completely folded state, the first protruding part 73 is completely clamped in the first recessed part 74, forming a locking state, which can ensure the structural integrity of the equipment during carrying or placing in a backpack, pocket or other environment. The close combination of the first protruding part 73 and the first recessed part 74 makes the force transmission path more clear and stable. In the subsequent opening and closing operation, the close combination helps the force transmission to be in an accurate state from the beginning, reducing the force transmission deviation caused by the inaccurate initial position.

[0070] Please refer to Figures 7 to 10As shown, the guide part 30 in the embodiment of the present application includes two guide rods 31 arranged side by side, the guide rods 31 extend along the length direction of the base 20, the sliding part 40 includes a sliding block 41, the sliding block 41 is internally provided with two first through holes 42, the two guide rods 31 are respectively arranged in the two first through holes 42, the first protruding part 73 is arranged along the circumference of the first through hole 42, and the axis of the helical slope coincides with the axis of the guide rod 31. The guide part 30 is composed of two guide rods 31 arranged side by side and extending along the length direction of the base 20, which provides a clear path for the movement of the sliding part 40. The sliding block 41 of the sliding part 40 is internally provided with two first through holes 42, and the guide rods 31 are respectively arranged in the two first through holes 42, so that the sliding block 41 can only slide along the direction of the guide rod 31, ensuring the accuracy and stability of sliding. During the folding and unfolding of the electronic device, accurate guiding is crucial, which ensures that the movement of each component follows the predetermined trajectory, avoids problems such as jamming and misalignment caused by inaccurate sliding direction, and makes the opening and closing movement of the door plate 21 more smooth. The two guide rods 31 increase the stability of the movement of the sliding part 40. Compared with a single guide rod 31, the two guide rods 31 arranged side by side can better withstand various forces generated by the sliding block 41 during movement, reducing the shaking and tilting of the sliding block 41. At the same time, the first through hole 42 in the sliding block 41 closely matches the guide rod 31, further enhancing the stability of the structure. The first protruding part 73 is arranged along the circumference of the first through hole 42, and the axis of the helical slope coincides with the axis of the guide rod 31. During the sliding of the sliding block 41, the force can be more effectively transmitted through the helical slope on the first protruding part 73. Since the axis of the helical slope coincides with the axis of the guide rod 31, the direction of force transmission is related to the sliding direction of the sliding block 41 and the extension direction of the guide rod 31, which can achieve more efficient force conversion. When the door plate 21 is folded and unfolded, the force can be accurately transmitted from the sliding part 40 to the swing arm part 60, improving the efficiency and accuracy of force transmission and further optimizing the performance of the shaft assembly.

[0071] Please refer to Figure 5As shown, the first end of the swing arm structure 61 in the embodiment of the present application is provided with a rotating main body 63, the rotating main body 63 is provided with a second through hole 64, the rotating main body 63 is rotatably sleeved on the guide rod 31 through the second through hole 64, and a first recess 74 is arranged on the rotating main body 63 and arranged along the circumferential direction of the second through hole 64. The first end of the swing arm structure 61 is provided with the rotating main body 63, and the second through hole 64 on the rotating main body 63 is rotatably sleeved on the guide rod 31, which provides a clear rotation axis for the swing arm structure 61. The swing arm structure 61 can stably rotate around the guide rod 31 during movement, and cannot shake or deviate from the predetermined rotation track. By sleeving the rotating main body 63 on the guide rod 31, the swing arm structure 61 is closely combined with the guide part 30. Not only does it provide support for the swing arm structure 61, but also makes the swing arm structure 61 work better with the guide part 30. During the movement of the device, the guide part 30 can limit and guide the rotation of the swing arm structure 61 through the guide rod 31, and also improves the structural stability of the whole rotating shaft assembly, reduces the possibility of failure and damage caused by looseness or gap between parts. The first recess 74 is arranged on the rotating main body 63 and arranged along the circumferential direction of the second through hole 64. During force transmission, the first recess 74 can be more closely matched with the first protrusion 73 on the sliding part 40. When the sliding part 40 is subjected to force, through the interaction of the first protrusion 73 and the first recess 74, the force can be more directly transmitted to the rotating main body 63 of the swing arm structure 61, thereby pushing the swing arm structure 61 to rotate.

[0072] Please refer to Figure 2 、 Figure 5 、 Figure 7As shown, the swing arm structure 61 in the embodiment of the present application further includes an arm body 65, the rotating main body 63 is arranged at the first end of the arm body 65, the door plate 21 is provided with a guide groove 22 extending along the axis perpendicular to the rotating main body 63, the second end of the arm body 65 is provided with a guide block 66, the guide block 66 is arranged in the guide groove 22, and the smooth contact surface 62 is arranged on the guide block 66. The swing arm structure 61 includes the arm body 65 and the rotating main body 63, the rotating main body 63 is arranged at the first end of the arm body 65 and rotates by being sleeved on the guide rod 31. The door plate 21 is provided with the guide groove 22 extending along the axis perpendicular to the rotating main body 63, and the guide block 66 at the second end of the arm body 65 is arranged in the guide groove 22. Therefore, a stable connection relationship is established between the swing arm structure 61 and the door plate 21. During the folding and unfolding of the electronic device, the sliding of the guide block 66 in the guide groove 22 can provide clear guidance for the movement of the swing arm structure 61, so as to ensure that the swing arm structure 61 can move according to the predetermined trajectory, thereby ensuring that the opening and closing action of the door plate 21 is accurate. The cooperation of the guide block 66 and the guide groove 22 makes the movement of the swing arm structure 61 and the door plate 21 more coordinated. When the door plate 21 is opened and closed, the sliding of the guide block 66 in the guide groove 22 can timely transmit the movement of the door plate 21 to the swing arm structure 61, so as to make the swing arm structure 61 rotate correspondingly. At the same time, this cooperation can also limit the movement range of the swing arm structure 61, so as to prevent it from over-rotating or being unstable. The smooth contact surface 62 is arranged on the guide block 66, which reduces the friction between the guide block 66 and the guide groove 22, so that the movement is smoother, and the stability and reliability of the entire rotating shaft assembly are improved.

[0073] Please refer to Figure 2 , Figure 8 and Figure 9As shown, at least one side of the guide groove 22 in the embodiment of the present application is provided with a groove 23 extending along the length direction of the guide groove 22, and at least one side of the guide block 66 is provided with a guide structure 67, which is movably installed in the groove 23, and the smooth contact surface 62 is arranged on the guide structure 67 and in contact with the groove wall of the groove 23. The guide structure 67 is movably installed in the groove 23, which provides additional guidance and limitation for the movement of the guide block 66. So that the guide block 66 can only move along the length direction of the groove 23, further improving the accuracy of movement. At the same time, the smooth contact surface 62 is arranged on the guide structure 67 and in contact with the groove wall of the groove 23, which reduces the frictional resistance and makes the sliding of the guide block 66 more smooth. In the opening and closing process of the door panel 21, it is more stable. The groove 23 plays a key role in preventing the guide structure 67 from slipping out of the guide groove 22, ensuring that the connection between the swing arm structure 61 and the door panel 21 remains firm during the use of the electronic device. Whether in frequent folding and unfolding operations, or in the case of external vibration or impact, it can effectively avoid the failure caused by loose connection, improve the reliability and service life of the rotating shaft assembly. The guide structure 67 can be cylindrical, or elliptical in shape.

[0074] Please refer to Figure 2 and Figure 3 As shown, the rotating shaft assembly in the embodiment of the present application further comprises a first damping part 80, which is arranged on the base 20 and used to apply an elastic force in the first direction to the sliding block 41. During the unfolding of the two door panels 21, the first damping part 80 applies an elastic force in the first direction to the sliding block 41. This elastic force can play a damping role, effectively slowing down the movement speed of the sliding block 41, and then preventing the door panel 21 from opening too fast. The door panel 21 that opens too fast may cause a shock to the user, and even may cause damage to the device itself or surrounding objects due to the instantaneous impact force. Through the action of the first damping part 80, the door panel 21 can be unfolded at a relatively stable speed, improving the safety and comfort of the device use. With the damping effect, the user can better control the speed and intensity of unfolding the door panel 21. This makes the operation more accurate, and the user can adjust the degree of unfolding according to the actual needs, meeting the needs of different use scenarios.

[0075] The base 20 in the embodiment of the application is provided with a mounting seat, the guide rods 31 are mounted on the mounting seat, the first damping part 80 includes two first springs 81, the two first springs 81 are respectively sleeved on the two guide rods 31, the first end of the first spring 81 abuts on the mounting seat, and the second end of the first spring 81 abuts on one end of the sliding block 41 away from the swing arm part 60. The mounting seat is arranged on the base 20 to mount the guide rods 31, so that the secure mounting of the guide rods 31 is ensured, and a stable structural foundation is provided for the entire rotating shaft assembly. The two first springs 81 are respectively sleeved on the two guide rods 31, so that the force of the spring can be directly transmitted to the sliding block 41 along the direction of the guide rod 31, and it is ensured that the force transmission path is clear and stable. The first end of the first spring 81 abuts on the mounting seat, and the second end abuts on one end of the sliding block 41 away from the swing arm part 60. During the unfolding process of the door plate 21, the sliding block 41 slides away from the swing arm part 60, compresses the first spring 81, and the spring generates an elastic force to form a damping effect on the sliding block 41. This design makes the generation of damping force more reliable, and the compression and rebound process of the spring can continuously provide stable damping effect for the sliding block 41, preventing the door plate 21 from opening too fast. By selecting first springs 81 with different elastic coefficients, the size of the damping effect can be adjusted. If stronger damping force is needed, a spring with a larger elastic coefficient can be selected; if the damping force is relatively small, a spring with a smaller elastic coefficient can be selected.

[0076] After the first damping part 80 is coupled with the linkage structure 70, the damping generation and the linkage process form an integral whole. During the opening and closing process of the door plate 21, the damping effect can more closely cooperate with the movement of the linkage structure 70, realizing more accurate force transmission and movement control. The functions of the rotating shaft assembly are more coordinated, improving the operation performance of the equipment and the user experience. The coupled structure can better cope with different use cases and external disturbances. When the door plate 21 is impacted by external force or quickly opened and closed, the damping effect can respond in time, adjust the transmission of force through the linkage structure 70, and reduce the impact and damage to other components. This helps to improve the system stability of the entire electronic device and enhance the durability of the product. By coupling the first damping part 80 with the linkage structure 70, there is no need to additionally set other independent damping structures, greatly simplifying the overall design of the rotating shaft assembly. The structure inside the electronic device is more simple and clear, reducing complex connections and assembly links, improving production efficiency and product reliability. The number of parts and the processing procedures can be reduced in the manufacturing process, reducing production costs. The coupled first damping part 80 and linkage structure 70 effectively reduce the space occupation, providing more space for the layout of other electronic elements. The electronic device can realize a more lightweight appearance design while maintaining strong functions, meeting the needs of consumers for portability and aesthetics.

[0077] Please refer to Figure 5As shown, the swing arm 60 in this embodiment includes a swing arm body 68 and multiple pairs of swing arm structures 61. Two swing arm structures in each pair are respectively disposed on two swing arm bodies. A linkage structure 70 is provided between the first ends of the two swing arm structures 61 in the pair closest to the sliding part 40 and the sliding part 40. This increases the stability of the connection between the swing arm 60 and the door panel 21. Multiple pairs of swing arm structures 61 can share the force generated by the door panel 21 during opening and closing, improving the load-bearing capacity of the entire pivot assembly. Whether the electronic device is in an open or closed state, multiple pairs of swing arm structures 61 can provide more reliable support for the door panel 21, preventing the door panel 21 from shaking or deforming. Multiple pairs of swing arm structures 61 allow the force to be distributed more evenly on the swing arm body 68. When the door panel 21 is subjected to external force, the force can be transmitted to the swing arm body 68 through the multiple pairs of swing arm structures 61, and then to the body of the electronic device through other connecting components. This force dispersion effect can reduce local stress concentration and lower the risk of damage to the pivot assembly and other components of the electronic device. Multiple pairs of swing arm structures 61 can coordinate with each other during movement, ensuring smoother and more synchronized opening and closing of the door panel 21. When one pair of swing arm structures 61 moves, the other swing arm structures 61 will also adjust their positions and angles accordingly to maintain the balance and stability of the entire pivot assembly. This coordinated action prevents the door panel 21 from opening and closing with one side moving faster than the other, or one side being higher than the other, thus improving the user experience of the device.

[0078] Please refer to Figure 5 , Figure 7 , Figure 9 , Figure 10 and Figure 11 As shown, the pivot assembly in this embodiment further includes a second damping part 90, which is disposed between two adjacent pairs of swing arm structures 61. The second damping part 90 provides resistance to the rotation of the swing arm structures 61. The second damping part 90, disposed between two adjacent pairs of swing arm structures 61, can provide resistance to the rotation of the swing arm structures 61. The second damping part 90 can limit excessive and excessively rapid rotation of the swing arm structures 61, avoiding damage to the pivot assembly and electronic equipment due to excessive opening and closing. This resistance can be adjusted according to actual needs, thereby achieving precise control of the opening and closing speed and force of the door panel 21. For example, in some scenarios requiring slow opening and closing, the resistance of the second damping part 90 can be increased to prevent the door panel 21 from opening or closing too quickly, improving the safety and stability of operation.

[0079] The second damping part 90 in the embodiment of the present application includes two second springs 91 arranged side by side, the two second springs 91 are respectively sleeved on the two guide rods 31, and the second springs 91 can be compressed by the two adjacent pairs of swing arm structures 61. The rotation of the swing arm structure 61 is limited by the elastic force of the spring, the space around the guide rod 31 is fully utilized, the compact structure is realized, no extra space is occupied, the layout of the rotating shaft assembly in the electronic device is more reasonable, and the thinning and miniaturization of the electronic device are facilitated. The two second springs 91 are respectively sleeved on the two guide rods 31, so that the force of the spring can be directly transmitted to the slider 41 along the direction of the guide rod 31, and the force transmission path is clear and stable. During the opening and closing of the door plate 21, the rotation of the swing arm structure 61 may cause certain shaking and vibration. The existence of the second damping part 90 can effectively absorb the energy, reduce the amplitude of shaking and vibration, improve the use experience of the user, also can protect other parts inside the electronic device, and prolong the service life of the device.

[0080] Please refer to Figure 11 and Figure 12 It is shown that the second damping part 90 in the embodiment of the present application also includes two linkage blocks 92, the two linkage blocks 92 are respectively abutted against the two adjacent swing arm structures 61, the two ends of the second spring 91 are respectively abutted on the linkage blocks 92, the linkage blocks 92 are provided with third through holes and fourth through holes, the two guide rods 31 respectively pass through the third through holes and the fourth through holes, the end of the swing arm structure 61 close to the linkage block 92 is provided with a first spiral guide surface 93, the end of the linkage block 92 close to the swing arm structure 61 is provided with a second spiral guide surface 94, and the first spiral guide surface 93 and the second spiral guide surface 94 are abutted against each other. The two linkage blocks 92 are respectively abutted against the two adjacent swing arm structures 61, so that the elastic force of the second spring 91 can more concentratedly act on the swing arm structure 61. When the swing arm structure 61 rotates, the action force of the spring is transmitted through the first spiral guide surface 93 and the second spiral guide surface 94. During the folding process, the rotational movement of the swing arm structure 61 is converted into the axial thrust on the linkage block 92, and then the second spring 91 is compressed to generate damping force. The spiral guide surface makes the generation of damping force more smooth and continuous, improves the stability and reliability of the damping effect. The third through hole and the fourth through hole on the linkage block 92 cooperate with the guide rod 31, the guide rod 31 passes through the through hole of the linkage block 92, not only provides stable support and guidance for the linkage block 92, but also can limit the movement direction of the linkage block 92, ensures that the linkage block 92 can only move in the axial direction, thereby ensuring the accuracy and reliability of the compression and release process of the second spring 91.

[0081] Please refer to Figure 5As shown, the swing arm structure 61 in the embodiment of the present application is provided with a second protrusion 69, the linkage block 92 is provided with a second recess 95, the second protrusion 69 is matched with the second recess 95, the first helical guide surface 93 is arranged on the second protrusion 69, and the second helical guide surface 94 is arranged on the second recess 95. The second protrusion 69 is clamped in the second recess 95, so as to form a relatively stable locking state, wherein the second protrusion 69 is completely clamped in the second recess 95 when the electronic device is completely folded. When the swing arm structure 61 rotates, the first helical guide surface 93 on the second protrusion 69 and the second helical guide surface 94 on the second recess 95 can be more closely attached and interacted.

[0082] Please refer to Figure 7 As shown, the swing rod part 50 in the embodiment of the present application includes a rod body 51 and a spherical protrusion 52 arranged at both ends of the rod body 51, the first ends of the two swing rod parts 50 in each pair are ball-hinged with the sliding part 40, and the second ends of the two swing rod parts 50 in each pair are respectively ball-hinged with the two door plates 21. The swing rod part 50 includes the rod body 51 and the spherical protrusions 52 at both ends, and the first ends of the two swing rod parts 50 in each pair and the second ends thereof and the sliding part 40 and the door plate 21 can be flexibly rotated in multiple directions through the ball-hinge connection. In the use process of the electronic device, whether the door plate 21 is unfolded or folded, the ball-hinge connection can adapt to different angle and position changes, so as to ensure that the swing rod part 50 can smoothly transmit force and motion, thereby realizing the stable opening and closing of the door plate 21.

[0083] The first end of the swing rod part 50 in the embodiment of the present application is closer to the swing arm structure 61 than the second end of the swing rod part 50. When the first end of the swing rod part 50 is closer to the swing arm structure 61 than the second end, in the folding process of the door plate 21, the sliding part 40 can be caused to move along a specific first direction. The folding action is more orderly and predictable, and the jamming or unsmoothness caused by the unclear movement direction is avoided. When the door plate 21 is folded, the force can be more directly transmitted from the door plate 21 to the sliding part 40 through the swing rod part 50, and due to the special positional relationship of the swing rod part 50, the force transmission is more efficient. The certainty of the movement of the sliding part 40 along the first direction when the door plate 21 is folded makes the entire rotating shaft assembly more stable in the working process.

[0084] The rotating shaft assembly in the embodiment of the present application further includes a guide assembly 13, the guide assembly 13 is arranged on the rotating shaft assembly, the door plate 21 is connected with the guide assembly 13, the movement of the door plate 21 is assisted through the guide assembly 13, accurate guidance is realized, and the structure of the guide assembly 13 can refer to the structure of the existing folding electronic device, which will not be described herein.

[0085] Please refer to Figure 2 and Figure 13As shown, the second aspect of the present application provides a folding electronic device, characterized in that it includes a hinge assembly 12, a first body 10 and a second body 11 mounted on the hinge assembly 12. The hinge assembly 12 is as described above. The first body 10 and the second body 11 are connected to two door panels respectively. The hinge assembly 12 in the device enables the first body 10 and the second body 11 to perform smooth folding and unfolding actions like the door panels. In the folded state, the two bodies are close to each other, with a small overall volume, making it convenient to carry and store. Whether it is put into a backpack, a handbag or placed in a small space, it is very convenient. In the unfolded state, the device provides a larger screen display area and operating space, meeting the needs of users in various scenarios such as watching videos, browsing web pages, and office work. Whether in travel, office or home environment, this folding electronic device can quickly switch states according to different use scenarios, providing great convenience to users. The guide part, sliding part, swing lever part, swing arm part and linkage structure in the hinge assembly cooperate with each other to provide stable and reliable support for the device. In the process of folding and unfolding, all parts work together to ensure smooth movement of the device, without shaking, jamming or accidental opening or closing. The door panel, as an important intermediate part connecting the body and the hinge assembly, on the one hand, bears the weight of the body, providing firm support and fixation for the body; on the other hand, through close cooperation with other parts of the hinge assembly, it realizes the smooth opening and closing movement of the device. Stable and reliable structure design reduces the risk of device damage due to unstable structure, prolongs the service life of the device, and provides users with a more secure use experience. The first and second dampers in the hinge assembly play different roles at different positions, effectively preventing the door panel from opening or closing too quickly. When the device is unfolded, the damping effect makes the door panel open slowly, avoiding the shock to the user or the impact on the device itself caused by rapid unfolding. During the folding process, the damping effect ensures the smooth closing of the door panel, protecting the internal components of the device. Optimized damping effect not only improves the safety of the device, but also brings a more comfortable use experience to the user. Users can control the folding and unfolding actions of the device more easily without worrying about the sudden movement of the door panel damaging the device or causing harm to themselves. The smooth contact surface is smooth without obvious corners or abrupt changes, reducing wear and damage that may be caused by local stress concentration. When in contact with the door panel, the smooth contact surface presents a line-surface cooperation, reducing the lap requirement between the swing arm structure and the door panel. Compared with traditional hinge designs, the smooth contact surface can achieve relatively smooth contact and movement with a smaller lap amount, avoiding problems such as loose contact, increased friction and jamming due to insufficient lap amount. On the other hand, the smooth design makes the swing arm structure slide against the door panel with less friction and smoother movement, improving the stability and reliability of the hinge assembly during use.The linkage structure plays a key role between the sliding part and the first end of the swing arm structure. During the folding of the two door panels, the linkage structure converts the first direction pushing force of the sliding part into the rotating force of the swing arm structure. With the folding of the door panels, the swing arm part pushes the sliding part to move towards the swing arm part, and the linkage structure converts the linear motion of the sliding part into the rotation of the swing arm structure around the first end of the swing arm structure by specific mechanical structure, such as inclined surface cooperation. During the unfolding of the two door panels, the linkage structure converts the rotating force of the swing arm structure into the second direction pushing force of the sliding part.

[0086] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A hinge assembly for a foldable electronic device, the foldable electronic device comprising a first body and a second body, characterized in that, The pivot assembly includes a base and two door panels that are oscillatingly mounted on both sides of the base. The first body and the second body are respectively connected to the two door panels. The pivot assembly also includes: A guide portion, the guide portion extending along the length direction of the base; A sliding part, which is slidably mounted on the guide part; The swing arm parts are arranged in pairs. The first ends of the two swing arm parts in each pair are rotatably connected to the sliding part with multiple degrees of freedom. The second ends of the two swing arm parts in each pair are rotatably connected to the two door panels with multiple degrees of freedom. During the closing process of the two door panels, the two swing arm parts in each pair apply a thrust in a first direction to the sliding part. The swing arm portion includes a pair of swing arm structures. The first ends of the two swing arm structures in each pair are rotatably mounted on the base about the length direction of the base. The second ends of the two swing arm structures in each pair are slidably connected to the two door panels respectively. The second end of the swing arm structure is provided with a smooth contact surface and contacts the door panel through the smooth contact surface. A linkage structure is provided between the sliding part and the first end of the swing arm structure, which is used to convert the thrust of the sliding part in the first direction into the rotational force of the swing arm structure during the closing of the two door panels; and to convert the rotational force of the swing arm structure into the thrust of the sliding part in the second direction during the unfolding of the two door panels. Wherein, the first direction is the direction from the sliding part to the swing arm part, and the second direction is opposite to the first direction.

2. The rotating shaft assembly according to claim 1, characterized in that, The linkage structure includes a first mating surface and a second mating surface. The first mating surface is disposed at one end of the sliding part near the swing arm part, and the second mating surface is disposed at one end of the swing arm part near the sliding part. The first mating surface and the second mating surface abut against each other. At least one of the first mating surface and the second mating surface is an inclined surface. The inclined surface gradually slopes from the outside of the rotating shaft assembly to the inside of the rotating shaft assembly in the direction indicated by the first direction.

3. The rotating shaft assembly according to claim 2, characterized in that, Both the first mating surface and the second mating surface are helical inclined surfaces, and the two helical inclined surfaces are adapted to each other.

4. The rotating shaft assembly according to claim 3, characterized in that, The linkage structure includes a first protrusion and a first recess. The first protrusion is disposed at one end of the sliding part near the swing arm part, and the first recess is disposed at one end of the swing arm part near the sliding part. The first protrusion and the first recess are adapted to each other. The first mating surface is disposed on the first protrusion, and the second mating surface is disposed on the first recess.

5. The rotating shaft assembly according to claim 4, characterized in that, The guide portion includes two guide rods arranged side by side, the guide rods extending along the length direction of the base, the sliding portion includes a slider, the slider has two first through holes, the two guide rods are respectively inserted into the two first through holes, the first protrusion is arranged circumferentially along the first through holes, and the axis of the helical inclined surface coincides with the axis of the guide rod.

6. The rotating shaft assembly according to claim 5, characterized in that, The first end of the swing arm structure is provided with a rotating body, and the rotating body is provided with a second through hole. The rotating body is rotatably sleeved on the guide rod through the second through hole. The first recess is provided on the rotating body and is arranged circumferentially along the second through hole.

7. The rotating shaft assembly according to claim 6, characterized in that, The swing arm structure also includes an arm body, the rotating body is disposed at the first end of the arm body, the door panel is provided with a guide groove extending perpendicular to the axis of the rotating body, the second end of the arm body is provided with a guide block, the guide block passes through the guide groove, and the smooth contact surface is disposed on the guide block.

8. The rotating shaft assembly according to claim 7, characterized in that, At least one side wall of the guide groove is provided with a groove extending along the length direction of the guide groove, and at least one side wall of the guide block is provided with a guide structure. The guide structure is movably installed in the groove, and the smooth contact surface is provided on the guide structure and contacts the groove wall.

9. The rotating shaft assembly according to claim 5, characterized in that, The rotating shaft assembly further includes a first damping part disposed on the base for applying an elastic force in a first direction to the slider.

10. The rotating shaft assembly according to claim 9, characterized in that, The base is provided with a mounting seat, and the guide rod is mounted on the mounting seat. The first damping part includes two first springs, which are respectively sleeved on the two guide rods. The first end of the first spring abuts against the mounting seat, and the second end of the first spring abuts against the end of the slider away from the swing arm.

11. The rotating shaft assembly according to claim 1, characterized in that, The swing arm portion includes two swing arm bodies, and the swing arm structure is in multiple pairs. Two of the swing arm structures in each pair are respectively disposed on the two swing arm bodies. The linkage structure is disposed between the first end of the two swing arm structures in the pair closest to the sliding part and the sliding part.

12. The rotating shaft assembly according to claim 9, characterized in that, The pivot assembly further includes a second damping section disposed between two adjacent pairs of the swing arm structures, the second damping section being used to provide resistance to the rotation of the swing arm structures.

13. The shaft assembly according to claim 12, characterized in that, The second damping part includes two second springs arranged side by side, each of which is sleeved on one of the two guide rods. The second springs can be compressed by two adjacent pairs of swing arm structures.

14. The shaft assembly according to claim 13, characterized in that, The second damping part further includes two linkage blocks, which abut against two adjacent swing arm structures respectively. The two ends of the second spring abut against the linkage blocks respectively. The linkage blocks are provided with a third through hole and a fourth through hole. The two guide rods pass through the third through hole and the fourth through hole respectively. The end of the swing arm structure near the linkage block is provided with a first helical guide surface, and the end of the linkage block near the swing arm structure is provided with a second helical guide surface. The first helical guide surface and the second helical guide surface abut against each other.

15. The shaft assembly according to claim 14, characterized in that, The swing arm structure is provided with a second protrusion, and the linkage block is provided with a second recess. The second protrusion and the second recess are adapted to each other. The first helical guide surface is provided on the second protrusion, and the second helical guide surface is provided on the second recess.

16. The rotating shaft assembly according to claim 1, characterized in that, The swing arm includes a rod body and spherical protrusions at both ends of the rod body. The first ends of the two swing arm parts in each pair are connected to the ball joint of the sliding part, and the second ends of the two swing arm parts in each pair are respectively connected to the ball joints of the two door panels.

17. The rotating shaft assembly according to claim 1, characterized in that, The first end of the swing arm is closer to the swing arm structure than the second end of the swing arm.

18. A foldable electronic device, characterized in that, It includes a pivot assembly and a first body and a second body mounted on the pivot assembly, wherein the pivot assembly is the pivot assembly according to any one of claims 1-17, and the first body and the second body are respectively connected to the two door panels.

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