Rotating mechanism and foldable electronic device

Abstract

This application provides a rotating mechanism and a foldable electronic device. The rotating mechanism includes a first fixed plate, a second fixed plate, a support base, a first synchronous swing arm, and a second synchronous swing arm. The first synchronous swing arm includes a first swing arm and a second swing arm, which are detachably connected. The first swing arm includes a first swing body, a first connecting body, and a first helical body connected sequentially along the width direction of the rotating mechanism. The first swing body is slidably and rotatably connected to the first fixed plate; the first helical body is rotatably connected to the support base. The second swing arm includes a second swing body, a second connecting body, and a second helical body connected sequentially along the width direction of the rotating mechanism. The second swing body is slidably and rotatably connected to the second fixed plate, and the second helical body is rotatably connected to the support base. The separation of the first and second swing arms reduces processing difficulty, improves processing efficiency, and reduces costs.

Description

[0001] This application is a divisional application of Chinese patent application filed on September 29, 2022, with application number 202211202161.X and entitled "Rotating Mechanism and Foldable Electronic Device". Technical Field

[0002] This application relates to the field of electronic product technology, and more particularly to a rotating mechanism and a foldable electronic device. Background Technology

[0003] With the development of technology, various electronic devices have become indispensable products in daily life and production. Among them, foldable electronic devices have gradually become a development trend due to their advantages of large display area and portability. Currently, foldable electronic devices mainly rely on a rotating mechanism to achieve folding and unfolding functions. Existing rotating mechanisms use a structure of multiple gears to achieve synchronous movement during the folding process.

[0004] However, current rotating mechanisms have many components such as synchronous gears, which are difficult to manufacture, have low manufacturing efficiency, and are costly. Summary of the Invention

[0005] This application provides a rotating mechanism and a foldable electronic device, which are relatively simple to manufacture and have low cost.

[0006] The first aspect of this application provides a rotating mechanism, including: a first fixed plate, a second fixed plate, a bearing base, a first synchronous swing arm, and a second synchronous swing arm.

[0007] The first fixed plate and the second fixed plate are located on opposite sides of the bearing base; the first synchronous swing arm and the second synchronous swing arm are respectively installed on opposite sides of the bearing base in the width direction and are rotatably connected to the bearing base; the first synchronous swing arm is slidably and rotatably connected to the first fixed plate, and the second synchronous swing arm is slidably and rotatably connected to the second fixed plate.

[0008] The first synchronous swing arm includes a first swing arm and a second swing arm, which are detachably connected. The first swing arm includes a first oscillating body, a first connecting body, and a first spiral body connected sequentially along the width direction of the rotating mechanism. The first oscillating body is slidably and rotatably connected to the first fixed plate. The first spiral body is rotatably connected to the bearing base. The second swing arm includes a second oscillating body, a second connecting body, and a second spiral body connected sequentially along the width direction of the rotating mechanism. The second oscillating body is slidably and rotatably connected to the second fixed plate, and the second spiral body is rotatably connected to the bearing base.

[0009] In this embodiment, the first and second swing arms are detachably connected during assembly, and are separate units when not assembled. Therefore, the first and second swing arms are processed independently. The dimensions of the first and second swing arms along the length of the rotating mechanism are smaller than those of a single-piece swing arm, thus reducing the processing difficulty, improving processing efficiency, and lowering costs. In particular, after the first and second swing arms are separated, they can be processed using molds, significantly increasing processing efficiency and accuracy compared to traditional computer numerical control (CNC) machine tool processing.

[0010] In some embodiments, the rotating mechanism further includes a first mounting shaft, which is fixedly connected to a bearing base. The first helical body has a first through hole and a first helical surface, the axial direction of the first through hole being parallel to the length direction of the rotating mechanism; the first helical surface extends helically around the axial direction of the first through hole; the first mounting shaft passes through the first through hole; and the first helical body is capable of rotating around the first mounting shaft.

[0011] In some embodiments, the rotating mechanism further includes a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider has a first mating surface, the first mating surface being a helical surface; the first helical surface abuts against the first mating surface.

[0012] When the rotating mechanism switches from the unfolded state to the folded state, the first fixed plate rotates counterclockwise, and the first and second swing arms slide relative to the first fixed plate and rotate counterclockwise. The first and second swing arms also rotate counterclockwise relative to the supporting base, and the first helical surface pushes against the first mating surface, causing the synchronous slider to slide along the length direction (negative Y-axis direction) of the rotating mechanism. The second fixed plate rotates clockwise, and the second synchronous swing arm slides relative to the second fixed plate and rotates. Under the action of the synchronous slider, the second synchronous swing arm moves synchronously with the first and second swing arms.

[0013] When the rotating mechanism switches from a folded state to an unfolded state, the first fixed plate rotates clockwise, and the first and second swing arms slide relative to the first fixed plate and rotate clockwise. The first and second swing arms also rotate clockwise relative to the support base, and the synchronous slider slides along the length direction (positive Y-axis) of the rotating mechanism. The second fixed plate rotates counterclockwise, and the second synchronous swing arm slides and rotates relative to the second fixed plate and relative to the support base. Under the action of the synchronous slider, the second synchronous swing arm, the first swing arm, and the second swing arm move synchronously.

[0014] In this application, the first synchronous swing arm comprises two parts: a first swing arm and a second swing arm. The first and second swing arms are detachably connected, allowing the first synchronous swing arm to perform the same synchronous function as a one-piece swing arm. Furthermore, a first through hole in the first swing arm extends through the first swing arm along the Y-axis, making it possible to process the first swing arm using a mold.

[0015] Specifically, when machining the first swing arm, the raw material is placed in the lower mold of the die, and then the lower mold is driven to engage with the upper mold, so that the upper and lower molds cooperate to machine the first through hole and the first helical surface. Since the first through hole penetrates the first swing arm along the Y-axis, it can be ejected from the die in the Y-axis direction. Therefore, compared with the structure of an integrated synchronous swing arm that must be machined using CNC machining, it is easier to machine, and the die machining efficiency is higher, the precision is higher, and the cost is lower.

[0016] In some embodiments, the first through hole is a circular hole, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the hole wall in the Y-axis direction is always consistent, without any local protrusions or depressions. Therefore, after machining the first through hole, it can be smoothly demolded, thus realizing the solution of machining the first swing arm using a mold.

[0017] In some embodiments, the first swing body is a thin plate, and the first helical body is a cylindrical shape with an inclined notch (first helical opening). The first connecting body is approximately S-shaped and connects the first swing body and the first helical body, facilitating the connection of the first swing body to the first fixed plate and the connection of the first helical body to the bearing base. This type of first swing arm has a simple structure, can be molded using a mold, reduces costs, and improves processing efficiency.

[0018] In some embodiments, the first helix includes a first inner circumferential surface, a first outer circumferential surface, and a first end wall surface; the first inner circumferential surface is the wall surface of the first through hole, and the first outer circumferential surface faces away from the first inner circumferential surface; the first end wall surface connects the first inner circumferential surface and the first outer circumferential surface, and the first through hole penetrates the first end wall surface; the opposite sides of the first helical surface are respectively connected to the first inner circumferential surface and the first outer circumferential surface, and one side of the first helical surface is connected to the first end wall surface. The first inner circumferential surface, the first outer circumferential surface, the first end wall surface, the first through hole, and the first helical surface can all be machined using molds, which reduces costs and improves processing efficiency.

[0019] In some embodiments, the synchronous slider includes a synchronous body and a first spiral block that are fixedly connected. The synchronous body is slidably mounted on a support base. The first spiral block has a first through hole and a first mating surface. The first through hole passes through the first spiral block along the length direction of the rotating mechanism. The first through hole is coaxial with the first through hole. The first mounting shaft also passes through the first through hole. The first mating surface extends spirally around the first through hole in the axial direction. The first spiral block can slide along the first mounting shaft.

[0020] Specifically, the synchronization body includes a first synchronization surface and a second synchronization surface opposite to each other along the Z-axis, and a first synchronization side surface and a second synchronization side surface opposite to each other along the X-axis. The first synchronization side surface is connected between one side of the first synchronization surface and one side of the second synchronization surface, and the second synchronization side surface is connected between the other side of the first synchronization surface and the other side of the second synchronization surface. Both the first synchronization side surface and the second synchronization side surface are inclined arc-shaped surfaces. Both the first synchronization side surface and the second synchronization side surface are inclined relative to the central axis of the synchronization slider along the Z-axis, and the inclination direction of both the first synchronization side surface and the second synchronization side surface is opposite to the central axis of the synchronization slider 43 along the axial direction.

[0021] The first spiral block is formed by protrusion along the first synchronous side and is cylindrical. A first through hole extends through the first spiral block along the Y-axis, allowing the first spiral block to be machined using a mold. Specifically, the raw material is placed in the lower mold, and then the upper mold is driven to engage with the lower mold to machine the required structure onto the raw material, forming the first spiral block. After machining, it can be ejected from the mold along the Y-axis.

[0022] In traditional structures, because the synchronous rocker arm is integrally molded, the helical structure at the point where the synchronous slider mates with the synchronous rocker arm is relatively long. This long helical structure is internally spiral-shaped and cannot be machined using molds; it can only be produced by CNC machining. In this application, the first through hole and the first mating surface can be machined using molds, which is lower in cost and more efficient than CNC machining.

[0023] In some embodiments, the first helical block further includes a second mating surface, which is a helical surface. The second mating surface and the first mating surface are located on opposite sides of the first through hole. The second mating surface extends helically around the axial direction of the first through hole. The second swing arm includes a second through hole and a second helical surface. The axial direction of the second through hole is parallel to the length direction of the rotating mechanism. The second through hole is coaxial with the first through hole. The first mounting shaft also passes through the second through hole, and the second swing arm can rotate around the first mounting shaft. The second helical surface extends helically around the axial direction of the second through hole. The second helical surface abuts against the second mating surface.

[0024] When the rotating mechanism switches from a folded state to an unfolded state, the first fixed plate rotates clockwise, and the first and second swing arms rotate clockwise. The second helical surface pushes against the second mating surface, causing the synchronous slider to slide along the length direction (positive Y-axis direction) of the rotating mechanism. The second fixed plate rotates counterclockwise, and the second synchronous swing arm slides and rotates relative to the second fixed plate and relative to the bearing base. Under the action of the synchronous slider, the second synchronous swing arm, the first swing arm, and the second swing arm move synchronously.

[0025] The second through hole in the second swing arm extends along the Y-axis, making it possible to machine the second swing arm using a mold. Specifically, during the machining of the second swing arm, the raw material is placed in the lower mold, and then the lower mold is driven to engage with the upper mold, causing the upper and lower molds to cooperate in machining the second through hole and the second helical surface. Because the second through hole extends along the Y-axis, the mold can be ejected from the Y-axis direction. Therefore, compared to the structure of an integrated synchronous swing arm that must be machined using CNC machining, this design is easier to manufacture, and the mold machining efficiency is higher, the precision is higher, and the cost is lower.

[0026] In some embodiments, the first spiral block further comprises a first connecting surface, a second connecting surface, a first inner wall surface, and a first outer wall surface; the first inner wall surface and the first outer wall surface are opposite to each other along the length direction of the rotating mechanism, and the first through hole penetrates the first connecting surface and the second connecting surface; a portion of the first inner wall surface is the hole wall surface of the first through hole, and the first outer wall surface is opposite to the first inner wall surface; one end of the first mating surface is connected to the first connecting surface, and the other end of the first mating surface extends away from the first connecting surface and is connected to the synchronization body; one end of the second mating surface is connected to the second connecting surface, and the other end of the second mating surface extends away from the second connecting surface and is connected to the synchronization body. Thus, the first connecting surface, the second connecting surface, the first inner wall surface, the first outer wall surface, the first mating surface, the second mating surface, and the first through hole can all be machined using molds. This reduces costs and improves processing efficiency.

[0027] In some embodiments, the curvature of the first inner wall surface is equal along the length of the rotating mechanism, i.e., it remains constant. This ensures that the first inner wall surface, especially the portion forming the first through hole, can be machined using a mold.

[0028] In some embodiments, the synchronizing body is provided with a first ejection groove, which extends through the synchronizing body along the thickness direction of the rotating mechanism; in the thickness direction of the rotating mechanism, a portion of the second mating surface is flush with the groove wall of the first ejection groove. Therefore, when machining the second mating surface, the position of the first ejection groove can be used to eject the mold along the Z-axis, solving the problem of the second mating surface being difficult to eject, and allowing the second mating surface to be machined by a mold.

[0029] In some embodiments, the support base is provided with a first mounting groove, and a portion of the first swing arm, a portion of the second swing arm, the synchronous slider, and the first mounting shaft are all located in the first mounting groove. The two ends of the first mounting shaft are respectively fixedly connected to two opposite groove walls of the first mounting groove. As a result, the rotating mechanism has a more compact structure and smaller size, making the rotating mechanism lighter and thinner.

[0030] In some embodiments, the synchronous slider further includes a first connecting block, which is fixedly connected to the synchronous body and located on the same side of the synchronous body as the first spiral block; the first connecting block is provided with a first through hole, which is coaxial with the first through hole, and the first mounting shaft also passes through the first through hole; the rotating mechanism further includes a first pre-pressing member and a second pre-pressing member; the first pre-pressing member and the second pre-pressing member are both sleeved on the first mounting shaft; the first pre-pressing member is located between the first spiral body and the groove wall of the first mounting groove to provide pre-tightening force for the engagement of the first spiral surface and the first mating surface; the second pre-pressing member is located between the first spiral body and the first connecting block to provide pre-tightening force for the engagement of the second spiral surface and the second mating surface.

[0031] The first and second preload components are disc springs or wave springs. During assembly of the rotating mechanism, slightly compressing the first preload component provides preload force between the first helical surface and the first mating surface. Similarly, slightly compressing the second preload component provides preload force between the second helical surface and the second mating surface.

[0032] This ensures that there is a contact force between the first helical surface and the first mating surface, preventing synchronization failure and increasing the reliability of the synchronization component. Similarly, ensuring that there is a contact force between the second helical surface and the second mating surface also prevents synchronization failure and increases the reliability of the synchronization component.

[0033] In some embodiments, the rotating mechanism further includes a first adjusting member and a second adjusting member, both of which are sleeved on the first mounting shaft. The first adjusting member is located between the groove wall of the first mounting groove and the first pre-compression member, and the second adjusting member is located between the first connecting block and the second pre-compression member.

[0034] The position of the first adjusting member in the axial direction of the first mounting shaft can be adjusted so that the first adjusting member moves toward or away from the first preload member; when the first adjusting member moves toward the first preload member, the force applied by the first adjusting member to the first preload member increases, and the preload provided by the first preload member increases; when the first adjusting member moves away from the first preload member, the force applied by the first adjusting member to the first preload member decreases, and the preload provided by the first preload member decreases.

[0035] The position of the second adjusting member in the axial direction of the first mounting shaft can be adjusted so that the second adjusting member moves toward or away from the second preload member; when the second adjusting member moves toward the second preload member, the force applied by the second adjusting member to the second preload member increases, and the preload force provided by the second preload member increases; when the second adjusting member moves away from the second preload member, the force applied by the second adjusting member to the second preload member decreases, and the preload force provided by the second preload member decreases.

[0036] The first adjusting component is a lock nut, and it is threadedly engaged with the first mounting shaft. The first adjusting component abuts against the first preload component. When the first adjusting component is screwed along the first direction, it moves closer to the first preload component, increasing the compression amplitude of the first preload component. This increases the force exerted by the first preload component on the first helical body of the first swing arm. Thus, the preload force between the first helical surface and the first mating surface is increased.

[0037] When the first adjusting member is turned in the second direction, which is opposite to the first direction, for example, the first direction is counterclockwise and the second direction is clockwise; or the first direction is clockwise and the second direction is counterclockwise. At this time, the first adjusting member moves away from the first pre-compression member, reducing the compression amplitude of the first pre-compression member. This increases the force exerted by the first pre-compression member on the first helical body of the first swing arm. Thus, the preload between the first helical surface and the first mating surface is reduced.

[0038] The second adjusting component is a retaining ring. When the position of the second adjusting component on the first mounting shaft needs to be adjusted, the operator manually or with tools removes the second adjusting component from the first mounting shaft. Then, the operator manually or with tools reinstalls the second adjusting component onto the first mounting shaft. At this point, the axial position of the second adjusting component on the first mounting shaft changes. If the second adjusting component is closer to the second preload component than before, that is, if the second adjusting component has moved towards the second preload component, the compression amplitude of the second preload component increases. This increases the force exerted by the second preload component on the second helical body of the second swing arm. Thus, the preload force between the second helical surface and the second mating surface is increased.

[0039] If the second adjusting member is further away from the second preload member than before, that is, if the second adjusting member moves away from the second preload member, the compression amplitude of the second preload member is reduced. At this time, the force exerted by the second preload member on the second helical body of the second swing arm is reduced. Thus, the preload force between the second helical surface and the second mating surface is reduced.

[0040] The preload is adjusted by using the first and second adjusting components, which allows the synchronization components to better perform their synchronizing function.

[0041] In some embodiments, the second through hole is a circular hole, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the hole wall in the Y-axis direction is always consistent, without any local protrusions or depressions. Therefore, after machining the second through hole, it can be easily demolded, thus realizing the solution of machining the second swing arm using a mold.

[0042] In some embodiments, the second swing body is a thin plate, and the second helical body is a cylindrical shape with an inclined notch (second helical opening). The second connecting body is approximately S-shaped and connects the second swing body and the second helical body, facilitating the connection of the second swing body to the first fixed plate and the second helical body to the bearing base. This type of second swing arm has a simple structure, can be molded using a mold, reduces costs, and improves processing efficiency.

[0043] In some embodiments, the second helix includes a second inner circumferential surface, a second outer circumferential surface, and a second end wall surface; the second inner circumferential surface is the wall surface of the second through hole, and the second outer circumferential surface faces away from the second inner circumferential surface; the second end wall surface connects the second inner circumferential surface and the second outer circumferential surface, and the second through hole penetrates the second end wall surface; the opposite sides of the second helical surface are respectively connected to the second inner circumferential surface and the second outer circumferential surface, and one end of the second helical surface is connected to the two end walls. The second inner circumferential surface, the second outer circumferential surface, the second end wall surface, the second through hole, and the second helical surface can all be machined using molds, reducing costs and improving processing efficiency.

[0044] In some embodiments, one of the first and second swing arms is provided with a snap-fit ​​groove, and the other of the first and second swing arms is provided with a snap-fit ​​block; the snap-fit ​​block snaps into the snap-fit ​​groove. The first and second swing arms are detachably connected by the snap-fit ​​groove and the snap-fit ​​block, which has a simple structure, is easy to manufacture, and has a low cost.

[0045] In some embodiments, a resilient buckle is provided on one side of the first swing arm, which is the aforementioned snap-fit ​​block. An inner groove is provided on one side of the second swing arm, which is the aforementioned snap-fit ​​groove. The resilient buckle snaps into the inner groove, thereby enabling a detachable connection between the first and second swing arms.

[0046] In some embodiments, one side of the first swing arm is provided with alternating first locking slots and first locking blocks; one side of the second swing arm is provided with alternating second locking slots and second locking blocks; the first locking block is engaged in the second locking slot, and the second locking block is engaged in the first locking slot. This makes the structure of the first synchronous swing arm relatively compact, and the connection between the first and second swing arms highly reliable.

[0047] In some embodiments, both the first latching block and the first latching slot are trapezoidal in shape. The long base of the first latching block is aligned with the opening of the first latching slot, and the short base of the first latching block is aligned with the bottom surface of the first latching slot. Similarly, both the second latching block and the second latching slot are trapezoidal in shape. The long base of the second latching block is aligned with the opening of the second latching slot, and the short base of the second latching block is aligned with the bottom surface of the second latching slot. Connecting the first and second swing arms allows the first latching block to engage with the second latching slot along the Z-axis, while the second latching block engages with the first latching slot. Because the first and second latching slots, the first and second latching blocks are all trapezoidal, there is no relative movement along the Z-axis when the first and second swing arms move. However, during movement along the X and Y axes, the first latching block is reliably connected to the second latching slot and will not disengage. Likewise, the second latching block is reliably connected to the first latching slot and will not disengage. This ensures a reliable connection between the first and second swing arms, while also reducing costs and facilitating manufacturing.

[0048] In some embodiments, the second synchronous swing arm includes a third swing arm and a fourth swing arm, which are detachably connected. The third swing arm includes a third oscillating body, a third connecting body, and a third helical body connected sequentially along the width direction of the rotating mechanism; the third oscillating body is slidably and rotatably connected to the second fixed plate, and the third helical body is rotatably connected to the bearing base; the fourth swing arm includes a fourth oscillating body, a fourth connecting body, and a fourth helical body connected sequentially along the width direction of the rotating mechanism; the fourth oscillating body is slidably and rotatably connected to the second fixed plate, and the fourth helical body is rotatably connected to the bearing base.

[0049] In the assembled state, the third and fourth swing arms are detachably connected. When not assembled, the third and fourth swing arms can be separated into individual units, allowing for independent machining. The dimensions of the third and fourth swing arms along the length of the rotating mechanism are smaller than those of the integrated swing arms, thus reducing machining difficulty, improving efficiency, and lowering costs. In particular, after the third and fourth swing arms are separated, they can be machined using molds, significantly increasing machining efficiency and accuracy compared to traditional CNC machining methods.

[0050] In some embodiments, the rotating mechanism further includes a second mounting shaft, which is fixedly connected to the bearing base; the third helical body is provided with a third through hole and a third helical surface, the axial direction of the third through hole is parallel to the length direction of the rotating mechanism; the third helical surface extends helically around the axial direction of the third through hole; the second mounting shaft passes through the third through hole, and the third helical body can rotate around the second mounting shaft.

[0051] In some embodiments, the rotating mechanism further includes a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider has a third mating surface, the third mating surface is a helical surface, and the third helical surface abuts against the third mating surface.

[0052] When the rotating mechanism switches from the unfolded state to the folded state, the second fixed plate rotates clockwise, and the third and fourth swing arms rotate clockwise. The third helical surface pushes against the third mating surface, causing the synchronous slider to slide along the length direction (negative Y-axis direction) of the rotating mechanism. When the rotating mechanism switches from the folded state to the unfolded state, the second fixed plate rotates counterclockwise, and the third and fourth swing arms rotate counterclockwise. The synchronous slider slides along the length direction (positive Y-axis direction) of the rotating mechanism.

[0053] In this application, the second synchronous swing arm comprises a third swing arm and a fourth swing arm. The detachable connection between the third and fourth swing arms allows the second synchronous swing arm to perform the same synchronous function as the integrally formed swing arm. Furthermore, the third through hole in the third swing arm penetrates the first swing arm along the Y-axis, making it possible to machine the third swing arm using a mold.

[0054] Specifically, when machining the third swing arm, the raw material is placed in the lower mold, and then the lower mold is driven to engage with the upper mold, so that the upper and lower molds cooperate to machine the third through hole and the third helical surface. Because the third through hole penetrates the third swing arm along the Y-axis, it can be ejected from the mold in the Y-axis direction. Therefore, compared with the structure of an integrated synchronous swing arm that must be machined using CNC machining, it is easier to machine, and the mold processing efficiency is higher, the precision is higher, and the cost is lower.

[0055] In some embodiments, the third through hole is a circular hole, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the hole wall in the Y-axis direction is always consistent, without any local protrusions or depressions. Therefore, after machining the third through hole, it can be easily demolded, thus realizing the solution of machining the third swing arm using a mold.

[0056] In some embodiments, the third swing body is a thin plate, and the third helical body is a cylindrical shape with an inclined notch (third helical opening). The third connecting body is approximately S-shaped and connects the third swing body and the third helical body, facilitating the connection of the third swing body to the second fixed plate and the connection of the third helical body to the bearing base. This type of third swing arm has a simple structure, can be molded using a mold, reduces costs, and improves processing efficiency.

[0057] In some embodiments, the third helix includes a third inner circumferential surface, a third outer circumferential surface, and a third end wall surface; the third inner circumferential surface is the wall surface of the third through hole, and the third outer circumferential surface faces away from the third inner circumferential surface; the third end wall surface connects the third inner circumferential surface and the third outer circumferential surface, and the third through hole penetrates the third end wall surface; the opposite sides of the third helical surface are respectively connected to the third inner circumferential surface and the third outer circumferential surface, and one end of the third helical surface is connected to the third end wall surface. The third inner circumferential surface, the third outer circumferential surface, the third end wall surface, the third through hole, and the third helical surface can all be machined using molds, reducing costs and improving processing efficiency.

[0058] In some embodiments, the synchronizing slider includes a synchronizing body and a second helical block that are fixedly connected. The synchronizing body is slidably mounted on a support base. The second helical block is provided with a second through hole and a third mating surface. The second through hole passes through the second helical block along the length direction of the rotating mechanism. The second through hole is coaxial with the second through hole, and the second mounting shaft also passes through the second through hole. The third mating surface extends helically around the second through hole. The second helical block is capable of sliding along the second mounting shaft.

[0059] Specifically, the second spiral block protrudes along the second synchronous side and is cylindrical. A second through hole extends through the second spiral block along the Y-axis, allowing it to be machined using a mold. Specifically, the raw material is placed in the lower mold, and then the upper mold is driven to engage with the lower mold to machine the desired structure onto the raw material, forming the second spiral block. After machining, it can be ejected from the mold along the Y-axis.

[0060] In traditional structures, because the synchronous rocker arm is integrally molded, the helical structure at the point where the synchronous slider mates with the synchronous rocker arm is relatively long. This long helical structure is internally spiral-shaped and cannot be machined using molds; it can only be produced by CNC machining. The second through hole and the third mating surface in this application can be machined using molds, which is lower in cost and more efficient than CNC machining.

[0061] In some embodiments, the second helical block further includes a fourth mating surface, which is a helical surface. The fourth mating surface and the third mating surface are located on opposite sides of the second through hole. The fourth mating surface extends helically around the second through hole. The fourth swing arm includes a fourth through hole and a fourth helical surface. The axial direction of the fourth through hole is parallel to the length direction of the rotating mechanism. The fourth through hole and the third through hole are coaxial. The second mounting shaft also passes through the fourth through hole. The fourth helical body can rotate around the second mounting shaft. The fourth helical surface extends helically around the fourth through hole. The third helical surface abuts against the third mating surface.

[0062] When the rotating mechanism switches from the folded state to the unfolded state, the second fixed plate rotates counterclockwise, the third and fourth swing arms rotate counterclockwise, the fourth spiral surface pushes against the fourth mating surface, and the synchronous slider slides along the length direction (positive Y-axis direction) of the rotating mechanism.

[0063] The fourth through hole in the fourth swing arm extends along the Y-axis, making it possible to machine the fourth swing arm using a mold. Specifically, during the machining of the fourth swing arm, the raw material is placed in the lower mold, and then the lower mold is driven to engage with the upper mold, causing the upper and lower molds to cooperate in machining the fourth through hole and the fourth helical surface. Because the fourth through hole extends along the Y-axis, the mold can be ejected from the Y-axis direction. Therefore, compared to the structure of an integrated synchronous swing arm that must be machined using CNC machining, this design is easier to manufacture, and the mold machining efficiency, precision, and cost are all higher.

[0064] In some embodiments, the second spiral block further comprises a third connecting surface, a fourth connecting surface, a second inner wall surface, and a second outer wall surface; the second inner wall surface and the second outer wall surface are opposite to each other along the length direction of the rotating mechanism, and the second through hole penetrates the third connecting surface and the fourth connecting surface; a portion of the second inner wall surface is the hole wall surface of the second through hole, and the second outer wall surface is opposite to the second inner wall surface; one end of the third mating surface is connected to the third connecting surface, and the other end of the third mating surface extends away from the third connecting surface and is connected to the synchronization body; one end of the fourth mating surface is connected to the fourth connecting surface, and the other end of the fourth mating surface extends away from the fourth connecting surface and is connected to the synchronization body.

[0065] Therefore, the third connecting surface, the fourth connecting surface, the second inner wall surface, the second outer wall surface, the third mating surface, the fourth mating surface, and the second through hole can all be machined using molds. This reduces costs and improves processing efficiency.

[0066] In some embodiments, the curvature of the second inner wall surface remains constant along the length of the rotating mechanism. This ensures that the second inner wall surface, particularly the portion forming the second through hole, can be machined using a mold.

[0067] In some embodiments, the synchronizing body is provided with a second ejection groove, which extends through the synchronizing body along the thickness direction of the rotating mechanism; in the thickness direction of the rotating mechanism, a portion of the fourth mating surface is flush with the groove wall of the second ejection groove. Therefore, when machining the fourth mating surface, the position of the second ejection groove can be used to eject the mold along the Z-axis, solving the problem of the fourth mating surface being difficult to eject, and allowing the fourth mating surface to be machined by a mold.

[0068] In some embodiments, the fourth through hole is a circular hole, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the hole wall in the Y-axis direction is always consistent, without any local protrusions or depressions. Therefore, after machining the fourth through hole, it can be easily demolded, thus realizing the solution of machining the fourth swing arm using a mold.

[0069] In some embodiments, the fourth helix includes a fourth inner circumferential surface, a fourth outer circumferential surface, and a fourth end wall surface; the fourth inner circumferential surface is the wall surface of the fourth through hole, and the fourth outer circumferential surface faces away from the fourth inner circumferential surface; the fourth end wall surface connects the fourth inner circumferential surface and the fourth outer circumferential surface, and the fourth through hole penetrates the fourth end wall surface; the opposite sides of the fourth helical surface are respectively connected to the fourth inner circumferential surface and the fourth outer circumferential surface, and one end of the fourth helical surface is respectively connected to the fourth end wall surface. The fourth inner circumferential surface, the fourth outer circumferential surface, the fourth end wall surface, the fourth through hole, and the fourth helical surface can all be machined using molds, reducing costs and improving processing efficiency.

[0070] In some embodiments, the support base is provided with a first mounting groove, and a portion of the third swing arm, a portion of the fourth swing arm, the synchronous slider, and the second mounting shaft are all mounted in the first mounting groove; the two ends of the second mounting shaft are respectively fixedly connected to the two groove walls of the first mounting groove. This makes the rotating mechanism more compact and smaller in size, resulting in a lighter and thinner rotating mechanism.

[0071] In some embodiments, the synchronizing slider further includes a second connecting block, which is fixedly connected to the synchronizing body and located on the same side of the synchronizing body as the second spiral block; the second connecting block is provided with a second through hole, which is coaxial with a third through hole, and the second mounting shaft also passes through the second through hole; the rotating mechanism further includes a third pre-pressing member and a fourth pre-pressing member; the third pre-pressing member and the fourth pre-pressing member are both sleeved on the second mounting shaft; the third pre-pressing member is located between the third spiral body and the groove wall of the first mounting groove to provide pre-tightening force for the engagement of the third spiral surface and the third mating surface; the fourth pre-pressing member is located between the third spiral body and the second connecting block to provide pre-tightening force for the engagement of the fourth spiral surface and the fourth mating surface.

[0072] The third and fourth preload components are disc springs or wave springs. During assembly of the rotating mechanism, slightly compressing the third preload component provides preload force between the third helical surface and the third mating surface. Similarly, slightly compressing the fourth preload component provides preload force between the fourth helical surface and the fourth mating surface.

[0073] This ensures that there is contact force between the third helical surface and the third mating surface, preventing synchronization failure and increasing the reliability of the synchronization component. Similarly, ensuring that there is contact force between the fourth helical surface and the fourth mating surface also prevents synchronization failure and increases the reliability of the synchronization component.

[0074] In some embodiments, the rotating mechanism further includes a third adjusting member and a fourth adjusting member, both of which are sleeved on the second mounting shaft. The third adjusting member is located between the groove wall of the first mounting groove and the third pre-pressing member, and the fourth adjusting member is located between the second connecting block and the fourth pre-pressing member.

[0075] The position of the third adjusting member in the axial direction of the second mounting shaft can be adjusted so that the third adjusting member moves toward or away from the third preload member; when the third adjusting member moves toward the third preload member, the force applied by the third adjusting member to the third preload member increases, and the preload provided by the third preload member increases; when the third adjusting member moves away from the third preload member, the force applied by the third adjusting member to the third preload member decreases, and the preload provided by the third preload member decreases.

[0076] The position of the fourth adjusting member in the axial direction of the second mounting shaft can be adjusted so that the fourth adjusting member moves toward or away from the fourth preload member; when the fourth adjusting member moves toward the fourth preload member, the force applied by the fourth adjusting member to the fourth preload member increases, and the preload provided by the fourth preload member increases; when the fourth adjusting member moves away from the fourth preload member, the force applied by the fourth adjusting member to the fourth preload member decreases, and the preload provided by the fourth preload member decreases.

[0077] The third adjusting component is a lock nut, and it is threadedly engaged with the second mounting shaft. The third adjusting component abuts against the third preload component. When the third adjusting component is screwed along the first direction, it moves closer to the third preload component, increasing the compression amplitude of the third preload component. This increases the force exerted by the third preload component on the third helical body of the third swing arm. Thus, the preload force between the third helical surface and the third mating surface is increased.

[0078] When the third adjusting component is turned in the second direction, which is opposite to the first direction, for example, the first direction is counterclockwise and the second direction is clockwise, or vice versa. At this time, the third adjusting component moves away from the third pre-compression component, reducing the compression amplitude of the third pre-compression component. This increases the force exerted by the third pre-compression component on the third helical body of the third swing arm. Thus, the preload between the third helical surface and the third mating surface is reduced.

[0079] The fourth adjusting component is a snap ring. When adjusting the position of the fourth adjusting component on the second mounting shaft, the operator manually or with a tool removes the fourth adjusting component from the second mounting shaft. Then, the operator manually or with a tool reinstalls the fourth adjusting component onto the second mounting shaft. At this point, the axial position of the fourth adjusting component on the second mounting shaft changes. If the fourth adjusting component is closer to the fourth preload component than before, that is, if the fourth adjusting component has moved closer to the fourth preload component, the compression amplitude of the fourth preload component increases. This increases the force exerted by the fourth preload component on the fourth helical body of the fourth swing arm. Thus, the preload force between the fourth helical surface and the fourth mating surface is increased.

[0080] If the fourth adjusting member is further away from the fourth preload member than before, that is, if the fourth adjusting member moves away from the fourth preload member, the compression amplitude of the fourth preload member is reduced. At this time, the force exerted by the fourth preload member on the fourth spiral body of the fourth swing arm is reduced. Thus, the preload force between the fourth spiral surface and the fourth mating surface is reduced.

[0081] The preload is adjusted by the third and fourth adjustment components, which allows the synchronization components to better perform their synchronization function.

[0082] In some embodiments, the fourth through hole is a circular hole, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the hole wall in the Y-axis direction is always consistent, without any local protrusions or depressions. Therefore, after machining the fourth through hole, it can be easily demolded, thus realizing the solution of machining the fourth swing arm using a mold.

[0083] In some embodiments, the fourth swing body is a thin plate, and the fourth helical body is a cylindrical shape with an inclined notch (fourth helical opening). The fourth connecting body is approximately S-shaped and connects the fourth swing body and the fourth helical body, facilitating the connection of the fourth swing body to the first fixed plate and the connection of the fourth helical body to the bearing base. This type of fourth swing arm has a simple structure, can be molded using a mold, reduces costs, and improves processing efficiency.

[0084] In some embodiments, the fourth helix includes a fourth inner circumferential surface, a fourth outer circumferential surface, and a fourth end wall surface; the fourth inner circumferential surface is the wall surface of the fourth through hole, and the fourth outer circumferential surface faces away from the fourth inner circumferential surface; the fourth end wall surface connects the fourth inner circumferential surface and the fourth outer circumferential surface, and the fourth through hole penetrates the fourth end wall surface; the opposite sides of the fourth helical surface are respectively connected to the fourth inner circumferential surface and the fourth outer circumferential surface, and the opposite ends of the fourth helical surface are respectively connected to the synchronization body and the fourth end wall surface. The fourth inner circumferential surface, the fourth outer circumferential surface, the fourth end wall surface, the fourth through hole, and the fourth helical surface can all be machined using molds, reducing costs and improving processing efficiency.

[0085] In some embodiments, one of the third and fourth swing arms is provided with a snap-fit ​​groove, and the other of the third and fourth swing arms is provided with a snap-fit ​​block; the snap-fit ​​block snaps into the snap-fit ​​groove. The third and fourth swing arms are detachably connected by the snap-fit ​​groove and the snap-fit ​​block, which has a simple structure, is easy to manufacture, and has a low cost.

[0086] In some embodiments, a resilient buckle is provided on one side of the third swing arm, which is the aforementioned snap-fit ​​block. An inner groove is provided on one side of the fourth swing arm, which is the aforementioned snap-fit ​​groove. The resilient buckle snaps into the inner groove, thereby enabling a detachable connection between the third and fourth swing arms.

[0087] In some embodiments, one side of the third swing arm is provided with alternating third locking slots and third locking blocks, and one side of the fourth swing arm is provided with alternating fourth locking slots and fourth locking blocks; the third locking blocks are engaged in the fourth locking slots, and the fourth locking blocks are engaged in the third locking slots. This makes the structure of the second synchronous swing arm more compact, and the connection between the third and fourth swing arms more reliable.

[0088] In some embodiments, both the third latching block and the third latching slot are trapezoidal in shape, with the long base of the third latching block aligned with the opening of the third latching slot and the short base of the third latching block aligned with the bottom surface of the third latching slot; similarly, both the fourth latching block and the fourth latching slot are trapezoidal in shape, with the long base of the fourth latching block aligned with the opening of the fourth latching slot and the short base of the fourth latching block aligned with the bottom surface of the fourth latching slot. Connecting the third and fourth swing arms allows the third latching block to engage with the fourth latching slot along the Z-axis direction, and simultaneously, the fourth latching block engages with the third latching slot. Because the third and fourth latching slots, the third and fourth latching blocks are all trapezoidal, no relative movement occurs along the Z-axis direction when the third and fourth swing arms move. However, during movement along the X and Y axes, the third latching block is reliably connected within the fourth latching slot and will not disengage from it. Similarly, the fourth locking block is reliably connected within the third locking slot and will not detach from it. This ensures a reliable connection between the third and fourth locking arms while also reducing costs and simplifying manufacturing.

[0089] In some embodiments, the rotating mechanism further includes a first connecting rod, a first damping swing arm, a first sliding member, a second sliding member, and a first elastic member; the first connecting rod is fixedly connected to the bearing base; one side of the first damping swing arm slides and rotates the first fixed plate, and the other side of the first damping swing arm is rotatably connected to the first connecting rod; the first sliding member is slidably connected to the first connecting rod, and the second sliding member is slidably connected to the first connecting rod; the first elastic member is sleeved on the first connecting rod and is located between the first sliding member and the second sliding member; when the first fixed plate rotates relative to the bearing base, the first damping swing arm slides and rotates relative to the first fixed plate, and rotates around the first connecting rod; the first damping swing arm pushes the first sliding member and the second sliding member closer to or further away from each other, so that the first sliding member and the second sliding member synchronously compress or release the two ends of the first elastic member.

[0090] When the first and second sliders approach each other, both ends of the first elastic element are compressed simultaneously. Compared to compression at only one end, the first elastic element can provide double the damping force to the first fixed plate, giving the user a better damping feel. When the first and second sliders move away from each other, both ends of the first elastic element are released simultaneously. Compared to compression at only one end followed by release, this provides double the damping force to the first fixed plate, giving the user a better damping feel.

[0091] In some embodiments, the first damping swing arm includes a first rotating cylinder, a second rotating cylinder, a first concave cam, and a second concave cam; the first rotating cylinder and the second rotating cylinder are arranged at intervals along the length of the rotating mechanism; the first concave cam is fixedly connected to the end of the first rotating cylinder; the second concave cam is fixedly connected to the end of the second rotating cylinder; the first concave cam and the second concave cam are spaced apart and opposite to each other; both the first rotating cylinder and the second rotating cylinder are rotatably connected to a first connecting rod; the first sliding member includes a first slider and a first mating wheel fixedly connected, and the second sliding member includes a second slider and a second mating wheel fixedly connected; both the first slider and the second slider are slidably connected to the first connecting rod; the first concave cam engages with the first mating wheel, and the second concave cam engages with the second mating wheel; the first elastic member abuts between the first slider and the second slider.

[0092] The first concave cam includes multiple first recesses and multiple first protrusions, which are alternately distributed. The second concave cam includes multiple second recesses and multiple second protrusions, which are alternately distributed. The first mating wheel includes multiple first mating recesses and multiple first mating protrusions, which are alternately distributed. The second mating wheel includes multiple second mating recesses and multiple second mating protrusions, which are alternately distributed.

[0093] When the rotating mechanism is in the unfolded state, that is, the first protrusion is located within the first mating recess, and the second protrusion is located within the second mating recess. When the rotating mechanism switches from the unfolded state to the folded state, the first protrusion gradually moves out of the first mating recess, and the second protrusion gradually moves out of the second mating recess. When the rotating mechanism is in the folded state, the ends of the first protrusion of the first concave cam and the first mating protrusion of the first mating wheel abut together. The ends of the second protrusion of the second concave cam and the second mating protrusion of the second mating wheel abut together. As each protrusion moves out of the recess, the first sliding member and the second sliding member move closer to each other, at which time, the two ends of the first elastic member are compressed synchronously.

[0094] In some embodiments, the rotating mechanism further includes a first connecting shaft; the first damping swing arm further includes a first sliding cylinder and a second sliding cylinder, the first sliding cylinder and the second sliding cylinder are arranged at intervals along the length direction of the rotating mechanism, the first fixed plate is provided with a first damping groove and a second damping groove, the first damping groove and the second damping groove are arranged at intervals along the length direction of the rotating mechanism, a first guide block is between the first damping groove and the second damping groove, the first guide block is provided with a first guide groove, the first guide groove is connected to the first damping groove and the second damping groove respectively; the first guide block is located in the interval between the first sliding cylinder and the second sliding cylinder, the first sliding cylinder is located in the first damping groove, and the second sliding cylinder is located in the damping groove; the first connecting shaft passes through the first sliding cylinder, the first guide groove and the second sliding cylinder, and the first connecting shaft can slide and rotate in the first guide groove.

[0095] When the first fixed plate rotates relative to the bearing base, the first connecting shaft slides and rotates within the first guide groove, thereby enabling the first damping swing arm to slide and rotate. This structure also makes the rotating mechanism relatively compact.

[0096] In some embodiments, the rotating mechanism further includes a second connecting rod, a second damping swing arm, and a second elastic member; the second connecting rod is fixedly connected to the bearing base; one side of the second damping swing arm slides and rotates the second fixed plate, and the other side of the second damping swing arm is rotatably connected to the second connecting rod; a first sliding member is slidably connected to the second connecting rod, and a second sliding member is slidably connected to the second connecting rod; the second elastic member is sleeved on the second connecting rod and located between the first sliding member and the second sliding member; when the second fixed plate rotates relative to the bearing base, the second damping swing arm slides and rotates relative to the second fixed plate, and rotates around the second connecting rod; the second damping swing arm pushes the first sliding member and the second sliding member closer to each other or further away from each other, so that the first sliding member and the second sliding member synchronously compress or release the two ends of the second elastic member.

[0097] When the first and second sliders approach each other, both ends of the second elastic element are compressed simultaneously. Compared to compression at only one end, the second elastic element provides double the damping force to the second fixed plate, resulting in a better damping feel for the user. When the first and second sliders move away from each other, both ends of the second elastic element are released simultaneously. Compared to compression at only one end followed by release, this provides double the damping force to the second fixed plate, resulting in a better damping feel for the user.

[0098] In some embodiments, the second damping swing arm includes a third rotating cylinder, a fourth rotating cylinder, a third concave cam, and a fourth concave cam; the third rotating cylinder and the fourth rotating cylinder are arranged at intervals along the length of the rotating mechanism; the third concave cam is fixedly connected to the end of the third rotating cylinder; the fourth concave cam is fixedly connected to the end of the fourth rotating cylinder; the third concave cam and the fourth concave cam are spaced apart and opposite to each other; both the third rotating cylinder and the fourth rotating cylinder are rotatably connected to the second connecting rod; the first sliding member further includes a third mating wheel, which is fixedly connected to the first slider; the second sliding member further includes a fourth mating wheel, which is fixedly connected to the second slider; both the first slider and the second slider are slidably connected to the second connecting rod; the third concave cam meshes with the third mating wheel, and the fourth concave cam meshes with the fourth mating wheel; the second elastic member abuts between the first slider and the second slider.

[0099] The third concave cam includes multiple third concave portions and multiple third protrusions, which are alternately distributed. The fourth concave cam includes multiple fourth concave portions and multiple fourth protrusions, which are alternately distributed. The third mating wheel includes multiple third mating concave portions and multiple third mating protrusions, which are alternately distributed. The fourth mating wheel includes multiple fourth mating concave portions and multiple fourth mating protrusions, which are alternately distributed.

[0100] When the rotating mechanism is in the unfolded state, that is, the third protrusion is located within the third mating recess, and the fourth protrusion is located within the fourth mating recess. When the rotating mechanism switches from the unfolded state to the folded state, the third protrusion gradually moves out of the third mating recess, and the fourth protrusion gradually moves out of the fourth mating recess. When the rotating mechanism is in the folded state, the ends of the third protrusion of the third concave cam and the third mating protrusion of the third mating wheel abut together. The ends of the fourth protrusion of the fourth concave cam and the fourth mating protrusion of the fourth mating wheel abut together. As each protrusion moves out of the recess, the first sliding member and the second sliding member move closer to each other, and at this time, the two ends of the first elastic member are compressed synchronously.

[0101] In some embodiments, the rotating mechanism further includes a second connecting shaft; the second damping swing arm further includes a third sliding cylinder and a fourth sliding cylinder, the third sliding cylinder and the fourth sliding cylinder being arranged at intervals along the length direction of the rotating mechanism; the second fixed plate is provided with a third damping groove and a fourth damping groove, the third damping groove and the fourth damping groove being arranged at intervals along the length direction of the rotating mechanism; a second guide block is located between the third damping groove and the fourth damping groove, the second guide block is provided with a second guide groove, the second guide groove being in communication with the third damping groove and the fourth damping groove respectively; the second guide block is located within the interval between the third sliding cylinder and the fourth sliding cylinder, the third sliding cylinder is located within the third damping groove, and the fourth sliding cylinder is located within the damping groove; the second connecting shaft passes through the third sliding cylinder, the second guide groove and the fourth sliding cylinder, and the second connecting shaft is capable of sliding and rotating within the second guide groove.

[0102] When the second fixed plate rotates relative to the bearing base, the second connecting shaft slides and rotates within the second guide groove, thereby enabling the second damping swing arm to slide and rotate. This structure also makes the rotating mechanism relatively compact.

[0103] In some embodiments, the rotating mechanism further includes a third connecting rod and a third elastic element. The third connecting rod is located between the first connecting rod and the second connecting rod, and both the first sliding element and the second sliding element are slidably connected to the third connecting rod. The third elastic element is sleeved on the third connecting rod, and its two ends abut against the first sliding element and the second sliding element, respectively. When the first sliding element and the second sliding element move closer to or further away from each other, the two ends of the third elastic element are simultaneously compressed or released. The third elastic element can also provide damping force to the first fixed plate and the second fixed plate, thereby providing the user with a better damping feel.

[0104] In some embodiments, the rotating mechanism further includes a fourth connecting rod and a fourth elastic member. The fourth connecting rod is located between the first connecting rod and the second connecting rod. The first sliding member and the second sliding member are both slidably connected to the fourth connecting rod. The fourth elastic member is sleeved on the fourth connecting rod, and the two ends of the fourth elastic member abut against the first sliding member and the second sliding member, respectively. When the first sliding member and the second sliding member approach or move away from each other, the two ends of the fourth elastic member are simultaneously compressed or released.

[0105] In some embodiments, the rotating mechanism further includes a first main swing arm and a second main swing arm; one end of the first main swing arm is slidably and rotatably connected to the bearing base, and the other end of the first main swing arm is rotatably connected to the first fixed plate; one end of the second main swing arm is slidably and rotatably connected to the bearing base, and the other end of the second main swing arm is rotatably connected to the second fixed plate.

[0106] The second aspect of this application provides a foldable electronic device, including: a first housing, a second housing, a display screen, and a rotating mechanism according to any one of the first aspects of this application. The rotating mechanism is connected between the first housing and the second housing, and the display screen is mounted on the first housing, the second housing, and the rotating mechanism. When the rotating mechanism rotates, the first housing and the second housing rotate relative to each other, thereby causing the display screen to bend or unfold.

[0107] In summary, the first synchronous swing arm in this application comprises two parts: a first swing arm and a second swing arm. The detachable connection between the first and second swing arms allows the first synchronous swing arm to perform the same synchronous function as a one-piece swing arm. In the assembled state, the first and second swing arms are detachably connected; when not assembled, they are separate units. Therefore, the first and second swing arms can be processed independently. The dimensions of the first and second swing arms along the length of the rotating mechanism are smaller than those of a one-piece swing arm, thus reducing the processing difficulty, improving processing efficiency, and lowering costs. In particular, after the first and second swing arms are separated, they can be processed using molds, significantly increasing processing efficiency and accuracy compared to traditional CNC machining methods.

[0108] Furthermore, the first through hole in the first swing arm extends along the Y-axis, making it possible to machine the first swing arm using a mold. Specifically, when machining the first swing arm, the raw material is placed in the lower mold, and then the lower mold is driven to engage with the upper mold, causing the upper and lower molds to cooperate in machining the first through hole and the first helical surface. Because the first through hole extends along the Y-axis, the mold can be ejected from the Y-axis direction. Therefore, compared to the structure of an integrated synchronous swing arm that must be machined using CNC machining, this design is easier to manufacture, and the mold machining efficiency is higher, the precision is higher, and the cost is lower. Attached Figure Description

[0109] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0110] Figure 1 This is a schematic diagram of the structure of the foldable electronic device provided in the first state according to the embodiments of this application.

[0111] Figure 2 This is a schematic diagram of the structure of the foldable electronic device provided in the embodiments of this application in the second state.

[0112] Figure 3 yes Figure 2 The diagram shows an exploded view of the foldable electronic device.

[0113] Figure 4 yes Figure 3The diagram shows the structural schematic of the rotating mechanism of the foldable electronic device.

[0114] Figure 5 yes Figure 4 The diagram shows an exploded view of the rotating mechanism.

[0115] Figure 6 yes Figure 4 The diagram shows the structure of the fixed component of the rotating mechanism.

[0116] Figure 7 yes Figure 4 The diagram shows the structural design of the support base for the rotating mechanism.

[0117] Figure 8 yes Figure 4 The diagram shows the structure of the swing arm assembly of the rotating mechanism.

[0118] Figure 9 yes Figure 8 The diagram shows the structure of the first main swing arm of the swing arm assembly shown.

[0119] Figure 10 yes Figure 8 The diagram shows the structure of the second main swing arm of the swing arm assembly.

[0120] Figure 11 yes Figure 4 The diagram shows the structure of the synchronization component of the rotating mechanism.

[0121] Figure 12 yes Figure 11 The diagram shows the split structure of the synchronization component.

[0122] Figure 13 yes Figure 12 The diagram shows the structure of the first synchronizing arm of the synchronizing component.

[0123] Figure 14 yes Figure 12 The diagram shows the structure of the second synchronous swing arm of the synchronization component.

[0124] Figure 15 yes Figure 12 The diagram shows the structure of the synchronization slider of the synchronization component.

[0125] Figure 16 yes Figure 4 The diagram shows the structure of the damping component of the rotating mechanism.

[0126] Figure 17 yes Figure 16 The diagram shows a split structure of the damping component.

[0127] Figure 18 yes Figure 17 The diagram shows the structure of the first damping swing arm of the damping assembly.

[0128] Figure 19 yes Figure 17 The diagram shows the structure of the second damping swing arm of the damping assembly.

[0129] Figure 20 yes Figure 17 A schematic diagram of the structure of the first slider of the damping component shown.

[0130] Figure 21 yes Figure 17 A schematic diagram of the structure of the second slider of the damping component shown.

[0131] Figure 22 yes Figure 4 The diagram shows the structure of the rotating mechanism switching from the unfolded state to the folded state.

[0132] Figure 23 yes Figure 22 Partial cross-sectional view of the rotating mechanism shown.

[0133] Figure 24 yes Figure 4 The diagram shows the rotating mechanism in a folded state.

[0134] Figure 25 yes Figure 23 A partial cross-sectional view of the rotating mechanism shown. Detailed Implementation

[0135] The embodiments of this application are described below with reference to the accompanying drawings.

[0136] Existing foldable electronic devices use rotating mechanisms that include a large number of synchronous gears and other components, resulting in complex structures, difficult assembly, and significant weight and size, which greatly impacts the design of thinner and lighter electronic devices. The rotating mechanism and foldable electronic device provided in this application have fewer synchronous gears and a simpler structure, reducing assembly difficulty, decreasing the weight and size of the rotating mechanism, and facilitating the design of thinner and lighter electronic devices.

[0137] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the foldable electronic device 1000 provided in the embodiments of this application in the first state. Figure 2 This is a schematic diagram of the structure of the foldable electronic device 1000 provided in the embodiments of this application in the second state.

[0138] Figure 1 The foldable electronic device 1000 shown is in a folded state. Figure 2 The foldable electronic device 1000 shown is in the unfolded state. Figure 2 The foldable electronic device 1000 shown has an unfolding angle of 180 degrees. The foldable electronic device 1000 includes, but is not limited to, cellphones, notebook computers, tablet computers, personal digital assistants, wearable devices, or mobile devices. In this embodiment, a cellphone is used as an example for illustration.

[0139] It should be noted that slight deviations are allowed in the angles illustrated in the embodiments of this application. For example, Figure 2 The unfolding angle of the foldable electronic device 1000 shown is 180 degrees, which means it can be exactly 180 degrees, or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles illustrated in the following text can be understood in the same way.

[0140] For ease of description, the width direction of the foldable electronic device 1000 is defined as the X-axis direction, the length direction of the foldable electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the foldable electronic device 1000 is defined as the Z-axis direction. The X-axis, Y-axis, and Z-axis directions are all perpendicular to each other.

[0141] Please see Figure 3 , Figure 3 yes Figure 2 The diagram shows an exploded view of the foldable electronic device.

[0142] A foldable electronic device 1000 includes a main body 200 and a display screen 300, the display screen 300 being mounted on the main body 200. The display screen 300 includes a display surface and a mounting surface, which are disposed opposite to each other. The display surface is used to display text, images, and videos, etc. The display screen 300 includes a first display portion 310, a second display portion 320, and a third display portion 330. The third display portion 330 is located between the first display portion 310 and the second display portion 320, and the third display portion 330 is flexible and can be bent along the X-axis direction. In this embodiment, the display screen 300 is a flexible display screen. The first display portion 310 and the second display portion 320 are also actually bendable when not fixed.

[0143] In this embodiment, the display screen 300 is a flexible display screen, such as an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen.

[0144] The main body 200 includes a first housing 210, a second housing 220, and a rotating mechanism 100. The first housing 210 has a first receiving groove (not shown), and the second housing 220 has a second receiving groove (not shown). The first receiving groove and the second receiving groove are connected to form a receiving groove. The rotating mechanism 100 is installed in the receiving groove and is fixedly connected to the first housing 210 and the second housing 220 to realize the rotatable connection between the first housing 210 and the second housing 220. The first housing 210 and the second housing 220 can rotate relative to each other through the rotating mechanism 100, so that the main body 200 can switch between a folded state and an unfolded state.

[0145] The side of the first housing 210 and the second housing 220 facing away from the display screen 300 is the outer surface of the electronic device, and the side that supports the display screen 300 is the inner side. In fact, the inner side of the first housing 210 and the second housing 220 is provided with a support part, and the display screen is mounted on the support part and supports the flexible display screen 300.

[0146] The display screen 300 is mounted on the main body 200, and the mounting surface is fixedly connected to the main body 200. Specifically, the first housing 210 carries the first display portion 310, and the second housing 220 carries the second display portion 320. In other words, the first display portion 310 is mounted on the first housing 210, and the second display portion 320 is mounted on the second housing 220. The rotating mechanism 100 is positioned opposite to the third display portion 330 to enable the display screen 300 to bend.

[0147] The relative rotation of the first housing 210 and the second housing 220 causes the main body 200 to be in a folded state. This means that the first housing 210 and the second housing 220 rotate through the rotating mechanism 100 and move closer to each other, with the surfaces of the first housing 210 and the second housing 220 that support the display screen 300 facing each other. In application, when the main body 200 is fully folded, the display screen 300 mounted on the first housing 210 and the second housing 220 is folded, and the display surfaces of the first display portion 310 and the second display portion 320 are in partial or complete contact. The relative rotation of the first housing 210 and the second housing 220 causes the main body 200 to be in a semi-open state during unfolding (the first housing 210 and the second housing 220 can remain at any angle, such as a 90-degree angle or a 120-degree angle between them). The first housing 210 and the second housing 220 rotate via the rotating mechanism 100 and move away from each other, with the included angle between them gradually increasing until the relative rotation of the first housing 210 and the second housing 220 flattens the main body 200 into an unfolded state. The included angle between the first housing 210 and the second housing 220 can be close to or equal to 180 degrees. The first housing 210 and the second housing 220 are roughly in a flat state. Simultaneously, the relative movement of the first housing 210 and the second housing 220 causes the display screen 300 to unfold until the foldable electronic device 1000 is in an unfolded state. Furthermore, the relative movement of the first housing 210 and the second housing 220 causes the display screen 300 to unfold further until the foldable electronic device 1000 is in an unfolded state.

[0148] The first housing 210, the second housing 220, and the rotating mechanism 100 are arranged sequentially along the X-axis, and the sum of their dimensions equals the dimension of the main body 200 in the X-axis direction (including assembly tolerances and assembly gaps between them). The dimension of the main body 200 in the X-axis direction is the same as the dimension of the display screen 300 and the electronic device in the X-axis direction; this sameness includes allowable tolerance ranges. The dimensions of the first housing 210, the second housing 220, and the rotating mechanism 100 are the same along the Y-axis direction; this sameness allows for assembly or manufacturing tolerances. The dimension of the first housing 210, the second housing 220, and the rotating mechanism 100 along the Y-axis direction is the same as the dimension of the main body 200 in the Y-axis direction, and this dimension is the same as the dimension of the display screen 300 and the foldable electronic device 1000 in the Y-axis direction. Of course, this sameness also allows for minor deviations (assembly and manufacturing tolerances).

[0149] See Figure 2 and Figure 3The first housing 210 and the second housing 220 rotate relative to each other via the rotating mechanism 100. When the foldable electronic device 1000 is in the unfolded state, the display screen 300 has a large display area, enabling the foldable electronic device 1000 to display and operate on a large screen, thus improving the user experience. (See also...) Figure 1 When the foldable electronic device 1000 is in the folded state, the display screen 300 is located between the first housing 210 and the second housing 220. The first housing 210 and the second housing 220 protect the display surface of the display screen 300, which can greatly reduce the probability of the display screen 300 being damaged, and the overall size is reduced, making it easy to carry.

[0150] It should be noted that the directional terms such as "top," "bottom," "left," "right," "front," and "rear" used in the description of the foldable electronic device 1000 in this application are mainly based on the attached diagram of the foldable electronic device 1000. Figure 2 and Figure 4 The orientation of the device is described in the diagram, with the positive Z-axis direction as "top" or "up", the negative Z-axis direction as "bottom" or "down", the positive X-axis direction as "right", the negative X-axis direction as "left", the positive Y-axis direction as "back", and the negative Y-axis direction as "front". This does not constitute a limitation on the orientation of the foldable electronic device 1000 in actual application scenarios.

[0151] See Figure 4 and Figure 5 , Figure 4 yes Figure 3 The diagram shows the structural schematic of the rotating mechanism of the foldable electronic device. Figure 5 yes Figure 4 The diagram shows an exploded view of the rotating mechanism.

[0152] The rotating mechanism 100 includes a fixed component 10, a support base 20, a swing arm assembly 30, a synchronization component 40, and a damping component 50. The swing arm assembly 30, synchronization component 40, and damping component 50 are arranged at intervals along the Y-axis. One side of the swing arm assembly 30 is slidably and rotatably connected to the support base 20, and the other side of the swing arm assembly 30 is rotatably connected to the fixed component 10. One side of the synchronization component 40 is rotatably connected to the support base 20, and the other side of the synchronization component 40 is slidably and rotatably connected to the fixed component 10. One side of the damping component 50 is rotatably connected to the support base 20, and the other side of the damping component 50 is slidably and rotatably connected to the fixed component 10.

[0153] The fixing component 10 is connected to the first housing 210 and the second housing 220 respectively. When the fixing component 10 rotates relative to the support base 20, it drives the swing arm component 30 to slide and rotate relative to the support base 20, and also drives the synchronization component 40 and the damping component 50 to rotate relative to the support base 20, thereby realizing the rotation of the rotating mechanism 100 to achieve the bending of the display screen 300. The synchronization component 40 enables the fixing component 10 to rotate synchronously, thereby enabling the first housing 210 and the second housing 220 to operate synchronously. The damping component 50 provides damping force during the rotation of the rotating mechanism 100.

[0154] It should be noted that, Figure 4 and Figure 5 Only a portion of the rotating mechanism 100 along the positive Y-axis is shown. The fixing component 10, the swing arm component 30, the synchronization component 40, and the damping component 50 form a group of substructures. The entire rotating mechanism 100 has at least two groups of the above-mentioned substructures. In other words, a group of the above-mentioned substructures is provided on both the front and rear sides of the bearing base 20. In other embodiments, an additional substructure is provided between the two groups of substructures, and the added substructure is located in the middle of the bearing base 20, thereby enhancing the stability of the rotating mechanism 100. In other embodiments, one, four, or five groups of the above-mentioned substructures may also be provided. The number of the substructures can be adjusted according to the actual situation. In one embodiment, the fixing component 10 of the two groups of the above-mentioned substructures can be integrally formed, that is, the synchronization component 40, the damping component 50, and the swing arm component 30 of the two groups of substructures are all connected to the same fixing component 10.

[0155] In one of the above substructures, the fixing component 10 is installed within a receiving groove formed by the first receiving groove of the first housing 210 and the second receiving groove of the second housing 220. Specifically, the first fixing plate 11 is located within the first receiving groove and is fixedly connected to the cavity wall of the first receiving groove. The second fixing plate 12 is located within the second receiving groove and is fixedly connected to the cavity wall of the second receiving groove.

[0156] The fixing assembly 10 includes a first fixing plate 11 and a second fixing plate 12, which are located on opposite sides of the support base 20. The swing arm assembly 30 includes a first main swing arm 31 and a second main swing arm 32. The first fixing plate 11 is located on one side of the support base 20, and the second fixing plate 12 is located on the other side of the support base 20. One side of the first main swing arm 31 is slidably and rotatably connected to the support base 20, and the other side of the first main swing arm 31 is rotatably connected to the first fixing plate 11. One side of the second main swing arm 32 is slidably and rotatably connected to the support base 20, and the other side of the second main swing arm 32 is rotatably connected to the second fixing plate 12.

[0157] The synchronization component 40 includes a first synchronization swing arm 41, a second synchronization swing arm 42, and a synchronization slider 43. The first synchronization swing arm 41 includes a first swing arm 41a and a second swing arm 41b, and the second synchronization swing arm 42 includes a third swing arm 42a and a fourth swing arm 42b.

[0158] One side of the first swing arm 41a and one side of the second swing arm 41b are slidably and rotatably connected to the support base 20. The other side of the first swing arm 41a and the other side of the second swing arm 41b are rotatably connected to the first fixed plate 11. One side of the third swing arm 42a and one side of the fourth swing arm 42b are slidably and rotatably connected to the support base 20. The other side of the third swing arm 42a and the fourth swing arm 42b are rotatably connected to the second fixed plate 12. The synchronous slider 43 is installed on the support base 20. One side of the synchronous slider 43 is rotatably connected to the first swing arm 41a and the second swing arm 41b. The other side of the synchronous slider 43 is rotatably connected to the third swing arm 42a and the fourth swing arm 42b.

[0159] The damping assembly 50 includes a first damping swing arm 51, a second damping swing arm 52, a first sliding member 53, a second sliding member 54, and an elastic component 55. One side of the first damping swing arm 51 is rotatably connected to the bearing base 20, and the other side of the first damping swing arm 51 is rotatably and slidably connected to the first fixed plate 11. One side of the second damping swing arm 52 is rotatably connected to the bearing base 20, and the other side of the second damping swing arm 52 is rotatably and slidably connected to the second fixed plate 12. The first sliding member 53, the second sliding member 54, and the elastic component 55 are mounted on the bearing base 20.

[0160] During rotation, the damping component 50 provides damping force to give users a better damping feel, while also enabling the foldable electronic device to hover at a preset angle, thereby improving the user experience. Here, "preset angle" refers to the angle between the first housing 210 and the second housing 220 when the foldable electronic device is hovering, that is, the angle between the first fixing plate 11 and the second fixing plate 12. The preset angle ranges from 0 to 180°.

[0161] In this embodiment, when the first fixed plate 11 rotates relative to the bearing base 20, the first main swing arm 31 rotates relative to the first fixed plate 11, and slides and rotates relative to the bearing base 20. The first swing arm 41a and the second swing arm 41b slide and rotate relative to the first fixed plate 11, and rotate relative to the bearing base 20. The first damping swing arm 51 slides and rotates relative to the first fixed plate 11, and rotates relative to the bearing base 20; the second damping swing arm 52 slides and rotates relative to the second fixed plate 12, and rotates relative to the bearing base 20. The first damping swing arm 51 and the second damping swing arm 52 cause the first sliding member 53 and the second sliding member 54 to move closer to or further apart from each other along the Y-axis. When the first sliding member 53 and the second sliding member 54 move closer to each other, the two ends of the elastic component 55 are simultaneously compressed by the first sliding member 53 and the second sliding member 54; when the first sliding member 53 and the second sliding member 54 move further apart, the two ends of the elastic component 55 are simultaneously released by the first sliding member 53 and the second sliding member 54, so that the elastic component 55 provides damping force to the first fixed plate 11. When the second fixed plate 12 rotates relative to the bearing base 20, the second main swing arm 32 rotates relative to the second fixed plate 12, and slides and rotates relative to the bearing base 20. The third swing arm 42a and the fourth swing arm 42b slide and rotate relative to the second fixed plate 12, and rotate relative to the bearing base 20. The first slider 53 and the second slider 54 move along the Y-axis to move closer to or further away from each other. When the first slider 53 and the second slider 54 move closer to each other, both ends of the elastic component 55 are simultaneously compressed by the first slider 53 and the second slider 54. When the first slider 53 and the second slider 54 move further away from each other, both ends of the elastic component 55 are simultaneously released by the first slider 53 and the second slider 54, so that the elastic component 55 provides damping force to the second fixed plate 12. The damping force allows the user to experience a better feel, thereby improving the user experience. The synchronous slider 43 ensures the synchronicity of the first synchronous swing arm 41 and the second synchronous swing arm 42, so as to achieve the synchronicity of the rotation of the first fixed plate 11 and the second fixed plate 12, and thus achieve the synchronicity of the rotation of the first housing and the second housing.

[0162] See Figure 6 , Figure 6 yes Figure 4 The diagram shows the structure of the fixing component 10 of the rotating mechanism 100 shown.

[0163] The first fixing plate 11 is elongated, with its length parallel to the Y-axis. The first fixing plate 11 includes a first top surface 11a, a first bottom surface 11b, a first side surface 11c, a second side surface 11d, a first end surface 11f, and a second end surface 11g. The first top surface 11a and the first bottom surface 11b are positioned opposite each other along the Z-axis, the first side surface 11c and the second side surface 11d are positioned opposite each other along the X-axis, and the first end surface 11f and the second end surface 11g are positioned opposite each other along the Y-axis. The first side surface 11c, the second side surface 11d, the first end surface 11f, and the second end surface 11g are connected sequentially end-to-end, and all three are connected between the first top surface 11a and the first bottom surface 11b.

[0164] The first fixed plate 11 is provided with a first rotating groove 111, a first synchronous sliding groove 112, a first damping sliding groove 113, a second damping sliding groove 114, and a first clearance groove 117. The first rotating groove 111, the first synchronous sliding groove 112, the first damping sliding groove 113, and the second damping sliding groove 114 are distributed at intervals along the Y-axis direction. The first clearance groove 117 is located on one side of the first damping sliding groove 113 and the second damping sliding groove 114 along the X-axis direction.

[0165] The first rotating groove 111 penetrates the first top surface 11a, the first bottom surface 11b, and the first side surface 11c, that is, the first rotating groove 111 penetrates the first fixing plate 11 along the Z-axis direction. The two sides of the first rotating groove 111 are respectively provided with a first fixing hole 118 and a second fixing hole. The axial directions of both the first fixing hole 118 and the second fixing hole are parallel to the Y-axis direction, and the first fixing hole 118 and the second fixing hole are coaxial. The first fixing hole 118 penetrates the first end face 11f to facilitate the installation of the shaft of the first main swing arm 31. The first rotating groove 111 is used to install the first main swing arm 31, and the first fixing hole 118 and the second fixing hole are used to connect the first main swing arm 31.

[0166] The first synchronous slide groove 112 passes through the first side 11c and the second side 11d, that is, the first synchronous slide groove 112 passes through the first fixed plate 11 along the X-axis direction. The first synchronous slide groove 112 is used to install the first swing arm 41a and the second swing arm 41b.

[0167] The first damping groove 113 is formed by a recess from the first top surface 11a towards the first bottom surface 11b, and at least a portion of the first damping groove 113 penetrates the first bottom surface 11b. The second damping groove 114 is also formed by a recess from the first top surface 11a towards the first bottom surface 11b, and at least a portion of the second damping groove 114 penetrates the first bottom surface 11b. A first guide slide 115 is formed by the gap between the first damping groove 113 and the second damping groove 114. The first guide slide 115 has a first guide groove 116 extending along the Y-axis direction, and the extension direction of the first guide groove 116 is parallel to the X-axis direction. The first guide groove 116 communicates with the first damping groove 113 and the second damping groove 114. The first clearance groove 117 penetrates the first top surface 11a, the first bottom surface 11b, and the first side surface 11c. The first clearance groove 117 communicates with the first damping groove 113, the second damping groove 114, and the first guide groove 116. The length of the first clearance groove 117 along the Y-axis is greater than the sum of the dimensions of the first damping groove 113, the second damping groove 114, and the first guide groove 116. The first guide slider 115 extends at least partially into the first clearance groove 117, so that the first guide groove 116 and the first clearance groove 117 communicate along the Y-axis. The first damping groove 113 and the first clearance groove 117 are sequentially distributed and communicate along the X-axis, as are the second damping groove 114 and the first clearance groove 117. The first damping groove 113 and the second damping groove 114 are used to mount the first damping swing arm 51, and the first guide groove 116 is used to connect the first damping swing arm 51. The first clearance groove 117 facilitates the connection of the first damping swing arm 51.

[0168] The structure of the second fixing plate 12 is similar to that of the first fixing plate 11. The second fixing plate 12 is elongated, and its length direction is parallel to the Y-axis direction. The second fixing plate 12 includes a second top surface 12a, a second bottom surface 12b, a third side surface 12c, a fourth side surface 12d, a third end surface 12f, and a fourth end surface 12g. The second top surface 12a and the second bottom surface 12b are arranged opposite to each other along the Z-axis direction, the third side surface 12c and the fourth side surface 12d are arranged opposite to each other along the X-axis direction, and the third end surface 12f and the fourth end surface 12g are arranged opposite to each other along the Y-axis direction. The third side surface 12c, the fourth side surface 12d, the third end surface 12f, and the fourth end surface 12g are connected sequentially end to end, and all three are connected between the second top surface 12a and the second bottom surface 12b.

[0169] The second fixed plate 12 is provided with a second rotating groove 121, a second synchronous sliding groove 122, a third damping sliding groove 123, a fourth damping sliding groove 124, and a second clearance groove 127.

[0170] The second rotating groove 121, the second synchronous sliding groove 122, the third damping sliding groove 123, and the fourth damping sliding groove 124 are distributed at intervals along the Y-axis direction. The second rotating groove 121 penetrates the second top surface 12a, the second bottom surface 12b, and the third side surface 12c, that is, the second rotating groove 121 penetrates the second fixing plate 12 along the Z-axis direction. The two sides of the second rotating groove 121 are respectively provided with a third fixing hole 128 and a fourth fixing hole. The axial directions of the third fixing hole 128 and the fourth fixing hole are both parallel to the Y-axis direction, and the third fixing hole 128 and the fourth fixing hole are coaxial. The third fixing hole 128 penetrates the third end face 12f to facilitate the installation of the shaft of the second main swing arm 32. The second rotating groove 121 is used to install the second main swing arm 32, and the third fixing hole 128 and the fourth fixing hole are used to connect the second main swing arm 32.

[0171] The second synchronous slide groove 122 passes through the third side 12c and the fourth side 12d, that is, the second synchronous slide groove 122 passes through the second fixed plate 12 along the X-axis direction. The second synchronous slide groove 122 is used to install the third swing arm 42a and the fourth swing arm 42b.

[0172] The third damping groove 123 is formed by a recess from the second top surface 12a to the second bottom surface 12b, and at least partially penetrates the second bottom surface 12b. The fourth damping groove 124 is formed by a recess from the second top surface 12a to the second bottom surface 12b, and at least partially penetrates the second bottom surface 12b. A second guide slide 125 is formed between the third damping groove 123 and the fourth damping groove 124. The second guide slide 125 has a second guide groove 126 extending along the Y-axis direction, and the extension direction of the second guide groove 126 is parallel to the X-axis direction. The second guide groove 126 communicates with the third damping groove 123 and the fourth damping groove 124. The second clearance groove 127 penetrates the second top surface 12a, the second bottom surface 12b, and the second side surface 11d. The second clearance groove 127 communicates with the third damping groove 123, the fourth damping groove 124, and the second guide groove 126. The length of the second clearance groove 127 along the Y-axis is greater than the sum of the dimensions of the third damping groove 123, the fourth damping groove 124, and the second guide groove 126. The second guide slider 125 extends at least partially into the second clearance groove 127, so that the second guide groove 126 and the second clearance groove 127 communicate along the Y-axis. The third damping groove 123 and the second clearance groove 127 are sequentially distributed and communicate along the X-axis, as are the fourth damping groove 124 and the second clearance groove 127. The third damping groove 123 and the fourth damping groove 124 are used to mount the third damping swing arm, and the second guide groove 126 is used to connect the third damping swing arm. The second clearance groove 127 facilitates the connection of the second damping swing arm 52.

[0173] See Figure 7 , Figure 7 yes Figure 4The diagram shows the structure of the support base 20 of the rotating mechanism 100 shown.

[0174] The support base 20 is elongated, and its length direction is parallel to the Y-axis. The support base 20 can be a single-piece structure, or it can include a support body 20a and multiple mounting blocks 20b. The support body 20a has a recessed groove, the extension direction of which is parallel to the Y-axis. Multiple mounting blocks 20b are fixed within the recessed groove to form the support base 20.

[0175] The support base 20 includes a first base and a second base, which are arranged sequentially along the Y-axis. The first base is located on the front side of the support base 20, and the second base is located on the rear side of the support base 20.

[0176] It should be noted that the first and second base parts can be mirror-symmetrical to improve the symmetry of the support base 20, simplify its overall structure, enhance its structural stability, and reduce its manufacturing cost. The basic structure of each component in the second base part, the connection relationships between components, and the connection relationships between components and other components outside the assembly can all refer to the relevant description of the first base part.

[0177] The first base and the second base each connect to one set of the aforementioned substructures. In other embodiments, the first base and the second base may also connect to two sets of the aforementioned substructures respectively. Alternatively, the first base and the second base may jointly connect to three sets of the aforementioned substructures. Those skilled in the art can configure the system according to actual needs.

[0178] Figure 7 The diagram shown is a structural schematic of the first part of the support base 20.

[0179] The first part of the support base 20 includes a support top surface 20c, a support bottom surface 20d, a first support side surface 20e, and a second support side surface 20f. The support top surface 20c and the support bottom surface 20d are opposite to each other along the Z-axis, and the first support side surface 20e and the second support side surface 20f are opposite to each other along the X-axis. The first support side surface 20e connects one side of the support top surface 20c and the support bottom surface 20d, and the second support side surface 20f connects the other side of the support top surface 20c and the support bottom surface 20d.

[0180] The support base 20 is provided with a first main slide groove 21, a second main slide groove 22, a first mounting groove 23, and a second mounting groove 24 arranged sequentially at intervals along the Y-axis. The first main slide groove 21 and the second main slide groove 22 are opposite to each other in the X-axis direction and staggered in the Y-axis direction.

[0181] The first main slide groove 21 is recessed in the direction of the bearing bottom surface 20d and extends through the second bearing side surface 20f. At least a portion of the bottom surface of the first main slide groove 21 is arc-shaped, and the arc-shaped portion of the bottom surface of the first main slide groove 21 extends parallel to the X-axis direction. The arc-shaped portion of the bottom surface of the second main slide groove 22 facilitates the sliding of the first main swing arm 31 relative to the bearing base 20. A first stop block 211 is provided on the bottom surface of the first main slide groove 21, and the first stop block 211 protrudes relative to the bottom surface of the first main slide groove 21. A first limiting block 212 and a second limiting block 213 are respectively provided on two opposite sides of the first main slide groove 21 along the X-axis direction. The first limiting block 212 protrudes relative to one side surface of the first main slide groove 21. The first limiting block 212 is located inside the first main slide groove 21 and is spaced from the bottom surface of the first main slide groove 21. The second limiting block 213 protrudes relative to the other side surface of the first main slide groove 21. The second limiting block 213 is located within the first main slide groove 21 and is spaced apart from the bottom surface of the first main slide groove 21. The first main slide groove 21 is used to install the first main swing arm 31. The first stop block 211, the first limiting block 212, and the second limiting block 213 are used to limit the first main swing arm 31, preventing the first main swing arm 31 from sliding relative to the bearing base 20 and from disengaging from the bearing base 20 when rotating.

[0182] The second main slide groove 22 is recessed from the top bearing surface 20c towards the bottom bearing surface 20d and extends through the first bearing side surface 20e. At least a portion of the bottom surface of the second main slide groove 22 is arc-shaped, and the arc-shaped portion of the bottom surface of the second main slide groove 22 extends parallel to the X-axis direction. The arc-shaped portion of the bottom surface of the second main slide groove 22 facilitates the sliding of the second main swing arm 32 relative to the bearing base 20. A second stop block 221 is provided on the bottom surface of the second main slide groove 22, and the second stop block 221 protrudes relative to the bottom surface of the second main slide groove 22. A third limiting block 222 and a fourth limiting block 223 are respectively provided on two opposite sides of the second main slide groove 22 along the X-axis direction, and the third limiting block 222 protrudes relative to one side surface of the second main slide groove 22. The third limiting block 222 is located inside the second main slide groove 22 and is spaced apart from the bottom surface of the second main slide groove 22. The fourth limiting block 223 protrudes from the other side of the second main slide groove 22. The fourth limiting block 223 is located inside the second main slide groove 22 and is spaced apart from the bottom surface of the second main slide groove 22. The second main slide groove 22 is used to install the second main swing arm 32. The second stop block 221, the third limiting block 222 and the fourth limiting block 223 are used to limit the second main swing arm 32 to prevent it from sliding relative to the bearing base 20 and from disengaging from the bearing base 20 when rotating.

[0183] The first mounting groove 23 is recessed from the top surface 20c towards the bottom surface 20d, and extends through the first side surface 20e and the second side surface 20f. One side surface of the first mounting groove 23 has a first mounting hole 231 and a third mounting hole 232, and the other side surface has a second mounting hole and a fourth mounting hole. The axial directions of the first mounting hole 231, the second mounting hole, the third mounting hole 232, and the fourth mounting hole are all parallel to the Y-axis. The first mounting hole 231 is coaxial with the second mounting hole, and the third mounting hole 232 is coaxial with the fourth mounting hole. Part of the side surface of the first mounting groove 23 is located on the support body 20a, and another part of the side surface is located on a mounting block 20b that mates with the support body 20a. The mounting block 20b is detachably connected to the support body 20a. The second and fourth mounting holes are formed by the mounting block 20b and the support body 20a. The first mounting hole 231, the second mounting hole, the third mounting hole 232, and the fourth mounting hole are used to connect the synchronization assembly 40.

[0184] The bottom surface of the first mounting groove 23 is provided with a guide strip 233. The guide strip 233 protrudes from the bottom surface of the first mounting groove 23, and its length direction is parallel to the Y-axis direction. The two opposite ends of the guide strip 233 are respectively connected to two opposite sides of the first mounting groove 23 along the X-axis direction. The first mounting groove 23 is used to mount the first synchronous swing arm 41, the second synchronous swing arm 42, and the synchronous slider 43. The first mounting hole 231 and the second mounting hole are used to connect the first synchronous swing arm 41 and the synchronous slider 43, and the third mounting hole 232 and the fourth mounting hole are used to connect the second synchronous swing arm 42 and the synchronous slider 43. The guide strip 233 is used to guide the movement of the synchronous slider 43 along the Y-axis direction, preventing the synchronous slider 43 from wobbling when moving along the Y-axis direction, so as to make the movement of the synchronous slider 43 more stable.

[0185] The second mounting groove 24 is recessed from the top surface 20c towards the bottom surface 20d, and extends through the first and second supporting side surfaces 20e and 20f. One side of the second mounting groove 24 has a first fastening hole 242 and a third fastening hole 243, and the other side has a second and a fourth fastening hole. The axial directions of the first, second, third, and fourth fastening holes are all parallel to the Y-axis. The first and second fastening holes are coaxial, and the third and fourth fastening holes are coaxial. The first fastening hole 242 communicates with the first mounting hole 231; that is, the first fastening hole 242 and the first mounting hole 231 can be a through hole formed by the mounting block 20b and the supporting body 20a. The third fastening hole 243 communicates with the third mounting hole 232, meaning that the third fastening hole 243 and the third mounting hole 232 can be a through hole formed by the mounting block 20b and the bearing body 20a. The first fastening hole 242, the second fastening hole, the third fastening hole 243, and the fourth fastening hole are used to connect the damping assembly 50.

[0186] The bottom surface of the second mounting groove 24 is provided with a guide strip 241. The guide strip 241 protrudes from the bottom surface of the second mounting groove 24, and its length direction is parallel to the Y-axis direction. The two opposite ends of the guide strip 241 are respectively connected to two opposite sides of the second mounting groove 24 along the X-axis direction. The second mounting groove 24 is used to install the damping assembly 50, that is, to install the first damping swing arm 51, the second damping swing arm 52, the first sliding member 53, the second sliding member 54, and the elastic assembly 55. The guide strip 241 is used to guide the movement of the first sliding member 53 and the second sliding member 54 along the Y-axis direction, preventing wobbling when the first sliding member 53 and the second sliding member 54 move along the Y-axis direction, so as to make the movement of the first sliding member 53 and the second sliding member 54 more stable.

[0187] See Figure 8 , Figure 8 yes Figure 4 The diagram shows the structure of the swing arm assembly 30 of the rotating mechanism 100 shown.

[0188] As mentioned above, the swing arm assembly 30 includes a first main swing arm 31 and a second main swing arm 32. In this embodiment, the swing arm assembly 30 also includes a first fixed shaft 33 and a second fixed shaft 34.

[0189] refer to Figure 9 and combined Figure 8 , Figure 9 yes Figure 8 The diagram shows the structure of the first main swing arm 31 of the swing arm assembly 30.

[0190] The first main swing arm 31 includes a first main rotating body 311 and a first main sliding body 312 arranged along the X-axis. In this embodiment, the first main sliding body 312 is fixedly connected to the first main rotating body 311.

[0191] The first main rotating body 311 is generally a rectangular thin plate structure. The first main rotating body 311 is provided with a first through hole 313. The axis of the first through hole 313 is parallel to the Y-axis direction, and the first through hole 313 passes through the first main rotating body 311 along the Y-axis direction. The first main rotating body 311 is used to cooperate with the first fixed plate 11, and the first through hole 313 is used to connect with the first fixed plate 11.

[0192] The first main sliding body 312 has a first sliding surface 314, which is arc-shaped. A first stop groove 315 is provided on the first sliding surface 314, formed by a recess in the first sliding surface 314. One side of the first stop groove 315 is a first stop surface, extending parallel to the Y-axis direction. The first stop surface engages with a first stop block 211 within the first main sliding groove 21 of the bearing base 20 to prevent the first main swing arm 31 from disengaging from the first main sliding groove 21. The first main sliding body 312 includes a first body 316, a first mating block 317, and a second mating block 318. The first mating block 317 and the second mating block 318 are fixedly connected to the two opposite sides of the first body 316 along the Y-axis direction. Both the first mating block 317 and the second mating block 318 are arc-shaped blocks, with the side surface of the first mating block 317 and the second mating block 318 facing away from the first sliding surface 314 recessed relative to the first body 316.

[0193] The first main sliding body 312 is used to cooperate with the bearing base 20, and the arc-shaped first sliding surface 314 is used to cooperate with the arc-shaped part of the bottom surface of the first main sliding groove 21, so that the first main swing arm 31 can slide and rotate smoothly. The first stop groove 315 is used to cooperate with the first stop block 211, the first mating block 317 is used to cooperate with the first limiting block 212, and the second mating block 318 is used to cooperate with the second limiting block 213, so as to prevent the first main sliding body 312 from disengaging from the bearing base 20 when the first main swing arm 31 slides and rotates.

[0194] refer to Figure 10 and combined Figure 8 , Figure 10 yes Figure 8 A schematic diagram of the structure of the second main swing arm 32 of the swing arm assembly 30 shown.

[0195] The second main swing arm 32 has the same structure as the first main swing arm 31. The second main swing arm 32 includes a second main rotating body 321 and a second main sliding body 322 arranged along the X-axis. In this embodiment, the second main sliding body 322 is fixedly connected to the second main rotating body 321.

[0196] The second main rotating body 321 is generally a rectangular thin plate structure. The second main rotating body 321 is provided with a second through hole 323. The axis of the second through hole 323 is parallel to the Y-axis direction, and the second through hole 323 passes through the second main rotating body 321 along the Y-axis direction. The second main rotating body 321 is used to cooperate with the second fixed plate 12, and the second through hole 323 is used to connect with the second fixed plate 12.

[0197] The second main sliding body 322 has a second sliding surface 324, which is arc-shaped. A second stop groove 325 is provided on the second sliding surface 324, formed by a recess in the second sliding surface 324. One side of the second stop groove 325 is a second stop surface, extending parallel to the Y-axis direction. The second stop surface engages with a second stop block 221 within the second main sliding groove 22 of the bearing base 20 to prevent the second main swing arm 32 from disengaging from the second main sliding groove 22. The second main sliding body 322 includes a second body 326, a third mating block 327, and a fourth mating block 328. The third mating block 327 and the fourth mating block 328 are fixedly connected to the two opposite sides of the second body 326 along the Y-axis direction. Both the third mating block 327 and the fourth mating block 328 are arc-shaped blocks, with the side surface of the third mating block 327 and the fourth mating block 328 facing away from the second sliding surface 324 recessed relative to the second body 326.

[0198] The second main sliding body 322 is used to cooperate with the bearing base 20, and the arc-shaped second sliding surface 324 is used to cooperate with the arc-shaped part of the bottom surface of the second main sliding groove 22, so that the second main swing arm 32 can slide and rotate smoothly. The second stop groove 325 is used to cooperate with the second stop block 221, the third mating block 327 is used to cooperate with the third limiting block 222, and the fourth mating block 328 is used to cooperate with the fourth limiting block 223, so as to prevent the second main sliding body 322 from disengaging from the bearing base 20 when the second main swing arm 32 slides and rotates.

[0199] At least a portion of the first fixed shaft 33 is located within the first through hole 313 of the first main rotating body 311, and both ends of the first fixed shaft 33 are respectively used to connect with the first fixed hole 118 and the second fixed hole, so that the first main swing arm 31 is rotatably connected to the first fixed plate 11. At least a portion of the second fixed shaft 34 is located within the second through hole 323 of the second main rotating body 321, and both ends of the second fixed shaft 34 are respectively used to connect with the third fixed hole 128 and the fourth fixed hole, so that the second main swing arm 32 is rotatably connected to the second fixed plate 12.

[0200] See Figure 11 and Figure 12 , Figure 11 yes Figure 4 A schematic diagram of the structure of the synchronization component 40 of the rotating mechanism 100 shown. Figure 12 yes Figure 11 The diagram shows the split structure of the synchronization component 40.

[0201] As mentioned above, the synchronization component 40 includes a first synchronization arm 41, a second synchronization arm 42, and a synchronization slider 43. The first synchronization arm 41 includes a first arm 41a and a second arm 41b, and the second synchronization arm 42 includes a third arm 42a and a fourth arm 42b.

[0202] In this embodiment, the synchronization component 40 further includes a first mounting shaft 44a, a second mounting shaft 44b, a first preload member 45a, a second preload member 45b, a third preload member 45c, a fourth preload member 45d, a first adjusting member 46a, a third adjusting member 46b, a second adjusting member 47a, and a fourth adjusting member 47b. The first preload member 45a, the second preload member 45b, the third preload member 45c, and the fourth preload member 45d can all be disc springs or wave springs.

[0203] The first adjusting member 46a, the third adjusting member 46b, the second adjusting member 47a, and the fourth adjusting member 47b can all be nuts or snap rings, or partly nuts and partly snap rings. For example, the first adjusting member 46a and the fourth adjusting member 47b can be nuts, and the second adjusting member 47a and the third adjusting member 46b can be snap rings. In this embodiment, the first adjusting member 46a and the third adjusting member 46b are nuts, and the second adjusting member 47a and the fourth adjusting member 47b are snap rings. The first preload member 45a provides preload force between the first swing arm 41a and the synchronous slider 43, and the first adjusting member 46a is used to adjust the magnitude of the preload force provided by the first preload member 45a. The second preload member 45b provides preload force between the second swing arm 41b and the synchronous slider 43, and the second adjusting member 47a is used to adjust the magnitude of the preload force provided by the second preload member 45b. The third preload component 45c provides preload force between the third swing arm 42a and the synchronous slider 43, and the third adjustment component 46b is used to adjust the magnitude of the preload force provided by the third preload component 45c. The fourth preload component 45d provides preload force between the fourth swing arm 42b and the synchronous slider 43, and the fourth adjustment component 47b is used to adjust the preload force provided by the fourth preload component 45d.

[0204] refer to Figure 13 , Figure 13 yes Figure 12 The diagram shows the structure of the first synchronous swing arm 41 of the synchronization component 40.

[0205] The first swing arm 41a includes a first swing body 401a, a first connecting body 402a, and a first spiral body 403a connected sequentially along the X-axis. The first swing body 401a is plate-shaped, and one side of the first swing body 401a along the Y-axis is provided with spaced-apart first locking slots 404a, which are spaced-apart along the X-axis. The interval between any two adjacent first locking slots 404a is a first locking block 405a. Both the first locking slots 404a and the first locking blocks 405a are trapezoidal. In this embodiment, both the first locking slots 404a and the first locking blocks 405a are isosceles trapezoids. In other embodiments, both the first locking slots 404a and the first locking blocks 405a are right trapezoids. The long base of the first locking block 405a is aligned with the opening of the first locking slot 404a, and the short base of the first locking block 405a is aligned with the bottom surface of the slot of the first locking slot 404a. The first swing body 401a is used to cooperate with the first fixed plate 11, and the first locking groove 404a and the first locking block 405a are used to cooperate with the second swing arm 41b.

[0206] The first helical body 403a is cylindrical and has a first through hole 406a and a first helical opening. The first through hole 406a penetrates the first helical body 403a along the Y-axis. The first helical body 403a includes a first inner circumferential surface 407a, a first outer circumferential surface 408a, and a first end wall surface 409a. The first inner circumferential surface 407a is the wall surface of the first through hole 406a, and the first outer circumferential surface 408a faces away from the first inner circumferential surface 407a, forming the outer surface of the first helical body 403a. The first end wall surface 409a connects the first inner circumferential surface 407a and the first outer circumferential surface 408a. The first through hole 406a is circular, and its diameter remains consistent along the Y-axis; that is, the curvature of the first inner circumferential surface 407a remains consistent along the Y-axis, without any local protrusions or depressions. Therefore, the first through hole 406a can be machined using a mold, thus realizing the solution of machining the first spiral body 403a using a mold. When machining using a mold, the material can be ejected along the Y-axis direction.

[0207] The first helical opening is formed by a portion of the first inner circumferential surface 407a, a portion of the first outer circumferential surface 408a, and a portion of the first end wall surface 409a. The first helical opening has a first plane 410a and a first helical surface 411a. The two sides of the first plane 410a are connected to the first inner circumferential surface 407a and the first outer circumferential surface 408a, respectively. The two opposite ends of the first plane 410a along the Y-axis are connected to the first end wall surface 409a and the first helical surface 411a, respectively. The first helical surface 411a is a helically extended curved surface. The two sides of the first helical surface 411a are connected to the first inner circumferential surface 407a and the first outer circumferential surface 408a, respectively. The two ends of the first helical surface 411a along the Y-axis are connected to the first end wall surface 409a and the first plane 410a, respectively. The first helical body 403a is used to cooperate with the bearing base 20 and the synchronous slider 43. The first through hole 406a is used to mate with the first mounting shaft 44a, and the first helical opening and the first helical surface 411a are used to mate with the synchronous slider 43.

[0208] The first connector 402a is approximately S-shaped. One side of the first connector 402a is fixedly connected to the first swing body 401a, and the other side is fixedly connected to the first helical body 403a, specifically to the first outer peripheral surface 408a of the first helical body 403a. The first helical opening is located on the side of the first helical body 403a opposite to the first connector 402a. The first connector 402a avoids the support base 20 to allow the first helical body 403a to extend from the support base 20 and connect to the first fixing plate 11.

[0209] The second swing arm 41b includes a second swing body 401b, a second connecting body 402b, and a second spiral body 403b connected sequentially along the X-axis. The second swing body 401b is plate-shaped, and one side of the second swing body 401b along the Y-axis is provided with spaced-apart second locking slots 404b, which are spaced-apart along the X-axis. The interval between any two adjacent second locking slots 404b is a second locking block 405b. Both the second locking slots 404b and the second locking block 405b are trapezoidal. In this embodiment, both the second locking slots 404b and the second locking block 405b are isosceles trapezoids. In other embodiments, both the second locking slots 404b and the second locking block 405b are right trapezoids. The long base of the second locking block 405b is aligned with the opening of the second locking slot 404b, and the short base of the second locking block 405b is aligned with the bottom surface of the slot of the second locking slot 404b. The second swing body 401b is used to cooperate with the first fixed plate 11, and the second locking groove 404b and the second locking block 405b are used to cooperate with the first swing arm 41a.

[0210] The second helix 403b is cylindrical and has a second through hole 406b and a second helical opening. The second through hole 406b penetrates the second helix 403b along the Y-axis. The second helix 403b includes a second inner circumferential surface 407b, a second outer circumferential surface 408b, and a second end wall 409b. The second inner circumferential surface 407b is the wall surface of the second through hole 406b, and the second outer circumferential surface 408b faces away from the second inner circumferential surface 407b and is the outer surface of the second helix 403b. The second end wall 409b connects the second inner circumferential surface 407b and the second outer circumferential surface 408b. The second through hole 406b is a circular hole, and its diameter remains consistent along the Y-axis; that is, the curvature of the second inner circumferential surface 407b remains consistent along the Y-axis, without any bending or other irregularities. Therefore, the second through hole 406b can be machined using a mold, thus realizing the solution of machining the second spiral 403b using a mold. When machining using a mold, the part can be ejected along the Y-axis direction.

[0211] The second helical opening is formed by a portion of the second inner circumferential surface 407b, a portion of the second outer circumferential surface 408b, and a portion of the second end wall 409b. The second helical opening has a second plane 410b and a second helical surface 411b, the second helical surface 411b having the same helical direction as the first helical surface 411a. The two sides of the second plane 410b are connected to the second inner circumferential surface 407b and the second outer circumferential surface 408b, respectively, and the two opposite ends of the second plane 410b along the Y-axis are connected to the second end wall 409b and the second helical surface 411b, respectively. The second helical surface 411b is a helically extended curved surface. The two sides of the second helical surface 411b are connected to the second inner circumferential surface 407b and the second outer circumferential surface 408b, respectively, and the two ends of the second helical surface 411b along the Y-axis are connected to the second end wall 409b and the second plane 410b, respectively. The second helical body 403b is used to cooperate with the bearing base 20 and the synchronous slider 43. The second through hole 406b is used to mate with the first mounting shaft 44a, and the second helical opening and the second helical surface 411b are used to mate with the synchronous slider 43.

[0212] The second connector 402b is approximately S-shaped. One side of the second connector 402b is fixedly connected to the second swing body 401b, and the other side is fixedly connected to the second helix 403b, specifically to the second plane 410b of the second helix 403b. The second helical opening is located on the side of the second helix 403b facing the second connector 402b.

[0213] refer to Figure 14 , Figure 14 yes Figure 12The diagram shows the structure of the second synchronous swing arm 42 of the synchronization component 40. The second synchronous swing arm 42 has the same structure as the first synchronous swing arm 41. The third swing arm 42a and the fourth swing arm 42b are detachably connected. In other embodiments, the second synchronous swing arm 42 may have a different structure from the first synchronous swing arm 41; specifically, the third swing arm 42a and the fourth swing arm 42b may be integrally formed.

[0214] The third swing arm 42a includes a third swing body 421a, a third connecting body 422a, and a third spiral body 423a connected sequentially along the X-axis. The third swing body 421a is plate-shaped, and one side of the third swing body 421a along the Y-axis has spaced-apart third locking slots 424a, which are spaced-apart along the X-axis. The interval between any two adjacent third locking slots 424a is a third locking block 425a. Both the third locking slots 424a and the third locking blocks 425a are trapezoidal. In this embodiment, both the third locking slots 424a and the third locking blocks 425a are isosceles trapezoids. In other embodiments, both the third locking slots 424a and the third locking blocks 425a are right trapezoids. The long base of the third locking block 425a is aligned with the opening of the third locking slot 424a, and the short base of the third locking block 425a is aligned with the bottom surface of the slot of the third locking slot 424a. The third swing body 421a is used to cooperate with the second fixed plate 12, and the third locking groove 424a and the third locking block 425a are used to cooperate with the fourth swing arm 42b.

[0215] The third helix 423a is cylindrical and has a third through hole 426a and a third helical opening. The third through hole 426a penetrates the third helix 423a along the Y-axis. The third helix 423a includes a third inner circumferential surface 427a, a third outer circumferential surface 428a, and a third end wall surface 429a. The third inner circumferential surface 427a is the wall surface of the third through hole 426a, and the third outer circumferential surface 428a faces away from the third inner circumferential surface 427a, forming the outer surface of the third helix 423a. The third end wall surface 429a connects the third inner circumferential surface 427a and the third outer circumferential surface 428a. The third through hole 426a is circular, and its diameter remains consistent along the Y-axis; that is, the curvature of the third inner circumferential surface 427a remains consistent along the Y-axis, without any bending or other irregularities. Therefore, the third through hole 426a can be machined using a mold, thus realizing the solution of machining the third helix 423a using a mold. When machining using a mold, the material can be ejected along the Y-axis direction.

[0216] The third helical opening is formed by a portion of the third inner circumferential surface 427a, a portion of the third outer circumferential surface 428a, and a portion of the third end wall 429a. The third helical opening has a third plane 430a and a third helical surface 431A. The two sides of the third plane 430a are connected to the third inner circumferential surface 427a and the third outer circumferential surface 428a, respectively. The two opposite ends of the third plane 430a along the Y-axis are connected to the third end wall 429a and the third helical surface 431A, respectively. The third helical surface 431A is a helically extended curved surface. The two sides of the third helical surface 431A are connected to the third inner circumferential surface 427a and the third outer circumferential surface 428a, respectively. The two opposite ends of the third helical surface 431A along the Y-axis are connected to the third end wall 429a and the third plane 430a, respectively. The third helix 423a is used to cooperate with the bearing base 20 and the synchronous slider 43. The third through hole 426a is used to mate with the second mounting shaft 44b, and the third helical opening and the third helical surface 431A are used to mate with the synchronous slider 43.

[0217] The third connector 422a is approximately S-shaped. One side of the third connector 422a is fixedly connected to the third swing body 421a, and the other side is fixedly connected to the third helical body 423a, specifically to the third outer circumferential surface 428a of the third helical body 423a. The third helical opening is located on the side of the third helical body 423a opposite to the third connector 422a.

[0218] The fourth swing arm 42b includes a fourth swing body 421b, a fourth connecting body 422b, and a fourth spiral body 423b connected sequentially along the X-axis. The fourth swing body 421b is plate-shaped, and one side of the fourth swing body 421b along the Y-axis is provided with spaced fourth locking slots 424b, which are spaced apart along the X-axis. The interval between any two adjacent fourth locking slots 424b is a fourth locking block 425b. Both the fourth locking slots 424b and the fourth locking blocks 425b are trapezoidal. In this embodiment, both the fourth locking slots 424b and the fourth locking blocks 425b are isosceles trapezoids. In other embodiments, both the fourth locking slots 424b and the fourth locking blocks 425b are right trapezoids. The long bottom edge of the fourth locking block 425b is aligned with the opening of the fourth locking groove 424b, and the short bottom edge of the fourth locking block 425b is aligned with the bottom surface of the groove of the fourth locking groove 424b. The fourth swing body 421b is used to cooperate with the second fixed plate 12, and the fourth locking groove 424b and the fourth locking block 425b are used to cooperate with the third swing arm 42a.

[0219] The fourth helix 423b is cylindrical and has a fourth through hole 426b and a fourth helical opening. The fourth through hole 426b penetrates the fourth helix 423b along the Y-axis. The fourth helix 423b includes a fourth inner circumferential surface 427b, a fourth outer circumferential surface 428b, and a fourth end wall. The fourth inner circumferential surface 427b is the wall surface of the fourth through hole 426b, and the fourth outer circumferential surface 428b faces away from the fourth inner circumferential surface 427b, forming the outer surface of the fourth helix 423b. The fourth end wall connects the fourth inner circumferential surface 427b and the fourth outer circumferential surface 428b. The fourth through hole 426b is circular, and its diameter remains consistent along the Y-axis; that is, the curvature of the fourth inner circumferential surface 427b remains consistent along the Y-axis, without any bending or other irregularities. Therefore, the fourth through hole 426b can be machined using a mold, thus realizing the solution of machining the fourth helix 423b using a mold. When machining using a mold, the part can be ejected along the Y-axis direction.

[0220] The fourth helical opening is formed by a portion of the fourth inner circumferential surface 427b, a portion of the fourth outer circumferential surface 428b, and a portion of the fourth end wall. The fourth helical opening has a fourth plane and a fourth helical surface 431B. The helical direction of the fourth helical surface 431B is the same as that of the third helical surface 431A. The two sides of the fourth plane are connected to the fourth inner circumferential surface 427b and the fourth outer circumferential surface 428b, respectively. The two opposite ends of the fourth plane along the Y-axis are connected to the fourth end wall and the fourth helical surface 431B, respectively. The fourth helical surface 431B is a helically extended curved surface. The two sides of the fourth helical surface 431B are connected to the fourth inner circumferential surface 427b and the fourth outer circumferential surface 428b, respectively. The two opposite ends of the fourth helical surface 431B along the Y-axis are connected to the fourth end wall and the fourth plane, respectively. The fourth helical body 423b is used to mate with the bearing base 20 and the synchronous slider 43. The fourth through hole 426b is used to mate with the second mounting shaft 44b, and the fourth helical opening and the fourth helical surface 431B are used to mate with the synchronous slider 43.

[0221] The fourth connector 422b is approximately S-shaped. One side of the fourth connector 422b is fixedly connected to the fourth swing body 421b, and the other side is fixedly connected to the fourth helical body 423b, specifically to the fourth plane of the fourth helical body 423b. The fourth helical opening is located on the side of the fourth helical body 423b facing the fourth connector 422b.

[0222] refer to Figure 15 , Figure 15 yes Figure 12 The diagram shows the structure of the synchronization slider 43 of the synchronization component 40 shown.

[0223] The synchronization slider 43 includes a synchronization body 431, a first spiral block 432, a second spiral block 433, a first connecting block 434, and a second connecting block 435. The first spiral block 432 and the second spiral block 433 are located on both sides of the synchronization body 431 along the X-axis direction, and the first connecting block 434 and the second connecting block 435 are located on both sides of the synchronization body 431 along the X-axis direction. The first spiral block 432 and the first connecting block 434 are located on the same side of the synchronization body 431, and the second spiral block 433 and the second connecting block 435 are located on the same side of the synchronization body 431.

[0224] The synchronization body 431 is generally rectangular in shape. It includes a first synchronization surface 431a and a second synchronization surface 431b, which are opposite to each other along the Z-axis, and a first synchronization side surface 431c, which are opposite to each other along the X-axis. The first synchronization side surface connects one side of the first synchronization surface 431a and one side of the second synchronization surface 431b, and the second synchronization side surface 431c connects the other side of the first synchronization surface 431a and the other side of the second synchronization surface 431b. Both the first and second synchronization side surfaces 431c are inclined arc-shaped surfaces. Both the first and second synchronization side surfaces 431c are inclined relative to the central axis of the synchronization slider 43 along the Z-axis, and the inclination direction of both the first and second synchronization side surfaces 431c is opposite to the central axis of the synchronization slider 43 along the X-axis.

[0225] The synchronization body 431 is provided with a first ejection groove (not shown), a second ejection groove 431d, and a guide groove 431e. The first ejection groove penetrates the first synchronization side surface and the second synchronization surface 431b, and the second ejection groove 431d penetrates the second synchronization side surface 431c and the second synchronization surface 431b. Both the first ejection groove and the second ejection groove 431d are approximately triangular. The first ejection groove and the second ejection groove 431d facilitate the machining of the synchronization slider 43 using a mold. The guide groove 431e is formed by the second synchronization surface 431b being recessed towards the first synchronization surface 431a. The guide groove 431e penetrates the synchronization body 431 along the Y-axis direction and is used to cooperate with the guide strip 233 so that the synchronization slider 43 slides along the Y-axis direction under the guidance of the guide strip 233, thereby increasing the stability of the sliding of the synchronization slider 43.

[0226] The first spiral block 432 protrudes along the first synchronous side and has a first through hole 432a extending along the Y-axis. The first spiral block 432 includes a first connecting surface (not shown), a second connecting surface 432b, a first inner wall surface 432c, a first outer wall surface 432d, a first mating surface 432e, and a second mating surface 432f. The first connecting surface and the second connecting surface 432b are opposite to each other along the Y-axis and are both planar. The first through hole 432a penetrates the first connecting surface and the second connecting surface 432b. The first inner wall surface 432c and the first outer wall surface 432d are both arc-shaped surfaces. A portion of the first inner wall surface 432c is the wall surface of the first through hole 432a. The first outer wall surface 432d is opposite to the first inner wall surface 432c and is the outer surface of the first spiral block 432.

[0227] The first mating surface 432e and the second mating surface 432f both extend spirally around the axial direction of the first through hole 432a, and the spiral directions of the first mating surface 432e and the second mating surface 432f are the same. The first mating surface 432e and the second mating surface 432f are located on opposite sides of the first through hole 432a along the Y-axis. The opposite sides of the first mating surface 432e along the extension direction are respectively connected to the first inner wall surface 432c and the first outer wall surface 432d, and the two ends of the extension direction of the first mating surface 432e are respectively connected to the first synchronizing side surface and the first connecting surface. The opposite sides of the second mating surface 432f along the extension direction are respectively connected to the first inner wall surface 432c and the first outer wall surface 432d, and the two ends of the second mating surface 432f along the Y-axis are respectively connected to the first synchronizing side surface and the second connecting surface 432b. The first through hole 432a is used to mate with the first mounting shaft 44a, the first mating surface 432e is used to mate with the first helical surface 411a, and the second mating surface 432f is used to mate with the second helical surface 411b.

[0228] The portion of the first inner wall surface 432c forming the first through hole 432a and the remaining portion of the first inner wall surface 432c are connected in the Y-axis direction, and the curvature of the portion of the first inner wall surface 432c forming the first through hole 432a and the remaining portion of the first inner wall surface 432c along the X-axis direction is consistent. That is, the first through hole 432a is a circular hole, and the hole diameter remains unchanged. Therefore, when processing the first through hole 432a using a mold, the mold can be ejected along the Y-axis direction, realizing the processing of the first through hole 432a using a mold, and the first mating surface 432e and the first through hole 432a can be processed simultaneously. The second mating surface 432f is flush with the groove wall surface of the first ejection groove in the Z-axis direction. When processing the second mating surface 432f using a mold, the mold can be ejected along the Z-axis direction, realizing the processing of the second mating surface 432f using a mold. Therefore, the first spiral block 432 can be made using a mold.

[0229] The second spiral block 433 has the same structure as the first spiral block 432, and the first spiral block 432 and the second spiral block 433 are symmetrical with respect to the synchronization body 431. The second spiral block 433 is formed by protrusion along the second synchronization side surface 431c, and the second spiral block 433 is provided with a second through hole 433a extending along the Y-axis direction. The second spiral block 433 includes a third connecting surface (not shown), a fourth connecting surface 433b, a second inner wall surface 433c, a second outer wall surface 433d, a third mating surface 433e, and a fourth mating surface 433f. The third connecting surface and the fourth connecting surface 433b are opposite to each other along the Y-axis direction, and both the third connecting surface and the fourth connecting surface 433b are planar. The second through hole 433a penetrates the third connecting surface and the fourth connecting surface 433b. The second inner wall surface 433c and the second outer wall surface 433d are both arc-shaped surfaces, a portion of the second inner wall surface 433c is the hole wall surface of the second through hole 433a, and the second outer wall surface 433d is opposite to the second inner wall surface 433c.

[0230] Both the third mating surface 433e and the fourth mating surface 433f extend spirally around the second through hole 433a along its axial direction, and the spiral directions of the third mating surface 433e and the fourth mating surface 433f are the same. The third mating surface 433e and the fourth mating surface 433f are located on opposite sides of the second through hole 433a along the Y-axis. The opposite sides of the third mating surface 433e along its extension direction are connected to the second inner wall surface 433c and the second outer wall surface 433d, respectively. The two ends of the extension direction of the third mating surface 433e are connected to the second synchronous side surface 431c and the third connecting surface, respectively. The opposite sides of the fourth mating surface 433f along its extension direction are connected to the second inner wall surface 433c and the second outer wall surface 433d, respectively. The two ends of the fourth mating surface 433f along the Y-axis are connected to the second synchronous side surface 431c and the fourth connecting surface 433b, respectively. The second through hole 433a is used to mate with the second mounting shaft 44b, the third mating surface 433e is used to mate with the third helical surface 431A, and the fourth mating surface 433f is used to mate with the fourth helical surface 431B.

[0231] The portion of the second inner wall surface 433c forming the second through hole 433a and the remaining portion of the second inner wall surface 433c are connected in the Y-axis direction, and the curvature of the portion of the second inner wall surface 433c forming the second through hole 433a and the remaining portion of the second inner wall surface 433c along the X-axis direction is consistent. That is, the second through hole 433a is a circular hole, and the hole diameter remains unchanged. Therefore, when machining the second through hole 433a using a mold, the mold can be ejected along the Y-axis direction, realizing the machining of the second through hole 433a using a mold, and the third mating surface 433e is machined simultaneously with the second through hole 433a. The fourth mating surface 433f is flush with the groove wall surface of the second ejection groove 431d in the Z-axis direction. When machining the fourth mating surface 433f using a mold, the mold can be ejected along the Z-axis direction, realizing the machining of the fourth mating surface 433f using a mold. Therefore, the second spiral block 433 can be made using a mold.

[0232] A first connecting block 434 protrudes along a first synchronizing side and has a first through hole 434a that penetrates the first connecting block 434 along the Y-axis. A second connecting block 435 protrudes along a second synchronizing side 431c and has a second through hole 435a that penetrates the second connecting block 435 along the Y-axis. The first through hole 434a is coaxial with the first through hole 432a, and the second through hole 435a is coaxial with the second through hole 433a. The first through hole 434a and the first through hole 432a are used to mate with a first mounting shaft 44a, and the second through hole 435a and the second through hole 433a are used to mate with a second mounting shaft 44b.

[0233] refer to Figure 16 and Figure 17 , Figure 16 yes Figure 4 A schematic diagram of the damping component 50 of the rotating mechanism 100 shown in the figure. Figure 17 yes Figure 16 The diagram shows a split structure of the damping component 50.

[0234] As mentioned above, the damping assembly 50 includes a first damping swing arm 51, a second damping swing arm 52, a first sliding member 53, a second sliding member 54, and an elastic assembly 55. The elastic assembly 55 includes a first elastic member 551, a second elastic member 552, a third elastic member 553, and a fourth elastic member 554. All four elastic members are springs. In other embodiments, all four elastic members are rubber components.

[0235] In this embodiment, the damping assembly 50 further includes a first connecting shaft, a second connecting shaft, a first connecting rod 56a, a second connecting rod 56b, a third connecting rod 56c, and a fourth connecting rod 56d.

[0236] refer to Figure 18 , Figure 18 yes Figure 17 A schematic diagram of the structure of the first damping swing arm 51 of the damping assembly 50 shown.

[0237] The first damping swing arm 51 includes a first sliding body 511 and a first rotating body 512 fixedly connected along the X-axis. The first sliding body 511 is used to slide and rotate to connect the first fixed plate 11, and the first rotating body 512 is used to rotate to connect the first sliding member 53, the second sliding member 54 and the bearing base 20.

[0238] The first sliding body 511 is a thin plate and includes a first connecting arm 513, a first sliding arm 514, a second sliding arm 515, a first sliding cylinder 516, and a second sliding cylinder 517. The first connecting arm 513 is a long strip plate, and its length direction is parallel to the Y-axis direction. The first sliding arm 514 and the second sliding arm 515 are both rectangular plates, and their length directions are both parallel to the X-axis direction. The width of the first sliding arm 514 and the second sliding arm 515 along the Y-axis direction is smaller than the length of the first connecting arm 513 along the Y-axis direction.

[0239] The first sliding arm 514 and the second sliding arm 515 are both fixedly connected to one side of the first connecting arm 513. The first sliding arm 514 and the second sliding arm 515 are arranged at intervals along the Y-axis. The first sliding cylinder 516 is fixedly connected to the side of the first sliding arm 514 away from the first connecting arm 513, and the second sliding cylinder 517 is fixedly connected to the side of the second sliding arm 515 away from the first connecting arm 513. Both the first sliding cylinder 516 and the second sliding cylinder 517 are cylindrical. The first sliding cylinder 516 has a first sliding hole 516a, and the second sliding cylinder 517 has a second sliding hole 517a. The axial directions of both the first sliding hole 516a and the second sliding hole 517a are parallel to the Y-axis, and the first sliding hole 516a and the second sliding hole 517a are coaxial. The first sliding hole 516a and the second sliding hole 517a are used to mate with the first connecting shaft.

[0240] The first rotating body 512 includes a first rotating cylinder 512a, a second rotating cylinder 512b, a first concave cam 512c, and a second concave cam 512d. The first rotating cylinder 512a has a first rotating hole 512e, and the second rotating cylinder 512b has a second rotating hole 512f. Both the first rotating cylinder 512a and the second rotating cylinder 512b are fixedly connected to the side of the first connecting arm 513 opposite to the first sliding arm 514 and the second sliding arm 515. The first rotating cylinders 512a and 512b are arranged at intervals along the Y-axis, forming a U-shape with the first rotating cylinder 512a, the second rotating cylinder 512b, and the first connecting arm 513. The axes of the first rotating hole 512e and the second rotating hole 512f are both parallel to the Y-axis, and the first rotating hole 512e and the second rotating hole 512f are coaxial. The first concave cam 512c is fixedly connected to one side of the first rotating cylinder 512a and is coaxial with the first rotating hole 512e. The second concave cam 512d has the same structure as the first concave cam 512c. The second concave cam 512d is fixedly connected to one side of the second rotating cylinder 512b and is coaxial with the second rotating hole 512f. One side of the first rotating cylinder 512a and one side of the second rotating cylinder 512b are spaced apart and opposite to each other, as are the first concave cam 512c and the second concave cam 512d. The first concave cam 512c includes multiple first concave portions (not shown) and multiple first protrusions (not shown), which are alternately distributed. The second concave cam 512d includes multiple second concave portions (not shown) and multiple second protrusions (not shown), which are alternately distributed.

[0241] refer to Figure 19 , Figure 19 yes Figure 17 A schematic diagram of the structure of the second damping swing arm 52 of the damping component 50 shown.

[0242] The second damping swing arm 52 has the same structure as the first damping swing arm 51. The second damping swing arm 52 includes a second sliding body 521 and a second rotating body 522 fixedly connected along the X-axis. The second sliding body 521 is used to slide and rotatably connect to the second fixed plate 12, and the second rotating body 522 is used to rotatably connect the first sliding member 53, the second sliding member 54 and the bearing base 20.

[0243] The second sliding body 521 is a thin plate and includes a second connecting arm 523, a third sliding arm 524, a fourth sliding arm 525, a third sliding cylinder 526, and a fourth sliding cylinder 527. The second connecting arm 523 is a long strip plate, and its length direction is parallel to the Y-axis. The third sliding arm 524 and the fourth sliding arm 525 are both rectangular plates, and their length directions are parallel to the X-axis. The width of the third sliding arm 524 and the fourth sliding arm 525 along the Y-axis is smaller than the length of the second connecting arm 523 along the Y-axis.

[0244] The third sliding arm 524 and the fourth sliding arm 525 are both fixedly connected to one side of the second connecting arm 523. The third sliding arms 524 and the fourth sliding arms 525 are arranged at intervals along the Y-axis. The third sliding cylinder 526 is fixedly connected to the side of the third sliding arm 524 away from the second connecting arm 523, and the fourth sliding cylinder 527 is fixedly connected to the side of the fourth sliding arm 525 away from the second connecting arm 523. Both the third sliding cylinder 526 and the fourth sliding cylinder 527 are cylindrical. The third sliding cylinder 526 has a third sliding hole 526a, and the fourth sliding cylinder 527 has a fourth sliding hole 527a. The axial directions of both the third sliding hole 526a and the fourth sliding hole 527a are parallel to the Y-axis, and they are coaxial. The third sliding hole 526a and the fourth sliding hole 527a are used to mate with the second connecting shaft.

[0245] The second rotating body 522 includes a third rotating cylinder 522a, a fourth rotating cylinder 522b, a third concave cam 522c, and a fourth concave cam 522d. The third rotating cylinder 522a has a third rotating hole 522e, and the fourth rotating cylinder 522b has a fourth rotating hole 522f. Both the third rotating cylinder 522a and the fourth rotating cylinder 522b are fixedly connected to the side of the second connecting arm 523 opposite to the third sliding arm 524 and the fourth sliding arm 525. The third rotating cylinders 522a and the fourth rotating cylinder 522b are arranged at intervals along the Y-axis, forming a U-shape with the second connecting arm 523. The axes of the third rotating hole 522e and the fourth rotating hole 522f are parallel to the Y-axis, and they are coaxial. The third concave cam 522c is fixedly connected to one side of the third rotating cylinder 522a and is coaxial with the third rotating hole 522e. The fourth concave cam 522d has the same structure as the third concave cam 522c. The fourth concave cam 522d is fixedly connected to one side of the fourth rotating cylinder 522b and is coaxial with the fourth rotating hole 522f. One side of the third rotating cylinder 522a and one side of the fourth rotating cylinder 522b are spaced apart and opposite to each other, as are the third concave cam 522c and the fourth concave cam 522d. The third concave cam 522c includes multiple third concave portions (not shown in the figure) and multiple third protrusions (not shown in the figure), which are alternately distributed. The fourth concave cam 522d includes multiple fourth concave portions (not shown in the figure) and multiple fourth protrusions (not shown in the figure), which are alternately distributed.

[0246] refer to Figure 20 , Figure 20 yes Figure 17 A schematic diagram of the structure of the first slider 53 of the damping component 50 shown.

[0247] The first sliding member 53 includes a first slider 531, a first mating wheel 532, and a third mating wheel 533. The first slider 531 has a first connecting hole 534, a fifth connecting hole 536, a seventh connecting hole 537, and a third connecting hole 535 arranged at intervals along the X-direction. All three connecting holes 534, 536, 537, and 535 penetrate the first slider 531 along the Y-axis. The first mating wheel 532 and the third mating wheel 533 have the same structure and are both fixedly connected to one surface of the first slider 531. The first mating wheel 532 is coaxial with the first connecting hole 534, and the third mating wheel 533 is coaxial with the third connecting hole 535. The first mating wheel 532 includes multiple first mating recesses (not shown) and multiple first mating protrusions (not shown), which are alternately distributed. The third mating wheel 533 includes multiple third mating recesses (not shown) and multiple third mating protrusions (not shown), which are alternately distributed. A first guide groove 538 is provided on one side of the first slider 531, extending through the first slider 531 along the Y-axis direction, and its extension direction is parallel to the Y-axis direction. The first mating wheel 532 is used to mate with the first concave cam 512c, and the third mating wheel 533 is used to mate with the third concave cam 522c. The first connecting hole 534 is used to mate with the first connecting rod 56a, the third connecting hole 535 is used to mate with the second connecting rod 56b, the fifth connecting hole 536 is used to mate with the third connecting rod 56c, and the seventh connecting hole 537 is used to mate with the fourth connecting rod 56d. The first guide groove 538 is used to mate with the guide bar 241 to guide the movement of the first slider 531 along the Y-axis direction, preventing wobbling during movement and ensuring more stable movement of the first slider 53.

[0248] refer to Figure 21 , Figure 21 yes Figure 17 A schematic diagram of the structure of the second slider 54 of the damping component 50 shown.

[0249] The structure of the second sliding member 54 is the same as that of the first sliding member 53. The second sliding member 54 includes a second slider 541, a second mating wheel 542, and a fourth mating wheel 543. The second slider 541 is provided with a second connecting hole 544, a sixth connecting hole 546, an eighth connecting hole 547, and a fourth connecting hole 545 arranged at intervals along the X-axis. The second connecting hole 544, the sixth connecting hole 546, the eighth connecting hole 547, and the fourth connecting hole 545 all penetrate the second slider 541 along the Y-axis. The second mating wheel 542 and the fourth mating wheel 543 have the same structure and are both fixedly connected to one surface of the second slider 541. The second mating wheel 542 is coaxial with the second connecting hole 544, and the fourth mating wheel 543 is coaxial with the fourth connecting hole 545. The second mating wheel 542 includes a plurality of second mating recesses (not shown in the figure) and a plurality of second mating protrusions (not shown in the figure), which are alternately distributed. The fourth mating wheel 543 includes multiple fourth mating recesses (not shown) and multiple fourth mating protrusions (not shown), which are alternately distributed. A second guide groove 548 is provided on one side of the second slider 541, extending through the second slider 541 along the Y-axis direction, and its extension direction is parallel to the Y-axis direction. The second mating wheel 542 is used to mate with the second concave cam 512d, and the fourth mating wheel 543 is used to mate with the fourth concave cam 522d. The second connecting hole 544 is used to mate with the first connecting rod 56a, the fourth connecting hole 545 is used to mate with the second connecting rod 56b, the sixth connecting hole 546 is used to mate with the third connecting rod 56c, and the eighth connecting hole 547 is used to mate with the fourth connecting rod 56d. The second guide groove 548 is used to cooperate with the guide bar 241 to guide the movement of the second slider 541 along the Y-axis direction, prevent the second slider 541 from shaking when moving along the Y-axis direction, and make the movement of the second slider 54 more stable.

[0250] In this embodiment, reference Figure 5 The first fixing plate 11 and the second fixing plate 12 are located on opposite sides of the bearing base 20, respectively.

[0251] refer to Figure 4 , Figure 8 and Figure 9The first main swing arm 31 is rotatably connected to the bearing base 20. Specifically, at least a portion of the first main sliding body 312 of the first main swing arm 31 is located within the first main sliding groove 21 of the bearing base 20. The first sliding surface 314 of the first main sliding body 312 faces the arcuate portion of the bottom surface of the first main sliding groove 21, so that the first main sliding body 312 can slide and rotate along the bottom surface of the first main sliding groove 21, allowing the first main swing arm 31 to slide and rotate relative to the bearing base 20. The first mating block 317 of the first main sliding body 312 is located within the gap between the first limiting block 212 and the bottom surface of the first main sliding groove 21, and the second mating block 318 is located within the gap between the second limiting block 213 and the bottom surface of the first main sliding groove 21. When the first main sliding body 312 slides and rotates, the first mating block 317 and the second mating block 318 restrict the movement of the first main sliding body 312 along the Z-axis direction, preventing the first main sliding body 312 from disengaging from the first main sliding groove 21 along the Z-axis direction. The first stop block 211 in the first main slide groove 21 of the support base 20 is located in the first stop groove 315 of the first main sliding body 312. When the first main sliding body 312 slides and rotates relative to the support base 20, the first stop block 211 abuts against the first stop surface of the first stop groove 315 to prevent the first main sliding body 312 from sliding out of the first main slide groove 21 along the X-axis direction.

[0252] At least a portion of the first main rotating body 311 of the first main swing arm 31 is located within the first rotating groove 111 of the first fixed plate 11, and the first fixed hole 118, the first through hole 313, and the second fixed hole are coaxial. The first fixed shaft 33 passes through the first through hole 313, and the opposite ends of the first fixed shaft 33 are respectively fixed in the first fixed hole 118 and the second fixed hole, so that the first main rotating body 311 can rotate around the first fixed shaft 33, thereby realizing the rotation of the first main swing arm 31 relative to the first fixed plate 11.

[0253] refer to Figure 4 , Figure 8 and Figure 10The second main swing arm 32 is rotatably connected to the bearing base 20. Specifically, at least a portion of the second main sliding body 322 of the second main swing arm 32 is located within the second main sliding groove 22 of the bearing base 20. The second mating block 318 of the second main sliding body 322 is located within the gap between the third limiting block 222 and the bottom surface of the second main sliding groove 22, and the fourth mating block 328 is located within the gap between the fourth limiting block 223 and the bottom surface of the second main sliding groove 22. The second sliding surface 324 of the second main sliding body 322 faces the arc-shaped portion of the bottom surface of the second main sliding groove 22, so that the second main sliding body 322 can slide and rotate along the bottom surface of the second main sliding groove 22, thereby allowing the second main swing arm 32 to slide and rotate relative to the bearing base 20. The third mating block 327 of the second main sliding body 322 is located within the gap between the third limiting block 222 and the bottom surface of the second main sliding groove 22, and the fourth mating block 328 is located within the gap between the fourth limiting block 223 and the bottom surface of the second main sliding groove 22. When the second main sliding body 322 slides and rotates, the third mating block 327 and the fourth mating block 328 restrict the movement of the second main sliding body 322 along the Z-axis direction, preventing the second main sliding body 322 from disengaging from the second main sliding groove 22 along the Z-axis direction. The second stop block 221 in the second main sliding groove 22 of the bearing base 20 is located in the second stop groove 325 of the second main sliding body 322. When the second main sliding body 322 slides and rotates relative to the bearing base 20, the second stop block 221 abuts against the second stop surface of the second stop groove 325, preventing the second main sliding body 322 from sliding out of the second main sliding groove 22 along the X-axis direction.

[0254] At least a portion of the second main rotating body 321 of the second main swing arm 32 is located within the second rotating groove 121 of the second fixed plate 12, and the third fixed hole 128, the second through hole 323, and the fourth fixed hole are coaxial. The second fixed shaft 34 passes through the second through hole 323, and the opposite ends of the second fixed shaft 34 are respectively fixed in the third fixed hole 128 and the fourth fixed hole, so that the second main rotating body 321 can rotate around the second fixed shaft 34, thereby realizing the rotation of the second main swing arm 32 relative to the second fixed plate 12.

[0255] In this embodiment, reference Figure 11 and Figure 12The first adjusting component 46a, the first pre-compression component 45a, the first spiral body 403a, the portion of the first spiral block 432 with the first through hole 432a, the second spiral body 403b, the second pre-compression component 45b, the second adjusting component 47a, and the first connecting block 434 are located on the same side of the synchronization body 431 and are arranged sequentially along the Y-axis. The first adjusting component 46a is a nut. The threaded hole of the first adjusting component 46a, the hollow portion of the first pre-compression component 45a, the first through hole 406a of the first spiral body 403a, the first through hole 432a of the first spiral block 432, the second through hole 406b of the second spiral body 403b, the hollow portion of the second pre-compression component 45b, the hollow portion of the second adjusting component 47a, and the first through hole 434a of the first connecting block 434 are all coaxial. The first mounting shaft 44a passes sequentially through the threaded hole of the first adjusting member 46a, the hollow portion of the first pre-compression member 45a, the first through hole 406a of the first spiral body 403a, the first through hole 432a of the first spiral block 432, the second through hole 406b of the second spiral body 403b, the hollow portion of the second pre-compression member 45b, the hollow portion of the second adjusting member 47a, and the first through hole 434a of the first connecting block 434. Both the first spiral body 403a and the second spiral body 403b can rotate around the first mounting shaft 44a.

[0256] The first swing body 401a of the first swing arm 41a and the second swing body 401b of the second swing arm 41b cooperate. One of the first swing arms 41a and the second swing arm 41b is provided with a locking groove, and the other of the first swing arms 41a and the second swing arm 41b is provided with a locking block; the locking block is locked into the locking groove. The first swing arm 41a and the second swing arm 41b are detachably connected by the locking groove and the locking block, which has a simple structure, is easy to process, and has a low cost. In this embodiment, the first locking block 405a of the first swing body 401a is located in the second locking groove 404b of the second swing body 401b, and the second locking block 405b of the second swing body 401b is located in the first locking groove 404a of the first swing body 401a. The first locking slot 404a, the first locking block 405a, the second locking slot 404b, and the second locking block 405b are all trapezoidal structures, which can prevent the first swing body 401a and the second swing body 401b from coming loose after they are engaged, and ensure the stability of the engagement between the first swing body 401a and the second swing body 401b.

[0257] In other embodiments, the first swing arm 41a and the second swing arm 41b can be engaged by elastic buckles. Specifically, an elastic buckle is provided on one side of the first swing arm 41a, and an inner groove is provided on one side of the second swing arm 41b. The elastic buckle engages in the inner groove, thereby achieving a detachable connection between the first swing arm 41a and the second swing arm 41b.

[0258] The first helical body 403a mates with the first helical block 432 and the synchronization body 431 of the synchronization slider 43. Specifically, the first outer peripheral surface 408a of the first helical body 403a faces the first synchronization side surface, and the first helical body 403a can slide along the first synchronization side surface. A portion of the first helical block 432 of the synchronization slider 43 is located within the first helical opening of the first helical body 403a, and the first helical surface 411a of the first helical body 403a mates with the first mating surface 432e of the synchronization slider 43. The first helical surface 411a faces the first mating surface 432e, and at least a portion of the first helical surface 411a abuts against the first mating surface 432e. The first end wall surface 409a of the first helical body 403a abuts against the first connecting surface of the first helical block 432.

[0259] The second helix 403b engages with both the first helical block 432 and the synchronization body 431 of the synchronization slider 43. Specifically, the second outer peripheral surface 408b of the second helix 403b faces the first synchronization side surface, and the second helix 403b can slide along the first synchronization side surface. Another portion of the first helical block 432 of the synchronization slider 43 is located within the second helical opening of the second helix 403b, and the second helical surface 411b of the second helix 403b engages with the second mating surface 432f of the synchronization slider 43. The second helical surface 411b faces the second mating surface 432f, and at least a portion of the second helical surface 411b abuts against the second mating surface 432f. The second end wall 409b of the second helix 403b faces the second connecting surface 432b of the first helical block 432, and the second end wall 409b and the second connecting surface 432b are spaced apart in the Y-axis direction.

[0260] The third adjusting component 46b, the third pre-compression component 45c, the third spiral body 423a, the portion of the second spiral block 433 with the second through hole 433a, the fourth spiral body 423b, the fourth pre-compression component 45d, the fourth adjusting component 47b, and the second connecting block 435 are located on the same side of the synchronization body 431 and are arranged sequentially along the Y-axis. The third adjusting component 46b is a nut. The threaded hole of the third adjusting component 46b, the hollow portion of the third pre-compression component 45c, the third through hole 426a of the third spiral body 423a, the second through hole 433a of the second spiral block 433, the fourth through hole 426b of the fourth spiral body 423b, the hollow portion of the third pre-compression component 45c, the hollow portion of the fourth adjusting component 47b, and the second through hole 435a of the second connecting block 435 are all coaxial. The second mounting shaft 44b passes sequentially through the threaded hole of the third adjusting member 46b, the hollow portion of the third pre-compression member 45c, the third through hole 426a of the third spiral body 423a, the second through hole 433a of the second spiral block 433, the fourth through hole 426b of the fourth spiral body 423b, the hollow portion of the fourth pre-compression member 45d, the hollow portion of the fourth adjusting member 47b, and the second through hole 435a of the second connecting block 435. The third spiral body 423a and the fourth spiral body 423b can rotate around the second mounting shaft 44b.

[0261] The third swing body 421a of the third swing arm 42a and the fourth swing body 421b of the fourth swing arm 42b are coupled. One of the third swing arms 42a and the fourth swing arm 42b is provided with a locking groove, and the other of the third swing arms 42a and the fourth swing arm 42b is provided with a locking block; the locking block is locked into the locking groove. The third swing arm 42a and the fourth swing arm 42b are detachably connected by the locking groove and the locking block, which has a simple structure, is easy to manufacture, and has a low cost. In this embodiment, the third locking block 425a of the third swing body 421a is located in the fourth locking groove 424b of the fourth swing body 421b, and the fourth locking block 425b of the fourth swing body 421b is located in the third locking groove 424a of the third swing body 421a. The third locking slot 424a, the third locking block 425a, the fourth locking slot 424b, and the fourth locking block 425b are all trapezoidal structures, which can prevent the third swing body 421a and the fourth swing body 421b from coming loose after they are engaged, and ensure the stability of the engagement between the third swing body 421a and the fourth swing body 421b.

[0262] In other embodiments, a resilient buckle is provided on one side of the third swing arm 42a, which is the aforementioned snap-fit ​​block. An inner groove is provided on one side of the fourth swing arm 42b, which is the aforementioned snap-fit ​​groove. The resilient buckle snaps into the inner groove, thus enabling a detachable connection between the third swing arm 42a and the fourth swing arm 42b.

[0263] The third helix 423a mates with both the second helical block 433 and the synchronization body 431 of the synchronization slider 43. Specifically, the third outer peripheral surface 428a of the third helix 423a faces the second synchronization side surface 431c, and the third helix 423a can slide along the second synchronization side surface 431c. A portion of the second helical block 433 of the synchronization slider 43 is located within the third helical opening of the third helix 423a, and the third helical surface 431A of the third helix 423a mates with the third mating surface 433e of the synchronization slider 43. The third helical surface 431A faces the third mating surface 433e, and at least a portion of the third helical surface 431A abuts against the third mating surface 433e. The third end wall surface 429a of the third helix 423a abuts against the third connecting surface of the second helical block 433.

[0264] The fourth helix 423b mates with both the second helical block 433 and the synchronization body 431 of the synchronization slider 43. Specifically, the fourth outer peripheral surface 428b of the fourth helix 423b faces the second synchronization side surface 431c, and the fourth helix 423b can slide along the second synchronization side surface 431c. Another part of the second helical block 433 of the synchronization slider 43 is located inside the fourth helical opening of the fourth helix 423b, and the fourth helical surface 431B of the fourth helix 423b mates with the fourth mating surface 433f of the synchronization slider 43. The fourth helical surface 431B faces the fourth mating surface 433f, and at least a portion of the fourth helical surface 431B abuts against the fourth mating surface 433f. The fourth end wall of the fourth helix 423b faces the fourth connecting surface 433b of the second helical block 433, and the fourth end wall and the fourth connecting surface 433b are spaced apart in the Y-axis direction.

[0265] In this embodiment, reference Figure 4 , Figure 11 and Figure 12The first helix 403a of the first swing arm 41a, the second helix 403b of the second swing arm 41b, the third helix 423a of the third swing arm 42a, the fourth helix 423b of the fourth swing arm 42b, the synchronous slider 43, the first mounting shaft 44a, the second mounting shaft 44b, the first preload member 45a, the second preload member 45b, the third preload member 45c, the fourth preload member 45d, the first adjusting member 46a, the third adjusting member 46b, the second adjusting member 47a, and the fourth adjusting member 47b are all located within the first mounting groove 23 of the bearing base 20. The guide strip 233 within the first mounting groove 23 is at least partially located within the guide groove 431e of the synchronous body 431. The first helix 403a, the second helix 403b, the third helix 423a, and the fourth helix 423a can all slide and rotate relative to the synchronization slider 43. The synchronization slider 43 slides along the guide bar 233 to make the first helix 403a, the second helix 403b, the third helix 423a, and the fourth helix 423a move synchronously. One end of the synchronization slider 43 along the Y-axis is aligned with the first helix 403a of the first swing arm 41a and the third helix 423a of the third swing arm 42a, and the other end of the synchronization slider 43 along the Y-axis is aligned with the second helix 403b of the second swing arm 41b and the fourth helix 423b of the fourth swing arm 42b.

[0266] One end of the first mounting shaft 44a extending out of the first adjusting member 46a is located in the first mounting hole 231, and one end of the first mounting shaft 44a extending out of the first through hole 434a of the first connecting block 434 is fixed in the second mounting hole. One end of the second mounting shaft 44b extending out of the third adjusting member 46b is fixed in the third mounting hole 232, and one end of the second mounting shaft 44b extending out of the second through hole 435a of the second connecting block 435 is fixed in the fourth mounting hole. Specifically, when the first mounting shaft 44a and the second mounting shaft 44b are installed, the mounting block 20b constituting the second mounting hole and the fourth mounting hole is in a disassembled state from the bearing body 20a. One end of the first mounting shaft 44a extending out of the threaded hole of the first adjusting member 46a first extends into the first mounting hole 231, and one end of the first mounting shaft 44a extending out of the first connecting block 434 is located on the portion of the bearing body 20a that constitutes the second mounting hole. One end of the second mounting shaft 44b extending from the threaded hole of the third adjusting member 46b first extends into the third mounting hole 232, and the other end of the second mounting shaft 44b extending from the second connecting block 435 is located on the portion of the bearing body 20a that forms the fourth mounting hole. Then, the mounting blocks 20b forming the second and fourth mounting holes are assembled onto the bearing body 20a, such that one end of the first mounting shaft 44a extending from the first connecting block 434 is located in the second mounting hole, and one end of the second mounting shaft 44b extending from the second connecting block 435 is located in the fourth mounting hole. The side of the first adjusting member 46a facing away from the first pre-compression member 45a faces one wall of the first mounting groove 23, and the side of the first connecting block 434 facing away from the second adjusting member 47a faces the other wall of the first mounting groove 23. The side of the third adjusting member 46b facing away from the third pre-compression member 45c faces one wall of the first mounting groove 23, and the side of the second connecting block 435 facing away from the fourth adjusting member 47b faces the other side of the second mounting groove 24.

[0267] The first adjusting member 46a is threadedly connected to the first mounting shaft 44a. Tightening the first adjusting member 46a allows it to move toward or away from the first preload member 45a on the first mounting shaft 44a, adjusting the force applied to the first preload member 45a and consequently adjusting the preload force provided by the first preload member 45a to the first swing arm 41a. Specifically, when the first adjusting member 46a moves toward the first preload member 45a, it pushes against the first preload member 45a, increasing the compression of the first preload member 45a. This increases the force applied to the first spiral body 403a of the first swing arm 41a, increasing the preload force between the first spiral body 403a and the first spiral block 432, resulting in better contact between the first spiral surface 411a and the first mating surface 432e. When the first adjusting member 46a is turned so that it moves away from the first pre-compression member 45a, the force exerted by the first adjusting member 46a on the first pre-compression member 45a decreases, the compression of the first pre-compression member 45a decreases, and the pre-tightening force between the first spiral body 403a and the first spiral block 432 decreases.

[0268] The second adjusting member 47a is a snap ring. Under the action of external force, the position of the second adjusting member 47a snapping onto the first mounting shaft 44a can be changed, thereby adjusting the force applied by the second adjusting member 47a to the second preload member 45b, ultimately achieving the purpose of adjusting the preload force provided by the second preload member 45b to the second swing arm 41b. Specifically, when the second adjusting member 47a moves closer to the second preload member 45b under the action of external force, the force applied by the second adjusting member 47a to the second preload member 45b increases, and the compression of the second preload member 45b becomes greater. Consequently, the force applied by the second preload member 45b to the second spiral body 403b increases, thereby increasing the preload force between the second spiral body 403b and the first spiral block 432, so that the second spiral surface 411b and the second mating surface 432e can better abut. When the second adjusting member 47a moves away from the second pre-compression member 45b under the action of an external force, the force exerted by the second adjusting member 47a on the second pre-compression member 45b decreases. Therefore, the compression of the second pre-compression member 45b decreases, and at this time, the force exerted by the second pre-compression member 45b on the second spiral body 403b decreases, thereby reducing the preload between the second spiral body 403b and the first spiral block 432.

[0269] It is understandable that the external force acting on the second adjusting component 47a can be achieved by the assembly personnel manually or with the aid of certain tools, removing the second adjusting component 47a from the first mounting shaft 44a. Then, the second adjusting component 47a is manually or with the aid of certain tools reinstalled onto the first mounting shaft 44a. The reinstalled second adjusting component 47a will have a different position along the Y-axis from its previous position on the first mounting shaft 44a. Once the second adjusting component 47a is installed on the first mounting shaft 44a, its position on the first mounting shaft 44a will not change during the normal folding and unfolding process of the rotating mechanism 100. In other words, the position of the second adjusting component 47a on the first mounting shaft 44a is fixed when no external force is applied.

[0270] The third adjusting member 46b is threadedly connected to the second mounting shaft 44b. Tightening the third adjusting member 46b allows it to move toward or away from the third preload member 45c on the second mounting shaft 44b, adjusting the force applied by the third adjusting member 46b to the third preload member 45c, thereby adjusting the preload force provided by the third preload member 45c to the third swing arm 42a. Specifically, when the third adjusting member 46b is tightened and moves toward the third preload member 45c, it pushes against the third preload member 45c, increasing the compression of the third preload member 45c. This increases the force applied to the third spiral body 423a of the third swing arm 42a, increasing the preload force between the third spiral body 423a and the second spiral block 433, resulting in better contact between the third spiral surface 431A and the third mating surface 433e.

[0271] When the third adjusting member 46b is turned so that it moves away from the third pre-compression member 45c, the force exerted by the third adjusting member 46b on the third pre-compression member 45c decreases, the compression amplitude of the third pre-compression member 45c decreases, and the pre-tightening force between the third spiral body 423a and the second spiral block 433 decreases. The forces acting on the third oscillating body 421a, the fourth oscillating body 421b, and the fourth spiral body 423b also decrease synchronously, the compression amplitude of the fourth pre-compression member 45d decreases, and the pre-tightening force between the fourth spiral body 423b and the second spiral block 433 decreases.

[0272] The fourth adjusting member 47b is a snap ring. Under external force, the position of the fourth adjusting member 47b engaged with the second mounting shaft 44b can be changed, thereby adjusting the force applied by the fourth adjusting member 47b to the fourth preload member 45d, ultimately achieving the purpose of adjusting the preload force provided by the fourth preload member 45d to the fourth swing arm 42b. Specifically, when the fourth adjusting member 47b moves closer to the fourth preload member 45d under the action of external force, the force applied by the fourth adjusting member 47b to the fourth preload member 45d increases. Therefore, the compression of the fourth preload member 45d increases, and the force applied by the fourth preload member 45d to the fourth spiral body 423b increases, thereby increasing the preload force between the fourth spiral body 423b and the second spiral block 433, so that the fourth spiral surface 431B and the fourth mating surface 433f can better abut. When the fourth adjusting member 47b moves away from the fourth pre-compression member 45d under the action of an external force, the force exerted by the fourth adjusting member 47b on the fourth pre-compression member 45d decreases. Therefore, the compression amplitude of the fourth pre-compression member 45d decreases, and the force exerted by the fourth pre-compression member 45d on the fourth spiral body 423b decreases, thereby reducing the preload between the fourth spiral body 423b and the second spiral block 433.

[0273] It is understandable that the external force acting on the fourth adjusting component 47b can be achieved by the assembly personnel manually or with the aid of certain tools, removing the fourth adjusting component 47b from the second mounting shaft 44b. Then, the fourth adjusting component 47b is manually or with the aid of certain tools reinstalled onto the second mounting shaft 44b. The reinstalled fourth adjusting component 47b will have a different position along the Y-axis from its previous position on the first mounting shaft 44a. Once the fourth adjusting component 47b is installed on the second mounting shaft 44b, its position on the second mounting shaft 44b will not change during the normal folding and unfolding process of the rotating mechanism 100. In other words, the position of the fourth adjusting component 47b on the second mounting shaft 44b is fixed when no external force is applied.

[0274] The first connecting body 402a of the first swing arm 41a and the second connecting body 402b of the second swing arm 41b extend from one side of the first mounting groove 23. The first swing body 401a of the first swing arm 41a and the second swing body 401b of the second swing arm 41b are located within the first synchronous slide groove 112 of the first fixed plate 11. The first swing body 401a and the second swing body 401b can slide within the first synchronous slide groove 112.

[0275] The third connecting body 422a of the third swing arm 42a and the fourth connecting body 422b of the fourth swing arm 42b extend out of the first mounting groove 23 from the other side of the first mounting groove 23. The third swing body 421a of the third swing arm 42a and the fourth swing body 421b of the fourth swing arm 42b are located within the second synchronous slide groove 122 of the second fixed plate 12. The third swing body 421a and the fourth swing body 421b can slide within the second synchronous slide groove 122.

[0276] In this embodiment, reference Figure 4 , Figure 16 and Figure 17 A portion of the first sliding member 53 is located between the first rotating cylinder 512a and the second rotating cylinder 512b, and another portion of the first sliding member 53 is located between the third rotating cylinder 522a and the fourth rotating cylinder 522b. A portion of the second sliding member 54 is located between the first rotating cylinder 512a and the second rotating cylinder 512b, and another portion of the second sliding member 54 is located between the third rotating cylinder 522a and the fourth rotating cylinder 522b. The first concave cam 512c meshes with the first mating wheel 532, the second concave cam 512d meshes with the second mating wheel 542, the third concave cam 522c meshes with the third mating wheel 533, and the fourth concave cam 522d meshes with the fourth mating wheel 543. That is, the first protrusion is located within the first mating recess; the second protrusion is located within the second mating recess; the third protrusion is located within the third mating recess; and the fourth protrusion is located within the fourth mating recess. The number, distribution, shape, and size of the first to fourth protrusions and the first to fourth mating protrusions are all the same. This results in strong meshing stability between the first concave cam 512c, the second concave cam 512d, the third concave cam 522c, and the fourth concave cam 522d and the first mating wheel 532, the second mating wheel 542, the third mating wheel 533, and the fourth mating wheel 543, respectively.

[0277] The first elastic element 551, the third elastic element 553, the fourth elastic element 554, and the second elastic element 552 are arranged sequentially along the X-axis, and all of them are located between the first sliding element 53 and the second sliding element 54. The two ends of each of the first elastic element 551, the third elastic element 553, the fourth elastic element 554, and the second elastic element 552 respectively abut against the first sliding element 53 and the second sliding element 54.

[0278] The first rotating hole 512e, the second rotating hole 512f, the first connecting hole 534, the second connecting hole 544, the first mounting hole 231, and the second mounting hole are coaxial. The third rotating hole 522e, the fourth rotating hole 522f, the third connecting hole 535, the fourth connecting hole 545, the third mounting hole 232, and the fourth mounting hole are coaxial. The fifth connecting hole 536 and the sixth connecting hole 546 are coaxial, and the seventh connecting hole 537 and the eighth connecting hole 547 are coaxial. The first connecting rod 56a passes sequentially through the first rotating hole 512e, the first connecting hole 534, the hollow part of the first elastic member 551, the second connecting hole 544, and the second rotating hole 512f, and the two ends of the first connecting rod 56a are respectively fixed in the first mounting hole 231 and the second mounting hole. The second connecting rod 56b passes sequentially through the third rotating hole 522e, the third connecting hole 535, the hollow portion of the second elastic member 552, the fourth connecting hole 545, and the fourth rotating hole 522f, with both ends of the second connecting rod 56b fixed in the third mounting hole 232 and the fourth mounting hole, respectively. The third connecting rod 56c passes through the hollow portion of the third elastic member 553, with both ends of the third connecting rod 56c fixed in the fifth connecting hole 536 and the sixth connecting hole 546, respectively. The fourth connecting rod 56d passes through the hollow portion of the fourth elastic member 554, with both ends of the fourth connecting rod 56d fixed in the seventh connecting hole 537 and the eighth connecting hole 547, respectively.

[0279] In other words, the first elastic element 551 is sleeved on the first connecting rod 56a, the second elastic element 552 is sleeved on the second connecting rod 56b, the third elastic element 553 is sleeved on the third connecting rod 56c, and the fourth elastic element 554 is sleeved on the fourth connecting rod 56d. The two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553, and the fourth elastic element 554 are pre-compressed by the first sliding element 53 and the second sliding element 54, so that the first elastic element 551, the second elastic element 552, the third elastic element 553, and the fourth elastic element 554 provide pre-tightening force for the first fixed plate 11 and the second fixed plate 12, so that the first fixed plate 11 and the second fixed plate 12 can be kept in the unfolded state or the folded state.

[0280] In this embodiment, at least a portion of the first rotating body 512 of the first damping swing arm 51, at least a portion of the second rotating body 522 of the second damping swing arm 52, the first sliding member 53, the second sliding member 54, the first elastic member 551, the second elastic member 552, the third elastic member 553, the fourth elastic member 554, the first connecting rod 56a, the second connecting rod 56b, the third connecting rod 56c, and the fourth connecting rod 56d are all located within the second mounting groove 24 of the bearing base 20. The portion of the first connecting rod 56a extending out of the first rotating cylinder 512a is fixed within the first fastening hole 242, and the portion of the first connecting rod 56a extending out of the second rotating cylinder 512b is fixed within the second fastening hole.

[0281] A portion of the guide bar 241 is located in the first guide groove 538, and another portion of the guide bar 241 is located in the second guide groove 548. Both the first slider 531 and the second slider 541 can move along the guide bar 241 so that the guide bar 241 guides the movement of the first slider 53 and the second slider 54 in the Y-axis direction, thereby preventing the first slider 53 and the second slider 54 from shaking when moving in the Y-axis direction, so as to make the movement of the first slider 53 and the second slider 54 more stable.

[0282] The first sliding body 511 of the first damping swing arm 51 is rotatably connected to the first fixed plate 11. Specifically, at least a portion of the first sliding arm 514 and the first sliding cylinder 516 are located within the first damping groove 113, and at least a portion of the second sliding arm 515 and the second sliding cylinder 517 are located within the second damping groove 114. In other words, a portion of the first guide block 115 is located between the first sliding arm 514 and the second sliding arm 515, and another portion of the first guide block 115 is located between the first sliding cylinder 516 and the second sliding cylinder 517. The first connecting shaft passes through the first guide groove 116, and both ends of the first connecting shaft are fixed within the first sliding hole 516a and the second sliding hole 517a, respectively. The first connecting shaft can slide and rotate within the first guide groove 116, so that the first sliding cylinder 516 and the second sliding cylinder 517 can slide and rotate, thereby realizing the sliding and rotation of the first damping swing arm 51 relative to the first fixed plate 11.

[0283] When installing the first connecting shaft, first position the first sliding cylinder 516 and the second sliding cylinder 517 within the first clearance groove 117, then pass the first connecting shaft sequentially through the first sliding hole 516a, the first guide groove 538, and the second sliding hole 517a from the first clearance groove 117, and then move the first sliding cylinder 516 and the second sliding cylinder 517 to be respectively located within the first damping groove 113 and the second damping groove 114.

[0284] The second sliding body 521 of the second damping swing arm 52 is rotatably connected to the second fixed plate 12. Specifically, at least a portion of the third sliding arm 524 and the third sliding cylinder 526 are located within the third damping groove 123, and at least a portion of the fourth sliding arm 525 and the fourth sliding cylinder 527 are located within the fourth damping groove 124. In other words, a portion of the second guide slider 125 is located between the third sliding arm 524 and the fourth sliding arm 525, and another portion of the second guide slider 125 is located between the third sliding cylinder 526 and the fourth sliding cylinder 527. The second connecting shaft passes through the second guide groove 126, and its two ends are respectively fixed within the third sliding hole 526a and the fourth sliding hole 527a. The second connecting shaft can slide and rotate within the second guide groove 126, so that the third sliding cylinder 526 and the fourth sliding cylinder 527 can slide and rotate, thereby realizing the sliding and rotation of the second damping swing arm 52 relative to the second fixed plate 12.

[0285] When installing the second connecting shaft, first position the third sliding cylinder 526 and the fourth sliding cylinder 527 within the second clearance groove 127, then pass the second connecting shaft sequentially through the third sliding hole 526a, the second guide groove 548, and the fourth sliding hole 527a from the second clearance groove 127, and then move the third sliding cylinder 526 and the fourth sliding cylinder 527 to be located within the third damping groove 123 and the fourth damping groove 124, respectively.

[0286] In this embodiment, when the rotating mechanism 100 is in the unfolded state, the angle between the first fixed plate 11 and the second fixed plate 12 is 180 degrees (including tolerance range), and the angle between the first main swing arm 31 and the second main swing arm 32 is 180 degrees (including tolerance range). The angle between the first synchronous swing arm 41 and the second synchronous swing arm 42 is 180 degrees (including tolerance range), specifically, the angle between the first swing arm 41a and the third swing arm 42a is 180 degrees, and the angle between the second swing arm 41b and the fourth swing arm 42b is 180 degrees. The angle between the first damping swing arm 51 and the second damping swing arm 52 is 180 degrees (including tolerance range).

[0287] refer to Figure 22 and Figure 23 , Figure 22 yes Figure 4 The schematic diagram shows the structure of the rotating mechanism 100 switching from the unfolded state to the folded state. Figure 23 yes Figure 22 Partial cross-sectional view of the rotating mechanism 100 shown.

[0288] When the rotating mechanism 100 switches from the unfolded state to the folded state, the first fixed plate 11 rotates counterclockwise relative to the bearing base 20. The first main sliding body 312 of the first main swing arm 31 slides within the first main slide groove 21 and rotates counterclockwise, while the first main rotating body 311 of the first main swing arm 31 rotates counterclockwise around the first fixed shaft 33. The first swing body 401a of the first swing arm 41a and the second swing body 401b of the second swing arm 41b slide within the first synchronous slide groove 112 and rotate counterclockwise. The first spiral body 403a of the first swing arm 41a and the second spiral body 403b of the second swing arm 41b rotate counterclockwise around the first mounting shaft 44a. During the rotation of the first spiral body 403a, the first spiral surface 411a gradually pushes against the first mating surface 432e, causing the synchronous slider 43 to slide along the guide strip 233 in the negative direction of the Y-axis. At this time, the first spiral block 432 gradually slides out from the first spiral opening of the first spiral body 403a. During the rotation of the second helix 403b, the second mating surface 432f slides along the second helical surface 411b, and the first helical block 432 gradually slides into the second helical opening.

[0289] When the synchronous slider 43 slides in the negative Y-axis direction, the fourth mating surface 433f gradually pushes against the fourth helical surface 431B, the third mating surface 433e slides along the third helical surface 431A, and the second helical block 433 gradually slides out from the third helical opening and into the fourth helical opening. This causes the fourth helical body 423b of the fourth swing arm 42b to rotate clockwise around the second mounting shaft 44b, and the third helical body 423a of the third swing arm 42a to rotate clockwise around the second mounting shaft 44b. The third swing body 421a of the third swing arm 42a and the fourth swing body 421b of the fourth swing arm 42b slide and rotate clockwise within the second synchronous slide groove 122. This, in turn, drives the second fixed plate 12 to rotate clockwise, causing the second fixed plate 12 and the first fixed plate 11 to fold synchronously.

[0290] The first sliding body 511 of the first damping swing arm 51 rotates counterclockwise around the first connecting shaft, while the first connecting shaft slides within the first guide groove 116, causing the first sliding body 511 to slide within the first guide groove 116. The first rotating body 512 of the first damping swing arm 51 rotates counterclockwise around the first connecting rod 56a, so that the first protrusion gradually moves out of the first mating recess, and the second protrusion gradually moves out of the second mating recess. At this time, the positions of the first rotating cylinder 512a and the second rotating cylinder 512b along the Y-axis remain unchanged. The first concave cam 512c pushes the first mating wheel 532, and the second concave cam 512d pushes the third mating wheel 533, so that the first mating wheel 532 and the second mating wheel 542 move closer to each other, the first slider 531 and the second slider 541 move closer to each other, and the two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553 and the fourth elastic element 554 are compressed synchronously, thereby providing damping force for the first fixed plate 11.

[0291] When the rotating mechanism 100 switches from the unfolded state to the folded state, the second fixed plate 12 rotates clockwise relative to the bearing base 20. The second main sliding body 322 of the second main swing arm 32 slides within the second main slide groove 22 and rotates clockwise, while the second main rotating body 321 of the second main swing arm 32 rotates clockwise around the second fixed shaft 34. The third swing body 421a of the third swing arm 42a and the fourth swing body 421b of the fourth swing arm 42b slide within the second synchronous slide groove 122 and rotate clockwise. The third spiral body 423a of the third swing arm 42a and the fourth spiral body 423b of the fourth swing arm 42b rotate clockwise around the second mounting shaft 44b. During the rotation of the third spiral body 423a, the third spiral surface 431A gradually pushes against the third mating surface 433e, causing the synchronous slider 43 to slide along the guide bar 233 in the negative direction of the Y-axis. During the rotation of the fourth spiral body 423b, the fourth mating surface 433f slides along the fourth spiral surface 431B. The second spiral block 433 gradually slides out from the third spiral opening of the third spiral body 423a and gradually slides into the fourth spiral opening.

[0292] When the synchronous slider 43 slides along the guide bar 233 in the negative direction of the Y-axis, the second mating surface 432f gradually pushes against the second helical surface 411b, and the first mating surface 432e of the first helical block 432 slides along the first helical surface 411a of the first helical body 403a. The first helical block 432 gradually slides out from the first helical opening of the first helical body 403a and gradually slides into the second helical opening. The first swing body 401a of the first swing arm 41a and the second swing body 401b of the second swing arm 41b slide within the first synchronous slide groove 112 and rotate counterclockwise. The first helical body 403a of the first swing arm 41a and the second helical body 403b of the second swing arm 41b rotate counterclockwise around the first mounting shaft 44a. This, in turn, drives the first fixing plate 11 to rotate counterclockwise, causing the first fixing plate 11 and the second fixing plate 12 to fold synchronously.

[0293] The first swing body 401a and the second swing body 401b are connected, enabling the first swing arm 41a and the second swing arm 41b to move synchronously. The third swing body 421a and the fourth swing body 421b are connected, enabling the third swing arm 42a and the fourth swing arm 42b to move synchronously. The first helical block 432 of the synchronous slider 43 is connected to the first helical body 403a and the second helical body 403b respectively, and the second helical block 433 of the synchronous slider 43 cooperates with the third helical body 423a and the fourth helical body 423b respectively, so that the first synchronous swing arm 41 and the second synchronous swing arm 42 can rotate simultaneously, thereby achieving the synchronicity of the movement of the first fixed plate 11 and the second fixed plate 12, and ensuring the synchronicity of the movement of the first housing and the second housing.

[0294] The second sliding body 521 of the second damping swing arm 52 rotates counterclockwise around the second connecting shaft, while the second connecting shaft slides within the second guide groove 126, causing the second sliding body 521 to slide within the second guide groove 126. The second rotating body 522 of the second damping swing arm 52 rotates clockwise around the second connecting rod 56b, so that the third protrusion gradually moves out of the third mating recess, and the fourth protrusion gradually moves out of the fourth mating recess. At this time, the positions of the third rotating cylinder 522a and the fourth rotating cylinder 522b along the Y-axis remain unchanged. The third concave cam 522c pushes the third mating wheel 533, and the fourth concave cam 522d pushes the fourth mating wheel 543, so that the third mating wheel 533 and the fourth mating wheel 543 move closer to each other, the first slider 531 and the second slider 541 move closer to each other, and the two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553 and the fourth elastic element 554 are compressed synchronously, thereby providing damping force for the second fixed plate 12.

[0295] That is, when the rotating mechanism 100 switches from the unfolded state to the folded state, the first sliding member 53 and the second sliding member 54 slide towards each other under the action of the first damping swing arm 51 and the second damping swing arm 52. At this time, both ends of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are gradually compressed synchronously. During the process of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 being gradually compressed, they can provide damping force to the first fixed plate 11 and the second fixed plate 12, thereby allowing the user to obtain a damping feel. This damping force is twice that of an elastic member that is compressed at one end, resulting in a better damping feel.

[0296] refer to Figure 24 and Figure 25 , Figure 24 yes Figure 4 A schematic diagram of the rotating mechanism 100 in a folded state is shown. Figure 25 yes Figure 23 A partial cross-sectional view of the rotating mechanism 100 shown.

[0297] When the rotating mechanism 100 is in the folded state, the angle between the first fixed plate 11 and the second fixed plate 12 is 0 degrees (including the tolerance range), and the angle between the first main swing arm 31 and the second main swing arm 32 is 0 degrees (including the tolerance range). The angle between the first synchronous swing arm 41 and the second synchronous swing arm 42 is 0 degrees (including the tolerance range), specifically, the angle between the first swing arm 41a and the third swing arm 42a is 0 degrees, and the angle between the second swing arm 41b and the fourth swing arm 42b is 0 degrees. The angle between the first damping swing arm 51 and the second damping swing arm 52 is 0 degrees (including the tolerance range). The end of the first protrusion of the first concave cam 512c abuts against the end of the first mating protrusion of the first mating wheel 532. The end of the second protrusion of the second concave cam 512d abuts against the end of the second mating protrusion of the second mating wheel 542. The end of the third protrusion of the third concave cam 522c abuts against the end of the third mating protrusion of the third mating wheel 533. The fourth protrusion of the fourth concave cam 522d abuts against the end of the fourth mating protrusion of the fourth mating wheel 543. One end of the synchronizer slider 43 along the Y-axis is misaligned with the first helix 403a of the first swing arm 41a and the third helix 423a of the third swing arm 42a, and one end of the synchronizer slider 43 is aligned with the middle region of the first helix 403a of the first swing arm 41a and the third helix 423a of the third swing arm 42a. The other end of the synchronizer slider 43 along the Y-axis is misaligned with the second helix 403b of the second swing arm 41b and the fourth helix 423b of the fourth swing arm 42b, and the other end of the synchronizer slider 43 is aligned with the first connecting block 434 and the second connecting block 435.

[0298] When the rotating mechanism 100 switches from the folded state to the unfolded state, the first fixed plate 11 rotates clockwise relative to the bearing base 20. The first main sliding body 312 of the first main swing arm 31 slides within the first main slide groove 21 and rotates clockwise, while the first main rotating body 311 of the first main swing arm 31 rotates clockwise around the first fixed shaft 33. The first swing body 401a of the first swing arm 41a and the second swing body 401b of the second swing arm 41b slide within the first synchronous slide groove 112 and rotate clockwise. The first spiral body 403a of the first swing arm 41a and the second spiral body 403b of the second swing arm 41b rotate clockwise around the first mounting shaft 44a. During the rotation of the second spiral body 403b, the second spiral surface 411b gradually pushes against the second mating surface 432f, causing the synchronous slider 43 to slide along the guide strip 233 in the positive direction of the Y-axis. During the rotation of the first spiral body 403a, the first spiral surface 411a slides along the first mating surface 432e. At this time, the first spiral block 432 gradually slides out from the second spiral opening and gradually slides into the first spiral opening of the first spiral body 403a.

[0299] As the synchronous slider 43 slides along the guide bar 233 in the positive direction of the Y-axis, the third mating surface 433e gradually pushes against the third helical surface 431A, and the fourth mating surface 433f slides along the fourth helical surface 431B; the second helical block 433 gradually slides out from the fourth helical opening and slides into the third helical opening. The third helical body 423a of the third swing arm 42a rotates counterclockwise around the second mounting shaft 44b, causing the fourth helical body 423b of the fourth swing arm 42b to rotate counterclockwise around the second mounting shaft 44b. The third swing body 421a of the third swing arm 42a and the fourth swing body 421b of the fourth swing arm 42b slide and rotate counterclockwise within the second synchronous slide groove 122. This, in turn, drives the second fixed plate 12 to rotate counterclockwise, causing the second fixed plate 12 and the first fixed plate 11 to fold synchronously.

[0300] The first sliding body 511 of the first damping swing arm 51 rotates clockwise around the first connecting shaft, while the first connecting shaft slides within the first guide groove 116, causing the first sliding body 511 to slide within the first guide groove 116. The first rotating body 512 of the first damping swing arm 51 rotates clockwise around the first connecting rod 56a, causing the first protrusion to gradually move into the first mating recess, and the first mating protrusion to gradually move into the first recess; the second protrusion to gradually move into the second mating recess, and the second mating protrusion to gradually move into the second recess. At this time, the positions of the first rotating cylinder 512a and the second rotating cylinder 512b along the Y-axis remain unchanged, the first mating wheel 532 and the second mating wheel 542 move away from each other, the first slider 531 and the second slider 541 move away from each other, and the two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553, and the fourth elastic element 554 are released synchronously, thereby providing damping force to the first fixed plate 11.

[0301] When the rotating mechanism 100 switches from the folded state to the unfolded state, the second fixed plate 12 rotates counterclockwise relative to the bearing base 20. The second main sliding body 322 of the second main swing arm 32 slides within the second main slide groove 22 and rotates counterclockwise, while the second main rotating body 321 of the second main swing arm 32 rotates counterclockwise around the second fixed axis 34. The third swing body 421a of the third swing arm 42a and the fourth swing body 421b of the fourth swing arm 42b slide within the second synchronous slide groove 122 and rotate counterclockwise. The third spiral body 423a of the third swing arm 42a and the fourth spiral body 423b of the fourth swing arm 42b rotate counterclockwise around the second mounting axis 44b. During the rotation of the third spiral body 423a, the fourth spiral surface 431B gradually pushes against the fourth mating surface 433f, causing the synchronous slider 43 to slide along the guide bar 233 in the positive direction of the Y-axis. At this time, during the rotation of the fourth spiral body 423b, the third spiral surface 431A slides along the third mating surface 433e. At this time, the second spiral block 433 gradually slides out from the fourth spiral opening and gradually slides into the third spiral opening of the third spiral body 423a.

[0302] As the synchronous slider 43 slides along the guide bar 233 in the positive direction of the Y-axis, the first mating surface 432e gradually pushes against the first helical surface 411, and the second mating surface 432f slides along the second helical surface 411b. The first helical block 432 gradually slides out from the second helical opening of the second helical body 403b and gradually slides into the first helical opening of the first helical body 403a. The first swing body 401a of the first swing arm 41a and the second swing body 401b of the second swing arm 41b slide within the first synchronous slide groove 112 and rotate clockwise. The first helical body 403a of the first swing arm 41a and the second helical body 403b of the second swing arm 41b rotate clockwise around the first mounting shaft 44a. This, in turn, drives the first fixing plate 11 to rotate clockwise, causing the first fixing plate 11 and the second fixing plate 12 to fold synchronously.

[0303] The first swing body 401a and the second swing body 401b are connected, enabling the first swing arm 41a and the second swing arm 41b to move synchronously. The third swing body 421a and the fourth swing body 421b are connected, enabling the third swing arm 42a and the fourth swing arm 42b to move synchronously. The first helical block 432 of the synchronous slider 43 is connected to the first helical body 403a and the second helical body 403b respectively, and the second helical block 433 of the synchronous slider 43 cooperates with the third helical body 423a and the fourth helical body 423b respectively, so that the first synchronous swing arm 41 and the second synchronous swing arm 42 can rotate simultaneously, thereby achieving the synchronicity of the movement of the first fixed plate 11 and the second fixed plate 12, and ensuring the synchronicity of the movement of the first housing and the second housing.

[0304] The second sliding body 521 of the second damping swing arm 52 rotates counterclockwise around the second connecting shaft, while the second connecting shaft slides within the second guide groove 126, causing the second sliding body 521 to slide within the second guide groove 126. The second rotating body 522 of the second damping swing arm 52 rotates counterclockwise around the second connecting rod 56b, causing the third protrusion to gradually move into the third mating recess, and the third mating protrusion to gradually move into the third recess; the fourth protrusion to gradually move into the fourth mating recess, and the fourth mating protrusion to gradually move into the fourth recess. At this time, the positions of the third rotating cylinder 522a and the fourth rotating cylinder 522b along the Y-axis remain unchanged, the third mating wheel 533 and the fourth mating wheel 543 move away from each other, the first slider 531 and the second slider 541 move away from each other, and the two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553, and the fourth elastic element 554 are released synchronously, thereby providing damping force to the second fixed plate 12.

[0305] That is, when the rotating mechanism 100 switches from the folded state to the unfolded state, the first sliding member 53 and the second sliding member 54 slide away from each other under the action of the first damping swing arm 51 and the second damping swing arm 52. At this time, both ends of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are gradually and synchronously released. During the gradual release of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554, damping force can be provided to the first fixed plate 11 and the second fixed plate 12, thereby allowing the user to obtain a damping feel. This damping force is twice that of an elastic member that is released at one end, resulting in a better damping feel.

[0306] In this embodiment, in the synchronization component 40, the first synchronization swing arm 41 is divided into two parts: a first swing arm 41a and a second swing arm 41b. The first swing arm 41a and the second swing arm 41b are connected by a trapezoidal structure, ensuring a reliable connection. In other words, in the assembled state, the first swing arm 41a and the second swing arm 41b are detachably connected; when not assembled, they are separate. Therefore, the first swing arm 41a and the second swing arm 41b are processed independently. The dimensions of the first swing arm 41a and the second swing arm 41b along the length of the rotating mechanism are smaller than those of a one-piece swing arm, thus reducing the processing difficulty, improving processing efficiency, and lowering costs. In particular, after the first swing arm 41a and the second swing arm 41b are separated, they can be processed using molds, significantly increasing processing efficiency and accuracy compared to traditional CNC machining methods.

[0307] Specifically, in the first swing arm 41a, the first through hole 406a of the first helical body 403a penetrates the first helical body 403a along the Y-axis direction. The first through hole 406a is a circular hole, and its diameter remains consistent along the Y-axis direction; that is, the curvature of the first inner circumferential surface 407a remains consistent along the Y-axis direction, without any local protrusions or depressions. Therefore, the first through hole 406a can be machined using a mold, realizing the solution of machining the first helical body 403a using a mold. During mold machining, the material can be ejected along the Y-axis direction.

[0308] In the second swing arm 41b, the second through hole 406b of the second helical body 403b penetrates the first helical body 403a along the Y-axis direction. The second through hole 406b is a circular hole, and its diameter remains consistent along the Y-axis direction. In other words, the curvature of the second inner circumferential surface 407b remains consistent along the Y-axis direction, without any local protrusions or depressions. Therefore, the second through hole 406b can be machined using a mold, realizing the solution of machining the second helical body 403b using a mold. During mold machining, the material can be ejected along the Y-axis direction.

[0309] In the synchronization component 40, the second synchronization swing arm 42 is divided into two parts: a third swing arm 42a and a fourth swing arm 42b. The third swing arm 42a and the fourth swing arm 42b are connected by a trapezoidal structure, ensuring a reliable connection. In other words, in the assembled state, the third swing arm 42a and the fourth swing arm 42b are detachably connected; when not assembled, they are separate units. Therefore, the third swing arm 42a and the fourth swing arm 42b are processed independently. The dimensions of the third swing arm 42a and the fourth swing arm 42b along the length of the rotating mechanism are smaller than those of a single-piece swing arm, thus reducing the processing difficulty, improving processing efficiency, and lowering costs. In particular, after the third swing arm 42a and the fourth swing arm 42b are separated, they can be processed using molds, significantly increasing processing efficiency and accuracy compared to traditional CNC machining methods.

[0310] Specifically, in the third swing arm 42a, the third through hole 426a of the third helical body 423a penetrates the first helical body 403a along the Y-axis direction. The third through hole 426a is a circular hole, and its diameter remains consistent along the Y-axis direction. In other words, the curvature of the third inner circumferential surface 427a remains consistent along the Y-axis direction, without any local protrusions or depressions. Therefore, the third through hole 426a can be machined using a mold, realizing the mold-based machining solution for the third helical body 423a. During mold machining, the part can be ejected along the Y-axis direction.

[0311] In the fourth swing arm 42b, the fourth through hole 426b of the fourth helical body 423b penetrates the first helical body 403a along the Y-axis direction. The fourth through hole 426b is a circular hole, and its diameter remains consistent along the Y-axis direction; that is, the curvature of the fourth inner circumferential surface 427b remains consistent along the Y-axis direction, without any local protrusions or depressions. Therefore, the fourth through hole 426b can be machined using a mold, realizing the mold-based machining solution for the fourth helical body 423b. During mold machining, the part can be ejected along the Y-axis direction.

[0312] In other words, the first synchronous swing arm 41 and the second synchronous swing arm 42 can be manufactured using molds. However, traditional one-piece swing arm designs, due to the presence of a helical structure, cannot be demolded in the Y-axis direction and must be machined using CNC machining. CNC machining is costly, inefficient, and has poor precision. The structure of this application can be machined using molds, reducing costs, improving processing efficiency, and achieving higher precision.

[0313] In this embodiment, the first spiral block 432 and the second spiral block 433 of the synchronous slider 43 can also be processed using a mold. Specifically, a portion of the first inner wall surface 432c forming the hole wall of the first through hole 432a and the remaining portion of the first inner wall surface 432c are connected in the Y-axis direction, and the curvature of the portion of the first inner wall surface 432c forming the hole wall of the first through hole 432a and the remaining portion of the first inner wall surface 432c along the X-axis direction is consistent. That is, the first through hole 432a is a circular hole, and the hole diameter remains unchanged. Thus, when processing the first through hole 432a using a mold, the mold can be ejected along the Y-axis direction, realizing the processing of the first through hole 432a using a mold, and the first mating surface 432e and the first through hole 432a can be processed synchronously. The second mating surface 432f is flush with the groove wall surface of the first ejection groove in the Z-axis direction. When processing the second mating surface 432f using a mold, the mold can be ejected along the Z-axis direction, realizing the processing of the second mating surface 432f using a mold. This allows the first spiral block 432 to be manufactured using a mold.

[0314] The portion of the second inner wall surface 433c forming the second through hole 433a and the remaining portion of the second inner wall surface 433c are connected in the Y-axis direction, and the curvature of the portion of the second inner wall surface 433c forming the second through hole 433a and the remaining portion of the second inner wall surface 433c along the X-axis direction is consistent. That is, the second through hole 433a is a circular hole, and the hole diameter remains unchanged. Therefore, when machining the second through hole 433a using a mold, the mold can be ejected along the Y-axis direction, realizing the machining of the second through hole 433a using a mold, and the third mating surface 433e can be machined simultaneously with the second through hole 433a. The fourth mating surface 433f is flush with the groove wall surface of the second ejection groove 431d in the Z-axis direction. When machining the fourth mating surface 433f using a mold, the mold can be ejected along the Z-axis direction, realizing the machining of the fourth mating surface 433f using a mold. Therefore, the second spiral block 433 can be made using a mold.

[0315] In summary, in this embodiment, the first synchronous swing arm 41, the second synchronous swing arm 42, and the synchronous slider 43 of the synchronization component 40 can all be processed using molds. Compared with the traditional structure that can only be processed by CNC, the structure of the synchronous slider 43 of this application can be processed using molds, which reduces costs, improves processing efficiency, and has higher precision.

[0316] In this embodiment, the stroke of the first sliding member 53 and the second sliding member 54 pressing the first elastic member 551, the second elastic member 552, the third elastic member 553 and the fourth elastic member 554 is as follows: Assume that the height from the first protrusion to the fourth protrusion and from the first mating protrusion to the fourth mating protrusion along the Y-axis is U. When the first protrusion of the first concave cam 512c, the second protrusion of the second concave cam 512d, the third protrusion of the third concave cam 522c, and the fourth protrusion of the fourth concave cam 522d are respectively located in the first mating recess of the first mating wheel 532, the second mating recess of the second mating wheel 542, the third mating recess of the third mating wheel 533 and the fourth mating recess of the fourth mating wheel 543, the distance between the surface of the first slider 531 away from the first concave cam 512c and the surface of the second slider 541 away from the third concave cam 522c is V.

[0317] When the first protrusion of the first concave cam 512c, the second protrusion of the second concave cam 512d, the third protrusion of the third concave cam 522c, and the fourth protrusion of the fourth concave cam 522d respectively abut against the ends of the first mating protrusion of the first mating wheel 532, the second mating protrusion of the second mating wheel 542, the third mating protrusion of the third mating wheel 533, and the fourth mating protrusion of the fourth mating wheel 543, the distance between the surface of the first slider 531 away from the first concave cam 512c and the surface of the second slider 541 away from the third concave cam 522c is W, and W = VU. In other words, the distance the first slider 53 moves in the negative direction of the Y-axis is U, and the distance the second slider 54 moves in the positive direction of the Y-axis is U.

[0318] Before compression, the lengths of both the first elastic element 551 and the second elastic element 552 are equal to the distance V between the surface of the first slider 531 facing away from the first concave cam 512c and the surface of the second slider 541 facing away from the third concave cam 522c. After compression, the lengths of both the first elastic element 551 and the second elastic element 552 are equal to the distance W between the surface of the first slider 531 facing away from the first concave cam 512c and the surface of the second slider 541 facing away from the third concave cam 522c. Since W = VU, the compression strokes of both ends of the first elastic element 551 and the second elastic element 552 are both U.

[0319] Similarly, during the process of the rotating mechanism 100 switching from the folded state to the unfolded state, the synchronous rebound strokes of both ends of the first elastic element 551 are U, and the synchronous rebound strokes of both ends of the second elastic element 552 are U.

[0320] As can be seen from the above, the two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553 and the fourth elastic element 554 are compressed or released simultaneously. Compared with the scheme where only one end of the elastic element is compressed or released, the two ends of the first elastic element 551, the second elastic element 552, the third elastic element 553 and the fourth elastic element 554 are all compressed or released simultaneously, which can provide double the damping force.

[0321] Furthermore, the first elastic element 551, the second elastic element 552, the third elastic element 553, and the fourth elastic element 554 are compressed simultaneously. Compared to a scheme where only one end of the elastic element is compressed, the height U along the Y-axis of the first protrusion to the fourth protrusion and the first mating protrusion to the fourth mating protrusion can be set to be smaller, specifically half that of the scheme where only one end is compressed. With a smaller height, wear on the first protrusion to the fourth protrusion and the first mating protrusion to the fourth mating protrusion can be reduced, thereby extending the lifespan of the first protrusion to the fourth protrusion and the first mating protrusion to the fourth mating protrusion, and consequently extending the lifespan of the first concave cam 512c to the fourth concave cam 522d and the first mating wheel 532 to the fourth mating wheel 543.

[0322] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotating mechanism, characterized by comprising: The invention relates to a foldable electronic device, which includes a first housing and a second housing. The rotating mechanism is used to connect the first housing and the second housing. The rotating mechanism includes: a support base, a synchronous slider, a first synchronous swing arm, a second synchronous swing arm, a first fixing plate, and a second fixing plate. The synchronous slider is disposed on the bearing base, and the synchronous slider includes a synchronous body, a first spiral block and a second spiral block that are fixedly connected. One end of the first synchronous swing arm is slidably and rotatably connected to the first fixed plate, and one end of the second synchronous swing arm is slidably and rotatably connected to the second fixed plate; The first synchronous swing arm includes a first swing arm and a second swing arm, the first swing arm and the second swing arm are detachably connected, the first swing arm is provided with a first helix, the second swing arm is provided with a second helix, the second synchronous swing arm includes a third swing arm and a fourth swing arm, the third swing arm and the fourth swing arm are detachably connected, the third swing arm is provided with a third helix, and the fourth swing arm is provided with a fourth helix. The first and second helical bodies cooperate with the first helical block, and the third and fourth helical bodies cooperate with the second helical block. When the first or second synchronous swing arm rotates relative to the bearing base, it drives the synchronous slider to slide along the bearing base, so that the first and second synchronous swing arms rotate synchronously relative to the bearing base.

2. The swivel mechanism of claim 1, wherein The first synchronous swing arm and the second synchronous swing arm rotate synchronously relative to the bearing base, so that the first fixed plate and the second fixed plate rotate synchronously relative to the bearing base.

3. The swivel mechanism of claim 1, wherein, The first spiral block includes a first mating surface and a second mating surface, the first mating surface and the second mating surface being located on both sides of the first spiral block along the length direction of the bearing base; The first helical body is provided with a first helical surface, and the second helical body is provided with a second helical surface. The first helical surface abuts and engages with the first mating surface, and the second helical surface abuts and engages with the second mating surface.

4. The swivel mechanism of claim 3, wherein, The second spiral block includes a third mating surface and a fourth mating surface, the third mating surface and the fourth mating surface being located on both sides of the second spiral block along the length direction of the bearing base; The third helix is ​​provided with a third helical surface, and the fourth helix is ​​provided with a fourth helical surface. The third helical surface abuts and engages with the third mating surface, and the fourth helical surface abuts and engages with the fourth mating surface.

5. The swivel mechanism of claim 3, wherein Both the first mating surface and the second mating surface are helical surfaces.

6. The swivel mechanism of claim 4, wherein, Both the third mating surface and the fourth mating surface are helical surfaces.

7. The swivel mechanism of claim 6, wherein, The support base is provided with a first mounting groove, and the first synchronous swing arm, the second synchronous swing arm, and the synchronous slider are mounted in the first mounting groove.

8. The rotating mechanism according to claim 3, characterized in that, The rotating mechanism further includes a first pre-compression component and a second pre-compression component. Under the action of the first pre-compression component and the second pre-compression component, the first swing arm and the second swing arm respectively abut against the synchronous slider.

9. The rotating mechanism according to claim 8, characterized in that, The first pre-compression component is disposed on the side of the first spiral body along the bearing base away from the first spiral block, and the second pre-compression component is disposed on the side of the second spiral body along the bearing base away from the first spiral block.

10. The rotating mechanism according to claim 9, characterized in that, The rotating mechanism further includes a third pre-compression component and a fourth pre-compression component; Under the action of the third pre-compression component and the fourth pre-compression component, the third swing arm and the fourth swing arm respectively abut against the synchronous slider.

11. The rotating mechanism according to claim 10, characterized in that, The third pre-compression component is disposed on the side of the third spiral body along the bearing base away from the second spiral block, and the fourth pre-compression component is disposed on the side of the fourth spiral body along the bearing base away from the second spiral block.

12. The rotating mechanism according to any one of claims 1-11, characterized in that, A guide bar is provided on the side of the bearing base opposite to the synchronous slider; a guide groove is provided on the side of the synchronous slider opposite to the bearing base, and the guide bar slides in cooperation with the guide groove.

13. The rotating mechanism according to any one of claims 1-11, characterized in that, The rotating mechanism further includes a first main swing arm and a second main swing arm, which are located on both sides of the bearing base. The first main swing arm and the second main swing arm are slidably and rotatably connected to the bearing base, and are rotatably connected to the first fixed plate and the second fixed plate, respectively.

14. The rotating mechanism according to claim 13, characterized in that, The first main swing arm and the second main swing arm are offset along the length direction of the bearing base.

15. The rotating mechanism according to any one of claims 1-11, characterized in that, One of the first swing arm and the second swing arm is provided with a snap-fit ​​groove, and the other is provided with a snap-fit ​​block; the snap-fit ​​block snaps into the snap-fit ​​groove.

16. The rotating mechanism according to claim 15, characterized in that, The first swing arm has an alternating first locking groove and a first locking block on one side; the second swing arm has an alternating second locking groove and a second locking block on one side; the first locking block is locked into the second locking groove, and the second locking block is locked into the first locking groove.

17. The rotating mechanism according to claim 16, characterized in that, One of the third and fourth swing arms is provided with a snap-fit ​​groove, and the other is provided with a snap-fit ​​block; the snap-fit ​​block snaps into the snap-fit ​​groove.

18. The rotating mechanism according to claim 17, characterized in that, The third swing arm has alternating third locking slots and third locking blocks on one side; the fourth swing arm has alternating fourth locking slots and fourth locking blocks on one side; the third locking block is engaged in the fourth locking slot, and the fourth locking block is engaged in the third locking slot.

19. The rotating mechanism according to claim 16, characterized in that, Both the first snap-fit ​​block and the first snap-fit ​​groove are trapezoidal in shape. The long bottom edge of the first snap-fit ​​block is aligned with the opening of the first snap-fit ​​groove, and the short bottom edge of the first snap-fit ​​block is aligned with the bottom surface of the groove. Both the second snap-fit ​​block and the second snap-fit ​​groove are trapezoidal in shape. The long bottom edge of the second snap-fit ​​block is aligned with the opening of the second snap-fit ​​groove, and the short bottom edge of the second snap-fit ​​block is aligned with the bottom surface of the groove.

20. The rotating mechanism according to any one of claims 1-11, characterized in that, The first swing arm further includes a first swing body and a first connecting body, which are sequentially connected along the width direction of the rotating mechanism; the first swing body is slidably and rotatably connected to the first fixed plate, and the first spiro is rotatably connected to the bearing base; The second swing arm further includes a second swing body and a second connecting body, which are sequentially connected along the width direction of the rotating mechanism; the second swing body is slidably and rotatably connected to the first fixed plate, and the second spiro is rotatably connected to the bearing base.

21. The rotating mechanism according to any one of claims 8-11, characterized in that, The rotating mechanism further includes a first mounting shaft, which is fixedly connected to the bearing base; The first helical body is further provided with a first through hole, the axis of which is parallel to the length direction of the rotating mechanism; the first mounting shaft passes through the first through hole; the first helical body is capable of rotating around the first mounting shaft; the first helical surface extends helically around the first through hole.

22. The rotating mechanism according to claim 21, characterized in that, The second helical body is also provided with a second through hole, the axis of which is parallel to the length direction of the rotating mechanism. The second through hole is coaxial with the first through hole, and the first mounting shaft also passes through the second through hole. The second helical body can rotate around the first mounting shaft. The second helical surface extends spirally around the second through hole.

23. The rotating mechanism according to claim 21, characterized in that, The synchronous body is slidably mounted on the bearing base; the first spiral block is also provided with a first through hole; The first through hole extends through the first spiral block along the length of the rotating mechanism. The first through hole is coaxial with the first through hole, and the first mounting shaft also passes through the first through hole. The first mating surface extends spirally around the first through hole in the axial direction. The first spiral block can slide along the first mounting shaft.

24. The rotating mechanism according to claim 23, characterized in that, The first spiral block is further provided with a first connecting surface, a second connecting surface, a first inner wall surface and a first outer wall surface; the first inner wall surface and the first outer wall surface are opposite to each other along the length direction of the rotating mechanism, and the first through hole penetrates the first connecting surface and the second connecting surface; a part of the first inner wall surface is the hole wall surface of the first through hole, and the first outer wall surface is opposite to the first inner wall surface; One end of the first mating surface is connected to the first connecting surface, and the other end of the first mating surface extends away from the first connecting surface and is connected to the synchronization body; one end of the second mating surface is connected to the second connecting surface, and the other end of the second mating surface extends away from the second connecting surface and is connected to the synchronization body.

25. The rotating mechanism according to claim 21, characterized in that, The bearing base includes a first mounting groove, and the first mounting shaft is located in the first mounting groove. The two ends of the first mounting shaft are respectively fixedly connected to two opposite groove walls of the first mounting groove.

26. The rotating mechanism according to claim 25, characterized in that, The synchronization slider further includes a first connecting block, which is fixedly connected to the synchronization body and located on the same side of the synchronization body as the first spiral block; the first connecting block is provided with a first through hole, which is coaxial with the first through hole, and the first mounting shaft also passes through the first through hole; Both the first pre-compression member and the second pre-compression member are sleeved on the first mounting shaft; the first pre-compression member is located between the first spiral body and the groove wall of the first mounting groove to provide pre-tightening force for the engagement of the first spiral surface and the first mating surface; the second pre-compression member is located between the first spiral body and the first connecting block to provide pre-tightening force for the engagement of the second spiral surface and the second mating surface.

27. The rotating mechanism according to claim 26, characterized in that, The rotating mechanism further includes a first adjusting member, which is sleeved on the first mounting shaft; the first adjusting member is located between the groove wall of the first mounting groove and the first pre-compression member; The position of the first adjusting member in the axial direction of the first mounting shaft can be adjusted so that the first adjusting member moves toward or away from the first preload member; when the first adjusting member moves toward the first preload member, the force applied by the first adjusting member to the first preload member increases, and the preload force provided by the first preload member increases; when the first adjusting member moves away from the first preload member, the force applied by the first adjusting member to the first preload member decreases, and the preload force provided by the first preload member decreases.

28. The rotating mechanism according to claim 27, characterized in that, The rotating mechanism further includes a second adjusting member, which is sleeved on the first mounting shaft; the second adjusting member is located between the first connecting block and the second pre-compression member. The position of the second adjusting member in the axial direction of the first mounting shaft can be adjusted so that the second adjusting member moves toward or away from the second preload member; when the second adjusting member moves toward the second preload member, the force applied by the second adjusting member to the second preload member increases, and the preload provided by the second preload member increases; when the second adjusting member moves away from the second preload member, the force applied by the second adjusting member to the second preload member decreases, and the preload provided by the second preload member decreases.

29. The rotating mechanism according to any one of claims 1-11, characterized in that, The rotating mechanism further includes a fixing component, which includes a first fixing plate and a second fixing plate. The first fixing plate is connected to the first housing, and the second fixing plate is connected to the second housing.

30. The rotating mechanism according to claim 12, characterized in that, The rotating mechanism further includes a first main swing arm and a second main swing arm, which are located on both sides of the bearing base. The first main swing arm and the second main swing arm are slidably and rotatably connected to the bearing base, and are rotatably connected to the first fixed plate and the second fixed plate, respectively.

31. The rotating mechanism according to claim 30, characterized in that, The first main swing arm and the second main swing arm are offset along the length direction of the bearing base.

32. The rotating mechanism according to claim 12, characterized in that, One of the first swing arm and the second swing arm is provided with a snap-fit ​​groove, and the other is provided with a snap-fit ​​block; the snap-fit ​​block snaps into the snap-fit ​​groove.

33. The rotating mechanism according to claim 13, characterized in that, One of the first swing arm and the second swing arm is provided with a snap-fit ​​groove, and the other is provided with a snap-fit ​​block; the snap-fit ​​block snaps into the snap-fit ​​groove.

34. The rotating mechanism according to any one of claims 1-11, characterized in that, The first spiral block and the second spiral block are symmetrical with respect to the synchronization body.

35. A foldable electronic device, characterized in that, include: The rotating mechanism as described in any one of claims 1-34.

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